Commit | Line | Data |
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c906108c | 1 | /* Support routines for building symbol tables in GDB's internal format. |
e2882c85 | 2 | Copyright (C) 1986-2018 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 9 | (at your option) any later version. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b | 16 | You should have received a copy of the GNU General Public License |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
18 | |
19 | /* This module provides subroutines used for creating and adding to | |
20 | the symbol table. These routines are called from various symbol- | |
21 | file-reading routines. | |
22 | ||
23 | Routines to support specific debugging information formats (stabs, | |
0ab9ce85 DE |
24 | DWARF, etc) belong somewhere else. |
25 | ||
26 | The basic way this module is used is as follows: | |
27 | ||
28 | buildsym_init (); | |
33c7c59d | 29 | scoped_free_pendings free_pending; |
0ab9ce85 DE |
30 | cust = start_symtab (...); |
31 | ... read debug info ... | |
32 | cust = end_symtab (...); | |
0ab9ce85 DE |
33 | |
34 | The compunit symtab pointer ("cust") is returned from both start_symtab | |
35 | and end_symtab to simplify the debug info readers. | |
36 | ||
37 | There are minor variations on this, e.g., dwarf2read.c splits end_symtab | |
38 | into two calls: end_symtab_get_static_block, end_symtab_from_static_block, | |
39 | but all debug info readers follow this basic flow. | |
40 | ||
41 | Reading DWARF Type Units is another variation: | |
42 | ||
43 | buildsym_init (); | |
33c7c59d | 44 | scoped_free_pendings free_pending; |
0ab9ce85 DE |
45 | cust = start_symtab (...); |
46 | ... read debug info ... | |
47 | cust = end_expandable_symtab (...); | |
0ab9ce85 DE |
48 | |
49 | And then reading subsequent Type Units within the containing "Comp Unit" | |
50 | will use a second flow: | |
51 | ||
52 | buildsym_init (); | |
33c7c59d | 53 | scoped_free_pendings free_pending; |
0ab9ce85 DE |
54 | cust = restart_symtab (...); |
55 | ... read debug info ... | |
56 | cust = augment_type_symtab (...); | |
0ab9ce85 DE |
57 | |
58 | dbxread.c and xcoffread.c use another variation: | |
59 | ||
60 | buildsym_init (); | |
33c7c59d | 61 | scoped_free_pendings free_pending; |
0ab9ce85 DE |
62 | cust = start_symtab (...); |
63 | ... read debug info ... | |
64 | cust = end_symtab (...); | |
65 | ... start_symtab + read + end_symtab repeated ... | |
0ab9ce85 | 66 | */ |
c906108c SS |
67 | |
68 | #include "defs.h" | |
69 | #include "bfd.h" | |
04ea0df1 | 70 | #include "gdb_obstack.h" |
c906108c | 71 | #include "symtab.h" |
72367fb4 | 72 | #include "symfile.h" |
c906108c SS |
73 | #include "objfiles.h" |
74 | #include "gdbtypes.h" | |
75 | #include "complaints.h" | |
4a64f543 | 76 | #include "expression.h" /* For "enum exp_opcode" used by... */ |
357e46e7 | 77 | #include "bcache.h" |
4a64f543 | 78 | #include "filenames.h" /* For DOSish file names. */ |
99d9066e | 79 | #include "macrotab.h" |
261397f8 | 80 | #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */ |
fe898f56 | 81 | #include "block.h" |
9219021c | 82 | #include "cp-support.h" |
de4f826b | 83 | #include "dictionary.h" |
801e3a5b | 84 | #include "addrmap.h" |
b05628f0 | 85 | #include <algorithm> |
9219021c | 86 | |
c906108c | 87 | /* Ask buildsym.h to define the vars it normally declares `extern'. */ |
c5aa993b JM |
88 | #define EXTERN |
89 | /**/ | |
4a64f543 | 90 | #include "buildsym.h" /* Our own declarations. */ |
c906108c SS |
91 | #undef EXTERN |
92 | ||
0a0edcd5 | 93 | /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat |
c906108c SS |
94 | questionable--see comment where we call them). */ |
95 | ||
96 | #include "stabsread.h" | |
97 | ||
43f3e411 DE |
98 | /* Buildsym's counterpart to struct compunit_symtab. |
99 | TODO(dje): Move all related global state into here. */ | |
4d663531 | 100 | |
43f3e411 DE |
101 | struct buildsym_compunit |
102 | { | |
103 | /* The objfile we're reading debug info from. */ | |
104 | struct objfile *objfile; | |
105 | ||
106 | /* List of subfiles (source files). | |
107 | Files are added to the front of the list. | |
108 | This is important mostly for the language determination hacks we use, | |
109 | which iterate over previously added files. */ | |
110 | struct subfile *subfiles; | |
111 | ||
112 | /* The subfile of the main source file. */ | |
113 | struct subfile *main_subfile; | |
4d663531 | 114 | |
43f3e411 DE |
115 | /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */ |
116 | char *comp_dir; | |
4d663531 | 117 | |
43f3e411 DE |
118 | /* Space for this is not malloc'd, and is assumed to have at least |
119 | the same lifetime as objfile. */ | |
120 | const char *producer; | |
4d663531 | 121 | |
43f3e411 DE |
122 | /* Space for this is not malloc'd, and is assumed to have at least |
123 | the same lifetime as objfile. */ | |
124 | const char *debugformat; | |
94d09e04 | 125 | |
43f3e411 DE |
126 | /* The compunit we are building. */ |
127 | struct compunit_symtab *compunit_symtab; | |
5ffa0793 PA |
128 | |
129 | /* Language of this compunit_symtab. */ | |
130 | enum language language; | |
43f3e411 | 131 | }; |
94d09e04 | 132 | |
43f3e411 DE |
133 | /* The work-in-progress of the compunit we are building. |
134 | This is created first, before any subfiles by start_symtab. */ | |
7bab9b58 | 135 | |
43f3e411 | 136 | static struct buildsym_compunit *buildsym_compunit; |
7bab9b58 | 137 | |
c906108c SS |
138 | /* List of free `struct pending' structures for reuse. */ |
139 | ||
140 | static struct pending *free_pendings; | |
141 | ||
142 | /* Non-zero if symtab has line number info. This prevents an | |
143 | otherwise empty symtab from being tossed. */ | |
144 | ||
145 | static int have_line_numbers; | |
801e3a5b JB |
146 | |
147 | /* The mutable address map for the compilation unit whose symbols | |
148 | we're currently reading. The symtabs' shared blockvector will | |
149 | point to a fixed copy of this. */ | |
150 | static struct addrmap *pending_addrmap; | |
151 | ||
152 | /* The obstack on which we allocate pending_addrmap. | |
153 | If pending_addrmap is NULL, this is uninitialized; otherwise, it is | |
154 | initialized (and holds pending_addrmap). */ | |
155 | static struct obstack pending_addrmap_obstack; | |
156 | ||
157 | /* Non-zero if we recorded any ranges in the addrmap that are | |
158 | different from those in the blockvector already. We set this to | |
159 | zero when we start processing a symfile, and if it's still zero at | |
160 | the end, then we just toss the addrmap. */ | |
161 | static int pending_addrmap_interesting; | |
162 | ||
93eed41f TT |
163 | /* An obstack used for allocating pending blocks. */ |
164 | ||
165 | static struct obstack pending_block_obstack; | |
166 | ||
167 | /* List of blocks already made (lexical contexts already closed). | |
168 | This is used at the end to make the blockvector. */ | |
169 | ||
170 | struct pending_block | |
171 | { | |
172 | struct pending_block *next; | |
173 | struct block *block; | |
174 | }; | |
175 | ||
176 | /* Pointer to the head of a linked list of symbol blocks which have | |
177 | already been finalized (lexical contexts already closed) and which | |
178 | are just waiting to be built into a blockvector when finalizing the | |
179 | associated symtab. */ | |
180 | ||
181 | static struct pending_block *pending_blocks; | |
fc474241 DE |
182 | |
183 | struct subfile_stack | |
184 | { | |
185 | struct subfile_stack *next; | |
186 | char *name; | |
187 | }; | |
188 | ||
189 | static struct subfile_stack *subfile_stack; | |
190 | ||
191 | /* The macro table for the compilation unit whose symbols we're | |
43f3e411 | 192 | currently reading. */ |
fc474241 DE |
193 | static struct macro_table *pending_macros; |
194 | ||
0ab9ce85 DE |
195 | static void free_buildsym_compunit (void); |
196 | ||
c906108c | 197 | static int compare_line_numbers (const void *ln1p, const void *ln2p); |
0b49e518 TT |
198 | |
199 | static void record_pending_block (struct objfile *objfile, | |
200 | struct block *block, | |
201 | struct pending_block *opblock); | |
c906108c SS |
202 | |
203 | /* Initial sizes of data structures. These are realloc'd larger if | |
204 | needed, and realloc'd down to the size actually used, when | |
205 | completed. */ | |
206 | ||
207 | #define INITIAL_CONTEXT_STACK_SIZE 10 | |
208 | #define INITIAL_LINE_VECTOR_LENGTH 1000 | |
209 | \f | |
210 | ||
4a64f543 | 211 | /* Maintain the lists of symbols and blocks. */ |
c906108c | 212 | |
93bf33fd | 213 | /* Add a symbol to one of the lists of symbols. */ |
c906108c SS |
214 | |
215 | void | |
216 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
217 | { | |
52f0bd74 | 218 | struct pending *link; |
c906108c SS |
219 | |
220 | /* If this is an alias for another symbol, don't add it. */ | |
221 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') | |
222 | return; | |
223 | ||
4a64f543 | 224 | /* We keep PENDINGSIZE symbols in each link of the list. If we |
c906108c SS |
225 | don't have a link with room in it, add a new link. */ |
226 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) | |
227 | { | |
228 | if (free_pendings) | |
229 | { | |
230 | link = free_pendings; | |
231 | free_pendings = link->next; | |
232 | } | |
233 | else | |
234 | { | |
8d749320 | 235 | link = XNEW (struct pending); |
c906108c SS |
236 | } |
237 | ||
238 | link->next = *listhead; | |
239 | *listhead = link; | |
240 | link->nsyms = 0; | |
241 | } | |
242 | ||
243 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; | |
244 | } | |
245 | ||
246 | /* Find a symbol named NAME on a LIST. NAME need not be | |
247 | '\0'-terminated; LENGTH is the length of the name. */ | |
248 | ||
249 | struct symbol * | |
250 | find_symbol_in_list (struct pending *list, char *name, int length) | |
251 | { | |
252 | int j; | |
0d5cff50 | 253 | const char *pp; |
c906108c SS |
254 | |
255 | while (list != NULL) | |
256 | { | |
257 | for (j = list->nsyms; --j >= 0;) | |
258 | { | |
3567439c | 259 | pp = SYMBOL_LINKAGE_NAME (list->symbol[j]); |
5aafa1cc PM |
260 | if (*pp == *name && strncmp (pp, name, length) == 0 |
261 | && pp[length] == '\0') | |
c906108c SS |
262 | { |
263 | return (list->symbol[j]); | |
264 | } | |
265 | } | |
266 | list = list->next; | |
267 | } | |
268 | return (NULL); | |
269 | } | |
270 | ||
33c7c59d TT |
271 | /* At end of reading syms, or in case of quit, ensure everything |
272 | associated with building symtabs is freed. | |
0ab9ce85 DE |
273 | |
274 | N.B. This is *not* intended to be used when building psymtabs. Some debug | |
275 | info readers call this anyway, which is harmless if confusing. */ | |
c906108c | 276 | |
33c7c59d | 277 | scoped_free_pendings::~scoped_free_pendings () |
c906108c SS |
278 | { |
279 | struct pending *next, *next1; | |
280 | ||
281 | for (next = free_pendings; next; next = next1) | |
282 | { | |
283 | next1 = next->next; | |
b8c9b27d | 284 | xfree ((void *) next); |
c906108c SS |
285 | } |
286 | free_pendings = NULL; | |
287 | ||
288 | free_pending_blocks (); | |
289 | ||
290 | for (next = file_symbols; next != NULL; next = next1) | |
291 | { | |
292 | next1 = next->next; | |
b8c9b27d | 293 | xfree ((void *) next); |
c906108c SS |
294 | } |
295 | file_symbols = NULL; | |
296 | ||
297 | for (next = global_symbols; next != NULL; next = next1) | |
298 | { | |
299 | next1 = next->next; | |
b8c9b27d | 300 | xfree ((void *) next); |
c906108c SS |
301 | } |
302 | global_symbols = NULL; | |
99d9066e JB |
303 | |
304 | if (pending_macros) | |
305 | free_macro_table (pending_macros); | |
0ab9ce85 | 306 | pending_macros = NULL; |
801e3a5b JB |
307 | |
308 | if (pending_addrmap) | |
0ab9ce85 DE |
309 | obstack_free (&pending_addrmap_obstack, NULL); |
310 | pending_addrmap = NULL; | |
311 | ||
312 | free_buildsym_compunit (); | |
c906108c SS |
313 | } |
314 | ||
4a64f543 | 315 | /* This function is called to discard any pending blocks. */ |
c906108c SS |
316 | |
317 | void | |
318 | free_pending_blocks (void) | |
319 | { | |
93eed41f TT |
320 | if (pending_blocks != NULL) |
321 | { | |
322 | obstack_free (&pending_block_obstack, NULL); | |
323 | pending_blocks = NULL; | |
324 | } | |
c906108c SS |
325 | } |
326 | ||
327 | /* Take one of the lists of symbols and make a block from it. Keep | |
328 | the order the symbols have in the list (reversed from the input | |
329 | file). Put the block on the list of pending blocks. */ | |
330 | ||
84a146c9 | 331 | static struct block * |
63e43d3a PMR |
332 | finish_block_internal (struct symbol *symbol, |
333 | struct pending **listhead, | |
84a146c9 | 334 | struct pending_block *old_blocks, |
63e43d3a | 335 | const struct dynamic_prop *static_link, |
84a146c9 | 336 | CORE_ADDR start, CORE_ADDR end, |
6d30eef8 | 337 | int is_global, int expandable) |
c906108c | 338 | { |
43f3e411 | 339 | struct objfile *objfile = buildsym_compunit->objfile; |
5af949e3 | 340 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
52f0bd74 AC |
341 | struct pending *next, *next1; |
342 | struct block *block; | |
343 | struct pending_block *pblock; | |
c906108c | 344 | struct pending_block *opblock; |
c906108c | 345 | |
84a146c9 TT |
346 | block = (is_global |
347 | ? allocate_global_block (&objfile->objfile_obstack) | |
348 | : allocate_block (&objfile->objfile_obstack)); | |
c906108c | 349 | |
261397f8 DJ |
350 | if (symbol) |
351 | { | |
5ffa0793 PA |
352 | BLOCK_DICT (block) |
353 | = dict_create_linear (&objfile->objfile_obstack, | |
354 | buildsym_compunit->language, *listhead); | |
261397f8 DJ |
355 | } |
356 | else | |
c906108c | 357 | { |
6d30eef8 DE |
358 | if (expandable) |
359 | { | |
5ffa0793 PA |
360 | BLOCK_DICT (block) |
361 | = dict_create_hashed_expandable (buildsym_compunit->language); | |
6d30eef8 DE |
362 | dict_add_pending (BLOCK_DICT (block), *listhead); |
363 | } | |
364 | else | |
365 | { | |
366 | BLOCK_DICT (block) = | |
5ffa0793 PA |
367 | dict_create_hashed (&objfile->objfile_obstack, |
368 | buildsym_compunit->language, *listhead); | |
6d30eef8 | 369 | } |
c906108c SS |
370 | } |
371 | ||
372 | BLOCK_START (block) = start; | |
373 | BLOCK_END (block) = end; | |
c906108c | 374 | |
c906108c SS |
375 | /* Put the block in as the value of the symbol that names it. */ |
376 | ||
377 | if (symbol) | |
378 | { | |
379 | struct type *ftype = SYMBOL_TYPE (symbol); | |
de4f826b | 380 | struct dict_iterator iter; |
c906108c SS |
381 | SYMBOL_BLOCK_VALUE (symbol) = block; |
382 | BLOCK_FUNCTION (block) = symbol; | |
383 | ||
384 | if (TYPE_NFIELDS (ftype) <= 0) | |
385 | { | |
386 | /* No parameter type information is recorded with the | |
387 | function's type. Set that from the type of the | |
4a64f543 | 388 | parameter symbols. */ |
c906108c SS |
389 | int nparams = 0, iparams; |
390 | struct symbol *sym; | |
8157b174 TT |
391 | |
392 | /* Here we want to directly access the dictionary, because | |
393 | we haven't fully initialized the block yet. */ | |
394 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 395 | { |
2a2d4dc3 AS |
396 | if (SYMBOL_IS_ARGUMENT (sym)) |
397 | nparams++; | |
c906108c SS |
398 | } |
399 | if (nparams > 0) | |
400 | { | |
401 | TYPE_NFIELDS (ftype) = nparams; | |
402 | TYPE_FIELDS (ftype) = (struct field *) | |
403 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); | |
404 | ||
de4f826b | 405 | iparams = 0; |
8157b174 TT |
406 | /* Here we want to directly access the dictionary, because |
407 | we haven't fully initialized the block yet. */ | |
408 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 409 | { |
de4f826b DC |
410 | if (iparams == nparams) |
411 | break; | |
412 | ||
2a2d4dc3 | 413 | if (SYMBOL_IS_ARGUMENT (sym)) |
c906108c | 414 | { |
c906108c | 415 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
8176bb6d | 416 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
c906108c | 417 | iparams++; |
c906108c SS |
418 | } |
419 | } | |
420 | } | |
421 | } | |
422 | } | |
423 | else | |
424 | { | |
425 | BLOCK_FUNCTION (block) = NULL; | |
426 | } | |
427 | ||
63e43d3a PMR |
428 | if (static_link != NULL) |
429 | objfile_register_static_link (objfile, block, static_link); | |
430 | ||
c906108c SS |
431 | /* Now "free" the links of the list, and empty the list. */ |
432 | ||
433 | for (next = *listhead; next; next = next1) | |
434 | { | |
435 | next1 = next->next; | |
436 | next->next = free_pendings; | |
437 | free_pendings = next; | |
438 | } | |
439 | *listhead = NULL; | |
440 | ||
c906108c | 441 | /* Check to be sure that the blocks have an end address that is |
4a64f543 | 442 | greater than starting address. */ |
c906108c SS |
443 | |
444 | if (BLOCK_END (block) < BLOCK_START (block)) | |
445 | { | |
446 | if (symbol) | |
447 | { | |
b98664d3 | 448 | complaint (_("block end address less than block " |
3e43a32a | 449 | "start address in %s (patched it)"), |
de5ad195 | 450 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
451 | } |
452 | else | |
453 | { | |
b98664d3 | 454 | complaint (_("block end address %s less than block " |
3e43a32a | 455 | "start address %s (patched it)"), |
5af949e3 UW |
456 | paddress (gdbarch, BLOCK_END (block)), |
457 | paddress (gdbarch, BLOCK_START (block))); | |
c906108c | 458 | } |
4a64f543 | 459 | /* Better than nothing. */ |
c906108c SS |
460 | BLOCK_END (block) = BLOCK_START (block); |
461 | } | |
c906108c SS |
462 | |
463 | /* Install this block as the superblock of all blocks made since the | |
464 | start of this scope that don't have superblocks yet. */ | |
465 | ||
466 | opblock = NULL; | |
c0219d42 MS |
467 | for (pblock = pending_blocks; |
468 | pblock && pblock != old_blocks; | |
469 | pblock = pblock->next) | |
c906108c SS |
470 | { |
471 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) | |
472 | { | |
c906108c | 473 | /* Check to be sure the blocks are nested as we receive |
4a64f543 | 474 | them. If the compiler/assembler/linker work, this just |
14711c82 DJ |
475 | burns a small amount of time. |
476 | ||
477 | Skip blocks which correspond to a function; they're not | |
478 | physically nested inside this other blocks, only | |
479 | lexically nested. */ | |
480 | if (BLOCK_FUNCTION (pblock->block) == NULL | |
481 | && (BLOCK_START (pblock->block) < BLOCK_START (block) | |
482 | || BLOCK_END (pblock->block) > BLOCK_END (block))) | |
c906108c SS |
483 | { |
484 | if (symbol) | |
485 | { | |
b98664d3 | 486 | complaint (_("inner block not inside outer block in %s"), |
de5ad195 | 487 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
488 | } |
489 | else | |
490 | { | |
b98664d3 | 491 | complaint (_("inner block (%s-%s) not " |
3e43a32a | 492 | "inside outer block (%s-%s)"), |
5af949e3 UW |
493 | paddress (gdbarch, BLOCK_START (pblock->block)), |
494 | paddress (gdbarch, BLOCK_END (pblock->block)), | |
495 | paddress (gdbarch, BLOCK_START (block)), | |
496 | paddress (gdbarch, BLOCK_END (block))); | |
c906108c SS |
497 | } |
498 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) | |
499 | BLOCK_START (pblock->block) = BLOCK_START (block); | |
500 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) | |
501 | BLOCK_END (pblock->block) = BLOCK_END (block); | |
502 | } | |
c906108c SS |
503 | BLOCK_SUPERBLOCK (pblock->block) = block; |
504 | } | |
505 | opblock = pblock; | |
506 | } | |
507 | ||
22cee43f PMR |
508 | block_set_using (block, |
509 | (is_global | |
510 | ? global_using_directives | |
511 | : local_using_directives), | |
512 | &objfile->objfile_obstack); | |
513 | if (is_global) | |
514 | global_using_directives = NULL; | |
515 | else | |
516 | local_using_directives = NULL; | |
27aa8d6a | 517 | |
c906108c | 518 | record_pending_block (objfile, block, opblock); |
801e3a5b JB |
519 | |
520 | return block; | |
c906108c SS |
521 | } |
522 | ||
84a146c9 | 523 | struct block * |
63e43d3a PMR |
524 | finish_block (struct symbol *symbol, |
525 | struct pending **listhead, | |
84a146c9 | 526 | struct pending_block *old_blocks, |
63e43d3a | 527 | const struct dynamic_prop *static_link, |
4d663531 | 528 | CORE_ADDR start, CORE_ADDR end) |
84a146c9 | 529 | { |
63e43d3a | 530 | return finish_block_internal (symbol, listhead, old_blocks, static_link, |
4d663531 | 531 | start, end, 0, 0); |
84a146c9 | 532 | } |
de4f826b | 533 | |
c906108c SS |
534 | /* Record BLOCK on the list of all blocks in the file. Put it after |
535 | OPBLOCK, or at the beginning if opblock is NULL. This puts the | |
536 | block in the list after all its subblocks. | |
537 | ||
4a146b47 | 538 | Allocate the pending block struct in the objfile_obstack to save |
c906108c SS |
539 | time. This wastes a little space. FIXME: Is it worth it? */ |
540 | ||
0b49e518 | 541 | static void |
c906108c SS |
542 | record_pending_block (struct objfile *objfile, struct block *block, |
543 | struct pending_block *opblock) | |
544 | { | |
52f0bd74 | 545 | struct pending_block *pblock; |
c906108c | 546 | |
93eed41f TT |
547 | if (pending_blocks == NULL) |
548 | obstack_init (&pending_block_obstack); | |
549 | ||
8d749320 | 550 | pblock = XOBNEW (&pending_block_obstack, struct pending_block); |
c906108c SS |
551 | pblock->block = block; |
552 | if (opblock) | |
553 | { | |
554 | pblock->next = opblock->next; | |
555 | opblock->next = pblock; | |
556 | } | |
557 | else | |
558 | { | |
559 | pblock->next = pending_blocks; | |
560 | pending_blocks = pblock; | |
561 | } | |
562 | } | |
563 | ||
801e3a5b JB |
564 | |
565 | /* Record that the range of addresses from START to END_INCLUSIVE | |
566 | (inclusive, like it says) belongs to BLOCK. BLOCK's start and end | |
567 | addresses must be set already. You must apply this function to all | |
568 | BLOCK's children before applying it to BLOCK. | |
569 | ||
570 | If a call to this function complicates the picture beyond that | |
571 | already provided by BLOCK_START and BLOCK_END, then we create an | |
572 | address map for the block. */ | |
573 | void | |
574 | record_block_range (struct block *block, | |
575 | CORE_ADDR start, CORE_ADDR end_inclusive) | |
576 | { | |
577 | /* If this is any different from the range recorded in the block's | |
578 | own BLOCK_START and BLOCK_END, then note that the address map has | |
579 | become interesting. Note that even if this block doesn't have | |
580 | any "interesting" ranges, some later block might, so we still | |
581 | need to record this block in the addrmap. */ | |
582 | if (start != BLOCK_START (block) | |
583 | || end_inclusive + 1 != BLOCK_END (block)) | |
584 | pending_addrmap_interesting = 1; | |
585 | ||
586 | if (! pending_addrmap) | |
587 | { | |
588 | obstack_init (&pending_addrmap_obstack); | |
589 | pending_addrmap = addrmap_create_mutable (&pending_addrmap_obstack); | |
590 | } | |
591 | ||
592 | addrmap_set_empty (pending_addrmap, start, end_inclusive, block); | |
593 | } | |
594 | ||
822e978b | 595 | static struct blockvector * |
43f3e411 | 596 | make_blockvector (void) |
c906108c | 597 | { |
43f3e411 | 598 | struct objfile *objfile = buildsym_compunit->objfile; |
52f0bd74 AC |
599 | struct pending_block *next; |
600 | struct blockvector *blockvector; | |
601 | int i; | |
c906108c SS |
602 | |
603 | /* Count the length of the list of blocks. */ | |
604 | ||
605 | for (next = pending_blocks, i = 0; next; next = next->next, i++) | |
606 | {; | |
607 | } | |
608 | ||
609 | blockvector = (struct blockvector *) | |
4a146b47 | 610 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
611 | (sizeof (struct blockvector) |
612 | + (i - 1) * sizeof (struct block *))); | |
613 | ||
4a64f543 | 614 | /* Copy the blocks into the blockvector. This is done in reverse |
c906108c | 615 | order, which happens to put the blocks into the proper order |
4a64f543 | 616 | (ascending starting address). finish_block has hair to insert |
c906108c SS |
617 | each block into the list after its subblocks in order to make |
618 | sure this is true. */ | |
619 | ||
620 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
621 | for (next = pending_blocks; next; next = next->next) | |
622 | { | |
623 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
624 | } | |
625 | ||
89ba75b1 | 626 | free_pending_blocks (); |
c906108c | 627 | |
801e3a5b JB |
628 | /* If we needed an address map for this symtab, record it in the |
629 | blockvector. */ | |
630 | if (pending_addrmap && pending_addrmap_interesting) | |
631 | BLOCKVECTOR_MAP (blockvector) | |
632 | = addrmap_create_fixed (pending_addrmap, &objfile->objfile_obstack); | |
633 | else | |
634 | BLOCKVECTOR_MAP (blockvector) = 0; | |
4aad0dfc | 635 | |
c906108c | 636 | /* Some compilers output blocks in the wrong order, but we depend on |
4a64f543 | 637 | their being in the right order so we can binary search. Check the |
4aad0dfc DE |
638 | order and moan about it. |
639 | Note: Remember that the first two blocks are the global and static | |
640 | blocks. We could special case that fact and begin checking at block 2. | |
641 | To avoid making that assumption we do not. */ | |
c906108c SS |
642 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) |
643 | { | |
644 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) | |
645 | { | |
646 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) | |
647 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) | |
648 | { | |
59527da0 JB |
649 | CORE_ADDR start |
650 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); | |
c906108c | 651 | |
b98664d3 | 652 | complaint (_("block at %s out of order"), |
bb599908 | 653 | hex_string ((LONGEST) start)); |
c906108c SS |
654 | } |
655 | } | |
656 | } | |
c906108c SS |
657 | |
658 | return (blockvector); | |
659 | } | |
660 | \f | |
661 | /* Start recording information about source code that came from an | |
662 | included (or otherwise merged-in) source file with a different | |
4d663531 | 663 | name. NAME is the name of the file (cannot be NULL). */ |
c906108c SS |
664 | |
665 | void | |
4d663531 | 666 | start_subfile (const char *name) |
c906108c | 667 | { |
43f3e411 | 668 | const char *subfile_dirname; |
52f0bd74 | 669 | struct subfile *subfile; |
c906108c | 670 | |
43f3e411 DE |
671 | gdb_assert (buildsym_compunit != NULL); |
672 | ||
673 | subfile_dirname = buildsym_compunit->comp_dir; | |
c906108c | 674 | |
43f3e411 DE |
675 | /* See if this subfile is already registered. */ |
676 | ||
677 | for (subfile = buildsym_compunit->subfiles; subfile; subfile = subfile->next) | |
c906108c | 678 | { |
84ba0adf DJ |
679 | char *subfile_name; |
680 | ||
681 | /* If NAME is an absolute path, and this subfile is not, then | |
682 | attempt to create an absolute path to compare. */ | |
683 | if (IS_ABSOLUTE_PATH (name) | |
684 | && !IS_ABSOLUTE_PATH (subfile->name) | |
43f3e411 DE |
685 | && subfile_dirname != NULL) |
686 | subfile_name = concat (subfile_dirname, SLASH_STRING, | |
6eb7ee03 | 687 | subfile->name, (char *) NULL); |
84ba0adf DJ |
688 | else |
689 | subfile_name = subfile->name; | |
690 | ||
691 | if (FILENAME_CMP (subfile_name, name) == 0) | |
c906108c SS |
692 | { |
693 | current_subfile = subfile; | |
84ba0adf DJ |
694 | if (subfile_name != subfile->name) |
695 | xfree (subfile_name); | |
c906108c SS |
696 | return; |
697 | } | |
84ba0adf DJ |
698 | if (subfile_name != subfile->name) |
699 | xfree (subfile_name); | |
c906108c SS |
700 | } |
701 | ||
43f3e411 | 702 | /* This subfile is not known. Add an entry for it. */ |
c906108c | 703 | |
8d749320 | 704 | subfile = XNEW (struct subfile); |
43f3e411 DE |
705 | memset (subfile, 0, sizeof (struct subfile)); |
706 | subfile->buildsym_compunit = buildsym_compunit; | |
707 | ||
708 | subfile->next = buildsym_compunit->subfiles; | |
709 | buildsym_compunit->subfiles = subfile; | |
710 | ||
c906108c SS |
711 | current_subfile = subfile; |
712 | ||
b74db436 | 713 | subfile->name = xstrdup (name); |
c906108c SS |
714 | |
715 | /* Initialize line-number recording for this subfile. */ | |
716 | subfile->line_vector = NULL; | |
717 | ||
718 | /* Default the source language to whatever can be deduced from the | |
719 | filename. If nothing can be deduced (such as for a C/C++ include | |
720 | file with a ".h" extension), then inherit whatever language the | |
721 | previous subfile had. This kludgery is necessary because there | |
722 | is no standard way in some object formats to record the source | |
723 | language. Also, when symtabs are allocated we try to deduce a | |
724 | language then as well, but it is too late for us to use that | |
725 | information while reading symbols, since symtabs aren't allocated | |
726 | until after all the symbols have been processed for a given | |
4a64f543 | 727 | source file. */ |
c906108c SS |
728 | |
729 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
730 | if (subfile->language == language_unknown |
731 | && subfile->next != NULL) | |
c906108c SS |
732 | { |
733 | subfile->language = subfile->next->language; | |
734 | } | |
735 | ||
25caa7a8 | 736 | /* If the filename of this subfile ends in .C, then change the |
c906108c | 737 | language of any pending subfiles from C to C++. We also accept |
25caa7a8 | 738 | any other C++ suffixes accepted by deduce_language_from_filename. */ |
c906108c SS |
739 | /* Likewise for f2c. */ |
740 | ||
741 | if (subfile->name) | |
742 | { | |
743 | struct subfile *s; | |
744 | enum language sublang = deduce_language_from_filename (subfile->name); | |
745 | ||
746 | if (sublang == language_cplus || sublang == language_fortran) | |
43f3e411 | 747 | for (s = buildsym_compunit->subfiles; s != NULL; s = s->next) |
c906108c SS |
748 | if (s->language == language_c) |
749 | s->language = sublang; | |
750 | } | |
751 | ||
752 | /* And patch up this file if necessary. */ | |
753 | if (subfile->language == language_c | |
754 | && subfile->next != NULL | |
755 | && (subfile->next->language == language_cplus | |
756 | || subfile->next->language == language_fortran)) | |
757 | { | |
758 | subfile->language = subfile->next->language; | |
759 | } | |
760 | } | |
761 | ||
43f3e411 DE |
762 | /* Start recording information about a primary source file (IOW, not an |
763 | included source file). | |
764 | COMP_DIR is the directory in which the compilation unit was compiled | |
765 | (or NULL if not known). */ | |
766 | ||
767 | static struct buildsym_compunit * | |
5ffa0793 PA |
768 | start_buildsym_compunit (struct objfile *objfile, const char *comp_dir, |
769 | enum language language) | |
43f3e411 DE |
770 | { |
771 | struct buildsym_compunit *bscu; | |
772 | ||
8d749320 | 773 | bscu = XNEW (struct buildsym_compunit); |
43f3e411 DE |
774 | memset (bscu, 0, sizeof (struct buildsym_compunit)); |
775 | ||
776 | bscu->objfile = objfile; | |
777 | bscu->comp_dir = (comp_dir == NULL) ? NULL : xstrdup (comp_dir); | |
5ffa0793 | 778 | bscu->language = language; |
43f3e411 DE |
779 | |
780 | /* Initialize the debug format string to NULL. We may supply it | |
781 | later via a call to record_debugformat. */ | |
782 | bscu->debugformat = NULL; | |
783 | ||
784 | /* Similarly for the producer. */ | |
785 | bscu->producer = NULL; | |
786 | ||
787 | return bscu; | |
788 | } | |
789 | ||
790 | /* Delete the buildsym compunit. */ | |
7bab9b58 DE |
791 | |
792 | static void | |
43f3e411 | 793 | free_buildsym_compunit (void) |
7bab9b58 DE |
794 | { |
795 | struct subfile *subfile, *nextsub; | |
796 | ||
43f3e411 DE |
797 | if (buildsym_compunit == NULL) |
798 | return; | |
799 | for (subfile = buildsym_compunit->subfiles; | |
800 | subfile != NULL; | |
801 | subfile = nextsub) | |
7bab9b58 DE |
802 | { |
803 | nextsub = subfile->next; | |
804 | xfree (subfile->name); | |
7bab9b58 DE |
805 | xfree (subfile->line_vector); |
806 | xfree (subfile); | |
807 | } | |
43f3e411 DE |
808 | xfree (buildsym_compunit->comp_dir); |
809 | xfree (buildsym_compunit); | |
810 | buildsym_compunit = NULL; | |
0ab9ce85 | 811 | current_subfile = NULL; |
7bab9b58 DE |
812 | } |
813 | ||
c906108c SS |
814 | /* For stabs readers, the first N_SO symbol is assumed to be the |
815 | source file name, and the subfile struct is initialized using that | |
816 | assumption. If another N_SO symbol is later seen, immediately | |
817 | following the first one, then the first one is assumed to be the | |
818 | directory name and the second one is really the source file name. | |
819 | ||
820 | So we have to patch up the subfile struct by moving the old name | |
821 | value to dirname and remembering the new name. Some sanity | |
822 | checking is performed to ensure that the state of the subfile | |
823 | struct is reasonable and that the old name we are assuming to be a | |
4a64f543 | 824 | directory name actually is (by checking for a trailing '/'). */ |
c906108c SS |
825 | |
826 | void | |
a121b7c1 | 827 | patch_subfile_names (struct subfile *subfile, const char *name) |
c906108c | 828 | { |
43f3e411 DE |
829 | if (subfile != NULL |
830 | && buildsym_compunit->comp_dir == NULL | |
831 | && subfile->name != NULL | |
0ba1096a | 832 | && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1])) |
c906108c | 833 | { |
43f3e411 | 834 | buildsym_compunit->comp_dir = subfile->name; |
1b36a34b | 835 | subfile->name = xstrdup (name); |
46212e0b | 836 | set_last_source_file (name); |
c906108c SS |
837 | |
838 | /* Default the source language to whatever can be deduced from | |
839 | the filename. If nothing can be deduced (such as for a C/C++ | |
840 | include file with a ".h" extension), then inherit whatever | |
841 | language the previous subfile had. This kludgery is | |
842 | necessary because there is no standard way in some object | |
843 | formats to record the source language. Also, when symtabs | |
844 | are allocated we try to deduce a language then as well, but | |
845 | it is too late for us to use that information while reading | |
846 | symbols, since symtabs aren't allocated until after all the | |
4a64f543 | 847 | symbols have been processed for a given source file. */ |
c906108c SS |
848 | |
849 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
850 | if (subfile->language == language_unknown |
851 | && subfile->next != NULL) | |
c906108c SS |
852 | { |
853 | subfile->language = subfile->next->language; | |
854 | } | |
855 | } | |
856 | } | |
857 | \f | |
858 | /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for | |
859 | switching source files (different subfiles, as we call them) within | |
860 | one object file, but using a stack rather than in an arbitrary | |
861 | order. */ | |
862 | ||
863 | void | |
864 | push_subfile (void) | |
865 | { | |
8d749320 | 866 | struct subfile_stack *tem = XNEW (struct subfile_stack); |
c906108c SS |
867 | |
868 | tem->next = subfile_stack; | |
869 | subfile_stack = tem; | |
870 | if (current_subfile == NULL || current_subfile->name == NULL) | |
871 | { | |
4a64f543 MS |
872 | internal_error (__FILE__, __LINE__, |
873 | _("failed internal consistency check")); | |
c906108c SS |
874 | } |
875 | tem->name = current_subfile->name; | |
876 | } | |
877 | ||
878 | char * | |
879 | pop_subfile (void) | |
880 | { | |
52f0bd74 AC |
881 | char *name; |
882 | struct subfile_stack *link = subfile_stack; | |
c906108c SS |
883 | |
884 | if (link == NULL) | |
885 | { | |
3e43a32a MS |
886 | internal_error (__FILE__, __LINE__, |
887 | _("failed internal consistency check")); | |
c906108c SS |
888 | } |
889 | name = link->name; | |
890 | subfile_stack = link->next; | |
b8c9b27d | 891 | xfree ((void *) link); |
c906108c SS |
892 | return (name); |
893 | } | |
894 | \f | |
895 | /* Add a linetable entry for line number LINE and address PC to the | |
896 | line vector for SUBFILE. */ | |
897 | ||
898 | void | |
aa1ee363 | 899 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
c906108c SS |
900 | { |
901 | struct linetable_entry *e; | |
c906108c | 902 | |
cc59ec59 | 903 | /* Ignore the dummy line number in libg.o */ |
c906108c SS |
904 | if (line == 0xffff) |
905 | { | |
906 | return; | |
907 | } | |
908 | ||
909 | /* Make sure line vector exists and is big enough. */ | |
910 | if (!subfile->line_vector) | |
911 | { | |
912 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; | |
913 | subfile->line_vector = (struct linetable *) | |
914 | xmalloc (sizeof (struct linetable) | |
c5aa993b | 915 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
c906108c SS |
916 | subfile->line_vector->nitems = 0; |
917 | have_line_numbers = 1; | |
918 | } | |
919 | ||
920 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) | |
921 | { | |
922 | subfile->line_vector_length *= 2; | |
923 | subfile->line_vector = (struct linetable *) | |
924 | xrealloc ((char *) subfile->line_vector, | |
925 | (sizeof (struct linetable) | |
926 | + (subfile->line_vector_length | |
927 | * sizeof (struct linetable_entry)))); | |
928 | } | |
929 | ||
607ae575 DJ |
930 | /* Normally, we treat lines as unsorted. But the end of sequence |
931 | marker is special. We sort line markers at the same PC by line | |
932 | number, so end of sequence markers (which have line == 0) appear | |
933 | first. This is right if the marker ends the previous function, | |
934 | and there is no padding before the next function. But it is | |
935 | wrong if the previous line was empty and we are now marking a | |
936 | switch to a different subfile. We must leave the end of sequence | |
937 | marker at the end of this group of lines, not sort the empty line | |
938 | to after the marker. The easiest way to accomplish this is to | |
939 | delete any empty lines from our table, if they are followed by | |
940 | end of sequence markers. All we lose is the ability to set | |
941 | breakpoints at some lines which contain no instructions | |
942 | anyway. */ | |
943 | if (line == 0 && subfile->line_vector->nitems > 0) | |
944 | { | |
945 | e = subfile->line_vector->item + subfile->line_vector->nitems - 1; | |
946 | while (subfile->line_vector->nitems > 0 && e->pc == pc) | |
947 | { | |
948 | e--; | |
949 | subfile->line_vector->nitems--; | |
950 | } | |
951 | } | |
952 | ||
c906108c SS |
953 | e = subfile->line_vector->item + subfile->line_vector->nitems++; |
954 | e->line = line; | |
607ae575 | 955 | e->pc = pc; |
c906108c SS |
956 | } |
957 | ||
958 | /* Needed in order to sort line tables from IBM xcoff files. Sigh! */ | |
959 | ||
960 | static int | |
961 | compare_line_numbers (const void *ln1p, const void *ln2p) | |
962 | { | |
963 | struct linetable_entry *ln1 = (struct linetable_entry *) ln1p; | |
964 | struct linetable_entry *ln2 = (struct linetable_entry *) ln2p; | |
965 | ||
966 | /* Note: this code does not assume that CORE_ADDRs can fit in ints. | |
967 | Please keep it that way. */ | |
968 | if (ln1->pc < ln2->pc) | |
969 | return -1; | |
970 | ||
971 | if (ln1->pc > ln2->pc) | |
972 | return 1; | |
973 | ||
974 | /* If pc equal, sort by line. I'm not sure whether this is optimum | |
975 | behavior (see comment at struct linetable in symtab.h). */ | |
976 | return ln1->line - ln2->line; | |
977 | } | |
978 | \f | |
43f3e411 DE |
979 | /* See buildsym.h. */ |
980 | ||
981 | struct compunit_symtab * | |
982 | buildsym_compunit_symtab (void) | |
983 | { | |
984 | gdb_assert (buildsym_compunit != NULL); | |
985 | ||
986 | return buildsym_compunit->compunit_symtab; | |
987 | } | |
988 | ||
989 | /* See buildsym.h. */ | |
fc474241 DE |
990 | |
991 | struct macro_table * | |
43f3e411 | 992 | get_macro_table (void) |
fc474241 | 993 | { |
43f3e411 DE |
994 | struct objfile *objfile; |
995 | ||
996 | gdb_assert (buildsym_compunit != NULL); | |
997 | ||
998 | objfile = buildsym_compunit->objfile; | |
4d663531 | 999 | |
fc474241 | 1000 | if (! pending_macros) |
43f3e411 DE |
1001 | { |
1002 | pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, | |
1003 | objfile->per_bfd->macro_cache, | |
1004 | buildsym_compunit->compunit_symtab); | |
1005 | } | |
1006 | ||
fc474241 DE |
1007 | return pending_macros; |
1008 | } | |
1009 | \f | |
0ab9ce85 DE |
1010 | /* Init state to prepare for building a symtab. |
1011 | Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c | |
1012 | can call start_symtab+end_symtab multiple times after one call to | |
1013 | buildsym_init. */ | |
1014 | ||
1015 | static void | |
1016 | prepare_for_building (const char *name, CORE_ADDR start_addr) | |
1017 | { | |
1018 | set_last_source_file (name); | |
1019 | last_source_start_addr = start_addr; | |
1020 | ||
1021 | local_symbols = NULL; | |
22cee43f | 1022 | local_using_directives = NULL; |
0ab9ce85 DE |
1023 | within_function = 0; |
1024 | have_line_numbers = 0; | |
1025 | ||
1026 | context_stack_depth = 0; | |
1027 | ||
1028 | /* These should have been reset either by successful completion of building | |
33c7c59d | 1029 | a symtab, or by the scoped_free_pendings destructor. */ |
0ab9ce85 DE |
1030 | gdb_assert (file_symbols == NULL); |
1031 | gdb_assert (global_symbols == NULL); | |
22cee43f | 1032 | gdb_assert (global_using_directives == NULL); |
0ab9ce85 DE |
1033 | gdb_assert (pending_macros == NULL); |
1034 | gdb_assert (pending_addrmap == NULL); | |
1035 | gdb_assert (current_subfile == NULL); | |
1036 | } | |
1037 | ||
4d663531 | 1038 | /* Start a new symtab for a new source file in OBJFILE. Called, for example, |
c906108c SS |
1039 | when a stabs symbol of type N_SO is seen, or when a DWARF |
1040 | TAG_compile_unit DIE is seen. It indicates the start of data for | |
0b0287a1 DE |
1041 | one original source file. |
1042 | ||
5ffa0793 PA |
1043 | NAME is the name of the file (cannot be NULL). COMP_DIR is the |
1044 | directory in which the file was compiled (or NULL if not known). | |
1045 | START_ADDR is the lowest address of objects in the file (or 0 if | |
1046 | not known). LANGUAGE is the language of the source file, or | |
1047 | language_unknown if not known, in which case it'll be deduced from | |
1048 | the filename. */ | |
c906108c | 1049 | |
43f3e411 | 1050 | struct compunit_symtab * |
4d663531 | 1051 | start_symtab (struct objfile *objfile, const char *name, const char *comp_dir, |
5ffa0793 | 1052 | CORE_ADDR start_addr, enum language language) |
c906108c | 1053 | { |
0ab9ce85 | 1054 | prepare_for_building (name, start_addr); |
43f3e411 | 1055 | |
5ffa0793 | 1056 | buildsym_compunit = start_buildsym_compunit (objfile, comp_dir, language); |
43f3e411 | 1057 | |
0ab9ce85 | 1058 | /* Allocate the compunit symtab now. The caller needs it to allocate |
43f3e411 DE |
1059 | non-primary symtabs. It is also needed by get_macro_table. */ |
1060 | buildsym_compunit->compunit_symtab = allocate_compunit_symtab (objfile, | |
1061 | name); | |
1062 | ||
1063 | /* Build the subfile for NAME (the main source file) so that we can record | |
1064 | a pointer to it for later. | |
1065 | IMPORTANT: Do not allocate a struct symtab for NAME here. | |
1066 | It can happen that the debug info provides a different path to NAME than | |
1067 | DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but | |
1068 | that only works if the main_subfile doesn't have a symtab yet. */ | |
4d663531 | 1069 | start_subfile (name); |
7bab9b58 DE |
1070 | /* Save this so that we don't have to go looking for it at the end |
1071 | of the subfiles list. */ | |
43f3e411 DE |
1072 | buildsym_compunit->main_subfile = current_subfile; |
1073 | ||
43f3e411 | 1074 | return buildsym_compunit->compunit_symtab; |
6d30eef8 DE |
1075 | } |
1076 | ||
1077 | /* Restart compilation for a symtab. | |
0ab9ce85 DE |
1078 | CUST is the result of end_expandable_symtab. |
1079 | NAME, START_ADDR are the source file we are resuming with. | |
1080 | ||
6d30eef8 | 1081 | This is used when a symtab is built from multiple sources. |
0ab9ce85 DE |
1082 | The symtab is first built with start_symtab/end_expandable_symtab |
1083 | and then for each additional piece call restart_symtab/augment_*_symtab. | |
1084 | Note: At the moment there is only augment_type_symtab. */ | |
6d30eef8 DE |
1085 | |
1086 | void | |
0ab9ce85 DE |
1087 | restart_symtab (struct compunit_symtab *cust, |
1088 | const char *name, CORE_ADDR start_addr) | |
6d30eef8 | 1089 | { |
0ab9ce85 | 1090 | prepare_for_building (name, start_addr); |
c906108c | 1091 | |
0ab9ce85 | 1092 | buildsym_compunit = start_buildsym_compunit (COMPUNIT_OBJFILE (cust), |
5ffa0793 PA |
1093 | COMPUNIT_DIRNAME (cust), |
1094 | compunit_language (cust)); | |
0ab9ce85 | 1095 | buildsym_compunit->compunit_symtab = cust; |
c906108c SS |
1096 | } |
1097 | ||
4a64f543 MS |
1098 | /* Subroutine of end_symtab to simplify it. Look for a subfile that |
1099 | matches the main source file's basename. If there is only one, and | |
1100 | if the main source file doesn't have any symbol or line number | |
1101 | information, then copy this file's symtab and line_vector to the | |
1102 | main source file's subfile and discard the other subfile. This can | |
1103 | happen because of a compiler bug or from the user playing games | |
1104 | with #line or from things like a distributed build system that | |
43f3e411 DE |
1105 | manipulates the debug info. This can also happen from an innocent |
1106 | symlink in the paths, we don't canonicalize paths here. */ | |
4584e32e DE |
1107 | |
1108 | static void | |
1109 | watch_main_source_file_lossage (void) | |
1110 | { | |
43f3e411 | 1111 | struct subfile *mainsub, *subfile; |
4584e32e | 1112 | |
43f3e411 | 1113 | /* We have to watch for buildsym_compunit == NULL here. It's a quirk of |
7bab9b58 | 1114 | end_symtab, it can return NULL so there may not be a main subfile. */ |
43f3e411 | 1115 | if (buildsym_compunit == NULL) |
7bab9b58 | 1116 | return; |
4584e32e | 1117 | |
43f3e411 DE |
1118 | /* Get the main source file. */ |
1119 | mainsub = buildsym_compunit->main_subfile; | |
1120 | ||
4a64f543 | 1121 | /* If the main source file doesn't have any line number or symbol |
7bab9b58 | 1122 | info, look for an alias in another subfile. */ |
4584e32e | 1123 | |
43f3e411 DE |
1124 | if (mainsub->line_vector == NULL |
1125 | && mainsub->symtab == NULL) | |
4584e32e | 1126 | { |
43f3e411 | 1127 | const char *mainbase = lbasename (mainsub->name); |
4584e32e DE |
1128 | int nr_matches = 0; |
1129 | struct subfile *prevsub; | |
1130 | struct subfile *mainsub_alias = NULL; | |
1131 | struct subfile *prev_mainsub_alias = NULL; | |
1132 | ||
1133 | prevsub = NULL; | |
43f3e411 DE |
1134 | for (subfile = buildsym_compunit->subfiles; |
1135 | subfile != NULL; | |
4584e32e DE |
1136 | subfile = subfile->next) |
1137 | { | |
43f3e411 DE |
1138 | if (subfile == mainsub) |
1139 | continue; | |
0ba1096a | 1140 | if (filename_cmp (lbasename (subfile->name), mainbase) == 0) |
4584e32e DE |
1141 | { |
1142 | ++nr_matches; | |
1143 | mainsub_alias = subfile; | |
1144 | prev_mainsub_alias = prevsub; | |
1145 | } | |
1146 | prevsub = subfile; | |
1147 | } | |
1148 | ||
1149 | if (nr_matches == 1) | |
1150 | { | |
43f3e411 | 1151 | gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub); |
4584e32e DE |
1152 | |
1153 | /* Found a match for the main source file. | |
1154 | Copy its line_vector and symtab to the main subfile | |
1155 | and then discard it. */ | |
1156 | ||
43f3e411 DE |
1157 | mainsub->line_vector = mainsub_alias->line_vector; |
1158 | mainsub->line_vector_length = mainsub_alias->line_vector_length; | |
1159 | mainsub->symtab = mainsub_alias->symtab; | |
4584e32e DE |
1160 | |
1161 | if (prev_mainsub_alias == NULL) | |
43f3e411 | 1162 | buildsym_compunit->subfiles = mainsub_alias->next; |
4584e32e DE |
1163 | else |
1164 | prev_mainsub_alias->next = mainsub_alias->next; | |
98387a29 | 1165 | xfree (mainsub_alias->name); |
4584e32e DE |
1166 | xfree (mainsub_alias); |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | ||
0ab9ce85 DE |
1171 | /* Reset state after a successful building of a symtab. |
1172 | This exists because dbxread.c and xcoffread.c can call | |
1173 | start_symtab+end_symtab multiple times after one call to buildsym_init, | |
33c7c59d | 1174 | and before the scoped_free_pendings destructor is called. |
0ab9ce85 | 1175 | We keep the free_pendings list around for dbx/xcoff sake. */ |
6d30eef8 DE |
1176 | |
1177 | static void | |
1178 | reset_symtab_globals (void) | |
1179 | { | |
46212e0b | 1180 | set_last_source_file (NULL); |
0ab9ce85 DE |
1181 | |
1182 | local_symbols = NULL; | |
22cee43f | 1183 | local_using_directives = NULL; |
0ab9ce85 DE |
1184 | file_symbols = NULL; |
1185 | global_symbols = NULL; | |
22cee43f | 1186 | global_using_directives = NULL; |
0ab9ce85 DE |
1187 | |
1188 | /* We don't free pending_macros here because if the symtab was successfully | |
1189 | built then ownership was transferred to the symtab. */ | |
6d30eef8 | 1190 | pending_macros = NULL; |
0ab9ce85 | 1191 | |
6d30eef8 | 1192 | if (pending_addrmap) |
0ab9ce85 DE |
1193 | obstack_free (&pending_addrmap_obstack, NULL); |
1194 | pending_addrmap = NULL; | |
1195 | ||
1196 | free_buildsym_compunit (); | |
6d30eef8 DE |
1197 | } |
1198 | ||
4359dff1 JK |
1199 | /* Implementation of the first part of end_symtab. It allows modifying |
1200 | STATIC_BLOCK before it gets finalized by end_symtab_from_static_block. | |
1201 | If the returned value is NULL there is no blockvector created for | |
1202 | this symtab (you still must call end_symtab_from_static_block). | |
c906108c | 1203 | |
4359dff1 JK |
1204 | END_ADDR is the same as for end_symtab: the address of the end of the |
1205 | file's text. | |
c906108c | 1206 | |
4359dff1 | 1207 | If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made |
36586728 TT |
1208 | expandable. |
1209 | ||
1210 | If REQUIRED is non-zero, then a symtab is created even if it does | |
1211 | not contain any symbols. */ | |
6d30eef8 | 1212 | |
4359dff1 | 1213 | struct block * |
4d663531 | 1214 | end_symtab_get_static_block (CORE_ADDR end_addr, int expandable, int required) |
c906108c | 1215 | { |
43f3e411 | 1216 | struct objfile *objfile = buildsym_compunit->objfile; |
4d663531 | 1217 | |
c906108c SS |
1218 | /* Finish the lexical context of the last function in the file; pop |
1219 | the context stack. */ | |
1220 | ||
1221 | if (context_stack_depth > 0) | |
1222 | { | |
4359dff1 JK |
1223 | struct context_stack *cstk = pop_context (); |
1224 | ||
c906108c | 1225 | /* Make a block for the local symbols within. */ |
63e43d3a | 1226 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, NULL, |
4d663531 | 1227 | cstk->start_addr, end_addr); |
c906108c SS |
1228 | |
1229 | if (context_stack_depth > 0) | |
1230 | { | |
1231 | /* This is said to happen with SCO. The old coffread.c | |
1232 | code simply emptied the context stack, so we do the | |
1233 | same. FIXME: Find out why it is happening. This is not | |
1234 | believed to happen in most cases (even for coffread.c); | |
1235 | it used to be an abort(). */ | |
b98664d3 | 1236 | complaint (_("Context stack not empty in end_symtab")); |
c906108c SS |
1237 | context_stack_depth = 0; |
1238 | } | |
1239 | } | |
1240 | ||
1241 | /* Reordered executables may have out of order pending blocks; if | |
1242 | OBJF_REORDERED is true, then sort the pending blocks. */ | |
6d30eef8 | 1243 | |
c906108c SS |
1244 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) |
1245 | { | |
07e7f39f | 1246 | struct pending_block *pb; |
c906108c | 1247 | |
b05628f0 | 1248 | std::vector<block *> barray; |
c906108c | 1249 | |
07e7f39f | 1250 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1251 | barray.push_back (pb->block); |
07e7f39f | 1252 | |
5033013f UW |
1253 | /* Sort blocks by start address in descending order. Blocks with the |
1254 | same start address must remain in the original order to preserve | |
1255 | inline function caller/callee relationships. */ | |
1256 | std::stable_sort (barray.begin (), barray.end (), | |
1257 | [] (const block *a, const block *b) | |
1258 | { | |
1259 | return BLOCK_START (a) > BLOCK_START (b); | |
1260 | }); | |
07e7f39f | 1261 | |
b05628f0 | 1262 | int i = 0; |
07e7f39f | 1263 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1264 | pb->block = barray[i++]; |
c906108c SS |
1265 | } |
1266 | ||
1267 | /* Cleanup any undefined types that have been left hanging around | |
1268 | (this needs to be done before the finish_blocks so that | |
1269 | file_symbols is still good). | |
c5aa993b | 1270 | |
0a0edcd5 | 1271 | Both cleanup_undefined_stabs_types and finish_global_stabs are stabs |
c906108c SS |
1272 | specific, but harmless for other symbol readers, since on gdb |
1273 | startup or when finished reading stabs, the state is set so these | |
1274 | are no-ops. FIXME: Is this handled right in case of QUIT? Can | |
1275 | we make this cleaner? */ | |
1276 | ||
0a0edcd5 | 1277 | cleanup_undefined_stabs_types (objfile); |
c906108c SS |
1278 | finish_global_stabs (objfile); |
1279 | ||
36586728 TT |
1280 | if (!required |
1281 | && pending_blocks == NULL | |
c906108c SS |
1282 | && file_symbols == NULL |
1283 | && global_symbols == NULL | |
99d9066e | 1284 | && have_line_numbers == 0 |
22cee43f PMR |
1285 | && pending_macros == NULL |
1286 | && global_using_directives == NULL) | |
c906108c | 1287 | { |
4359dff1 JK |
1288 | /* Ignore symtabs that have no functions with real debugging info. */ |
1289 | return NULL; | |
1290 | } | |
1291 | else | |
1292 | { | |
1293 | /* Define the STATIC_BLOCK. */ | |
63e43d3a | 1294 | return finish_block_internal (NULL, &file_symbols, NULL, NULL, |
4d663531 | 1295 | last_source_start_addr, end_addr, |
4359dff1 JK |
1296 | 0, expandable); |
1297 | } | |
1298 | } | |
1299 | ||
7bab9b58 DE |
1300 | /* Subroutine of end_symtab_from_static_block to simplify it. |
1301 | Handle the "have blockvector" case. | |
1302 | See end_symtab_from_static_block for a description of the arguments. */ | |
1303 | ||
43f3e411 | 1304 | static struct compunit_symtab * |
7bab9b58 | 1305 | end_symtab_with_blockvector (struct block *static_block, |
4d663531 | 1306 | int section, int expandable) |
4359dff1 | 1307 | { |
43f3e411 DE |
1308 | struct objfile *objfile = buildsym_compunit->objfile; |
1309 | struct compunit_symtab *cu = buildsym_compunit->compunit_symtab; | |
7bab9b58 | 1310 | struct symtab *symtab; |
4359dff1 JK |
1311 | struct blockvector *blockvector; |
1312 | struct subfile *subfile; | |
7bab9b58 | 1313 | CORE_ADDR end_addr; |
4359dff1 | 1314 | |
7bab9b58 | 1315 | gdb_assert (static_block != NULL); |
43f3e411 DE |
1316 | gdb_assert (buildsym_compunit != NULL); |
1317 | gdb_assert (buildsym_compunit->subfiles != NULL); | |
7bab9b58 DE |
1318 | |
1319 | end_addr = BLOCK_END (static_block); | |
1320 | ||
1321 | /* Create the GLOBAL_BLOCK and build the blockvector. */ | |
63e43d3a | 1322 | finish_block_internal (NULL, &global_symbols, NULL, NULL, |
4d663531 | 1323 | last_source_start_addr, end_addr, |
7bab9b58 | 1324 | 1, expandable); |
43f3e411 | 1325 | blockvector = make_blockvector (); |
c906108c | 1326 | |
f56ce883 DE |
1327 | /* Read the line table if it has to be read separately. |
1328 | This is only used by xcoffread.c. */ | |
c295b2e5 | 1329 | if (objfile->sf->sym_read_linetable != NULL) |
f56ce883 | 1330 | objfile->sf->sym_read_linetable (objfile); |
c906108c | 1331 | |
4584e32e DE |
1332 | /* Handle the case where the debug info specifies a different path |
1333 | for the main source file. It can cause us to lose track of its | |
1334 | line number information. */ | |
1335 | watch_main_source_file_lossage (); | |
1336 | ||
43f3e411 DE |
1337 | /* Now create the symtab objects proper, if not already done, |
1338 | one for each subfile. */ | |
c906108c | 1339 | |
43f3e411 DE |
1340 | for (subfile = buildsym_compunit->subfiles; |
1341 | subfile != NULL; | |
1342 | subfile = subfile->next) | |
c906108c SS |
1343 | { |
1344 | int linetablesize = 0; | |
c906108c | 1345 | |
7bab9b58 | 1346 | if (subfile->line_vector) |
c906108c | 1347 | { |
7bab9b58 DE |
1348 | linetablesize = sizeof (struct linetable) + |
1349 | subfile->line_vector->nitems * sizeof (struct linetable_entry); | |
1350 | ||
1351 | /* Like the pending blocks, the line table may be | |
1352 | scrambled in reordered executables. Sort it if | |
1353 | OBJF_REORDERED is true. */ | |
1354 | if (objfile->flags & OBJF_REORDERED) | |
1355 | qsort (subfile->line_vector->item, | |
1356 | subfile->line_vector->nitems, | |
1357 | sizeof (struct linetable_entry), compare_line_numbers); | |
1358 | } | |
9182c5bc | 1359 | |
7bab9b58 DE |
1360 | /* Allocate a symbol table if necessary. */ |
1361 | if (subfile->symtab == NULL) | |
43f3e411 | 1362 | subfile->symtab = allocate_symtab (cu, subfile->name); |
7bab9b58 | 1363 | symtab = subfile->symtab; |
9182c5bc | 1364 | |
7bab9b58 | 1365 | /* Fill in its components. */ |
43f3e411 | 1366 | |
7bab9b58 DE |
1367 | if (subfile->line_vector) |
1368 | { | |
1369 | /* Reallocate the line table on the symbol obstack. */ | |
8435453b | 1370 | SYMTAB_LINETABLE (symtab) = (struct linetable *) |
7bab9b58 | 1371 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
8435453b DE |
1372 | memcpy (SYMTAB_LINETABLE (symtab), subfile->line_vector, |
1373 | linetablesize); | |
c906108c | 1374 | } |
24be086d | 1375 | else |
c906108c | 1376 | { |
8435453b | 1377 | SYMTAB_LINETABLE (symtab) = NULL; |
c906108c | 1378 | } |
c906108c | 1379 | |
7bab9b58 DE |
1380 | /* Use whatever language we have been using for this |
1381 | subfile, not the one that was deduced in allocate_symtab | |
1382 | from the filename. We already did our own deducing when | |
1383 | we created the subfile, and we may have altered our | |
1384 | opinion of what language it is from things we found in | |
1385 | the symbols. */ | |
1386 | symtab->language = subfile->language; | |
43f3e411 | 1387 | } |
c906108c | 1388 | |
43f3e411 DE |
1389 | /* Make sure the symtab of main_subfile is the first in its list. */ |
1390 | { | |
1391 | struct symtab *main_symtab, *prev_symtab; | |
1392 | ||
1393 | main_symtab = buildsym_compunit->main_subfile->symtab; | |
1394 | prev_symtab = NULL; | |
1395 | ALL_COMPUNIT_FILETABS (cu, symtab) | |
1396 | { | |
1397 | if (symtab == main_symtab) | |
1398 | { | |
1399 | if (prev_symtab != NULL) | |
1400 | { | |
1401 | prev_symtab->next = main_symtab->next; | |
1402 | main_symtab->next = COMPUNIT_FILETABS (cu); | |
1403 | COMPUNIT_FILETABS (cu) = main_symtab; | |
1404 | } | |
1405 | break; | |
1406 | } | |
1407 | prev_symtab = symtab; | |
1408 | } | |
1409 | gdb_assert (main_symtab == COMPUNIT_FILETABS (cu)); | |
1410 | } | |
84a146c9 | 1411 | |
0ab9ce85 | 1412 | /* Fill out the compunit symtab. */ |
84a146c9 | 1413 | |
43f3e411 DE |
1414 | if (buildsym_compunit->comp_dir != NULL) |
1415 | { | |
1416 | /* Reallocate the dirname on the symbol obstack. */ | |
1417 | COMPUNIT_DIRNAME (cu) | |
224c3ddb SM |
1418 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
1419 | buildsym_compunit->comp_dir, | |
1420 | strlen (buildsym_compunit->comp_dir)); | |
c906108c SS |
1421 | } |
1422 | ||
43f3e411 DE |
1423 | /* Save the debug format string (if any) in the symtab. */ |
1424 | COMPUNIT_DEBUGFORMAT (cu) = buildsym_compunit->debugformat; | |
1425 | ||
1426 | /* Similarly for the producer. */ | |
1427 | COMPUNIT_PRODUCER (cu) = buildsym_compunit->producer; | |
1428 | ||
1429 | COMPUNIT_BLOCKVECTOR (cu) = blockvector; | |
7bab9b58 | 1430 | { |
43f3e411 | 1431 | struct block *b = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); |
cb1df416 | 1432 | |
43f3e411 | 1433 | set_block_compunit_symtab (b, cu); |
7bab9b58 | 1434 | } |
cb1df416 | 1435 | |
43f3e411 DE |
1436 | COMPUNIT_BLOCK_LINE_SECTION (cu) = section; |
1437 | ||
1438 | COMPUNIT_MACRO_TABLE (cu) = pending_macros; | |
1439 | ||
7bab9b58 DE |
1440 | /* Default any symbols without a specified symtab to the primary symtab. */ |
1441 | { | |
1442 | int block_i; | |
1443 | ||
43f3e411 DE |
1444 | /* The main source file's symtab. */ |
1445 | symtab = COMPUNIT_FILETABS (cu); | |
1446 | ||
7bab9b58 DE |
1447 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) |
1448 | { | |
1449 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); | |
1450 | struct symbol *sym; | |
1451 | struct dict_iterator iter; | |
1452 | ||
1453 | /* Inlined functions may have symbols not in the global or | |
1454 | static symbol lists. */ | |
1455 | if (BLOCK_FUNCTION (block) != NULL) | |
08be3fe3 DE |
1456 | if (symbol_symtab (BLOCK_FUNCTION (block)) == NULL) |
1457 | symbol_set_symtab (BLOCK_FUNCTION (block), symtab); | |
7bab9b58 DE |
1458 | |
1459 | /* Note that we only want to fix up symbols from the local | |
1460 | blocks, not blocks coming from included symtabs. That is why | |
1461 | we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */ | |
1462 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
08be3fe3 DE |
1463 | if (symbol_symtab (sym) == NULL) |
1464 | symbol_set_symtab (sym, symtab); | |
7bab9b58 DE |
1465 | } |
1466 | } | |
edb3359d | 1467 | |
43f3e411 | 1468 | add_compunit_symtab_to_objfile (cu); |
43f3e411 DE |
1469 | |
1470 | return cu; | |
7bab9b58 DE |
1471 | } |
1472 | ||
1473 | /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK | |
1474 | as value returned by end_symtab_get_static_block. | |
1475 | ||
1476 | SECTION is the same as for end_symtab: the section number | |
1477 | (in objfile->section_offsets) of the blockvector and linetable. | |
1478 | ||
1479 | If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made | |
1480 | expandable. */ | |
1481 | ||
43f3e411 | 1482 | struct compunit_symtab * |
7bab9b58 | 1483 | end_symtab_from_static_block (struct block *static_block, |
4d663531 | 1484 | int section, int expandable) |
7bab9b58 | 1485 | { |
43f3e411 | 1486 | struct compunit_symtab *cu; |
7bab9b58 DE |
1487 | |
1488 | if (static_block == NULL) | |
1489 | { | |
0ab9ce85 DE |
1490 | /* Handle the "no blockvector" case. |
1491 | When this happens there is nothing to record, so there's nothing | |
1492 | to do: memory will be freed up later. | |
1493 | ||
1494 | Note: We won't be adding a compunit to the objfile's list of | |
1495 | compunits, so there's nothing to unchain. However, since each symtab | |
1496 | is added to the objfile's obstack we can't free that space. | |
1497 | We could do better, but this is believed to be a sufficiently rare | |
1498 | event. */ | |
43f3e411 | 1499 | cu = NULL; |
7bab9b58 DE |
1500 | } |
1501 | else | |
43f3e411 | 1502 | cu = end_symtab_with_blockvector (static_block, section, expandable); |
cb1df416 | 1503 | |
6d30eef8 DE |
1504 | reset_symtab_globals (); |
1505 | ||
43f3e411 | 1506 | return cu; |
6d30eef8 DE |
1507 | } |
1508 | ||
4359dff1 JK |
1509 | /* Finish the symbol definitions for one main source file, close off |
1510 | all the lexical contexts for that file (creating struct block's for | |
1511 | them), then make the struct symtab for that file and put it in the | |
1512 | list of all such. | |
1513 | ||
1514 | END_ADDR is the address of the end of the file's text. SECTION is | |
1515 | the section number (in objfile->section_offsets) of the blockvector | |
1516 | and linetable. | |
1517 | ||
1518 | Note that it is possible for end_symtab() to return NULL. In | |
1519 | particular, for the DWARF case at least, it will return NULL when | |
1520 | it finds a compilation unit that has exactly one DIE, a | |
1521 | TAG_compile_unit DIE. This can happen when we link in an object | |
1522 | file that was compiled from an empty source file. Returning NULL | |
1523 | is probably not the correct thing to do, because then gdb will | |
1524 | never know about this empty file (FIXME). | |
1525 | ||
1526 | If you need to modify STATIC_BLOCK before it is finalized you should | |
1527 | call end_symtab_get_static_block and end_symtab_from_static_block | |
1528 | yourself. */ | |
6d30eef8 | 1529 | |
43f3e411 | 1530 | struct compunit_symtab * |
4d663531 | 1531 | end_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1532 | { |
4359dff1 JK |
1533 | struct block *static_block; |
1534 | ||
4d663531 DE |
1535 | static_block = end_symtab_get_static_block (end_addr, 0, 0); |
1536 | return end_symtab_from_static_block (static_block, section, 0); | |
6d30eef8 DE |
1537 | } |
1538 | ||
4359dff1 | 1539 | /* Same as end_symtab except create a symtab that can be later added to. */ |
6d30eef8 | 1540 | |
43f3e411 | 1541 | struct compunit_symtab * |
4d663531 | 1542 | end_expandable_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1543 | { |
4359dff1 JK |
1544 | struct block *static_block; |
1545 | ||
4d663531 DE |
1546 | static_block = end_symtab_get_static_block (end_addr, 1, 0); |
1547 | return end_symtab_from_static_block (static_block, section, 1); | |
6d30eef8 DE |
1548 | } |
1549 | ||
1550 | /* Subroutine of augment_type_symtab to simplify it. | |
43f3e411 DE |
1551 | Attach the main source file's symtab to all symbols in PENDING_LIST that |
1552 | don't have one. */ | |
6d30eef8 DE |
1553 | |
1554 | static void | |
43f3e411 DE |
1555 | set_missing_symtab (struct pending *pending_list, |
1556 | struct compunit_symtab *cu) | |
6d30eef8 DE |
1557 | { |
1558 | struct pending *pending; | |
1559 | int i; | |
1560 | ||
1561 | for (pending = pending_list; pending != NULL; pending = pending->next) | |
801e3a5b | 1562 | { |
6d30eef8 DE |
1563 | for (i = 0; i < pending->nsyms; ++i) |
1564 | { | |
08be3fe3 DE |
1565 | if (symbol_symtab (pending->symbol[i]) == NULL) |
1566 | symbol_set_symtab (pending->symbol[i], COMPUNIT_FILETABS (cu)); | |
6d30eef8 | 1567 | } |
801e3a5b | 1568 | } |
6d30eef8 | 1569 | } |
c906108c | 1570 | |
6d30eef8 DE |
1571 | /* Same as end_symtab, but for the case where we're adding more symbols |
1572 | to an existing symtab that is known to contain only type information. | |
1573 | This is the case for DWARF4 Type Units. */ | |
1574 | ||
1575 | void | |
0ab9ce85 | 1576 | augment_type_symtab (void) |
6d30eef8 | 1577 | { |
0ab9ce85 | 1578 | struct compunit_symtab *cust = buildsym_compunit->compunit_symtab; |
43f3e411 | 1579 | const struct blockvector *blockvector = COMPUNIT_BLOCKVECTOR (cust); |
6d30eef8 DE |
1580 | |
1581 | if (context_stack_depth > 0) | |
1582 | { | |
b98664d3 | 1583 | complaint (_("Context stack not empty in augment_type_symtab")); |
6d30eef8 DE |
1584 | context_stack_depth = 0; |
1585 | } | |
1586 | if (pending_blocks != NULL) | |
b98664d3 | 1587 | complaint (_("Blocks in a type symtab")); |
6d30eef8 | 1588 | if (pending_macros != NULL) |
b98664d3 | 1589 | complaint (_("Macro in a type symtab")); |
6d30eef8 | 1590 | if (have_line_numbers) |
b98664d3 | 1591 | complaint (_("Line numbers recorded in a type symtab")); |
6d30eef8 DE |
1592 | |
1593 | if (file_symbols != NULL) | |
1594 | { | |
1595 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK); | |
1596 | ||
1597 | /* First mark any symbols without a specified symtab as belonging | |
1598 | to the primary symtab. */ | |
43f3e411 | 1599 | set_missing_symtab (file_symbols, cust); |
6d30eef8 DE |
1600 | |
1601 | dict_add_pending (BLOCK_DICT (block), file_symbols); | |
1602 | } | |
1603 | ||
1604 | if (global_symbols != NULL) | |
1605 | { | |
1606 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); | |
1607 | ||
1608 | /* First mark any symbols without a specified symtab as belonging | |
1609 | to the primary symtab. */ | |
43f3e411 | 1610 | set_missing_symtab (global_symbols, cust); |
6d30eef8 DE |
1611 | |
1612 | dict_add_pending (BLOCK_DICT (block), global_symbols); | |
1613 | } | |
1614 | ||
1615 | reset_symtab_globals (); | |
c906108c SS |
1616 | } |
1617 | ||
1618 | /* Push a context block. Args are an identifying nesting level | |
1619 | (checkable when you pop it), and the starting PC address of this | |
1620 | context. */ | |
1621 | ||
1622 | struct context_stack * | |
1623 | push_context (int desc, CORE_ADDR valu) | |
1624 | { | |
fe978cb0 | 1625 | struct context_stack *newobj; |
c906108c SS |
1626 | |
1627 | if (context_stack_depth == context_stack_size) | |
1628 | { | |
1629 | context_stack_size *= 2; | |
1630 | context_stack = (struct context_stack *) | |
1631 | xrealloc ((char *) context_stack, | |
c5aa993b | 1632 | (context_stack_size * sizeof (struct context_stack))); |
c906108c SS |
1633 | } |
1634 | ||
fe978cb0 PA |
1635 | newobj = &context_stack[context_stack_depth++]; |
1636 | newobj->depth = desc; | |
1637 | newobj->locals = local_symbols; | |
1638 | newobj->old_blocks = pending_blocks; | |
1639 | newobj->start_addr = valu; | |
22cee43f | 1640 | newobj->local_using_directives = local_using_directives; |
fe978cb0 | 1641 | newobj->name = NULL; |
c906108c SS |
1642 | |
1643 | local_symbols = NULL; | |
22cee43f | 1644 | local_using_directives = NULL; |
c906108c | 1645 | |
fe978cb0 | 1646 | return newobj; |
c906108c | 1647 | } |
0c5e171a | 1648 | |
a672ef13 | 1649 | /* Pop a context block. Returns the address of the context block just |
4a64f543 | 1650 | popped. */ |
a672ef13 | 1651 | |
0c5e171a KD |
1652 | struct context_stack * |
1653 | pop_context (void) | |
1654 | { | |
1655 | gdb_assert (context_stack_depth > 0); | |
1656 | return (&context_stack[--context_stack_depth]); | |
1657 | } | |
1658 | ||
c906108c | 1659 | \f |
357e46e7 | 1660 | |
4a64f543 | 1661 | /* Compute a small integer hash code for the given name. */ |
c906108c SS |
1662 | |
1663 | int | |
0d5cff50 | 1664 | hashname (const char *name) |
c906108c | 1665 | { |
357e46e7 | 1666 | return (hash(name,strlen(name)) % HASHSIZE); |
c906108c SS |
1667 | } |
1668 | \f | |
1669 | ||
1670 | void | |
554d387d | 1671 | record_debugformat (const char *format) |
c906108c | 1672 | { |
43f3e411 | 1673 | buildsym_compunit->debugformat = format; |
c906108c SS |
1674 | } |
1675 | ||
303b6f5d DJ |
1676 | void |
1677 | record_producer (const char *producer) | |
1678 | { | |
43f3e411 | 1679 | buildsym_compunit->producer = producer; |
303b6f5d DJ |
1680 | } |
1681 | ||
c906108c SS |
1682 | /* Merge the first symbol list SRCLIST into the second symbol list |
1683 | TARGETLIST by repeated calls to add_symbol_to_list(). This | |
1684 | procedure "frees" each link of SRCLIST by adding it to the | |
1685 | free_pendings list. Caller must set SRCLIST to a null list after | |
1686 | calling this function. | |
1687 | ||
4a64f543 | 1688 | Void return. */ |
c906108c SS |
1689 | |
1690 | void | |
1691 | merge_symbol_lists (struct pending **srclist, struct pending **targetlist) | |
1692 | { | |
52f0bd74 | 1693 | int i; |
c906108c SS |
1694 | |
1695 | if (!srclist || !*srclist) | |
1696 | return; | |
1697 | ||
1698 | /* Merge in elements from current link. */ | |
1699 | for (i = 0; i < (*srclist)->nsyms; i++) | |
1700 | add_symbol_to_list ((*srclist)->symbol[i], targetlist); | |
1701 | ||
1702 | /* Recurse on next. */ | |
1703 | merge_symbol_lists (&(*srclist)->next, targetlist); | |
1704 | ||
1705 | /* "Free" the current link. */ | |
1706 | (*srclist)->next = free_pendings; | |
1707 | free_pendings = (*srclist); | |
1708 | } | |
1709 | \f | |
46212e0b TT |
1710 | |
1711 | /* Name of source file whose symbol data we are now processing. This | |
1712 | comes from a symbol of type N_SO for stabs. For Dwarf it comes | |
1713 | from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */ | |
1714 | ||
1715 | static char *last_source_file; | |
1716 | ||
1717 | /* See buildsym.h. */ | |
1718 | ||
1719 | void | |
1720 | set_last_source_file (const char *name) | |
1721 | { | |
1722 | xfree (last_source_file); | |
1723 | last_source_file = name == NULL ? NULL : xstrdup (name); | |
1724 | } | |
1725 | ||
1726 | /* See buildsym.h. */ | |
1727 | ||
1728 | const char * | |
1729 | get_last_source_file (void) | |
1730 | { | |
1731 | return last_source_file; | |
1732 | } | |
1733 | ||
1734 | \f | |
1735 | ||
c906108c SS |
1736 | /* Initialize anything that needs initializing when starting to read a |
1737 | fresh piece of a symbol file, e.g. reading in the stuff | |
1738 | corresponding to a psymtab. */ | |
1739 | ||
1740 | void | |
fba45db2 | 1741 | buildsym_init (void) |
c906108c | 1742 | { |
fc474241 | 1743 | subfile_stack = NULL; |
801e3a5b | 1744 | |
801e3a5b | 1745 | pending_addrmap_interesting = 0; |
0ab9ce85 DE |
1746 | |
1747 | /* Context stack is initially empty. Allocate first one with room | |
1748 | for a few levels; reuse it forever afterward. */ | |
1749 | if (context_stack == NULL) | |
1750 | { | |
1751 | context_stack_size = INITIAL_CONTEXT_STACK_SIZE; | |
8d749320 | 1752 | context_stack = XNEWVEC (struct context_stack, context_stack_size); |
0ab9ce85 DE |
1753 | } |
1754 | ||
33c7c59d | 1755 | /* Ensure the scoped_free_pendings destructor was called after |
0ab9ce85 DE |
1756 | the last time. */ |
1757 | gdb_assert (free_pendings == NULL); | |
1758 | gdb_assert (pending_blocks == NULL); | |
1759 | gdb_assert (file_symbols == NULL); | |
1760 | gdb_assert (global_symbols == NULL); | |
22cee43f | 1761 | gdb_assert (global_using_directives == NULL); |
0ab9ce85 DE |
1762 | gdb_assert (pending_macros == NULL); |
1763 | gdb_assert (pending_addrmap == NULL); | |
1764 | gdb_assert (buildsym_compunit == NULL); | |
c906108c SS |
1765 | } |
1766 | ||
1767 | /* Initialize anything that needs initializing when a completely new | |
1768 | symbol file is specified (not just adding some symbols from another | |
1769 | file, e.g. a shared library). */ | |
1770 | ||
1771 | void | |
fba45db2 | 1772 | buildsym_new_init (void) |
c906108c SS |
1773 | { |
1774 | buildsym_init (); | |
1775 | } |