Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
6aba47ca | 3 | Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
0fb0cc75 JB |
4 | 2004, 2005, 2006, 2007, 2008, 2009 |
5 | Free Software Foundation, Inc. | |
c906108c SS |
6 | |
7 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
8 | Inc. with support from Florida State University (under contract | |
9 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
10 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
11 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 12 | support. |
c906108c | 13 | |
c5aa993b | 14 | This file is part of GDB. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is free software; you can redistribute it and/or modify |
17 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
18 | the Free Software Foundation; either version 3 of the License, or |
19 | (at your option) any later version. | |
c906108c | 20 | |
a9762ec7 JB |
21 | This program is distributed in the hope that it will be useful, |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | GNU General Public License for more details. | |
c906108c | 25 | |
c5aa993b | 26 | You should have received a copy of the GNU General Public License |
a9762ec7 | 27 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
28 | |
29 | #include "defs.h" | |
30 | #include "bfd.h" | |
c906108c SS |
31 | #include "symtab.h" |
32 | #include "gdbtypes.h" | |
c906108c SS |
33 | #include "objfiles.h" |
34 | #include "elf/dwarf2.h" | |
35 | #include "buildsym.h" | |
36 | #include "demangle.h" | |
37 | #include "expression.h" | |
d5166ae1 | 38 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 39 | #include "macrotab.h" |
c906108c SS |
40 | #include "language.h" |
41 | #include "complaints.h" | |
357e46e7 | 42 | #include "bcache.h" |
4c2df51b DJ |
43 | #include "dwarf2expr.h" |
44 | #include "dwarf2loc.h" | |
9219021c | 45 | #include "cp-support.h" |
72bf9492 | 46 | #include "hashtab.h" |
ae038cb0 DJ |
47 | #include "command.h" |
48 | #include "gdbcmd.h" | |
edb3359d | 49 | #include "block.h" |
ff013f42 | 50 | #include "addrmap.h" |
4c2df51b | 51 | |
c906108c SS |
52 | #include <fcntl.h> |
53 | #include "gdb_string.h" | |
4bdf3d34 | 54 | #include "gdb_assert.h" |
c906108c | 55 | #include <sys/types.h> |
233a11ab CS |
56 | #ifdef HAVE_ZLIB_H |
57 | #include <zlib.h> | |
58 | #endif | |
dce234bc PP |
59 | #ifdef HAVE_MMAP |
60 | #include <sys/mman.h> | |
61 | #endif | |
d8151005 | 62 | |
107d2387 | 63 | #if 0 |
357e46e7 | 64 | /* .debug_info header for a compilation unit |
c906108c SS |
65 | Because of alignment constraints, this structure has padding and cannot |
66 | be mapped directly onto the beginning of the .debug_info section. */ | |
67 | typedef struct comp_unit_header | |
68 | { | |
69 | unsigned int length; /* length of the .debug_info | |
70 | contribution */ | |
71 | unsigned short version; /* version number -- 2 for DWARF | |
72 | version 2 */ | |
73 | unsigned int abbrev_offset; /* offset into .debug_abbrev section */ | |
74 | unsigned char addr_size; /* byte size of an address -- 4 */ | |
75 | } | |
76 | _COMP_UNIT_HEADER; | |
77 | #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 | |
107d2387 | 78 | #endif |
c906108c SS |
79 | |
80 | /* .debug_pubnames header | |
81 | Because of alignment constraints, this structure has padding and cannot | |
82 | be mapped directly onto the beginning of the .debug_info section. */ | |
83 | typedef struct pubnames_header | |
84 | { | |
85 | unsigned int length; /* length of the .debug_pubnames | |
86 | contribution */ | |
87 | unsigned char version; /* version number -- 2 for DWARF | |
88 | version 2 */ | |
89 | unsigned int info_offset; /* offset into .debug_info section */ | |
90 | unsigned int info_size; /* byte size of .debug_info section | |
91 | portion */ | |
92 | } | |
93 | _PUBNAMES_HEADER; | |
94 | #define _ACTUAL_PUBNAMES_HEADER_SIZE 13 | |
95 | ||
96 | /* .debug_pubnames header | |
97 | Because of alignment constraints, this structure has padding and cannot | |
98 | be mapped directly onto the beginning of the .debug_info section. */ | |
99 | typedef struct aranges_header | |
100 | { | |
101 | unsigned int length; /* byte len of the .debug_aranges | |
102 | contribution */ | |
103 | unsigned short version; /* version number -- 2 for DWARF | |
104 | version 2 */ | |
105 | unsigned int info_offset; /* offset into .debug_info section */ | |
106 | unsigned char addr_size; /* byte size of an address */ | |
107 | unsigned char seg_size; /* byte size of segment descriptor */ | |
108 | } | |
109 | _ARANGES_HEADER; | |
110 | #define _ACTUAL_ARANGES_HEADER_SIZE 12 | |
111 | ||
112 | /* .debug_line statement program prologue | |
113 | Because of alignment constraints, this structure has padding and cannot | |
114 | be mapped directly onto the beginning of the .debug_info section. */ | |
115 | typedef struct statement_prologue | |
116 | { | |
117 | unsigned int total_length; /* byte length of the statement | |
118 | information */ | |
119 | unsigned short version; /* version number -- 2 for DWARF | |
120 | version 2 */ | |
121 | unsigned int prologue_length; /* # bytes between prologue & | |
122 | stmt program */ | |
123 | unsigned char minimum_instruction_length; /* byte size of | |
124 | smallest instr */ | |
125 | unsigned char default_is_stmt; /* initial value of is_stmt | |
126 | register */ | |
127 | char line_base; | |
128 | unsigned char line_range; | |
129 | unsigned char opcode_base; /* number assigned to first special | |
130 | opcode */ | |
131 | unsigned char *standard_opcode_lengths; | |
132 | } | |
133 | _STATEMENT_PROLOGUE; | |
134 | ||
d97bc12b DE |
135 | /* When non-zero, dump DIEs after they are read in. */ |
136 | static int dwarf2_die_debug = 0; | |
137 | ||
dce234bc PP |
138 | static int pagesize; |
139 | ||
df8a16a1 DJ |
140 | /* When set, the file that we're processing is known to have debugging |
141 | info for C++ namespaces. GCC 3.3.x did not produce this information, | |
142 | but later versions do. */ | |
143 | ||
144 | static int processing_has_namespace_info; | |
145 | ||
6502dd73 DJ |
146 | static const struct objfile_data *dwarf2_objfile_data_key; |
147 | ||
dce234bc PP |
148 | struct dwarf2_section_info |
149 | { | |
150 | asection *asection; | |
151 | gdb_byte *buffer; | |
152 | bfd_size_type size; | |
153 | int was_mmapped; | |
154 | }; | |
155 | ||
6502dd73 DJ |
156 | struct dwarf2_per_objfile |
157 | { | |
dce234bc PP |
158 | struct dwarf2_section_info info; |
159 | struct dwarf2_section_info abbrev; | |
160 | struct dwarf2_section_info line; | |
161 | struct dwarf2_section_info pubnames; | |
162 | struct dwarf2_section_info aranges; | |
163 | struct dwarf2_section_info loc; | |
164 | struct dwarf2_section_info macinfo; | |
165 | struct dwarf2_section_info str; | |
166 | struct dwarf2_section_info ranges; | |
167 | struct dwarf2_section_info frame; | |
168 | struct dwarf2_section_info eh_frame; | |
ae038cb0 | 169 | |
10b3939b DJ |
170 | /* A list of all the compilation units. This is used to locate |
171 | the target compilation unit of a particular reference. */ | |
ae038cb0 DJ |
172 | struct dwarf2_per_cu_data **all_comp_units; |
173 | ||
174 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
175 | int n_comp_units; | |
176 | ||
177 | /* A chain of compilation units that are currently read in, so that | |
178 | they can be freed later. */ | |
179 | struct dwarf2_per_cu_data *read_in_chain; | |
72dca2f5 FR |
180 | |
181 | /* A flag indicating wether this objfile has a section loaded at a | |
182 | VMA of 0. */ | |
183 | int has_section_at_zero; | |
6502dd73 DJ |
184 | }; |
185 | ||
186 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c SS |
187 | |
188 | /* names of the debugging sections */ | |
189 | ||
233a11ab CS |
190 | /* Note that if the debugging section has been compressed, it might |
191 | have a name like .zdebug_info. */ | |
192 | ||
193 | #define INFO_SECTION "debug_info" | |
194 | #define ABBREV_SECTION "debug_abbrev" | |
195 | #define LINE_SECTION "debug_line" | |
196 | #define PUBNAMES_SECTION "debug_pubnames" | |
197 | #define ARANGES_SECTION "debug_aranges" | |
198 | #define LOC_SECTION "debug_loc" | |
199 | #define MACINFO_SECTION "debug_macinfo" | |
200 | #define STR_SECTION "debug_str" | |
201 | #define RANGES_SECTION "debug_ranges" | |
202 | #define FRAME_SECTION "debug_frame" | |
203 | #define EH_FRAME_SECTION "eh_frame" | |
c906108c SS |
204 | |
205 | /* local data types */ | |
206 | ||
57349743 JB |
207 | /* We hold several abbreviation tables in memory at the same time. */ |
208 | #ifndef ABBREV_HASH_SIZE | |
209 | #define ABBREV_HASH_SIZE 121 | |
210 | #endif | |
211 | ||
107d2387 AC |
212 | /* The data in a compilation unit header, after target2host |
213 | translation, looks like this. */ | |
c906108c | 214 | struct comp_unit_head |
a738430d | 215 | { |
c764a876 | 216 | unsigned int length; |
a738430d | 217 | short version; |
a738430d MK |
218 | unsigned char addr_size; |
219 | unsigned char signed_addr_p; | |
9cbfa09e | 220 | unsigned int abbrev_offset; |
57349743 | 221 | |
a738430d MK |
222 | /* Size of file offsets; either 4 or 8. */ |
223 | unsigned int offset_size; | |
57349743 | 224 | |
a738430d MK |
225 | /* Size of the length field; either 4 or 12. */ |
226 | unsigned int initial_length_size; | |
57349743 | 227 | |
a738430d MK |
228 | /* Offset to the first byte of this compilation unit header in the |
229 | .debug_info section, for resolving relative reference dies. */ | |
230 | unsigned int offset; | |
57349743 | 231 | |
d00adf39 DE |
232 | /* Offset to first die in this cu from the start of the cu. |
233 | This will be the first byte following the compilation unit header. */ | |
234 | unsigned int first_die_offset; | |
a738430d | 235 | }; |
c906108c | 236 | |
e7c27a73 DJ |
237 | /* Internal state when decoding a particular compilation unit. */ |
238 | struct dwarf2_cu | |
239 | { | |
240 | /* The objfile containing this compilation unit. */ | |
241 | struct objfile *objfile; | |
242 | ||
d00adf39 | 243 | /* The header of the compilation unit. */ |
e7c27a73 | 244 | struct comp_unit_head header; |
e142c38c | 245 | |
d00adf39 DE |
246 | /* Base address of this compilation unit. */ |
247 | CORE_ADDR base_address; | |
248 | ||
249 | /* Non-zero if base_address has been set. */ | |
250 | int base_known; | |
251 | ||
e142c38c DJ |
252 | struct function_range *first_fn, *last_fn, *cached_fn; |
253 | ||
254 | /* The language we are debugging. */ | |
255 | enum language language; | |
256 | const struct language_defn *language_defn; | |
257 | ||
b0f35d58 DL |
258 | const char *producer; |
259 | ||
e142c38c DJ |
260 | /* The generic symbol table building routines have separate lists for |
261 | file scope symbols and all all other scopes (local scopes). So | |
262 | we need to select the right one to pass to add_symbol_to_list(). | |
263 | We do it by keeping a pointer to the correct list in list_in_scope. | |
264 | ||
265 | FIXME: The original dwarf code just treated the file scope as the | |
266 | first local scope, and all other local scopes as nested local | |
267 | scopes, and worked fine. Check to see if we really need to | |
268 | distinguish these in buildsym.c. */ | |
269 | struct pending **list_in_scope; | |
270 | ||
f3dd6933 DJ |
271 | /* DWARF abbreviation table associated with this compilation unit. */ |
272 | struct abbrev_info **dwarf2_abbrevs; | |
273 | ||
274 | /* Storage for the abbrev table. */ | |
275 | struct obstack abbrev_obstack; | |
72bf9492 DJ |
276 | |
277 | /* Hash table holding all the loaded partial DIEs. */ | |
278 | htab_t partial_dies; | |
279 | ||
ff013f42 | 280 | /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */ |
c764a876 | 281 | unsigned int ranges_offset; |
ff013f42 | 282 | |
72bf9492 DJ |
283 | /* Storage for things with the same lifetime as this read-in compilation |
284 | unit, including partial DIEs. */ | |
285 | struct obstack comp_unit_obstack; | |
286 | ||
ae038cb0 DJ |
287 | /* When multiple dwarf2_cu structures are living in memory, this field |
288 | chains them all together, so that they can be released efficiently. | |
289 | We will probably also want a generation counter so that most-recently-used | |
290 | compilation units are cached... */ | |
291 | struct dwarf2_per_cu_data *read_in_chain; | |
292 | ||
293 | /* Backchain to our per_cu entry if the tree has been built. */ | |
294 | struct dwarf2_per_cu_data *per_cu; | |
295 | ||
f792889a DJ |
296 | /* Pointer to the die -> type map. Although it is stored |
297 | permanently in per_cu, we copy it here to avoid double | |
298 | indirection. */ | |
299 | htab_t type_hash; | |
300 | ||
ae038cb0 DJ |
301 | /* How many compilation units ago was this CU last referenced? */ |
302 | int last_used; | |
303 | ||
10b3939b | 304 | /* A hash table of die offsets for following references. */ |
51545339 | 305 | htab_t die_hash; |
10b3939b DJ |
306 | |
307 | /* Full DIEs if read in. */ | |
308 | struct die_info *dies; | |
309 | ||
310 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
311 | units referenced by this one. Only set during full symbol processing; | |
312 | partial symbol tables do not have dependencies. */ | |
313 | htab_t dependencies; | |
314 | ||
cb1df416 DJ |
315 | /* Header data from the line table, during full symbol processing. */ |
316 | struct line_header *line_header; | |
317 | ||
ae038cb0 DJ |
318 | /* Mark used when releasing cached dies. */ |
319 | unsigned int mark : 1; | |
320 | ||
321 | /* This flag will be set if this compilation unit might include | |
322 | inter-compilation-unit references. */ | |
323 | unsigned int has_form_ref_addr : 1; | |
324 | ||
72bf9492 DJ |
325 | /* This flag will be set if this compilation unit includes any |
326 | DW_TAG_namespace DIEs. If we know that there are explicit | |
327 | DIEs for namespaces, we don't need to try to infer them | |
328 | from mangled names. */ | |
329 | unsigned int has_namespace_info : 1; | |
ff013f42 JK |
330 | |
331 | /* Field `ranges_offset' is filled in; flag as the value may be zero. */ | |
332 | unsigned int has_ranges_offset : 1; | |
e7c27a73 DJ |
333 | }; |
334 | ||
10b3939b DJ |
335 | /* Persistent data held for a compilation unit, even when not |
336 | processing it. We put a pointer to this structure in the | |
337 | read_symtab_private field of the psymtab. If we encounter | |
338 | inter-compilation-unit references, we also maintain a sorted | |
339 | list of all compilation units. */ | |
340 | ||
ae038cb0 DJ |
341 | struct dwarf2_per_cu_data |
342 | { | |
5afb4e99 | 343 | /* The start offset and length of this compilation unit. 2**30-1 |
ae038cb0 | 344 | bytes should suffice to store the length of any compilation unit |
45452591 DE |
345 | - if it doesn't, GDB will fall over anyway. |
346 | NOTE: Unlike comp_unit_head.length, this length includes | |
347 | initial_length_size. */ | |
c764a876 DE |
348 | unsigned int offset; |
349 | unsigned int length : 30; | |
ae038cb0 DJ |
350 | |
351 | /* Flag indicating this compilation unit will be read in before | |
352 | any of the current compilation units are processed. */ | |
c764a876 | 353 | unsigned int queued : 1; |
ae038cb0 | 354 | |
5afb4e99 DJ |
355 | /* This flag will be set if we need to load absolutely all DIEs |
356 | for this compilation unit, instead of just the ones we think | |
357 | are interesting. It gets set if we look for a DIE in the | |
358 | hash table and don't find it. */ | |
359 | unsigned int load_all_dies : 1; | |
360 | ||
ae038cb0 DJ |
361 | /* Set iff currently read in. */ |
362 | struct dwarf2_cu *cu; | |
1c379e20 DJ |
363 | |
364 | /* If full symbols for this CU have been read in, then this field | |
365 | holds a map of DIE offsets to types. It isn't always possible | |
366 | to reconstruct this information later, so we have to preserve | |
367 | it. */ | |
1c379e20 | 368 | htab_t type_hash; |
10b3939b | 369 | |
31ffec48 DJ |
370 | /* The partial symbol table associated with this compilation unit, |
371 | or NULL for partial units (which do not have an associated | |
372 | symtab). */ | |
10b3939b | 373 | struct partial_symtab *psymtab; |
ae038cb0 DJ |
374 | }; |
375 | ||
debd256d JB |
376 | /* The line number information for a compilation unit (found in the |
377 | .debug_line section) begins with a "statement program header", | |
378 | which contains the following information. */ | |
379 | struct line_header | |
380 | { | |
381 | unsigned int total_length; | |
382 | unsigned short version; | |
383 | unsigned int header_length; | |
384 | unsigned char minimum_instruction_length; | |
385 | unsigned char default_is_stmt; | |
386 | int line_base; | |
387 | unsigned char line_range; | |
388 | unsigned char opcode_base; | |
389 | ||
390 | /* standard_opcode_lengths[i] is the number of operands for the | |
391 | standard opcode whose value is i. This means that | |
392 | standard_opcode_lengths[0] is unused, and the last meaningful | |
393 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
394 | unsigned char *standard_opcode_lengths; | |
395 | ||
396 | /* The include_directories table. NOTE! These strings are not | |
397 | allocated with xmalloc; instead, they are pointers into | |
398 | debug_line_buffer. If you try to free them, `free' will get | |
399 | indigestion. */ | |
400 | unsigned int num_include_dirs, include_dirs_size; | |
401 | char **include_dirs; | |
402 | ||
403 | /* The file_names table. NOTE! These strings are not allocated | |
404 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
405 | Don't try to free them directly. */ | |
406 | unsigned int num_file_names, file_names_size; | |
407 | struct file_entry | |
c906108c | 408 | { |
debd256d JB |
409 | char *name; |
410 | unsigned int dir_index; | |
411 | unsigned int mod_time; | |
412 | unsigned int length; | |
aaa75496 | 413 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 414 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
415 | } *file_names; |
416 | ||
417 | /* The start and end of the statement program following this | |
6502dd73 | 418 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fe1b8b76 | 419 | gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 420 | }; |
c906108c SS |
421 | |
422 | /* When we construct a partial symbol table entry we only | |
423 | need this much information. */ | |
424 | struct partial_die_info | |
425 | { | |
72bf9492 | 426 | /* Offset of this DIE. */ |
c906108c | 427 | unsigned int offset; |
72bf9492 DJ |
428 | |
429 | /* DWARF-2 tag for this DIE. */ | |
430 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
431 | ||
432 | /* Language code associated with this DIE. This is only used | |
433 | for the compilation unit DIE. */ | |
434 | unsigned int language : 8; | |
435 | ||
436 | /* Assorted flags describing the data found in this DIE. */ | |
437 | unsigned int has_children : 1; | |
438 | unsigned int is_external : 1; | |
439 | unsigned int is_declaration : 1; | |
440 | unsigned int has_type : 1; | |
441 | unsigned int has_specification : 1; | |
aaa75496 | 442 | unsigned int has_stmt_list : 1; |
72bf9492 DJ |
443 | unsigned int has_pc_info : 1; |
444 | ||
445 | /* Flag set if the SCOPE field of this structure has been | |
446 | computed. */ | |
447 | unsigned int scope_set : 1; | |
448 | ||
fa4028e9 JB |
449 | /* Flag set if the DIE has a byte_size attribute. */ |
450 | unsigned int has_byte_size : 1; | |
451 | ||
72bf9492 DJ |
452 | /* The name of this DIE. Normally the value of DW_AT_name, but |
453 | sometimes DW_TAG_MIPS_linkage_name or a string computed in some | |
454 | other fashion. */ | |
c906108c | 455 | char *name; |
57c22c6c | 456 | char *dirname; |
72bf9492 DJ |
457 | |
458 | /* The scope to prepend to our children. This is generally | |
459 | allocated on the comp_unit_obstack, so will disappear | |
460 | when this compilation unit leaves the cache. */ | |
461 | char *scope; | |
462 | ||
463 | /* The location description associated with this DIE, if any. */ | |
464 | struct dwarf_block *locdesc; | |
465 | ||
466 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
467 | CORE_ADDR lowpc; |
468 | CORE_ADDR highpc; | |
72bf9492 DJ |
469 | |
470 | /* Pointer into the info_buffer pointing at the target of | |
471 | DW_AT_sibling, if any. */ | |
fe1b8b76 | 472 | gdb_byte *sibling; |
72bf9492 DJ |
473 | |
474 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
475 | DW_AT_specification (or DW_AT_abstract_origin or | |
476 | DW_AT_extension). */ | |
477 | unsigned int spec_offset; | |
478 | ||
aaa75496 JB |
479 | /* If HAS_STMT_LIST, the offset of the Line Number Information data. */ |
480 | unsigned int line_offset; | |
481 | ||
72bf9492 DJ |
482 | /* Pointers to this DIE's parent, first child, and next sibling, |
483 | if any. */ | |
484 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
485 | }; |
486 | ||
487 | /* This data structure holds the information of an abbrev. */ | |
488 | struct abbrev_info | |
489 | { | |
490 | unsigned int number; /* number identifying abbrev */ | |
491 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
492 | unsigned short has_children; /* boolean */ |
493 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
494 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
495 | struct abbrev_info *next; /* next in chain */ | |
496 | }; | |
497 | ||
498 | struct attr_abbrev | |
499 | { | |
9d25dd43 DE |
500 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
501 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
502 | }; |
503 | ||
71c25dea TT |
504 | /* Additional GDB-specific attribute forms. */ |
505 | enum | |
506 | { | |
507 | /* A string which has been updated to GDB's internal | |
508 | representation (e.g. converted to canonical form) and does not | |
509 | need to be updated again. */ | |
510 | GDB_FORM_cached_string = 0xff | |
511 | }; | |
512 | ||
b60c80d6 DJ |
513 | /* Attributes have a name and a value */ |
514 | struct attribute | |
515 | { | |
9d25dd43 DE |
516 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
517 | ENUM_BITFIELD(dwarf_form) form : 16; | |
b60c80d6 DJ |
518 | union |
519 | { | |
520 | char *str; | |
521 | struct dwarf_block *blk; | |
522 | unsigned long unsnd; | |
523 | long int snd; | |
524 | CORE_ADDR addr; | |
525 | } | |
526 | u; | |
527 | }; | |
528 | ||
c906108c SS |
529 | /* This data structure holds a complete die structure. */ |
530 | struct die_info | |
531 | { | |
76815b17 DE |
532 | /* DWARF-2 tag for this DIE. */ |
533 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
534 | ||
535 | /* Number of attributes */ | |
536 | unsigned short num_attrs; | |
537 | ||
538 | /* Abbrev number */ | |
539 | unsigned int abbrev; | |
540 | ||
541 | /* Offset in .debug_info section */ | |
542 | unsigned int offset; | |
78ba4af6 JB |
543 | |
544 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
545 | points to this die's parent; CHILD points to the first child of | |
546 | this node; and all the children of a given node are chained | |
547 | together via their SIBLING fields, terminated by a die whose | |
548 | tag is zero. */ | |
639d11d3 DC |
549 | struct die_info *child; /* Its first child, if any. */ |
550 | struct die_info *sibling; /* Its next sibling, if any. */ | |
551 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 552 | |
b60c80d6 DJ |
553 | /* An array of attributes, with NUM_ATTRS elements. There may be |
554 | zero, but it's not common and zero-sized arrays are not | |
555 | sufficiently portable C. */ | |
556 | struct attribute attrs[1]; | |
c906108c SS |
557 | }; |
558 | ||
5fb290d7 DJ |
559 | struct function_range |
560 | { | |
561 | const char *name; | |
562 | CORE_ADDR lowpc, highpc; | |
563 | int seen_line; | |
564 | struct function_range *next; | |
565 | }; | |
566 | ||
c906108c SS |
567 | /* Get at parts of an attribute structure */ |
568 | ||
569 | #define DW_STRING(attr) ((attr)->u.str) | |
570 | #define DW_UNSND(attr) ((attr)->u.unsnd) | |
571 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
572 | #define DW_SND(attr) ((attr)->u.snd) | |
573 | #define DW_ADDR(attr) ((attr)->u.addr) | |
574 | ||
575 | /* Blocks are a bunch of untyped bytes. */ | |
576 | struct dwarf_block | |
577 | { | |
578 | unsigned int size; | |
fe1b8b76 | 579 | gdb_byte *data; |
c906108c SS |
580 | }; |
581 | ||
c906108c SS |
582 | #ifndef ATTR_ALLOC_CHUNK |
583 | #define ATTR_ALLOC_CHUNK 4 | |
584 | #endif | |
585 | ||
c906108c SS |
586 | /* Allocate fields for structs, unions and enums in this size. */ |
587 | #ifndef DW_FIELD_ALLOC_CHUNK | |
588 | #define DW_FIELD_ALLOC_CHUNK 4 | |
589 | #endif | |
590 | ||
c906108c SS |
591 | /* A zeroed version of a partial die for initialization purposes. */ |
592 | static struct partial_die_info zeroed_partial_die; | |
593 | ||
c906108c SS |
594 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
595 | but this would require a corresponding change in unpack_field_as_long | |
596 | and friends. */ | |
597 | static int bits_per_byte = 8; | |
598 | ||
599 | /* The routines that read and process dies for a C struct or C++ class | |
600 | pass lists of data member fields and lists of member function fields | |
601 | in an instance of a field_info structure, as defined below. */ | |
602 | struct field_info | |
c5aa993b JM |
603 | { |
604 | /* List of data member and baseclasses fields. */ | |
605 | struct nextfield | |
606 | { | |
607 | struct nextfield *next; | |
608 | int accessibility; | |
609 | int virtuality; | |
610 | struct field field; | |
611 | } | |
612 | *fields; | |
c906108c | 613 | |
c5aa993b JM |
614 | /* Number of fields. */ |
615 | int nfields; | |
c906108c | 616 | |
c5aa993b JM |
617 | /* Number of baseclasses. */ |
618 | int nbaseclasses; | |
c906108c | 619 | |
c5aa993b JM |
620 | /* Set if the accesibility of one of the fields is not public. */ |
621 | int non_public_fields; | |
c906108c | 622 | |
c5aa993b JM |
623 | /* Member function fields array, entries are allocated in the order they |
624 | are encountered in the object file. */ | |
625 | struct nextfnfield | |
626 | { | |
627 | struct nextfnfield *next; | |
628 | struct fn_field fnfield; | |
629 | } | |
630 | *fnfields; | |
c906108c | 631 | |
c5aa993b JM |
632 | /* Member function fieldlist array, contains name of possibly overloaded |
633 | member function, number of overloaded member functions and a pointer | |
634 | to the head of the member function field chain. */ | |
635 | struct fnfieldlist | |
636 | { | |
637 | char *name; | |
638 | int length; | |
639 | struct nextfnfield *head; | |
640 | } | |
641 | *fnfieldlists; | |
c906108c | 642 | |
c5aa993b JM |
643 | /* Number of entries in the fnfieldlists array. */ |
644 | int nfnfields; | |
645 | }; | |
c906108c | 646 | |
10b3939b DJ |
647 | /* One item on the queue of compilation units to read in full symbols |
648 | for. */ | |
649 | struct dwarf2_queue_item | |
650 | { | |
651 | struct dwarf2_per_cu_data *per_cu; | |
652 | struct dwarf2_queue_item *next; | |
653 | }; | |
654 | ||
655 | /* The current queue. */ | |
656 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
657 | ||
ae038cb0 DJ |
658 | /* Loaded secondary compilation units are kept in memory until they |
659 | have not been referenced for the processing of this many | |
660 | compilation units. Set this to zero to disable caching. Cache | |
661 | sizes of up to at least twenty will improve startup time for | |
662 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
663 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
664 | static void |
665 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
666 | struct cmd_list_element *c, const char *value) | |
667 | { | |
668 | fprintf_filtered (file, _("\ | |
669 | The upper bound on the age of cached dwarf2 compilation units is %s.\n"), | |
670 | value); | |
671 | } | |
672 | ||
ae038cb0 | 673 | |
c906108c SS |
674 | /* Various complaints about symbol reading that don't abort the process */ |
675 | ||
4d3c2250 KB |
676 | static void |
677 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 678 | { |
4d3c2250 | 679 | complaint (&symfile_complaints, |
e2e0b3e5 | 680 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
681 | } |
682 | ||
25e43795 DJ |
683 | static void |
684 | dwarf2_debug_line_missing_file_complaint (void) | |
685 | { | |
686 | complaint (&symfile_complaints, | |
687 | _(".debug_line section has line data without a file")); | |
688 | } | |
689 | ||
59205f5a JB |
690 | static void |
691 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
692 | { | |
693 | complaint (&symfile_complaints, | |
694 | _(".debug_line section has line program sequence without an end")); | |
695 | } | |
696 | ||
4d3c2250 KB |
697 | static void |
698 | dwarf2_complex_location_expr_complaint (void) | |
2e276125 | 699 | { |
e2e0b3e5 | 700 | complaint (&symfile_complaints, _("location expression too complex")); |
4d3c2250 KB |
701 | } |
702 | ||
4d3c2250 KB |
703 | static void |
704 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
705 | int arg3) | |
2e276125 | 706 | { |
4d3c2250 | 707 | complaint (&symfile_complaints, |
e2e0b3e5 | 708 | _("const value length mismatch for '%s', got %d, expected %d"), arg1, |
4d3c2250 KB |
709 | arg2, arg3); |
710 | } | |
711 | ||
712 | static void | |
713 | dwarf2_macros_too_long_complaint (void) | |
2e276125 | 714 | { |
4d3c2250 | 715 | complaint (&symfile_complaints, |
e2e0b3e5 | 716 | _("macro info runs off end of `.debug_macinfo' section")); |
4d3c2250 KB |
717 | } |
718 | ||
719 | static void | |
720 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
8e19ed76 | 721 | { |
4d3c2250 | 722 | complaint (&symfile_complaints, |
e2e0b3e5 | 723 | _("macro debug info contains a malformed macro definition:\n`%s'"), |
4d3c2250 KB |
724 | arg1); |
725 | } | |
726 | ||
727 | static void | |
728 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
8b2dbe47 | 729 | { |
4d3c2250 | 730 | complaint (&symfile_complaints, |
e2e0b3e5 | 731 | _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2); |
4d3c2250 | 732 | } |
c906108c | 733 | |
c906108c SS |
734 | /* local function prototypes */ |
735 | ||
4efb68b1 | 736 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c SS |
737 | |
738 | #if 0 | |
a14ed312 | 739 | static void dwarf2_build_psymtabs_easy (struct objfile *, int); |
c906108c SS |
740 | #endif |
741 | ||
aaa75496 JB |
742 | static void dwarf2_create_include_psymtab (char *, struct partial_symtab *, |
743 | struct objfile *); | |
744 | ||
745 | static void dwarf2_build_include_psymtabs (struct dwarf2_cu *, | |
746 | struct partial_die_info *, | |
747 | struct partial_symtab *); | |
748 | ||
a14ed312 | 749 | static void dwarf2_build_psymtabs_hard (struct objfile *, int); |
c906108c | 750 | |
72bf9492 DJ |
751 | static void scan_partial_symbols (struct partial_die_info *, |
752 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 753 | int, struct dwarf2_cu *); |
c906108c | 754 | |
72bf9492 DJ |
755 | static void add_partial_symbol (struct partial_die_info *, |
756 | struct dwarf2_cu *); | |
63d06c5c | 757 | |
72bf9492 | 758 | static int pdi_needs_namespace (enum dwarf_tag tag); |
91c24f0a | 759 | |
72bf9492 DJ |
760 | static void add_partial_namespace (struct partial_die_info *pdi, |
761 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 762 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 763 | |
5d7cb8df JK |
764 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
765 | CORE_ADDR *highpc, int need_pc, | |
766 | struct dwarf2_cu *cu); | |
767 | ||
72bf9492 DJ |
768 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
769 | struct dwarf2_cu *cu); | |
91c24f0a | 770 | |
bc30ff58 JB |
771 | static void add_partial_subprogram (struct partial_die_info *pdi, |
772 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 773 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 774 | |
fe1b8b76 JB |
775 | static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi, |
776 | gdb_byte *info_ptr, | |
777 | bfd *abfd, | |
778 | struct dwarf2_cu *cu); | |
91c24f0a | 779 | |
a14ed312 | 780 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 781 | |
a14ed312 | 782 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 783 | |
e7c27a73 | 784 | static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu); |
c906108c | 785 | |
f3dd6933 | 786 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 787 | |
fe1b8b76 | 788 | static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *, |
891d2f0b | 789 | struct dwarf2_cu *); |
72bf9492 | 790 | |
57349743 | 791 | static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int, |
e7c27a73 | 792 | struct dwarf2_cu *); |
c906108c | 793 | |
fe1b8b76 | 794 | static struct partial_die_info *load_partial_dies (bfd *, gdb_byte *, int, |
72bf9492 DJ |
795 | struct dwarf2_cu *); |
796 | ||
fe1b8b76 JB |
797 | static gdb_byte *read_partial_die (struct partial_die_info *, |
798 | struct abbrev_info *abbrev, unsigned int, | |
799 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
c906108c | 800 | |
c764a876 | 801 | static struct partial_die_info *find_partial_die (unsigned int, |
10b3939b | 802 | struct dwarf2_cu *); |
72bf9492 DJ |
803 | |
804 | static void fixup_partial_die (struct partial_die_info *, | |
805 | struct dwarf2_cu *); | |
806 | ||
fe1b8b76 JB |
807 | static gdb_byte *read_full_die (struct die_info **, bfd *, gdb_byte *, |
808 | struct dwarf2_cu *, int *); | |
c906108c | 809 | |
fe1b8b76 JB |
810 | static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *, |
811 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
c906108c | 812 | |
fe1b8b76 JB |
813 | static gdb_byte *read_attribute_value (struct attribute *, unsigned, |
814 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
a8329558 | 815 | |
fe1b8b76 | 816 | static unsigned int read_1_byte (bfd *, gdb_byte *); |
c906108c | 817 | |
fe1b8b76 | 818 | static int read_1_signed_byte (bfd *, gdb_byte *); |
c906108c | 819 | |
fe1b8b76 | 820 | static unsigned int read_2_bytes (bfd *, gdb_byte *); |
c906108c | 821 | |
fe1b8b76 | 822 | static unsigned int read_4_bytes (bfd *, gdb_byte *); |
c906108c | 823 | |
fe1b8b76 | 824 | static unsigned long read_8_bytes (bfd *, gdb_byte *); |
c906108c | 825 | |
fe1b8b76 | 826 | static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 827 | unsigned int *); |
c906108c | 828 | |
c764a876 DE |
829 | static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *); |
830 | ||
831 | static LONGEST read_checked_initial_length_and_offset | |
832 | (bfd *, gdb_byte *, const struct comp_unit_head *, | |
833 | unsigned int *, unsigned int *); | |
613e1657 | 834 | |
fe1b8b76 | 835 | static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *, |
c764a876 DE |
836 | unsigned int *); |
837 | ||
838 | static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int); | |
613e1657 | 839 | |
fe1b8b76 | 840 | static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int); |
c906108c | 841 | |
fe1b8b76 | 842 | static char *read_string (bfd *, gdb_byte *, unsigned int *); |
c906108c | 843 | |
fe1b8b76 JB |
844 | static char *read_indirect_string (bfd *, gdb_byte *, |
845 | const struct comp_unit_head *, | |
846 | unsigned int *); | |
4bdf3d34 | 847 | |
fe1b8b76 | 848 | static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 849 | |
fe1b8b76 | 850 | static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 851 | |
fe1b8b76 | 852 | static gdb_byte *skip_leb128 (bfd *, gdb_byte *); |
4bb7a0a7 | 853 | |
e142c38c | 854 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 855 | |
e142c38c DJ |
856 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
857 | struct dwarf2_cu *); | |
c906108c | 858 | |
05cf31d1 JB |
859 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
860 | struct dwarf2_cu *cu); | |
861 | ||
e142c38c | 862 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 863 | |
e142c38c | 864 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 865 | struct dwarf2_cu **); |
63d06c5c | 866 | |
debd256d JB |
867 | static void free_line_header (struct line_header *lh); |
868 | ||
aaa75496 JB |
869 | static void add_file_name (struct line_header *, char *, unsigned int, |
870 | unsigned int, unsigned int); | |
871 | ||
debd256d JB |
872 | static struct line_header *(dwarf_decode_line_header |
873 | (unsigned int offset, | |
e7c27a73 | 874 | bfd *abfd, struct dwarf2_cu *cu)); |
debd256d JB |
875 | |
876 | static void dwarf_decode_lines (struct line_header *, char *, bfd *, | |
aaa75496 | 877 | struct dwarf2_cu *, struct partial_symtab *); |
c906108c | 878 | |
4f1520fb | 879 | static void dwarf2_start_subfile (char *, char *, char *); |
c906108c | 880 | |
a14ed312 | 881 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 882 | struct dwarf2_cu *); |
c906108c | 883 | |
a14ed312 | 884 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 885 | struct dwarf2_cu *); |
c906108c | 886 | |
2df3850c JM |
887 | static void dwarf2_const_value_data (struct attribute *attr, |
888 | struct symbol *sym, | |
889 | int bits); | |
890 | ||
e7c27a73 | 891 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 892 | |
e7c27a73 DJ |
893 | static struct type *die_containing_type (struct die_info *, |
894 | struct dwarf2_cu *); | |
c906108c | 895 | |
e7c27a73 | 896 | static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 897 | |
f792889a | 898 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 899 | |
086ed43d | 900 | static char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 901 | |
fe1b8b76 JB |
902 | static char *typename_concat (struct obstack *, |
903 | const char *prefix, | |
904 | const char *suffix, | |
987504bb | 905 | struct dwarf2_cu *); |
63d06c5c | 906 | |
e7c27a73 | 907 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 908 | |
e7c27a73 | 909 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 910 | |
e7c27a73 | 911 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 912 | |
ff013f42 JK |
913 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
914 | struct dwarf2_cu *, struct partial_symtab *); | |
915 | ||
a14ed312 | 916 | static int dwarf2_get_pc_bounds (struct die_info *, |
e7c27a73 | 917 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *); |
c906108c | 918 | |
fae299cd DC |
919 | static void get_scope_pc_bounds (struct die_info *, |
920 | CORE_ADDR *, CORE_ADDR *, | |
921 | struct dwarf2_cu *); | |
922 | ||
801e3a5b JB |
923 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
924 | CORE_ADDR, struct dwarf2_cu *); | |
925 | ||
a14ed312 | 926 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 927 | struct dwarf2_cu *); |
c906108c | 928 | |
a14ed312 | 929 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 930 | struct type *, struct dwarf2_cu *); |
c906108c | 931 | |
a14ed312 | 932 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 933 | struct die_info *, struct type *, |
e7c27a73 | 934 | struct dwarf2_cu *); |
c906108c | 935 | |
a14ed312 | 936 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
e7c27a73 | 937 | struct type *, struct dwarf2_cu *); |
c906108c | 938 | |
134d01f1 | 939 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 940 | |
0114d602 DJ |
941 | static const char *determine_class_name (struct die_info *die, |
942 | struct dwarf2_cu *cu); | |
8176b9b8 | 943 | |
e7c27a73 | 944 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 945 | |
e7c27a73 | 946 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 947 | |
5d7cb8df JK |
948 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
949 | ||
27aa8d6a SW |
950 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
951 | ||
38d518c9 | 952 | static const char *namespace_name (struct die_info *die, |
e142c38c | 953 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 954 | |
134d01f1 | 955 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 956 | |
e7c27a73 | 957 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 958 | |
7ca2d3a3 DL |
959 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
960 | struct dwarf2_cu *); | |
961 | ||
fe1b8b76 | 962 | static struct die_info *read_comp_unit (gdb_byte *, bfd *, struct dwarf2_cu *); |
c906108c | 963 | |
d97bc12b DE |
964 | static struct die_info *read_die_and_children_1 (gdb_byte *info_ptr, bfd *abfd, |
965 | struct dwarf2_cu *, | |
966 | gdb_byte **new_info_ptr, | |
967 | struct die_info *parent); | |
968 | ||
fe1b8b76 | 969 | static struct die_info *read_die_and_children (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 970 | struct dwarf2_cu *, |
fe1b8b76 | 971 | gdb_byte **new_info_ptr, |
639d11d3 DC |
972 | struct die_info *parent); |
973 | ||
fe1b8b76 | 974 | static struct die_info *read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 975 | struct dwarf2_cu *, |
fe1b8b76 | 976 | gdb_byte **new_info_ptr, |
639d11d3 DC |
977 | struct die_info *parent); |
978 | ||
e7c27a73 | 979 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 980 | |
e142c38c | 981 | static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *); |
c906108c | 982 | |
71c25dea TT |
983 | static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *, |
984 | struct obstack *); | |
985 | ||
e142c38c | 986 | static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 987 | |
e142c38c | 988 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 989 | struct dwarf2_cu **); |
9219021c | 990 | |
a14ed312 | 991 | static char *dwarf_tag_name (unsigned int); |
c906108c | 992 | |
a14ed312 | 993 | static char *dwarf_attr_name (unsigned int); |
c906108c | 994 | |
a14ed312 | 995 | static char *dwarf_form_name (unsigned int); |
c906108c | 996 | |
a14ed312 | 997 | static char *dwarf_stack_op_name (unsigned int); |
c906108c | 998 | |
a14ed312 | 999 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1000 | |
a14ed312 | 1001 | static char *dwarf_type_encoding_name (unsigned int); |
c906108c SS |
1002 | |
1003 | #if 0 | |
a14ed312 | 1004 | static char *dwarf_cfi_name (unsigned int); |
c906108c SS |
1005 | #endif |
1006 | ||
f9aca02d | 1007 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1008 | |
d97bc12b DE |
1009 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1010 | ||
1011 | static void dump_die_for_error (struct die_info *); | |
1012 | ||
1013 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1014 | struct die_info *); | |
c906108c | 1015 | |
d97bc12b | 1016 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1017 | |
51545339 | 1018 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1019 | struct dwarf2_cu *); |
c906108c | 1020 | |
c764a876 | 1021 | static unsigned int dwarf2_get_ref_die_offset (struct attribute *); |
c906108c | 1022 | |
a02abb62 JB |
1023 | static int dwarf2_get_attr_constant_value (struct attribute *, int); |
1024 | ||
10b3939b DJ |
1025 | static struct die_info *follow_die_ref (struct die_info *, |
1026 | struct attribute *, | |
f2f0e013 | 1027 | struct dwarf2_cu **); |
c906108c | 1028 | |
c906108c SS |
1029 | /* memory allocation interface */ |
1030 | ||
7b5a2f43 | 1031 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1032 | |
f3dd6933 | 1033 | static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *); |
c906108c | 1034 | |
b60c80d6 | 1035 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1036 | |
e142c38c | 1037 | static void initialize_cu_func_list (struct dwarf2_cu *); |
5fb290d7 | 1038 | |
e142c38c DJ |
1039 | static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR, |
1040 | struct dwarf2_cu *); | |
5fb290d7 | 1041 | |
2e276125 | 1042 | static void dwarf_decode_macros (struct line_header *, unsigned int, |
e7c27a73 | 1043 | char *, bfd *, struct dwarf2_cu *); |
2e276125 | 1044 | |
8e19ed76 PS |
1045 | static int attr_form_is_block (struct attribute *); |
1046 | ||
3690dd37 JB |
1047 | static int attr_form_is_section_offset (struct attribute *); |
1048 | ||
1049 | static int attr_form_is_constant (struct attribute *); | |
1050 | ||
93e7bd98 DJ |
1051 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1052 | struct symbol *sym, | |
1053 | struct dwarf2_cu *cu); | |
4c2df51b | 1054 | |
fe1b8b76 JB |
1055 | static gdb_byte *skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev, |
1056 | struct dwarf2_cu *cu); | |
4bb7a0a7 | 1057 | |
72bf9492 DJ |
1058 | static void free_stack_comp_unit (void *); |
1059 | ||
72bf9492 DJ |
1060 | static hashval_t partial_die_hash (const void *item); |
1061 | ||
1062 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1063 | ||
ae038cb0 | 1064 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
c764a876 | 1065 | (unsigned int offset, struct objfile *objfile); |
ae038cb0 DJ |
1066 | |
1067 | static struct dwarf2_per_cu_data *dwarf2_find_comp_unit | |
c764a876 | 1068 | (unsigned int offset, struct objfile *objfile); |
ae038cb0 DJ |
1069 | |
1070 | static void free_one_comp_unit (void *); | |
1071 | ||
1072 | static void free_cached_comp_units (void *); | |
1073 | ||
1074 | static void age_cached_comp_units (void); | |
1075 | ||
1076 | static void free_one_cached_comp_unit (void *); | |
1077 | ||
f792889a DJ |
1078 | static struct type *set_die_type (struct die_info *, struct type *, |
1079 | struct dwarf2_cu *); | |
1c379e20 | 1080 | |
ae038cb0 DJ |
1081 | static void create_all_comp_units (struct objfile *); |
1082 | ||
31ffec48 DJ |
1083 | static struct dwarf2_cu *load_full_comp_unit (struct dwarf2_per_cu_data *, |
1084 | struct objfile *); | |
10b3939b DJ |
1085 | |
1086 | static void process_full_comp_unit (struct dwarf2_per_cu_data *); | |
1087 | ||
1088 | static void dwarf2_add_dependence (struct dwarf2_cu *, | |
1089 | struct dwarf2_per_cu_data *); | |
1090 | ||
ae038cb0 DJ |
1091 | static void dwarf2_mark (struct dwarf2_cu *); |
1092 | ||
1093 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1094 | ||
f792889a | 1095 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1096 | |
c906108c SS |
1097 | /* Try to locate the sections we need for DWARF 2 debugging |
1098 | information and return true if we have enough to do something. */ | |
1099 | ||
1100 | int | |
6502dd73 | 1101 | dwarf2_has_info (struct objfile *objfile) |
c906108c | 1102 | { |
6502dd73 DJ |
1103 | struct dwarf2_per_objfile *data; |
1104 | ||
1105 | /* Initialize per-objfile state. */ | |
1106 | data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
1107 | memset (data, 0, sizeof (*data)); | |
1108 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1109 | dwarf2_per_objfile = data; | |
1110 | ||
6502dd73 | 1111 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL); |
dce234bc | 1112 | return (data->info.asection != NULL && data->abbrev.asection != NULL); |
c906108c SS |
1113 | } |
1114 | ||
233a11ab CS |
1115 | /* When loading sections, we can either look for ".<name>", or for |
1116 | * ".z<name>", which indicates a compressed section. */ | |
1117 | ||
1118 | static int | |
dce234bc | 1119 | section_is_p (const char *section_name, const char *name) |
233a11ab | 1120 | { |
dce234bc PP |
1121 | return (section_name[0] == '.' |
1122 | && (strcmp (section_name + 1, name) == 0 | |
1123 | || (section_name[1] == 'z' | |
1124 | && strcmp (section_name + 2, name) == 0))); | |
233a11ab CS |
1125 | } |
1126 | ||
c906108c SS |
1127 | /* This function is mapped across the sections and remembers the |
1128 | offset and size of each of the debugging sections we are interested | |
1129 | in. */ | |
1130 | ||
1131 | static void | |
72dca2f5 | 1132 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr) |
c906108c | 1133 | { |
dce234bc | 1134 | if (section_is_p (sectp->name, INFO_SECTION)) |
c906108c | 1135 | { |
dce234bc PP |
1136 | dwarf2_per_objfile->info.asection = sectp; |
1137 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1138 | } |
dce234bc | 1139 | else if (section_is_p (sectp->name, ABBREV_SECTION)) |
c906108c | 1140 | { |
dce234bc PP |
1141 | dwarf2_per_objfile->abbrev.asection = sectp; |
1142 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1143 | } |
dce234bc | 1144 | else if (section_is_p (sectp->name, LINE_SECTION)) |
c906108c | 1145 | { |
dce234bc PP |
1146 | dwarf2_per_objfile->line.asection = sectp; |
1147 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1148 | } |
dce234bc | 1149 | else if (section_is_p (sectp->name, PUBNAMES_SECTION)) |
c906108c | 1150 | { |
dce234bc PP |
1151 | dwarf2_per_objfile->pubnames.asection = sectp; |
1152 | dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp); | |
c906108c | 1153 | } |
dce234bc | 1154 | else if (section_is_p (sectp->name, ARANGES_SECTION)) |
c906108c | 1155 | { |
dce234bc PP |
1156 | dwarf2_per_objfile->aranges.asection = sectp; |
1157 | dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp); | |
c906108c | 1158 | } |
dce234bc | 1159 | else if (section_is_p (sectp->name, LOC_SECTION)) |
c906108c | 1160 | { |
dce234bc PP |
1161 | dwarf2_per_objfile->loc.asection = sectp; |
1162 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1163 | } |
dce234bc | 1164 | else if (section_is_p (sectp->name, MACINFO_SECTION)) |
c906108c | 1165 | { |
dce234bc PP |
1166 | dwarf2_per_objfile->macinfo.asection = sectp; |
1167 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1168 | } |
dce234bc | 1169 | else if (section_is_p (sectp->name, STR_SECTION)) |
c906108c | 1170 | { |
dce234bc PP |
1171 | dwarf2_per_objfile->str.asection = sectp; |
1172 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1173 | } |
dce234bc | 1174 | else if (section_is_p (sectp->name, FRAME_SECTION)) |
b6af0555 | 1175 | { |
dce234bc PP |
1176 | dwarf2_per_objfile->frame.asection = sectp; |
1177 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1178 | } |
dce234bc | 1179 | else if (section_is_p (sectp->name, EH_FRAME_SECTION)) |
b6af0555 | 1180 | { |
3799ccc6 EZ |
1181 | flagword aflag = bfd_get_section_flags (ignore_abfd, sectp); |
1182 | if (aflag & SEC_HAS_CONTENTS) | |
1183 | { | |
dce234bc PP |
1184 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1185 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
3799ccc6 | 1186 | } |
b6af0555 | 1187 | } |
dce234bc | 1188 | else if (section_is_p (sectp->name, RANGES_SECTION)) |
af34e669 | 1189 | { |
dce234bc PP |
1190 | dwarf2_per_objfile->ranges.asection = sectp; |
1191 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 1192 | } |
dce234bc | 1193 | |
72dca2f5 FR |
1194 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
1195 | && bfd_section_vma (abfd, sectp) == 0) | |
1196 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1197 | } |
1198 | ||
dce234bc PP |
1199 | /* Decompress a section that was compressed using zlib. Store the |
1200 | decompressed buffer, and its size, in OUTBUF and OUTSIZE. */ | |
233a11ab CS |
1201 | |
1202 | static void | |
dce234bc PP |
1203 | zlib_decompress_section (struct objfile *objfile, asection *sectp, |
1204 | gdb_byte **outbuf, bfd_size_type *outsize) | |
1205 | { | |
1206 | bfd *abfd = objfile->obfd; | |
1207 | #ifndef HAVE_ZLIB_H | |
1208 | error (_("Support for zlib-compressed DWARF data (from '%s') " | |
1209 | "is disabled in this copy of GDB"), | |
1210 | bfd_get_filename (abfd)); | |
1211 | #else | |
1212 | bfd_size_type compressed_size = bfd_get_section_size (sectp); | |
1213 | gdb_byte *compressed_buffer = xmalloc (compressed_size); | |
affddf13 | 1214 | struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer); |
dce234bc PP |
1215 | bfd_size_type uncompressed_size; |
1216 | gdb_byte *uncompressed_buffer; | |
1217 | z_stream strm; | |
1218 | int rc; | |
1219 | int header_size = 12; | |
1220 | ||
1221 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1222 | || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size) | |
1223 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1224 | bfd_get_filename (abfd)); | |
1225 | ||
1226 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
1227 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
1228 | if (compressed_size < header_size | |
1229 | || strncmp (compressed_buffer, "ZLIB", 4) != 0) | |
1230 | error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"), | |
1231 | bfd_get_filename (abfd)); | |
1232 | uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8; | |
1233 | uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8; | |
1234 | uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8; | |
1235 | uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8; | |
1236 | uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8; | |
1237 | uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8; | |
1238 | uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8; | |
1239 | uncompressed_size += compressed_buffer[11]; | |
1240 | ||
1241 | /* It is possible the section consists of several compressed | |
1242 | buffers concatenated together, so we uncompress in a loop. */ | |
1243 | strm.zalloc = NULL; | |
1244 | strm.zfree = NULL; | |
1245 | strm.opaque = NULL; | |
1246 | strm.avail_in = compressed_size - header_size; | |
1247 | strm.next_in = (Bytef*) compressed_buffer + header_size; | |
1248 | strm.avail_out = uncompressed_size; | |
1249 | uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack, | |
1250 | uncompressed_size); | |
1251 | rc = inflateInit (&strm); | |
1252 | while (strm.avail_in > 0) | |
1253 | { | |
1254 | if (rc != Z_OK) | |
1255 | error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"), | |
1256 | bfd_get_filename (abfd), rc); | |
1257 | strm.next_out = ((Bytef*) uncompressed_buffer | |
1258 | + (uncompressed_size - strm.avail_out)); | |
1259 | rc = inflate (&strm, Z_FINISH); | |
1260 | if (rc != Z_STREAM_END) | |
1261 | error (_("Dwarf Error: zlib error uncompressing from '%s': %d"), | |
1262 | bfd_get_filename (abfd), rc); | |
1263 | rc = inflateReset (&strm); | |
1264 | } | |
1265 | rc = inflateEnd (&strm); | |
1266 | if (rc != Z_OK | |
1267 | || strm.avail_out != 0) | |
1268 | error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"), | |
1269 | bfd_get_filename (abfd), rc); | |
1270 | ||
affddf13 | 1271 | do_cleanups (cleanup); |
dce234bc PP |
1272 | *outbuf = uncompressed_buffer; |
1273 | *outsize = uncompressed_size; | |
1274 | #endif | |
233a11ab CS |
1275 | } |
1276 | ||
dce234bc PP |
1277 | /* Read the contents of the section SECTP from object file specified by |
1278 | OBJFILE, store info about the section into INFO. | |
1279 | If the section is compressed, uncompress it before returning. */ | |
c906108c | 1280 | |
dce234bc PP |
1281 | static void |
1282 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 1283 | { |
dce234bc PP |
1284 | bfd *abfd = objfile->obfd; |
1285 | asection *sectp = info->asection; | |
1286 | gdb_byte *buf, *retbuf; | |
1287 | unsigned char header[4]; | |
c906108c | 1288 | |
dce234bc PP |
1289 | info->buffer = NULL; |
1290 | info->was_mmapped = 0; | |
188dd5d6 | 1291 | |
dce234bc PP |
1292 | if (info->asection == NULL || info->size == 0) |
1293 | return; | |
c906108c | 1294 | |
dce234bc PP |
1295 | /* Check if the file has a 4-byte header indicating compression. */ |
1296 | if (info->size > sizeof (header) | |
1297 | && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0 | |
1298 | && bfd_bread (header, sizeof (header), abfd) == sizeof (header)) | |
1299 | { | |
1300 | /* Upon decompression, update the buffer and its size. */ | |
1301 | if (strncmp (header, "ZLIB", sizeof (header)) == 0) | |
1302 | { | |
1303 | zlib_decompress_section (objfile, sectp, &info->buffer, | |
1304 | &info->size); | |
1305 | return; | |
1306 | } | |
1307 | } | |
4bdf3d34 | 1308 | |
dce234bc PP |
1309 | #ifdef HAVE_MMAP |
1310 | if (pagesize == 0) | |
1311 | pagesize = getpagesize (); | |
2e276125 | 1312 | |
dce234bc PP |
1313 | /* Only try to mmap sections which are large enough: we don't want to |
1314 | waste space due to fragmentation. Also, only try mmap for sections | |
1315 | without relocations. */ | |
1316 | ||
1317 | if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0) | |
1318 | { | |
1319 | off_t pg_offset = sectp->filepos & ~(pagesize - 1); | |
1320 | size_t map_length = info->size + sectp->filepos - pg_offset; | |
1321 | caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ, | |
1322 | MAP_PRIVATE, pg_offset); | |
1323 | ||
1324 | if (retbuf != MAP_FAILED) | |
1325 | { | |
1326 | info->was_mmapped = 1; | |
1327 | info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ; | |
1328 | return; | |
1329 | } | |
1330 | } | |
1331 | #endif | |
1332 | ||
1333 | /* If we get here, we are a normal, not-compressed section. */ | |
1334 | info->buffer = buf | |
1335 | = obstack_alloc (&objfile->objfile_obstack, info->size); | |
1336 | ||
1337 | /* When debugging .o files, we may need to apply relocations; see | |
1338 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
1339 | We never compress sections in .o files, so we only need to | |
1340 | try this when the section is not compressed. */ | |
1341 | retbuf = symfile_relocate_debug_section (abfd, sectp, buf); | |
1342 | if (retbuf != NULL) | |
1343 | { | |
1344 | info->buffer = retbuf; | |
1345 | return; | |
1346 | } | |
1347 | ||
1348 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1349 | || bfd_bread (buf, info->size, abfd) != info->size) | |
1350 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1351 | bfd_get_filename (abfd)); | |
1352 | } | |
1353 | ||
1354 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and | |
1355 | SECTION_NAME. */ | |
af34e669 | 1356 | |
dce234bc PP |
1357 | void |
1358 | dwarf2_get_section_info (struct objfile *objfile, const char *section_name, | |
1359 | asection **sectp, gdb_byte **bufp, | |
1360 | bfd_size_type *sizep) | |
1361 | { | |
1362 | struct dwarf2_per_objfile *data | |
1363 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
1364 | struct dwarf2_section_info *info; | |
1365 | if (section_is_p (section_name, EH_FRAME_SECTION)) | |
1366 | info = &data->eh_frame; | |
1367 | else if (section_is_p (section_name, FRAME_SECTION)) | |
1368 | info = &data->frame; | |
0d53c4c4 | 1369 | else |
dce234bc PP |
1370 | gdb_assert (0); |
1371 | ||
1372 | if (info->asection != NULL && info->size != 0 && info->buffer == NULL) | |
1373 | /* We haven't read this section in yet. Do it now. */ | |
1374 | dwarf2_read_section (objfile, info); | |
1375 | ||
1376 | *sectp = info->asection; | |
1377 | *bufp = info->buffer; | |
1378 | *sizep = info->size; | |
1379 | } | |
1380 | ||
1381 | /* Build a partial symbol table. */ | |
1382 | ||
1383 | void | |
1384 | dwarf2_build_psymtabs (struct objfile *objfile, int mainline) | |
1385 | { | |
1386 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); | |
1387 | dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev); | |
1388 | dwarf2_read_section (objfile, &dwarf2_per_objfile->line); | |
1389 | dwarf2_read_section (objfile, &dwarf2_per_objfile->str); | |
1390 | dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo); | |
1391 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); | |
1392 | dwarf2_read_section (objfile, &dwarf2_per_objfile->loc); | |
1393 | dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame); | |
1394 | dwarf2_read_section (objfile, &dwarf2_per_objfile->frame); | |
0d53c4c4 | 1395 | |
ef96bde8 EZ |
1396 | if (mainline |
1397 | || (objfile->global_psymbols.size == 0 | |
1398 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
1399 | { |
1400 | init_psymbol_list (objfile, 1024); | |
1401 | } | |
1402 | ||
1403 | #if 0 | |
1404 | if (dwarf_aranges_offset && dwarf_pubnames_offset) | |
1405 | { | |
d4f3574e | 1406 | /* Things are significantly easier if we have .debug_aranges and |
c906108c SS |
1407 | .debug_pubnames sections */ |
1408 | ||
d4f3574e | 1409 | dwarf2_build_psymtabs_easy (objfile, mainline); |
c906108c SS |
1410 | } |
1411 | else | |
1412 | #endif | |
1413 | /* only test this case for now */ | |
c5aa993b | 1414 | { |
c906108c | 1415 | /* In this case we have to work a bit harder */ |
d4f3574e | 1416 | dwarf2_build_psymtabs_hard (objfile, mainline); |
c906108c SS |
1417 | } |
1418 | } | |
1419 | ||
1420 | #if 0 | |
1421 | /* Build the partial symbol table from the information in the | |
1422 | .debug_pubnames and .debug_aranges sections. */ | |
1423 | ||
1424 | static void | |
fba45db2 | 1425 | dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) |
c906108c SS |
1426 | { |
1427 | bfd *abfd = objfile->obfd; | |
1428 | char *aranges_buffer, *pubnames_buffer; | |
1429 | char *aranges_ptr, *pubnames_ptr; | |
1430 | unsigned int entry_length, version, info_offset, info_size; | |
1431 | ||
1432 | pubnames_buffer = dwarf2_read_section (objfile, | |
086df311 | 1433 | dwarf_pubnames_section); |
c906108c | 1434 | pubnames_ptr = pubnames_buffer; |
dce234bc | 1435 | while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size) |
c906108c | 1436 | { |
891d2f0b | 1437 | unsigned int bytes_read; |
613e1657 | 1438 | |
c764a876 | 1439 | entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read); |
613e1657 | 1440 | pubnames_ptr += bytes_read; |
c906108c SS |
1441 | version = read_1_byte (abfd, pubnames_ptr); |
1442 | pubnames_ptr += 1; | |
1443 | info_offset = read_4_bytes (abfd, pubnames_ptr); | |
1444 | pubnames_ptr += 4; | |
1445 | info_size = read_4_bytes (abfd, pubnames_ptr); | |
1446 | pubnames_ptr += 4; | |
1447 | } | |
1448 | ||
1449 | aranges_buffer = dwarf2_read_section (objfile, | |
086df311 | 1450 | dwarf_aranges_section); |
c906108c SS |
1451 | |
1452 | } | |
1453 | #endif | |
1454 | ||
45452591 DE |
1455 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
1456 | ||
1457 | static inline int | |
1458 | offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset) | |
1459 | { | |
1460 | unsigned int bottom = cu_header->offset; | |
1461 | unsigned int top = (cu_header->offset | |
1462 | + cu_header->length | |
1463 | + cu_header->initial_length_size); | |
1464 | return (offset >= bottom && offset < top); | |
1465 | } | |
1466 | ||
107d2387 | 1467 | /* Read in the comp unit header information from the debug_info at |
917c78fc | 1468 | info_ptr. */ |
107d2387 | 1469 | |
fe1b8b76 | 1470 | static gdb_byte * |
107d2387 | 1471 | read_comp_unit_head (struct comp_unit_head *cu_header, |
fe1b8b76 | 1472 | gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
1473 | { |
1474 | int signed_addr; | |
891d2f0b | 1475 | unsigned int bytes_read; |
c764a876 DE |
1476 | |
1477 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
1478 | cu_header->initial_length_size = bytes_read; | |
1479 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 1480 | info_ptr += bytes_read; |
107d2387 AC |
1481 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1482 | info_ptr += 2; | |
613e1657 | 1483 | cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, |
c764a876 | 1484 | &bytes_read); |
613e1657 | 1485 | info_ptr += bytes_read; |
107d2387 AC |
1486 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
1487 | info_ptr += 1; | |
1488 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
1489 | if (signed_addr < 0) | |
8e65ff28 | 1490 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1491 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 1492 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 1493 | |
107d2387 AC |
1494 | return info_ptr; |
1495 | } | |
1496 | ||
fe1b8b76 JB |
1497 | static gdb_byte * |
1498 | partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr, | |
72bf9492 DJ |
1499 | bfd *abfd) |
1500 | { | |
fe1b8b76 | 1501 | gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 DJ |
1502 | |
1503 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); | |
1504 | ||
2b949cb6 | 1505 | if (header->version != 2 && header->version != 3) |
8a3fe4f8 AC |
1506 | error (_("Dwarf Error: wrong version in compilation unit header " |
1507 | "(is %d, should be %d) [in module %s]"), header->version, | |
72bf9492 DJ |
1508 | 2, bfd_get_filename (abfd)); |
1509 | ||
dce234bc | 1510 | if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size) |
8a3fe4f8 AC |
1511 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
1512 | "(offset 0x%lx + 6) [in module %s]"), | |
72bf9492 | 1513 | (long) header->abbrev_offset, |
dce234bc | 1514 | (long) (beg_of_comp_unit - dwarf2_per_objfile->info.buffer), |
72bf9492 DJ |
1515 | bfd_get_filename (abfd)); |
1516 | ||
1517 | if (beg_of_comp_unit + header->length + header->initial_length_size | |
dce234bc | 1518 | > dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size) |
8a3fe4f8 AC |
1519 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " |
1520 | "(offset 0x%lx + 0) [in module %s]"), | |
72bf9492 | 1521 | (long) header->length, |
dce234bc | 1522 | (long) (beg_of_comp_unit - dwarf2_per_objfile->info.buffer), |
72bf9492 DJ |
1523 | bfd_get_filename (abfd)); |
1524 | ||
1525 | return info_ptr; | |
1526 | } | |
1527 | ||
aaa75496 JB |
1528 | /* Allocate a new partial symtab for file named NAME and mark this new |
1529 | partial symtab as being an include of PST. */ | |
1530 | ||
1531 | static void | |
1532 | dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst, | |
1533 | struct objfile *objfile) | |
1534 | { | |
1535 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
1536 | ||
1537 | subpst->section_offsets = pst->section_offsets; | |
1538 | subpst->textlow = 0; | |
1539 | subpst->texthigh = 0; | |
1540 | ||
1541 | subpst->dependencies = (struct partial_symtab **) | |
1542 | obstack_alloc (&objfile->objfile_obstack, | |
1543 | sizeof (struct partial_symtab *)); | |
1544 | subpst->dependencies[0] = pst; | |
1545 | subpst->number_of_dependencies = 1; | |
1546 | ||
1547 | subpst->globals_offset = 0; | |
1548 | subpst->n_global_syms = 0; | |
1549 | subpst->statics_offset = 0; | |
1550 | subpst->n_static_syms = 0; | |
1551 | subpst->symtab = NULL; | |
1552 | subpst->read_symtab = pst->read_symtab; | |
1553 | subpst->readin = 0; | |
1554 | ||
1555 | /* No private part is necessary for include psymtabs. This property | |
1556 | can be used to differentiate between such include psymtabs and | |
10b3939b | 1557 | the regular ones. */ |
58a9656e | 1558 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
1559 | } |
1560 | ||
1561 | /* Read the Line Number Program data and extract the list of files | |
1562 | included by the source file represented by PST. Build an include | |
1563 | partial symtab for each of these included files. | |
1564 | ||
1565 | This procedure assumes that there *is* a Line Number Program in | |
1566 | the given CU. Callers should check that PDI->HAS_STMT_LIST is set | |
1567 | before calling this procedure. */ | |
1568 | ||
1569 | static void | |
1570 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
1571 | struct partial_die_info *pdi, | |
1572 | struct partial_symtab *pst) | |
1573 | { | |
1574 | struct objfile *objfile = cu->objfile; | |
1575 | bfd *abfd = objfile->obfd; | |
1576 | struct line_header *lh; | |
1577 | ||
1578 | lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu); | |
1579 | if (lh == NULL) | |
1580 | return; /* No linetable, so no includes. */ | |
1581 | ||
1582 | dwarf_decode_lines (lh, NULL, abfd, cu, pst); | |
1583 | ||
1584 | free_line_header (lh); | |
1585 | } | |
1586 | ||
1587 | ||
c906108c SS |
1588 | /* Build the partial symbol table by doing a quick pass through the |
1589 | .debug_info and .debug_abbrev sections. */ | |
1590 | ||
1591 | static void | |
fba45db2 | 1592 | dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) |
c906108c SS |
1593 | { |
1594 | /* Instead of reading this into a big buffer, we should probably use | |
1595 | mmap() on architectures that support it. (FIXME) */ | |
1596 | bfd *abfd = objfile->obfd; | |
fe1b8b76 JB |
1597 | gdb_byte *info_ptr; |
1598 | gdb_byte *beg_of_comp_unit; | |
c906108c SS |
1599 | struct partial_die_info comp_unit_die; |
1600 | struct partial_symtab *pst; | |
ae038cb0 | 1601 | struct cleanup *back_to; |
5734ee8b | 1602 | CORE_ADDR baseaddr; |
c906108c | 1603 | |
dce234bc | 1604 | info_ptr = dwarf2_per_objfile->info.buffer; |
c906108c | 1605 | |
ae038cb0 DJ |
1606 | /* Any cached compilation units will be linked by the per-objfile |
1607 | read_in_chain. Make sure to free them when we're done. */ | |
1608 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
1609 | ||
10b3939b DJ |
1610 | create_all_comp_units (objfile); |
1611 | ||
ff013f42 JK |
1612 | objfile->psymtabs_addrmap = addrmap_create_mutable |
1613 | (&objfile->objfile_obstack); | |
1614 | ||
6502dd73 | 1615 | /* Since the objects we're extracting from .debug_info vary in |
af703f96 | 1616 | length, only the individual functions to extract them (like |
72bf9492 | 1617 | read_comp_unit_head and load_partial_die) can really know whether |
af703f96 JB |
1618 | the buffer is large enough to hold another complete object. |
1619 | ||
6502dd73 DJ |
1620 | At the moment, they don't actually check that. If .debug_info |
1621 | holds just one extra byte after the last compilation unit's dies, | |
1622 | then read_comp_unit_head will happily read off the end of the | |
1623 | buffer. read_partial_die is similarly casual. Those functions | |
1624 | should be fixed. | |
af703f96 JB |
1625 | |
1626 | For this loop condition, simply checking whether there's any data | |
1627 | left at all should be sufficient. */ | |
dce234bc PP |
1628 | while (info_ptr < (dwarf2_per_objfile->info.buffer |
1629 | + dwarf2_per_objfile->info.size)) | |
c906108c | 1630 | { |
f3dd6933 | 1631 | struct cleanup *back_to_inner; |
e7c27a73 | 1632 | struct dwarf2_cu cu; |
72bf9492 DJ |
1633 | struct abbrev_info *abbrev; |
1634 | unsigned int bytes_read; | |
1635 | struct dwarf2_per_cu_data *this_cu; | |
1636 | ||
c906108c | 1637 | beg_of_comp_unit = info_ptr; |
c906108c | 1638 | |
72bf9492 DJ |
1639 | memset (&cu, 0, sizeof (cu)); |
1640 | ||
1641 | obstack_init (&cu.comp_unit_obstack); | |
1642 | ||
1643 | back_to_inner = make_cleanup (free_stack_comp_unit, &cu); | |
1644 | ||
e7c27a73 | 1645 | cu.objfile = objfile; |
72bf9492 | 1646 | info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd); |
e7c27a73 | 1647 | |
57349743 | 1648 | /* Complete the cu_header */ |
dce234bc | 1649 | cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info.buffer; |
d00adf39 | 1650 | cu.header.first_die_offset = info_ptr - beg_of_comp_unit; |
57349743 | 1651 | |
e142c38c DJ |
1652 | cu.list_in_scope = &file_symbols; |
1653 | ||
c906108c | 1654 | /* Read the abbrevs for this compilation unit into a table */ |
e7c27a73 | 1655 | dwarf2_read_abbrevs (abfd, &cu); |
72bf9492 | 1656 | make_cleanup (dwarf2_free_abbrev_table, &cu); |
c906108c | 1657 | |
10b3939b | 1658 | this_cu = dwarf2_find_comp_unit (cu.header.offset, objfile); |
ae038cb0 | 1659 | |
c906108c | 1660 | /* Read the compilation unit die */ |
72bf9492 DJ |
1661 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu); |
1662 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
1663 | abfd, info_ptr, &cu); | |
c906108c | 1664 | |
31ffec48 DJ |
1665 | if (comp_unit_die.tag == DW_TAG_partial_unit) |
1666 | { | |
1667 | info_ptr = (beg_of_comp_unit + cu.header.length | |
1668 | + cu.header.initial_length_size); | |
1669 | do_cleanups (back_to_inner); | |
1670 | continue; | |
1671 | } | |
1672 | ||
c906108c | 1673 | /* Set the language we're debugging */ |
e142c38c | 1674 | set_cu_language (comp_unit_die.language, &cu); |
c906108c SS |
1675 | |
1676 | /* Allocate a new partial symbol table structure */ | |
d4f3574e | 1677 | pst = start_psymtab_common (objfile, objfile->section_offsets, |
96baa820 | 1678 | comp_unit_die.name ? comp_unit_die.name : "", |
ff013f42 JK |
1679 | /* TEXTLOW and TEXTHIGH are set below. */ |
1680 | 0, | |
c906108c SS |
1681 | objfile->global_psymbols.next, |
1682 | objfile->static_psymbols.next); | |
1683 | ||
ae038cb0 | 1684 | if (comp_unit_die.dirname) |
a683b3c0 TT |
1685 | pst->dirname = obsavestring (comp_unit_die.dirname, |
1686 | strlen (comp_unit_die.dirname), | |
1687 | &objfile->objfile_obstack); | |
57c22c6c | 1688 | |
10b3939b DJ |
1689 | pst->read_symtab_private = (char *) this_cu; |
1690 | ||
613e1657 | 1691 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
1692 | |
1693 | /* Store the function that reads in the rest of the symbol table */ | |
1694 | pst->read_symtab = dwarf2_psymtab_to_symtab; | |
1695 | ||
10b3939b DJ |
1696 | /* If this compilation unit was already read in, free the |
1697 | cached copy in order to read it in again. This is | |
1698 | necessary because we skipped some symbols when we first | |
1699 | read in the compilation unit (see load_partial_dies). | |
1700 | This problem could be avoided, but the benefit is | |
1701 | unclear. */ | |
1702 | if (this_cu->cu != NULL) | |
1703 | free_one_cached_comp_unit (this_cu->cu); | |
ae038cb0 | 1704 | |
10b3939b | 1705 | cu.per_cu = this_cu; |
ae038cb0 | 1706 | |
10b3939b DJ |
1707 | /* Note that this is a pointer to our stack frame, being |
1708 | added to a global data structure. It will be cleaned up | |
1709 | in free_stack_comp_unit when we finish with this | |
1710 | compilation unit. */ | |
1711 | this_cu->cu = &cu; | |
ae038cb0 | 1712 | |
10b3939b | 1713 | this_cu->psymtab = pst; |
ae038cb0 | 1714 | |
ff013f42 JK |
1715 | /* Possibly set the default values of LOWPC and HIGHPC from |
1716 | `DW_AT_ranges'. */ | |
1717 | if (cu.has_ranges_offset) | |
1718 | { | |
1719 | if (dwarf2_ranges_read (cu.ranges_offset, &comp_unit_die.lowpc, | |
1720 | &comp_unit_die.highpc, &cu, pst)) | |
1721 | comp_unit_die.has_pc_info = 1; | |
1722 | } | |
5734ee8b DJ |
1723 | else if (comp_unit_die.has_pc_info |
1724 | && comp_unit_die.lowpc < comp_unit_die.highpc) | |
1725 | /* Store the contiguous range if it is not empty; it can be empty for | |
1726 | CUs with no code. */ | |
1727 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
1728 | comp_unit_die.lowpc + baseaddr, | |
1729 | comp_unit_die.highpc + baseaddr - 1, pst); | |
ff013f42 | 1730 | |
c906108c SS |
1731 | /* Check if comp unit has_children. |
1732 | If so, read the rest of the partial symbols from this comp unit. | |
1733 | If not, there's no more debug_info for this comp unit. */ | |
1734 | if (comp_unit_die.has_children) | |
1735 | { | |
72bf9492 | 1736 | struct partial_die_info *first_die; |
5734ee8b | 1737 | CORE_ADDR lowpc, highpc; |
72bf9492 | 1738 | |
91c24f0a DC |
1739 | lowpc = ((CORE_ADDR) -1); |
1740 | highpc = ((CORE_ADDR) 0); | |
1741 | ||
72bf9492 DJ |
1742 | first_die = load_partial_dies (abfd, info_ptr, 1, &cu); |
1743 | ||
5734ee8b DJ |
1744 | scan_partial_symbols (first_die, &lowpc, &highpc, |
1745 | ! comp_unit_die.has_pc_info, &cu); | |
c906108c | 1746 | |
91c24f0a DC |
1747 | /* If we didn't find a lowpc, set it to highpc to avoid |
1748 | complaints from `maint check'. */ | |
1749 | if (lowpc == ((CORE_ADDR) -1)) | |
1750 | lowpc = highpc; | |
72bf9492 | 1751 | |
c906108c SS |
1752 | /* If the compilation unit didn't have an explicit address range, |
1753 | then use the information extracted from its child dies. */ | |
0b010bcc | 1754 | if (! comp_unit_die.has_pc_info) |
c906108c | 1755 | { |
c5aa993b | 1756 | comp_unit_die.lowpc = lowpc; |
c906108c SS |
1757 | comp_unit_die.highpc = highpc; |
1758 | } | |
1759 | } | |
c5aa993b | 1760 | pst->textlow = comp_unit_die.lowpc + baseaddr; |
c906108c SS |
1761 | pst->texthigh = comp_unit_die.highpc + baseaddr; |
1762 | ||
1763 | pst->n_global_syms = objfile->global_psymbols.next - | |
1764 | (objfile->global_psymbols.list + pst->globals_offset); | |
1765 | pst->n_static_syms = objfile->static_psymbols.next - | |
1766 | (objfile->static_psymbols.list + pst->statics_offset); | |
1767 | sort_pst_symbols (pst); | |
1768 | ||
1769 | /* If there is already a psymtab or symtab for a file of this | |
1770 | name, remove it. (If there is a symtab, more drastic things | |
1771 | also happen.) This happens in VxWorks. */ | |
1772 | free_named_symtabs (pst->filename); | |
1773 | ||
dd373385 EZ |
1774 | info_ptr = beg_of_comp_unit + cu.header.length |
1775 | + cu.header.initial_length_size; | |
1776 | ||
aaa75496 JB |
1777 | if (comp_unit_die.has_stmt_list) |
1778 | { | |
1779 | /* Get the list of files included in the current compilation unit, | |
1780 | and build a psymtab for each of them. */ | |
1781 | dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst); | |
1782 | } | |
1783 | ||
f3dd6933 | 1784 | do_cleanups (back_to_inner); |
c906108c | 1785 | } |
ff013f42 JK |
1786 | |
1787 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, | |
1788 | &objfile->objfile_obstack); | |
1789 | ||
ae038cb0 DJ |
1790 | do_cleanups (back_to); |
1791 | } | |
1792 | ||
1793 | /* Load the DIEs for a secondary CU into memory. */ | |
1794 | ||
1795 | static void | |
1796 | load_comp_unit (struct dwarf2_per_cu_data *this_cu, struct objfile *objfile) | |
1797 | { | |
1798 | bfd *abfd = objfile->obfd; | |
fe1b8b76 | 1799 | gdb_byte *info_ptr, *beg_of_comp_unit; |
ae038cb0 DJ |
1800 | struct partial_die_info comp_unit_die; |
1801 | struct dwarf2_cu *cu; | |
1802 | struct abbrev_info *abbrev; | |
1803 | unsigned int bytes_read; | |
1804 | struct cleanup *back_to; | |
1805 | ||
dce234bc | 1806 | info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset; |
ae038cb0 DJ |
1807 | beg_of_comp_unit = info_ptr; |
1808 | ||
1809 | cu = xmalloc (sizeof (struct dwarf2_cu)); | |
1810 | memset (cu, 0, sizeof (struct dwarf2_cu)); | |
1811 | ||
1812 | obstack_init (&cu->comp_unit_obstack); | |
1813 | ||
1814 | cu->objfile = objfile; | |
1815 | info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd); | |
1816 | ||
1817 | /* Complete the cu_header. */ | |
dce234bc | 1818 | cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info.buffer; |
d00adf39 | 1819 | cu->header.first_die_offset = info_ptr - beg_of_comp_unit; |
ae038cb0 DJ |
1820 | |
1821 | /* Read the abbrevs for this compilation unit into a table. */ | |
1822 | dwarf2_read_abbrevs (abfd, cu); | |
1823 | back_to = make_cleanup (dwarf2_free_abbrev_table, cu); | |
1824 | ||
1825 | /* Read the compilation unit die. */ | |
1826 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
1827 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
1828 | abfd, info_ptr, cu); | |
1829 | ||
1830 | /* Set the language we're debugging. */ | |
1831 | set_cu_language (comp_unit_die.language, cu); | |
1832 | ||
1833 | /* Link this compilation unit into the compilation unit tree. */ | |
1834 | this_cu->cu = cu; | |
1835 | cu->per_cu = this_cu; | |
f792889a | 1836 | cu->type_hash = cu->per_cu->type_hash; |
ae038cb0 DJ |
1837 | |
1838 | /* Check if comp unit has_children. | |
1839 | If so, read the rest of the partial symbols from this comp unit. | |
1840 | If not, there's no more debug_info for this comp unit. */ | |
1841 | if (comp_unit_die.has_children) | |
1842 | load_partial_dies (abfd, info_ptr, 0, cu); | |
1843 | ||
1844 | do_cleanups (back_to); | |
1845 | } | |
1846 | ||
1847 | /* Create a list of all compilation units in OBJFILE. We do this only | |
1848 | if an inter-comp-unit reference is found; presumably if there is one, | |
1849 | there will be many, and one will occur early in the .debug_info section. | |
1850 | So there's no point in building this list incrementally. */ | |
1851 | ||
1852 | static void | |
1853 | create_all_comp_units (struct objfile *objfile) | |
1854 | { | |
1855 | int n_allocated; | |
1856 | int n_comp_units; | |
1857 | struct dwarf2_per_cu_data **all_comp_units; | |
dce234bc | 1858 | gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer; |
ae038cb0 DJ |
1859 | |
1860 | n_comp_units = 0; | |
1861 | n_allocated = 10; | |
1862 | all_comp_units = xmalloc (n_allocated | |
1863 | * sizeof (struct dwarf2_per_cu_data *)); | |
1864 | ||
dce234bc | 1865 | while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size) |
ae038cb0 | 1866 | { |
c764a876 | 1867 | unsigned int length, initial_length_size; |
fe1b8b76 | 1868 | gdb_byte *beg_of_comp_unit; |
ae038cb0 | 1869 | struct dwarf2_per_cu_data *this_cu; |
c764a876 | 1870 | unsigned int offset; |
ae038cb0 | 1871 | |
dce234bc | 1872 | offset = info_ptr - dwarf2_per_objfile->info.buffer; |
ae038cb0 DJ |
1873 | |
1874 | /* Read just enough information to find out where the next | |
1875 | compilation unit is. */ | |
c764a876 DE |
1876 | length = read_initial_length (objfile->obfd, info_ptr, |
1877 | &initial_length_size); | |
ae038cb0 DJ |
1878 | |
1879 | /* Save the compilation unit for later lookup. */ | |
1880 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
1881 | sizeof (struct dwarf2_per_cu_data)); | |
1882 | memset (this_cu, 0, sizeof (*this_cu)); | |
1883 | this_cu->offset = offset; | |
c764a876 | 1884 | this_cu->length = length + initial_length_size; |
ae038cb0 DJ |
1885 | |
1886 | if (n_comp_units == n_allocated) | |
1887 | { | |
1888 | n_allocated *= 2; | |
1889 | all_comp_units = xrealloc (all_comp_units, | |
1890 | n_allocated | |
1891 | * sizeof (struct dwarf2_per_cu_data *)); | |
1892 | } | |
1893 | all_comp_units[n_comp_units++] = this_cu; | |
1894 | ||
1895 | info_ptr = info_ptr + this_cu->length; | |
1896 | } | |
1897 | ||
1898 | dwarf2_per_objfile->all_comp_units | |
1899 | = obstack_alloc (&objfile->objfile_obstack, | |
1900 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
1901 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
1902 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
1903 | xfree (all_comp_units); | |
1904 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
1905 | } |
1906 | ||
5734ee8b DJ |
1907 | /* Process all loaded DIEs for compilation unit CU, starting at |
1908 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
1909 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
1910 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
1911 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
1912 | and record the covered ranges in the addrmap. */ | |
c906108c | 1913 | |
72bf9492 DJ |
1914 | static void |
1915 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 1916 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 1917 | { |
e7c27a73 | 1918 | struct objfile *objfile = cu->objfile; |
c906108c | 1919 | bfd *abfd = objfile->obfd; |
72bf9492 | 1920 | struct partial_die_info *pdi; |
c906108c | 1921 | |
91c24f0a DC |
1922 | /* Now, march along the PDI's, descending into ones which have |
1923 | interesting children but skipping the children of the other ones, | |
1924 | until we reach the end of the compilation unit. */ | |
c906108c | 1925 | |
72bf9492 | 1926 | pdi = first_die; |
91c24f0a | 1927 | |
72bf9492 DJ |
1928 | while (pdi != NULL) |
1929 | { | |
1930 | fixup_partial_die (pdi, cu); | |
c906108c | 1931 | |
91c24f0a DC |
1932 | /* Anonymous namespaces have no name but have interesting |
1933 | children, so we need to look at them. Ditto for anonymous | |
1934 | enums. */ | |
933c6fe4 | 1935 | |
72bf9492 DJ |
1936 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
1937 | || pdi->tag == DW_TAG_enumeration_type) | |
c906108c | 1938 | { |
72bf9492 | 1939 | switch (pdi->tag) |
c906108c SS |
1940 | { |
1941 | case DW_TAG_subprogram: | |
5734ee8b | 1942 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c SS |
1943 | break; |
1944 | case DW_TAG_variable: | |
1945 | case DW_TAG_typedef: | |
91c24f0a | 1946 | case DW_TAG_union_type: |
72bf9492 | 1947 | if (!pdi->is_declaration) |
63d06c5c | 1948 | { |
72bf9492 | 1949 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
1950 | } |
1951 | break; | |
c906108c | 1952 | case DW_TAG_class_type: |
680b30c7 | 1953 | case DW_TAG_interface_type: |
c906108c | 1954 | case DW_TAG_structure_type: |
72bf9492 | 1955 | if (!pdi->is_declaration) |
c906108c | 1956 | { |
72bf9492 | 1957 | add_partial_symbol (pdi, cu); |
c906108c SS |
1958 | } |
1959 | break; | |
91c24f0a | 1960 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
1961 | if (!pdi->is_declaration) |
1962 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
1963 | break; |
1964 | case DW_TAG_base_type: | |
a02abb62 | 1965 | case DW_TAG_subrange_type: |
c906108c | 1966 | /* File scope base type definitions are added to the partial |
c5aa993b | 1967 | symbol table. */ |
72bf9492 | 1968 | add_partial_symbol (pdi, cu); |
c906108c | 1969 | break; |
d9fa45fe | 1970 | case DW_TAG_namespace: |
5734ee8b | 1971 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 1972 | break; |
5d7cb8df JK |
1973 | case DW_TAG_module: |
1974 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
1975 | break; | |
c906108c SS |
1976 | default: |
1977 | break; | |
1978 | } | |
1979 | } | |
1980 | ||
72bf9492 DJ |
1981 | /* If the die has a sibling, skip to the sibling. */ |
1982 | ||
1983 | pdi = pdi->die_sibling; | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 1988 | |
72bf9492 | 1989 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
1990 | name is concatenated with "::" and the partial DIE's name. For |
1991 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
1992 | Enumerators are an exception; they use the scope of their parent |
1993 | enumeration type, i.e. the name of the enumeration type is not | |
1994 | prepended to the enumerator. | |
91c24f0a | 1995 | |
72bf9492 DJ |
1996 | There are two complexities. One is DW_AT_specification; in this |
1997 | case "parent" means the parent of the target of the specification, | |
1998 | instead of the direct parent of the DIE. The other is compilers | |
1999 | which do not emit DW_TAG_namespace; in this case we try to guess | |
2000 | the fully qualified name of structure types from their members' | |
2001 | linkage names. This must be done using the DIE's children rather | |
2002 | than the children of any DW_AT_specification target. We only need | |
2003 | to do this for structures at the top level, i.e. if the target of | |
2004 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
2005 | have a parent. */ | |
2006 | ||
2007 | /* Compute the scope prefix associated with PDI's parent, in | |
2008 | compilation unit CU. The result will be allocated on CU's | |
2009 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
2010 | field. NULL is returned if no prefix is necessary. */ | |
2011 | static char * | |
2012 | partial_die_parent_scope (struct partial_die_info *pdi, | |
2013 | struct dwarf2_cu *cu) | |
2014 | { | |
2015 | char *grandparent_scope; | |
2016 | struct partial_die_info *parent, *real_pdi; | |
91c24f0a | 2017 | |
72bf9492 DJ |
2018 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
2019 | then this means the parent of the specification DIE. */ | |
2020 | ||
2021 | real_pdi = pdi; | |
72bf9492 | 2022 | while (real_pdi->has_specification) |
10b3939b | 2023 | real_pdi = find_partial_die (real_pdi->spec_offset, cu); |
72bf9492 DJ |
2024 | |
2025 | parent = real_pdi->die_parent; | |
2026 | if (parent == NULL) | |
2027 | return NULL; | |
2028 | ||
2029 | if (parent->scope_set) | |
2030 | return parent->scope; | |
2031 | ||
2032 | fixup_partial_die (parent, cu); | |
2033 | ||
10b3939b | 2034 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 DJ |
2035 | |
2036 | if (parent->tag == DW_TAG_namespace | |
2037 | || parent->tag == DW_TAG_structure_type | |
2038 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 2039 | || parent->tag == DW_TAG_interface_type |
72bf9492 DJ |
2040 | || parent->tag == DW_TAG_union_type) |
2041 | { | |
2042 | if (grandparent_scope == NULL) | |
2043 | parent->scope = parent->name; | |
2044 | else | |
987504bb JJ |
2045 | parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope, |
2046 | parent->name, cu); | |
72bf9492 DJ |
2047 | } |
2048 | else if (parent->tag == DW_TAG_enumeration_type) | |
2049 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
2050 | parent->scope = grandparent_scope; | |
2051 | else | |
2052 | { | |
2053 | /* FIXME drow/2004-04-01: What should we be doing with | |
2054 | function-local names? For partial symbols, we should probably be | |
2055 | ignoring them. */ | |
2056 | complaint (&symfile_complaints, | |
e2e0b3e5 | 2057 | _("unhandled containing DIE tag %d for DIE at %d"), |
72bf9492 DJ |
2058 | parent->tag, pdi->offset); |
2059 | parent->scope = grandparent_scope; | |
c906108c SS |
2060 | } |
2061 | ||
72bf9492 DJ |
2062 | parent->scope_set = 1; |
2063 | return parent->scope; | |
2064 | } | |
2065 | ||
2066 | /* Return the fully scoped name associated with PDI, from compilation unit | |
2067 | CU. The result will be allocated with malloc. */ | |
2068 | static char * | |
2069 | partial_die_full_name (struct partial_die_info *pdi, | |
2070 | struct dwarf2_cu *cu) | |
2071 | { | |
2072 | char *parent_scope; | |
2073 | ||
2074 | parent_scope = partial_die_parent_scope (pdi, cu); | |
2075 | if (parent_scope == NULL) | |
2076 | return NULL; | |
2077 | else | |
987504bb | 2078 | return typename_concat (NULL, parent_scope, pdi->name, cu); |
c906108c SS |
2079 | } |
2080 | ||
2081 | static void | |
72bf9492 | 2082 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 2083 | { |
e7c27a73 | 2084 | struct objfile *objfile = cu->objfile; |
c906108c | 2085 | CORE_ADDR addr = 0; |
decbce07 | 2086 | char *actual_name = NULL; |
72bf9492 | 2087 | const char *my_prefix; |
5c4e30ca | 2088 | const struct partial_symbol *psym = NULL; |
e142c38c | 2089 | CORE_ADDR baseaddr; |
72bf9492 | 2090 | int built_actual_name = 0; |
e142c38c DJ |
2091 | |
2092 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 2093 | |
72bf9492 | 2094 | if (pdi_needs_namespace (pdi->tag)) |
63d06c5c | 2095 | { |
72bf9492 DJ |
2096 | actual_name = partial_die_full_name (pdi, cu); |
2097 | if (actual_name) | |
2098 | built_actual_name = 1; | |
63d06c5c DC |
2099 | } |
2100 | ||
72bf9492 DJ |
2101 | if (actual_name == NULL) |
2102 | actual_name = pdi->name; | |
2103 | ||
c906108c SS |
2104 | switch (pdi->tag) |
2105 | { | |
2106 | case DW_TAG_subprogram: | |
2cfa0c8d | 2107 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 2108 | { |
2cfa0c8d JB |
2109 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
2110 | of the global scope. But in Ada, we want to be able to access | |
2111 | nested procedures globally. So all Ada subprograms are stored | |
2112 | in the global scope. */ | |
38d518c9 | 2113 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 2114 | mst_text, objfile); */ |
38d518c9 | 2115 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
2116 | VAR_DOMAIN, LOC_BLOCK, |
2117 | &objfile->global_psymbols, | |
2118 | 0, pdi->lowpc + baseaddr, | |
e142c38c | 2119 | cu->language, objfile); |
c906108c SS |
2120 | } |
2121 | else | |
2122 | { | |
38d518c9 | 2123 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 2124 | mst_file_text, objfile); */ |
38d518c9 | 2125 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
2126 | VAR_DOMAIN, LOC_BLOCK, |
2127 | &objfile->static_psymbols, | |
2128 | 0, pdi->lowpc + baseaddr, | |
e142c38c | 2129 | cu->language, objfile); |
c906108c SS |
2130 | } |
2131 | break; | |
2132 | case DW_TAG_variable: | |
2133 | if (pdi->is_external) | |
2134 | { | |
2135 | /* Global Variable. | |
2136 | Don't enter into the minimal symbol tables as there is | |
2137 | a minimal symbol table entry from the ELF symbols already. | |
2138 | Enter into partial symbol table if it has a location | |
2139 | descriptor or a type. | |
2140 | If the location descriptor is missing, new_symbol will create | |
2141 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
2142 | be determined from the minimal symbol table whenever the variable | |
2143 | is referenced. | |
2144 | The address for the partial symbol table entry is not | |
2145 | used by GDB, but it comes in handy for debugging partial symbol | |
2146 | table building. */ | |
2147 | ||
2148 | if (pdi->locdesc) | |
e7c27a73 | 2149 | addr = decode_locdesc (pdi->locdesc, cu); |
c906108c | 2150 | if (pdi->locdesc || pdi->has_type) |
38d518c9 | 2151 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
2152 | VAR_DOMAIN, LOC_STATIC, |
2153 | &objfile->global_psymbols, | |
2154 | 0, addr + baseaddr, | |
e142c38c | 2155 | cu->language, objfile); |
c906108c SS |
2156 | } |
2157 | else | |
2158 | { | |
2159 | /* Static Variable. Skip symbols without location descriptors. */ | |
2160 | if (pdi->locdesc == NULL) | |
decbce07 MS |
2161 | { |
2162 | if (built_actual_name) | |
2163 | xfree (actual_name); | |
2164 | return; | |
2165 | } | |
e7c27a73 | 2166 | addr = decode_locdesc (pdi->locdesc, cu); |
38d518c9 | 2167 | /*prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 2168 | mst_file_data, objfile); */ |
38d518c9 | 2169 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
2170 | VAR_DOMAIN, LOC_STATIC, |
2171 | &objfile->static_psymbols, | |
2172 | 0, addr + baseaddr, | |
e142c38c | 2173 | cu->language, objfile); |
c906108c SS |
2174 | } |
2175 | break; | |
2176 | case DW_TAG_typedef: | |
2177 | case DW_TAG_base_type: | |
a02abb62 | 2178 | case DW_TAG_subrange_type: |
38d518c9 | 2179 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2180 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 2181 | &objfile->static_psymbols, |
e142c38c | 2182 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 2183 | break; |
72bf9492 DJ |
2184 | case DW_TAG_namespace: |
2185 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
2186 | VAR_DOMAIN, LOC_TYPEDEF, | |
2187 | &objfile->global_psymbols, | |
2188 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
2189 | break; | |
c906108c | 2190 | case DW_TAG_class_type: |
680b30c7 | 2191 | case DW_TAG_interface_type: |
c906108c SS |
2192 | case DW_TAG_structure_type: |
2193 | case DW_TAG_union_type: | |
2194 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
2195 | /* Skip external references. The DWARF standard says in the section |
2196 | about "Structure, Union, and Class Type Entries": "An incomplete | |
2197 | structure, union or class type is represented by a structure, | |
2198 | union or class entry that does not have a byte size attribute | |
2199 | and that has a DW_AT_declaration attribute." */ | |
2200 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 MS |
2201 | { |
2202 | if (built_actual_name) | |
2203 | xfree (actual_name); | |
2204 | return; | |
2205 | } | |
fa4028e9 | 2206 | |
63d06c5c DC |
2207 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
2208 | static vs. global. */ | |
38d518c9 | 2209 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2210 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
2211 | (cu->language == language_cplus |
2212 | || cu->language == language_java) | |
63d06c5c DC |
2213 | ? &objfile->global_psymbols |
2214 | : &objfile->static_psymbols, | |
e142c38c | 2215 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 2216 | |
c906108c SS |
2217 | break; |
2218 | case DW_TAG_enumerator: | |
38d518c9 | 2219 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2220 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
2221 | (cu->language == language_cplus |
2222 | || cu->language == language_java) | |
f6fe98ef DJ |
2223 | ? &objfile->global_psymbols |
2224 | : &objfile->static_psymbols, | |
e142c38c | 2225 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
2226 | break; |
2227 | default: | |
2228 | break; | |
2229 | } | |
5c4e30ca DC |
2230 | |
2231 | /* Check to see if we should scan the name for possible namespace | |
2232 | info. Only do this if this is C++, if we don't have namespace | |
2233 | debugging info in the file, if the psym is of an appropriate type | |
2234 | (otherwise we'll have psym == NULL), and if we actually had a | |
2235 | mangled name to begin with. */ | |
2236 | ||
72bf9492 DJ |
2237 | /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the |
2238 | cases which do not set PSYM above? */ | |
2239 | ||
e142c38c | 2240 | if (cu->language == language_cplus |
72bf9492 | 2241 | && cu->has_namespace_info == 0 |
5c4e30ca DC |
2242 | && psym != NULL |
2243 | && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL) | |
2244 | cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym), | |
2245 | objfile); | |
72bf9492 DJ |
2246 | |
2247 | if (built_actual_name) | |
2248 | xfree (actual_name); | |
c906108c SS |
2249 | } |
2250 | ||
72bf9492 DJ |
2251 | /* Determine whether a die of type TAG living in a C++ class or |
2252 | namespace needs to have the name of the scope prepended to the | |
63d06c5c DC |
2253 | name listed in the die. */ |
2254 | ||
2255 | static int | |
72bf9492 | 2256 | pdi_needs_namespace (enum dwarf_tag tag) |
63d06c5c | 2257 | { |
63d06c5c DC |
2258 | switch (tag) |
2259 | { | |
72bf9492 | 2260 | case DW_TAG_namespace: |
63d06c5c DC |
2261 | case DW_TAG_typedef: |
2262 | case DW_TAG_class_type: | |
680b30c7 | 2263 | case DW_TAG_interface_type: |
63d06c5c DC |
2264 | case DW_TAG_structure_type: |
2265 | case DW_TAG_union_type: | |
2266 | case DW_TAG_enumeration_type: | |
2267 | case DW_TAG_enumerator: | |
2268 | return 1; | |
2269 | default: | |
2270 | return 0; | |
2271 | } | |
2272 | } | |
2273 | ||
5c4e30ca DC |
2274 | /* Read a partial die corresponding to a namespace; also, add a symbol |
2275 | corresponding to that namespace to the symbol table. NAMESPACE is | |
2276 | the name of the enclosing namespace. */ | |
91c24f0a | 2277 | |
72bf9492 DJ |
2278 | static void |
2279 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 2280 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 2281 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 2282 | { |
e7c27a73 | 2283 | struct objfile *objfile = cu->objfile; |
5c4e30ca | 2284 | |
72bf9492 | 2285 | /* Add a symbol for the namespace. */ |
e7c27a73 | 2286 | |
72bf9492 | 2287 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
2288 | |
2289 | /* Now scan partial symbols in that namespace. */ | |
2290 | ||
91c24f0a | 2291 | if (pdi->has_children) |
5734ee8b | 2292 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
2293 | } |
2294 | ||
5d7cb8df JK |
2295 | /* Read a partial die corresponding to a Fortran module. */ |
2296 | ||
2297 | static void | |
2298 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
2299 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
2300 | { | |
2301 | /* Now scan partial symbols in that module. | |
2302 | ||
2303 | FIXME: Support the separate Fortran module namespaces. */ | |
2304 | ||
2305 | if (pdi->has_children) | |
2306 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
2307 | } | |
2308 | ||
bc30ff58 JB |
2309 | /* Read a partial die corresponding to a subprogram and create a partial |
2310 | symbol for that subprogram. When the CU language allows it, this | |
2311 | routine also defines a partial symbol for each nested subprogram | |
2312 | that this subprogram contains. | |
2313 | ||
2314 | DIE my also be a lexical block, in which case we simply search | |
2315 | recursively for suprograms defined inside that lexical block. | |
2316 | Again, this is only performed when the CU language allows this | |
2317 | type of definitions. */ | |
2318 | ||
2319 | static void | |
2320 | add_partial_subprogram (struct partial_die_info *pdi, | |
2321 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 2322 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
2323 | { |
2324 | if (pdi->tag == DW_TAG_subprogram) | |
2325 | { | |
2326 | if (pdi->has_pc_info) | |
2327 | { | |
2328 | if (pdi->lowpc < *lowpc) | |
2329 | *lowpc = pdi->lowpc; | |
2330 | if (pdi->highpc > *highpc) | |
2331 | *highpc = pdi->highpc; | |
5734ee8b DJ |
2332 | if (need_pc) |
2333 | { | |
2334 | CORE_ADDR baseaddr; | |
2335 | struct objfile *objfile = cu->objfile; | |
2336 | ||
2337 | baseaddr = ANOFFSET (objfile->section_offsets, | |
2338 | SECT_OFF_TEXT (objfile)); | |
2339 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
2340 | pdi->lowpc, pdi->highpc - 1, | |
2341 | cu->per_cu->psymtab); | |
2342 | } | |
bc30ff58 JB |
2343 | if (!pdi->is_declaration) |
2344 | add_partial_symbol (pdi, cu); | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | if (! pdi->has_children) | |
2349 | return; | |
2350 | ||
2351 | if (cu->language == language_ada) | |
2352 | { | |
2353 | pdi = pdi->die_child; | |
2354 | while (pdi != NULL) | |
2355 | { | |
2356 | fixup_partial_die (pdi, cu); | |
2357 | if (pdi->tag == DW_TAG_subprogram | |
2358 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 2359 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
2360 | pdi = pdi->die_sibling; |
2361 | } | |
2362 | } | |
2363 | } | |
2364 | ||
72bf9492 DJ |
2365 | /* See if we can figure out if the class lives in a namespace. We do |
2366 | this by looking for a member function; its demangled name will | |
2367 | contain namespace info, if there is any. */ | |
63d06c5c | 2368 | |
72bf9492 DJ |
2369 | static void |
2370 | guess_structure_name (struct partial_die_info *struct_pdi, | |
2371 | struct dwarf2_cu *cu) | |
63d06c5c | 2372 | { |
987504bb JJ |
2373 | if ((cu->language == language_cplus |
2374 | || cu->language == language_java) | |
72bf9492 | 2375 | && cu->has_namespace_info == 0 |
63d06c5c DC |
2376 | && struct_pdi->has_children) |
2377 | { | |
63d06c5c DC |
2378 | /* NOTE: carlton/2003-10-07: Getting the info this way changes |
2379 | what template types look like, because the demangler | |
2380 | frequently doesn't give the same name as the debug info. We | |
2381 | could fix this by only using the demangled name to get the | |
134d01f1 | 2382 | prefix (but see comment in read_structure_type). */ |
63d06c5c | 2383 | |
72bf9492 DJ |
2384 | struct partial_die_info *child_pdi = struct_pdi->die_child; |
2385 | struct partial_die_info *real_pdi; | |
5d51ca54 | 2386 | |
72bf9492 DJ |
2387 | /* If this DIE (this DIE's specification, if any) has a parent, then |
2388 | we should not do this. We'll prepend the parent's fully qualified | |
2389 | name when we create the partial symbol. */ | |
5d51ca54 | 2390 | |
72bf9492 | 2391 | real_pdi = struct_pdi; |
72bf9492 | 2392 | while (real_pdi->has_specification) |
10b3939b | 2393 | real_pdi = find_partial_die (real_pdi->spec_offset, cu); |
63d06c5c | 2394 | |
72bf9492 DJ |
2395 | if (real_pdi->die_parent != NULL) |
2396 | return; | |
63d06c5c | 2397 | |
72bf9492 DJ |
2398 | while (child_pdi != NULL) |
2399 | { | |
2400 | if (child_pdi->tag == DW_TAG_subprogram) | |
63d06c5c | 2401 | { |
72bf9492 | 2402 | char *actual_class_name |
31c27f77 JJ |
2403 | = language_class_name_from_physname (cu->language_defn, |
2404 | child_pdi->name); | |
63d06c5c | 2405 | if (actual_class_name != NULL) |
72bf9492 DJ |
2406 | { |
2407 | struct_pdi->name | |
2408 | = obsavestring (actual_class_name, | |
2409 | strlen (actual_class_name), | |
2410 | &cu->comp_unit_obstack); | |
2411 | xfree (actual_class_name); | |
2412 | } | |
63d06c5c DC |
2413 | break; |
2414 | } | |
72bf9492 DJ |
2415 | |
2416 | child_pdi = child_pdi->die_sibling; | |
63d06c5c DC |
2417 | } |
2418 | } | |
63d06c5c DC |
2419 | } |
2420 | ||
91c24f0a DC |
2421 | /* Read a partial die corresponding to an enumeration type. */ |
2422 | ||
72bf9492 DJ |
2423 | static void |
2424 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
2425 | struct dwarf2_cu *cu) | |
91c24f0a | 2426 | { |
e7c27a73 | 2427 | struct objfile *objfile = cu->objfile; |
91c24f0a | 2428 | bfd *abfd = objfile->obfd; |
72bf9492 | 2429 | struct partial_die_info *pdi; |
91c24f0a DC |
2430 | |
2431 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
2432 | add_partial_symbol (enum_pdi, cu); |
2433 | ||
2434 | pdi = enum_pdi->die_child; | |
2435 | while (pdi) | |
91c24f0a | 2436 | { |
72bf9492 | 2437 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 2438 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 2439 | else |
72bf9492 DJ |
2440 | add_partial_symbol (pdi, cu); |
2441 | pdi = pdi->die_sibling; | |
91c24f0a | 2442 | } |
91c24f0a DC |
2443 | } |
2444 | ||
4bb7a0a7 DJ |
2445 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
2446 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
2447 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
2448 | the initial number. */ | |
2449 | ||
2450 | static struct abbrev_info * | |
fe1b8b76 | 2451 | peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 2452 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
2453 | { |
2454 | bfd *abfd = cu->objfile->obfd; | |
2455 | unsigned int abbrev_number; | |
2456 | struct abbrev_info *abbrev; | |
2457 | ||
2458 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
2459 | ||
2460 | if (abbrev_number == 0) | |
2461 | return NULL; | |
2462 | ||
2463 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); | |
2464 | if (!abbrev) | |
2465 | { | |
8a3fe4f8 | 2466 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number, |
4bb7a0a7 DJ |
2467 | bfd_get_filename (abfd)); |
2468 | } | |
2469 | ||
2470 | return abbrev; | |
2471 | } | |
2472 | ||
2473 | /* Scan the debug information for CU starting at INFO_PTR. Returns a | |
2474 | pointer to the end of a series of DIEs, terminated by an empty | |
2475 | DIE. Any children of the skipped DIEs will also be skipped. */ | |
2476 | ||
fe1b8b76 JB |
2477 | static gdb_byte * |
2478 | skip_children (gdb_byte *info_ptr, struct dwarf2_cu *cu) | |
4bb7a0a7 DJ |
2479 | { |
2480 | struct abbrev_info *abbrev; | |
2481 | unsigned int bytes_read; | |
2482 | ||
2483 | while (1) | |
2484 | { | |
2485 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
2486 | if (abbrev == NULL) | |
2487 | return info_ptr + bytes_read; | |
2488 | else | |
2489 | info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu); | |
2490 | } | |
2491 | } | |
2492 | ||
2493 | /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR | |
2494 | should point just after the initial uleb128 of a DIE, and the | |
2495 | abbrev corresponding to that skipped uleb128 should be passed in | |
2496 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
2497 | children. */ | |
2498 | ||
fe1b8b76 JB |
2499 | static gdb_byte * |
2500 | skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev, | |
4bb7a0a7 DJ |
2501 | struct dwarf2_cu *cu) |
2502 | { | |
2503 | unsigned int bytes_read; | |
2504 | struct attribute attr; | |
2505 | bfd *abfd = cu->objfile->obfd; | |
2506 | unsigned int form, i; | |
2507 | ||
2508 | for (i = 0; i < abbrev->num_attrs; i++) | |
2509 | { | |
2510 | /* The only abbrev we care about is DW_AT_sibling. */ | |
2511 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
2512 | { | |
2513 | read_attribute (&attr, &abbrev->attrs[i], | |
2514 | abfd, info_ptr, cu); | |
2515 | if (attr.form == DW_FORM_ref_addr) | |
e2e0b3e5 | 2516 | complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 2517 | else |
dce234bc | 2518 | return dwarf2_per_objfile->info.buffer |
c764a876 | 2519 | + dwarf2_get_ref_die_offset (&attr); |
4bb7a0a7 DJ |
2520 | } |
2521 | ||
2522 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
2523 | form = abbrev->attrs[i].form; | |
2524 | skip_attribute: | |
2525 | switch (form) | |
2526 | { | |
2527 | case DW_FORM_addr: | |
2528 | case DW_FORM_ref_addr: | |
2529 | info_ptr += cu->header.addr_size; | |
2530 | break; | |
2531 | case DW_FORM_data1: | |
2532 | case DW_FORM_ref1: | |
2533 | case DW_FORM_flag: | |
2534 | info_ptr += 1; | |
2535 | break; | |
2536 | case DW_FORM_data2: | |
2537 | case DW_FORM_ref2: | |
2538 | info_ptr += 2; | |
2539 | break; | |
2540 | case DW_FORM_data4: | |
2541 | case DW_FORM_ref4: | |
2542 | info_ptr += 4; | |
2543 | break; | |
2544 | case DW_FORM_data8: | |
2545 | case DW_FORM_ref8: | |
2546 | info_ptr += 8; | |
2547 | break; | |
2548 | case DW_FORM_string: | |
2549 | read_string (abfd, info_ptr, &bytes_read); | |
2550 | info_ptr += bytes_read; | |
2551 | break; | |
2552 | case DW_FORM_strp: | |
2553 | info_ptr += cu->header.offset_size; | |
2554 | break; | |
2555 | case DW_FORM_block: | |
2556 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
2557 | info_ptr += bytes_read; | |
2558 | break; | |
2559 | case DW_FORM_block1: | |
2560 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
2561 | break; | |
2562 | case DW_FORM_block2: | |
2563 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
2564 | break; | |
2565 | case DW_FORM_block4: | |
2566 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
2567 | break; | |
2568 | case DW_FORM_sdata: | |
2569 | case DW_FORM_udata: | |
2570 | case DW_FORM_ref_udata: | |
2571 | info_ptr = skip_leb128 (abfd, info_ptr); | |
2572 | break; | |
2573 | case DW_FORM_indirect: | |
2574 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
2575 | info_ptr += bytes_read; | |
2576 | /* We need to continue parsing from here, so just go back to | |
2577 | the top. */ | |
2578 | goto skip_attribute; | |
2579 | ||
2580 | default: | |
8a3fe4f8 | 2581 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
4bb7a0a7 DJ |
2582 | dwarf_form_name (form), |
2583 | bfd_get_filename (abfd)); | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | if (abbrev->has_children) | |
2588 | return skip_children (info_ptr, cu); | |
2589 | else | |
2590 | return info_ptr; | |
2591 | } | |
2592 | ||
2593 | /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of | |
2594 | the next DIE after ORIG_PDI. */ | |
91c24f0a | 2595 | |
fe1b8b76 JB |
2596 | static gdb_byte * |
2597 | locate_pdi_sibling (struct partial_die_info *orig_pdi, gdb_byte *info_ptr, | |
e7c27a73 | 2598 | bfd *abfd, struct dwarf2_cu *cu) |
91c24f0a DC |
2599 | { |
2600 | /* Do we know the sibling already? */ | |
72bf9492 | 2601 | |
91c24f0a DC |
2602 | if (orig_pdi->sibling) |
2603 | return orig_pdi->sibling; | |
2604 | ||
2605 | /* Are there any children to deal with? */ | |
2606 | ||
2607 | if (!orig_pdi->has_children) | |
2608 | return info_ptr; | |
2609 | ||
4bb7a0a7 | 2610 | /* Skip the children the long way. */ |
91c24f0a | 2611 | |
4bb7a0a7 | 2612 | return skip_children (info_ptr, cu); |
91c24f0a DC |
2613 | } |
2614 | ||
c906108c SS |
2615 | /* Expand this partial symbol table into a full symbol table. */ |
2616 | ||
2617 | static void | |
fba45db2 | 2618 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2619 | { |
2620 | /* FIXME: This is barely more than a stub. */ | |
2621 | if (pst != NULL) | |
2622 | { | |
2623 | if (pst->readin) | |
2624 | { | |
8a3fe4f8 | 2625 | warning (_("bug: psymtab for %s is already read in."), pst->filename); |
c906108c SS |
2626 | } |
2627 | else | |
2628 | { | |
2629 | if (info_verbose) | |
2630 | { | |
a3f17187 | 2631 | printf_filtered (_("Reading in symbols for %s..."), pst->filename); |
c906108c SS |
2632 | gdb_flush (gdb_stdout); |
2633 | } | |
2634 | ||
10b3939b DJ |
2635 | /* Restore our global data. */ |
2636 | dwarf2_per_objfile = objfile_data (pst->objfile, | |
2637 | dwarf2_objfile_data_key); | |
2638 | ||
b2ab525c KB |
2639 | /* If this psymtab is constructed from a debug-only objfile, the |
2640 | has_section_at_zero flag will not necessarily be correct. We | |
2641 | can get the correct value for this flag by looking at the data | |
2642 | associated with the (presumably stripped) associated objfile. */ | |
2643 | if (pst->objfile->separate_debug_objfile_backlink) | |
2644 | { | |
2645 | struct dwarf2_per_objfile *dpo_backlink | |
2646 | = objfile_data (pst->objfile->separate_debug_objfile_backlink, | |
2647 | dwarf2_objfile_data_key); | |
2648 | dwarf2_per_objfile->has_section_at_zero | |
2649 | = dpo_backlink->has_section_at_zero; | |
2650 | } | |
2651 | ||
c906108c SS |
2652 | psymtab_to_symtab_1 (pst); |
2653 | ||
2654 | /* Finish up the debug error message. */ | |
2655 | if (info_verbose) | |
a3f17187 | 2656 | printf_filtered (_("done.\n")); |
c906108c SS |
2657 | } |
2658 | } | |
2659 | } | |
2660 | ||
10b3939b DJ |
2661 | /* Add PER_CU to the queue. */ |
2662 | ||
2663 | static void | |
03dd20cc | 2664 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile) |
10b3939b DJ |
2665 | { |
2666 | struct dwarf2_queue_item *item; | |
2667 | ||
2668 | per_cu->queued = 1; | |
2669 | item = xmalloc (sizeof (*item)); | |
2670 | item->per_cu = per_cu; | |
2671 | item->next = NULL; | |
2672 | ||
2673 | if (dwarf2_queue == NULL) | |
2674 | dwarf2_queue = item; | |
2675 | else | |
2676 | dwarf2_queue_tail->next = item; | |
2677 | ||
2678 | dwarf2_queue_tail = item; | |
03dd20cc DJ |
2679 | |
2680 | /* Either PER_CU is the CU we want to process, or we're following a reference | |
2681 | pointing into PER_CU. Either way, we need its DIEs now. */ | |
2682 | load_full_comp_unit (item->per_cu, objfile); | |
2683 | item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
2684 | dwarf2_per_objfile->read_in_chain = item->per_cu; | |
10b3939b DJ |
2685 | } |
2686 | ||
2687 | /* Process the queue. */ | |
2688 | ||
2689 | static void | |
2690 | process_queue (struct objfile *objfile) | |
2691 | { | |
2692 | struct dwarf2_queue_item *item, *next_item; | |
2693 | ||
03dd20cc DJ |
2694 | /* The queue starts out with one item, but following a DIE reference |
2695 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
2696 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
2697 | { | |
31ffec48 | 2698 | if (item->per_cu->psymtab && !item->per_cu->psymtab->readin) |
10b3939b DJ |
2699 | process_full_comp_unit (item->per_cu); |
2700 | ||
2701 | item->per_cu->queued = 0; | |
2702 | next_item = item->next; | |
2703 | xfree (item); | |
2704 | } | |
2705 | ||
2706 | dwarf2_queue_tail = NULL; | |
2707 | } | |
2708 | ||
2709 | /* Free all allocated queue entries. This function only releases anything if | |
2710 | an error was thrown; if the queue was processed then it would have been | |
2711 | freed as we went along. */ | |
2712 | ||
2713 | static void | |
2714 | dwarf2_release_queue (void *dummy) | |
2715 | { | |
2716 | struct dwarf2_queue_item *item, *last; | |
2717 | ||
2718 | item = dwarf2_queue; | |
2719 | while (item) | |
2720 | { | |
2721 | /* Anything still marked queued is likely to be in an | |
2722 | inconsistent state, so discard it. */ | |
2723 | if (item->per_cu->queued) | |
2724 | { | |
2725 | if (item->per_cu->cu != NULL) | |
2726 | free_one_cached_comp_unit (item->per_cu->cu); | |
2727 | item->per_cu->queued = 0; | |
2728 | } | |
2729 | ||
2730 | last = item; | |
2731 | item = item->next; | |
2732 | xfree (last); | |
2733 | } | |
2734 | ||
2735 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
2736 | } | |
2737 | ||
2738 | /* Read in full symbols for PST, and anything it depends on. */ | |
2739 | ||
c906108c | 2740 | static void |
fba45db2 | 2741 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2742 | { |
10b3939b | 2743 | struct dwarf2_per_cu_data *per_cu; |
c906108c | 2744 | struct cleanup *back_to; |
aaa75496 JB |
2745 | int i; |
2746 | ||
2747 | for (i = 0; i < pst->number_of_dependencies; i++) | |
2748 | if (!pst->dependencies[i]->readin) | |
2749 | { | |
2750 | /* Inform about additional files that need to be read in. */ | |
2751 | if (info_verbose) | |
2752 | { | |
a3f17187 | 2753 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
2754 | fputs_filtered (" ", gdb_stdout); |
2755 | wrap_here (""); | |
2756 | fputs_filtered ("and ", gdb_stdout); | |
2757 | wrap_here (""); | |
2758 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
2759 | wrap_here (""); /* Flush output */ | |
2760 | gdb_flush (gdb_stdout); | |
2761 | } | |
2762 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
2763 | } | |
2764 | ||
10b3939b DJ |
2765 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
2766 | ||
2767 | if (per_cu == NULL) | |
aaa75496 JB |
2768 | { |
2769 | /* It's an include file, no symbols to read for it. | |
2770 | Everything is in the parent symtab. */ | |
2771 | pst->readin = 1; | |
2772 | return; | |
2773 | } | |
c906108c | 2774 | |
10b3939b DJ |
2775 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2776 | ||
03dd20cc | 2777 | queue_comp_unit (per_cu, pst->objfile); |
10b3939b DJ |
2778 | |
2779 | process_queue (pst->objfile); | |
2780 | ||
2781 | /* Age the cache, releasing compilation units that have not | |
2782 | been used recently. */ | |
2783 | age_cached_comp_units (); | |
2784 | ||
2785 | do_cleanups (back_to); | |
2786 | } | |
2787 | ||
2788 | /* Load the DIEs associated with PST and PER_CU into memory. */ | |
2789 | ||
2790 | static struct dwarf2_cu * | |
31ffec48 | 2791 | load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile) |
10b3939b | 2792 | { |
31ffec48 | 2793 | bfd *abfd = objfile->obfd; |
10b3939b | 2794 | struct dwarf2_cu *cu; |
c764a876 | 2795 | unsigned int offset; |
fe1b8b76 | 2796 | gdb_byte *info_ptr; |
10b3939b DJ |
2797 | struct cleanup *back_to, *free_cu_cleanup; |
2798 | struct attribute *attr; | |
2799 | CORE_ADDR baseaddr; | |
6502dd73 | 2800 | |
c906108c | 2801 | /* Set local variables from the partial symbol table info. */ |
10b3939b | 2802 | offset = per_cu->offset; |
6502dd73 | 2803 | |
dce234bc | 2804 | info_ptr = dwarf2_per_objfile->info.buffer + offset; |
63d06c5c | 2805 | |
10b3939b DJ |
2806 | cu = xmalloc (sizeof (struct dwarf2_cu)); |
2807 | memset (cu, 0, sizeof (struct dwarf2_cu)); | |
c906108c | 2808 | |
10b3939b DJ |
2809 | /* If an error occurs while loading, release our storage. */ |
2810 | free_cu_cleanup = make_cleanup (free_one_comp_unit, cu); | |
c906108c | 2811 | |
31ffec48 | 2812 | cu->objfile = objfile; |
e7c27a73 | 2813 | |
c906108c | 2814 | /* read in the comp_unit header */ |
10b3939b | 2815 | info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd); |
c906108c SS |
2816 | |
2817 | /* Read the abbrevs for this compilation unit */ | |
10b3939b DJ |
2818 | dwarf2_read_abbrevs (abfd, cu); |
2819 | back_to = make_cleanup (dwarf2_free_abbrev_table, cu); | |
2820 | ||
2821 | cu->header.offset = offset; | |
c906108c | 2822 | |
10b3939b DJ |
2823 | cu->per_cu = per_cu; |
2824 | per_cu->cu = cu; | |
f792889a | 2825 | cu->type_hash = per_cu->type_hash; |
e142c38c | 2826 | |
10b3939b DJ |
2827 | /* We use this obstack for block values in dwarf_alloc_block. */ |
2828 | obstack_init (&cu->comp_unit_obstack); | |
2829 | ||
2830 | cu->dies = read_comp_unit (info_ptr, abfd, cu); | |
2831 | ||
2832 | /* We try not to read any attributes in this function, because not | |
2833 | all objfiles needed for references have been loaded yet, and symbol | |
2834 | table processing isn't initialized. But we have to set the CU language, | |
2835 | or we won't be able to build types correctly. */ | |
2836 | attr = dwarf2_attr (cu->dies, DW_AT_language, cu); | |
2837 | if (attr) | |
2838 | set_cu_language (DW_UNSND (attr), cu); | |
2839 | else | |
2840 | set_cu_language (language_minimal, cu); | |
2841 | ||
2842 | do_cleanups (back_to); | |
e142c38c | 2843 | |
10b3939b DJ |
2844 | /* We've successfully allocated this compilation unit. Let our caller |
2845 | clean it up when finished with it. */ | |
2846 | discard_cleanups (free_cu_cleanup); | |
c906108c | 2847 | |
10b3939b DJ |
2848 | return cu; |
2849 | } | |
2850 | ||
2851 | /* Generate full symbol information for PST and CU, whose DIEs have | |
2852 | already been loaded into memory. */ | |
2853 | ||
2854 | static void | |
2855 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu) | |
2856 | { | |
2857 | struct partial_symtab *pst = per_cu->psymtab; | |
2858 | struct dwarf2_cu *cu = per_cu->cu; | |
2859 | struct objfile *objfile = pst->objfile; | |
2860 | bfd *abfd = objfile->obfd; | |
2861 | CORE_ADDR lowpc, highpc; | |
2862 | struct symtab *symtab; | |
2863 | struct cleanup *back_to; | |
2864 | struct attribute *attr; | |
2865 | CORE_ADDR baseaddr; | |
2866 | ||
2867 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2868 | ||
10b3939b DJ |
2869 | buildsym_init (); |
2870 | back_to = make_cleanup (really_free_pendings, NULL); | |
2871 | ||
2872 | cu->list_in_scope = &file_symbols; | |
c906108c | 2873 | |
0d53c4c4 DJ |
2874 | /* Find the base address of the compilation unit for range lists and |
2875 | location lists. It will normally be specified by DW_AT_low_pc. | |
2876 | In DWARF-3 draft 4, the base address could be overridden by | |
2877 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
2878 | compilation units with discontinuous ranges. */ | |
2879 | ||
d00adf39 DE |
2880 | cu->base_known = 0; |
2881 | cu->base_address = 0; | |
0d53c4c4 | 2882 | |
10b3939b | 2883 | attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu); |
0d53c4c4 DJ |
2884 | if (attr) |
2885 | { | |
d00adf39 DE |
2886 | cu->base_address = DW_ADDR (attr); |
2887 | cu->base_known = 1; | |
0d53c4c4 DJ |
2888 | } |
2889 | else | |
2890 | { | |
10b3939b | 2891 | attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu); |
0d53c4c4 DJ |
2892 | if (attr) |
2893 | { | |
d00adf39 DE |
2894 | cu->base_address = DW_ADDR (attr); |
2895 | cu->base_known = 1; | |
0d53c4c4 DJ |
2896 | } |
2897 | } | |
2898 | ||
c906108c | 2899 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 2900 | process_die (cu->dies, cu); |
c906108c | 2901 | |
fae299cd DC |
2902 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
2903 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
2904 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 2905 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 2906 | |
613e1657 | 2907 | symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); |
c906108c SS |
2908 | |
2909 | /* Set symtab language to language from DW_AT_language. | |
2910 | If the compilation is from a C file generated by language preprocessors, | |
2911 | do not set the language if it was already deduced by start_subfile. */ | |
2912 | if (symtab != NULL | |
10b3939b | 2913 | && !(cu->language == language_c && symtab->language != language_c)) |
c906108c | 2914 | { |
10b3939b | 2915 | symtab->language = cu->language; |
c906108c SS |
2916 | } |
2917 | pst->symtab = symtab; | |
2918 | pst->readin = 1; | |
c906108c SS |
2919 | |
2920 | do_cleanups (back_to); | |
2921 | } | |
2922 | ||
2923 | /* Process a die and its children. */ | |
2924 | ||
2925 | static void | |
e7c27a73 | 2926 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
2927 | { |
2928 | switch (die->tag) | |
2929 | { | |
2930 | case DW_TAG_padding: | |
2931 | break; | |
2932 | case DW_TAG_compile_unit: | |
e7c27a73 | 2933 | read_file_scope (die, cu); |
c906108c SS |
2934 | break; |
2935 | case DW_TAG_subprogram: | |
c906108c | 2936 | case DW_TAG_inlined_subroutine: |
edb3359d | 2937 | read_func_scope (die, cu); |
c906108c SS |
2938 | break; |
2939 | case DW_TAG_lexical_block: | |
14898363 L |
2940 | case DW_TAG_try_block: |
2941 | case DW_TAG_catch_block: | |
e7c27a73 | 2942 | read_lexical_block_scope (die, cu); |
c906108c SS |
2943 | break; |
2944 | case DW_TAG_class_type: | |
680b30c7 | 2945 | case DW_TAG_interface_type: |
c906108c SS |
2946 | case DW_TAG_structure_type: |
2947 | case DW_TAG_union_type: | |
134d01f1 | 2948 | process_structure_scope (die, cu); |
c906108c SS |
2949 | break; |
2950 | case DW_TAG_enumeration_type: | |
134d01f1 | 2951 | process_enumeration_scope (die, cu); |
c906108c | 2952 | break; |
134d01f1 | 2953 | |
f792889a DJ |
2954 | /* These dies have a type, but processing them does not create |
2955 | a symbol or recurse to process the children. Therefore we can | |
2956 | read them on-demand through read_type_die. */ | |
c906108c | 2957 | case DW_TAG_subroutine_type: |
72019c9c | 2958 | case DW_TAG_set_type: |
c906108c | 2959 | case DW_TAG_array_type: |
c906108c | 2960 | case DW_TAG_pointer_type: |
c906108c | 2961 | case DW_TAG_ptr_to_member_type: |
c906108c | 2962 | case DW_TAG_reference_type: |
c906108c | 2963 | case DW_TAG_string_type: |
c906108c | 2964 | break; |
134d01f1 | 2965 | |
c906108c | 2966 | case DW_TAG_base_type: |
a02abb62 | 2967 | case DW_TAG_subrange_type: |
cb249c71 | 2968 | case DW_TAG_typedef: |
134d01f1 DJ |
2969 | /* Add a typedef symbol for the type definition, if it has a |
2970 | DW_AT_name. */ | |
f792889a | 2971 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 2972 | break; |
c906108c | 2973 | case DW_TAG_common_block: |
e7c27a73 | 2974 | read_common_block (die, cu); |
c906108c SS |
2975 | break; |
2976 | case DW_TAG_common_inclusion: | |
2977 | break; | |
d9fa45fe | 2978 | case DW_TAG_namespace: |
63d06c5c | 2979 | processing_has_namespace_info = 1; |
e7c27a73 | 2980 | read_namespace (die, cu); |
d9fa45fe | 2981 | break; |
5d7cb8df JK |
2982 | case DW_TAG_module: |
2983 | read_module (die, cu); | |
2984 | break; | |
d9fa45fe DC |
2985 | case DW_TAG_imported_declaration: |
2986 | case DW_TAG_imported_module: | |
63d06c5c | 2987 | processing_has_namespace_info = 1; |
27aa8d6a SW |
2988 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
2989 | || cu->language != language_fortran)) | |
2990 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
2991 | dwarf_tag_name (die->tag)); | |
2992 | read_import_statement (die, cu); | |
d9fa45fe | 2993 | break; |
c906108c | 2994 | default: |
e7c27a73 | 2995 | new_symbol (die, NULL, cu); |
c906108c SS |
2996 | break; |
2997 | } | |
2998 | } | |
2999 | ||
0114d602 DJ |
3000 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
3001 | If scope qualifiers are appropriate they will be added. The result | |
3002 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
3003 | not have a name. */ | |
3004 | ||
3005 | static const char * | |
3006 | dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu) | |
3007 | { | |
3008 | struct attribute *attr; | |
3009 | char *prefix, *name; | |
3010 | struct ui_file *buf = NULL; | |
3011 | ||
3012 | name = dwarf2_name (die, cu); | |
3013 | if (!name) | |
3014 | return NULL; | |
3015 | ||
3016 | /* These are the only languages we know how to qualify names in. */ | |
3017 | if (cu->language != language_cplus | |
3018 | && cu->language != language_java) | |
3019 | return name; | |
3020 | ||
3021 | /* If no prefix is necessary for this type of DIE, return the | |
3022 | unqualified name. The other three tags listed could be handled | |
3023 | in pdi_needs_namespace, but that requires broader changes. */ | |
3024 | if (!pdi_needs_namespace (die->tag) | |
3025 | && die->tag != DW_TAG_subprogram | |
3026 | && die->tag != DW_TAG_variable | |
3027 | && die->tag != DW_TAG_member) | |
3028 | return name; | |
3029 | ||
3030 | prefix = determine_prefix (die, cu); | |
3031 | if (*prefix != '\0') | |
3032 | name = typename_concat (&cu->objfile->objfile_obstack, prefix, | |
3033 | name, cu); | |
3034 | ||
3035 | return name; | |
3036 | } | |
3037 | ||
27aa8d6a SW |
3038 | /* Read the import statement specified by the given die and record it. */ |
3039 | ||
3040 | static void | |
3041 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
3042 | { | |
3043 | struct attribute *import_attr; | |
3044 | struct die_info *imported_die; | |
3045 | const char *imported_name; | |
794684b6 SW |
3046 | const char *imported_name_prefix; |
3047 | const char *import_prefix; | |
3048 | char *canonical_name; | |
27aa8d6a SW |
3049 | |
3050 | import_attr = dwarf2_attr (die, DW_AT_import, cu); | |
3051 | if (import_attr == NULL) | |
3052 | { | |
3053 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
3054 | dwarf_tag_name (die->tag)); | |
3055 | return; | |
3056 | } | |
3057 | ||
3058 | imported_die = follow_die_ref (die, import_attr, &cu); | |
3059 | imported_name = dwarf2_name (imported_die, cu); | |
3060 | if (imported_name == NULL) | |
3061 | { | |
3062 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
3063 | ||
3064 | The import in the following code: | |
3065 | namespace A | |
3066 | { | |
3067 | typedef int B; | |
3068 | } | |
3069 | ||
3070 | int main () | |
3071 | { | |
3072 | using A::B; | |
3073 | B b; | |
3074 | return b; | |
3075 | } | |
3076 | ||
3077 | ... | |
3078 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
3079 | <52> DW_AT_decl_file : 1 | |
3080 | <53> DW_AT_decl_line : 6 | |
3081 | <54> DW_AT_import : <0x75> | |
3082 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
3083 | <59> DW_AT_name : B | |
3084 | <5b> DW_AT_decl_file : 1 | |
3085 | <5c> DW_AT_decl_line : 2 | |
3086 | <5d> DW_AT_type : <0x6e> | |
3087 | ... | |
3088 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
3089 | <76> DW_AT_byte_size : 4 | |
3090 | <77> DW_AT_encoding : 5 (signed) | |
3091 | ||
3092 | imports the wrong die ( 0x75 instead of 0x58 ). | |
3093 | This case will be ignored until the gcc bug is fixed. */ | |
3094 | return; | |
3095 | } | |
3096 | ||
3097 | /* FIXME: dwarf2_name (die); for the local name after import. */ | |
3098 | ||
794684b6 SW |
3099 | /* Figure out where the statement is being imported to. */ |
3100 | import_prefix = determine_prefix (die, cu); | |
3101 | ||
3102 | /* Figure out what the scope of the imported die is and prepend it | |
3103 | to the name of the imported die. */ | |
3104 | imported_name_prefix = determine_prefix (imported_die, cu); | |
3105 | ||
3106 | if (strlen (imported_name_prefix) > 0) | |
3107 | { | |
3108 | canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1); | |
3109 | strcpy (canonical_name, imported_name_prefix); | |
3110 | strcat (canonical_name, "::"); | |
3111 | strcat (canonical_name, imported_name); | |
3112 | } | |
3113 | else | |
3114 | { | |
3115 | canonical_name = alloca (strlen (imported_name) + 1); | |
3116 | strcpy (canonical_name, imported_name); | |
3117 | } | |
3118 | ||
3119 | using_directives = cp_add_using (import_prefix,canonical_name, using_directives); | |
27aa8d6a SW |
3120 | } |
3121 | ||
5fb290d7 | 3122 | static void |
e142c38c | 3123 | initialize_cu_func_list (struct dwarf2_cu *cu) |
5fb290d7 | 3124 | { |
e142c38c | 3125 | cu->first_fn = cu->last_fn = cu->cached_fn = NULL; |
5fb290d7 DJ |
3126 | } |
3127 | ||
cb1df416 DJ |
3128 | static void |
3129 | free_cu_line_header (void *arg) | |
3130 | { | |
3131 | struct dwarf2_cu *cu = arg; | |
3132 | ||
3133 | free_line_header (cu->line_header); | |
3134 | cu->line_header = NULL; | |
3135 | } | |
3136 | ||
c906108c | 3137 | static void |
e7c27a73 | 3138 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 3139 | { |
e7c27a73 DJ |
3140 | struct objfile *objfile = cu->objfile; |
3141 | struct comp_unit_head *cu_header = &cu->header; | |
debd256d | 3142 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 3143 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
3144 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
3145 | struct attribute *attr; | |
e1024ff1 | 3146 | char *name = NULL; |
c906108c SS |
3147 | char *comp_dir = NULL; |
3148 | struct die_info *child_die; | |
3149 | bfd *abfd = objfile->obfd; | |
debd256d | 3150 | struct line_header *line_header = 0; |
e142c38c DJ |
3151 | CORE_ADDR baseaddr; |
3152 | ||
3153 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 3154 | |
fae299cd | 3155 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
3156 | |
3157 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
3158 | from finish_block. */ | |
2acceee2 | 3159 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
3160 | lowpc = highpc; |
3161 | lowpc += baseaddr; | |
3162 | highpc += baseaddr; | |
3163 | ||
39cbfefa DJ |
3164 | /* Find the filename. Do not use dwarf2_name here, since the filename |
3165 | is not a source language identifier. */ | |
e142c38c | 3166 | attr = dwarf2_attr (die, DW_AT_name, cu); |
c906108c SS |
3167 | if (attr) |
3168 | { | |
3169 | name = DW_STRING (attr); | |
3170 | } | |
e1024ff1 | 3171 | |
e142c38c | 3172 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); |
c906108c | 3173 | if (attr) |
e1024ff1 DJ |
3174 | comp_dir = DW_STRING (attr); |
3175 | else if (name != NULL && IS_ABSOLUTE_PATH (name)) | |
c906108c | 3176 | { |
e1024ff1 DJ |
3177 | comp_dir = ldirname (name); |
3178 | if (comp_dir != NULL) | |
3179 | make_cleanup (xfree, comp_dir); | |
3180 | } | |
3181 | if (comp_dir != NULL) | |
3182 | { | |
3183 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
3184 | directory, get rid of it. */ | |
3185 | char *cp = strchr (comp_dir, ':'); | |
c906108c | 3186 | |
e1024ff1 DJ |
3187 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') |
3188 | comp_dir = cp + 1; | |
c906108c SS |
3189 | } |
3190 | ||
e1024ff1 DJ |
3191 | if (name == NULL) |
3192 | name = "<unknown>"; | |
3193 | ||
e142c38c | 3194 | attr = dwarf2_attr (die, DW_AT_language, cu); |
c906108c SS |
3195 | if (attr) |
3196 | { | |
e142c38c | 3197 | set_cu_language (DW_UNSND (attr), cu); |
c906108c SS |
3198 | } |
3199 | ||
b0f35d58 DL |
3200 | attr = dwarf2_attr (die, DW_AT_producer, cu); |
3201 | if (attr) | |
3202 | cu->producer = DW_STRING (attr); | |
303b6f5d | 3203 | |
c906108c SS |
3204 | /* We assume that we're processing GCC output. */ |
3205 | processing_gcc_compilation = 2; | |
c906108c | 3206 | |
df8a16a1 DJ |
3207 | processing_has_namespace_info = 0; |
3208 | ||
c906108c SS |
3209 | start_symtab (name, comp_dir, lowpc); |
3210 | record_debugformat ("DWARF 2"); | |
303b6f5d | 3211 | record_producer (cu->producer); |
c906108c | 3212 | |
e142c38c | 3213 | initialize_cu_func_list (cu); |
c906108c | 3214 | |
cb1df416 DJ |
3215 | /* Decode line number information if present. We do this before |
3216 | processing child DIEs, so that the line header table is available | |
3217 | for DW_AT_decl_file. */ | |
e142c38c | 3218 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5fb290d7 DJ |
3219 | if (attr) |
3220 | { | |
debd256d | 3221 | unsigned int line_offset = DW_UNSND (attr); |
e7c27a73 | 3222 | line_header = dwarf_decode_line_header (line_offset, abfd, cu); |
debd256d JB |
3223 | if (line_header) |
3224 | { | |
cb1df416 DJ |
3225 | cu->line_header = line_header; |
3226 | make_cleanup (free_cu_line_header, cu); | |
aaa75496 | 3227 | dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL); |
debd256d | 3228 | } |
5fb290d7 | 3229 | } |
debd256d | 3230 | |
cb1df416 DJ |
3231 | /* Process all dies in compilation unit. */ |
3232 | if (die->child != NULL) | |
3233 | { | |
3234 | child_die = die->child; | |
3235 | while (child_die && child_die->tag) | |
3236 | { | |
3237 | process_die (child_die, cu); | |
3238 | child_die = sibling_die (child_die); | |
3239 | } | |
3240 | } | |
3241 | ||
2e276125 JB |
3242 | /* Decode macro information, if present. Dwarf 2 macro information |
3243 | refers to information in the line number info statement program | |
3244 | header, so we can only read it if we've read the header | |
3245 | successfully. */ | |
e142c38c | 3246 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); |
41ff2da1 | 3247 | if (attr && line_header) |
2e276125 JB |
3248 | { |
3249 | unsigned int macro_offset = DW_UNSND (attr); | |
3250 | dwarf_decode_macros (line_header, macro_offset, | |
e7c27a73 | 3251 | comp_dir, abfd, cu); |
2e276125 | 3252 | } |
debd256d | 3253 | do_cleanups (back_to); |
5fb290d7 DJ |
3254 | } |
3255 | ||
3256 | static void | |
e142c38c DJ |
3257 | add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc, |
3258 | struct dwarf2_cu *cu) | |
5fb290d7 DJ |
3259 | { |
3260 | struct function_range *thisfn; | |
3261 | ||
3262 | thisfn = (struct function_range *) | |
7b5a2f43 | 3263 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range)); |
5fb290d7 DJ |
3264 | thisfn->name = name; |
3265 | thisfn->lowpc = lowpc; | |
3266 | thisfn->highpc = highpc; | |
3267 | thisfn->seen_line = 0; | |
3268 | thisfn->next = NULL; | |
3269 | ||
e142c38c DJ |
3270 | if (cu->last_fn == NULL) |
3271 | cu->first_fn = thisfn; | |
5fb290d7 | 3272 | else |
e142c38c | 3273 | cu->last_fn->next = thisfn; |
5fb290d7 | 3274 | |
e142c38c | 3275 | cu->last_fn = thisfn; |
c906108c SS |
3276 | } |
3277 | ||
d389af10 JK |
3278 | /* qsort helper for inherit_abstract_dies. */ |
3279 | ||
3280 | static int | |
3281 | unsigned_int_compar (const void *ap, const void *bp) | |
3282 | { | |
3283 | unsigned int a = *(unsigned int *) ap; | |
3284 | unsigned int b = *(unsigned int *) bp; | |
3285 | ||
3286 | return (a > b) - (b > a); | |
3287 | } | |
3288 | ||
3289 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3290 | Inherit only the children of the DW_AT_abstract_origin DIE not being already | |
3291 | referenced by DW_AT_abstract_origin from the children of the current DIE. */ | |
3292 | ||
3293 | static void | |
3294 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
3295 | { | |
3296 | struct die_info *child_die; | |
3297 | unsigned die_children_count; | |
3298 | /* CU offsets which were referenced by children of the current DIE. */ | |
3299 | unsigned *offsets; | |
3300 | unsigned *offsets_end, *offsetp; | |
3301 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ | |
3302 | struct die_info *origin_die; | |
3303 | /* Iterator of the ORIGIN_DIE children. */ | |
3304 | struct die_info *origin_child_die; | |
3305 | struct cleanup *cleanups; | |
3306 | struct attribute *attr; | |
3307 | ||
3308 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
3309 | if (!attr) | |
3310 | return; | |
3311 | ||
3312 | origin_die = follow_die_ref (die, attr, &cu); | |
edb3359d DJ |
3313 | if (die->tag != origin_die->tag |
3314 | && !(die->tag == DW_TAG_inlined_subroutine | |
3315 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
3316 | complaint (&symfile_complaints, |
3317 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
3318 | die->offset, origin_die->offset); | |
3319 | ||
3320 | child_die = die->child; | |
3321 | die_children_count = 0; | |
3322 | while (child_die && child_die->tag) | |
3323 | { | |
3324 | child_die = sibling_die (child_die); | |
3325 | die_children_count++; | |
3326 | } | |
3327 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
3328 | cleanups = make_cleanup (xfree, offsets); | |
3329 | ||
3330 | offsets_end = offsets; | |
3331 | child_die = die->child; | |
3332 | while (child_die && child_die->tag) | |
3333 | { | |
3334 | attr = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
3335 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract | |
3336 | counterpart may exist. */ | |
3337 | if (attr) | |
3338 | { | |
3339 | struct die_info *child_origin_die; | |
3340 | ||
3341 | child_origin_die = follow_die_ref (child_die, attr, &cu); | |
edb3359d DJ |
3342 | if (child_die->tag != child_origin_die->tag |
3343 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
3344 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
3345 | complaint (&symfile_complaints, |
3346 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
3347 | "different tags"), child_die->offset, | |
3348 | child_origin_die->offset); | |
3349 | *offsets_end++ = child_origin_die->offset; | |
3350 | } | |
3351 | child_die = sibling_die (child_die); | |
3352 | } | |
3353 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
3354 | unsigned_int_compar); | |
3355 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
3356 | if (offsetp[-1] == *offsetp) | |
3357 | complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer " | |
3358 | "to DIE 0x%x as their abstract origin"), | |
3359 | die->offset, *offsetp); | |
3360 | ||
3361 | offsetp = offsets; | |
3362 | origin_child_die = origin_die->child; | |
3363 | while (origin_child_die && origin_child_die->tag) | |
3364 | { | |
3365 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
3366 | while (offsetp < offsets_end && *offsetp < origin_child_die->offset) | |
3367 | offsetp++; | |
3368 | if (offsetp >= offsets_end || *offsetp > origin_child_die->offset) | |
3369 | { | |
3370 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
3371 | process_die (origin_child_die, cu); | |
3372 | } | |
3373 | origin_child_die = sibling_die (origin_child_die); | |
3374 | } | |
3375 | ||
3376 | do_cleanups (cleanups); | |
3377 | } | |
3378 | ||
c906108c | 3379 | static void |
e7c27a73 | 3380 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 3381 | { |
e7c27a73 | 3382 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 3383 | struct context_stack *new; |
c906108c SS |
3384 | CORE_ADDR lowpc; |
3385 | CORE_ADDR highpc; | |
3386 | struct die_info *child_die; | |
edb3359d | 3387 | struct attribute *attr, *call_line, *call_file; |
c906108c | 3388 | char *name; |
e142c38c | 3389 | CORE_ADDR baseaddr; |
801e3a5b | 3390 | struct block *block; |
edb3359d DJ |
3391 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
3392 | ||
3393 | if (inlined_func) | |
3394 | { | |
3395 | /* If we do not have call site information, we can't show the | |
3396 | caller of this inlined function. That's too confusing, so | |
3397 | only use the scope for local variables. */ | |
3398 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
3399 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
3400 | if (call_line == NULL || call_file == NULL) | |
3401 | { | |
3402 | read_lexical_block_scope (die, cu); | |
3403 | return; | |
3404 | } | |
3405 | } | |
c906108c | 3406 | |
e142c38c DJ |
3407 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
3408 | ||
3409 | name = dwarf2_linkage_name (die, cu); | |
c906108c SS |
3410 | |
3411 | /* Ignore functions with missing or empty names and functions with | |
3412 | missing or invalid low and high pc attributes. */ | |
e7c27a73 | 3413 | if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
c906108c SS |
3414 | return; |
3415 | ||
3416 | lowpc += baseaddr; | |
3417 | highpc += baseaddr; | |
3418 | ||
5fb290d7 | 3419 | /* Record the function range for dwarf_decode_lines. */ |
e142c38c | 3420 | add_to_cu_func_list (name, lowpc, highpc, cu); |
5fb290d7 | 3421 | |
c906108c | 3422 | new = push_context (0, lowpc); |
f792889a | 3423 | new->name = new_symbol (die, read_type_die (die, cu), cu); |
4c2df51b | 3424 | |
4cecd739 DJ |
3425 | /* If there is a location expression for DW_AT_frame_base, record |
3426 | it. */ | |
e142c38c | 3427 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 3428 | if (attr) |
c034e007 AC |
3429 | /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location |
3430 | expression is being recorded directly in the function's symbol | |
3431 | and not in a separate frame-base object. I guess this hack is | |
3432 | to avoid adding some sort of frame-base adjunct/annex to the | |
3433 | function's symbol :-(. The problem with doing this is that it | |
3434 | results in a function symbol with a location expression that | |
3435 | has nothing to do with the location of the function, ouch! The | |
3436 | relationship should be: a function's symbol has-a frame base; a | |
3437 | frame-base has-a location expression. */ | |
e7c27a73 | 3438 | dwarf2_symbol_mark_computed (attr, new->name, cu); |
4c2df51b | 3439 | |
e142c38c | 3440 | cu->list_in_scope = &local_symbols; |
c906108c | 3441 | |
639d11d3 | 3442 | if (die->child != NULL) |
c906108c | 3443 | { |
639d11d3 | 3444 | child_die = die->child; |
c906108c SS |
3445 | while (child_die && child_die->tag) |
3446 | { | |
e7c27a73 | 3447 | process_die (child_die, cu); |
c906108c SS |
3448 | child_die = sibling_die (child_die); |
3449 | } | |
3450 | } | |
3451 | ||
d389af10 JK |
3452 | inherit_abstract_dies (die, cu); |
3453 | ||
c906108c SS |
3454 | new = pop_context (); |
3455 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
3456 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
3457 | lowpc, highpc, objfile); | |
3458 | ||
df8a16a1 DJ |
3459 | /* For C++, set the block's scope. */ |
3460 | if (cu->language == language_cplus) | |
3461 | cp_set_block_scope (new->name, block, &objfile->objfile_obstack, | |
0114d602 | 3462 | determine_prefix (die, cu), |
df8a16a1 DJ |
3463 | processing_has_namespace_info); |
3464 | ||
801e3a5b JB |
3465 | /* If we have address ranges, record them. */ |
3466 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
208d8187 JB |
3467 | |
3468 | /* In C++, we can have functions nested inside functions (e.g., when | |
3469 | a function declares a class that has methods). This means that | |
3470 | when we finish processing a function scope, we may need to go | |
3471 | back to building a containing block's symbol lists. */ | |
3472 | local_symbols = new->locals; | |
3473 | param_symbols = new->params; | |
27aa8d6a | 3474 | using_directives = new->using_directives; |
208d8187 | 3475 | |
921e78cf JB |
3476 | /* If we've finished processing a top-level function, subsequent |
3477 | symbols go in the file symbol list. */ | |
3478 | if (outermost_context_p ()) | |
e142c38c | 3479 | cu->list_in_scope = &file_symbols; |
c906108c SS |
3480 | } |
3481 | ||
3482 | /* Process all the DIES contained within a lexical block scope. Start | |
3483 | a new scope, process the dies, and then close the scope. */ | |
3484 | ||
3485 | static void | |
e7c27a73 | 3486 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 3487 | { |
e7c27a73 | 3488 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 3489 | struct context_stack *new; |
c906108c SS |
3490 | CORE_ADDR lowpc, highpc; |
3491 | struct die_info *child_die; | |
e142c38c DJ |
3492 | CORE_ADDR baseaddr; |
3493 | ||
3494 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
3495 | |
3496 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
3497 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
3498 | as multiple lexical blocks? Handling children in a sane way would | |
3499 | be nasty. Might be easier to properly extend generic blocks to | |
3500 | describe ranges. */ | |
e7c27a73 | 3501 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
c906108c SS |
3502 | return; |
3503 | lowpc += baseaddr; | |
3504 | highpc += baseaddr; | |
3505 | ||
3506 | push_context (0, lowpc); | |
639d11d3 | 3507 | if (die->child != NULL) |
c906108c | 3508 | { |
639d11d3 | 3509 | child_die = die->child; |
c906108c SS |
3510 | while (child_die && child_die->tag) |
3511 | { | |
e7c27a73 | 3512 | process_die (child_die, cu); |
c906108c SS |
3513 | child_die = sibling_die (child_die); |
3514 | } | |
3515 | } | |
3516 | new = pop_context (); | |
3517 | ||
3518 | if (local_symbols != NULL) | |
3519 | { | |
801e3a5b JB |
3520 | struct block *block |
3521 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
3522 | highpc, objfile); | |
3523 | ||
3524 | /* Note that recording ranges after traversing children, as we | |
3525 | do here, means that recording a parent's ranges entails | |
3526 | walking across all its children's ranges as they appear in | |
3527 | the address map, which is quadratic behavior. | |
3528 | ||
3529 | It would be nicer to record the parent's ranges before | |
3530 | traversing its children, simply overriding whatever you find | |
3531 | there. But since we don't even decide whether to create a | |
3532 | block until after we've traversed its children, that's hard | |
3533 | to do. */ | |
3534 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
3535 | } |
3536 | local_symbols = new->locals; | |
27aa8d6a | 3537 | using_directives = new->using_directives; |
c906108c SS |
3538 | } |
3539 | ||
43039443 | 3540 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
3541 | Return 1 if the attributes are present and valid, otherwise, return 0. |
3542 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
3543 | |
3544 | static int | |
3545 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
3546 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
3547 | struct partial_symtab *ranges_pst) | |
43039443 JK |
3548 | { |
3549 | struct objfile *objfile = cu->objfile; | |
3550 | struct comp_unit_head *cu_header = &cu->header; | |
3551 | bfd *obfd = objfile->obfd; | |
3552 | unsigned int addr_size = cu_header->addr_size; | |
3553 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
3554 | /* Base address selection entry. */ | |
3555 | CORE_ADDR base; | |
3556 | int found_base; | |
3557 | unsigned int dummy; | |
3558 | gdb_byte *buffer; | |
3559 | CORE_ADDR marker; | |
3560 | int low_set; | |
3561 | CORE_ADDR low = 0; | |
3562 | CORE_ADDR high = 0; | |
ff013f42 | 3563 | CORE_ADDR baseaddr; |
43039443 | 3564 | |
d00adf39 DE |
3565 | found_base = cu->base_known; |
3566 | base = cu->base_address; | |
43039443 | 3567 | |
dce234bc | 3568 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
3569 | { |
3570 | complaint (&symfile_complaints, | |
3571 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
3572 | offset); | |
3573 | return 0; | |
3574 | } | |
dce234bc | 3575 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
3576 | |
3577 | /* Read in the largest possible address. */ | |
3578 | marker = read_address (obfd, buffer, cu, &dummy); | |
3579 | if ((marker & mask) == mask) | |
3580 | { | |
3581 | /* If we found the largest possible address, then | |
3582 | read the base address. */ | |
3583 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
3584 | buffer += 2 * addr_size; | |
3585 | offset += 2 * addr_size; | |
3586 | found_base = 1; | |
3587 | } | |
3588 | ||
3589 | low_set = 0; | |
3590 | ||
e7030f15 | 3591 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 3592 | |
43039443 JK |
3593 | while (1) |
3594 | { | |
3595 | CORE_ADDR range_beginning, range_end; | |
3596 | ||
3597 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
3598 | buffer += addr_size; | |
3599 | range_end = read_address (obfd, buffer, cu, &dummy); | |
3600 | buffer += addr_size; | |
3601 | offset += 2 * addr_size; | |
3602 | ||
3603 | /* An end of list marker is a pair of zero addresses. */ | |
3604 | if (range_beginning == 0 && range_end == 0) | |
3605 | /* Found the end of list entry. */ | |
3606 | break; | |
3607 | ||
3608 | /* Each base address selection entry is a pair of 2 values. | |
3609 | The first is the largest possible address, the second is | |
3610 | the base address. Check for a base address here. */ | |
3611 | if ((range_beginning & mask) == mask) | |
3612 | { | |
3613 | /* If we found the largest possible address, then | |
3614 | read the base address. */ | |
3615 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
3616 | found_base = 1; | |
3617 | continue; | |
3618 | } | |
3619 | ||
3620 | if (!found_base) | |
3621 | { | |
3622 | /* We have no valid base address for the ranges | |
3623 | data. */ | |
3624 | complaint (&symfile_complaints, | |
3625 | _("Invalid .debug_ranges data (no base address)")); | |
3626 | return 0; | |
3627 | } | |
3628 | ||
3629 | range_beginning += base; | |
3630 | range_end += base; | |
3631 | ||
ff013f42 JK |
3632 | if (ranges_pst != NULL && range_beginning < range_end) |
3633 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3634 | range_beginning + baseaddr, range_end - 1 + baseaddr, | |
3635 | ranges_pst); | |
3636 | ||
43039443 JK |
3637 | /* FIXME: This is recording everything as a low-high |
3638 | segment of consecutive addresses. We should have a | |
3639 | data structure for discontiguous block ranges | |
3640 | instead. */ | |
3641 | if (! low_set) | |
3642 | { | |
3643 | low = range_beginning; | |
3644 | high = range_end; | |
3645 | low_set = 1; | |
3646 | } | |
3647 | else | |
3648 | { | |
3649 | if (range_beginning < low) | |
3650 | low = range_beginning; | |
3651 | if (range_end > high) | |
3652 | high = range_end; | |
3653 | } | |
3654 | } | |
3655 | ||
3656 | if (! low_set) | |
3657 | /* If the first entry is an end-of-list marker, the range | |
3658 | describes an empty scope, i.e. no instructions. */ | |
3659 | return 0; | |
3660 | ||
3661 | if (low_return) | |
3662 | *low_return = low; | |
3663 | if (high_return) | |
3664 | *high_return = high; | |
3665 | return 1; | |
3666 | } | |
3667 | ||
af34e669 DJ |
3668 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
3669 | are present and valid, otherwise, return 0. Return -1 if the range is | |
3670 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
c906108c | 3671 | static int |
af34e669 | 3672 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
e7c27a73 | 3673 | CORE_ADDR *highpc, struct dwarf2_cu *cu) |
c906108c SS |
3674 | { |
3675 | struct attribute *attr; | |
af34e669 DJ |
3676 | CORE_ADDR low = 0; |
3677 | CORE_ADDR high = 0; | |
3678 | int ret = 0; | |
c906108c | 3679 | |
e142c38c | 3680 | attr = dwarf2_attr (die, DW_AT_high_pc, cu); |
c906108c | 3681 | if (attr) |
af34e669 DJ |
3682 | { |
3683 | high = DW_ADDR (attr); | |
e142c38c | 3684 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 DJ |
3685 | if (attr) |
3686 | low = DW_ADDR (attr); | |
3687 | else | |
3688 | /* Found high w/o low attribute. */ | |
3689 | return 0; | |
3690 | ||
3691 | /* Found consecutive range of addresses. */ | |
3692 | ret = 1; | |
3693 | } | |
c906108c | 3694 | else |
af34e669 | 3695 | { |
e142c38c | 3696 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
3697 | if (attr != NULL) |
3698 | { | |
af34e669 | 3699 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 3700 | .debug_ranges section. */ |
ff013f42 | 3701 | if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, NULL)) |
af34e669 | 3702 | return 0; |
43039443 | 3703 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
3704 | ret = -1; |
3705 | } | |
3706 | } | |
c906108c SS |
3707 | |
3708 | if (high < low) | |
3709 | return 0; | |
3710 | ||
3711 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
3712 | eliminate duplicate copies of functions and vtables and such. | |
3713 | The linker will arbitrarily choose one and discard the others. | |
3714 | The AT_*_pc values for such functions refer to local labels in | |
3715 | these sections. If the section from that file was discarded, the | |
3716 | labels are not in the output, so the relocs get a value of 0. | |
3717 | If this is a discarded function, mark the pc bounds as invalid, | |
3718 | so that GDB will ignore it. */ | |
72dca2f5 | 3719 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
3720 | return 0; |
3721 | ||
3722 | *lowpc = low; | |
3723 | *highpc = high; | |
af34e669 | 3724 | return ret; |
c906108c SS |
3725 | } |
3726 | ||
b084d499 JB |
3727 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
3728 | its low and high PC addresses. Do nothing if these addresses could not | |
3729 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
3730 | and HIGHPC to the high address if greater than HIGHPC. */ | |
3731 | ||
3732 | static void | |
3733 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
3734 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
3735 | struct dwarf2_cu *cu) | |
3736 | { | |
3737 | CORE_ADDR low, high; | |
3738 | struct die_info *child = die->child; | |
3739 | ||
3740 | if (dwarf2_get_pc_bounds (die, &low, &high, cu)) | |
3741 | { | |
3742 | *lowpc = min (*lowpc, low); | |
3743 | *highpc = max (*highpc, high); | |
3744 | } | |
3745 | ||
3746 | /* If the language does not allow nested subprograms (either inside | |
3747 | subprograms or lexical blocks), we're done. */ | |
3748 | if (cu->language != language_ada) | |
3749 | return; | |
3750 | ||
3751 | /* Check all the children of the given DIE. If it contains nested | |
3752 | subprograms, then check their pc bounds. Likewise, we need to | |
3753 | check lexical blocks as well, as they may also contain subprogram | |
3754 | definitions. */ | |
3755 | while (child && child->tag) | |
3756 | { | |
3757 | if (child->tag == DW_TAG_subprogram | |
3758 | || child->tag == DW_TAG_lexical_block) | |
3759 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
3760 | child = sibling_die (child); | |
3761 | } | |
3762 | } | |
3763 | ||
fae299cd DC |
3764 | /* Get the low and high pc's represented by the scope DIE, and store |
3765 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
3766 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
3767 | ||
3768 | static void | |
3769 | get_scope_pc_bounds (struct die_info *die, | |
3770 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
3771 | struct dwarf2_cu *cu) | |
3772 | { | |
3773 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
3774 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
3775 | CORE_ADDR current_low, current_high; | |
3776 | ||
3777 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu)) | |
3778 | { | |
3779 | best_low = current_low; | |
3780 | best_high = current_high; | |
3781 | } | |
3782 | else | |
3783 | { | |
3784 | struct die_info *child = die->child; | |
3785 | ||
3786 | while (child && child->tag) | |
3787 | { | |
3788 | switch (child->tag) { | |
3789 | case DW_TAG_subprogram: | |
b084d499 | 3790 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
3791 | break; |
3792 | case DW_TAG_namespace: | |
3793 | /* FIXME: carlton/2004-01-16: Should we do this for | |
3794 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
3795 | that current GCC's always emit the DIEs corresponding | |
3796 | to definitions of methods of classes as children of a | |
3797 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
3798 | the DIEs giving the declarations, which could be | |
3799 | anywhere). But I don't see any reason why the | |
3800 | standards says that they have to be there. */ | |
3801 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
3802 | ||
3803 | if (current_low != ((CORE_ADDR) -1)) | |
3804 | { | |
3805 | best_low = min (best_low, current_low); | |
3806 | best_high = max (best_high, current_high); | |
3807 | } | |
3808 | break; | |
3809 | default: | |
3810 | /* Ignore. */ | |
3811 | break; | |
3812 | } | |
3813 | ||
3814 | child = sibling_die (child); | |
3815 | } | |
3816 | } | |
3817 | ||
3818 | *lowpc = best_low; | |
3819 | *highpc = best_high; | |
3820 | } | |
3821 | ||
801e3a5b JB |
3822 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
3823 | in DIE. */ | |
3824 | static void | |
3825 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
3826 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
3827 | { | |
3828 | struct attribute *attr; | |
3829 | ||
3830 | attr = dwarf2_attr (die, DW_AT_high_pc, cu); | |
3831 | if (attr) | |
3832 | { | |
3833 | CORE_ADDR high = DW_ADDR (attr); | |
3834 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3835 | if (attr) | |
3836 | { | |
3837 | CORE_ADDR low = DW_ADDR (attr); | |
3838 | record_block_range (block, baseaddr + low, baseaddr + high - 1); | |
3839 | } | |
3840 | } | |
3841 | ||
3842 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
3843 | if (attr) | |
3844 | { | |
3845 | bfd *obfd = cu->objfile->obfd; | |
3846 | ||
3847 | /* The value of the DW_AT_ranges attribute is the offset of the | |
3848 | address range list in the .debug_ranges section. */ | |
3849 | unsigned long offset = DW_UNSND (attr); | |
dce234bc | 3850 | gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
3851 | |
3852 | /* For some target architectures, but not others, the | |
3853 | read_address function sign-extends the addresses it returns. | |
3854 | To recognize base address selection entries, we need a | |
3855 | mask. */ | |
3856 | unsigned int addr_size = cu->header.addr_size; | |
3857 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
3858 | ||
3859 | /* The base address, to which the next pair is relative. Note | |
3860 | that this 'base' is a DWARF concept: most entries in a range | |
3861 | list are relative, to reduce the number of relocs against the | |
3862 | debugging information. This is separate from this function's | |
3863 | 'baseaddr' argument, which GDB uses to relocate debugging | |
3864 | information from a shared library based on the address at | |
3865 | which the library was loaded. */ | |
d00adf39 DE |
3866 | CORE_ADDR base = cu->base_address; |
3867 | int base_known = cu->base_known; | |
801e3a5b | 3868 | |
dce234bc | 3869 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
3870 | { |
3871 | complaint (&symfile_complaints, | |
3872 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
3873 | offset); | |
3874 | return; | |
3875 | } | |
3876 | ||
3877 | for (;;) | |
3878 | { | |
3879 | unsigned int bytes_read; | |
3880 | CORE_ADDR start, end; | |
3881 | ||
3882 | start = read_address (obfd, buffer, cu, &bytes_read); | |
3883 | buffer += bytes_read; | |
3884 | end = read_address (obfd, buffer, cu, &bytes_read); | |
3885 | buffer += bytes_read; | |
3886 | ||
3887 | /* Did we find the end of the range list? */ | |
3888 | if (start == 0 && end == 0) | |
3889 | break; | |
3890 | ||
3891 | /* Did we find a base address selection entry? */ | |
3892 | else if ((start & base_select_mask) == base_select_mask) | |
3893 | { | |
3894 | base = end; | |
3895 | base_known = 1; | |
3896 | } | |
3897 | ||
3898 | /* We found an ordinary address range. */ | |
3899 | else | |
3900 | { | |
3901 | if (!base_known) | |
3902 | { | |
3903 | complaint (&symfile_complaints, | |
3904 | _("Invalid .debug_ranges data (no base address)")); | |
3905 | return; | |
3906 | } | |
3907 | ||
3908 | record_block_range (block, | |
3909 | baseaddr + base + start, | |
3910 | baseaddr + base + end - 1); | |
3911 | } | |
3912 | } | |
3913 | } | |
3914 | } | |
3915 | ||
c906108c SS |
3916 | /* Add an aggregate field to the field list. */ |
3917 | ||
3918 | static void | |
107d2387 | 3919 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 DJ |
3920 | struct dwarf2_cu *cu) |
3921 | { | |
3922 | struct objfile *objfile = cu->objfile; | |
5e2b427d | 3923 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
3924 | struct nextfield *new_field; |
3925 | struct attribute *attr; | |
3926 | struct field *fp; | |
3927 | char *fieldname = ""; | |
3928 | ||
3929 | /* Allocate a new field list entry and link it in. */ | |
3930 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 3931 | make_cleanup (xfree, new_field); |
c906108c SS |
3932 | memset (new_field, 0, sizeof (struct nextfield)); |
3933 | new_field->next = fip->fields; | |
3934 | fip->fields = new_field; | |
3935 | fip->nfields++; | |
3936 | ||
3937 | /* Handle accessibility and virtuality of field. | |
3938 | The default accessibility for members is public, the default | |
3939 | accessibility for inheritance is private. */ | |
3940 | if (die->tag != DW_TAG_inheritance) | |
3941 | new_field->accessibility = DW_ACCESS_public; | |
3942 | else | |
3943 | new_field->accessibility = DW_ACCESS_private; | |
3944 | new_field->virtuality = DW_VIRTUALITY_none; | |
3945 | ||
e142c38c | 3946 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
3947 | if (attr) |
3948 | new_field->accessibility = DW_UNSND (attr); | |
3949 | if (new_field->accessibility != DW_ACCESS_public) | |
3950 | fip->non_public_fields = 1; | |
e142c38c | 3951 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
3952 | if (attr) |
3953 | new_field->virtuality = DW_UNSND (attr); | |
3954 | ||
3955 | fp = &new_field->field; | |
a9a9bd0f | 3956 | |
e142c38c | 3957 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 3958 | { |
a9a9bd0f DC |
3959 | /* Data member other than a C++ static data member. */ |
3960 | ||
c906108c | 3961 | /* Get type of field. */ |
e7c27a73 | 3962 | fp->type = die_type (die, cu); |
c906108c | 3963 | |
d6a843b5 | 3964 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 3965 | |
c906108c | 3966 | /* Get bit size of field (zero if none). */ |
e142c38c | 3967 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
3968 | if (attr) |
3969 | { | |
3970 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
3971 | } | |
3972 | else | |
3973 | { | |
3974 | FIELD_BITSIZE (*fp) = 0; | |
3975 | } | |
3976 | ||
3977 | /* Get bit offset of field. */ | |
e142c38c | 3978 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
c906108c SS |
3979 | if (attr) |
3980 | { | |
c6a0999f JB |
3981 | int byte_offset; |
3982 | ||
3690dd37 JB |
3983 | if (attr_form_is_section_offset (attr)) |
3984 | { | |
3985 | dwarf2_complex_location_expr_complaint (); | |
c6a0999f | 3986 | byte_offset = 0; |
3690dd37 JB |
3987 | } |
3988 | else if (attr_form_is_constant (attr)) | |
c6a0999f | 3989 | byte_offset = dwarf2_get_attr_constant_value (attr, 0); |
3690dd37 | 3990 | else |
c6a0999f JB |
3991 | byte_offset = decode_locdesc (DW_BLOCK (attr), cu); |
3992 | ||
d6a843b5 | 3993 | SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte); |
c906108c | 3994 | } |
e142c38c | 3995 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
3996 | if (attr) |
3997 | { | |
5e2b427d | 3998 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
3999 | { |
4000 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
4001 | additional bit offset from the MSB of the containing |
4002 | anonymous object to the MSB of the field. We don't | |
4003 | have to do anything special since we don't need to | |
4004 | know the size of the anonymous object. */ | |
c906108c SS |
4005 | FIELD_BITPOS (*fp) += DW_UNSND (attr); |
4006 | } | |
4007 | else | |
4008 | { | |
4009 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
4010 | MSB of the anonymous object, subtract off the number of |
4011 | bits from the MSB of the field to the MSB of the | |
4012 | object, and then subtract off the number of bits of | |
4013 | the field itself. The result is the bit offset of | |
4014 | the LSB of the field. */ | |
c906108c SS |
4015 | int anonymous_size; |
4016 | int bit_offset = DW_UNSND (attr); | |
4017 | ||
e142c38c | 4018 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4019 | if (attr) |
4020 | { | |
4021 | /* The size of the anonymous object containing | |
4022 | the bit field is explicit, so use the | |
4023 | indicated size (in bytes). */ | |
4024 | anonymous_size = DW_UNSND (attr); | |
4025 | } | |
4026 | else | |
4027 | { | |
4028 | /* The size of the anonymous object containing | |
4029 | the bit field must be inferred from the type | |
4030 | attribute of the data member containing the | |
4031 | bit field. */ | |
4032 | anonymous_size = TYPE_LENGTH (fp->type); | |
4033 | } | |
4034 | FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte | |
4035 | - bit_offset - FIELD_BITSIZE (*fp); | |
4036 | } | |
4037 | } | |
4038 | ||
4039 | /* Get name of field. */ | |
39cbfefa DJ |
4040 | fieldname = dwarf2_name (die, cu); |
4041 | if (fieldname == NULL) | |
4042 | fieldname = ""; | |
d8151005 DJ |
4043 | |
4044 | /* The name is already allocated along with this objfile, so we don't | |
4045 | need to duplicate it for the type. */ | |
4046 | fp->name = fieldname; | |
c906108c SS |
4047 | |
4048 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 4049 | pointer or virtual base class pointer) to private. */ |
e142c38c | 4050 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c SS |
4051 | { |
4052 | new_field->accessibility = DW_ACCESS_private; | |
4053 | fip->non_public_fields = 1; | |
4054 | } | |
4055 | } | |
a9a9bd0f | 4056 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 4057 | { |
a9a9bd0f DC |
4058 | /* C++ static member. */ |
4059 | ||
4060 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
4061 | is a declaration, but all versions of G++ as of this writing | |
4062 | (so through at least 3.2.1) incorrectly generate | |
4063 | DW_TAG_variable tags. */ | |
4064 | ||
c906108c | 4065 | char *physname; |
c906108c | 4066 | |
a9a9bd0f | 4067 | /* Get name of field. */ |
39cbfefa DJ |
4068 | fieldname = dwarf2_name (die, cu); |
4069 | if (fieldname == NULL) | |
c906108c SS |
4070 | return; |
4071 | ||
2df3850c | 4072 | /* Get physical name. */ |
e142c38c | 4073 | physname = dwarf2_linkage_name (die, cu); |
c906108c | 4074 | |
d8151005 DJ |
4075 | /* The name is already allocated along with this objfile, so we don't |
4076 | need to duplicate it for the type. */ | |
4077 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 4078 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 4079 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
4080 | } |
4081 | else if (die->tag == DW_TAG_inheritance) | |
4082 | { | |
4083 | /* C++ base class field. */ | |
e142c38c | 4084 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
c906108c | 4085 | if (attr) |
d6a843b5 JK |
4086 | SET_FIELD_BITPOS (*fp, decode_locdesc (DW_BLOCK (attr), cu) |
4087 | * bits_per_byte); | |
c906108c | 4088 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 4089 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
4090 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
4091 | fip->nbaseclasses++; | |
4092 | } | |
4093 | } | |
4094 | ||
4095 | /* Create the vector of fields, and attach it to the type. */ | |
4096 | ||
4097 | static void | |
fba45db2 | 4098 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 4099 | struct dwarf2_cu *cu) |
c906108c SS |
4100 | { |
4101 | int nfields = fip->nfields; | |
4102 | ||
4103 | /* Record the field count, allocate space for the array of fields, | |
4104 | and create blank accessibility bitfields if necessary. */ | |
4105 | TYPE_NFIELDS (type) = nfields; | |
4106 | TYPE_FIELDS (type) = (struct field *) | |
4107 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
4108 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
4109 | ||
4110 | if (fip->non_public_fields) | |
4111 | { | |
4112 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
4113 | ||
4114 | TYPE_FIELD_PRIVATE_BITS (type) = | |
4115 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
4116 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
4117 | ||
4118 | TYPE_FIELD_PROTECTED_BITS (type) = | |
4119 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
4120 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
4121 | ||
4122 | TYPE_FIELD_IGNORE_BITS (type) = | |
4123 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
4124 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
4125 | } | |
4126 | ||
4127 | /* If the type has baseclasses, allocate and clear a bit vector for | |
4128 | TYPE_FIELD_VIRTUAL_BITS. */ | |
4129 | if (fip->nbaseclasses) | |
4130 | { | |
4131 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 4132 | unsigned char *pointer; |
c906108c SS |
4133 | |
4134 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
4135 | pointer = TYPE_ALLOC (type, num_bytes); |
4136 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
4137 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
4138 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
4139 | } | |
4140 | ||
4141 | /* Copy the saved-up fields into the field vector. Start from the head | |
4142 | of the list, adding to the tail of the field array, so that they end | |
4143 | up in the same order in the array in which they were added to the list. */ | |
4144 | while (nfields-- > 0) | |
4145 | { | |
4146 | TYPE_FIELD (type, nfields) = fip->fields->field; | |
4147 | switch (fip->fields->accessibility) | |
4148 | { | |
c5aa993b JM |
4149 | case DW_ACCESS_private: |
4150 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
4151 | break; | |
c906108c | 4152 | |
c5aa993b JM |
4153 | case DW_ACCESS_protected: |
4154 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
4155 | break; | |
c906108c | 4156 | |
c5aa993b JM |
4157 | case DW_ACCESS_public: |
4158 | break; | |
c906108c | 4159 | |
c5aa993b JM |
4160 | default: |
4161 | /* Unknown accessibility. Complain and treat it as public. */ | |
4162 | { | |
e2e0b3e5 | 4163 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
4d3c2250 | 4164 | fip->fields->accessibility); |
c5aa993b JM |
4165 | } |
4166 | break; | |
c906108c SS |
4167 | } |
4168 | if (nfields < fip->nbaseclasses) | |
4169 | { | |
4170 | switch (fip->fields->virtuality) | |
4171 | { | |
c5aa993b JM |
4172 | case DW_VIRTUALITY_virtual: |
4173 | case DW_VIRTUALITY_pure_virtual: | |
4174 | SET_TYPE_FIELD_VIRTUAL (type, nfields); | |
4175 | break; | |
c906108c SS |
4176 | } |
4177 | } | |
4178 | fip->fields = fip->fields->next; | |
4179 | } | |
4180 | } | |
4181 | ||
c906108c SS |
4182 | /* Add a member function to the proper fieldlist. */ |
4183 | ||
4184 | static void | |
107d2387 | 4185 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 4186 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 4187 | { |
e7c27a73 | 4188 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4189 | struct attribute *attr; |
4190 | struct fnfieldlist *flp; | |
4191 | int i; | |
4192 | struct fn_field *fnp; | |
4193 | char *fieldname; | |
4194 | char *physname; | |
4195 | struct nextfnfield *new_fnfield; | |
f792889a | 4196 | struct type *this_type; |
c906108c | 4197 | |
2df3850c | 4198 | /* Get name of member function. */ |
39cbfefa DJ |
4199 | fieldname = dwarf2_name (die, cu); |
4200 | if (fieldname == NULL) | |
2df3850c | 4201 | return; |
c906108c | 4202 | |
2df3850c | 4203 | /* Get the mangled name. */ |
e142c38c | 4204 | physname = dwarf2_linkage_name (die, cu); |
c906108c SS |
4205 | |
4206 | /* Look up member function name in fieldlist. */ | |
4207 | for (i = 0; i < fip->nfnfields; i++) | |
4208 | { | |
27bfe10e | 4209 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
4210 | break; |
4211 | } | |
4212 | ||
4213 | /* Create new list element if necessary. */ | |
4214 | if (i < fip->nfnfields) | |
4215 | flp = &fip->fnfieldlists[i]; | |
4216 | else | |
4217 | { | |
4218 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
4219 | { | |
4220 | fip->fnfieldlists = (struct fnfieldlist *) | |
4221 | xrealloc (fip->fnfieldlists, | |
4222 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 4223 | * sizeof (struct fnfieldlist)); |
c906108c | 4224 | if (fip->nfnfields == 0) |
c13c43fd | 4225 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
4226 | } |
4227 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
4228 | flp->name = fieldname; | |
4229 | flp->length = 0; | |
4230 | flp->head = NULL; | |
4231 | fip->nfnfields++; | |
4232 | } | |
4233 | ||
4234 | /* Create a new member function field and chain it to the field list | |
4235 | entry. */ | |
4236 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); | |
b8c9b27d | 4237 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
4238 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
4239 | new_fnfield->next = flp->head; | |
4240 | flp->head = new_fnfield; | |
4241 | flp->length++; | |
4242 | ||
4243 | /* Fill in the member function field info. */ | |
4244 | fnp = &new_fnfield->fnfield; | |
d8151005 DJ |
4245 | /* The name is already allocated along with this objfile, so we don't |
4246 | need to duplicate it for the type. */ | |
4247 | fnp->physname = physname ? physname : ""; | |
c906108c | 4248 | fnp->type = alloc_type (objfile); |
f792889a DJ |
4249 | this_type = read_type_die (die, cu); |
4250 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 4251 | { |
f792889a | 4252 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 4253 | |
f792889a | 4254 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
4255 | of the method itself (TYPE_CODE_METHOD). */ |
4256 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
4257 | TYPE_TARGET_TYPE (this_type), |
4258 | TYPE_FIELDS (this_type), | |
4259 | TYPE_NFIELDS (this_type), | |
4260 | TYPE_VARARGS (this_type)); | |
c906108c SS |
4261 | |
4262 | /* Handle static member functions. | |
c5aa993b JM |
4263 | Dwarf2 has no clean way to discern C++ static and non-static |
4264 | member functions. G++ helps GDB by marking the first | |
4265 | parameter for non-static member functions (which is the | |
4266 | this pointer) as artificial. We obtain this information | |
4267 | from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 4268 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
4269 | fnp->voffset = VOFFSET_STATIC; |
4270 | } | |
4271 | else | |
e2e0b3e5 | 4272 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
4d3c2250 | 4273 | physname); |
c906108c SS |
4274 | |
4275 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 4276 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 4277 | fnp->fcontext = die_containing_type (die, cu); |
c906108c SS |
4278 | |
4279 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const | |
4280 | and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
4281 | ||
4282 | /* Get accessibility. */ | |
e142c38c | 4283 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
4284 | if (attr) |
4285 | { | |
4286 | switch (DW_UNSND (attr)) | |
4287 | { | |
c5aa993b JM |
4288 | case DW_ACCESS_private: |
4289 | fnp->is_private = 1; | |
4290 | break; | |
4291 | case DW_ACCESS_protected: | |
4292 | fnp->is_protected = 1; | |
4293 | break; | |
c906108c SS |
4294 | } |
4295 | } | |
4296 | ||
b02dede2 | 4297 | /* Check for artificial methods. */ |
e142c38c | 4298 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
4299 | if (attr && DW_UNSND (attr) != 0) |
4300 | fnp->is_artificial = 1; | |
4301 | ||
c906108c | 4302 | /* Get index in virtual function table if it is a virtual member function. */ |
e142c38c | 4303 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
c906108c | 4304 | if (attr) |
8e19ed76 PS |
4305 | { |
4306 | /* Support the .debug_loc offsets */ | |
4307 | if (attr_form_is_block (attr)) | |
4308 | { | |
e7c27a73 | 4309 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; |
8e19ed76 | 4310 | } |
3690dd37 | 4311 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 4312 | { |
4d3c2250 | 4313 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
4314 | } |
4315 | else | |
4316 | { | |
4d3c2250 KB |
4317 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
4318 | fieldname); | |
8e19ed76 PS |
4319 | } |
4320 | } | |
c906108c SS |
4321 | } |
4322 | ||
4323 | /* Create the vector of member function fields, and attach it to the type. */ | |
4324 | ||
4325 | static void | |
fba45db2 | 4326 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 4327 | struct dwarf2_cu *cu) |
c906108c SS |
4328 | { |
4329 | struct fnfieldlist *flp; | |
4330 | int total_length = 0; | |
4331 | int i; | |
4332 | ||
4333 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
4334 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
4335 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
4336 | ||
4337 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
4338 | { | |
4339 | struct nextfnfield *nfp = flp->head; | |
4340 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
4341 | int k; | |
4342 | ||
4343 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
4344 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
4345 | fn_flp->fn_fields = (struct fn_field *) | |
4346 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
4347 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 4348 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
4349 | |
4350 | total_length += flp->length; | |
4351 | } | |
4352 | ||
4353 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
4354 | TYPE_NFN_FIELDS_TOTAL (type) = total_length; | |
4355 | } | |
4356 | ||
1168df01 JB |
4357 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
4358 | language, zero otherwise. */ | |
4359 | static int | |
4360 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
4361 | { | |
4362 | static const char vptr[] = "_vptr"; | |
987504bb | 4363 | static const char vtable[] = "vtable"; |
1168df01 | 4364 | |
987504bb JJ |
4365 | /* Look for the C++ and Java forms of the vtable. */ |
4366 | if ((cu->language == language_java | |
4367 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
4368 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
4369 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
4370 | return 1; |
4371 | ||
4372 | return 0; | |
4373 | } | |
4374 | ||
c0dd20ea DJ |
4375 | /* GCC outputs unnamed structures that are really pointers to member |
4376 | functions, with the ABI-specified layout. If DIE (from CU) describes | |
4377 | such a structure, set its type, and return nonzero. Otherwise return | |
61049d3b DJ |
4378 | zero. |
4379 | ||
4380 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
4381 | This is GCC PR debug/28767. */ | |
c0dd20ea | 4382 | |
f792889a | 4383 | static struct type * |
c0dd20ea DJ |
4384 | quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu) |
4385 | { | |
4386 | struct objfile *objfile = cu->objfile; | |
4387 | struct type *type; | |
4388 | struct die_info *pfn_die, *delta_die; | |
4389 | struct attribute *pfn_name, *delta_name; | |
4390 | struct type *pfn_type, *domain_type; | |
4391 | ||
4392 | /* Check for a structure with no name and two children. */ | |
4393 | if (die->tag != DW_TAG_structure_type | |
4394 | || dwarf2_attr (die, DW_AT_name, cu) != NULL | |
4395 | || die->child == NULL | |
4396 | || die->child->sibling == NULL | |
4397 | || (die->child->sibling->sibling != NULL | |
4398 | && die->child->sibling->sibling->tag != DW_TAG_padding)) | |
f792889a | 4399 | return NULL; |
c0dd20ea DJ |
4400 | |
4401 | /* Check for __pfn and __delta members. */ | |
4402 | pfn_die = die->child; | |
4403 | pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu); | |
4404 | if (pfn_die->tag != DW_TAG_member | |
4405 | || pfn_name == NULL | |
4406 | || DW_STRING (pfn_name) == NULL | |
4407 | || strcmp ("__pfn", DW_STRING (pfn_name)) != 0) | |
f792889a | 4408 | return NULL; |
c0dd20ea DJ |
4409 | |
4410 | delta_die = pfn_die->sibling; | |
4411 | delta_name = dwarf2_attr (delta_die, DW_AT_name, cu); | |
4412 | if (delta_die->tag != DW_TAG_member | |
4413 | || delta_name == NULL | |
4414 | || DW_STRING (delta_name) == NULL | |
4415 | || strcmp ("__delta", DW_STRING (delta_name)) != 0) | |
f792889a | 4416 | return NULL; |
c0dd20ea DJ |
4417 | |
4418 | /* Find the type of the method. */ | |
4419 | pfn_type = die_type (pfn_die, cu); | |
4420 | if (pfn_type == NULL | |
4421 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
4422 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
f792889a | 4423 | return NULL; |
c0dd20ea DJ |
4424 | |
4425 | /* Look for the "this" argument. */ | |
4426 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
4427 | if (TYPE_NFIELDS (pfn_type) == 0 | |
4428 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) | |
f792889a | 4429 | return NULL; |
c0dd20ea DJ |
4430 | |
4431 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
4432 | type = alloc_type (objfile); | |
4433 | smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
4434 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), | |
4435 | TYPE_VARARGS (pfn_type)); | |
0d5de010 | 4436 | type = lookup_methodptr_type (type); |
f792889a | 4437 | return set_die_type (die, type, cu); |
c0dd20ea | 4438 | } |
1168df01 | 4439 | |
c906108c SS |
4440 | /* Called when we find the DIE that starts a structure or union scope |
4441 | (definition) to process all dies that define the members of the | |
4442 | structure or union. | |
4443 | ||
4444 | NOTE: we need to call struct_type regardless of whether or not the | |
4445 | DIE has an at_name attribute, since it might be an anonymous | |
4446 | structure or union. This gets the type entered into our set of | |
4447 | user defined types. | |
4448 | ||
4449 | However, if the structure is incomplete (an opaque struct/union) | |
4450 | then suppress creating a symbol table entry for it since gdb only | |
4451 | wants to find the one with the complete definition. Note that if | |
4452 | it is complete, we just call new_symbol, which does it's own | |
4453 | checking about whether the struct/union is anonymous or not (and | |
4454 | suppresses creating a symbol table entry itself). */ | |
4455 | ||
f792889a | 4456 | static struct type * |
134d01f1 | 4457 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4458 | { |
e7c27a73 | 4459 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4460 | struct type *type; |
4461 | struct attribute *attr; | |
39cbfefa | 4462 | char *name; |
0114d602 | 4463 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c | 4464 | |
f792889a DJ |
4465 | type = quirk_gcc_member_function_pointer (die, cu); |
4466 | if (type) | |
4467 | return type; | |
c906108c | 4468 | |
c0dd20ea | 4469 | type = alloc_type (objfile); |
c906108c | 4470 | INIT_CPLUS_SPECIFIC (type); |
39cbfefa DJ |
4471 | name = dwarf2_name (die, cu); |
4472 | if (name != NULL) | |
c906108c | 4473 | { |
987504bb JJ |
4474 | if (cu->language == language_cplus |
4475 | || cu->language == language_java) | |
63d06c5c | 4476 | { |
0114d602 DJ |
4477 | const char *new_prefix = determine_class_name (die, cu); |
4478 | TYPE_TAG_NAME (type) = (char *) new_prefix; | |
63d06c5c DC |
4479 | } |
4480 | else | |
4481 | { | |
d8151005 DJ |
4482 | /* The name is already allocated along with this objfile, so |
4483 | we don't need to duplicate it for the type. */ | |
39cbfefa | 4484 | TYPE_TAG_NAME (type) = name; |
63d06c5c | 4485 | } |
c906108c SS |
4486 | } |
4487 | ||
4488 | if (die->tag == DW_TAG_structure_type) | |
4489 | { | |
4490 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
4491 | } | |
4492 | else if (die->tag == DW_TAG_union_type) | |
4493 | { | |
4494 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
4495 | } | |
4496 | else | |
4497 | { | |
4498 | /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT | |
c5aa993b | 4499 | in gdbtypes.h. */ |
c906108c SS |
4500 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
4501 | } | |
4502 | ||
e142c38c | 4503 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4504 | if (attr) |
4505 | { | |
4506 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
4507 | } | |
4508 | else | |
4509 | { | |
4510 | TYPE_LENGTH (type) = 0; | |
4511 | } | |
4512 | ||
876cecd0 | 4513 | TYPE_STUB_SUPPORTED (type) = 1; |
dc718098 | 4514 | if (die_is_declaration (die, cu)) |
876cecd0 | 4515 | TYPE_STUB (type) = 1; |
dc718098 | 4516 | |
c906108c SS |
4517 | /* We need to add the type field to the die immediately so we don't |
4518 | infinitely recurse when dealing with pointers to the structure | |
4519 | type within the structure itself. */ | |
1c379e20 | 4520 | set_die_type (die, type, cu); |
c906108c | 4521 | |
e142c38c | 4522 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
4523 | { |
4524 | struct field_info fi; | |
4525 | struct die_info *child_die; | |
c906108c SS |
4526 | |
4527 | memset (&fi, 0, sizeof (struct field_info)); | |
4528 | ||
639d11d3 | 4529 | child_die = die->child; |
c906108c SS |
4530 | |
4531 | while (child_die && child_die->tag) | |
4532 | { | |
a9a9bd0f DC |
4533 | if (child_die->tag == DW_TAG_member |
4534 | || child_die->tag == DW_TAG_variable) | |
c906108c | 4535 | { |
a9a9bd0f DC |
4536 | /* NOTE: carlton/2002-11-05: A C++ static data member |
4537 | should be a DW_TAG_member that is a declaration, but | |
4538 | all versions of G++ as of this writing (so through at | |
4539 | least 3.2.1) incorrectly generate DW_TAG_variable | |
4540 | tags for them instead. */ | |
e7c27a73 | 4541 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 4542 | } |
8713b1b1 | 4543 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c SS |
4544 | { |
4545 | /* C++ member function. */ | |
e7c27a73 | 4546 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
4547 | } |
4548 | else if (child_die->tag == DW_TAG_inheritance) | |
4549 | { | |
4550 | /* C++ base class field. */ | |
e7c27a73 | 4551 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 4552 | } |
c906108c SS |
4553 | child_die = sibling_die (child_die); |
4554 | } | |
4555 | ||
4556 | /* Attach fields and member functions to the type. */ | |
4557 | if (fi.nfields) | |
e7c27a73 | 4558 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
4559 | if (fi.nfnfields) |
4560 | { | |
e7c27a73 | 4561 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 4562 | |
c5aa993b | 4563 | /* Get the type which refers to the base class (possibly this |
c906108c SS |
4564 | class itself) which contains the vtable pointer for the current |
4565 | class from the DW_AT_containing_type attribute. */ | |
4566 | ||
e142c38c | 4567 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 4568 | { |
e7c27a73 | 4569 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
4570 | |
4571 | TYPE_VPTR_BASETYPE (type) = t; | |
4572 | if (type == t) | |
4573 | { | |
c906108c SS |
4574 | int i; |
4575 | ||
4576 | /* Our own class provides vtbl ptr. */ | |
4577 | for (i = TYPE_NFIELDS (t) - 1; | |
4578 | i >= TYPE_N_BASECLASSES (t); | |
4579 | --i) | |
4580 | { | |
4581 | char *fieldname = TYPE_FIELD_NAME (t, i); | |
4582 | ||
1168df01 | 4583 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
4584 | { |
4585 | TYPE_VPTR_FIELDNO (type) = i; | |
4586 | break; | |
4587 | } | |
4588 | } | |
4589 | ||
4590 | /* Complain if virtual function table field not found. */ | |
4591 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 4592 | complaint (&symfile_complaints, |
e2e0b3e5 | 4593 | _("virtual function table pointer not found when defining class '%s'"), |
4d3c2250 KB |
4594 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
4595 | ""); | |
c906108c SS |
4596 | } |
4597 | else | |
4598 | { | |
4599 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
4600 | } | |
4601 | } | |
f6235d4c EZ |
4602 | else if (cu->producer |
4603 | && strncmp (cu->producer, | |
4604 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
4605 | { | |
4606 | /* The IBM XLC compiler does not provide direct indication | |
4607 | of the containing type, but the vtable pointer is | |
4608 | always named __vfp. */ | |
4609 | ||
4610 | int i; | |
4611 | ||
4612 | for (i = TYPE_NFIELDS (type) - 1; | |
4613 | i >= TYPE_N_BASECLASSES (type); | |
4614 | --i) | |
4615 | { | |
4616 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
4617 | { | |
4618 | TYPE_VPTR_FIELDNO (type) = i; | |
4619 | TYPE_VPTR_BASETYPE (type) = type; | |
4620 | break; | |
4621 | } | |
4622 | } | |
4623 | } | |
c906108c | 4624 | } |
c906108c | 4625 | } |
63d06c5c | 4626 | |
0114d602 | 4627 | do_cleanups (back_to); |
f792889a | 4628 | return type; |
c906108c SS |
4629 | } |
4630 | ||
134d01f1 DJ |
4631 | static void |
4632 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
4633 | { | |
4634 | struct objfile *objfile = cu->objfile; | |
90aeadfc | 4635 | struct die_info *child_die = die->child; |
f792889a | 4636 | struct type *this_type; |
c906108c | 4637 | |
f792889a DJ |
4638 | this_type = get_die_type (die, cu); |
4639 | if (this_type == NULL) | |
4640 | this_type = read_structure_type (die, cu); | |
c906108c | 4641 | |
90aeadfc DC |
4642 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
4643 | snapshots) has been known to create a die giving a declaration | |
4644 | for a class that has, as a child, a die giving a definition for a | |
4645 | nested class. So we have to process our children even if the | |
4646 | current die is a declaration. Normally, of course, a declaration | |
4647 | won't have any children at all. */ | |
134d01f1 | 4648 | |
90aeadfc DC |
4649 | while (child_die != NULL && child_die->tag) |
4650 | { | |
4651 | if (child_die->tag == DW_TAG_member | |
4652 | || child_die->tag == DW_TAG_variable | |
4653 | || child_die->tag == DW_TAG_inheritance) | |
134d01f1 | 4654 | { |
90aeadfc | 4655 | /* Do nothing. */ |
134d01f1 | 4656 | } |
90aeadfc DC |
4657 | else |
4658 | process_die (child_die, cu); | |
134d01f1 | 4659 | |
90aeadfc | 4660 | child_die = sibling_die (child_die); |
134d01f1 DJ |
4661 | } |
4662 | ||
fa4028e9 JB |
4663 | /* Do not consider external references. According to the DWARF standard, |
4664 | these DIEs are identified by the fact that they have no byte_size | |
4665 | attribute, and a declaration attribute. */ | |
4666 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
4667 | || !die_is_declaration (die, cu)) | |
f792889a | 4668 | new_symbol (die, this_type, cu); |
134d01f1 DJ |
4669 | } |
4670 | ||
4671 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
4672 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 4673 | |
f792889a | 4674 | static struct type * |
134d01f1 | 4675 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4676 | { |
e7c27a73 | 4677 | struct objfile *objfile = cu->objfile; |
c906108c | 4678 | struct type *type; |
c906108c | 4679 | struct attribute *attr; |
0114d602 | 4680 | const char *name; |
134d01f1 | 4681 | |
c906108c SS |
4682 | type = alloc_type (objfile); |
4683 | ||
4684 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
0114d602 | 4685 | name = dwarf2_full_name (die, cu); |
39cbfefa | 4686 | if (name != NULL) |
0114d602 | 4687 | TYPE_TAG_NAME (type) = (char *) name; |
c906108c | 4688 | |
e142c38c | 4689 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4690 | if (attr) |
4691 | { | |
4692 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
4693 | } | |
4694 | else | |
4695 | { | |
4696 | TYPE_LENGTH (type) = 0; | |
4697 | } | |
4698 | ||
137033e9 JB |
4699 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
4700 | declared as private in the package spec, and then defined only | |
4701 | inside the package body. Such types are known as Taft Amendment | |
4702 | Types. When another package uses such a type, an incomplete DIE | |
4703 | may be generated by the compiler. */ | |
02eb380e | 4704 | if (die_is_declaration (die, cu)) |
876cecd0 | 4705 | TYPE_STUB (type) = 1; |
02eb380e | 4706 | |
f792889a | 4707 | return set_die_type (die, type, cu); |
134d01f1 DJ |
4708 | } |
4709 | ||
8176b9b8 | 4710 | /* Determine the name of the type represented by DIE, which should be |
0114d602 DJ |
4711 | a named C++ or Java compound type. Return the name in question, |
4712 | allocated on the objfile obstack. */ | |
8176b9b8 | 4713 | |
0114d602 | 4714 | static const char * |
8176b9b8 DC |
4715 | determine_class_name (struct die_info *die, struct dwarf2_cu *cu) |
4716 | { | |
0114d602 | 4717 | const char *new_prefix = NULL; |
8176b9b8 DC |
4718 | |
4719 | /* If we don't have namespace debug info, guess the name by trying | |
4720 | to demangle the names of members, just like we did in | |
72bf9492 | 4721 | guess_structure_name. */ |
8176b9b8 DC |
4722 | if (!processing_has_namespace_info) |
4723 | { | |
4724 | struct die_info *child; | |
4725 | ||
4726 | for (child = die->child; | |
4727 | child != NULL && child->tag != 0; | |
4728 | child = sibling_die (child)) | |
4729 | { | |
4730 | if (child->tag == DW_TAG_subprogram) | |
4731 | { | |
0114d602 | 4732 | char *phys_prefix |
31c27f77 JJ |
4733 | = language_class_name_from_physname (cu->language_defn, |
4734 | dwarf2_linkage_name | |
8176b9b8 DC |
4735 | (child, cu)); |
4736 | ||
0114d602 DJ |
4737 | if (phys_prefix != NULL) |
4738 | { | |
4739 | new_prefix | |
4740 | = obsavestring (phys_prefix, strlen (phys_prefix), | |
4741 | &cu->objfile->objfile_obstack); | |
4742 | xfree (phys_prefix); | |
4743 | break; | |
4744 | } | |
8176b9b8 DC |
4745 | } |
4746 | } | |
4747 | } | |
4748 | ||
4749 | if (new_prefix == NULL) | |
0114d602 | 4750 | new_prefix = dwarf2_full_name (die, cu); |
8176b9b8 DC |
4751 | |
4752 | return new_prefix; | |
4753 | } | |
4754 | ||
134d01f1 DJ |
4755 | /* Given a pointer to a die which begins an enumeration, process all |
4756 | the dies that define the members of the enumeration, and create the | |
4757 | symbol for the enumeration type. | |
4758 | ||
4759 | NOTE: We reverse the order of the element list. */ | |
4760 | ||
4761 | static void | |
4762 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
4763 | { | |
4764 | struct objfile *objfile = cu->objfile; | |
4765 | struct die_info *child_die; | |
4766 | struct field *fields; | |
134d01f1 DJ |
4767 | struct symbol *sym; |
4768 | int num_fields; | |
4769 | int unsigned_enum = 1; | |
39cbfefa | 4770 | char *name; |
f792889a | 4771 | struct type *this_type; |
134d01f1 | 4772 | |
c906108c SS |
4773 | num_fields = 0; |
4774 | fields = NULL; | |
f792889a DJ |
4775 | this_type = get_die_type (die, cu); |
4776 | if (this_type == NULL) | |
4777 | this_type = read_enumeration_type (die, cu); | |
639d11d3 | 4778 | if (die->child != NULL) |
c906108c | 4779 | { |
639d11d3 | 4780 | child_die = die->child; |
c906108c SS |
4781 | while (child_die && child_die->tag) |
4782 | { | |
4783 | if (child_die->tag != DW_TAG_enumerator) | |
4784 | { | |
e7c27a73 | 4785 | process_die (child_die, cu); |
c906108c SS |
4786 | } |
4787 | else | |
4788 | { | |
39cbfefa DJ |
4789 | name = dwarf2_name (child_die, cu); |
4790 | if (name) | |
c906108c | 4791 | { |
f792889a | 4792 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
4793 | if (SYMBOL_VALUE (sym) < 0) |
4794 | unsigned_enum = 0; | |
4795 | ||
4796 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
4797 | { | |
4798 | fields = (struct field *) | |
4799 | xrealloc (fields, | |
4800 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 4801 | * sizeof (struct field)); |
c906108c SS |
4802 | } |
4803 | ||
3567439c | 4804 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 4805 | FIELD_TYPE (fields[num_fields]) = NULL; |
d6a843b5 | 4806 | SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
4807 | FIELD_BITSIZE (fields[num_fields]) = 0; |
4808 | ||
4809 | num_fields++; | |
4810 | } | |
4811 | } | |
4812 | ||
4813 | child_die = sibling_die (child_die); | |
4814 | } | |
4815 | ||
4816 | if (num_fields) | |
4817 | { | |
f792889a DJ |
4818 | TYPE_NFIELDS (this_type) = num_fields; |
4819 | TYPE_FIELDS (this_type) = (struct field *) | |
4820 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
4821 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 4822 | sizeof (struct field) * num_fields); |
b8c9b27d | 4823 | xfree (fields); |
c906108c SS |
4824 | } |
4825 | if (unsigned_enum) | |
876cecd0 | 4826 | TYPE_UNSIGNED (this_type) = 1; |
c906108c | 4827 | } |
134d01f1 | 4828 | |
f792889a | 4829 | new_symbol (die, this_type, cu); |
c906108c SS |
4830 | } |
4831 | ||
4832 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
4833 | the DIE's type field. For now, this only handles one dimensional | |
4834 | arrays. */ | |
4835 | ||
f792889a | 4836 | static struct type * |
e7c27a73 | 4837 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4838 | { |
e7c27a73 | 4839 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4840 | struct die_info *child_die; |
4841 | struct type *type = NULL; | |
4842 | struct type *element_type, *range_type, *index_type; | |
4843 | struct type **range_types = NULL; | |
4844 | struct attribute *attr; | |
4845 | int ndim = 0; | |
4846 | struct cleanup *back_to; | |
39cbfefa | 4847 | char *name; |
c906108c | 4848 | |
e7c27a73 | 4849 | element_type = die_type (die, cu); |
c906108c SS |
4850 | |
4851 | /* Irix 6.2 native cc creates array types without children for | |
4852 | arrays with unspecified length. */ | |
639d11d3 | 4853 | if (die->child == NULL) |
c906108c | 4854 | { |
46bf5051 | 4855 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 4856 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
4857 | type = create_array_type (NULL, element_type, range_type); |
4858 | return set_die_type (die, type, cu); | |
c906108c SS |
4859 | } |
4860 | ||
4861 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 4862 | child_die = die->child; |
c906108c SS |
4863 | while (child_die && child_die->tag) |
4864 | { | |
4865 | if (child_die->tag == DW_TAG_subrange_type) | |
4866 | { | |
f792889a DJ |
4867 | struct type *child_type = read_type_die (child_die, cu); |
4868 | if (child_type != NULL) | |
a02abb62 JB |
4869 | { |
4870 | /* The range type was succesfully read. Save it for | |
4871 | the array type creation. */ | |
4872 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) | |
4873 | { | |
4874 | range_types = (struct type **) | |
4875 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
4876 | * sizeof (struct type *)); | |
4877 | if (ndim == 0) | |
4878 | make_cleanup (free_current_contents, &range_types); | |
4879 | } | |
f792889a | 4880 | range_types[ndim++] = child_type; |
a02abb62 | 4881 | } |
c906108c SS |
4882 | } |
4883 | child_die = sibling_die (child_die); | |
4884 | } | |
4885 | ||
4886 | /* Dwarf2 dimensions are output from left to right, create the | |
4887 | necessary array types in backwards order. */ | |
7ca2d3a3 | 4888 | |
c906108c | 4889 | type = element_type; |
7ca2d3a3 DL |
4890 | |
4891 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
4892 | { | |
4893 | int i = 0; | |
4894 | while (i < ndim) | |
4895 | type = create_array_type (NULL, type, range_types[i++]); | |
4896 | } | |
4897 | else | |
4898 | { | |
4899 | while (ndim-- > 0) | |
4900 | type = create_array_type (NULL, type, range_types[ndim]); | |
4901 | } | |
c906108c | 4902 | |
f5f8a009 EZ |
4903 | /* Understand Dwarf2 support for vector types (like they occur on |
4904 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
4905 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
4906 | custom vendor extension. The main difference between a regular | |
4907 | array and the vector variant is that vectors are passed by value | |
4908 | to functions. */ | |
e142c38c | 4909 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 4910 | if (attr) |
ea37ba09 | 4911 | make_vector_type (type); |
f5f8a009 | 4912 | |
39cbfefa DJ |
4913 | name = dwarf2_name (die, cu); |
4914 | if (name) | |
4915 | TYPE_NAME (type) = name; | |
714e295e | 4916 | |
c906108c SS |
4917 | do_cleanups (back_to); |
4918 | ||
4919 | /* Install the type in the die. */ | |
f792889a | 4920 | return set_die_type (die, type, cu); |
c906108c SS |
4921 | } |
4922 | ||
7ca2d3a3 DL |
4923 | static enum dwarf_array_dim_ordering |
4924 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) | |
4925 | { | |
4926 | struct attribute *attr; | |
4927 | ||
4928 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
4929 | ||
4930 | if (attr) return DW_SND (attr); | |
4931 | ||
4932 | /* | |
4933 | GNU F77 is a special case, as at 08/2004 array type info is the | |
4934 | opposite order to the dwarf2 specification, but data is still | |
4935 | laid out as per normal fortran. | |
4936 | ||
4937 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need | |
4938 | version checking. | |
4939 | */ | |
4940 | ||
4941 | if (cu->language == language_fortran && | |
4942 | cu->producer && strstr (cu->producer, "GNU F77")) | |
4943 | { | |
4944 | return DW_ORD_row_major; | |
4945 | } | |
4946 | ||
4947 | switch (cu->language_defn->la_array_ordering) | |
4948 | { | |
4949 | case array_column_major: | |
4950 | return DW_ORD_col_major; | |
4951 | case array_row_major: | |
4952 | default: | |
4953 | return DW_ORD_row_major; | |
4954 | }; | |
4955 | } | |
4956 | ||
72019c9c GM |
4957 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
4958 | the DIE's type field. */ | |
4959 | ||
f792889a | 4960 | static struct type * |
72019c9c GM |
4961 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
4962 | { | |
f792889a DJ |
4963 | struct type *set_type = create_set_type (NULL, die_type (die, cu)); |
4964 | ||
4965 | return set_die_type (die, set_type, cu); | |
72019c9c | 4966 | } |
7ca2d3a3 | 4967 | |
c906108c SS |
4968 | /* First cut: install each common block member as a global variable. */ |
4969 | ||
4970 | static void | |
e7c27a73 | 4971 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
4972 | { |
4973 | struct die_info *child_die; | |
4974 | struct attribute *attr; | |
4975 | struct symbol *sym; | |
4976 | CORE_ADDR base = (CORE_ADDR) 0; | |
4977 | ||
e142c38c | 4978 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
4979 | if (attr) |
4980 | { | |
8e19ed76 PS |
4981 | /* Support the .debug_loc offsets */ |
4982 | if (attr_form_is_block (attr)) | |
4983 | { | |
e7c27a73 | 4984 | base = decode_locdesc (DW_BLOCK (attr), cu); |
8e19ed76 | 4985 | } |
3690dd37 | 4986 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 4987 | { |
4d3c2250 | 4988 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
4989 | } |
4990 | else | |
4991 | { | |
4d3c2250 KB |
4992 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
4993 | "common block member"); | |
8e19ed76 | 4994 | } |
c906108c | 4995 | } |
639d11d3 | 4996 | if (die->child != NULL) |
c906108c | 4997 | { |
639d11d3 | 4998 | child_die = die->child; |
c906108c SS |
4999 | while (child_die && child_die->tag) |
5000 | { | |
e7c27a73 | 5001 | sym = new_symbol (child_die, NULL, cu); |
e142c38c | 5002 | attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu); |
c906108c SS |
5003 | if (attr) |
5004 | { | |
5005 | SYMBOL_VALUE_ADDRESS (sym) = | |
e7c27a73 | 5006 | base + decode_locdesc (DW_BLOCK (attr), cu); |
c906108c SS |
5007 | add_symbol_to_list (sym, &global_symbols); |
5008 | } | |
5009 | child_die = sibling_die (child_die); | |
5010 | } | |
5011 | } | |
5012 | } | |
5013 | ||
0114d602 | 5014 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 5015 | |
0114d602 DJ |
5016 | static struct type * |
5017 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 5018 | { |
e7c27a73 | 5019 | struct objfile *objfile = cu->objfile; |
0114d602 | 5020 | const char *previous_prefix, *name; |
9219021c | 5021 | int is_anonymous; |
0114d602 DJ |
5022 | struct type *type; |
5023 | ||
5024 | /* For extensions, reuse the type of the original namespace. */ | |
5025 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
5026 | { | |
5027 | struct die_info *ext_die; | |
5028 | struct dwarf2_cu *ext_cu = cu; | |
5029 | ext_die = dwarf2_extension (die, &ext_cu); | |
5030 | type = read_type_die (ext_die, ext_cu); | |
5031 | return set_die_type (die, type, cu); | |
5032 | } | |
9219021c | 5033 | |
e142c38c | 5034 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
5035 | |
5036 | /* Now build the name of the current namespace. */ | |
5037 | ||
0114d602 DJ |
5038 | previous_prefix = determine_prefix (die, cu); |
5039 | if (previous_prefix[0] != '\0') | |
5040 | name = typename_concat (&objfile->objfile_obstack, | |
5041 | previous_prefix, name, cu); | |
5042 | ||
5043 | /* Create the type. */ | |
5044 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
5045 | objfile); | |
5046 | TYPE_NAME (type) = (char *) name; | |
5047 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
5048 | ||
5049 | set_die_type (die, type, cu); | |
5050 | ||
5051 | return type; | |
5052 | } | |
5053 | ||
5054 | /* Read a C++ namespace. */ | |
5055 | ||
5056 | static void | |
5057 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
5058 | { | |
5059 | struct objfile *objfile = cu->objfile; | |
5060 | const char *name; | |
5061 | int is_anonymous; | |
9219021c | 5062 | |
5c4e30ca DC |
5063 | /* Add a symbol associated to this if we haven't seen the namespace |
5064 | before. Also, add a using directive if it's an anonymous | |
5065 | namespace. */ | |
9219021c | 5066 | |
f2f0e013 | 5067 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
5068 | { |
5069 | struct type *type; | |
5070 | ||
0114d602 | 5071 | type = read_type_die (die, cu); |
e7c27a73 | 5072 | new_symbol (die, type, cu); |
5c4e30ca | 5073 | |
0114d602 | 5074 | name = namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 5075 | if (is_anonymous) |
0114d602 DJ |
5076 | { |
5077 | const char *previous_prefix = determine_prefix (die, cu); | |
794684b6 | 5078 | cp_add_using_directive (previous_prefix, TYPE_NAME (type)); |
0114d602 | 5079 | } |
5c4e30ca | 5080 | } |
9219021c | 5081 | |
639d11d3 | 5082 | if (die->child != NULL) |
d9fa45fe | 5083 | { |
639d11d3 | 5084 | struct die_info *child_die = die->child; |
d9fa45fe DC |
5085 | |
5086 | while (child_die && child_die->tag) | |
5087 | { | |
e7c27a73 | 5088 | process_die (child_die, cu); |
d9fa45fe DC |
5089 | child_die = sibling_die (child_die); |
5090 | } | |
5091 | } | |
38d518c9 EZ |
5092 | } |
5093 | ||
5d7cb8df JK |
5094 | /* Read a Fortran module. */ |
5095 | ||
5096 | static void | |
5097 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
5098 | { | |
5099 | struct die_info *child_die = die->child; | |
5100 | ||
5101 | /* FIXME: Support the separate Fortran module namespaces. */ | |
5102 | ||
5103 | while (child_die && child_die->tag) | |
5104 | { | |
5105 | process_die (child_die, cu); | |
5106 | child_die = sibling_die (child_die); | |
5107 | } | |
5108 | } | |
5109 | ||
38d518c9 EZ |
5110 | /* Return the name of the namespace represented by DIE. Set |
5111 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
5112 | namespace. */ | |
5113 | ||
5114 | static const char * | |
e142c38c | 5115 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
5116 | { |
5117 | struct die_info *current_die; | |
5118 | const char *name = NULL; | |
5119 | ||
5120 | /* Loop through the extensions until we find a name. */ | |
5121 | ||
5122 | for (current_die = die; | |
5123 | current_die != NULL; | |
f2f0e013 | 5124 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 5125 | { |
e142c38c | 5126 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
5127 | if (name != NULL) |
5128 | break; | |
5129 | } | |
5130 | ||
5131 | /* Is it an anonymous namespace? */ | |
5132 | ||
5133 | *is_anonymous = (name == NULL); | |
5134 | if (*is_anonymous) | |
5135 | name = "(anonymous namespace)"; | |
5136 | ||
5137 | return name; | |
d9fa45fe DC |
5138 | } |
5139 | ||
c906108c SS |
5140 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
5141 | the user defined type vector. */ | |
5142 | ||
f792889a | 5143 | static struct type * |
e7c27a73 | 5144 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5145 | { |
5e2b427d | 5146 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 5147 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 5148 | struct type *type; |
8b2dbe47 KB |
5149 | struct attribute *attr_byte_size; |
5150 | struct attribute *attr_address_class; | |
5151 | int byte_size, addr_class; | |
c906108c | 5152 | |
e7c27a73 | 5153 | type = lookup_pointer_type (die_type (die, cu)); |
8b2dbe47 | 5154 | |
e142c38c | 5155 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
5156 | if (attr_byte_size) |
5157 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 5158 | else |
8b2dbe47 KB |
5159 | byte_size = cu_header->addr_size; |
5160 | ||
e142c38c | 5161 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
5162 | if (attr_address_class) |
5163 | addr_class = DW_UNSND (attr_address_class); | |
5164 | else | |
5165 | addr_class = DW_ADDR_none; | |
5166 | ||
5167 | /* If the pointer size or address class is different than the | |
5168 | default, create a type variant marked as such and set the | |
5169 | length accordingly. */ | |
5170 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 5171 | { |
5e2b427d | 5172 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
5173 | { |
5174 | int type_flags; | |
5175 | ||
849957d9 | 5176 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 5177 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
5178 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
5179 | == 0); | |
8b2dbe47 KB |
5180 | type = make_type_with_address_space (type, type_flags); |
5181 | } | |
5182 | else if (TYPE_LENGTH (type) != byte_size) | |
5183 | { | |
e2e0b3e5 | 5184 | complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size); |
8b2dbe47 KB |
5185 | } |
5186 | else { | |
5187 | /* Should we also complain about unhandled address classes? */ | |
5188 | } | |
c906108c | 5189 | } |
8b2dbe47 KB |
5190 | |
5191 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 5192 | return set_die_type (die, type, cu); |
c906108c SS |
5193 | } |
5194 | ||
5195 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
5196 | the user defined type vector. */ | |
5197 | ||
f792889a | 5198 | static struct type * |
e7c27a73 | 5199 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5200 | { |
e7c27a73 | 5201 | struct objfile *objfile = cu->objfile; |
c906108c SS |
5202 | struct type *type; |
5203 | struct type *to_type; | |
5204 | struct type *domain; | |
5205 | ||
e7c27a73 DJ |
5206 | to_type = die_type (die, cu); |
5207 | domain = die_containing_type (die, cu); | |
0d5de010 DJ |
5208 | |
5209 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) | |
5210 | type = lookup_methodptr_type (to_type); | |
5211 | else | |
5212 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 5213 | |
f792889a | 5214 | return set_die_type (die, type, cu); |
c906108c SS |
5215 | } |
5216 | ||
5217 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
5218 | the user defined type vector. */ | |
5219 | ||
f792889a | 5220 | static struct type * |
e7c27a73 | 5221 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5222 | { |
e7c27a73 | 5223 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
5224 | struct type *type; |
5225 | struct attribute *attr; | |
5226 | ||
e7c27a73 | 5227 | type = lookup_reference_type (die_type (die, cu)); |
e142c38c | 5228 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
5229 | if (attr) |
5230 | { | |
5231 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
5232 | } | |
5233 | else | |
5234 | { | |
107d2387 | 5235 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 5236 | } |
f792889a | 5237 | return set_die_type (die, type, cu); |
c906108c SS |
5238 | } |
5239 | ||
f792889a | 5240 | static struct type * |
e7c27a73 | 5241 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5242 | { |
f792889a | 5243 | struct type *base_type, *cv_type; |
c906108c | 5244 | |
e7c27a73 | 5245 | base_type = die_type (die, cu); |
f792889a DJ |
5246 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
5247 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
5248 | } |
5249 | ||
f792889a | 5250 | static struct type * |
e7c27a73 | 5251 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5252 | { |
f792889a | 5253 | struct type *base_type, *cv_type; |
c906108c | 5254 | |
e7c27a73 | 5255 | base_type = die_type (die, cu); |
f792889a DJ |
5256 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
5257 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
5258 | } |
5259 | ||
5260 | /* Extract all information from a DW_TAG_string_type DIE and add to | |
5261 | the user defined type vector. It isn't really a user defined type, | |
5262 | but it behaves like one, with other DIE's using an AT_user_def_type | |
5263 | attribute to reference it. */ | |
5264 | ||
f792889a | 5265 | static struct type * |
e7c27a73 | 5266 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5267 | { |
e7c27a73 | 5268 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 5269 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
5270 | struct type *type, *range_type, *index_type, *char_type; |
5271 | struct attribute *attr; | |
5272 | unsigned int length; | |
5273 | ||
e142c38c | 5274 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
5275 | if (attr) |
5276 | { | |
5277 | length = DW_UNSND (attr); | |
5278 | } | |
5279 | else | |
5280 | { | |
b21b22e0 | 5281 | /* check for the DW_AT_byte_size attribute */ |
e142c38c | 5282 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
5283 | if (attr) |
5284 | { | |
5285 | length = DW_UNSND (attr); | |
5286 | } | |
5287 | else | |
5288 | { | |
5289 | length = 1; | |
5290 | } | |
c906108c | 5291 | } |
6ccb9162 | 5292 | |
46bf5051 | 5293 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 5294 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
5295 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
5296 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 5297 | |
f792889a | 5298 | return set_die_type (die, type, cu); |
c906108c SS |
5299 | } |
5300 | ||
5301 | /* Handle DIES due to C code like: | |
5302 | ||
5303 | struct foo | |
c5aa993b JM |
5304 | { |
5305 | int (*funcp)(int a, long l); | |
5306 | int b; | |
5307 | }; | |
c906108c SS |
5308 | |
5309 | ('funcp' generates a DW_TAG_subroutine_type DIE) | |
c5aa993b | 5310 | */ |
c906108c | 5311 | |
f792889a | 5312 | static struct type * |
e7c27a73 | 5313 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
5314 | { |
5315 | struct type *type; /* Type that this function returns */ | |
5316 | struct type *ftype; /* Function that returns above type */ | |
5317 | struct attribute *attr; | |
5318 | ||
e7c27a73 | 5319 | type = die_type (die, cu); |
0c8b41f1 | 5320 | ftype = lookup_function_type (type); |
c906108c | 5321 | |
5b8101ae | 5322 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 5323 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 5324 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 5325 | || cu->language == language_cplus |
5b8101ae PM |
5326 | || cu->language == language_java |
5327 | || cu->language == language_pascal) | |
876cecd0 | 5328 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 5329 | |
c055b101 CV |
5330 | /* Store the calling convention in the type if it's available in |
5331 | the subroutine die. Otherwise set the calling convention to | |
5332 | the default value DW_CC_normal. */ | |
5333 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
5334 | TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal; | |
5335 | ||
639d11d3 | 5336 | if (die->child != NULL) |
c906108c SS |
5337 | { |
5338 | struct die_info *child_die; | |
5339 | int nparams = 0; | |
5340 | int iparams = 0; | |
5341 | ||
5342 | /* Count the number of parameters. | |
5343 | FIXME: GDB currently ignores vararg functions, but knows about | |
5344 | vararg member functions. */ | |
639d11d3 | 5345 | child_die = die->child; |
c906108c SS |
5346 | while (child_die && child_die->tag) |
5347 | { | |
5348 | if (child_die->tag == DW_TAG_formal_parameter) | |
5349 | nparams++; | |
5350 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 5351 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
5352 | child_die = sibling_die (child_die); |
5353 | } | |
5354 | ||
5355 | /* Allocate storage for parameters and fill them in. */ | |
5356 | TYPE_NFIELDS (ftype) = nparams; | |
5357 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 5358 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 5359 | |
639d11d3 | 5360 | child_die = die->child; |
c906108c SS |
5361 | while (child_die && child_die->tag) |
5362 | { | |
5363 | if (child_die->tag == DW_TAG_formal_parameter) | |
5364 | { | |
5365 | /* Dwarf2 has no clean way to discern C++ static and non-static | |
c5aa993b JM |
5366 | member functions. G++ helps GDB by marking the first |
5367 | parameter for non-static member functions (which is the | |
5368 | this pointer) as artificial. We pass this information | |
5369 | to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ | |
e142c38c | 5370 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
5371 | if (attr) |
5372 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
5373 | else | |
5374 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
e7c27a73 | 5375 | TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu); |
c906108c SS |
5376 | iparams++; |
5377 | } | |
5378 | child_die = sibling_die (child_die); | |
5379 | } | |
5380 | } | |
5381 | ||
f792889a | 5382 | return set_die_type (die, ftype, cu); |
c906108c SS |
5383 | } |
5384 | ||
f792889a | 5385 | static struct type * |
e7c27a73 | 5386 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5387 | { |
e7c27a73 | 5388 | struct objfile *objfile = cu->objfile; |
2f038fcb | 5389 | struct attribute *attr; |
0114d602 | 5390 | const char *name = NULL; |
f792889a | 5391 | struct type *this_type; |
c906108c | 5392 | |
0114d602 | 5393 | name = dwarf2_full_name (die, cu); |
f792889a | 5394 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 DJ |
5395 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
5396 | TYPE_NAME (this_type) = (char *) name; | |
f792889a DJ |
5397 | set_die_type (die, this_type, cu); |
5398 | TYPE_TARGET_TYPE (this_type) = die_type (die, cu); | |
5399 | return this_type; | |
c906108c SS |
5400 | } |
5401 | ||
5402 | /* Find a representation of a given base type and install | |
5403 | it in the TYPE field of the die. */ | |
5404 | ||
f792889a | 5405 | static struct type * |
e7c27a73 | 5406 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 5407 | { |
e7c27a73 | 5408 | struct objfile *objfile = cu->objfile; |
c906108c SS |
5409 | struct type *type; |
5410 | struct attribute *attr; | |
5411 | int encoding = 0, size = 0; | |
39cbfefa | 5412 | char *name; |
6ccb9162 UW |
5413 | enum type_code code = TYPE_CODE_INT; |
5414 | int type_flags = 0; | |
5415 | struct type *target_type = NULL; | |
c906108c | 5416 | |
e142c38c | 5417 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
5418 | if (attr) |
5419 | { | |
5420 | encoding = DW_UNSND (attr); | |
5421 | } | |
e142c38c | 5422 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
5423 | if (attr) |
5424 | { | |
5425 | size = DW_UNSND (attr); | |
5426 | } | |
39cbfefa | 5427 | name = dwarf2_name (die, cu); |
6ccb9162 | 5428 | if (!name) |
c906108c | 5429 | { |
6ccb9162 UW |
5430 | complaint (&symfile_complaints, |
5431 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 5432 | } |
6ccb9162 UW |
5433 | |
5434 | switch (encoding) | |
c906108c | 5435 | { |
6ccb9162 UW |
5436 | case DW_ATE_address: |
5437 | /* Turn DW_ATE_address into a void * pointer. */ | |
5438 | code = TYPE_CODE_PTR; | |
5439 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5440 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
5441 | break; | |
5442 | case DW_ATE_boolean: | |
5443 | code = TYPE_CODE_BOOL; | |
5444 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5445 | break; | |
5446 | case DW_ATE_complex_float: | |
5447 | code = TYPE_CODE_COMPLEX; | |
5448 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
5449 | break; | |
5450 | case DW_ATE_decimal_float: | |
5451 | code = TYPE_CODE_DECFLOAT; | |
5452 | break; | |
5453 | case DW_ATE_float: | |
5454 | code = TYPE_CODE_FLT; | |
5455 | break; | |
5456 | case DW_ATE_signed: | |
5457 | break; | |
5458 | case DW_ATE_unsigned: | |
5459 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5460 | break; | |
5461 | case DW_ATE_signed_char: | |
868a0084 PM |
5462 | if (cu->language == language_ada || cu->language == language_m2 |
5463 | || cu->language == language_pascal) | |
6ccb9162 UW |
5464 | code = TYPE_CODE_CHAR; |
5465 | break; | |
5466 | case DW_ATE_unsigned_char: | |
868a0084 PM |
5467 | if (cu->language == language_ada || cu->language == language_m2 |
5468 | || cu->language == language_pascal) | |
6ccb9162 UW |
5469 | code = TYPE_CODE_CHAR; |
5470 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5471 | break; | |
5472 | default: | |
5473 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
5474 | dwarf_type_encoding_name (encoding)); | |
5475 | break; | |
c906108c | 5476 | } |
6ccb9162 | 5477 | |
0114d602 DJ |
5478 | type = init_type (code, size, type_flags, NULL, objfile); |
5479 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
5480 | TYPE_TARGET_TYPE (type) = target_type; |
5481 | ||
0114d602 | 5482 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 5483 | TYPE_NOSIGN (type) = 1; |
0114d602 | 5484 | |
f792889a | 5485 | return set_die_type (die, type, cu); |
c906108c SS |
5486 | } |
5487 | ||
a02abb62 JB |
5488 | /* Read the given DW_AT_subrange DIE. */ |
5489 | ||
f792889a | 5490 | static struct type * |
a02abb62 JB |
5491 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
5492 | { | |
5e2b427d | 5493 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
a02abb62 JB |
5494 | struct type *base_type; |
5495 | struct type *range_type; | |
5496 | struct attribute *attr; | |
5497 | int low = 0; | |
5498 | int high = -1; | |
39cbfefa | 5499 | char *name; |
a02abb62 | 5500 | |
a02abb62 | 5501 | base_type = die_type (die, cu); |
3d1f72c2 | 5502 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
a02abb62 JB |
5503 | { |
5504 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5505 | _("DW_AT_type missing from DW_TAG_subrange_type")); |
17a912b6 | 5506 | base_type |
5e2b427d | 5507 | = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8, |
6ccb9162 | 5508 | 0, NULL, cu->objfile); |
a02abb62 JB |
5509 | } |
5510 | ||
e142c38c | 5511 | if (cu->language == language_fortran) |
a02abb62 JB |
5512 | { |
5513 | /* FORTRAN implies a lower bound of 1, if not given. */ | |
5514 | low = 1; | |
5515 | } | |
5516 | ||
dd5e6932 DJ |
5517 | /* FIXME: For variable sized arrays either of these could be |
5518 | a variable rather than a constant value. We'll allow it, | |
5519 | but we don't know how to handle it. */ | |
e142c38c | 5520 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 JB |
5521 | if (attr) |
5522 | low = dwarf2_get_attr_constant_value (attr, 0); | |
5523 | ||
e142c38c | 5524 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 JB |
5525 | if (attr) |
5526 | { | |
5527 | if (attr->form == DW_FORM_block1) | |
5528 | { | |
5529 | /* GCC encodes arrays with unspecified or dynamic length | |
5530 | with a DW_FORM_block1 attribute. | |
5531 | FIXME: GDB does not yet know how to handle dynamic | |
5532 | arrays properly, treat them as arrays with unspecified | |
5533 | length for now. | |
5534 | ||
5535 | FIXME: jimb/2003-09-22: GDB does not really know | |
5536 | how to handle arrays of unspecified length | |
5537 | either; we just represent them as zero-length | |
5538 | arrays. Choose an appropriate upper bound given | |
5539 | the lower bound we've computed above. */ | |
5540 | high = low - 1; | |
5541 | } | |
5542 | else | |
5543 | high = dwarf2_get_attr_constant_value (attr, 1); | |
5544 | } | |
5545 | ||
5546 | range_type = create_range_type (NULL, base_type, low, high); | |
5547 | ||
39cbfefa DJ |
5548 | name = dwarf2_name (die, cu); |
5549 | if (name) | |
5550 | TYPE_NAME (range_type) = name; | |
a02abb62 | 5551 | |
e142c38c | 5552 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
5553 | if (attr) |
5554 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
5555 | ||
f792889a | 5556 | return set_die_type (die, range_type, cu); |
a02abb62 JB |
5557 | } |
5558 | ||
f792889a | 5559 | static struct type * |
81a17f79 JB |
5560 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
5561 | { | |
5562 | struct type *type; | |
81a17f79 | 5563 | |
81a17f79 JB |
5564 | /* For now, we only support the C meaning of an unspecified type: void. */ |
5565 | ||
0114d602 DJ |
5566 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
5567 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 5568 | |
f792889a | 5569 | return set_die_type (die, type, cu); |
81a17f79 | 5570 | } |
a02abb62 | 5571 | |
51545339 DJ |
5572 | /* Trivial hash function for die_info: the hash value of a DIE |
5573 | is its offset in .debug_info for this objfile. */ | |
5574 | ||
5575 | static hashval_t | |
5576 | die_hash (const void *item) | |
5577 | { | |
5578 | const struct die_info *die = item; | |
5579 | return die->offset; | |
5580 | } | |
5581 | ||
5582 | /* Trivial comparison function for die_info structures: two DIEs | |
5583 | are equal if they have the same offset. */ | |
5584 | ||
5585 | static int | |
5586 | die_eq (const void *item_lhs, const void *item_rhs) | |
5587 | { | |
5588 | const struct die_info *die_lhs = item_lhs; | |
5589 | const struct die_info *die_rhs = item_rhs; | |
5590 | return die_lhs->offset == die_rhs->offset; | |
5591 | } | |
5592 | ||
c906108c SS |
5593 | /* Read a whole compilation unit into a linked list of dies. */ |
5594 | ||
f9aca02d | 5595 | static struct die_info * |
fe1b8b76 | 5596 | read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu) |
c906108c | 5597 | { |
51545339 DJ |
5598 | cu->die_hash |
5599 | = htab_create_alloc_ex (cu->header.length / 12, | |
5600 | die_hash, | |
5601 | die_eq, | |
5602 | NULL, | |
5603 | &cu->comp_unit_obstack, | |
5604 | hashtab_obstack_allocate, | |
5605 | dummy_obstack_deallocate); | |
5606 | ||
e7c27a73 | 5607 | return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL); |
639d11d3 DC |
5608 | } |
5609 | ||
d97bc12b DE |
5610 | /* Main entry point for reading a DIE and all children. |
5611 | Read the DIE and dump it if requested. */ | |
5612 | ||
5613 | static struct die_info * | |
5614 | read_die_and_children (gdb_byte *info_ptr, bfd *abfd, | |
5615 | struct dwarf2_cu *cu, | |
5616 | gdb_byte **new_info_ptr, | |
5617 | struct die_info *parent) | |
5618 | { | |
5619 | struct die_info *result = read_die_and_children_1 (info_ptr, abfd, cu, | |
5620 | new_info_ptr, parent); | |
5621 | ||
5622 | if (dwarf2_die_debug) | |
5623 | { | |
5624 | fprintf_unfiltered (gdb_stdlog, "Read die from .debug_info:\n"); | |
5625 | dump_die (result, dwarf2_die_debug); | |
5626 | } | |
5627 | ||
5628 | return result; | |
5629 | } | |
5630 | ||
639d11d3 DC |
5631 | /* Read a single die and all its descendents. Set the die's sibling |
5632 | field to NULL; set other fields in the die correctly, and set all | |
5633 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
5634 | location of the info_ptr after reading all of those dies. PARENT | |
5635 | is the parent of the die in question. */ | |
5636 | ||
5637 | static struct die_info * | |
d97bc12b DE |
5638 | read_die_and_children_1 (gdb_byte *info_ptr, bfd *abfd, |
5639 | struct dwarf2_cu *cu, | |
5640 | gdb_byte **new_info_ptr, | |
5641 | struct die_info *parent) | |
639d11d3 DC |
5642 | { |
5643 | struct die_info *die; | |
fe1b8b76 | 5644 | gdb_byte *cur_ptr; |
639d11d3 DC |
5645 | int has_children; |
5646 | ||
e7c27a73 | 5647 | cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children); |
1d325ec1 DJ |
5648 | if (die == NULL) |
5649 | { | |
5650 | *new_info_ptr = cur_ptr; | |
5651 | return NULL; | |
5652 | } | |
51545339 | 5653 | store_in_ref_table (die, cu); |
639d11d3 DC |
5654 | |
5655 | if (has_children) | |
5656 | { | |
e7c27a73 | 5657 | die->child = read_die_and_siblings (cur_ptr, abfd, cu, |
639d11d3 DC |
5658 | new_info_ptr, die); |
5659 | } | |
5660 | else | |
5661 | { | |
5662 | die->child = NULL; | |
5663 | *new_info_ptr = cur_ptr; | |
5664 | } | |
5665 | ||
5666 | die->sibling = NULL; | |
5667 | die->parent = parent; | |
5668 | return die; | |
5669 | } | |
5670 | ||
5671 | /* Read a die, all of its descendents, and all of its siblings; set | |
5672 | all of the fields of all of the dies correctly. Arguments are as | |
5673 | in read_die_and_children. */ | |
5674 | ||
5675 | static struct die_info * | |
fe1b8b76 | 5676 | read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 5677 | struct dwarf2_cu *cu, |
fe1b8b76 | 5678 | gdb_byte **new_info_ptr, |
639d11d3 DC |
5679 | struct die_info *parent) |
5680 | { | |
5681 | struct die_info *first_die, *last_sibling; | |
fe1b8b76 | 5682 | gdb_byte *cur_ptr; |
639d11d3 | 5683 | |
c906108c | 5684 | cur_ptr = info_ptr; |
639d11d3 DC |
5685 | first_die = last_sibling = NULL; |
5686 | ||
5687 | while (1) | |
c906108c | 5688 | { |
639d11d3 | 5689 | struct die_info *die |
d97bc12b | 5690 | = read_die_and_children_1 (cur_ptr, abfd, cu, &cur_ptr, parent); |
639d11d3 | 5691 | |
1d325ec1 | 5692 | if (die == NULL) |
c906108c | 5693 | { |
639d11d3 DC |
5694 | *new_info_ptr = cur_ptr; |
5695 | return first_die; | |
c906108c | 5696 | } |
1d325ec1 DJ |
5697 | |
5698 | if (!first_die) | |
5699 | first_die = die; | |
c906108c | 5700 | else |
1d325ec1 DJ |
5701 | last_sibling->sibling = die; |
5702 | ||
5703 | last_sibling = die; | |
c906108c | 5704 | } |
c906108c SS |
5705 | } |
5706 | ||
c906108c SS |
5707 | /* In DWARF version 2, the description of the debugging information is |
5708 | stored in a separate .debug_abbrev section. Before we read any | |
5709 | dies from a section we read in all abbreviations and install them | |
72bf9492 DJ |
5710 | in a hash table. This function also sets flags in CU describing |
5711 | the data found in the abbrev table. */ | |
c906108c SS |
5712 | |
5713 | static void | |
e7c27a73 | 5714 | dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu) |
c906108c | 5715 | { |
e7c27a73 | 5716 | struct comp_unit_head *cu_header = &cu->header; |
fe1b8b76 | 5717 | gdb_byte *abbrev_ptr; |
c906108c SS |
5718 | struct abbrev_info *cur_abbrev; |
5719 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
5720 | unsigned int abbrev_form, hash_number; | |
f3dd6933 DJ |
5721 | struct attr_abbrev *cur_attrs; |
5722 | unsigned int allocated_attrs; | |
c906108c | 5723 | |
57349743 | 5724 | /* Initialize dwarf2 abbrevs */ |
f3dd6933 DJ |
5725 | obstack_init (&cu->abbrev_obstack); |
5726 | cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack, | |
5727 | (ABBREV_HASH_SIZE | |
5728 | * sizeof (struct abbrev_info *))); | |
5729 | memset (cu->dwarf2_abbrevs, 0, | |
5730 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 5731 | |
dce234bc | 5732 | abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset; |
c906108c SS |
5733 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
5734 | abbrev_ptr += bytes_read; | |
5735 | ||
f3dd6933 DJ |
5736 | allocated_attrs = ATTR_ALLOC_CHUNK; |
5737 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
5738 | ||
c906108c SS |
5739 | /* loop until we reach an abbrev number of 0 */ |
5740 | while (abbrev_number) | |
5741 | { | |
f3dd6933 | 5742 | cur_abbrev = dwarf_alloc_abbrev (cu); |
c906108c SS |
5743 | |
5744 | /* read in abbrev header */ | |
5745 | cur_abbrev->number = abbrev_number; | |
5746 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5747 | abbrev_ptr += bytes_read; | |
5748 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
5749 | abbrev_ptr += 1; | |
5750 | ||
72bf9492 DJ |
5751 | if (cur_abbrev->tag == DW_TAG_namespace) |
5752 | cu->has_namespace_info = 1; | |
5753 | ||
c906108c SS |
5754 | /* now read in declarations */ |
5755 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5756 | abbrev_ptr += bytes_read; | |
5757 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5758 | abbrev_ptr += bytes_read; | |
5759 | while (abbrev_name) | |
5760 | { | |
f3dd6933 | 5761 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 5762 | { |
f3dd6933 DJ |
5763 | allocated_attrs += ATTR_ALLOC_CHUNK; |
5764 | cur_attrs | |
5765 | = xrealloc (cur_attrs, (allocated_attrs | |
5766 | * sizeof (struct attr_abbrev))); | |
c906108c | 5767 | } |
ae038cb0 DJ |
5768 | |
5769 | /* Record whether this compilation unit might have | |
5770 | inter-compilation-unit references. If we don't know what form | |
5771 | this attribute will have, then it might potentially be a | |
5772 | DW_FORM_ref_addr, so we conservatively expect inter-CU | |
5773 | references. */ | |
5774 | ||
5775 | if (abbrev_form == DW_FORM_ref_addr | |
5776 | || abbrev_form == DW_FORM_indirect) | |
5777 | cu->has_form_ref_addr = 1; | |
5778 | ||
f3dd6933 DJ |
5779 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
5780 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
5781 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
5782 | abbrev_ptr += bytes_read; | |
5783 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5784 | abbrev_ptr += bytes_read; | |
5785 | } | |
5786 | ||
f3dd6933 DJ |
5787 | cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack, |
5788 | (cur_abbrev->num_attrs | |
5789 | * sizeof (struct attr_abbrev))); | |
5790 | memcpy (cur_abbrev->attrs, cur_attrs, | |
5791 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
5792 | ||
c906108c | 5793 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
f3dd6933 DJ |
5794 | cur_abbrev->next = cu->dwarf2_abbrevs[hash_number]; |
5795 | cu->dwarf2_abbrevs[hash_number] = cur_abbrev; | |
c906108c SS |
5796 | |
5797 | /* Get next abbreviation. | |
5798 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
5799 | always properly terminated with an abbrev number of 0. |
5800 | Exit loop if we encounter an abbreviation which we have | |
5801 | already read (which means we are about to read the abbreviations | |
5802 | for the next compile unit) or if the end of the abbreviation | |
5803 | table is reached. */ | |
dce234bc PP |
5804 | if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer) |
5805 | >= dwarf2_per_objfile->abbrev.size) | |
c906108c SS |
5806 | break; |
5807 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5808 | abbrev_ptr += bytes_read; | |
e7c27a73 | 5809 | if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL) |
c906108c SS |
5810 | break; |
5811 | } | |
f3dd6933 DJ |
5812 | |
5813 | xfree (cur_attrs); | |
c906108c SS |
5814 | } |
5815 | ||
f3dd6933 | 5816 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 5817 | |
c906108c | 5818 | static void |
f3dd6933 | 5819 | dwarf2_free_abbrev_table (void *ptr_to_cu) |
c906108c | 5820 | { |
f3dd6933 | 5821 | struct dwarf2_cu *cu = ptr_to_cu; |
c906108c | 5822 | |
f3dd6933 DJ |
5823 | obstack_free (&cu->abbrev_obstack, NULL); |
5824 | cu->dwarf2_abbrevs = NULL; | |
c906108c SS |
5825 | } |
5826 | ||
5827 | /* Lookup an abbrev_info structure in the abbrev hash table. */ | |
5828 | ||
5829 | static struct abbrev_info * | |
e7c27a73 | 5830 | dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu) |
c906108c SS |
5831 | { |
5832 | unsigned int hash_number; | |
5833 | struct abbrev_info *abbrev; | |
5834 | ||
5835 | hash_number = number % ABBREV_HASH_SIZE; | |
f3dd6933 | 5836 | abbrev = cu->dwarf2_abbrevs[hash_number]; |
c906108c SS |
5837 | |
5838 | while (abbrev) | |
5839 | { | |
5840 | if (abbrev->number == number) | |
5841 | return abbrev; | |
5842 | else | |
5843 | abbrev = abbrev->next; | |
5844 | } | |
5845 | return NULL; | |
5846 | } | |
5847 | ||
72bf9492 DJ |
5848 | /* Returns nonzero if TAG represents a type that we might generate a partial |
5849 | symbol for. */ | |
5850 | ||
5851 | static int | |
5852 | is_type_tag_for_partial (int tag) | |
5853 | { | |
5854 | switch (tag) | |
5855 | { | |
5856 | #if 0 | |
5857 | /* Some types that would be reasonable to generate partial symbols for, | |
5858 | that we don't at present. */ | |
5859 | case DW_TAG_array_type: | |
5860 | case DW_TAG_file_type: | |
5861 | case DW_TAG_ptr_to_member_type: | |
5862 | case DW_TAG_set_type: | |
5863 | case DW_TAG_string_type: | |
5864 | case DW_TAG_subroutine_type: | |
5865 | #endif | |
5866 | case DW_TAG_base_type: | |
5867 | case DW_TAG_class_type: | |
680b30c7 | 5868 | case DW_TAG_interface_type: |
72bf9492 DJ |
5869 | case DW_TAG_enumeration_type: |
5870 | case DW_TAG_structure_type: | |
5871 | case DW_TAG_subrange_type: | |
5872 | case DW_TAG_typedef: | |
5873 | case DW_TAG_union_type: | |
5874 | return 1; | |
5875 | default: | |
5876 | return 0; | |
5877 | } | |
5878 | } | |
5879 | ||
5880 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
5881 | ||
5882 | static struct partial_die_info * | |
fe1b8b76 | 5883 | load_partial_dies (bfd *abfd, gdb_byte *info_ptr, int building_psymtab, |
72bf9492 DJ |
5884 | struct dwarf2_cu *cu) |
5885 | { | |
5886 | struct partial_die_info *part_die; | |
5887 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
5888 | struct abbrev_info *abbrev; | |
5889 | unsigned int bytes_read; | |
5afb4e99 | 5890 | unsigned int load_all = 0; |
72bf9492 DJ |
5891 | |
5892 | int nesting_level = 1; | |
5893 | ||
5894 | parent_die = NULL; | |
5895 | last_die = NULL; | |
5896 | ||
5afb4e99 DJ |
5897 | if (cu->per_cu && cu->per_cu->load_all_dies) |
5898 | load_all = 1; | |
5899 | ||
72bf9492 DJ |
5900 | cu->partial_dies |
5901 | = htab_create_alloc_ex (cu->header.length / 12, | |
5902 | partial_die_hash, | |
5903 | partial_die_eq, | |
5904 | NULL, | |
5905 | &cu->comp_unit_obstack, | |
5906 | hashtab_obstack_allocate, | |
5907 | dummy_obstack_deallocate); | |
5908 | ||
5909 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
5910 | sizeof (struct partial_die_info)); | |
5911 | ||
5912 | while (1) | |
5913 | { | |
5914 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
5915 | ||
5916 | /* A NULL abbrev means the end of a series of children. */ | |
5917 | if (abbrev == NULL) | |
5918 | { | |
5919 | if (--nesting_level == 0) | |
5920 | { | |
5921 | /* PART_DIE was probably the last thing allocated on the | |
5922 | comp_unit_obstack, so we could call obstack_free | |
5923 | here. We don't do that because the waste is small, | |
5924 | and will be cleaned up when we're done with this | |
5925 | compilation unit. This way, we're also more robust | |
5926 | against other users of the comp_unit_obstack. */ | |
5927 | return first_die; | |
5928 | } | |
5929 | info_ptr += bytes_read; | |
5930 | last_die = parent_die; | |
5931 | parent_die = parent_die->die_parent; | |
5932 | continue; | |
5933 | } | |
5934 | ||
5afb4e99 DJ |
5935 | /* Check whether this DIE is interesting enough to save. Normally |
5936 | we would not be interested in members here, but there may be | |
5937 | later variables referencing them via DW_AT_specification (for | |
5938 | static members). */ | |
5939 | if (!load_all | |
5940 | && !is_type_tag_for_partial (abbrev->tag) | |
72bf9492 DJ |
5941 | && abbrev->tag != DW_TAG_enumerator |
5942 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 5943 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 5944 | && abbrev->tag != DW_TAG_variable |
5afb4e99 DJ |
5945 | && abbrev->tag != DW_TAG_namespace |
5946 | && abbrev->tag != DW_TAG_member) | |
72bf9492 DJ |
5947 | { |
5948 | /* Otherwise we skip to the next sibling, if any. */ | |
5949 | info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu); | |
5950 | continue; | |
5951 | } | |
5952 | ||
5953 | info_ptr = read_partial_die (part_die, abbrev, bytes_read, | |
5954 | abfd, info_ptr, cu); | |
5955 | ||
5956 | /* This two-pass algorithm for processing partial symbols has a | |
5957 | high cost in cache pressure. Thus, handle some simple cases | |
5958 | here which cover the majority of C partial symbols. DIEs | |
5959 | which neither have specification tags in them, nor could have | |
5960 | specification tags elsewhere pointing at them, can simply be | |
5961 | processed and discarded. | |
5962 | ||
5963 | This segment is also optional; scan_partial_symbols and | |
5964 | add_partial_symbol will handle these DIEs if we chain | |
5965 | them in normally. When compilers which do not emit large | |
5966 | quantities of duplicate debug information are more common, | |
5967 | this code can probably be removed. */ | |
5968 | ||
5969 | /* Any complete simple types at the top level (pretty much all | |
5970 | of them, for a language without namespaces), can be processed | |
5971 | directly. */ | |
5972 | if (parent_die == NULL | |
5973 | && part_die->has_specification == 0 | |
5974 | && part_die->is_declaration == 0 | |
5975 | && (part_die->tag == DW_TAG_typedef | |
5976 | || part_die->tag == DW_TAG_base_type | |
5977 | || part_die->tag == DW_TAG_subrange_type)) | |
5978 | { | |
5979 | if (building_psymtab && part_die->name != NULL) | |
5980 | add_psymbol_to_list (part_die->name, strlen (part_die->name), | |
5981 | VAR_DOMAIN, LOC_TYPEDEF, | |
5982 | &cu->objfile->static_psymbols, | |
5983 | 0, (CORE_ADDR) 0, cu->language, cu->objfile); | |
5984 | info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu); | |
5985 | continue; | |
5986 | } | |
5987 | ||
5988 | /* If we're at the second level, and we're an enumerator, and | |
5989 | our parent has no specification (meaning possibly lives in a | |
5990 | namespace elsewhere), then we can add the partial symbol now | |
5991 | instead of queueing it. */ | |
5992 | if (part_die->tag == DW_TAG_enumerator | |
5993 | && parent_die != NULL | |
5994 | && parent_die->die_parent == NULL | |
5995 | && parent_die->tag == DW_TAG_enumeration_type | |
5996 | && parent_die->has_specification == 0) | |
5997 | { | |
5998 | if (part_die->name == NULL) | |
e2e0b3e5 | 5999 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
72bf9492 DJ |
6000 | else if (building_psymtab) |
6001 | add_psymbol_to_list (part_die->name, strlen (part_die->name), | |
6002 | VAR_DOMAIN, LOC_CONST, | |
987504bb JJ |
6003 | (cu->language == language_cplus |
6004 | || cu->language == language_java) | |
72bf9492 DJ |
6005 | ? &cu->objfile->global_psymbols |
6006 | : &cu->objfile->static_psymbols, | |
6007 | 0, (CORE_ADDR) 0, cu->language, cu->objfile); | |
6008 | ||
6009 | info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu); | |
6010 | continue; | |
6011 | } | |
6012 | ||
6013 | /* We'll save this DIE so link it in. */ | |
6014 | part_die->die_parent = parent_die; | |
6015 | part_die->die_sibling = NULL; | |
6016 | part_die->die_child = NULL; | |
6017 | ||
6018 | if (last_die && last_die == parent_die) | |
6019 | last_die->die_child = part_die; | |
6020 | else if (last_die) | |
6021 | last_die->die_sibling = part_die; | |
6022 | ||
6023 | last_die = part_die; | |
6024 | ||
6025 | if (first_die == NULL) | |
6026 | first_die = part_die; | |
6027 | ||
6028 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
6029 | find interesting need to be in the hash table, because we | |
6030 | also have the parent/sibling/child chains; only those that we | |
6031 | might refer to by offset later during partial symbol reading. | |
6032 | ||
6033 | For now this means things that might have be the target of a | |
6034 | DW_AT_specification, DW_AT_abstract_origin, or | |
6035 | DW_AT_extension. DW_AT_extension will refer only to | |
6036 | namespaces; DW_AT_abstract_origin refers to functions (and | |
6037 | many things under the function DIE, but we do not recurse | |
6038 | into function DIEs during partial symbol reading) and | |
6039 | possibly variables as well; DW_AT_specification refers to | |
6040 | declarations. Declarations ought to have the DW_AT_declaration | |
6041 | flag. It happens that GCC forgets to put it in sometimes, but | |
6042 | only for functions, not for types. | |
6043 | ||
6044 | Adding more things than necessary to the hash table is harmless | |
6045 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
6046 | wasted time in find_partial_die, when we reread the compilation |
6047 | unit with load_all_dies set. */ | |
72bf9492 | 6048 | |
5afb4e99 DJ |
6049 | if (load_all |
6050 | || abbrev->tag == DW_TAG_subprogram | |
72bf9492 DJ |
6051 | || abbrev->tag == DW_TAG_variable |
6052 | || abbrev->tag == DW_TAG_namespace | |
6053 | || part_die->is_declaration) | |
6054 | { | |
6055 | void **slot; | |
6056 | ||
6057 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
6058 | part_die->offset, INSERT); | |
6059 | *slot = part_die; | |
6060 | } | |
6061 | ||
6062 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
6063 | sizeof (struct partial_die_info)); | |
6064 | ||
6065 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 6066 | we have no reason to follow the children of structures; for other |
72bf9492 | 6067 | languages we have to, both so that we can get at method physnames |
bc30ff58 JB |
6068 | to infer fully qualified class names, and for DW_AT_specification. |
6069 | ||
6070 | For Ada, we need to scan the children of subprograms and lexical | |
6071 | blocks as well because Ada allows the definition of nested | |
6072 | entities that could be interesting for the debugger, such as | |
6073 | nested subprograms for instance. */ | |
72bf9492 | 6074 | if (last_die->has_children |
5afb4e99 DJ |
6075 | && (load_all |
6076 | || last_die->tag == DW_TAG_namespace | |
72bf9492 DJ |
6077 | || last_die->tag == DW_TAG_enumeration_type |
6078 | || (cu->language != language_c | |
6079 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 6080 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 6081 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
6082 | || last_die->tag == DW_TAG_union_type)) |
6083 | || (cu->language == language_ada | |
6084 | && (last_die->tag == DW_TAG_subprogram | |
6085 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
6086 | { |
6087 | nesting_level++; | |
6088 | parent_die = last_die; | |
6089 | continue; | |
6090 | } | |
6091 | ||
6092 | /* Otherwise we skip to the next sibling, if any. */ | |
6093 | info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu); | |
6094 | ||
6095 | /* Back to the top, do it again. */ | |
6096 | } | |
6097 | } | |
6098 | ||
c906108c SS |
6099 | /* Read a minimal amount of information into the minimal die structure. */ |
6100 | ||
fe1b8b76 | 6101 | static gdb_byte * |
72bf9492 DJ |
6102 | read_partial_die (struct partial_die_info *part_die, |
6103 | struct abbrev_info *abbrev, | |
6104 | unsigned int abbrev_len, bfd *abfd, | |
fe1b8b76 | 6105 | gdb_byte *info_ptr, struct dwarf2_cu *cu) |
c906108c | 6106 | { |
72bf9492 | 6107 | unsigned int bytes_read, i; |
c906108c | 6108 | struct attribute attr; |
c5aa993b | 6109 | int has_low_pc_attr = 0; |
c906108c | 6110 | int has_high_pc_attr = 0; |
e7030f15 | 6111 | CORE_ADDR base_address = 0; |
85cbf3d3 JK |
6112 | enum |
6113 | { | |
6114 | base_address_none, | |
6115 | base_address_low_pc, | |
6116 | /* Overrides BASE_ADDRESS_LOW_PC. */ | |
6117 | base_address_entry_pc | |
6118 | } | |
6119 | base_address_type = base_address_none; | |
c906108c | 6120 | |
72bf9492 | 6121 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 6122 | |
dce234bc | 6123 | part_die->offset = info_ptr - dwarf2_per_objfile->info.buffer; |
72bf9492 DJ |
6124 | |
6125 | info_ptr += abbrev_len; | |
6126 | ||
6127 | if (abbrev == NULL) | |
6128 | return info_ptr; | |
6129 | ||
c906108c SS |
6130 | part_die->tag = abbrev->tag; |
6131 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
6132 | |
6133 | for (i = 0; i < abbrev->num_attrs; ++i) | |
6134 | { | |
e7c27a73 | 6135 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu); |
c906108c SS |
6136 | |
6137 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 6138 | partial symbol table. */ |
c906108c SS |
6139 | switch (attr.name) |
6140 | { | |
6141 | case DW_AT_name: | |
71c25dea TT |
6142 | switch (part_die->tag) |
6143 | { | |
6144 | case DW_TAG_compile_unit: | |
6145 | /* Compilation units have a DW_AT_name that is a filename, not | |
6146 | a source language identifier. */ | |
6147 | case DW_TAG_enumeration_type: | |
6148 | case DW_TAG_enumerator: | |
6149 | /* These tags always have simple identifiers already; no need | |
6150 | to canonicalize them. */ | |
6151 | part_die->name = DW_STRING (&attr); | |
6152 | break; | |
6153 | default: | |
6154 | part_die->name | |
6155 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
6156 | &cu->comp_unit_obstack); | |
6157 | break; | |
6158 | } | |
c906108c | 6159 | break; |
57c22c6c BR |
6160 | case DW_AT_comp_dir: |
6161 | if (part_die->dirname == NULL) | |
6162 | part_die->dirname = DW_STRING (&attr); | |
6163 | break; | |
c906108c SS |
6164 | case DW_AT_MIPS_linkage_name: |
6165 | part_die->name = DW_STRING (&attr); | |
6166 | break; | |
6167 | case DW_AT_low_pc: | |
6168 | has_low_pc_attr = 1; | |
6169 | part_die->lowpc = DW_ADDR (&attr); | |
85cbf3d3 JK |
6170 | if (part_die->tag == DW_TAG_compile_unit |
6171 | && base_address_type < base_address_low_pc) | |
6172 | { | |
6173 | base_address = DW_ADDR (&attr); | |
6174 | base_address_type = base_address_low_pc; | |
6175 | } | |
c906108c SS |
6176 | break; |
6177 | case DW_AT_high_pc: | |
6178 | has_high_pc_attr = 1; | |
6179 | part_die->highpc = DW_ADDR (&attr); | |
6180 | break; | |
85cbf3d3 JK |
6181 | case DW_AT_entry_pc: |
6182 | if (part_die->tag == DW_TAG_compile_unit | |
6183 | && base_address_type < base_address_entry_pc) | |
6184 | { | |
6185 | base_address = DW_ADDR (&attr); | |
6186 | base_address_type = base_address_entry_pc; | |
6187 | } | |
6188 | break; | |
43039443 | 6189 | case DW_AT_ranges: |
ff013f42 JK |
6190 | if (part_die->tag == DW_TAG_compile_unit) |
6191 | { | |
6192 | cu->ranges_offset = DW_UNSND (&attr); | |
6193 | cu->has_ranges_offset = 1; | |
6194 | } | |
43039443 | 6195 | break; |
c906108c | 6196 | case DW_AT_location: |
8e19ed76 PS |
6197 | /* Support the .debug_loc offsets */ |
6198 | if (attr_form_is_block (&attr)) | |
6199 | { | |
6200 | part_die->locdesc = DW_BLOCK (&attr); | |
6201 | } | |
3690dd37 | 6202 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 6203 | { |
4d3c2250 | 6204 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
6205 | } |
6206 | else | |
6207 | { | |
4d3c2250 KB |
6208 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
6209 | "partial symbol information"); | |
8e19ed76 | 6210 | } |
c906108c SS |
6211 | break; |
6212 | case DW_AT_language: | |
6213 | part_die->language = DW_UNSND (&attr); | |
6214 | break; | |
6215 | case DW_AT_external: | |
6216 | part_die->is_external = DW_UNSND (&attr); | |
6217 | break; | |
6218 | case DW_AT_declaration: | |
6219 | part_die->is_declaration = DW_UNSND (&attr); | |
6220 | break; | |
6221 | case DW_AT_type: | |
6222 | part_die->has_type = 1; | |
6223 | break; | |
6224 | case DW_AT_abstract_origin: | |
6225 | case DW_AT_specification: | |
72bf9492 DJ |
6226 | case DW_AT_extension: |
6227 | part_die->has_specification = 1; | |
c764a876 | 6228 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
c906108c SS |
6229 | break; |
6230 | case DW_AT_sibling: | |
6231 | /* Ignore absolute siblings, they might point outside of | |
6232 | the current compile unit. */ | |
6233 | if (attr.form == DW_FORM_ref_addr) | |
e2e0b3e5 | 6234 | complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling")); |
c906108c | 6235 | else |
dce234bc | 6236 | part_die->sibling = dwarf2_per_objfile->info.buffer |
c764a876 | 6237 | + dwarf2_get_ref_die_offset (&attr); |
c906108c | 6238 | break; |
aaa75496 JB |
6239 | case DW_AT_stmt_list: |
6240 | part_die->has_stmt_list = 1; | |
6241 | part_die->line_offset = DW_UNSND (&attr); | |
6242 | break; | |
fa4028e9 JB |
6243 | case DW_AT_byte_size: |
6244 | part_die->has_byte_size = 1; | |
6245 | break; | |
68511cec CES |
6246 | case DW_AT_calling_convention: |
6247 | /* DWARF doesn't provide a way to identify a program's source-level | |
6248 | entry point. DW_AT_calling_convention attributes are only meant | |
6249 | to describe functions' calling conventions. | |
6250 | ||
6251 | However, because it's a necessary piece of information in | |
6252 | Fortran, and because DW_CC_program is the only piece of debugging | |
6253 | information whose definition refers to a 'main program' at all, | |
6254 | several compilers have begun marking Fortran main programs with | |
6255 | DW_CC_program --- even when those functions use the standard | |
6256 | calling conventions. | |
6257 | ||
6258 | So until DWARF specifies a way to provide this information and | |
6259 | compilers pick up the new representation, we'll support this | |
6260 | practice. */ | |
6261 | if (DW_UNSND (&attr) == DW_CC_program | |
6262 | && cu->language == language_fortran) | |
6263 | set_main_name (part_die->name); | |
6264 | break; | |
c906108c SS |
6265 | default: |
6266 | break; | |
6267 | } | |
6268 | } | |
6269 | ||
c906108c SS |
6270 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
6271 | eliminate duplicate copies of functions and vtables and such. | |
6272 | The linker will arbitrarily choose one and discard the others. | |
6273 | The AT_*_pc values for such functions refer to local labels in | |
6274 | these sections. If the section from that file was discarded, the | |
6275 | labels are not in the output, so the relocs get a value of 0. | |
6276 | If this is a discarded function, mark the pc bounds as invalid, | |
6277 | so that GDB will ignore it. */ | |
6278 | if (has_low_pc_attr && has_high_pc_attr | |
6279 | && part_die->lowpc < part_die->highpc | |
6280 | && (part_die->lowpc != 0 | |
72dca2f5 | 6281 | || dwarf2_per_objfile->has_section_at_zero)) |
0b010bcc | 6282 | part_die->has_pc_info = 1; |
85cbf3d3 | 6283 | |
d00adf39 | 6284 | if (base_address_type != base_address_none && !cu->base_known) |
85cbf3d3 JK |
6285 | { |
6286 | gdb_assert (part_die->tag == DW_TAG_compile_unit); | |
d00adf39 DE |
6287 | cu->base_known = 1; |
6288 | cu->base_address = base_address; | |
85cbf3d3 JK |
6289 | } |
6290 | ||
c906108c SS |
6291 | return info_ptr; |
6292 | } | |
6293 | ||
72bf9492 DJ |
6294 | /* Find a cached partial DIE at OFFSET in CU. */ |
6295 | ||
6296 | static struct partial_die_info * | |
c764a876 | 6297 | find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
6298 | { |
6299 | struct partial_die_info *lookup_die = NULL; | |
6300 | struct partial_die_info part_die; | |
6301 | ||
6302 | part_die.offset = offset; | |
6303 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset); | |
6304 | ||
72bf9492 DJ |
6305 | return lookup_die; |
6306 | } | |
6307 | ||
6308 | /* Find a partial DIE at OFFSET, which may or may not be in CU. */ | |
6309 | ||
6310 | static struct partial_die_info * | |
c764a876 | 6311 | find_partial_die (unsigned int offset, struct dwarf2_cu *cu) |
72bf9492 | 6312 | { |
5afb4e99 DJ |
6313 | struct dwarf2_per_cu_data *per_cu = NULL; |
6314 | struct partial_die_info *pd = NULL; | |
72bf9492 | 6315 | |
45452591 | 6316 | if (offset_in_cu_p (&cu->header, offset)) |
5afb4e99 DJ |
6317 | { |
6318 | pd = find_partial_die_in_comp_unit (offset, cu); | |
6319 | if (pd != NULL) | |
6320 | return pd; | |
6321 | } | |
72bf9492 | 6322 | |
ae038cb0 DJ |
6323 | per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile); |
6324 | ||
ae038cb0 DJ |
6325 | if (per_cu->cu == NULL) |
6326 | { | |
6327 | load_comp_unit (per_cu, cu->objfile); | |
6328 | per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6329 | dwarf2_per_objfile->read_in_chain = per_cu; | |
6330 | } | |
6331 | ||
6332 | per_cu->cu->last_used = 0; | |
5afb4e99 DJ |
6333 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); |
6334 | ||
6335 | if (pd == NULL && per_cu->load_all_dies == 0) | |
6336 | { | |
6337 | struct cleanup *back_to; | |
6338 | struct partial_die_info comp_unit_die; | |
6339 | struct abbrev_info *abbrev; | |
6340 | unsigned int bytes_read; | |
6341 | char *info_ptr; | |
6342 | ||
6343 | per_cu->load_all_dies = 1; | |
6344 | ||
6345 | /* Re-read the DIEs. */ | |
6346 | back_to = make_cleanup (null_cleanup, 0); | |
6347 | if (per_cu->cu->dwarf2_abbrevs == NULL) | |
6348 | { | |
6349 | dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu); | |
6350 | back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu); | |
6351 | } | |
dce234bc | 6352 | info_ptr = (dwarf2_per_objfile->info.buffer |
d00adf39 DE |
6353 | + per_cu->cu->header.offset |
6354 | + per_cu->cu->header.first_die_offset); | |
5afb4e99 DJ |
6355 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu); |
6356 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
6357 | per_cu->cu->objfile->obfd, info_ptr, | |
6358 | per_cu->cu); | |
6359 | if (comp_unit_die.has_children) | |
6360 | load_partial_dies (per_cu->cu->objfile->obfd, info_ptr, 0, per_cu->cu); | |
6361 | do_cleanups (back_to); | |
6362 | ||
6363 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
6364 | } | |
6365 | ||
6366 | if (pd == NULL) | |
6367 | internal_error (__FILE__, __LINE__, | |
c764a876 | 6368 | _("could not find partial DIE 0x%x in cache [from module %s]\n"), |
5afb4e99 DJ |
6369 | offset, bfd_get_filename (cu->objfile->obfd)); |
6370 | return pd; | |
72bf9492 DJ |
6371 | } |
6372 | ||
6373 | /* Adjust PART_DIE before generating a symbol for it. This function | |
6374 | may set the is_external flag or change the DIE's name. */ | |
6375 | ||
6376 | static void | |
6377 | fixup_partial_die (struct partial_die_info *part_die, | |
6378 | struct dwarf2_cu *cu) | |
6379 | { | |
6380 | /* If we found a reference attribute and the DIE has no name, try | |
6381 | to find a name in the referred to DIE. */ | |
6382 | ||
6383 | if (part_die->name == NULL && part_die->has_specification) | |
6384 | { | |
6385 | struct partial_die_info *spec_die; | |
72bf9492 | 6386 | |
10b3939b | 6387 | spec_die = find_partial_die (part_die->spec_offset, cu); |
72bf9492 | 6388 | |
10b3939b | 6389 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
6390 | |
6391 | if (spec_die->name) | |
6392 | { | |
6393 | part_die->name = spec_die->name; | |
6394 | ||
6395 | /* Copy DW_AT_external attribute if it is set. */ | |
6396 | if (spec_die->is_external) | |
6397 | part_die->is_external = spec_die->is_external; | |
6398 | } | |
6399 | } | |
6400 | ||
6401 | /* Set default names for some unnamed DIEs. */ | |
6402 | if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type | |
6403 | || part_die->tag == DW_TAG_class_type)) | |
6404 | part_die->name = "(anonymous class)"; | |
6405 | ||
6406 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
6407 | part_die->name = "(anonymous namespace)"; | |
6408 | ||
6409 | if (part_die->tag == DW_TAG_structure_type | |
6410 | || part_die->tag == DW_TAG_class_type | |
6411 | || part_die->tag == DW_TAG_union_type) | |
6412 | guess_structure_name (part_die, cu); | |
6413 | } | |
6414 | ||
639d11d3 DC |
6415 | /* Read the die from the .debug_info section buffer. Set DIEP to |
6416 | point to a newly allocated die with its information, except for its | |
6417 | child, sibling, and parent fields. Set HAS_CHILDREN to tell | |
6418 | whether the die has children or not. */ | |
c906108c | 6419 | |
fe1b8b76 JB |
6420 | static gdb_byte * |
6421 | read_full_die (struct die_info **diep, bfd *abfd, gdb_byte *info_ptr, | |
e7c27a73 | 6422 | struct dwarf2_cu *cu, int *has_children) |
c906108c SS |
6423 | { |
6424 | unsigned int abbrev_number, bytes_read, i, offset; | |
6425 | struct abbrev_info *abbrev; | |
6426 | struct die_info *die; | |
6427 | ||
dce234bc | 6428 | offset = info_ptr - dwarf2_per_objfile->info.buffer; |
c906108c SS |
6429 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6430 | info_ptr += bytes_read; | |
6431 | if (!abbrev_number) | |
6432 | { | |
1d325ec1 | 6433 | *diep = NULL; |
639d11d3 | 6434 | *has_children = 0; |
c906108c SS |
6435 | return info_ptr; |
6436 | } | |
6437 | ||
e7c27a73 | 6438 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); |
c906108c SS |
6439 | if (!abbrev) |
6440 | { | |
8a3fe4f8 | 6441 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
72bf9492 | 6442 | abbrev_number, |
639d11d3 | 6443 | bfd_get_filename (abfd)); |
c906108c | 6444 | } |
b60c80d6 | 6445 | die = dwarf_alloc_die (cu, abbrev->num_attrs); |
c906108c SS |
6446 | die->offset = offset; |
6447 | die->tag = abbrev->tag; | |
c906108c | 6448 | die->abbrev = abbrev_number; |
c906108c SS |
6449 | |
6450 | die->num_attrs = abbrev->num_attrs; | |
c906108c SS |
6451 | |
6452 | for (i = 0; i < abbrev->num_attrs; ++i) | |
03dd20cc DJ |
6453 | info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], |
6454 | abfd, info_ptr, cu); | |
c906108c SS |
6455 | |
6456 | *diep = die; | |
639d11d3 | 6457 | *has_children = abbrev->has_children; |
c906108c SS |
6458 | return info_ptr; |
6459 | } | |
6460 | ||
a8329558 | 6461 | /* Read an attribute value described by an attribute form. */ |
c906108c | 6462 | |
fe1b8b76 | 6463 | static gdb_byte * |
a8329558 | 6464 | read_attribute_value (struct attribute *attr, unsigned form, |
fe1b8b76 | 6465 | bfd *abfd, gdb_byte *info_ptr, |
e7c27a73 | 6466 | struct dwarf2_cu *cu) |
c906108c | 6467 | { |
e7c27a73 | 6468 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
6469 | unsigned int bytes_read; |
6470 | struct dwarf_block *blk; | |
6471 | ||
a8329558 KW |
6472 | attr->form = form; |
6473 | switch (form) | |
c906108c SS |
6474 | { |
6475 | case DW_FORM_addr: | |
6476 | case DW_FORM_ref_addr: | |
e7c27a73 | 6477 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 6478 | info_ptr += bytes_read; |
c906108c SS |
6479 | break; |
6480 | case DW_FORM_block2: | |
7b5a2f43 | 6481 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6482 | blk->size = read_2_bytes (abfd, info_ptr); |
6483 | info_ptr += 2; | |
6484 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6485 | info_ptr += blk->size; | |
6486 | DW_BLOCK (attr) = blk; | |
6487 | break; | |
6488 | case DW_FORM_block4: | |
7b5a2f43 | 6489 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6490 | blk->size = read_4_bytes (abfd, info_ptr); |
6491 | info_ptr += 4; | |
6492 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6493 | info_ptr += blk->size; | |
6494 | DW_BLOCK (attr) = blk; | |
6495 | break; | |
6496 | case DW_FORM_data2: | |
6497 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
6498 | info_ptr += 2; | |
6499 | break; | |
6500 | case DW_FORM_data4: | |
6501 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
6502 | info_ptr += 4; | |
6503 | break; | |
6504 | case DW_FORM_data8: | |
6505 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
6506 | info_ptr += 8; | |
6507 | break; | |
6508 | case DW_FORM_string: | |
6509 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); | |
6510 | info_ptr += bytes_read; | |
6511 | break; | |
4bdf3d34 JJ |
6512 | case DW_FORM_strp: |
6513 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
6514 | &bytes_read); | |
6515 | info_ptr += bytes_read; | |
6516 | break; | |
c906108c | 6517 | case DW_FORM_block: |
7b5a2f43 | 6518 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6519 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6520 | info_ptr += bytes_read; | |
6521 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6522 | info_ptr += blk->size; | |
6523 | DW_BLOCK (attr) = blk; | |
6524 | break; | |
6525 | case DW_FORM_block1: | |
7b5a2f43 | 6526 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6527 | blk->size = read_1_byte (abfd, info_ptr); |
6528 | info_ptr += 1; | |
6529 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6530 | info_ptr += blk->size; | |
6531 | DW_BLOCK (attr) = blk; | |
6532 | break; | |
6533 | case DW_FORM_data1: | |
6534 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
6535 | info_ptr += 1; | |
6536 | break; | |
6537 | case DW_FORM_flag: | |
6538 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
6539 | info_ptr += 1; | |
6540 | break; | |
6541 | case DW_FORM_sdata: | |
6542 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
6543 | info_ptr += bytes_read; | |
6544 | break; | |
6545 | case DW_FORM_udata: | |
6546 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6547 | info_ptr += bytes_read; | |
6548 | break; | |
6549 | case DW_FORM_ref1: | |
10b3939b | 6550 | DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr); |
c906108c SS |
6551 | info_ptr += 1; |
6552 | break; | |
6553 | case DW_FORM_ref2: | |
10b3939b | 6554 | DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr); |
c906108c SS |
6555 | info_ptr += 2; |
6556 | break; | |
6557 | case DW_FORM_ref4: | |
10b3939b | 6558 | DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr); |
c906108c SS |
6559 | info_ptr += 4; |
6560 | break; | |
613e1657 | 6561 | case DW_FORM_ref8: |
10b3939b | 6562 | DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr); |
613e1657 KB |
6563 | info_ptr += 8; |
6564 | break; | |
c906108c | 6565 | case DW_FORM_ref_udata: |
10b3939b DJ |
6566 | DW_ADDR (attr) = (cu->header.offset |
6567 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
6568 | info_ptr += bytes_read; |
6569 | break; | |
c906108c | 6570 | case DW_FORM_indirect: |
a8329558 KW |
6571 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6572 | info_ptr += bytes_read; | |
e7c27a73 | 6573 | info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu); |
a8329558 | 6574 | break; |
c906108c | 6575 | default: |
8a3fe4f8 | 6576 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
6577 | dwarf_form_name (form), |
6578 | bfd_get_filename (abfd)); | |
c906108c | 6579 | } |
28e94949 JB |
6580 | |
6581 | /* We have seen instances where the compiler tried to emit a byte | |
6582 | size attribute of -1 which ended up being encoded as an unsigned | |
6583 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
6584 | an object of this size seems pretty unlikely so we can relatively | |
6585 | safely treat these cases as if the size attribute was invalid and | |
6586 | treat them as zero by default. */ | |
6587 | if (attr->name == DW_AT_byte_size | |
6588 | && form == DW_FORM_data4 | |
6589 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
6590 | { |
6591 | complaint | |
6592 | (&symfile_complaints, | |
6593 | _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"), | |
6594 | DW_UNSND (attr)); | |
6595 | DW_UNSND (attr) = 0; | |
6596 | } | |
28e94949 | 6597 | |
c906108c SS |
6598 | return info_ptr; |
6599 | } | |
6600 | ||
a8329558 KW |
6601 | /* Read an attribute described by an abbreviated attribute. */ |
6602 | ||
fe1b8b76 | 6603 | static gdb_byte * |
a8329558 | 6604 | read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, |
fe1b8b76 | 6605 | bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu) |
a8329558 KW |
6606 | { |
6607 | attr->name = abbrev->name; | |
e7c27a73 | 6608 | return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu); |
a8329558 KW |
6609 | } |
6610 | ||
c906108c SS |
6611 | /* read dwarf information from a buffer */ |
6612 | ||
6613 | static unsigned int | |
fe1b8b76 | 6614 | read_1_byte (bfd *abfd, gdb_byte *buf) |
c906108c | 6615 | { |
fe1b8b76 | 6616 | return bfd_get_8 (abfd, buf); |
c906108c SS |
6617 | } |
6618 | ||
6619 | static int | |
fe1b8b76 | 6620 | read_1_signed_byte (bfd *abfd, gdb_byte *buf) |
c906108c | 6621 | { |
fe1b8b76 | 6622 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
6623 | } |
6624 | ||
6625 | static unsigned int | |
fe1b8b76 | 6626 | read_2_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6627 | { |
fe1b8b76 | 6628 | return bfd_get_16 (abfd, buf); |
c906108c SS |
6629 | } |
6630 | ||
6631 | static int | |
fe1b8b76 | 6632 | read_2_signed_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6633 | { |
fe1b8b76 | 6634 | return bfd_get_signed_16 (abfd, buf); |
c906108c SS |
6635 | } |
6636 | ||
6637 | static unsigned int | |
fe1b8b76 | 6638 | read_4_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6639 | { |
fe1b8b76 | 6640 | return bfd_get_32 (abfd, buf); |
c906108c SS |
6641 | } |
6642 | ||
6643 | static int | |
fe1b8b76 | 6644 | read_4_signed_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6645 | { |
fe1b8b76 | 6646 | return bfd_get_signed_32 (abfd, buf); |
c906108c SS |
6647 | } |
6648 | ||
ce5d95e1 | 6649 | static unsigned long |
fe1b8b76 | 6650 | read_8_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6651 | { |
fe1b8b76 | 6652 | return bfd_get_64 (abfd, buf); |
c906108c SS |
6653 | } |
6654 | ||
6655 | static CORE_ADDR | |
fe1b8b76 | 6656 | read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 6657 | unsigned int *bytes_read) |
c906108c | 6658 | { |
e7c27a73 | 6659 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
6660 | CORE_ADDR retval = 0; |
6661 | ||
107d2387 | 6662 | if (cu_header->signed_addr_p) |
c906108c | 6663 | { |
107d2387 AC |
6664 | switch (cu_header->addr_size) |
6665 | { | |
6666 | case 2: | |
fe1b8b76 | 6667 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
6668 | break; |
6669 | case 4: | |
fe1b8b76 | 6670 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
6671 | break; |
6672 | case 8: | |
fe1b8b76 | 6673 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
6674 | break; |
6675 | default: | |
8e65ff28 | 6676 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6677 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 6678 | bfd_get_filename (abfd)); |
107d2387 AC |
6679 | } |
6680 | } | |
6681 | else | |
6682 | { | |
6683 | switch (cu_header->addr_size) | |
6684 | { | |
6685 | case 2: | |
fe1b8b76 | 6686 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
6687 | break; |
6688 | case 4: | |
fe1b8b76 | 6689 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
6690 | break; |
6691 | case 8: | |
fe1b8b76 | 6692 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
6693 | break; |
6694 | default: | |
8e65ff28 | 6695 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6696 | _("read_address: bad switch, unsigned [in module %s]"), |
659b0389 | 6697 | bfd_get_filename (abfd)); |
107d2387 | 6698 | } |
c906108c | 6699 | } |
64367e0a | 6700 | |
107d2387 AC |
6701 | *bytes_read = cu_header->addr_size; |
6702 | return retval; | |
c906108c SS |
6703 | } |
6704 | ||
f7ef9339 | 6705 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
6706 | specification allows the initial length to take up either 4 bytes |
6707 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
6708 | bytes describe the length and all offsets will be 8 bytes in length | |
6709 | instead of 4. | |
6710 | ||
f7ef9339 KB |
6711 | An older, non-standard 64-bit format is also handled by this |
6712 | function. The older format in question stores the initial length | |
6713 | as an 8-byte quantity without an escape value. Lengths greater | |
6714 | than 2^32 aren't very common which means that the initial 4 bytes | |
6715 | is almost always zero. Since a length value of zero doesn't make | |
6716 | sense for the 32-bit format, this initial zero can be considered to | |
6717 | be an escape value which indicates the presence of the older 64-bit | |
6718 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
6719 | greater than 4GB. If it becomes necessary to handle lengths |
6720 | somewhat larger than 4GB, we could allow other small values (such | |
6721 | as the non-sensical values of 1, 2, and 3) to also be used as | |
6722 | escape values indicating the presence of the old format. | |
f7ef9339 | 6723 | |
917c78fc MK |
6724 | The value returned via bytes_read should be used to increment the |
6725 | relevant pointer after calling read_initial_length(). | |
c764a876 | 6726 | |
613e1657 KB |
6727 | [ Note: read_initial_length() and read_offset() are based on the |
6728 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 6729 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
6730 | from: |
6731 | ||
f7ef9339 | 6732 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
613e1657 KB |
6733 | |
6734 | This document is only a draft and is subject to change. (So beware.) | |
6735 | ||
f7ef9339 | 6736 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
6737 | determined empirically by examining 64-bit ELF files produced by |
6738 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
6739 | |
6740 | - Kevin, July 16, 2002 | |
613e1657 KB |
6741 | ] */ |
6742 | ||
6743 | static LONGEST | |
c764a876 | 6744 | read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 6745 | { |
fe1b8b76 | 6746 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 6747 | |
dd373385 | 6748 | if (length == 0xffffffff) |
613e1657 | 6749 | { |
fe1b8b76 | 6750 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 6751 | *bytes_read = 12; |
613e1657 | 6752 | } |
dd373385 | 6753 | else if (length == 0) |
f7ef9339 | 6754 | { |
dd373385 | 6755 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 6756 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 6757 | *bytes_read = 8; |
f7ef9339 | 6758 | } |
613e1657 KB |
6759 | else |
6760 | { | |
6761 | *bytes_read = 4; | |
613e1657 KB |
6762 | } |
6763 | ||
c764a876 DE |
6764 | return length; |
6765 | } | |
dd373385 | 6766 | |
c764a876 DE |
6767 | /* Cover function for read_initial_length. |
6768 | Returns the length of the object at BUF, and stores the size of the | |
6769 | initial length in *BYTES_READ and stores the size that offsets will be in | |
6770 | *OFFSET_SIZE. | |
6771 | If the initial length size is not equivalent to that specified in | |
6772 | CU_HEADER then issue a complaint. | |
6773 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 6774 | |
c764a876 DE |
6775 | static LONGEST |
6776 | read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf, | |
6777 | const struct comp_unit_head *cu_header, | |
6778 | unsigned int *bytes_read, | |
6779 | unsigned int *offset_size) | |
6780 | { | |
6781 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
6782 | ||
6783 | gdb_assert (cu_header->initial_length_size == 4 | |
6784 | || cu_header->initial_length_size == 8 | |
6785 | || cu_header->initial_length_size == 12); | |
6786 | ||
6787 | if (cu_header->initial_length_size != *bytes_read) | |
6788 | complaint (&symfile_complaints, | |
6789 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 6790 | |
c764a876 | 6791 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 6792 | return length; |
613e1657 KB |
6793 | } |
6794 | ||
6795 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 6796 | given by cu_header->offset_size. */ |
613e1657 KB |
6797 | |
6798 | static LONGEST | |
fe1b8b76 | 6799 | read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header, |
891d2f0b | 6800 | unsigned int *bytes_read) |
c764a876 DE |
6801 | { |
6802 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
6803 | *bytes_read = cu_header->offset_size; | |
6804 | return offset; | |
6805 | } | |
6806 | ||
6807 | /* Read an offset from the data stream. */ | |
6808 | ||
6809 | static LONGEST | |
6810 | read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size) | |
613e1657 KB |
6811 | { |
6812 | LONGEST retval = 0; | |
6813 | ||
c764a876 | 6814 | switch (offset_size) |
613e1657 KB |
6815 | { |
6816 | case 4: | |
fe1b8b76 | 6817 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
6818 | break; |
6819 | case 8: | |
fe1b8b76 | 6820 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
6821 | break; |
6822 | default: | |
8e65ff28 | 6823 | internal_error (__FILE__, __LINE__, |
c764a876 | 6824 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 6825 | bfd_get_filename (abfd)); |
613e1657 KB |
6826 | } |
6827 | ||
917c78fc | 6828 | return retval; |
613e1657 KB |
6829 | } |
6830 | ||
fe1b8b76 JB |
6831 | static gdb_byte * |
6832 | read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size) | |
c906108c SS |
6833 | { |
6834 | /* If the size of a host char is 8 bits, we can return a pointer | |
6835 | to the buffer, otherwise we have to copy the data to a buffer | |
6836 | allocated on the temporary obstack. */ | |
4bdf3d34 | 6837 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 6838 | return buf; |
c906108c SS |
6839 | } |
6840 | ||
6841 | static char * | |
fe1b8b76 | 6842 | read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c SS |
6843 | { |
6844 | /* If the size of a host char is 8 bits, we can return a pointer | |
6845 | to the string, otherwise we have to copy the string to a buffer | |
6846 | allocated on the temporary obstack. */ | |
4bdf3d34 | 6847 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
6848 | if (*buf == '\0') |
6849 | { | |
6850 | *bytes_read_ptr = 1; | |
6851 | return NULL; | |
6852 | } | |
fe1b8b76 JB |
6853 | *bytes_read_ptr = strlen ((char *) buf) + 1; |
6854 | return (char *) buf; | |
4bdf3d34 JJ |
6855 | } |
6856 | ||
6857 | static char * | |
fe1b8b76 | 6858 | read_indirect_string (bfd *abfd, gdb_byte *buf, |
4bdf3d34 JJ |
6859 | const struct comp_unit_head *cu_header, |
6860 | unsigned int *bytes_read_ptr) | |
6861 | { | |
c764a876 | 6862 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); |
c906108c | 6863 | |
dce234bc | 6864 | if (dwarf2_per_objfile->str.buffer == NULL) |
c906108c | 6865 | { |
8a3fe4f8 | 6866 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
659b0389 | 6867 | bfd_get_filename (abfd)); |
4bdf3d34 | 6868 | return NULL; |
c906108c | 6869 | } |
dce234bc | 6870 | if (str_offset >= dwarf2_per_objfile->str.size) |
c906108c | 6871 | { |
8a3fe4f8 | 6872 | error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"), |
659b0389 | 6873 | bfd_get_filename (abfd)); |
c906108c SS |
6874 | return NULL; |
6875 | } | |
4bdf3d34 | 6876 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 6877 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 6878 | return NULL; |
dce234bc | 6879 | return (char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
6880 | } |
6881 | ||
ce5d95e1 | 6882 | static unsigned long |
fe1b8b76 | 6883 | read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 6884 | { |
ce5d95e1 JB |
6885 | unsigned long result; |
6886 | unsigned int num_read; | |
c906108c SS |
6887 | int i, shift; |
6888 | unsigned char byte; | |
6889 | ||
6890 | result = 0; | |
6891 | shift = 0; | |
6892 | num_read = 0; | |
6893 | i = 0; | |
6894 | while (1) | |
6895 | { | |
fe1b8b76 | 6896 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
6897 | buf++; |
6898 | num_read++; | |
ce5d95e1 | 6899 | result |= ((unsigned long)(byte & 127) << shift); |
c906108c SS |
6900 | if ((byte & 128) == 0) |
6901 | { | |
6902 | break; | |
6903 | } | |
6904 | shift += 7; | |
6905 | } | |
6906 | *bytes_read_ptr = num_read; | |
6907 | return result; | |
6908 | } | |
6909 | ||
ce5d95e1 | 6910 | static long |
fe1b8b76 | 6911 | read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 6912 | { |
ce5d95e1 | 6913 | long result; |
77e0b926 | 6914 | int i, shift, num_read; |
c906108c SS |
6915 | unsigned char byte; |
6916 | ||
6917 | result = 0; | |
6918 | shift = 0; | |
c906108c SS |
6919 | num_read = 0; |
6920 | i = 0; | |
6921 | while (1) | |
6922 | { | |
fe1b8b76 | 6923 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
6924 | buf++; |
6925 | num_read++; | |
ce5d95e1 | 6926 | result |= ((long)(byte & 127) << shift); |
c906108c SS |
6927 | shift += 7; |
6928 | if ((byte & 128) == 0) | |
6929 | { | |
6930 | break; | |
6931 | } | |
6932 | } | |
77e0b926 DJ |
6933 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
6934 | result |= -(((long)1) << shift); | |
c906108c SS |
6935 | *bytes_read_ptr = num_read; |
6936 | return result; | |
6937 | } | |
6938 | ||
4bb7a0a7 DJ |
6939 | /* Return a pointer to just past the end of an LEB128 number in BUF. */ |
6940 | ||
fe1b8b76 JB |
6941 | static gdb_byte * |
6942 | skip_leb128 (bfd *abfd, gdb_byte *buf) | |
4bb7a0a7 DJ |
6943 | { |
6944 | int byte; | |
6945 | ||
6946 | while (1) | |
6947 | { | |
fe1b8b76 | 6948 | byte = bfd_get_8 (abfd, buf); |
4bb7a0a7 DJ |
6949 | buf++; |
6950 | if ((byte & 128) == 0) | |
6951 | return buf; | |
6952 | } | |
6953 | } | |
6954 | ||
c906108c | 6955 | static void |
e142c38c | 6956 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
6957 | { |
6958 | switch (lang) | |
6959 | { | |
6960 | case DW_LANG_C89: | |
76bee0cc | 6961 | case DW_LANG_C99: |
c906108c | 6962 | case DW_LANG_C: |
e142c38c | 6963 | cu->language = language_c; |
c906108c SS |
6964 | break; |
6965 | case DW_LANG_C_plus_plus: | |
e142c38c | 6966 | cu->language = language_cplus; |
c906108c SS |
6967 | break; |
6968 | case DW_LANG_Fortran77: | |
6969 | case DW_LANG_Fortran90: | |
b21b22e0 | 6970 | case DW_LANG_Fortran95: |
e142c38c | 6971 | cu->language = language_fortran; |
c906108c SS |
6972 | break; |
6973 | case DW_LANG_Mips_Assembler: | |
e142c38c | 6974 | cu->language = language_asm; |
c906108c | 6975 | break; |
bebd888e | 6976 | case DW_LANG_Java: |
e142c38c | 6977 | cu->language = language_java; |
bebd888e | 6978 | break; |
c906108c | 6979 | case DW_LANG_Ada83: |
8aaf0b47 | 6980 | case DW_LANG_Ada95: |
bc5f45f8 JB |
6981 | cu->language = language_ada; |
6982 | break; | |
72019c9c GM |
6983 | case DW_LANG_Modula2: |
6984 | cu->language = language_m2; | |
6985 | break; | |
fe8e67fd PM |
6986 | case DW_LANG_Pascal83: |
6987 | cu->language = language_pascal; | |
6988 | break; | |
22566fbd DJ |
6989 | case DW_LANG_ObjC: |
6990 | cu->language = language_objc; | |
6991 | break; | |
c906108c SS |
6992 | case DW_LANG_Cobol74: |
6993 | case DW_LANG_Cobol85: | |
c906108c | 6994 | default: |
e142c38c | 6995 | cu->language = language_minimal; |
c906108c SS |
6996 | break; |
6997 | } | |
e142c38c | 6998 | cu->language_defn = language_def (cu->language); |
c906108c SS |
6999 | } |
7000 | ||
7001 | /* Return the named attribute or NULL if not there. */ | |
7002 | ||
7003 | static struct attribute * | |
e142c38c | 7004 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c SS |
7005 | { |
7006 | unsigned int i; | |
7007 | struct attribute *spec = NULL; | |
7008 | ||
7009 | for (i = 0; i < die->num_attrs; ++i) | |
7010 | { | |
7011 | if (die->attrs[i].name == name) | |
10b3939b | 7012 | return &die->attrs[i]; |
c906108c SS |
7013 | if (die->attrs[i].name == DW_AT_specification |
7014 | || die->attrs[i].name == DW_AT_abstract_origin) | |
7015 | spec = &die->attrs[i]; | |
7016 | } | |
c906108c | 7017 | |
10b3939b | 7018 | if (spec) |
f2f0e013 DJ |
7019 | { |
7020 | die = follow_die_ref (die, spec, &cu); | |
7021 | return dwarf2_attr (die, name, cu); | |
7022 | } | |
c5aa993b | 7023 | |
c906108c SS |
7024 | return NULL; |
7025 | } | |
7026 | ||
05cf31d1 JB |
7027 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
7028 | and holds a non-zero value. This function should only be used for | |
7029 | DW_FORM_flag attributes. */ | |
7030 | ||
7031 | static int | |
7032 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
7033 | { | |
7034 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
7035 | ||
7036 | return (attr && DW_UNSND (attr)); | |
7037 | } | |
7038 | ||
3ca72b44 | 7039 | static int |
e142c38c | 7040 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 7041 | { |
05cf31d1 JB |
7042 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
7043 | which value is non-zero. However, we have to be careful with | |
7044 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
7045 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
7046 | end up accidently finding a declaration attribute that belongs | |
7047 | to a different DIE referenced by the specification attribute, | |
7048 | even though the given DIE does not have a declaration attribute. */ | |
7049 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
7050 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
7051 | } |
7052 | ||
63d06c5c | 7053 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 7054 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
7055 | containing the return value on output. If there is no |
7056 | specification, but there is an abstract origin, that is | |
7057 | returned. */ | |
63d06c5c DC |
7058 | |
7059 | static struct die_info * | |
f2f0e013 | 7060 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 7061 | { |
f2f0e013 DJ |
7062 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
7063 | *spec_cu); | |
63d06c5c | 7064 | |
edb3359d DJ |
7065 | if (spec_attr == NULL) |
7066 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
7067 | ||
63d06c5c DC |
7068 | if (spec_attr == NULL) |
7069 | return NULL; | |
7070 | else | |
f2f0e013 | 7071 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 7072 | } |
c906108c | 7073 | |
debd256d JB |
7074 | /* Free the line_header structure *LH, and any arrays and strings it |
7075 | refers to. */ | |
7076 | static void | |
7077 | free_line_header (struct line_header *lh) | |
7078 | { | |
7079 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 7080 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
7081 | |
7082 | /* Remember that all the lh->file_names[i].name pointers are | |
7083 | pointers into debug_line_buffer, and don't need to be freed. */ | |
7084 | if (lh->file_names) | |
a8bc7b56 | 7085 | xfree (lh->file_names); |
debd256d JB |
7086 | |
7087 | /* Similarly for the include directory names. */ | |
7088 | if (lh->include_dirs) | |
a8bc7b56 | 7089 | xfree (lh->include_dirs); |
debd256d | 7090 | |
a8bc7b56 | 7091 | xfree (lh); |
debd256d JB |
7092 | } |
7093 | ||
7094 | ||
7095 | /* Add an entry to LH's include directory table. */ | |
7096 | static void | |
7097 | add_include_dir (struct line_header *lh, char *include_dir) | |
c906108c | 7098 | { |
debd256d JB |
7099 | /* Grow the array if necessary. */ |
7100 | if (lh->include_dirs_size == 0) | |
c5aa993b | 7101 | { |
debd256d JB |
7102 | lh->include_dirs_size = 1; /* for testing */ |
7103 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
7104 | * sizeof (*lh->include_dirs)); | |
7105 | } | |
7106 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
7107 | { | |
7108 | lh->include_dirs_size *= 2; | |
7109 | lh->include_dirs = xrealloc (lh->include_dirs, | |
7110 | (lh->include_dirs_size | |
7111 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 7112 | } |
c906108c | 7113 | |
debd256d JB |
7114 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
7115 | } | |
7116 | ||
7117 | ||
7118 | /* Add an entry to LH's file name table. */ | |
7119 | static void | |
7120 | add_file_name (struct line_header *lh, | |
7121 | char *name, | |
7122 | unsigned int dir_index, | |
7123 | unsigned int mod_time, | |
7124 | unsigned int length) | |
7125 | { | |
7126 | struct file_entry *fe; | |
7127 | ||
7128 | /* Grow the array if necessary. */ | |
7129 | if (lh->file_names_size == 0) | |
7130 | { | |
7131 | lh->file_names_size = 1; /* for testing */ | |
7132 | lh->file_names = xmalloc (lh->file_names_size | |
7133 | * sizeof (*lh->file_names)); | |
7134 | } | |
7135 | else if (lh->num_file_names >= lh->file_names_size) | |
7136 | { | |
7137 | lh->file_names_size *= 2; | |
7138 | lh->file_names = xrealloc (lh->file_names, | |
7139 | (lh->file_names_size | |
7140 | * sizeof (*lh->file_names))); | |
7141 | } | |
7142 | ||
7143 | fe = &lh->file_names[lh->num_file_names++]; | |
7144 | fe->name = name; | |
7145 | fe->dir_index = dir_index; | |
7146 | fe->mod_time = mod_time; | |
7147 | fe->length = length; | |
aaa75496 | 7148 | fe->included_p = 0; |
cb1df416 | 7149 | fe->symtab = NULL; |
debd256d JB |
7150 | } |
7151 | ||
7152 | ||
7153 | /* Read the statement program header starting at OFFSET in | |
6502dd73 DJ |
7154 | .debug_line, according to the endianness of ABFD. Return a pointer |
7155 | to a struct line_header, allocated using xmalloc. | |
debd256d JB |
7156 | |
7157 | NOTE: the strings in the include directory and file name tables of | |
7158 | the returned object point into debug_line_buffer, and must not be | |
7159 | freed. */ | |
7160 | static struct line_header * | |
7161 | dwarf_decode_line_header (unsigned int offset, bfd *abfd, | |
e7c27a73 | 7162 | struct dwarf2_cu *cu) |
debd256d JB |
7163 | { |
7164 | struct cleanup *back_to; | |
7165 | struct line_header *lh; | |
fe1b8b76 | 7166 | gdb_byte *line_ptr; |
c764a876 | 7167 | unsigned int bytes_read, offset_size; |
debd256d JB |
7168 | int i; |
7169 | char *cur_dir, *cur_file; | |
7170 | ||
dce234bc | 7171 | if (dwarf2_per_objfile->line.buffer == NULL) |
debd256d | 7172 | { |
e2e0b3e5 | 7173 | complaint (&symfile_complaints, _("missing .debug_line section")); |
debd256d JB |
7174 | return 0; |
7175 | } | |
7176 | ||
a738430d MK |
7177 | /* Make sure that at least there's room for the total_length field. |
7178 | That could be 12 bytes long, but we're just going to fudge that. */ | |
dce234bc | 7179 | if (offset + 4 >= dwarf2_per_objfile->line.size) |
debd256d | 7180 | { |
4d3c2250 | 7181 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
7182 | return 0; |
7183 | } | |
7184 | ||
7185 | lh = xmalloc (sizeof (*lh)); | |
7186 | memset (lh, 0, sizeof (*lh)); | |
7187 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
7188 | (void *) lh); | |
7189 | ||
dce234bc | 7190 | line_ptr = dwarf2_per_objfile->line.buffer + offset; |
debd256d | 7191 | |
a738430d | 7192 | /* Read in the header. */ |
dd373385 | 7193 | lh->total_length = |
c764a876 DE |
7194 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
7195 | &bytes_read, &offset_size); | |
debd256d | 7196 | line_ptr += bytes_read; |
dce234bc PP |
7197 | if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer |
7198 | + dwarf2_per_objfile->line.size)) | |
debd256d | 7199 | { |
4d3c2250 | 7200 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
7201 | return 0; |
7202 | } | |
7203 | lh->statement_program_end = line_ptr + lh->total_length; | |
7204 | lh->version = read_2_bytes (abfd, line_ptr); | |
7205 | line_ptr += 2; | |
c764a876 DE |
7206 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
7207 | line_ptr += offset_size; | |
debd256d JB |
7208 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
7209 | line_ptr += 1; | |
7210 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); | |
7211 | line_ptr += 1; | |
7212 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
7213 | line_ptr += 1; | |
7214 | lh->line_range = read_1_byte (abfd, line_ptr); | |
7215 | line_ptr += 1; | |
7216 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
7217 | line_ptr += 1; | |
7218 | lh->standard_opcode_lengths | |
fe1b8b76 | 7219 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
7220 | |
7221 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
7222 | for (i = 1; i < lh->opcode_base; ++i) | |
7223 | { | |
7224 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
7225 | line_ptr += 1; | |
7226 | } | |
7227 | ||
a738430d | 7228 | /* Read directory table. */ |
debd256d JB |
7229 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
7230 | { | |
7231 | line_ptr += bytes_read; | |
7232 | add_include_dir (lh, cur_dir); | |
7233 | } | |
7234 | line_ptr += bytes_read; | |
7235 | ||
a738430d | 7236 | /* Read file name table. */ |
debd256d JB |
7237 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
7238 | { | |
7239 | unsigned int dir_index, mod_time, length; | |
7240 | ||
7241 | line_ptr += bytes_read; | |
7242 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7243 | line_ptr += bytes_read; | |
7244 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7245 | line_ptr += bytes_read; | |
7246 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7247 | line_ptr += bytes_read; | |
7248 | ||
7249 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
7250 | } | |
7251 | line_ptr += bytes_read; | |
7252 | lh->statement_program_start = line_ptr; | |
7253 | ||
dce234bc PP |
7254 | if (line_ptr > (dwarf2_per_objfile->line.buffer |
7255 | + dwarf2_per_objfile->line.size)) | |
4d3c2250 | 7256 | complaint (&symfile_complaints, |
e2e0b3e5 | 7257 | _("line number info header doesn't fit in `.debug_line' section")); |
debd256d JB |
7258 | |
7259 | discard_cleanups (back_to); | |
7260 | return lh; | |
7261 | } | |
c906108c | 7262 | |
5fb290d7 DJ |
7263 | /* This function exists to work around a bug in certain compilers |
7264 | (particularly GCC 2.95), in which the first line number marker of a | |
7265 | function does not show up until after the prologue, right before | |
7266 | the second line number marker. This function shifts ADDRESS down | |
7267 | to the beginning of the function if necessary, and is called on | |
7268 | addresses passed to record_line. */ | |
7269 | ||
7270 | static CORE_ADDR | |
e142c38c | 7271 | check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu) |
5fb290d7 DJ |
7272 | { |
7273 | struct function_range *fn; | |
7274 | ||
7275 | /* Find the function_range containing address. */ | |
e142c38c | 7276 | if (!cu->first_fn) |
5fb290d7 DJ |
7277 | return address; |
7278 | ||
e142c38c DJ |
7279 | if (!cu->cached_fn) |
7280 | cu->cached_fn = cu->first_fn; | |
5fb290d7 | 7281 | |
e142c38c | 7282 | fn = cu->cached_fn; |
5fb290d7 DJ |
7283 | while (fn) |
7284 | if (fn->lowpc <= address && fn->highpc > address) | |
7285 | goto found; | |
7286 | else | |
7287 | fn = fn->next; | |
7288 | ||
e142c38c DJ |
7289 | fn = cu->first_fn; |
7290 | while (fn && fn != cu->cached_fn) | |
5fb290d7 DJ |
7291 | if (fn->lowpc <= address && fn->highpc > address) |
7292 | goto found; | |
7293 | else | |
7294 | fn = fn->next; | |
7295 | ||
7296 | return address; | |
7297 | ||
7298 | found: | |
7299 | if (fn->seen_line) | |
7300 | return address; | |
7301 | if (address != fn->lowpc) | |
4d3c2250 | 7302 | complaint (&symfile_complaints, |
e2e0b3e5 | 7303 | _("misplaced first line number at 0x%lx for '%s'"), |
4d3c2250 | 7304 | (unsigned long) address, fn->name); |
5fb290d7 DJ |
7305 | fn->seen_line = 1; |
7306 | return fn->lowpc; | |
7307 | } | |
7308 | ||
aaa75496 JB |
7309 | /* Decode the Line Number Program (LNP) for the given line_header |
7310 | structure and CU. The actual information extracted and the type | |
7311 | of structures created from the LNP depends on the value of PST. | |
7312 | ||
7313 | 1. If PST is NULL, then this procedure uses the data from the program | |
7314 | to create all necessary symbol tables, and their linetables. | |
7315 | The compilation directory of the file is passed in COMP_DIR, | |
7316 | and must not be NULL. | |
7317 | ||
7318 | 2. If PST is not NULL, this procedure reads the program to determine | |
7319 | the list of files included by the unit represented by PST, and | |
7320 | builds all the associated partial symbol tables. In this case, | |
7321 | the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR | |
7322 | is not used to compute the full name of the symtab, and therefore | |
7323 | omitting it when building the partial symtab does not introduce | |
7324 | the potential for inconsistency - a partial symtab and its associated | |
7325 | symbtab having a different fullname -). */ | |
debd256d | 7326 | |
c906108c | 7327 | static void |
debd256d | 7328 | dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd, |
aaa75496 | 7329 | struct dwarf2_cu *cu, struct partial_symtab *pst) |
c906108c | 7330 | { |
a8c50c1f | 7331 | gdb_byte *line_ptr, *extended_end; |
fe1b8b76 | 7332 | gdb_byte *line_end; |
a8c50c1f | 7333 | unsigned int bytes_read, extended_len; |
c906108c | 7334 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
7335 | CORE_ADDR baseaddr; |
7336 | struct objfile *objfile = cu->objfile; | |
fbf65064 | 7337 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 7338 | const int decode_for_pst_p = (pst != NULL); |
cb1df416 | 7339 | struct subfile *last_subfile = NULL, *first_subfile = current_subfile; |
e142c38c DJ |
7340 | |
7341 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7342 | |
debd256d JB |
7343 | line_ptr = lh->statement_program_start; |
7344 | line_end = lh->statement_program_end; | |
c906108c SS |
7345 | |
7346 | /* Read the statement sequences until there's nothing left. */ | |
7347 | while (line_ptr < line_end) | |
7348 | { | |
7349 | /* state machine registers */ | |
7350 | CORE_ADDR address = 0; | |
7351 | unsigned int file = 1; | |
7352 | unsigned int line = 1; | |
7353 | unsigned int column = 0; | |
debd256d | 7354 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
7355 | int basic_block = 0; |
7356 | int end_sequence = 0; | |
fbf65064 | 7357 | CORE_ADDR addr; |
c906108c | 7358 | |
aaa75496 | 7359 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 7360 | { |
aaa75496 | 7361 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
7362 | /* lh->include_dirs and lh->file_names are 0-based, but the |
7363 | directory and file name numbers in the statement program | |
7364 | are 1-based. */ | |
7365 | struct file_entry *fe = &lh->file_names[file - 1]; | |
4f1520fb | 7366 | char *dir = NULL; |
a738430d | 7367 | |
debd256d JB |
7368 | if (fe->dir_index) |
7369 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
7370 | |
7371 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
7372 | } |
7373 | ||
a738430d | 7374 | /* Decode the table. */ |
c5aa993b | 7375 | while (!end_sequence) |
c906108c SS |
7376 | { |
7377 | op_code = read_1_byte (abfd, line_ptr); | |
7378 | line_ptr += 1; | |
59205f5a JB |
7379 | if (line_ptr > line_end) |
7380 | { | |
7381 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
7382 | break; | |
7383 | } | |
9aa1fe7e | 7384 | |
debd256d | 7385 | if (op_code >= lh->opcode_base) |
a738430d MK |
7386 | { |
7387 | /* Special operand. */ | |
debd256d JB |
7388 | adj_opcode = op_code - lh->opcode_base; |
7389 | address += (adj_opcode / lh->line_range) | |
7390 | * lh->minimum_instruction_length; | |
7391 | line += lh->line_base + (adj_opcode % lh->line_range); | |
59205f5a | 7392 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
7393 | dwarf2_debug_line_missing_file_complaint (); |
7394 | else | |
7395 | { | |
7396 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 7397 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
7398 | { |
7399 | if (last_subfile != current_subfile) | |
7400 | { | |
7401 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
7402 | if (last_subfile) | |
7403 | record_line (last_subfile, 0, addr); | |
7404 | last_subfile = current_subfile; | |
7405 | } | |
25e43795 | 7406 | /* Append row to matrix using current values. */ |
fbf65064 UW |
7407 | addr = check_cu_functions (address, cu); |
7408 | addr = gdbarch_addr_bits_remove (gdbarch, addr); | |
7409 | record_line (current_subfile, line, addr); | |
366da635 | 7410 | } |
25e43795 | 7411 | } |
ca5f395d | 7412 | basic_block = 0; |
9aa1fe7e GK |
7413 | } |
7414 | else switch (op_code) | |
c906108c SS |
7415 | { |
7416 | case DW_LNS_extended_op: | |
a8c50c1f | 7417 | extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
473b7be6 | 7418 | line_ptr += bytes_read; |
a8c50c1f | 7419 | extended_end = line_ptr + extended_len; |
c906108c SS |
7420 | extended_op = read_1_byte (abfd, line_ptr); |
7421 | line_ptr += 1; | |
7422 | switch (extended_op) | |
7423 | { | |
7424 | case DW_LNE_end_sequence: | |
7425 | end_sequence = 1; | |
c906108c SS |
7426 | break; |
7427 | case DW_LNE_set_address: | |
e7c27a73 | 7428 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
107d2387 AC |
7429 | line_ptr += bytes_read; |
7430 | address += baseaddr; | |
c906108c SS |
7431 | break; |
7432 | case DW_LNE_define_file: | |
debd256d JB |
7433 | { |
7434 | char *cur_file; | |
7435 | unsigned int dir_index, mod_time, length; | |
7436 | ||
7437 | cur_file = read_string (abfd, line_ptr, &bytes_read); | |
7438 | line_ptr += bytes_read; | |
7439 | dir_index = | |
7440 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7441 | line_ptr += bytes_read; | |
7442 | mod_time = | |
7443 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7444 | line_ptr += bytes_read; | |
7445 | length = | |
7446 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7447 | line_ptr += bytes_read; | |
7448 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
7449 | } | |
c906108c | 7450 | break; |
d0c6ba3d CC |
7451 | case DW_LNE_set_discriminator: |
7452 | /* The discriminator is not interesting to the debugger; | |
7453 | just ignore it. */ | |
7454 | line_ptr = extended_end; | |
7455 | break; | |
c906108c | 7456 | default: |
4d3c2250 | 7457 | complaint (&symfile_complaints, |
e2e0b3e5 | 7458 | _("mangled .debug_line section")); |
debd256d | 7459 | return; |
c906108c | 7460 | } |
a8c50c1f DJ |
7461 | /* Make sure that we parsed the extended op correctly. If e.g. |
7462 | we expected a different address size than the producer used, | |
7463 | we may have read the wrong number of bytes. */ | |
7464 | if (line_ptr != extended_end) | |
7465 | { | |
7466 | complaint (&symfile_complaints, | |
7467 | _("mangled .debug_line section")); | |
7468 | return; | |
7469 | } | |
c906108c SS |
7470 | break; |
7471 | case DW_LNS_copy: | |
59205f5a | 7472 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
7473 | dwarf2_debug_line_missing_file_complaint (); |
7474 | else | |
366da635 | 7475 | { |
25e43795 | 7476 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 7477 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
7478 | { |
7479 | if (last_subfile != current_subfile) | |
7480 | { | |
7481 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
7482 | if (last_subfile) | |
7483 | record_line (last_subfile, 0, addr); | |
7484 | last_subfile = current_subfile; | |
7485 | } | |
7486 | addr = check_cu_functions (address, cu); | |
7487 | addr = gdbarch_addr_bits_remove (gdbarch, addr); | |
7488 | record_line (current_subfile, line, addr); | |
7489 | } | |
366da635 | 7490 | } |
c906108c SS |
7491 | basic_block = 0; |
7492 | break; | |
7493 | case DW_LNS_advance_pc: | |
debd256d | 7494 | address += lh->minimum_instruction_length |
c906108c SS |
7495 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
7496 | line_ptr += bytes_read; | |
7497 | break; | |
7498 | case DW_LNS_advance_line: | |
7499 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
7500 | line_ptr += bytes_read; | |
7501 | break; | |
7502 | case DW_LNS_set_file: | |
debd256d | 7503 | { |
a738430d MK |
7504 | /* The arrays lh->include_dirs and lh->file_names are |
7505 | 0-based, but the directory and file name numbers in | |
7506 | the statement program are 1-based. */ | |
debd256d | 7507 | struct file_entry *fe; |
4f1520fb | 7508 | char *dir = NULL; |
a738430d | 7509 | |
debd256d JB |
7510 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
7511 | line_ptr += bytes_read; | |
59205f5a | 7512 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
7513 | dwarf2_debug_line_missing_file_complaint (); |
7514 | else | |
7515 | { | |
7516 | fe = &lh->file_names[file - 1]; | |
7517 | if (fe->dir_index) | |
7518 | dir = lh->include_dirs[fe->dir_index - 1]; | |
7519 | if (!decode_for_pst_p) | |
7520 | { | |
7521 | last_subfile = current_subfile; | |
7522 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
7523 | } | |
7524 | } | |
debd256d | 7525 | } |
c906108c SS |
7526 | break; |
7527 | case DW_LNS_set_column: | |
7528 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7529 | line_ptr += bytes_read; | |
7530 | break; | |
7531 | case DW_LNS_negate_stmt: | |
7532 | is_stmt = (!is_stmt); | |
7533 | break; | |
7534 | case DW_LNS_set_basic_block: | |
7535 | basic_block = 1; | |
7536 | break; | |
c2c6d25f JM |
7537 | /* Add to the address register of the state machine the |
7538 | address increment value corresponding to special opcode | |
a738430d MK |
7539 | 255. I.e., this value is scaled by the minimum |
7540 | instruction length since special opcode 255 would have | |
7541 | scaled the the increment. */ | |
c906108c | 7542 | case DW_LNS_const_add_pc: |
debd256d JB |
7543 | address += (lh->minimum_instruction_length |
7544 | * ((255 - lh->opcode_base) / lh->line_range)); | |
c906108c SS |
7545 | break; |
7546 | case DW_LNS_fixed_advance_pc: | |
7547 | address += read_2_bytes (abfd, line_ptr); | |
7548 | line_ptr += 2; | |
7549 | break; | |
9aa1fe7e | 7550 | default: |
a738430d MK |
7551 | { |
7552 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 7553 | int i; |
a738430d | 7554 | |
debd256d | 7555 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
7556 | { |
7557 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7558 | line_ptr += bytes_read; | |
7559 | } | |
7560 | } | |
c906108c SS |
7561 | } |
7562 | } | |
59205f5a JB |
7563 | if (lh->num_file_names < file || file == 0) |
7564 | dwarf2_debug_line_missing_file_complaint (); | |
7565 | else | |
7566 | { | |
7567 | lh->file_names[file - 1].included_p = 1; | |
7568 | if (!decode_for_pst_p) | |
fbf65064 UW |
7569 | { |
7570 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
7571 | record_line (current_subfile, 0, addr); | |
7572 | } | |
59205f5a | 7573 | } |
c906108c | 7574 | } |
aaa75496 JB |
7575 | |
7576 | if (decode_for_pst_p) | |
7577 | { | |
7578 | int file_index; | |
7579 | ||
7580 | /* Now that we're done scanning the Line Header Program, we can | |
7581 | create the psymtab of each included file. */ | |
7582 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
7583 | if (lh->file_names[file_index].included_p == 1) | |
7584 | { | |
5b5464ad JB |
7585 | const struct file_entry fe = lh->file_names [file_index]; |
7586 | char *include_name = fe.name; | |
7587 | char *dir_name = NULL; | |
7588 | char *pst_filename = pst->filename; | |
7589 | ||
7590 | if (fe.dir_index) | |
7591 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
7592 | ||
7593 | if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL) | |
7594 | { | |
1754f103 MK |
7595 | include_name = concat (dir_name, SLASH_STRING, |
7596 | include_name, (char *)NULL); | |
5b5464ad JB |
7597 | make_cleanup (xfree, include_name); |
7598 | } | |
7599 | ||
7600 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
7601 | { | |
1754f103 MK |
7602 | pst_filename = concat (pst->dirname, SLASH_STRING, |
7603 | pst_filename, (char *)NULL); | |
5b5464ad JB |
7604 | make_cleanup (xfree, pst_filename); |
7605 | } | |
7606 | ||
7607 | if (strcmp (include_name, pst_filename) != 0) | |
aaa75496 JB |
7608 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
7609 | } | |
7610 | } | |
cb1df416 DJ |
7611 | else |
7612 | { | |
7613 | /* Make sure a symtab is created for every file, even files | |
7614 | which contain only variables (i.e. no code with associated | |
7615 | line numbers). */ | |
7616 | ||
7617 | int i; | |
7618 | struct file_entry *fe; | |
7619 | ||
7620 | for (i = 0; i < lh->num_file_names; i++) | |
7621 | { | |
7622 | char *dir = NULL; | |
7623 | fe = &lh->file_names[i]; | |
7624 | if (fe->dir_index) | |
7625 | dir = lh->include_dirs[fe->dir_index - 1]; | |
7626 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
7627 | ||
7628 | /* Skip the main file; we don't need it, and it must be | |
7629 | allocated last, so that it will show up before the | |
7630 | non-primary symtabs in the objfile's symtab list. */ | |
7631 | if (current_subfile == first_subfile) | |
7632 | continue; | |
7633 | ||
7634 | if (current_subfile->symtab == NULL) | |
7635 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
7636 | cu->objfile); | |
7637 | fe->symtab = current_subfile->symtab; | |
7638 | } | |
7639 | } | |
c906108c SS |
7640 | } |
7641 | ||
7642 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
7643 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
7644 | or NULL if not known. COMP_DIR is the compilation directory for the |
7645 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
7646 | This routine tries to keep line numbers from identical absolute and |
7647 | relative file names in a common subfile. | |
7648 | ||
7649 | Using the `list' example from the GDB testsuite, which resides in | |
7650 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
7651 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
7652 | ||
c5aa993b JM |
7653 | DW_AT_name: /srcdir/list0.c |
7654 | DW_AT_comp_dir: /compdir | |
357e46e7 | 7655 | files.files[0].name: list0.h |
c5aa993b | 7656 | files.files[0].dir: /srcdir |
357e46e7 | 7657 | files.files[1].name: list0.c |
c5aa993b | 7658 | files.files[1].dir: /srcdir |
c906108c SS |
7659 | |
7660 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
7661 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
7662 | start_subfile will ensure that this happens provided that we pass the | |
7663 | concatenation of files.files[1].dir and files.files[1].name as the | |
7664 | subfile's name. */ | |
c906108c SS |
7665 | |
7666 | static void | |
4f1520fb | 7667 | dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir) |
c906108c | 7668 | { |
4f1520fb FR |
7669 | char *fullname; |
7670 | ||
7671 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
7672 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
7673 | second argument to start_subfile. To be consistent, we do the | |
7674 | same here. In order not to lose the line information directory, | |
7675 | we concatenate it to the filename when it makes sense. | |
7676 | Note that the Dwarf3 standard says (speaking of filenames in line | |
7677 | information): ``The directory index is ignored for file names | |
7678 | that represent full path names''. Thus ignoring dirname in the | |
7679 | `else' branch below isn't an issue. */ | |
c906108c | 7680 | |
d5166ae1 | 7681 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
4f1520fb FR |
7682 | fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL); |
7683 | else | |
7684 | fullname = filename; | |
c906108c | 7685 | |
4f1520fb FR |
7686 | start_subfile (fullname, comp_dir); |
7687 | ||
7688 | if (fullname != filename) | |
7689 | xfree (fullname); | |
c906108c SS |
7690 | } |
7691 | ||
4c2df51b DJ |
7692 | static void |
7693 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 7694 | struct dwarf2_cu *cu) |
4c2df51b | 7695 | { |
e7c27a73 DJ |
7696 | struct objfile *objfile = cu->objfile; |
7697 | struct comp_unit_head *cu_header = &cu->header; | |
7698 | ||
4c2df51b DJ |
7699 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
7700 | code here to turn a symbol with DW_AT_external and a | |
7701 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
7702 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
7703 | with some versions of binutils) where shared libraries could have | |
7704 | relocations against symbols in their debug information - the | |
7705 | minimal symbol would have the right address, but the debug info | |
7706 | would not. It's no longer necessary, because we will explicitly | |
7707 | apply relocations when we read in the debug information now. */ | |
7708 | ||
7709 | /* A DW_AT_location attribute with no contents indicates that a | |
7710 | variable has been optimized away. */ | |
7711 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
7712 | { | |
7713 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
7714 | return; | |
7715 | } | |
7716 | ||
7717 | /* Handle one degenerate form of location expression specially, to | |
7718 | preserve GDB's previous behavior when section offsets are | |
7719 | specified. If this is just a DW_OP_addr then mark this symbol | |
7720 | as LOC_STATIC. */ | |
7721 | ||
7722 | if (attr_form_is_block (attr) | |
7723 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size | |
7724 | && DW_BLOCK (attr)->data[0] == DW_OP_addr) | |
7725 | { | |
891d2f0b | 7726 | unsigned int dummy; |
4c2df51b DJ |
7727 | |
7728 | SYMBOL_VALUE_ADDRESS (sym) = | |
e7c27a73 | 7729 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); |
907fc202 | 7730 | SYMBOL_CLASS (sym) = LOC_STATIC; |
4c2df51b DJ |
7731 | fixup_symbol_section (sym, objfile); |
7732 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
7733 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
7734 | return; |
7735 | } | |
7736 | ||
7737 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
7738 | expression evaluator, and use LOC_COMPUTED only when necessary | |
7739 | (i.e. when the value of a register or memory location is | |
7740 | referenced, or a thread-local block, etc.). Then again, it might | |
7741 | not be worthwhile. I'm assuming that it isn't unless performance | |
7742 | or memory numbers show me otherwise. */ | |
7743 | ||
e7c27a73 | 7744 | dwarf2_symbol_mark_computed (attr, sym, cu); |
4c2df51b DJ |
7745 | SYMBOL_CLASS (sym) = LOC_COMPUTED; |
7746 | } | |
7747 | ||
c906108c SS |
7748 | /* Given a pointer to a DWARF information entry, figure out if we need |
7749 | to make a symbol table entry for it, and if so, create a new entry | |
7750 | and return a pointer to it. | |
7751 | If TYPE is NULL, determine symbol type from the die, otherwise | |
2df3850c | 7752 | used the passed type. */ |
c906108c SS |
7753 | |
7754 | static struct symbol * | |
e7c27a73 | 7755 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
c906108c | 7756 | { |
e7c27a73 | 7757 | struct objfile *objfile = cu->objfile; |
c906108c SS |
7758 | struct symbol *sym = NULL; |
7759 | char *name; | |
7760 | struct attribute *attr = NULL; | |
7761 | struct attribute *attr2 = NULL; | |
e142c38c | 7762 | CORE_ADDR baseaddr; |
edb3359d | 7763 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
7764 | |
7765 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7766 | |
5c4e30ca | 7767 | if (die->tag != DW_TAG_namespace) |
e142c38c | 7768 | name = dwarf2_linkage_name (die, cu); |
5c4e30ca DC |
7769 | else |
7770 | name = TYPE_NAME (type); | |
7771 | ||
c906108c SS |
7772 | if (name) |
7773 | { | |
4a146b47 | 7774 | sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
7775 | sizeof (struct symbol)); |
7776 | OBJSTAT (objfile, n_syms++); | |
7777 | memset (sym, 0, sizeof (struct symbol)); | |
2de7ced7 DJ |
7778 | |
7779 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
e142c38c | 7780 | SYMBOL_LANGUAGE (sym) = cu->language; |
2de7ced7 | 7781 | SYMBOL_SET_NAMES (sym, name, strlen (name), objfile); |
c906108c SS |
7782 | |
7783 | /* Default assumptions. | |
c5aa993b | 7784 | Use the passed type or decode it from the die. */ |
176620f1 | 7785 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
875dc2fc | 7786 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
7787 | if (type != NULL) |
7788 | SYMBOL_TYPE (sym) = type; | |
7789 | else | |
e7c27a73 | 7790 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
7791 | attr = dwarf2_attr (die, |
7792 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
7793 | cu); | |
c906108c SS |
7794 | if (attr) |
7795 | { | |
7796 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
7797 | } | |
cb1df416 | 7798 | |
edb3359d DJ |
7799 | attr = dwarf2_attr (die, |
7800 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
7801 | cu); | |
cb1df416 DJ |
7802 | if (attr) |
7803 | { | |
7804 | int file_index = DW_UNSND (attr); | |
7805 | if (cu->line_header == NULL | |
7806 | || file_index > cu->line_header->num_file_names) | |
7807 | complaint (&symfile_complaints, | |
7808 | _("file index out of range")); | |
1c3d648d | 7809 | else if (file_index > 0) |
cb1df416 DJ |
7810 | { |
7811 | struct file_entry *fe; | |
7812 | fe = &cu->line_header->file_names[file_index - 1]; | |
7813 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
7814 | } | |
7815 | } | |
7816 | ||
c906108c SS |
7817 | switch (die->tag) |
7818 | { | |
7819 | case DW_TAG_label: | |
e142c38c | 7820 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
7821 | if (attr) |
7822 | { | |
7823 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
7824 | } | |
7825 | SYMBOL_CLASS (sym) = LOC_LABEL; | |
7826 | break; | |
7827 | case DW_TAG_subprogram: | |
7828 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
7829 | finish_block. */ | |
7830 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
e142c38c | 7831 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
7832 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
7833 | || cu->language == language_ada) | |
c906108c | 7834 | { |
2cfa0c8d JB |
7835 | /* Subprograms marked external are stored as a global symbol. |
7836 | Ada subprograms, whether marked external or not, are always | |
7837 | stored as a global symbol, because we want to be able to | |
7838 | access them globally. For instance, we want to be able | |
7839 | to break on a nested subprogram without having to | |
7840 | specify the context. */ | |
c906108c SS |
7841 | add_symbol_to_list (sym, &global_symbols); |
7842 | } | |
7843 | else | |
7844 | { | |
e142c38c | 7845 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7846 | } |
7847 | break; | |
edb3359d DJ |
7848 | case DW_TAG_inlined_subroutine: |
7849 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
7850 | finish_block. */ | |
7851 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
7852 | SYMBOL_INLINED (sym) = 1; | |
7853 | /* Do not add the symbol to any lists. It will be found via | |
7854 | BLOCK_FUNCTION from the blockvector. */ | |
7855 | break; | |
c906108c SS |
7856 | case DW_TAG_variable: |
7857 | /* Compilation with minimal debug info may result in variables | |
7858 | with missing type entries. Change the misleading `void' type | |
7859 | to something sensible. */ | |
7860 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) | |
64c50499 | 7861 | SYMBOL_TYPE (sym) |
46bf5051 | 7862 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 7863 | |
e142c38c | 7864 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
7865 | if (attr) |
7866 | { | |
e7c27a73 | 7867 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 7868 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c SS |
7869 | if (attr2 && (DW_UNSND (attr2) != 0)) |
7870 | add_symbol_to_list (sym, &global_symbols); | |
7871 | else | |
e142c38c | 7872 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7873 | break; |
7874 | } | |
e142c38c | 7875 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
7876 | if (attr) |
7877 | { | |
e7c27a73 | 7878 | var_decode_location (attr, sym, cu); |
e142c38c | 7879 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c | 7880 | if (attr2 && (DW_UNSND (attr2) != 0)) |
4c2df51b | 7881 | add_symbol_to_list (sym, &global_symbols); |
c906108c | 7882 | else |
e142c38c | 7883 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7884 | } |
7885 | else | |
7886 | { | |
7887 | /* We do not know the address of this symbol. | |
c5aa993b JM |
7888 | If it is an external symbol and we have type information |
7889 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
7890 | The address of the variable will then be determined from | |
7891 | the minimal symbol table whenever the variable is | |
7892 | referenced. */ | |
e142c38c | 7893 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c | 7894 | if (attr2 && (DW_UNSND (attr2) != 0) |
e142c38c | 7895 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
c906108c SS |
7896 | { |
7897 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; | |
de40b933 | 7898 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c | 7899 | } |
442ddf59 JK |
7900 | else if (!die_is_declaration (die, cu)) |
7901 | { | |
7902 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
7903 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
7904 | add_symbol_to_list (sym, cu->list_in_scope); | |
7905 | } | |
c906108c SS |
7906 | } |
7907 | break; | |
7908 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
7909 | /* If we are inside a function, mark this as an argument. If |
7910 | not, we might be looking at an argument to an inlined function | |
7911 | when we do not have enough information to show inlined frames; | |
7912 | pretend it's a local variable in that case so that the user can | |
7913 | still see it. */ | |
7914 | if (context_stack_depth > 0 | |
7915 | && context_stack[context_stack_depth - 1].name != NULL) | |
7916 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 7917 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
7918 | if (attr) |
7919 | { | |
e7c27a73 | 7920 | var_decode_location (attr, sym, cu); |
c906108c | 7921 | } |
e142c38c | 7922 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
7923 | if (attr) |
7924 | { | |
e7c27a73 | 7925 | dwarf2_const_value (attr, sym, cu); |
c906108c | 7926 | } |
e142c38c | 7927 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7928 | break; |
7929 | case DW_TAG_unspecified_parameters: | |
7930 | /* From varargs functions; gdb doesn't seem to have any | |
7931 | interest in this information, so just ignore it for now. | |
7932 | (FIXME?) */ | |
7933 | break; | |
7934 | case DW_TAG_class_type: | |
680b30c7 | 7935 | case DW_TAG_interface_type: |
c906108c SS |
7936 | case DW_TAG_structure_type: |
7937 | case DW_TAG_union_type: | |
72019c9c | 7938 | case DW_TAG_set_type: |
c906108c SS |
7939 | case DW_TAG_enumeration_type: |
7940 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 7941 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 7942 | |
63d06c5c DC |
7943 | /* Make sure that the symbol includes appropriate enclosing |
7944 | classes/namespaces in its name. These are calculated in | |
134d01f1 | 7945 | read_structure_type, and the correct name is saved in |
63d06c5c DC |
7946 | the type. */ |
7947 | ||
987504bb JJ |
7948 | if (cu->language == language_cplus |
7949 | || cu->language == language_java) | |
c906108c | 7950 | { |
63d06c5c DC |
7951 | struct type *type = SYMBOL_TYPE (sym); |
7952 | ||
7953 | if (TYPE_TAG_NAME (type) != NULL) | |
7954 | { | |
7955 | /* FIXME: carlton/2003-11-10: Should this use | |
7956 | SYMBOL_SET_NAMES instead? (The same problem also | |
d8151005 DJ |
7957 | arises further down in this function.) */ |
7958 | /* The type's name is already allocated along with | |
7959 | this objfile, so we don't need to duplicate it | |
7960 | for the symbol. */ | |
7961 | SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type); | |
63d06c5c | 7962 | } |
c906108c | 7963 | } |
63d06c5c DC |
7964 | |
7965 | { | |
987504bb | 7966 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
7967 | really ever be static objects: otherwise, if you try |
7968 | to, say, break of a class's method and you're in a file | |
7969 | which doesn't mention that class, it won't work unless | |
7970 | the check for all static symbols in lookup_symbol_aux | |
7971 | saves you. See the OtherFileClass tests in | |
7972 | gdb.c++/namespace.exp. */ | |
7973 | ||
7974 | struct pending **list_to_add; | |
7975 | ||
e142c38c | 7976 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
7977 | && (cu->language == language_cplus |
7978 | || cu->language == language_java) | |
e142c38c | 7979 | ? &global_symbols : cu->list_in_scope); |
63d06c5c DC |
7980 | |
7981 | add_symbol_to_list (sym, list_to_add); | |
7982 | ||
7983 | /* The semantics of C++ state that "struct foo { ... }" also | |
987504bb | 7984 | defines a typedef for "foo". A Java class declaration also |
5eeb2539 | 7985 | defines a typedef for the class. */ |
987504bb | 7986 | if (cu->language == language_cplus |
8c6860bb JB |
7987 | || cu->language == language_java |
7988 | || cu->language == language_ada) | |
63d06c5c | 7989 | { |
d8151005 DJ |
7990 | /* The symbol's name is already allocated along with |
7991 | this objfile, so we don't need to duplicate it for | |
7992 | the type. */ | |
63d06c5c | 7993 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
77ef991d | 7994 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); |
63d06c5c DC |
7995 | } |
7996 | } | |
c906108c SS |
7997 | break; |
7998 | case DW_TAG_typedef: | |
0114d602 | 7999 | SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu); |
63d06c5c DC |
8000 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
8001 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; | |
e142c38c | 8002 | add_symbol_to_list (sym, cu->list_in_scope); |
63d06c5c | 8003 | break; |
c906108c | 8004 | case DW_TAG_base_type: |
a02abb62 | 8005 | case DW_TAG_subrange_type: |
c906108c | 8006 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
176620f1 | 8007 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e142c38c | 8008 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
8009 | break; |
8010 | case DW_TAG_enumerator: | |
0114d602 | 8011 | SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu); |
e142c38c | 8012 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
8013 | if (attr) |
8014 | { | |
e7c27a73 | 8015 | dwarf2_const_value (attr, sym, cu); |
c906108c | 8016 | } |
63d06c5c DC |
8017 | { |
8018 | /* NOTE: carlton/2003-11-10: See comment above in the | |
8019 | DW_TAG_class_type, etc. block. */ | |
8020 | ||
8021 | struct pending **list_to_add; | |
8022 | ||
e142c38c | 8023 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
8024 | && (cu->language == language_cplus |
8025 | || cu->language == language_java) | |
e142c38c | 8026 | ? &global_symbols : cu->list_in_scope); |
63d06c5c DC |
8027 | |
8028 | add_symbol_to_list (sym, list_to_add); | |
8029 | } | |
c906108c | 8030 | break; |
5c4e30ca DC |
8031 | case DW_TAG_namespace: |
8032 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
8033 | add_symbol_to_list (sym, &global_symbols); | |
8034 | break; | |
c906108c SS |
8035 | default: |
8036 | /* Not a tag we recognize. Hopefully we aren't processing | |
8037 | trash data, but since we must specifically ignore things | |
8038 | we don't recognize, there is nothing else we should do at | |
8039 | this point. */ | |
e2e0b3e5 | 8040 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 8041 | dwarf_tag_name (die->tag)); |
c906108c SS |
8042 | break; |
8043 | } | |
df8a16a1 DJ |
8044 | |
8045 | /* For the benefit of old versions of GCC, check for anonymous | |
8046 | namespaces based on the demangled name. */ | |
8047 | if (!processing_has_namespace_info | |
8048 | && cu->language == language_cplus | |
8049 | && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL) | |
8050 | cp_scan_for_anonymous_namespaces (sym); | |
c906108c SS |
8051 | } |
8052 | return (sym); | |
8053 | } | |
8054 | ||
8055 | /* Copy constant value from an attribute to a symbol. */ | |
8056 | ||
8057 | static void | |
107d2387 | 8058 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
e7c27a73 | 8059 | struct dwarf2_cu *cu) |
c906108c | 8060 | { |
e7c27a73 DJ |
8061 | struct objfile *objfile = cu->objfile; |
8062 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c SS |
8063 | struct dwarf_block *blk; |
8064 | ||
8065 | switch (attr->form) | |
8066 | { | |
8067 | case DW_FORM_addr: | |
107d2387 | 8068 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) |
3567439c | 8069 | dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym), |
4d3c2250 KB |
8070 | cu_header->addr_size, |
8071 | TYPE_LENGTH (SYMBOL_TYPE | |
8072 | (sym))); | |
4e38b386 | 8073 | SYMBOL_VALUE_BYTES (sym) = |
4a146b47 | 8074 | obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size); |
fbd9dcd3 AC |
8075 | /* NOTE: cagney/2003-05-09: In-lined store_address call with |
8076 | it's body - store_unsigned_integer. */ | |
8077 | store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, | |
8078 | DW_ADDR (attr)); | |
c906108c SS |
8079 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
8080 | break; | |
4ac36638 | 8081 | case DW_FORM_string: |
93b5768b PA |
8082 | case DW_FORM_strp: |
8083 | /* DW_STRING is already allocated on the obstack, point directly | |
8084 | to it. */ | |
8085 | SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr); | |
8086 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
8087 | break; | |
c906108c SS |
8088 | case DW_FORM_block1: |
8089 | case DW_FORM_block2: | |
8090 | case DW_FORM_block4: | |
8091 | case DW_FORM_block: | |
8092 | blk = DW_BLOCK (attr); | |
8093 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) | |
3567439c | 8094 | dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym), |
4d3c2250 KB |
8095 | blk->size, |
8096 | TYPE_LENGTH (SYMBOL_TYPE | |
8097 | (sym))); | |
4e38b386 | 8098 | SYMBOL_VALUE_BYTES (sym) = |
4a146b47 | 8099 | obstack_alloc (&objfile->objfile_obstack, blk->size); |
c906108c SS |
8100 | memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); |
8101 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
8102 | break; | |
2df3850c JM |
8103 | |
8104 | /* The DW_AT_const_value attributes are supposed to carry the | |
8105 | symbol's value "represented as it would be on the target | |
8106 | architecture." By the time we get here, it's already been | |
8107 | converted to host endianness, so we just need to sign- or | |
8108 | zero-extend it as appropriate. */ | |
8109 | case DW_FORM_data1: | |
8110 | dwarf2_const_value_data (attr, sym, 8); | |
8111 | break; | |
c906108c | 8112 | case DW_FORM_data2: |
2df3850c JM |
8113 | dwarf2_const_value_data (attr, sym, 16); |
8114 | break; | |
c906108c | 8115 | case DW_FORM_data4: |
2df3850c JM |
8116 | dwarf2_const_value_data (attr, sym, 32); |
8117 | break; | |
c906108c | 8118 | case DW_FORM_data8: |
2df3850c JM |
8119 | dwarf2_const_value_data (attr, sym, 64); |
8120 | break; | |
8121 | ||
c906108c | 8122 | case DW_FORM_sdata: |
2df3850c JM |
8123 | SYMBOL_VALUE (sym) = DW_SND (attr); |
8124 | SYMBOL_CLASS (sym) = LOC_CONST; | |
8125 | break; | |
8126 | ||
c906108c SS |
8127 | case DW_FORM_udata: |
8128 | SYMBOL_VALUE (sym) = DW_UNSND (attr); | |
8129 | SYMBOL_CLASS (sym) = LOC_CONST; | |
8130 | break; | |
2df3850c | 8131 | |
c906108c | 8132 | default: |
4d3c2250 | 8133 | complaint (&symfile_complaints, |
e2e0b3e5 | 8134 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 8135 | dwarf_form_name (attr->form)); |
c906108c SS |
8136 | SYMBOL_VALUE (sym) = 0; |
8137 | SYMBOL_CLASS (sym) = LOC_CONST; | |
8138 | break; | |
8139 | } | |
8140 | } | |
8141 | ||
2df3850c JM |
8142 | |
8143 | /* Given an attr with a DW_FORM_dataN value in host byte order, sign- | |
8144 | or zero-extend it as appropriate for the symbol's type. */ | |
8145 | static void | |
8146 | dwarf2_const_value_data (struct attribute *attr, | |
8147 | struct symbol *sym, | |
8148 | int bits) | |
8149 | { | |
8150 | LONGEST l = DW_UNSND (attr); | |
8151 | ||
8152 | if (bits < sizeof (l) * 8) | |
8153 | { | |
8154 | if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) | |
8155 | l &= ((LONGEST) 1 << bits) - 1; | |
8156 | else | |
bf9198f1 | 8157 | l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); |
2df3850c JM |
8158 | } |
8159 | ||
8160 | SYMBOL_VALUE (sym) = l; | |
8161 | SYMBOL_CLASS (sym) = LOC_CONST; | |
8162 | } | |
8163 | ||
8164 | ||
c906108c SS |
8165 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
8166 | ||
8167 | static struct type * | |
e7c27a73 | 8168 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
8169 | { |
8170 | struct type *type; | |
8171 | struct attribute *type_attr; | |
8172 | struct die_info *type_die; | |
c906108c | 8173 | |
e142c38c | 8174 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
8175 | if (!type_attr) |
8176 | { | |
8177 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 8178 | return objfile_type (cu->objfile)->builtin_void; |
c906108c SS |
8179 | } |
8180 | else | |
f2f0e013 | 8181 | type_die = follow_die_ref (die, type_attr, &cu); |
10b3939b | 8182 | |
e7c27a73 | 8183 | type = tag_type_to_type (type_die, cu); |
c906108c SS |
8184 | if (!type) |
8185 | { | |
d97bc12b | 8186 | dump_die_for_error (type_die); |
8a3fe4f8 | 8187 | error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"), |
e7c27a73 | 8188 | cu->objfile->name); |
c906108c SS |
8189 | } |
8190 | return type; | |
8191 | } | |
8192 | ||
8193 | /* Return the containing type of the die in question using its | |
8194 | DW_AT_containing_type attribute. */ | |
8195 | ||
8196 | static struct type * | |
e7c27a73 | 8197 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
8198 | { |
8199 | struct type *type = NULL; | |
8200 | struct attribute *type_attr; | |
8201 | struct die_info *type_die = NULL; | |
c906108c | 8202 | |
e142c38c | 8203 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
c906108c SS |
8204 | if (type_attr) |
8205 | { | |
f2f0e013 | 8206 | type_die = follow_die_ref (die, type_attr, &cu); |
e7c27a73 | 8207 | type = tag_type_to_type (type_die, cu); |
c906108c SS |
8208 | } |
8209 | if (!type) | |
8210 | { | |
8211 | if (type_die) | |
d97bc12b | 8212 | dump_die_for_error (type_die); |
8a3fe4f8 | 8213 | error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"), |
e7c27a73 | 8214 | cu->objfile->name); |
c906108c SS |
8215 | } |
8216 | return type; | |
8217 | } | |
8218 | ||
c906108c | 8219 | static struct type * |
e7c27a73 | 8220 | tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8221 | { |
f792889a DJ |
8222 | struct type *this_type; |
8223 | ||
8224 | this_type = read_type_die (die, cu); | |
8225 | if (!this_type) | |
c906108c | 8226 | { |
d97bc12b | 8227 | dump_die_for_error (die); |
f792889a DJ |
8228 | error (_("Dwarf Error: Cannot find type of die [in module %s]"), |
8229 | cu->objfile->name); | |
c906108c | 8230 | } |
f792889a | 8231 | return this_type; |
c906108c SS |
8232 | } |
8233 | ||
f792889a | 8234 | static struct type * |
e7c27a73 | 8235 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8236 | { |
f792889a DJ |
8237 | struct type *this_type; |
8238 | ||
8239 | this_type = get_die_type (die, cu); | |
8240 | if (this_type) | |
8241 | return this_type; | |
8242 | ||
c906108c SS |
8243 | switch (die->tag) |
8244 | { | |
8245 | case DW_TAG_class_type: | |
680b30c7 | 8246 | case DW_TAG_interface_type: |
c906108c SS |
8247 | case DW_TAG_structure_type: |
8248 | case DW_TAG_union_type: | |
f792889a | 8249 | this_type = read_structure_type (die, cu); |
c906108c SS |
8250 | break; |
8251 | case DW_TAG_enumeration_type: | |
f792889a | 8252 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
8253 | break; |
8254 | case DW_TAG_subprogram: | |
8255 | case DW_TAG_subroutine_type: | |
edb3359d | 8256 | case DW_TAG_inlined_subroutine: |
f792889a | 8257 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
8258 | break; |
8259 | case DW_TAG_array_type: | |
f792889a | 8260 | this_type = read_array_type (die, cu); |
c906108c | 8261 | break; |
72019c9c | 8262 | case DW_TAG_set_type: |
f792889a | 8263 | this_type = read_set_type (die, cu); |
72019c9c | 8264 | break; |
c906108c | 8265 | case DW_TAG_pointer_type: |
f792889a | 8266 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
8267 | break; |
8268 | case DW_TAG_ptr_to_member_type: | |
f792889a | 8269 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
8270 | break; |
8271 | case DW_TAG_reference_type: | |
f792889a | 8272 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
8273 | break; |
8274 | case DW_TAG_const_type: | |
f792889a | 8275 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
8276 | break; |
8277 | case DW_TAG_volatile_type: | |
f792889a | 8278 | this_type = read_tag_volatile_type (die, cu); |
c906108c SS |
8279 | break; |
8280 | case DW_TAG_string_type: | |
f792889a | 8281 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
8282 | break; |
8283 | case DW_TAG_typedef: | |
f792889a | 8284 | this_type = read_typedef (die, cu); |
c906108c | 8285 | break; |
a02abb62 | 8286 | case DW_TAG_subrange_type: |
f792889a | 8287 | this_type = read_subrange_type (die, cu); |
a02abb62 | 8288 | break; |
c906108c | 8289 | case DW_TAG_base_type: |
f792889a | 8290 | this_type = read_base_type (die, cu); |
c906108c | 8291 | break; |
81a17f79 | 8292 | case DW_TAG_unspecified_type: |
f792889a | 8293 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 8294 | break; |
0114d602 DJ |
8295 | case DW_TAG_namespace: |
8296 | this_type = read_namespace_type (die, cu); | |
8297 | break; | |
c906108c | 8298 | default: |
a1f5b845 | 8299 | complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 8300 | dwarf_tag_name (die->tag)); |
c906108c SS |
8301 | break; |
8302 | } | |
63d06c5c | 8303 | |
f792889a | 8304 | return this_type; |
63d06c5c DC |
8305 | } |
8306 | ||
fdde2d81 | 8307 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 8308 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 8309 | |
0114d602 DJ |
8310 | For example, if we're within the method foo() in the following |
8311 | code: | |
8312 | ||
8313 | namespace N { | |
8314 | class C { | |
8315 | void foo () { | |
8316 | } | |
8317 | }; | |
8318 | } | |
8319 | ||
8320 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 DC |
8321 | |
8322 | static char * | |
e142c38c | 8323 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 8324 | { |
0114d602 DJ |
8325 | struct die_info *parent, *spec_die; |
8326 | struct dwarf2_cu *spec_cu; | |
8327 | struct type *parent_type; | |
63d06c5c | 8328 | |
987504bb JJ |
8329 | if (cu->language != language_cplus |
8330 | && cu->language != language_java) | |
0114d602 DJ |
8331 | return ""; |
8332 | ||
8333 | /* We have to be careful in the presence of DW_AT_specification. | |
8334 | For example, with GCC 3.4, given the code | |
8335 | ||
8336 | namespace N { | |
8337 | void foo() { | |
8338 | // Definition of N::foo. | |
8339 | } | |
8340 | } | |
8341 | ||
8342 | then we'll have a tree of DIEs like this: | |
8343 | ||
8344 | 1: DW_TAG_compile_unit | |
8345 | 2: DW_TAG_namespace // N | |
8346 | 3: DW_TAG_subprogram // declaration of N::foo | |
8347 | 4: DW_TAG_subprogram // definition of N::foo | |
8348 | DW_AT_specification // refers to die #3 | |
8349 | ||
8350 | Thus, when processing die #4, we have to pretend that we're in | |
8351 | the context of its DW_AT_specification, namely the contex of die | |
8352 | #3. */ | |
8353 | spec_cu = cu; | |
8354 | spec_die = die_specification (die, &spec_cu); | |
8355 | if (spec_die == NULL) | |
8356 | parent = die->parent; | |
8357 | else | |
63d06c5c | 8358 | { |
0114d602 DJ |
8359 | parent = spec_die->parent; |
8360 | cu = spec_cu; | |
63d06c5c | 8361 | } |
0114d602 DJ |
8362 | |
8363 | if (parent == NULL) | |
8364 | return ""; | |
63d06c5c | 8365 | else |
0114d602 DJ |
8366 | switch (parent->tag) |
8367 | { | |
63d06c5c | 8368 | case DW_TAG_namespace: |
0114d602 DJ |
8369 | parent_type = read_type_die (parent, cu); |
8370 | /* We give a name to even anonymous namespaces. */ | |
8371 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 8372 | case DW_TAG_class_type: |
680b30c7 | 8373 | case DW_TAG_interface_type: |
63d06c5c | 8374 | case DW_TAG_structure_type: |
0114d602 DJ |
8375 | case DW_TAG_union_type: |
8376 | parent_type = read_type_die (parent, cu); | |
8377 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
8378 | return TYPE_TAG_NAME (parent_type); | |
8379 | else | |
8380 | /* An anonymous structure is only allowed non-static data | |
8381 | members; no typedefs, no member functions, et cetera. | |
8382 | So it does not need a prefix. */ | |
8383 | return ""; | |
63d06c5c | 8384 | default: |
8176b9b8 | 8385 | return determine_prefix (parent, cu); |
63d06c5c | 8386 | } |
63d06c5c DC |
8387 | } |
8388 | ||
987504bb JJ |
8389 | /* Return a newly-allocated string formed by concatenating PREFIX and |
8390 | SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
8391 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, | |
8392 | perform an obconcat, otherwise allocate storage for the result. The CU argument | |
8393 | is used to determine the language and hence, the appropriate separator. */ | |
8394 | ||
8395 | #define MAX_SEP_LEN 2 /* sizeof ("::") */ | |
63d06c5c DC |
8396 | |
8397 | static char * | |
987504bb JJ |
8398 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
8399 | struct dwarf2_cu *cu) | |
63d06c5c | 8400 | { |
987504bb | 8401 | char *sep; |
63d06c5c | 8402 | |
987504bb JJ |
8403 | if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0') |
8404 | sep = ""; | |
8405 | else if (cu->language == language_java) | |
8406 | sep = "."; | |
8407 | else | |
8408 | sep = "::"; | |
63d06c5c | 8409 | |
6dd47d34 DE |
8410 | if (prefix == NULL) |
8411 | prefix = ""; | |
8412 | if (suffix == NULL) | |
8413 | suffix = ""; | |
8414 | ||
987504bb JJ |
8415 | if (obs == NULL) |
8416 | { | |
8417 | char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
6dd47d34 DE |
8418 | strcpy (retval, prefix); |
8419 | strcat (retval, sep); | |
8420 | strcat (retval, suffix); | |
63d06c5c DC |
8421 | return retval; |
8422 | } | |
987504bb JJ |
8423 | else |
8424 | { | |
8425 | /* We have an obstack. */ | |
8426 | return obconcat (obs, prefix, sep, suffix); | |
8427 | } | |
63d06c5c DC |
8428 | } |
8429 | ||
c906108c SS |
8430 | /* Return sibling of die, NULL if no sibling. */ |
8431 | ||
f9aca02d | 8432 | static struct die_info * |
fba45db2 | 8433 | sibling_die (struct die_info *die) |
c906108c | 8434 | { |
639d11d3 | 8435 | return die->sibling; |
c906108c SS |
8436 | } |
8437 | ||
8438 | /* Get linkage name of a die, return NULL if not found. */ | |
8439 | ||
8440 | static char * | |
e142c38c | 8441 | dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
8442 | { |
8443 | struct attribute *attr; | |
8444 | ||
e142c38c | 8445 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); |
c906108c SS |
8446 | if (attr && DW_STRING (attr)) |
8447 | return DW_STRING (attr); | |
71c25dea TT |
8448 | return dwarf2_name (die, cu); |
8449 | } | |
8450 | ||
8451 | /* Get name of a die, return NULL if not found. */ | |
8452 | ||
8453 | static char * | |
8454 | dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu, | |
8455 | struct obstack *obstack) | |
8456 | { | |
8457 | if (name && cu->language == language_cplus) | |
8458 | { | |
8459 | char *canon_name = cp_canonicalize_string (name); | |
8460 | ||
8461 | if (canon_name != NULL) | |
8462 | { | |
8463 | if (strcmp (canon_name, name) != 0) | |
8464 | name = obsavestring (canon_name, strlen (canon_name), | |
8465 | obstack); | |
8466 | xfree (canon_name); | |
8467 | } | |
8468 | } | |
8469 | ||
8470 | return name; | |
c906108c SS |
8471 | } |
8472 | ||
9219021c DC |
8473 | /* Get name of a die, return NULL if not found. */ |
8474 | ||
8475 | static char * | |
e142c38c | 8476 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
8477 | { |
8478 | struct attribute *attr; | |
8479 | ||
e142c38c | 8480 | attr = dwarf2_attr (die, DW_AT_name, cu); |
71c25dea TT |
8481 | if (!attr || !DW_STRING (attr)) |
8482 | return NULL; | |
8483 | ||
8484 | switch (die->tag) | |
8485 | { | |
8486 | case DW_TAG_compile_unit: | |
8487 | /* Compilation units have a DW_AT_name that is a filename, not | |
8488 | a source language identifier. */ | |
8489 | case DW_TAG_enumeration_type: | |
8490 | case DW_TAG_enumerator: | |
8491 | /* These tags always have simple identifiers already; no need | |
8492 | to canonicalize them. */ | |
8493 | return DW_STRING (attr); | |
8494 | default: | |
8495 | if (attr->form != GDB_FORM_cached_string) | |
8496 | { | |
8497 | DW_STRING (attr) | |
8498 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
8499 | &cu->objfile->objfile_obstack); | |
8500 | attr->form = GDB_FORM_cached_string; | |
8501 | } | |
8502 | return DW_STRING (attr); | |
8503 | } | |
9219021c DC |
8504 | } |
8505 | ||
8506 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
8507 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
8508 | containing the return value on output. */ | |
9219021c DC |
8509 | |
8510 | static struct die_info * | |
f2f0e013 | 8511 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
8512 | { |
8513 | struct attribute *attr; | |
9219021c | 8514 | |
f2f0e013 | 8515 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
8516 | if (attr == NULL) |
8517 | return NULL; | |
8518 | ||
f2f0e013 | 8519 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
8520 | } |
8521 | ||
c906108c SS |
8522 | /* Convert a DIE tag into its string name. */ |
8523 | ||
8524 | static char * | |
aa1ee363 | 8525 | dwarf_tag_name (unsigned tag) |
c906108c SS |
8526 | { |
8527 | switch (tag) | |
8528 | { | |
8529 | case DW_TAG_padding: | |
8530 | return "DW_TAG_padding"; | |
8531 | case DW_TAG_array_type: | |
8532 | return "DW_TAG_array_type"; | |
8533 | case DW_TAG_class_type: | |
8534 | return "DW_TAG_class_type"; | |
8535 | case DW_TAG_entry_point: | |
8536 | return "DW_TAG_entry_point"; | |
8537 | case DW_TAG_enumeration_type: | |
8538 | return "DW_TAG_enumeration_type"; | |
8539 | case DW_TAG_formal_parameter: | |
8540 | return "DW_TAG_formal_parameter"; | |
8541 | case DW_TAG_imported_declaration: | |
8542 | return "DW_TAG_imported_declaration"; | |
8543 | case DW_TAG_label: | |
8544 | return "DW_TAG_label"; | |
8545 | case DW_TAG_lexical_block: | |
8546 | return "DW_TAG_lexical_block"; | |
8547 | case DW_TAG_member: | |
8548 | return "DW_TAG_member"; | |
8549 | case DW_TAG_pointer_type: | |
8550 | return "DW_TAG_pointer_type"; | |
8551 | case DW_TAG_reference_type: | |
8552 | return "DW_TAG_reference_type"; | |
8553 | case DW_TAG_compile_unit: | |
8554 | return "DW_TAG_compile_unit"; | |
8555 | case DW_TAG_string_type: | |
8556 | return "DW_TAG_string_type"; | |
8557 | case DW_TAG_structure_type: | |
8558 | return "DW_TAG_structure_type"; | |
8559 | case DW_TAG_subroutine_type: | |
8560 | return "DW_TAG_subroutine_type"; | |
8561 | case DW_TAG_typedef: | |
8562 | return "DW_TAG_typedef"; | |
8563 | case DW_TAG_union_type: | |
8564 | return "DW_TAG_union_type"; | |
8565 | case DW_TAG_unspecified_parameters: | |
8566 | return "DW_TAG_unspecified_parameters"; | |
8567 | case DW_TAG_variant: | |
8568 | return "DW_TAG_variant"; | |
8569 | case DW_TAG_common_block: | |
8570 | return "DW_TAG_common_block"; | |
8571 | case DW_TAG_common_inclusion: | |
8572 | return "DW_TAG_common_inclusion"; | |
8573 | case DW_TAG_inheritance: | |
8574 | return "DW_TAG_inheritance"; | |
8575 | case DW_TAG_inlined_subroutine: | |
8576 | return "DW_TAG_inlined_subroutine"; | |
8577 | case DW_TAG_module: | |
8578 | return "DW_TAG_module"; | |
8579 | case DW_TAG_ptr_to_member_type: | |
8580 | return "DW_TAG_ptr_to_member_type"; | |
8581 | case DW_TAG_set_type: | |
8582 | return "DW_TAG_set_type"; | |
8583 | case DW_TAG_subrange_type: | |
8584 | return "DW_TAG_subrange_type"; | |
8585 | case DW_TAG_with_stmt: | |
8586 | return "DW_TAG_with_stmt"; | |
8587 | case DW_TAG_access_declaration: | |
8588 | return "DW_TAG_access_declaration"; | |
8589 | case DW_TAG_base_type: | |
8590 | return "DW_TAG_base_type"; | |
8591 | case DW_TAG_catch_block: | |
8592 | return "DW_TAG_catch_block"; | |
8593 | case DW_TAG_const_type: | |
8594 | return "DW_TAG_const_type"; | |
8595 | case DW_TAG_constant: | |
8596 | return "DW_TAG_constant"; | |
8597 | case DW_TAG_enumerator: | |
8598 | return "DW_TAG_enumerator"; | |
8599 | case DW_TAG_file_type: | |
8600 | return "DW_TAG_file_type"; | |
8601 | case DW_TAG_friend: | |
8602 | return "DW_TAG_friend"; | |
8603 | case DW_TAG_namelist: | |
8604 | return "DW_TAG_namelist"; | |
8605 | case DW_TAG_namelist_item: | |
8606 | return "DW_TAG_namelist_item"; | |
8607 | case DW_TAG_packed_type: | |
8608 | return "DW_TAG_packed_type"; | |
8609 | case DW_TAG_subprogram: | |
8610 | return "DW_TAG_subprogram"; | |
8611 | case DW_TAG_template_type_param: | |
8612 | return "DW_TAG_template_type_param"; | |
8613 | case DW_TAG_template_value_param: | |
8614 | return "DW_TAG_template_value_param"; | |
8615 | case DW_TAG_thrown_type: | |
8616 | return "DW_TAG_thrown_type"; | |
8617 | case DW_TAG_try_block: | |
8618 | return "DW_TAG_try_block"; | |
8619 | case DW_TAG_variant_part: | |
8620 | return "DW_TAG_variant_part"; | |
8621 | case DW_TAG_variable: | |
8622 | return "DW_TAG_variable"; | |
8623 | case DW_TAG_volatile_type: | |
8624 | return "DW_TAG_volatile_type"; | |
d9fa45fe DC |
8625 | case DW_TAG_dwarf_procedure: |
8626 | return "DW_TAG_dwarf_procedure"; | |
8627 | case DW_TAG_restrict_type: | |
8628 | return "DW_TAG_restrict_type"; | |
8629 | case DW_TAG_interface_type: | |
8630 | return "DW_TAG_interface_type"; | |
8631 | case DW_TAG_namespace: | |
8632 | return "DW_TAG_namespace"; | |
8633 | case DW_TAG_imported_module: | |
8634 | return "DW_TAG_imported_module"; | |
8635 | case DW_TAG_unspecified_type: | |
8636 | return "DW_TAG_unspecified_type"; | |
8637 | case DW_TAG_partial_unit: | |
8638 | return "DW_TAG_partial_unit"; | |
8639 | case DW_TAG_imported_unit: | |
8640 | return "DW_TAG_imported_unit"; | |
b7619582 GF |
8641 | case DW_TAG_condition: |
8642 | return "DW_TAG_condition"; | |
8643 | case DW_TAG_shared_type: | |
8644 | return "DW_TAG_shared_type"; | |
c906108c SS |
8645 | case DW_TAG_MIPS_loop: |
8646 | return "DW_TAG_MIPS_loop"; | |
b7619582 GF |
8647 | case DW_TAG_HP_array_descriptor: |
8648 | return "DW_TAG_HP_array_descriptor"; | |
c906108c SS |
8649 | case DW_TAG_format_label: |
8650 | return "DW_TAG_format_label"; | |
8651 | case DW_TAG_function_template: | |
8652 | return "DW_TAG_function_template"; | |
8653 | case DW_TAG_class_template: | |
8654 | return "DW_TAG_class_template"; | |
b7619582 GF |
8655 | case DW_TAG_GNU_BINCL: |
8656 | return "DW_TAG_GNU_BINCL"; | |
8657 | case DW_TAG_GNU_EINCL: | |
8658 | return "DW_TAG_GNU_EINCL"; | |
8659 | case DW_TAG_upc_shared_type: | |
8660 | return "DW_TAG_upc_shared_type"; | |
8661 | case DW_TAG_upc_strict_type: | |
8662 | return "DW_TAG_upc_strict_type"; | |
8663 | case DW_TAG_upc_relaxed_type: | |
8664 | return "DW_TAG_upc_relaxed_type"; | |
8665 | case DW_TAG_PGI_kanji_type: | |
8666 | return "DW_TAG_PGI_kanji_type"; | |
8667 | case DW_TAG_PGI_interface_block: | |
8668 | return "DW_TAG_PGI_interface_block"; | |
c906108c SS |
8669 | default: |
8670 | return "DW_TAG_<unknown>"; | |
8671 | } | |
8672 | } | |
8673 | ||
8674 | /* Convert a DWARF attribute code into its string name. */ | |
8675 | ||
8676 | static char * | |
aa1ee363 | 8677 | dwarf_attr_name (unsigned attr) |
c906108c SS |
8678 | { |
8679 | switch (attr) | |
8680 | { | |
8681 | case DW_AT_sibling: | |
8682 | return "DW_AT_sibling"; | |
8683 | case DW_AT_location: | |
8684 | return "DW_AT_location"; | |
8685 | case DW_AT_name: | |
8686 | return "DW_AT_name"; | |
8687 | case DW_AT_ordering: | |
8688 | return "DW_AT_ordering"; | |
8689 | case DW_AT_subscr_data: | |
8690 | return "DW_AT_subscr_data"; | |
8691 | case DW_AT_byte_size: | |
8692 | return "DW_AT_byte_size"; | |
8693 | case DW_AT_bit_offset: | |
8694 | return "DW_AT_bit_offset"; | |
8695 | case DW_AT_bit_size: | |
8696 | return "DW_AT_bit_size"; | |
8697 | case DW_AT_element_list: | |
8698 | return "DW_AT_element_list"; | |
8699 | case DW_AT_stmt_list: | |
8700 | return "DW_AT_stmt_list"; | |
8701 | case DW_AT_low_pc: | |
8702 | return "DW_AT_low_pc"; | |
8703 | case DW_AT_high_pc: | |
8704 | return "DW_AT_high_pc"; | |
8705 | case DW_AT_language: | |
8706 | return "DW_AT_language"; | |
8707 | case DW_AT_member: | |
8708 | return "DW_AT_member"; | |
8709 | case DW_AT_discr: | |
8710 | return "DW_AT_discr"; | |
8711 | case DW_AT_discr_value: | |
8712 | return "DW_AT_discr_value"; | |
8713 | case DW_AT_visibility: | |
8714 | return "DW_AT_visibility"; | |
8715 | case DW_AT_import: | |
8716 | return "DW_AT_import"; | |
8717 | case DW_AT_string_length: | |
8718 | return "DW_AT_string_length"; | |
8719 | case DW_AT_common_reference: | |
8720 | return "DW_AT_common_reference"; | |
8721 | case DW_AT_comp_dir: | |
8722 | return "DW_AT_comp_dir"; | |
8723 | case DW_AT_const_value: | |
8724 | return "DW_AT_const_value"; | |
8725 | case DW_AT_containing_type: | |
8726 | return "DW_AT_containing_type"; | |
8727 | case DW_AT_default_value: | |
8728 | return "DW_AT_default_value"; | |
8729 | case DW_AT_inline: | |
8730 | return "DW_AT_inline"; | |
8731 | case DW_AT_is_optional: | |
8732 | return "DW_AT_is_optional"; | |
8733 | case DW_AT_lower_bound: | |
8734 | return "DW_AT_lower_bound"; | |
8735 | case DW_AT_producer: | |
8736 | return "DW_AT_producer"; | |
8737 | case DW_AT_prototyped: | |
8738 | return "DW_AT_prototyped"; | |
8739 | case DW_AT_return_addr: | |
8740 | return "DW_AT_return_addr"; | |
8741 | case DW_AT_start_scope: | |
8742 | return "DW_AT_start_scope"; | |
09fa0d7c JK |
8743 | case DW_AT_bit_stride: |
8744 | return "DW_AT_bit_stride"; | |
c906108c SS |
8745 | case DW_AT_upper_bound: |
8746 | return "DW_AT_upper_bound"; | |
8747 | case DW_AT_abstract_origin: | |
8748 | return "DW_AT_abstract_origin"; | |
8749 | case DW_AT_accessibility: | |
8750 | return "DW_AT_accessibility"; | |
8751 | case DW_AT_address_class: | |
8752 | return "DW_AT_address_class"; | |
8753 | case DW_AT_artificial: | |
8754 | return "DW_AT_artificial"; | |
8755 | case DW_AT_base_types: | |
8756 | return "DW_AT_base_types"; | |
8757 | case DW_AT_calling_convention: | |
8758 | return "DW_AT_calling_convention"; | |
8759 | case DW_AT_count: | |
8760 | return "DW_AT_count"; | |
8761 | case DW_AT_data_member_location: | |
8762 | return "DW_AT_data_member_location"; | |
8763 | case DW_AT_decl_column: | |
8764 | return "DW_AT_decl_column"; | |
8765 | case DW_AT_decl_file: | |
8766 | return "DW_AT_decl_file"; | |
8767 | case DW_AT_decl_line: | |
8768 | return "DW_AT_decl_line"; | |
8769 | case DW_AT_declaration: | |
8770 | return "DW_AT_declaration"; | |
8771 | case DW_AT_discr_list: | |
8772 | return "DW_AT_discr_list"; | |
8773 | case DW_AT_encoding: | |
8774 | return "DW_AT_encoding"; | |
8775 | case DW_AT_external: | |
8776 | return "DW_AT_external"; | |
8777 | case DW_AT_frame_base: | |
8778 | return "DW_AT_frame_base"; | |
8779 | case DW_AT_friend: | |
8780 | return "DW_AT_friend"; | |
8781 | case DW_AT_identifier_case: | |
8782 | return "DW_AT_identifier_case"; | |
8783 | case DW_AT_macro_info: | |
8784 | return "DW_AT_macro_info"; | |
8785 | case DW_AT_namelist_items: | |
8786 | return "DW_AT_namelist_items"; | |
8787 | case DW_AT_priority: | |
8788 | return "DW_AT_priority"; | |
8789 | case DW_AT_segment: | |
8790 | return "DW_AT_segment"; | |
8791 | case DW_AT_specification: | |
8792 | return "DW_AT_specification"; | |
8793 | case DW_AT_static_link: | |
8794 | return "DW_AT_static_link"; | |
8795 | case DW_AT_type: | |
8796 | return "DW_AT_type"; | |
8797 | case DW_AT_use_location: | |
8798 | return "DW_AT_use_location"; | |
8799 | case DW_AT_variable_parameter: | |
8800 | return "DW_AT_variable_parameter"; | |
8801 | case DW_AT_virtuality: | |
8802 | return "DW_AT_virtuality"; | |
8803 | case DW_AT_vtable_elem_location: | |
8804 | return "DW_AT_vtable_elem_location"; | |
b7619582 | 8805 | /* DWARF 3 values. */ |
d9fa45fe DC |
8806 | case DW_AT_allocated: |
8807 | return "DW_AT_allocated"; | |
8808 | case DW_AT_associated: | |
8809 | return "DW_AT_associated"; | |
8810 | case DW_AT_data_location: | |
8811 | return "DW_AT_data_location"; | |
09fa0d7c JK |
8812 | case DW_AT_byte_stride: |
8813 | return "DW_AT_byte_stride"; | |
d9fa45fe DC |
8814 | case DW_AT_entry_pc: |
8815 | return "DW_AT_entry_pc"; | |
8816 | case DW_AT_use_UTF8: | |
8817 | return "DW_AT_use_UTF8"; | |
8818 | case DW_AT_extension: | |
8819 | return "DW_AT_extension"; | |
8820 | case DW_AT_ranges: | |
8821 | return "DW_AT_ranges"; | |
8822 | case DW_AT_trampoline: | |
8823 | return "DW_AT_trampoline"; | |
8824 | case DW_AT_call_column: | |
8825 | return "DW_AT_call_column"; | |
8826 | case DW_AT_call_file: | |
8827 | return "DW_AT_call_file"; | |
8828 | case DW_AT_call_line: | |
8829 | return "DW_AT_call_line"; | |
b7619582 GF |
8830 | case DW_AT_description: |
8831 | return "DW_AT_description"; | |
8832 | case DW_AT_binary_scale: | |
8833 | return "DW_AT_binary_scale"; | |
8834 | case DW_AT_decimal_scale: | |
8835 | return "DW_AT_decimal_scale"; | |
8836 | case DW_AT_small: | |
8837 | return "DW_AT_small"; | |
8838 | case DW_AT_decimal_sign: | |
8839 | return "DW_AT_decimal_sign"; | |
8840 | case DW_AT_digit_count: | |
8841 | return "DW_AT_digit_count"; | |
8842 | case DW_AT_picture_string: | |
8843 | return "DW_AT_picture_string"; | |
8844 | case DW_AT_mutable: | |
8845 | return "DW_AT_mutable"; | |
8846 | case DW_AT_threads_scaled: | |
8847 | return "DW_AT_threads_scaled"; | |
8848 | case DW_AT_explicit: | |
8849 | return "DW_AT_explicit"; | |
8850 | case DW_AT_object_pointer: | |
8851 | return "DW_AT_object_pointer"; | |
8852 | case DW_AT_endianity: | |
8853 | return "DW_AT_endianity"; | |
8854 | case DW_AT_elemental: | |
8855 | return "DW_AT_elemental"; | |
8856 | case DW_AT_pure: | |
8857 | return "DW_AT_pure"; | |
8858 | case DW_AT_recursive: | |
8859 | return "DW_AT_recursive"; | |
b7619582 | 8860 | /* SGI/MIPS extensions. */ |
c764a876 | 8861 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
c906108c SS |
8862 | case DW_AT_MIPS_fde: |
8863 | return "DW_AT_MIPS_fde"; | |
c764a876 | 8864 | #endif |
c906108c SS |
8865 | case DW_AT_MIPS_loop_begin: |
8866 | return "DW_AT_MIPS_loop_begin"; | |
8867 | case DW_AT_MIPS_tail_loop_begin: | |
8868 | return "DW_AT_MIPS_tail_loop_begin"; | |
8869 | case DW_AT_MIPS_epilog_begin: | |
8870 | return "DW_AT_MIPS_epilog_begin"; | |
8871 | case DW_AT_MIPS_loop_unroll_factor: | |
8872 | return "DW_AT_MIPS_loop_unroll_factor"; | |
8873 | case DW_AT_MIPS_software_pipeline_depth: | |
8874 | return "DW_AT_MIPS_software_pipeline_depth"; | |
8875 | case DW_AT_MIPS_linkage_name: | |
8876 | return "DW_AT_MIPS_linkage_name"; | |
b7619582 GF |
8877 | case DW_AT_MIPS_stride: |
8878 | return "DW_AT_MIPS_stride"; | |
8879 | case DW_AT_MIPS_abstract_name: | |
8880 | return "DW_AT_MIPS_abstract_name"; | |
8881 | case DW_AT_MIPS_clone_origin: | |
8882 | return "DW_AT_MIPS_clone_origin"; | |
8883 | case DW_AT_MIPS_has_inlines: | |
8884 | return "DW_AT_MIPS_has_inlines"; | |
b7619582 | 8885 | /* HP extensions. */ |
c764a876 | 8886 | #ifndef MIPS /* collides with DW_AT_MIPS_fde */ |
b7619582 GF |
8887 | case DW_AT_HP_block_index: |
8888 | return "DW_AT_HP_block_index"; | |
c764a876 | 8889 | #endif |
b7619582 GF |
8890 | case DW_AT_HP_unmodifiable: |
8891 | return "DW_AT_HP_unmodifiable"; | |
8892 | case DW_AT_HP_actuals_stmt_list: | |
8893 | return "DW_AT_HP_actuals_stmt_list"; | |
8894 | case DW_AT_HP_proc_per_section: | |
8895 | return "DW_AT_HP_proc_per_section"; | |
8896 | case DW_AT_HP_raw_data_ptr: | |
8897 | return "DW_AT_HP_raw_data_ptr"; | |
8898 | case DW_AT_HP_pass_by_reference: | |
8899 | return "DW_AT_HP_pass_by_reference"; | |
8900 | case DW_AT_HP_opt_level: | |
8901 | return "DW_AT_HP_opt_level"; | |
8902 | case DW_AT_HP_prof_version_id: | |
8903 | return "DW_AT_HP_prof_version_id"; | |
8904 | case DW_AT_HP_opt_flags: | |
8905 | return "DW_AT_HP_opt_flags"; | |
8906 | case DW_AT_HP_cold_region_low_pc: | |
8907 | return "DW_AT_HP_cold_region_low_pc"; | |
8908 | case DW_AT_HP_cold_region_high_pc: | |
8909 | return "DW_AT_HP_cold_region_high_pc"; | |
8910 | case DW_AT_HP_all_variables_modifiable: | |
8911 | return "DW_AT_HP_all_variables_modifiable"; | |
8912 | case DW_AT_HP_linkage_name: | |
8913 | return "DW_AT_HP_linkage_name"; | |
8914 | case DW_AT_HP_prof_flags: | |
8915 | return "DW_AT_HP_prof_flags"; | |
8916 | /* GNU extensions. */ | |
c906108c SS |
8917 | case DW_AT_sf_names: |
8918 | return "DW_AT_sf_names"; | |
8919 | case DW_AT_src_info: | |
8920 | return "DW_AT_src_info"; | |
8921 | case DW_AT_mac_info: | |
8922 | return "DW_AT_mac_info"; | |
8923 | case DW_AT_src_coords: | |
8924 | return "DW_AT_src_coords"; | |
8925 | case DW_AT_body_begin: | |
8926 | return "DW_AT_body_begin"; | |
8927 | case DW_AT_body_end: | |
8928 | return "DW_AT_body_end"; | |
f5f8a009 EZ |
8929 | case DW_AT_GNU_vector: |
8930 | return "DW_AT_GNU_vector"; | |
b7619582 GF |
8931 | /* VMS extensions. */ |
8932 | case DW_AT_VMS_rtnbeg_pd_address: | |
8933 | return "DW_AT_VMS_rtnbeg_pd_address"; | |
8934 | /* UPC extension. */ | |
8935 | case DW_AT_upc_threads_scaled: | |
8936 | return "DW_AT_upc_threads_scaled"; | |
8937 | /* PGI (STMicroelectronics) extensions. */ | |
8938 | case DW_AT_PGI_lbase: | |
8939 | return "DW_AT_PGI_lbase"; | |
8940 | case DW_AT_PGI_soffset: | |
8941 | return "DW_AT_PGI_soffset"; | |
8942 | case DW_AT_PGI_lstride: | |
8943 | return "DW_AT_PGI_lstride"; | |
c906108c SS |
8944 | default: |
8945 | return "DW_AT_<unknown>"; | |
8946 | } | |
8947 | } | |
8948 | ||
8949 | /* Convert a DWARF value form code into its string name. */ | |
8950 | ||
8951 | static char * | |
aa1ee363 | 8952 | dwarf_form_name (unsigned form) |
c906108c SS |
8953 | { |
8954 | switch (form) | |
8955 | { | |
8956 | case DW_FORM_addr: | |
8957 | return "DW_FORM_addr"; | |
8958 | case DW_FORM_block2: | |
8959 | return "DW_FORM_block2"; | |
8960 | case DW_FORM_block4: | |
8961 | return "DW_FORM_block4"; | |
8962 | case DW_FORM_data2: | |
8963 | return "DW_FORM_data2"; | |
8964 | case DW_FORM_data4: | |
8965 | return "DW_FORM_data4"; | |
8966 | case DW_FORM_data8: | |
8967 | return "DW_FORM_data8"; | |
8968 | case DW_FORM_string: | |
8969 | return "DW_FORM_string"; | |
8970 | case DW_FORM_block: | |
8971 | return "DW_FORM_block"; | |
8972 | case DW_FORM_block1: | |
8973 | return "DW_FORM_block1"; | |
8974 | case DW_FORM_data1: | |
8975 | return "DW_FORM_data1"; | |
8976 | case DW_FORM_flag: | |
8977 | return "DW_FORM_flag"; | |
8978 | case DW_FORM_sdata: | |
8979 | return "DW_FORM_sdata"; | |
8980 | case DW_FORM_strp: | |
8981 | return "DW_FORM_strp"; | |
8982 | case DW_FORM_udata: | |
8983 | return "DW_FORM_udata"; | |
8984 | case DW_FORM_ref_addr: | |
8985 | return "DW_FORM_ref_addr"; | |
8986 | case DW_FORM_ref1: | |
8987 | return "DW_FORM_ref1"; | |
8988 | case DW_FORM_ref2: | |
8989 | return "DW_FORM_ref2"; | |
8990 | case DW_FORM_ref4: | |
8991 | return "DW_FORM_ref4"; | |
8992 | case DW_FORM_ref8: | |
8993 | return "DW_FORM_ref8"; | |
8994 | case DW_FORM_ref_udata: | |
8995 | return "DW_FORM_ref_udata"; | |
8996 | case DW_FORM_indirect: | |
8997 | return "DW_FORM_indirect"; | |
71c25dea TT |
8998 | case GDB_FORM_cached_string: |
8999 | return "GDB_FORM_cached_string"; | |
c906108c SS |
9000 | default: |
9001 | return "DW_FORM_<unknown>"; | |
9002 | } | |
9003 | } | |
9004 | ||
9005 | /* Convert a DWARF stack opcode into its string name. */ | |
9006 | ||
9007 | static char * | |
aa1ee363 | 9008 | dwarf_stack_op_name (unsigned op) |
c906108c SS |
9009 | { |
9010 | switch (op) | |
9011 | { | |
9012 | case DW_OP_addr: | |
9013 | return "DW_OP_addr"; | |
9014 | case DW_OP_deref: | |
9015 | return "DW_OP_deref"; | |
9016 | case DW_OP_const1u: | |
9017 | return "DW_OP_const1u"; | |
9018 | case DW_OP_const1s: | |
9019 | return "DW_OP_const1s"; | |
9020 | case DW_OP_const2u: | |
9021 | return "DW_OP_const2u"; | |
9022 | case DW_OP_const2s: | |
9023 | return "DW_OP_const2s"; | |
9024 | case DW_OP_const4u: | |
9025 | return "DW_OP_const4u"; | |
9026 | case DW_OP_const4s: | |
9027 | return "DW_OP_const4s"; | |
9028 | case DW_OP_const8u: | |
9029 | return "DW_OP_const8u"; | |
9030 | case DW_OP_const8s: | |
9031 | return "DW_OP_const8s"; | |
9032 | case DW_OP_constu: | |
9033 | return "DW_OP_constu"; | |
9034 | case DW_OP_consts: | |
9035 | return "DW_OP_consts"; | |
9036 | case DW_OP_dup: | |
9037 | return "DW_OP_dup"; | |
9038 | case DW_OP_drop: | |
9039 | return "DW_OP_drop"; | |
9040 | case DW_OP_over: | |
9041 | return "DW_OP_over"; | |
9042 | case DW_OP_pick: | |
9043 | return "DW_OP_pick"; | |
9044 | case DW_OP_swap: | |
9045 | return "DW_OP_swap"; | |
9046 | case DW_OP_rot: | |
9047 | return "DW_OP_rot"; | |
9048 | case DW_OP_xderef: | |
9049 | return "DW_OP_xderef"; | |
9050 | case DW_OP_abs: | |
9051 | return "DW_OP_abs"; | |
9052 | case DW_OP_and: | |
9053 | return "DW_OP_and"; | |
9054 | case DW_OP_div: | |
9055 | return "DW_OP_div"; | |
9056 | case DW_OP_minus: | |
9057 | return "DW_OP_minus"; | |
9058 | case DW_OP_mod: | |
9059 | return "DW_OP_mod"; | |
9060 | case DW_OP_mul: | |
9061 | return "DW_OP_mul"; | |
9062 | case DW_OP_neg: | |
9063 | return "DW_OP_neg"; | |
9064 | case DW_OP_not: | |
9065 | return "DW_OP_not"; | |
9066 | case DW_OP_or: | |
9067 | return "DW_OP_or"; | |
9068 | case DW_OP_plus: | |
9069 | return "DW_OP_plus"; | |
9070 | case DW_OP_plus_uconst: | |
9071 | return "DW_OP_plus_uconst"; | |
9072 | case DW_OP_shl: | |
9073 | return "DW_OP_shl"; | |
9074 | case DW_OP_shr: | |
9075 | return "DW_OP_shr"; | |
9076 | case DW_OP_shra: | |
9077 | return "DW_OP_shra"; | |
9078 | case DW_OP_xor: | |
9079 | return "DW_OP_xor"; | |
9080 | case DW_OP_bra: | |
9081 | return "DW_OP_bra"; | |
9082 | case DW_OP_eq: | |
9083 | return "DW_OP_eq"; | |
9084 | case DW_OP_ge: | |
9085 | return "DW_OP_ge"; | |
9086 | case DW_OP_gt: | |
9087 | return "DW_OP_gt"; | |
9088 | case DW_OP_le: | |
9089 | return "DW_OP_le"; | |
9090 | case DW_OP_lt: | |
9091 | return "DW_OP_lt"; | |
9092 | case DW_OP_ne: | |
9093 | return "DW_OP_ne"; | |
9094 | case DW_OP_skip: | |
9095 | return "DW_OP_skip"; | |
9096 | case DW_OP_lit0: | |
9097 | return "DW_OP_lit0"; | |
9098 | case DW_OP_lit1: | |
9099 | return "DW_OP_lit1"; | |
9100 | case DW_OP_lit2: | |
9101 | return "DW_OP_lit2"; | |
9102 | case DW_OP_lit3: | |
9103 | return "DW_OP_lit3"; | |
9104 | case DW_OP_lit4: | |
9105 | return "DW_OP_lit4"; | |
9106 | case DW_OP_lit5: | |
9107 | return "DW_OP_lit5"; | |
9108 | case DW_OP_lit6: | |
9109 | return "DW_OP_lit6"; | |
9110 | case DW_OP_lit7: | |
9111 | return "DW_OP_lit7"; | |
9112 | case DW_OP_lit8: | |
9113 | return "DW_OP_lit8"; | |
9114 | case DW_OP_lit9: | |
9115 | return "DW_OP_lit9"; | |
9116 | case DW_OP_lit10: | |
9117 | return "DW_OP_lit10"; | |
9118 | case DW_OP_lit11: | |
9119 | return "DW_OP_lit11"; | |
9120 | case DW_OP_lit12: | |
9121 | return "DW_OP_lit12"; | |
9122 | case DW_OP_lit13: | |
9123 | return "DW_OP_lit13"; | |
9124 | case DW_OP_lit14: | |
9125 | return "DW_OP_lit14"; | |
9126 | case DW_OP_lit15: | |
9127 | return "DW_OP_lit15"; | |
9128 | case DW_OP_lit16: | |
9129 | return "DW_OP_lit16"; | |
9130 | case DW_OP_lit17: | |
9131 | return "DW_OP_lit17"; | |
9132 | case DW_OP_lit18: | |
9133 | return "DW_OP_lit18"; | |
9134 | case DW_OP_lit19: | |
9135 | return "DW_OP_lit19"; | |
9136 | case DW_OP_lit20: | |
9137 | return "DW_OP_lit20"; | |
9138 | case DW_OP_lit21: | |
9139 | return "DW_OP_lit21"; | |
9140 | case DW_OP_lit22: | |
9141 | return "DW_OP_lit22"; | |
9142 | case DW_OP_lit23: | |
9143 | return "DW_OP_lit23"; | |
9144 | case DW_OP_lit24: | |
9145 | return "DW_OP_lit24"; | |
9146 | case DW_OP_lit25: | |
9147 | return "DW_OP_lit25"; | |
9148 | case DW_OP_lit26: | |
9149 | return "DW_OP_lit26"; | |
9150 | case DW_OP_lit27: | |
9151 | return "DW_OP_lit27"; | |
9152 | case DW_OP_lit28: | |
9153 | return "DW_OP_lit28"; | |
9154 | case DW_OP_lit29: | |
9155 | return "DW_OP_lit29"; | |
9156 | case DW_OP_lit30: | |
9157 | return "DW_OP_lit30"; | |
9158 | case DW_OP_lit31: | |
9159 | return "DW_OP_lit31"; | |
9160 | case DW_OP_reg0: | |
9161 | return "DW_OP_reg0"; | |
9162 | case DW_OP_reg1: | |
9163 | return "DW_OP_reg1"; | |
9164 | case DW_OP_reg2: | |
9165 | return "DW_OP_reg2"; | |
9166 | case DW_OP_reg3: | |
9167 | return "DW_OP_reg3"; | |
9168 | case DW_OP_reg4: | |
9169 | return "DW_OP_reg4"; | |
9170 | case DW_OP_reg5: | |
9171 | return "DW_OP_reg5"; | |
9172 | case DW_OP_reg6: | |
9173 | return "DW_OP_reg6"; | |
9174 | case DW_OP_reg7: | |
9175 | return "DW_OP_reg7"; | |
9176 | case DW_OP_reg8: | |
9177 | return "DW_OP_reg8"; | |
9178 | case DW_OP_reg9: | |
9179 | return "DW_OP_reg9"; | |
9180 | case DW_OP_reg10: | |
9181 | return "DW_OP_reg10"; | |
9182 | case DW_OP_reg11: | |
9183 | return "DW_OP_reg11"; | |
9184 | case DW_OP_reg12: | |
9185 | return "DW_OP_reg12"; | |
9186 | case DW_OP_reg13: | |
9187 | return "DW_OP_reg13"; | |
9188 | case DW_OP_reg14: | |
9189 | return "DW_OP_reg14"; | |
9190 | case DW_OP_reg15: | |
9191 | return "DW_OP_reg15"; | |
9192 | case DW_OP_reg16: | |
9193 | return "DW_OP_reg16"; | |
9194 | case DW_OP_reg17: | |
9195 | return "DW_OP_reg17"; | |
9196 | case DW_OP_reg18: | |
9197 | return "DW_OP_reg18"; | |
9198 | case DW_OP_reg19: | |
9199 | return "DW_OP_reg19"; | |
9200 | case DW_OP_reg20: | |
9201 | return "DW_OP_reg20"; | |
9202 | case DW_OP_reg21: | |
9203 | return "DW_OP_reg21"; | |
9204 | case DW_OP_reg22: | |
9205 | return "DW_OP_reg22"; | |
9206 | case DW_OP_reg23: | |
9207 | return "DW_OP_reg23"; | |
9208 | case DW_OP_reg24: | |
9209 | return "DW_OP_reg24"; | |
9210 | case DW_OP_reg25: | |
9211 | return "DW_OP_reg25"; | |
9212 | case DW_OP_reg26: | |
9213 | return "DW_OP_reg26"; | |
9214 | case DW_OP_reg27: | |
9215 | return "DW_OP_reg27"; | |
9216 | case DW_OP_reg28: | |
9217 | return "DW_OP_reg28"; | |
9218 | case DW_OP_reg29: | |
9219 | return "DW_OP_reg29"; | |
9220 | case DW_OP_reg30: | |
9221 | return "DW_OP_reg30"; | |
9222 | case DW_OP_reg31: | |
9223 | return "DW_OP_reg31"; | |
9224 | case DW_OP_breg0: | |
9225 | return "DW_OP_breg0"; | |
9226 | case DW_OP_breg1: | |
9227 | return "DW_OP_breg1"; | |
9228 | case DW_OP_breg2: | |
9229 | return "DW_OP_breg2"; | |
9230 | case DW_OP_breg3: | |
9231 | return "DW_OP_breg3"; | |
9232 | case DW_OP_breg4: | |
9233 | return "DW_OP_breg4"; | |
9234 | case DW_OP_breg5: | |
9235 | return "DW_OP_breg5"; | |
9236 | case DW_OP_breg6: | |
9237 | return "DW_OP_breg6"; | |
9238 | case DW_OP_breg7: | |
9239 | return "DW_OP_breg7"; | |
9240 | case DW_OP_breg8: | |
9241 | return "DW_OP_breg8"; | |
9242 | case DW_OP_breg9: | |
9243 | return "DW_OP_breg9"; | |
9244 | case DW_OP_breg10: | |
9245 | return "DW_OP_breg10"; | |
9246 | case DW_OP_breg11: | |
9247 | return "DW_OP_breg11"; | |
9248 | case DW_OP_breg12: | |
9249 | return "DW_OP_breg12"; | |
9250 | case DW_OP_breg13: | |
9251 | return "DW_OP_breg13"; | |
9252 | case DW_OP_breg14: | |
9253 | return "DW_OP_breg14"; | |
9254 | case DW_OP_breg15: | |
9255 | return "DW_OP_breg15"; | |
9256 | case DW_OP_breg16: | |
9257 | return "DW_OP_breg16"; | |
9258 | case DW_OP_breg17: | |
9259 | return "DW_OP_breg17"; | |
9260 | case DW_OP_breg18: | |
9261 | return "DW_OP_breg18"; | |
9262 | case DW_OP_breg19: | |
9263 | return "DW_OP_breg19"; | |
9264 | case DW_OP_breg20: | |
9265 | return "DW_OP_breg20"; | |
9266 | case DW_OP_breg21: | |
9267 | return "DW_OP_breg21"; | |
9268 | case DW_OP_breg22: | |
9269 | return "DW_OP_breg22"; | |
9270 | case DW_OP_breg23: | |
9271 | return "DW_OP_breg23"; | |
9272 | case DW_OP_breg24: | |
9273 | return "DW_OP_breg24"; | |
9274 | case DW_OP_breg25: | |
9275 | return "DW_OP_breg25"; | |
9276 | case DW_OP_breg26: | |
9277 | return "DW_OP_breg26"; | |
9278 | case DW_OP_breg27: | |
9279 | return "DW_OP_breg27"; | |
9280 | case DW_OP_breg28: | |
9281 | return "DW_OP_breg28"; | |
9282 | case DW_OP_breg29: | |
9283 | return "DW_OP_breg29"; | |
9284 | case DW_OP_breg30: | |
9285 | return "DW_OP_breg30"; | |
9286 | case DW_OP_breg31: | |
9287 | return "DW_OP_breg31"; | |
9288 | case DW_OP_regx: | |
9289 | return "DW_OP_regx"; | |
9290 | case DW_OP_fbreg: | |
9291 | return "DW_OP_fbreg"; | |
9292 | case DW_OP_bregx: | |
9293 | return "DW_OP_bregx"; | |
9294 | case DW_OP_piece: | |
9295 | return "DW_OP_piece"; | |
9296 | case DW_OP_deref_size: | |
9297 | return "DW_OP_deref_size"; | |
9298 | case DW_OP_xderef_size: | |
9299 | return "DW_OP_xderef_size"; | |
9300 | case DW_OP_nop: | |
9301 | return "DW_OP_nop"; | |
b7619582 | 9302 | /* DWARF 3 extensions. */ |
ed348acc EZ |
9303 | case DW_OP_push_object_address: |
9304 | return "DW_OP_push_object_address"; | |
9305 | case DW_OP_call2: | |
9306 | return "DW_OP_call2"; | |
9307 | case DW_OP_call4: | |
9308 | return "DW_OP_call4"; | |
9309 | case DW_OP_call_ref: | |
9310 | return "DW_OP_call_ref"; | |
b7619582 GF |
9311 | /* GNU extensions. */ |
9312 | case DW_OP_form_tls_address: | |
9313 | return "DW_OP_form_tls_address"; | |
9314 | case DW_OP_call_frame_cfa: | |
9315 | return "DW_OP_call_frame_cfa"; | |
9316 | case DW_OP_bit_piece: | |
9317 | return "DW_OP_bit_piece"; | |
ed348acc EZ |
9318 | case DW_OP_GNU_push_tls_address: |
9319 | return "DW_OP_GNU_push_tls_address"; | |
42be36b3 CT |
9320 | case DW_OP_GNU_uninit: |
9321 | return "DW_OP_GNU_uninit"; | |
b7619582 GF |
9322 | /* HP extensions. */ |
9323 | case DW_OP_HP_is_value: | |
9324 | return "DW_OP_HP_is_value"; | |
9325 | case DW_OP_HP_fltconst4: | |
9326 | return "DW_OP_HP_fltconst4"; | |
9327 | case DW_OP_HP_fltconst8: | |
9328 | return "DW_OP_HP_fltconst8"; | |
9329 | case DW_OP_HP_mod_range: | |
9330 | return "DW_OP_HP_mod_range"; | |
9331 | case DW_OP_HP_unmod_range: | |
9332 | return "DW_OP_HP_unmod_range"; | |
9333 | case DW_OP_HP_tls: | |
9334 | return "DW_OP_HP_tls"; | |
c906108c SS |
9335 | default: |
9336 | return "OP_<unknown>"; | |
9337 | } | |
9338 | } | |
9339 | ||
9340 | static char * | |
fba45db2 | 9341 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
9342 | { |
9343 | if (mybool) | |
9344 | return "TRUE"; | |
9345 | else | |
9346 | return "FALSE"; | |
9347 | } | |
9348 | ||
9349 | /* Convert a DWARF type code into its string name. */ | |
9350 | ||
9351 | static char * | |
aa1ee363 | 9352 | dwarf_type_encoding_name (unsigned enc) |
c906108c SS |
9353 | { |
9354 | switch (enc) | |
9355 | { | |
b7619582 GF |
9356 | case DW_ATE_void: |
9357 | return "DW_ATE_void"; | |
c906108c SS |
9358 | case DW_ATE_address: |
9359 | return "DW_ATE_address"; | |
9360 | case DW_ATE_boolean: | |
9361 | return "DW_ATE_boolean"; | |
9362 | case DW_ATE_complex_float: | |
9363 | return "DW_ATE_complex_float"; | |
9364 | case DW_ATE_float: | |
9365 | return "DW_ATE_float"; | |
9366 | case DW_ATE_signed: | |
9367 | return "DW_ATE_signed"; | |
9368 | case DW_ATE_signed_char: | |
9369 | return "DW_ATE_signed_char"; | |
9370 | case DW_ATE_unsigned: | |
9371 | return "DW_ATE_unsigned"; | |
9372 | case DW_ATE_unsigned_char: | |
9373 | return "DW_ATE_unsigned_char"; | |
b7619582 | 9374 | /* DWARF 3. */ |
d9fa45fe DC |
9375 | case DW_ATE_imaginary_float: |
9376 | return "DW_ATE_imaginary_float"; | |
b7619582 GF |
9377 | case DW_ATE_packed_decimal: |
9378 | return "DW_ATE_packed_decimal"; | |
9379 | case DW_ATE_numeric_string: | |
9380 | return "DW_ATE_numeric_string"; | |
9381 | case DW_ATE_edited: | |
9382 | return "DW_ATE_edited"; | |
9383 | case DW_ATE_signed_fixed: | |
9384 | return "DW_ATE_signed_fixed"; | |
9385 | case DW_ATE_unsigned_fixed: | |
9386 | return "DW_ATE_unsigned_fixed"; | |
9387 | case DW_ATE_decimal_float: | |
9388 | return "DW_ATE_decimal_float"; | |
9389 | /* HP extensions. */ | |
9390 | case DW_ATE_HP_float80: | |
9391 | return "DW_ATE_HP_float80"; | |
9392 | case DW_ATE_HP_complex_float80: | |
9393 | return "DW_ATE_HP_complex_float80"; | |
9394 | case DW_ATE_HP_float128: | |
9395 | return "DW_ATE_HP_float128"; | |
9396 | case DW_ATE_HP_complex_float128: | |
9397 | return "DW_ATE_HP_complex_float128"; | |
9398 | case DW_ATE_HP_floathpintel: | |
9399 | return "DW_ATE_HP_floathpintel"; | |
9400 | case DW_ATE_HP_imaginary_float80: | |
9401 | return "DW_ATE_HP_imaginary_float80"; | |
9402 | case DW_ATE_HP_imaginary_float128: | |
9403 | return "DW_ATE_HP_imaginary_float128"; | |
c906108c SS |
9404 | default: |
9405 | return "DW_ATE_<unknown>"; | |
9406 | } | |
9407 | } | |
9408 | ||
9409 | /* Convert a DWARF call frame info operation to its string name. */ | |
9410 | ||
9411 | #if 0 | |
9412 | static char * | |
aa1ee363 | 9413 | dwarf_cfi_name (unsigned cfi_opc) |
c906108c SS |
9414 | { |
9415 | switch (cfi_opc) | |
9416 | { | |
9417 | case DW_CFA_advance_loc: | |
9418 | return "DW_CFA_advance_loc"; | |
9419 | case DW_CFA_offset: | |
9420 | return "DW_CFA_offset"; | |
9421 | case DW_CFA_restore: | |
9422 | return "DW_CFA_restore"; | |
9423 | case DW_CFA_nop: | |
9424 | return "DW_CFA_nop"; | |
9425 | case DW_CFA_set_loc: | |
9426 | return "DW_CFA_set_loc"; | |
9427 | case DW_CFA_advance_loc1: | |
9428 | return "DW_CFA_advance_loc1"; | |
9429 | case DW_CFA_advance_loc2: | |
9430 | return "DW_CFA_advance_loc2"; | |
9431 | case DW_CFA_advance_loc4: | |
9432 | return "DW_CFA_advance_loc4"; | |
9433 | case DW_CFA_offset_extended: | |
9434 | return "DW_CFA_offset_extended"; | |
9435 | case DW_CFA_restore_extended: | |
9436 | return "DW_CFA_restore_extended"; | |
9437 | case DW_CFA_undefined: | |
9438 | return "DW_CFA_undefined"; | |
9439 | case DW_CFA_same_value: | |
9440 | return "DW_CFA_same_value"; | |
9441 | case DW_CFA_register: | |
9442 | return "DW_CFA_register"; | |
9443 | case DW_CFA_remember_state: | |
9444 | return "DW_CFA_remember_state"; | |
9445 | case DW_CFA_restore_state: | |
9446 | return "DW_CFA_restore_state"; | |
9447 | case DW_CFA_def_cfa: | |
9448 | return "DW_CFA_def_cfa"; | |
9449 | case DW_CFA_def_cfa_register: | |
9450 | return "DW_CFA_def_cfa_register"; | |
9451 | case DW_CFA_def_cfa_offset: | |
9452 | return "DW_CFA_def_cfa_offset"; | |
b7619582 | 9453 | /* DWARF 3. */ |
985cb1a3 JM |
9454 | case DW_CFA_def_cfa_expression: |
9455 | return "DW_CFA_def_cfa_expression"; | |
9456 | case DW_CFA_expression: | |
9457 | return "DW_CFA_expression"; | |
9458 | case DW_CFA_offset_extended_sf: | |
9459 | return "DW_CFA_offset_extended_sf"; | |
9460 | case DW_CFA_def_cfa_sf: | |
9461 | return "DW_CFA_def_cfa_sf"; | |
9462 | case DW_CFA_def_cfa_offset_sf: | |
9463 | return "DW_CFA_def_cfa_offset_sf"; | |
b7619582 GF |
9464 | case DW_CFA_val_offset: |
9465 | return "DW_CFA_val_offset"; | |
9466 | case DW_CFA_val_offset_sf: | |
9467 | return "DW_CFA_val_offset_sf"; | |
9468 | case DW_CFA_val_expression: | |
9469 | return "DW_CFA_val_expression"; | |
9470 | /* SGI/MIPS specific. */ | |
c906108c SS |
9471 | case DW_CFA_MIPS_advance_loc8: |
9472 | return "DW_CFA_MIPS_advance_loc8"; | |
b7619582 | 9473 | /* GNU extensions. */ |
985cb1a3 JM |
9474 | case DW_CFA_GNU_window_save: |
9475 | return "DW_CFA_GNU_window_save"; | |
9476 | case DW_CFA_GNU_args_size: | |
9477 | return "DW_CFA_GNU_args_size"; | |
9478 | case DW_CFA_GNU_negative_offset_extended: | |
9479 | return "DW_CFA_GNU_negative_offset_extended"; | |
c906108c SS |
9480 | default: |
9481 | return "DW_CFA_<unknown>"; | |
9482 | } | |
9483 | } | |
9484 | #endif | |
9485 | ||
f9aca02d | 9486 | static void |
d97bc12b | 9487 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
9488 | { |
9489 | unsigned int i; | |
9490 | ||
d97bc12b DE |
9491 | print_spaces (indent, f); |
9492 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
c906108c | 9493 | dwarf_tag_name (die->tag), die->abbrev, die->offset); |
d97bc12b DE |
9494 | |
9495 | if (die->parent != NULL) | |
9496 | { | |
9497 | print_spaces (indent, f); | |
9498 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9499 | die->parent->offset); | |
9500 | } | |
9501 | ||
9502 | print_spaces (indent, f); | |
9503 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 9504 | dwarf_bool_name (die->child != NULL)); |
c906108c | 9505 | |
d97bc12b DE |
9506 | print_spaces (indent, f); |
9507 | fprintf_unfiltered (f, " attributes:\n"); | |
9508 | ||
c906108c SS |
9509 | for (i = 0; i < die->num_attrs; ++i) |
9510 | { | |
d97bc12b DE |
9511 | print_spaces (indent, f); |
9512 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
9513 | dwarf_attr_name (die->attrs[i].name), |
9514 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 9515 | |
c906108c SS |
9516 | switch (die->attrs[i].form) |
9517 | { | |
9518 | case DW_FORM_ref_addr: | |
9519 | case DW_FORM_addr: | |
d97bc12b DE |
9520 | fprintf_unfiltered (f, "address: "); |
9521 | fputs_filtered (paddress (DW_ADDR (&die->attrs[i])), f); | |
c906108c SS |
9522 | break; |
9523 | case DW_FORM_block2: | |
9524 | case DW_FORM_block4: | |
9525 | case DW_FORM_block: | |
9526 | case DW_FORM_block1: | |
d97bc12b | 9527 | fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size); |
c906108c | 9528 | break; |
10b3939b DJ |
9529 | case DW_FORM_ref1: |
9530 | case DW_FORM_ref2: | |
9531 | case DW_FORM_ref4: | |
d97bc12b | 9532 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
10b3939b DJ |
9533 | (long) (DW_ADDR (&die->attrs[i]))); |
9534 | break; | |
c906108c SS |
9535 | case DW_FORM_data1: |
9536 | case DW_FORM_data2: | |
9537 | case DW_FORM_data4: | |
ce5d95e1 | 9538 | case DW_FORM_data8: |
c906108c SS |
9539 | case DW_FORM_udata: |
9540 | case DW_FORM_sdata: | |
d97bc12b | 9541 | fprintf_unfiltered (f, "constant: %ld", DW_UNSND (&die->attrs[i])); |
c906108c SS |
9542 | break; |
9543 | case DW_FORM_string: | |
4bdf3d34 | 9544 | case DW_FORM_strp: |
71c25dea | 9545 | case GDB_FORM_cached_string: |
d97bc12b | 9546 | fprintf_unfiltered (f, "string: \"%s\"", |
c906108c | 9547 | DW_STRING (&die->attrs[i]) |
c5aa993b | 9548 | ? DW_STRING (&die->attrs[i]) : ""); |
c906108c SS |
9549 | break; |
9550 | case DW_FORM_flag: | |
9551 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 9552 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 9553 | else |
d97bc12b | 9554 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 9555 | break; |
a8329558 KW |
9556 | case DW_FORM_indirect: |
9557 | /* the reader will have reduced the indirect form to | |
9558 | the "base form" so this form should not occur */ | |
d97bc12b | 9559 | fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 9560 | break; |
c906108c | 9561 | default: |
d97bc12b | 9562 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 9563 | die->attrs[i].form); |
d97bc12b | 9564 | break; |
c906108c | 9565 | } |
d97bc12b | 9566 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
9567 | } |
9568 | } | |
9569 | ||
f9aca02d | 9570 | static void |
d97bc12b | 9571 | dump_die_for_error (struct die_info *die) |
c906108c | 9572 | { |
d97bc12b DE |
9573 | dump_die_shallow (gdb_stderr, 0, die); |
9574 | } | |
9575 | ||
9576 | static void | |
9577 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
9578 | { | |
9579 | int indent = level * 4; | |
9580 | ||
9581 | gdb_assert (die != NULL); | |
9582 | ||
9583 | if (level >= max_level) | |
9584 | return; | |
9585 | ||
9586 | dump_die_shallow (f, indent, die); | |
9587 | ||
9588 | if (die->child != NULL) | |
c906108c | 9589 | { |
d97bc12b DE |
9590 | print_spaces (indent, f); |
9591 | fprintf_unfiltered (f, " Children:"); | |
9592 | if (level + 1 < max_level) | |
9593 | { | |
9594 | fprintf_unfiltered (f, "\n"); | |
9595 | dump_die_1 (f, level + 1, max_level, die->child); | |
9596 | } | |
9597 | else | |
9598 | { | |
9599 | fprintf_unfiltered (f, " [not printed, max nesting level reached]\n"); | |
9600 | } | |
9601 | } | |
9602 | ||
9603 | if (die->sibling != NULL && level > 0) | |
9604 | { | |
9605 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
9606 | } |
9607 | } | |
9608 | ||
d97bc12b DE |
9609 | /* This is called from the pdie macro in gdbinit.in. |
9610 | It's not static so gcc will keep a copy callable from gdb. */ | |
9611 | ||
9612 | void | |
9613 | dump_die (struct die_info *die, int max_level) | |
9614 | { | |
9615 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
9616 | } | |
9617 | ||
f9aca02d | 9618 | static void |
51545339 | 9619 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9620 | { |
51545339 | 9621 | void **slot; |
c906108c | 9622 | |
51545339 DJ |
9623 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT); |
9624 | ||
9625 | *slot = die; | |
c906108c SS |
9626 | } |
9627 | ||
9628 | static unsigned int | |
c764a876 | 9629 | dwarf2_get_ref_die_offset (struct attribute *attr) |
c906108c SS |
9630 | { |
9631 | unsigned int result = 0; | |
9632 | ||
9633 | switch (attr->form) | |
9634 | { | |
9635 | case DW_FORM_ref_addr: | |
c906108c SS |
9636 | case DW_FORM_ref1: |
9637 | case DW_FORM_ref2: | |
9638 | case DW_FORM_ref4: | |
613e1657 | 9639 | case DW_FORM_ref8: |
c906108c | 9640 | case DW_FORM_ref_udata: |
10b3939b | 9641 | result = DW_ADDR (attr); |
c906108c SS |
9642 | break; |
9643 | default: | |
4d3c2250 | 9644 | complaint (&symfile_complaints, |
e2e0b3e5 | 9645 | _("unsupported die ref attribute form: '%s'"), |
4d3c2250 | 9646 | dwarf_form_name (attr->form)); |
c906108c SS |
9647 | } |
9648 | return result; | |
9649 | } | |
9650 | ||
a02abb62 JB |
9651 | /* Return the constant value held by the given attribute. Return -1 |
9652 | if the value held by the attribute is not constant. */ | |
9653 | ||
9654 | static int | |
9655 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) | |
9656 | { | |
9657 | if (attr->form == DW_FORM_sdata) | |
9658 | return DW_SND (attr); | |
9659 | else if (attr->form == DW_FORM_udata | |
9660 | || attr->form == DW_FORM_data1 | |
9661 | || attr->form == DW_FORM_data2 | |
9662 | || attr->form == DW_FORM_data4 | |
9663 | || attr->form == DW_FORM_data8) | |
9664 | return DW_UNSND (attr); | |
9665 | else | |
9666 | { | |
e2e0b3e5 | 9667 | complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"), |
a02abb62 JB |
9668 | dwarf_form_name (attr->form)); |
9669 | return default_value; | |
9670 | } | |
9671 | } | |
9672 | ||
03dd20cc DJ |
9673 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
9674 | unit and add it to our queue. */ | |
9675 | ||
9676 | static void | |
9677 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
9678 | struct dwarf2_per_cu_data *per_cu) | |
9679 | { | |
9680 | /* Mark the dependence relation so that we don't flush PER_CU | |
9681 | too early. */ | |
9682 | dwarf2_add_dependence (this_cu, per_cu); | |
9683 | ||
9684 | /* If it's already on the queue, we have nothing to do. */ | |
9685 | if (per_cu->queued) | |
9686 | return; | |
9687 | ||
9688 | /* If the compilation unit is already loaded, just mark it as | |
9689 | used. */ | |
9690 | if (per_cu->cu != NULL) | |
9691 | { | |
9692 | per_cu->cu->last_used = 0; | |
9693 | return; | |
9694 | } | |
9695 | ||
9696 | /* Add it to the queue. */ | |
9697 | queue_comp_unit (per_cu, this_cu->objfile); | |
9698 | } | |
9699 | ||
f504f079 DE |
9700 | /* Follow reference attribute ATTR of SRC_DIE. |
9701 | On entry *REF_CU is the CU of SRC_DIE. | |
9702 | On exit *REF_CU is the CU of the result. */ | |
9703 | ||
f9aca02d | 9704 | static struct die_info * |
10b3939b | 9705 | follow_die_ref (struct die_info *src_die, struct attribute *attr, |
f2f0e013 | 9706 | struct dwarf2_cu **ref_cu) |
c906108c SS |
9707 | { |
9708 | struct die_info *die; | |
10b3939b | 9709 | unsigned int offset; |
10b3939b | 9710 | struct die_info temp_die; |
f2f0e013 | 9711 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 9712 | |
c764a876 | 9713 | offset = dwarf2_get_ref_die_offset (attr); |
10b3939b | 9714 | |
45452591 | 9715 | if (! offset_in_cu_p (&cu->header, offset)) |
10b3939b DJ |
9716 | { |
9717 | struct dwarf2_per_cu_data *per_cu; | |
45452591 | 9718 | per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile); |
03dd20cc DJ |
9719 | |
9720 | /* If necessary, add it to the queue and load its DIEs. */ | |
9721 | maybe_queue_comp_unit (cu, per_cu); | |
9722 | ||
10b3939b DJ |
9723 | target_cu = per_cu->cu; |
9724 | } | |
9725 | else | |
9726 | target_cu = cu; | |
c906108c | 9727 | |
f2f0e013 | 9728 | *ref_cu = target_cu; |
51545339 DJ |
9729 | temp_die.offset = offset; |
9730 | die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset); | |
9731 | if (die) | |
9732 | return die; | |
10b3939b | 9733 | |
8a3fe4f8 AC |
9734 | error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE " |
9735 | "at 0x%lx [in module %s]"), | |
1d325ec1 | 9736 | (long) offset, (long) src_die->offset, cu->objfile->name); |
c906108c SS |
9737 | } |
9738 | ||
c906108c SS |
9739 | /* Decode simple location descriptions. |
9740 | Given a pointer to a dwarf block that defines a location, compute | |
9741 | the location and return the value. | |
9742 | ||
4cecd739 DJ |
9743 | NOTE drow/2003-11-18: This function is called in two situations |
9744 | now: for the address of static or global variables (partial symbols | |
9745 | only) and for offsets into structures which are expected to be | |
9746 | (more or less) constant. The partial symbol case should go away, | |
9747 | and only the constant case should remain. That will let this | |
9748 | function complain more accurately. A few special modes are allowed | |
9749 | without complaint for global variables (for instance, global | |
9750 | register values and thread-local values). | |
c906108c SS |
9751 | |
9752 | A location description containing no operations indicates that the | |
4cecd739 | 9753 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
9754 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
9755 | callers will only want a very basic result and this can become a | |
9756 | complaint. | |
c906108c | 9757 | |
c906108c SS |
9758 | Note that stack[0] is unused except as a default error return. |
9759 | Note that stack overflow is not yet handled. */ | |
9760 | ||
9761 | static CORE_ADDR | |
e7c27a73 | 9762 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 9763 | { |
e7c27a73 DJ |
9764 | struct objfile *objfile = cu->objfile; |
9765 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c SS |
9766 | int i; |
9767 | int size = blk->size; | |
fe1b8b76 | 9768 | gdb_byte *data = blk->data; |
c906108c SS |
9769 | CORE_ADDR stack[64]; |
9770 | int stacki; | |
9771 | unsigned int bytes_read, unsnd; | |
fe1b8b76 | 9772 | gdb_byte op; |
c906108c SS |
9773 | |
9774 | i = 0; | |
9775 | stacki = 0; | |
9776 | stack[stacki] = 0; | |
c906108c SS |
9777 | |
9778 | while (i < size) | |
9779 | { | |
c906108c SS |
9780 | op = data[i++]; |
9781 | switch (op) | |
9782 | { | |
f1bea926 JM |
9783 | case DW_OP_lit0: |
9784 | case DW_OP_lit1: | |
9785 | case DW_OP_lit2: | |
9786 | case DW_OP_lit3: | |
9787 | case DW_OP_lit4: | |
9788 | case DW_OP_lit5: | |
9789 | case DW_OP_lit6: | |
9790 | case DW_OP_lit7: | |
9791 | case DW_OP_lit8: | |
9792 | case DW_OP_lit9: | |
9793 | case DW_OP_lit10: | |
9794 | case DW_OP_lit11: | |
9795 | case DW_OP_lit12: | |
9796 | case DW_OP_lit13: | |
9797 | case DW_OP_lit14: | |
9798 | case DW_OP_lit15: | |
9799 | case DW_OP_lit16: | |
9800 | case DW_OP_lit17: | |
9801 | case DW_OP_lit18: | |
9802 | case DW_OP_lit19: | |
9803 | case DW_OP_lit20: | |
9804 | case DW_OP_lit21: | |
9805 | case DW_OP_lit22: | |
9806 | case DW_OP_lit23: | |
9807 | case DW_OP_lit24: | |
9808 | case DW_OP_lit25: | |
9809 | case DW_OP_lit26: | |
9810 | case DW_OP_lit27: | |
9811 | case DW_OP_lit28: | |
9812 | case DW_OP_lit29: | |
9813 | case DW_OP_lit30: | |
9814 | case DW_OP_lit31: | |
9815 | stack[++stacki] = op - DW_OP_lit0; | |
9816 | break; | |
9817 | ||
c906108c SS |
9818 | case DW_OP_reg0: |
9819 | case DW_OP_reg1: | |
9820 | case DW_OP_reg2: | |
9821 | case DW_OP_reg3: | |
9822 | case DW_OP_reg4: | |
9823 | case DW_OP_reg5: | |
9824 | case DW_OP_reg6: | |
9825 | case DW_OP_reg7: | |
9826 | case DW_OP_reg8: | |
9827 | case DW_OP_reg9: | |
9828 | case DW_OP_reg10: | |
9829 | case DW_OP_reg11: | |
9830 | case DW_OP_reg12: | |
9831 | case DW_OP_reg13: | |
9832 | case DW_OP_reg14: | |
9833 | case DW_OP_reg15: | |
9834 | case DW_OP_reg16: | |
9835 | case DW_OP_reg17: | |
9836 | case DW_OP_reg18: | |
9837 | case DW_OP_reg19: | |
9838 | case DW_OP_reg20: | |
9839 | case DW_OP_reg21: | |
9840 | case DW_OP_reg22: | |
9841 | case DW_OP_reg23: | |
9842 | case DW_OP_reg24: | |
9843 | case DW_OP_reg25: | |
9844 | case DW_OP_reg26: | |
9845 | case DW_OP_reg27: | |
9846 | case DW_OP_reg28: | |
9847 | case DW_OP_reg29: | |
9848 | case DW_OP_reg30: | |
9849 | case DW_OP_reg31: | |
c906108c | 9850 | stack[++stacki] = op - DW_OP_reg0; |
4cecd739 DJ |
9851 | if (i < size) |
9852 | dwarf2_complex_location_expr_complaint (); | |
c906108c SS |
9853 | break; |
9854 | ||
9855 | case DW_OP_regx: | |
c906108c SS |
9856 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
9857 | i += bytes_read; | |
c906108c | 9858 | stack[++stacki] = unsnd; |
4cecd739 DJ |
9859 | if (i < size) |
9860 | dwarf2_complex_location_expr_complaint (); | |
c906108c SS |
9861 | break; |
9862 | ||
9863 | case DW_OP_addr: | |
107d2387 | 9864 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
e7c27a73 | 9865 | cu, &bytes_read); |
107d2387 | 9866 | i += bytes_read; |
c906108c SS |
9867 | break; |
9868 | ||
9869 | case DW_OP_const1u: | |
9870 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
9871 | i += 1; | |
9872 | break; | |
9873 | ||
9874 | case DW_OP_const1s: | |
9875 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
9876 | i += 1; | |
9877 | break; | |
9878 | ||
9879 | case DW_OP_const2u: | |
9880 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
9881 | i += 2; | |
9882 | break; | |
9883 | ||
9884 | case DW_OP_const2s: | |
9885 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
9886 | i += 2; | |
9887 | break; | |
9888 | ||
9889 | case DW_OP_const4u: | |
9890 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
9891 | i += 4; | |
9892 | break; | |
9893 | ||
9894 | case DW_OP_const4s: | |
9895 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
9896 | i += 4; | |
9897 | break; | |
9898 | ||
9899 | case DW_OP_constu: | |
9900 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
c5aa993b | 9901 | &bytes_read); |
c906108c SS |
9902 | i += bytes_read; |
9903 | break; | |
9904 | ||
9905 | case DW_OP_consts: | |
9906 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
9907 | i += bytes_read; | |
9908 | break; | |
9909 | ||
f1bea926 JM |
9910 | case DW_OP_dup: |
9911 | stack[stacki + 1] = stack[stacki]; | |
9912 | stacki++; | |
9913 | break; | |
9914 | ||
c906108c SS |
9915 | case DW_OP_plus: |
9916 | stack[stacki - 1] += stack[stacki]; | |
9917 | stacki--; | |
9918 | break; | |
9919 | ||
9920 | case DW_OP_plus_uconst: | |
9921 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
9922 | i += bytes_read; | |
9923 | break; | |
9924 | ||
9925 | case DW_OP_minus: | |
f1bea926 | 9926 | stack[stacki - 1] -= stack[stacki]; |
c906108c SS |
9927 | stacki--; |
9928 | break; | |
9929 | ||
7a292a7a | 9930 | case DW_OP_deref: |
7a292a7a | 9931 | /* If we're not the last op, then we definitely can't encode |
4cecd739 DJ |
9932 | this using GDB's address_class enum. This is valid for partial |
9933 | global symbols, although the variable's address will be bogus | |
9934 | in the psymtab. */ | |
7a292a7a | 9935 | if (i < size) |
4d3c2250 | 9936 | dwarf2_complex_location_expr_complaint (); |
7a292a7a SS |
9937 | break; |
9938 | ||
9d774e44 | 9939 | case DW_OP_GNU_push_tls_address: |
9d774e44 EZ |
9940 | /* The top of the stack has the offset from the beginning |
9941 | of the thread control block at which the variable is located. */ | |
9942 | /* Nothing should follow this operator, so the top of stack would | |
9943 | be returned. */ | |
4cecd739 DJ |
9944 | /* This is valid for partial global symbols, but the variable's |
9945 | address will be bogus in the psymtab. */ | |
9d774e44 | 9946 | if (i < size) |
4d3c2250 | 9947 | dwarf2_complex_location_expr_complaint (); |
9d774e44 EZ |
9948 | break; |
9949 | ||
42be36b3 CT |
9950 | case DW_OP_GNU_uninit: |
9951 | break; | |
9952 | ||
c906108c | 9953 | default: |
e2e0b3e5 | 9954 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), |
4d3c2250 | 9955 | dwarf_stack_op_name (op)); |
c906108c SS |
9956 | return (stack[stacki]); |
9957 | } | |
9958 | } | |
9959 | return (stack[stacki]); | |
9960 | } | |
9961 | ||
9962 | /* memory allocation interface */ | |
9963 | ||
c906108c | 9964 | static struct dwarf_block * |
7b5a2f43 | 9965 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
9966 | { |
9967 | struct dwarf_block *blk; | |
9968 | ||
9969 | blk = (struct dwarf_block *) | |
7b5a2f43 | 9970 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
9971 | return (blk); |
9972 | } | |
9973 | ||
9974 | static struct abbrev_info * | |
f3dd6933 | 9975 | dwarf_alloc_abbrev (struct dwarf2_cu *cu) |
c906108c SS |
9976 | { |
9977 | struct abbrev_info *abbrev; | |
9978 | ||
f3dd6933 DJ |
9979 | abbrev = (struct abbrev_info *) |
9980 | obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info)); | |
c906108c SS |
9981 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
9982 | return (abbrev); | |
9983 | } | |
9984 | ||
9985 | static struct die_info * | |
b60c80d6 | 9986 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
9987 | { |
9988 | struct die_info *die; | |
b60c80d6 DJ |
9989 | size_t size = sizeof (struct die_info); |
9990 | ||
9991 | if (num_attrs > 1) | |
9992 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 9993 | |
b60c80d6 | 9994 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
9995 | memset (die, 0, sizeof (struct die_info)); |
9996 | return (die); | |
9997 | } | |
2e276125 JB |
9998 | |
9999 | \f | |
10000 | /* Macro support. */ | |
10001 | ||
10002 | ||
10003 | /* Return the full name of file number I in *LH's file name table. | |
10004 | Use COMP_DIR as the name of the current directory of the | |
10005 | compilation. The result is allocated using xmalloc; the caller is | |
10006 | responsible for freeing it. */ | |
10007 | static char * | |
10008 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
10009 | { | |
6a83a1e6 EZ |
10010 | /* Is the file number a valid index into the line header's file name |
10011 | table? Remember that file numbers start with one, not zero. */ | |
10012 | if (1 <= file && file <= lh->num_file_names) | |
10013 | { | |
10014 | struct file_entry *fe = &lh->file_names[file - 1]; | |
2e276125 | 10015 | |
6a83a1e6 EZ |
10016 | if (IS_ABSOLUTE_PATH (fe->name)) |
10017 | return xstrdup (fe->name); | |
10018 | else | |
10019 | { | |
10020 | const char *dir; | |
10021 | int dir_len; | |
10022 | char *full_name; | |
10023 | ||
10024 | if (fe->dir_index) | |
10025 | dir = lh->include_dirs[fe->dir_index - 1]; | |
10026 | else | |
10027 | dir = comp_dir; | |
10028 | ||
10029 | if (dir) | |
10030 | { | |
10031 | dir_len = strlen (dir); | |
10032 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); | |
10033 | strcpy (full_name, dir); | |
10034 | full_name[dir_len] = '/'; | |
10035 | strcpy (full_name + dir_len + 1, fe->name); | |
10036 | return full_name; | |
10037 | } | |
10038 | else | |
10039 | return xstrdup (fe->name); | |
10040 | } | |
10041 | } | |
2e276125 JB |
10042 | else |
10043 | { | |
6a83a1e6 EZ |
10044 | /* The compiler produced a bogus file number. We can at least |
10045 | record the macro definitions made in the file, even if we | |
10046 | won't be able to find the file by name. */ | |
10047 | char fake_name[80]; | |
10048 | sprintf (fake_name, "<bad macro file number %d>", file); | |
2e276125 | 10049 | |
6a83a1e6 EZ |
10050 | complaint (&symfile_complaints, |
10051 | _("bad file number in macro information (%d)"), | |
10052 | file); | |
2e276125 | 10053 | |
6a83a1e6 | 10054 | return xstrdup (fake_name); |
2e276125 JB |
10055 | } |
10056 | } | |
10057 | ||
10058 | ||
10059 | static struct macro_source_file * | |
10060 | macro_start_file (int file, int line, | |
10061 | struct macro_source_file *current_file, | |
10062 | const char *comp_dir, | |
10063 | struct line_header *lh, struct objfile *objfile) | |
10064 | { | |
10065 | /* The full name of this source file. */ | |
10066 | char *full_name = file_full_name (file, lh, comp_dir); | |
10067 | ||
10068 | /* We don't create a macro table for this compilation unit | |
10069 | at all until we actually get a filename. */ | |
10070 | if (! pending_macros) | |
4a146b47 | 10071 | pending_macros = new_macro_table (&objfile->objfile_obstack, |
af5f3db6 | 10072 | objfile->macro_cache); |
2e276125 JB |
10073 | |
10074 | if (! current_file) | |
10075 | /* If we have no current file, then this must be the start_file | |
10076 | directive for the compilation unit's main source file. */ | |
10077 | current_file = macro_set_main (pending_macros, full_name); | |
10078 | else | |
10079 | current_file = macro_include (current_file, line, full_name); | |
10080 | ||
10081 | xfree (full_name); | |
10082 | ||
10083 | return current_file; | |
10084 | } | |
10085 | ||
10086 | ||
10087 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
10088 | followed by a null byte. */ | |
10089 | static char * | |
10090 | copy_string (const char *buf, int len) | |
10091 | { | |
10092 | char *s = xmalloc (len + 1); | |
10093 | memcpy (s, buf, len); | |
10094 | s[len] = '\0'; | |
10095 | ||
10096 | return s; | |
10097 | } | |
10098 | ||
10099 | ||
10100 | static const char * | |
10101 | consume_improper_spaces (const char *p, const char *body) | |
10102 | { | |
10103 | if (*p == ' ') | |
10104 | { | |
4d3c2250 | 10105 | complaint (&symfile_complaints, |
e2e0b3e5 | 10106 | _("macro definition contains spaces in formal argument list:\n`%s'"), |
4d3c2250 | 10107 | body); |
2e276125 JB |
10108 | |
10109 | while (*p == ' ') | |
10110 | p++; | |
10111 | } | |
10112 | ||
10113 | return p; | |
10114 | } | |
10115 | ||
10116 | ||
10117 | static void | |
10118 | parse_macro_definition (struct macro_source_file *file, int line, | |
10119 | const char *body) | |
10120 | { | |
10121 | const char *p; | |
10122 | ||
10123 | /* The body string takes one of two forms. For object-like macro | |
10124 | definitions, it should be: | |
10125 | ||
10126 | <macro name> " " <definition> | |
10127 | ||
10128 | For function-like macro definitions, it should be: | |
10129 | ||
10130 | <macro name> "() " <definition> | |
10131 | or | |
10132 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
10133 | ||
10134 | Spaces may appear only where explicitly indicated, and in the | |
10135 | <definition>. | |
10136 | ||
10137 | The Dwarf 2 spec says that an object-like macro's name is always | |
10138 | followed by a space, but versions of GCC around March 2002 omit | |
10139 | the space when the macro's definition is the empty string. | |
10140 | ||
10141 | The Dwarf 2 spec says that there should be no spaces between the | |
10142 | formal arguments in a function-like macro's formal argument list, | |
10143 | but versions of GCC around March 2002 include spaces after the | |
10144 | commas. */ | |
10145 | ||
10146 | ||
10147 | /* Find the extent of the macro name. The macro name is terminated | |
10148 | by either a space or null character (for an object-like macro) or | |
10149 | an opening paren (for a function-like macro). */ | |
10150 | for (p = body; *p; p++) | |
10151 | if (*p == ' ' || *p == '(') | |
10152 | break; | |
10153 | ||
10154 | if (*p == ' ' || *p == '\0') | |
10155 | { | |
10156 | /* It's an object-like macro. */ | |
10157 | int name_len = p - body; | |
10158 | char *name = copy_string (body, name_len); | |
10159 | const char *replacement; | |
10160 | ||
10161 | if (*p == ' ') | |
10162 | replacement = body + name_len + 1; | |
10163 | else | |
10164 | { | |
4d3c2250 | 10165 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10166 | replacement = body + name_len; |
10167 | } | |
10168 | ||
10169 | macro_define_object (file, line, name, replacement); | |
10170 | ||
10171 | xfree (name); | |
10172 | } | |
10173 | else if (*p == '(') | |
10174 | { | |
10175 | /* It's a function-like macro. */ | |
10176 | char *name = copy_string (body, p - body); | |
10177 | int argc = 0; | |
10178 | int argv_size = 1; | |
10179 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
10180 | ||
10181 | p++; | |
10182 | ||
10183 | p = consume_improper_spaces (p, body); | |
10184 | ||
10185 | /* Parse the formal argument list. */ | |
10186 | while (*p && *p != ')') | |
10187 | { | |
10188 | /* Find the extent of the current argument name. */ | |
10189 | const char *arg_start = p; | |
10190 | ||
10191 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
10192 | p++; | |
10193 | ||
10194 | if (! *p || p == arg_start) | |
4d3c2250 | 10195 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10196 | else |
10197 | { | |
10198 | /* Make sure argv has room for the new argument. */ | |
10199 | if (argc >= argv_size) | |
10200 | { | |
10201 | argv_size *= 2; | |
10202 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
10203 | } | |
10204 | ||
10205 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
10206 | } | |
10207 | ||
10208 | p = consume_improper_spaces (p, body); | |
10209 | ||
10210 | /* Consume the comma, if present. */ | |
10211 | if (*p == ',') | |
10212 | { | |
10213 | p++; | |
10214 | ||
10215 | p = consume_improper_spaces (p, body); | |
10216 | } | |
10217 | } | |
10218 | ||
10219 | if (*p == ')') | |
10220 | { | |
10221 | p++; | |
10222 | ||
10223 | if (*p == ' ') | |
10224 | /* Perfectly formed definition, no complaints. */ | |
10225 | macro_define_function (file, line, name, | |
10226 | argc, (const char **) argv, | |
10227 | p + 1); | |
10228 | else if (*p == '\0') | |
10229 | { | |
10230 | /* Complain, but do define it. */ | |
4d3c2250 | 10231 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10232 | macro_define_function (file, line, name, |
10233 | argc, (const char **) argv, | |
10234 | p); | |
10235 | } | |
10236 | else | |
10237 | /* Just complain. */ | |
4d3c2250 | 10238 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10239 | } |
10240 | else | |
10241 | /* Just complain. */ | |
4d3c2250 | 10242 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10243 | |
10244 | xfree (name); | |
10245 | { | |
10246 | int i; | |
10247 | ||
10248 | for (i = 0; i < argc; i++) | |
10249 | xfree (argv[i]); | |
10250 | } | |
10251 | xfree (argv); | |
10252 | } | |
10253 | else | |
4d3c2250 | 10254 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
10255 | } |
10256 | ||
10257 | ||
10258 | static void | |
10259 | dwarf_decode_macros (struct line_header *lh, unsigned int offset, | |
10260 | char *comp_dir, bfd *abfd, | |
e7c27a73 | 10261 | struct dwarf2_cu *cu) |
2e276125 | 10262 | { |
fe1b8b76 | 10263 | gdb_byte *mac_ptr, *mac_end; |
2e276125 | 10264 | struct macro_source_file *current_file = 0; |
757a13d0 JK |
10265 | enum dwarf_macinfo_record_type macinfo_type; |
10266 | int at_commandline; | |
2e276125 | 10267 | |
dce234bc | 10268 | if (dwarf2_per_objfile->macinfo.buffer == NULL) |
2e276125 | 10269 | { |
e2e0b3e5 | 10270 | complaint (&symfile_complaints, _("missing .debug_macinfo section")); |
2e276125 JB |
10271 | return; |
10272 | } | |
10273 | ||
757a13d0 JK |
10274 | /* First pass: Find the name of the base filename. |
10275 | This filename is needed in order to process all macros whose definition | |
10276 | (or undefinition) comes from the command line. These macros are defined | |
10277 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
10278 | associated to the base file. | |
10279 | ||
10280 | To determine the base file name, we scan the macro definitions until we | |
10281 | reach the first DW_MACINFO_start_file entry. We then initialize | |
10282 | CURRENT_FILE accordingly so that any macro definition found before the | |
10283 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
10284 | ||
dce234bc PP |
10285 | mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset; |
10286 | mac_end = dwarf2_per_objfile->macinfo.buffer | |
10287 | + dwarf2_per_objfile->macinfo.size; | |
2e276125 | 10288 | |
757a13d0 | 10289 | do |
2e276125 | 10290 | { |
2e276125 JB |
10291 | /* Do we at least have room for a macinfo type byte? */ |
10292 | if (mac_ptr >= mac_end) | |
10293 | { | |
757a13d0 JK |
10294 | /* Complaint is printed during the second pass as GDB will probably |
10295 | stop the first pass earlier upon finding DW_MACINFO_start_file. */ | |
10296 | break; | |
2e276125 JB |
10297 | } |
10298 | ||
10299 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
10300 | mac_ptr++; | |
10301 | ||
10302 | switch (macinfo_type) | |
10303 | { | |
10304 | /* A zero macinfo type indicates the end of the macro | |
10305 | information. */ | |
10306 | case 0: | |
757a13d0 JK |
10307 | break; |
10308 | ||
10309 | case DW_MACINFO_define: | |
10310 | case DW_MACINFO_undef: | |
10311 | /* Only skip the data by MAC_PTR. */ | |
10312 | { | |
10313 | unsigned int bytes_read; | |
10314 | ||
10315 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10316 | mac_ptr += bytes_read; | |
10317 | read_string (abfd, mac_ptr, &bytes_read); | |
10318 | mac_ptr += bytes_read; | |
10319 | } | |
10320 | break; | |
10321 | ||
10322 | case DW_MACINFO_start_file: | |
10323 | { | |
10324 | unsigned int bytes_read; | |
10325 | int line, file; | |
10326 | ||
10327 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10328 | mac_ptr += bytes_read; | |
10329 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10330 | mac_ptr += bytes_read; | |
10331 | ||
10332 | current_file = macro_start_file (file, line, current_file, comp_dir, | |
10333 | lh, cu->objfile); | |
10334 | } | |
10335 | break; | |
10336 | ||
10337 | case DW_MACINFO_end_file: | |
10338 | /* No data to skip by MAC_PTR. */ | |
10339 | break; | |
10340 | ||
10341 | case DW_MACINFO_vendor_ext: | |
10342 | /* Only skip the data by MAC_PTR. */ | |
10343 | { | |
10344 | unsigned int bytes_read; | |
10345 | ||
10346 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10347 | mac_ptr += bytes_read; | |
10348 | read_string (abfd, mac_ptr, &bytes_read); | |
10349 | mac_ptr += bytes_read; | |
10350 | } | |
10351 | break; | |
10352 | ||
10353 | default: | |
10354 | break; | |
10355 | } | |
10356 | } while (macinfo_type != 0 && current_file == NULL); | |
10357 | ||
10358 | /* Second pass: Process all entries. | |
10359 | ||
10360 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
10361 | command-line macro definitions/undefinitions. This flag is unset when we | |
10362 | reach the first DW_MACINFO_start_file entry. */ | |
10363 | ||
dce234bc | 10364 | mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset; |
757a13d0 JK |
10365 | |
10366 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
10367 | GDB is still reading the definitions from command line. First | |
10368 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
10369 | to create CURRENT_FILE for the main source holding also the command line | |
10370 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
10371 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
10372 | ||
10373 | at_commandline = 1; | |
10374 | ||
10375 | do | |
10376 | { | |
10377 | /* Do we at least have room for a macinfo type byte? */ | |
10378 | if (mac_ptr >= mac_end) | |
10379 | { | |
10380 | dwarf2_macros_too_long_complaint (); | |
10381 | break; | |
10382 | } | |
10383 | ||
10384 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
10385 | mac_ptr++; | |
10386 | ||
10387 | switch (macinfo_type) | |
10388 | { | |
10389 | /* A zero macinfo type indicates the end of the macro | |
10390 | information. */ | |
10391 | case 0: | |
10392 | break; | |
2e276125 JB |
10393 | |
10394 | case DW_MACINFO_define: | |
10395 | case DW_MACINFO_undef: | |
10396 | { | |
891d2f0b | 10397 | unsigned int bytes_read; |
2e276125 JB |
10398 | int line; |
10399 | char *body; | |
10400 | ||
10401 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10402 | mac_ptr += bytes_read; | |
10403 | body = read_string (abfd, mac_ptr, &bytes_read); | |
10404 | mac_ptr += bytes_read; | |
10405 | ||
10406 | if (! current_file) | |
757a13d0 JK |
10407 | { |
10408 | /* DWARF violation as no main source is present. */ | |
10409 | complaint (&symfile_complaints, | |
10410 | _("debug info with no main source gives macro %s " | |
10411 | "on line %d: %s"), | |
10412 | macinfo_type == | |
10413 | DW_MACINFO_define ? _("definition") : macinfo_type == | |
10414 | DW_MACINFO_undef ? _("undefinition") : | |
10415 | "something-or-other", line, body); | |
10416 | break; | |
10417 | } | |
10418 | if ((line == 0 && !at_commandline) || (line != 0 && at_commandline)) | |
4d3c2250 | 10419 | complaint (&symfile_complaints, |
757a13d0 JK |
10420 | _("debug info gives %s macro %s with %s line %d: %s"), |
10421 | at_commandline ? _("command-line") : _("in-file"), | |
4d3c2250 | 10422 | macinfo_type == |
757a13d0 JK |
10423 | DW_MACINFO_define ? _("definition") : macinfo_type == |
10424 | DW_MACINFO_undef ? _("undefinition") : | |
10425 | "something-or-other", | |
10426 | line == 0 ? _("zero") : _("non-zero"), line, body); | |
10427 | ||
10428 | if (macinfo_type == DW_MACINFO_define) | |
10429 | parse_macro_definition (current_file, line, body); | |
10430 | else if (macinfo_type == DW_MACINFO_undef) | |
10431 | macro_undef (current_file, line, body); | |
2e276125 JB |
10432 | } |
10433 | break; | |
10434 | ||
10435 | case DW_MACINFO_start_file: | |
10436 | { | |
891d2f0b | 10437 | unsigned int bytes_read; |
2e276125 JB |
10438 | int line, file; |
10439 | ||
10440 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10441 | mac_ptr += bytes_read; | |
10442 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10443 | mac_ptr += bytes_read; | |
10444 | ||
757a13d0 JK |
10445 | if ((line == 0 && !at_commandline) || (line != 0 && at_commandline)) |
10446 | complaint (&symfile_complaints, | |
10447 | _("debug info gives source %d included " | |
10448 | "from %s at %s line %d"), | |
10449 | file, at_commandline ? _("command-line") : _("file"), | |
10450 | line == 0 ? _("zero") : _("non-zero"), line); | |
10451 | ||
10452 | if (at_commandline) | |
10453 | { | |
10454 | /* This DW_MACINFO_start_file was executed in the pass one. */ | |
10455 | at_commandline = 0; | |
10456 | } | |
10457 | else | |
10458 | current_file = macro_start_file (file, line, | |
10459 | current_file, comp_dir, | |
10460 | lh, cu->objfile); | |
2e276125 JB |
10461 | } |
10462 | break; | |
10463 | ||
10464 | case DW_MACINFO_end_file: | |
10465 | if (! current_file) | |
4d3c2250 | 10466 | complaint (&symfile_complaints, |
e2e0b3e5 | 10467 | _("macro debug info has an unmatched `close_file' directive")); |
2e276125 JB |
10468 | else |
10469 | { | |
10470 | current_file = current_file->included_by; | |
10471 | if (! current_file) | |
10472 | { | |
10473 | enum dwarf_macinfo_record_type next_type; | |
10474 | ||
10475 | /* GCC circa March 2002 doesn't produce the zero | |
10476 | type byte marking the end of the compilation | |
10477 | unit. Complain if it's not there, but exit no | |
10478 | matter what. */ | |
10479 | ||
10480 | /* Do we at least have room for a macinfo type byte? */ | |
10481 | if (mac_ptr >= mac_end) | |
10482 | { | |
4d3c2250 | 10483 | dwarf2_macros_too_long_complaint (); |
2e276125 JB |
10484 | return; |
10485 | } | |
10486 | ||
10487 | /* We don't increment mac_ptr here, so this is just | |
10488 | a look-ahead. */ | |
10489 | next_type = read_1_byte (abfd, mac_ptr); | |
10490 | if (next_type != 0) | |
4d3c2250 | 10491 | complaint (&symfile_complaints, |
e2e0b3e5 | 10492 | _("no terminating 0-type entry for macros in `.debug_macinfo' section")); |
2e276125 JB |
10493 | |
10494 | return; | |
10495 | } | |
10496 | } | |
10497 | break; | |
10498 | ||
10499 | case DW_MACINFO_vendor_ext: | |
10500 | { | |
891d2f0b | 10501 | unsigned int bytes_read; |
2e276125 JB |
10502 | int constant; |
10503 | char *string; | |
10504 | ||
10505 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
10506 | mac_ptr += bytes_read; | |
10507 | string = read_string (abfd, mac_ptr, &bytes_read); | |
10508 | mac_ptr += bytes_read; | |
10509 | ||
10510 | /* We don't recognize any vendor extensions. */ | |
10511 | } | |
10512 | break; | |
10513 | } | |
757a13d0 | 10514 | } while (macinfo_type != 0); |
2e276125 | 10515 | } |
8e19ed76 PS |
10516 | |
10517 | /* Check if the attribute's form is a DW_FORM_block* | |
10518 | if so return true else false. */ | |
10519 | static int | |
10520 | attr_form_is_block (struct attribute *attr) | |
10521 | { | |
10522 | return (attr == NULL ? 0 : | |
10523 | attr->form == DW_FORM_block1 | |
10524 | || attr->form == DW_FORM_block2 | |
10525 | || attr->form == DW_FORM_block4 | |
10526 | || attr->form == DW_FORM_block); | |
10527 | } | |
4c2df51b | 10528 | |
c6a0999f JB |
10529 | /* Return non-zero if ATTR's value is a section offset --- classes |
10530 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
10531 | You may use DW_UNSND (attr) to retrieve such offsets. | |
10532 | ||
10533 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
10534 | may have a value that belongs to more than one of these classes; it | |
10535 | would be ambiguous if we did, because we use the same forms for all | |
10536 | of them. */ | |
3690dd37 JB |
10537 | static int |
10538 | attr_form_is_section_offset (struct attribute *attr) | |
10539 | { | |
10540 | return (attr->form == DW_FORM_data4 | |
10541 | || attr->form == DW_FORM_data8); | |
10542 | } | |
10543 | ||
10544 | ||
10545 | /* Return non-zero if ATTR's value falls in the 'constant' class, or | |
10546 | zero otherwise. When this function returns true, you can apply | |
10547 | dwarf2_get_attr_constant_value to it. | |
10548 | ||
10549 | However, note that for some attributes you must check | |
10550 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
10551 | and DW_FORM_data8 are members of both the constant class, and of | |
10552 | the classes that contain offsets into other debug sections | |
10553 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
10554 | that, if an attribute's can be either a constant or one of the | |
10555 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
10556 | taken as section offsets, not constants. */ | |
10557 | static int | |
10558 | attr_form_is_constant (struct attribute *attr) | |
10559 | { | |
10560 | switch (attr->form) | |
10561 | { | |
10562 | case DW_FORM_sdata: | |
10563 | case DW_FORM_udata: | |
10564 | case DW_FORM_data1: | |
10565 | case DW_FORM_data2: | |
10566 | case DW_FORM_data4: | |
10567 | case DW_FORM_data8: | |
10568 | return 1; | |
10569 | default: | |
10570 | return 0; | |
10571 | } | |
10572 | } | |
10573 | ||
4c2df51b DJ |
10574 | static void |
10575 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 10576 | struct dwarf2_cu *cu) |
4c2df51b | 10577 | { |
3690dd37 | 10578 | if (attr_form_is_section_offset (attr) |
99bcc461 DJ |
10579 | /* ".debug_loc" may not exist at all, or the offset may be outside |
10580 | the section. If so, fall through to the complaint in the | |
10581 | other branch. */ | |
dce234bc | 10582 | && DW_UNSND (attr) < dwarf2_per_objfile->loc.size) |
4c2df51b | 10583 | { |
0d53c4c4 | 10584 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 10585 | |
4a146b47 | 10586 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
0d53c4c4 | 10587 | sizeof (struct dwarf2_loclist_baton)); |
ae0d2f24 UW |
10588 | baton->per_cu = cu->per_cu; |
10589 | gdb_assert (baton->per_cu); | |
4c2df51b | 10590 | |
0d53c4c4 DJ |
10591 | /* We don't know how long the location list is, but make sure we |
10592 | don't run off the edge of the section. */ | |
dce234bc PP |
10593 | baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr); |
10594 | baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr); | |
d00adf39 DE |
10595 | baton->base_address = cu->base_address; |
10596 | if (cu->base_known == 0) | |
0d53c4c4 | 10597 | complaint (&symfile_complaints, |
e2e0b3e5 | 10598 | _("Location list used without specifying the CU base address.")); |
4c2df51b | 10599 | |
768a979c | 10600 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs; |
0d53c4c4 DJ |
10601 | SYMBOL_LOCATION_BATON (sym) = baton; |
10602 | } | |
10603 | else | |
10604 | { | |
10605 | struct dwarf2_locexpr_baton *baton; | |
10606 | ||
4a146b47 | 10607 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
0d53c4c4 | 10608 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
10609 | baton->per_cu = cu->per_cu; |
10610 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
10611 | |
10612 | if (attr_form_is_block (attr)) | |
10613 | { | |
10614 | /* Note that we're just copying the block's data pointer | |
10615 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
10616 | info_buffer for SYM's objfile; right now we never release |
10617 | that buffer, but when we do clean up properly this may | |
10618 | need to change. */ | |
0d53c4c4 DJ |
10619 | baton->size = DW_BLOCK (attr)->size; |
10620 | baton->data = DW_BLOCK (attr)->data; | |
10621 | } | |
10622 | else | |
10623 | { | |
10624 | dwarf2_invalid_attrib_class_complaint ("location description", | |
10625 | SYMBOL_NATURAL_NAME (sym)); | |
10626 | baton->size = 0; | |
10627 | baton->data = NULL; | |
10628 | } | |
10629 | ||
768a979c | 10630 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; |
0d53c4c4 DJ |
10631 | SYMBOL_LOCATION_BATON (sym) = baton; |
10632 | } | |
4c2df51b | 10633 | } |
6502dd73 | 10634 | |
ae0d2f24 UW |
10635 | /* Return the OBJFILE associated with the compilation unit CU. */ |
10636 | ||
10637 | struct objfile * | |
10638 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
10639 | { | |
10640 | struct objfile *objfile = per_cu->psymtab->objfile; | |
10641 | ||
10642 | /* Return the master objfile, so that we can report and look up the | |
10643 | correct file containing this variable. */ | |
10644 | if (objfile->separate_debug_objfile_backlink) | |
10645 | objfile = objfile->separate_debug_objfile_backlink; | |
10646 | ||
10647 | return objfile; | |
10648 | } | |
10649 | ||
10650 | /* Return the address size given in the compilation unit header for CU. */ | |
10651 | ||
10652 | CORE_ADDR | |
10653 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) | |
10654 | { | |
10655 | if (per_cu->cu) | |
10656 | return per_cu->cu->header.addr_size; | |
10657 | else | |
10658 | { | |
10659 | /* If the CU is not currently read in, we re-read its header. */ | |
10660 | struct objfile *objfile = per_cu->psymtab->objfile; | |
10661 | struct dwarf2_per_objfile *per_objfile | |
10662 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
dce234bc | 10663 | gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset; |
ae0d2f24 UW |
10664 | |
10665 | struct comp_unit_head cu_header; | |
10666 | memset (&cu_header, 0, sizeof cu_header); | |
10667 | read_comp_unit_head (&cu_header, info_ptr, objfile->obfd); | |
10668 | return cu_header.addr_size; | |
10669 | } | |
10670 | } | |
10671 | ||
ae038cb0 | 10672 | /* Locate the compilation unit from CU's objfile which contains the |
10b3939b | 10673 | DIE at OFFSET. Raises an error on failure. */ |
ae038cb0 DJ |
10674 | |
10675 | static struct dwarf2_per_cu_data * | |
c764a876 | 10676 | dwarf2_find_containing_comp_unit (unsigned int offset, |
ae038cb0 DJ |
10677 | struct objfile *objfile) |
10678 | { | |
10679 | struct dwarf2_per_cu_data *this_cu; | |
10680 | int low, high; | |
10681 | ||
ae038cb0 DJ |
10682 | low = 0; |
10683 | high = dwarf2_per_objfile->n_comp_units - 1; | |
10684 | while (high > low) | |
10685 | { | |
10686 | int mid = low + (high - low) / 2; | |
10687 | if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset) | |
10688 | high = mid; | |
10689 | else | |
10690 | low = mid + 1; | |
10691 | } | |
10692 | gdb_assert (low == high); | |
10693 | if (dwarf2_per_objfile->all_comp_units[low]->offset > offset) | |
10694 | { | |
10b3939b | 10695 | if (low == 0) |
8a3fe4f8 AC |
10696 | error (_("Dwarf Error: could not find partial DIE containing " |
10697 | "offset 0x%lx [in module %s]"), | |
10b3939b DJ |
10698 | (long) offset, bfd_get_filename (objfile->obfd)); |
10699 | ||
ae038cb0 DJ |
10700 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset); |
10701 | return dwarf2_per_objfile->all_comp_units[low-1]; | |
10702 | } | |
10703 | else | |
10704 | { | |
10705 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
10706 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
10707 | && offset >= this_cu->offset + this_cu->length) | |
c764a876 | 10708 | error (_("invalid dwarf2 offset %u"), offset); |
ae038cb0 DJ |
10709 | gdb_assert (offset < this_cu->offset + this_cu->length); |
10710 | return this_cu; | |
10711 | } | |
10712 | } | |
10713 | ||
10b3939b DJ |
10714 | /* Locate the compilation unit from OBJFILE which is located at exactly |
10715 | OFFSET. Raises an error on failure. */ | |
10716 | ||
ae038cb0 | 10717 | static struct dwarf2_per_cu_data * |
c764a876 | 10718 | dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile) |
ae038cb0 DJ |
10719 | { |
10720 | struct dwarf2_per_cu_data *this_cu; | |
10721 | this_cu = dwarf2_find_containing_comp_unit (offset, objfile); | |
10722 | if (this_cu->offset != offset) | |
c764a876 | 10723 | error (_("no compilation unit with offset %u."), offset); |
ae038cb0 DJ |
10724 | return this_cu; |
10725 | } | |
10726 | ||
10727 | /* Release one cached compilation unit, CU. We unlink it from the tree | |
10728 | of compilation units, but we don't remove it from the read_in_chain; | |
10729 | the caller is responsible for that. */ | |
10730 | ||
10731 | static void | |
10732 | free_one_comp_unit (void *data) | |
10733 | { | |
10734 | struct dwarf2_cu *cu = data; | |
10735 | ||
10736 | if (cu->per_cu != NULL) | |
10737 | cu->per_cu->cu = NULL; | |
10738 | cu->per_cu = NULL; | |
10739 | ||
10740 | obstack_free (&cu->comp_unit_obstack, NULL); | |
10741 | ||
10742 | xfree (cu); | |
10743 | } | |
10744 | ||
72bf9492 | 10745 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 DJ |
10746 | when we're finished with it. We can't free the pointer itself, but be |
10747 | sure to unlink it from the cache. Also release any associated storage | |
10748 | and perform cache maintenance. | |
72bf9492 DJ |
10749 | |
10750 | Only used during partial symbol parsing. */ | |
10751 | ||
10752 | static void | |
10753 | free_stack_comp_unit (void *data) | |
10754 | { | |
10755 | struct dwarf2_cu *cu = data; | |
10756 | ||
10757 | obstack_free (&cu->comp_unit_obstack, NULL); | |
10758 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
10759 | |
10760 | if (cu->per_cu != NULL) | |
10761 | { | |
10762 | /* This compilation unit is on the stack in our caller, so we | |
10763 | should not xfree it. Just unlink it. */ | |
10764 | cu->per_cu->cu = NULL; | |
10765 | cu->per_cu = NULL; | |
10766 | ||
10767 | /* If we had a per-cu pointer, then we may have other compilation | |
10768 | units loaded, so age them now. */ | |
10769 | age_cached_comp_units (); | |
10770 | } | |
10771 | } | |
10772 | ||
10773 | /* Free all cached compilation units. */ | |
10774 | ||
10775 | static void | |
10776 | free_cached_comp_units (void *data) | |
10777 | { | |
10778 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10779 | ||
10780 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10781 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10782 | while (per_cu != NULL) | |
10783 | { | |
10784 | struct dwarf2_per_cu_data *next_cu; | |
10785 | ||
10786 | next_cu = per_cu->cu->read_in_chain; | |
10787 | ||
10788 | free_one_comp_unit (per_cu->cu); | |
10789 | *last_chain = next_cu; | |
10790 | ||
10791 | per_cu = next_cu; | |
10792 | } | |
10793 | } | |
10794 | ||
10795 | /* Increase the age counter on each cached compilation unit, and free | |
10796 | any that are too old. */ | |
10797 | ||
10798 | static void | |
10799 | age_cached_comp_units (void) | |
10800 | { | |
10801 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10802 | ||
10803 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
10804 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10805 | while (per_cu != NULL) | |
10806 | { | |
10807 | per_cu->cu->last_used ++; | |
10808 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
10809 | dwarf2_mark (per_cu->cu); | |
10810 | per_cu = per_cu->cu->read_in_chain; | |
10811 | } | |
10812 | ||
10813 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10814 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10815 | while (per_cu != NULL) | |
10816 | { | |
10817 | struct dwarf2_per_cu_data *next_cu; | |
10818 | ||
10819 | next_cu = per_cu->cu->read_in_chain; | |
10820 | ||
10821 | if (!per_cu->cu->mark) | |
10822 | { | |
10823 | free_one_comp_unit (per_cu->cu); | |
10824 | *last_chain = next_cu; | |
10825 | } | |
10826 | else | |
10827 | last_chain = &per_cu->cu->read_in_chain; | |
10828 | ||
10829 | per_cu = next_cu; | |
10830 | } | |
10831 | } | |
10832 | ||
10833 | /* Remove a single compilation unit from the cache. */ | |
10834 | ||
10835 | static void | |
10836 | free_one_cached_comp_unit (void *target_cu) | |
10837 | { | |
10838 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10839 | ||
10840 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10841 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10842 | while (per_cu != NULL) | |
10843 | { | |
10844 | struct dwarf2_per_cu_data *next_cu; | |
10845 | ||
10846 | next_cu = per_cu->cu->read_in_chain; | |
10847 | ||
10848 | if (per_cu->cu == target_cu) | |
10849 | { | |
10850 | free_one_comp_unit (per_cu->cu); | |
10851 | *last_chain = next_cu; | |
10852 | break; | |
10853 | } | |
10854 | else | |
10855 | last_chain = &per_cu->cu->read_in_chain; | |
10856 | ||
10857 | per_cu = next_cu; | |
10858 | } | |
10859 | } | |
10860 | ||
fe3e1990 DJ |
10861 | /* Release all extra memory associated with OBJFILE. */ |
10862 | ||
10863 | void | |
10864 | dwarf2_free_objfile (struct objfile *objfile) | |
10865 | { | |
10866 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10867 | ||
10868 | if (dwarf2_per_objfile == NULL) | |
10869 | return; | |
10870 | ||
10871 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
10872 | free_cached_comp_units (NULL); | |
10873 | ||
10874 | /* Everything else should be on the objfile obstack. */ | |
10875 | } | |
10876 | ||
1c379e20 DJ |
10877 | /* A pair of DIE offset and GDB type pointer. We store these |
10878 | in a hash table separate from the DIEs, and preserve them | |
10879 | when the DIEs are flushed out of cache. */ | |
10880 | ||
10881 | struct dwarf2_offset_and_type | |
10882 | { | |
10883 | unsigned int offset; | |
10884 | struct type *type; | |
10885 | }; | |
10886 | ||
10887 | /* Hash function for a dwarf2_offset_and_type. */ | |
10888 | ||
10889 | static hashval_t | |
10890 | offset_and_type_hash (const void *item) | |
10891 | { | |
10892 | const struct dwarf2_offset_and_type *ofs = item; | |
10893 | return ofs->offset; | |
10894 | } | |
10895 | ||
10896 | /* Equality function for a dwarf2_offset_and_type. */ | |
10897 | ||
10898 | static int | |
10899 | offset_and_type_eq (const void *item_lhs, const void *item_rhs) | |
10900 | { | |
10901 | const struct dwarf2_offset_and_type *ofs_lhs = item_lhs; | |
10902 | const struct dwarf2_offset_and_type *ofs_rhs = item_rhs; | |
10903 | return ofs_lhs->offset == ofs_rhs->offset; | |
10904 | } | |
10905 | ||
10906 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
f792889a | 10907 | table if necessary. For convenience, return TYPE. */ |
1c379e20 | 10908 | |
f792889a | 10909 | static struct type * |
1c379e20 DJ |
10910 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
10911 | { | |
10912 | struct dwarf2_offset_and_type **slot, ofs; | |
10913 | ||
f792889a DJ |
10914 | if (cu->type_hash == NULL) |
10915 | { | |
10916 | gdb_assert (cu->per_cu != NULL); | |
10917 | cu->per_cu->type_hash | |
10918 | = htab_create_alloc_ex (cu->header.length / 24, | |
10919 | offset_and_type_hash, | |
10920 | offset_and_type_eq, | |
10921 | NULL, | |
10922 | &cu->objfile->objfile_obstack, | |
10923 | hashtab_obstack_allocate, | |
10924 | dummy_obstack_deallocate); | |
10925 | cu->type_hash = cu->per_cu->type_hash; | |
10926 | } | |
1c379e20 DJ |
10927 | |
10928 | ofs.offset = die->offset; | |
10929 | ofs.type = type; | |
10930 | slot = (struct dwarf2_offset_and_type **) | |
f792889a | 10931 | htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT); |
1c379e20 DJ |
10932 | *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot)); |
10933 | **slot = ofs; | |
f792889a | 10934 | return type; |
1c379e20 DJ |
10935 | } |
10936 | ||
f792889a DJ |
10937 | /* Find the type for DIE in CU's type_hash, or return NULL if DIE does |
10938 | not have a saved type. */ | |
1c379e20 DJ |
10939 | |
10940 | static struct type * | |
f792889a | 10941 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) |
1c379e20 DJ |
10942 | { |
10943 | struct dwarf2_offset_and_type *slot, ofs; | |
f792889a DJ |
10944 | htab_t type_hash = cu->type_hash; |
10945 | ||
10946 | if (type_hash == NULL) | |
10947 | return NULL; | |
1c379e20 DJ |
10948 | |
10949 | ofs.offset = die->offset; | |
10950 | slot = htab_find_with_hash (type_hash, &ofs, ofs.offset); | |
10951 | if (slot) | |
10952 | return slot->type; | |
10953 | else | |
10954 | return NULL; | |
10955 | } | |
10956 | ||
10b3939b DJ |
10957 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
10958 | ||
10959 | static void | |
10960 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
10961 | struct dwarf2_per_cu_data *ref_per_cu) | |
10962 | { | |
10963 | void **slot; | |
10964 | ||
10965 | if (cu->dependencies == NULL) | |
10966 | cu->dependencies | |
10967 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
10968 | NULL, &cu->comp_unit_obstack, | |
10969 | hashtab_obstack_allocate, | |
10970 | dummy_obstack_deallocate); | |
10971 | ||
10972 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
10973 | if (*slot == NULL) | |
10974 | *slot = ref_per_cu; | |
10975 | } | |
1c379e20 | 10976 | |
f504f079 DE |
10977 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
10978 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
10979 | cache that we must keep because we are keeping CU. */ |
10980 | ||
10b3939b DJ |
10981 | static int |
10982 | dwarf2_mark_helper (void **slot, void *data) | |
10983 | { | |
10984 | struct dwarf2_per_cu_data *per_cu; | |
10985 | ||
10986 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
10987 | if (per_cu->cu->mark) | |
10988 | return 1; | |
10989 | per_cu->cu->mark = 1; | |
10990 | ||
10991 | if (per_cu->cu->dependencies != NULL) | |
10992 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
10993 | ||
10994 | return 1; | |
10995 | } | |
10996 | ||
f504f079 DE |
10997 | /* Set the mark field in CU and in every other compilation unit in the |
10998 | cache that we must keep because we are keeping CU. */ | |
10999 | ||
ae038cb0 DJ |
11000 | static void |
11001 | dwarf2_mark (struct dwarf2_cu *cu) | |
11002 | { | |
11003 | if (cu->mark) | |
11004 | return; | |
11005 | cu->mark = 1; | |
10b3939b DJ |
11006 | if (cu->dependencies != NULL) |
11007 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
11008 | } |
11009 | ||
11010 | static void | |
11011 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
11012 | { | |
11013 | while (per_cu) | |
11014 | { | |
11015 | per_cu->cu->mark = 0; | |
11016 | per_cu = per_cu->cu->read_in_chain; | |
11017 | } | |
72bf9492 DJ |
11018 | } |
11019 | ||
72bf9492 DJ |
11020 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
11021 | is its offset in .debug_info for this objfile. */ | |
11022 | ||
11023 | static hashval_t | |
11024 | partial_die_hash (const void *item) | |
11025 | { | |
11026 | const struct partial_die_info *part_die = item; | |
11027 | return part_die->offset; | |
11028 | } | |
11029 | ||
11030 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
11031 | are equal if they have the same offset. */ | |
11032 | ||
11033 | static int | |
11034 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
11035 | { | |
11036 | const struct partial_die_info *part_die_lhs = item_lhs; | |
11037 | const struct partial_die_info *part_die_rhs = item_rhs; | |
11038 | return part_die_lhs->offset == part_die_rhs->offset; | |
11039 | } | |
11040 | ||
ae038cb0 DJ |
11041 | static struct cmd_list_element *set_dwarf2_cmdlist; |
11042 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
11043 | ||
11044 | static void | |
11045 | set_dwarf2_cmd (char *args, int from_tty) | |
11046 | { | |
11047 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
11048 | } | |
11049 | ||
11050 | static void | |
11051 | show_dwarf2_cmd (char *args, int from_tty) | |
11052 | { | |
11053 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); | |
11054 | } | |
11055 | ||
dce234bc PP |
11056 | /* If section described by INFO was mmapped, munmap it now. */ |
11057 | ||
11058 | static void | |
11059 | munmap_section_buffer (struct dwarf2_section_info *info) | |
11060 | { | |
11061 | if (info->was_mmapped) | |
11062 | { | |
11063 | #ifdef HAVE_MMAP | |
11064 | intptr_t begin = (intptr_t) info->buffer; | |
11065 | intptr_t map_begin = begin & ~(pagesize - 1); | |
11066 | size_t map_length = info->size + begin - map_begin; | |
11067 | gdb_assert (munmap ((void *) map_begin, map_length) == 0); | |
11068 | #else | |
11069 | /* Without HAVE_MMAP, we should never be here to begin with. */ | |
11070 | gdb_assert (0); | |
11071 | #endif | |
11072 | } | |
11073 | } | |
11074 | ||
11075 | /* munmap debug sections for OBJFILE, if necessary. */ | |
11076 | ||
11077 | static void | |
11078 | dwarf2_per_objfile_cleanup (struct objfile *objfile, void *d) | |
11079 | { | |
11080 | struct dwarf2_per_objfile *data = d; | |
11081 | munmap_section_buffer (&data->info); | |
11082 | munmap_section_buffer (&data->abbrev); | |
11083 | munmap_section_buffer (&data->line); | |
11084 | munmap_section_buffer (&data->str); | |
11085 | munmap_section_buffer (&data->macinfo); | |
11086 | munmap_section_buffer (&data->ranges); | |
11087 | munmap_section_buffer (&data->loc); | |
11088 | munmap_section_buffer (&data->frame); | |
11089 | munmap_section_buffer (&data->eh_frame); | |
11090 | } | |
11091 | ||
6502dd73 DJ |
11092 | void _initialize_dwarf2_read (void); |
11093 | ||
11094 | void | |
11095 | _initialize_dwarf2_read (void) | |
11096 | { | |
dce234bc PP |
11097 | dwarf2_objfile_data_key |
11098 | = register_objfile_data_with_cleanup (dwarf2_per_objfile_cleanup); | |
ae038cb0 | 11099 | |
1bedd215 AC |
11100 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
11101 | Set DWARF 2 specific variables.\n\ | |
11102 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
11103 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
11104 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
11105 | ||
1bedd215 AC |
11106 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
11107 | Show DWARF 2 specific variables\n\ | |
11108 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
11109 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
11110 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
11111 | ||
11112 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
11113 | &dwarf2_max_cache_age, _("\ |
11114 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
11115 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
11116 | A higher limit means that cached compilation units will be stored\n\ | |
11117 | in memory longer, and more total memory will be used. Zero disables\n\ | |
11118 | caching, which can slow down startup."), | |
2c5b56ce | 11119 | NULL, |
920d2a44 | 11120 | show_dwarf2_max_cache_age, |
2c5b56ce | 11121 | &set_dwarf2_cmdlist, |
ae038cb0 | 11122 | &show_dwarf2_cmdlist); |
d97bc12b DE |
11123 | |
11124 | add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ | |
11125 | Set debugging of the dwarf2 DIE reader."), _("\ | |
11126 | Show debugging of the dwarf2 DIE reader."), _("\ | |
11127 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
11128 | The value is the maximum depth to print."), | |
11129 | NULL, | |
11130 | NULL, | |
11131 | &setdebuglist, &showdebuglist); | |
6502dd73 | 11132 | } |