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... */ |
4a64f543 | 77 | #include "filenames.h" /* For DOSish file names. */ |
99d9066e | 78 | #include "macrotab.h" |
261397f8 | 79 | #include "demangle.h" /* Needed by SYMBOL_INIT_DEMANGLED_NAME. */ |
fe898f56 | 80 | #include "block.h" |
9219021c | 81 | #include "cp-support.h" |
de4f826b | 82 | #include "dictionary.h" |
801e3a5b | 83 | #include "addrmap.h" |
b05628f0 | 84 | #include <algorithm> |
9219021c | 85 | |
c906108c | 86 | /* Ask buildsym.h to define the vars it normally declares `extern'. */ |
c5aa993b JM |
87 | #define EXTERN |
88 | /**/ | |
4a64f543 | 89 | #include "buildsym.h" /* Our own declarations. */ |
c906108c SS |
90 | #undef EXTERN |
91 | ||
0a0edcd5 | 92 | /* For cleanup_undefined_stabs_types and finish_global_stabs (somewhat |
c906108c SS |
93 | questionable--see comment where we call them). */ |
94 | ||
95 | #include "stabsread.h" | |
96 | ||
43f3e411 DE |
97 | /* Buildsym's counterpart to struct compunit_symtab. |
98 | TODO(dje): Move all related global state into here. */ | |
4d663531 | 99 | |
43f3e411 DE |
100 | struct buildsym_compunit |
101 | { | |
b248663f TT |
102 | /* Start recording information about a primary source file (IOW, not an |
103 | included source file). | |
104 | COMP_DIR is the directory in which the compilation unit was compiled | |
105 | (or NULL if not known). */ | |
106 | ||
c0015d44 | 107 | buildsym_compunit (struct objfile *objfile_, const char *name, |
2c99ee5c TT |
108 | const char *comp_dir_, enum language language_, |
109 | CORE_ADDR last_addr) | |
b248663f | 110 | : objfile (objfile_), |
c0015d44 | 111 | m_last_source_file (name == nullptr ? nullptr : xstrdup (name)), |
b248663f | 112 | comp_dir (comp_dir_ == nullptr ? nullptr : xstrdup (comp_dir_)), |
2c99ee5c TT |
113 | language (language_), |
114 | m_last_source_start_addr (last_addr) | |
b248663f TT |
115 | { |
116 | } | |
117 | ||
118 | ~buildsym_compunit () | |
119 | { | |
120 | struct subfile *subfile, *nextsub; | |
121 | ||
6a976300 TT |
122 | if (m_pending_macros != nullptr) |
123 | free_macro_table (m_pending_macros); | |
124 | ||
b248663f TT |
125 | for (subfile = subfiles; |
126 | subfile != NULL; | |
127 | subfile = nextsub) | |
128 | { | |
129 | nextsub = subfile->next; | |
130 | xfree (subfile->name); | |
131 | xfree (subfile->line_vector); | |
132 | xfree (subfile); | |
133 | } | |
b248663f TT |
134 | } |
135 | ||
c0015d44 TT |
136 | void set_last_source_file (const char *name) |
137 | { | |
138 | char *new_name = name == NULL ? NULL : xstrdup (name); | |
139 | m_last_source_file.reset (new_name); | |
140 | } | |
141 | ||
6a976300 TT |
142 | struct macro_table *get_macro_table () |
143 | { | |
144 | if (m_pending_macros == nullptr) | |
145 | m_pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, | |
146 | objfile->per_bfd->macro_cache, | |
147 | compunit_symtab); | |
148 | return m_pending_macros; | |
149 | } | |
150 | ||
151 | struct macro_table *release_macros () | |
152 | { | |
153 | struct macro_table *result = m_pending_macros; | |
154 | m_pending_macros = nullptr; | |
155 | return result; | |
156 | } | |
157 | ||
43f3e411 DE |
158 | /* The objfile we're reading debug info from. */ |
159 | struct objfile *objfile; | |
160 | ||
161 | /* List of subfiles (source files). | |
162 | Files are added to the front of the list. | |
163 | This is important mostly for the language determination hacks we use, | |
164 | which iterate over previously added files. */ | |
b248663f | 165 | struct subfile *subfiles = nullptr; |
43f3e411 DE |
166 | |
167 | /* The subfile of the main source file. */ | |
b248663f | 168 | struct subfile *main_subfile = nullptr; |
4d663531 | 169 | |
c0015d44 TT |
170 | /* Name of source file whose symbol data we are now processing. This |
171 | comes from a symbol of type N_SO for stabs. For DWARF it comes | |
172 | from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */ | |
173 | gdb::unique_xmalloc_ptr<char> m_last_source_file; | |
174 | ||
43f3e411 | 175 | /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */ |
905eb0e2 | 176 | gdb::unique_xmalloc_ptr<char> comp_dir; |
4d663531 | 177 | |
43f3e411 DE |
178 | /* Space for this is not malloc'd, and is assumed to have at least |
179 | the same lifetime as objfile. */ | |
b248663f | 180 | const char *producer = nullptr; |
4d663531 | 181 | |
43f3e411 DE |
182 | /* Space for this is not malloc'd, and is assumed to have at least |
183 | the same lifetime as objfile. */ | |
b248663f | 184 | const char *debugformat = nullptr; |
94d09e04 | 185 | |
43f3e411 | 186 | /* The compunit we are building. */ |
b248663f | 187 | struct compunit_symtab *compunit_symtab = nullptr; |
5ffa0793 PA |
188 | |
189 | /* Language of this compunit_symtab. */ | |
190 | enum language language; | |
6a976300 TT |
191 | |
192 | /* The macro table for the compilation unit whose symbols we're | |
193 | currently reading. */ | |
194 | struct macro_table *m_pending_macros = nullptr; | |
530fedbc TT |
195 | |
196 | /* True if symtab has line number info. This prevents an otherwise | |
197 | empty symtab from being tossed. */ | |
198 | bool m_have_line_numbers = false; | |
2c99ee5c TT |
199 | |
200 | /* Core address of start of text of current source file. This too | |
201 | comes from the N_SO symbol. For Dwarf it typically comes from the | |
202 | DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */ | |
203 | CORE_ADDR m_last_source_start_addr; | |
43f3e411 | 204 | }; |
94d09e04 | 205 | |
43f3e411 DE |
206 | /* The work-in-progress of the compunit we are building. |
207 | This is created first, before any subfiles by start_symtab. */ | |
7bab9b58 | 208 | |
43f3e411 | 209 | static struct buildsym_compunit *buildsym_compunit; |
7bab9b58 | 210 | |
c906108c SS |
211 | /* List of free `struct pending' structures for reuse. */ |
212 | ||
213 | static struct pending *free_pendings; | |
214 | ||
801e3a5b JB |
215 | /* The mutable address map for the compilation unit whose symbols |
216 | we're currently reading. The symtabs' shared blockvector will | |
217 | point to a fixed copy of this. */ | |
218 | static struct addrmap *pending_addrmap; | |
219 | ||
220 | /* The obstack on which we allocate pending_addrmap. | |
221 | If pending_addrmap is NULL, this is uninitialized; otherwise, it is | |
222 | initialized (and holds pending_addrmap). */ | |
223 | static struct obstack pending_addrmap_obstack; | |
224 | ||
225 | /* Non-zero if we recorded any ranges in the addrmap that are | |
226 | different from those in the blockvector already. We set this to | |
227 | zero when we start processing a symfile, and if it's still zero at | |
228 | the end, then we just toss the addrmap. */ | |
229 | static int pending_addrmap_interesting; | |
230 | ||
93eed41f TT |
231 | /* An obstack used for allocating pending blocks. */ |
232 | ||
233 | static struct obstack pending_block_obstack; | |
234 | ||
235 | /* List of blocks already made (lexical contexts already closed). | |
236 | This is used at the end to make the blockvector. */ | |
237 | ||
238 | struct pending_block | |
239 | { | |
240 | struct pending_block *next; | |
241 | struct block *block; | |
242 | }; | |
243 | ||
244 | /* Pointer to the head of a linked list of symbol blocks which have | |
245 | already been finalized (lexical contexts already closed) and which | |
246 | are just waiting to be built into a blockvector when finalizing the | |
247 | associated symtab. */ | |
248 | ||
249 | static struct pending_block *pending_blocks; | |
fc474241 DE |
250 | |
251 | struct subfile_stack | |
252 | { | |
253 | struct subfile_stack *next; | |
254 | char *name; | |
255 | }; | |
256 | ||
257 | static struct subfile_stack *subfile_stack; | |
258 | ||
0ec44fc0 TT |
259 | /* Currently allocated size of context stack. */ |
260 | ||
261 | static int context_stack_size; | |
262 | ||
0ab9ce85 DE |
263 | static void free_buildsym_compunit (void); |
264 | ||
c906108c | 265 | static int compare_line_numbers (const void *ln1p, const void *ln2p); |
0b49e518 TT |
266 | |
267 | static void record_pending_block (struct objfile *objfile, | |
268 | struct block *block, | |
269 | struct pending_block *opblock); | |
c906108c SS |
270 | |
271 | /* Initial sizes of data structures. These are realloc'd larger if | |
272 | needed, and realloc'd down to the size actually used, when | |
273 | completed. */ | |
274 | ||
275 | #define INITIAL_CONTEXT_STACK_SIZE 10 | |
276 | #define INITIAL_LINE_VECTOR_LENGTH 1000 | |
277 | \f | |
278 | ||
4a64f543 | 279 | /* Maintain the lists of symbols and blocks. */ |
c906108c | 280 | |
93bf33fd | 281 | /* Add a symbol to one of the lists of symbols. */ |
c906108c SS |
282 | |
283 | void | |
284 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
285 | { | |
52f0bd74 | 286 | struct pending *link; |
c906108c SS |
287 | |
288 | /* If this is an alias for another symbol, don't add it. */ | |
289 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') | |
290 | return; | |
291 | ||
4a64f543 | 292 | /* We keep PENDINGSIZE symbols in each link of the list. If we |
c906108c SS |
293 | don't have a link with room in it, add a new link. */ |
294 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) | |
295 | { | |
296 | if (free_pendings) | |
297 | { | |
298 | link = free_pendings; | |
299 | free_pendings = link->next; | |
300 | } | |
301 | else | |
302 | { | |
8d749320 | 303 | link = XNEW (struct pending); |
c906108c SS |
304 | } |
305 | ||
306 | link->next = *listhead; | |
307 | *listhead = link; | |
308 | link->nsyms = 0; | |
309 | } | |
310 | ||
311 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; | |
312 | } | |
313 | ||
314 | /* Find a symbol named NAME on a LIST. NAME need not be | |
315 | '\0'-terminated; LENGTH is the length of the name. */ | |
316 | ||
317 | struct symbol * | |
318 | find_symbol_in_list (struct pending *list, char *name, int length) | |
319 | { | |
320 | int j; | |
0d5cff50 | 321 | const char *pp; |
c906108c SS |
322 | |
323 | while (list != NULL) | |
324 | { | |
325 | for (j = list->nsyms; --j >= 0;) | |
326 | { | |
3567439c | 327 | pp = SYMBOL_LINKAGE_NAME (list->symbol[j]); |
5aafa1cc PM |
328 | if (*pp == *name && strncmp (pp, name, length) == 0 |
329 | && pp[length] == '\0') | |
c906108c SS |
330 | { |
331 | return (list->symbol[j]); | |
332 | } | |
333 | } | |
334 | list = list->next; | |
335 | } | |
336 | return (NULL); | |
337 | } | |
338 | ||
33c7c59d TT |
339 | /* At end of reading syms, or in case of quit, ensure everything |
340 | associated with building symtabs is freed. | |
0ab9ce85 DE |
341 | |
342 | N.B. This is *not* intended to be used when building psymtabs. Some debug | |
343 | info readers call this anyway, which is harmless if confusing. */ | |
c906108c | 344 | |
33c7c59d | 345 | scoped_free_pendings::~scoped_free_pendings () |
c906108c SS |
346 | { |
347 | struct pending *next, *next1; | |
348 | ||
349 | for (next = free_pendings; next; next = next1) | |
350 | { | |
351 | next1 = next->next; | |
b8c9b27d | 352 | xfree ((void *) next); |
c906108c SS |
353 | } |
354 | free_pendings = NULL; | |
355 | ||
356 | free_pending_blocks (); | |
357 | ||
358 | for (next = file_symbols; next != NULL; next = next1) | |
359 | { | |
360 | next1 = next->next; | |
b8c9b27d | 361 | xfree ((void *) next); |
c906108c SS |
362 | } |
363 | file_symbols = NULL; | |
364 | ||
365 | for (next = global_symbols; next != NULL; next = next1) | |
366 | { | |
367 | next1 = next->next; | |
b8c9b27d | 368 | xfree ((void *) next); |
c906108c SS |
369 | } |
370 | global_symbols = NULL; | |
99d9066e | 371 | |
801e3a5b | 372 | if (pending_addrmap) |
0ab9ce85 DE |
373 | obstack_free (&pending_addrmap_obstack, NULL); |
374 | pending_addrmap = NULL; | |
375 | ||
376 | free_buildsym_compunit (); | |
c906108c SS |
377 | } |
378 | ||
4a64f543 | 379 | /* This function is called to discard any pending blocks. */ |
c906108c SS |
380 | |
381 | void | |
382 | free_pending_blocks (void) | |
383 | { | |
93eed41f TT |
384 | if (pending_blocks != NULL) |
385 | { | |
386 | obstack_free (&pending_block_obstack, NULL); | |
387 | pending_blocks = NULL; | |
388 | } | |
c906108c SS |
389 | } |
390 | ||
391 | /* Take one of the lists of symbols and make a block from it. Keep | |
392 | the order the symbols have in the list (reversed from the input | |
393 | file). Put the block on the list of pending blocks. */ | |
394 | ||
84a146c9 | 395 | static struct block * |
63e43d3a PMR |
396 | finish_block_internal (struct symbol *symbol, |
397 | struct pending **listhead, | |
84a146c9 | 398 | struct pending_block *old_blocks, |
63e43d3a | 399 | const struct dynamic_prop *static_link, |
84a146c9 | 400 | CORE_ADDR start, CORE_ADDR end, |
6d30eef8 | 401 | int is_global, int expandable) |
c906108c | 402 | { |
43f3e411 | 403 | struct objfile *objfile = buildsym_compunit->objfile; |
5af949e3 | 404 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
52f0bd74 AC |
405 | struct pending *next, *next1; |
406 | struct block *block; | |
407 | struct pending_block *pblock; | |
c906108c | 408 | struct pending_block *opblock; |
c906108c | 409 | |
84a146c9 TT |
410 | block = (is_global |
411 | ? allocate_global_block (&objfile->objfile_obstack) | |
412 | : allocate_block (&objfile->objfile_obstack)); | |
c906108c | 413 | |
261397f8 DJ |
414 | if (symbol) |
415 | { | |
5ffa0793 PA |
416 | BLOCK_DICT (block) |
417 | = dict_create_linear (&objfile->objfile_obstack, | |
418 | buildsym_compunit->language, *listhead); | |
261397f8 DJ |
419 | } |
420 | else | |
c906108c | 421 | { |
6d30eef8 DE |
422 | if (expandable) |
423 | { | |
5ffa0793 PA |
424 | BLOCK_DICT (block) |
425 | = dict_create_hashed_expandable (buildsym_compunit->language); | |
6d30eef8 DE |
426 | dict_add_pending (BLOCK_DICT (block), *listhead); |
427 | } | |
428 | else | |
429 | { | |
430 | BLOCK_DICT (block) = | |
5ffa0793 PA |
431 | dict_create_hashed (&objfile->objfile_obstack, |
432 | buildsym_compunit->language, *listhead); | |
6d30eef8 | 433 | } |
c906108c SS |
434 | } |
435 | ||
436 | BLOCK_START (block) = start; | |
437 | BLOCK_END (block) = end; | |
c906108c | 438 | |
c906108c SS |
439 | /* Put the block in as the value of the symbol that names it. */ |
440 | ||
441 | if (symbol) | |
442 | { | |
443 | struct type *ftype = SYMBOL_TYPE (symbol); | |
de4f826b | 444 | struct dict_iterator iter; |
c906108c SS |
445 | SYMBOL_BLOCK_VALUE (symbol) = block; |
446 | BLOCK_FUNCTION (block) = symbol; | |
447 | ||
448 | if (TYPE_NFIELDS (ftype) <= 0) | |
449 | { | |
450 | /* No parameter type information is recorded with the | |
451 | function's type. Set that from the type of the | |
4a64f543 | 452 | parameter symbols. */ |
c906108c SS |
453 | int nparams = 0, iparams; |
454 | struct symbol *sym; | |
8157b174 TT |
455 | |
456 | /* Here we want to directly access the dictionary, because | |
457 | we haven't fully initialized the block yet. */ | |
458 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 459 | { |
2a2d4dc3 AS |
460 | if (SYMBOL_IS_ARGUMENT (sym)) |
461 | nparams++; | |
c906108c SS |
462 | } |
463 | if (nparams > 0) | |
464 | { | |
465 | TYPE_NFIELDS (ftype) = nparams; | |
466 | TYPE_FIELDS (ftype) = (struct field *) | |
467 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); | |
468 | ||
de4f826b | 469 | iparams = 0; |
8157b174 TT |
470 | /* Here we want to directly access the dictionary, because |
471 | we haven't fully initialized the block yet. */ | |
472 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 473 | { |
de4f826b DC |
474 | if (iparams == nparams) |
475 | break; | |
476 | ||
2a2d4dc3 | 477 | if (SYMBOL_IS_ARGUMENT (sym)) |
c906108c | 478 | { |
c906108c | 479 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
8176bb6d | 480 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
c906108c | 481 | iparams++; |
c906108c SS |
482 | } |
483 | } | |
484 | } | |
485 | } | |
486 | } | |
487 | else | |
488 | { | |
489 | BLOCK_FUNCTION (block) = NULL; | |
490 | } | |
491 | ||
63e43d3a PMR |
492 | if (static_link != NULL) |
493 | objfile_register_static_link (objfile, block, static_link); | |
494 | ||
c906108c SS |
495 | /* Now "free" the links of the list, and empty the list. */ |
496 | ||
497 | for (next = *listhead; next; next = next1) | |
498 | { | |
499 | next1 = next->next; | |
500 | next->next = free_pendings; | |
501 | free_pendings = next; | |
502 | } | |
503 | *listhead = NULL; | |
504 | ||
c906108c | 505 | /* Check to be sure that the blocks have an end address that is |
4a64f543 | 506 | greater than starting address. */ |
c906108c SS |
507 | |
508 | if (BLOCK_END (block) < BLOCK_START (block)) | |
509 | { | |
510 | if (symbol) | |
511 | { | |
b98664d3 | 512 | complaint (_("block end address less than block " |
3e43a32a | 513 | "start address in %s (patched it)"), |
de5ad195 | 514 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
515 | } |
516 | else | |
517 | { | |
b98664d3 | 518 | complaint (_("block end address %s less than block " |
3e43a32a | 519 | "start address %s (patched it)"), |
5af949e3 UW |
520 | paddress (gdbarch, BLOCK_END (block)), |
521 | paddress (gdbarch, BLOCK_START (block))); | |
c906108c | 522 | } |
4a64f543 | 523 | /* Better than nothing. */ |
c906108c SS |
524 | BLOCK_END (block) = BLOCK_START (block); |
525 | } | |
c906108c SS |
526 | |
527 | /* Install this block as the superblock of all blocks made since the | |
528 | start of this scope that don't have superblocks yet. */ | |
529 | ||
530 | opblock = NULL; | |
c0219d42 MS |
531 | for (pblock = pending_blocks; |
532 | pblock && pblock != old_blocks; | |
533 | pblock = pblock->next) | |
c906108c SS |
534 | { |
535 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) | |
536 | { | |
c906108c | 537 | /* Check to be sure the blocks are nested as we receive |
4a64f543 | 538 | them. If the compiler/assembler/linker work, this just |
14711c82 DJ |
539 | burns a small amount of time. |
540 | ||
541 | Skip blocks which correspond to a function; they're not | |
542 | physically nested inside this other blocks, only | |
543 | lexically nested. */ | |
544 | if (BLOCK_FUNCTION (pblock->block) == NULL | |
545 | && (BLOCK_START (pblock->block) < BLOCK_START (block) | |
546 | || BLOCK_END (pblock->block) > BLOCK_END (block))) | |
c906108c SS |
547 | { |
548 | if (symbol) | |
549 | { | |
b98664d3 | 550 | complaint (_("inner block not inside outer block in %s"), |
de5ad195 | 551 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
552 | } |
553 | else | |
554 | { | |
b98664d3 | 555 | complaint (_("inner block (%s-%s) not " |
3e43a32a | 556 | "inside outer block (%s-%s)"), |
5af949e3 UW |
557 | paddress (gdbarch, BLOCK_START (pblock->block)), |
558 | paddress (gdbarch, BLOCK_END (pblock->block)), | |
559 | paddress (gdbarch, BLOCK_START (block)), | |
560 | paddress (gdbarch, BLOCK_END (block))); | |
c906108c SS |
561 | } |
562 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) | |
563 | BLOCK_START (pblock->block) = BLOCK_START (block); | |
564 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) | |
565 | BLOCK_END (pblock->block) = BLOCK_END (block); | |
566 | } | |
c906108c SS |
567 | BLOCK_SUPERBLOCK (pblock->block) = block; |
568 | } | |
569 | opblock = pblock; | |
570 | } | |
571 | ||
22cee43f PMR |
572 | block_set_using (block, |
573 | (is_global | |
574 | ? global_using_directives | |
575 | : local_using_directives), | |
576 | &objfile->objfile_obstack); | |
577 | if (is_global) | |
578 | global_using_directives = NULL; | |
579 | else | |
580 | local_using_directives = NULL; | |
27aa8d6a | 581 | |
c906108c | 582 | record_pending_block (objfile, block, opblock); |
801e3a5b JB |
583 | |
584 | return block; | |
c906108c SS |
585 | } |
586 | ||
84a146c9 | 587 | struct block * |
63e43d3a PMR |
588 | finish_block (struct symbol *symbol, |
589 | struct pending **listhead, | |
84a146c9 | 590 | struct pending_block *old_blocks, |
63e43d3a | 591 | const struct dynamic_prop *static_link, |
4d663531 | 592 | CORE_ADDR start, CORE_ADDR end) |
84a146c9 | 593 | { |
63e43d3a | 594 | return finish_block_internal (symbol, listhead, old_blocks, static_link, |
4d663531 | 595 | start, end, 0, 0); |
84a146c9 | 596 | } |
de4f826b | 597 | |
c906108c SS |
598 | /* Record BLOCK on the list of all blocks in the file. Put it after |
599 | OPBLOCK, or at the beginning if opblock is NULL. This puts the | |
600 | block in the list after all its subblocks. | |
601 | ||
4a146b47 | 602 | Allocate the pending block struct in the objfile_obstack to save |
c906108c SS |
603 | time. This wastes a little space. FIXME: Is it worth it? */ |
604 | ||
0b49e518 | 605 | static void |
c906108c SS |
606 | record_pending_block (struct objfile *objfile, struct block *block, |
607 | struct pending_block *opblock) | |
608 | { | |
52f0bd74 | 609 | struct pending_block *pblock; |
c906108c | 610 | |
93eed41f TT |
611 | if (pending_blocks == NULL) |
612 | obstack_init (&pending_block_obstack); | |
613 | ||
8d749320 | 614 | pblock = XOBNEW (&pending_block_obstack, struct pending_block); |
c906108c SS |
615 | pblock->block = block; |
616 | if (opblock) | |
617 | { | |
618 | pblock->next = opblock->next; | |
619 | opblock->next = pblock; | |
620 | } | |
621 | else | |
622 | { | |
623 | pblock->next = pending_blocks; | |
624 | pending_blocks = pblock; | |
625 | } | |
626 | } | |
627 | ||
801e3a5b JB |
628 | |
629 | /* Record that the range of addresses from START to END_INCLUSIVE | |
630 | (inclusive, like it says) belongs to BLOCK. BLOCK's start and end | |
631 | addresses must be set already. You must apply this function to all | |
632 | BLOCK's children before applying it to BLOCK. | |
633 | ||
634 | If a call to this function complicates the picture beyond that | |
635 | already provided by BLOCK_START and BLOCK_END, then we create an | |
636 | address map for the block. */ | |
637 | void | |
638 | record_block_range (struct block *block, | |
639 | CORE_ADDR start, CORE_ADDR end_inclusive) | |
640 | { | |
641 | /* If this is any different from the range recorded in the block's | |
642 | own BLOCK_START and BLOCK_END, then note that the address map has | |
643 | become interesting. Note that even if this block doesn't have | |
644 | any "interesting" ranges, some later block might, so we still | |
645 | need to record this block in the addrmap. */ | |
646 | if (start != BLOCK_START (block) | |
647 | || end_inclusive + 1 != BLOCK_END (block)) | |
648 | pending_addrmap_interesting = 1; | |
649 | ||
650 | if (! pending_addrmap) | |
651 | { | |
652 | obstack_init (&pending_addrmap_obstack); | |
653 | pending_addrmap = addrmap_create_mutable (&pending_addrmap_obstack); | |
654 | } | |
655 | ||
656 | addrmap_set_empty (pending_addrmap, start, end_inclusive, block); | |
657 | } | |
658 | ||
822e978b | 659 | static struct blockvector * |
43f3e411 | 660 | make_blockvector (void) |
c906108c | 661 | { |
43f3e411 | 662 | struct objfile *objfile = buildsym_compunit->objfile; |
52f0bd74 AC |
663 | struct pending_block *next; |
664 | struct blockvector *blockvector; | |
665 | int i; | |
c906108c SS |
666 | |
667 | /* Count the length of the list of blocks. */ | |
668 | ||
669 | for (next = pending_blocks, i = 0; next; next = next->next, i++) | |
670 | {; | |
671 | } | |
672 | ||
673 | blockvector = (struct blockvector *) | |
4a146b47 | 674 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
675 | (sizeof (struct blockvector) |
676 | + (i - 1) * sizeof (struct block *))); | |
677 | ||
4a64f543 | 678 | /* Copy the blocks into the blockvector. This is done in reverse |
c906108c | 679 | order, which happens to put the blocks into the proper order |
4a64f543 | 680 | (ascending starting address). finish_block has hair to insert |
c906108c SS |
681 | each block into the list after its subblocks in order to make |
682 | sure this is true. */ | |
683 | ||
684 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
685 | for (next = pending_blocks; next; next = next->next) | |
686 | { | |
687 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
688 | } | |
689 | ||
89ba75b1 | 690 | free_pending_blocks (); |
c906108c | 691 | |
801e3a5b JB |
692 | /* If we needed an address map for this symtab, record it in the |
693 | blockvector. */ | |
694 | if (pending_addrmap && pending_addrmap_interesting) | |
695 | BLOCKVECTOR_MAP (blockvector) | |
696 | = addrmap_create_fixed (pending_addrmap, &objfile->objfile_obstack); | |
697 | else | |
698 | BLOCKVECTOR_MAP (blockvector) = 0; | |
4aad0dfc | 699 | |
c906108c | 700 | /* Some compilers output blocks in the wrong order, but we depend on |
4a64f543 | 701 | their being in the right order so we can binary search. Check the |
4aad0dfc DE |
702 | order and moan about it. |
703 | Note: Remember that the first two blocks are the global and static | |
704 | blocks. We could special case that fact and begin checking at block 2. | |
705 | To avoid making that assumption we do not. */ | |
c906108c SS |
706 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) |
707 | { | |
708 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) | |
709 | { | |
710 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) | |
711 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) | |
712 | { | |
59527da0 JB |
713 | CORE_ADDR start |
714 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); | |
c906108c | 715 | |
b98664d3 | 716 | complaint (_("block at %s out of order"), |
bb599908 | 717 | hex_string ((LONGEST) start)); |
c906108c SS |
718 | } |
719 | } | |
720 | } | |
c906108c SS |
721 | |
722 | return (blockvector); | |
723 | } | |
724 | \f | |
725 | /* Start recording information about source code that came from an | |
726 | included (or otherwise merged-in) source file with a different | |
4d663531 | 727 | name. NAME is the name of the file (cannot be NULL). */ |
c906108c SS |
728 | |
729 | void | |
4d663531 | 730 | start_subfile (const char *name) |
c906108c | 731 | { |
43f3e411 | 732 | const char *subfile_dirname; |
52f0bd74 | 733 | struct subfile *subfile; |
c906108c | 734 | |
43f3e411 DE |
735 | gdb_assert (buildsym_compunit != NULL); |
736 | ||
905eb0e2 | 737 | subfile_dirname = buildsym_compunit->comp_dir.get (); |
c906108c | 738 | |
43f3e411 DE |
739 | /* See if this subfile is already registered. */ |
740 | ||
741 | for (subfile = buildsym_compunit->subfiles; subfile; subfile = subfile->next) | |
c906108c | 742 | { |
84ba0adf DJ |
743 | char *subfile_name; |
744 | ||
745 | /* If NAME is an absolute path, and this subfile is not, then | |
746 | attempt to create an absolute path to compare. */ | |
747 | if (IS_ABSOLUTE_PATH (name) | |
748 | && !IS_ABSOLUTE_PATH (subfile->name) | |
43f3e411 DE |
749 | && subfile_dirname != NULL) |
750 | subfile_name = concat (subfile_dirname, SLASH_STRING, | |
6eb7ee03 | 751 | subfile->name, (char *) NULL); |
84ba0adf DJ |
752 | else |
753 | subfile_name = subfile->name; | |
754 | ||
755 | if (FILENAME_CMP (subfile_name, name) == 0) | |
c906108c SS |
756 | { |
757 | current_subfile = subfile; | |
84ba0adf DJ |
758 | if (subfile_name != subfile->name) |
759 | xfree (subfile_name); | |
c906108c SS |
760 | return; |
761 | } | |
84ba0adf DJ |
762 | if (subfile_name != subfile->name) |
763 | xfree (subfile_name); | |
c906108c SS |
764 | } |
765 | ||
43f3e411 | 766 | /* This subfile is not known. Add an entry for it. */ |
c906108c | 767 | |
8d749320 | 768 | subfile = XNEW (struct subfile); |
43f3e411 DE |
769 | memset (subfile, 0, sizeof (struct subfile)); |
770 | subfile->buildsym_compunit = buildsym_compunit; | |
771 | ||
772 | subfile->next = buildsym_compunit->subfiles; | |
773 | buildsym_compunit->subfiles = subfile; | |
774 | ||
c906108c SS |
775 | current_subfile = subfile; |
776 | ||
b74db436 | 777 | subfile->name = xstrdup (name); |
c906108c SS |
778 | |
779 | /* Initialize line-number recording for this subfile. */ | |
780 | subfile->line_vector = NULL; | |
781 | ||
782 | /* Default the source language to whatever can be deduced from the | |
783 | filename. If nothing can be deduced (such as for a C/C++ include | |
784 | file with a ".h" extension), then inherit whatever language the | |
785 | previous subfile had. This kludgery is necessary because there | |
786 | is no standard way in some object formats to record the source | |
787 | language. Also, when symtabs are allocated we try to deduce a | |
788 | language then as well, but it is too late for us to use that | |
789 | information while reading symbols, since symtabs aren't allocated | |
790 | until after all the symbols have been processed for a given | |
4a64f543 | 791 | source file. */ |
c906108c SS |
792 | |
793 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
794 | if (subfile->language == language_unknown |
795 | && subfile->next != NULL) | |
c906108c SS |
796 | { |
797 | subfile->language = subfile->next->language; | |
798 | } | |
799 | ||
25caa7a8 | 800 | /* If the filename of this subfile ends in .C, then change the |
c906108c | 801 | language of any pending subfiles from C to C++. We also accept |
25caa7a8 | 802 | any other C++ suffixes accepted by deduce_language_from_filename. */ |
c906108c SS |
803 | /* Likewise for f2c. */ |
804 | ||
805 | if (subfile->name) | |
806 | { | |
807 | struct subfile *s; | |
808 | enum language sublang = deduce_language_from_filename (subfile->name); | |
809 | ||
810 | if (sublang == language_cplus || sublang == language_fortran) | |
43f3e411 | 811 | for (s = buildsym_compunit->subfiles; s != NULL; s = s->next) |
c906108c SS |
812 | if (s->language == language_c) |
813 | s->language = sublang; | |
814 | } | |
815 | ||
816 | /* And patch up this file if necessary. */ | |
817 | if (subfile->language == language_c | |
818 | && subfile->next != NULL | |
819 | && (subfile->next->language == language_cplus | |
820 | || subfile->next->language == language_fortran)) | |
821 | { | |
822 | subfile->language = subfile->next->language; | |
823 | } | |
824 | } | |
825 | ||
43f3e411 | 826 | /* Delete the buildsym compunit. */ |
7bab9b58 DE |
827 | |
828 | static void | |
43f3e411 | 829 | free_buildsym_compunit (void) |
7bab9b58 | 830 | { |
43f3e411 DE |
831 | if (buildsym_compunit == NULL) |
832 | return; | |
b248663f | 833 | delete buildsym_compunit; |
43f3e411 | 834 | buildsym_compunit = NULL; |
0ab9ce85 | 835 | current_subfile = NULL; |
7bab9b58 DE |
836 | } |
837 | ||
c906108c SS |
838 | /* For stabs readers, the first N_SO symbol is assumed to be the |
839 | source file name, and the subfile struct is initialized using that | |
840 | assumption. If another N_SO symbol is later seen, immediately | |
841 | following the first one, then the first one is assumed to be the | |
842 | directory name and the second one is really the source file name. | |
843 | ||
844 | So we have to patch up the subfile struct by moving the old name | |
845 | value to dirname and remembering the new name. Some sanity | |
846 | checking is performed to ensure that the state of the subfile | |
847 | struct is reasonable and that the old name we are assuming to be a | |
4a64f543 | 848 | directory name actually is (by checking for a trailing '/'). */ |
c906108c SS |
849 | |
850 | void | |
a121b7c1 | 851 | patch_subfile_names (struct subfile *subfile, const char *name) |
c906108c | 852 | { |
43f3e411 DE |
853 | if (subfile != NULL |
854 | && buildsym_compunit->comp_dir == NULL | |
855 | && subfile->name != NULL | |
0ba1096a | 856 | && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1])) |
c906108c | 857 | { |
905eb0e2 | 858 | buildsym_compunit->comp_dir.reset (subfile->name); |
1b36a34b | 859 | subfile->name = xstrdup (name); |
46212e0b | 860 | set_last_source_file (name); |
c906108c SS |
861 | |
862 | /* Default the source language to whatever can be deduced from | |
863 | the filename. If nothing can be deduced (such as for a C/C++ | |
864 | include file with a ".h" extension), then inherit whatever | |
865 | language the previous subfile had. This kludgery is | |
866 | necessary because there is no standard way in some object | |
867 | formats to record the source language. Also, when symtabs | |
868 | are allocated we try to deduce a language then as well, but | |
869 | it is too late for us to use that information while reading | |
870 | symbols, since symtabs aren't allocated until after all the | |
4a64f543 | 871 | symbols have been processed for a given source file. */ |
c906108c SS |
872 | |
873 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
874 | if (subfile->language == language_unknown |
875 | && subfile->next != NULL) | |
c906108c SS |
876 | { |
877 | subfile->language = subfile->next->language; | |
878 | } | |
879 | } | |
880 | } | |
881 | \f | |
882 | /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for | |
883 | switching source files (different subfiles, as we call them) within | |
884 | one object file, but using a stack rather than in an arbitrary | |
885 | order. */ | |
886 | ||
887 | void | |
888 | push_subfile (void) | |
889 | { | |
8d749320 | 890 | struct subfile_stack *tem = XNEW (struct subfile_stack); |
c906108c SS |
891 | |
892 | tem->next = subfile_stack; | |
893 | subfile_stack = tem; | |
894 | if (current_subfile == NULL || current_subfile->name == NULL) | |
895 | { | |
4a64f543 MS |
896 | internal_error (__FILE__, __LINE__, |
897 | _("failed internal consistency check")); | |
c906108c SS |
898 | } |
899 | tem->name = current_subfile->name; | |
900 | } | |
901 | ||
902 | char * | |
903 | pop_subfile (void) | |
904 | { | |
52f0bd74 AC |
905 | char *name; |
906 | struct subfile_stack *link = subfile_stack; | |
c906108c SS |
907 | |
908 | if (link == NULL) | |
909 | { | |
3e43a32a MS |
910 | internal_error (__FILE__, __LINE__, |
911 | _("failed internal consistency check")); | |
c906108c SS |
912 | } |
913 | name = link->name; | |
914 | subfile_stack = link->next; | |
b8c9b27d | 915 | xfree ((void *) link); |
c906108c SS |
916 | return (name); |
917 | } | |
918 | \f | |
919 | /* Add a linetable entry for line number LINE and address PC to the | |
920 | line vector for SUBFILE. */ | |
921 | ||
922 | void | |
aa1ee363 | 923 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
c906108c SS |
924 | { |
925 | struct linetable_entry *e; | |
c906108c | 926 | |
cc59ec59 | 927 | /* Ignore the dummy line number in libg.o */ |
c906108c SS |
928 | if (line == 0xffff) |
929 | { | |
930 | return; | |
931 | } | |
932 | ||
933 | /* Make sure line vector exists and is big enough. */ | |
934 | if (!subfile->line_vector) | |
935 | { | |
936 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; | |
937 | subfile->line_vector = (struct linetable *) | |
938 | xmalloc (sizeof (struct linetable) | |
c5aa993b | 939 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
c906108c | 940 | subfile->line_vector->nitems = 0; |
530fedbc | 941 | buildsym_compunit->m_have_line_numbers = true; |
c906108c SS |
942 | } |
943 | ||
944 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) | |
945 | { | |
946 | subfile->line_vector_length *= 2; | |
947 | subfile->line_vector = (struct linetable *) | |
948 | xrealloc ((char *) subfile->line_vector, | |
949 | (sizeof (struct linetable) | |
950 | + (subfile->line_vector_length | |
951 | * sizeof (struct linetable_entry)))); | |
952 | } | |
953 | ||
607ae575 DJ |
954 | /* Normally, we treat lines as unsorted. But the end of sequence |
955 | marker is special. We sort line markers at the same PC by line | |
956 | number, so end of sequence markers (which have line == 0) appear | |
957 | first. This is right if the marker ends the previous function, | |
958 | and there is no padding before the next function. But it is | |
959 | wrong if the previous line was empty and we are now marking a | |
960 | switch to a different subfile. We must leave the end of sequence | |
961 | marker at the end of this group of lines, not sort the empty line | |
962 | to after the marker. The easiest way to accomplish this is to | |
963 | delete any empty lines from our table, if they are followed by | |
964 | end of sequence markers. All we lose is the ability to set | |
965 | breakpoints at some lines which contain no instructions | |
966 | anyway. */ | |
967 | if (line == 0 && subfile->line_vector->nitems > 0) | |
968 | { | |
969 | e = subfile->line_vector->item + subfile->line_vector->nitems - 1; | |
970 | while (subfile->line_vector->nitems > 0 && e->pc == pc) | |
971 | { | |
972 | e--; | |
973 | subfile->line_vector->nitems--; | |
974 | } | |
975 | } | |
976 | ||
c906108c SS |
977 | e = subfile->line_vector->item + subfile->line_vector->nitems++; |
978 | e->line = line; | |
607ae575 | 979 | e->pc = pc; |
c906108c SS |
980 | } |
981 | ||
982 | /* Needed in order to sort line tables from IBM xcoff files. Sigh! */ | |
983 | ||
984 | static int | |
985 | compare_line_numbers (const void *ln1p, const void *ln2p) | |
986 | { | |
987 | struct linetable_entry *ln1 = (struct linetable_entry *) ln1p; | |
988 | struct linetable_entry *ln2 = (struct linetable_entry *) ln2p; | |
989 | ||
990 | /* Note: this code does not assume that CORE_ADDRs can fit in ints. | |
991 | Please keep it that way. */ | |
992 | if (ln1->pc < ln2->pc) | |
993 | return -1; | |
994 | ||
995 | if (ln1->pc > ln2->pc) | |
996 | return 1; | |
997 | ||
998 | /* If pc equal, sort by line. I'm not sure whether this is optimum | |
999 | behavior (see comment at struct linetable in symtab.h). */ | |
1000 | return ln1->line - ln2->line; | |
1001 | } | |
1002 | \f | |
43f3e411 DE |
1003 | /* See buildsym.h. */ |
1004 | ||
1005 | struct compunit_symtab * | |
1006 | buildsym_compunit_symtab (void) | |
1007 | { | |
1008 | gdb_assert (buildsym_compunit != NULL); | |
1009 | ||
1010 | return buildsym_compunit->compunit_symtab; | |
1011 | } | |
1012 | ||
1013 | /* See buildsym.h. */ | |
fc474241 DE |
1014 | |
1015 | struct macro_table * | |
43f3e411 | 1016 | get_macro_table (void) |
fc474241 | 1017 | { |
43f3e411 DE |
1018 | struct objfile *objfile; |
1019 | ||
1020 | gdb_assert (buildsym_compunit != NULL); | |
6a976300 | 1021 | return buildsym_compunit->get_macro_table (); |
fc474241 DE |
1022 | } |
1023 | \f | |
0ab9ce85 DE |
1024 | /* Init state to prepare for building a symtab. |
1025 | Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c | |
1026 | can call start_symtab+end_symtab multiple times after one call to | |
1027 | buildsym_init. */ | |
1028 | ||
1029 | static void | |
2c99ee5c | 1030 | prepare_for_building () |
0ab9ce85 | 1031 | { |
0ab9ce85 | 1032 | local_symbols = NULL; |
22cee43f | 1033 | local_using_directives = NULL; |
0ab9ce85 DE |
1034 | |
1035 | context_stack_depth = 0; | |
1036 | ||
1037 | /* These should have been reset either by successful completion of building | |
33c7c59d | 1038 | a symtab, or by the scoped_free_pendings destructor. */ |
0ab9ce85 DE |
1039 | gdb_assert (file_symbols == NULL); |
1040 | gdb_assert (global_symbols == NULL); | |
22cee43f | 1041 | gdb_assert (global_using_directives == NULL); |
0ab9ce85 DE |
1042 | gdb_assert (pending_addrmap == NULL); |
1043 | gdb_assert (current_subfile == NULL); | |
e62cca7c | 1044 | gdb_assert (buildsym_compunit == nullptr); |
0ab9ce85 DE |
1045 | } |
1046 | ||
4d663531 | 1047 | /* Start a new symtab for a new source file in OBJFILE. Called, for example, |
c906108c SS |
1048 | when a stabs symbol of type N_SO is seen, or when a DWARF |
1049 | TAG_compile_unit DIE is seen. It indicates the start of data for | |
0b0287a1 DE |
1050 | one original source file. |
1051 | ||
5ffa0793 PA |
1052 | NAME is the name of the file (cannot be NULL). COMP_DIR is the |
1053 | directory in which the file was compiled (or NULL if not known). | |
1054 | START_ADDR is the lowest address of objects in the file (or 0 if | |
1055 | not known). LANGUAGE is the language of the source file, or | |
1056 | language_unknown if not known, in which case it'll be deduced from | |
1057 | the filename. */ | |
c906108c | 1058 | |
43f3e411 | 1059 | struct compunit_symtab * |
4d663531 | 1060 | start_symtab (struct objfile *objfile, const char *name, const char *comp_dir, |
5ffa0793 | 1061 | CORE_ADDR start_addr, enum language language) |
c906108c | 1062 | { |
2c99ee5c | 1063 | prepare_for_building (); |
43f3e411 | 1064 | |
c0015d44 | 1065 | buildsym_compunit = new struct buildsym_compunit (objfile, name, comp_dir, |
2c99ee5c | 1066 | language, start_addr); |
43f3e411 | 1067 | |
0ab9ce85 | 1068 | /* Allocate the compunit symtab now. The caller needs it to allocate |
43f3e411 DE |
1069 | non-primary symtabs. It is also needed by get_macro_table. */ |
1070 | buildsym_compunit->compunit_symtab = allocate_compunit_symtab (objfile, | |
1071 | name); | |
1072 | ||
1073 | /* Build the subfile for NAME (the main source file) so that we can record | |
1074 | a pointer to it for later. | |
1075 | IMPORTANT: Do not allocate a struct symtab for NAME here. | |
1076 | It can happen that the debug info provides a different path to NAME than | |
1077 | DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but | |
1078 | that only works if the main_subfile doesn't have a symtab yet. */ | |
4d663531 | 1079 | start_subfile (name); |
7bab9b58 DE |
1080 | /* Save this so that we don't have to go looking for it at the end |
1081 | of the subfiles list. */ | |
43f3e411 DE |
1082 | buildsym_compunit->main_subfile = current_subfile; |
1083 | ||
43f3e411 | 1084 | return buildsym_compunit->compunit_symtab; |
6d30eef8 DE |
1085 | } |
1086 | ||
1087 | /* Restart compilation for a symtab. | |
0ab9ce85 DE |
1088 | CUST is the result of end_expandable_symtab. |
1089 | NAME, START_ADDR are the source file we are resuming with. | |
1090 | ||
6d30eef8 | 1091 | This is used when a symtab is built from multiple sources. |
0ab9ce85 DE |
1092 | The symtab is first built with start_symtab/end_expandable_symtab |
1093 | and then for each additional piece call restart_symtab/augment_*_symtab. | |
1094 | Note: At the moment there is only augment_type_symtab. */ | |
6d30eef8 DE |
1095 | |
1096 | void | |
0ab9ce85 DE |
1097 | restart_symtab (struct compunit_symtab *cust, |
1098 | const char *name, CORE_ADDR start_addr) | |
6d30eef8 | 1099 | { |
2c99ee5c | 1100 | prepare_for_building (); |
c906108c | 1101 | |
b248663f TT |
1102 | buildsym_compunit |
1103 | = new struct buildsym_compunit (COMPUNIT_OBJFILE (cust), | |
c0015d44 | 1104 | name, |
b248663f | 1105 | COMPUNIT_DIRNAME (cust), |
2c99ee5c TT |
1106 | compunit_language (cust), |
1107 | start_addr); | |
0ab9ce85 | 1108 | buildsym_compunit->compunit_symtab = cust; |
c906108c SS |
1109 | } |
1110 | ||
4a64f543 MS |
1111 | /* Subroutine of end_symtab to simplify it. Look for a subfile that |
1112 | matches the main source file's basename. If there is only one, and | |
1113 | if the main source file doesn't have any symbol or line number | |
1114 | information, then copy this file's symtab and line_vector to the | |
1115 | main source file's subfile and discard the other subfile. This can | |
1116 | happen because of a compiler bug or from the user playing games | |
1117 | with #line or from things like a distributed build system that | |
43f3e411 DE |
1118 | manipulates the debug info. This can also happen from an innocent |
1119 | symlink in the paths, we don't canonicalize paths here. */ | |
4584e32e DE |
1120 | |
1121 | static void | |
1122 | watch_main_source_file_lossage (void) | |
1123 | { | |
43f3e411 | 1124 | struct subfile *mainsub, *subfile; |
4584e32e | 1125 | |
43f3e411 | 1126 | /* We have to watch for buildsym_compunit == NULL here. It's a quirk of |
7bab9b58 | 1127 | end_symtab, it can return NULL so there may not be a main subfile. */ |
43f3e411 | 1128 | if (buildsym_compunit == NULL) |
7bab9b58 | 1129 | return; |
4584e32e | 1130 | |
43f3e411 DE |
1131 | /* Get the main source file. */ |
1132 | mainsub = buildsym_compunit->main_subfile; | |
1133 | ||
4a64f543 | 1134 | /* If the main source file doesn't have any line number or symbol |
7bab9b58 | 1135 | info, look for an alias in another subfile. */ |
4584e32e | 1136 | |
43f3e411 DE |
1137 | if (mainsub->line_vector == NULL |
1138 | && mainsub->symtab == NULL) | |
4584e32e | 1139 | { |
43f3e411 | 1140 | const char *mainbase = lbasename (mainsub->name); |
4584e32e DE |
1141 | int nr_matches = 0; |
1142 | struct subfile *prevsub; | |
1143 | struct subfile *mainsub_alias = NULL; | |
1144 | struct subfile *prev_mainsub_alias = NULL; | |
1145 | ||
1146 | prevsub = NULL; | |
43f3e411 DE |
1147 | for (subfile = buildsym_compunit->subfiles; |
1148 | subfile != NULL; | |
4584e32e DE |
1149 | subfile = subfile->next) |
1150 | { | |
43f3e411 DE |
1151 | if (subfile == mainsub) |
1152 | continue; | |
0ba1096a | 1153 | if (filename_cmp (lbasename (subfile->name), mainbase) == 0) |
4584e32e DE |
1154 | { |
1155 | ++nr_matches; | |
1156 | mainsub_alias = subfile; | |
1157 | prev_mainsub_alias = prevsub; | |
1158 | } | |
1159 | prevsub = subfile; | |
1160 | } | |
1161 | ||
1162 | if (nr_matches == 1) | |
1163 | { | |
43f3e411 | 1164 | gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub); |
4584e32e DE |
1165 | |
1166 | /* Found a match for the main source file. | |
1167 | Copy its line_vector and symtab to the main subfile | |
1168 | and then discard it. */ | |
1169 | ||
43f3e411 DE |
1170 | mainsub->line_vector = mainsub_alias->line_vector; |
1171 | mainsub->line_vector_length = mainsub_alias->line_vector_length; | |
1172 | mainsub->symtab = mainsub_alias->symtab; | |
4584e32e DE |
1173 | |
1174 | if (prev_mainsub_alias == NULL) | |
43f3e411 | 1175 | buildsym_compunit->subfiles = mainsub_alias->next; |
4584e32e DE |
1176 | else |
1177 | prev_mainsub_alias->next = mainsub_alias->next; | |
98387a29 | 1178 | xfree (mainsub_alias->name); |
4584e32e DE |
1179 | xfree (mainsub_alias); |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
0ab9ce85 DE |
1184 | /* Reset state after a successful building of a symtab. |
1185 | This exists because dbxread.c and xcoffread.c can call | |
1186 | start_symtab+end_symtab multiple times after one call to buildsym_init, | |
33c7c59d | 1187 | and before the scoped_free_pendings destructor is called. |
0ab9ce85 | 1188 | We keep the free_pendings list around for dbx/xcoff sake. */ |
6d30eef8 DE |
1189 | |
1190 | static void | |
1191 | reset_symtab_globals (void) | |
1192 | { | |
0ab9ce85 | 1193 | local_symbols = NULL; |
22cee43f | 1194 | local_using_directives = NULL; |
0ab9ce85 DE |
1195 | file_symbols = NULL; |
1196 | global_symbols = NULL; | |
22cee43f | 1197 | global_using_directives = NULL; |
0ab9ce85 | 1198 | |
6d30eef8 | 1199 | if (pending_addrmap) |
0ab9ce85 DE |
1200 | obstack_free (&pending_addrmap_obstack, NULL); |
1201 | pending_addrmap = NULL; | |
1202 | ||
1203 | free_buildsym_compunit (); | |
6d30eef8 DE |
1204 | } |
1205 | ||
4359dff1 JK |
1206 | /* Implementation of the first part of end_symtab. It allows modifying |
1207 | STATIC_BLOCK before it gets finalized by end_symtab_from_static_block. | |
1208 | If the returned value is NULL there is no blockvector created for | |
1209 | this symtab (you still must call end_symtab_from_static_block). | |
c906108c | 1210 | |
4359dff1 JK |
1211 | END_ADDR is the same as for end_symtab: the address of the end of the |
1212 | file's text. | |
c906108c | 1213 | |
4359dff1 | 1214 | If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made |
36586728 TT |
1215 | expandable. |
1216 | ||
1217 | If REQUIRED is non-zero, then a symtab is created even if it does | |
1218 | not contain any symbols. */ | |
6d30eef8 | 1219 | |
4359dff1 | 1220 | struct block * |
4d663531 | 1221 | end_symtab_get_static_block (CORE_ADDR end_addr, int expandable, int required) |
c906108c | 1222 | { |
43f3e411 | 1223 | struct objfile *objfile = buildsym_compunit->objfile; |
4d663531 | 1224 | |
c906108c SS |
1225 | /* Finish the lexical context of the last function in the file; pop |
1226 | the context stack. */ | |
1227 | ||
1228 | if (context_stack_depth > 0) | |
1229 | { | |
4359dff1 JK |
1230 | struct context_stack *cstk = pop_context (); |
1231 | ||
c906108c | 1232 | /* Make a block for the local symbols within. */ |
63e43d3a | 1233 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, NULL, |
4d663531 | 1234 | cstk->start_addr, end_addr); |
c906108c SS |
1235 | |
1236 | if (context_stack_depth > 0) | |
1237 | { | |
1238 | /* This is said to happen with SCO. The old coffread.c | |
1239 | code simply emptied the context stack, so we do the | |
1240 | same. FIXME: Find out why it is happening. This is not | |
1241 | believed to happen in most cases (even for coffread.c); | |
1242 | it used to be an abort(). */ | |
b98664d3 | 1243 | complaint (_("Context stack not empty in end_symtab")); |
c906108c SS |
1244 | context_stack_depth = 0; |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /* Reordered executables may have out of order pending blocks; if | |
1249 | OBJF_REORDERED is true, then sort the pending blocks. */ | |
6d30eef8 | 1250 | |
c906108c SS |
1251 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) |
1252 | { | |
07e7f39f | 1253 | struct pending_block *pb; |
c906108c | 1254 | |
b05628f0 | 1255 | std::vector<block *> barray; |
c906108c | 1256 | |
07e7f39f | 1257 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1258 | barray.push_back (pb->block); |
07e7f39f | 1259 | |
5033013f UW |
1260 | /* Sort blocks by start address in descending order. Blocks with the |
1261 | same start address must remain in the original order to preserve | |
1262 | inline function caller/callee relationships. */ | |
1263 | std::stable_sort (barray.begin (), barray.end (), | |
1264 | [] (const block *a, const block *b) | |
1265 | { | |
1266 | return BLOCK_START (a) > BLOCK_START (b); | |
1267 | }); | |
07e7f39f | 1268 | |
b05628f0 | 1269 | int i = 0; |
07e7f39f | 1270 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1271 | pb->block = barray[i++]; |
c906108c SS |
1272 | } |
1273 | ||
1274 | /* Cleanup any undefined types that have been left hanging around | |
1275 | (this needs to be done before the finish_blocks so that | |
1276 | file_symbols is still good). | |
c5aa993b | 1277 | |
0a0edcd5 | 1278 | Both cleanup_undefined_stabs_types and finish_global_stabs are stabs |
c906108c SS |
1279 | specific, but harmless for other symbol readers, since on gdb |
1280 | startup or when finished reading stabs, the state is set so these | |
1281 | are no-ops. FIXME: Is this handled right in case of QUIT? Can | |
1282 | we make this cleaner? */ | |
1283 | ||
0a0edcd5 | 1284 | cleanup_undefined_stabs_types (objfile); |
c906108c SS |
1285 | finish_global_stabs (objfile); |
1286 | ||
36586728 TT |
1287 | if (!required |
1288 | && pending_blocks == NULL | |
c906108c SS |
1289 | && file_symbols == NULL |
1290 | && global_symbols == NULL | |
530fedbc | 1291 | && !buildsym_compunit->m_have_line_numbers |
6a976300 | 1292 | && buildsym_compunit->m_pending_macros == NULL |
22cee43f | 1293 | && global_using_directives == NULL) |
c906108c | 1294 | { |
4359dff1 JK |
1295 | /* Ignore symtabs that have no functions with real debugging info. */ |
1296 | return NULL; | |
1297 | } | |
1298 | else | |
1299 | { | |
1300 | /* Define the STATIC_BLOCK. */ | |
63e43d3a | 1301 | return finish_block_internal (NULL, &file_symbols, NULL, NULL, |
2c99ee5c TT |
1302 | buildsym_compunit->m_last_source_start_addr, |
1303 | end_addr, 0, expandable); | |
4359dff1 JK |
1304 | } |
1305 | } | |
1306 | ||
7bab9b58 DE |
1307 | /* Subroutine of end_symtab_from_static_block to simplify it. |
1308 | Handle the "have blockvector" case. | |
1309 | See end_symtab_from_static_block for a description of the arguments. */ | |
1310 | ||
43f3e411 | 1311 | static struct compunit_symtab * |
7bab9b58 | 1312 | end_symtab_with_blockvector (struct block *static_block, |
4d663531 | 1313 | int section, int expandable) |
4359dff1 | 1314 | { |
43f3e411 DE |
1315 | struct objfile *objfile = buildsym_compunit->objfile; |
1316 | struct compunit_symtab *cu = buildsym_compunit->compunit_symtab; | |
7bab9b58 | 1317 | struct symtab *symtab; |
4359dff1 JK |
1318 | struct blockvector *blockvector; |
1319 | struct subfile *subfile; | |
7bab9b58 | 1320 | CORE_ADDR end_addr; |
4359dff1 | 1321 | |
7bab9b58 | 1322 | gdb_assert (static_block != NULL); |
43f3e411 DE |
1323 | gdb_assert (buildsym_compunit != NULL); |
1324 | gdb_assert (buildsym_compunit->subfiles != NULL); | |
7bab9b58 DE |
1325 | |
1326 | end_addr = BLOCK_END (static_block); | |
1327 | ||
1328 | /* Create the GLOBAL_BLOCK and build the blockvector. */ | |
63e43d3a | 1329 | finish_block_internal (NULL, &global_symbols, NULL, NULL, |
2c99ee5c | 1330 | buildsym_compunit->m_last_source_start_addr, end_addr, |
7bab9b58 | 1331 | 1, expandable); |
43f3e411 | 1332 | blockvector = make_blockvector (); |
c906108c | 1333 | |
f56ce883 DE |
1334 | /* Read the line table if it has to be read separately. |
1335 | This is only used by xcoffread.c. */ | |
c295b2e5 | 1336 | if (objfile->sf->sym_read_linetable != NULL) |
f56ce883 | 1337 | objfile->sf->sym_read_linetable (objfile); |
c906108c | 1338 | |
4584e32e DE |
1339 | /* Handle the case where the debug info specifies a different path |
1340 | for the main source file. It can cause us to lose track of its | |
1341 | line number information. */ | |
1342 | watch_main_source_file_lossage (); | |
1343 | ||
43f3e411 DE |
1344 | /* Now create the symtab objects proper, if not already done, |
1345 | one for each subfile. */ | |
c906108c | 1346 | |
43f3e411 DE |
1347 | for (subfile = buildsym_compunit->subfiles; |
1348 | subfile != NULL; | |
1349 | subfile = subfile->next) | |
c906108c SS |
1350 | { |
1351 | int linetablesize = 0; | |
c906108c | 1352 | |
7bab9b58 | 1353 | if (subfile->line_vector) |
c906108c | 1354 | { |
7bab9b58 DE |
1355 | linetablesize = sizeof (struct linetable) + |
1356 | subfile->line_vector->nitems * sizeof (struct linetable_entry); | |
1357 | ||
1358 | /* Like the pending blocks, the line table may be | |
1359 | scrambled in reordered executables. Sort it if | |
1360 | OBJF_REORDERED is true. */ | |
1361 | if (objfile->flags & OBJF_REORDERED) | |
1362 | qsort (subfile->line_vector->item, | |
1363 | subfile->line_vector->nitems, | |
1364 | sizeof (struct linetable_entry), compare_line_numbers); | |
1365 | } | |
9182c5bc | 1366 | |
7bab9b58 DE |
1367 | /* Allocate a symbol table if necessary. */ |
1368 | if (subfile->symtab == NULL) | |
43f3e411 | 1369 | subfile->symtab = allocate_symtab (cu, subfile->name); |
7bab9b58 | 1370 | symtab = subfile->symtab; |
9182c5bc | 1371 | |
7bab9b58 | 1372 | /* Fill in its components. */ |
43f3e411 | 1373 | |
7bab9b58 DE |
1374 | if (subfile->line_vector) |
1375 | { | |
1376 | /* Reallocate the line table on the symbol obstack. */ | |
8435453b | 1377 | SYMTAB_LINETABLE (symtab) = (struct linetable *) |
7bab9b58 | 1378 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
8435453b DE |
1379 | memcpy (SYMTAB_LINETABLE (symtab), subfile->line_vector, |
1380 | linetablesize); | |
c906108c | 1381 | } |
24be086d | 1382 | else |
c906108c | 1383 | { |
8435453b | 1384 | SYMTAB_LINETABLE (symtab) = NULL; |
c906108c | 1385 | } |
c906108c | 1386 | |
7bab9b58 DE |
1387 | /* Use whatever language we have been using for this |
1388 | subfile, not the one that was deduced in allocate_symtab | |
1389 | from the filename. We already did our own deducing when | |
1390 | we created the subfile, and we may have altered our | |
1391 | opinion of what language it is from things we found in | |
1392 | the symbols. */ | |
1393 | symtab->language = subfile->language; | |
43f3e411 | 1394 | } |
c906108c | 1395 | |
43f3e411 DE |
1396 | /* Make sure the symtab of main_subfile is the first in its list. */ |
1397 | { | |
1398 | struct symtab *main_symtab, *prev_symtab; | |
1399 | ||
1400 | main_symtab = buildsym_compunit->main_subfile->symtab; | |
1401 | prev_symtab = NULL; | |
1402 | ALL_COMPUNIT_FILETABS (cu, symtab) | |
1403 | { | |
1404 | if (symtab == main_symtab) | |
1405 | { | |
1406 | if (prev_symtab != NULL) | |
1407 | { | |
1408 | prev_symtab->next = main_symtab->next; | |
1409 | main_symtab->next = COMPUNIT_FILETABS (cu); | |
1410 | COMPUNIT_FILETABS (cu) = main_symtab; | |
1411 | } | |
1412 | break; | |
1413 | } | |
1414 | prev_symtab = symtab; | |
1415 | } | |
1416 | gdb_assert (main_symtab == COMPUNIT_FILETABS (cu)); | |
1417 | } | |
84a146c9 | 1418 | |
0ab9ce85 | 1419 | /* Fill out the compunit symtab. */ |
84a146c9 | 1420 | |
43f3e411 DE |
1421 | if (buildsym_compunit->comp_dir != NULL) |
1422 | { | |
1423 | /* Reallocate the dirname on the symbol obstack. */ | |
905eb0e2 | 1424 | const char *comp_dir = buildsym_compunit->comp_dir.get (); |
43f3e411 | 1425 | COMPUNIT_DIRNAME (cu) |
224c3ddb | 1426 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
905eb0e2 | 1427 | comp_dir, strlen (comp_dir)); |
c906108c SS |
1428 | } |
1429 | ||
43f3e411 DE |
1430 | /* Save the debug format string (if any) in the symtab. */ |
1431 | COMPUNIT_DEBUGFORMAT (cu) = buildsym_compunit->debugformat; | |
1432 | ||
1433 | /* Similarly for the producer. */ | |
1434 | COMPUNIT_PRODUCER (cu) = buildsym_compunit->producer; | |
1435 | ||
1436 | COMPUNIT_BLOCKVECTOR (cu) = blockvector; | |
7bab9b58 | 1437 | { |
43f3e411 | 1438 | struct block *b = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); |
cb1df416 | 1439 | |
43f3e411 | 1440 | set_block_compunit_symtab (b, cu); |
7bab9b58 | 1441 | } |
cb1df416 | 1442 | |
43f3e411 DE |
1443 | COMPUNIT_BLOCK_LINE_SECTION (cu) = section; |
1444 | ||
6a976300 | 1445 | COMPUNIT_MACRO_TABLE (cu) = buildsym_compunit->release_macros (); |
43f3e411 | 1446 | |
7bab9b58 DE |
1447 | /* Default any symbols without a specified symtab to the primary symtab. */ |
1448 | { | |
1449 | int block_i; | |
1450 | ||
43f3e411 DE |
1451 | /* The main source file's symtab. */ |
1452 | symtab = COMPUNIT_FILETABS (cu); | |
1453 | ||
7bab9b58 DE |
1454 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) |
1455 | { | |
1456 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); | |
1457 | struct symbol *sym; | |
1458 | struct dict_iterator iter; | |
1459 | ||
1460 | /* Inlined functions may have symbols not in the global or | |
1461 | static symbol lists. */ | |
1462 | if (BLOCK_FUNCTION (block) != NULL) | |
08be3fe3 DE |
1463 | if (symbol_symtab (BLOCK_FUNCTION (block)) == NULL) |
1464 | symbol_set_symtab (BLOCK_FUNCTION (block), symtab); | |
7bab9b58 DE |
1465 | |
1466 | /* Note that we only want to fix up symbols from the local | |
1467 | blocks, not blocks coming from included symtabs. That is why | |
1468 | we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */ | |
1469 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
08be3fe3 DE |
1470 | if (symbol_symtab (sym) == NULL) |
1471 | symbol_set_symtab (sym, symtab); | |
7bab9b58 DE |
1472 | } |
1473 | } | |
edb3359d | 1474 | |
43f3e411 | 1475 | add_compunit_symtab_to_objfile (cu); |
43f3e411 DE |
1476 | |
1477 | return cu; | |
7bab9b58 DE |
1478 | } |
1479 | ||
1480 | /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK | |
1481 | as value returned by end_symtab_get_static_block. | |
1482 | ||
1483 | SECTION is the same as for end_symtab: the section number | |
1484 | (in objfile->section_offsets) of the blockvector and linetable. | |
1485 | ||
1486 | If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made | |
1487 | expandable. */ | |
1488 | ||
43f3e411 | 1489 | struct compunit_symtab * |
7bab9b58 | 1490 | end_symtab_from_static_block (struct block *static_block, |
4d663531 | 1491 | int section, int expandable) |
7bab9b58 | 1492 | { |
43f3e411 | 1493 | struct compunit_symtab *cu; |
7bab9b58 DE |
1494 | |
1495 | if (static_block == NULL) | |
1496 | { | |
0ab9ce85 DE |
1497 | /* Handle the "no blockvector" case. |
1498 | When this happens there is nothing to record, so there's nothing | |
1499 | to do: memory will be freed up later. | |
1500 | ||
1501 | Note: We won't be adding a compunit to the objfile's list of | |
1502 | compunits, so there's nothing to unchain. However, since each symtab | |
1503 | is added to the objfile's obstack we can't free that space. | |
1504 | We could do better, but this is believed to be a sufficiently rare | |
1505 | event. */ | |
43f3e411 | 1506 | cu = NULL; |
7bab9b58 DE |
1507 | } |
1508 | else | |
43f3e411 | 1509 | cu = end_symtab_with_blockvector (static_block, section, expandable); |
cb1df416 | 1510 | |
6d30eef8 DE |
1511 | reset_symtab_globals (); |
1512 | ||
43f3e411 | 1513 | return cu; |
6d30eef8 DE |
1514 | } |
1515 | ||
4359dff1 JK |
1516 | /* Finish the symbol definitions for one main source file, close off |
1517 | all the lexical contexts for that file (creating struct block's for | |
1518 | them), then make the struct symtab for that file and put it in the | |
1519 | list of all such. | |
1520 | ||
1521 | END_ADDR is the address of the end of the file's text. SECTION is | |
1522 | the section number (in objfile->section_offsets) of the blockvector | |
1523 | and linetable. | |
1524 | ||
1525 | Note that it is possible for end_symtab() to return NULL. In | |
1526 | particular, for the DWARF case at least, it will return NULL when | |
1527 | it finds a compilation unit that has exactly one DIE, a | |
1528 | TAG_compile_unit DIE. This can happen when we link in an object | |
1529 | file that was compiled from an empty source file. Returning NULL | |
1530 | is probably not the correct thing to do, because then gdb will | |
1531 | never know about this empty file (FIXME). | |
1532 | ||
1533 | If you need to modify STATIC_BLOCK before it is finalized you should | |
1534 | call end_symtab_get_static_block and end_symtab_from_static_block | |
1535 | yourself. */ | |
6d30eef8 | 1536 | |
43f3e411 | 1537 | struct compunit_symtab * |
4d663531 | 1538 | end_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1539 | { |
4359dff1 JK |
1540 | struct block *static_block; |
1541 | ||
4d663531 DE |
1542 | static_block = end_symtab_get_static_block (end_addr, 0, 0); |
1543 | return end_symtab_from_static_block (static_block, section, 0); | |
6d30eef8 DE |
1544 | } |
1545 | ||
4359dff1 | 1546 | /* Same as end_symtab except create a symtab that can be later added to. */ |
6d30eef8 | 1547 | |
43f3e411 | 1548 | struct compunit_symtab * |
4d663531 | 1549 | end_expandable_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1550 | { |
4359dff1 JK |
1551 | struct block *static_block; |
1552 | ||
4d663531 DE |
1553 | static_block = end_symtab_get_static_block (end_addr, 1, 0); |
1554 | return end_symtab_from_static_block (static_block, section, 1); | |
6d30eef8 DE |
1555 | } |
1556 | ||
1557 | /* Subroutine of augment_type_symtab to simplify it. | |
43f3e411 DE |
1558 | Attach the main source file's symtab to all symbols in PENDING_LIST that |
1559 | don't have one. */ | |
6d30eef8 DE |
1560 | |
1561 | static void | |
43f3e411 DE |
1562 | set_missing_symtab (struct pending *pending_list, |
1563 | struct compunit_symtab *cu) | |
6d30eef8 DE |
1564 | { |
1565 | struct pending *pending; | |
1566 | int i; | |
1567 | ||
1568 | for (pending = pending_list; pending != NULL; pending = pending->next) | |
801e3a5b | 1569 | { |
6d30eef8 DE |
1570 | for (i = 0; i < pending->nsyms; ++i) |
1571 | { | |
08be3fe3 DE |
1572 | if (symbol_symtab (pending->symbol[i]) == NULL) |
1573 | symbol_set_symtab (pending->symbol[i], COMPUNIT_FILETABS (cu)); | |
6d30eef8 | 1574 | } |
801e3a5b | 1575 | } |
6d30eef8 | 1576 | } |
c906108c | 1577 | |
6d30eef8 DE |
1578 | /* Same as end_symtab, but for the case where we're adding more symbols |
1579 | to an existing symtab that is known to contain only type information. | |
1580 | This is the case for DWARF4 Type Units. */ | |
1581 | ||
1582 | void | |
0ab9ce85 | 1583 | augment_type_symtab (void) |
6d30eef8 | 1584 | { |
0ab9ce85 | 1585 | struct compunit_symtab *cust = buildsym_compunit->compunit_symtab; |
43f3e411 | 1586 | const struct blockvector *blockvector = COMPUNIT_BLOCKVECTOR (cust); |
6d30eef8 DE |
1587 | |
1588 | if (context_stack_depth > 0) | |
1589 | { | |
b98664d3 | 1590 | complaint (_("Context stack not empty in augment_type_symtab")); |
6d30eef8 DE |
1591 | context_stack_depth = 0; |
1592 | } | |
1593 | if (pending_blocks != NULL) | |
b98664d3 | 1594 | complaint (_("Blocks in a type symtab")); |
6a976300 | 1595 | if (buildsym_compunit->m_pending_macros != NULL) |
b98664d3 | 1596 | complaint (_("Macro in a type symtab")); |
530fedbc | 1597 | if (buildsym_compunit->m_have_line_numbers) |
b98664d3 | 1598 | complaint (_("Line numbers recorded in a type symtab")); |
6d30eef8 DE |
1599 | |
1600 | if (file_symbols != NULL) | |
1601 | { | |
1602 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK); | |
1603 | ||
1604 | /* First mark any symbols without a specified symtab as belonging | |
1605 | to the primary symtab. */ | |
43f3e411 | 1606 | set_missing_symtab (file_symbols, cust); |
6d30eef8 DE |
1607 | |
1608 | dict_add_pending (BLOCK_DICT (block), file_symbols); | |
1609 | } | |
1610 | ||
1611 | if (global_symbols != NULL) | |
1612 | { | |
1613 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); | |
1614 | ||
1615 | /* First mark any symbols without a specified symtab as belonging | |
1616 | to the primary symtab. */ | |
43f3e411 | 1617 | set_missing_symtab (global_symbols, cust); |
6d30eef8 DE |
1618 | |
1619 | dict_add_pending (BLOCK_DICT (block), global_symbols); | |
1620 | } | |
1621 | ||
1622 | reset_symtab_globals (); | |
c906108c SS |
1623 | } |
1624 | ||
1625 | /* Push a context block. Args are an identifying nesting level | |
1626 | (checkable when you pop it), and the starting PC address of this | |
1627 | context. */ | |
1628 | ||
1629 | struct context_stack * | |
1630 | push_context (int desc, CORE_ADDR valu) | |
1631 | { | |
fe978cb0 | 1632 | struct context_stack *newobj; |
c906108c SS |
1633 | |
1634 | if (context_stack_depth == context_stack_size) | |
1635 | { | |
1636 | context_stack_size *= 2; | |
1637 | context_stack = (struct context_stack *) | |
1638 | xrealloc ((char *) context_stack, | |
c5aa993b | 1639 | (context_stack_size * sizeof (struct context_stack))); |
c906108c SS |
1640 | } |
1641 | ||
fe978cb0 PA |
1642 | newobj = &context_stack[context_stack_depth++]; |
1643 | newobj->depth = desc; | |
1644 | newobj->locals = local_symbols; | |
1645 | newobj->old_blocks = pending_blocks; | |
1646 | newobj->start_addr = valu; | |
22cee43f | 1647 | newobj->local_using_directives = local_using_directives; |
fe978cb0 | 1648 | newobj->name = NULL; |
c906108c SS |
1649 | |
1650 | local_symbols = NULL; | |
22cee43f | 1651 | local_using_directives = NULL; |
c906108c | 1652 | |
fe978cb0 | 1653 | return newobj; |
c906108c | 1654 | } |
0c5e171a | 1655 | |
a672ef13 | 1656 | /* Pop a context block. Returns the address of the context block just |
4a64f543 | 1657 | popped. */ |
a672ef13 | 1658 | |
0c5e171a KD |
1659 | struct context_stack * |
1660 | pop_context (void) | |
1661 | { | |
1662 | gdb_assert (context_stack_depth > 0); | |
1663 | return (&context_stack[--context_stack_depth]); | |
1664 | } | |
1665 | ||
c906108c | 1666 | \f |
357e46e7 | 1667 | |
c906108c | 1668 | void |
554d387d | 1669 | record_debugformat (const char *format) |
c906108c | 1670 | { |
43f3e411 | 1671 | buildsym_compunit->debugformat = format; |
c906108c SS |
1672 | } |
1673 | ||
303b6f5d DJ |
1674 | void |
1675 | record_producer (const char *producer) | |
1676 | { | |
43f3e411 | 1677 | buildsym_compunit->producer = producer; |
303b6f5d DJ |
1678 | } |
1679 | ||
c906108c SS |
1680 | /* Merge the first symbol list SRCLIST into the second symbol list |
1681 | TARGETLIST by repeated calls to add_symbol_to_list(). This | |
1682 | procedure "frees" each link of SRCLIST by adding it to the | |
1683 | free_pendings list. Caller must set SRCLIST to a null list after | |
1684 | calling this function. | |
1685 | ||
4a64f543 | 1686 | Void return. */ |
c906108c SS |
1687 | |
1688 | void | |
1689 | merge_symbol_lists (struct pending **srclist, struct pending **targetlist) | |
1690 | { | |
52f0bd74 | 1691 | int i; |
c906108c SS |
1692 | |
1693 | if (!srclist || !*srclist) | |
1694 | return; | |
1695 | ||
1696 | /* Merge in elements from current link. */ | |
1697 | for (i = 0; i < (*srclist)->nsyms; i++) | |
1698 | add_symbol_to_list ((*srclist)->symbol[i], targetlist); | |
1699 | ||
1700 | /* Recurse on next. */ | |
1701 | merge_symbol_lists (&(*srclist)->next, targetlist); | |
1702 | ||
1703 | /* "Free" the current link. */ | |
1704 | (*srclist)->next = free_pendings; | |
1705 | free_pendings = (*srclist); | |
1706 | } | |
1707 | \f | |
46212e0b | 1708 | |
46212e0b TT |
1709 | /* See buildsym.h. */ |
1710 | ||
1711 | void | |
1712 | set_last_source_file (const char *name) | |
1713 | { | |
c0015d44 TT |
1714 | gdb_assert (buildsym_compunit != nullptr || name == nullptr); |
1715 | if (buildsym_compunit != nullptr) | |
1716 | buildsym_compunit->set_last_source_file (name); | |
46212e0b TT |
1717 | } |
1718 | ||
1719 | /* See buildsym.h. */ | |
1720 | ||
1721 | const char * | |
1722 | get_last_source_file (void) | |
1723 | { | |
c0015d44 TT |
1724 | if (buildsym_compunit == nullptr) |
1725 | return nullptr; | |
1726 | return buildsym_compunit->m_last_source_file.get (); | |
46212e0b TT |
1727 | } |
1728 | ||
2c99ee5c TT |
1729 | /* See buildsym.h. */ |
1730 | ||
1731 | void | |
1732 | set_last_source_start_addr (CORE_ADDR addr) | |
1733 | { | |
1734 | gdb_assert (buildsym_compunit != nullptr); | |
1735 | buildsym_compunit->m_last_source_start_addr = addr; | |
1736 | } | |
1737 | ||
1738 | /* See buildsym.h. */ | |
1739 | ||
1740 | CORE_ADDR | |
1741 | get_last_source_start_addr () | |
1742 | { | |
1743 | gdb_assert (buildsym_compunit != nullptr); | |
1744 | return buildsym_compunit->m_last_source_start_addr; | |
1745 | } | |
1746 | ||
46212e0b TT |
1747 | \f |
1748 | ||
c906108c SS |
1749 | /* Initialize anything that needs initializing when starting to read a |
1750 | fresh piece of a symbol file, e.g. reading in the stuff | |
1751 | corresponding to a psymtab. */ | |
1752 | ||
1753 | void | |
fba45db2 | 1754 | buildsym_init (void) |
c906108c | 1755 | { |
fc474241 | 1756 | subfile_stack = NULL; |
801e3a5b | 1757 | |
801e3a5b | 1758 | pending_addrmap_interesting = 0; |
0ab9ce85 DE |
1759 | |
1760 | /* Context stack is initially empty. Allocate first one with room | |
1761 | for a few levels; reuse it forever afterward. */ | |
1762 | if (context_stack == NULL) | |
1763 | { | |
1764 | context_stack_size = INITIAL_CONTEXT_STACK_SIZE; | |
8d749320 | 1765 | context_stack = XNEWVEC (struct context_stack, context_stack_size); |
0ab9ce85 DE |
1766 | } |
1767 | ||
33c7c59d | 1768 | /* Ensure the scoped_free_pendings destructor was called after |
0ab9ce85 DE |
1769 | the last time. */ |
1770 | gdb_assert (free_pendings == NULL); | |
1771 | gdb_assert (pending_blocks == NULL); | |
1772 | gdb_assert (file_symbols == NULL); | |
1773 | gdb_assert (global_symbols == NULL); | |
22cee43f | 1774 | gdb_assert (global_using_directives == NULL); |
0ab9ce85 DE |
1775 | gdb_assert (pending_addrmap == NULL); |
1776 | gdb_assert (buildsym_compunit == NULL); | |
c906108c SS |
1777 | } |
1778 | ||
1779 | /* Initialize anything that needs initializing when a completely new | |
1780 | symbol file is specified (not just adding some symbols from another | |
1781 | file, e.g. a shared library). */ | |
1782 | ||
1783 | void | |
fba45db2 | 1784 | buildsym_new_init (void) |
c906108c SS |
1785 | { |
1786 | buildsym_init (); | |
1787 | } |