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; | |
8419ee53 TT |
204 | |
205 | /* Stack of subfile names. */ | |
206 | std::vector<const char *> m_subfile_stack; | |
6cccc9a8 TT |
207 | |
208 | /* The "using" directives local to lexical context. */ | |
209 | struct using_direct *m_local_using_directives = nullptr; | |
210 | ||
211 | /* Global "using" directives. */ | |
212 | struct using_direct *m_global_using_directives = nullptr; | |
a60f3166 TT |
213 | |
214 | /* The stack of contexts that are pushed by push_context and popped | |
215 | by pop_context. */ | |
216 | std::vector<struct context_stack> m_context_stack; | |
3c65e5b3 TT |
217 | |
218 | struct subfile *m_current_subfile = nullptr; | |
7ea05a7b TT |
219 | |
220 | /* The mutable address map for the compilation unit whose symbols | |
221 | we're currently reading. The symtabs' shared blockvector will | |
222 | point to a fixed copy of this. */ | |
223 | struct addrmap *m_pending_addrmap = nullptr; | |
224 | ||
225 | /* The obstack on which we allocate pending_addrmap. | |
226 | If pending_addrmap is NULL, this is uninitialized; otherwise, it is | |
227 | initialized (and holds pending_addrmap). */ | |
228 | auto_obstack m_pending_addrmap_obstack; | |
229 | ||
230 | /* True if we recorded any ranges in the addrmap that are different | |
231 | from those in the blockvector already. We set this to false when | |
232 | we start processing a symfile, and if it's still false at the | |
233 | end, then we just toss the addrmap. */ | |
234 | bool m_pending_addrmap_interesting = false; | |
43f3e411 | 235 | }; |
94d09e04 | 236 | |
43f3e411 DE |
237 | /* The work-in-progress of the compunit we are building. |
238 | This is created first, before any subfiles by start_symtab. */ | |
7bab9b58 | 239 | |
43f3e411 | 240 | static struct buildsym_compunit *buildsym_compunit; |
7bab9b58 | 241 | |
c906108c SS |
242 | /* List of free `struct pending' structures for reuse. */ |
243 | ||
244 | static struct pending *free_pendings; | |
245 | ||
93eed41f TT |
246 | /* An obstack used for allocating pending blocks. */ |
247 | ||
248 | static struct obstack pending_block_obstack; | |
249 | ||
250 | /* List of blocks already made (lexical contexts already closed). | |
251 | This is used at the end to make the blockvector. */ | |
252 | ||
253 | struct pending_block | |
254 | { | |
255 | struct pending_block *next; | |
256 | struct block *block; | |
257 | }; | |
258 | ||
259 | /* Pointer to the head of a linked list of symbol blocks which have | |
260 | already been finalized (lexical contexts already closed) and which | |
261 | are just waiting to be built into a blockvector when finalizing the | |
262 | associated symtab. */ | |
263 | ||
264 | static struct pending_block *pending_blocks; | |
fc474241 | 265 | |
0ab9ce85 DE |
266 | static void free_buildsym_compunit (void); |
267 | ||
c906108c | 268 | static int compare_line_numbers (const void *ln1p, const void *ln2p); |
0b49e518 TT |
269 | |
270 | static void record_pending_block (struct objfile *objfile, | |
271 | struct block *block, | |
272 | struct pending_block *opblock); | |
c906108c | 273 | |
652788a7 TT |
274 | static void free_pending_blocks (); |
275 | ||
c906108c SS |
276 | /* Initial sizes of data structures. These are realloc'd larger if |
277 | needed, and realloc'd down to the size actually used, when | |
278 | completed. */ | |
279 | ||
c906108c SS |
280 | #define INITIAL_LINE_VECTOR_LENGTH 1000 |
281 | \f | |
282 | ||
4a64f543 | 283 | /* Maintain the lists of symbols and blocks. */ |
c906108c | 284 | |
93bf33fd | 285 | /* Add a symbol to one of the lists of symbols. */ |
c906108c SS |
286 | |
287 | void | |
288 | add_symbol_to_list (struct symbol *symbol, struct pending **listhead) | |
289 | { | |
52f0bd74 | 290 | struct pending *link; |
c906108c SS |
291 | |
292 | /* If this is an alias for another symbol, don't add it. */ | |
293 | if (symbol->ginfo.name && symbol->ginfo.name[0] == '#') | |
294 | return; | |
295 | ||
4a64f543 | 296 | /* We keep PENDINGSIZE symbols in each link of the list. If we |
c906108c SS |
297 | don't have a link with room in it, add a new link. */ |
298 | if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE) | |
299 | { | |
300 | if (free_pendings) | |
301 | { | |
302 | link = free_pendings; | |
303 | free_pendings = link->next; | |
304 | } | |
305 | else | |
306 | { | |
8d749320 | 307 | link = XNEW (struct pending); |
c906108c SS |
308 | } |
309 | ||
310 | link->next = *listhead; | |
311 | *listhead = link; | |
312 | link->nsyms = 0; | |
313 | } | |
314 | ||
315 | (*listhead)->symbol[(*listhead)->nsyms++] = symbol; | |
316 | } | |
317 | ||
318 | /* Find a symbol named NAME on a LIST. NAME need not be | |
319 | '\0'-terminated; LENGTH is the length of the name. */ | |
320 | ||
321 | struct symbol * | |
322 | find_symbol_in_list (struct pending *list, char *name, int length) | |
323 | { | |
324 | int j; | |
0d5cff50 | 325 | const char *pp; |
c906108c SS |
326 | |
327 | while (list != NULL) | |
328 | { | |
329 | for (j = list->nsyms; --j >= 0;) | |
330 | { | |
3567439c | 331 | pp = SYMBOL_LINKAGE_NAME (list->symbol[j]); |
5aafa1cc PM |
332 | if (*pp == *name && strncmp (pp, name, length) == 0 |
333 | && pp[length] == '\0') | |
c906108c SS |
334 | { |
335 | return (list->symbol[j]); | |
336 | } | |
337 | } | |
338 | list = list->next; | |
339 | } | |
340 | return (NULL); | |
341 | } | |
342 | ||
652788a7 TT |
343 | scoped_free_pendings::scoped_free_pendings () |
344 | { | |
345 | gdb_assert (pending_blocks == nullptr); | |
346 | } | |
347 | ||
33c7c59d TT |
348 | /* At end of reading syms, or in case of quit, ensure everything |
349 | associated with building symtabs is freed. | |
0ab9ce85 DE |
350 | |
351 | N.B. This is *not* intended to be used when building psymtabs. Some debug | |
352 | info readers call this anyway, which is harmless if confusing. */ | |
c906108c | 353 | |
33c7c59d | 354 | scoped_free_pendings::~scoped_free_pendings () |
c906108c SS |
355 | { |
356 | struct pending *next, *next1; | |
357 | ||
358 | for (next = free_pendings; next; next = next1) | |
359 | { | |
360 | next1 = next->next; | |
b8c9b27d | 361 | xfree ((void *) next); |
c906108c SS |
362 | } |
363 | free_pendings = NULL; | |
364 | ||
365 | free_pending_blocks (); | |
366 | ||
367 | for (next = file_symbols; next != NULL; next = next1) | |
368 | { | |
369 | next1 = next->next; | |
b8c9b27d | 370 | xfree ((void *) next); |
c906108c SS |
371 | } |
372 | file_symbols = NULL; | |
373 | ||
374 | for (next = global_symbols; next != NULL; next = next1) | |
375 | { | |
376 | next1 = next->next; | |
b8c9b27d | 377 | xfree ((void *) next); |
c906108c SS |
378 | } |
379 | global_symbols = NULL; | |
99d9066e | 380 | |
0ab9ce85 | 381 | free_buildsym_compunit (); |
c906108c SS |
382 | } |
383 | ||
4a64f543 | 384 | /* This function is called to discard any pending blocks. */ |
c906108c | 385 | |
652788a7 TT |
386 | static void |
387 | free_pending_blocks () | |
c906108c | 388 | { |
93eed41f TT |
389 | if (pending_blocks != NULL) |
390 | { | |
391 | obstack_free (&pending_block_obstack, NULL); | |
392 | pending_blocks = NULL; | |
393 | } | |
c906108c SS |
394 | } |
395 | ||
396 | /* Take one of the lists of symbols and make a block from it. Keep | |
397 | the order the symbols have in the list (reversed from the input | |
398 | file). Put the block on the list of pending blocks. */ | |
399 | ||
84a146c9 | 400 | static struct block * |
63e43d3a PMR |
401 | finish_block_internal (struct symbol *symbol, |
402 | struct pending **listhead, | |
84a146c9 | 403 | struct pending_block *old_blocks, |
63e43d3a | 404 | const struct dynamic_prop *static_link, |
84a146c9 | 405 | CORE_ADDR start, CORE_ADDR end, |
6d30eef8 | 406 | int is_global, int expandable) |
c906108c | 407 | { |
43f3e411 | 408 | struct objfile *objfile = buildsym_compunit->objfile; |
5af949e3 | 409 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
52f0bd74 AC |
410 | struct pending *next, *next1; |
411 | struct block *block; | |
412 | struct pending_block *pblock; | |
c906108c | 413 | struct pending_block *opblock; |
c906108c | 414 | |
84a146c9 TT |
415 | block = (is_global |
416 | ? allocate_global_block (&objfile->objfile_obstack) | |
417 | : allocate_block (&objfile->objfile_obstack)); | |
c906108c | 418 | |
261397f8 DJ |
419 | if (symbol) |
420 | { | |
5ffa0793 PA |
421 | BLOCK_DICT (block) |
422 | = dict_create_linear (&objfile->objfile_obstack, | |
423 | buildsym_compunit->language, *listhead); | |
261397f8 DJ |
424 | } |
425 | else | |
c906108c | 426 | { |
6d30eef8 DE |
427 | if (expandable) |
428 | { | |
5ffa0793 PA |
429 | BLOCK_DICT (block) |
430 | = dict_create_hashed_expandable (buildsym_compunit->language); | |
6d30eef8 DE |
431 | dict_add_pending (BLOCK_DICT (block), *listhead); |
432 | } | |
433 | else | |
434 | { | |
435 | BLOCK_DICT (block) = | |
5ffa0793 PA |
436 | dict_create_hashed (&objfile->objfile_obstack, |
437 | buildsym_compunit->language, *listhead); | |
6d30eef8 | 438 | } |
c906108c SS |
439 | } |
440 | ||
441 | BLOCK_START (block) = start; | |
442 | BLOCK_END (block) = end; | |
c906108c | 443 | |
c906108c SS |
444 | /* Put the block in as the value of the symbol that names it. */ |
445 | ||
446 | if (symbol) | |
447 | { | |
448 | struct type *ftype = SYMBOL_TYPE (symbol); | |
de4f826b | 449 | struct dict_iterator iter; |
c906108c SS |
450 | SYMBOL_BLOCK_VALUE (symbol) = block; |
451 | BLOCK_FUNCTION (block) = symbol; | |
452 | ||
453 | if (TYPE_NFIELDS (ftype) <= 0) | |
454 | { | |
455 | /* No parameter type information is recorded with the | |
456 | function's type. Set that from the type of the | |
4a64f543 | 457 | parameter symbols. */ |
c906108c SS |
458 | int nparams = 0, iparams; |
459 | struct symbol *sym; | |
8157b174 TT |
460 | |
461 | /* Here we want to directly access the dictionary, because | |
462 | we haven't fully initialized the block yet. */ | |
463 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 464 | { |
2a2d4dc3 AS |
465 | if (SYMBOL_IS_ARGUMENT (sym)) |
466 | nparams++; | |
c906108c SS |
467 | } |
468 | if (nparams > 0) | |
469 | { | |
470 | TYPE_NFIELDS (ftype) = nparams; | |
471 | TYPE_FIELDS (ftype) = (struct field *) | |
472 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); | |
473 | ||
de4f826b | 474 | iparams = 0; |
8157b174 TT |
475 | /* Here we want to directly access the dictionary, because |
476 | we haven't fully initialized the block yet. */ | |
477 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
c906108c | 478 | { |
de4f826b DC |
479 | if (iparams == nparams) |
480 | break; | |
481 | ||
2a2d4dc3 | 482 | if (SYMBOL_IS_ARGUMENT (sym)) |
c906108c | 483 | { |
c906108c | 484 | TYPE_FIELD_TYPE (ftype, iparams) = SYMBOL_TYPE (sym); |
8176bb6d | 485 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
c906108c | 486 | iparams++; |
c906108c SS |
487 | } |
488 | } | |
489 | } | |
490 | } | |
491 | } | |
492 | else | |
493 | { | |
494 | BLOCK_FUNCTION (block) = NULL; | |
495 | } | |
496 | ||
63e43d3a PMR |
497 | if (static_link != NULL) |
498 | objfile_register_static_link (objfile, block, static_link); | |
499 | ||
c906108c SS |
500 | /* Now "free" the links of the list, and empty the list. */ |
501 | ||
502 | for (next = *listhead; next; next = next1) | |
503 | { | |
504 | next1 = next->next; | |
505 | next->next = free_pendings; | |
506 | free_pendings = next; | |
507 | } | |
508 | *listhead = NULL; | |
509 | ||
c906108c | 510 | /* Check to be sure that the blocks have an end address that is |
4a64f543 | 511 | greater than starting address. */ |
c906108c SS |
512 | |
513 | if (BLOCK_END (block) < BLOCK_START (block)) | |
514 | { | |
515 | if (symbol) | |
516 | { | |
b98664d3 | 517 | complaint (_("block end address less than block " |
3e43a32a | 518 | "start address in %s (patched it)"), |
de5ad195 | 519 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
520 | } |
521 | else | |
522 | { | |
b98664d3 | 523 | complaint (_("block end address %s less than block " |
3e43a32a | 524 | "start address %s (patched it)"), |
5af949e3 UW |
525 | paddress (gdbarch, BLOCK_END (block)), |
526 | paddress (gdbarch, BLOCK_START (block))); | |
c906108c | 527 | } |
4a64f543 | 528 | /* Better than nothing. */ |
c906108c SS |
529 | BLOCK_END (block) = BLOCK_START (block); |
530 | } | |
c906108c SS |
531 | |
532 | /* Install this block as the superblock of all blocks made since the | |
533 | start of this scope that don't have superblocks yet. */ | |
534 | ||
535 | opblock = NULL; | |
c0219d42 MS |
536 | for (pblock = pending_blocks; |
537 | pblock && pblock != old_blocks; | |
538 | pblock = pblock->next) | |
c906108c SS |
539 | { |
540 | if (BLOCK_SUPERBLOCK (pblock->block) == NULL) | |
541 | { | |
c906108c | 542 | /* Check to be sure the blocks are nested as we receive |
4a64f543 | 543 | them. If the compiler/assembler/linker work, this just |
14711c82 DJ |
544 | burns a small amount of time. |
545 | ||
546 | Skip blocks which correspond to a function; they're not | |
547 | physically nested inside this other blocks, only | |
548 | lexically nested. */ | |
549 | if (BLOCK_FUNCTION (pblock->block) == NULL | |
550 | && (BLOCK_START (pblock->block) < BLOCK_START (block) | |
551 | || BLOCK_END (pblock->block) > BLOCK_END (block))) | |
c906108c SS |
552 | { |
553 | if (symbol) | |
554 | { | |
b98664d3 | 555 | complaint (_("inner block not inside outer block in %s"), |
de5ad195 | 556 | SYMBOL_PRINT_NAME (symbol)); |
c906108c SS |
557 | } |
558 | else | |
559 | { | |
b98664d3 | 560 | complaint (_("inner block (%s-%s) not " |
3e43a32a | 561 | "inside outer block (%s-%s)"), |
5af949e3 UW |
562 | paddress (gdbarch, BLOCK_START (pblock->block)), |
563 | paddress (gdbarch, BLOCK_END (pblock->block)), | |
564 | paddress (gdbarch, BLOCK_START (block)), | |
565 | paddress (gdbarch, BLOCK_END (block))); | |
c906108c SS |
566 | } |
567 | if (BLOCK_START (pblock->block) < BLOCK_START (block)) | |
568 | BLOCK_START (pblock->block) = BLOCK_START (block); | |
569 | if (BLOCK_END (pblock->block) > BLOCK_END (block)) | |
570 | BLOCK_END (pblock->block) = BLOCK_END (block); | |
571 | } | |
c906108c SS |
572 | BLOCK_SUPERBLOCK (pblock->block) = block; |
573 | } | |
574 | opblock = pblock; | |
575 | } | |
576 | ||
22cee43f PMR |
577 | block_set_using (block, |
578 | (is_global | |
6cccc9a8 TT |
579 | ? buildsym_compunit->m_global_using_directives |
580 | : buildsym_compunit->m_local_using_directives), | |
22cee43f PMR |
581 | &objfile->objfile_obstack); |
582 | if (is_global) | |
6cccc9a8 | 583 | buildsym_compunit->m_global_using_directives = NULL; |
22cee43f | 584 | else |
6cccc9a8 | 585 | buildsym_compunit->m_local_using_directives = NULL; |
27aa8d6a | 586 | |
c906108c | 587 | record_pending_block (objfile, block, opblock); |
801e3a5b JB |
588 | |
589 | return block; | |
c906108c SS |
590 | } |
591 | ||
84a146c9 | 592 | struct block * |
63e43d3a PMR |
593 | finish_block (struct symbol *symbol, |
594 | struct pending **listhead, | |
84a146c9 | 595 | struct pending_block *old_blocks, |
63e43d3a | 596 | const struct dynamic_prop *static_link, |
4d663531 | 597 | CORE_ADDR start, CORE_ADDR end) |
84a146c9 | 598 | { |
63e43d3a | 599 | return finish_block_internal (symbol, listhead, old_blocks, static_link, |
4d663531 | 600 | start, end, 0, 0); |
84a146c9 | 601 | } |
de4f826b | 602 | |
c906108c SS |
603 | /* Record BLOCK on the list of all blocks in the file. Put it after |
604 | OPBLOCK, or at the beginning if opblock is NULL. This puts the | |
605 | block in the list after all its subblocks. | |
606 | ||
4a146b47 | 607 | Allocate the pending block struct in the objfile_obstack to save |
c906108c SS |
608 | time. This wastes a little space. FIXME: Is it worth it? */ |
609 | ||
0b49e518 | 610 | static void |
c906108c SS |
611 | record_pending_block (struct objfile *objfile, struct block *block, |
612 | struct pending_block *opblock) | |
613 | { | |
52f0bd74 | 614 | struct pending_block *pblock; |
c906108c | 615 | |
93eed41f TT |
616 | if (pending_blocks == NULL) |
617 | obstack_init (&pending_block_obstack); | |
618 | ||
8d749320 | 619 | pblock = XOBNEW (&pending_block_obstack, struct pending_block); |
c906108c SS |
620 | pblock->block = block; |
621 | if (opblock) | |
622 | { | |
623 | pblock->next = opblock->next; | |
624 | opblock->next = pblock; | |
625 | } | |
626 | else | |
627 | { | |
628 | pblock->next = pending_blocks; | |
629 | pending_blocks = pblock; | |
630 | } | |
631 | } | |
632 | ||
801e3a5b JB |
633 | |
634 | /* Record that the range of addresses from START to END_INCLUSIVE | |
635 | (inclusive, like it says) belongs to BLOCK. BLOCK's start and end | |
636 | addresses must be set already. You must apply this function to all | |
637 | BLOCK's children before applying it to BLOCK. | |
638 | ||
639 | If a call to this function complicates the picture beyond that | |
640 | already provided by BLOCK_START and BLOCK_END, then we create an | |
641 | address map for the block. */ | |
642 | void | |
643 | record_block_range (struct block *block, | |
644 | CORE_ADDR start, CORE_ADDR end_inclusive) | |
645 | { | |
646 | /* If this is any different from the range recorded in the block's | |
647 | own BLOCK_START and BLOCK_END, then note that the address map has | |
648 | become interesting. Note that even if this block doesn't have | |
649 | any "interesting" ranges, some later block might, so we still | |
650 | need to record this block in the addrmap. */ | |
651 | if (start != BLOCK_START (block) | |
652 | || end_inclusive + 1 != BLOCK_END (block)) | |
7ea05a7b | 653 | buildsym_compunit->m_pending_addrmap_interesting = true; |
801e3a5b | 654 | |
7ea05a7b TT |
655 | if (buildsym_compunit->m_pending_addrmap == nullptr) |
656 | buildsym_compunit->m_pending_addrmap | |
657 | = addrmap_create_mutable (&buildsym_compunit->m_pending_addrmap_obstack); | |
801e3a5b | 658 | |
7ea05a7b TT |
659 | addrmap_set_empty (buildsym_compunit->m_pending_addrmap, |
660 | start, end_inclusive, block); | |
801e3a5b JB |
661 | } |
662 | ||
822e978b | 663 | static struct blockvector * |
43f3e411 | 664 | make_blockvector (void) |
c906108c | 665 | { |
43f3e411 | 666 | struct objfile *objfile = buildsym_compunit->objfile; |
52f0bd74 AC |
667 | struct pending_block *next; |
668 | struct blockvector *blockvector; | |
669 | int i; | |
c906108c SS |
670 | |
671 | /* Count the length of the list of blocks. */ | |
672 | ||
673 | for (next = pending_blocks, i = 0; next; next = next->next, i++) | |
674 | {; | |
675 | } | |
676 | ||
677 | blockvector = (struct blockvector *) | |
4a146b47 | 678 | obstack_alloc (&objfile->objfile_obstack, |
c906108c SS |
679 | (sizeof (struct blockvector) |
680 | + (i - 1) * sizeof (struct block *))); | |
681 | ||
4a64f543 | 682 | /* Copy the blocks into the blockvector. This is done in reverse |
c906108c | 683 | order, which happens to put the blocks into the proper order |
4a64f543 | 684 | (ascending starting address). finish_block has hair to insert |
c906108c SS |
685 | each block into the list after its subblocks in order to make |
686 | sure this is true. */ | |
687 | ||
688 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
689 | for (next = pending_blocks; next; next = next->next) | |
690 | { | |
691 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
692 | } | |
693 | ||
89ba75b1 | 694 | free_pending_blocks (); |
c906108c | 695 | |
801e3a5b JB |
696 | /* If we needed an address map for this symtab, record it in the |
697 | blockvector. */ | |
7ea05a7b TT |
698 | if (buildsym_compunit->m_pending_addrmap != nullptr |
699 | && buildsym_compunit->m_pending_addrmap_interesting) | |
801e3a5b | 700 | BLOCKVECTOR_MAP (blockvector) |
7ea05a7b TT |
701 | = addrmap_create_fixed (buildsym_compunit->m_pending_addrmap, |
702 | &objfile->objfile_obstack); | |
801e3a5b JB |
703 | else |
704 | BLOCKVECTOR_MAP (blockvector) = 0; | |
4aad0dfc | 705 | |
c906108c | 706 | /* Some compilers output blocks in the wrong order, but we depend on |
4a64f543 | 707 | their being in the right order so we can binary search. Check the |
4aad0dfc DE |
708 | order and moan about it. |
709 | Note: Remember that the first two blocks are the global and static | |
710 | blocks. We could special case that fact and begin checking at block 2. | |
711 | To avoid making that assumption we do not. */ | |
c906108c SS |
712 | if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) |
713 | { | |
714 | for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) | |
715 | { | |
716 | if (BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i - 1)) | |
717 | > BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i))) | |
718 | { | |
59527da0 JB |
719 | CORE_ADDR start |
720 | = BLOCK_START (BLOCKVECTOR_BLOCK (blockvector, i)); | |
c906108c | 721 | |
b98664d3 | 722 | complaint (_("block at %s out of order"), |
bb599908 | 723 | hex_string ((LONGEST) start)); |
c906108c SS |
724 | } |
725 | } | |
726 | } | |
c906108c SS |
727 | |
728 | return (blockvector); | |
729 | } | |
730 | \f | |
731 | /* Start recording information about source code that came from an | |
732 | included (or otherwise merged-in) source file with a different | |
4d663531 | 733 | name. NAME is the name of the file (cannot be NULL). */ |
c906108c SS |
734 | |
735 | void | |
4d663531 | 736 | start_subfile (const char *name) |
c906108c | 737 | { |
43f3e411 | 738 | const char *subfile_dirname; |
52f0bd74 | 739 | struct subfile *subfile; |
c906108c | 740 | |
43f3e411 DE |
741 | gdb_assert (buildsym_compunit != NULL); |
742 | ||
905eb0e2 | 743 | subfile_dirname = buildsym_compunit->comp_dir.get (); |
c906108c | 744 | |
43f3e411 DE |
745 | /* See if this subfile is already registered. */ |
746 | ||
747 | for (subfile = buildsym_compunit->subfiles; subfile; subfile = subfile->next) | |
c906108c | 748 | { |
84ba0adf DJ |
749 | char *subfile_name; |
750 | ||
751 | /* If NAME is an absolute path, and this subfile is not, then | |
752 | attempt to create an absolute path to compare. */ | |
753 | if (IS_ABSOLUTE_PATH (name) | |
754 | && !IS_ABSOLUTE_PATH (subfile->name) | |
43f3e411 DE |
755 | && subfile_dirname != NULL) |
756 | subfile_name = concat (subfile_dirname, SLASH_STRING, | |
6eb7ee03 | 757 | subfile->name, (char *) NULL); |
84ba0adf DJ |
758 | else |
759 | subfile_name = subfile->name; | |
760 | ||
761 | if (FILENAME_CMP (subfile_name, name) == 0) | |
c906108c | 762 | { |
3c65e5b3 | 763 | buildsym_compunit->m_current_subfile = subfile; |
84ba0adf DJ |
764 | if (subfile_name != subfile->name) |
765 | xfree (subfile_name); | |
c906108c SS |
766 | return; |
767 | } | |
84ba0adf DJ |
768 | if (subfile_name != subfile->name) |
769 | xfree (subfile_name); | |
c906108c SS |
770 | } |
771 | ||
43f3e411 | 772 | /* This subfile is not known. Add an entry for it. */ |
c906108c | 773 | |
8d749320 | 774 | subfile = XNEW (struct subfile); |
43f3e411 DE |
775 | memset (subfile, 0, sizeof (struct subfile)); |
776 | subfile->buildsym_compunit = buildsym_compunit; | |
777 | ||
778 | subfile->next = buildsym_compunit->subfiles; | |
779 | buildsym_compunit->subfiles = subfile; | |
780 | ||
3c65e5b3 | 781 | buildsym_compunit->m_current_subfile = subfile; |
c906108c | 782 | |
b74db436 | 783 | subfile->name = xstrdup (name); |
c906108c SS |
784 | |
785 | /* Initialize line-number recording for this subfile. */ | |
786 | subfile->line_vector = NULL; | |
787 | ||
788 | /* Default the source language to whatever can be deduced from the | |
789 | filename. If nothing can be deduced (such as for a C/C++ include | |
790 | file with a ".h" extension), then inherit whatever language the | |
791 | previous subfile had. This kludgery is necessary because there | |
792 | is no standard way in some object formats to record the source | |
793 | language. Also, when symtabs are allocated we try to deduce a | |
794 | language then as well, but it is too late for us to use that | |
795 | information while reading symbols, since symtabs aren't allocated | |
796 | until after all the symbols have been processed for a given | |
4a64f543 | 797 | source file. */ |
c906108c SS |
798 | |
799 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
800 | if (subfile->language == language_unknown |
801 | && subfile->next != NULL) | |
c906108c SS |
802 | { |
803 | subfile->language = subfile->next->language; | |
804 | } | |
805 | ||
25caa7a8 | 806 | /* If the filename of this subfile ends in .C, then change the |
c906108c | 807 | language of any pending subfiles from C to C++. We also accept |
25caa7a8 | 808 | any other C++ suffixes accepted by deduce_language_from_filename. */ |
c906108c SS |
809 | /* Likewise for f2c. */ |
810 | ||
811 | if (subfile->name) | |
812 | { | |
813 | struct subfile *s; | |
814 | enum language sublang = deduce_language_from_filename (subfile->name); | |
815 | ||
816 | if (sublang == language_cplus || sublang == language_fortran) | |
43f3e411 | 817 | for (s = buildsym_compunit->subfiles; s != NULL; s = s->next) |
c906108c SS |
818 | if (s->language == language_c) |
819 | s->language = sublang; | |
820 | } | |
821 | ||
822 | /* And patch up this file if necessary. */ | |
823 | if (subfile->language == language_c | |
824 | && subfile->next != NULL | |
825 | && (subfile->next->language == language_cplus | |
826 | || subfile->next->language == language_fortran)) | |
827 | { | |
828 | subfile->language = subfile->next->language; | |
829 | } | |
830 | } | |
831 | ||
43f3e411 | 832 | /* Delete the buildsym compunit. */ |
7bab9b58 DE |
833 | |
834 | static void | |
43f3e411 | 835 | free_buildsym_compunit (void) |
7bab9b58 | 836 | { |
43f3e411 DE |
837 | if (buildsym_compunit == NULL) |
838 | return; | |
b248663f | 839 | delete buildsym_compunit; |
43f3e411 | 840 | buildsym_compunit = NULL; |
7bab9b58 DE |
841 | } |
842 | ||
c906108c SS |
843 | /* For stabs readers, the first N_SO symbol is assumed to be the |
844 | source file name, and the subfile struct is initialized using that | |
845 | assumption. If another N_SO symbol is later seen, immediately | |
846 | following the first one, then the first one is assumed to be the | |
847 | directory name and the second one is really the source file name. | |
848 | ||
849 | So we have to patch up the subfile struct by moving the old name | |
850 | value to dirname and remembering the new name. Some sanity | |
851 | checking is performed to ensure that the state of the subfile | |
852 | struct is reasonable and that the old name we are assuming to be a | |
4a64f543 | 853 | directory name actually is (by checking for a trailing '/'). */ |
c906108c SS |
854 | |
855 | void | |
a121b7c1 | 856 | patch_subfile_names (struct subfile *subfile, const char *name) |
c906108c | 857 | { |
43f3e411 DE |
858 | if (subfile != NULL |
859 | && buildsym_compunit->comp_dir == NULL | |
860 | && subfile->name != NULL | |
0ba1096a | 861 | && IS_DIR_SEPARATOR (subfile->name[strlen (subfile->name) - 1])) |
c906108c | 862 | { |
905eb0e2 | 863 | buildsym_compunit->comp_dir.reset (subfile->name); |
1b36a34b | 864 | subfile->name = xstrdup (name); |
46212e0b | 865 | set_last_source_file (name); |
c906108c SS |
866 | |
867 | /* Default the source language to whatever can be deduced from | |
868 | the filename. If nothing can be deduced (such as for a C/C++ | |
869 | include file with a ".h" extension), then inherit whatever | |
870 | language the previous subfile had. This kludgery is | |
871 | necessary because there is no standard way in some object | |
872 | formats to record the source language. Also, when symtabs | |
873 | are allocated we try to deduce a language then as well, but | |
874 | it is too late for us to use that information while reading | |
875 | symbols, since symtabs aren't allocated until after all the | |
4a64f543 | 876 | symbols have been processed for a given source file. */ |
c906108c SS |
877 | |
878 | subfile->language = deduce_language_from_filename (subfile->name); | |
5aafa1cc PM |
879 | if (subfile->language == language_unknown |
880 | && subfile->next != NULL) | |
c906108c SS |
881 | { |
882 | subfile->language = subfile->next->language; | |
883 | } | |
884 | } | |
885 | } | |
886 | \f | |
887 | /* Handle the N_BINCL and N_EINCL symbol types that act like N_SOL for | |
888 | switching source files (different subfiles, as we call them) within | |
889 | one object file, but using a stack rather than in an arbitrary | |
890 | order. */ | |
891 | ||
892 | void | |
8419ee53 | 893 | push_subfile () |
c906108c | 894 | { |
8419ee53 | 895 | gdb_assert (buildsym_compunit != nullptr); |
3c65e5b3 TT |
896 | gdb_assert (buildsym_compunit->m_current_subfile != NULL); |
897 | gdb_assert (buildsym_compunit->m_current_subfile->name != NULL); | |
898 | buildsym_compunit->m_subfile_stack.push_back | |
899 | (buildsym_compunit->m_current_subfile->name); | |
c906108c SS |
900 | } |
901 | ||
8419ee53 TT |
902 | const char * |
903 | pop_subfile () | |
c906108c | 904 | { |
8419ee53 TT |
905 | gdb_assert (buildsym_compunit != nullptr); |
906 | gdb_assert (!buildsym_compunit->m_subfile_stack.empty ()); | |
907 | const char *name = buildsym_compunit->m_subfile_stack.back (); | |
908 | buildsym_compunit->m_subfile_stack.pop_back (); | |
909 | return name; | |
c906108c SS |
910 | } |
911 | \f | |
912 | /* Add a linetable entry for line number LINE and address PC to the | |
913 | line vector for SUBFILE. */ | |
914 | ||
915 | void | |
aa1ee363 | 916 | record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
c906108c SS |
917 | { |
918 | struct linetable_entry *e; | |
c906108c | 919 | |
cc59ec59 | 920 | /* Ignore the dummy line number in libg.o */ |
c906108c SS |
921 | if (line == 0xffff) |
922 | { | |
923 | return; | |
924 | } | |
925 | ||
926 | /* Make sure line vector exists and is big enough. */ | |
927 | if (!subfile->line_vector) | |
928 | { | |
929 | subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH; | |
930 | subfile->line_vector = (struct linetable *) | |
931 | xmalloc (sizeof (struct linetable) | |
c5aa993b | 932 | + subfile->line_vector_length * sizeof (struct linetable_entry)); |
c906108c | 933 | subfile->line_vector->nitems = 0; |
530fedbc | 934 | buildsym_compunit->m_have_line_numbers = true; |
c906108c SS |
935 | } |
936 | ||
937 | if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length) | |
938 | { | |
939 | subfile->line_vector_length *= 2; | |
940 | subfile->line_vector = (struct linetable *) | |
941 | xrealloc ((char *) subfile->line_vector, | |
942 | (sizeof (struct linetable) | |
943 | + (subfile->line_vector_length | |
944 | * sizeof (struct linetable_entry)))); | |
945 | } | |
946 | ||
607ae575 DJ |
947 | /* Normally, we treat lines as unsorted. But the end of sequence |
948 | marker is special. We sort line markers at the same PC by line | |
949 | number, so end of sequence markers (which have line == 0) appear | |
950 | first. This is right if the marker ends the previous function, | |
951 | and there is no padding before the next function. But it is | |
952 | wrong if the previous line was empty and we are now marking a | |
953 | switch to a different subfile. We must leave the end of sequence | |
954 | marker at the end of this group of lines, not sort the empty line | |
955 | to after the marker. The easiest way to accomplish this is to | |
956 | delete any empty lines from our table, if they are followed by | |
957 | end of sequence markers. All we lose is the ability to set | |
958 | breakpoints at some lines which contain no instructions | |
959 | anyway. */ | |
960 | if (line == 0 && subfile->line_vector->nitems > 0) | |
961 | { | |
962 | e = subfile->line_vector->item + subfile->line_vector->nitems - 1; | |
963 | while (subfile->line_vector->nitems > 0 && e->pc == pc) | |
964 | { | |
965 | e--; | |
966 | subfile->line_vector->nitems--; | |
967 | } | |
968 | } | |
969 | ||
c906108c SS |
970 | e = subfile->line_vector->item + subfile->line_vector->nitems++; |
971 | e->line = line; | |
607ae575 | 972 | e->pc = pc; |
c906108c SS |
973 | } |
974 | ||
975 | /* Needed in order to sort line tables from IBM xcoff files. Sigh! */ | |
976 | ||
977 | static int | |
978 | compare_line_numbers (const void *ln1p, const void *ln2p) | |
979 | { | |
980 | struct linetable_entry *ln1 = (struct linetable_entry *) ln1p; | |
981 | struct linetable_entry *ln2 = (struct linetable_entry *) ln2p; | |
982 | ||
983 | /* Note: this code does not assume that CORE_ADDRs can fit in ints. | |
984 | Please keep it that way. */ | |
985 | if (ln1->pc < ln2->pc) | |
986 | return -1; | |
987 | ||
988 | if (ln1->pc > ln2->pc) | |
989 | return 1; | |
990 | ||
991 | /* If pc equal, sort by line. I'm not sure whether this is optimum | |
992 | behavior (see comment at struct linetable in symtab.h). */ | |
993 | return ln1->line - ln2->line; | |
994 | } | |
995 | \f | |
43f3e411 DE |
996 | /* See buildsym.h. */ |
997 | ||
998 | struct compunit_symtab * | |
999 | buildsym_compunit_symtab (void) | |
1000 | { | |
1001 | gdb_assert (buildsym_compunit != NULL); | |
1002 | ||
1003 | return buildsym_compunit->compunit_symtab; | |
1004 | } | |
1005 | ||
1006 | /* See buildsym.h. */ | |
fc474241 DE |
1007 | |
1008 | struct macro_table * | |
43f3e411 | 1009 | get_macro_table (void) |
fc474241 | 1010 | { |
43f3e411 DE |
1011 | struct objfile *objfile; |
1012 | ||
1013 | gdb_assert (buildsym_compunit != NULL); | |
6a976300 | 1014 | return buildsym_compunit->get_macro_table (); |
fc474241 DE |
1015 | } |
1016 | \f | |
0ab9ce85 DE |
1017 | /* Init state to prepare for building a symtab. |
1018 | Note: This can't be done in buildsym_init because dbxread.c and xcoffread.c | |
1019 | can call start_symtab+end_symtab multiple times after one call to | |
1020 | buildsym_init. */ | |
1021 | ||
1022 | static void | |
2c99ee5c | 1023 | prepare_for_building () |
0ab9ce85 | 1024 | { |
0ab9ce85 | 1025 | local_symbols = NULL; |
0ab9ce85 | 1026 | |
0ab9ce85 | 1027 | /* These should have been reset either by successful completion of building |
33c7c59d | 1028 | a symtab, or by the scoped_free_pendings destructor. */ |
0ab9ce85 DE |
1029 | gdb_assert (file_symbols == NULL); |
1030 | gdb_assert (global_symbols == NULL); | |
e62cca7c | 1031 | gdb_assert (buildsym_compunit == nullptr); |
0ab9ce85 DE |
1032 | } |
1033 | ||
4d663531 | 1034 | /* Start a new symtab for a new source file in OBJFILE. Called, for example, |
c906108c SS |
1035 | when a stabs symbol of type N_SO is seen, or when a DWARF |
1036 | TAG_compile_unit DIE is seen. It indicates the start of data for | |
0b0287a1 DE |
1037 | one original source file. |
1038 | ||
5ffa0793 PA |
1039 | NAME is the name of the file (cannot be NULL). COMP_DIR is the |
1040 | directory in which the file was compiled (or NULL if not known). | |
1041 | START_ADDR is the lowest address of objects in the file (or 0 if | |
1042 | not known). LANGUAGE is the language of the source file, or | |
1043 | language_unknown if not known, in which case it'll be deduced from | |
1044 | the filename. */ | |
c906108c | 1045 | |
43f3e411 | 1046 | struct compunit_symtab * |
4d663531 | 1047 | start_symtab (struct objfile *objfile, const char *name, const char *comp_dir, |
5ffa0793 | 1048 | CORE_ADDR start_addr, enum language language) |
c906108c | 1049 | { |
2c99ee5c | 1050 | prepare_for_building (); |
43f3e411 | 1051 | |
c0015d44 | 1052 | buildsym_compunit = new struct buildsym_compunit (objfile, name, comp_dir, |
2c99ee5c | 1053 | language, start_addr); |
43f3e411 | 1054 | |
0ab9ce85 | 1055 | /* Allocate the compunit symtab now. The caller needs it to allocate |
43f3e411 DE |
1056 | non-primary symtabs. It is also needed by get_macro_table. */ |
1057 | buildsym_compunit->compunit_symtab = allocate_compunit_symtab (objfile, | |
1058 | name); | |
1059 | ||
1060 | /* Build the subfile for NAME (the main source file) so that we can record | |
1061 | a pointer to it for later. | |
1062 | IMPORTANT: Do not allocate a struct symtab for NAME here. | |
1063 | It can happen that the debug info provides a different path to NAME than | |
1064 | DIRNAME,NAME. We cope with this in watch_main_source_file_lossage but | |
1065 | that only works if the main_subfile doesn't have a symtab yet. */ | |
4d663531 | 1066 | start_subfile (name); |
7bab9b58 DE |
1067 | /* Save this so that we don't have to go looking for it at the end |
1068 | of the subfiles list. */ | |
3c65e5b3 | 1069 | buildsym_compunit->main_subfile = buildsym_compunit->m_current_subfile; |
43f3e411 | 1070 | |
43f3e411 | 1071 | return buildsym_compunit->compunit_symtab; |
6d30eef8 DE |
1072 | } |
1073 | ||
1074 | /* Restart compilation for a symtab. | |
0ab9ce85 DE |
1075 | CUST is the result of end_expandable_symtab. |
1076 | NAME, START_ADDR are the source file we are resuming with. | |
1077 | ||
6d30eef8 | 1078 | This is used when a symtab is built from multiple sources. |
0ab9ce85 DE |
1079 | The symtab is first built with start_symtab/end_expandable_symtab |
1080 | and then for each additional piece call restart_symtab/augment_*_symtab. | |
1081 | Note: At the moment there is only augment_type_symtab. */ | |
6d30eef8 DE |
1082 | |
1083 | void | |
0ab9ce85 DE |
1084 | restart_symtab (struct compunit_symtab *cust, |
1085 | const char *name, CORE_ADDR start_addr) | |
6d30eef8 | 1086 | { |
2c99ee5c | 1087 | prepare_for_building (); |
c906108c | 1088 | |
b248663f TT |
1089 | buildsym_compunit |
1090 | = new struct buildsym_compunit (COMPUNIT_OBJFILE (cust), | |
c0015d44 | 1091 | name, |
b248663f | 1092 | COMPUNIT_DIRNAME (cust), |
2c99ee5c TT |
1093 | compunit_language (cust), |
1094 | start_addr); | |
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 | { | |
0ab9ce85 DE |
1180 | local_symbols = NULL; |
1181 | file_symbols = NULL; | |
1182 | global_symbols = NULL; | |
1183 | ||
0ab9ce85 | 1184 | free_buildsym_compunit (); |
6d30eef8 DE |
1185 | } |
1186 | ||
4359dff1 JK |
1187 | /* Implementation of the first part of end_symtab. It allows modifying |
1188 | STATIC_BLOCK before it gets finalized by end_symtab_from_static_block. | |
1189 | If the returned value is NULL there is no blockvector created for | |
1190 | this symtab (you still must call end_symtab_from_static_block). | |
c906108c | 1191 | |
4359dff1 JK |
1192 | END_ADDR is the same as for end_symtab: the address of the end of the |
1193 | file's text. | |
c906108c | 1194 | |
4359dff1 | 1195 | If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made |
36586728 TT |
1196 | expandable. |
1197 | ||
1198 | If REQUIRED is non-zero, then a symtab is created even if it does | |
1199 | not contain any symbols. */ | |
6d30eef8 | 1200 | |
4359dff1 | 1201 | struct block * |
4d663531 | 1202 | end_symtab_get_static_block (CORE_ADDR end_addr, int expandable, int required) |
c906108c | 1203 | { |
43f3e411 | 1204 | struct objfile *objfile = buildsym_compunit->objfile; |
4d663531 | 1205 | |
c906108c SS |
1206 | /* Finish the lexical context of the last function in the file; pop |
1207 | the context stack. */ | |
1208 | ||
a60f3166 | 1209 | if (!buildsym_compunit->m_context_stack.empty ()) |
c906108c | 1210 | { |
a60f3166 | 1211 | struct context_stack cstk = pop_context (); |
4359dff1 | 1212 | |
c906108c | 1213 | /* Make a block for the local symbols within. */ |
a60f3166 TT |
1214 | finish_block (cstk.name, &local_symbols, cstk.old_blocks, NULL, |
1215 | cstk.start_addr, end_addr); | |
c906108c | 1216 | |
a60f3166 | 1217 | if (!buildsym_compunit->m_context_stack.empty ()) |
c906108c SS |
1218 | { |
1219 | /* This is said to happen with SCO. The old coffread.c | |
1220 | code simply emptied the context stack, so we do the | |
1221 | same. FIXME: Find out why it is happening. This is not | |
1222 | believed to happen in most cases (even for coffread.c); | |
1223 | it used to be an abort(). */ | |
b98664d3 | 1224 | complaint (_("Context stack not empty in end_symtab")); |
a60f3166 | 1225 | buildsym_compunit->m_context_stack.clear (); |
c906108c SS |
1226 | } |
1227 | } | |
1228 | ||
1229 | /* Reordered executables may have out of order pending blocks; if | |
1230 | OBJF_REORDERED is true, then sort the pending blocks. */ | |
6d30eef8 | 1231 | |
c906108c SS |
1232 | if ((objfile->flags & OBJF_REORDERED) && pending_blocks) |
1233 | { | |
07e7f39f | 1234 | struct pending_block *pb; |
c906108c | 1235 | |
b05628f0 | 1236 | std::vector<block *> barray; |
c906108c | 1237 | |
07e7f39f | 1238 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1239 | barray.push_back (pb->block); |
07e7f39f | 1240 | |
5033013f UW |
1241 | /* Sort blocks by start address in descending order. Blocks with the |
1242 | same start address must remain in the original order to preserve | |
1243 | inline function caller/callee relationships. */ | |
1244 | std::stable_sort (barray.begin (), barray.end (), | |
1245 | [] (const block *a, const block *b) | |
1246 | { | |
1247 | return BLOCK_START (a) > BLOCK_START (b); | |
1248 | }); | |
07e7f39f | 1249 | |
b05628f0 | 1250 | int i = 0; |
07e7f39f | 1251 | for (pb = pending_blocks; pb != NULL; pb = pb->next) |
b05628f0 | 1252 | pb->block = barray[i++]; |
c906108c SS |
1253 | } |
1254 | ||
1255 | /* Cleanup any undefined types that have been left hanging around | |
1256 | (this needs to be done before the finish_blocks so that | |
1257 | file_symbols is still good). | |
c5aa993b | 1258 | |
0a0edcd5 | 1259 | Both cleanup_undefined_stabs_types and finish_global_stabs are stabs |
c906108c SS |
1260 | specific, but harmless for other symbol readers, since on gdb |
1261 | startup or when finished reading stabs, the state is set so these | |
1262 | are no-ops. FIXME: Is this handled right in case of QUIT? Can | |
1263 | we make this cleaner? */ | |
1264 | ||
0a0edcd5 | 1265 | cleanup_undefined_stabs_types (objfile); |
c906108c SS |
1266 | finish_global_stabs (objfile); |
1267 | ||
36586728 TT |
1268 | if (!required |
1269 | && pending_blocks == NULL | |
c906108c SS |
1270 | && file_symbols == NULL |
1271 | && global_symbols == NULL | |
530fedbc | 1272 | && !buildsym_compunit->m_have_line_numbers |
6a976300 | 1273 | && buildsym_compunit->m_pending_macros == NULL |
6cccc9a8 | 1274 | && buildsym_compunit->m_global_using_directives == NULL) |
c906108c | 1275 | { |
4359dff1 JK |
1276 | /* Ignore symtabs that have no functions with real debugging info. */ |
1277 | return NULL; | |
1278 | } | |
1279 | else | |
1280 | { | |
1281 | /* Define the STATIC_BLOCK. */ | |
63e43d3a | 1282 | return finish_block_internal (NULL, &file_symbols, NULL, NULL, |
2c99ee5c TT |
1283 | buildsym_compunit->m_last_source_start_addr, |
1284 | end_addr, 0, expandable); | |
4359dff1 JK |
1285 | } |
1286 | } | |
1287 | ||
7bab9b58 DE |
1288 | /* Subroutine of end_symtab_from_static_block to simplify it. |
1289 | Handle the "have blockvector" case. | |
1290 | See end_symtab_from_static_block for a description of the arguments. */ | |
1291 | ||
43f3e411 | 1292 | static struct compunit_symtab * |
7bab9b58 | 1293 | end_symtab_with_blockvector (struct block *static_block, |
4d663531 | 1294 | int section, int expandable) |
4359dff1 | 1295 | { |
43f3e411 DE |
1296 | struct objfile *objfile = buildsym_compunit->objfile; |
1297 | struct compunit_symtab *cu = buildsym_compunit->compunit_symtab; | |
7bab9b58 | 1298 | struct symtab *symtab; |
4359dff1 JK |
1299 | struct blockvector *blockvector; |
1300 | struct subfile *subfile; | |
7bab9b58 | 1301 | CORE_ADDR end_addr; |
4359dff1 | 1302 | |
7bab9b58 | 1303 | gdb_assert (static_block != NULL); |
43f3e411 DE |
1304 | gdb_assert (buildsym_compunit != NULL); |
1305 | gdb_assert (buildsym_compunit->subfiles != NULL); | |
7bab9b58 DE |
1306 | |
1307 | end_addr = BLOCK_END (static_block); | |
1308 | ||
1309 | /* Create the GLOBAL_BLOCK and build the blockvector. */ | |
63e43d3a | 1310 | finish_block_internal (NULL, &global_symbols, NULL, NULL, |
2c99ee5c | 1311 | buildsym_compunit->m_last_source_start_addr, end_addr, |
7bab9b58 | 1312 | 1, expandable); |
43f3e411 | 1313 | blockvector = make_blockvector (); |
c906108c | 1314 | |
f56ce883 DE |
1315 | /* Read the line table if it has to be read separately. |
1316 | This is only used by xcoffread.c. */ | |
c295b2e5 | 1317 | if (objfile->sf->sym_read_linetable != NULL) |
f56ce883 | 1318 | objfile->sf->sym_read_linetable (objfile); |
c906108c | 1319 | |
4584e32e DE |
1320 | /* Handle the case where the debug info specifies a different path |
1321 | for the main source file. It can cause us to lose track of its | |
1322 | line number information. */ | |
1323 | watch_main_source_file_lossage (); | |
1324 | ||
43f3e411 DE |
1325 | /* Now create the symtab objects proper, if not already done, |
1326 | one for each subfile. */ | |
c906108c | 1327 | |
43f3e411 DE |
1328 | for (subfile = buildsym_compunit->subfiles; |
1329 | subfile != NULL; | |
1330 | subfile = subfile->next) | |
c906108c SS |
1331 | { |
1332 | int linetablesize = 0; | |
c906108c | 1333 | |
7bab9b58 | 1334 | if (subfile->line_vector) |
c906108c | 1335 | { |
7bab9b58 DE |
1336 | linetablesize = sizeof (struct linetable) + |
1337 | subfile->line_vector->nitems * sizeof (struct linetable_entry); | |
1338 | ||
1339 | /* Like the pending blocks, the line table may be | |
1340 | scrambled in reordered executables. Sort it if | |
1341 | OBJF_REORDERED is true. */ | |
1342 | if (objfile->flags & OBJF_REORDERED) | |
1343 | qsort (subfile->line_vector->item, | |
1344 | subfile->line_vector->nitems, | |
1345 | sizeof (struct linetable_entry), compare_line_numbers); | |
1346 | } | |
9182c5bc | 1347 | |
7bab9b58 DE |
1348 | /* Allocate a symbol table if necessary. */ |
1349 | if (subfile->symtab == NULL) | |
43f3e411 | 1350 | subfile->symtab = allocate_symtab (cu, subfile->name); |
7bab9b58 | 1351 | symtab = subfile->symtab; |
9182c5bc | 1352 | |
7bab9b58 | 1353 | /* Fill in its components. */ |
43f3e411 | 1354 | |
7bab9b58 DE |
1355 | if (subfile->line_vector) |
1356 | { | |
1357 | /* Reallocate the line table on the symbol obstack. */ | |
8435453b | 1358 | SYMTAB_LINETABLE (symtab) = (struct linetable *) |
7bab9b58 | 1359 | obstack_alloc (&objfile->objfile_obstack, linetablesize); |
8435453b DE |
1360 | memcpy (SYMTAB_LINETABLE (symtab), subfile->line_vector, |
1361 | linetablesize); | |
c906108c | 1362 | } |
24be086d | 1363 | else |
c906108c | 1364 | { |
8435453b | 1365 | SYMTAB_LINETABLE (symtab) = NULL; |
c906108c | 1366 | } |
c906108c | 1367 | |
7bab9b58 DE |
1368 | /* Use whatever language we have been using for this |
1369 | subfile, not the one that was deduced in allocate_symtab | |
1370 | from the filename. We already did our own deducing when | |
1371 | we created the subfile, and we may have altered our | |
1372 | opinion of what language it is from things we found in | |
1373 | the symbols. */ | |
1374 | symtab->language = subfile->language; | |
43f3e411 | 1375 | } |
c906108c | 1376 | |
43f3e411 DE |
1377 | /* Make sure the symtab of main_subfile is the first in its list. */ |
1378 | { | |
1379 | struct symtab *main_symtab, *prev_symtab; | |
1380 | ||
1381 | main_symtab = buildsym_compunit->main_subfile->symtab; | |
1382 | prev_symtab = NULL; | |
1383 | ALL_COMPUNIT_FILETABS (cu, symtab) | |
1384 | { | |
1385 | if (symtab == main_symtab) | |
1386 | { | |
1387 | if (prev_symtab != NULL) | |
1388 | { | |
1389 | prev_symtab->next = main_symtab->next; | |
1390 | main_symtab->next = COMPUNIT_FILETABS (cu); | |
1391 | COMPUNIT_FILETABS (cu) = main_symtab; | |
1392 | } | |
1393 | break; | |
1394 | } | |
1395 | prev_symtab = symtab; | |
1396 | } | |
1397 | gdb_assert (main_symtab == COMPUNIT_FILETABS (cu)); | |
1398 | } | |
84a146c9 | 1399 | |
0ab9ce85 | 1400 | /* Fill out the compunit symtab. */ |
84a146c9 | 1401 | |
43f3e411 DE |
1402 | if (buildsym_compunit->comp_dir != NULL) |
1403 | { | |
1404 | /* Reallocate the dirname on the symbol obstack. */ | |
905eb0e2 | 1405 | const char *comp_dir = buildsym_compunit->comp_dir.get (); |
43f3e411 | 1406 | COMPUNIT_DIRNAME (cu) |
224c3ddb | 1407 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
905eb0e2 | 1408 | comp_dir, strlen (comp_dir)); |
c906108c SS |
1409 | } |
1410 | ||
43f3e411 DE |
1411 | /* Save the debug format string (if any) in the symtab. */ |
1412 | COMPUNIT_DEBUGFORMAT (cu) = buildsym_compunit->debugformat; | |
1413 | ||
1414 | /* Similarly for the producer. */ | |
1415 | COMPUNIT_PRODUCER (cu) = buildsym_compunit->producer; | |
1416 | ||
1417 | COMPUNIT_BLOCKVECTOR (cu) = blockvector; | |
7bab9b58 | 1418 | { |
43f3e411 | 1419 | struct block *b = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); |
cb1df416 | 1420 | |
43f3e411 | 1421 | set_block_compunit_symtab (b, cu); |
7bab9b58 | 1422 | } |
cb1df416 | 1423 | |
43f3e411 DE |
1424 | COMPUNIT_BLOCK_LINE_SECTION (cu) = section; |
1425 | ||
6a976300 | 1426 | COMPUNIT_MACRO_TABLE (cu) = buildsym_compunit->release_macros (); |
43f3e411 | 1427 | |
7bab9b58 DE |
1428 | /* Default any symbols without a specified symtab to the primary symtab. */ |
1429 | { | |
1430 | int block_i; | |
1431 | ||
43f3e411 DE |
1432 | /* The main source file's symtab. */ |
1433 | symtab = COMPUNIT_FILETABS (cu); | |
1434 | ||
7bab9b58 DE |
1435 | for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++) |
1436 | { | |
1437 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i); | |
1438 | struct symbol *sym; | |
1439 | struct dict_iterator iter; | |
1440 | ||
1441 | /* Inlined functions may have symbols not in the global or | |
1442 | static symbol lists. */ | |
1443 | if (BLOCK_FUNCTION (block) != NULL) | |
08be3fe3 DE |
1444 | if (symbol_symtab (BLOCK_FUNCTION (block)) == NULL) |
1445 | symbol_set_symtab (BLOCK_FUNCTION (block), symtab); | |
7bab9b58 DE |
1446 | |
1447 | /* Note that we only want to fix up symbols from the local | |
1448 | blocks, not blocks coming from included symtabs. That is why | |
1449 | we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */ | |
1450 | ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym) | |
08be3fe3 DE |
1451 | if (symbol_symtab (sym) == NULL) |
1452 | symbol_set_symtab (sym, symtab); | |
7bab9b58 DE |
1453 | } |
1454 | } | |
edb3359d | 1455 | |
43f3e411 | 1456 | add_compunit_symtab_to_objfile (cu); |
43f3e411 DE |
1457 | |
1458 | return cu; | |
7bab9b58 DE |
1459 | } |
1460 | ||
1461 | /* Implementation of the second part of end_symtab. Pass STATIC_BLOCK | |
1462 | as value returned by end_symtab_get_static_block. | |
1463 | ||
1464 | SECTION is the same as for end_symtab: the section number | |
1465 | (in objfile->section_offsets) of the blockvector and linetable. | |
1466 | ||
1467 | If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made | |
1468 | expandable. */ | |
1469 | ||
43f3e411 | 1470 | struct compunit_symtab * |
7bab9b58 | 1471 | end_symtab_from_static_block (struct block *static_block, |
4d663531 | 1472 | int section, int expandable) |
7bab9b58 | 1473 | { |
43f3e411 | 1474 | struct compunit_symtab *cu; |
7bab9b58 DE |
1475 | |
1476 | if (static_block == NULL) | |
1477 | { | |
0ab9ce85 DE |
1478 | /* Handle the "no blockvector" case. |
1479 | When this happens there is nothing to record, so there's nothing | |
1480 | to do: memory will be freed up later. | |
1481 | ||
1482 | Note: We won't be adding a compunit to the objfile's list of | |
1483 | compunits, so there's nothing to unchain. However, since each symtab | |
1484 | is added to the objfile's obstack we can't free that space. | |
1485 | We could do better, but this is believed to be a sufficiently rare | |
1486 | event. */ | |
43f3e411 | 1487 | cu = NULL; |
7bab9b58 DE |
1488 | } |
1489 | else | |
43f3e411 | 1490 | cu = end_symtab_with_blockvector (static_block, section, expandable); |
cb1df416 | 1491 | |
6d30eef8 DE |
1492 | reset_symtab_globals (); |
1493 | ||
43f3e411 | 1494 | return cu; |
6d30eef8 DE |
1495 | } |
1496 | ||
4359dff1 JK |
1497 | /* Finish the symbol definitions for one main source file, close off |
1498 | all the lexical contexts for that file (creating struct block's for | |
1499 | them), then make the struct symtab for that file and put it in the | |
1500 | list of all such. | |
1501 | ||
1502 | END_ADDR is the address of the end of the file's text. SECTION is | |
1503 | the section number (in objfile->section_offsets) of the blockvector | |
1504 | and linetable. | |
1505 | ||
1506 | Note that it is possible for end_symtab() to return NULL. In | |
1507 | particular, for the DWARF case at least, it will return NULL when | |
1508 | it finds a compilation unit that has exactly one DIE, a | |
1509 | TAG_compile_unit DIE. This can happen when we link in an object | |
1510 | file that was compiled from an empty source file. Returning NULL | |
1511 | is probably not the correct thing to do, because then gdb will | |
1512 | never know about this empty file (FIXME). | |
1513 | ||
1514 | If you need to modify STATIC_BLOCK before it is finalized you should | |
1515 | call end_symtab_get_static_block and end_symtab_from_static_block | |
1516 | yourself. */ | |
6d30eef8 | 1517 | |
43f3e411 | 1518 | struct compunit_symtab * |
4d663531 | 1519 | end_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1520 | { |
4359dff1 JK |
1521 | struct block *static_block; |
1522 | ||
4d663531 DE |
1523 | static_block = end_symtab_get_static_block (end_addr, 0, 0); |
1524 | return end_symtab_from_static_block (static_block, section, 0); | |
6d30eef8 DE |
1525 | } |
1526 | ||
4359dff1 | 1527 | /* Same as end_symtab except create a symtab that can be later added to. */ |
6d30eef8 | 1528 | |
43f3e411 | 1529 | struct compunit_symtab * |
4d663531 | 1530 | end_expandable_symtab (CORE_ADDR end_addr, int section) |
6d30eef8 | 1531 | { |
4359dff1 JK |
1532 | struct block *static_block; |
1533 | ||
4d663531 DE |
1534 | static_block = end_symtab_get_static_block (end_addr, 1, 0); |
1535 | return end_symtab_from_static_block (static_block, section, 1); | |
6d30eef8 DE |
1536 | } |
1537 | ||
1538 | /* Subroutine of augment_type_symtab to simplify it. | |
43f3e411 DE |
1539 | Attach the main source file's symtab to all symbols in PENDING_LIST that |
1540 | don't have one. */ | |
6d30eef8 DE |
1541 | |
1542 | static void | |
43f3e411 DE |
1543 | set_missing_symtab (struct pending *pending_list, |
1544 | struct compunit_symtab *cu) | |
6d30eef8 DE |
1545 | { |
1546 | struct pending *pending; | |
1547 | int i; | |
1548 | ||
1549 | for (pending = pending_list; pending != NULL; pending = pending->next) | |
801e3a5b | 1550 | { |
6d30eef8 DE |
1551 | for (i = 0; i < pending->nsyms; ++i) |
1552 | { | |
08be3fe3 DE |
1553 | if (symbol_symtab (pending->symbol[i]) == NULL) |
1554 | symbol_set_symtab (pending->symbol[i], COMPUNIT_FILETABS (cu)); | |
6d30eef8 | 1555 | } |
801e3a5b | 1556 | } |
6d30eef8 | 1557 | } |
c906108c | 1558 | |
6d30eef8 DE |
1559 | /* Same as end_symtab, but for the case where we're adding more symbols |
1560 | to an existing symtab that is known to contain only type information. | |
1561 | This is the case for DWARF4 Type Units. */ | |
1562 | ||
1563 | void | |
0ab9ce85 | 1564 | augment_type_symtab (void) |
6d30eef8 | 1565 | { |
0ab9ce85 | 1566 | struct compunit_symtab *cust = buildsym_compunit->compunit_symtab; |
43f3e411 | 1567 | const struct blockvector *blockvector = COMPUNIT_BLOCKVECTOR (cust); |
6d30eef8 | 1568 | |
a60f3166 TT |
1569 | if (!buildsym_compunit->m_context_stack.empty ()) |
1570 | complaint (_("Context stack not empty in augment_type_symtab")); | |
6d30eef8 | 1571 | if (pending_blocks != NULL) |
b98664d3 | 1572 | complaint (_("Blocks in a type symtab")); |
6a976300 | 1573 | if (buildsym_compunit->m_pending_macros != NULL) |
b98664d3 | 1574 | complaint (_("Macro in a type symtab")); |
530fedbc | 1575 | if (buildsym_compunit->m_have_line_numbers) |
b98664d3 | 1576 | complaint (_("Line numbers recorded in a type symtab")); |
6d30eef8 DE |
1577 | |
1578 | if (file_symbols != NULL) | |
1579 | { | |
1580 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK); | |
1581 | ||
1582 | /* First mark any symbols without a specified symtab as belonging | |
1583 | to the primary symtab. */ | |
43f3e411 | 1584 | set_missing_symtab (file_symbols, cust); |
6d30eef8 DE |
1585 | |
1586 | dict_add_pending (BLOCK_DICT (block), file_symbols); | |
1587 | } | |
1588 | ||
1589 | if (global_symbols != NULL) | |
1590 | { | |
1591 | struct block *block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK); | |
1592 | ||
1593 | /* First mark any symbols without a specified symtab as belonging | |
1594 | to the primary symtab. */ | |
43f3e411 | 1595 | set_missing_symtab (global_symbols, cust); |
6d30eef8 DE |
1596 | |
1597 | dict_add_pending (BLOCK_DICT (block), global_symbols); | |
1598 | } | |
1599 | ||
1600 | reset_symtab_globals (); | |
c906108c SS |
1601 | } |
1602 | ||
1603 | /* Push a context block. Args are an identifying nesting level | |
1604 | (checkable when you pop it), and the starting PC address of this | |
1605 | context. */ | |
1606 | ||
1607 | struct context_stack * | |
1608 | push_context (int desc, CORE_ADDR valu) | |
1609 | { | |
a60f3166 | 1610 | gdb_assert (buildsym_compunit != nullptr); |
c906108c | 1611 | |
a60f3166 TT |
1612 | buildsym_compunit->m_context_stack.emplace_back (); |
1613 | struct context_stack *newobj = &buildsym_compunit->m_context_stack.back (); | |
c906108c | 1614 | |
fe978cb0 PA |
1615 | newobj->depth = desc; |
1616 | newobj->locals = local_symbols; | |
1617 | newobj->old_blocks = pending_blocks; | |
1618 | newobj->start_addr = valu; | |
6cccc9a8 TT |
1619 | newobj->local_using_directives |
1620 | = buildsym_compunit->m_local_using_directives; | |
fe978cb0 | 1621 | newobj->name = NULL; |
c906108c SS |
1622 | |
1623 | local_symbols = NULL; | |
6cccc9a8 | 1624 | buildsym_compunit->m_local_using_directives = NULL; |
c906108c | 1625 | |
fe978cb0 | 1626 | return newobj; |
c906108c | 1627 | } |
0c5e171a | 1628 | |
a672ef13 | 1629 | /* Pop a context block. Returns the address of the context block just |
4a64f543 | 1630 | popped. */ |
a672ef13 | 1631 | |
a60f3166 TT |
1632 | struct context_stack |
1633 | pop_context () | |
0c5e171a | 1634 | { |
a60f3166 TT |
1635 | gdb_assert (buildsym_compunit != nullptr); |
1636 | gdb_assert (!buildsym_compunit->m_context_stack.empty ()); | |
1637 | struct context_stack result = buildsym_compunit->m_context_stack.back (); | |
1638 | buildsym_compunit->m_context_stack.pop_back (); | |
1639 | return result; | |
0c5e171a KD |
1640 | } |
1641 | ||
c906108c | 1642 | \f |
357e46e7 | 1643 | |
c906108c | 1644 | void |
554d387d | 1645 | record_debugformat (const char *format) |
c906108c | 1646 | { |
43f3e411 | 1647 | buildsym_compunit->debugformat = format; |
c906108c SS |
1648 | } |
1649 | ||
303b6f5d DJ |
1650 | void |
1651 | record_producer (const char *producer) | |
1652 | { | |
43f3e411 | 1653 | buildsym_compunit->producer = producer; |
303b6f5d DJ |
1654 | } |
1655 | ||
c906108c | 1656 | \f |
46212e0b | 1657 | |
46212e0b TT |
1658 | /* See buildsym.h. */ |
1659 | ||
1660 | void | |
1661 | set_last_source_file (const char *name) | |
1662 | { | |
c0015d44 TT |
1663 | gdb_assert (buildsym_compunit != nullptr || name == nullptr); |
1664 | if (buildsym_compunit != nullptr) | |
1665 | buildsym_compunit->set_last_source_file (name); | |
46212e0b TT |
1666 | } |
1667 | ||
1668 | /* See buildsym.h. */ | |
1669 | ||
1670 | const char * | |
1671 | get_last_source_file (void) | |
1672 | { | |
c0015d44 TT |
1673 | if (buildsym_compunit == nullptr) |
1674 | return nullptr; | |
1675 | return buildsym_compunit->m_last_source_file.get (); | |
46212e0b TT |
1676 | } |
1677 | ||
2c99ee5c TT |
1678 | /* See buildsym.h. */ |
1679 | ||
1680 | void | |
1681 | set_last_source_start_addr (CORE_ADDR addr) | |
1682 | { | |
1683 | gdb_assert (buildsym_compunit != nullptr); | |
1684 | buildsym_compunit->m_last_source_start_addr = addr; | |
1685 | } | |
1686 | ||
1687 | /* See buildsym.h. */ | |
1688 | ||
1689 | CORE_ADDR | |
1690 | get_last_source_start_addr () | |
1691 | { | |
1692 | gdb_assert (buildsym_compunit != nullptr); | |
1693 | return buildsym_compunit->m_last_source_start_addr; | |
1694 | } | |
1695 | ||
6cccc9a8 TT |
1696 | /* See buildsym.h. */ |
1697 | ||
1698 | struct using_direct ** | |
1699 | get_local_using_directives () | |
1700 | { | |
1701 | gdb_assert (buildsym_compunit != nullptr); | |
1702 | return &buildsym_compunit->m_local_using_directives; | |
1703 | } | |
1704 | ||
1705 | /* See buildsym.h. */ | |
1706 | ||
1707 | void | |
1708 | set_local_using_directives (struct using_direct *new_local) | |
1709 | { | |
1710 | gdb_assert (buildsym_compunit != nullptr); | |
1711 | buildsym_compunit->m_local_using_directives = new_local; | |
1712 | } | |
1713 | ||
1714 | /* See buildsym.h. */ | |
1715 | ||
1716 | struct using_direct ** | |
1717 | get_global_using_directives () | |
1718 | { | |
1719 | gdb_assert (buildsym_compunit != nullptr); | |
1720 | return &buildsym_compunit->m_global_using_directives; | |
1721 | } | |
1722 | ||
a60f3166 TT |
1723 | /* See buildsym.h. */ |
1724 | ||
1725 | bool | |
1726 | outermost_context_p () | |
1727 | { | |
1728 | gdb_assert (buildsym_compunit != nullptr); | |
1729 | return buildsym_compunit->m_context_stack.empty (); | |
1730 | } | |
1731 | ||
1732 | /* See buildsym.h. */ | |
1733 | ||
1734 | struct context_stack * | |
1735 | get_current_context_stack () | |
1736 | { | |
1737 | gdb_assert (buildsym_compunit != nullptr); | |
1738 | if (buildsym_compunit->m_context_stack.empty ()) | |
1739 | return nullptr; | |
1740 | return &buildsym_compunit->m_context_stack.back (); | |
1741 | } | |
1742 | ||
1743 | /* See buildsym.h. */ | |
1744 | ||
1745 | int | |
1746 | get_context_stack_depth () | |
1747 | { | |
1748 | gdb_assert (buildsym_compunit != nullptr); | |
1749 | return buildsym_compunit->m_context_stack.size (); | |
1750 | } | |
1751 | ||
3c65e5b3 TT |
1752 | /* See buildsym.h. */ |
1753 | ||
1754 | struct subfile * | |
1755 | get_current_subfile () | |
1756 | { | |
1757 | gdb_assert (buildsym_compunit != nullptr); | |
1758 | return buildsym_compunit->m_current_subfile; | |
1759 | } | |
1760 | ||
46212e0b TT |
1761 | \f |
1762 | ||
c906108c SS |
1763 | /* Initialize anything that needs initializing when starting to read a |
1764 | fresh piece of a symbol file, e.g. reading in the stuff | |
1765 | corresponding to a psymtab. */ | |
1766 | ||
1767 | void | |
2c722d18 | 1768 | buildsym_init () |
c906108c | 1769 | { |
33c7c59d | 1770 | /* Ensure the scoped_free_pendings destructor was called after |
0ab9ce85 DE |
1771 | the last time. */ |
1772 | gdb_assert (free_pendings == NULL); | |
1773 | gdb_assert (pending_blocks == NULL); | |
1774 | gdb_assert (file_symbols == NULL); | |
1775 | gdb_assert (global_symbols == NULL); | |
0ab9ce85 | 1776 | gdb_assert (buildsym_compunit == NULL); |
c906108c | 1777 | } |