Commit | Line | Data |
---|---|---|
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, |
9b254dd1 | 4 | 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
c906108c SS |
5 | |
6 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
7 | Inc. with support from Florida State University (under contract | |
8 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
9 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
10 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 11 | support. |
c906108c | 12 | |
c5aa993b | 13 | This file is part of GDB. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is free software; you can redistribute it and/or modify |
16 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
17 | the Free Software Foundation; either version 3 of the License, or |
18 | (at your option) any later version. | |
c906108c | 19 | |
a9762ec7 JB |
20 | This program is distributed in the hope that it will be useful, |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | GNU General Public License for more details. | |
c906108c | 24 | |
c5aa993b | 25 | You should have received a copy of the GNU General Public License |
a9762ec7 | 26 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
27 | |
28 | #include "defs.h" | |
29 | #include "bfd.h" | |
c906108c SS |
30 | #include "symtab.h" |
31 | #include "gdbtypes.h" | |
c906108c SS |
32 | #include "objfiles.h" |
33 | #include "elf/dwarf2.h" | |
34 | #include "buildsym.h" | |
35 | #include "demangle.h" | |
36 | #include "expression.h" | |
d5166ae1 | 37 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 38 | #include "macrotab.h" |
c906108c SS |
39 | #include "language.h" |
40 | #include "complaints.h" | |
357e46e7 | 41 | #include "bcache.h" |
4c2df51b DJ |
42 | #include "dwarf2expr.h" |
43 | #include "dwarf2loc.h" | |
9219021c | 44 | #include "cp-support.h" |
72bf9492 | 45 | #include "hashtab.h" |
ae038cb0 DJ |
46 | #include "command.h" |
47 | #include "gdbcmd.h" | |
ff013f42 | 48 | #include "addrmap.h" |
4c2df51b | 49 | |
c906108c SS |
50 | #include <fcntl.h> |
51 | #include "gdb_string.h" | |
4bdf3d34 | 52 | #include "gdb_assert.h" |
c906108c | 53 | #include <sys/types.h> |
233a11ab CS |
54 | #ifdef HAVE_ZLIB_H |
55 | #include <zlib.h> | |
56 | #endif | |
c906108c | 57 | |
d8151005 DJ |
58 | /* A note on memory usage for this file. |
59 | ||
60 | At the present time, this code reads the debug info sections into | |
61 | the objfile's objfile_obstack. A definite improvement for startup | |
62 | time, on platforms which do not emit relocations for debug | |
63 | sections, would be to use mmap instead. The object's complete | |
64 | debug information is loaded into memory, partly to simplify | |
65 | absolute DIE references. | |
66 | ||
67 | Whether using obstacks or mmap, the sections should remain loaded | |
68 | until the objfile is released, and pointers into the section data | |
69 | can be used for any other data associated to the objfile (symbol | |
70 | names, type names, location expressions to name a few). */ | |
71 | ||
107d2387 | 72 | #if 0 |
357e46e7 | 73 | /* .debug_info header for a compilation unit |
c906108c SS |
74 | Because of alignment constraints, this structure has padding and cannot |
75 | be mapped directly onto the beginning of the .debug_info section. */ | |
76 | typedef struct comp_unit_header | |
77 | { | |
78 | unsigned int length; /* length of the .debug_info | |
79 | contribution */ | |
80 | unsigned short version; /* version number -- 2 for DWARF | |
81 | version 2 */ | |
82 | unsigned int abbrev_offset; /* offset into .debug_abbrev section */ | |
83 | unsigned char addr_size; /* byte size of an address -- 4 */ | |
84 | } | |
85 | _COMP_UNIT_HEADER; | |
86 | #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 | |
107d2387 | 87 | #endif |
c906108c SS |
88 | |
89 | /* .debug_pubnames header | |
90 | Because of alignment constraints, this structure has padding and cannot | |
91 | be mapped directly onto the beginning of the .debug_info section. */ | |
92 | typedef struct pubnames_header | |
93 | { | |
94 | unsigned int length; /* length of the .debug_pubnames | |
95 | contribution */ | |
96 | unsigned char version; /* version number -- 2 for DWARF | |
97 | version 2 */ | |
98 | unsigned int info_offset; /* offset into .debug_info section */ | |
99 | unsigned int info_size; /* byte size of .debug_info section | |
100 | portion */ | |
101 | } | |
102 | _PUBNAMES_HEADER; | |
103 | #define _ACTUAL_PUBNAMES_HEADER_SIZE 13 | |
104 | ||
105 | /* .debug_pubnames header | |
106 | Because of alignment constraints, this structure has padding and cannot | |
107 | be mapped directly onto the beginning of the .debug_info section. */ | |
108 | typedef struct aranges_header | |
109 | { | |
110 | unsigned int length; /* byte len of the .debug_aranges | |
111 | contribution */ | |
112 | unsigned short version; /* version number -- 2 for DWARF | |
113 | version 2 */ | |
114 | unsigned int info_offset; /* offset into .debug_info section */ | |
115 | unsigned char addr_size; /* byte size of an address */ | |
116 | unsigned char seg_size; /* byte size of segment descriptor */ | |
117 | } | |
118 | _ARANGES_HEADER; | |
119 | #define _ACTUAL_ARANGES_HEADER_SIZE 12 | |
120 | ||
121 | /* .debug_line statement program prologue | |
122 | Because of alignment constraints, this structure has padding and cannot | |
123 | be mapped directly onto the beginning of the .debug_info section. */ | |
124 | typedef struct statement_prologue | |
125 | { | |
126 | unsigned int total_length; /* byte length of the statement | |
127 | information */ | |
128 | unsigned short version; /* version number -- 2 for DWARF | |
129 | version 2 */ | |
130 | unsigned int prologue_length; /* # bytes between prologue & | |
131 | stmt program */ | |
132 | unsigned char minimum_instruction_length; /* byte size of | |
133 | smallest instr */ | |
134 | unsigned char default_is_stmt; /* initial value of is_stmt | |
135 | register */ | |
136 | char line_base; | |
137 | unsigned char line_range; | |
138 | unsigned char opcode_base; /* number assigned to first special | |
139 | opcode */ | |
140 | unsigned char *standard_opcode_lengths; | |
141 | } | |
142 | _STATEMENT_PROLOGUE; | |
143 | ||
df8a16a1 DJ |
144 | /* When set, the file that we're processing is known to have debugging |
145 | info for C++ namespaces. GCC 3.3.x did not produce this information, | |
146 | but later versions do. */ | |
147 | ||
148 | static int processing_has_namespace_info; | |
149 | ||
6502dd73 DJ |
150 | static const struct objfile_data *dwarf2_objfile_data_key; |
151 | ||
152 | struct dwarf2_per_objfile | |
153 | { | |
154 | /* Sizes of debugging sections. */ | |
155 | unsigned int info_size; | |
156 | unsigned int abbrev_size; | |
157 | unsigned int line_size; | |
158 | unsigned int pubnames_size; | |
159 | unsigned int aranges_size; | |
160 | unsigned int loc_size; | |
161 | unsigned int macinfo_size; | |
162 | unsigned int str_size; | |
163 | unsigned int ranges_size; | |
164 | unsigned int frame_size; | |
165 | unsigned int eh_frame_size; | |
166 | ||
167 | /* Loaded data from the sections. */ | |
fe1b8b76 JB |
168 | gdb_byte *info_buffer; |
169 | gdb_byte *abbrev_buffer; | |
170 | gdb_byte *line_buffer; | |
171 | gdb_byte *str_buffer; | |
172 | gdb_byte *macinfo_buffer; | |
173 | gdb_byte *ranges_buffer; | |
174 | gdb_byte *loc_buffer; | |
ae038cb0 | 175 | |
10b3939b DJ |
176 | /* A list of all the compilation units. This is used to locate |
177 | the target compilation unit of a particular reference. */ | |
ae038cb0 DJ |
178 | struct dwarf2_per_cu_data **all_comp_units; |
179 | ||
180 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
181 | int n_comp_units; | |
182 | ||
183 | /* A chain of compilation units that are currently read in, so that | |
184 | they can be freed later. */ | |
185 | struct dwarf2_per_cu_data *read_in_chain; | |
72dca2f5 FR |
186 | |
187 | /* A flag indicating wether this objfile has a section loaded at a | |
188 | VMA of 0. */ | |
189 | int has_section_at_zero; | |
6502dd73 DJ |
190 | }; |
191 | ||
192 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 193 | |
086df311 DJ |
194 | static asection *dwarf_info_section; |
195 | static asection *dwarf_abbrev_section; | |
196 | static asection *dwarf_line_section; | |
197 | static asection *dwarf_pubnames_section; | |
198 | static asection *dwarf_aranges_section; | |
199 | static asection *dwarf_loc_section; | |
200 | static asection *dwarf_macinfo_section; | |
201 | static asection *dwarf_str_section; | |
202 | static asection *dwarf_ranges_section; | |
203 | asection *dwarf_frame_section; | |
204 | asection *dwarf_eh_frame_section; | |
205 | ||
c906108c SS |
206 | /* names of the debugging sections */ |
207 | ||
233a11ab CS |
208 | /* Note that if the debugging section has been compressed, it might |
209 | have a name like .zdebug_info. */ | |
210 | ||
211 | #define INFO_SECTION "debug_info" | |
212 | #define ABBREV_SECTION "debug_abbrev" | |
213 | #define LINE_SECTION "debug_line" | |
214 | #define PUBNAMES_SECTION "debug_pubnames" | |
215 | #define ARANGES_SECTION "debug_aranges" | |
216 | #define LOC_SECTION "debug_loc" | |
217 | #define MACINFO_SECTION "debug_macinfo" | |
218 | #define STR_SECTION "debug_str" | |
219 | #define RANGES_SECTION "debug_ranges" | |
220 | #define FRAME_SECTION "debug_frame" | |
221 | #define EH_FRAME_SECTION "eh_frame" | |
c906108c SS |
222 | |
223 | /* local data types */ | |
224 | ||
57349743 JB |
225 | /* We hold several abbreviation tables in memory at the same time. */ |
226 | #ifndef ABBREV_HASH_SIZE | |
227 | #define ABBREV_HASH_SIZE 121 | |
228 | #endif | |
229 | ||
107d2387 AC |
230 | /* The data in a compilation unit header, after target2host |
231 | translation, looks like this. */ | |
c906108c | 232 | struct comp_unit_head |
a738430d MK |
233 | { |
234 | unsigned long length; | |
235 | short version; | |
a738430d MK |
236 | unsigned char addr_size; |
237 | unsigned char signed_addr_p; | |
9cbfa09e | 238 | unsigned int abbrev_offset; |
57349743 | 239 | |
a738430d MK |
240 | /* Size of file offsets; either 4 or 8. */ |
241 | unsigned int offset_size; | |
57349743 | 242 | |
a738430d MK |
243 | /* Size of the length field; either 4 or 12. */ |
244 | unsigned int initial_length_size; | |
57349743 | 245 | |
a738430d MK |
246 | /* Offset to the first byte of this compilation unit header in the |
247 | .debug_info section, for resolving relative reference dies. */ | |
248 | unsigned int offset; | |
57349743 | 249 | |
d00adf39 DE |
250 | /* Offset to first die in this cu from the start of the cu. |
251 | This will be the first byte following the compilation unit header. */ | |
252 | unsigned int first_die_offset; | |
a738430d | 253 | }; |
c906108c | 254 | |
e7c27a73 DJ |
255 | /* Internal state when decoding a particular compilation unit. */ |
256 | struct dwarf2_cu | |
257 | { | |
258 | /* The objfile containing this compilation unit. */ | |
259 | struct objfile *objfile; | |
260 | ||
d00adf39 | 261 | /* The header of the compilation unit. */ |
e7c27a73 | 262 | struct comp_unit_head header; |
e142c38c | 263 | |
d00adf39 DE |
264 | /* Base address of this compilation unit. */ |
265 | CORE_ADDR base_address; | |
266 | ||
267 | /* Non-zero if base_address has been set. */ | |
268 | int base_known; | |
269 | ||
e142c38c DJ |
270 | struct function_range *first_fn, *last_fn, *cached_fn; |
271 | ||
272 | /* The language we are debugging. */ | |
273 | enum language language; | |
274 | const struct language_defn *language_defn; | |
275 | ||
b0f35d58 DL |
276 | const char *producer; |
277 | ||
e142c38c DJ |
278 | /* The generic symbol table building routines have separate lists for |
279 | file scope symbols and all all other scopes (local scopes). So | |
280 | we need to select the right one to pass to add_symbol_to_list(). | |
281 | We do it by keeping a pointer to the correct list in list_in_scope. | |
282 | ||
283 | FIXME: The original dwarf code just treated the file scope as the | |
284 | first local scope, and all other local scopes as nested local | |
285 | scopes, and worked fine. Check to see if we really need to | |
286 | distinguish these in buildsym.c. */ | |
287 | struct pending **list_in_scope; | |
288 | ||
f3dd6933 DJ |
289 | /* DWARF abbreviation table associated with this compilation unit. */ |
290 | struct abbrev_info **dwarf2_abbrevs; | |
291 | ||
292 | /* Storage for the abbrev table. */ | |
293 | struct obstack abbrev_obstack; | |
72bf9492 DJ |
294 | |
295 | /* Hash table holding all the loaded partial DIEs. */ | |
296 | htab_t partial_dies; | |
297 | ||
ff013f42 JK |
298 | /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */ |
299 | unsigned long ranges_offset; | |
300 | ||
72bf9492 DJ |
301 | /* Storage for things with the same lifetime as this read-in compilation |
302 | unit, including partial DIEs. */ | |
303 | struct obstack comp_unit_obstack; | |
304 | ||
ae038cb0 DJ |
305 | /* When multiple dwarf2_cu structures are living in memory, this field |
306 | chains them all together, so that they can be released efficiently. | |
307 | We will probably also want a generation counter so that most-recently-used | |
308 | compilation units are cached... */ | |
309 | struct dwarf2_per_cu_data *read_in_chain; | |
310 | ||
311 | /* Backchain to our per_cu entry if the tree has been built. */ | |
312 | struct dwarf2_per_cu_data *per_cu; | |
313 | ||
f792889a DJ |
314 | /* Pointer to the die -> type map. Although it is stored |
315 | permanently in per_cu, we copy it here to avoid double | |
316 | indirection. */ | |
317 | htab_t type_hash; | |
318 | ||
ae038cb0 DJ |
319 | /* How many compilation units ago was this CU last referenced? */ |
320 | int last_used; | |
321 | ||
10b3939b | 322 | /* A hash table of die offsets for following references. */ |
51545339 | 323 | htab_t die_hash; |
10b3939b DJ |
324 | |
325 | /* Full DIEs if read in. */ | |
326 | struct die_info *dies; | |
327 | ||
328 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
329 | units referenced by this one. Only set during full symbol processing; | |
330 | partial symbol tables do not have dependencies. */ | |
331 | htab_t dependencies; | |
332 | ||
cb1df416 DJ |
333 | /* Header data from the line table, during full symbol processing. */ |
334 | struct line_header *line_header; | |
335 | ||
ae038cb0 DJ |
336 | /* Mark used when releasing cached dies. */ |
337 | unsigned int mark : 1; | |
338 | ||
339 | /* This flag will be set if this compilation unit might include | |
340 | inter-compilation-unit references. */ | |
341 | unsigned int has_form_ref_addr : 1; | |
342 | ||
72bf9492 DJ |
343 | /* This flag will be set if this compilation unit includes any |
344 | DW_TAG_namespace DIEs. If we know that there are explicit | |
345 | DIEs for namespaces, we don't need to try to infer them | |
346 | from mangled names. */ | |
347 | unsigned int has_namespace_info : 1; | |
ff013f42 JK |
348 | |
349 | /* Field `ranges_offset' is filled in; flag as the value may be zero. */ | |
350 | unsigned int has_ranges_offset : 1; | |
e7c27a73 DJ |
351 | }; |
352 | ||
10b3939b DJ |
353 | /* Persistent data held for a compilation unit, even when not |
354 | processing it. We put a pointer to this structure in the | |
355 | read_symtab_private field of the psymtab. If we encounter | |
356 | inter-compilation-unit references, we also maintain a sorted | |
357 | list of all compilation units. */ | |
358 | ||
ae038cb0 DJ |
359 | struct dwarf2_per_cu_data |
360 | { | |
5afb4e99 | 361 | /* The start offset and length of this compilation unit. 2**30-1 |
ae038cb0 DJ |
362 | bytes should suffice to store the length of any compilation unit |
363 | - if it doesn't, GDB will fall over anyway. */ | |
364 | unsigned long offset; | |
5afb4e99 | 365 | unsigned long length : 30; |
ae038cb0 DJ |
366 | |
367 | /* Flag indicating this compilation unit will be read in before | |
368 | any of the current compilation units are processed. */ | |
369 | unsigned long queued : 1; | |
370 | ||
5afb4e99 DJ |
371 | /* This flag will be set if we need to load absolutely all DIEs |
372 | for this compilation unit, instead of just the ones we think | |
373 | are interesting. It gets set if we look for a DIE in the | |
374 | hash table and don't find it. */ | |
375 | unsigned int load_all_dies : 1; | |
376 | ||
ae038cb0 DJ |
377 | /* Set iff currently read in. */ |
378 | struct dwarf2_cu *cu; | |
1c379e20 DJ |
379 | |
380 | /* If full symbols for this CU have been read in, then this field | |
381 | holds a map of DIE offsets to types. It isn't always possible | |
382 | to reconstruct this information later, so we have to preserve | |
383 | it. */ | |
1c379e20 | 384 | htab_t type_hash; |
10b3939b | 385 | |
31ffec48 DJ |
386 | /* The partial symbol table associated with this compilation unit, |
387 | or NULL for partial units (which do not have an associated | |
388 | symtab). */ | |
10b3939b | 389 | struct partial_symtab *psymtab; |
ae038cb0 DJ |
390 | }; |
391 | ||
debd256d JB |
392 | /* The line number information for a compilation unit (found in the |
393 | .debug_line section) begins with a "statement program header", | |
394 | which contains the following information. */ | |
395 | struct line_header | |
396 | { | |
397 | unsigned int total_length; | |
398 | unsigned short version; | |
399 | unsigned int header_length; | |
400 | unsigned char minimum_instruction_length; | |
401 | unsigned char default_is_stmt; | |
402 | int line_base; | |
403 | unsigned char line_range; | |
404 | unsigned char opcode_base; | |
405 | ||
406 | /* standard_opcode_lengths[i] is the number of operands for the | |
407 | standard opcode whose value is i. This means that | |
408 | standard_opcode_lengths[0] is unused, and the last meaningful | |
409 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
410 | unsigned char *standard_opcode_lengths; | |
411 | ||
412 | /* The include_directories table. NOTE! These strings are not | |
413 | allocated with xmalloc; instead, they are pointers into | |
414 | debug_line_buffer. If you try to free them, `free' will get | |
415 | indigestion. */ | |
416 | unsigned int num_include_dirs, include_dirs_size; | |
417 | char **include_dirs; | |
418 | ||
419 | /* The file_names table. NOTE! These strings are not allocated | |
420 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
421 | Don't try to free them directly. */ | |
422 | unsigned int num_file_names, file_names_size; | |
423 | struct file_entry | |
c906108c | 424 | { |
debd256d JB |
425 | char *name; |
426 | unsigned int dir_index; | |
427 | unsigned int mod_time; | |
428 | unsigned int length; | |
aaa75496 | 429 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 430 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
431 | } *file_names; |
432 | ||
433 | /* The start and end of the statement program following this | |
6502dd73 | 434 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fe1b8b76 | 435 | gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 436 | }; |
c906108c SS |
437 | |
438 | /* When we construct a partial symbol table entry we only | |
439 | need this much information. */ | |
440 | struct partial_die_info | |
441 | { | |
72bf9492 | 442 | /* Offset of this DIE. */ |
c906108c | 443 | unsigned int offset; |
72bf9492 DJ |
444 | |
445 | /* DWARF-2 tag for this DIE. */ | |
446 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
447 | ||
448 | /* Language code associated with this DIE. This is only used | |
449 | for the compilation unit DIE. */ | |
450 | unsigned int language : 8; | |
451 | ||
452 | /* Assorted flags describing the data found in this DIE. */ | |
453 | unsigned int has_children : 1; | |
454 | unsigned int is_external : 1; | |
455 | unsigned int is_declaration : 1; | |
456 | unsigned int has_type : 1; | |
457 | unsigned int has_specification : 1; | |
aaa75496 | 458 | unsigned int has_stmt_list : 1; |
72bf9492 DJ |
459 | unsigned int has_pc_info : 1; |
460 | ||
461 | /* Flag set if the SCOPE field of this structure has been | |
462 | computed. */ | |
463 | unsigned int scope_set : 1; | |
464 | ||
fa4028e9 JB |
465 | /* Flag set if the DIE has a byte_size attribute. */ |
466 | unsigned int has_byte_size : 1; | |
467 | ||
72bf9492 DJ |
468 | /* The name of this DIE. Normally the value of DW_AT_name, but |
469 | sometimes DW_TAG_MIPS_linkage_name or a string computed in some | |
470 | other fashion. */ | |
c906108c | 471 | char *name; |
57c22c6c | 472 | char *dirname; |
72bf9492 DJ |
473 | |
474 | /* The scope to prepend to our children. This is generally | |
475 | allocated on the comp_unit_obstack, so will disappear | |
476 | when this compilation unit leaves the cache. */ | |
477 | char *scope; | |
478 | ||
479 | /* The location description associated with this DIE, if any. */ | |
480 | struct dwarf_block *locdesc; | |
481 | ||
482 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
483 | CORE_ADDR lowpc; |
484 | CORE_ADDR highpc; | |
72bf9492 DJ |
485 | |
486 | /* Pointer into the info_buffer pointing at the target of | |
487 | DW_AT_sibling, if any. */ | |
fe1b8b76 | 488 | gdb_byte *sibling; |
72bf9492 DJ |
489 | |
490 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
491 | DW_AT_specification (or DW_AT_abstract_origin or | |
492 | DW_AT_extension). */ | |
493 | unsigned int spec_offset; | |
494 | ||
aaa75496 JB |
495 | /* If HAS_STMT_LIST, the offset of the Line Number Information data. */ |
496 | unsigned int line_offset; | |
497 | ||
72bf9492 DJ |
498 | /* Pointers to this DIE's parent, first child, and next sibling, |
499 | if any. */ | |
500 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
501 | }; |
502 | ||
503 | /* This data structure holds the information of an abbrev. */ | |
504 | struct abbrev_info | |
505 | { | |
506 | unsigned int number; /* number identifying abbrev */ | |
507 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
508 | unsigned short has_children; /* boolean */ |
509 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
510 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
511 | struct abbrev_info *next; /* next in chain */ | |
512 | }; | |
513 | ||
514 | struct attr_abbrev | |
515 | { | |
9d25dd43 DE |
516 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
517 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
518 | }; |
519 | ||
b60c80d6 DJ |
520 | /* Attributes have a name and a value */ |
521 | struct attribute | |
522 | { | |
9d25dd43 DE |
523 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
524 | ENUM_BITFIELD(dwarf_form) form : 16; | |
b60c80d6 DJ |
525 | union |
526 | { | |
527 | char *str; | |
528 | struct dwarf_block *blk; | |
529 | unsigned long unsnd; | |
530 | long int snd; | |
531 | CORE_ADDR addr; | |
532 | } | |
533 | u; | |
534 | }; | |
535 | ||
c906108c SS |
536 | /* This data structure holds a complete die structure. */ |
537 | struct die_info | |
538 | { | |
76815b17 DE |
539 | /* DWARF-2 tag for this DIE. */ |
540 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
541 | ||
542 | /* Number of attributes */ | |
543 | unsigned short num_attrs; | |
544 | ||
545 | /* Abbrev number */ | |
546 | unsigned int abbrev; | |
547 | ||
548 | /* Offset in .debug_info section */ | |
549 | unsigned int offset; | |
78ba4af6 JB |
550 | |
551 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
552 | points to this die's parent; CHILD points to the first child of | |
553 | this node; and all the children of a given node are chained | |
554 | together via their SIBLING fields, terminated by a die whose | |
555 | tag is zero. */ | |
639d11d3 DC |
556 | struct die_info *child; /* Its first child, if any. */ |
557 | struct die_info *sibling; /* Its next sibling, if any. */ | |
558 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 559 | |
b60c80d6 DJ |
560 | /* An array of attributes, with NUM_ATTRS elements. There may be |
561 | zero, but it's not common and zero-sized arrays are not | |
562 | sufficiently portable C. */ | |
563 | struct attribute attrs[1]; | |
c906108c SS |
564 | }; |
565 | ||
5fb290d7 DJ |
566 | struct function_range |
567 | { | |
568 | const char *name; | |
569 | CORE_ADDR lowpc, highpc; | |
570 | int seen_line; | |
571 | struct function_range *next; | |
572 | }; | |
573 | ||
c906108c SS |
574 | /* Get at parts of an attribute structure */ |
575 | ||
576 | #define DW_STRING(attr) ((attr)->u.str) | |
577 | #define DW_UNSND(attr) ((attr)->u.unsnd) | |
578 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
579 | #define DW_SND(attr) ((attr)->u.snd) | |
580 | #define DW_ADDR(attr) ((attr)->u.addr) | |
581 | ||
582 | /* Blocks are a bunch of untyped bytes. */ | |
583 | struct dwarf_block | |
584 | { | |
585 | unsigned int size; | |
fe1b8b76 | 586 | gdb_byte *data; |
c906108c SS |
587 | }; |
588 | ||
c906108c SS |
589 | #ifndef ATTR_ALLOC_CHUNK |
590 | #define ATTR_ALLOC_CHUNK 4 | |
591 | #endif | |
592 | ||
c906108c SS |
593 | /* Allocate fields for structs, unions and enums in this size. */ |
594 | #ifndef DW_FIELD_ALLOC_CHUNK | |
595 | #define DW_FIELD_ALLOC_CHUNK 4 | |
596 | #endif | |
597 | ||
c906108c SS |
598 | /* A zeroed version of a partial die for initialization purposes. */ |
599 | static struct partial_die_info zeroed_partial_die; | |
600 | ||
c906108c SS |
601 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
602 | but this would require a corresponding change in unpack_field_as_long | |
603 | and friends. */ | |
604 | static int bits_per_byte = 8; | |
605 | ||
606 | /* The routines that read and process dies for a C struct or C++ class | |
607 | pass lists of data member fields and lists of member function fields | |
608 | in an instance of a field_info structure, as defined below. */ | |
609 | struct field_info | |
c5aa993b JM |
610 | { |
611 | /* List of data member and baseclasses fields. */ | |
612 | struct nextfield | |
613 | { | |
614 | struct nextfield *next; | |
615 | int accessibility; | |
616 | int virtuality; | |
617 | struct field field; | |
618 | } | |
619 | *fields; | |
c906108c | 620 | |
c5aa993b JM |
621 | /* Number of fields. */ |
622 | int nfields; | |
c906108c | 623 | |
c5aa993b JM |
624 | /* Number of baseclasses. */ |
625 | int nbaseclasses; | |
c906108c | 626 | |
c5aa993b JM |
627 | /* Set if the accesibility of one of the fields is not public. */ |
628 | int non_public_fields; | |
c906108c | 629 | |
c5aa993b JM |
630 | /* Member function fields array, entries are allocated in the order they |
631 | are encountered in the object file. */ | |
632 | struct nextfnfield | |
633 | { | |
634 | struct nextfnfield *next; | |
635 | struct fn_field fnfield; | |
636 | } | |
637 | *fnfields; | |
c906108c | 638 | |
c5aa993b JM |
639 | /* Member function fieldlist array, contains name of possibly overloaded |
640 | member function, number of overloaded member functions and a pointer | |
641 | to the head of the member function field chain. */ | |
642 | struct fnfieldlist | |
643 | { | |
644 | char *name; | |
645 | int length; | |
646 | struct nextfnfield *head; | |
647 | } | |
648 | *fnfieldlists; | |
c906108c | 649 | |
c5aa993b JM |
650 | /* Number of entries in the fnfieldlists array. */ |
651 | int nfnfields; | |
652 | }; | |
c906108c | 653 | |
10b3939b DJ |
654 | /* One item on the queue of compilation units to read in full symbols |
655 | for. */ | |
656 | struct dwarf2_queue_item | |
657 | { | |
658 | struct dwarf2_per_cu_data *per_cu; | |
659 | struct dwarf2_queue_item *next; | |
660 | }; | |
661 | ||
662 | /* The current queue. */ | |
663 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
664 | ||
ae038cb0 DJ |
665 | /* Loaded secondary compilation units are kept in memory until they |
666 | have not been referenced for the processing of this many | |
667 | compilation units. Set this to zero to disable caching. Cache | |
668 | sizes of up to at least twenty will improve startup time for | |
669 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
670 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
671 | static void |
672 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
673 | struct cmd_list_element *c, const char *value) | |
674 | { | |
675 | fprintf_filtered (file, _("\ | |
676 | The upper bound on the age of cached dwarf2 compilation units is %s.\n"), | |
677 | value); | |
678 | } | |
679 | ||
ae038cb0 | 680 | |
c906108c SS |
681 | /* Various complaints about symbol reading that don't abort the process */ |
682 | ||
4d3c2250 KB |
683 | static void |
684 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 685 | { |
4d3c2250 | 686 | complaint (&symfile_complaints, |
e2e0b3e5 | 687 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
688 | } |
689 | ||
25e43795 DJ |
690 | static void |
691 | dwarf2_debug_line_missing_file_complaint (void) | |
692 | { | |
693 | complaint (&symfile_complaints, | |
694 | _(".debug_line section has line data without a file")); | |
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 *, | |
753 | 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, | |
762 | struct dwarf2_cu *cu); | |
63d06c5c | 763 | |
72bf9492 DJ |
764 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
765 | struct dwarf2_cu *cu); | |
91c24f0a | 766 | |
bc30ff58 JB |
767 | static void add_partial_subprogram (struct partial_die_info *pdi, |
768 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
769 | struct dwarf2_cu *cu); | |
770 | ||
fe1b8b76 JB |
771 | static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi, |
772 | gdb_byte *info_ptr, | |
773 | bfd *abfd, | |
774 | struct dwarf2_cu *cu); | |
91c24f0a | 775 | |
a14ed312 | 776 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 777 | |
a14ed312 | 778 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 779 | |
fe1b8b76 | 780 | gdb_byte *dwarf2_read_section (struct objfile *, asection *); |
c906108c | 781 | |
e7c27a73 | 782 | static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu); |
c906108c | 783 | |
f3dd6933 | 784 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 785 | |
fe1b8b76 | 786 | static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *, |
891d2f0b | 787 | struct dwarf2_cu *); |
72bf9492 | 788 | |
57349743 | 789 | static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int, |
e7c27a73 | 790 | struct dwarf2_cu *); |
c906108c | 791 | |
fe1b8b76 | 792 | static struct partial_die_info *load_partial_dies (bfd *, gdb_byte *, int, |
72bf9492 DJ |
793 | struct dwarf2_cu *); |
794 | ||
fe1b8b76 JB |
795 | static gdb_byte *read_partial_die (struct partial_die_info *, |
796 | struct abbrev_info *abbrev, unsigned int, | |
797 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
c906108c | 798 | |
72bf9492 | 799 | static struct partial_die_info *find_partial_die (unsigned long, |
10b3939b | 800 | struct dwarf2_cu *); |
72bf9492 DJ |
801 | |
802 | static void fixup_partial_die (struct partial_die_info *, | |
803 | struct dwarf2_cu *); | |
804 | ||
fe1b8b76 JB |
805 | static gdb_byte *read_full_die (struct die_info **, bfd *, gdb_byte *, |
806 | struct dwarf2_cu *, int *); | |
c906108c | 807 | |
fe1b8b76 JB |
808 | static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *, |
809 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
c906108c | 810 | |
fe1b8b76 JB |
811 | static gdb_byte *read_attribute_value (struct attribute *, unsigned, |
812 | bfd *, gdb_byte *, struct dwarf2_cu *); | |
a8329558 | 813 | |
fe1b8b76 | 814 | static unsigned int read_1_byte (bfd *, gdb_byte *); |
c906108c | 815 | |
fe1b8b76 | 816 | static int read_1_signed_byte (bfd *, gdb_byte *); |
c906108c | 817 | |
fe1b8b76 | 818 | static unsigned int read_2_bytes (bfd *, gdb_byte *); |
c906108c | 819 | |
fe1b8b76 | 820 | static unsigned int read_4_bytes (bfd *, gdb_byte *); |
c906108c | 821 | |
fe1b8b76 | 822 | static unsigned long read_8_bytes (bfd *, gdb_byte *); |
c906108c | 823 | |
fe1b8b76 | 824 | static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 825 | unsigned int *); |
c906108c | 826 | |
fe1b8b76 | 827 | static LONGEST read_initial_length (bfd *, gdb_byte *, |
891d2f0b | 828 | struct comp_unit_head *, unsigned int *); |
613e1657 | 829 | |
fe1b8b76 | 830 | static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *, |
891d2f0b | 831 | unsigned int *); |
613e1657 | 832 | |
fe1b8b76 | 833 | static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int); |
c906108c | 834 | |
fe1b8b76 | 835 | static char *read_string (bfd *, gdb_byte *, unsigned int *); |
c906108c | 836 | |
fe1b8b76 JB |
837 | static char *read_indirect_string (bfd *, gdb_byte *, |
838 | const struct comp_unit_head *, | |
839 | unsigned int *); | |
4bdf3d34 | 840 | |
fe1b8b76 | 841 | static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 842 | |
fe1b8b76 | 843 | static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 844 | |
fe1b8b76 | 845 | static gdb_byte *skip_leb128 (bfd *, gdb_byte *); |
4bb7a0a7 | 846 | |
e142c38c | 847 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 848 | |
e142c38c DJ |
849 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
850 | struct dwarf2_cu *); | |
c906108c | 851 | |
05cf31d1 JB |
852 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
853 | struct dwarf2_cu *cu); | |
854 | ||
e142c38c | 855 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 856 | |
e142c38c | 857 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 858 | struct dwarf2_cu **); |
63d06c5c | 859 | |
debd256d JB |
860 | static void free_line_header (struct line_header *lh); |
861 | ||
aaa75496 JB |
862 | static void add_file_name (struct line_header *, char *, unsigned int, |
863 | unsigned int, unsigned int); | |
864 | ||
debd256d JB |
865 | static struct line_header *(dwarf_decode_line_header |
866 | (unsigned int offset, | |
e7c27a73 | 867 | bfd *abfd, struct dwarf2_cu *cu)); |
debd256d JB |
868 | |
869 | static void dwarf_decode_lines (struct line_header *, char *, bfd *, | |
aaa75496 | 870 | struct dwarf2_cu *, struct partial_symtab *); |
c906108c | 871 | |
4f1520fb | 872 | static void dwarf2_start_subfile (char *, char *, char *); |
c906108c | 873 | |
a14ed312 | 874 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 875 | struct dwarf2_cu *); |
c906108c | 876 | |
a14ed312 | 877 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 878 | struct dwarf2_cu *); |
c906108c | 879 | |
2df3850c JM |
880 | static void dwarf2_const_value_data (struct attribute *attr, |
881 | struct symbol *sym, | |
882 | int bits); | |
883 | ||
e7c27a73 | 884 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 885 | |
e7c27a73 DJ |
886 | static struct type *die_containing_type (struct die_info *, |
887 | struct dwarf2_cu *); | |
c906108c | 888 | |
e7c27a73 | 889 | static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 890 | |
f792889a | 891 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 892 | |
086ed43d | 893 | static char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 894 | |
fe1b8b76 JB |
895 | static char *typename_concat (struct obstack *, |
896 | const char *prefix, | |
897 | const char *suffix, | |
987504bb | 898 | struct dwarf2_cu *); |
63d06c5c | 899 | |
e7c27a73 | 900 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 901 | |
e7c27a73 | 902 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 903 | |
e7c27a73 | 904 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 905 | |
ff013f42 JK |
906 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
907 | struct dwarf2_cu *, struct partial_symtab *); | |
908 | ||
a14ed312 | 909 | static int dwarf2_get_pc_bounds (struct die_info *, |
e7c27a73 | 910 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *); |
c906108c | 911 | |
fae299cd DC |
912 | static void get_scope_pc_bounds (struct die_info *, |
913 | CORE_ADDR *, CORE_ADDR *, | |
914 | struct dwarf2_cu *); | |
915 | ||
801e3a5b JB |
916 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
917 | CORE_ADDR, struct dwarf2_cu *); | |
918 | ||
a14ed312 | 919 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 920 | struct dwarf2_cu *); |
c906108c | 921 | |
a14ed312 | 922 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 923 | struct type *, struct dwarf2_cu *); |
c906108c | 924 | |
a14ed312 | 925 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 926 | struct die_info *, struct type *, |
e7c27a73 | 927 | struct dwarf2_cu *); |
c906108c | 928 | |
a14ed312 | 929 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
e7c27a73 | 930 | struct type *, struct dwarf2_cu *); |
c906108c | 931 | |
134d01f1 | 932 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 933 | |
0114d602 DJ |
934 | static const char *determine_class_name (struct die_info *die, |
935 | struct dwarf2_cu *cu); | |
8176b9b8 | 936 | |
e7c27a73 | 937 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 938 | |
e7c27a73 | 939 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 940 | |
38d518c9 | 941 | static const char *namespace_name (struct die_info *die, |
e142c38c | 942 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 943 | |
134d01f1 | 944 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 945 | |
e7c27a73 | 946 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 947 | |
7ca2d3a3 DL |
948 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
949 | struct dwarf2_cu *); | |
950 | ||
fe1b8b76 | 951 | static struct die_info *read_comp_unit (gdb_byte *, bfd *, struct dwarf2_cu *); |
c906108c | 952 | |
fe1b8b76 | 953 | static struct die_info *read_die_and_children (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 954 | struct dwarf2_cu *, |
fe1b8b76 | 955 | gdb_byte **new_info_ptr, |
639d11d3 DC |
956 | struct die_info *parent); |
957 | ||
fe1b8b76 | 958 | static struct die_info *read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 959 | struct dwarf2_cu *, |
fe1b8b76 | 960 | gdb_byte **new_info_ptr, |
639d11d3 DC |
961 | struct die_info *parent); |
962 | ||
e7c27a73 | 963 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 964 | |
e142c38c | 965 | static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *); |
c906108c | 966 | |
e142c38c | 967 | static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 968 | |
e142c38c | 969 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 970 | struct dwarf2_cu **); |
9219021c | 971 | |
a14ed312 | 972 | static char *dwarf_tag_name (unsigned int); |
c906108c | 973 | |
a14ed312 | 974 | static char *dwarf_attr_name (unsigned int); |
c906108c | 975 | |
a14ed312 | 976 | static char *dwarf_form_name (unsigned int); |
c906108c | 977 | |
a14ed312 | 978 | static char *dwarf_stack_op_name (unsigned int); |
c906108c | 979 | |
a14ed312 | 980 | static char *dwarf_bool_name (unsigned int); |
c906108c | 981 | |
a14ed312 | 982 | static char *dwarf_type_encoding_name (unsigned int); |
c906108c SS |
983 | |
984 | #if 0 | |
a14ed312 | 985 | static char *dwarf_cfi_name (unsigned int); |
c906108c SS |
986 | #endif |
987 | ||
f9aca02d | 988 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 989 | |
f9aca02d | 990 | static void dump_die (struct die_info *); |
c906108c | 991 | |
f9aca02d | 992 | static void dump_die_list (struct die_info *); |
c906108c | 993 | |
51545339 | 994 | static void store_in_ref_table (struct die_info *, |
10b3939b | 995 | struct dwarf2_cu *); |
c906108c | 996 | |
e142c38c DJ |
997 | static unsigned int dwarf2_get_ref_die_offset (struct attribute *, |
998 | struct dwarf2_cu *); | |
c906108c | 999 | |
a02abb62 JB |
1000 | static int dwarf2_get_attr_constant_value (struct attribute *, int); |
1001 | ||
10b3939b DJ |
1002 | static struct die_info *follow_die_ref (struct die_info *, |
1003 | struct attribute *, | |
f2f0e013 | 1004 | struct dwarf2_cu **); |
c906108c | 1005 | |
c906108c SS |
1006 | /* memory allocation interface */ |
1007 | ||
7b5a2f43 | 1008 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1009 | |
f3dd6933 | 1010 | static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *); |
c906108c | 1011 | |
b60c80d6 | 1012 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1013 | |
e142c38c | 1014 | static void initialize_cu_func_list (struct dwarf2_cu *); |
5fb290d7 | 1015 | |
e142c38c DJ |
1016 | static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR, |
1017 | struct dwarf2_cu *); | |
5fb290d7 | 1018 | |
2e276125 | 1019 | static void dwarf_decode_macros (struct line_header *, unsigned int, |
e7c27a73 | 1020 | char *, bfd *, struct dwarf2_cu *); |
2e276125 | 1021 | |
8e19ed76 PS |
1022 | static int attr_form_is_block (struct attribute *); |
1023 | ||
3690dd37 JB |
1024 | static int attr_form_is_section_offset (struct attribute *); |
1025 | ||
1026 | static int attr_form_is_constant (struct attribute *); | |
1027 | ||
93e7bd98 DJ |
1028 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1029 | struct symbol *sym, | |
1030 | struct dwarf2_cu *cu); | |
4c2df51b | 1031 | |
fe1b8b76 JB |
1032 | static gdb_byte *skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev, |
1033 | struct dwarf2_cu *cu); | |
4bb7a0a7 | 1034 | |
72bf9492 DJ |
1035 | static void free_stack_comp_unit (void *); |
1036 | ||
72bf9492 DJ |
1037 | static hashval_t partial_die_hash (const void *item); |
1038 | ||
1039 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1040 | ||
ae038cb0 DJ |
1041 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
1042 | (unsigned long offset, struct objfile *objfile); | |
1043 | ||
1044 | static struct dwarf2_per_cu_data *dwarf2_find_comp_unit | |
1045 | (unsigned long offset, struct objfile *objfile); | |
1046 | ||
1047 | static void free_one_comp_unit (void *); | |
1048 | ||
1049 | static void free_cached_comp_units (void *); | |
1050 | ||
1051 | static void age_cached_comp_units (void); | |
1052 | ||
1053 | static void free_one_cached_comp_unit (void *); | |
1054 | ||
f792889a DJ |
1055 | static struct type *set_die_type (struct die_info *, struct type *, |
1056 | struct dwarf2_cu *); | |
1c379e20 | 1057 | |
ae038cb0 DJ |
1058 | static void create_all_comp_units (struct objfile *); |
1059 | ||
31ffec48 DJ |
1060 | static struct dwarf2_cu *load_full_comp_unit (struct dwarf2_per_cu_data *, |
1061 | struct objfile *); | |
10b3939b DJ |
1062 | |
1063 | static void process_full_comp_unit (struct dwarf2_per_cu_data *); | |
1064 | ||
1065 | static void dwarf2_add_dependence (struct dwarf2_cu *, | |
1066 | struct dwarf2_per_cu_data *); | |
1067 | ||
ae038cb0 DJ |
1068 | static void dwarf2_mark (struct dwarf2_cu *); |
1069 | ||
1070 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1071 | ||
f792889a | 1072 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1073 | |
c906108c SS |
1074 | /* Try to locate the sections we need for DWARF 2 debugging |
1075 | information and return true if we have enough to do something. */ | |
1076 | ||
1077 | int | |
6502dd73 | 1078 | dwarf2_has_info (struct objfile *objfile) |
c906108c | 1079 | { |
6502dd73 DJ |
1080 | struct dwarf2_per_objfile *data; |
1081 | ||
1082 | /* Initialize per-objfile state. */ | |
1083 | data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
1084 | memset (data, 0, sizeof (*data)); | |
1085 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1086 | dwarf2_per_objfile = data; | |
1087 | ||
188dd5d6 DJ |
1088 | dwarf_info_section = 0; |
1089 | dwarf_abbrev_section = 0; | |
1090 | dwarf_line_section = 0; | |
1091 | dwarf_str_section = 0; | |
1092 | dwarf_macinfo_section = 0; | |
1093 | dwarf_frame_section = 0; | |
1094 | dwarf_eh_frame_section = 0; | |
1095 | dwarf_ranges_section = 0; | |
1096 | dwarf_loc_section = 0; | |
af34e669 | 1097 | |
6502dd73 | 1098 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL); |
188dd5d6 | 1099 | return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL); |
c906108c SS |
1100 | } |
1101 | ||
233a11ab CS |
1102 | /* When loading sections, we can either look for ".<name>", or for |
1103 | * ".z<name>", which indicates a compressed section. */ | |
1104 | ||
1105 | static int | |
1106 | section_is_p (asection *sectp, const char *name) | |
1107 | { | |
1108 | return ((sectp->name[0] == '.' | |
1109 | && strcmp (sectp->name + 1, name) == 0) | |
1110 | || (sectp->name[0] == '.' && sectp->name[1] == 'z' | |
1111 | && strcmp (sectp->name + 2, name) == 0)); | |
1112 | } | |
1113 | ||
c906108c SS |
1114 | /* This function is mapped across the sections and remembers the |
1115 | offset and size of each of the debugging sections we are interested | |
1116 | in. */ | |
1117 | ||
1118 | static void | |
72dca2f5 | 1119 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr) |
c906108c | 1120 | { |
233a11ab | 1121 | if (section_is_p (sectp, INFO_SECTION)) |
c906108c | 1122 | { |
2c500098 | 1123 | dwarf2_per_objfile->info_size = bfd_get_section_size (sectp); |
086df311 | 1124 | dwarf_info_section = sectp; |
c906108c | 1125 | } |
233a11ab | 1126 | else if (section_is_p (sectp, ABBREV_SECTION)) |
c906108c | 1127 | { |
2c500098 | 1128 | dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp); |
086df311 | 1129 | dwarf_abbrev_section = sectp; |
c906108c | 1130 | } |
233a11ab | 1131 | else if (section_is_p (sectp, LINE_SECTION)) |
c906108c | 1132 | { |
2c500098 | 1133 | dwarf2_per_objfile->line_size = bfd_get_section_size (sectp); |
086df311 | 1134 | dwarf_line_section = sectp; |
c906108c | 1135 | } |
233a11ab | 1136 | else if (section_is_p (sectp, PUBNAMES_SECTION)) |
c906108c | 1137 | { |
2c500098 | 1138 | dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp); |
086df311 | 1139 | dwarf_pubnames_section = sectp; |
c906108c | 1140 | } |
233a11ab | 1141 | else if (section_is_p (sectp, ARANGES_SECTION)) |
c906108c | 1142 | { |
2c500098 | 1143 | dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp); |
086df311 | 1144 | dwarf_aranges_section = sectp; |
c906108c | 1145 | } |
233a11ab | 1146 | else if (section_is_p (sectp, LOC_SECTION)) |
c906108c | 1147 | { |
2c500098 | 1148 | dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp); |
086df311 | 1149 | dwarf_loc_section = sectp; |
c906108c | 1150 | } |
233a11ab | 1151 | else if (section_is_p (sectp, MACINFO_SECTION)) |
c906108c | 1152 | { |
2c500098 | 1153 | dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp); |
0cf824c9 | 1154 | dwarf_macinfo_section = sectp; |
c906108c | 1155 | } |
233a11ab | 1156 | else if (section_is_p (sectp, STR_SECTION)) |
c906108c | 1157 | { |
2c500098 | 1158 | dwarf2_per_objfile->str_size = bfd_get_section_size (sectp); |
086df311 | 1159 | dwarf_str_section = sectp; |
c906108c | 1160 | } |
233a11ab | 1161 | else if (section_is_p (sectp, FRAME_SECTION)) |
b6af0555 | 1162 | { |
2c500098 | 1163 | dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp); |
086df311 | 1164 | dwarf_frame_section = sectp; |
b6af0555 | 1165 | } |
233a11ab | 1166 | else if (section_is_p (sectp, EH_FRAME_SECTION)) |
b6af0555 | 1167 | { |
3799ccc6 EZ |
1168 | flagword aflag = bfd_get_section_flags (ignore_abfd, sectp); |
1169 | if (aflag & SEC_HAS_CONTENTS) | |
1170 | { | |
2c500098 | 1171 | dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp); |
3799ccc6 EZ |
1172 | dwarf_eh_frame_section = sectp; |
1173 | } | |
b6af0555 | 1174 | } |
233a11ab | 1175 | else if (section_is_p (sectp, RANGES_SECTION)) |
af34e669 | 1176 | { |
2c500098 | 1177 | dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp); |
6f10aeb1 | 1178 | dwarf_ranges_section = sectp; |
af34e669 | 1179 | } |
72dca2f5 FR |
1180 | |
1181 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) | |
1182 | && bfd_section_vma (abfd, sectp) == 0) | |
1183 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1184 | } |
1185 | ||
233a11ab CS |
1186 | /* This function is called after decompressing a section, so |
1187 | dwarf2_per_objfile can record its new, uncompressed size. */ | |
1188 | ||
1189 | static void | |
1190 | dwarf2_resize_section (asection *sectp, bfd_size_type new_size) | |
1191 | { | |
1192 | if (section_is_p (sectp, INFO_SECTION)) | |
1193 | dwarf2_per_objfile->info_size = new_size; | |
1194 | else if (section_is_p (sectp, ABBREV_SECTION)) | |
1195 | dwarf2_per_objfile->abbrev_size = new_size; | |
1196 | else if (section_is_p (sectp, LINE_SECTION)) | |
1197 | dwarf2_per_objfile->line_size = new_size; | |
1198 | else if (section_is_p (sectp, PUBNAMES_SECTION)) | |
1199 | dwarf2_per_objfile->pubnames_size = new_size; | |
1200 | else if (section_is_p (sectp, ARANGES_SECTION)) | |
1201 | dwarf2_per_objfile->aranges_size = new_size; | |
1202 | else if (section_is_p (sectp, LOC_SECTION)) | |
1203 | dwarf2_per_objfile->loc_size = new_size; | |
1204 | else if (section_is_p (sectp, MACINFO_SECTION)) | |
1205 | dwarf2_per_objfile->macinfo_size = new_size; | |
1206 | else if (section_is_p (sectp, STR_SECTION)) | |
1207 | dwarf2_per_objfile->str_size = new_size; | |
1208 | else if (section_is_p (sectp, FRAME_SECTION)) | |
1209 | dwarf2_per_objfile->frame_size = new_size; | |
1210 | else if (section_is_p (sectp, EH_FRAME_SECTION)) | |
1211 | dwarf2_per_objfile->eh_frame_size = new_size; | |
1212 | else if (section_is_p (sectp, RANGES_SECTION)) | |
1213 | dwarf2_per_objfile->ranges_size = new_size; | |
1214 | else | |
1215 | internal_error (__FILE__, __LINE__, | |
1216 | _("dwarf2_resize_section: missing section_is_p check: %s"), | |
1217 | sectp->name); | |
1218 | } | |
1219 | ||
c906108c SS |
1220 | /* Build a partial symbol table. */ |
1221 | ||
1222 | void | |
fba45db2 | 1223 | dwarf2_build_psymtabs (struct objfile *objfile, int mainline) |
c906108c | 1224 | { |
c906108c SS |
1225 | /* We definitely need the .debug_info and .debug_abbrev sections */ |
1226 | ||
6502dd73 DJ |
1227 | dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section); |
1228 | dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section); | |
188dd5d6 DJ |
1229 | |
1230 | if (dwarf_line_section) | |
6502dd73 | 1231 | dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section); |
41ff2da1 | 1232 | else |
6502dd73 | 1233 | dwarf2_per_objfile->line_buffer = NULL; |
c906108c | 1234 | |
188dd5d6 | 1235 | if (dwarf_str_section) |
6502dd73 | 1236 | dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section); |
4bdf3d34 | 1237 | else |
6502dd73 | 1238 | dwarf2_per_objfile->str_buffer = NULL; |
4bdf3d34 | 1239 | |
188dd5d6 | 1240 | if (dwarf_macinfo_section) |
6502dd73 | 1241 | dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile, |
086df311 | 1242 | dwarf_macinfo_section); |
2e276125 | 1243 | else |
6502dd73 | 1244 | dwarf2_per_objfile->macinfo_buffer = NULL; |
2e276125 | 1245 | |
188dd5d6 | 1246 | if (dwarf_ranges_section) |
6502dd73 | 1247 | dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section); |
af34e669 | 1248 | else |
6502dd73 | 1249 | dwarf2_per_objfile->ranges_buffer = NULL; |
af34e669 | 1250 | |
188dd5d6 | 1251 | if (dwarf_loc_section) |
6502dd73 | 1252 | dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section); |
0d53c4c4 | 1253 | else |
6502dd73 | 1254 | dwarf2_per_objfile->loc_buffer = NULL; |
0d53c4c4 | 1255 | |
ef96bde8 EZ |
1256 | if (mainline |
1257 | || (objfile->global_psymbols.size == 0 | |
1258 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
1259 | { |
1260 | init_psymbol_list (objfile, 1024); | |
1261 | } | |
1262 | ||
1263 | #if 0 | |
1264 | if (dwarf_aranges_offset && dwarf_pubnames_offset) | |
1265 | { | |
d4f3574e | 1266 | /* Things are significantly easier if we have .debug_aranges and |
c906108c SS |
1267 | .debug_pubnames sections */ |
1268 | ||
d4f3574e | 1269 | dwarf2_build_psymtabs_easy (objfile, mainline); |
c906108c SS |
1270 | } |
1271 | else | |
1272 | #endif | |
1273 | /* only test this case for now */ | |
c5aa993b | 1274 | { |
c906108c | 1275 | /* In this case we have to work a bit harder */ |
d4f3574e | 1276 | dwarf2_build_psymtabs_hard (objfile, mainline); |
c906108c SS |
1277 | } |
1278 | } | |
1279 | ||
1280 | #if 0 | |
1281 | /* Build the partial symbol table from the information in the | |
1282 | .debug_pubnames and .debug_aranges sections. */ | |
1283 | ||
1284 | static void | |
fba45db2 | 1285 | dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) |
c906108c SS |
1286 | { |
1287 | bfd *abfd = objfile->obfd; | |
1288 | char *aranges_buffer, *pubnames_buffer; | |
1289 | char *aranges_ptr, *pubnames_ptr; | |
1290 | unsigned int entry_length, version, info_offset, info_size; | |
1291 | ||
1292 | pubnames_buffer = dwarf2_read_section (objfile, | |
086df311 | 1293 | dwarf_pubnames_section); |
c906108c | 1294 | pubnames_ptr = pubnames_buffer; |
6502dd73 | 1295 | while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size) |
c906108c | 1296 | { |
613e1657 | 1297 | struct comp_unit_head cu_header; |
891d2f0b | 1298 | unsigned int bytes_read; |
613e1657 KB |
1299 | |
1300 | entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header, | |
891d2f0b | 1301 | &bytes_read); |
613e1657 | 1302 | pubnames_ptr += bytes_read; |
c906108c SS |
1303 | version = read_1_byte (abfd, pubnames_ptr); |
1304 | pubnames_ptr += 1; | |
1305 | info_offset = read_4_bytes (abfd, pubnames_ptr); | |
1306 | pubnames_ptr += 4; | |
1307 | info_size = read_4_bytes (abfd, pubnames_ptr); | |
1308 | pubnames_ptr += 4; | |
1309 | } | |
1310 | ||
1311 | aranges_buffer = dwarf2_read_section (objfile, | |
086df311 | 1312 | dwarf_aranges_section); |
c906108c SS |
1313 | |
1314 | } | |
1315 | #endif | |
1316 | ||
107d2387 | 1317 | /* Read in the comp unit header information from the debug_info at |
917c78fc | 1318 | info_ptr. */ |
107d2387 | 1319 | |
fe1b8b76 | 1320 | static gdb_byte * |
107d2387 | 1321 | read_comp_unit_head (struct comp_unit_head *cu_header, |
fe1b8b76 | 1322 | gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
1323 | { |
1324 | int signed_addr; | |
891d2f0b | 1325 | unsigned int bytes_read; |
613e1657 KB |
1326 | cu_header->length = read_initial_length (abfd, info_ptr, cu_header, |
1327 | &bytes_read); | |
1328 | info_ptr += bytes_read; | |
107d2387 AC |
1329 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1330 | info_ptr += 2; | |
613e1657 KB |
1331 | cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, |
1332 | &bytes_read); | |
1333 | info_ptr += bytes_read; | |
107d2387 AC |
1334 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
1335 | info_ptr += 1; | |
1336 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
1337 | if (signed_addr < 0) | |
8e65ff28 | 1338 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1339 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 AC |
1340 | cu_header->signed_addr_p = signed_addr; |
1341 | return info_ptr; | |
1342 | } | |
1343 | ||
fe1b8b76 JB |
1344 | static gdb_byte * |
1345 | partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr, | |
72bf9492 DJ |
1346 | bfd *abfd) |
1347 | { | |
fe1b8b76 | 1348 | gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 DJ |
1349 | |
1350 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); | |
1351 | ||
2b949cb6 | 1352 | if (header->version != 2 && header->version != 3) |
8a3fe4f8 AC |
1353 | error (_("Dwarf Error: wrong version in compilation unit header " |
1354 | "(is %d, should be %d) [in module %s]"), header->version, | |
72bf9492 DJ |
1355 | 2, bfd_get_filename (abfd)); |
1356 | ||
1357 | if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size) | |
8a3fe4f8 AC |
1358 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
1359 | "(offset 0x%lx + 6) [in module %s]"), | |
72bf9492 DJ |
1360 | (long) header->abbrev_offset, |
1361 | (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer), | |
1362 | bfd_get_filename (abfd)); | |
1363 | ||
1364 | if (beg_of_comp_unit + header->length + header->initial_length_size | |
1365 | > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size) | |
8a3fe4f8 AC |
1366 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " |
1367 | "(offset 0x%lx + 0) [in module %s]"), | |
72bf9492 DJ |
1368 | (long) header->length, |
1369 | (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer), | |
1370 | bfd_get_filename (abfd)); | |
1371 | ||
1372 | return info_ptr; | |
1373 | } | |
1374 | ||
aaa75496 JB |
1375 | /* Allocate a new partial symtab for file named NAME and mark this new |
1376 | partial symtab as being an include of PST. */ | |
1377 | ||
1378 | static void | |
1379 | dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst, | |
1380 | struct objfile *objfile) | |
1381 | { | |
1382 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
1383 | ||
1384 | subpst->section_offsets = pst->section_offsets; | |
1385 | subpst->textlow = 0; | |
1386 | subpst->texthigh = 0; | |
1387 | ||
1388 | subpst->dependencies = (struct partial_symtab **) | |
1389 | obstack_alloc (&objfile->objfile_obstack, | |
1390 | sizeof (struct partial_symtab *)); | |
1391 | subpst->dependencies[0] = pst; | |
1392 | subpst->number_of_dependencies = 1; | |
1393 | ||
1394 | subpst->globals_offset = 0; | |
1395 | subpst->n_global_syms = 0; | |
1396 | subpst->statics_offset = 0; | |
1397 | subpst->n_static_syms = 0; | |
1398 | subpst->symtab = NULL; | |
1399 | subpst->read_symtab = pst->read_symtab; | |
1400 | subpst->readin = 0; | |
1401 | ||
1402 | /* No private part is necessary for include psymtabs. This property | |
1403 | can be used to differentiate between such include psymtabs and | |
10b3939b | 1404 | the regular ones. */ |
58a9656e | 1405 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
1406 | } |
1407 | ||
1408 | /* Read the Line Number Program data and extract the list of files | |
1409 | included by the source file represented by PST. Build an include | |
1410 | partial symtab for each of these included files. | |
1411 | ||
1412 | This procedure assumes that there *is* a Line Number Program in | |
1413 | the given CU. Callers should check that PDI->HAS_STMT_LIST is set | |
1414 | before calling this procedure. */ | |
1415 | ||
1416 | static void | |
1417 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
1418 | struct partial_die_info *pdi, | |
1419 | struct partial_symtab *pst) | |
1420 | { | |
1421 | struct objfile *objfile = cu->objfile; | |
1422 | bfd *abfd = objfile->obfd; | |
1423 | struct line_header *lh; | |
1424 | ||
1425 | lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu); | |
1426 | if (lh == NULL) | |
1427 | return; /* No linetable, so no includes. */ | |
1428 | ||
1429 | dwarf_decode_lines (lh, NULL, abfd, cu, pst); | |
1430 | ||
1431 | free_line_header (lh); | |
1432 | } | |
1433 | ||
1434 | ||
c906108c SS |
1435 | /* Build the partial symbol table by doing a quick pass through the |
1436 | .debug_info and .debug_abbrev sections. */ | |
1437 | ||
1438 | static void | |
fba45db2 | 1439 | dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) |
c906108c SS |
1440 | { |
1441 | /* Instead of reading this into a big buffer, we should probably use | |
1442 | mmap() on architectures that support it. (FIXME) */ | |
1443 | bfd *abfd = objfile->obfd; | |
fe1b8b76 JB |
1444 | gdb_byte *info_ptr; |
1445 | gdb_byte *beg_of_comp_unit; | |
c906108c SS |
1446 | struct partial_die_info comp_unit_die; |
1447 | struct partial_symtab *pst; | |
ae038cb0 | 1448 | struct cleanup *back_to; |
e142c38c | 1449 | CORE_ADDR lowpc, highpc, baseaddr; |
c906108c | 1450 | |
6502dd73 | 1451 | info_ptr = dwarf2_per_objfile->info_buffer; |
c906108c | 1452 | |
ae038cb0 DJ |
1453 | /* Any cached compilation units will be linked by the per-objfile |
1454 | read_in_chain. Make sure to free them when we're done. */ | |
1455 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
1456 | ||
10b3939b DJ |
1457 | create_all_comp_units (objfile); |
1458 | ||
ff013f42 JK |
1459 | objfile->psymtabs_addrmap = addrmap_create_mutable |
1460 | (&objfile->objfile_obstack); | |
1461 | ||
6502dd73 | 1462 | /* Since the objects we're extracting from .debug_info vary in |
af703f96 | 1463 | length, only the individual functions to extract them (like |
72bf9492 | 1464 | read_comp_unit_head and load_partial_die) can really know whether |
af703f96 JB |
1465 | the buffer is large enough to hold another complete object. |
1466 | ||
6502dd73 DJ |
1467 | At the moment, they don't actually check that. If .debug_info |
1468 | holds just one extra byte after the last compilation unit's dies, | |
1469 | then read_comp_unit_head will happily read off the end of the | |
1470 | buffer. read_partial_die is similarly casual. Those functions | |
1471 | should be fixed. | |
af703f96 JB |
1472 | |
1473 | For this loop condition, simply checking whether there's any data | |
1474 | left at all should be sufficient. */ | |
6502dd73 DJ |
1475 | while (info_ptr < (dwarf2_per_objfile->info_buffer |
1476 | + dwarf2_per_objfile->info_size)) | |
c906108c | 1477 | { |
f3dd6933 | 1478 | struct cleanup *back_to_inner; |
e7c27a73 | 1479 | struct dwarf2_cu cu; |
72bf9492 DJ |
1480 | struct abbrev_info *abbrev; |
1481 | unsigned int bytes_read; | |
1482 | struct dwarf2_per_cu_data *this_cu; | |
1483 | ||
c906108c | 1484 | beg_of_comp_unit = info_ptr; |
c906108c | 1485 | |
72bf9492 DJ |
1486 | memset (&cu, 0, sizeof (cu)); |
1487 | ||
1488 | obstack_init (&cu.comp_unit_obstack); | |
1489 | ||
1490 | back_to_inner = make_cleanup (free_stack_comp_unit, &cu); | |
1491 | ||
e7c27a73 | 1492 | cu.objfile = objfile; |
72bf9492 | 1493 | info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd); |
e7c27a73 | 1494 | |
57349743 | 1495 | /* Complete the cu_header */ |
6502dd73 | 1496 | cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer; |
d00adf39 | 1497 | cu.header.first_die_offset = info_ptr - beg_of_comp_unit; |
57349743 | 1498 | |
e142c38c DJ |
1499 | cu.list_in_scope = &file_symbols; |
1500 | ||
c906108c | 1501 | /* Read the abbrevs for this compilation unit into a table */ |
e7c27a73 | 1502 | dwarf2_read_abbrevs (abfd, &cu); |
72bf9492 | 1503 | make_cleanup (dwarf2_free_abbrev_table, &cu); |
c906108c | 1504 | |
10b3939b | 1505 | this_cu = dwarf2_find_comp_unit (cu.header.offset, objfile); |
ae038cb0 | 1506 | |
c906108c | 1507 | /* Read the compilation unit die */ |
72bf9492 DJ |
1508 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu); |
1509 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
1510 | abfd, info_ptr, &cu); | |
c906108c | 1511 | |
31ffec48 DJ |
1512 | if (comp_unit_die.tag == DW_TAG_partial_unit) |
1513 | { | |
1514 | info_ptr = (beg_of_comp_unit + cu.header.length | |
1515 | + cu.header.initial_length_size); | |
1516 | do_cleanups (back_to_inner); | |
1517 | continue; | |
1518 | } | |
1519 | ||
c906108c | 1520 | /* Set the language we're debugging */ |
e142c38c | 1521 | set_cu_language (comp_unit_die.language, &cu); |
c906108c SS |
1522 | |
1523 | /* Allocate a new partial symbol table structure */ | |
d4f3574e | 1524 | pst = start_psymtab_common (objfile, objfile->section_offsets, |
96baa820 | 1525 | comp_unit_die.name ? comp_unit_die.name : "", |
ff013f42 JK |
1526 | /* TEXTLOW and TEXTHIGH are set below. */ |
1527 | 0, | |
c906108c SS |
1528 | objfile->global_psymbols.next, |
1529 | objfile->static_psymbols.next); | |
1530 | ||
ae038cb0 | 1531 | if (comp_unit_die.dirname) |
a683b3c0 TT |
1532 | pst->dirname = obsavestring (comp_unit_die.dirname, |
1533 | strlen (comp_unit_die.dirname), | |
1534 | &objfile->objfile_obstack); | |
57c22c6c | 1535 | |
10b3939b DJ |
1536 | pst->read_symtab_private = (char *) this_cu; |
1537 | ||
613e1657 | 1538 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
1539 | |
1540 | /* Store the function that reads in the rest of the symbol table */ | |
1541 | pst->read_symtab = dwarf2_psymtab_to_symtab; | |
1542 | ||
10b3939b DJ |
1543 | /* If this compilation unit was already read in, free the |
1544 | cached copy in order to read it in again. This is | |
1545 | necessary because we skipped some symbols when we first | |
1546 | read in the compilation unit (see load_partial_dies). | |
1547 | This problem could be avoided, but the benefit is | |
1548 | unclear. */ | |
1549 | if (this_cu->cu != NULL) | |
1550 | free_one_cached_comp_unit (this_cu->cu); | |
ae038cb0 | 1551 | |
10b3939b | 1552 | cu.per_cu = this_cu; |
ae038cb0 | 1553 | |
10b3939b DJ |
1554 | /* Note that this is a pointer to our stack frame, being |
1555 | added to a global data structure. It will be cleaned up | |
1556 | in free_stack_comp_unit when we finish with this | |
1557 | compilation unit. */ | |
1558 | this_cu->cu = &cu; | |
ae038cb0 | 1559 | |
10b3939b | 1560 | this_cu->psymtab = pst; |
ae038cb0 | 1561 | |
ff013f42 JK |
1562 | /* Possibly set the default values of LOWPC and HIGHPC from |
1563 | `DW_AT_ranges'. */ | |
1564 | if (cu.has_ranges_offset) | |
1565 | { | |
1566 | if (dwarf2_ranges_read (cu.ranges_offset, &comp_unit_die.lowpc, | |
1567 | &comp_unit_die.highpc, &cu, pst)) | |
1568 | comp_unit_die.has_pc_info = 1; | |
1569 | } | |
1570 | ||
c906108c SS |
1571 | /* Check if comp unit has_children. |
1572 | If so, read the rest of the partial symbols from this comp unit. | |
1573 | If not, there's no more debug_info for this comp unit. */ | |
1574 | if (comp_unit_die.has_children) | |
1575 | { | |
72bf9492 DJ |
1576 | struct partial_die_info *first_die; |
1577 | ||
91c24f0a DC |
1578 | lowpc = ((CORE_ADDR) -1); |
1579 | highpc = ((CORE_ADDR) 0); | |
1580 | ||
72bf9492 DJ |
1581 | first_die = load_partial_dies (abfd, info_ptr, 1, &cu); |
1582 | ||
1583 | scan_partial_symbols (first_die, &lowpc, &highpc, &cu); | |
c906108c | 1584 | |
91c24f0a DC |
1585 | /* If we didn't find a lowpc, set it to highpc to avoid |
1586 | complaints from `maint check'. */ | |
1587 | if (lowpc == ((CORE_ADDR) -1)) | |
1588 | lowpc = highpc; | |
72bf9492 | 1589 | |
c906108c SS |
1590 | /* If the compilation unit didn't have an explicit address range, |
1591 | then use the information extracted from its child dies. */ | |
0b010bcc | 1592 | if (! comp_unit_die.has_pc_info) |
c906108c | 1593 | { |
c5aa993b | 1594 | comp_unit_die.lowpc = lowpc; |
c906108c SS |
1595 | comp_unit_die.highpc = highpc; |
1596 | } | |
1597 | } | |
c5aa993b | 1598 | pst->textlow = comp_unit_die.lowpc + baseaddr; |
c906108c SS |
1599 | pst->texthigh = comp_unit_die.highpc + baseaddr; |
1600 | ||
ff013f42 JK |
1601 | /* Store the contiguous range; `DW_AT_ranges' range is stored above. The |
1602 | range can be also empty for CUs with no code. */ | |
1603 | if (!cu.has_ranges_offset && pst->textlow < pst->texthigh) | |
1604 | addrmap_set_empty (objfile->psymtabs_addrmap, pst->textlow, | |
1605 | pst->texthigh - 1, pst); | |
1606 | ||
c906108c SS |
1607 | pst->n_global_syms = objfile->global_psymbols.next - |
1608 | (objfile->global_psymbols.list + pst->globals_offset); | |
1609 | pst->n_static_syms = objfile->static_psymbols.next - | |
1610 | (objfile->static_psymbols.list + pst->statics_offset); | |
1611 | sort_pst_symbols (pst); | |
1612 | ||
1613 | /* If there is already a psymtab or symtab for a file of this | |
1614 | name, remove it. (If there is a symtab, more drastic things | |
1615 | also happen.) This happens in VxWorks. */ | |
1616 | free_named_symtabs (pst->filename); | |
1617 | ||
dd373385 EZ |
1618 | info_ptr = beg_of_comp_unit + cu.header.length |
1619 | + cu.header.initial_length_size; | |
1620 | ||
aaa75496 JB |
1621 | if (comp_unit_die.has_stmt_list) |
1622 | { | |
1623 | /* Get the list of files included in the current compilation unit, | |
1624 | and build a psymtab for each of them. */ | |
1625 | dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst); | |
1626 | } | |
1627 | ||
f3dd6933 | 1628 | do_cleanups (back_to_inner); |
c906108c | 1629 | } |
ff013f42 JK |
1630 | |
1631 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, | |
1632 | &objfile->objfile_obstack); | |
1633 | ||
ae038cb0 DJ |
1634 | do_cleanups (back_to); |
1635 | } | |
1636 | ||
1637 | /* Load the DIEs for a secondary CU into memory. */ | |
1638 | ||
1639 | static void | |
1640 | load_comp_unit (struct dwarf2_per_cu_data *this_cu, struct objfile *objfile) | |
1641 | { | |
1642 | bfd *abfd = objfile->obfd; | |
fe1b8b76 | 1643 | gdb_byte *info_ptr, *beg_of_comp_unit; |
ae038cb0 DJ |
1644 | struct partial_die_info comp_unit_die; |
1645 | struct dwarf2_cu *cu; | |
1646 | struct abbrev_info *abbrev; | |
1647 | unsigned int bytes_read; | |
1648 | struct cleanup *back_to; | |
1649 | ||
1650 | info_ptr = dwarf2_per_objfile->info_buffer + this_cu->offset; | |
1651 | beg_of_comp_unit = info_ptr; | |
1652 | ||
1653 | cu = xmalloc (sizeof (struct dwarf2_cu)); | |
1654 | memset (cu, 0, sizeof (struct dwarf2_cu)); | |
1655 | ||
1656 | obstack_init (&cu->comp_unit_obstack); | |
1657 | ||
1658 | cu->objfile = objfile; | |
1659 | info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd); | |
1660 | ||
1661 | /* Complete the cu_header. */ | |
1662 | cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer; | |
d00adf39 | 1663 | cu->header.first_die_offset = info_ptr - beg_of_comp_unit; |
ae038cb0 DJ |
1664 | |
1665 | /* Read the abbrevs for this compilation unit into a table. */ | |
1666 | dwarf2_read_abbrevs (abfd, cu); | |
1667 | back_to = make_cleanup (dwarf2_free_abbrev_table, cu); | |
1668 | ||
1669 | /* Read the compilation unit die. */ | |
1670 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
1671 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
1672 | abfd, info_ptr, cu); | |
1673 | ||
1674 | /* Set the language we're debugging. */ | |
1675 | set_cu_language (comp_unit_die.language, cu); | |
1676 | ||
1677 | /* Link this compilation unit into the compilation unit tree. */ | |
1678 | this_cu->cu = cu; | |
1679 | cu->per_cu = this_cu; | |
f792889a | 1680 | cu->type_hash = cu->per_cu->type_hash; |
ae038cb0 DJ |
1681 | |
1682 | /* Check if comp unit has_children. | |
1683 | If so, read the rest of the partial symbols from this comp unit. | |
1684 | If not, there's no more debug_info for this comp unit. */ | |
1685 | if (comp_unit_die.has_children) | |
1686 | load_partial_dies (abfd, info_ptr, 0, cu); | |
1687 | ||
1688 | do_cleanups (back_to); | |
1689 | } | |
1690 | ||
1691 | /* Create a list of all compilation units in OBJFILE. We do this only | |
1692 | if an inter-comp-unit reference is found; presumably if there is one, | |
1693 | there will be many, and one will occur early in the .debug_info section. | |
1694 | So there's no point in building this list incrementally. */ | |
1695 | ||
1696 | static void | |
1697 | create_all_comp_units (struct objfile *objfile) | |
1698 | { | |
1699 | int n_allocated; | |
1700 | int n_comp_units; | |
1701 | struct dwarf2_per_cu_data **all_comp_units; | |
fe1b8b76 | 1702 | gdb_byte *info_ptr = dwarf2_per_objfile->info_buffer; |
ae038cb0 DJ |
1703 | |
1704 | n_comp_units = 0; | |
1705 | n_allocated = 10; | |
1706 | all_comp_units = xmalloc (n_allocated | |
1707 | * sizeof (struct dwarf2_per_cu_data *)); | |
1708 | ||
1709 | while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size) | |
1710 | { | |
1711 | struct comp_unit_head cu_header; | |
fe1b8b76 | 1712 | gdb_byte *beg_of_comp_unit; |
ae038cb0 DJ |
1713 | struct dwarf2_per_cu_data *this_cu; |
1714 | unsigned long offset; | |
891d2f0b | 1715 | unsigned int bytes_read; |
ae038cb0 DJ |
1716 | |
1717 | offset = info_ptr - dwarf2_per_objfile->info_buffer; | |
1718 | ||
1719 | /* Read just enough information to find out where the next | |
1720 | compilation unit is. */ | |
dd373385 | 1721 | cu_header.initial_length_size = 0; |
ae038cb0 DJ |
1722 | cu_header.length = read_initial_length (objfile->obfd, info_ptr, |
1723 | &cu_header, &bytes_read); | |
1724 | ||
1725 | /* Save the compilation unit for later lookup. */ | |
1726 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
1727 | sizeof (struct dwarf2_per_cu_data)); | |
1728 | memset (this_cu, 0, sizeof (*this_cu)); | |
1729 | this_cu->offset = offset; | |
1730 | this_cu->length = cu_header.length + cu_header.initial_length_size; | |
1731 | ||
1732 | if (n_comp_units == n_allocated) | |
1733 | { | |
1734 | n_allocated *= 2; | |
1735 | all_comp_units = xrealloc (all_comp_units, | |
1736 | n_allocated | |
1737 | * sizeof (struct dwarf2_per_cu_data *)); | |
1738 | } | |
1739 | all_comp_units[n_comp_units++] = this_cu; | |
1740 | ||
1741 | info_ptr = info_ptr + this_cu->length; | |
1742 | } | |
1743 | ||
1744 | dwarf2_per_objfile->all_comp_units | |
1745 | = obstack_alloc (&objfile->objfile_obstack, | |
1746 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
1747 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
1748 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
1749 | xfree (all_comp_units); | |
1750 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
1751 | } |
1752 | ||
72bf9492 DJ |
1753 | /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE. |
1754 | Also set *LOWPC and *HIGHPC to the lowest and highest PC values found | |
1755 | in CU. */ | |
c906108c | 1756 | |
72bf9492 DJ |
1757 | static void |
1758 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
1759 | CORE_ADDR *highpc, struct dwarf2_cu *cu) | |
c906108c | 1760 | { |
e7c27a73 | 1761 | struct objfile *objfile = cu->objfile; |
c906108c | 1762 | bfd *abfd = objfile->obfd; |
72bf9492 | 1763 | struct partial_die_info *pdi; |
c906108c | 1764 | |
91c24f0a DC |
1765 | /* Now, march along the PDI's, descending into ones which have |
1766 | interesting children but skipping the children of the other ones, | |
1767 | until we reach the end of the compilation unit. */ | |
c906108c | 1768 | |
72bf9492 | 1769 | pdi = first_die; |
91c24f0a | 1770 | |
72bf9492 DJ |
1771 | while (pdi != NULL) |
1772 | { | |
1773 | fixup_partial_die (pdi, cu); | |
c906108c | 1774 | |
91c24f0a DC |
1775 | /* Anonymous namespaces have no name but have interesting |
1776 | children, so we need to look at them. Ditto for anonymous | |
1777 | enums. */ | |
933c6fe4 | 1778 | |
72bf9492 DJ |
1779 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
1780 | || pdi->tag == DW_TAG_enumeration_type) | |
c906108c | 1781 | { |
72bf9492 | 1782 | switch (pdi->tag) |
c906108c SS |
1783 | { |
1784 | case DW_TAG_subprogram: | |
bc30ff58 | 1785 | add_partial_subprogram (pdi, lowpc, highpc, cu); |
c906108c SS |
1786 | break; |
1787 | case DW_TAG_variable: | |
1788 | case DW_TAG_typedef: | |
91c24f0a | 1789 | case DW_TAG_union_type: |
72bf9492 | 1790 | if (!pdi->is_declaration) |
63d06c5c | 1791 | { |
72bf9492 | 1792 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
1793 | } |
1794 | break; | |
c906108c | 1795 | case DW_TAG_class_type: |
680b30c7 | 1796 | case DW_TAG_interface_type: |
c906108c | 1797 | case DW_TAG_structure_type: |
72bf9492 | 1798 | if (!pdi->is_declaration) |
c906108c | 1799 | { |
72bf9492 | 1800 | add_partial_symbol (pdi, cu); |
c906108c SS |
1801 | } |
1802 | break; | |
91c24f0a | 1803 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
1804 | if (!pdi->is_declaration) |
1805 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
1806 | break; |
1807 | case DW_TAG_base_type: | |
a02abb62 | 1808 | case DW_TAG_subrange_type: |
c906108c | 1809 | /* File scope base type definitions are added to the partial |
c5aa993b | 1810 | symbol table. */ |
72bf9492 | 1811 | add_partial_symbol (pdi, cu); |
c906108c | 1812 | break; |
d9fa45fe | 1813 | case DW_TAG_namespace: |
72bf9492 | 1814 | add_partial_namespace (pdi, lowpc, highpc, cu); |
91c24f0a | 1815 | break; |
c906108c SS |
1816 | default: |
1817 | break; | |
1818 | } | |
1819 | } | |
1820 | ||
72bf9492 DJ |
1821 | /* If the die has a sibling, skip to the sibling. */ |
1822 | ||
1823 | pdi = pdi->die_sibling; | |
1824 | } | |
1825 | } | |
1826 | ||
1827 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 1828 | |
72bf9492 | 1829 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
1830 | name is concatenated with "::" and the partial DIE's name. For |
1831 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
1832 | Enumerators are an exception; they use the scope of their parent |
1833 | enumeration type, i.e. the name of the enumeration type is not | |
1834 | prepended to the enumerator. | |
91c24f0a | 1835 | |
72bf9492 DJ |
1836 | There are two complexities. One is DW_AT_specification; in this |
1837 | case "parent" means the parent of the target of the specification, | |
1838 | instead of the direct parent of the DIE. The other is compilers | |
1839 | which do not emit DW_TAG_namespace; in this case we try to guess | |
1840 | the fully qualified name of structure types from their members' | |
1841 | linkage names. This must be done using the DIE's children rather | |
1842 | than the children of any DW_AT_specification target. We only need | |
1843 | to do this for structures at the top level, i.e. if the target of | |
1844 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
1845 | have a parent. */ | |
1846 | ||
1847 | /* Compute the scope prefix associated with PDI's parent, in | |
1848 | compilation unit CU. The result will be allocated on CU's | |
1849 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
1850 | field. NULL is returned if no prefix is necessary. */ | |
1851 | static char * | |
1852 | partial_die_parent_scope (struct partial_die_info *pdi, | |
1853 | struct dwarf2_cu *cu) | |
1854 | { | |
1855 | char *grandparent_scope; | |
1856 | struct partial_die_info *parent, *real_pdi; | |
91c24f0a | 1857 | |
72bf9492 DJ |
1858 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
1859 | then this means the parent of the specification DIE. */ | |
1860 | ||
1861 | real_pdi = pdi; | |
72bf9492 | 1862 | while (real_pdi->has_specification) |
10b3939b | 1863 | real_pdi = find_partial_die (real_pdi->spec_offset, cu); |
72bf9492 DJ |
1864 | |
1865 | parent = real_pdi->die_parent; | |
1866 | if (parent == NULL) | |
1867 | return NULL; | |
1868 | ||
1869 | if (parent->scope_set) | |
1870 | return parent->scope; | |
1871 | ||
1872 | fixup_partial_die (parent, cu); | |
1873 | ||
10b3939b | 1874 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 DJ |
1875 | |
1876 | if (parent->tag == DW_TAG_namespace | |
1877 | || parent->tag == DW_TAG_structure_type | |
1878 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 1879 | || parent->tag == DW_TAG_interface_type |
72bf9492 DJ |
1880 | || parent->tag == DW_TAG_union_type) |
1881 | { | |
1882 | if (grandparent_scope == NULL) | |
1883 | parent->scope = parent->name; | |
1884 | else | |
987504bb JJ |
1885 | parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope, |
1886 | parent->name, cu); | |
72bf9492 DJ |
1887 | } |
1888 | else if (parent->tag == DW_TAG_enumeration_type) | |
1889 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
1890 | parent->scope = grandparent_scope; | |
1891 | else | |
1892 | { | |
1893 | /* FIXME drow/2004-04-01: What should we be doing with | |
1894 | function-local names? For partial symbols, we should probably be | |
1895 | ignoring them. */ | |
1896 | complaint (&symfile_complaints, | |
e2e0b3e5 | 1897 | _("unhandled containing DIE tag %d for DIE at %d"), |
72bf9492 DJ |
1898 | parent->tag, pdi->offset); |
1899 | parent->scope = grandparent_scope; | |
c906108c SS |
1900 | } |
1901 | ||
72bf9492 DJ |
1902 | parent->scope_set = 1; |
1903 | return parent->scope; | |
1904 | } | |
1905 | ||
1906 | /* Return the fully scoped name associated with PDI, from compilation unit | |
1907 | CU. The result will be allocated with malloc. */ | |
1908 | static char * | |
1909 | partial_die_full_name (struct partial_die_info *pdi, | |
1910 | struct dwarf2_cu *cu) | |
1911 | { | |
1912 | char *parent_scope; | |
1913 | ||
1914 | parent_scope = partial_die_parent_scope (pdi, cu); | |
1915 | if (parent_scope == NULL) | |
1916 | return NULL; | |
1917 | else | |
987504bb | 1918 | return typename_concat (NULL, parent_scope, pdi->name, cu); |
c906108c SS |
1919 | } |
1920 | ||
1921 | static void | |
72bf9492 | 1922 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 1923 | { |
e7c27a73 | 1924 | struct objfile *objfile = cu->objfile; |
c906108c | 1925 | CORE_ADDR addr = 0; |
decbce07 | 1926 | char *actual_name = NULL; |
72bf9492 | 1927 | const char *my_prefix; |
5c4e30ca | 1928 | const struct partial_symbol *psym = NULL; |
e142c38c | 1929 | CORE_ADDR baseaddr; |
72bf9492 | 1930 | int built_actual_name = 0; |
e142c38c DJ |
1931 | |
1932 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 1933 | |
72bf9492 | 1934 | if (pdi_needs_namespace (pdi->tag)) |
63d06c5c | 1935 | { |
72bf9492 DJ |
1936 | actual_name = partial_die_full_name (pdi, cu); |
1937 | if (actual_name) | |
1938 | built_actual_name = 1; | |
63d06c5c DC |
1939 | } |
1940 | ||
72bf9492 DJ |
1941 | if (actual_name == NULL) |
1942 | actual_name = pdi->name; | |
1943 | ||
c906108c SS |
1944 | switch (pdi->tag) |
1945 | { | |
1946 | case DW_TAG_subprogram: | |
2cfa0c8d | 1947 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 1948 | { |
2cfa0c8d JB |
1949 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
1950 | of the global scope. But in Ada, we want to be able to access | |
1951 | nested procedures globally. So all Ada subprograms are stored | |
1952 | in the global scope. */ | |
38d518c9 | 1953 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 1954 | mst_text, objfile); */ |
38d518c9 | 1955 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
1956 | VAR_DOMAIN, LOC_BLOCK, |
1957 | &objfile->global_psymbols, | |
1958 | 0, pdi->lowpc + baseaddr, | |
e142c38c | 1959 | cu->language, objfile); |
c906108c SS |
1960 | } |
1961 | else | |
1962 | { | |
38d518c9 | 1963 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 1964 | mst_file_text, objfile); */ |
38d518c9 | 1965 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
1966 | VAR_DOMAIN, LOC_BLOCK, |
1967 | &objfile->static_psymbols, | |
1968 | 0, pdi->lowpc + baseaddr, | |
e142c38c | 1969 | cu->language, objfile); |
c906108c SS |
1970 | } |
1971 | break; | |
1972 | case DW_TAG_variable: | |
1973 | if (pdi->is_external) | |
1974 | { | |
1975 | /* Global Variable. | |
1976 | Don't enter into the minimal symbol tables as there is | |
1977 | a minimal symbol table entry from the ELF symbols already. | |
1978 | Enter into partial symbol table if it has a location | |
1979 | descriptor or a type. | |
1980 | If the location descriptor is missing, new_symbol will create | |
1981 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
1982 | be determined from the minimal symbol table whenever the variable | |
1983 | is referenced. | |
1984 | The address for the partial symbol table entry is not | |
1985 | used by GDB, but it comes in handy for debugging partial symbol | |
1986 | table building. */ | |
1987 | ||
1988 | if (pdi->locdesc) | |
e7c27a73 | 1989 | addr = decode_locdesc (pdi->locdesc, cu); |
c906108c | 1990 | if (pdi->locdesc || pdi->has_type) |
38d518c9 | 1991 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
1992 | VAR_DOMAIN, LOC_STATIC, |
1993 | &objfile->global_psymbols, | |
1994 | 0, addr + baseaddr, | |
e142c38c | 1995 | cu->language, objfile); |
c906108c SS |
1996 | } |
1997 | else | |
1998 | { | |
1999 | /* Static Variable. Skip symbols without location descriptors. */ | |
2000 | if (pdi->locdesc == NULL) | |
decbce07 MS |
2001 | { |
2002 | if (built_actual_name) | |
2003 | xfree (actual_name); | |
2004 | return; | |
2005 | } | |
e7c27a73 | 2006 | addr = decode_locdesc (pdi->locdesc, cu); |
38d518c9 | 2007 | /*prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 2008 | mst_file_data, objfile); */ |
38d518c9 | 2009 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
5c4e30ca DC |
2010 | VAR_DOMAIN, LOC_STATIC, |
2011 | &objfile->static_psymbols, | |
2012 | 0, addr + baseaddr, | |
e142c38c | 2013 | cu->language, objfile); |
c906108c SS |
2014 | } |
2015 | break; | |
2016 | case DW_TAG_typedef: | |
2017 | case DW_TAG_base_type: | |
a02abb62 | 2018 | case DW_TAG_subrange_type: |
38d518c9 | 2019 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2020 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 2021 | &objfile->static_psymbols, |
e142c38c | 2022 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 2023 | break; |
72bf9492 DJ |
2024 | case DW_TAG_namespace: |
2025 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
2026 | VAR_DOMAIN, LOC_TYPEDEF, | |
2027 | &objfile->global_psymbols, | |
2028 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
2029 | break; | |
c906108c | 2030 | case DW_TAG_class_type: |
680b30c7 | 2031 | case DW_TAG_interface_type: |
c906108c SS |
2032 | case DW_TAG_structure_type: |
2033 | case DW_TAG_union_type: | |
2034 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
2035 | /* Skip external references. The DWARF standard says in the section |
2036 | about "Structure, Union, and Class Type Entries": "An incomplete | |
2037 | structure, union or class type is represented by a structure, | |
2038 | union or class entry that does not have a byte size attribute | |
2039 | and that has a DW_AT_declaration attribute." */ | |
2040 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 MS |
2041 | { |
2042 | if (built_actual_name) | |
2043 | xfree (actual_name); | |
2044 | return; | |
2045 | } | |
fa4028e9 | 2046 | |
63d06c5c DC |
2047 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
2048 | static vs. global. */ | |
38d518c9 | 2049 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2050 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
2051 | (cu->language == language_cplus |
2052 | || cu->language == language_java) | |
63d06c5c DC |
2053 | ? &objfile->global_psymbols |
2054 | : &objfile->static_psymbols, | |
e142c38c | 2055 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 2056 | |
c906108c SS |
2057 | break; |
2058 | case DW_TAG_enumerator: | |
38d518c9 | 2059 | add_psymbol_to_list (actual_name, strlen (actual_name), |
176620f1 | 2060 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
2061 | (cu->language == language_cplus |
2062 | || cu->language == language_java) | |
f6fe98ef DJ |
2063 | ? &objfile->global_psymbols |
2064 | : &objfile->static_psymbols, | |
e142c38c | 2065 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
2066 | break; |
2067 | default: | |
2068 | break; | |
2069 | } | |
5c4e30ca DC |
2070 | |
2071 | /* Check to see if we should scan the name for possible namespace | |
2072 | info. Only do this if this is C++, if we don't have namespace | |
2073 | debugging info in the file, if the psym is of an appropriate type | |
2074 | (otherwise we'll have psym == NULL), and if we actually had a | |
2075 | mangled name to begin with. */ | |
2076 | ||
72bf9492 DJ |
2077 | /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the |
2078 | cases which do not set PSYM above? */ | |
2079 | ||
e142c38c | 2080 | if (cu->language == language_cplus |
72bf9492 | 2081 | && cu->has_namespace_info == 0 |
5c4e30ca DC |
2082 | && psym != NULL |
2083 | && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL) | |
2084 | cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym), | |
2085 | objfile); | |
72bf9492 DJ |
2086 | |
2087 | if (built_actual_name) | |
2088 | xfree (actual_name); | |
c906108c SS |
2089 | } |
2090 | ||
72bf9492 DJ |
2091 | /* Determine whether a die of type TAG living in a C++ class or |
2092 | namespace needs to have the name of the scope prepended to the | |
63d06c5c DC |
2093 | name listed in the die. */ |
2094 | ||
2095 | static int | |
72bf9492 | 2096 | pdi_needs_namespace (enum dwarf_tag tag) |
63d06c5c | 2097 | { |
63d06c5c DC |
2098 | switch (tag) |
2099 | { | |
72bf9492 | 2100 | case DW_TAG_namespace: |
63d06c5c DC |
2101 | case DW_TAG_typedef: |
2102 | case DW_TAG_class_type: | |
680b30c7 | 2103 | case DW_TAG_interface_type: |
63d06c5c DC |
2104 | case DW_TAG_structure_type: |
2105 | case DW_TAG_union_type: | |
2106 | case DW_TAG_enumeration_type: | |
2107 | case DW_TAG_enumerator: | |
2108 | return 1; | |
2109 | default: | |
2110 | return 0; | |
2111 | } | |
2112 | } | |
2113 | ||
5c4e30ca DC |
2114 | /* Read a partial die corresponding to a namespace; also, add a symbol |
2115 | corresponding to that namespace to the symbol table. NAMESPACE is | |
2116 | the name of the enclosing namespace. */ | |
91c24f0a | 2117 | |
72bf9492 DJ |
2118 | static void |
2119 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 2120 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
72bf9492 | 2121 | struct dwarf2_cu *cu) |
91c24f0a | 2122 | { |
e7c27a73 | 2123 | struct objfile *objfile = cu->objfile; |
5c4e30ca | 2124 | |
72bf9492 | 2125 | /* Add a symbol for the namespace. */ |
e7c27a73 | 2126 | |
72bf9492 | 2127 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
2128 | |
2129 | /* Now scan partial symbols in that namespace. */ | |
2130 | ||
91c24f0a | 2131 | if (pdi->has_children) |
72bf9492 | 2132 | scan_partial_symbols (pdi->die_child, lowpc, highpc, cu); |
91c24f0a DC |
2133 | } |
2134 | ||
bc30ff58 JB |
2135 | /* Read a partial die corresponding to a subprogram and create a partial |
2136 | symbol for that subprogram. When the CU language allows it, this | |
2137 | routine also defines a partial symbol for each nested subprogram | |
2138 | that this subprogram contains. | |
2139 | ||
2140 | DIE my also be a lexical block, in which case we simply search | |
2141 | recursively for suprograms defined inside that lexical block. | |
2142 | Again, this is only performed when the CU language allows this | |
2143 | type of definitions. */ | |
2144 | ||
2145 | static void | |
2146 | add_partial_subprogram (struct partial_die_info *pdi, | |
2147 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
2148 | struct dwarf2_cu *cu) | |
2149 | { | |
2150 | if (pdi->tag == DW_TAG_subprogram) | |
2151 | { | |
2152 | if (pdi->has_pc_info) | |
2153 | { | |
2154 | if (pdi->lowpc < *lowpc) | |
2155 | *lowpc = pdi->lowpc; | |
2156 | if (pdi->highpc > *highpc) | |
2157 | *highpc = pdi->highpc; | |
2158 | if (!pdi->is_declaration) | |
2159 | add_partial_symbol (pdi, cu); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | if (! pdi->has_children) | |
2164 | return; | |
2165 | ||
2166 | if (cu->language == language_ada) | |
2167 | { | |
2168 | pdi = pdi->die_child; | |
2169 | while (pdi != NULL) | |
2170 | { | |
2171 | fixup_partial_die (pdi, cu); | |
2172 | if (pdi->tag == DW_TAG_subprogram | |
2173 | || pdi->tag == DW_TAG_lexical_block) | |
2174 | add_partial_subprogram (pdi, lowpc, highpc, cu); | |
2175 | pdi = pdi->die_sibling; | |
2176 | } | |
2177 | } | |
2178 | } | |
2179 | ||
72bf9492 DJ |
2180 | /* See if we can figure out if the class lives in a namespace. We do |
2181 | this by looking for a member function; its demangled name will | |
2182 | contain namespace info, if there is any. */ | |
63d06c5c | 2183 | |
72bf9492 DJ |
2184 | static void |
2185 | guess_structure_name (struct partial_die_info *struct_pdi, | |
2186 | struct dwarf2_cu *cu) | |
63d06c5c | 2187 | { |
987504bb JJ |
2188 | if ((cu->language == language_cplus |
2189 | || cu->language == language_java) | |
72bf9492 | 2190 | && cu->has_namespace_info == 0 |
63d06c5c DC |
2191 | && struct_pdi->has_children) |
2192 | { | |
63d06c5c DC |
2193 | /* NOTE: carlton/2003-10-07: Getting the info this way changes |
2194 | what template types look like, because the demangler | |
2195 | frequently doesn't give the same name as the debug info. We | |
2196 | could fix this by only using the demangled name to get the | |
134d01f1 | 2197 | prefix (but see comment in read_structure_type). */ |
63d06c5c | 2198 | |
72bf9492 DJ |
2199 | struct partial_die_info *child_pdi = struct_pdi->die_child; |
2200 | struct partial_die_info *real_pdi; | |
5d51ca54 | 2201 | |
72bf9492 DJ |
2202 | /* If this DIE (this DIE's specification, if any) has a parent, then |
2203 | we should not do this. We'll prepend the parent's fully qualified | |
2204 | name when we create the partial symbol. */ | |
5d51ca54 | 2205 | |
72bf9492 | 2206 | real_pdi = struct_pdi; |
72bf9492 | 2207 | while (real_pdi->has_specification) |
10b3939b | 2208 | real_pdi = find_partial_die (real_pdi->spec_offset, cu); |
63d06c5c | 2209 | |
72bf9492 DJ |
2210 | if (real_pdi->die_parent != NULL) |
2211 | return; | |
63d06c5c | 2212 | |
72bf9492 DJ |
2213 | while (child_pdi != NULL) |
2214 | { | |
2215 | if (child_pdi->tag == DW_TAG_subprogram) | |
63d06c5c | 2216 | { |
72bf9492 | 2217 | char *actual_class_name |
31c27f77 JJ |
2218 | = language_class_name_from_physname (cu->language_defn, |
2219 | child_pdi->name); | |
63d06c5c | 2220 | if (actual_class_name != NULL) |
72bf9492 DJ |
2221 | { |
2222 | struct_pdi->name | |
2223 | = obsavestring (actual_class_name, | |
2224 | strlen (actual_class_name), | |
2225 | &cu->comp_unit_obstack); | |
2226 | xfree (actual_class_name); | |
2227 | } | |
63d06c5c DC |
2228 | break; |
2229 | } | |
72bf9492 DJ |
2230 | |
2231 | child_pdi = child_pdi->die_sibling; | |
63d06c5c DC |
2232 | } |
2233 | } | |
63d06c5c DC |
2234 | } |
2235 | ||
91c24f0a DC |
2236 | /* Read a partial die corresponding to an enumeration type. */ |
2237 | ||
72bf9492 DJ |
2238 | static void |
2239 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
2240 | struct dwarf2_cu *cu) | |
91c24f0a | 2241 | { |
e7c27a73 | 2242 | struct objfile *objfile = cu->objfile; |
91c24f0a | 2243 | bfd *abfd = objfile->obfd; |
72bf9492 | 2244 | struct partial_die_info *pdi; |
91c24f0a DC |
2245 | |
2246 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
2247 | add_partial_symbol (enum_pdi, cu); |
2248 | ||
2249 | pdi = enum_pdi->die_child; | |
2250 | while (pdi) | |
91c24f0a | 2251 | { |
72bf9492 | 2252 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 2253 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 2254 | else |
72bf9492 DJ |
2255 | add_partial_symbol (pdi, cu); |
2256 | pdi = pdi->die_sibling; | |
91c24f0a | 2257 | } |
91c24f0a DC |
2258 | } |
2259 | ||
4bb7a0a7 DJ |
2260 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
2261 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
2262 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
2263 | the initial number. */ | |
2264 | ||
2265 | static struct abbrev_info * | |
fe1b8b76 | 2266 | peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 2267 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
2268 | { |
2269 | bfd *abfd = cu->objfile->obfd; | |
2270 | unsigned int abbrev_number; | |
2271 | struct abbrev_info *abbrev; | |
2272 | ||
2273 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
2274 | ||
2275 | if (abbrev_number == 0) | |
2276 | return NULL; | |
2277 | ||
2278 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); | |
2279 | if (!abbrev) | |
2280 | { | |
8a3fe4f8 | 2281 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number, |
4bb7a0a7 DJ |
2282 | bfd_get_filename (abfd)); |
2283 | } | |
2284 | ||
2285 | return abbrev; | |
2286 | } | |
2287 | ||
2288 | /* Scan the debug information for CU starting at INFO_PTR. Returns a | |
2289 | pointer to the end of a series of DIEs, terminated by an empty | |
2290 | DIE. Any children of the skipped DIEs will also be skipped. */ | |
2291 | ||
fe1b8b76 JB |
2292 | static gdb_byte * |
2293 | skip_children (gdb_byte *info_ptr, struct dwarf2_cu *cu) | |
4bb7a0a7 DJ |
2294 | { |
2295 | struct abbrev_info *abbrev; | |
2296 | unsigned int bytes_read; | |
2297 | ||
2298 | while (1) | |
2299 | { | |
2300 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
2301 | if (abbrev == NULL) | |
2302 | return info_ptr + bytes_read; | |
2303 | else | |
2304 | info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu); | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR | |
2309 | should point just after the initial uleb128 of a DIE, and the | |
2310 | abbrev corresponding to that skipped uleb128 should be passed in | |
2311 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
2312 | children. */ | |
2313 | ||
fe1b8b76 JB |
2314 | static gdb_byte * |
2315 | skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev, | |
4bb7a0a7 DJ |
2316 | struct dwarf2_cu *cu) |
2317 | { | |
2318 | unsigned int bytes_read; | |
2319 | struct attribute attr; | |
2320 | bfd *abfd = cu->objfile->obfd; | |
2321 | unsigned int form, i; | |
2322 | ||
2323 | for (i = 0; i < abbrev->num_attrs; i++) | |
2324 | { | |
2325 | /* The only abbrev we care about is DW_AT_sibling. */ | |
2326 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
2327 | { | |
2328 | read_attribute (&attr, &abbrev->attrs[i], | |
2329 | abfd, info_ptr, cu); | |
2330 | if (attr.form == DW_FORM_ref_addr) | |
e2e0b3e5 | 2331 | complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 2332 | else |
6502dd73 DJ |
2333 | return dwarf2_per_objfile->info_buffer |
2334 | + dwarf2_get_ref_die_offset (&attr, cu); | |
4bb7a0a7 DJ |
2335 | } |
2336 | ||
2337 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
2338 | form = abbrev->attrs[i].form; | |
2339 | skip_attribute: | |
2340 | switch (form) | |
2341 | { | |
2342 | case DW_FORM_addr: | |
2343 | case DW_FORM_ref_addr: | |
2344 | info_ptr += cu->header.addr_size; | |
2345 | break; | |
2346 | case DW_FORM_data1: | |
2347 | case DW_FORM_ref1: | |
2348 | case DW_FORM_flag: | |
2349 | info_ptr += 1; | |
2350 | break; | |
2351 | case DW_FORM_data2: | |
2352 | case DW_FORM_ref2: | |
2353 | info_ptr += 2; | |
2354 | break; | |
2355 | case DW_FORM_data4: | |
2356 | case DW_FORM_ref4: | |
2357 | info_ptr += 4; | |
2358 | break; | |
2359 | case DW_FORM_data8: | |
2360 | case DW_FORM_ref8: | |
2361 | info_ptr += 8; | |
2362 | break; | |
2363 | case DW_FORM_string: | |
2364 | read_string (abfd, info_ptr, &bytes_read); | |
2365 | info_ptr += bytes_read; | |
2366 | break; | |
2367 | case DW_FORM_strp: | |
2368 | info_ptr += cu->header.offset_size; | |
2369 | break; | |
2370 | case DW_FORM_block: | |
2371 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
2372 | info_ptr += bytes_read; | |
2373 | break; | |
2374 | case DW_FORM_block1: | |
2375 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
2376 | break; | |
2377 | case DW_FORM_block2: | |
2378 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
2379 | break; | |
2380 | case DW_FORM_block4: | |
2381 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
2382 | break; | |
2383 | case DW_FORM_sdata: | |
2384 | case DW_FORM_udata: | |
2385 | case DW_FORM_ref_udata: | |
2386 | info_ptr = skip_leb128 (abfd, info_ptr); | |
2387 | break; | |
2388 | case DW_FORM_indirect: | |
2389 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
2390 | info_ptr += bytes_read; | |
2391 | /* We need to continue parsing from here, so just go back to | |
2392 | the top. */ | |
2393 | goto skip_attribute; | |
2394 | ||
2395 | default: | |
8a3fe4f8 | 2396 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
4bb7a0a7 DJ |
2397 | dwarf_form_name (form), |
2398 | bfd_get_filename (abfd)); | |
2399 | } | |
2400 | } | |
2401 | ||
2402 | if (abbrev->has_children) | |
2403 | return skip_children (info_ptr, cu); | |
2404 | else | |
2405 | return info_ptr; | |
2406 | } | |
2407 | ||
2408 | /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of | |
2409 | the next DIE after ORIG_PDI. */ | |
91c24f0a | 2410 | |
fe1b8b76 JB |
2411 | static gdb_byte * |
2412 | locate_pdi_sibling (struct partial_die_info *orig_pdi, gdb_byte *info_ptr, | |
e7c27a73 | 2413 | bfd *abfd, struct dwarf2_cu *cu) |
91c24f0a DC |
2414 | { |
2415 | /* Do we know the sibling already? */ | |
72bf9492 | 2416 | |
91c24f0a DC |
2417 | if (orig_pdi->sibling) |
2418 | return orig_pdi->sibling; | |
2419 | ||
2420 | /* Are there any children to deal with? */ | |
2421 | ||
2422 | if (!orig_pdi->has_children) | |
2423 | return info_ptr; | |
2424 | ||
4bb7a0a7 | 2425 | /* Skip the children the long way. */ |
91c24f0a | 2426 | |
4bb7a0a7 | 2427 | return skip_children (info_ptr, cu); |
91c24f0a DC |
2428 | } |
2429 | ||
c906108c SS |
2430 | /* Expand this partial symbol table into a full symbol table. */ |
2431 | ||
2432 | static void | |
fba45db2 | 2433 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2434 | { |
2435 | /* FIXME: This is barely more than a stub. */ | |
2436 | if (pst != NULL) | |
2437 | { | |
2438 | if (pst->readin) | |
2439 | { | |
8a3fe4f8 | 2440 | warning (_("bug: psymtab for %s is already read in."), pst->filename); |
c906108c SS |
2441 | } |
2442 | else | |
2443 | { | |
2444 | if (info_verbose) | |
2445 | { | |
a3f17187 | 2446 | printf_filtered (_("Reading in symbols for %s..."), pst->filename); |
c906108c SS |
2447 | gdb_flush (gdb_stdout); |
2448 | } | |
2449 | ||
10b3939b DJ |
2450 | /* Restore our global data. */ |
2451 | dwarf2_per_objfile = objfile_data (pst->objfile, | |
2452 | dwarf2_objfile_data_key); | |
2453 | ||
c906108c SS |
2454 | psymtab_to_symtab_1 (pst); |
2455 | ||
2456 | /* Finish up the debug error message. */ | |
2457 | if (info_verbose) | |
a3f17187 | 2458 | printf_filtered (_("done.\n")); |
c906108c SS |
2459 | } |
2460 | } | |
2461 | } | |
2462 | ||
10b3939b DJ |
2463 | /* Add PER_CU to the queue. */ |
2464 | ||
2465 | static void | |
03dd20cc | 2466 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile) |
10b3939b DJ |
2467 | { |
2468 | struct dwarf2_queue_item *item; | |
2469 | ||
2470 | per_cu->queued = 1; | |
2471 | item = xmalloc (sizeof (*item)); | |
2472 | item->per_cu = per_cu; | |
2473 | item->next = NULL; | |
2474 | ||
2475 | if (dwarf2_queue == NULL) | |
2476 | dwarf2_queue = item; | |
2477 | else | |
2478 | dwarf2_queue_tail->next = item; | |
2479 | ||
2480 | dwarf2_queue_tail = item; | |
03dd20cc DJ |
2481 | |
2482 | /* Either PER_CU is the CU we want to process, or we're following a reference | |
2483 | pointing into PER_CU. Either way, we need its DIEs now. */ | |
2484 | load_full_comp_unit (item->per_cu, objfile); | |
2485 | item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
2486 | dwarf2_per_objfile->read_in_chain = item->per_cu; | |
10b3939b DJ |
2487 | } |
2488 | ||
2489 | /* Process the queue. */ | |
2490 | ||
2491 | static void | |
2492 | process_queue (struct objfile *objfile) | |
2493 | { | |
2494 | struct dwarf2_queue_item *item, *next_item; | |
2495 | ||
03dd20cc DJ |
2496 | /* The queue starts out with one item, but following a DIE reference |
2497 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
2498 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
2499 | { | |
31ffec48 | 2500 | if (item->per_cu->psymtab && !item->per_cu->psymtab->readin) |
10b3939b DJ |
2501 | process_full_comp_unit (item->per_cu); |
2502 | ||
2503 | item->per_cu->queued = 0; | |
2504 | next_item = item->next; | |
2505 | xfree (item); | |
2506 | } | |
2507 | ||
2508 | dwarf2_queue_tail = NULL; | |
2509 | } | |
2510 | ||
2511 | /* Free all allocated queue entries. This function only releases anything if | |
2512 | an error was thrown; if the queue was processed then it would have been | |
2513 | freed as we went along. */ | |
2514 | ||
2515 | static void | |
2516 | dwarf2_release_queue (void *dummy) | |
2517 | { | |
2518 | struct dwarf2_queue_item *item, *last; | |
2519 | ||
2520 | item = dwarf2_queue; | |
2521 | while (item) | |
2522 | { | |
2523 | /* Anything still marked queued is likely to be in an | |
2524 | inconsistent state, so discard it. */ | |
2525 | if (item->per_cu->queued) | |
2526 | { | |
2527 | if (item->per_cu->cu != NULL) | |
2528 | free_one_cached_comp_unit (item->per_cu->cu); | |
2529 | item->per_cu->queued = 0; | |
2530 | } | |
2531 | ||
2532 | last = item; | |
2533 | item = item->next; | |
2534 | xfree (last); | |
2535 | } | |
2536 | ||
2537 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
2538 | } | |
2539 | ||
2540 | /* Read in full symbols for PST, and anything it depends on. */ | |
2541 | ||
c906108c | 2542 | static void |
fba45db2 | 2543 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2544 | { |
10b3939b | 2545 | struct dwarf2_per_cu_data *per_cu; |
c906108c | 2546 | struct cleanup *back_to; |
aaa75496 JB |
2547 | int i; |
2548 | ||
2549 | for (i = 0; i < pst->number_of_dependencies; i++) | |
2550 | if (!pst->dependencies[i]->readin) | |
2551 | { | |
2552 | /* Inform about additional files that need to be read in. */ | |
2553 | if (info_verbose) | |
2554 | { | |
a3f17187 | 2555 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
2556 | fputs_filtered (" ", gdb_stdout); |
2557 | wrap_here (""); | |
2558 | fputs_filtered ("and ", gdb_stdout); | |
2559 | wrap_here (""); | |
2560 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
2561 | wrap_here (""); /* Flush output */ | |
2562 | gdb_flush (gdb_stdout); | |
2563 | } | |
2564 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
2565 | } | |
2566 | ||
10b3939b DJ |
2567 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
2568 | ||
2569 | if (per_cu == NULL) | |
aaa75496 JB |
2570 | { |
2571 | /* It's an include file, no symbols to read for it. | |
2572 | Everything is in the parent symtab. */ | |
2573 | pst->readin = 1; | |
2574 | return; | |
2575 | } | |
c906108c | 2576 | |
10b3939b DJ |
2577 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2578 | ||
03dd20cc | 2579 | queue_comp_unit (per_cu, pst->objfile); |
10b3939b DJ |
2580 | |
2581 | process_queue (pst->objfile); | |
2582 | ||
2583 | /* Age the cache, releasing compilation units that have not | |
2584 | been used recently. */ | |
2585 | age_cached_comp_units (); | |
2586 | ||
2587 | do_cleanups (back_to); | |
2588 | } | |
2589 | ||
2590 | /* Load the DIEs associated with PST and PER_CU into memory. */ | |
2591 | ||
2592 | static struct dwarf2_cu * | |
31ffec48 | 2593 | load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile) |
10b3939b | 2594 | { |
31ffec48 | 2595 | bfd *abfd = objfile->obfd; |
10b3939b DJ |
2596 | struct dwarf2_cu *cu; |
2597 | unsigned long offset; | |
fe1b8b76 | 2598 | gdb_byte *info_ptr; |
10b3939b DJ |
2599 | struct cleanup *back_to, *free_cu_cleanup; |
2600 | struct attribute *attr; | |
2601 | CORE_ADDR baseaddr; | |
6502dd73 | 2602 | |
c906108c | 2603 | /* Set local variables from the partial symbol table info. */ |
10b3939b | 2604 | offset = per_cu->offset; |
6502dd73 DJ |
2605 | |
2606 | info_ptr = dwarf2_per_objfile->info_buffer + offset; | |
63d06c5c | 2607 | |
10b3939b DJ |
2608 | cu = xmalloc (sizeof (struct dwarf2_cu)); |
2609 | memset (cu, 0, sizeof (struct dwarf2_cu)); | |
c906108c | 2610 | |
10b3939b DJ |
2611 | /* If an error occurs while loading, release our storage. */ |
2612 | free_cu_cleanup = make_cleanup (free_one_comp_unit, cu); | |
c906108c | 2613 | |
31ffec48 | 2614 | cu->objfile = objfile; |
e7c27a73 | 2615 | |
c906108c | 2616 | /* read in the comp_unit header */ |
10b3939b | 2617 | info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd); |
c906108c SS |
2618 | |
2619 | /* Read the abbrevs for this compilation unit */ | |
10b3939b DJ |
2620 | dwarf2_read_abbrevs (abfd, cu); |
2621 | back_to = make_cleanup (dwarf2_free_abbrev_table, cu); | |
2622 | ||
2623 | cu->header.offset = offset; | |
c906108c | 2624 | |
10b3939b DJ |
2625 | cu->per_cu = per_cu; |
2626 | per_cu->cu = cu; | |
f792889a | 2627 | cu->type_hash = per_cu->type_hash; |
e142c38c | 2628 | |
10b3939b DJ |
2629 | /* We use this obstack for block values in dwarf_alloc_block. */ |
2630 | obstack_init (&cu->comp_unit_obstack); | |
2631 | ||
2632 | cu->dies = read_comp_unit (info_ptr, abfd, cu); | |
2633 | ||
2634 | /* We try not to read any attributes in this function, because not | |
2635 | all objfiles needed for references have been loaded yet, and symbol | |
2636 | table processing isn't initialized. But we have to set the CU language, | |
2637 | or we won't be able to build types correctly. */ | |
2638 | attr = dwarf2_attr (cu->dies, DW_AT_language, cu); | |
2639 | if (attr) | |
2640 | set_cu_language (DW_UNSND (attr), cu); | |
2641 | else | |
2642 | set_cu_language (language_minimal, cu); | |
2643 | ||
2644 | do_cleanups (back_to); | |
e142c38c | 2645 | |
10b3939b DJ |
2646 | /* We've successfully allocated this compilation unit. Let our caller |
2647 | clean it up when finished with it. */ | |
2648 | discard_cleanups (free_cu_cleanup); | |
c906108c | 2649 | |
10b3939b DJ |
2650 | return cu; |
2651 | } | |
2652 | ||
2653 | /* Generate full symbol information for PST and CU, whose DIEs have | |
2654 | already been loaded into memory. */ | |
2655 | ||
2656 | static void | |
2657 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu) | |
2658 | { | |
2659 | struct partial_symtab *pst = per_cu->psymtab; | |
2660 | struct dwarf2_cu *cu = per_cu->cu; | |
2661 | struct objfile *objfile = pst->objfile; | |
2662 | bfd *abfd = objfile->obfd; | |
2663 | CORE_ADDR lowpc, highpc; | |
2664 | struct symtab *symtab; | |
2665 | struct cleanup *back_to; | |
2666 | struct attribute *attr; | |
2667 | CORE_ADDR baseaddr; | |
2668 | ||
2669 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2670 | ||
10b3939b DJ |
2671 | buildsym_init (); |
2672 | back_to = make_cleanup (really_free_pendings, NULL); | |
2673 | ||
2674 | cu->list_in_scope = &file_symbols; | |
c906108c | 2675 | |
0d53c4c4 DJ |
2676 | /* Find the base address of the compilation unit for range lists and |
2677 | location lists. It will normally be specified by DW_AT_low_pc. | |
2678 | In DWARF-3 draft 4, the base address could be overridden by | |
2679 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
2680 | compilation units with discontinuous ranges. */ | |
2681 | ||
d00adf39 DE |
2682 | cu->base_known = 0; |
2683 | cu->base_address = 0; | |
0d53c4c4 | 2684 | |
10b3939b | 2685 | attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu); |
0d53c4c4 DJ |
2686 | if (attr) |
2687 | { | |
d00adf39 DE |
2688 | cu->base_address = DW_ADDR (attr); |
2689 | cu->base_known = 1; | |
0d53c4c4 DJ |
2690 | } |
2691 | else | |
2692 | { | |
10b3939b | 2693 | attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu); |
0d53c4c4 DJ |
2694 | if (attr) |
2695 | { | |
d00adf39 DE |
2696 | cu->base_address = DW_ADDR (attr); |
2697 | cu->base_known = 1; | |
0d53c4c4 DJ |
2698 | } |
2699 | } | |
2700 | ||
c906108c | 2701 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 2702 | process_die (cu->dies, cu); |
c906108c | 2703 | |
fae299cd DC |
2704 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
2705 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
2706 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 2707 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 2708 | |
613e1657 | 2709 | symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); |
c906108c SS |
2710 | |
2711 | /* Set symtab language to language from DW_AT_language. | |
2712 | If the compilation is from a C file generated by language preprocessors, | |
2713 | do not set the language if it was already deduced by start_subfile. */ | |
2714 | if (symtab != NULL | |
10b3939b | 2715 | && !(cu->language == language_c && symtab->language != language_c)) |
c906108c | 2716 | { |
10b3939b | 2717 | symtab->language = cu->language; |
c906108c SS |
2718 | } |
2719 | pst->symtab = symtab; | |
2720 | pst->readin = 1; | |
c906108c SS |
2721 | |
2722 | do_cleanups (back_to); | |
2723 | } | |
2724 | ||
2725 | /* Process a die and its children. */ | |
2726 | ||
2727 | static void | |
e7c27a73 | 2728 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
2729 | { |
2730 | switch (die->tag) | |
2731 | { | |
2732 | case DW_TAG_padding: | |
2733 | break; | |
2734 | case DW_TAG_compile_unit: | |
e7c27a73 | 2735 | read_file_scope (die, cu); |
c906108c SS |
2736 | break; |
2737 | case DW_TAG_subprogram: | |
e7c27a73 | 2738 | read_func_scope (die, cu); |
c906108c SS |
2739 | break; |
2740 | case DW_TAG_inlined_subroutine: | |
2741 | /* FIXME: These are ignored for now. | |
c5aa993b JM |
2742 | They could be used to set breakpoints on all inlined instances |
2743 | of a function and make GDB `next' properly over inlined functions. */ | |
c906108c SS |
2744 | break; |
2745 | case DW_TAG_lexical_block: | |
14898363 L |
2746 | case DW_TAG_try_block: |
2747 | case DW_TAG_catch_block: | |
e7c27a73 | 2748 | read_lexical_block_scope (die, cu); |
c906108c SS |
2749 | break; |
2750 | case DW_TAG_class_type: | |
680b30c7 | 2751 | case DW_TAG_interface_type: |
c906108c SS |
2752 | case DW_TAG_structure_type: |
2753 | case DW_TAG_union_type: | |
134d01f1 | 2754 | process_structure_scope (die, cu); |
c906108c SS |
2755 | break; |
2756 | case DW_TAG_enumeration_type: | |
134d01f1 | 2757 | process_enumeration_scope (die, cu); |
c906108c | 2758 | break; |
134d01f1 | 2759 | |
f792889a DJ |
2760 | /* These dies have a type, but processing them does not create |
2761 | a symbol or recurse to process the children. Therefore we can | |
2762 | read them on-demand through read_type_die. */ | |
c906108c | 2763 | case DW_TAG_subroutine_type: |
72019c9c | 2764 | case DW_TAG_set_type: |
c906108c | 2765 | case DW_TAG_array_type: |
c906108c | 2766 | case DW_TAG_pointer_type: |
c906108c | 2767 | case DW_TAG_ptr_to_member_type: |
c906108c | 2768 | case DW_TAG_reference_type: |
c906108c | 2769 | case DW_TAG_string_type: |
c906108c | 2770 | break; |
134d01f1 | 2771 | |
c906108c | 2772 | case DW_TAG_base_type: |
a02abb62 | 2773 | case DW_TAG_subrange_type: |
134d01f1 DJ |
2774 | /* Add a typedef symbol for the type definition, if it has a |
2775 | DW_AT_name. */ | |
f792889a | 2776 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 2777 | break; |
c906108c | 2778 | case DW_TAG_common_block: |
e7c27a73 | 2779 | read_common_block (die, cu); |
c906108c SS |
2780 | break; |
2781 | case DW_TAG_common_inclusion: | |
2782 | break; | |
d9fa45fe | 2783 | case DW_TAG_namespace: |
63d06c5c | 2784 | processing_has_namespace_info = 1; |
e7c27a73 | 2785 | read_namespace (die, cu); |
d9fa45fe DC |
2786 | break; |
2787 | case DW_TAG_imported_declaration: | |
2788 | case DW_TAG_imported_module: | |
2789 | /* FIXME: carlton/2002-10-16: Eventually, we should use the | |
2790 | information contained in these. DW_TAG_imported_declaration | |
2791 | dies shouldn't have children; DW_TAG_imported_module dies | |
2792 | shouldn't in the C++ case, but conceivably could in the | |
d68209e4 | 2793 | Fortran case. */ |
63d06c5c | 2794 | processing_has_namespace_info = 1; |
d68209e4 JK |
2795 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
2796 | dwarf_tag_name (die->tag)); | |
d9fa45fe | 2797 | break; |
c906108c | 2798 | default: |
e7c27a73 | 2799 | new_symbol (die, NULL, cu); |
c906108c SS |
2800 | break; |
2801 | } | |
2802 | } | |
2803 | ||
0114d602 DJ |
2804 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
2805 | If scope qualifiers are appropriate they will be added. The result | |
2806 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
2807 | not have a name. */ | |
2808 | ||
2809 | static const char * | |
2810 | dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu) | |
2811 | { | |
2812 | struct attribute *attr; | |
2813 | char *prefix, *name; | |
2814 | struct ui_file *buf = NULL; | |
2815 | ||
2816 | name = dwarf2_name (die, cu); | |
2817 | if (!name) | |
2818 | return NULL; | |
2819 | ||
2820 | /* These are the only languages we know how to qualify names in. */ | |
2821 | if (cu->language != language_cplus | |
2822 | && cu->language != language_java) | |
2823 | return name; | |
2824 | ||
2825 | /* If no prefix is necessary for this type of DIE, return the | |
2826 | unqualified name. The other three tags listed could be handled | |
2827 | in pdi_needs_namespace, but that requires broader changes. */ | |
2828 | if (!pdi_needs_namespace (die->tag) | |
2829 | && die->tag != DW_TAG_subprogram | |
2830 | && die->tag != DW_TAG_variable | |
2831 | && die->tag != DW_TAG_member) | |
2832 | return name; | |
2833 | ||
2834 | prefix = determine_prefix (die, cu); | |
2835 | if (*prefix != '\0') | |
2836 | name = typename_concat (&cu->objfile->objfile_obstack, prefix, | |
2837 | name, cu); | |
2838 | ||
2839 | return name; | |
2840 | } | |
2841 | ||
5fb290d7 | 2842 | static void |
e142c38c | 2843 | initialize_cu_func_list (struct dwarf2_cu *cu) |
5fb290d7 | 2844 | { |
e142c38c | 2845 | cu->first_fn = cu->last_fn = cu->cached_fn = NULL; |
5fb290d7 DJ |
2846 | } |
2847 | ||
cb1df416 DJ |
2848 | static void |
2849 | free_cu_line_header (void *arg) | |
2850 | { | |
2851 | struct dwarf2_cu *cu = arg; | |
2852 | ||
2853 | free_line_header (cu->line_header); | |
2854 | cu->line_header = NULL; | |
2855 | } | |
2856 | ||
c906108c | 2857 | static void |
e7c27a73 | 2858 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 2859 | { |
e7c27a73 DJ |
2860 | struct objfile *objfile = cu->objfile; |
2861 | struct comp_unit_head *cu_header = &cu->header; | |
debd256d | 2862 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 2863 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
2864 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
2865 | struct attribute *attr; | |
e1024ff1 | 2866 | char *name = NULL; |
c906108c SS |
2867 | char *comp_dir = NULL; |
2868 | struct die_info *child_die; | |
2869 | bfd *abfd = objfile->obfd; | |
debd256d | 2870 | struct line_header *line_header = 0; |
e142c38c DJ |
2871 | CORE_ADDR baseaddr; |
2872 | ||
2873 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 2874 | |
fae299cd | 2875 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
2876 | |
2877 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
2878 | from finish_block. */ | |
2acceee2 | 2879 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
2880 | lowpc = highpc; |
2881 | lowpc += baseaddr; | |
2882 | highpc += baseaddr; | |
2883 | ||
39cbfefa DJ |
2884 | /* Find the filename. Do not use dwarf2_name here, since the filename |
2885 | is not a source language identifier. */ | |
e142c38c | 2886 | attr = dwarf2_attr (die, DW_AT_name, cu); |
c906108c SS |
2887 | if (attr) |
2888 | { | |
2889 | name = DW_STRING (attr); | |
2890 | } | |
e1024ff1 | 2891 | |
e142c38c | 2892 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); |
c906108c | 2893 | if (attr) |
e1024ff1 DJ |
2894 | comp_dir = DW_STRING (attr); |
2895 | else if (name != NULL && IS_ABSOLUTE_PATH (name)) | |
c906108c | 2896 | { |
e1024ff1 DJ |
2897 | comp_dir = ldirname (name); |
2898 | if (comp_dir != NULL) | |
2899 | make_cleanup (xfree, comp_dir); | |
2900 | } | |
2901 | if (comp_dir != NULL) | |
2902 | { | |
2903 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
2904 | directory, get rid of it. */ | |
2905 | char *cp = strchr (comp_dir, ':'); | |
c906108c | 2906 | |
e1024ff1 DJ |
2907 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') |
2908 | comp_dir = cp + 1; | |
c906108c SS |
2909 | } |
2910 | ||
e1024ff1 DJ |
2911 | if (name == NULL) |
2912 | name = "<unknown>"; | |
2913 | ||
e142c38c | 2914 | attr = dwarf2_attr (die, DW_AT_language, cu); |
c906108c SS |
2915 | if (attr) |
2916 | { | |
e142c38c | 2917 | set_cu_language (DW_UNSND (attr), cu); |
c906108c SS |
2918 | } |
2919 | ||
b0f35d58 DL |
2920 | attr = dwarf2_attr (die, DW_AT_producer, cu); |
2921 | if (attr) | |
2922 | cu->producer = DW_STRING (attr); | |
303b6f5d | 2923 | |
c906108c SS |
2924 | /* We assume that we're processing GCC output. */ |
2925 | processing_gcc_compilation = 2; | |
c906108c | 2926 | |
df8a16a1 DJ |
2927 | processing_has_namespace_info = 0; |
2928 | ||
c906108c SS |
2929 | start_symtab (name, comp_dir, lowpc); |
2930 | record_debugformat ("DWARF 2"); | |
303b6f5d | 2931 | record_producer (cu->producer); |
c906108c | 2932 | |
e142c38c | 2933 | initialize_cu_func_list (cu); |
c906108c | 2934 | |
cb1df416 DJ |
2935 | /* Decode line number information if present. We do this before |
2936 | processing child DIEs, so that the line header table is available | |
2937 | for DW_AT_decl_file. */ | |
e142c38c | 2938 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5fb290d7 DJ |
2939 | if (attr) |
2940 | { | |
debd256d | 2941 | unsigned int line_offset = DW_UNSND (attr); |
e7c27a73 | 2942 | line_header = dwarf_decode_line_header (line_offset, abfd, cu); |
debd256d JB |
2943 | if (line_header) |
2944 | { | |
cb1df416 DJ |
2945 | cu->line_header = line_header; |
2946 | make_cleanup (free_cu_line_header, cu); | |
aaa75496 | 2947 | dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL); |
debd256d | 2948 | } |
5fb290d7 | 2949 | } |
debd256d | 2950 | |
cb1df416 DJ |
2951 | /* Process all dies in compilation unit. */ |
2952 | if (die->child != NULL) | |
2953 | { | |
2954 | child_die = die->child; | |
2955 | while (child_die && child_die->tag) | |
2956 | { | |
2957 | process_die (child_die, cu); | |
2958 | child_die = sibling_die (child_die); | |
2959 | } | |
2960 | } | |
2961 | ||
2e276125 JB |
2962 | /* Decode macro information, if present. Dwarf 2 macro information |
2963 | refers to information in the line number info statement program | |
2964 | header, so we can only read it if we've read the header | |
2965 | successfully. */ | |
e142c38c | 2966 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); |
41ff2da1 | 2967 | if (attr && line_header) |
2e276125 JB |
2968 | { |
2969 | unsigned int macro_offset = DW_UNSND (attr); | |
2970 | dwarf_decode_macros (line_header, macro_offset, | |
e7c27a73 | 2971 | comp_dir, abfd, cu); |
2e276125 | 2972 | } |
debd256d | 2973 | do_cleanups (back_to); |
5fb290d7 DJ |
2974 | } |
2975 | ||
2976 | static void | |
e142c38c DJ |
2977 | add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc, |
2978 | struct dwarf2_cu *cu) | |
5fb290d7 DJ |
2979 | { |
2980 | struct function_range *thisfn; | |
2981 | ||
2982 | thisfn = (struct function_range *) | |
7b5a2f43 | 2983 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range)); |
5fb290d7 DJ |
2984 | thisfn->name = name; |
2985 | thisfn->lowpc = lowpc; | |
2986 | thisfn->highpc = highpc; | |
2987 | thisfn->seen_line = 0; | |
2988 | thisfn->next = NULL; | |
2989 | ||
e142c38c DJ |
2990 | if (cu->last_fn == NULL) |
2991 | cu->first_fn = thisfn; | |
5fb290d7 | 2992 | else |
e142c38c | 2993 | cu->last_fn->next = thisfn; |
5fb290d7 | 2994 | |
e142c38c | 2995 | cu->last_fn = thisfn; |
c906108c SS |
2996 | } |
2997 | ||
2998 | static void | |
e7c27a73 | 2999 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 3000 | { |
e7c27a73 | 3001 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 3002 | struct context_stack *new; |
c906108c SS |
3003 | CORE_ADDR lowpc; |
3004 | CORE_ADDR highpc; | |
3005 | struct die_info *child_die; | |
3006 | struct attribute *attr; | |
3007 | char *name; | |
e142c38c | 3008 | CORE_ADDR baseaddr; |
801e3a5b | 3009 | struct block *block; |
c906108c | 3010 | |
e142c38c DJ |
3011 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
3012 | ||
3013 | name = dwarf2_linkage_name (die, cu); | |
c906108c SS |
3014 | |
3015 | /* Ignore functions with missing or empty names and functions with | |
3016 | missing or invalid low and high pc attributes. */ | |
e7c27a73 | 3017 | if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
c906108c SS |
3018 | return; |
3019 | ||
3020 | lowpc += baseaddr; | |
3021 | highpc += baseaddr; | |
3022 | ||
5fb290d7 | 3023 | /* Record the function range for dwarf_decode_lines. */ |
e142c38c | 3024 | add_to_cu_func_list (name, lowpc, highpc, cu); |
5fb290d7 | 3025 | |
c906108c | 3026 | new = push_context (0, lowpc); |
f792889a | 3027 | new->name = new_symbol (die, read_type_die (die, cu), cu); |
4c2df51b | 3028 | |
4cecd739 DJ |
3029 | /* If there is a location expression for DW_AT_frame_base, record |
3030 | it. */ | |
e142c38c | 3031 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 3032 | if (attr) |
c034e007 AC |
3033 | /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location |
3034 | expression is being recorded directly in the function's symbol | |
3035 | and not in a separate frame-base object. I guess this hack is | |
3036 | to avoid adding some sort of frame-base adjunct/annex to the | |
3037 | function's symbol :-(. The problem with doing this is that it | |
3038 | results in a function symbol with a location expression that | |
3039 | has nothing to do with the location of the function, ouch! The | |
3040 | relationship should be: a function's symbol has-a frame base; a | |
3041 | frame-base has-a location expression. */ | |
e7c27a73 | 3042 | dwarf2_symbol_mark_computed (attr, new->name, cu); |
4c2df51b | 3043 | |
e142c38c | 3044 | cu->list_in_scope = &local_symbols; |
c906108c | 3045 | |
639d11d3 | 3046 | if (die->child != NULL) |
c906108c | 3047 | { |
639d11d3 | 3048 | child_die = die->child; |
c906108c SS |
3049 | while (child_die && child_die->tag) |
3050 | { | |
e7c27a73 | 3051 | process_die (child_die, cu); |
c906108c SS |
3052 | child_die = sibling_die (child_die); |
3053 | } | |
3054 | } | |
3055 | ||
3056 | new = pop_context (); | |
3057 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
3058 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
3059 | lowpc, highpc, objfile); | |
3060 | ||
df8a16a1 DJ |
3061 | /* For C++, set the block's scope. */ |
3062 | if (cu->language == language_cplus) | |
3063 | cp_set_block_scope (new->name, block, &objfile->objfile_obstack, | |
0114d602 | 3064 | determine_prefix (die, cu), |
df8a16a1 DJ |
3065 | processing_has_namespace_info); |
3066 | ||
801e3a5b JB |
3067 | /* If we have address ranges, record them. */ |
3068 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
208d8187 JB |
3069 | |
3070 | /* In C++, we can have functions nested inside functions (e.g., when | |
3071 | a function declares a class that has methods). This means that | |
3072 | when we finish processing a function scope, we may need to go | |
3073 | back to building a containing block's symbol lists. */ | |
3074 | local_symbols = new->locals; | |
3075 | param_symbols = new->params; | |
3076 | ||
921e78cf JB |
3077 | /* If we've finished processing a top-level function, subsequent |
3078 | symbols go in the file symbol list. */ | |
3079 | if (outermost_context_p ()) | |
e142c38c | 3080 | cu->list_in_scope = &file_symbols; |
c906108c SS |
3081 | } |
3082 | ||
3083 | /* Process all the DIES contained within a lexical block scope. Start | |
3084 | a new scope, process the dies, and then close the scope. */ | |
3085 | ||
3086 | static void | |
e7c27a73 | 3087 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 3088 | { |
e7c27a73 | 3089 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 3090 | struct context_stack *new; |
c906108c SS |
3091 | CORE_ADDR lowpc, highpc; |
3092 | struct die_info *child_die; | |
e142c38c DJ |
3093 | CORE_ADDR baseaddr; |
3094 | ||
3095 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
3096 | |
3097 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
3098 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
3099 | as multiple lexical blocks? Handling children in a sane way would | |
3100 | be nasty. Might be easier to properly extend generic blocks to | |
3101 | describe ranges. */ | |
e7c27a73 | 3102 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
c906108c SS |
3103 | return; |
3104 | lowpc += baseaddr; | |
3105 | highpc += baseaddr; | |
3106 | ||
3107 | push_context (0, lowpc); | |
639d11d3 | 3108 | if (die->child != NULL) |
c906108c | 3109 | { |
639d11d3 | 3110 | child_die = die->child; |
c906108c SS |
3111 | while (child_die && child_die->tag) |
3112 | { | |
e7c27a73 | 3113 | process_die (child_die, cu); |
c906108c SS |
3114 | child_die = sibling_die (child_die); |
3115 | } | |
3116 | } | |
3117 | new = pop_context (); | |
3118 | ||
3119 | if (local_symbols != NULL) | |
3120 | { | |
801e3a5b JB |
3121 | struct block *block |
3122 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
3123 | highpc, objfile); | |
3124 | ||
3125 | /* Note that recording ranges after traversing children, as we | |
3126 | do here, means that recording a parent's ranges entails | |
3127 | walking across all its children's ranges as they appear in | |
3128 | the address map, which is quadratic behavior. | |
3129 | ||
3130 | It would be nicer to record the parent's ranges before | |
3131 | traversing its children, simply overriding whatever you find | |
3132 | there. But since we don't even decide whether to create a | |
3133 | block until after we've traversed its children, that's hard | |
3134 | to do. */ | |
3135 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
3136 | } |
3137 | local_symbols = new->locals; | |
3138 | } | |
3139 | ||
43039443 | 3140 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
3141 | Return 1 if the attributes are present and valid, otherwise, return 0. |
3142 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
3143 | |
3144 | static int | |
3145 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
3146 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
3147 | struct partial_symtab *ranges_pst) | |
43039443 JK |
3148 | { |
3149 | struct objfile *objfile = cu->objfile; | |
3150 | struct comp_unit_head *cu_header = &cu->header; | |
3151 | bfd *obfd = objfile->obfd; | |
3152 | unsigned int addr_size = cu_header->addr_size; | |
3153 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
3154 | /* Base address selection entry. */ | |
3155 | CORE_ADDR base; | |
3156 | int found_base; | |
3157 | unsigned int dummy; | |
3158 | gdb_byte *buffer; | |
3159 | CORE_ADDR marker; | |
3160 | int low_set; | |
3161 | CORE_ADDR low = 0; | |
3162 | CORE_ADDR high = 0; | |
ff013f42 | 3163 | CORE_ADDR baseaddr; |
43039443 | 3164 | |
d00adf39 DE |
3165 | found_base = cu->base_known; |
3166 | base = cu->base_address; | |
43039443 JK |
3167 | |
3168 | if (offset >= dwarf2_per_objfile->ranges_size) | |
3169 | { | |
3170 | complaint (&symfile_complaints, | |
3171 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
3172 | offset); | |
3173 | return 0; | |
3174 | } | |
3175 | buffer = dwarf2_per_objfile->ranges_buffer + offset; | |
3176 | ||
3177 | /* Read in the largest possible address. */ | |
3178 | marker = read_address (obfd, buffer, cu, &dummy); | |
3179 | if ((marker & mask) == mask) | |
3180 | { | |
3181 | /* If we found the largest possible address, then | |
3182 | read the base address. */ | |
3183 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
3184 | buffer += 2 * addr_size; | |
3185 | offset += 2 * addr_size; | |
3186 | found_base = 1; | |
3187 | } | |
3188 | ||
3189 | low_set = 0; | |
3190 | ||
e7030f15 | 3191 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 3192 | |
43039443 JK |
3193 | while (1) |
3194 | { | |
3195 | CORE_ADDR range_beginning, range_end; | |
3196 | ||
3197 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
3198 | buffer += addr_size; | |
3199 | range_end = read_address (obfd, buffer, cu, &dummy); | |
3200 | buffer += addr_size; | |
3201 | offset += 2 * addr_size; | |
3202 | ||
3203 | /* An end of list marker is a pair of zero addresses. */ | |
3204 | if (range_beginning == 0 && range_end == 0) | |
3205 | /* Found the end of list entry. */ | |
3206 | break; | |
3207 | ||
3208 | /* Each base address selection entry is a pair of 2 values. | |
3209 | The first is the largest possible address, the second is | |
3210 | the base address. Check for a base address here. */ | |
3211 | if ((range_beginning & mask) == mask) | |
3212 | { | |
3213 | /* If we found the largest possible address, then | |
3214 | read the base address. */ | |
3215 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
3216 | found_base = 1; | |
3217 | continue; | |
3218 | } | |
3219 | ||
3220 | if (!found_base) | |
3221 | { | |
3222 | /* We have no valid base address for the ranges | |
3223 | data. */ | |
3224 | complaint (&symfile_complaints, | |
3225 | _("Invalid .debug_ranges data (no base address)")); | |
3226 | return 0; | |
3227 | } | |
3228 | ||
3229 | range_beginning += base; | |
3230 | range_end += base; | |
3231 | ||
ff013f42 JK |
3232 | if (ranges_pst != NULL && range_beginning < range_end) |
3233 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3234 | range_beginning + baseaddr, range_end - 1 + baseaddr, | |
3235 | ranges_pst); | |
3236 | ||
43039443 JK |
3237 | /* FIXME: This is recording everything as a low-high |
3238 | segment of consecutive addresses. We should have a | |
3239 | data structure for discontiguous block ranges | |
3240 | instead. */ | |
3241 | if (! low_set) | |
3242 | { | |
3243 | low = range_beginning; | |
3244 | high = range_end; | |
3245 | low_set = 1; | |
3246 | } | |
3247 | else | |
3248 | { | |
3249 | if (range_beginning < low) | |
3250 | low = range_beginning; | |
3251 | if (range_end > high) | |
3252 | high = range_end; | |
3253 | } | |
3254 | } | |
3255 | ||
3256 | if (! low_set) | |
3257 | /* If the first entry is an end-of-list marker, the range | |
3258 | describes an empty scope, i.e. no instructions. */ | |
3259 | return 0; | |
3260 | ||
3261 | if (low_return) | |
3262 | *low_return = low; | |
3263 | if (high_return) | |
3264 | *high_return = high; | |
3265 | return 1; | |
3266 | } | |
3267 | ||
af34e669 DJ |
3268 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
3269 | are present and valid, otherwise, return 0. Return -1 if the range is | |
3270 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
c906108c | 3271 | static int |
af34e669 | 3272 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
e7c27a73 | 3273 | CORE_ADDR *highpc, struct dwarf2_cu *cu) |
c906108c SS |
3274 | { |
3275 | struct attribute *attr; | |
af34e669 DJ |
3276 | CORE_ADDR low = 0; |
3277 | CORE_ADDR high = 0; | |
3278 | int ret = 0; | |
c906108c | 3279 | |
e142c38c | 3280 | attr = dwarf2_attr (die, DW_AT_high_pc, cu); |
c906108c | 3281 | if (attr) |
af34e669 DJ |
3282 | { |
3283 | high = DW_ADDR (attr); | |
e142c38c | 3284 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 DJ |
3285 | if (attr) |
3286 | low = DW_ADDR (attr); | |
3287 | else | |
3288 | /* Found high w/o low attribute. */ | |
3289 | return 0; | |
3290 | ||
3291 | /* Found consecutive range of addresses. */ | |
3292 | ret = 1; | |
3293 | } | |
c906108c | 3294 | else |
af34e669 | 3295 | { |
e142c38c | 3296 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
3297 | if (attr != NULL) |
3298 | { | |
af34e669 | 3299 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 3300 | .debug_ranges section. */ |
ff013f42 | 3301 | if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, NULL)) |
af34e669 | 3302 | return 0; |
43039443 | 3303 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
3304 | ret = -1; |
3305 | } | |
3306 | } | |
c906108c SS |
3307 | |
3308 | if (high < low) | |
3309 | return 0; | |
3310 | ||
3311 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
3312 | eliminate duplicate copies of functions and vtables and such. | |
3313 | The linker will arbitrarily choose one and discard the others. | |
3314 | The AT_*_pc values for such functions refer to local labels in | |
3315 | these sections. If the section from that file was discarded, the | |
3316 | labels are not in the output, so the relocs get a value of 0. | |
3317 | If this is a discarded function, mark the pc bounds as invalid, | |
3318 | so that GDB will ignore it. */ | |
72dca2f5 | 3319 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
3320 | return 0; |
3321 | ||
3322 | *lowpc = low; | |
3323 | *highpc = high; | |
af34e669 | 3324 | return ret; |
c906108c SS |
3325 | } |
3326 | ||
b084d499 JB |
3327 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
3328 | its low and high PC addresses. Do nothing if these addresses could not | |
3329 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
3330 | and HIGHPC to the high address if greater than HIGHPC. */ | |
3331 | ||
3332 | static void | |
3333 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
3334 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
3335 | struct dwarf2_cu *cu) | |
3336 | { | |
3337 | CORE_ADDR low, high; | |
3338 | struct die_info *child = die->child; | |
3339 | ||
3340 | if (dwarf2_get_pc_bounds (die, &low, &high, cu)) | |
3341 | { | |
3342 | *lowpc = min (*lowpc, low); | |
3343 | *highpc = max (*highpc, high); | |
3344 | } | |
3345 | ||
3346 | /* If the language does not allow nested subprograms (either inside | |
3347 | subprograms or lexical blocks), we're done. */ | |
3348 | if (cu->language != language_ada) | |
3349 | return; | |
3350 | ||
3351 | /* Check all the children of the given DIE. If it contains nested | |
3352 | subprograms, then check their pc bounds. Likewise, we need to | |
3353 | check lexical blocks as well, as they may also contain subprogram | |
3354 | definitions. */ | |
3355 | while (child && child->tag) | |
3356 | { | |
3357 | if (child->tag == DW_TAG_subprogram | |
3358 | || child->tag == DW_TAG_lexical_block) | |
3359 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
3360 | child = sibling_die (child); | |
3361 | } | |
3362 | } | |
3363 | ||
fae299cd DC |
3364 | /* Get the low and high pc's represented by the scope DIE, and store |
3365 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
3366 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
3367 | ||
3368 | static void | |
3369 | get_scope_pc_bounds (struct die_info *die, | |
3370 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
3371 | struct dwarf2_cu *cu) | |
3372 | { | |
3373 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
3374 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
3375 | CORE_ADDR current_low, current_high; | |
3376 | ||
3377 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu)) | |
3378 | { | |
3379 | best_low = current_low; | |
3380 | best_high = current_high; | |
3381 | } | |
3382 | else | |
3383 | { | |
3384 | struct die_info *child = die->child; | |
3385 | ||
3386 | while (child && child->tag) | |
3387 | { | |
3388 | switch (child->tag) { | |
3389 | case DW_TAG_subprogram: | |
b084d499 | 3390 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
3391 | break; |
3392 | case DW_TAG_namespace: | |
3393 | /* FIXME: carlton/2004-01-16: Should we do this for | |
3394 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
3395 | that current GCC's always emit the DIEs corresponding | |
3396 | to definitions of methods of classes as children of a | |
3397 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
3398 | the DIEs giving the declarations, which could be | |
3399 | anywhere). But I don't see any reason why the | |
3400 | standards says that they have to be there. */ | |
3401 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
3402 | ||
3403 | if (current_low != ((CORE_ADDR) -1)) | |
3404 | { | |
3405 | best_low = min (best_low, current_low); | |
3406 | best_high = max (best_high, current_high); | |
3407 | } | |
3408 | break; | |
3409 | default: | |
3410 | /* Ignore. */ | |
3411 | break; | |
3412 | } | |
3413 | ||
3414 | child = sibling_die (child); | |
3415 | } | |
3416 | } | |
3417 | ||
3418 | *lowpc = best_low; | |
3419 | *highpc = best_high; | |
3420 | } | |
3421 | ||
801e3a5b JB |
3422 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
3423 | in DIE. */ | |
3424 | static void | |
3425 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
3426 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
3427 | { | |
3428 | struct attribute *attr; | |
3429 | ||
3430 | attr = dwarf2_attr (die, DW_AT_high_pc, cu); | |
3431 | if (attr) | |
3432 | { | |
3433 | CORE_ADDR high = DW_ADDR (attr); | |
3434 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3435 | if (attr) | |
3436 | { | |
3437 | CORE_ADDR low = DW_ADDR (attr); | |
3438 | record_block_range (block, baseaddr + low, baseaddr + high - 1); | |
3439 | } | |
3440 | } | |
3441 | ||
3442 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
3443 | if (attr) | |
3444 | { | |
3445 | bfd *obfd = cu->objfile->obfd; | |
3446 | ||
3447 | /* The value of the DW_AT_ranges attribute is the offset of the | |
3448 | address range list in the .debug_ranges section. */ | |
3449 | unsigned long offset = DW_UNSND (attr); | |
3450 | gdb_byte *buffer = dwarf2_per_objfile->ranges_buffer + offset; | |
3451 | ||
3452 | /* For some target architectures, but not others, the | |
3453 | read_address function sign-extends the addresses it returns. | |
3454 | To recognize base address selection entries, we need a | |
3455 | mask. */ | |
3456 | unsigned int addr_size = cu->header.addr_size; | |
3457 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
3458 | ||
3459 | /* The base address, to which the next pair is relative. Note | |
3460 | that this 'base' is a DWARF concept: most entries in a range | |
3461 | list are relative, to reduce the number of relocs against the | |
3462 | debugging information. This is separate from this function's | |
3463 | 'baseaddr' argument, which GDB uses to relocate debugging | |
3464 | information from a shared library based on the address at | |
3465 | which the library was loaded. */ | |
d00adf39 DE |
3466 | CORE_ADDR base = cu->base_address; |
3467 | int base_known = cu->base_known; | |
801e3a5b JB |
3468 | |
3469 | if (offset >= dwarf2_per_objfile->ranges_size) | |
3470 | { | |
3471 | complaint (&symfile_complaints, | |
3472 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
3473 | offset); | |
3474 | return; | |
3475 | } | |
3476 | ||
3477 | for (;;) | |
3478 | { | |
3479 | unsigned int bytes_read; | |
3480 | CORE_ADDR start, end; | |
3481 | ||
3482 | start = read_address (obfd, buffer, cu, &bytes_read); | |
3483 | buffer += bytes_read; | |
3484 | end = read_address (obfd, buffer, cu, &bytes_read); | |
3485 | buffer += bytes_read; | |
3486 | ||
3487 | /* Did we find the end of the range list? */ | |
3488 | if (start == 0 && end == 0) | |
3489 | break; | |
3490 | ||
3491 | /* Did we find a base address selection entry? */ | |
3492 | else if ((start & base_select_mask) == base_select_mask) | |
3493 | { | |
3494 | base = end; | |
3495 | base_known = 1; | |
3496 | } | |
3497 | ||
3498 | /* We found an ordinary address range. */ | |
3499 | else | |
3500 | { | |
3501 | if (!base_known) | |
3502 | { | |
3503 | complaint (&symfile_complaints, | |
3504 | _("Invalid .debug_ranges data (no base address)")); | |
3505 | return; | |
3506 | } | |
3507 | ||
3508 | record_block_range (block, | |
3509 | baseaddr + base + start, | |
3510 | baseaddr + base + end - 1); | |
3511 | } | |
3512 | } | |
3513 | } | |
3514 | } | |
3515 | ||
c906108c SS |
3516 | /* Add an aggregate field to the field list. */ |
3517 | ||
3518 | static void | |
107d2387 | 3519 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 DJ |
3520 | struct dwarf2_cu *cu) |
3521 | { | |
3522 | struct objfile *objfile = cu->objfile; | |
5e2b427d | 3523 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
3524 | struct nextfield *new_field; |
3525 | struct attribute *attr; | |
3526 | struct field *fp; | |
3527 | char *fieldname = ""; | |
3528 | ||
3529 | /* Allocate a new field list entry and link it in. */ | |
3530 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 3531 | make_cleanup (xfree, new_field); |
c906108c SS |
3532 | memset (new_field, 0, sizeof (struct nextfield)); |
3533 | new_field->next = fip->fields; | |
3534 | fip->fields = new_field; | |
3535 | fip->nfields++; | |
3536 | ||
3537 | /* Handle accessibility and virtuality of field. | |
3538 | The default accessibility for members is public, the default | |
3539 | accessibility for inheritance is private. */ | |
3540 | if (die->tag != DW_TAG_inheritance) | |
3541 | new_field->accessibility = DW_ACCESS_public; | |
3542 | else | |
3543 | new_field->accessibility = DW_ACCESS_private; | |
3544 | new_field->virtuality = DW_VIRTUALITY_none; | |
3545 | ||
e142c38c | 3546 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
3547 | if (attr) |
3548 | new_field->accessibility = DW_UNSND (attr); | |
3549 | if (new_field->accessibility != DW_ACCESS_public) | |
3550 | fip->non_public_fields = 1; | |
e142c38c | 3551 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
3552 | if (attr) |
3553 | new_field->virtuality = DW_UNSND (attr); | |
3554 | ||
3555 | fp = &new_field->field; | |
a9a9bd0f | 3556 | |
e142c38c | 3557 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 3558 | { |
a9a9bd0f DC |
3559 | /* Data member other than a C++ static data member. */ |
3560 | ||
c906108c | 3561 | /* Get type of field. */ |
e7c27a73 | 3562 | fp->type = die_type (die, cu); |
c906108c | 3563 | |
01ad7f36 DJ |
3564 | FIELD_STATIC_KIND (*fp) = 0; |
3565 | ||
c906108c | 3566 | /* Get bit size of field (zero if none). */ |
e142c38c | 3567 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
3568 | if (attr) |
3569 | { | |
3570 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
3571 | } | |
3572 | else | |
3573 | { | |
3574 | FIELD_BITSIZE (*fp) = 0; | |
3575 | } | |
3576 | ||
3577 | /* Get bit offset of field. */ | |
e142c38c | 3578 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
c906108c SS |
3579 | if (attr) |
3580 | { | |
c6a0999f JB |
3581 | int byte_offset; |
3582 | ||
3690dd37 JB |
3583 | if (attr_form_is_section_offset (attr)) |
3584 | { | |
3585 | dwarf2_complex_location_expr_complaint (); | |
c6a0999f | 3586 | byte_offset = 0; |
3690dd37 JB |
3587 | } |
3588 | else if (attr_form_is_constant (attr)) | |
c6a0999f | 3589 | byte_offset = dwarf2_get_attr_constant_value (attr, 0); |
3690dd37 | 3590 | else |
c6a0999f JB |
3591 | byte_offset = decode_locdesc (DW_BLOCK (attr), cu); |
3592 | ||
3593 | FIELD_BITPOS (*fp) = byte_offset * bits_per_byte; | |
c906108c SS |
3594 | } |
3595 | else | |
3596 | FIELD_BITPOS (*fp) = 0; | |
e142c38c | 3597 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
3598 | if (attr) |
3599 | { | |
5e2b427d | 3600 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
3601 | { |
3602 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
3603 | additional bit offset from the MSB of the containing |
3604 | anonymous object to the MSB of the field. We don't | |
3605 | have to do anything special since we don't need to | |
3606 | know the size of the anonymous object. */ | |
c906108c SS |
3607 | FIELD_BITPOS (*fp) += DW_UNSND (attr); |
3608 | } | |
3609 | else | |
3610 | { | |
3611 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
3612 | MSB of the anonymous object, subtract off the number of |
3613 | bits from the MSB of the field to the MSB of the | |
3614 | object, and then subtract off the number of bits of | |
3615 | the field itself. The result is the bit offset of | |
3616 | the LSB of the field. */ | |
c906108c SS |
3617 | int anonymous_size; |
3618 | int bit_offset = DW_UNSND (attr); | |
3619 | ||
e142c38c | 3620 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
3621 | if (attr) |
3622 | { | |
3623 | /* The size of the anonymous object containing | |
3624 | the bit field is explicit, so use the | |
3625 | indicated size (in bytes). */ | |
3626 | anonymous_size = DW_UNSND (attr); | |
3627 | } | |
3628 | else | |
3629 | { | |
3630 | /* The size of the anonymous object containing | |
3631 | the bit field must be inferred from the type | |
3632 | attribute of the data member containing the | |
3633 | bit field. */ | |
3634 | anonymous_size = TYPE_LENGTH (fp->type); | |
3635 | } | |
3636 | FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte | |
3637 | - bit_offset - FIELD_BITSIZE (*fp); | |
3638 | } | |
3639 | } | |
3640 | ||
3641 | /* Get name of field. */ | |
39cbfefa DJ |
3642 | fieldname = dwarf2_name (die, cu); |
3643 | if (fieldname == NULL) | |
3644 | fieldname = ""; | |
d8151005 DJ |
3645 | |
3646 | /* The name is already allocated along with this objfile, so we don't | |
3647 | need to duplicate it for the type. */ | |
3648 | fp->name = fieldname; | |
c906108c SS |
3649 | |
3650 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 3651 | pointer or virtual base class pointer) to private. */ |
e142c38c | 3652 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c SS |
3653 | { |
3654 | new_field->accessibility = DW_ACCESS_private; | |
3655 | fip->non_public_fields = 1; | |
3656 | } | |
3657 | } | |
a9a9bd0f | 3658 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 3659 | { |
a9a9bd0f DC |
3660 | /* C++ static member. */ |
3661 | ||
3662 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
3663 | is a declaration, but all versions of G++ as of this writing | |
3664 | (so through at least 3.2.1) incorrectly generate | |
3665 | DW_TAG_variable tags. */ | |
3666 | ||
c906108c | 3667 | char *physname; |
c906108c | 3668 | |
a9a9bd0f | 3669 | /* Get name of field. */ |
39cbfefa DJ |
3670 | fieldname = dwarf2_name (die, cu); |
3671 | if (fieldname == NULL) | |
c906108c SS |
3672 | return; |
3673 | ||
2df3850c | 3674 | /* Get physical name. */ |
e142c38c | 3675 | physname = dwarf2_linkage_name (die, cu); |
c906108c | 3676 | |
d8151005 DJ |
3677 | /* The name is already allocated along with this objfile, so we don't |
3678 | need to duplicate it for the type. */ | |
3679 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 3680 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 3681 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
3682 | } |
3683 | else if (die->tag == DW_TAG_inheritance) | |
3684 | { | |
3685 | /* C++ base class field. */ | |
e142c38c | 3686 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
c906108c | 3687 | if (attr) |
e7c27a73 | 3688 | FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu) |
107d2387 | 3689 | * bits_per_byte); |
c906108c | 3690 | FIELD_BITSIZE (*fp) = 0; |
01ad7f36 | 3691 | FIELD_STATIC_KIND (*fp) = 0; |
e7c27a73 | 3692 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
3693 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
3694 | fip->nbaseclasses++; | |
3695 | } | |
3696 | } | |
3697 | ||
3698 | /* Create the vector of fields, and attach it to the type. */ | |
3699 | ||
3700 | static void | |
fba45db2 | 3701 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 3702 | struct dwarf2_cu *cu) |
c906108c SS |
3703 | { |
3704 | int nfields = fip->nfields; | |
3705 | ||
3706 | /* Record the field count, allocate space for the array of fields, | |
3707 | and create blank accessibility bitfields if necessary. */ | |
3708 | TYPE_NFIELDS (type) = nfields; | |
3709 | TYPE_FIELDS (type) = (struct field *) | |
3710 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
3711 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
3712 | ||
3713 | if (fip->non_public_fields) | |
3714 | { | |
3715 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
3716 | ||
3717 | TYPE_FIELD_PRIVATE_BITS (type) = | |
3718 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
3719 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
3720 | ||
3721 | TYPE_FIELD_PROTECTED_BITS (type) = | |
3722 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
3723 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
3724 | ||
3725 | TYPE_FIELD_IGNORE_BITS (type) = | |
3726 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
3727 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
3728 | } | |
3729 | ||
3730 | /* If the type has baseclasses, allocate and clear a bit vector for | |
3731 | TYPE_FIELD_VIRTUAL_BITS. */ | |
3732 | if (fip->nbaseclasses) | |
3733 | { | |
3734 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 3735 | unsigned char *pointer; |
c906108c SS |
3736 | |
3737 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
3738 | pointer = TYPE_ALLOC (type, num_bytes); |
3739 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
3740 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
3741 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
3742 | } | |
3743 | ||
3744 | /* Copy the saved-up fields into the field vector. Start from the head | |
3745 | of the list, adding to the tail of the field array, so that they end | |
3746 | up in the same order in the array in which they were added to the list. */ | |
3747 | while (nfields-- > 0) | |
3748 | { | |
3749 | TYPE_FIELD (type, nfields) = fip->fields->field; | |
3750 | switch (fip->fields->accessibility) | |
3751 | { | |
c5aa993b JM |
3752 | case DW_ACCESS_private: |
3753 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
3754 | break; | |
c906108c | 3755 | |
c5aa993b JM |
3756 | case DW_ACCESS_protected: |
3757 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
3758 | break; | |
c906108c | 3759 | |
c5aa993b JM |
3760 | case DW_ACCESS_public: |
3761 | break; | |
c906108c | 3762 | |
c5aa993b JM |
3763 | default: |
3764 | /* Unknown accessibility. Complain and treat it as public. */ | |
3765 | { | |
e2e0b3e5 | 3766 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
4d3c2250 | 3767 | fip->fields->accessibility); |
c5aa993b JM |
3768 | } |
3769 | break; | |
c906108c SS |
3770 | } |
3771 | if (nfields < fip->nbaseclasses) | |
3772 | { | |
3773 | switch (fip->fields->virtuality) | |
3774 | { | |
c5aa993b JM |
3775 | case DW_VIRTUALITY_virtual: |
3776 | case DW_VIRTUALITY_pure_virtual: | |
3777 | SET_TYPE_FIELD_VIRTUAL (type, nfields); | |
3778 | break; | |
c906108c SS |
3779 | } |
3780 | } | |
3781 | fip->fields = fip->fields->next; | |
3782 | } | |
3783 | } | |
3784 | ||
c906108c SS |
3785 | /* Add a member function to the proper fieldlist. */ |
3786 | ||
3787 | static void | |
107d2387 | 3788 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 3789 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 3790 | { |
e7c27a73 | 3791 | struct objfile *objfile = cu->objfile; |
c906108c SS |
3792 | struct attribute *attr; |
3793 | struct fnfieldlist *flp; | |
3794 | int i; | |
3795 | struct fn_field *fnp; | |
3796 | char *fieldname; | |
3797 | char *physname; | |
3798 | struct nextfnfield *new_fnfield; | |
f792889a | 3799 | struct type *this_type; |
c906108c | 3800 | |
2df3850c | 3801 | /* Get name of member function. */ |
39cbfefa DJ |
3802 | fieldname = dwarf2_name (die, cu); |
3803 | if (fieldname == NULL) | |
2df3850c | 3804 | return; |
c906108c | 3805 | |
2df3850c | 3806 | /* Get the mangled name. */ |
e142c38c | 3807 | physname = dwarf2_linkage_name (die, cu); |
c906108c SS |
3808 | |
3809 | /* Look up member function name in fieldlist. */ | |
3810 | for (i = 0; i < fip->nfnfields; i++) | |
3811 | { | |
27bfe10e | 3812 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
3813 | break; |
3814 | } | |
3815 | ||
3816 | /* Create new list element if necessary. */ | |
3817 | if (i < fip->nfnfields) | |
3818 | flp = &fip->fnfieldlists[i]; | |
3819 | else | |
3820 | { | |
3821 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
3822 | { | |
3823 | fip->fnfieldlists = (struct fnfieldlist *) | |
3824 | xrealloc (fip->fnfieldlists, | |
3825 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 3826 | * sizeof (struct fnfieldlist)); |
c906108c | 3827 | if (fip->nfnfields == 0) |
c13c43fd | 3828 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
3829 | } |
3830 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
3831 | flp->name = fieldname; | |
3832 | flp->length = 0; | |
3833 | flp->head = NULL; | |
3834 | fip->nfnfields++; | |
3835 | } | |
3836 | ||
3837 | /* Create a new member function field and chain it to the field list | |
3838 | entry. */ | |
3839 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); | |
b8c9b27d | 3840 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
3841 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
3842 | new_fnfield->next = flp->head; | |
3843 | flp->head = new_fnfield; | |
3844 | flp->length++; | |
3845 | ||
3846 | /* Fill in the member function field info. */ | |
3847 | fnp = &new_fnfield->fnfield; | |
d8151005 DJ |
3848 | /* The name is already allocated along with this objfile, so we don't |
3849 | need to duplicate it for the type. */ | |
3850 | fnp->physname = physname ? physname : ""; | |
c906108c | 3851 | fnp->type = alloc_type (objfile); |
f792889a DJ |
3852 | this_type = read_type_die (die, cu); |
3853 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 3854 | { |
f792889a | 3855 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 3856 | |
f792889a | 3857 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
3858 | of the method itself (TYPE_CODE_METHOD). */ |
3859 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
3860 | TYPE_TARGET_TYPE (this_type), |
3861 | TYPE_FIELDS (this_type), | |
3862 | TYPE_NFIELDS (this_type), | |
3863 | TYPE_VARARGS (this_type)); | |
c906108c SS |
3864 | |
3865 | /* Handle static member functions. | |
c5aa993b JM |
3866 | Dwarf2 has no clean way to discern C++ static and non-static |
3867 | member functions. G++ helps GDB by marking the first | |
3868 | parameter for non-static member functions (which is the | |
3869 | this pointer) as artificial. We obtain this information | |
3870 | from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 3871 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
3872 | fnp->voffset = VOFFSET_STATIC; |
3873 | } | |
3874 | else | |
e2e0b3e5 | 3875 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
4d3c2250 | 3876 | physname); |
c906108c SS |
3877 | |
3878 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 3879 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 3880 | fnp->fcontext = die_containing_type (die, cu); |
c906108c SS |
3881 | |
3882 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const | |
3883 | and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
3884 | ||
3885 | /* Get accessibility. */ | |
e142c38c | 3886 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
3887 | if (attr) |
3888 | { | |
3889 | switch (DW_UNSND (attr)) | |
3890 | { | |
c5aa993b JM |
3891 | case DW_ACCESS_private: |
3892 | fnp->is_private = 1; | |
3893 | break; | |
3894 | case DW_ACCESS_protected: | |
3895 | fnp->is_protected = 1; | |
3896 | break; | |
c906108c SS |
3897 | } |
3898 | } | |
3899 | ||
b02dede2 | 3900 | /* Check for artificial methods. */ |
e142c38c | 3901 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
3902 | if (attr && DW_UNSND (attr) != 0) |
3903 | fnp->is_artificial = 1; | |
3904 | ||
c906108c | 3905 | /* Get index in virtual function table if it is a virtual member function. */ |
e142c38c | 3906 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
c906108c | 3907 | if (attr) |
8e19ed76 PS |
3908 | { |
3909 | /* Support the .debug_loc offsets */ | |
3910 | if (attr_form_is_block (attr)) | |
3911 | { | |
e7c27a73 | 3912 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; |
8e19ed76 | 3913 | } |
3690dd37 | 3914 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 3915 | { |
4d3c2250 | 3916 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
3917 | } |
3918 | else | |
3919 | { | |
4d3c2250 KB |
3920 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
3921 | fieldname); | |
8e19ed76 PS |
3922 | } |
3923 | } | |
c906108c SS |
3924 | } |
3925 | ||
3926 | /* Create the vector of member function fields, and attach it to the type. */ | |
3927 | ||
3928 | static void | |
fba45db2 | 3929 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 3930 | struct dwarf2_cu *cu) |
c906108c SS |
3931 | { |
3932 | struct fnfieldlist *flp; | |
3933 | int total_length = 0; | |
3934 | int i; | |
3935 | ||
3936 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
3937 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
3938 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
3939 | ||
3940 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
3941 | { | |
3942 | struct nextfnfield *nfp = flp->head; | |
3943 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
3944 | int k; | |
3945 | ||
3946 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
3947 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
3948 | fn_flp->fn_fields = (struct fn_field *) | |
3949 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
3950 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 3951 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
3952 | |
3953 | total_length += flp->length; | |
3954 | } | |
3955 | ||
3956 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
3957 | TYPE_NFN_FIELDS_TOTAL (type) = total_length; | |
3958 | } | |
3959 | ||
1168df01 JB |
3960 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
3961 | language, zero otherwise. */ | |
3962 | static int | |
3963 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
3964 | { | |
3965 | static const char vptr[] = "_vptr"; | |
987504bb | 3966 | static const char vtable[] = "vtable"; |
1168df01 | 3967 | |
987504bb JJ |
3968 | /* Look for the C++ and Java forms of the vtable. */ |
3969 | if ((cu->language == language_java | |
3970 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
3971 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
3972 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
3973 | return 1; |
3974 | ||
3975 | return 0; | |
3976 | } | |
3977 | ||
c0dd20ea DJ |
3978 | /* GCC outputs unnamed structures that are really pointers to member |
3979 | functions, with the ABI-specified layout. If DIE (from CU) describes | |
3980 | such a structure, set its type, and return nonzero. Otherwise return | |
61049d3b DJ |
3981 | zero. |
3982 | ||
3983 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
3984 | This is GCC PR debug/28767. */ | |
c0dd20ea | 3985 | |
f792889a | 3986 | static struct type * |
c0dd20ea DJ |
3987 | quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu) |
3988 | { | |
3989 | struct objfile *objfile = cu->objfile; | |
3990 | struct type *type; | |
3991 | struct die_info *pfn_die, *delta_die; | |
3992 | struct attribute *pfn_name, *delta_name; | |
3993 | struct type *pfn_type, *domain_type; | |
3994 | ||
3995 | /* Check for a structure with no name and two children. */ | |
3996 | if (die->tag != DW_TAG_structure_type | |
3997 | || dwarf2_attr (die, DW_AT_name, cu) != NULL | |
3998 | || die->child == NULL | |
3999 | || die->child->sibling == NULL | |
4000 | || (die->child->sibling->sibling != NULL | |
4001 | && die->child->sibling->sibling->tag != DW_TAG_padding)) | |
f792889a | 4002 | return NULL; |
c0dd20ea DJ |
4003 | |
4004 | /* Check for __pfn and __delta members. */ | |
4005 | pfn_die = die->child; | |
4006 | pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu); | |
4007 | if (pfn_die->tag != DW_TAG_member | |
4008 | || pfn_name == NULL | |
4009 | || DW_STRING (pfn_name) == NULL | |
4010 | || strcmp ("__pfn", DW_STRING (pfn_name)) != 0) | |
f792889a | 4011 | return NULL; |
c0dd20ea DJ |
4012 | |
4013 | delta_die = pfn_die->sibling; | |
4014 | delta_name = dwarf2_attr (delta_die, DW_AT_name, cu); | |
4015 | if (delta_die->tag != DW_TAG_member | |
4016 | || delta_name == NULL | |
4017 | || DW_STRING (delta_name) == NULL | |
4018 | || strcmp ("__delta", DW_STRING (delta_name)) != 0) | |
f792889a | 4019 | return NULL; |
c0dd20ea DJ |
4020 | |
4021 | /* Find the type of the method. */ | |
4022 | pfn_type = die_type (pfn_die, cu); | |
4023 | if (pfn_type == NULL | |
4024 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
4025 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
f792889a | 4026 | return NULL; |
c0dd20ea DJ |
4027 | |
4028 | /* Look for the "this" argument. */ | |
4029 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
4030 | if (TYPE_NFIELDS (pfn_type) == 0 | |
4031 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) | |
f792889a | 4032 | return NULL; |
c0dd20ea DJ |
4033 | |
4034 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
4035 | type = alloc_type (objfile); | |
4036 | smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
4037 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), | |
4038 | TYPE_VARARGS (pfn_type)); | |
0d5de010 | 4039 | type = lookup_methodptr_type (type); |
f792889a | 4040 | return set_die_type (die, type, cu); |
c0dd20ea | 4041 | } |
1168df01 | 4042 | |
c906108c SS |
4043 | /* Called when we find the DIE that starts a structure or union scope |
4044 | (definition) to process all dies that define the members of the | |
4045 | structure or union. | |
4046 | ||
4047 | NOTE: we need to call struct_type regardless of whether or not the | |
4048 | DIE has an at_name attribute, since it might be an anonymous | |
4049 | structure or union. This gets the type entered into our set of | |
4050 | user defined types. | |
4051 | ||
4052 | However, if the structure is incomplete (an opaque struct/union) | |
4053 | then suppress creating a symbol table entry for it since gdb only | |
4054 | wants to find the one with the complete definition. Note that if | |
4055 | it is complete, we just call new_symbol, which does it's own | |
4056 | checking about whether the struct/union is anonymous or not (and | |
4057 | suppresses creating a symbol table entry itself). */ | |
4058 | ||
f792889a | 4059 | static struct type * |
134d01f1 | 4060 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4061 | { |
e7c27a73 | 4062 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4063 | struct type *type; |
4064 | struct attribute *attr; | |
39cbfefa | 4065 | char *name; |
0114d602 | 4066 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c | 4067 | |
f792889a DJ |
4068 | type = quirk_gcc_member_function_pointer (die, cu); |
4069 | if (type) | |
4070 | return type; | |
c906108c | 4071 | |
c0dd20ea | 4072 | type = alloc_type (objfile); |
c906108c | 4073 | INIT_CPLUS_SPECIFIC (type); |
39cbfefa DJ |
4074 | name = dwarf2_name (die, cu); |
4075 | if (name != NULL) | |
c906108c | 4076 | { |
987504bb JJ |
4077 | if (cu->language == language_cplus |
4078 | || cu->language == language_java) | |
63d06c5c | 4079 | { |
0114d602 DJ |
4080 | const char *new_prefix = determine_class_name (die, cu); |
4081 | TYPE_TAG_NAME (type) = (char *) new_prefix; | |
63d06c5c DC |
4082 | } |
4083 | else | |
4084 | { | |
d8151005 DJ |
4085 | /* The name is already allocated along with this objfile, so |
4086 | we don't need to duplicate it for the type. */ | |
39cbfefa | 4087 | TYPE_TAG_NAME (type) = name; |
63d06c5c | 4088 | } |
c906108c SS |
4089 | } |
4090 | ||
4091 | if (die->tag == DW_TAG_structure_type) | |
4092 | { | |
4093 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
4094 | } | |
4095 | else if (die->tag == DW_TAG_union_type) | |
4096 | { | |
4097 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
4098 | } | |
4099 | else | |
4100 | { | |
4101 | /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT | |
c5aa993b | 4102 | in gdbtypes.h. */ |
c906108c SS |
4103 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
4104 | } | |
4105 | ||
e142c38c | 4106 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4107 | if (attr) |
4108 | { | |
4109 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
4110 | } | |
4111 | else | |
4112 | { | |
4113 | TYPE_LENGTH (type) = 0; | |
4114 | } | |
4115 | ||
876cecd0 | 4116 | TYPE_STUB_SUPPORTED (type) = 1; |
dc718098 | 4117 | if (die_is_declaration (die, cu)) |
876cecd0 | 4118 | TYPE_STUB (type) = 1; |
dc718098 | 4119 | |
c906108c SS |
4120 | /* We need to add the type field to the die immediately so we don't |
4121 | infinitely recurse when dealing with pointers to the structure | |
4122 | type within the structure itself. */ | |
1c379e20 | 4123 | set_die_type (die, type, cu); |
c906108c | 4124 | |
e142c38c | 4125 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
4126 | { |
4127 | struct field_info fi; | |
4128 | struct die_info *child_die; | |
c906108c SS |
4129 | |
4130 | memset (&fi, 0, sizeof (struct field_info)); | |
4131 | ||
639d11d3 | 4132 | child_die = die->child; |
c906108c SS |
4133 | |
4134 | while (child_die && child_die->tag) | |
4135 | { | |
a9a9bd0f DC |
4136 | if (child_die->tag == DW_TAG_member |
4137 | || child_die->tag == DW_TAG_variable) | |
c906108c | 4138 | { |
a9a9bd0f DC |
4139 | /* NOTE: carlton/2002-11-05: A C++ static data member |
4140 | should be a DW_TAG_member that is a declaration, but | |
4141 | all versions of G++ as of this writing (so through at | |
4142 | least 3.2.1) incorrectly generate DW_TAG_variable | |
4143 | tags for them instead. */ | |
e7c27a73 | 4144 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 4145 | } |
8713b1b1 | 4146 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c SS |
4147 | { |
4148 | /* C++ member function. */ | |
e7c27a73 | 4149 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
4150 | } |
4151 | else if (child_die->tag == DW_TAG_inheritance) | |
4152 | { | |
4153 | /* C++ base class field. */ | |
e7c27a73 | 4154 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 4155 | } |
c906108c SS |
4156 | child_die = sibling_die (child_die); |
4157 | } | |
4158 | ||
4159 | /* Attach fields and member functions to the type. */ | |
4160 | if (fi.nfields) | |
e7c27a73 | 4161 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
4162 | if (fi.nfnfields) |
4163 | { | |
e7c27a73 | 4164 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 4165 | |
c5aa993b | 4166 | /* Get the type which refers to the base class (possibly this |
c906108c SS |
4167 | class itself) which contains the vtable pointer for the current |
4168 | class from the DW_AT_containing_type attribute. */ | |
4169 | ||
e142c38c | 4170 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 4171 | { |
e7c27a73 | 4172 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
4173 | |
4174 | TYPE_VPTR_BASETYPE (type) = t; | |
4175 | if (type == t) | |
4176 | { | |
c906108c SS |
4177 | int i; |
4178 | ||
4179 | /* Our own class provides vtbl ptr. */ | |
4180 | for (i = TYPE_NFIELDS (t) - 1; | |
4181 | i >= TYPE_N_BASECLASSES (t); | |
4182 | --i) | |
4183 | { | |
4184 | char *fieldname = TYPE_FIELD_NAME (t, i); | |
4185 | ||
1168df01 | 4186 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
4187 | { |
4188 | TYPE_VPTR_FIELDNO (type) = i; | |
4189 | break; | |
4190 | } | |
4191 | } | |
4192 | ||
4193 | /* Complain if virtual function table field not found. */ | |
4194 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 4195 | complaint (&symfile_complaints, |
e2e0b3e5 | 4196 | _("virtual function table pointer not found when defining class '%s'"), |
4d3c2250 KB |
4197 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
4198 | ""); | |
c906108c SS |
4199 | } |
4200 | else | |
4201 | { | |
4202 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
4203 | } | |
4204 | } | |
f6235d4c EZ |
4205 | else if (cu->producer |
4206 | && strncmp (cu->producer, | |
4207 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
4208 | { | |
4209 | /* The IBM XLC compiler does not provide direct indication | |
4210 | of the containing type, but the vtable pointer is | |
4211 | always named __vfp. */ | |
4212 | ||
4213 | int i; | |
4214 | ||
4215 | for (i = TYPE_NFIELDS (type) - 1; | |
4216 | i >= TYPE_N_BASECLASSES (type); | |
4217 | --i) | |
4218 | { | |
4219 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
4220 | { | |
4221 | TYPE_VPTR_FIELDNO (type) = i; | |
4222 | TYPE_VPTR_BASETYPE (type) = type; | |
4223 | break; | |
4224 | } | |
4225 | } | |
4226 | } | |
c906108c | 4227 | } |
c906108c | 4228 | } |
63d06c5c | 4229 | |
0114d602 | 4230 | do_cleanups (back_to); |
f792889a | 4231 | return type; |
c906108c SS |
4232 | } |
4233 | ||
134d01f1 DJ |
4234 | static void |
4235 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
4236 | { | |
4237 | struct objfile *objfile = cu->objfile; | |
90aeadfc | 4238 | struct die_info *child_die = die->child; |
f792889a | 4239 | struct type *this_type; |
c906108c | 4240 | |
f792889a DJ |
4241 | this_type = get_die_type (die, cu); |
4242 | if (this_type == NULL) | |
4243 | this_type = read_structure_type (die, cu); | |
c906108c | 4244 | |
90aeadfc DC |
4245 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
4246 | snapshots) has been known to create a die giving a declaration | |
4247 | for a class that has, as a child, a die giving a definition for a | |
4248 | nested class. So we have to process our children even if the | |
4249 | current die is a declaration. Normally, of course, a declaration | |
4250 | won't have any children at all. */ | |
134d01f1 | 4251 | |
90aeadfc DC |
4252 | while (child_die != NULL && child_die->tag) |
4253 | { | |
4254 | if (child_die->tag == DW_TAG_member | |
4255 | || child_die->tag == DW_TAG_variable | |
4256 | || child_die->tag == DW_TAG_inheritance) | |
134d01f1 | 4257 | { |
90aeadfc | 4258 | /* Do nothing. */ |
134d01f1 | 4259 | } |
90aeadfc DC |
4260 | else |
4261 | process_die (child_die, cu); | |
134d01f1 | 4262 | |
90aeadfc | 4263 | child_die = sibling_die (child_die); |
134d01f1 DJ |
4264 | } |
4265 | ||
fa4028e9 JB |
4266 | /* Do not consider external references. According to the DWARF standard, |
4267 | these DIEs are identified by the fact that they have no byte_size | |
4268 | attribute, and a declaration attribute. */ | |
4269 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
4270 | || !die_is_declaration (die, cu)) | |
f792889a | 4271 | new_symbol (die, this_type, cu); |
134d01f1 DJ |
4272 | } |
4273 | ||
4274 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
4275 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 4276 | |
f792889a | 4277 | static struct type * |
134d01f1 | 4278 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4279 | { |
e7c27a73 | 4280 | struct objfile *objfile = cu->objfile; |
c906108c | 4281 | struct type *type; |
c906108c | 4282 | struct attribute *attr; |
0114d602 | 4283 | const char *name; |
134d01f1 | 4284 | |
c906108c SS |
4285 | type = alloc_type (objfile); |
4286 | ||
4287 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
0114d602 | 4288 | name = dwarf2_full_name (die, cu); |
39cbfefa | 4289 | if (name != NULL) |
0114d602 | 4290 | TYPE_TAG_NAME (type) = (char *) name; |
c906108c | 4291 | |
e142c38c | 4292 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4293 | if (attr) |
4294 | { | |
4295 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
4296 | } | |
4297 | else | |
4298 | { | |
4299 | TYPE_LENGTH (type) = 0; | |
4300 | } | |
4301 | ||
137033e9 JB |
4302 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
4303 | declared as private in the package spec, and then defined only | |
4304 | inside the package body. Such types are known as Taft Amendment | |
4305 | Types. When another package uses such a type, an incomplete DIE | |
4306 | may be generated by the compiler. */ | |
02eb380e | 4307 | if (die_is_declaration (die, cu)) |
876cecd0 | 4308 | TYPE_STUB (type) = 1; |
02eb380e | 4309 | |
f792889a | 4310 | return set_die_type (die, type, cu); |
134d01f1 DJ |
4311 | } |
4312 | ||
8176b9b8 | 4313 | /* Determine the name of the type represented by DIE, which should be |
0114d602 DJ |
4314 | a named C++ or Java compound type. Return the name in question, |
4315 | allocated on the objfile obstack. */ | |
8176b9b8 | 4316 | |
0114d602 | 4317 | static const char * |
8176b9b8 DC |
4318 | determine_class_name (struct die_info *die, struct dwarf2_cu *cu) |
4319 | { | |
0114d602 | 4320 | const char *new_prefix = NULL; |
8176b9b8 DC |
4321 | |
4322 | /* If we don't have namespace debug info, guess the name by trying | |
4323 | to demangle the names of members, just like we did in | |
72bf9492 | 4324 | guess_structure_name. */ |
8176b9b8 DC |
4325 | if (!processing_has_namespace_info) |
4326 | { | |
4327 | struct die_info *child; | |
4328 | ||
4329 | for (child = die->child; | |
4330 | child != NULL && child->tag != 0; | |
4331 | child = sibling_die (child)) | |
4332 | { | |
4333 | if (child->tag == DW_TAG_subprogram) | |
4334 | { | |
0114d602 | 4335 | char *phys_prefix |
31c27f77 JJ |
4336 | = language_class_name_from_physname (cu->language_defn, |
4337 | dwarf2_linkage_name | |
8176b9b8 DC |
4338 | (child, cu)); |
4339 | ||
0114d602 DJ |
4340 | if (phys_prefix != NULL) |
4341 | { | |
4342 | new_prefix | |
4343 | = obsavestring (phys_prefix, strlen (phys_prefix), | |
4344 | &cu->objfile->objfile_obstack); | |
4345 | xfree (phys_prefix); | |
4346 | break; | |
4347 | } | |
8176b9b8 DC |
4348 | } |
4349 | } | |
4350 | } | |
4351 | ||
4352 | if (new_prefix == NULL) | |
0114d602 | 4353 | new_prefix = dwarf2_full_name (die, cu); |
8176b9b8 DC |
4354 | |
4355 | return new_prefix; | |
4356 | } | |
4357 | ||
134d01f1 DJ |
4358 | /* Given a pointer to a die which begins an enumeration, process all |
4359 | the dies that define the members of the enumeration, and create the | |
4360 | symbol for the enumeration type. | |
4361 | ||
4362 | NOTE: We reverse the order of the element list. */ | |
4363 | ||
4364 | static void | |
4365 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
4366 | { | |
4367 | struct objfile *objfile = cu->objfile; | |
4368 | struct die_info *child_die; | |
4369 | struct field *fields; | |
134d01f1 DJ |
4370 | struct symbol *sym; |
4371 | int num_fields; | |
4372 | int unsigned_enum = 1; | |
39cbfefa | 4373 | char *name; |
f792889a | 4374 | struct type *this_type; |
134d01f1 | 4375 | |
c906108c SS |
4376 | num_fields = 0; |
4377 | fields = NULL; | |
f792889a DJ |
4378 | this_type = get_die_type (die, cu); |
4379 | if (this_type == NULL) | |
4380 | this_type = read_enumeration_type (die, cu); | |
639d11d3 | 4381 | if (die->child != NULL) |
c906108c | 4382 | { |
639d11d3 | 4383 | child_die = die->child; |
c906108c SS |
4384 | while (child_die && child_die->tag) |
4385 | { | |
4386 | if (child_die->tag != DW_TAG_enumerator) | |
4387 | { | |
e7c27a73 | 4388 | process_die (child_die, cu); |
c906108c SS |
4389 | } |
4390 | else | |
4391 | { | |
39cbfefa DJ |
4392 | name = dwarf2_name (child_die, cu); |
4393 | if (name) | |
c906108c | 4394 | { |
f792889a | 4395 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
4396 | if (SYMBOL_VALUE (sym) < 0) |
4397 | unsigned_enum = 0; | |
4398 | ||
4399 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
4400 | { | |
4401 | fields = (struct field *) | |
4402 | xrealloc (fields, | |
4403 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 4404 | * sizeof (struct field)); |
c906108c SS |
4405 | } |
4406 | ||
3567439c | 4407 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c SS |
4408 | FIELD_TYPE (fields[num_fields]) = NULL; |
4409 | FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym); | |
4410 | FIELD_BITSIZE (fields[num_fields]) = 0; | |
01ad7f36 | 4411 | FIELD_STATIC_KIND (fields[num_fields]) = 0; |
c906108c SS |
4412 | |
4413 | num_fields++; | |
4414 | } | |
4415 | } | |
4416 | ||
4417 | child_die = sibling_die (child_die); | |
4418 | } | |
4419 | ||
4420 | if (num_fields) | |
4421 | { | |
f792889a DJ |
4422 | TYPE_NFIELDS (this_type) = num_fields; |
4423 | TYPE_FIELDS (this_type) = (struct field *) | |
4424 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
4425 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 4426 | sizeof (struct field) * num_fields); |
b8c9b27d | 4427 | xfree (fields); |
c906108c SS |
4428 | } |
4429 | if (unsigned_enum) | |
876cecd0 | 4430 | TYPE_UNSIGNED (this_type) = 1; |
c906108c | 4431 | } |
134d01f1 | 4432 | |
f792889a | 4433 | new_symbol (die, this_type, cu); |
c906108c SS |
4434 | } |
4435 | ||
4436 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
4437 | the DIE's type field. For now, this only handles one dimensional | |
4438 | arrays. */ | |
4439 | ||
f792889a | 4440 | static struct type * |
e7c27a73 | 4441 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4442 | { |
e7c27a73 | 4443 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4444 | struct die_info *child_die; |
4445 | struct type *type = NULL; | |
4446 | struct type *element_type, *range_type, *index_type; | |
4447 | struct type **range_types = NULL; | |
4448 | struct attribute *attr; | |
4449 | int ndim = 0; | |
4450 | struct cleanup *back_to; | |
39cbfefa | 4451 | char *name; |
c906108c | 4452 | |
e7c27a73 | 4453 | element_type = die_type (die, cu); |
c906108c SS |
4454 | |
4455 | /* Irix 6.2 native cc creates array types without children for | |
4456 | arrays with unspecified length. */ | |
639d11d3 | 4457 | if (die->child == NULL) |
c906108c | 4458 | { |
6ccb9162 | 4459 | index_type = builtin_type_int32; |
c906108c | 4460 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
4461 | type = create_array_type (NULL, element_type, range_type); |
4462 | return set_die_type (die, type, cu); | |
c906108c SS |
4463 | } |
4464 | ||
4465 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 4466 | child_die = die->child; |
c906108c SS |
4467 | while (child_die && child_die->tag) |
4468 | { | |
4469 | if (child_die->tag == DW_TAG_subrange_type) | |
4470 | { | |
f792889a DJ |
4471 | struct type *child_type = read_type_die (child_die, cu); |
4472 | if (child_type != NULL) | |
a02abb62 JB |
4473 | { |
4474 | /* The range type was succesfully read. Save it for | |
4475 | the array type creation. */ | |
4476 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) | |
4477 | { | |
4478 | range_types = (struct type **) | |
4479 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
4480 | * sizeof (struct type *)); | |
4481 | if (ndim == 0) | |
4482 | make_cleanup (free_current_contents, &range_types); | |
4483 | } | |
f792889a | 4484 | range_types[ndim++] = child_type; |
a02abb62 | 4485 | } |
c906108c SS |
4486 | } |
4487 | child_die = sibling_die (child_die); | |
4488 | } | |
4489 | ||
4490 | /* Dwarf2 dimensions are output from left to right, create the | |
4491 | necessary array types in backwards order. */ | |
7ca2d3a3 | 4492 | |
c906108c | 4493 | type = element_type; |
7ca2d3a3 DL |
4494 | |
4495 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
4496 | { | |
4497 | int i = 0; | |
4498 | while (i < ndim) | |
4499 | type = create_array_type (NULL, type, range_types[i++]); | |
4500 | } | |
4501 | else | |
4502 | { | |
4503 | while (ndim-- > 0) | |
4504 | type = create_array_type (NULL, type, range_types[ndim]); | |
4505 | } | |
c906108c | 4506 | |
f5f8a009 EZ |
4507 | /* Understand Dwarf2 support for vector types (like they occur on |
4508 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
4509 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
4510 | custom vendor extension. The main difference between a regular | |
4511 | array and the vector variant is that vectors are passed by value | |
4512 | to functions. */ | |
e142c38c | 4513 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 4514 | if (attr) |
ea37ba09 | 4515 | make_vector_type (type); |
f5f8a009 | 4516 | |
39cbfefa DJ |
4517 | name = dwarf2_name (die, cu); |
4518 | if (name) | |
4519 | TYPE_NAME (type) = name; | |
714e295e | 4520 | |
c906108c SS |
4521 | do_cleanups (back_to); |
4522 | ||
4523 | /* Install the type in the die. */ | |
f792889a | 4524 | return set_die_type (die, type, cu); |
c906108c SS |
4525 | } |
4526 | ||
7ca2d3a3 DL |
4527 | static enum dwarf_array_dim_ordering |
4528 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) | |
4529 | { | |
4530 | struct attribute *attr; | |
4531 | ||
4532 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
4533 | ||
4534 | if (attr) return DW_SND (attr); | |
4535 | ||
4536 | /* | |
4537 | GNU F77 is a special case, as at 08/2004 array type info is the | |
4538 | opposite order to the dwarf2 specification, but data is still | |
4539 | laid out as per normal fortran. | |
4540 | ||
4541 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need | |
4542 | version checking. | |
4543 | */ | |
4544 | ||
4545 | if (cu->language == language_fortran && | |
4546 | cu->producer && strstr (cu->producer, "GNU F77")) | |
4547 | { | |
4548 | return DW_ORD_row_major; | |
4549 | } | |
4550 | ||
4551 | switch (cu->language_defn->la_array_ordering) | |
4552 | { | |
4553 | case array_column_major: | |
4554 | return DW_ORD_col_major; | |
4555 | case array_row_major: | |
4556 | default: | |
4557 | return DW_ORD_row_major; | |
4558 | }; | |
4559 | } | |
4560 | ||
72019c9c GM |
4561 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
4562 | the DIE's type field. */ | |
4563 | ||
f792889a | 4564 | static struct type * |
72019c9c GM |
4565 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
4566 | { | |
f792889a DJ |
4567 | struct type *set_type = create_set_type (NULL, die_type (die, cu)); |
4568 | ||
4569 | return set_die_type (die, set_type, cu); | |
72019c9c | 4570 | } |
7ca2d3a3 | 4571 | |
c906108c SS |
4572 | /* First cut: install each common block member as a global variable. */ |
4573 | ||
4574 | static void | |
e7c27a73 | 4575 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
4576 | { |
4577 | struct die_info *child_die; | |
4578 | struct attribute *attr; | |
4579 | struct symbol *sym; | |
4580 | CORE_ADDR base = (CORE_ADDR) 0; | |
4581 | ||
e142c38c | 4582 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
4583 | if (attr) |
4584 | { | |
8e19ed76 PS |
4585 | /* Support the .debug_loc offsets */ |
4586 | if (attr_form_is_block (attr)) | |
4587 | { | |
e7c27a73 | 4588 | base = decode_locdesc (DW_BLOCK (attr), cu); |
8e19ed76 | 4589 | } |
3690dd37 | 4590 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 4591 | { |
4d3c2250 | 4592 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
4593 | } |
4594 | else | |
4595 | { | |
4d3c2250 KB |
4596 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
4597 | "common block member"); | |
8e19ed76 | 4598 | } |
c906108c | 4599 | } |
639d11d3 | 4600 | if (die->child != NULL) |
c906108c | 4601 | { |
639d11d3 | 4602 | child_die = die->child; |
c906108c SS |
4603 | while (child_die && child_die->tag) |
4604 | { | |
e7c27a73 | 4605 | sym = new_symbol (child_die, NULL, cu); |
e142c38c | 4606 | attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu); |
c906108c SS |
4607 | if (attr) |
4608 | { | |
4609 | SYMBOL_VALUE_ADDRESS (sym) = | |
e7c27a73 | 4610 | base + decode_locdesc (DW_BLOCK (attr), cu); |
c906108c SS |
4611 | add_symbol_to_list (sym, &global_symbols); |
4612 | } | |
4613 | child_die = sibling_die (child_die); | |
4614 | } | |
4615 | } | |
4616 | } | |
4617 | ||
0114d602 | 4618 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 4619 | |
0114d602 DJ |
4620 | static struct type * |
4621 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 4622 | { |
e7c27a73 | 4623 | struct objfile *objfile = cu->objfile; |
0114d602 | 4624 | const char *previous_prefix, *name; |
9219021c | 4625 | int is_anonymous; |
0114d602 DJ |
4626 | struct type *type; |
4627 | ||
4628 | /* For extensions, reuse the type of the original namespace. */ | |
4629 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
4630 | { | |
4631 | struct die_info *ext_die; | |
4632 | struct dwarf2_cu *ext_cu = cu; | |
4633 | ext_die = dwarf2_extension (die, &ext_cu); | |
4634 | type = read_type_die (ext_die, ext_cu); | |
4635 | return set_die_type (die, type, cu); | |
4636 | } | |
9219021c | 4637 | |
e142c38c | 4638 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
4639 | |
4640 | /* Now build the name of the current namespace. */ | |
4641 | ||
0114d602 DJ |
4642 | previous_prefix = determine_prefix (die, cu); |
4643 | if (previous_prefix[0] != '\0') | |
4644 | name = typename_concat (&objfile->objfile_obstack, | |
4645 | previous_prefix, name, cu); | |
4646 | ||
4647 | /* Create the type. */ | |
4648 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
4649 | objfile); | |
4650 | TYPE_NAME (type) = (char *) name; | |
4651 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
4652 | ||
4653 | set_die_type (die, type, cu); | |
4654 | ||
4655 | return type; | |
4656 | } | |
4657 | ||
4658 | /* Read a C++ namespace. */ | |
4659 | ||
4660 | static void | |
4661 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
4662 | { | |
4663 | struct objfile *objfile = cu->objfile; | |
4664 | const char *name; | |
4665 | int is_anonymous; | |
9219021c | 4666 | |
5c4e30ca DC |
4667 | /* Add a symbol associated to this if we haven't seen the namespace |
4668 | before. Also, add a using directive if it's an anonymous | |
4669 | namespace. */ | |
9219021c | 4670 | |
f2f0e013 | 4671 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
4672 | { |
4673 | struct type *type; | |
4674 | ||
0114d602 | 4675 | type = read_type_die (die, cu); |
e7c27a73 | 4676 | new_symbol (die, type, cu); |
5c4e30ca | 4677 | |
0114d602 | 4678 | name = namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 4679 | if (is_anonymous) |
0114d602 DJ |
4680 | { |
4681 | const char *previous_prefix = determine_prefix (die, cu); | |
4682 | cp_add_using_directive (TYPE_NAME (type), | |
4683 | strlen (previous_prefix), | |
4684 | strlen (TYPE_NAME (type))); | |
4685 | } | |
5c4e30ca | 4686 | } |
9219021c | 4687 | |
639d11d3 | 4688 | if (die->child != NULL) |
d9fa45fe | 4689 | { |
639d11d3 | 4690 | struct die_info *child_die = die->child; |
d9fa45fe DC |
4691 | |
4692 | while (child_die && child_die->tag) | |
4693 | { | |
e7c27a73 | 4694 | process_die (child_die, cu); |
d9fa45fe DC |
4695 | child_die = sibling_die (child_die); |
4696 | } | |
4697 | } | |
38d518c9 EZ |
4698 | } |
4699 | ||
4700 | /* Return the name of the namespace represented by DIE. Set | |
4701 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
4702 | namespace. */ | |
4703 | ||
4704 | static const char * | |
e142c38c | 4705 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
4706 | { |
4707 | struct die_info *current_die; | |
4708 | const char *name = NULL; | |
4709 | ||
4710 | /* Loop through the extensions until we find a name. */ | |
4711 | ||
4712 | for (current_die = die; | |
4713 | current_die != NULL; | |
f2f0e013 | 4714 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 4715 | { |
e142c38c | 4716 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
4717 | if (name != NULL) |
4718 | break; | |
4719 | } | |
4720 | ||
4721 | /* Is it an anonymous namespace? */ | |
4722 | ||
4723 | *is_anonymous = (name == NULL); | |
4724 | if (*is_anonymous) | |
4725 | name = "(anonymous namespace)"; | |
4726 | ||
4727 | return name; | |
d9fa45fe DC |
4728 | } |
4729 | ||
c906108c SS |
4730 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
4731 | the user defined type vector. */ | |
4732 | ||
f792889a | 4733 | static struct type * |
e7c27a73 | 4734 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4735 | { |
5e2b427d | 4736 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 4737 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 4738 | struct type *type; |
8b2dbe47 KB |
4739 | struct attribute *attr_byte_size; |
4740 | struct attribute *attr_address_class; | |
4741 | int byte_size, addr_class; | |
c906108c | 4742 | |
e7c27a73 | 4743 | type = lookup_pointer_type (die_type (die, cu)); |
8b2dbe47 | 4744 | |
e142c38c | 4745 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
4746 | if (attr_byte_size) |
4747 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 4748 | else |
8b2dbe47 KB |
4749 | byte_size = cu_header->addr_size; |
4750 | ||
e142c38c | 4751 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
4752 | if (attr_address_class) |
4753 | addr_class = DW_UNSND (attr_address_class); | |
4754 | else | |
4755 | addr_class = DW_ADDR_none; | |
4756 | ||
4757 | /* If the pointer size or address class is different than the | |
4758 | default, create a type variant marked as such and set the | |
4759 | length accordingly. */ | |
4760 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 4761 | { |
5e2b427d | 4762 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
4763 | { |
4764 | int type_flags; | |
4765 | ||
849957d9 | 4766 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 4767 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
4768 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
4769 | == 0); | |
8b2dbe47 KB |
4770 | type = make_type_with_address_space (type, type_flags); |
4771 | } | |
4772 | else if (TYPE_LENGTH (type) != byte_size) | |
4773 | { | |
e2e0b3e5 | 4774 | complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size); |
8b2dbe47 KB |
4775 | } |
4776 | else { | |
4777 | /* Should we also complain about unhandled address classes? */ | |
4778 | } | |
c906108c | 4779 | } |
8b2dbe47 KB |
4780 | |
4781 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 4782 | return set_die_type (die, type, cu); |
c906108c SS |
4783 | } |
4784 | ||
4785 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
4786 | the user defined type vector. */ | |
4787 | ||
f792889a | 4788 | static struct type * |
e7c27a73 | 4789 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4790 | { |
e7c27a73 | 4791 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4792 | struct type *type; |
4793 | struct type *to_type; | |
4794 | struct type *domain; | |
4795 | ||
e7c27a73 DJ |
4796 | to_type = die_type (die, cu); |
4797 | domain = die_containing_type (die, cu); | |
0d5de010 DJ |
4798 | |
4799 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) | |
4800 | type = lookup_methodptr_type (to_type); | |
4801 | else | |
4802 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 4803 | |
f792889a | 4804 | return set_die_type (die, type, cu); |
c906108c SS |
4805 | } |
4806 | ||
4807 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
4808 | the user defined type vector. */ | |
4809 | ||
f792889a | 4810 | static struct type * |
e7c27a73 | 4811 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4812 | { |
e7c27a73 | 4813 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
4814 | struct type *type; |
4815 | struct attribute *attr; | |
4816 | ||
e7c27a73 | 4817 | type = lookup_reference_type (die_type (die, cu)); |
e142c38c | 4818 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
4819 | if (attr) |
4820 | { | |
4821 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
4822 | } | |
4823 | else | |
4824 | { | |
107d2387 | 4825 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 4826 | } |
f792889a | 4827 | return set_die_type (die, type, cu); |
c906108c SS |
4828 | } |
4829 | ||
f792889a | 4830 | static struct type * |
e7c27a73 | 4831 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4832 | { |
f792889a | 4833 | struct type *base_type, *cv_type; |
c906108c | 4834 | |
e7c27a73 | 4835 | base_type = die_type (die, cu); |
f792889a DJ |
4836 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
4837 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
4838 | } |
4839 | ||
f792889a | 4840 | static struct type * |
e7c27a73 | 4841 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4842 | { |
f792889a | 4843 | struct type *base_type, *cv_type; |
c906108c | 4844 | |
e7c27a73 | 4845 | base_type = die_type (die, cu); |
f792889a DJ |
4846 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
4847 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
4848 | } |
4849 | ||
4850 | /* Extract all information from a DW_TAG_string_type DIE and add to | |
4851 | the user defined type vector. It isn't really a user defined type, | |
4852 | but it behaves like one, with other DIE's using an AT_user_def_type | |
4853 | attribute to reference it. */ | |
4854 | ||
f792889a | 4855 | static struct type * |
e7c27a73 | 4856 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4857 | { |
e7c27a73 | 4858 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4859 | struct type *type, *range_type, *index_type, *char_type; |
4860 | struct attribute *attr; | |
4861 | unsigned int length; | |
4862 | ||
e142c38c | 4863 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
4864 | if (attr) |
4865 | { | |
4866 | length = DW_UNSND (attr); | |
4867 | } | |
4868 | else | |
4869 | { | |
b21b22e0 | 4870 | /* check for the DW_AT_byte_size attribute */ |
e142c38c | 4871 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
4872 | if (attr) |
4873 | { | |
4874 | length = DW_UNSND (attr); | |
4875 | } | |
4876 | else | |
4877 | { | |
4878 | length = 1; | |
4879 | } | |
c906108c | 4880 | } |
6ccb9162 UW |
4881 | |
4882 | index_type = builtin_type_int32; | |
c906108c | 4883 | range_type = create_range_type (NULL, index_type, 1, length); |
6ccb9162 UW |
4884 | type = create_string_type (NULL, range_type); |
4885 | ||
f792889a | 4886 | return set_die_type (die, type, cu); |
c906108c SS |
4887 | } |
4888 | ||
4889 | /* Handle DIES due to C code like: | |
4890 | ||
4891 | struct foo | |
c5aa993b JM |
4892 | { |
4893 | int (*funcp)(int a, long l); | |
4894 | int b; | |
4895 | }; | |
c906108c SS |
4896 | |
4897 | ('funcp' generates a DW_TAG_subroutine_type DIE) | |
c5aa993b | 4898 | */ |
c906108c | 4899 | |
f792889a | 4900 | static struct type * |
e7c27a73 | 4901 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
4902 | { |
4903 | struct type *type; /* Type that this function returns */ | |
4904 | struct type *ftype; /* Function that returns above type */ | |
4905 | struct attribute *attr; | |
4906 | ||
e7c27a73 | 4907 | type = die_type (die, cu); |
1326e61b | 4908 | ftype = make_function_type (type, (struct type **) 0); |
c906108c | 4909 | |
5b8101ae | 4910 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 4911 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 4912 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 4913 | || cu->language == language_cplus |
5b8101ae PM |
4914 | || cu->language == language_java |
4915 | || cu->language == language_pascal) | |
876cecd0 | 4916 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 4917 | |
c055b101 CV |
4918 | /* Store the calling convention in the type if it's available in |
4919 | the subroutine die. Otherwise set the calling convention to | |
4920 | the default value DW_CC_normal. */ | |
4921 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
4922 | TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal; | |
4923 | ||
639d11d3 | 4924 | if (die->child != NULL) |
c906108c SS |
4925 | { |
4926 | struct die_info *child_die; | |
4927 | int nparams = 0; | |
4928 | int iparams = 0; | |
4929 | ||
4930 | /* Count the number of parameters. | |
4931 | FIXME: GDB currently ignores vararg functions, but knows about | |
4932 | vararg member functions. */ | |
639d11d3 | 4933 | child_die = die->child; |
c906108c SS |
4934 | while (child_die && child_die->tag) |
4935 | { | |
4936 | if (child_die->tag == DW_TAG_formal_parameter) | |
4937 | nparams++; | |
4938 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 4939 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
4940 | child_die = sibling_die (child_die); |
4941 | } | |
4942 | ||
4943 | /* Allocate storage for parameters and fill them in. */ | |
4944 | TYPE_NFIELDS (ftype) = nparams; | |
4945 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 4946 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 4947 | |
639d11d3 | 4948 | child_die = die->child; |
c906108c SS |
4949 | while (child_die && child_die->tag) |
4950 | { | |
4951 | if (child_die->tag == DW_TAG_formal_parameter) | |
4952 | { | |
4953 | /* Dwarf2 has no clean way to discern C++ static and non-static | |
c5aa993b JM |
4954 | member functions. G++ helps GDB by marking the first |
4955 | parameter for non-static member functions (which is the | |
4956 | this pointer) as artificial. We pass this information | |
4957 | to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ | |
e142c38c | 4958 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
4959 | if (attr) |
4960 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
4961 | else | |
4962 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
e7c27a73 | 4963 | TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu); |
c906108c SS |
4964 | iparams++; |
4965 | } | |
4966 | child_die = sibling_die (child_die); | |
4967 | } | |
4968 | } | |
4969 | ||
f792889a | 4970 | return set_die_type (die, ftype, cu); |
c906108c SS |
4971 | } |
4972 | ||
f792889a | 4973 | static struct type * |
e7c27a73 | 4974 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4975 | { |
e7c27a73 | 4976 | struct objfile *objfile = cu->objfile; |
2f038fcb | 4977 | struct attribute *attr; |
0114d602 | 4978 | const char *name = NULL; |
f792889a | 4979 | struct type *this_type; |
c906108c | 4980 | |
0114d602 | 4981 | name = dwarf2_full_name (die, cu); |
f792889a | 4982 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 DJ |
4983 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
4984 | TYPE_NAME (this_type) = (char *) name; | |
f792889a DJ |
4985 | set_die_type (die, this_type, cu); |
4986 | TYPE_TARGET_TYPE (this_type) = die_type (die, cu); | |
4987 | return this_type; | |
c906108c SS |
4988 | } |
4989 | ||
4990 | /* Find a representation of a given base type and install | |
4991 | it in the TYPE field of the die. */ | |
4992 | ||
f792889a | 4993 | static struct type * |
e7c27a73 | 4994 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 4995 | { |
e7c27a73 | 4996 | struct objfile *objfile = cu->objfile; |
c906108c SS |
4997 | struct type *type; |
4998 | struct attribute *attr; | |
4999 | int encoding = 0, size = 0; | |
39cbfefa | 5000 | char *name; |
6ccb9162 UW |
5001 | enum type_code code = TYPE_CODE_INT; |
5002 | int type_flags = 0; | |
5003 | struct type *target_type = NULL; | |
c906108c | 5004 | |
e142c38c | 5005 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
5006 | if (attr) |
5007 | { | |
5008 | encoding = DW_UNSND (attr); | |
5009 | } | |
e142c38c | 5010 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
5011 | if (attr) |
5012 | { | |
5013 | size = DW_UNSND (attr); | |
5014 | } | |
39cbfefa | 5015 | name = dwarf2_name (die, cu); |
6ccb9162 | 5016 | if (!name) |
c906108c | 5017 | { |
6ccb9162 UW |
5018 | complaint (&symfile_complaints, |
5019 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 5020 | } |
6ccb9162 UW |
5021 | |
5022 | switch (encoding) | |
c906108c | 5023 | { |
6ccb9162 UW |
5024 | case DW_ATE_address: |
5025 | /* Turn DW_ATE_address into a void * pointer. */ | |
5026 | code = TYPE_CODE_PTR; | |
5027 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5028 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
5029 | break; | |
5030 | case DW_ATE_boolean: | |
5031 | code = TYPE_CODE_BOOL; | |
5032 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5033 | break; | |
5034 | case DW_ATE_complex_float: | |
5035 | code = TYPE_CODE_COMPLEX; | |
5036 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
5037 | break; | |
5038 | case DW_ATE_decimal_float: | |
5039 | code = TYPE_CODE_DECFLOAT; | |
5040 | break; | |
5041 | case DW_ATE_float: | |
5042 | code = TYPE_CODE_FLT; | |
5043 | break; | |
5044 | case DW_ATE_signed: | |
5045 | break; | |
5046 | case DW_ATE_unsigned: | |
5047 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5048 | break; | |
5049 | case DW_ATE_signed_char: | |
1760d9d5 | 5050 | if (cu->language == language_ada || cu->language == language_m2) |
6ccb9162 UW |
5051 | code = TYPE_CODE_CHAR; |
5052 | break; | |
5053 | case DW_ATE_unsigned_char: | |
1760d9d5 | 5054 | if (cu->language == language_ada || cu->language == language_m2) |
6ccb9162 UW |
5055 | code = TYPE_CODE_CHAR; |
5056 | type_flags |= TYPE_FLAG_UNSIGNED; | |
5057 | break; | |
5058 | default: | |
5059 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
5060 | dwarf_type_encoding_name (encoding)); | |
5061 | break; | |
c906108c | 5062 | } |
6ccb9162 | 5063 | |
0114d602 DJ |
5064 | type = init_type (code, size, type_flags, NULL, objfile); |
5065 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
5066 | TYPE_TARGET_TYPE (type) = target_type; |
5067 | ||
0114d602 | 5068 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 5069 | TYPE_NOSIGN (type) = 1; |
0114d602 | 5070 | |
f792889a | 5071 | return set_die_type (die, type, cu); |
c906108c SS |
5072 | } |
5073 | ||
a02abb62 JB |
5074 | /* Read the given DW_AT_subrange DIE. */ |
5075 | ||
f792889a | 5076 | static struct type * |
a02abb62 JB |
5077 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
5078 | { | |
5e2b427d | 5079 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
a02abb62 JB |
5080 | struct type *base_type; |
5081 | struct type *range_type; | |
5082 | struct attribute *attr; | |
5083 | int low = 0; | |
5084 | int high = -1; | |
39cbfefa | 5085 | char *name; |
a02abb62 | 5086 | |
a02abb62 | 5087 | base_type = die_type (die, cu); |
3d1f72c2 | 5088 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
a02abb62 JB |
5089 | { |
5090 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5091 | _("DW_AT_type missing from DW_TAG_subrange_type")); |
17a912b6 | 5092 | base_type |
5e2b427d | 5093 | = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8, |
6ccb9162 | 5094 | 0, NULL, cu->objfile); |
a02abb62 JB |
5095 | } |
5096 | ||
e142c38c | 5097 | if (cu->language == language_fortran) |
a02abb62 JB |
5098 | { |
5099 | /* FORTRAN implies a lower bound of 1, if not given. */ | |
5100 | low = 1; | |
5101 | } | |
5102 | ||
dd5e6932 DJ |
5103 | /* FIXME: For variable sized arrays either of these could be |
5104 | a variable rather than a constant value. We'll allow it, | |
5105 | but we don't know how to handle it. */ | |
e142c38c | 5106 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 JB |
5107 | if (attr) |
5108 | low = dwarf2_get_attr_constant_value (attr, 0); | |
5109 | ||
e142c38c | 5110 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 JB |
5111 | if (attr) |
5112 | { | |
5113 | if (attr->form == DW_FORM_block1) | |
5114 | { | |
5115 | /* GCC encodes arrays with unspecified or dynamic length | |
5116 | with a DW_FORM_block1 attribute. | |
5117 | FIXME: GDB does not yet know how to handle dynamic | |
5118 | arrays properly, treat them as arrays with unspecified | |
5119 | length for now. | |
5120 | ||
5121 | FIXME: jimb/2003-09-22: GDB does not really know | |
5122 | how to handle arrays of unspecified length | |
5123 | either; we just represent them as zero-length | |
5124 | arrays. Choose an appropriate upper bound given | |
5125 | the lower bound we've computed above. */ | |
5126 | high = low - 1; | |
5127 | } | |
5128 | else | |
5129 | high = dwarf2_get_attr_constant_value (attr, 1); | |
5130 | } | |
5131 | ||
5132 | range_type = create_range_type (NULL, base_type, low, high); | |
5133 | ||
39cbfefa DJ |
5134 | name = dwarf2_name (die, cu); |
5135 | if (name) | |
5136 | TYPE_NAME (range_type) = name; | |
a02abb62 | 5137 | |
e142c38c | 5138 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
5139 | if (attr) |
5140 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
5141 | ||
f792889a | 5142 | return set_die_type (die, range_type, cu); |
a02abb62 JB |
5143 | } |
5144 | ||
f792889a | 5145 | static struct type * |
81a17f79 JB |
5146 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
5147 | { | |
5148 | struct type *type; | |
81a17f79 | 5149 | |
81a17f79 JB |
5150 | /* For now, we only support the C meaning of an unspecified type: void. */ |
5151 | ||
0114d602 DJ |
5152 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
5153 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 5154 | |
f792889a | 5155 | return set_die_type (die, type, cu); |
81a17f79 | 5156 | } |
a02abb62 | 5157 | |
51545339 DJ |
5158 | /* Trivial hash function for die_info: the hash value of a DIE |
5159 | is its offset in .debug_info for this objfile. */ | |
5160 | ||
5161 | static hashval_t | |
5162 | die_hash (const void *item) | |
5163 | { | |
5164 | const struct die_info *die = item; | |
5165 | return die->offset; | |
5166 | } | |
5167 | ||
5168 | /* Trivial comparison function for die_info structures: two DIEs | |
5169 | are equal if they have the same offset. */ | |
5170 | ||
5171 | static int | |
5172 | die_eq (const void *item_lhs, const void *item_rhs) | |
5173 | { | |
5174 | const struct die_info *die_lhs = item_lhs; | |
5175 | const struct die_info *die_rhs = item_rhs; | |
5176 | return die_lhs->offset == die_rhs->offset; | |
5177 | } | |
5178 | ||
c906108c SS |
5179 | /* Read a whole compilation unit into a linked list of dies. */ |
5180 | ||
f9aca02d | 5181 | static struct die_info * |
fe1b8b76 | 5182 | read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu) |
c906108c | 5183 | { |
51545339 DJ |
5184 | cu->die_hash |
5185 | = htab_create_alloc_ex (cu->header.length / 12, | |
5186 | die_hash, | |
5187 | die_eq, | |
5188 | NULL, | |
5189 | &cu->comp_unit_obstack, | |
5190 | hashtab_obstack_allocate, | |
5191 | dummy_obstack_deallocate); | |
5192 | ||
e7c27a73 | 5193 | return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL); |
639d11d3 DC |
5194 | } |
5195 | ||
5196 | /* Read a single die and all its descendents. Set the die's sibling | |
5197 | field to NULL; set other fields in the die correctly, and set all | |
5198 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
5199 | location of the info_ptr after reading all of those dies. PARENT | |
5200 | is the parent of the die in question. */ | |
5201 | ||
5202 | static struct die_info * | |
fe1b8b76 | 5203 | read_die_and_children (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 5204 | struct dwarf2_cu *cu, |
fe1b8b76 | 5205 | gdb_byte **new_info_ptr, |
639d11d3 DC |
5206 | struct die_info *parent) |
5207 | { | |
5208 | struct die_info *die; | |
fe1b8b76 | 5209 | gdb_byte *cur_ptr; |
639d11d3 DC |
5210 | int has_children; |
5211 | ||
e7c27a73 | 5212 | cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children); |
1d325ec1 DJ |
5213 | if (die == NULL) |
5214 | { | |
5215 | *new_info_ptr = cur_ptr; | |
5216 | return NULL; | |
5217 | } | |
51545339 | 5218 | store_in_ref_table (die, cu); |
639d11d3 DC |
5219 | |
5220 | if (has_children) | |
5221 | { | |
e7c27a73 | 5222 | die->child = read_die_and_siblings (cur_ptr, abfd, cu, |
639d11d3 DC |
5223 | new_info_ptr, die); |
5224 | } | |
5225 | else | |
5226 | { | |
5227 | die->child = NULL; | |
5228 | *new_info_ptr = cur_ptr; | |
5229 | } | |
5230 | ||
5231 | die->sibling = NULL; | |
5232 | die->parent = parent; | |
5233 | return die; | |
5234 | } | |
5235 | ||
5236 | /* Read a die, all of its descendents, and all of its siblings; set | |
5237 | all of the fields of all of the dies correctly. Arguments are as | |
5238 | in read_die_and_children. */ | |
5239 | ||
5240 | static struct die_info * | |
fe1b8b76 | 5241 | read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd, |
e7c27a73 | 5242 | struct dwarf2_cu *cu, |
fe1b8b76 | 5243 | gdb_byte **new_info_ptr, |
639d11d3 DC |
5244 | struct die_info *parent) |
5245 | { | |
5246 | struct die_info *first_die, *last_sibling; | |
fe1b8b76 | 5247 | gdb_byte *cur_ptr; |
639d11d3 | 5248 | |
c906108c | 5249 | cur_ptr = info_ptr; |
639d11d3 DC |
5250 | first_die = last_sibling = NULL; |
5251 | ||
5252 | while (1) | |
c906108c | 5253 | { |
639d11d3 | 5254 | struct die_info *die |
e7c27a73 | 5255 | = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent); |
639d11d3 | 5256 | |
1d325ec1 | 5257 | if (die == NULL) |
c906108c | 5258 | { |
639d11d3 DC |
5259 | *new_info_ptr = cur_ptr; |
5260 | return first_die; | |
c906108c | 5261 | } |
1d325ec1 DJ |
5262 | |
5263 | if (!first_die) | |
5264 | first_die = die; | |
c906108c | 5265 | else |
1d325ec1 DJ |
5266 | last_sibling->sibling = die; |
5267 | ||
5268 | last_sibling = die; | |
c906108c | 5269 | } |
c906108c SS |
5270 | } |
5271 | ||
233a11ab CS |
5272 | /* Decompress a section that was compressed using zlib. Store the |
5273 | decompressed buffer, and its size, in OUTBUF and OUTSIZE. */ | |
5274 | ||
5275 | static void | |
5276 | zlib_decompress_section (struct objfile *objfile, asection *sectp, | |
5277 | gdb_byte **outbuf, bfd_size_type *outsize) | |
5278 | { | |
ef72380d | 5279 | bfd *abfd = objfile->obfd; |
233a11ab CS |
5280 | #ifndef HAVE_ZLIB_H |
5281 | error (_("Support for zlib-compressed DWARF data (from '%s') " | |
5282 | "is disabled in this copy of GDB"), | |
5283 | bfd_get_filename (abfd)); | |
5284 | #else | |
233a11ab CS |
5285 | bfd_size_type compressed_size = bfd_get_section_size (sectp); |
5286 | gdb_byte *compressed_buffer = xmalloc (compressed_size); | |
5287 | bfd_size_type uncompressed_size; | |
5288 | gdb_byte *uncompressed_buffer; | |
5289 | z_stream strm; | |
5290 | int rc; | |
5291 | int header_size = 12; | |
5292 | ||
5293 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
5294 | || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size) | |
5295 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
5296 | bfd_get_filename (abfd)); | |
5297 | ||
5298 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
5299 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
5300 | if (compressed_size < header_size | |
5301 | || strncmp (compressed_buffer, "ZLIB", 4) != 0) | |
5302 | error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"), | |
5303 | bfd_get_filename (abfd)); | |
5304 | uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8; | |
5305 | uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8; | |
5306 | uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8; | |
5307 | uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8; | |
5308 | uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8; | |
5309 | uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8; | |
5310 | uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8; | |
5311 | uncompressed_size += compressed_buffer[11]; | |
5312 | ||
5313 | /* It is possible the section consists of several compressed | |
5314 | buffers concatenated together, so we uncompress in a loop. */ | |
5315 | strm.zalloc = NULL; | |
5316 | strm.zfree = NULL; | |
5317 | strm.opaque = NULL; | |
5318 | strm.avail_in = compressed_size - header_size; | |
5319 | strm.next_in = (Bytef*) compressed_buffer + header_size; | |
5320 | strm.avail_out = uncompressed_size; | |
5321 | uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack, | |
5322 | uncompressed_size); | |
5323 | rc = inflateInit (&strm); | |
5324 | while (strm.avail_in > 0) | |
5325 | { | |
5326 | if (rc != Z_OK) | |
5327 | error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"), | |
5328 | bfd_get_filename (abfd), rc); | |
5329 | strm.next_out = ((Bytef*) uncompressed_buffer | |
5330 | + (uncompressed_size - strm.avail_out)); | |
5331 | rc = inflate (&strm, Z_FINISH); | |
5332 | if (rc != Z_STREAM_END) | |
5333 | error (_("Dwarf Error: zlib error uncompressing from '%s': %d"), | |
5334 | bfd_get_filename (abfd), rc); | |
5335 | rc = inflateReset (&strm); | |
5336 | } | |
5337 | rc = inflateEnd (&strm); | |
5338 | if (rc != Z_OK | |
5339 | || strm.avail_out != 0) | |
5340 | error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"), | |
5341 | bfd_get_filename (abfd), rc); | |
5342 | ||
5343 | xfree (compressed_buffer); | |
5344 | *outbuf = uncompressed_buffer; | |
5345 | *outsize = uncompressed_size; | |
5346 | #endif | |
5347 | } | |
5348 | ||
5349 | ||
c906108c | 5350 | /* Read the contents of the section at OFFSET and of size SIZE from the |
233a11ab CS |
5351 | object file specified by OBJFILE into the objfile_obstack and return it. |
5352 | If the section is compressed, uncompress it before returning. */ | |
c906108c | 5353 | |
fe1b8b76 | 5354 | gdb_byte * |
188dd5d6 | 5355 | dwarf2_read_section (struct objfile *objfile, asection *sectp) |
c906108c SS |
5356 | { |
5357 | bfd *abfd = objfile->obfd; | |
fe1b8b76 | 5358 | gdb_byte *buf, *retbuf; |
2c500098 | 5359 | bfd_size_type size = bfd_get_section_size (sectp); |
233a11ab | 5360 | unsigned char header[4]; |
c906108c SS |
5361 | |
5362 | if (size == 0) | |
5363 | return NULL; | |
5364 | ||
233a11ab CS |
5365 | /* Check if the file has a 4-byte header indicating compression. */ |
5366 | if (size > sizeof (header) | |
5367 | && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0 | |
5368 | && bfd_bread (header, sizeof (header), abfd) == sizeof (header)) | |
5369 | { | |
5370 | /* Upon decompression, update the buffer and its size. */ | |
5371 | if (strncmp (header, "ZLIB", sizeof (header)) == 0) | |
5372 | { | |
5373 | zlib_decompress_section (objfile, sectp, &buf, &size); | |
5374 | dwarf2_resize_section (sectp, size); | |
5375 | return buf; | |
5376 | } | |
5377 | } | |
5378 | ||
5379 | /* If we get here, we are a normal, not-compressed section. */ | |
fe1b8b76 | 5380 | buf = obstack_alloc (&objfile->objfile_obstack, size); |
233a11ab CS |
5381 | /* When debugging .o files, we may need to apply relocations; see |
5382 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
5383 | We never compress sections in .o files, so we only need to | |
5384 | try this when the section is not compressed. */ | |
fe1b8b76 | 5385 | retbuf = symfile_relocate_debug_section (abfd, sectp, buf); |
086df311 DJ |
5386 | if (retbuf != NULL) |
5387 | return retbuf; | |
5388 | ||
188dd5d6 DJ |
5389 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
5390 | || bfd_bread (buf, size, abfd) != size) | |
8a3fe4f8 | 5391 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), |
188dd5d6 DJ |
5392 | bfd_get_filename (abfd)); |
5393 | ||
c906108c SS |
5394 | return buf; |
5395 | } | |
5396 | ||
5397 | /* In DWARF version 2, the description of the debugging information is | |
5398 | stored in a separate .debug_abbrev section. Before we read any | |
5399 | dies from a section we read in all abbreviations and install them | |
72bf9492 DJ |
5400 | in a hash table. This function also sets flags in CU describing |
5401 | the data found in the abbrev table. */ | |
c906108c SS |
5402 | |
5403 | static void | |
e7c27a73 | 5404 | dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu) |
c906108c | 5405 | { |
e7c27a73 | 5406 | struct comp_unit_head *cu_header = &cu->header; |
fe1b8b76 | 5407 | gdb_byte *abbrev_ptr; |
c906108c SS |
5408 | struct abbrev_info *cur_abbrev; |
5409 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
5410 | unsigned int abbrev_form, hash_number; | |
f3dd6933 DJ |
5411 | struct attr_abbrev *cur_attrs; |
5412 | unsigned int allocated_attrs; | |
c906108c | 5413 | |
57349743 | 5414 | /* Initialize dwarf2 abbrevs */ |
f3dd6933 DJ |
5415 | obstack_init (&cu->abbrev_obstack); |
5416 | cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack, | |
5417 | (ABBREV_HASH_SIZE | |
5418 | * sizeof (struct abbrev_info *))); | |
5419 | memset (cu->dwarf2_abbrevs, 0, | |
5420 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 5421 | |
6502dd73 | 5422 | abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset; |
c906108c SS |
5423 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
5424 | abbrev_ptr += bytes_read; | |
5425 | ||
f3dd6933 DJ |
5426 | allocated_attrs = ATTR_ALLOC_CHUNK; |
5427 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
5428 | ||
c906108c SS |
5429 | /* loop until we reach an abbrev number of 0 */ |
5430 | while (abbrev_number) | |
5431 | { | |
f3dd6933 | 5432 | cur_abbrev = dwarf_alloc_abbrev (cu); |
c906108c SS |
5433 | |
5434 | /* read in abbrev header */ | |
5435 | cur_abbrev->number = abbrev_number; | |
5436 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5437 | abbrev_ptr += bytes_read; | |
5438 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
5439 | abbrev_ptr += 1; | |
5440 | ||
72bf9492 DJ |
5441 | if (cur_abbrev->tag == DW_TAG_namespace) |
5442 | cu->has_namespace_info = 1; | |
5443 | ||
c906108c SS |
5444 | /* now read in declarations */ |
5445 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5446 | abbrev_ptr += bytes_read; | |
5447 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5448 | abbrev_ptr += bytes_read; | |
5449 | while (abbrev_name) | |
5450 | { | |
f3dd6933 | 5451 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 5452 | { |
f3dd6933 DJ |
5453 | allocated_attrs += ATTR_ALLOC_CHUNK; |
5454 | cur_attrs | |
5455 | = xrealloc (cur_attrs, (allocated_attrs | |
5456 | * sizeof (struct attr_abbrev))); | |
c906108c | 5457 | } |
ae038cb0 DJ |
5458 | |
5459 | /* Record whether this compilation unit might have | |
5460 | inter-compilation-unit references. If we don't know what form | |
5461 | this attribute will have, then it might potentially be a | |
5462 | DW_FORM_ref_addr, so we conservatively expect inter-CU | |
5463 | references. */ | |
5464 | ||
5465 | if (abbrev_form == DW_FORM_ref_addr | |
5466 | || abbrev_form == DW_FORM_indirect) | |
5467 | cu->has_form_ref_addr = 1; | |
5468 | ||
f3dd6933 DJ |
5469 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
5470 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
5471 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
5472 | abbrev_ptr += bytes_read; | |
5473 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5474 | abbrev_ptr += bytes_read; | |
5475 | } | |
5476 | ||
f3dd6933 DJ |
5477 | cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack, |
5478 | (cur_abbrev->num_attrs | |
5479 | * sizeof (struct attr_abbrev))); | |
5480 | memcpy (cur_abbrev->attrs, cur_attrs, | |
5481 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
5482 | ||
c906108c | 5483 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
f3dd6933 DJ |
5484 | cur_abbrev->next = cu->dwarf2_abbrevs[hash_number]; |
5485 | cu->dwarf2_abbrevs[hash_number] = cur_abbrev; | |
c906108c SS |
5486 | |
5487 | /* Get next abbreviation. | |
5488 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
5489 | always properly terminated with an abbrev number of 0. |
5490 | Exit loop if we encounter an abbreviation which we have | |
5491 | already read (which means we are about to read the abbreviations | |
5492 | for the next compile unit) or if the end of the abbreviation | |
5493 | table is reached. */ | |
6502dd73 DJ |
5494 | if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer) |
5495 | >= dwarf2_per_objfile->abbrev_size) | |
c906108c SS |
5496 | break; |
5497 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
5498 | abbrev_ptr += bytes_read; | |
e7c27a73 | 5499 | if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL) |
c906108c SS |
5500 | break; |
5501 | } | |
f3dd6933 DJ |
5502 | |
5503 | xfree (cur_attrs); | |
c906108c SS |
5504 | } |
5505 | ||
f3dd6933 | 5506 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 5507 | |
c906108c | 5508 | static void |
f3dd6933 | 5509 | dwarf2_free_abbrev_table (void *ptr_to_cu) |
c906108c | 5510 | { |
f3dd6933 | 5511 | struct dwarf2_cu *cu = ptr_to_cu; |
c906108c | 5512 | |
f3dd6933 DJ |
5513 | obstack_free (&cu->abbrev_obstack, NULL); |
5514 | cu->dwarf2_abbrevs = NULL; | |
c906108c SS |
5515 | } |
5516 | ||
5517 | /* Lookup an abbrev_info structure in the abbrev hash table. */ | |
5518 | ||
5519 | static struct abbrev_info * | |
e7c27a73 | 5520 | dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu) |
c906108c SS |
5521 | { |
5522 | unsigned int hash_number; | |
5523 | struct abbrev_info *abbrev; | |
5524 | ||
5525 | hash_number = number % ABBREV_HASH_SIZE; | |
f3dd6933 | 5526 | abbrev = cu->dwarf2_abbrevs[hash_number]; |
c906108c SS |
5527 | |
5528 | while (abbrev) | |
5529 | { | |
5530 | if (abbrev->number == number) | |
5531 | return abbrev; | |
5532 | else | |
5533 | abbrev = abbrev->next; | |
5534 | } | |
5535 | return NULL; | |
5536 | } | |
5537 | ||
72bf9492 DJ |
5538 | /* Returns nonzero if TAG represents a type that we might generate a partial |
5539 | symbol for. */ | |
5540 | ||
5541 | static int | |
5542 | is_type_tag_for_partial (int tag) | |
5543 | { | |
5544 | switch (tag) | |
5545 | { | |
5546 | #if 0 | |
5547 | /* Some types that would be reasonable to generate partial symbols for, | |
5548 | that we don't at present. */ | |
5549 | case DW_TAG_array_type: | |
5550 | case DW_TAG_file_type: | |
5551 | case DW_TAG_ptr_to_member_type: | |
5552 | case DW_TAG_set_type: | |
5553 | case DW_TAG_string_type: | |
5554 | case DW_TAG_subroutine_type: | |
5555 | #endif | |
5556 | case DW_TAG_base_type: | |
5557 | case DW_TAG_class_type: | |
680b30c7 | 5558 | case DW_TAG_interface_type: |
72bf9492 DJ |
5559 | case DW_TAG_enumeration_type: |
5560 | case DW_TAG_structure_type: | |
5561 | case DW_TAG_subrange_type: | |
5562 | case DW_TAG_typedef: | |
5563 | case DW_TAG_union_type: | |
5564 | return 1; | |
5565 | default: | |
5566 | return 0; | |
5567 | } | |
5568 | } | |
5569 | ||
5570 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
5571 | ||
5572 | static struct partial_die_info * | |
fe1b8b76 | 5573 | load_partial_dies (bfd *abfd, gdb_byte *info_ptr, int building_psymtab, |
72bf9492 DJ |
5574 | struct dwarf2_cu *cu) |
5575 | { | |
5576 | struct partial_die_info *part_die; | |
5577 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
5578 | struct abbrev_info *abbrev; | |
5579 | unsigned int bytes_read; | |
5afb4e99 | 5580 | unsigned int load_all = 0; |
72bf9492 DJ |
5581 | |
5582 | int nesting_level = 1; | |
5583 | ||
5584 | parent_die = NULL; | |
5585 | last_die = NULL; | |
5586 | ||
5afb4e99 DJ |
5587 | if (cu->per_cu && cu->per_cu->load_all_dies) |
5588 | load_all = 1; | |
5589 | ||
72bf9492 DJ |
5590 | cu->partial_dies |
5591 | = htab_create_alloc_ex (cu->header.length / 12, | |
5592 | partial_die_hash, | |
5593 | partial_die_eq, | |
5594 | NULL, | |
5595 | &cu->comp_unit_obstack, | |
5596 | hashtab_obstack_allocate, | |
5597 | dummy_obstack_deallocate); | |
5598 | ||
5599 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
5600 | sizeof (struct partial_die_info)); | |
5601 | ||
5602 | while (1) | |
5603 | { | |
5604 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
5605 | ||
5606 | /* A NULL abbrev means the end of a series of children. */ | |
5607 | if (abbrev == NULL) | |
5608 | { | |
5609 | if (--nesting_level == 0) | |
5610 | { | |
5611 | /* PART_DIE was probably the last thing allocated on the | |
5612 | comp_unit_obstack, so we could call obstack_free | |
5613 | here. We don't do that because the waste is small, | |
5614 | and will be cleaned up when we're done with this | |
5615 | compilation unit. This way, we're also more robust | |
5616 | against other users of the comp_unit_obstack. */ | |
5617 | return first_die; | |
5618 | } | |
5619 | info_ptr += bytes_read; | |
5620 | last_die = parent_die; | |
5621 | parent_die = parent_die->die_parent; | |
5622 | continue; | |
5623 | } | |
5624 | ||
5afb4e99 DJ |
5625 | /* Check whether this DIE is interesting enough to save. Normally |
5626 | we would not be interested in members here, but there may be | |
5627 | later variables referencing them via DW_AT_specification (for | |
5628 | static members). */ | |
5629 | if (!load_all | |
5630 | && !is_type_tag_for_partial (abbrev->tag) | |
72bf9492 DJ |
5631 | && abbrev->tag != DW_TAG_enumerator |
5632 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 5633 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 5634 | && abbrev->tag != DW_TAG_variable |
5afb4e99 DJ |
5635 | && abbrev->tag != DW_TAG_namespace |
5636 | && abbrev->tag != DW_TAG_member) | |
72bf9492 DJ |
5637 | { |
5638 | /* Otherwise we skip to the next sibling, if any. */ | |
5639 | info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu); | |
5640 | continue; | |
5641 | } | |
5642 | ||
5643 | info_ptr = read_partial_die (part_die, abbrev, bytes_read, | |
5644 | abfd, info_ptr, cu); | |
5645 | ||
5646 | /* This two-pass algorithm for processing partial symbols has a | |
5647 | high cost in cache pressure. Thus, handle some simple cases | |
5648 | here which cover the majority of C partial symbols. DIEs | |
5649 | which neither have specification tags in them, nor could have | |
5650 | specification tags elsewhere pointing at them, can simply be | |
5651 | processed and discarded. | |
5652 | ||
5653 | This segment is also optional; scan_partial_symbols and | |
5654 | add_partial_symbol will handle these DIEs if we chain | |
5655 | them in normally. When compilers which do not emit large | |
5656 | quantities of duplicate debug information are more common, | |
5657 | this code can probably be removed. */ | |
5658 | ||
5659 | /* Any complete simple types at the top level (pretty much all | |
5660 | of them, for a language without namespaces), can be processed | |
5661 | directly. */ | |
5662 | if (parent_die == NULL | |
5663 | && part_die->has_specification == 0 | |
5664 | && part_die->is_declaration == 0 | |
5665 | && (part_die->tag == DW_TAG_typedef | |
5666 | || part_die->tag == DW_TAG_base_type | |
5667 | || part_die->tag == DW_TAG_subrange_type)) | |
5668 | { | |
5669 | if (building_psymtab && part_die->name != NULL) | |
5670 | add_psymbol_to_list (part_die->name, strlen (part_die->name), | |
5671 | VAR_DOMAIN, LOC_TYPEDEF, | |
5672 | &cu->objfile->static_psymbols, | |
5673 | 0, (CORE_ADDR) 0, cu->language, cu->objfile); | |
5674 | info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu); | |
5675 | continue; | |
5676 | } | |
5677 | ||
5678 | /* If we're at the second level, and we're an enumerator, and | |
5679 | our parent has no specification (meaning possibly lives in a | |
5680 | namespace elsewhere), then we can add the partial symbol now | |
5681 | instead of queueing it. */ | |
5682 | if (part_die->tag == DW_TAG_enumerator | |
5683 | && parent_die != NULL | |
5684 | && parent_die->die_parent == NULL | |
5685 | && parent_die->tag == DW_TAG_enumeration_type | |
5686 | && parent_die->has_specification == 0) | |
5687 | { | |
5688 | if (part_die->name == NULL) | |
e2e0b3e5 | 5689 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
72bf9492 DJ |
5690 | else if (building_psymtab) |
5691 | add_psymbol_to_list (part_die->name, strlen (part_die->name), | |
5692 | VAR_DOMAIN, LOC_CONST, | |
987504bb JJ |
5693 | (cu->language == language_cplus |
5694 | || cu->language == language_java) | |
72bf9492 DJ |
5695 | ? &cu->objfile->global_psymbols |
5696 | : &cu->objfile->static_psymbols, | |
5697 | 0, (CORE_ADDR) 0, cu->language, cu->objfile); | |
5698 | ||
5699 | info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu); | |
5700 | continue; | |
5701 | } | |
5702 | ||
5703 | /* We'll save this DIE so link it in. */ | |
5704 | part_die->die_parent = parent_die; | |
5705 | part_die->die_sibling = NULL; | |
5706 | part_die->die_child = NULL; | |
5707 | ||
5708 | if (last_die && last_die == parent_die) | |
5709 | last_die->die_child = part_die; | |
5710 | else if (last_die) | |
5711 | last_die->die_sibling = part_die; | |
5712 | ||
5713 | last_die = part_die; | |
5714 | ||
5715 | if (first_die == NULL) | |
5716 | first_die = part_die; | |
5717 | ||
5718 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
5719 | find interesting need to be in the hash table, because we | |
5720 | also have the parent/sibling/child chains; only those that we | |
5721 | might refer to by offset later during partial symbol reading. | |
5722 | ||
5723 | For now this means things that might have be the target of a | |
5724 | DW_AT_specification, DW_AT_abstract_origin, or | |
5725 | DW_AT_extension. DW_AT_extension will refer only to | |
5726 | namespaces; DW_AT_abstract_origin refers to functions (and | |
5727 | many things under the function DIE, but we do not recurse | |
5728 | into function DIEs during partial symbol reading) and | |
5729 | possibly variables as well; DW_AT_specification refers to | |
5730 | declarations. Declarations ought to have the DW_AT_declaration | |
5731 | flag. It happens that GCC forgets to put it in sometimes, but | |
5732 | only for functions, not for types. | |
5733 | ||
5734 | Adding more things than necessary to the hash table is harmless | |
5735 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
5736 | wasted time in find_partial_die, when we reread the compilation |
5737 | unit with load_all_dies set. */ | |
72bf9492 | 5738 | |
5afb4e99 DJ |
5739 | if (load_all |
5740 | || abbrev->tag == DW_TAG_subprogram | |
72bf9492 DJ |
5741 | || abbrev->tag == DW_TAG_variable |
5742 | || abbrev->tag == DW_TAG_namespace | |
5743 | || part_die->is_declaration) | |
5744 | { | |
5745 | void **slot; | |
5746 | ||
5747 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
5748 | part_die->offset, INSERT); | |
5749 | *slot = part_die; | |
5750 | } | |
5751 | ||
5752 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
5753 | sizeof (struct partial_die_info)); | |
5754 | ||
5755 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 5756 | we have no reason to follow the children of structures; for other |
72bf9492 | 5757 | languages we have to, both so that we can get at method physnames |
bc30ff58 JB |
5758 | to infer fully qualified class names, and for DW_AT_specification. |
5759 | ||
5760 | For Ada, we need to scan the children of subprograms and lexical | |
5761 | blocks as well because Ada allows the definition of nested | |
5762 | entities that could be interesting for the debugger, such as | |
5763 | nested subprograms for instance. */ | |
72bf9492 | 5764 | if (last_die->has_children |
5afb4e99 DJ |
5765 | && (load_all |
5766 | || last_die->tag == DW_TAG_namespace | |
72bf9492 DJ |
5767 | || last_die->tag == DW_TAG_enumeration_type |
5768 | || (cu->language != language_c | |
5769 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 5770 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 5771 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
5772 | || last_die->tag == DW_TAG_union_type)) |
5773 | || (cu->language == language_ada | |
5774 | && (last_die->tag == DW_TAG_subprogram | |
5775 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
5776 | { |
5777 | nesting_level++; | |
5778 | parent_die = last_die; | |
5779 | continue; | |
5780 | } | |
5781 | ||
5782 | /* Otherwise we skip to the next sibling, if any. */ | |
5783 | info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu); | |
5784 | ||
5785 | /* Back to the top, do it again. */ | |
5786 | } | |
5787 | } | |
5788 | ||
c906108c SS |
5789 | /* Read a minimal amount of information into the minimal die structure. */ |
5790 | ||
fe1b8b76 | 5791 | static gdb_byte * |
72bf9492 DJ |
5792 | read_partial_die (struct partial_die_info *part_die, |
5793 | struct abbrev_info *abbrev, | |
5794 | unsigned int abbrev_len, bfd *abfd, | |
fe1b8b76 | 5795 | gdb_byte *info_ptr, struct dwarf2_cu *cu) |
c906108c | 5796 | { |
72bf9492 | 5797 | unsigned int bytes_read, i; |
c906108c | 5798 | struct attribute attr; |
c5aa993b | 5799 | int has_low_pc_attr = 0; |
c906108c | 5800 | int has_high_pc_attr = 0; |
e7030f15 | 5801 | CORE_ADDR base_address = 0; |
85cbf3d3 JK |
5802 | enum |
5803 | { | |
5804 | base_address_none, | |
5805 | base_address_low_pc, | |
5806 | /* Overrides BASE_ADDRESS_LOW_PC. */ | |
5807 | base_address_entry_pc | |
5808 | } | |
5809 | base_address_type = base_address_none; | |
c906108c | 5810 | |
72bf9492 | 5811 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 5812 | |
6502dd73 | 5813 | part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer; |
72bf9492 DJ |
5814 | |
5815 | info_ptr += abbrev_len; | |
5816 | ||
5817 | if (abbrev == NULL) | |
5818 | return info_ptr; | |
5819 | ||
c906108c SS |
5820 | part_die->tag = abbrev->tag; |
5821 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
5822 | |
5823 | for (i = 0; i < abbrev->num_attrs; ++i) | |
5824 | { | |
e7c27a73 | 5825 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu); |
c906108c SS |
5826 | |
5827 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 5828 | partial symbol table. */ |
c906108c SS |
5829 | switch (attr.name) |
5830 | { | |
5831 | case DW_AT_name: | |
5832 | ||
5833 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ | |
5834 | if (part_die->name == NULL) | |
5835 | part_die->name = DW_STRING (&attr); | |
5836 | break; | |
57c22c6c BR |
5837 | case DW_AT_comp_dir: |
5838 | if (part_die->dirname == NULL) | |
5839 | part_die->dirname = DW_STRING (&attr); | |
5840 | break; | |
c906108c SS |
5841 | case DW_AT_MIPS_linkage_name: |
5842 | part_die->name = DW_STRING (&attr); | |
5843 | break; | |
5844 | case DW_AT_low_pc: | |
5845 | has_low_pc_attr = 1; | |
5846 | part_die->lowpc = DW_ADDR (&attr); | |
85cbf3d3 JK |
5847 | if (part_die->tag == DW_TAG_compile_unit |
5848 | && base_address_type < base_address_low_pc) | |
5849 | { | |
5850 | base_address = DW_ADDR (&attr); | |
5851 | base_address_type = base_address_low_pc; | |
5852 | } | |
c906108c SS |
5853 | break; |
5854 | case DW_AT_high_pc: | |
5855 | has_high_pc_attr = 1; | |
5856 | part_die->highpc = DW_ADDR (&attr); | |
5857 | break; | |
85cbf3d3 JK |
5858 | case DW_AT_entry_pc: |
5859 | if (part_die->tag == DW_TAG_compile_unit | |
5860 | && base_address_type < base_address_entry_pc) | |
5861 | { | |
5862 | base_address = DW_ADDR (&attr); | |
5863 | base_address_type = base_address_entry_pc; | |
5864 | } | |
5865 | break; | |
43039443 | 5866 | case DW_AT_ranges: |
ff013f42 JK |
5867 | if (part_die->tag == DW_TAG_compile_unit) |
5868 | { | |
5869 | cu->ranges_offset = DW_UNSND (&attr); | |
5870 | cu->has_ranges_offset = 1; | |
5871 | } | |
43039443 | 5872 | break; |
c906108c | 5873 | case DW_AT_location: |
8e19ed76 PS |
5874 | /* Support the .debug_loc offsets */ |
5875 | if (attr_form_is_block (&attr)) | |
5876 | { | |
5877 | part_die->locdesc = DW_BLOCK (&attr); | |
5878 | } | |
3690dd37 | 5879 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 5880 | { |
4d3c2250 | 5881 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
5882 | } |
5883 | else | |
5884 | { | |
4d3c2250 KB |
5885 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
5886 | "partial symbol information"); | |
8e19ed76 | 5887 | } |
c906108c SS |
5888 | break; |
5889 | case DW_AT_language: | |
5890 | part_die->language = DW_UNSND (&attr); | |
5891 | break; | |
5892 | case DW_AT_external: | |
5893 | part_die->is_external = DW_UNSND (&attr); | |
5894 | break; | |
5895 | case DW_AT_declaration: | |
5896 | part_die->is_declaration = DW_UNSND (&attr); | |
5897 | break; | |
5898 | case DW_AT_type: | |
5899 | part_die->has_type = 1; | |
5900 | break; | |
5901 | case DW_AT_abstract_origin: | |
5902 | case DW_AT_specification: | |
72bf9492 DJ |
5903 | case DW_AT_extension: |
5904 | part_die->has_specification = 1; | |
5905 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu); | |
c906108c SS |
5906 | break; |
5907 | case DW_AT_sibling: | |
5908 | /* Ignore absolute siblings, they might point outside of | |
5909 | the current compile unit. */ | |
5910 | if (attr.form == DW_FORM_ref_addr) | |
e2e0b3e5 | 5911 | complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling")); |
c906108c | 5912 | else |
6502dd73 DJ |
5913 | part_die->sibling = dwarf2_per_objfile->info_buffer |
5914 | + dwarf2_get_ref_die_offset (&attr, cu); | |
c906108c | 5915 | break; |
aaa75496 JB |
5916 | case DW_AT_stmt_list: |
5917 | part_die->has_stmt_list = 1; | |
5918 | part_die->line_offset = DW_UNSND (&attr); | |
5919 | break; | |
fa4028e9 JB |
5920 | case DW_AT_byte_size: |
5921 | part_die->has_byte_size = 1; | |
5922 | break; | |
68511cec CES |
5923 | case DW_AT_calling_convention: |
5924 | /* DWARF doesn't provide a way to identify a program's source-level | |
5925 | entry point. DW_AT_calling_convention attributes are only meant | |
5926 | to describe functions' calling conventions. | |
5927 | ||
5928 | However, because it's a necessary piece of information in | |
5929 | Fortran, and because DW_CC_program is the only piece of debugging | |
5930 | information whose definition refers to a 'main program' at all, | |
5931 | several compilers have begun marking Fortran main programs with | |
5932 | DW_CC_program --- even when those functions use the standard | |
5933 | calling conventions. | |
5934 | ||
5935 | So until DWARF specifies a way to provide this information and | |
5936 | compilers pick up the new representation, we'll support this | |
5937 | practice. */ | |
5938 | if (DW_UNSND (&attr) == DW_CC_program | |
5939 | && cu->language == language_fortran) | |
5940 | set_main_name (part_die->name); | |
5941 | break; | |
c906108c SS |
5942 | default: |
5943 | break; | |
5944 | } | |
5945 | } | |
5946 | ||
c906108c SS |
5947 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
5948 | eliminate duplicate copies of functions and vtables and such. | |
5949 | The linker will arbitrarily choose one and discard the others. | |
5950 | The AT_*_pc values for such functions refer to local labels in | |
5951 | these sections. If the section from that file was discarded, the | |
5952 | labels are not in the output, so the relocs get a value of 0. | |
5953 | If this is a discarded function, mark the pc bounds as invalid, | |
5954 | so that GDB will ignore it. */ | |
5955 | if (has_low_pc_attr && has_high_pc_attr | |
5956 | && part_die->lowpc < part_die->highpc | |
5957 | && (part_die->lowpc != 0 | |
72dca2f5 | 5958 | || dwarf2_per_objfile->has_section_at_zero)) |
0b010bcc | 5959 | part_die->has_pc_info = 1; |
85cbf3d3 | 5960 | |
d00adf39 | 5961 | if (base_address_type != base_address_none && !cu->base_known) |
85cbf3d3 JK |
5962 | { |
5963 | gdb_assert (part_die->tag == DW_TAG_compile_unit); | |
d00adf39 DE |
5964 | cu->base_known = 1; |
5965 | cu->base_address = base_address; | |
85cbf3d3 JK |
5966 | } |
5967 | ||
c906108c SS |
5968 | return info_ptr; |
5969 | } | |
5970 | ||
72bf9492 DJ |
5971 | /* Find a cached partial DIE at OFFSET in CU. */ |
5972 | ||
5973 | static struct partial_die_info * | |
5974 | find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu) | |
5975 | { | |
5976 | struct partial_die_info *lookup_die = NULL; | |
5977 | struct partial_die_info part_die; | |
5978 | ||
5979 | part_die.offset = offset; | |
5980 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset); | |
5981 | ||
72bf9492 DJ |
5982 | return lookup_die; |
5983 | } | |
5984 | ||
5985 | /* Find a partial DIE at OFFSET, which may or may not be in CU. */ | |
5986 | ||
5987 | static struct partial_die_info * | |
10b3939b | 5988 | find_partial_die (unsigned long offset, struct dwarf2_cu *cu) |
72bf9492 | 5989 | { |
5afb4e99 DJ |
5990 | struct dwarf2_per_cu_data *per_cu = NULL; |
5991 | struct partial_die_info *pd = NULL; | |
72bf9492 DJ |
5992 | |
5993 | if (offset >= cu->header.offset | |
5994 | && offset < cu->header.offset + cu->header.length) | |
5afb4e99 DJ |
5995 | { |
5996 | pd = find_partial_die_in_comp_unit (offset, cu); | |
5997 | if (pd != NULL) | |
5998 | return pd; | |
5999 | } | |
72bf9492 | 6000 | |
ae038cb0 DJ |
6001 | per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile); |
6002 | ||
ae038cb0 DJ |
6003 | if (per_cu->cu == NULL) |
6004 | { | |
6005 | load_comp_unit (per_cu, cu->objfile); | |
6006 | per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6007 | dwarf2_per_objfile->read_in_chain = per_cu; | |
6008 | } | |
6009 | ||
6010 | per_cu->cu->last_used = 0; | |
5afb4e99 DJ |
6011 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); |
6012 | ||
6013 | if (pd == NULL && per_cu->load_all_dies == 0) | |
6014 | { | |
6015 | struct cleanup *back_to; | |
6016 | struct partial_die_info comp_unit_die; | |
6017 | struct abbrev_info *abbrev; | |
6018 | unsigned int bytes_read; | |
6019 | char *info_ptr; | |
6020 | ||
6021 | per_cu->load_all_dies = 1; | |
6022 | ||
6023 | /* Re-read the DIEs. */ | |
6024 | back_to = make_cleanup (null_cleanup, 0); | |
6025 | if (per_cu->cu->dwarf2_abbrevs == NULL) | |
6026 | { | |
6027 | dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu); | |
6028 | back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu); | |
6029 | } | |
d00adf39 DE |
6030 | info_ptr = (dwarf2_per_objfile->info_buffer |
6031 | + per_cu->cu->header.offset | |
6032 | + per_cu->cu->header.first_die_offset); | |
5afb4e99 DJ |
6033 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu); |
6034 | info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, | |
6035 | per_cu->cu->objfile->obfd, info_ptr, | |
6036 | per_cu->cu); | |
6037 | if (comp_unit_die.has_children) | |
6038 | load_partial_dies (per_cu->cu->objfile->obfd, info_ptr, 0, per_cu->cu); | |
6039 | do_cleanups (back_to); | |
6040 | ||
6041 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
6042 | } | |
6043 | ||
6044 | if (pd == NULL) | |
6045 | internal_error (__FILE__, __LINE__, | |
6046 | _("could not find partial DIE 0x%lx in cache [from module %s]\n"), | |
6047 | offset, bfd_get_filename (cu->objfile->obfd)); | |
6048 | return pd; | |
72bf9492 DJ |
6049 | } |
6050 | ||
6051 | /* Adjust PART_DIE before generating a symbol for it. This function | |
6052 | may set the is_external flag or change the DIE's name. */ | |
6053 | ||
6054 | static void | |
6055 | fixup_partial_die (struct partial_die_info *part_die, | |
6056 | struct dwarf2_cu *cu) | |
6057 | { | |
6058 | /* If we found a reference attribute and the DIE has no name, try | |
6059 | to find a name in the referred to DIE. */ | |
6060 | ||
6061 | if (part_die->name == NULL && part_die->has_specification) | |
6062 | { | |
6063 | struct partial_die_info *spec_die; | |
72bf9492 | 6064 | |
10b3939b | 6065 | spec_die = find_partial_die (part_die->spec_offset, cu); |
72bf9492 | 6066 | |
10b3939b | 6067 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
6068 | |
6069 | if (spec_die->name) | |
6070 | { | |
6071 | part_die->name = spec_die->name; | |
6072 | ||
6073 | /* Copy DW_AT_external attribute if it is set. */ | |
6074 | if (spec_die->is_external) | |
6075 | part_die->is_external = spec_die->is_external; | |
6076 | } | |
6077 | } | |
6078 | ||
6079 | /* Set default names for some unnamed DIEs. */ | |
6080 | if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type | |
6081 | || part_die->tag == DW_TAG_class_type)) | |
6082 | part_die->name = "(anonymous class)"; | |
6083 | ||
6084 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
6085 | part_die->name = "(anonymous namespace)"; | |
6086 | ||
6087 | if (part_die->tag == DW_TAG_structure_type | |
6088 | || part_die->tag == DW_TAG_class_type | |
6089 | || part_die->tag == DW_TAG_union_type) | |
6090 | guess_structure_name (part_die, cu); | |
6091 | } | |
6092 | ||
639d11d3 DC |
6093 | /* Read the die from the .debug_info section buffer. Set DIEP to |
6094 | point to a newly allocated die with its information, except for its | |
6095 | child, sibling, and parent fields. Set HAS_CHILDREN to tell | |
6096 | whether the die has children or not. */ | |
c906108c | 6097 | |
fe1b8b76 JB |
6098 | static gdb_byte * |
6099 | read_full_die (struct die_info **diep, bfd *abfd, gdb_byte *info_ptr, | |
e7c27a73 | 6100 | struct dwarf2_cu *cu, int *has_children) |
c906108c SS |
6101 | { |
6102 | unsigned int abbrev_number, bytes_read, i, offset; | |
6103 | struct abbrev_info *abbrev; | |
6104 | struct die_info *die; | |
6105 | ||
6502dd73 | 6106 | offset = info_ptr - dwarf2_per_objfile->info_buffer; |
c906108c SS |
6107 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6108 | info_ptr += bytes_read; | |
6109 | if (!abbrev_number) | |
6110 | { | |
1d325ec1 | 6111 | *diep = NULL; |
639d11d3 | 6112 | *has_children = 0; |
c906108c SS |
6113 | return info_ptr; |
6114 | } | |
6115 | ||
e7c27a73 | 6116 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); |
c906108c SS |
6117 | if (!abbrev) |
6118 | { | |
8a3fe4f8 | 6119 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
72bf9492 | 6120 | abbrev_number, |
639d11d3 | 6121 | bfd_get_filename (abfd)); |
c906108c | 6122 | } |
b60c80d6 | 6123 | die = dwarf_alloc_die (cu, abbrev->num_attrs); |
c906108c SS |
6124 | die->offset = offset; |
6125 | die->tag = abbrev->tag; | |
c906108c | 6126 | die->abbrev = abbrev_number; |
c906108c SS |
6127 | |
6128 | die->num_attrs = abbrev->num_attrs; | |
c906108c SS |
6129 | |
6130 | for (i = 0; i < abbrev->num_attrs; ++i) | |
03dd20cc DJ |
6131 | info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], |
6132 | abfd, info_ptr, cu); | |
c906108c SS |
6133 | |
6134 | *diep = die; | |
639d11d3 | 6135 | *has_children = abbrev->has_children; |
c906108c SS |
6136 | return info_ptr; |
6137 | } | |
6138 | ||
a8329558 | 6139 | /* Read an attribute value described by an attribute form. */ |
c906108c | 6140 | |
fe1b8b76 | 6141 | static gdb_byte * |
a8329558 | 6142 | read_attribute_value (struct attribute *attr, unsigned form, |
fe1b8b76 | 6143 | bfd *abfd, gdb_byte *info_ptr, |
e7c27a73 | 6144 | struct dwarf2_cu *cu) |
c906108c | 6145 | { |
e7c27a73 | 6146 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
6147 | unsigned int bytes_read; |
6148 | struct dwarf_block *blk; | |
6149 | ||
a8329558 KW |
6150 | attr->form = form; |
6151 | switch (form) | |
c906108c SS |
6152 | { |
6153 | case DW_FORM_addr: | |
6154 | case DW_FORM_ref_addr: | |
e7c27a73 | 6155 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 6156 | info_ptr += bytes_read; |
c906108c SS |
6157 | break; |
6158 | case DW_FORM_block2: | |
7b5a2f43 | 6159 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6160 | blk->size = read_2_bytes (abfd, info_ptr); |
6161 | info_ptr += 2; | |
6162 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6163 | info_ptr += blk->size; | |
6164 | DW_BLOCK (attr) = blk; | |
6165 | break; | |
6166 | case DW_FORM_block4: | |
7b5a2f43 | 6167 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6168 | blk->size = read_4_bytes (abfd, info_ptr); |
6169 | info_ptr += 4; | |
6170 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6171 | info_ptr += blk->size; | |
6172 | DW_BLOCK (attr) = blk; | |
6173 | break; | |
6174 | case DW_FORM_data2: | |
6175 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
6176 | info_ptr += 2; | |
6177 | break; | |
6178 | case DW_FORM_data4: | |
6179 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
6180 | info_ptr += 4; | |
6181 | break; | |
6182 | case DW_FORM_data8: | |
6183 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
6184 | info_ptr += 8; | |
6185 | break; | |
6186 | case DW_FORM_string: | |
6187 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); | |
6188 | info_ptr += bytes_read; | |
6189 | break; | |
4bdf3d34 JJ |
6190 | case DW_FORM_strp: |
6191 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
6192 | &bytes_read); | |
6193 | info_ptr += bytes_read; | |
6194 | break; | |
c906108c | 6195 | case DW_FORM_block: |
7b5a2f43 | 6196 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6197 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6198 | info_ptr += bytes_read; | |
6199 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6200 | info_ptr += blk->size; | |
6201 | DW_BLOCK (attr) = blk; | |
6202 | break; | |
6203 | case DW_FORM_block1: | |
7b5a2f43 | 6204 | blk = dwarf_alloc_block (cu); |
c906108c SS |
6205 | blk->size = read_1_byte (abfd, info_ptr); |
6206 | info_ptr += 1; | |
6207 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
6208 | info_ptr += blk->size; | |
6209 | DW_BLOCK (attr) = blk; | |
6210 | break; | |
6211 | case DW_FORM_data1: | |
6212 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
6213 | info_ptr += 1; | |
6214 | break; | |
6215 | case DW_FORM_flag: | |
6216 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
6217 | info_ptr += 1; | |
6218 | break; | |
6219 | case DW_FORM_sdata: | |
6220 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
6221 | info_ptr += bytes_read; | |
6222 | break; | |
6223 | case DW_FORM_udata: | |
6224 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6225 | info_ptr += bytes_read; | |
6226 | break; | |
6227 | case DW_FORM_ref1: | |
10b3939b | 6228 | DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr); |
c906108c SS |
6229 | info_ptr += 1; |
6230 | break; | |
6231 | case DW_FORM_ref2: | |
10b3939b | 6232 | DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr); |
c906108c SS |
6233 | info_ptr += 2; |
6234 | break; | |
6235 | case DW_FORM_ref4: | |
10b3939b | 6236 | DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr); |
c906108c SS |
6237 | info_ptr += 4; |
6238 | break; | |
613e1657 | 6239 | case DW_FORM_ref8: |
10b3939b | 6240 | DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr); |
613e1657 KB |
6241 | info_ptr += 8; |
6242 | break; | |
c906108c | 6243 | case DW_FORM_ref_udata: |
10b3939b DJ |
6244 | DW_ADDR (attr) = (cu->header.offset |
6245 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
6246 | info_ptr += bytes_read; |
6247 | break; | |
c906108c | 6248 | case DW_FORM_indirect: |
a8329558 KW |
6249 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
6250 | info_ptr += bytes_read; | |
e7c27a73 | 6251 | info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu); |
a8329558 | 6252 | break; |
c906108c | 6253 | default: |
8a3fe4f8 | 6254 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
6255 | dwarf_form_name (form), |
6256 | bfd_get_filename (abfd)); | |
c906108c | 6257 | } |
28e94949 JB |
6258 | |
6259 | /* We have seen instances where the compiler tried to emit a byte | |
6260 | size attribute of -1 which ended up being encoded as an unsigned | |
6261 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
6262 | an object of this size seems pretty unlikely so we can relatively | |
6263 | safely treat these cases as if the size attribute was invalid and | |
6264 | treat them as zero by default. */ | |
6265 | if (attr->name == DW_AT_byte_size | |
6266 | && form == DW_FORM_data4 | |
6267 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
6268 | { |
6269 | complaint | |
6270 | (&symfile_complaints, | |
6271 | _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"), | |
6272 | DW_UNSND (attr)); | |
6273 | DW_UNSND (attr) = 0; | |
6274 | } | |
28e94949 | 6275 | |
c906108c SS |
6276 | return info_ptr; |
6277 | } | |
6278 | ||
a8329558 KW |
6279 | /* Read an attribute described by an abbreviated attribute. */ |
6280 | ||
fe1b8b76 | 6281 | static gdb_byte * |
a8329558 | 6282 | read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, |
fe1b8b76 | 6283 | bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu) |
a8329558 KW |
6284 | { |
6285 | attr->name = abbrev->name; | |
e7c27a73 | 6286 | return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu); |
a8329558 KW |
6287 | } |
6288 | ||
c906108c SS |
6289 | /* read dwarf information from a buffer */ |
6290 | ||
6291 | static unsigned int | |
fe1b8b76 | 6292 | read_1_byte (bfd *abfd, gdb_byte *buf) |
c906108c | 6293 | { |
fe1b8b76 | 6294 | return bfd_get_8 (abfd, buf); |
c906108c SS |
6295 | } |
6296 | ||
6297 | static int | |
fe1b8b76 | 6298 | read_1_signed_byte (bfd *abfd, gdb_byte *buf) |
c906108c | 6299 | { |
fe1b8b76 | 6300 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
6301 | } |
6302 | ||
6303 | static unsigned int | |
fe1b8b76 | 6304 | read_2_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6305 | { |
fe1b8b76 | 6306 | return bfd_get_16 (abfd, buf); |
c906108c SS |
6307 | } |
6308 | ||
6309 | static int | |
fe1b8b76 | 6310 | read_2_signed_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6311 | { |
fe1b8b76 | 6312 | return bfd_get_signed_16 (abfd, buf); |
c906108c SS |
6313 | } |
6314 | ||
6315 | static unsigned int | |
fe1b8b76 | 6316 | read_4_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6317 | { |
fe1b8b76 | 6318 | return bfd_get_32 (abfd, buf); |
c906108c SS |
6319 | } |
6320 | ||
6321 | static int | |
fe1b8b76 | 6322 | read_4_signed_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6323 | { |
fe1b8b76 | 6324 | return bfd_get_signed_32 (abfd, buf); |
c906108c SS |
6325 | } |
6326 | ||
ce5d95e1 | 6327 | static unsigned long |
fe1b8b76 | 6328 | read_8_bytes (bfd *abfd, gdb_byte *buf) |
c906108c | 6329 | { |
fe1b8b76 | 6330 | return bfd_get_64 (abfd, buf); |
c906108c SS |
6331 | } |
6332 | ||
6333 | static CORE_ADDR | |
fe1b8b76 | 6334 | read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 6335 | unsigned int *bytes_read) |
c906108c | 6336 | { |
e7c27a73 | 6337 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
6338 | CORE_ADDR retval = 0; |
6339 | ||
107d2387 | 6340 | if (cu_header->signed_addr_p) |
c906108c | 6341 | { |
107d2387 AC |
6342 | switch (cu_header->addr_size) |
6343 | { | |
6344 | case 2: | |
fe1b8b76 | 6345 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
6346 | break; |
6347 | case 4: | |
fe1b8b76 | 6348 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
6349 | break; |
6350 | case 8: | |
fe1b8b76 | 6351 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
6352 | break; |
6353 | default: | |
8e65ff28 | 6354 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6355 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 6356 | bfd_get_filename (abfd)); |
107d2387 AC |
6357 | } |
6358 | } | |
6359 | else | |
6360 | { | |
6361 | switch (cu_header->addr_size) | |
6362 | { | |
6363 | case 2: | |
fe1b8b76 | 6364 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
6365 | break; |
6366 | case 4: | |
fe1b8b76 | 6367 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
6368 | break; |
6369 | case 8: | |
fe1b8b76 | 6370 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
6371 | break; |
6372 | default: | |
8e65ff28 | 6373 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6374 | _("read_address: bad switch, unsigned [in module %s]"), |
659b0389 | 6375 | bfd_get_filename (abfd)); |
107d2387 | 6376 | } |
c906108c | 6377 | } |
64367e0a | 6378 | |
107d2387 AC |
6379 | *bytes_read = cu_header->addr_size; |
6380 | return retval; | |
c906108c SS |
6381 | } |
6382 | ||
f7ef9339 | 6383 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
6384 | specification allows the initial length to take up either 4 bytes |
6385 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
6386 | bytes describe the length and all offsets will be 8 bytes in length | |
6387 | instead of 4. | |
6388 | ||
f7ef9339 KB |
6389 | An older, non-standard 64-bit format is also handled by this |
6390 | function. The older format in question stores the initial length | |
6391 | as an 8-byte quantity without an escape value. Lengths greater | |
6392 | than 2^32 aren't very common which means that the initial 4 bytes | |
6393 | is almost always zero. Since a length value of zero doesn't make | |
6394 | sense for the 32-bit format, this initial zero can be considered to | |
6395 | be an escape value which indicates the presence of the older 64-bit | |
6396 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
6397 | greater than 4GB. If it becomes necessary to handle lengths |
6398 | somewhat larger than 4GB, we could allow other small values (such | |
6399 | as the non-sensical values of 1, 2, and 3) to also be used as | |
6400 | escape values indicating the presence of the old format. | |
f7ef9339 | 6401 | |
917c78fc MK |
6402 | The value returned via bytes_read should be used to increment the |
6403 | relevant pointer after calling read_initial_length(). | |
613e1657 KB |
6404 | |
6405 | As a side effect, this function sets the fields initial_length_size | |
6406 | and offset_size in cu_header to the values appropriate for the | |
6407 | length field. (The format of the initial length field determines | |
dd373385 | 6408 | the width of file offsets to be fetched later with read_offset().) |
613e1657 KB |
6409 | |
6410 | [ Note: read_initial_length() and read_offset() are based on the | |
6411 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 6412 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
6413 | from: |
6414 | ||
f7ef9339 | 6415 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
613e1657 KB |
6416 | |
6417 | This document is only a draft and is subject to change. (So beware.) | |
6418 | ||
f7ef9339 | 6419 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
6420 | determined empirically by examining 64-bit ELF files produced by |
6421 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
6422 | |
6423 | - Kevin, July 16, 2002 | |
613e1657 KB |
6424 | ] */ |
6425 | ||
6426 | static LONGEST | |
fe1b8b76 | 6427 | read_initial_length (bfd *abfd, gdb_byte *buf, struct comp_unit_head *cu_header, |
891d2f0b | 6428 | unsigned int *bytes_read) |
613e1657 | 6429 | { |
fe1b8b76 | 6430 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 6431 | |
dd373385 | 6432 | if (length == 0xffffffff) |
613e1657 | 6433 | { |
fe1b8b76 | 6434 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 6435 | *bytes_read = 12; |
613e1657 | 6436 | } |
dd373385 | 6437 | else if (length == 0) |
f7ef9339 | 6438 | { |
dd373385 | 6439 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 6440 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 6441 | *bytes_read = 8; |
f7ef9339 | 6442 | } |
613e1657 KB |
6443 | else |
6444 | { | |
6445 | *bytes_read = 4; | |
613e1657 KB |
6446 | } |
6447 | ||
dd373385 EZ |
6448 | if (cu_header) |
6449 | { | |
6450 | gdb_assert (cu_header->initial_length_size == 0 | |
6451 | || cu_header->initial_length_size == 4 | |
6452 | || cu_header->initial_length_size == 8 | |
6453 | || cu_header->initial_length_size == 12); | |
6454 | ||
6455 | if (cu_header->initial_length_size != 0 | |
6456 | && cu_header->initial_length_size != *bytes_read) | |
6457 | complaint (&symfile_complaints, | |
6458 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
6459 | ||
6460 | cu_header->initial_length_size = *bytes_read; | |
6461 | cu_header->offset_size = (*bytes_read == 4) ? 4 : 8; | |
6462 | } | |
6463 | ||
6464 | return length; | |
613e1657 KB |
6465 | } |
6466 | ||
6467 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 6468 | given by cu_header->offset_size. */ |
613e1657 KB |
6469 | |
6470 | static LONGEST | |
fe1b8b76 | 6471 | read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header, |
891d2f0b | 6472 | unsigned int *bytes_read) |
613e1657 KB |
6473 | { |
6474 | LONGEST retval = 0; | |
6475 | ||
6476 | switch (cu_header->offset_size) | |
6477 | { | |
6478 | case 4: | |
fe1b8b76 | 6479 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
6480 | *bytes_read = 4; |
6481 | break; | |
6482 | case 8: | |
fe1b8b76 | 6483 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
6484 | *bytes_read = 8; |
6485 | break; | |
6486 | default: | |
8e65ff28 | 6487 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6488 | _("read_offset: bad switch [in module %s]"), |
659b0389 | 6489 | bfd_get_filename (abfd)); |
613e1657 KB |
6490 | } |
6491 | ||
917c78fc | 6492 | return retval; |
613e1657 KB |
6493 | } |
6494 | ||
fe1b8b76 JB |
6495 | static gdb_byte * |
6496 | read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size) | |
c906108c SS |
6497 | { |
6498 | /* If the size of a host char is 8 bits, we can return a pointer | |
6499 | to the buffer, otherwise we have to copy the data to a buffer | |
6500 | allocated on the temporary obstack. */ | |
4bdf3d34 | 6501 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 6502 | return buf; |
c906108c SS |
6503 | } |
6504 | ||
6505 | static char * | |
fe1b8b76 | 6506 | read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c SS |
6507 | { |
6508 | /* If the size of a host char is 8 bits, we can return a pointer | |
6509 | to the string, otherwise we have to copy the string to a buffer | |
6510 | allocated on the temporary obstack. */ | |
4bdf3d34 | 6511 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
6512 | if (*buf == '\0') |
6513 | { | |
6514 | *bytes_read_ptr = 1; | |
6515 | return NULL; | |
6516 | } | |
fe1b8b76 JB |
6517 | *bytes_read_ptr = strlen ((char *) buf) + 1; |
6518 | return (char *) buf; | |
4bdf3d34 JJ |
6519 | } |
6520 | ||
6521 | static char * | |
fe1b8b76 | 6522 | read_indirect_string (bfd *abfd, gdb_byte *buf, |
4bdf3d34 JJ |
6523 | const struct comp_unit_head *cu_header, |
6524 | unsigned int *bytes_read_ptr) | |
6525 | { | |
6526 | LONGEST str_offset = read_offset (abfd, buf, cu_header, | |
891d2f0b | 6527 | bytes_read_ptr); |
c906108c | 6528 | |
6502dd73 | 6529 | if (dwarf2_per_objfile->str_buffer == NULL) |
c906108c | 6530 | { |
8a3fe4f8 | 6531 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
659b0389 | 6532 | bfd_get_filename (abfd)); |
4bdf3d34 | 6533 | return NULL; |
c906108c | 6534 | } |
6502dd73 | 6535 | if (str_offset >= dwarf2_per_objfile->str_size) |
c906108c | 6536 | { |
8a3fe4f8 | 6537 | error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"), |
659b0389 | 6538 | bfd_get_filename (abfd)); |
c906108c SS |
6539 | return NULL; |
6540 | } | |
4bdf3d34 | 6541 | gdb_assert (HOST_CHAR_BIT == 8); |
6502dd73 | 6542 | if (dwarf2_per_objfile->str_buffer[str_offset] == '\0') |
4bdf3d34 | 6543 | return NULL; |
fe1b8b76 | 6544 | return (char *) (dwarf2_per_objfile->str_buffer + str_offset); |
c906108c SS |
6545 | } |
6546 | ||
ce5d95e1 | 6547 | static unsigned long |
fe1b8b76 | 6548 | read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 6549 | { |
ce5d95e1 JB |
6550 | unsigned long result; |
6551 | unsigned int num_read; | |
c906108c SS |
6552 | int i, shift; |
6553 | unsigned char byte; | |
6554 | ||
6555 | result = 0; | |
6556 | shift = 0; | |
6557 | num_read = 0; | |
6558 | i = 0; | |
6559 | while (1) | |
6560 | { | |
fe1b8b76 | 6561 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
6562 | buf++; |
6563 | num_read++; | |
ce5d95e1 | 6564 | result |= ((unsigned long)(byte & 127) << shift); |
c906108c SS |
6565 | if ((byte & 128) == 0) |
6566 | { | |
6567 | break; | |
6568 | } | |
6569 | shift += 7; | |
6570 | } | |
6571 | *bytes_read_ptr = num_read; | |
6572 | return result; | |
6573 | } | |
6574 | ||
ce5d95e1 | 6575 | static long |
fe1b8b76 | 6576 | read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 6577 | { |
ce5d95e1 | 6578 | long result; |
77e0b926 | 6579 | int i, shift, num_read; |
c906108c SS |
6580 | unsigned char byte; |
6581 | ||
6582 | result = 0; | |
6583 | shift = 0; | |
c906108c SS |
6584 | num_read = 0; |
6585 | i = 0; | |
6586 | while (1) | |
6587 | { | |
fe1b8b76 | 6588 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
6589 | buf++; |
6590 | num_read++; | |
ce5d95e1 | 6591 | result |= ((long)(byte & 127) << shift); |
c906108c SS |
6592 | shift += 7; |
6593 | if ((byte & 128) == 0) | |
6594 | { | |
6595 | break; | |
6596 | } | |
6597 | } | |
77e0b926 DJ |
6598 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
6599 | result |= -(((long)1) << shift); | |
c906108c SS |
6600 | *bytes_read_ptr = num_read; |
6601 | return result; | |
6602 | } | |
6603 | ||
4bb7a0a7 DJ |
6604 | /* Return a pointer to just past the end of an LEB128 number in BUF. */ |
6605 | ||
fe1b8b76 JB |
6606 | static gdb_byte * |
6607 | skip_leb128 (bfd *abfd, gdb_byte *buf) | |
4bb7a0a7 DJ |
6608 | { |
6609 | int byte; | |
6610 | ||
6611 | while (1) | |
6612 | { | |
fe1b8b76 | 6613 | byte = bfd_get_8 (abfd, buf); |
4bb7a0a7 DJ |
6614 | buf++; |
6615 | if ((byte & 128) == 0) | |
6616 | return buf; | |
6617 | } | |
6618 | } | |
6619 | ||
c906108c | 6620 | static void |
e142c38c | 6621 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
6622 | { |
6623 | switch (lang) | |
6624 | { | |
6625 | case DW_LANG_C89: | |
6626 | case DW_LANG_C: | |
e142c38c | 6627 | cu->language = language_c; |
c906108c SS |
6628 | break; |
6629 | case DW_LANG_C_plus_plus: | |
e142c38c | 6630 | cu->language = language_cplus; |
c906108c SS |
6631 | break; |
6632 | case DW_LANG_Fortran77: | |
6633 | case DW_LANG_Fortran90: | |
b21b22e0 | 6634 | case DW_LANG_Fortran95: |
e142c38c | 6635 | cu->language = language_fortran; |
c906108c SS |
6636 | break; |
6637 | case DW_LANG_Mips_Assembler: | |
e142c38c | 6638 | cu->language = language_asm; |
c906108c | 6639 | break; |
bebd888e | 6640 | case DW_LANG_Java: |
e142c38c | 6641 | cu->language = language_java; |
bebd888e | 6642 | break; |
c906108c | 6643 | case DW_LANG_Ada83: |
8aaf0b47 | 6644 | case DW_LANG_Ada95: |
bc5f45f8 JB |
6645 | cu->language = language_ada; |
6646 | break; | |
72019c9c GM |
6647 | case DW_LANG_Modula2: |
6648 | cu->language = language_m2; | |
6649 | break; | |
fe8e67fd PM |
6650 | case DW_LANG_Pascal83: |
6651 | cu->language = language_pascal; | |
6652 | break; | |
22566fbd DJ |
6653 | case DW_LANG_ObjC: |
6654 | cu->language = language_objc; | |
6655 | break; | |
c906108c SS |
6656 | case DW_LANG_Cobol74: |
6657 | case DW_LANG_Cobol85: | |
c906108c | 6658 | default: |
e142c38c | 6659 | cu->language = language_minimal; |
c906108c SS |
6660 | break; |
6661 | } | |
e142c38c | 6662 | cu->language_defn = language_def (cu->language); |
c906108c SS |
6663 | } |
6664 | ||
6665 | /* Return the named attribute or NULL if not there. */ | |
6666 | ||
6667 | static struct attribute * | |
e142c38c | 6668 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c SS |
6669 | { |
6670 | unsigned int i; | |
6671 | struct attribute *spec = NULL; | |
6672 | ||
6673 | for (i = 0; i < die->num_attrs; ++i) | |
6674 | { | |
6675 | if (die->attrs[i].name == name) | |
10b3939b | 6676 | return &die->attrs[i]; |
c906108c SS |
6677 | if (die->attrs[i].name == DW_AT_specification |
6678 | || die->attrs[i].name == DW_AT_abstract_origin) | |
6679 | spec = &die->attrs[i]; | |
6680 | } | |
c906108c | 6681 | |
10b3939b | 6682 | if (spec) |
f2f0e013 DJ |
6683 | { |
6684 | die = follow_die_ref (die, spec, &cu); | |
6685 | return dwarf2_attr (die, name, cu); | |
6686 | } | |
c5aa993b | 6687 | |
c906108c SS |
6688 | return NULL; |
6689 | } | |
6690 | ||
05cf31d1 JB |
6691 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
6692 | and holds a non-zero value. This function should only be used for | |
6693 | DW_FORM_flag attributes. */ | |
6694 | ||
6695 | static int | |
6696 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
6697 | { | |
6698 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
6699 | ||
6700 | return (attr && DW_UNSND (attr)); | |
6701 | } | |
6702 | ||
3ca72b44 | 6703 | static int |
e142c38c | 6704 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 6705 | { |
05cf31d1 JB |
6706 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
6707 | which value is non-zero. However, we have to be careful with | |
6708 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
6709 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
6710 | end up accidently finding a declaration attribute that belongs | |
6711 | to a different DIE referenced by the specification attribute, | |
6712 | even though the given DIE does not have a declaration attribute. */ | |
6713 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
6714 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
6715 | } |
6716 | ||
63d06c5c | 6717 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 DJ |
6718 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
6719 | containing the return value on output. */ | |
63d06c5c DC |
6720 | |
6721 | static struct die_info * | |
f2f0e013 | 6722 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 6723 | { |
f2f0e013 DJ |
6724 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
6725 | *spec_cu); | |
63d06c5c DC |
6726 | |
6727 | if (spec_attr == NULL) | |
6728 | return NULL; | |
6729 | else | |
f2f0e013 | 6730 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 6731 | } |
c906108c | 6732 | |
debd256d JB |
6733 | /* Free the line_header structure *LH, and any arrays and strings it |
6734 | refers to. */ | |
6735 | static void | |
6736 | free_line_header (struct line_header *lh) | |
6737 | { | |
6738 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 6739 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
6740 | |
6741 | /* Remember that all the lh->file_names[i].name pointers are | |
6742 | pointers into debug_line_buffer, and don't need to be freed. */ | |
6743 | if (lh->file_names) | |
a8bc7b56 | 6744 | xfree (lh->file_names); |
debd256d JB |
6745 | |
6746 | /* Similarly for the include directory names. */ | |
6747 | if (lh->include_dirs) | |
a8bc7b56 | 6748 | xfree (lh->include_dirs); |
debd256d | 6749 | |
a8bc7b56 | 6750 | xfree (lh); |
debd256d JB |
6751 | } |
6752 | ||
6753 | ||
6754 | /* Add an entry to LH's include directory table. */ | |
6755 | static void | |
6756 | add_include_dir (struct line_header *lh, char *include_dir) | |
c906108c | 6757 | { |
debd256d JB |
6758 | /* Grow the array if necessary. */ |
6759 | if (lh->include_dirs_size == 0) | |
c5aa993b | 6760 | { |
debd256d JB |
6761 | lh->include_dirs_size = 1; /* for testing */ |
6762 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
6763 | * sizeof (*lh->include_dirs)); | |
6764 | } | |
6765 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
6766 | { | |
6767 | lh->include_dirs_size *= 2; | |
6768 | lh->include_dirs = xrealloc (lh->include_dirs, | |
6769 | (lh->include_dirs_size | |
6770 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 6771 | } |
c906108c | 6772 | |
debd256d JB |
6773 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
6774 | } | |
6775 | ||
6776 | ||
6777 | /* Add an entry to LH's file name table. */ | |
6778 | static void | |
6779 | add_file_name (struct line_header *lh, | |
6780 | char *name, | |
6781 | unsigned int dir_index, | |
6782 | unsigned int mod_time, | |
6783 | unsigned int length) | |
6784 | { | |
6785 | struct file_entry *fe; | |
6786 | ||
6787 | /* Grow the array if necessary. */ | |
6788 | if (lh->file_names_size == 0) | |
6789 | { | |
6790 | lh->file_names_size = 1; /* for testing */ | |
6791 | lh->file_names = xmalloc (lh->file_names_size | |
6792 | * sizeof (*lh->file_names)); | |
6793 | } | |
6794 | else if (lh->num_file_names >= lh->file_names_size) | |
6795 | { | |
6796 | lh->file_names_size *= 2; | |
6797 | lh->file_names = xrealloc (lh->file_names, | |
6798 | (lh->file_names_size | |
6799 | * sizeof (*lh->file_names))); | |
6800 | } | |
6801 | ||
6802 | fe = &lh->file_names[lh->num_file_names++]; | |
6803 | fe->name = name; | |
6804 | fe->dir_index = dir_index; | |
6805 | fe->mod_time = mod_time; | |
6806 | fe->length = length; | |
aaa75496 | 6807 | fe->included_p = 0; |
cb1df416 | 6808 | fe->symtab = NULL; |
debd256d JB |
6809 | } |
6810 | ||
6811 | ||
6812 | /* Read the statement program header starting at OFFSET in | |
6502dd73 DJ |
6813 | .debug_line, according to the endianness of ABFD. Return a pointer |
6814 | to a struct line_header, allocated using xmalloc. | |
debd256d JB |
6815 | |
6816 | NOTE: the strings in the include directory and file name tables of | |
6817 | the returned object point into debug_line_buffer, and must not be | |
6818 | freed. */ | |
6819 | static struct line_header * | |
6820 | dwarf_decode_line_header (unsigned int offset, bfd *abfd, | |
e7c27a73 | 6821 | struct dwarf2_cu *cu) |
debd256d JB |
6822 | { |
6823 | struct cleanup *back_to; | |
6824 | struct line_header *lh; | |
fe1b8b76 | 6825 | gdb_byte *line_ptr; |
891d2f0b | 6826 | unsigned int bytes_read; |
debd256d JB |
6827 | int i; |
6828 | char *cur_dir, *cur_file; | |
6829 | ||
6502dd73 | 6830 | if (dwarf2_per_objfile->line_buffer == NULL) |
debd256d | 6831 | { |
e2e0b3e5 | 6832 | complaint (&symfile_complaints, _("missing .debug_line section")); |
debd256d JB |
6833 | return 0; |
6834 | } | |
6835 | ||
a738430d MK |
6836 | /* Make sure that at least there's room for the total_length field. |
6837 | That could be 12 bytes long, but we're just going to fudge that. */ | |
6502dd73 | 6838 | if (offset + 4 >= dwarf2_per_objfile->line_size) |
debd256d | 6839 | { |
4d3c2250 | 6840 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
6841 | return 0; |
6842 | } | |
6843 | ||
6844 | lh = xmalloc (sizeof (*lh)); | |
6845 | memset (lh, 0, sizeof (*lh)); | |
6846 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
6847 | (void *) lh); | |
6848 | ||
6502dd73 | 6849 | line_ptr = dwarf2_per_objfile->line_buffer + offset; |
debd256d | 6850 | |
a738430d | 6851 | /* Read in the header. */ |
dd373385 EZ |
6852 | lh->total_length = |
6853 | read_initial_length (abfd, line_ptr, &cu->header, &bytes_read); | |
debd256d | 6854 | line_ptr += bytes_read; |
6502dd73 DJ |
6855 | if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer |
6856 | + dwarf2_per_objfile->line_size)) | |
debd256d | 6857 | { |
4d3c2250 | 6858 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
6859 | return 0; |
6860 | } | |
6861 | lh->statement_program_end = line_ptr + lh->total_length; | |
6862 | lh->version = read_2_bytes (abfd, line_ptr); | |
6863 | line_ptr += 2; | |
e7c27a73 | 6864 | lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read); |
debd256d JB |
6865 | line_ptr += bytes_read; |
6866 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); | |
6867 | line_ptr += 1; | |
6868 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); | |
6869 | line_ptr += 1; | |
6870 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
6871 | line_ptr += 1; | |
6872 | lh->line_range = read_1_byte (abfd, line_ptr); | |
6873 | line_ptr += 1; | |
6874 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
6875 | line_ptr += 1; | |
6876 | lh->standard_opcode_lengths | |
fe1b8b76 | 6877 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
6878 | |
6879 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
6880 | for (i = 1; i < lh->opcode_base; ++i) | |
6881 | { | |
6882 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
6883 | line_ptr += 1; | |
6884 | } | |
6885 | ||
a738430d | 6886 | /* Read directory table. */ |
debd256d JB |
6887 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
6888 | { | |
6889 | line_ptr += bytes_read; | |
6890 | add_include_dir (lh, cur_dir); | |
6891 | } | |
6892 | line_ptr += bytes_read; | |
6893 | ||
a738430d | 6894 | /* Read file name table. */ |
debd256d JB |
6895 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
6896 | { | |
6897 | unsigned int dir_index, mod_time, length; | |
6898 | ||
6899 | line_ptr += bytes_read; | |
6900 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
6901 | line_ptr += bytes_read; | |
6902 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
6903 | line_ptr += bytes_read; | |
6904 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
6905 | line_ptr += bytes_read; | |
6906 | ||
6907 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
6908 | } | |
6909 | line_ptr += bytes_read; | |
6910 | lh->statement_program_start = line_ptr; | |
6911 | ||
6502dd73 DJ |
6912 | if (line_ptr > (dwarf2_per_objfile->line_buffer |
6913 | + dwarf2_per_objfile->line_size)) | |
4d3c2250 | 6914 | complaint (&symfile_complaints, |
e2e0b3e5 | 6915 | _("line number info header doesn't fit in `.debug_line' section")); |
debd256d JB |
6916 | |
6917 | discard_cleanups (back_to); | |
6918 | return lh; | |
6919 | } | |
c906108c | 6920 | |
5fb290d7 DJ |
6921 | /* This function exists to work around a bug in certain compilers |
6922 | (particularly GCC 2.95), in which the first line number marker of a | |
6923 | function does not show up until after the prologue, right before | |
6924 | the second line number marker. This function shifts ADDRESS down | |
6925 | to the beginning of the function if necessary, and is called on | |
6926 | addresses passed to record_line. */ | |
6927 | ||
6928 | static CORE_ADDR | |
e142c38c | 6929 | check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu) |
5fb290d7 DJ |
6930 | { |
6931 | struct function_range *fn; | |
6932 | ||
6933 | /* Find the function_range containing address. */ | |
e142c38c | 6934 | if (!cu->first_fn) |
5fb290d7 DJ |
6935 | return address; |
6936 | ||
e142c38c DJ |
6937 | if (!cu->cached_fn) |
6938 | cu->cached_fn = cu->first_fn; | |
5fb290d7 | 6939 | |
e142c38c | 6940 | fn = cu->cached_fn; |
5fb290d7 DJ |
6941 | while (fn) |
6942 | if (fn->lowpc <= address && fn->highpc > address) | |
6943 | goto found; | |
6944 | else | |
6945 | fn = fn->next; | |
6946 | ||
e142c38c DJ |
6947 | fn = cu->first_fn; |
6948 | while (fn && fn != cu->cached_fn) | |
5fb290d7 DJ |
6949 | if (fn->lowpc <= address && fn->highpc > address) |
6950 | goto found; | |
6951 | else | |
6952 | fn = fn->next; | |
6953 | ||
6954 | return address; | |
6955 | ||
6956 | found: | |
6957 | if (fn->seen_line) | |
6958 | return address; | |
6959 | if (address != fn->lowpc) | |
4d3c2250 | 6960 | complaint (&symfile_complaints, |
e2e0b3e5 | 6961 | _("misplaced first line number at 0x%lx for '%s'"), |
4d3c2250 | 6962 | (unsigned long) address, fn->name); |
5fb290d7 DJ |
6963 | fn->seen_line = 1; |
6964 | return fn->lowpc; | |
6965 | } | |
6966 | ||
aaa75496 JB |
6967 | /* Decode the Line Number Program (LNP) for the given line_header |
6968 | structure and CU. The actual information extracted and the type | |
6969 | of structures created from the LNP depends on the value of PST. | |
6970 | ||
6971 | 1. If PST is NULL, then this procedure uses the data from the program | |
6972 | to create all necessary symbol tables, and their linetables. | |
6973 | The compilation directory of the file is passed in COMP_DIR, | |
6974 | and must not be NULL. | |
6975 | ||
6976 | 2. If PST is not NULL, this procedure reads the program to determine | |
6977 | the list of files included by the unit represented by PST, and | |
6978 | builds all the associated partial symbol tables. In this case, | |
6979 | the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR | |
6980 | is not used to compute the full name of the symtab, and therefore | |
6981 | omitting it when building the partial symtab does not introduce | |
6982 | the potential for inconsistency - a partial symtab and its associated | |
6983 | symbtab having a different fullname -). */ | |
debd256d | 6984 | |
c906108c | 6985 | static void |
debd256d | 6986 | dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd, |
aaa75496 | 6987 | struct dwarf2_cu *cu, struct partial_symtab *pst) |
c906108c | 6988 | { |
a8c50c1f | 6989 | gdb_byte *line_ptr, *extended_end; |
fe1b8b76 | 6990 | gdb_byte *line_end; |
a8c50c1f | 6991 | unsigned int bytes_read, extended_len; |
c906108c | 6992 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
6993 | CORE_ADDR baseaddr; |
6994 | struct objfile *objfile = cu->objfile; | |
aaa75496 | 6995 | const int decode_for_pst_p = (pst != NULL); |
cb1df416 | 6996 | struct subfile *last_subfile = NULL, *first_subfile = current_subfile; |
e142c38c DJ |
6997 | |
6998 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6999 | |
debd256d JB |
7000 | line_ptr = lh->statement_program_start; |
7001 | line_end = lh->statement_program_end; | |
c906108c SS |
7002 | |
7003 | /* Read the statement sequences until there's nothing left. */ | |
7004 | while (line_ptr < line_end) | |
7005 | { | |
7006 | /* state machine registers */ | |
7007 | CORE_ADDR address = 0; | |
7008 | unsigned int file = 1; | |
7009 | unsigned int line = 1; | |
7010 | unsigned int column = 0; | |
debd256d | 7011 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
7012 | int basic_block = 0; |
7013 | int end_sequence = 0; | |
7014 | ||
aaa75496 | 7015 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 7016 | { |
aaa75496 | 7017 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
7018 | /* lh->include_dirs and lh->file_names are 0-based, but the |
7019 | directory and file name numbers in the statement program | |
7020 | are 1-based. */ | |
7021 | struct file_entry *fe = &lh->file_names[file - 1]; | |
4f1520fb | 7022 | char *dir = NULL; |
a738430d | 7023 | |
debd256d JB |
7024 | if (fe->dir_index) |
7025 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
7026 | |
7027 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
7028 | } |
7029 | ||
a738430d | 7030 | /* Decode the table. */ |
c5aa993b | 7031 | while (!end_sequence) |
c906108c SS |
7032 | { |
7033 | op_code = read_1_byte (abfd, line_ptr); | |
7034 | line_ptr += 1; | |
9aa1fe7e | 7035 | |
debd256d | 7036 | if (op_code >= lh->opcode_base) |
a738430d MK |
7037 | { |
7038 | /* Special operand. */ | |
debd256d JB |
7039 | adj_opcode = op_code - lh->opcode_base; |
7040 | address += (adj_opcode / lh->line_range) | |
7041 | * lh->minimum_instruction_length; | |
7042 | line += lh->line_base + (adj_opcode % lh->line_range); | |
25e43795 DJ |
7043 | if (lh->num_file_names < file) |
7044 | dwarf2_debug_line_missing_file_complaint (); | |
7045 | else | |
7046 | { | |
7047 | lh->file_names[file - 1].included_p = 1; | |
7048 | if (!decode_for_pst_p) | |
7049 | { | |
7050 | if (last_subfile != current_subfile) | |
7051 | { | |
7052 | if (last_subfile) | |
7053 | record_line (last_subfile, 0, address); | |
7054 | last_subfile = current_subfile; | |
7055 | } | |
7056 | /* Append row to matrix using current values. */ | |
7057 | record_line (current_subfile, line, | |
7058 | check_cu_functions (address, cu)); | |
366da635 | 7059 | } |
25e43795 | 7060 | } |
9aa1fe7e GK |
7061 | basic_block = 1; |
7062 | } | |
7063 | else switch (op_code) | |
c906108c SS |
7064 | { |
7065 | case DW_LNS_extended_op: | |
a8c50c1f | 7066 | extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
473b7be6 | 7067 | line_ptr += bytes_read; |
a8c50c1f | 7068 | extended_end = line_ptr + extended_len; |
c906108c SS |
7069 | extended_op = read_1_byte (abfd, line_ptr); |
7070 | line_ptr += 1; | |
7071 | switch (extended_op) | |
7072 | { | |
7073 | case DW_LNE_end_sequence: | |
7074 | end_sequence = 1; | |
25e43795 DJ |
7075 | |
7076 | if (lh->num_file_names < file) | |
7077 | dwarf2_debug_line_missing_file_complaint (); | |
7078 | else | |
7079 | { | |
7080 | lh->file_names[file - 1].included_p = 1; | |
7081 | if (!decode_for_pst_p) | |
7082 | record_line (current_subfile, 0, address); | |
7083 | } | |
c906108c SS |
7084 | break; |
7085 | case DW_LNE_set_address: | |
e7c27a73 | 7086 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
107d2387 AC |
7087 | line_ptr += bytes_read; |
7088 | address += baseaddr; | |
c906108c SS |
7089 | break; |
7090 | case DW_LNE_define_file: | |
debd256d JB |
7091 | { |
7092 | char *cur_file; | |
7093 | unsigned int dir_index, mod_time, length; | |
7094 | ||
7095 | cur_file = read_string (abfd, line_ptr, &bytes_read); | |
7096 | line_ptr += bytes_read; | |
7097 | dir_index = | |
7098 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7099 | line_ptr += bytes_read; | |
7100 | mod_time = | |
7101 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7102 | line_ptr += bytes_read; | |
7103 | length = | |
7104 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7105 | line_ptr += bytes_read; | |
7106 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
7107 | } | |
c906108c SS |
7108 | break; |
7109 | default: | |
4d3c2250 | 7110 | complaint (&symfile_complaints, |
e2e0b3e5 | 7111 | _("mangled .debug_line section")); |
debd256d | 7112 | return; |
c906108c | 7113 | } |
a8c50c1f DJ |
7114 | /* Make sure that we parsed the extended op correctly. If e.g. |
7115 | we expected a different address size than the producer used, | |
7116 | we may have read the wrong number of bytes. */ | |
7117 | if (line_ptr != extended_end) | |
7118 | { | |
7119 | complaint (&symfile_complaints, | |
7120 | _("mangled .debug_line section")); | |
7121 | return; | |
7122 | } | |
c906108c SS |
7123 | break; |
7124 | case DW_LNS_copy: | |
25e43795 DJ |
7125 | if (lh->num_file_names < file) |
7126 | dwarf2_debug_line_missing_file_complaint (); | |
7127 | else | |
366da635 | 7128 | { |
25e43795 DJ |
7129 | lh->file_names[file - 1].included_p = 1; |
7130 | if (!decode_for_pst_p) | |
7131 | { | |
7132 | if (last_subfile != current_subfile) | |
7133 | { | |
7134 | if (last_subfile) | |
7135 | record_line (last_subfile, 0, address); | |
7136 | last_subfile = current_subfile; | |
7137 | } | |
7138 | record_line (current_subfile, line, | |
7139 | check_cu_functions (address, cu)); | |
7140 | } | |
366da635 | 7141 | } |
c906108c SS |
7142 | basic_block = 0; |
7143 | break; | |
7144 | case DW_LNS_advance_pc: | |
debd256d | 7145 | address += lh->minimum_instruction_length |
c906108c SS |
7146 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
7147 | line_ptr += bytes_read; | |
7148 | break; | |
7149 | case DW_LNS_advance_line: | |
7150 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
7151 | line_ptr += bytes_read; | |
7152 | break; | |
7153 | case DW_LNS_set_file: | |
debd256d | 7154 | { |
a738430d MK |
7155 | /* The arrays lh->include_dirs and lh->file_names are |
7156 | 0-based, but the directory and file name numbers in | |
7157 | the statement program are 1-based. */ | |
debd256d | 7158 | struct file_entry *fe; |
4f1520fb | 7159 | char *dir = NULL; |
a738430d | 7160 | |
debd256d JB |
7161 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
7162 | line_ptr += bytes_read; | |
25e43795 DJ |
7163 | if (lh->num_file_names < file) |
7164 | dwarf2_debug_line_missing_file_complaint (); | |
7165 | else | |
7166 | { | |
7167 | fe = &lh->file_names[file - 1]; | |
7168 | if (fe->dir_index) | |
7169 | dir = lh->include_dirs[fe->dir_index - 1]; | |
7170 | if (!decode_for_pst_p) | |
7171 | { | |
7172 | last_subfile = current_subfile; | |
7173 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
7174 | } | |
7175 | } | |
debd256d | 7176 | } |
c906108c SS |
7177 | break; |
7178 | case DW_LNS_set_column: | |
7179 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7180 | line_ptr += bytes_read; | |
7181 | break; | |
7182 | case DW_LNS_negate_stmt: | |
7183 | is_stmt = (!is_stmt); | |
7184 | break; | |
7185 | case DW_LNS_set_basic_block: | |
7186 | basic_block = 1; | |
7187 | break; | |
c2c6d25f JM |
7188 | /* Add to the address register of the state machine the |
7189 | address increment value corresponding to special opcode | |
a738430d MK |
7190 | 255. I.e., this value is scaled by the minimum |
7191 | instruction length since special opcode 255 would have | |
7192 | scaled the the increment. */ | |
c906108c | 7193 | case DW_LNS_const_add_pc: |
debd256d JB |
7194 | address += (lh->minimum_instruction_length |
7195 | * ((255 - lh->opcode_base) / lh->line_range)); | |
c906108c SS |
7196 | break; |
7197 | case DW_LNS_fixed_advance_pc: | |
7198 | address += read_2_bytes (abfd, line_ptr); | |
7199 | line_ptr += 2; | |
7200 | break; | |
9aa1fe7e | 7201 | default: |
a738430d MK |
7202 | { |
7203 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 7204 | int i; |
a738430d | 7205 | |
debd256d | 7206 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
7207 | { |
7208 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
7209 | line_ptr += bytes_read; | |
7210 | } | |
7211 | } | |
c906108c SS |
7212 | } |
7213 | } | |
7214 | } | |
aaa75496 JB |
7215 | |
7216 | if (decode_for_pst_p) | |
7217 | { | |
7218 | int file_index; | |
7219 | ||
7220 | /* Now that we're done scanning the Line Header Program, we can | |
7221 | create the psymtab of each included file. */ | |
7222 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
7223 | if (lh->file_names[file_index].included_p == 1) | |
7224 | { | |
5b5464ad JB |
7225 | const struct file_entry fe = lh->file_names [file_index]; |
7226 | char *include_name = fe.name; | |
7227 | char *dir_name = NULL; | |
7228 | char *pst_filename = pst->filename; | |
7229 | ||
7230 | if (fe.dir_index) | |
7231 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
7232 | ||
7233 | if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL) | |
7234 | { | |
1754f103 MK |
7235 | include_name = concat (dir_name, SLASH_STRING, |
7236 | include_name, (char *)NULL); | |
5b5464ad JB |
7237 | make_cleanup (xfree, include_name); |
7238 | } | |
7239 | ||
7240 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
7241 | { | |
1754f103 MK |
7242 | pst_filename = concat (pst->dirname, SLASH_STRING, |
7243 | pst_filename, (char *)NULL); | |
5b5464ad JB |
7244 | make_cleanup (xfree, pst_filename); |
7245 | } | |
7246 | ||
7247 | if (strcmp (include_name, pst_filename) != 0) | |
aaa75496 JB |
7248 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
7249 | } | |
7250 | } | |
cb1df416 DJ |
7251 | else |
7252 | { | |
7253 | /* Make sure a symtab is created for every file, even files | |
7254 | which contain only variables (i.e. no code with associated | |
7255 | line numbers). */ | |
7256 | ||
7257 | int i; | |
7258 | struct file_entry *fe; | |
7259 | ||
7260 | for (i = 0; i < lh->num_file_names; i++) | |
7261 | { | |
7262 | char *dir = NULL; | |
7263 | fe = &lh->file_names[i]; | |
7264 | if (fe->dir_index) | |
7265 | dir = lh->include_dirs[fe->dir_index - 1]; | |
7266 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
7267 | ||
7268 | /* Skip the main file; we don't need it, and it must be | |
7269 | allocated last, so that it will show up before the | |
7270 | non-primary symtabs in the objfile's symtab list. */ | |
7271 | if (current_subfile == first_subfile) | |
7272 | continue; | |
7273 | ||
7274 | if (current_subfile->symtab == NULL) | |
7275 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
7276 | cu->objfile); | |
7277 | fe->symtab = current_subfile->symtab; | |
7278 | } | |
7279 | } | |
c906108c SS |
7280 | } |
7281 | ||
7282 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
7283 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
7284 | or NULL if not known. COMP_DIR is the compilation directory for the |
7285 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
7286 | This routine tries to keep line numbers from identical absolute and |
7287 | relative file names in a common subfile. | |
7288 | ||
7289 | Using the `list' example from the GDB testsuite, which resides in | |
7290 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
7291 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
7292 | ||
c5aa993b JM |
7293 | DW_AT_name: /srcdir/list0.c |
7294 | DW_AT_comp_dir: /compdir | |
357e46e7 | 7295 | files.files[0].name: list0.h |
c5aa993b | 7296 | files.files[0].dir: /srcdir |
357e46e7 | 7297 | files.files[1].name: list0.c |
c5aa993b | 7298 | files.files[1].dir: /srcdir |
c906108c SS |
7299 | |
7300 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
7301 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
7302 | start_subfile will ensure that this happens provided that we pass the | |
7303 | concatenation of files.files[1].dir and files.files[1].name as the | |
7304 | subfile's name. */ | |
c906108c SS |
7305 | |
7306 | static void | |
4f1520fb | 7307 | dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir) |
c906108c | 7308 | { |
4f1520fb FR |
7309 | char *fullname; |
7310 | ||
7311 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
7312 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
7313 | second argument to start_subfile. To be consistent, we do the | |
7314 | same here. In order not to lose the line information directory, | |
7315 | we concatenate it to the filename when it makes sense. | |
7316 | Note that the Dwarf3 standard says (speaking of filenames in line | |
7317 | information): ``The directory index is ignored for file names | |
7318 | that represent full path names''. Thus ignoring dirname in the | |
7319 | `else' branch below isn't an issue. */ | |
c906108c | 7320 | |
d5166ae1 | 7321 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
4f1520fb FR |
7322 | fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL); |
7323 | else | |
7324 | fullname = filename; | |
c906108c | 7325 | |
4f1520fb FR |
7326 | start_subfile (fullname, comp_dir); |
7327 | ||
7328 | if (fullname != filename) | |
7329 | xfree (fullname); | |
c906108c SS |
7330 | } |
7331 | ||
4c2df51b DJ |
7332 | static void |
7333 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 7334 | struct dwarf2_cu *cu) |
4c2df51b | 7335 | { |
e7c27a73 DJ |
7336 | struct objfile *objfile = cu->objfile; |
7337 | struct comp_unit_head *cu_header = &cu->header; | |
7338 | ||
4c2df51b DJ |
7339 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
7340 | code here to turn a symbol with DW_AT_external and a | |
7341 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
7342 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
7343 | with some versions of binutils) where shared libraries could have | |
7344 | relocations against symbols in their debug information - the | |
7345 | minimal symbol would have the right address, but the debug info | |
7346 | would not. It's no longer necessary, because we will explicitly | |
7347 | apply relocations when we read in the debug information now. */ | |
7348 | ||
7349 | /* A DW_AT_location attribute with no contents indicates that a | |
7350 | variable has been optimized away. */ | |
7351 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
7352 | { | |
7353 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
7354 | return; | |
7355 | } | |
7356 | ||
7357 | /* Handle one degenerate form of location expression specially, to | |
7358 | preserve GDB's previous behavior when section offsets are | |
7359 | specified. If this is just a DW_OP_addr then mark this symbol | |
7360 | as LOC_STATIC. */ | |
7361 | ||
7362 | if (attr_form_is_block (attr) | |
7363 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size | |
7364 | && DW_BLOCK (attr)->data[0] == DW_OP_addr) | |
7365 | { | |
891d2f0b | 7366 | unsigned int dummy; |
4c2df51b DJ |
7367 | |
7368 | SYMBOL_VALUE_ADDRESS (sym) = | |
e7c27a73 | 7369 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); |
907fc202 | 7370 | SYMBOL_CLASS (sym) = LOC_STATIC; |
4c2df51b DJ |
7371 | fixup_symbol_section (sym, objfile); |
7372 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
7373 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
7374 | return; |
7375 | } | |
7376 | ||
7377 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
7378 | expression evaluator, and use LOC_COMPUTED only when necessary | |
7379 | (i.e. when the value of a register or memory location is | |
7380 | referenced, or a thread-local block, etc.). Then again, it might | |
7381 | not be worthwhile. I'm assuming that it isn't unless performance | |
7382 | or memory numbers show me otherwise. */ | |
7383 | ||
e7c27a73 | 7384 | dwarf2_symbol_mark_computed (attr, sym, cu); |
4c2df51b DJ |
7385 | SYMBOL_CLASS (sym) = LOC_COMPUTED; |
7386 | } | |
7387 | ||
c906108c SS |
7388 | /* Given a pointer to a DWARF information entry, figure out if we need |
7389 | to make a symbol table entry for it, and if so, create a new entry | |
7390 | and return a pointer to it. | |
7391 | If TYPE is NULL, determine symbol type from the die, otherwise | |
2df3850c | 7392 | used the passed type. */ |
c906108c SS |
7393 | |
7394 | static struct symbol * | |
e7c27a73 | 7395 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
c906108c | 7396 | { |
e7c27a73 | 7397 | struct objfile *objfile = cu->objfile; |
5e2b427d | 7398 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
7399 | struct symbol *sym = NULL; |
7400 | char *name; | |
7401 | struct attribute *attr = NULL; | |
7402 | struct attribute *attr2 = NULL; | |
e142c38c DJ |
7403 | CORE_ADDR baseaddr; |
7404 | ||
7405 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7406 | |
5c4e30ca | 7407 | if (die->tag != DW_TAG_namespace) |
e142c38c | 7408 | name = dwarf2_linkage_name (die, cu); |
5c4e30ca DC |
7409 | else |
7410 | name = TYPE_NAME (type); | |
7411 | ||
c906108c SS |
7412 | if (name) |
7413 | { | |
4a146b47 | 7414 | sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
7415 | sizeof (struct symbol)); |
7416 | OBJSTAT (objfile, n_syms++); | |
7417 | memset (sym, 0, sizeof (struct symbol)); | |
2de7ced7 DJ |
7418 | |
7419 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
e142c38c | 7420 | SYMBOL_LANGUAGE (sym) = cu->language; |
2de7ced7 | 7421 | SYMBOL_SET_NAMES (sym, name, strlen (name), objfile); |
c906108c SS |
7422 | |
7423 | /* Default assumptions. | |
c5aa993b | 7424 | Use the passed type or decode it from the die. */ |
176620f1 | 7425 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
875dc2fc | 7426 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
7427 | if (type != NULL) |
7428 | SYMBOL_TYPE (sym) = type; | |
7429 | else | |
e7c27a73 | 7430 | SYMBOL_TYPE (sym) = die_type (die, cu); |
e142c38c | 7431 | attr = dwarf2_attr (die, DW_AT_decl_line, cu); |
c906108c SS |
7432 | if (attr) |
7433 | { | |
7434 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
7435 | } | |
cb1df416 DJ |
7436 | |
7437 | attr = dwarf2_attr (die, DW_AT_decl_file, cu); | |
7438 | if (attr) | |
7439 | { | |
7440 | int file_index = DW_UNSND (attr); | |
7441 | if (cu->line_header == NULL | |
7442 | || file_index > cu->line_header->num_file_names) | |
7443 | complaint (&symfile_complaints, | |
7444 | _("file index out of range")); | |
1c3d648d | 7445 | else if (file_index > 0) |
cb1df416 DJ |
7446 | { |
7447 | struct file_entry *fe; | |
7448 | fe = &cu->line_header->file_names[file_index - 1]; | |
7449 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
7450 | } | |
7451 | } | |
7452 | ||
c906108c SS |
7453 | switch (die->tag) |
7454 | { | |
7455 | case DW_TAG_label: | |
e142c38c | 7456 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
7457 | if (attr) |
7458 | { | |
7459 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
7460 | } | |
7461 | SYMBOL_CLASS (sym) = LOC_LABEL; | |
7462 | break; | |
7463 | case DW_TAG_subprogram: | |
7464 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
7465 | finish_block. */ | |
7466 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
e142c38c | 7467 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
7468 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
7469 | || cu->language == language_ada) | |
c906108c | 7470 | { |
2cfa0c8d JB |
7471 | /* Subprograms marked external are stored as a global symbol. |
7472 | Ada subprograms, whether marked external or not, are always | |
7473 | stored as a global symbol, because we want to be able to | |
7474 | access them globally. For instance, we want to be able | |
7475 | to break on a nested subprogram without having to | |
7476 | specify the context. */ | |
c906108c SS |
7477 | add_symbol_to_list (sym, &global_symbols); |
7478 | } | |
7479 | else | |
7480 | { | |
e142c38c | 7481 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7482 | } |
7483 | break; | |
7484 | case DW_TAG_variable: | |
7485 | /* Compilation with minimal debug info may result in variables | |
7486 | with missing type entries. Change the misleading `void' type | |
7487 | to something sensible. */ | |
7488 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) | |
64c50499 | 7489 | SYMBOL_TYPE (sym) |
5e2b427d | 7490 | = builtin_type (gdbarch)->nodebug_data_symbol; |
64c50499 | 7491 | |
e142c38c | 7492 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
7493 | if (attr) |
7494 | { | |
e7c27a73 | 7495 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 7496 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c SS |
7497 | if (attr2 && (DW_UNSND (attr2) != 0)) |
7498 | add_symbol_to_list (sym, &global_symbols); | |
7499 | else | |
e142c38c | 7500 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7501 | break; |
7502 | } | |
e142c38c | 7503 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
7504 | if (attr) |
7505 | { | |
e7c27a73 | 7506 | var_decode_location (attr, sym, cu); |
e142c38c | 7507 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c | 7508 | if (attr2 && (DW_UNSND (attr2) != 0)) |
4c2df51b | 7509 | add_symbol_to_list (sym, &global_symbols); |
c906108c | 7510 | else |
e142c38c | 7511 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7512 | } |
7513 | else | |
7514 | { | |
7515 | /* We do not know the address of this symbol. | |
c5aa993b JM |
7516 | If it is an external symbol and we have type information |
7517 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
7518 | The address of the variable will then be determined from | |
7519 | the minimal symbol table whenever the variable is | |
7520 | referenced. */ | |
e142c38c | 7521 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c906108c | 7522 | if (attr2 && (DW_UNSND (attr2) != 0) |
e142c38c | 7523 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
c906108c SS |
7524 | { |
7525 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; | |
7526 | add_symbol_to_list (sym, &global_symbols); | |
7527 | } | |
7528 | } | |
7529 | break; | |
7530 | case DW_TAG_formal_parameter: | |
2a2d4dc3 | 7531 | SYMBOL_IS_ARGUMENT (sym) = 1; |
e142c38c | 7532 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
7533 | if (attr) |
7534 | { | |
e7c27a73 | 7535 | var_decode_location (attr, sym, cu); |
c906108c | 7536 | } |
e142c38c | 7537 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
7538 | if (attr) |
7539 | { | |
e7c27a73 | 7540 | dwarf2_const_value (attr, sym, cu); |
c906108c | 7541 | } |
e142c38c | 7542 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7543 | break; |
7544 | case DW_TAG_unspecified_parameters: | |
7545 | /* From varargs functions; gdb doesn't seem to have any | |
7546 | interest in this information, so just ignore it for now. | |
7547 | (FIXME?) */ | |
7548 | break; | |
7549 | case DW_TAG_class_type: | |
680b30c7 | 7550 | case DW_TAG_interface_type: |
c906108c SS |
7551 | case DW_TAG_structure_type: |
7552 | case DW_TAG_union_type: | |
72019c9c | 7553 | case DW_TAG_set_type: |
c906108c SS |
7554 | case DW_TAG_enumeration_type: |
7555 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 7556 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 7557 | |
63d06c5c DC |
7558 | /* Make sure that the symbol includes appropriate enclosing |
7559 | classes/namespaces in its name. These are calculated in | |
134d01f1 | 7560 | read_structure_type, and the correct name is saved in |
63d06c5c DC |
7561 | the type. */ |
7562 | ||
987504bb JJ |
7563 | if (cu->language == language_cplus |
7564 | || cu->language == language_java) | |
c906108c | 7565 | { |
63d06c5c DC |
7566 | struct type *type = SYMBOL_TYPE (sym); |
7567 | ||
7568 | if (TYPE_TAG_NAME (type) != NULL) | |
7569 | { | |
7570 | /* FIXME: carlton/2003-11-10: Should this use | |
7571 | SYMBOL_SET_NAMES instead? (The same problem also | |
d8151005 DJ |
7572 | arises further down in this function.) */ |
7573 | /* The type's name is already allocated along with | |
7574 | this objfile, so we don't need to duplicate it | |
7575 | for the symbol. */ | |
7576 | SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type); | |
63d06c5c | 7577 | } |
c906108c | 7578 | } |
63d06c5c DC |
7579 | |
7580 | { | |
987504bb | 7581 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
7582 | really ever be static objects: otherwise, if you try |
7583 | to, say, break of a class's method and you're in a file | |
7584 | which doesn't mention that class, it won't work unless | |
7585 | the check for all static symbols in lookup_symbol_aux | |
7586 | saves you. See the OtherFileClass tests in | |
7587 | gdb.c++/namespace.exp. */ | |
7588 | ||
7589 | struct pending **list_to_add; | |
7590 | ||
e142c38c | 7591 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
7592 | && (cu->language == language_cplus |
7593 | || cu->language == language_java) | |
e142c38c | 7594 | ? &global_symbols : cu->list_in_scope); |
63d06c5c DC |
7595 | |
7596 | add_symbol_to_list (sym, list_to_add); | |
7597 | ||
7598 | /* The semantics of C++ state that "struct foo { ... }" also | |
987504bb | 7599 | defines a typedef for "foo". A Java class declaration also |
5eeb2539 | 7600 | defines a typedef for the class. */ |
987504bb | 7601 | if (cu->language == language_cplus |
8c6860bb JB |
7602 | || cu->language == language_java |
7603 | || cu->language == language_ada) | |
63d06c5c | 7604 | { |
d8151005 DJ |
7605 | /* The symbol's name is already allocated along with |
7606 | this objfile, so we don't need to duplicate it for | |
7607 | the type. */ | |
63d06c5c | 7608 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
77ef991d | 7609 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); |
63d06c5c DC |
7610 | } |
7611 | } | |
c906108c SS |
7612 | break; |
7613 | case DW_TAG_typedef: | |
0114d602 | 7614 | SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu); |
63d06c5c DC |
7615 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
7616 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; | |
e142c38c | 7617 | add_symbol_to_list (sym, cu->list_in_scope); |
63d06c5c | 7618 | break; |
c906108c | 7619 | case DW_TAG_base_type: |
a02abb62 | 7620 | case DW_TAG_subrange_type: |
c906108c | 7621 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
176620f1 | 7622 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e142c38c | 7623 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
7624 | break; |
7625 | case DW_TAG_enumerator: | |
0114d602 | 7626 | SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu); |
e142c38c | 7627 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
7628 | if (attr) |
7629 | { | |
e7c27a73 | 7630 | dwarf2_const_value (attr, sym, cu); |
c906108c | 7631 | } |
63d06c5c DC |
7632 | { |
7633 | /* NOTE: carlton/2003-11-10: See comment above in the | |
7634 | DW_TAG_class_type, etc. block. */ | |
7635 | ||
7636 | struct pending **list_to_add; | |
7637 | ||
e142c38c | 7638 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
7639 | && (cu->language == language_cplus |
7640 | || cu->language == language_java) | |
e142c38c | 7641 | ? &global_symbols : cu->list_in_scope); |
63d06c5c DC |
7642 | |
7643 | add_symbol_to_list (sym, list_to_add); | |
7644 | } | |
c906108c | 7645 | break; |
5c4e30ca DC |
7646 | case DW_TAG_namespace: |
7647 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
7648 | add_symbol_to_list (sym, &global_symbols); | |
7649 | break; | |
c906108c SS |
7650 | default: |
7651 | /* Not a tag we recognize. Hopefully we aren't processing | |
7652 | trash data, but since we must specifically ignore things | |
7653 | we don't recognize, there is nothing else we should do at | |
7654 | this point. */ | |
e2e0b3e5 | 7655 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 7656 | dwarf_tag_name (die->tag)); |
c906108c SS |
7657 | break; |
7658 | } | |
df8a16a1 DJ |
7659 | |
7660 | /* For the benefit of old versions of GCC, check for anonymous | |
7661 | namespaces based on the demangled name. */ | |
7662 | if (!processing_has_namespace_info | |
7663 | && cu->language == language_cplus | |
7664 | && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL) | |
7665 | cp_scan_for_anonymous_namespaces (sym); | |
c906108c SS |
7666 | } |
7667 | return (sym); | |
7668 | } | |
7669 | ||
7670 | /* Copy constant value from an attribute to a symbol. */ | |
7671 | ||
7672 | static void | |
107d2387 | 7673 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
e7c27a73 | 7674 | struct dwarf2_cu *cu) |
c906108c | 7675 | { |
e7c27a73 DJ |
7676 | struct objfile *objfile = cu->objfile; |
7677 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c SS |
7678 | struct dwarf_block *blk; |
7679 | ||
7680 | switch (attr->form) | |
7681 | { | |
7682 | case DW_FORM_addr: | |
107d2387 | 7683 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) |
3567439c | 7684 | dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym), |
4d3c2250 KB |
7685 | cu_header->addr_size, |
7686 | TYPE_LENGTH (SYMBOL_TYPE | |
7687 | (sym))); | |
4e38b386 | 7688 | SYMBOL_VALUE_BYTES (sym) = |
4a146b47 | 7689 | obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size); |
fbd9dcd3 AC |
7690 | /* NOTE: cagney/2003-05-09: In-lined store_address call with |
7691 | it's body - store_unsigned_integer. */ | |
7692 | store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, | |
7693 | DW_ADDR (attr)); | |
c906108c SS |
7694 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
7695 | break; | |
93b5768b PA |
7696 | case DW_FORM_strp: |
7697 | /* DW_STRING is already allocated on the obstack, point directly | |
7698 | to it. */ | |
7699 | SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr); | |
7700 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
7701 | break; | |
c906108c SS |
7702 | case DW_FORM_block1: |
7703 | case DW_FORM_block2: | |
7704 | case DW_FORM_block4: | |
7705 | case DW_FORM_block: | |
7706 | blk = DW_BLOCK (attr); | |
7707 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) | |
3567439c | 7708 | dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym), |
4d3c2250 KB |
7709 | blk->size, |
7710 | TYPE_LENGTH (SYMBOL_TYPE | |
7711 | (sym))); | |
4e38b386 | 7712 | SYMBOL_VALUE_BYTES (sym) = |
4a146b47 | 7713 | obstack_alloc (&objfile->objfile_obstack, blk->size); |
c906108c SS |
7714 | memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); |
7715 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
7716 | break; | |
2df3850c JM |
7717 | |
7718 | /* The DW_AT_const_value attributes are supposed to carry the | |
7719 | symbol's value "represented as it would be on the target | |
7720 | architecture." By the time we get here, it's already been | |
7721 | converted to host endianness, so we just need to sign- or | |
7722 | zero-extend it as appropriate. */ | |
7723 | case DW_FORM_data1: | |
7724 | dwarf2_const_value_data (attr, sym, 8); | |
7725 | break; | |
c906108c | 7726 | case DW_FORM_data2: |
2df3850c JM |
7727 | dwarf2_const_value_data (attr, sym, 16); |
7728 | break; | |
c906108c | 7729 | case DW_FORM_data4: |
2df3850c JM |
7730 | dwarf2_const_value_data (attr, sym, 32); |
7731 | break; | |
c906108c | 7732 | case DW_FORM_data8: |
2df3850c JM |
7733 | dwarf2_const_value_data (attr, sym, 64); |
7734 | break; | |
7735 | ||
c906108c | 7736 | case DW_FORM_sdata: |
2df3850c JM |
7737 | SYMBOL_VALUE (sym) = DW_SND (attr); |
7738 | SYMBOL_CLASS (sym) = LOC_CONST; | |
7739 | break; | |
7740 | ||
c906108c SS |
7741 | case DW_FORM_udata: |
7742 | SYMBOL_VALUE (sym) = DW_UNSND (attr); | |
7743 | SYMBOL_CLASS (sym) = LOC_CONST; | |
7744 | break; | |
2df3850c | 7745 | |
c906108c | 7746 | default: |
4d3c2250 | 7747 | complaint (&symfile_complaints, |
e2e0b3e5 | 7748 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 7749 | dwarf_form_name (attr->form)); |
c906108c SS |
7750 | SYMBOL_VALUE (sym) = 0; |
7751 | SYMBOL_CLASS (sym) = LOC_CONST; | |
7752 | break; | |
7753 | } | |
7754 | } | |
7755 | ||
2df3850c JM |
7756 | |
7757 | /* Given an attr with a DW_FORM_dataN value in host byte order, sign- | |
7758 | or zero-extend it as appropriate for the symbol's type. */ | |
7759 | static void | |
7760 | dwarf2_const_value_data (struct attribute *attr, | |
7761 | struct symbol *sym, | |
7762 | int bits) | |
7763 | { | |
7764 | LONGEST l = DW_UNSND (attr); | |
7765 | ||
7766 | if (bits < sizeof (l) * 8) | |
7767 | { | |
7768 | if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) | |
7769 | l &= ((LONGEST) 1 << bits) - 1; | |
7770 | else | |
bf9198f1 | 7771 | l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); |
2df3850c JM |
7772 | } |
7773 | ||
7774 | SYMBOL_VALUE (sym) = l; | |
7775 | SYMBOL_CLASS (sym) = LOC_CONST; | |
7776 | } | |
7777 | ||
7778 | ||
c906108c SS |
7779 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
7780 | ||
7781 | static struct type * | |
e7c27a73 | 7782 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 7783 | { |
5e2b427d | 7784 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
c906108c SS |
7785 | struct type *type; |
7786 | struct attribute *type_attr; | |
7787 | struct die_info *type_die; | |
c906108c | 7788 | |
e142c38c | 7789 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
7790 | if (!type_attr) |
7791 | { | |
7792 | /* A missing DW_AT_type represents a void type. */ | |
5e2b427d | 7793 | return builtin_type (gdbarch)->builtin_void; |
c906108c SS |
7794 | } |
7795 | else | |
f2f0e013 | 7796 | type_die = follow_die_ref (die, type_attr, &cu); |
10b3939b | 7797 | |
e7c27a73 | 7798 | type = tag_type_to_type (type_die, cu); |
c906108c SS |
7799 | if (!type) |
7800 | { | |
7801 | dump_die (type_die); | |
8a3fe4f8 | 7802 | error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"), |
e7c27a73 | 7803 | cu->objfile->name); |
c906108c SS |
7804 | } |
7805 | return type; | |
7806 | } | |
7807 | ||
7808 | /* Return the containing type of the die in question using its | |
7809 | DW_AT_containing_type attribute. */ | |
7810 | ||
7811 | static struct type * | |
e7c27a73 | 7812 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7813 | { |
7814 | struct type *type = NULL; | |
7815 | struct attribute *type_attr; | |
7816 | struct die_info *type_die = NULL; | |
c906108c | 7817 | |
e142c38c | 7818 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
c906108c SS |
7819 | if (type_attr) |
7820 | { | |
f2f0e013 | 7821 | type_die = follow_die_ref (die, type_attr, &cu); |
e7c27a73 | 7822 | type = tag_type_to_type (type_die, cu); |
c906108c SS |
7823 | } |
7824 | if (!type) | |
7825 | { | |
7826 | if (type_die) | |
7827 | dump_die (type_die); | |
8a3fe4f8 | 7828 | error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"), |
e7c27a73 | 7829 | cu->objfile->name); |
c906108c SS |
7830 | } |
7831 | return type; | |
7832 | } | |
7833 | ||
c906108c | 7834 | static struct type * |
e7c27a73 | 7835 | tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 7836 | { |
f792889a DJ |
7837 | struct type *this_type; |
7838 | ||
7839 | this_type = read_type_die (die, cu); | |
7840 | if (!this_type) | |
c906108c | 7841 | { |
f792889a DJ |
7842 | dump_die (die); |
7843 | error (_("Dwarf Error: Cannot find type of die [in module %s]"), | |
7844 | cu->objfile->name); | |
c906108c | 7845 | } |
f792889a | 7846 | return this_type; |
c906108c SS |
7847 | } |
7848 | ||
f792889a | 7849 | static struct type * |
e7c27a73 | 7850 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 7851 | { |
f792889a DJ |
7852 | struct type *this_type; |
7853 | ||
7854 | this_type = get_die_type (die, cu); | |
7855 | if (this_type) | |
7856 | return this_type; | |
7857 | ||
c906108c SS |
7858 | switch (die->tag) |
7859 | { | |
7860 | case DW_TAG_class_type: | |
680b30c7 | 7861 | case DW_TAG_interface_type: |
c906108c SS |
7862 | case DW_TAG_structure_type: |
7863 | case DW_TAG_union_type: | |
f792889a | 7864 | this_type = read_structure_type (die, cu); |
c906108c SS |
7865 | break; |
7866 | case DW_TAG_enumeration_type: | |
f792889a | 7867 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
7868 | break; |
7869 | case DW_TAG_subprogram: | |
7870 | case DW_TAG_subroutine_type: | |
f792889a | 7871 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
7872 | break; |
7873 | case DW_TAG_array_type: | |
f792889a | 7874 | this_type = read_array_type (die, cu); |
c906108c | 7875 | break; |
72019c9c | 7876 | case DW_TAG_set_type: |
f792889a | 7877 | this_type = read_set_type (die, cu); |
72019c9c | 7878 | break; |
c906108c | 7879 | case DW_TAG_pointer_type: |
f792889a | 7880 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
7881 | break; |
7882 | case DW_TAG_ptr_to_member_type: | |
f792889a | 7883 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
7884 | break; |
7885 | case DW_TAG_reference_type: | |
f792889a | 7886 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
7887 | break; |
7888 | case DW_TAG_const_type: | |
f792889a | 7889 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
7890 | break; |
7891 | case DW_TAG_volatile_type: | |
f792889a | 7892 | this_type = read_tag_volatile_type (die, cu); |
c906108c SS |
7893 | break; |
7894 | case DW_TAG_string_type: | |
f792889a | 7895 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
7896 | break; |
7897 | case DW_TAG_typedef: | |
f792889a | 7898 | this_type = read_typedef (die, cu); |
c906108c | 7899 | break; |
a02abb62 | 7900 | case DW_TAG_subrange_type: |
f792889a | 7901 | this_type = read_subrange_type (die, cu); |
a02abb62 | 7902 | break; |
c906108c | 7903 | case DW_TAG_base_type: |
f792889a | 7904 | this_type = read_base_type (die, cu); |
c906108c | 7905 | break; |
81a17f79 | 7906 | case DW_TAG_unspecified_type: |
f792889a | 7907 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 7908 | break; |
0114d602 DJ |
7909 | case DW_TAG_namespace: |
7910 | this_type = read_namespace_type (die, cu); | |
7911 | break; | |
c906108c | 7912 | default: |
a1f5b845 | 7913 | complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 7914 | dwarf_tag_name (die->tag)); |
c906108c SS |
7915 | break; |
7916 | } | |
63d06c5c | 7917 | |
f792889a | 7918 | return this_type; |
63d06c5c DC |
7919 | } |
7920 | ||
fdde2d81 | 7921 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 7922 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 7923 | |
0114d602 DJ |
7924 | For example, if we're within the method foo() in the following |
7925 | code: | |
7926 | ||
7927 | namespace N { | |
7928 | class C { | |
7929 | void foo () { | |
7930 | } | |
7931 | }; | |
7932 | } | |
7933 | ||
7934 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 DC |
7935 | |
7936 | static char * | |
e142c38c | 7937 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 7938 | { |
0114d602 DJ |
7939 | struct die_info *parent, *spec_die; |
7940 | struct dwarf2_cu *spec_cu; | |
7941 | struct type *parent_type; | |
63d06c5c | 7942 | |
987504bb JJ |
7943 | if (cu->language != language_cplus |
7944 | && cu->language != language_java) | |
0114d602 DJ |
7945 | return ""; |
7946 | ||
7947 | /* We have to be careful in the presence of DW_AT_specification. | |
7948 | For example, with GCC 3.4, given the code | |
7949 | ||
7950 | namespace N { | |
7951 | void foo() { | |
7952 | // Definition of N::foo. | |
7953 | } | |
7954 | } | |
7955 | ||
7956 | then we'll have a tree of DIEs like this: | |
7957 | ||
7958 | 1: DW_TAG_compile_unit | |
7959 | 2: DW_TAG_namespace // N | |
7960 | 3: DW_TAG_subprogram // declaration of N::foo | |
7961 | 4: DW_TAG_subprogram // definition of N::foo | |
7962 | DW_AT_specification // refers to die #3 | |
7963 | ||
7964 | Thus, when processing die #4, we have to pretend that we're in | |
7965 | the context of its DW_AT_specification, namely the contex of die | |
7966 | #3. */ | |
7967 | spec_cu = cu; | |
7968 | spec_die = die_specification (die, &spec_cu); | |
7969 | if (spec_die == NULL) | |
7970 | parent = die->parent; | |
7971 | else | |
63d06c5c | 7972 | { |
0114d602 DJ |
7973 | parent = spec_die->parent; |
7974 | cu = spec_cu; | |
63d06c5c | 7975 | } |
0114d602 DJ |
7976 | |
7977 | if (parent == NULL) | |
7978 | return ""; | |
63d06c5c | 7979 | else |
0114d602 DJ |
7980 | switch (parent->tag) |
7981 | { | |
63d06c5c | 7982 | case DW_TAG_namespace: |
0114d602 DJ |
7983 | parent_type = read_type_die (parent, cu); |
7984 | /* We give a name to even anonymous namespaces. */ | |
7985 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 7986 | case DW_TAG_class_type: |
680b30c7 | 7987 | case DW_TAG_interface_type: |
63d06c5c | 7988 | case DW_TAG_structure_type: |
0114d602 DJ |
7989 | case DW_TAG_union_type: |
7990 | parent_type = read_type_die (parent, cu); | |
7991 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
7992 | return TYPE_TAG_NAME (parent_type); | |
7993 | else | |
7994 | /* An anonymous structure is only allowed non-static data | |
7995 | members; no typedefs, no member functions, et cetera. | |
7996 | So it does not need a prefix. */ | |
7997 | return ""; | |
63d06c5c | 7998 | default: |
8176b9b8 | 7999 | return determine_prefix (parent, cu); |
63d06c5c | 8000 | } |
63d06c5c DC |
8001 | } |
8002 | ||
987504bb JJ |
8003 | /* Return a newly-allocated string formed by concatenating PREFIX and |
8004 | SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
8005 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, | |
8006 | perform an obconcat, otherwise allocate storage for the result. The CU argument | |
8007 | is used to determine the language and hence, the appropriate separator. */ | |
8008 | ||
8009 | #define MAX_SEP_LEN 2 /* sizeof ("::") */ | |
63d06c5c DC |
8010 | |
8011 | static char * | |
987504bb JJ |
8012 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
8013 | struct dwarf2_cu *cu) | |
63d06c5c | 8014 | { |
987504bb | 8015 | char *sep; |
63d06c5c | 8016 | |
987504bb JJ |
8017 | if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0') |
8018 | sep = ""; | |
8019 | else if (cu->language == language_java) | |
8020 | sep = "."; | |
8021 | else | |
8022 | sep = "::"; | |
63d06c5c | 8023 | |
987504bb JJ |
8024 | if (obs == NULL) |
8025 | { | |
8026 | char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
8027 | retval[0] = '\0'; | |
8028 | ||
8029 | if (prefix) | |
8030 | { | |
8031 | strcpy (retval, prefix); | |
8032 | strcat (retval, sep); | |
8033 | } | |
8034 | if (suffix) | |
8035 | strcat (retval, suffix); | |
8036 | ||
63d06c5c DC |
8037 | return retval; |
8038 | } | |
987504bb JJ |
8039 | else |
8040 | { | |
8041 | /* We have an obstack. */ | |
8042 | return obconcat (obs, prefix, sep, suffix); | |
8043 | } | |
63d06c5c DC |
8044 | } |
8045 | ||
c906108c SS |
8046 | /* Return sibling of die, NULL if no sibling. */ |
8047 | ||
f9aca02d | 8048 | static struct die_info * |
fba45db2 | 8049 | sibling_die (struct die_info *die) |
c906108c | 8050 | { |
639d11d3 | 8051 | return die->sibling; |
c906108c SS |
8052 | } |
8053 | ||
8054 | /* Get linkage name of a die, return NULL if not found. */ | |
8055 | ||
8056 | static char * | |
e142c38c | 8057 | dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
8058 | { |
8059 | struct attribute *attr; | |
8060 | ||
e142c38c | 8061 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); |
c906108c SS |
8062 | if (attr && DW_STRING (attr)) |
8063 | return DW_STRING (attr); | |
e142c38c | 8064 | attr = dwarf2_attr (die, DW_AT_name, cu); |
c906108c SS |
8065 | if (attr && DW_STRING (attr)) |
8066 | return DW_STRING (attr); | |
8067 | return NULL; | |
8068 | } | |
8069 | ||
9219021c DC |
8070 | /* Get name of a die, return NULL if not found. */ |
8071 | ||
8072 | static char * | |
e142c38c | 8073 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
8074 | { |
8075 | struct attribute *attr; | |
8076 | ||
e142c38c | 8077 | attr = dwarf2_attr (die, DW_AT_name, cu); |
9219021c DC |
8078 | if (attr && DW_STRING (attr)) |
8079 | return DW_STRING (attr); | |
8080 | return NULL; | |
8081 | } | |
8082 | ||
8083 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
8084 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
8085 | containing the return value on output. */ | |
9219021c DC |
8086 | |
8087 | static struct die_info * | |
f2f0e013 | 8088 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
8089 | { |
8090 | struct attribute *attr; | |
9219021c | 8091 | |
f2f0e013 | 8092 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
8093 | if (attr == NULL) |
8094 | return NULL; | |
8095 | ||
f2f0e013 | 8096 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
8097 | } |
8098 | ||
c906108c SS |
8099 | /* Convert a DIE tag into its string name. */ |
8100 | ||
8101 | static char * | |
aa1ee363 | 8102 | dwarf_tag_name (unsigned tag) |
c906108c SS |
8103 | { |
8104 | switch (tag) | |
8105 | { | |
8106 | case DW_TAG_padding: | |
8107 | return "DW_TAG_padding"; | |
8108 | case DW_TAG_array_type: | |
8109 | return "DW_TAG_array_type"; | |
8110 | case DW_TAG_class_type: | |
8111 | return "DW_TAG_class_type"; | |
8112 | case DW_TAG_entry_point: | |
8113 | return "DW_TAG_entry_point"; | |
8114 | case DW_TAG_enumeration_type: | |
8115 | return "DW_TAG_enumeration_type"; | |
8116 | case DW_TAG_formal_parameter: | |
8117 | return "DW_TAG_formal_parameter"; | |
8118 | case DW_TAG_imported_declaration: | |
8119 | return "DW_TAG_imported_declaration"; | |
8120 | case DW_TAG_label: | |
8121 | return "DW_TAG_label"; | |
8122 | case DW_TAG_lexical_block: | |
8123 | return "DW_TAG_lexical_block"; | |
8124 | case DW_TAG_member: | |
8125 | return "DW_TAG_member"; | |
8126 | case DW_TAG_pointer_type: | |
8127 | return "DW_TAG_pointer_type"; | |
8128 | case DW_TAG_reference_type: | |
8129 | return "DW_TAG_reference_type"; | |
8130 | case DW_TAG_compile_unit: | |
8131 | return "DW_TAG_compile_unit"; | |
8132 | case DW_TAG_string_type: | |
8133 | return "DW_TAG_string_type"; | |
8134 | case DW_TAG_structure_type: | |
8135 | return "DW_TAG_structure_type"; | |
8136 | case DW_TAG_subroutine_type: | |
8137 | return "DW_TAG_subroutine_type"; | |
8138 | case DW_TAG_typedef: | |
8139 | return "DW_TAG_typedef"; | |
8140 | case DW_TAG_union_type: | |
8141 | return "DW_TAG_union_type"; | |
8142 | case DW_TAG_unspecified_parameters: | |
8143 | return "DW_TAG_unspecified_parameters"; | |
8144 | case DW_TAG_variant: | |
8145 | return "DW_TAG_variant"; | |
8146 | case DW_TAG_common_block: | |
8147 | return "DW_TAG_common_block"; | |
8148 | case DW_TAG_common_inclusion: | |
8149 | return "DW_TAG_common_inclusion"; | |
8150 | case DW_TAG_inheritance: | |
8151 | return "DW_TAG_inheritance"; | |
8152 | case DW_TAG_inlined_subroutine: | |
8153 | return "DW_TAG_inlined_subroutine"; | |
8154 | case DW_TAG_module: | |
8155 | return "DW_TAG_module"; | |
8156 | case DW_TAG_ptr_to_member_type: | |
8157 | return "DW_TAG_ptr_to_member_type"; | |
8158 | case DW_TAG_set_type: | |
8159 | return "DW_TAG_set_type"; | |
8160 | case DW_TAG_subrange_type: | |
8161 | return "DW_TAG_subrange_type"; | |
8162 | case DW_TAG_with_stmt: | |
8163 | return "DW_TAG_with_stmt"; | |
8164 | case DW_TAG_access_declaration: | |
8165 | return "DW_TAG_access_declaration"; | |
8166 | case DW_TAG_base_type: | |
8167 | return "DW_TAG_base_type"; | |
8168 | case DW_TAG_catch_block: | |
8169 | return "DW_TAG_catch_block"; | |
8170 | case DW_TAG_const_type: | |
8171 | return "DW_TAG_const_type"; | |
8172 | case DW_TAG_constant: | |
8173 | return "DW_TAG_constant"; | |
8174 | case DW_TAG_enumerator: | |
8175 | return "DW_TAG_enumerator"; | |
8176 | case DW_TAG_file_type: | |
8177 | return "DW_TAG_file_type"; | |
8178 | case DW_TAG_friend: | |
8179 | return "DW_TAG_friend"; | |
8180 | case DW_TAG_namelist: | |
8181 | return "DW_TAG_namelist"; | |
8182 | case DW_TAG_namelist_item: | |
8183 | return "DW_TAG_namelist_item"; | |
8184 | case DW_TAG_packed_type: | |
8185 | return "DW_TAG_packed_type"; | |
8186 | case DW_TAG_subprogram: | |
8187 | return "DW_TAG_subprogram"; | |
8188 | case DW_TAG_template_type_param: | |
8189 | return "DW_TAG_template_type_param"; | |
8190 | case DW_TAG_template_value_param: | |
8191 | return "DW_TAG_template_value_param"; | |
8192 | case DW_TAG_thrown_type: | |
8193 | return "DW_TAG_thrown_type"; | |
8194 | case DW_TAG_try_block: | |
8195 | return "DW_TAG_try_block"; | |
8196 | case DW_TAG_variant_part: | |
8197 | return "DW_TAG_variant_part"; | |
8198 | case DW_TAG_variable: | |
8199 | return "DW_TAG_variable"; | |
8200 | case DW_TAG_volatile_type: | |
8201 | return "DW_TAG_volatile_type"; | |
d9fa45fe DC |
8202 | case DW_TAG_dwarf_procedure: |
8203 | return "DW_TAG_dwarf_procedure"; | |
8204 | case DW_TAG_restrict_type: | |
8205 | return "DW_TAG_restrict_type"; | |
8206 | case DW_TAG_interface_type: | |
8207 | return "DW_TAG_interface_type"; | |
8208 | case DW_TAG_namespace: | |
8209 | return "DW_TAG_namespace"; | |
8210 | case DW_TAG_imported_module: | |
8211 | return "DW_TAG_imported_module"; | |
8212 | case DW_TAG_unspecified_type: | |
8213 | return "DW_TAG_unspecified_type"; | |
8214 | case DW_TAG_partial_unit: | |
8215 | return "DW_TAG_partial_unit"; | |
8216 | case DW_TAG_imported_unit: | |
8217 | return "DW_TAG_imported_unit"; | |
b7619582 GF |
8218 | case DW_TAG_condition: |
8219 | return "DW_TAG_condition"; | |
8220 | case DW_TAG_shared_type: | |
8221 | return "DW_TAG_shared_type"; | |
c906108c SS |
8222 | case DW_TAG_MIPS_loop: |
8223 | return "DW_TAG_MIPS_loop"; | |
b7619582 GF |
8224 | case DW_TAG_HP_array_descriptor: |
8225 | return "DW_TAG_HP_array_descriptor"; | |
c906108c SS |
8226 | case DW_TAG_format_label: |
8227 | return "DW_TAG_format_label"; | |
8228 | case DW_TAG_function_template: | |
8229 | return "DW_TAG_function_template"; | |
8230 | case DW_TAG_class_template: | |
8231 | return "DW_TAG_class_template"; | |
b7619582 GF |
8232 | case DW_TAG_GNU_BINCL: |
8233 | return "DW_TAG_GNU_BINCL"; | |
8234 | case DW_TAG_GNU_EINCL: | |
8235 | return "DW_TAG_GNU_EINCL"; | |
8236 | case DW_TAG_upc_shared_type: | |
8237 | return "DW_TAG_upc_shared_type"; | |
8238 | case DW_TAG_upc_strict_type: | |
8239 | return "DW_TAG_upc_strict_type"; | |
8240 | case DW_TAG_upc_relaxed_type: | |
8241 | return "DW_TAG_upc_relaxed_type"; | |
8242 | case DW_TAG_PGI_kanji_type: | |
8243 | return "DW_TAG_PGI_kanji_type"; | |
8244 | case DW_TAG_PGI_interface_block: | |
8245 | return "DW_TAG_PGI_interface_block"; | |
c906108c SS |
8246 | default: |
8247 | return "DW_TAG_<unknown>"; | |
8248 | } | |
8249 | } | |
8250 | ||
8251 | /* Convert a DWARF attribute code into its string name. */ | |
8252 | ||
8253 | static char * | |
aa1ee363 | 8254 | dwarf_attr_name (unsigned attr) |
c906108c SS |
8255 | { |
8256 | switch (attr) | |
8257 | { | |
8258 | case DW_AT_sibling: | |
8259 | return "DW_AT_sibling"; | |
8260 | case DW_AT_location: | |
8261 | return "DW_AT_location"; | |
8262 | case DW_AT_name: | |
8263 | return "DW_AT_name"; | |
8264 | case DW_AT_ordering: | |
8265 | return "DW_AT_ordering"; | |
8266 | case DW_AT_subscr_data: | |
8267 | return "DW_AT_subscr_data"; | |
8268 | case DW_AT_byte_size: | |
8269 | return "DW_AT_byte_size"; | |
8270 | case DW_AT_bit_offset: | |
8271 | return "DW_AT_bit_offset"; | |
8272 | case DW_AT_bit_size: | |
8273 | return "DW_AT_bit_size"; | |
8274 | case DW_AT_element_list: | |
8275 | return "DW_AT_element_list"; | |
8276 | case DW_AT_stmt_list: | |
8277 | return "DW_AT_stmt_list"; | |
8278 | case DW_AT_low_pc: | |
8279 | return "DW_AT_low_pc"; | |
8280 | case DW_AT_high_pc: | |
8281 | return "DW_AT_high_pc"; | |
8282 | case DW_AT_language: | |
8283 | return "DW_AT_language"; | |
8284 | case DW_AT_member: | |
8285 | return "DW_AT_member"; | |
8286 | case DW_AT_discr: | |
8287 | return "DW_AT_discr"; | |
8288 | case DW_AT_discr_value: | |
8289 | return "DW_AT_discr_value"; | |
8290 | case DW_AT_visibility: | |
8291 | return "DW_AT_visibility"; | |
8292 | case DW_AT_import: | |
8293 | return "DW_AT_import"; | |
8294 | case DW_AT_string_length: | |
8295 | return "DW_AT_string_length"; | |
8296 | case DW_AT_common_reference: | |
8297 | return "DW_AT_common_reference"; | |
8298 | case DW_AT_comp_dir: | |
8299 | return "DW_AT_comp_dir"; | |
8300 | case DW_AT_const_value: | |
8301 | return "DW_AT_const_value"; | |
8302 | case DW_AT_containing_type: | |
8303 | return "DW_AT_containing_type"; | |
8304 | case DW_AT_default_value: | |
8305 | return "DW_AT_default_value"; | |
8306 | case DW_AT_inline: | |
8307 | return "DW_AT_inline"; | |
8308 | case DW_AT_is_optional: | |
8309 | return "DW_AT_is_optional"; | |
8310 | case DW_AT_lower_bound: | |
8311 | return "DW_AT_lower_bound"; | |
8312 | case DW_AT_producer: | |
8313 | return "DW_AT_producer"; | |
8314 | case DW_AT_prototyped: | |
8315 | return "DW_AT_prototyped"; | |
8316 | case DW_AT_return_addr: | |
8317 | return "DW_AT_return_addr"; | |
8318 | case DW_AT_start_scope: | |
8319 | return "DW_AT_start_scope"; | |
09fa0d7c JK |
8320 | case DW_AT_bit_stride: |
8321 | return "DW_AT_bit_stride"; | |
c906108c SS |
8322 | case DW_AT_upper_bound: |
8323 | return "DW_AT_upper_bound"; | |
8324 | case DW_AT_abstract_origin: | |
8325 | return "DW_AT_abstract_origin"; | |
8326 | case DW_AT_accessibility: | |
8327 | return "DW_AT_accessibility"; | |
8328 | case DW_AT_address_class: | |
8329 | return "DW_AT_address_class"; | |
8330 | case DW_AT_artificial: | |
8331 | return "DW_AT_artificial"; | |
8332 | case DW_AT_base_types: | |
8333 | return "DW_AT_base_types"; | |
8334 | case DW_AT_calling_convention: | |
8335 | return "DW_AT_calling_convention"; | |
8336 | case DW_AT_count: | |
8337 | return "DW_AT_count"; | |
8338 | case DW_AT_data_member_location: | |
8339 | return "DW_AT_data_member_location"; | |
8340 | case DW_AT_decl_column: | |
8341 | return "DW_AT_decl_column"; | |
8342 | case DW_AT_decl_file: | |
8343 | return "DW_AT_decl_file"; | |
8344 | case DW_AT_decl_line: | |
8345 | return "DW_AT_decl_line"; | |
8346 | case DW_AT_declaration: | |
8347 | return "DW_AT_declaration"; | |
8348 | case DW_AT_discr_list: | |
8349 | return "DW_AT_discr_list"; | |
8350 | case DW_AT_encoding: | |
8351 | return "DW_AT_encoding"; | |
8352 | case DW_AT_external: | |
8353 | return "DW_AT_external"; | |
8354 | case DW_AT_frame_base: | |
8355 | return "DW_AT_frame_base"; | |
8356 | case DW_AT_friend: | |
8357 | return "DW_AT_friend"; | |
8358 | case DW_AT_identifier_case: | |
8359 | return "DW_AT_identifier_case"; | |
8360 | case DW_AT_macro_info: | |
8361 | return "DW_AT_macro_info"; | |
8362 | case DW_AT_namelist_items: | |
8363 | return "DW_AT_namelist_items"; | |
8364 | case DW_AT_priority: | |
8365 | return "DW_AT_priority"; | |
8366 | case DW_AT_segment: | |
8367 | return "DW_AT_segment"; | |
8368 | case DW_AT_specification: | |
8369 | return "DW_AT_specification"; | |
8370 | case DW_AT_static_link: | |
8371 | return "DW_AT_static_link"; | |
8372 | case DW_AT_type: | |
8373 | return "DW_AT_type"; | |
8374 | case DW_AT_use_location: | |
8375 | return "DW_AT_use_location"; | |
8376 | case DW_AT_variable_parameter: | |
8377 | return "DW_AT_variable_parameter"; | |
8378 | case DW_AT_virtuality: | |
8379 | return "DW_AT_virtuality"; | |
8380 | case DW_AT_vtable_elem_location: | |
8381 | return "DW_AT_vtable_elem_location"; | |
b7619582 | 8382 | /* DWARF 3 values. */ |
d9fa45fe DC |
8383 | case DW_AT_allocated: |
8384 | return "DW_AT_allocated"; | |
8385 | case DW_AT_associated: | |
8386 | return "DW_AT_associated"; | |
8387 | case DW_AT_data_location: | |
8388 | return "DW_AT_data_location"; | |
09fa0d7c JK |
8389 | case DW_AT_byte_stride: |
8390 | return "DW_AT_byte_stride"; | |
d9fa45fe DC |
8391 | case DW_AT_entry_pc: |
8392 | return "DW_AT_entry_pc"; | |
8393 | case DW_AT_use_UTF8: | |
8394 | return "DW_AT_use_UTF8"; | |
8395 | case DW_AT_extension: | |
8396 | return "DW_AT_extension"; | |
8397 | case DW_AT_ranges: | |
8398 | return "DW_AT_ranges"; | |
8399 | case DW_AT_trampoline: | |
8400 | return "DW_AT_trampoline"; | |
8401 | case DW_AT_call_column: | |
8402 | return "DW_AT_call_column"; | |
8403 | case DW_AT_call_file: | |
8404 | return "DW_AT_call_file"; | |
8405 | case DW_AT_call_line: | |
8406 | return "DW_AT_call_line"; | |
b7619582 GF |
8407 | case DW_AT_description: |
8408 | return "DW_AT_description"; | |
8409 | case DW_AT_binary_scale: | |
8410 | return "DW_AT_binary_scale"; | |
8411 | case DW_AT_decimal_scale: | |
8412 | return "DW_AT_decimal_scale"; | |
8413 | case DW_AT_small: | |
8414 | return "DW_AT_small"; | |
8415 | case DW_AT_decimal_sign: | |
8416 | return "DW_AT_decimal_sign"; | |
8417 | case DW_AT_digit_count: | |
8418 | return "DW_AT_digit_count"; | |
8419 | case DW_AT_picture_string: | |
8420 | return "DW_AT_picture_string"; | |
8421 | case DW_AT_mutable: | |
8422 | return "DW_AT_mutable"; | |
8423 | case DW_AT_threads_scaled: | |
8424 | return "DW_AT_threads_scaled"; | |
8425 | case DW_AT_explicit: | |
8426 | return "DW_AT_explicit"; | |
8427 | case DW_AT_object_pointer: | |
8428 | return "DW_AT_object_pointer"; | |
8429 | case DW_AT_endianity: | |
8430 | return "DW_AT_endianity"; | |
8431 | case DW_AT_elemental: | |
8432 | return "DW_AT_elemental"; | |
8433 | case DW_AT_pure: | |
8434 | return "DW_AT_pure"; | |
8435 | case DW_AT_recursive: | |
8436 | return "DW_AT_recursive"; | |
c906108c | 8437 | #ifdef MIPS |
b7619582 | 8438 | /* SGI/MIPS extensions. */ |
c906108c SS |
8439 | case DW_AT_MIPS_fde: |
8440 | return "DW_AT_MIPS_fde"; | |
8441 | case DW_AT_MIPS_loop_begin: | |
8442 | return "DW_AT_MIPS_loop_begin"; | |
8443 | case DW_AT_MIPS_tail_loop_begin: | |
8444 | return "DW_AT_MIPS_tail_loop_begin"; | |
8445 | case DW_AT_MIPS_epilog_begin: | |
8446 | return "DW_AT_MIPS_epilog_begin"; | |
8447 | case DW_AT_MIPS_loop_unroll_factor: | |
8448 | return "DW_AT_MIPS_loop_unroll_factor"; | |
8449 | case DW_AT_MIPS_software_pipeline_depth: | |
8450 | return "DW_AT_MIPS_software_pipeline_depth"; | |
8451 | case DW_AT_MIPS_linkage_name: | |
8452 | return "DW_AT_MIPS_linkage_name"; | |
b7619582 GF |
8453 | case DW_AT_MIPS_stride: |
8454 | return "DW_AT_MIPS_stride"; | |
8455 | case DW_AT_MIPS_abstract_name: | |
8456 | return "DW_AT_MIPS_abstract_name"; | |
8457 | case DW_AT_MIPS_clone_origin: | |
8458 | return "DW_AT_MIPS_clone_origin"; | |
8459 | case DW_AT_MIPS_has_inlines: | |
8460 | return "DW_AT_MIPS_has_inlines"; | |
8461 | #endif | |
8462 | /* HP extensions. */ | |
8463 | case DW_AT_HP_block_index: | |
8464 | return "DW_AT_HP_block_index"; | |
8465 | case DW_AT_HP_unmodifiable: | |
8466 | return "DW_AT_HP_unmodifiable"; | |
8467 | case DW_AT_HP_actuals_stmt_list: | |
8468 | return "DW_AT_HP_actuals_stmt_list"; | |
8469 | case DW_AT_HP_proc_per_section: | |
8470 | return "DW_AT_HP_proc_per_section"; | |
8471 | case DW_AT_HP_raw_data_ptr: | |
8472 | return "DW_AT_HP_raw_data_ptr"; | |
8473 | case DW_AT_HP_pass_by_reference: | |
8474 | return "DW_AT_HP_pass_by_reference"; | |
8475 | case DW_AT_HP_opt_level: | |
8476 | return "DW_AT_HP_opt_level"; | |
8477 | case DW_AT_HP_prof_version_id: | |
8478 | return "DW_AT_HP_prof_version_id"; | |
8479 | case DW_AT_HP_opt_flags: | |
8480 | return "DW_AT_HP_opt_flags"; | |
8481 | case DW_AT_HP_cold_region_low_pc: | |
8482 | return "DW_AT_HP_cold_region_low_pc"; | |
8483 | case DW_AT_HP_cold_region_high_pc: | |
8484 | return "DW_AT_HP_cold_region_high_pc"; | |
8485 | case DW_AT_HP_all_variables_modifiable: | |
8486 | return "DW_AT_HP_all_variables_modifiable"; | |
8487 | case DW_AT_HP_linkage_name: | |
8488 | return "DW_AT_HP_linkage_name"; | |
8489 | case DW_AT_HP_prof_flags: | |
8490 | return "DW_AT_HP_prof_flags"; | |
8491 | /* GNU extensions. */ | |
c906108c SS |
8492 | case DW_AT_sf_names: |
8493 | return "DW_AT_sf_names"; | |
8494 | case DW_AT_src_info: | |
8495 | return "DW_AT_src_info"; | |
8496 | case DW_AT_mac_info: | |
8497 | return "DW_AT_mac_info"; | |
8498 | case DW_AT_src_coords: | |
8499 | return "DW_AT_src_coords"; | |
8500 | case DW_AT_body_begin: | |
8501 | return "DW_AT_body_begin"; | |
8502 | case DW_AT_body_end: | |
8503 | return "DW_AT_body_end"; | |
f5f8a009 EZ |
8504 | case DW_AT_GNU_vector: |
8505 | return "DW_AT_GNU_vector"; | |
b7619582 GF |
8506 | /* VMS extensions. */ |
8507 | case DW_AT_VMS_rtnbeg_pd_address: | |
8508 | return "DW_AT_VMS_rtnbeg_pd_address"; | |
8509 | /* UPC extension. */ | |
8510 | case DW_AT_upc_threads_scaled: | |
8511 | return "DW_AT_upc_threads_scaled"; | |
8512 | /* PGI (STMicroelectronics) extensions. */ | |
8513 | case DW_AT_PGI_lbase: | |
8514 | return "DW_AT_PGI_lbase"; | |
8515 | case DW_AT_PGI_soffset: | |
8516 | return "DW_AT_PGI_soffset"; | |
8517 | case DW_AT_PGI_lstride: | |
8518 | return "DW_AT_PGI_lstride"; | |
c906108c SS |
8519 | default: |
8520 | return "DW_AT_<unknown>"; | |
8521 | } | |
8522 | } | |
8523 | ||
8524 | /* Convert a DWARF value form code into its string name. */ | |
8525 | ||
8526 | static char * | |
aa1ee363 | 8527 | dwarf_form_name (unsigned form) |
c906108c SS |
8528 | { |
8529 | switch (form) | |
8530 | { | |
8531 | case DW_FORM_addr: | |
8532 | return "DW_FORM_addr"; | |
8533 | case DW_FORM_block2: | |
8534 | return "DW_FORM_block2"; | |
8535 | case DW_FORM_block4: | |
8536 | return "DW_FORM_block4"; | |
8537 | case DW_FORM_data2: | |
8538 | return "DW_FORM_data2"; | |
8539 | case DW_FORM_data4: | |
8540 | return "DW_FORM_data4"; | |
8541 | case DW_FORM_data8: | |
8542 | return "DW_FORM_data8"; | |
8543 | case DW_FORM_string: | |
8544 | return "DW_FORM_string"; | |
8545 | case DW_FORM_block: | |
8546 | return "DW_FORM_block"; | |
8547 | case DW_FORM_block1: | |
8548 | return "DW_FORM_block1"; | |
8549 | case DW_FORM_data1: | |
8550 | return "DW_FORM_data1"; | |
8551 | case DW_FORM_flag: | |
8552 | return "DW_FORM_flag"; | |
8553 | case DW_FORM_sdata: | |
8554 | return "DW_FORM_sdata"; | |
8555 | case DW_FORM_strp: | |
8556 | return "DW_FORM_strp"; | |
8557 | case DW_FORM_udata: | |
8558 | return "DW_FORM_udata"; | |
8559 | case DW_FORM_ref_addr: | |
8560 | return "DW_FORM_ref_addr"; | |
8561 | case DW_FORM_ref1: | |
8562 | return "DW_FORM_ref1"; | |
8563 | case DW_FORM_ref2: | |
8564 | return "DW_FORM_ref2"; | |
8565 | case DW_FORM_ref4: | |
8566 | return "DW_FORM_ref4"; | |
8567 | case DW_FORM_ref8: | |
8568 | return "DW_FORM_ref8"; | |
8569 | case DW_FORM_ref_udata: | |
8570 | return "DW_FORM_ref_udata"; | |
8571 | case DW_FORM_indirect: | |
8572 | return "DW_FORM_indirect"; | |
8573 | default: | |
8574 | return "DW_FORM_<unknown>"; | |
8575 | } | |
8576 | } | |
8577 | ||
8578 | /* Convert a DWARF stack opcode into its string name. */ | |
8579 | ||
8580 | static char * | |
aa1ee363 | 8581 | dwarf_stack_op_name (unsigned op) |
c906108c SS |
8582 | { |
8583 | switch (op) | |
8584 | { | |
8585 | case DW_OP_addr: | |
8586 | return "DW_OP_addr"; | |
8587 | case DW_OP_deref: | |
8588 | return "DW_OP_deref"; | |
8589 | case DW_OP_const1u: | |
8590 | return "DW_OP_const1u"; | |
8591 | case DW_OP_const1s: | |
8592 | return "DW_OP_const1s"; | |
8593 | case DW_OP_const2u: | |
8594 | return "DW_OP_const2u"; | |
8595 | case DW_OP_const2s: | |
8596 | return "DW_OP_const2s"; | |
8597 | case DW_OP_const4u: | |
8598 | return "DW_OP_const4u"; | |
8599 | case DW_OP_const4s: | |
8600 | return "DW_OP_const4s"; | |
8601 | case DW_OP_const8u: | |
8602 | return "DW_OP_const8u"; | |
8603 | case DW_OP_const8s: | |
8604 | return "DW_OP_const8s"; | |
8605 | case DW_OP_constu: | |
8606 | return "DW_OP_constu"; | |
8607 | case DW_OP_consts: | |
8608 | return "DW_OP_consts"; | |
8609 | case DW_OP_dup: | |
8610 | return "DW_OP_dup"; | |
8611 | case DW_OP_drop: | |
8612 | return "DW_OP_drop"; | |
8613 | case DW_OP_over: | |
8614 | return "DW_OP_over"; | |
8615 | case DW_OP_pick: | |
8616 | return "DW_OP_pick"; | |
8617 | case DW_OP_swap: | |
8618 | return "DW_OP_swap"; | |
8619 | case DW_OP_rot: | |
8620 | return "DW_OP_rot"; | |
8621 | case DW_OP_xderef: | |
8622 | return "DW_OP_xderef"; | |
8623 | case DW_OP_abs: | |
8624 | return "DW_OP_abs"; | |
8625 | case DW_OP_and: | |
8626 | return "DW_OP_and"; | |
8627 | case DW_OP_div: | |
8628 | return "DW_OP_div"; | |
8629 | case DW_OP_minus: | |
8630 | return "DW_OP_minus"; | |
8631 | case DW_OP_mod: | |
8632 | return "DW_OP_mod"; | |
8633 | case DW_OP_mul: | |
8634 | return "DW_OP_mul"; | |
8635 | case DW_OP_neg: | |
8636 | return "DW_OP_neg"; | |
8637 | case DW_OP_not: | |
8638 | return "DW_OP_not"; | |
8639 | case DW_OP_or: | |
8640 | return "DW_OP_or"; | |
8641 | case DW_OP_plus: | |
8642 | return "DW_OP_plus"; | |
8643 | case DW_OP_plus_uconst: | |
8644 | return "DW_OP_plus_uconst"; | |
8645 | case DW_OP_shl: | |
8646 | return "DW_OP_shl"; | |
8647 | case DW_OP_shr: | |
8648 | return "DW_OP_shr"; | |
8649 | case DW_OP_shra: | |
8650 | return "DW_OP_shra"; | |
8651 | case DW_OP_xor: | |
8652 | return "DW_OP_xor"; | |
8653 | case DW_OP_bra: | |
8654 | return "DW_OP_bra"; | |
8655 | case DW_OP_eq: | |
8656 | return "DW_OP_eq"; | |
8657 | case DW_OP_ge: | |
8658 | return "DW_OP_ge"; | |
8659 | case DW_OP_gt: | |
8660 | return "DW_OP_gt"; | |
8661 | case DW_OP_le: | |
8662 | return "DW_OP_le"; | |
8663 | case DW_OP_lt: | |
8664 | return "DW_OP_lt"; | |
8665 | case DW_OP_ne: | |
8666 | return "DW_OP_ne"; | |
8667 | case DW_OP_skip: | |
8668 | return "DW_OP_skip"; | |
8669 | case DW_OP_lit0: | |
8670 | return "DW_OP_lit0"; | |
8671 | case DW_OP_lit1: | |
8672 | return "DW_OP_lit1"; | |
8673 | case DW_OP_lit2: | |
8674 | return "DW_OP_lit2"; | |
8675 | case DW_OP_lit3: | |
8676 | return "DW_OP_lit3"; | |
8677 | case DW_OP_lit4: | |
8678 | return "DW_OP_lit4"; | |
8679 | case DW_OP_lit5: | |
8680 | return "DW_OP_lit5"; | |
8681 | case DW_OP_lit6: | |
8682 | return "DW_OP_lit6"; | |
8683 | case DW_OP_lit7: | |
8684 | return "DW_OP_lit7"; | |
8685 | case DW_OP_lit8: | |
8686 | return "DW_OP_lit8"; | |
8687 | case DW_OP_lit9: | |
8688 | return "DW_OP_lit9"; | |
8689 | case DW_OP_lit10: | |
8690 | return "DW_OP_lit10"; | |
8691 | case DW_OP_lit11: | |
8692 | return "DW_OP_lit11"; | |
8693 | case DW_OP_lit12: | |
8694 | return "DW_OP_lit12"; | |
8695 | case DW_OP_lit13: | |
8696 | return "DW_OP_lit13"; | |
8697 | case DW_OP_lit14: | |
8698 | return "DW_OP_lit14"; | |
8699 | case DW_OP_lit15: | |
8700 | return "DW_OP_lit15"; | |
8701 | case DW_OP_lit16: | |
8702 | return "DW_OP_lit16"; | |
8703 | case DW_OP_lit17: | |
8704 | return "DW_OP_lit17"; | |
8705 | case DW_OP_lit18: | |
8706 | return "DW_OP_lit18"; | |
8707 | case DW_OP_lit19: | |
8708 | return "DW_OP_lit19"; | |
8709 | case DW_OP_lit20: | |
8710 | return "DW_OP_lit20"; | |
8711 | case DW_OP_lit21: | |
8712 | return "DW_OP_lit21"; | |
8713 | case DW_OP_lit22: | |
8714 | return "DW_OP_lit22"; | |
8715 | case DW_OP_lit23: | |
8716 | return "DW_OP_lit23"; | |
8717 | case DW_OP_lit24: | |
8718 | return "DW_OP_lit24"; | |
8719 | case DW_OP_lit25: | |
8720 | return "DW_OP_lit25"; | |
8721 | case DW_OP_lit26: | |
8722 | return "DW_OP_lit26"; | |
8723 | case DW_OP_lit27: | |
8724 | return "DW_OP_lit27"; | |
8725 | case DW_OP_lit28: | |
8726 | return "DW_OP_lit28"; | |
8727 | case DW_OP_lit29: | |
8728 | return "DW_OP_lit29"; | |
8729 | case DW_OP_lit30: | |
8730 | return "DW_OP_lit30"; | |
8731 | case DW_OP_lit31: | |
8732 | return "DW_OP_lit31"; | |
8733 | case DW_OP_reg0: | |
8734 | return "DW_OP_reg0"; | |
8735 | case DW_OP_reg1: | |
8736 | return "DW_OP_reg1"; | |
8737 | case DW_OP_reg2: | |
8738 | return "DW_OP_reg2"; | |
8739 | case DW_OP_reg3: | |
8740 | return "DW_OP_reg3"; | |
8741 | case DW_OP_reg4: | |
8742 | return "DW_OP_reg4"; | |
8743 | case DW_OP_reg5: | |
8744 | return "DW_OP_reg5"; | |
8745 | case DW_OP_reg6: | |
8746 | return "DW_OP_reg6"; | |
8747 | case DW_OP_reg7: | |
8748 | return "DW_OP_reg7"; | |
8749 | case DW_OP_reg8: | |
8750 | return "DW_OP_reg8"; | |
8751 | case DW_OP_reg9: | |
8752 | return "DW_OP_reg9"; | |
8753 | case DW_OP_reg10: | |
8754 | return "DW_OP_reg10"; | |
8755 | case DW_OP_reg11: | |
8756 | return "DW_OP_reg11"; | |
8757 | case DW_OP_reg12: | |
8758 | return "DW_OP_reg12"; | |
8759 | case DW_OP_reg13: | |
8760 | return "DW_OP_reg13"; | |
8761 | case DW_OP_reg14: | |
8762 | return "DW_OP_reg14"; | |
8763 | case DW_OP_reg15: | |
8764 | return "DW_OP_reg15"; | |
8765 | case DW_OP_reg16: | |
8766 | return "DW_OP_reg16"; | |
8767 | case DW_OP_reg17: | |
8768 | return "DW_OP_reg17"; | |
8769 | case DW_OP_reg18: | |
8770 | return "DW_OP_reg18"; | |
8771 | case DW_OP_reg19: | |
8772 | return "DW_OP_reg19"; | |
8773 | case DW_OP_reg20: | |
8774 | return "DW_OP_reg20"; | |
8775 | case DW_OP_reg21: | |
8776 | return "DW_OP_reg21"; | |
8777 | case DW_OP_reg22: | |
8778 | return "DW_OP_reg22"; | |
8779 | case DW_OP_reg23: | |
8780 | return "DW_OP_reg23"; | |
8781 | case DW_OP_reg24: | |
8782 | return "DW_OP_reg24"; | |
8783 | case DW_OP_reg25: | |
8784 | return "DW_OP_reg25"; | |
8785 | case DW_OP_reg26: | |
8786 | return "DW_OP_reg26"; | |
8787 | case DW_OP_reg27: | |
8788 | return "DW_OP_reg27"; | |
8789 | case DW_OP_reg28: | |
8790 | return "DW_OP_reg28"; | |
8791 | case DW_OP_reg29: | |
8792 | return "DW_OP_reg29"; | |
8793 | case DW_OP_reg30: | |
8794 | return "DW_OP_reg30"; | |
8795 | case DW_OP_reg31: | |
8796 | return "DW_OP_reg31"; | |
8797 | case DW_OP_breg0: | |
8798 | return "DW_OP_breg0"; | |
8799 | case DW_OP_breg1: | |
8800 | return "DW_OP_breg1"; | |
8801 | case DW_OP_breg2: | |
8802 | return "DW_OP_breg2"; | |
8803 | case DW_OP_breg3: | |
8804 | return "DW_OP_breg3"; | |
8805 | case DW_OP_breg4: | |
8806 | return "DW_OP_breg4"; | |
8807 | case DW_OP_breg5: | |
8808 | return "DW_OP_breg5"; | |
8809 | case DW_OP_breg6: | |
8810 | return "DW_OP_breg6"; | |
8811 | case DW_OP_breg7: | |
8812 | return "DW_OP_breg7"; | |
8813 | case DW_OP_breg8: | |
8814 | return "DW_OP_breg8"; | |
8815 | case DW_OP_breg9: | |
8816 | return "DW_OP_breg9"; | |
8817 | case DW_OP_breg10: | |
8818 | return "DW_OP_breg10"; | |
8819 | case DW_OP_breg11: | |
8820 | return "DW_OP_breg11"; | |
8821 | case DW_OP_breg12: | |
8822 | return "DW_OP_breg12"; | |
8823 | case DW_OP_breg13: | |
8824 | return "DW_OP_breg13"; | |
8825 | case DW_OP_breg14: | |
8826 | return "DW_OP_breg14"; | |
8827 | case DW_OP_breg15: | |
8828 | return "DW_OP_breg15"; | |
8829 | case DW_OP_breg16: | |
8830 | return "DW_OP_breg16"; | |
8831 | case DW_OP_breg17: | |
8832 | return "DW_OP_breg17"; | |
8833 | case DW_OP_breg18: | |
8834 | return "DW_OP_breg18"; | |
8835 | case DW_OP_breg19: | |
8836 | return "DW_OP_breg19"; | |
8837 | case DW_OP_breg20: | |
8838 | return "DW_OP_breg20"; | |
8839 | case DW_OP_breg21: | |
8840 | return "DW_OP_breg21"; | |
8841 | case DW_OP_breg22: | |
8842 | return "DW_OP_breg22"; | |
8843 | case DW_OP_breg23: | |
8844 | return "DW_OP_breg23"; | |
8845 | case DW_OP_breg24: | |
8846 | return "DW_OP_breg24"; | |
8847 | case DW_OP_breg25: | |
8848 | return "DW_OP_breg25"; | |
8849 | case DW_OP_breg26: | |
8850 | return "DW_OP_breg26"; | |
8851 | case DW_OP_breg27: | |
8852 | return "DW_OP_breg27"; | |
8853 | case DW_OP_breg28: | |
8854 | return "DW_OP_breg28"; | |
8855 | case DW_OP_breg29: | |
8856 | return "DW_OP_breg29"; | |
8857 | case DW_OP_breg30: | |
8858 | return "DW_OP_breg30"; | |
8859 | case DW_OP_breg31: | |
8860 | return "DW_OP_breg31"; | |
8861 | case DW_OP_regx: | |
8862 | return "DW_OP_regx"; | |
8863 | case DW_OP_fbreg: | |
8864 | return "DW_OP_fbreg"; | |
8865 | case DW_OP_bregx: | |
8866 | return "DW_OP_bregx"; | |
8867 | case DW_OP_piece: | |
8868 | return "DW_OP_piece"; | |
8869 | case DW_OP_deref_size: | |
8870 | return "DW_OP_deref_size"; | |
8871 | case DW_OP_xderef_size: | |
8872 | return "DW_OP_xderef_size"; | |
8873 | case DW_OP_nop: | |
8874 | return "DW_OP_nop"; | |
b7619582 | 8875 | /* DWARF 3 extensions. */ |
ed348acc EZ |
8876 | case DW_OP_push_object_address: |
8877 | return "DW_OP_push_object_address"; | |
8878 | case DW_OP_call2: | |
8879 | return "DW_OP_call2"; | |
8880 | case DW_OP_call4: | |
8881 | return "DW_OP_call4"; | |
8882 | case DW_OP_call_ref: | |
8883 | return "DW_OP_call_ref"; | |
b7619582 GF |
8884 | /* GNU extensions. */ |
8885 | case DW_OP_form_tls_address: | |
8886 | return "DW_OP_form_tls_address"; | |
8887 | case DW_OP_call_frame_cfa: | |
8888 | return "DW_OP_call_frame_cfa"; | |
8889 | case DW_OP_bit_piece: | |
8890 | return "DW_OP_bit_piece"; | |
ed348acc EZ |
8891 | case DW_OP_GNU_push_tls_address: |
8892 | return "DW_OP_GNU_push_tls_address"; | |
42be36b3 CT |
8893 | case DW_OP_GNU_uninit: |
8894 | return "DW_OP_GNU_uninit"; | |
b7619582 GF |
8895 | /* HP extensions. */ |
8896 | case DW_OP_HP_is_value: | |
8897 | return "DW_OP_HP_is_value"; | |
8898 | case DW_OP_HP_fltconst4: | |
8899 | return "DW_OP_HP_fltconst4"; | |
8900 | case DW_OP_HP_fltconst8: | |
8901 | return "DW_OP_HP_fltconst8"; | |
8902 | case DW_OP_HP_mod_range: | |
8903 | return "DW_OP_HP_mod_range"; | |
8904 | case DW_OP_HP_unmod_range: | |
8905 | return "DW_OP_HP_unmod_range"; | |
8906 | case DW_OP_HP_tls: | |
8907 | return "DW_OP_HP_tls"; | |
c906108c SS |
8908 | default: |
8909 | return "OP_<unknown>"; | |
8910 | } | |
8911 | } | |
8912 | ||
8913 | static char * | |
fba45db2 | 8914 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
8915 | { |
8916 | if (mybool) | |
8917 | return "TRUE"; | |
8918 | else | |
8919 | return "FALSE"; | |
8920 | } | |
8921 | ||
8922 | /* Convert a DWARF type code into its string name. */ | |
8923 | ||
8924 | static char * | |
aa1ee363 | 8925 | dwarf_type_encoding_name (unsigned enc) |
c906108c SS |
8926 | { |
8927 | switch (enc) | |
8928 | { | |
b7619582 GF |
8929 | case DW_ATE_void: |
8930 | return "DW_ATE_void"; | |
c906108c SS |
8931 | case DW_ATE_address: |
8932 | return "DW_ATE_address"; | |
8933 | case DW_ATE_boolean: | |
8934 | return "DW_ATE_boolean"; | |
8935 | case DW_ATE_complex_float: | |
8936 | return "DW_ATE_complex_float"; | |
8937 | case DW_ATE_float: | |
8938 | return "DW_ATE_float"; | |
8939 | case DW_ATE_signed: | |
8940 | return "DW_ATE_signed"; | |
8941 | case DW_ATE_signed_char: | |
8942 | return "DW_ATE_signed_char"; | |
8943 | case DW_ATE_unsigned: | |
8944 | return "DW_ATE_unsigned"; | |
8945 | case DW_ATE_unsigned_char: | |
8946 | return "DW_ATE_unsigned_char"; | |
b7619582 | 8947 | /* DWARF 3. */ |
d9fa45fe DC |
8948 | case DW_ATE_imaginary_float: |
8949 | return "DW_ATE_imaginary_float"; | |
b7619582 GF |
8950 | case DW_ATE_packed_decimal: |
8951 | return "DW_ATE_packed_decimal"; | |
8952 | case DW_ATE_numeric_string: | |
8953 | return "DW_ATE_numeric_string"; | |
8954 | case DW_ATE_edited: | |
8955 | return "DW_ATE_edited"; | |
8956 | case DW_ATE_signed_fixed: | |
8957 | return "DW_ATE_signed_fixed"; | |
8958 | case DW_ATE_unsigned_fixed: | |
8959 | return "DW_ATE_unsigned_fixed"; | |
8960 | case DW_ATE_decimal_float: | |
8961 | return "DW_ATE_decimal_float"; | |
8962 | /* HP extensions. */ | |
8963 | case DW_ATE_HP_float80: | |
8964 | return "DW_ATE_HP_float80"; | |
8965 | case DW_ATE_HP_complex_float80: | |
8966 | return "DW_ATE_HP_complex_float80"; | |
8967 | case DW_ATE_HP_float128: | |
8968 | return "DW_ATE_HP_float128"; | |
8969 | case DW_ATE_HP_complex_float128: | |
8970 | return "DW_ATE_HP_complex_float128"; | |
8971 | case DW_ATE_HP_floathpintel: | |
8972 | return "DW_ATE_HP_floathpintel"; | |
8973 | case DW_ATE_HP_imaginary_float80: | |
8974 | return "DW_ATE_HP_imaginary_float80"; | |
8975 | case DW_ATE_HP_imaginary_float128: | |
8976 | return "DW_ATE_HP_imaginary_float128"; | |
c906108c SS |
8977 | default: |
8978 | return "DW_ATE_<unknown>"; | |
8979 | } | |
8980 | } | |
8981 | ||
8982 | /* Convert a DWARF call frame info operation to its string name. */ | |
8983 | ||
8984 | #if 0 | |
8985 | static char * | |
aa1ee363 | 8986 | dwarf_cfi_name (unsigned cfi_opc) |
c906108c SS |
8987 | { |
8988 | switch (cfi_opc) | |
8989 | { | |
8990 | case DW_CFA_advance_loc: | |
8991 | return "DW_CFA_advance_loc"; | |
8992 | case DW_CFA_offset: | |
8993 | return "DW_CFA_offset"; | |
8994 | case DW_CFA_restore: | |
8995 | return "DW_CFA_restore"; | |
8996 | case DW_CFA_nop: | |
8997 | return "DW_CFA_nop"; | |
8998 | case DW_CFA_set_loc: | |
8999 | return "DW_CFA_set_loc"; | |
9000 | case DW_CFA_advance_loc1: | |
9001 | return "DW_CFA_advance_loc1"; | |
9002 | case DW_CFA_advance_loc2: | |
9003 | return "DW_CFA_advance_loc2"; | |
9004 | case DW_CFA_advance_loc4: | |
9005 | return "DW_CFA_advance_loc4"; | |
9006 | case DW_CFA_offset_extended: | |
9007 | return "DW_CFA_offset_extended"; | |
9008 | case DW_CFA_restore_extended: | |
9009 | return "DW_CFA_restore_extended"; | |
9010 | case DW_CFA_undefined: | |
9011 | return "DW_CFA_undefined"; | |
9012 | case DW_CFA_same_value: | |
9013 | return "DW_CFA_same_value"; | |
9014 | case DW_CFA_register: | |
9015 | return "DW_CFA_register"; | |
9016 | case DW_CFA_remember_state: | |
9017 | return "DW_CFA_remember_state"; | |
9018 | case DW_CFA_restore_state: | |
9019 | return "DW_CFA_restore_state"; | |
9020 | case DW_CFA_def_cfa: | |
9021 | return "DW_CFA_def_cfa"; | |
9022 | case DW_CFA_def_cfa_register: | |
9023 | return "DW_CFA_def_cfa_register"; | |
9024 | case DW_CFA_def_cfa_offset: | |
9025 | return "DW_CFA_def_cfa_offset"; | |
b7619582 | 9026 | /* DWARF 3. */ |
985cb1a3 JM |
9027 | case DW_CFA_def_cfa_expression: |
9028 | return "DW_CFA_def_cfa_expression"; | |
9029 | case DW_CFA_expression: | |
9030 | return "DW_CFA_expression"; | |
9031 | case DW_CFA_offset_extended_sf: | |
9032 | return "DW_CFA_offset_extended_sf"; | |
9033 | case DW_CFA_def_cfa_sf: | |
9034 | return "DW_CFA_def_cfa_sf"; | |
9035 | case DW_CFA_def_cfa_offset_sf: | |
9036 | return "DW_CFA_def_cfa_offset_sf"; | |
b7619582 GF |
9037 | case DW_CFA_val_offset: |
9038 | return "DW_CFA_val_offset"; | |
9039 | case DW_CFA_val_offset_sf: | |
9040 | return "DW_CFA_val_offset_sf"; | |
9041 | case DW_CFA_val_expression: | |
9042 | return "DW_CFA_val_expression"; | |
9043 | /* SGI/MIPS specific. */ | |
c906108c SS |
9044 | case DW_CFA_MIPS_advance_loc8: |
9045 | return "DW_CFA_MIPS_advance_loc8"; | |
b7619582 | 9046 | /* GNU extensions. */ |
985cb1a3 JM |
9047 | case DW_CFA_GNU_window_save: |
9048 | return "DW_CFA_GNU_window_save"; | |
9049 | case DW_CFA_GNU_args_size: | |
9050 | return "DW_CFA_GNU_args_size"; | |
9051 | case DW_CFA_GNU_negative_offset_extended: | |
9052 | return "DW_CFA_GNU_negative_offset_extended"; | |
c906108c SS |
9053 | default: |
9054 | return "DW_CFA_<unknown>"; | |
9055 | } | |
9056 | } | |
9057 | #endif | |
9058 | ||
f9aca02d | 9059 | static void |
fba45db2 | 9060 | dump_die (struct die_info *die) |
c906108c SS |
9061 | { |
9062 | unsigned int i; | |
9063 | ||
48cd0caa | 9064 | fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n", |
c906108c | 9065 | dwarf_tag_name (die->tag), die->abbrev, die->offset); |
48cd0caa | 9066 | fprintf_unfiltered (gdb_stderr, "\thas children: %s\n", |
639d11d3 | 9067 | dwarf_bool_name (die->child != NULL)); |
c906108c | 9068 | |
48cd0caa | 9069 | fprintf_unfiltered (gdb_stderr, "\tattributes:\n"); |
c906108c SS |
9070 | for (i = 0; i < die->num_attrs; ++i) |
9071 | { | |
48cd0caa | 9072 | fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ", |
c906108c SS |
9073 | dwarf_attr_name (die->attrs[i].name), |
9074 | dwarf_form_name (die->attrs[i].form)); | |
9075 | switch (die->attrs[i].form) | |
9076 | { | |
9077 | case DW_FORM_ref_addr: | |
9078 | case DW_FORM_addr: | |
48cd0caa | 9079 | fprintf_unfiltered (gdb_stderr, "address: "); |
ed49a04f | 9080 | fputs_filtered (paddress (DW_ADDR (&die->attrs[i])), gdb_stderr); |
c906108c SS |
9081 | break; |
9082 | case DW_FORM_block2: | |
9083 | case DW_FORM_block4: | |
9084 | case DW_FORM_block: | |
9085 | case DW_FORM_block1: | |
48cd0caa | 9086 | fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size); |
c906108c | 9087 | break; |
10b3939b DJ |
9088 | case DW_FORM_ref1: |
9089 | case DW_FORM_ref2: | |
9090 | case DW_FORM_ref4: | |
9091 | fprintf_unfiltered (gdb_stderr, "constant ref: %ld (adjusted)", | |
9092 | (long) (DW_ADDR (&die->attrs[i]))); | |
9093 | break; | |
c906108c SS |
9094 | case DW_FORM_data1: |
9095 | case DW_FORM_data2: | |
9096 | case DW_FORM_data4: | |
ce5d95e1 | 9097 | case DW_FORM_data8: |
c906108c SS |
9098 | case DW_FORM_udata: |
9099 | case DW_FORM_sdata: | |
48cd0caa | 9100 | fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i])); |
c906108c SS |
9101 | break; |
9102 | case DW_FORM_string: | |
4bdf3d34 | 9103 | case DW_FORM_strp: |
48cd0caa | 9104 | fprintf_unfiltered (gdb_stderr, "string: \"%s\"", |
c906108c | 9105 | DW_STRING (&die->attrs[i]) |
c5aa993b | 9106 | ? DW_STRING (&die->attrs[i]) : ""); |
c906108c SS |
9107 | break; |
9108 | case DW_FORM_flag: | |
9109 | if (DW_UNSND (&die->attrs[i])) | |
48cd0caa | 9110 | fprintf_unfiltered (gdb_stderr, "flag: TRUE"); |
c906108c | 9111 | else |
48cd0caa | 9112 | fprintf_unfiltered (gdb_stderr, "flag: FALSE"); |
c906108c | 9113 | break; |
a8329558 KW |
9114 | case DW_FORM_indirect: |
9115 | /* the reader will have reduced the indirect form to | |
9116 | the "base form" so this form should not occur */ | |
48cd0caa | 9117 | fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 9118 | break; |
c906108c | 9119 | default: |
48cd0caa | 9120 | fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.", |
c5aa993b | 9121 | die->attrs[i].form); |
c906108c | 9122 | } |
48cd0caa | 9123 | fprintf_unfiltered (gdb_stderr, "\n"); |
c906108c SS |
9124 | } |
9125 | } | |
9126 | ||
f9aca02d | 9127 | static void |
fba45db2 | 9128 | dump_die_list (struct die_info *die) |
c906108c SS |
9129 | { |
9130 | while (die) | |
9131 | { | |
9132 | dump_die (die); | |
639d11d3 DC |
9133 | if (die->child != NULL) |
9134 | dump_die_list (die->child); | |
9135 | if (die->sibling != NULL) | |
9136 | dump_die_list (die->sibling); | |
c906108c SS |
9137 | } |
9138 | } | |
9139 | ||
f9aca02d | 9140 | static void |
51545339 | 9141 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9142 | { |
51545339 | 9143 | void **slot; |
c906108c | 9144 | |
51545339 DJ |
9145 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT); |
9146 | ||
9147 | *slot = die; | |
c906108c SS |
9148 | } |
9149 | ||
9150 | static unsigned int | |
e142c38c | 9151 | dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu) |
c906108c SS |
9152 | { |
9153 | unsigned int result = 0; | |
9154 | ||
9155 | switch (attr->form) | |
9156 | { | |
9157 | case DW_FORM_ref_addr: | |
c906108c SS |
9158 | case DW_FORM_ref1: |
9159 | case DW_FORM_ref2: | |
9160 | case DW_FORM_ref4: | |
613e1657 | 9161 | case DW_FORM_ref8: |
c906108c | 9162 | case DW_FORM_ref_udata: |
10b3939b | 9163 | result = DW_ADDR (attr); |
c906108c SS |
9164 | break; |
9165 | default: | |
4d3c2250 | 9166 | complaint (&symfile_complaints, |
e2e0b3e5 | 9167 | _("unsupported die ref attribute form: '%s'"), |
4d3c2250 | 9168 | dwarf_form_name (attr->form)); |
c906108c SS |
9169 | } |
9170 | return result; | |
9171 | } | |
9172 | ||
a02abb62 JB |
9173 | /* Return the constant value held by the given attribute. Return -1 |
9174 | if the value held by the attribute is not constant. */ | |
9175 | ||
9176 | static int | |
9177 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) | |
9178 | { | |
9179 | if (attr->form == DW_FORM_sdata) | |
9180 | return DW_SND (attr); | |
9181 | else if (attr->form == DW_FORM_udata | |
9182 | || attr->form == DW_FORM_data1 | |
9183 | || attr->form == DW_FORM_data2 | |
9184 | || attr->form == DW_FORM_data4 | |
9185 | || attr->form == DW_FORM_data8) | |
9186 | return DW_UNSND (attr); | |
9187 | else | |
9188 | { | |
e2e0b3e5 | 9189 | complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"), |
a02abb62 JB |
9190 | dwarf_form_name (attr->form)); |
9191 | return default_value; | |
9192 | } | |
9193 | } | |
9194 | ||
03dd20cc DJ |
9195 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
9196 | unit and add it to our queue. */ | |
9197 | ||
9198 | static void | |
9199 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
9200 | struct dwarf2_per_cu_data *per_cu) | |
9201 | { | |
9202 | /* Mark the dependence relation so that we don't flush PER_CU | |
9203 | too early. */ | |
9204 | dwarf2_add_dependence (this_cu, per_cu); | |
9205 | ||
9206 | /* If it's already on the queue, we have nothing to do. */ | |
9207 | if (per_cu->queued) | |
9208 | return; | |
9209 | ||
9210 | /* If the compilation unit is already loaded, just mark it as | |
9211 | used. */ | |
9212 | if (per_cu->cu != NULL) | |
9213 | { | |
9214 | per_cu->cu->last_used = 0; | |
9215 | return; | |
9216 | } | |
9217 | ||
9218 | /* Add it to the queue. */ | |
9219 | queue_comp_unit (per_cu, this_cu->objfile); | |
9220 | } | |
9221 | ||
f9aca02d | 9222 | static struct die_info * |
10b3939b | 9223 | follow_die_ref (struct die_info *src_die, struct attribute *attr, |
f2f0e013 | 9224 | struct dwarf2_cu **ref_cu) |
c906108c SS |
9225 | { |
9226 | struct die_info *die; | |
10b3939b | 9227 | unsigned int offset; |
10b3939b | 9228 | struct die_info temp_die; |
f2f0e013 | 9229 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b DJ |
9230 | |
9231 | offset = dwarf2_get_ref_die_offset (attr, cu); | |
9232 | ||
9233 | if (DW_ADDR (attr) < cu->header.offset | |
9234 | || DW_ADDR (attr) >= cu->header.offset + cu->header.length) | |
9235 | { | |
9236 | struct dwarf2_per_cu_data *per_cu; | |
9237 | per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (attr), | |
9238 | cu->objfile); | |
03dd20cc DJ |
9239 | |
9240 | /* If necessary, add it to the queue and load its DIEs. */ | |
9241 | maybe_queue_comp_unit (cu, per_cu); | |
9242 | ||
10b3939b DJ |
9243 | target_cu = per_cu->cu; |
9244 | } | |
9245 | else | |
9246 | target_cu = cu; | |
c906108c | 9247 | |
f2f0e013 | 9248 | *ref_cu = target_cu; |
51545339 DJ |
9249 | temp_die.offset = offset; |
9250 | die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset); | |
9251 | if (die) | |
9252 | return die; | |
10b3939b | 9253 | |
8a3fe4f8 AC |
9254 | error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE " |
9255 | "at 0x%lx [in module %s]"), | |
1d325ec1 | 9256 | (long) offset, (long) src_die->offset, cu->objfile->name); |
c906108c SS |
9257 | } |
9258 | ||
c906108c SS |
9259 | /* Decode simple location descriptions. |
9260 | Given a pointer to a dwarf block that defines a location, compute | |
9261 | the location and return the value. | |
9262 | ||
4cecd739 DJ |
9263 | NOTE drow/2003-11-18: This function is called in two situations |
9264 | now: for the address of static or global variables (partial symbols | |
9265 | only) and for offsets into structures which are expected to be | |
9266 | (more or less) constant. The partial symbol case should go away, | |
9267 | and only the constant case should remain. That will let this | |
9268 | function complain more accurately. A few special modes are allowed | |
9269 | without complaint for global variables (for instance, global | |
9270 | register values and thread-local values). | |
c906108c SS |
9271 | |
9272 | A location description containing no operations indicates that the | |
4cecd739 | 9273 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
9274 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
9275 | callers will only want a very basic result and this can become a | |
9276 | complaint. | |
c906108c | 9277 | |
c906108c SS |
9278 | Note that stack[0] is unused except as a default error return. |
9279 | Note that stack overflow is not yet handled. */ | |
9280 | ||
9281 | static CORE_ADDR | |
e7c27a73 | 9282 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 9283 | { |
e7c27a73 DJ |
9284 | struct objfile *objfile = cu->objfile; |
9285 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c SS |
9286 | int i; |
9287 | int size = blk->size; | |
fe1b8b76 | 9288 | gdb_byte *data = blk->data; |
c906108c SS |
9289 | CORE_ADDR stack[64]; |
9290 | int stacki; | |
9291 | unsigned int bytes_read, unsnd; | |
fe1b8b76 | 9292 | gdb_byte op; |
c906108c SS |
9293 | |
9294 | i = 0; | |
9295 | stacki = 0; | |
9296 | stack[stacki] = 0; | |
c906108c SS |
9297 | |
9298 | while (i < size) | |
9299 | { | |
c906108c SS |
9300 | op = data[i++]; |
9301 | switch (op) | |
9302 | { | |
f1bea926 JM |
9303 | case DW_OP_lit0: |
9304 | case DW_OP_lit1: | |
9305 | case DW_OP_lit2: | |
9306 | case DW_OP_lit3: | |
9307 | case DW_OP_lit4: | |
9308 | case DW_OP_lit5: | |
9309 | case DW_OP_lit6: | |
9310 | case DW_OP_lit7: | |
9311 | case DW_OP_lit8: | |
9312 | case DW_OP_lit9: | |
9313 | case DW_OP_lit10: | |
9314 | case DW_OP_lit11: | |
9315 | case DW_OP_lit12: | |
9316 | case DW_OP_lit13: | |
9317 | case DW_OP_lit14: | |
9318 | case DW_OP_lit15: | |
9319 | case DW_OP_lit16: | |
9320 | case DW_OP_lit17: | |
9321 | case DW_OP_lit18: | |
9322 | case DW_OP_lit19: | |
9323 | case DW_OP_lit20: | |
9324 | case DW_OP_lit21: | |
9325 | case DW_OP_lit22: | |
9326 | case DW_OP_lit23: | |
9327 | case DW_OP_lit24: | |
9328 | case DW_OP_lit25: | |
9329 | case DW_OP_lit26: | |
9330 | case DW_OP_lit27: | |
9331 | case DW_OP_lit28: | |
9332 | case DW_OP_lit29: | |
9333 | case DW_OP_lit30: | |
9334 | case DW_OP_lit31: | |
9335 | stack[++stacki] = op - DW_OP_lit0; | |
9336 | break; | |
9337 | ||
c906108c SS |
9338 | case DW_OP_reg0: |
9339 | case DW_OP_reg1: | |
9340 | case DW_OP_reg2: | |
9341 | case DW_OP_reg3: | |
9342 | case DW_OP_reg4: | |
9343 | case DW_OP_reg5: | |
9344 | case DW_OP_reg6: | |
9345 | case DW_OP_reg7: | |
9346 | case DW_OP_reg8: | |
9347 | case DW_OP_reg9: | |
9348 | case DW_OP_reg10: | |
9349 | case DW_OP_reg11: | |
9350 | case DW_OP_reg12: | |
9351 | case DW_OP_reg13: | |
9352 | case DW_OP_reg14: | |
9353 | case DW_OP_reg15: | |
9354 | case DW_OP_reg16: | |
9355 | case DW_OP_reg17: | |
9356 | case DW_OP_reg18: | |
9357 | case DW_OP_reg19: | |
9358 | case DW_OP_reg20: | |
9359 | case DW_OP_reg21: | |
9360 | case DW_OP_reg22: | |
9361 | case DW_OP_reg23: | |
9362 | case DW_OP_reg24: | |
9363 | case DW_OP_reg25: | |
9364 | case DW_OP_reg26: | |
9365 | case DW_OP_reg27: | |
9366 | case DW_OP_reg28: | |
9367 | case DW_OP_reg29: | |
9368 | case DW_OP_reg30: | |
9369 | case DW_OP_reg31: | |
c906108c | 9370 | stack[++stacki] = op - DW_OP_reg0; |
4cecd739 DJ |
9371 | if (i < size) |
9372 | dwarf2_complex_location_expr_complaint (); | |
c906108c SS |
9373 | break; |
9374 | ||
9375 | case DW_OP_regx: | |
c906108c SS |
9376 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
9377 | i += bytes_read; | |
c906108c | 9378 | stack[++stacki] = unsnd; |
4cecd739 DJ |
9379 | if (i < size) |
9380 | dwarf2_complex_location_expr_complaint (); | |
c906108c SS |
9381 | break; |
9382 | ||
9383 | case DW_OP_addr: | |
107d2387 | 9384 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
e7c27a73 | 9385 | cu, &bytes_read); |
107d2387 | 9386 | i += bytes_read; |
c906108c SS |
9387 | break; |
9388 | ||
9389 | case DW_OP_const1u: | |
9390 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
9391 | i += 1; | |
9392 | break; | |
9393 | ||
9394 | case DW_OP_const1s: | |
9395 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
9396 | i += 1; | |
9397 | break; | |
9398 | ||
9399 | case DW_OP_const2u: | |
9400 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
9401 | i += 2; | |
9402 | break; | |
9403 | ||
9404 | case DW_OP_const2s: | |
9405 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
9406 | i += 2; | |
9407 | break; | |
9408 | ||
9409 | case DW_OP_const4u: | |
9410 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
9411 | i += 4; | |
9412 | break; | |
9413 | ||
9414 | case DW_OP_const4s: | |
9415 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
9416 | i += 4; | |
9417 | break; | |
9418 | ||
9419 | case DW_OP_constu: | |
9420 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
c5aa993b | 9421 | &bytes_read); |
c906108c SS |
9422 | i += bytes_read; |
9423 | break; | |
9424 | ||
9425 | case DW_OP_consts: | |
9426 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
9427 | i += bytes_read; | |
9428 | break; | |
9429 | ||
f1bea926 JM |
9430 | case DW_OP_dup: |
9431 | stack[stacki + 1] = stack[stacki]; | |
9432 | stacki++; | |
9433 | break; | |
9434 | ||
c906108c SS |
9435 | case DW_OP_plus: |
9436 | stack[stacki - 1] += stack[stacki]; | |
9437 | stacki--; | |
9438 | break; | |
9439 | ||
9440 | case DW_OP_plus_uconst: | |
9441 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
9442 | i += bytes_read; | |
9443 | break; | |
9444 | ||
9445 | case DW_OP_minus: | |
f1bea926 | 9446 | stack[stacki - 1] -= stack[stacki]; |
c906108c SS |
9447 | stacki--; |
9448 | break; | |
9449 | ||
7a292a7a | 9450 | case DW_OP_deref: |
7a292a7a | 9451 | /* If we're not the last op, then we definitely can't encode |
4cecd739 DJ |
9452 | this using GDB's address_class enum. This is valid for partial |
9453 | global symbols, although the variable's address will be bogus | |
9454 | in the psymtab. */ | |
7a292a7a | 9455 | if (i < size) |
4d3c2250 | 9456 | dwarf2_complex_location_expr_complaint (); |
7a292a7a SS |
9457 | break; |
9458 | ||
9d774e44 | 9459 | case DW_OP_GNU_push_tls_address: |
9d774e44 EZ |
9460 | /* The top of the stack has the offset from the beginning |
9461 | of the thread control block at which the variable is located. */ | |
9462 | /* Nothing should follow this operator, so the top of stack would | |
9463 | be returned. */ | |
4cecd739 DJ |
9464 | /* This is valid for partial global symbols, but the variable's |
9465 | address will be bogus in the psymtab. */ | |
9d774e44 | 9466 | if (i < size) |
4d3c2250 | 9467 | dwarf2_complex_location_expr_complaint (); |
9d774e44 EZ |
9468 | break; |
9469 | ||
42be36b3 CT |
9470 | case DW_OP_GNU_uninit: |
9471 | break; | |
9472 | ||
c906108c | 9473 | default: |
e2e0b3e5 | 9474 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), |
4d3c2250 | 9475 | dwarf_stack_op_name (op)); |
c906108c SS |
9476 | return (stack[stacki]); |
9477 | } | |
9478 | } | |
9479 | return (stack[stacki]); | |
9480 | } | |
9481 | ||
9482 | /* memory allocation interface */ | |
9483 | ||
c906108c | 9484 | static struct dwarf_block * |
7b5a2f43 | 9485 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
9486 | { |
9487 | struct dwarf_block *blk; | |
9488 | ||
9489 | blk = (struct dwarf_block *) | |
7b5a2f43 | 9490 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
9491 | return (blk); |
9492 | } | |
9493 | ||
9494 | static struct abbrev_info * | |
f3dd6933 | 9495 | dwarf_alloc_abbrev (struct dwarf2_cu *cu) |
c906108c SS |
9496 | { |
9497 | struct abbrev_info *abbrev; | |
9498 | ||
f3dd6933 DJ |
9499 | abbrev = (struct abbrev_info *) |
9500 | obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info)); | |
c906108c SS |
9501 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
9502 | return (abbrev); | |
9503 | } | |
9504 | ||
9505 | static struct die_info * | |
b60c80d6 | 9506 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
9507 | { |
9508 | struct die_info *die; | |
b60c80d6 DJ |
9509 | size_t size = sizeof (struct die_info); |
9510 | ||
9511 | if (num_attrs > 1) | |
9512 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 9513 | |
b60c80d6 | 9514 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
9515 | memset (die, 0, sizeof (struct die_info)); |
9516 | return (die); | |
9517 | } | |
2e276125 JB |
9518 | |
9519 | \f | |
9520 | /* Macro support. */ | |
9521 | ||
9522 | ||
9523 | /* Return the full name of file number I in *LH's file name table. | |
9524 | Use COMP_DIR as the name of the current directory of the | |
9525 | compilation. The result is allocated using xmalloc; the caller is | |
9526 | responsible for freeing it. */ | |
9527 | static char * | |
9528 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
9529 | { | |
6a83a1e6 EZ |
9530 | /* Is the file number a valid index into the line header's file name |
9531 | table? Remember that file numbers start with one, not zero. */ | |
9532 | if (1 <= file && file <= lh->num_file_names) | |
9533 | { | |
9534 | struct file_entry *fe = &lh->file_names[file - 1]; | |
2e276125 | 9535 | |
6a83a1e6 EZ |
9536 | if (IS_ABSOLUTE_PATH (fe->name)) |
9537 | return xstrdup (fe->name); | |
9538 | else | |
9539 | { | |
9540 | const char *dir; | |
9541 | int dir_len; | |
9542 | char *full_name; | |
9543 | ||
9544 | if (fe->dir_index) | |
9545 | dir = lh->include_dirs[fe->dir_index - 1]; | |
9546 | else | |
9547 | dir = comp_dir; | |
9548 | ||
9549 | if (dir) | |
9550 | { | |
9551 | dir_len = strlen (dir); | |
9552 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); | |
9553 | strcpy (full_name, dir); | |
9554 | full_name[dir_len] = '/'; | |
9555 | strcpy (full_name + dir_len + 1, fe->name); | |
9556 | return full_name; | |
9557 | } | |
9558 | else | |
9559 | return xstrdup (fe->name); | |
9560 | } | |
9561 | } | |
2e276125 JB |
9562 | else |
9563 | { | |
6a83a1e6 EZ |
9564 | /* The compiler produced a bogus file number. We can at least |
9565 | record the macro definitions made in the file, even if we | |
9566 | won't be able to find the file by name. */ | |
9567 | char fake_name[80]; | |
9568 | sprintf (fake_name, "<bad macro file number %d>", file); | |
2e276125 | 9569 | |
6a83a1e6 EZ |
9570 | complaint (&symfile_complaints, |
9571 | _("bad file number in macro information (%d)"), | |
9572 | file); | |
2e276125 | 9573 | |
6a83a1e6 | 9574 | return xstrdup (fake_name); |
2e276125 JB |
9575 | } |
9576 | } | |
9577 | ||
9578 | ||
9579 | static struct macro_source_file * | |
9580 | macro_start_file (int file, int line, | |
9581 | struct macro_source_file *current_file, | |
9582 | const char *comp_dir, | |
9583 | struct line_header *lh, struct objfile *objfile) | |
9584 | { | |
9585 | /* The full name of this source file. */ | |
9586 | char *full_name = file_full_name (file, lh, comp_dir); | |
9587 | ||
9588 | /* We don't create a macro table for this compilation unit | |
9589 | at all until we actually get a filename. */ | |
9590 | if (! pending_macros) | |
4a146b47 | 9591 | pending_macros = new_macro_table (&objfile->objfile_obstack, |
af5f3db6 | 9592 | objfile->macro_cache); |
2e276125 JB |
9593 | |
9594 | if (! current_file) | |
9595 | /* If we have no current file, then this must be the start_file | |
9596 | directive for the compilation unit's main source file. */ | |
9597 | current_file = macro_set_main (pending_macros, full_name); | |
9598 | else | |
9599 | current_file = macro_include (current_file, line, full_name); | |
9600 | ||
9601 | xfree (full_name); | |
9602 | ||
9603 | return current_file; | |
9604 | } | |
9605 | ||
9606 | ||
9607 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
9608 | followed by a null byte. */ | |
9609 | static char * | |
9610 | copy_string (const char *buf, int len) | |
9611 | { | |
9612 | char *s = xmalloc (len + 1); | |
9613 | memcpy (s, buf, len); | |
9614 | s[len] = '\0'; | |
9615 | ||
9616 | return s; | |
9617 | } | |
9618 | ||
9619 | ||
9620 | static const char * | |
9621 | consume_improper_spaces (const char *p, const char *body) | |
9622 | { | |
9623 | if (*p == ' ') | |
9624 | { | |
4d3c2250 | 9625 | complaint (&symfile_complaints, |
e2e0b3e5 | 9626 | _("macro definition contains spaces in formal argument list:\n`%s'"), |
4d3c2250 | 9627 | body); |
2e276125 JB |
9628 | |
9629 | while (*p == ' ') | |
9630 | p++; | |
9631 | } | |
9632 | ||
9633 | return p; | |
9634 | } | |
9635 | ||
9636 | ||
9637 | static void | |
9638 | parse_macro_definition (struct macro_source_file *file, int line, | |
9639 | const char *body) | |
9640 | { | |
9641 | const char *p; | |
9642 | ||
9643 | /* The body string takes one of two forms. For object-like macro | |
9644 | definitions, it should be: | |
9645 | ||
9646 | <macro name> " " <definition> | |
9647 | ||
9648 | For function-like macro definitions, it should be: | |
9649 | ||
9650 | <macro name> "() " <definition> | |
9651 | or | |
9652 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
9653 | ||
9654 | Spaces may appear only where explicitly indicated, and in the | |
9655 | <definition>. | |
9656 | ||
9657 | The Dwarf 2 spec says that an object-like macro's name is always | |
9658 | followed by a space, but versions of GCC around March 2002 omit | |
9659 | the space when the macro's definition is the empty string. | |
9660 | ||
9661 | The Dwarf 2 spec says that there should be no spaces between the | |
9662 | formal arguments in a function-like macro's formal argument list, | |
9663 | but versions of GCC around March 2002 include spaces after the | |
9664 | commas. */ | |
9665 | ||
9666 | ||
9667 | /* Find the extent of the macro name. The macro name is terminated | |
9668 | by either a space or null character (for an object-like macro) or | |
9669 | an opening paren (for a function-like macro). */ | |
9670 | for (p = body; *p; p++) | |
9671 | if (*p == ' ' || *p == '(') | |
9672 | break; | |
9673 | ||
9674 | if (*p == ' ' || *p == '\0') | |
9675 | { | |
9676 | /* It's an object-like macro. */ | |
9677 | int name_len = p - body; | |
9678 | char *name = copy_string (body, name_len); | |
9679 | const char *replacement; | |
9680 | ||
9681 | if (*p == ' ') | |
9682 | replacement = body + name_len + 1; | |
9683 | else | |
9684 | { | |
4d3c2250 | 9685 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9686 | replacement = body + name_len; |
9687 | } | |
9688 | ||
9689 | macro_define_object (file, line, name, replacement); | |
9690 | ||
9691 | xfree (name); | |
9692 | } | |
9693 | else if (*p == '(') | |
9694 | { | |
9695 | /* It's a function-like macro. */ | |
9696 | char *name = copy_string (body, p - body); | |
9697 | int argc = 0; | |
9698 | int argv_size = 1; | |
9699 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
9700 | ||
9701 | p++; | |
9702 | ||
9703 | p = consume_improper_spaces (p, body); | |
9704 | ||
9705 | /* Parse the formal argument list. */ | |
9706 | while (*p && *p != ')') | |
9707 | { | |
9708 | /* Find the extent of the current argument name. */ | |
9709 | const char *arg_start = p; | |
9710 | ||
9711 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
9712 | p++; | |
9713 | ||
9714 | if (! *p || p == arg_start) | |
4d3c2250 | 9715 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9716 | else |
9717 | { | |
9718 | /* Make sure argv has room for the new argument. */ | |
9719 | if (argc >= argv_size) | |
9720 | { | |
9721 | argv_size *= 2; | |
9722 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
9723 | } | |
9724 | ||
9725 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
9726 | } | |
9727 | ||
9728 | p = consume_improper_spaces (p, body); | |
9729 | ||
9730 | /* Consume the comma, if present. */ | |
9731 | if (*p == ',') | |
9732 | { | |
9733 | p++; | |
9734 | ||
9735 | p = consume_improper_spaces (p, body); | |
9736 | } | |
9737 | } | |
9738 | ||
9739 | if (*p == ')') | |
9740 | { | |
9741 | p++; | |
9742 | ||
9743 | if (*p == ' ') | |
9744 | /* Perfectly formed definition, no complaints. */ | |
9745 | macro_define_function (file, line, name, | |
9746 | argc, (const char **) argv, | |
9747 | p + 1); | |
9748 | else if (*p == '\0') | |
9749 | { | |
9750 | /* Complain, but do define it. */ | |
4d3c2250 | 9751 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9752 | macro_define_function (file, line, name, |
9753 | argc, (const char **) argv, | |
9754 | p); | |
9755 | } | |
9756 | else | |
9757 | /* Just complain. */ | |
4d3c2250 | 9758 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9759 | } |
9760 | else | |
9761 | /* Just complain. */ | |
4d3c2250 | 9762 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9763 | |
9764 | xfree (name); | |
9765 | { | |
9766 | int i; | |
9767 | ||
9768 | for (i = 0; i < argc; i++) | |
9769 | xfree (argv[i]); | |
9770 | } | |
9771 | xfree (argv); | |
9772 | } | |
9773 | else | |
4d3c2250 | 9774 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
9775 | } |
9776 | ||
9777 | ||
9778 | static void | |
9779 | dwarf_decode_macros (struct line_header *lh, unsigned int offset, | |
9780 | char *comp_dir, bfd *abfd, | |
e7c27a73 | 9781 | struct dwarf2_cu *cu) |
2e276125 | 9782 | { |
fe1b8b76 | 9783 | gdb_byte *mac_ptr, *mac_end; |
2e276125 JB |
9784 | struct macro_source_file *current_file = 0; |
9785 | ||
6502dd73 | 9786 | if (dwarf2_per_objfile->macinfo_buffer == NULL) |
2e276125 | 9787 | { |
e2e0b3e5 | 9788 | complaint (&symfile_complaints, _("missing .debug_macinfo section")); |
2e276125 JB |
9789 | return; |
9790 | } | |
9791 | ||
6502dd73 DJ |
9792 | mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset; |
9793 | mac_end = dwarf2_per_objfile->macinfo_buffer | |
9794 | + dwarf2_per_objfile->macinfo_size; | |
2e276125 JB |
9795 | |
9796 | for (;;) | |
9797 | { | |
9798 | enum dwarf_macinfo_record_type macinfo_type; | |
9799 | ||
9800 | /* Do we at least have room for a macinfo type byte? */ | |
9801 | if (mac_ptr >= mac_end) | |
9802 | { | |
4d3c2250 | 9803 | dwarf2_macros_too_long_complaint (); |
2e276125 JB |
9804 | return; |
9805 | } | |
9806 | ||
9807 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
9808 | mac_ptr++; | |
9809 | ||
9810 | switch (macinfo_type) | |
9811 | { | |
9812 | /* A zero macinfo type indicates the end of the macro | |
9813 | information. */ | |
9814 | case 0: | |
9815 | return; | |
9816 | ||
9817 | case DW_MACINFO_define: | |
9818 | case DW_MACINFO_undef: | |
9819 | { | |
891d2f0b | 9820 | unsigned int bytes_read; |
2e276125 JB |
9821 | int line; |
9822 | char *body; | |
9823 | ||
9824 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
9825 | mac_ptr += bytes_read; | |
9826 | body = read_string (abfd, mac_ptr, &bytes_read); | |
9827 | mac_ptr += bytes_read; | |
9828 | ||
9829 | if (! current_file) | |
4d3c2250 | 9830 | complaint (&symfile_complaints, |
e2e0b3e5 | 9831 | _("debug info gives macro %s outside of any file: %s"), |
4d3c2250 KB |
9832 | macinfo_type == |
9833 | DW_MACINFO_define ? "definition" : macinfo_type == | |
9834 | DW_MACINFO_undef ? "undefinition" : | |
9835 | "something-or-other", body); | |
2e276125 JB |
9836 | else |
9837 | { | |
9838 | if (macinfo_type == DW_MACINFO_define) | |
9839 | parse_macro_definition (current_file, line, body); | |
9840 | else if (macinfo_type == DW_MACINFO_undef) | |
9841 | macro_undef (current_file, line, body); | |
9842 | } | |
9843 | } | |
9844 | break; | |
9845 | ||
9846 | case DW_MACINFO_start_file: | |
9847 | { | |
891d2f0b | 9848 | unsigned int bytes_read; |
2e276125 JB |
9849 | int line, file; |
9850 | ||
9851 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
9852 | mac_ptr += bytes_read; | |
9853 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
9854 | mac_ptr += bytes_read; | |
9855 | ||
9856 | current_file = macro_start_file (file, line, | |
9857 | current_file, comp_dir, | |
e7c27a73 | 9858 | lh, cu->objfile); |
2e276125 JB |
9859 | } |
9860 | break; | |
9861 | ||
9862 | case DW_MACINFO_end_file: | |
9863 | if (! current_file) | |
4d3c2250 | 9864 | complaint (&symfile_complaints, |
e2e0b3e5 | 9865 | _("macro debug info has an unmatched `close_file' directive")); |
2e276125 JB |
9866 | else |
9867 | { | |
9868 | current_file = current_file->included_by; | |
9869 | if (! current_file) | |
9870 | { | |
9871 | enum dwarf_macinfo_record_type next_type; | |
9872 | ||
9873 | /* GCC circa March 2002 doesn't produce the zero | |
9874 | type byte marking the end of the compilation | |
9875 | unit. Complain if it's not there, but exit no | |
9876 | matter what. */ | |
9877 | ||
9878 | /* Do we at least have room for a macinfo type byte? */ | |
9879 | if (mac_ptr >= mac_end) | |
9880 | { | |
4d3c2250 | 9881 | dwarf2_macros_too_long_complaint (); |
2e276125 JB |
9882 | return; |
9883 | } | |
9884 | ||
9885 | /* We don't increment mac_ptr here, so this is just | |
9886 | a look-ahead. */ | |
9887 | next_type = read_1_byte (abfd, mac_ptr); | |
9888 | if (next_type != 0) | |
4d3c2250 | 9889 | complaint (&symfile_complaints, |
e2e0b3e5 | 9890 | _("no terminating 0-type entry for macros in `.debug_macinfo' section")); |
2e276125 JB |
9891 | |
9892 | return; | |
9893 | } | |
9894 | } | |
9895 | break; | |
9896 | ||
9897 | case DW_MACINFO_vendor_ext: | |
9898 | { | |
891d2f0b | 9899 | unsigned int bytes_read; |
2e276125 JB |
9900 | int constant; |
9901 | char *string; | |
9902 | ||
9903 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
9904 | mac_ptr += bytes_read; | |
9905 | string = read_string (abfd, mac_ptr, &bytes_read); | |
9906 | mac_ptr += bytes_read; | |
9907 | ||
9908 | /* We don't recognize any vendor extensions. */ | |
9909 | } | |
9910 | break; | |
9911 | } | |
9912 | } | |
9913 | } | |
8e19ed76 PS |
9914 | |
9915 | /* Check if the attribute's form is a DW_FORM_block* | |
9916 | if so return true else false. */ | |
9917 | static int | |
9918 | attr_form_is_block (struct attribute *attr) | |
9919 | { | |
9920 | return (attr == NULL ? 0 : | |
9921 | attr->form == DW_FORM_block1 | |
9922 | || attr->form == DW_FORM_block2 | |
9923 | || attr->form == DW_FORM_block4 | |
9924 | || attr->form == DW_FORM_block); | |
9925 | } | |
4c2df51b | 9926 | |
c6a0999f JB |
9927 | /* Return non-zero if ATTR's value is a section offset --- classes |
9928 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
9929 | You may use DW_UNSND (attr) to retrieve such offsets. | |
9930 | ||
9931 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
9932 | may have a value that belongs to more than one of these classes; it | |
9933 | would be ambiguous if we did, because we use the same forms for all | |
9934 | of them. */ | |
3690dd37 JB |
9935 | static int |
9936 | attr_form_is_section_offset (struct attribute *attr) | |
9937 | { | |
9938 | return (attr->form == DW_FORM_data4 | |
9939 | || attr->form == DW_FORM_data8); | |
9940 | } | |
9941 | ||
9942 | ||
9943 | /* Return non-zero if ATTR's value falls in the 'constant' class, or | |
9944 | zero otherwise. When this function returns true, you can apply | |
9945 | dwarf2_get_attr_constant_value to it. | |
9946 | ||
9947 | However, note that for some attributes you must check | |
9948 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
9949 | and DW_FORM_data8 are members of both the constant class, and of | |
9950 | the classes that contain offsets into other debug sections | |
9951 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
9952 | that, if an attribute's can be either a constant or one of the | |
9953 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
9954 | taken as section offsets, not constants. */ | |
9955 | static int | |
9956 | attr_form_is_constant (struct attribute *attr) | |
9957 | { | |
9958 | switch (attr->form) | |
9959 | { | |
9960 | case DW_FORM_sdata: | |
9961 | case DW_FORM_udata: | |
9962 | case DW_FORM_data1: | |
9963 | case DW_FORM_data2: | |
9964 | case DW_FORM_data4: | |
9965 | case DW_FORM_data8: | |
9966 | return 1; | |
9967 | default: | |
9968 | return 0; | |
9969 | } | |
9970 | } | |
9971 | ||
4c2df51b DJ |
9972 | static void |
9973 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 9974 | struct dwarf2_cu *cu) |
4c2df51b | 9975 | { |
3690dd37 | 9976 | if (attr_form_is_section_offset (attr) |
99bcc461 DJ |
9977 | /* ".debug_loc" may not exist at all, or the offset may be outside |
9978 | the section. If so, fall through to the complaint in the | |
9979 | other branch. */ | |
9980 | && DW_UNSND (attr) < dwarf2_per_objfile->loc_size) | |
4c2df51b | 9981 | { |
0d53c4c4 | 9982 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 9983 | |
4a146b47 | 9984 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
0d53c4c4 | 9985 | sizeof (struct dwarf2_loclist_baton)); |
ae0d2f24 UW |
9986 | baton->per_cu = cu->per_cu; |
9987 | gdb_assert (baton->per_cu); | |
4c2df51b | 9988 | |
0d53c4c4 DJ |
9989 | /* We don't know how long the location list is, but make sure we |
9990 | don't run off the edge of the section. */ | |
6502dd73 DJ |
9991 | baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr); |
9992 | baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr); | |
d00adf39 DE |
9993 | baton->base_address = cu->base_address; |
9994 | if (cu->base_known == 0) | |
0d53c4c4 | 9995 | complaint (&symfile_complaints, |
e2e0b3e5 | 9996 | _("Location list used without specifying the CU base address.")); |
4c2df51b | 9997 | |
a67af2b9 | 9998 | SYMBOL_OPS (sym) = &dwarf2_loclist_funcs; |
0d53c4c4 DJ |
9999 | SYMBOL_LOCATION_BATON (sym) = baton; |
10000 | } | |
10001 | else | |
10002 | { | |
10003 | struct dwarf2_locexpr_baton *baton; | |
10004 | ||
4a146b47 | 10005 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
0d53c4c4 | 10006 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
10007 | baton->per_cu = cu->per_cu; |
10008 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
10009 | |
10010 | if (attr_form_is_block (attr)) | |
10011 | { | |
10012 | /* Note that we're just copying the block's data pointer | |
10013 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
10014 | info_buffer for SYM's objfile; right now we never release |
10015 | that buffer, but when we do clean up properly this may | |
10016 | need to change. */ | |
0d53c4c4 DJ |
10017 | baton->size = DW_BLOCK (attr)->size; |
10018 | baton->data = DW_BLOCK (attr)->data; | |
10019 | } | |
10020 | else | |
10021 | { | |
10022 | dwarf2_invalid_attrib_class_complaint ("location description", | |
10023 | SYMBOL_NATURAL_NAME (sym)); | |
10024 | baton->size = 0; | |
10025 | baton->data = NULL; | |
10026 | } | |
10027 | ||
a67af2b9 | 10028 | SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs; |
0d53c4c4 DJ |
10029 | SYMBOL_LOCATION_BATON (sym) = baton; |
10030 | } | |
4c2df51b | 10031 | } |
6502dd73 | 10032 | |
ae0d2f24 UW |
10033 | /* Return the OBJFILE associated with the compilation unit CU. */ |
10034 | ||
10035 | struct objfile * | |
10036 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
10037 | { | |
10038 | struct objfile *objfile = per_cu->psymtab->objfile; | |
10039 | ||
10040 | /* Return the master objfile, so that we can report and look up the | |
10041 | correct file containing this variable. */ | |
10042 | if (objfile->separate_debug_objfile_backlink) | |
10043 | objfile = objfile->separate_debug_objfile_backlink; | |
10044 | ||
10045 | return objfile; | |
10046 | } | |
10047 | ||
10048 | /* Return the address size given in the compilation unit header for CU. */ | |
10049 | ||
10050 | CORE_ADDR | |
10051 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) | |
10052 | { | |
10053 | if (per_cu->cu) | |
10054 | return per_cu->cu->header.addr_size; | |
10055 | else | |
10056 | { | |
10057 | /* If the CU is not currently read in, we re-read its header. */ | |
10058 | struct objfile *objfile = per_cu->psymtab->objfile; | |
10059 | struct dwarf2_per_objfile *per_objfile | |
10060 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
10061 | gdb_byte *info_ptr = per_objfile->info_buffer + per_cu->offset; | |
10062 | ||
10063 | struct comp_unit_head cu_header; | |
10064 | memset (&cu_header, 0, sizeof cu_header); | |
10065 | read_comp_unit_head (&cu_header, info_ptr, objfile->obfd); | |
10066 | return cu_header.addr_size; | |
10067 | } | |
10068 | } | |
10069 | ||
ae038cb0 | 10070 | /* Locate the compilation unit from CU's objfile which contains the |
10b3939b | 10071 | DIE at OFFSET. Raises an error on failure. */ |
ae038cb0 DJ |
10072 | |
10073 | static struct dwarf2_per_cu_data * | |
10074 | dwarf2_find_containing_comp_unit (unsigned long offset, | |
10075 | struct objfile *objfile) | |
10076 | { | |
10077 | struct dwarf2_per_cu_data *this_cu; | |
10078 | int low, high; | |
10079 | ||
ae038cb0 DJ |
10080 | low = 0; |
10081 | high = dwarf2_per_objfile->n_comp_units - 1; | |
10082 | while (high > low) | |
10083 | { | |
10084 | int mid = low + (high - low) / 2; | |
10085 | if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset) | |
10086 | high = mid; | |
10087 | else | |
10088 | low = mid + 1; | |
10089 | } | |
10090 | gdb_assert (low == high); | |
10091 | if (dwarf2_per_objfile->all_comp_units[low]->offset > offset) | |
10092 | { | |
10b3939b | 10093 | if (low == 0) |
8a3fe4f8 AC |
10094 | error (_("Dwarf Error: could not find partial DIE containing " |
10095 | "offset 0x%lx [in module %s]"), | |
10b3939b DJ |
10096 | (long) offset, bfd_get_filename (objfile->obfd)); |
10097 | ||
ae038cb0 DJ |
10098 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset); |
10099 | return dwarf2_per_objfile->all_comp_units[low-1]; | |
10100 | } | |
10101 | else | |
10102 | { | |
10103 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
10104 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
10105 | && offset >= this_cu->offset + this_cu->length) | |
8a3fe4f8 | 10106 | error (_("invalid dwarf2 offset %ld"), offset); |
ae038cb0 DJ |
10107 | gdb_assert (offset < this_cu->offset + this_cu->length); |
10108 | return this_cu; | |
10109 | } | |
10110 | } | |
10111 | ||
10b3939b DJ |
10112 | /* Locate the compilation unit from OBJFILE which is located at exactly |
10113 | OFFSET. Raises an error on failure. */ | |
10114 | ||
ae038cb0 DJ |
10115 | static struct dwarf2_per_cu_data * |
10116 | dwarf2_find_comp_unit (unsigned long offset, struct objfile *objfile) | |
10117 | { | |
10118 | struct dwarf2_per_cu_data *this_cu; | |
10119 | this_cu = dwarf2_find_containing_comp_unit (offset, objfile); | |
10120 | if (this_cu->offset != offset) | |
8a3fe4f8 | 10121 | error (_("no compilation unit with offset %ld."), offset); |
ae038cb0 DJ |
10122 | return this_cu; |
10123 | } | |
10124 | ||
10125 | /* Release one cached compilation unit, CU. We unlink it from the tree | |
10126 | of compilation units, but we don't remove it from the read_in_chain; | |
10127 | the caller is responsible for that. */ | |
10128 | ||
10129 | static void | |
10130 | free_one_comp_unit (void *data) | |
10131 | { | |
10132 | struct dwarf2_cu *cu = data; | |
10133 | ||
10134 | if (cu->per_cu != NULL) | |
10135 | cu->per_cu->cu = NULL; | |
10136 | cu->per_cu = NULL; | |
10137 | ||
10138 | obstack_free (&cu->comp_unit_obstack, NULL); | |
10139 | ||
10140 | xfree (cu); | |
10141 | } | |
10142 | ||
72bf9492 | 10143 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 DJ |
10144 | when we're finished with it. We can't free the pointer itself, but be |
10145 | sure to unlink it from the cache. Also release any associated storage | |
10146 | and perform cache maintenance. | |
72bf9492 DJ |
10147 | |
10148 | Only used during partial symbol parsing. */ | |
10149 | ||
10150 | static void | |
10151 | free_stack_comp_unit (void *data) | |
10152 | { | |
10153 | struct dwarf2_cu *cu = data; | |
10154 | ||
10155 | obstack_free (&cu->comp_unit_obstack, NULL); | |
10156 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
10157 | |
10158 | if (cu->per_cu != NULL) | |
10159 | { | |
10160 | /* This compilation unit is on the stack in our caller, so we | |
10161 | should not xfree it. Just unlink it. */ | |
10162 | cu->per_cu->cu = NULL; | |
10163 | cu->per_cu = NULL; | |
10164 | ||
10165 | /* If we had a per-cu pointer, then we may have other compilation | |
10166 | units loaded, so age them now. */ | |
10167 | age_cached_comp_units (); | |
10168 | } | |
10169 | } | |
10170 | ||
10171 | /* Free all cached compilation units. */ | |
10172 | ||
10173 | static void | |
10174 | free_cached_comp_units (void *data) | |
10175 | { | |
10176 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10177 | ||
10178 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10179 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10180 | while (per_cu != NULL) | |
10181 | { | |
10182 | struct dwarf2_per_cu_data *next_cu; | |
10183 | ||
10184 | next_cu = per_cu->cu->read_in_chain; | |
10185 | ||
10186 | free_one_comp_unit (per_cu->cu); | |
10187 | *last_chain = next_cu; | |
10188 | ||
10189 | per_cu = next_cu; | |
10190 | } | |
10191 | } | |
10192 | ||
10193 | /* Increase the age counter on each cached compilation unit, and free | |
10194 | any that are too old. */ | |
10195 | ||
10196 | static void | |
10197 | age_cached_comp_units (void) | |
10198 | { | |
10199 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10200 | ||
10201 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
10202 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10203 | while (per_cu != NULL) | |
10204 | { | |
10205 | per_cu->cu->last_used ++; | |
10206 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
10207 | dwarf2_mark (per_cu->cu); | |
10208 | per_cu = per_cu->cu->read_in_chain; | |
10209 | } | |
10210 | ||
10211 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10212 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10213 | while (per_cu != NULL) | |
10214 | { | |
10215 | struct dwarf2_per_cu_data *next_cu; | |
10216 | ||
10217 | next_cu = per_cu->cu->read_in_chain; | |
10218 | ||
10219 | if (!per_cu->cu->mark) | |
10220 | { | |
10221 | free_one_comp_unit (per_cu->cu); | |
10222 | *last_chain = next_cu; | |
10223 | } | |
10224 | else | |
10225 | last_chain = &per_cu->cu->read_in_chain; | |
10226 | ||
10227 | per_cu = next_cu; | |
10228 | } | |
10229 | } | |
10230 | ||
10231 | /* Remove a single compilation unit from the cache. */ | |
10232 | ||
10233 | static void | |
10234 | free_one_cached_comp_unit (void *target_cu) | |
10235 | { | |
10236 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
10237 | ||
10238 | per_cu = dwarf2_per_objfile->read_in_chain; | |
10239 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
10240 | while (per_cu != NULL) | |
10241 | { | |
10242 | struct dwarf2_per_cu_data *next_cu; | |
10243 | ||
10244 | next_cu = per_cu->cu->read_in_chain; | |
10245 | ||
10246 | if (per_cu->cu == target_cu) | |
10247 | { | |
10248 | free_one_comp_unit (per_cu->cu); | |
10249 | *last_chain = next_cu; | |
10250 | break; | |
10251 | } | |
10252 | else | |
10253 | last_chain = &per_cu->cu->read_in_chain; | |
10254 | ||
10255 | per_cu = next_cu; | |
10256 | } | |
10257 | } | |
10258 | ||
fe3e1990 DJ |
10259 | /* Release all extra memory associated with OBJFILE. */ |
10260 | ||
10261 | void | |
10262 | dwarf2_free_objfile (struct objfile *objfile) | |
10263 | { | |
10264 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10265 | ||
10266 | if (dwarf2_per_objfile == NULL) | |
10267 | return; | |
10268 | ||
10269 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
10270 | free_cached_comp_units (NULL); | |
10271 | ||
10272 | /* Everything else should be on the objfile obstack. */ | |
10273 | } | |
10274 | ||
1c379e20 DJ |
10275 | /* A pair of DIE offset and GDB type pointer. We store these |
10276 | in a hash table separate from the DIEs, and preserve them | |
10277 | when the DIEs are flushed out of cache. */ | |
10278 | ||
10279 | struct dwarf2_offset_and_type | |
10280 | { | |
10281 | unsigned int offset; | |
10282 | struct type *type; | |
10283 | }; | |
10284 | ||
10285 | /* Hash function for a dwarf2_offset_and_type. */ | |
10286 | ||
10287 | static hashval_t | |
10288 | offset_and_type_hash (const void *item) | |
10289 | { | |
10290 | const struct dwarf2_offset_and_type *ofs = item; | |
10291 | return ofs->offset; | |
10292 | } | |
10293 | ||
10294 | /* Equality function for a dwarf2_offset_and_type. */ | |
10295 | ||
10296 | static int | |
10297 | offset_and_type_eq (const void *item_lhs, const void *item_rhs) | |
10298 | { | |
10299 | const struct dwarf2_offset_and_type *ofs_lhs = item_lhs; | |
10300 | const struct dwarf2_offset_and_type *ofs_rhs = item_rhs; | |
10301 | return ofs_lhs->offset == ofs_rhs->offset; | |
10302 | } | |
10303 | ||
10304 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
f792889a | 10305 | table if necessary. For convenience, return TYPE. */ |
1c379e20 | 10306 | |
f792889a | 10307 | static struct type * |
1c379e20 DJ |
10308 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
10309 | { | |
10310 | struct dwarf2_offset_and_type **slot, ofs; | |
10311 | ||
f792889a DJ |
10312 | if (cu->type_hash == NULL) |
10313 | { | |
10314 | gdb_assert (cu->per_cu != NULL); | |
10315 | cu->per_cu->type_hash | |
10316 | = htab_create_alloc_ex (cu->header.length / 24, | |
10317 | offset_and_type_hash, | |
10318 | offset_and_type_eq, | |
10319 | NULL, | |
10320 | &cu->objfile->objfile_obstack, | |
10321 | hashtab_obstack_allocate, | |
10322 | dummy_obstack_deallocate); | |
10323 | cu->type_hash = cu->per_cu->type_hash; | |
10324 | } | |
1c379e20 DJ |
10325 | |
10326 | ofs.offset = die->offset; | |
10327 | ofs.type = type; | |
10328 | slot = (struct dwarf2_offset_and_type **) | |
f792889a | 10329 | htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT); |
1c379e20 DJ |
10330 | *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot)); |
10331 | **slot = ofs; | |
f792889a | 10332 | return type; |
1c379e20 DJ |
10333 | } |
10334 | ||
f792889a DJ |
10335 | /* Find the type for DIE in CU's type_hash, or return NULL if DIE does |
10336 | not have a saved type. */ | |
1c379e20 DJ |
10337 | |
10338 | static struct type * | |
f792889a | 10339 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) |
1c379e20 DJ |
10340 | { |
10341 | struct dwarf2_offset_and_type *slot, ofs; | |
f792889a DJ |
10342 | htab_t type_hash = cu->type_hash; |
10343 | ||
10344 | if (type_hash == NULL) | |
10345 | return NULL; | |
1c379e20 DJ |
10346 | |
10347 | ofs.offset = die->offset; | |
10348 | slot = htab_find_with_hash (type_hash, &ofs, ofs.offset); | |
10349 | if (slot) | |
10350 | return slot->type; | |
10351 | else | |
10352 | return NULL; | |
10353 | } | |
10354 | ||
10b3939b DJ |
10355 | /* Set the mark field in CU and in every other compilation unit in the |
10356 | cache that we must keep because we are keeping CU. */ | |
10357 | ||
10358 | /* Add a dependence relationship from CU to REF_PER_CU. */ | |
10359 | ||
10360 | static void | |
10361 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
10362 | struct dwarf2_per_cu_data *ref_per_cu) | |
10363 | { | |
10364 | void **slot; | |
10365 | ||
10366 | if (cu->dependencies == NULL) | |
10367 | cu->dependencies | |
10368 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
10369 | NULL, &cu->comp_unit_obstack, | |
10370 | hashtab_obstack_allocate, | |
10371 | dummy_obstack_deallocate); | |
10372 | ||
10373 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
10374 | if (*slot == NULL) | |
10375 | *slot = ref_per_cu; | |
10376 | } | |
1c379e20 | 10377 | |
ae038cb0 DJ |
10378 | /* Set the mark field in CU and in every other compilation unit in the |
10379 | cache that we must keep because we are keeping CU. */ | |
10380 | ||
10b3939b DJ |
10381 | static int |
10382 | dwarf2_mark_helper (void **slot, void *data) | |
10383 | { | |
10384 | struct dwarf2_per_cu_data *per_cu; | |
10385 | ||
10386 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
10387 | if (per_cu->cu->mark) | |
10388 | return 1; | |
10389 | per_cu->cu->mark = 1; | |
10390 | ||
10391 | if (per_cu->cu->dependencies != NULL) | |
10392 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
10393 | ||
10394 | return 1; | |
10395 | } | |
10396 | ||
ae038cb0 DJ |
10397 | static void |
10398 | dwarf2_mark (struct dwarf2_cu *cu) | |
10399 | { | |
10400 | if (cu->mark) | |
10401 | return; | |
10402 | cu->mark = 1; | |
10b3939b DJ |
10403 | if (cu->dependencies != NULL) |
10404 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
10405 | } |
10406 | ||
10407 | static void | |
10408 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
10409 | { | |
10410 | while (per_cu) | |
10411 | { | |
10412 | per_cu->cu->mark = 0; | |
10413 | per_cu = per_cu->cu->read_in_chain; | |
10414 | } | |
72bf9492 DJ |
10415 | } |
10416 | ||
72bf9492 DJ |
10417 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
10418 | is its offset in .debug_info for this objfile. */ | |
10419 | ||
10420 | static hashval_t | |
10421 | partial_die_hash (const void *item) | |
10422 | { | |
10423 | const struct partial_die_info *part_die = item; | |
10424 | return part_die->offset; | |
10425 | } | |
10426 | ||
10427 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
10428 | are equal if they have the same offset. */ | |
10429 | ||
10430 | static int | |
10431 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
10432 | { | |
10433 | const struct partial_die_info *part_die_lhs = item_lhs; | |
10434 | const struct partial_die_info *part_die_rhs = item_rhs; | |
10435 | return part_die_lhs->offset == part_die_rhs->offset; | |
10436 | } | |
10437 | ||
ae038cb0 DJ |
10438 | static struct cmd_list_element *set_dwarf2_cmdlist; |
10439 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
10440 | ||
10441 | static void | |
10442 | set_dwarf2_cmd (char *args, int from_tty) | |
10443 | { | |
10444 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
10445 | } | |
10446 | ||
10447 | static void | |
10448 | show_dwarf2_cmd (char *args, int from_tty) | |
10449 | { | |
10450 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); | |
10451 | } | |
10452 | ||
6502dd73 DJ |
10453 | void _initialize_dwarf2_read (void); |
10454 | ||
10455 | void | |
10456 | _initialize_dwarf2_read (void) | |
10457 | { | |
10458 | dwarf2_objfile_data_key = register_objfile_data (); | |
ae038cb0 | 10459 | |
1bedd215 AC |
10460 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
10461 | Set DWARF 2 specific variables.\n\ | |
10462 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
10463 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
10464 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
10465 | ||
1bedd215 AC |
10466 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
10467 | Show DWARF 2 specific variables\n\ | |
10468 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
10469 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
10470 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
10471 | ||
10472 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
10473 | &dwarf2_max_cache_age, _("\ |
10474 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
10475 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
10476 | A higher limit means that cached compilation units will be stored\n\ | |
10477 | in memory longer, and more total memory will be used. Zero disables\n\ | |
10478 | caching, which can slow down startup."), | |
2c5b56ce | 10479 | NULL, |
920d2a44 | 10480 | show_dwarf2_max_cache_age, |
2c5b56ce | 10481 | &set_dwarf2_cmdlist, |
ae038cb0 | 10482 | &show_dwarf2_cmdlist); |
6502dd73 | 10483 | } |