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c1027032 CC |
1 | // gdb-index.cc -- generate .gdb_index section for fast debug lookup |
2 | ||
3 | // Copyright 2012 Free Software Foundation, Inc. | |
4 | // Written by Cary Coutant <ccoutant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | #include "gold.h" | |
24 | ||
25 | #include "gdb-index.h" | |
26 | #include "dwarf_reader.h" | |
27 | #include "dwarf.h" | |
28 | #include "object.h" | |
29 | #include "output.h" | |
30 | #include "demangle.h" | |
31 | ||
32 | namespace gold | |
33 | { | |
34 | ||
35 | const int gdb_index_version = 5; | |
36 | ||
37 | // Sizes of various records in the .gdb_index section. | |
38 | const int gdb_index_offset_size = 4; | |
39 | const int gdb_index_hdr_size = 6 * gdb_index_offset_size; | |
40 | const int gdb_index_cu_size = 16; | |
41 | const int gdb_index_tu_size = 24; | |
42 | const int gdb_index_addr_size = 16 + gdb_index_offset_size; | |
43 | const int gdb_index_sym_size = 2 * gdb_index_offset_size; | |
44 | ||
45 | // This class manages the hashed symbol table for the .gdb_index section. | |
46 | // It is essentially equivalent to the hashtab implementation in libiberty, | |
47 | // but is copied into gdb sources and here for compatibility because its | |
48 | // data structure is exposed on disk. | |
49 | ||
50 | template <typename T> | |
51 | class Gdb_hashtab | |
52 | { | |
53 | public: | |
54 | Gdb_hashtab() | |
55 | : size_(0), capacity_(0), hashtab_(NULL) | |
56 | { } | |
57 | ||
58 | ~Gdb_hashtab() | |
59 | { | |
60 | for (size_t i = 0; i < this->capacity_; ++i) | |
61 | if (this->hashtab_[i] != NULL) | |
62 | delete this->hashtab_[i]; | |
63 | delete[] this->hashtab_; | |
64 | } | |
65 | ||
66 | // Add a symbol. | |
67 | T* | |
68 | add(T* symbol) | |
69 | { | |
70 | // Resize the hash table if necessary. | |
71 | if (4 * this->size_ / 3 >= this->capacity_) | |
72 | this->expand(); | |
73 | ||
74 | T** slot = this->find_slot(symbol); | |
75 | if (*slot == NULL) | |
76 | { | |
77 | ++this->size_; | |
78 | *slot = symbol; | |
79 | } | |
80 | ||
81 | return *slot; | |
82 | } | |
83 | ||
84 | // Return the current size. | |
85 | size_t | |
86 | size() const | |
87 | { return this->size_; } | |
88 | ||
89 | // Return the current capacity. | |
90 | size_t | |
91 | capacity() const | |
92 | { return this->capacity_; } | |
93 | ||
94 | // Return the contents of slot N. | |
95 | T* | |
96 | operator[](size_t n) | |
97 | { return this->hashtab_[n]; } | |
98 | ||
99 | private: | |
100 | // Find a symbol in the hash table, or return an empty slot if | |
101 | // the symbol is not in the table. | |
102 | T** | |
103 | find_slot(T* symbol) | |
104 | { | |
105 | unsigned int index = symbol->hash() & (this->capacity_ - 1); | |
106 | unsigned int step = ((symbol->hash() * 17) & (this->capacity_ - 1)) | 1; | |
107 | ||
108 | for (;;) | |
109 | { | |
110 | if (this->hashtab_[index] == NULL | |
111 | || this->hashtab_[index]->equal(symbol)) | |
112 | return &this->hashtab_[index]; | |
113 | index = (index + step) & (this->capacity_ - 1); | |
114 | } | |
115 | } | |
116 | ||
117 | // Expand the hash table. | |
118 | void | |
119 | expand() | |
120 | { | |
121 | if (this->capacity_ == 0) | |
122 | { | |
123 | // Allocate the hash table for the first time. | |
124 | this->capacity_ = Gdb_hashtab::initial_size; | |
125 | this->hashtab_ = new T*[this->capacity_]; | |
126 | memset(this->hashtab_, 0, this->capacity_ * sizeof(T*)); | |
127 | } | |
128 | else | |
129 | { | |
130 | // Expand and rehash. | |
131 | unsigned int old_cap = this->capacity_; | |
132 | T** old_hashtab = this->hashtab_; | |
133 | this->capacity_ *= 2; | |
134 | this->hashtab_ = new T*[this->capacity_]; | |
135 | memset(this->hashtab_, 0, this->capacity_ * sizeof(T*)); | |
136 | for (size_t i = 0; i < old_cap; ++i) | |
137 | { | |
138 | if (old_hashtab[i] != NULL) | |
139 | { | |
140 | T** slot = this->find_slot(old_hashtab[i]); | |
141 | *slot = old_hashtab[i]; | |
142 | } | |
143 | } | |
144 | delete[] old_hashtab; | |
145 | } | |
146 | } | |
147 | ||
148 | // Initial size of the hash table; must be a power of 2. | |
149 | static const int initial_size = 1024; | |
150 | size_t size_; | |
151 | size_t capacity_; | |
152 | T** hashtab_; | |
153 | }; | |
154 | ||
155 | // The hash function for strings in the mapped index. This is copied | |
156 | // directly from gdb/dwarf2read.c. | |
157 | ||
158 | static unsigned int | |
159 | mapped_index_string_hash(const unsigned char* str) | |
160 | { | |
161 | unsigned int r = 0; | |
162 | unsigned char c; | |
163 | ||
164 | while ((c = *str++) != 0) | |
165 | { | |
166 | if (gdb_index_version >= 5) | |
167 | c = tolower (c); | |
168 | r = r * 67 + c - 113; | |
169 | } | |
170 | ||
171 | return r; | |
172 | } | |
173 | ||
174 | // A specialization of Dwarf_info_reader, for building the .gdb_index. | |
175 | ||
176 | class Gdb_index_info_reader : public Dwarf_info_reader | |
177 | { | |
178 | public: | |
179 | Gdb_index_info_reader(bool is_type_unit, | |
180 | Relobj* object, | |
181 | const unsigned char* symbols, | |
182 | off_t symbols_size, | |
183 | unsigned int shndx, | |
184 | unsigned int reloc_shndx, | |
185 | unsigned int reloc_type, | |
186 | Gdb_index* gdb_index) | |
187 | : Dwarf_info_reader(is_type_unit, object, symbols, symbols_size, shndx, | |
188 | reloc_shndx, reloc_type), | |
189 | gdb_index_(gdb_index), cu_index_(0), cu_language_(0) | |
190 | { } | |
191 | ||
192 | ~Gdb_index_info_reader() | |
193 | { this->clear_declarations(); } | |
194 | ||
195 | // Print usage statistics. | |
196 | static void | |
197 | print_stats(); | |
198 | ||
199 | protected: | |
200 | // Visit a compilation unit. | |
201 | virtual void | |
202 | visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die*); | |
203 | ||
204 | // Visit a type unit. | |
205 | virtual void | |
e44c3715 CC |
206 | visit_type_unit(off_t tu_offset, off_t type_offset, uint64_t signature, |
207 | Dwarf_die*); | |
c1027032 CC |
208 | |
209 | private: | |
210 | // A map for recording DIEs we've seen that may be referred to be | |
211 | // later DIEs (via DW_AT_specification or DW_AT_abstract_origin). | |
212 | // The map is indexed by a DIE offset within the compile unit. | |
213 | // PARENT_OFFSET_ is the offset of the DIE that represents the | |
214 | // outer context, and NAME_ is a pointer to a component of the | |
215 | // fully-qualified name. | |
216 | // Normally, the names we point to are in a string table, so we don't | |
217 | // have to manage them, but when we have a fully-qualified name | |
218 | // computed, we put it in the table, and set PARENT_OFFSET_ to -1 | |
219 | // indicate a string that we are managing. | |
220 | struct Declaration_pair | |
221 | { | |
222 | Declaration_pair(off_t parent_offset, const char* name) | |
223 | : parent_offset_(parent_offset), name_(name) | |
224 | { } | |
225 | ||
226 | off_t parent_offset_; | |
227 | const char* name_; | |
228 | }; | |
229 | typedef Unordered_map<off_t, Declaration_pair> Declaration_map; | |
230 | ||
231 | // Visit a top-level DIE. | |
232 | void | |
233 | visit_top_die(Dwarf_die* die); | |
234 | ||
235 | // Visit the children of a DIE. | |
236 | void | |
237 | visit_children(Dwarf_die* die, Dwarf_die* context); | |
238 | ||
239 | // Visit a DIE. | |
240 | void | |
241 | visit_die(Dwarf_die* die, Dwarf_die* context); | |
242 | ||
243 | // Visit the children of a DIE. | |
244 | void | |
245 | visit_children_for_decls(Dwarf_die* die); | |
246 | ||
247 | // Visit a DIE. | |
248 | void | |
249 | visit_die_for_decls(Dwarf_die* die, Dwarf_die* context); | |
250 | ||
251 | // Guess a fully-qualified name for a class type, based on member function | |
252 | // linkage names. | |
253 | std::string | |
254 | guess_full_class_name(Dwarf_die* die); | |
255 | ||
256 | // Add a declaration DIE to the table of declarations. | |
257 | void | |
258 | add_declaration(Dwarf_die* die, Dwarf_die* context); | |
259 | ||
260 | // Add a declaration whose fully-qualified name is already known. | |
261 | void | |
262 | add_declaration_with_full_name(Dwarf_die* die, const char* full_name); | |
263 | ||
264 | // Return the context for a DIE whose parent is at DIE_OFFSET. | |
265 | std::string | |
266 | get_context(off_t die_offset); | |
267 | ||
268 | // Construct a fully-qualified name for DIE. | |
269 | std::string | |
270 | get_qualified_name(Dwarf_die* die, Dwarf_die* context); | |
271 | ||
272 | // Record the address ranges for a compilation unit. | |
273 | void | |
274 | record_cu_ranges(Dwarf_die* die); | |
275 | ||
234d4ab8 | 276 | // Wrapper for read_pubtable. |
c1027032 CC |
277 | bool |
278 | read_pubnames_and_pubtypes(Dwarf_die* die); | |
279 | ||
234d4ab8 SA |
280 | // Read the .debug_pubnames and .debug_pubtypes tables. |
281 | bool | |
282 | read_pubtable(Dwarf_pubnames_table* table, off_t offset); | |
283 | ||
c1027032 CC |
284 | // Clear the declarations map. |
285 | void | |
286 | clear_declarations(); | |
287 | ||
288 | // The Gdb_index section. | |
289 | Gdb_index* gdb_index_; | |
290 | // The current CU index (negative for a TU). | |
291 | int cu_index_; | |
292 | // The language of the current CU or TU. | |
293 | unsigned int cu_language_; | |
294 | // Map from DIE offset to (parent offset, name) pair, | |
295 | // for DW_AT_specification. | |
296 | Declaration_map declarations_; | |
297 | ||
298 | // Statistics. | |
299 | // Total number of DWARF compilation units processed. | |
300 | static unsigned int dwarf_cu_count; | |
301 | // Number of DWARF compilation units with pubnames/pubtypes. | |
302 | static unsigned int dwarf_cu_nopubnames_count; | |
303 | // Total number of DWARF type units processed. | |
304 | static unsigned int dwarf_tu_count; | |
305 | // Number of DWARF type units with pubnames/pubtypes. | |
306 | static unsigned int dwarf_tu_nopubnames_count; | |
307 | }; | |
308 | ||
309 | // Total number of DWARF compilation units processed. | |
310 | unsigned int Gdb_index_info_reader::dwarf_cu_count = 0; | |
311 | // Number of DWARF compilation units without pubnames/pubtypes. | |
312 | unsigned int Gdb_index_info_reader::dwarf_cu_nopubnames_count = 0; | |
313 | // Total number of DWARF type units processed. | |
314 | unsigned int Gdb_index_info_reader::dwarf_tu_count = 0; | |
315 | // Number of DWARF type units without pubnames/pubtypes. | |
316 | unsigned int Gdb_index_info_reader::dwarf_tu_nopubnames_count = 0; | |
317 | ||
318 | // Process a compilation unit and parse its child DIE. | |
319 | ||
320 | void | |
321 | Gdb_index_info_reader::visit_compilation_unit(off_t cu_offset, off_t cu_length, | |
322 | Dwarf_die* root_die) | |
323 | { | |
324 | ++Gdb_index_info_reader::dwarf_cu_count; | |
325 | this->cu_index_ = this->gdb_index_->add_comp_unit(cu_offset, cu_length); | |
326 | this->visit_top_die(root_die); | |
327 | } | |
328 | ||
329 | // Process a type unit and parse its child DIE. | |
330 | ||
331 | void | |
e44c3715 CC |
332 | Gdb_index_info_reader::visit_type_unit(off_t tu_offset, off_t type_offset, |
333 | uint64_t signature, Dwarf_die* root_die) | |
c1027032 CC |
334 | { |
335 | ++Gdb_index_info_reader::dwarf_tu_count; | |
336 | // Use a negative index to flag this as a TU instead of a CU. | |
337 | this->cu_index_ = -1 - this->gdb_index_->add_type_unit(tu_offset, type_offset, | |
338 | signature); | |
339 | this->visit_top_die(root_die); | |
340 | } | |
341 | ||
342 | // Process a top-level DIE. | |
343 | // For compile_unit DIEs, record the address ranges. For all | |
344 | // interesting tags, add qualified names to the symbol table | |
345 | // and process interesting children. We may need to process | |
346 | // certain children just for saving declarations that might be | |
347 | // referenced by later DIEs with a DW_AT_specification attribute. | |
348 | ||
349 | void | |
350 | Gdb_index_info_reader::visit_top_die(Dwarf_die* die) | |
351 | { | |
352 | this->clear_declarations(); | |
353 | ||
354 | switch (die->tag()) | |
355 | { | |
356 | case elfcpp::DW_TAG_compile_unit: | |
357 | case elfcpp::DW_TAG_type_unit: | |
358 | this->cu_language_ = die->int_attribute(elfcpp::DW_AT_language); | |
359 | // Check for languages that require specialized knowledge to | |
360 | // construct fully-qualified names, that we don't yet support. | |
361 | if (this->cu_language_ == elfcpp::DW_LANG_Ada83 | |
362 | || this->cu_language_ == elfcpp::DW_LANG_Fortran77 | |
363 | || this->cu_language_ == elfcpp::DW_LANG_Fortran90 | |
364 | || this->cu_language_ == elfcpp::DW_LANG_Java | |
365 | || this->cu_language_ == elfcpp::DW_LANG_Ada95 | |
366 | || this->cu_language_ == elfcpp::DW_LANG_Fortran95) | |
367 | { | |
368 | gold_warning(_("%s: --gdb-index currently supports " | |
369 | "only C and C++ languages"), | |
370 | this->object()->name().c_str()); | |
371 | return; | |
372 | } | |
373 | if (die->tag() == elfcpp::DW_TAG_compile_unit) | |
374 | this->record_cu_ranges(die); | |
375 | // If there is a pubnames and/or pubtypes section for this | |
376 | // compilation unit, use those; otherwise, parse the DWARF | |
377 | // info to extract the names. | |
378 | if (!this->read_pubnames_and_pubtypes(die)) | |
379 | { | |
380 | if (die->tag() == elfcpp::DW_TAG_compile_unit) | |
381 | ++Gdb_index_info_reader::dwarf_cu_nopubnames_count; | |
382 | else | |
383 | ++Gdb_index_info_reader::dwarf_tu_nopubnames_count; | |
384 | this->visit_children(die, NULL); | |
385 | } | |
386 | break; | |
387 | default: | |
388 | // The top level DIE should be one of the above. | |
389 | gold_warning(_("%s: top level DIE is not DW_TAG_compile_unit " | |
390 | "or DW_TAG_type_unit"), | |
391 | this->object()->name().c_str()); | |
392 | return; | |
393 | } | |
394 | ||
395 | } | |
396 | ||
397 | // Visit the children of PARENT, looking for symbols to add to the index. | |
398 | // CONTEXT points to the DIE to use for constructing the qualified name -- | |
399 | // NULL if PARENT is the top-level DIE; otherwise it is the same as PARENT. | |
400 | ||
401 | void | |
402 | Gdb_index_info_reader::visit_children(Dwarf_die* parent, Dwarf_die* context) | |
403 | { | |
404 | off_t next_offset = 0; | |
405 | for (off_t die_offset = parent->child_offset(); | |
406 | die_offset != 0; | |
407 | die_offset = next_offset) | |
408 | { | |
409 | Dwarf_die die(this, die_offset, parent); | |
410 | if (die.tag() == 0) | |
411 | break; | |
412 | this->visit_die(&die, context); | |
413 | next_offset = die.sibling_offset(); | |
414 | } | |
415 | } | |
416 | ||
417 | // Visit a child DIE, looking for symbols to add to the index. | |
418 | // CONTEXT is the parent DIE, used for constructing the qualified name; | |
419 | // it is NULL if the parent DIE is the top-level DIE. | |
420 | ||
421 | void | |
422 | Gdb_index_info_reader::visit_die(Dwarf_die* die, Dwarf_die* context) | |
423 | { | |
424 | switch (die->tag()) | |
425 | { | |
426 | case elfcpp::DW_TAG_subprogram: | |
427 | case elfcpp::DW_TAG_constant: | |
428 | case elfcpp::DW_TAG_variable: | |
429 | case elfcpp::DW_TAG_enumerator: | |
430 | case elfcpp::DW_TAG_base_type: | |
431 | if (die->is_declaration()) | |
432 | this->add_declaration(die, context); | |
433 | else | |
434 | { | |
435 | // If the DIE is not a declaration, add it to the index. | |
436 | std::string full_name = this->get_qualified_name(die, context); | |
437 | if (!full_name.empty()) | |
438 | this->gdb_index_->add_symbol(this->cu_index_, full_name.c_str()); | |
439 | } | |
440 | break; | |
441 | case elfcpp::DW_TAG_typedef: | |
442 | case elfcpp::DW_TAG_union_type: | |
443 | case elfcpp::DW_TAG_class_type: | |
444 | case elfcpp::DW_TAG_interface_type: | |
445 | case elfcpp::DW_TAG_structure_type: | |
446 | case elfcpp::DW_TAG_enumeration_type: | |
447 | case elfcpp::DW_TAG_subrange_type: | |
448 | case elfcpp::DW_TAG_namespace: | |
449 | { | |
450 | std::string full_name; | |
451 | ||
452 | // For classes at the top level, we need to look for a | |
453 | // member function with a linkage name in order to get | |
454 | // the properly-canonicalized name. | |
455 | if (context == NULL | |
456 | && (die->tag() == elfcpp::DW_TAG_class_type | |
457 | || die->tag() == elfcpp::DW_TAG_structure_type | |
458 | || die->tag() == elfcpp::DW_TAG_union_type)) | |
459 | full_name.assign(this->guess_full_class_name(die)); | |
460 | ||
461 | // Because we will visit the children, we need to add this DIE | |
462 | // to the declarations table. | |
463 | if (full_name.empty()) | |
464 | this->add_declaration(die, context); | |
465 | else | |
466 | this->add_declaration_with_full_name(die, full_name.c_str()); | |
467 | ||
468 | // If the DIE is not a declaration, add it to the index. | |
469 | // Gdb stores a namespace in the index even when it is | |
470 | // a declaration. | |
471 | if (die->tag() == elfcpp::DW_TAG_namespace | |
472 | || !die->is_declaration()) | |
473 | { | |
474 | if (full_name.empty()) | |
475 | full_name = this->get_qualified_name(die, context); | |
476 | if (!full_name.empty()) | |
477 | this->gdb_index_->add_symbol(this->cu_index_, | |
478 | full_name.c_str()); | |
479 | } | |
480 | ||
481 | // We're interested in the children only for namespaces and | |
482 | // enumeration types. For enumeration types, we do not include | |
483 | // the enumeration tag as part of the full name. For other tags, | |
484 | // visit the children only to collect declarations. | |
485 | if (die->tag() == elfcpp::DW_TAG_namespace | |
486 | || die->tag() == elfcpp::DW_TAG_enumeration_type) | |
487 | this->visit_children(die, die); | |
488 | else | |
489 | this->visit_children_for_decls(die); | |
490 | } | |
491 | break; | |
492 | default: | |
493 | break; | |
494 | } | |
495 | } | |
496 | ||
497 | // Visit the children of PARENT, looking only for declarations that | |
498 | // may be referenced by later specification DIEs. | |
499 | ||
500 | void | |
501 | Gdb_index_info_reader::visit_children_for_decls(Dwarf_die* parent) | |
502 | { | |
503 | off_t next_offset = 0; | |
504 | for (off_t die_offset = parent->child_offset(); | |
505 | die_offset != 0; | |
506 | die_offset = next_offset) | |
507 | { | |
508 | Dwarf_die die(this, die_offset, parent); | |
509 | if (die.tag() == 0) | |
510 | break; | |
511 | this->visit_die_for_decls(&die, parent); | |
512 | next_offset = die.sibling_offset(); | |
513 | } | |
514 | } | |
515 | ||
516 | // Visit a child DIE, looking only for declarations that | |
517 | // may be referenced by later specification DIEs. | |
518 | ||
519 | void | |
520 | Gdb_index_info_reader::visit_die_for_decls(Dwarf_die* die, Dwarf_die* context) | |
521 | { | |
522 | switch (die->tag()) | |
523 | { | |
524 | case elfcpp::DW_TAG_subprogram: | |
525 | case elfcpp::DW_TAG_constant: | |
526 | case elfcpp::DW_TAG_variable: | |
527 | case elfcpp::DW_TAG_enumerator: | |
528 | case elfcpp::DW_TAG_base_type: | |
529 | { | |
530 | if (die->is_declaration()) | |
531 | this->add_declaration(die, context); | |
532 | } | |
533 | break; | |
534 | case elfcpp::DW_TAG_typedef: | |
535 | case elfcpp::DW_TAG_union_type: | |
536 | case elfcpp::DW_TAG_class_type: | |
537 | case elfcpp::DW_TAG_interface_type: | |
538 | case elfcpp::DW_TAG_structure_type: | |
539 | case elfcpp::DW_TAG_enumeration_type: | |
540 | case elfcpp::DW_TAG_subrange_type: | |
541 | case elfcpp::DW_TAG_namespace: | |
542 | { | |
543 | if (die->is_declaration()) | |
544 | this->add_declaration(die, context); | |
545 | this->visit_children_for_decls(die); | |
546 | } | |
547 | break; | |
548 | default: | |
549 | break; | |
550 | } | |
551 | } | |
552 | ||
553 | // Extract the class name from the linkage name of a member function. | |
554 | // This code is adapted from ../gdb/cp-support.c. | |
555 | ||
556 | #define d_left(dc) (dc)->u.s_binary.left | |
557 | #define d_right(dc) (dc)->u.s_binary.right | |
558 | ||
559 | static char* | |
560 | class_name_from_linkage_name(const char* linkage_name) | |
561 | { | |
562 | void* storage; | |
563 | struct demangle_component* tree = | |
564 | cplus_demangle_v3_components(linkage_name, DMGL_NO_OPTS, &storage); | |
565 | if (tree == NULL) | |
566 | return NULL; | |
567 | ||
568 | int done = 0; | |
569 | ||
570 | // First strip off any qualifiers, if we have a function or | |
571 | // method. | |
572 | while (!done) | |
573 | switch (tree->type) | |
574 | { | |
575 | case DEMANGLE_COMPONENT_CONST: | |
576 | case DEMANGLE_COMPONENT_RESTRICT: | |
577 | case DEMANGLE_COMPONENT_VOLATILE: | |
578 | case DEMANGLE_COMPONENT_CONST_THIS: | |
579 | case DEMANGLE_COMPONENT_RESTRICT_THIS: | |
580 | case DEMANGLE_COMPONENT_VOLATILE_THIS: | |
581 | case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL: | |
582 | tree = d_left(tree); | |
583 | break; | |
584 | default: | |
585 | done = 1; | |
586 | break; | |
587 | } | |
588 | ||
589 | // If what we have now is a function, discard the argument list. | |
590 | if (tree->type == DEMANGLE_COMPONENT_TYPED_NAME) | |
591 | tree = d_left(tree); | |
592 | ||
593 | // If what we have now is a template, strip off the template | |
594 | // arguments. The left subtree may be a qualified name. | |
595 | if (tree->type == DEMANGLE_COMPONENT_TEMPLATE) | |
596 | tree = d_left(tree); | |
597 | ||
598 | // What we have now should be a name, possibly qualified. | |
599 | // Additional qualifiers could live in the left subtree or the right | |
600 | // subtree. Find the last piece. | |
601 | done = 0; | |
602 | struct demangle_component* prev_comp = NULL; | |
603 | struct demangle_component* cur_comp = tree; | |
604 | while (!done) | |
605 | switch (cur_comp->type) | |
606 | { | |
607 | case DEMANGLE_COMPONENT_QUAL_NAME: | |
608 | case DEMANGLE_COMPONENT_LOCAL_NAME: | |
609 | prev_comp = cur_comp; | |
610 | cur_comp = d_right(cur_comp); | |
611 | break; | |
612 | case DEMANGLE_COMPONENT_TEMPLATE: | |
613 | case DEMANGLE_COMPONENT_NAME: | |
614 | case DEMANGLE_COMPONENT_CTOR: | |
615 | case DEMANGLE_COMPONENT_DTOR: | |
616 | case DEMANGLE_COMPONENT_OPERATOR: | |
617 | case DEMANGLE_COMPONENT_EXTENDED_OPERATOR: | |
618 | done = 1; | |
619 | break; | |
620 | default: | |
621 | done = 1; | |
622 | cur_comp = NULL; | |
623 | break; | |
624 | } | |
625 | ||
626 | char* ret = NULL; | |
627 | if (cur_comp != NULL && prev_comp != NULL) | |
628 | { | |
629 | // We want to discard the rightmost child of PREV_COMP. | |
630 | *prev_comp = *d_left(prev_comp); | |
631 | size_t allocated_size; | |
632 | ret = cplus_demangle_print(DMGL_NO_OPTS, tree, 30, &allocated_size); | |
633 | } | |
634 | ||
635 | free(storage); | |
636 | return ret; | |
637 | } | |
638 | ||
639 | // Guess a fully-qualified name for a class type, based on member function | |
640 | // linkage names. This is needed for class/struct/union types at the | |
641 | // top level, because GCC does not always properly embed them within | |
642 | // the namespace. As in gdb, we look for a member function with a linkage | |
643 | // name and extract the qualified name from the demangled name. | |
644 | ||
645 | std::string | |
646 | Gdb_index_info_reader::guess_full_class_name(Dwarf_die* die) | |
647 | { | |
648 | std::string full_name; | |
649 | off_t next_offset = 0; | |
650 | ||
651 | // This routine scans ahead in the DIE structure, possibly advancing | |
652 | // the relocation tracker beyond the current DIE. We need to checkpoint | |
653 | // the tracker and reset it when we're done. | |
654 | uint64_t checkpoint = this->get_reloc_checkpoint(); | |
655 | ||
656 | for (off_t child_offset = die->child_offset(); | |
657 | child_offset != 0; | |
658 | child_offset = next_offset) | |
659 | { | |
660 | Dwarf_die child(this, child_offset, die); | |
661 | if (child.tag() == 0) | |
662 | break; | |
663 | if (child.tag() == elfcpp::DW_TAG_subprogram) | |
664 | { | |
665 | const char* linkage_name = child.linkage_name(); | |
666 | if (linkage_name != NULL) | |
667 | { | |
668 | char* guess = class_name_from_linkage_name(linkage_name); | |
669 | if (guess != NULL) | |
670 | { | |
671 | full_name.assign(guess); | |
672 | free(guess); | |
673 | break; | |
674 | } | |
675 | } | |
676 | } | |
677 | next_offset = child.sibling_offset(); | |
678 | } | |
679 | ||
680 | this->reset_relocs(checkpoint); | |
681 | return full_name; | |
682 | } | |
683 | ||
684 | // Add a declaration DIE to the table of declarations. | |
685 | ||
686 | void | |
687 | Gdb_index_info_reader::add_declaration(Dwarf_die* die, Dwarf_die* context) | |
688 | { | |
689 | const char* name = die->name(); | |
690 | ||
691 | off_t parent_offset = context != NULL ? context->offset() : 0; | |
692 | ||
693 | // If this DIE has a DW_AT_specification or DW_AT_abstract_origin | |
694 | // attribute, use the parent and name from the earlier declaration. | |
695 | off_t spec = die->specification(); | |
696 | if (spec == 0) | |
697 | spec = die->abstract_origin(); | |
698 | if (spec > 0) | |
699 | { | |
700 | Declaration_map::iterator it = this->declarations_.find(spec); | |
701 | if (it != this->declarations_.end()) | |
702 | { | |
703 | parent_offset = it->second.parent_offset_; | |
704 | name = it->second.name_; | |
705 | } | |
706 | } | |
707 | ||
708 | if (name == NULL) | |
709 | { | |
710 | if (die->tag() == elfcpp::DW_TAG_namespace) | |
711 | name = "(anonymous namespace)"; | |
712 | else if (die->tag() == elfcpp::DW_TAG_union_type) | |
713 | name = "(anonymous union)"; | |
714 | else | |
715 | name = "(unknown)"; | |
716 | } | |
717 | ||
718 | Declaration_pair decl(parent_offset, name); | |
719 | this->declarations_.insert(std::make_pair(die->offset(), decl)); | |
720 | } | |
721 | ||
722 | // Add a declaration whose fully-qualified name is already known. | |
723 | // In the case where we had to get the canonical name by demangling | |
724 | // a linkage name, this ensures we use that name instead of the one | |
725 | // provided in DW_AT_name. | |
726 | ||
727 | void | |
728 | Gdb_index_info_reader::add_declaration_with_full_name( | |
729 | Dwarf_die* die, | |
730 | const char* full_name) | |
731 | { | |
732 | // We need to copy the name. | |
733 | int len = strlen(full_name); | |
734 | char* copy = new char[len + 1]; | |
735 | memcpy(copy, full_name, len + 1); | |
736 | ||
737 | // Flag that we now manage the memory this points to. | |
738 | Declaration_pair decl(-1, copy); | |
739 | this->declarations_.insert(std::make_pair(die->offset(), decl)); | |
740 | } | |
741 | ||
742 | // Return the context for a DIE whose parent is at DIE_OFFSET. | |
743 | ||
744 | std::string | |
745 | Gdb_index_info_reader::get_context(off_t die_offset) | |
746 | { | |
747 | std::string context; | |
748 | Declaration_map::iterator it = this->declarations_.find(die_offset); | |
749 | if (it != this->declarations_.end()) | |
750 | { | |
751 | off_t parent_offset = it->second.parent_offset_; | |
752 | if (parent_offset > 0) | |
753 | { | |
754 | context = get_context(parent_offset); | |
755 | context.append("::"); | |
756 | } | |
757 | if (it->second.name_ != NULL) | |
758 | context.append(it->second.name_); | |
759 | } | |
760 | return context; | |
761 | } | |
762 | ||
763 | // Construct the fully-qualified name for DIE. | |
764 | ||
765 | std::string | |
766 | Gdb_index_info_reader::get_qualified_name(Dwarf_die* die, Dwarf_die* context) | |
767 | { | |
768 | std::string full_name; | |
769 | const char* name = die->name(); | |
770 | ||
771 | off_t parent_offset = context != NULL ? context->offset() : 0; | |
772 | ||
773 | // If this DIE has a DW_AT_specification or DW_AT_abstract_origin | |
774 | // attribute, use the parent and name from the earlier declaration. | |
775 | off_t spec = die->specification(); | |
776 | if (spec == 0) | |
777 | spec = die->abstract_origin(); | |
778 | if (spec > 0) | |
779 | { | |
780 | Declaration_map::iterator it = this->declarations_.find(spec); | |
781 | if (it != this->declarations_.end()) | |
782 | { | |
783 | parent_offset = it->second.parent_offset_; | |
784 | name = it->second.name_; | |
785 | } | |
786 | } | |
787 | ||
788 | if (name == NULL && die->tag() == elfcpp::DW_TAG_namespace) | |
789 | name = "(anonymous namespace)"; | |
790 | else if (name == NULL) | |
791 | return full_name; | |
792 | ||
793 | // If this is an enumerator constant, skip the immediate parent, | |
794 | // which is the enumeration tag. | |
795 | if (die->tag() == elfcpp::DW_TAG_enumerator) | |
796 | { | |
797 | Declaration_map::iterator it = this->declarations_.find(parent_offset); | |
798 | if (it != this->declarations_.end()) | |
799 | parent_offset = it->second.parent_offset_; | |
800 | } | |
801 | ||
802 | if (parent_offset > 0) | |
803 | { | |
804 | full_name.assign(this->get_context(parent_offset)); | |
805 | full_name.append("::"); | |
806 | } | |
807 | full_name.append(name); | |
808 | ||
809 | return full_name; | |
810 | } | |
811 | ||
812 | // Record the address ranges for a compilation unit. | |
813 | ||
814 | void | |
815 | Gdb_index_info_reader::record_cu_ranges(Dwarf_die* die) | |
816 | { | |
817 | unsigned int shndx; | |
818 | unsigned int shndx2; | |
819 | ||
820 | off_t ranges_offset = die->ref_attribute(elfcpp::DW_AT_ranges, &shndx); | |
821 | if (ranges_offset != -1) | |
822 | { | |
823 | Dwarf_range_list* ranges = this->read_range_list(shndx, ranges_offset); | |
824 | if (ranges != NULL) | |
825 | this->gdb_index_->add_address_range_list(this->object(), | |
826 | this->cu_index_, ranges); | |
827 | return; | |
828 | } | |
829 | ||
57923f48 MW |
830 | off_t low_pc = die->address_attribute(elfcpp::DW_AT_low_pc, &shndx); |
831 | off_t high_pc = die->address_attribute(elfcpp::DW_AT_high_pc, &shndx2); | |
832 | if (high_pc == -1) | |
833 | { | |
834 | high_pc = die->uint_attribute(elfcpp::DW_AT_high_pc); | |
835 | high_pc += low_pc; | |
836 | shndx2 = shndx; | |
837 | } | |
838 | if ((low_pc != 0 || high_pc != 0) && low_pc != -1) | |
c1027032 CC |
839 | { |
840 | if (shndx != shndx2) | |
841 | { | |
842 | gold_warning(_("%s: DWARF info may be corrupt; low_pc and high_pc " | |
843 | "are in different sections"), | |
844 | this->object()->name().c_str()); | |
845 | return; | |
846 | } | |
847 | if (shndx == 0 || this->object()->is_section_included(shndx)) | |
848 | { | |
849 | Dwarf_range_list* ranges = new Dwarf_range_list(); | |
850 | ranges->add(shndx, low_pc, high_pc); | |
851 | this->gdb_index_->add_address_range_list(this->object(), | |
852 | this->cu_index_, ranges); | |
853 | } | |
854 | } | |
855 | } | |
856 | ||
234d4ab8 SA |
857 | // Read table and add the relevant names to the index. Returns true |
858 | // if any names were added. | |
c1027032 CC |
859 | |
860 | bool | |
234d4ab8 | 861 | Gdb_index_info_reader::read_pubtable(Dwarf_pubnames_table* table, off_t offset) |
c1027032 | 862 | { |
234d4ab8 SA |
863 | // If we couldn't read the section when building the cu_pubname_map, |
864 | // then we won't find any pubnames now. | |
865 | if (table == NULL) | |
866 | return false; | |
867 | ||
868 | if (!table->read_header(offset)) | |
869 | return false; | |
870 | while (true) | |
c1027032 | 871 | { |
234d4ab8 SA |
872 | const char* name = table->next_name(); |
873 | if (name == NULL) | |
874 | break; | |
875 | ||
876 | this->gdb_index_->add_symbol(this->cu_index_, name); | |
c1027032 | 877 | } |
234d4ab8 SA |
878 | return true; |
879 | } | |
880 | ||
881 | // Read the .debug_pubnames and .debug_pubtypes tables for the CU or TU. | |
882 | // Returns TRUE if either a pubnames or pubtypes section was found. | |
c1027032 | 883 | |
234d4ab8 SA |
884 | bool |
885 | Gdb_index_info_reader::read_pubnames_and_pubtypes(Dwarf_die* die) | |
886 | { | |
887 | // We use stmt_list_off as a unique identifier for the | |
888 | // compilation unit and its associated type units. | |
889 | unsigned int shndx; | |
890 | off_t stmt_list_off = die->ref_attribute (elfcpp::DW_AT_stmt_list, | |
891 | &shndx); | |
892 | // Look for the attr as either a flag or a ref. | |
893 | off_t offset = die->ref_attribute(elfcpp::DW_AT_GNU_pubnames, &shndx); | |
894 | ||
895 | // Newer versions of GCC generate CUs, but not TUs, with | |
896 | // DW_AT_FORM_flag_present. | |
897 | unsigned int flag = die->uint_attribute(elfcpp::DW_AT_GNU_pubnames); | |
898 | if (offset == -1 && flag == 0) | |
c1027032 | 899 | { |
234d4ab8 SA |
900 | // Didn't find the attribute. |
901 | if (die->tag() == elfcpp::DW_TAG_type_unit) | |
902 | { | |
903 | // If die is a TU, then it might correspond to a CU which we | |
904 | // have read. If it does, then no need to read the pubnames. | |
905 | // If it doesn't, then the caller will have to parse the | |
906 | // dies manually to find the names. | |
907 | return this->gdb_index_->pubnames_read(this->object(), | |
908 | stmt_list_off); | |
909 | } | |
c1027032 | 910 | else |
234d4ab8 SA |
911 | { |
912 | // No attribute on the CU means that no pubnames were read. | |
913 | return false; | |
914 | } | |
c1027032 CC |
915 | } |
916 | ||
234d4ab8 SA |
917 | // We found the attribute, so we can check if the corresponding |
918 | // pubnames have been read. | |
919 | if (this->gdb_index_->pubnames_read(this->object(), stmt_list_off)) | |
920 | return true; | |
921 | ||
922 | this->gdb_index_->set_pubnames_read(this->object(), stmt_list_off); | |
923 | ||
924 | // We have an attribute, and the pubnames haven't been read, so read | |
925 | // them. | |
926 | bool names = false; | |
927 | // In some of the cases, we could rely on the previous value of | |
928 | // offset here, but sorting out which cases complicates the logic | |
929 | // enough that it isn't worth it. So just look up the offset again. | |
930 | offset = this->gdb_index_->find_pubname_offset(this->cu_offset()); | |
931 | names = this->read_pubtable(this->gdb_index_->pubnames_table(), offset); | |
932 | ||
933 | bool types = false; | |
934 | offset = this->gdb_index_->find_pubtype_offset(this->cu_offset()); | |
935 | types = this->read_pubtable(this->gdb_index_->pubtypes_table(), offset); | |
936 | return names || types; | |
c1027032 CC |
937 | } |
938 | ||
939 | // Clear the declarations map. | |
940 | void | |
941 | Gdb_index_info_reader::clear_declarations() | |
942 | { | |
943 | // Free strings in memory we manage. | |
944 | for (Declaration_map::iterator it = this->declarations_.begin(); | |
945 | it != this->declarations_.end(); | |
946 | ++it) | |
947 | { | |
948 | if (it->second.parent_offset_ == -1) | |
949 | delete[] it->second.name_; | |
950 | } | |
951 | ||
952 | this->declarations_.clear(); | |
953 | } | |
954 | ||
955 | // Print usage statistics. | |
956 | void | |
957 | Gdb_index_info_reader::print_stats() | |
958 | { | |
959 | fprintf(stderr, _("%s: DWARF CUs: %u\n"), | |
960 | program_name, Gdb_index_info_reader::dwarf_cu_count); | |
961 | fprintf(stderr, _("%s: DWARF CUs without pubnames/pubtypes: %u\n"), | |
962 | program_name, Gdb_index_info_reader::dwarf_cu_nopubnames_count); | |
963 | fprintf(stderr, _("%s: DWARF TUs: %u\n"), | |
964 | program_name, Gdb_index_info_reader::dwarf_tu_count); | |
965 | fprintf(stderr, _("%s: DWARF TUs without pubnames/pubtypes: %u\n"), | |
966 | program_name, Gdb_index_info_reader::dwarf_tu_nopubnames_count); | |
967 | } | |
968 | ||
969 | // Class Gdb_index. | |
970 | ||
971 | // Construct the .gdb_index section. | |
972 | ||
973 | Gdb_index::Gdb_index(Output_section* gdb_index_section) | |
974 | : Output_section_data(4), | |
234d4ab8 SA |
975 | pubnames_table_(NULL), |
976 | pubtypes_table_(NULL), | |
c1027032 CC |
977 | gdb_index_section_(gdb_index_section), |
978 | comp_units_(), | |
979 | type_units_(), | |
980 | ranges_(), | |
981 | cu_vector_list_(), | |
982 | cu_vector_offsets_(NULL), | |
983 | stringpool_(), | |
984 | tu_offset_(0), | |
985 | addr_offset_(0), | |
986 | symtab_offset_(0), | |
987 | cu_pool_offset_(0), | |
988 | stringpool_offset_(0), | |
c891b3f9 | 989 | pubnames_object_(NULL), |
234d4ab8 | 990 | stmt_list_offset_(-1) |
c1027032 CC |
991 | { |
992 | this->gdb_symtab_ = new Gdb_hashtab<Gdb_symbol>(); | |
993 | } | |
994 | ||
995 | Gdb_index::~Gdb_index() | |
996 | { | |
997 | // Free the memory used by the symbol table. | |
998 | delete this->gdb_symtab_; | |
999 | // Free the memory used by the CU vectors. | |
1000 | for (unsigned int i = 0; i < this->cu_vector_list_.size(); ++i) | |
1001 | delete this->cu_vector_list_[i]; | |
1002 | } | |
1003 | ||
234d4ab8 SA |
1004 | |
1005 | // Scan the pubnames and pubtypes sections and build a map of the | |
1006 | // various cus and tus they refer to, so we can process the entries | |
1007 | // when we encounter the die for that cu or tu. | |
1008 | // Return the just-read table so it can be cached. | |
1009 | ||
1010 | Dwarf_pubnames_table* | |
1011 | Gdb_index::map_pubtable_to_dies(unsigned int attr, | |
1012 | Gdb_index_info_reader* dwinfo, | |
1013 | Relobj* object, | |
1014 | const unsigned char* symbols, | |
1015 | off_t symbols_size) | |
1016 | { | |
1017 | uint64_t section_offset = 0; | |
1018 | Dwarf_pubnames_table* table; | |
1019 | Pubname_offset_map* map; | |
1020 | ||
1021 | if (attr == elfcpp::DW_AT_GNU_pubnames) | |
1022 | { | |
1023 | table = new Dwarf_pubnames_table(dwinfo, false); | |
1024 | map = &this->cu_pubname_map_; | |
1025 | } | |
1026 | else | |
1027 | { | |
1028 | table = new Dwarf_pubnames_table(dwinfo, true); | |
1029 | map = &this->cu_pubtype_map_; | |
1030 | } | |
1031 | ||
1032 | map->clear(); | |
1033 | if (!table->read_section(object, symbols, symbols_size)) | |
1034 | return NULL; | |
1035 | ||
1036 | while (table->read_header(section_offset)) | |
1037 | { | |
1038 | map->insert(std::make_pair(table->cu_offset(), section_offset)); | |
1039 | section_offset += table->subsection_size(); | |
1040 | } | |
1041 | ||
1042 | return table; | |
1043 | } | |
1044 | ||
1045 | // Wrapper for map_pubtable_to_dies | |
1046 | ||
1047 | void | |
1048 | Gdb_index::map_pubnames_and_types_to_dies(Gdb_index_info_reader* dwinfo, | |
1049 | Relobj* object, | |
1050 | const unsigned char* symbols, | |
1051 | off_t symbols_size) | |
1052 | { | |
1053 | // This is a new object, so reset the relevant variables. | |
1054 | this->pubnames_object_ = object; | |
1055 | this->stmt_list_offset_ = -1; | |
1056 | ||
1057 | delete this->pubnames_table_; | |
1058 | this->pubnames_table_ | |
1059 | = this->map_pubtable_to_dies(elfcpp::DW_AT_GNU_pubnames, dwinfo, | |
1060 | object, symbols, symbols_size); | |
1061 | delete this->pubtypes_table_; | |
1062 | this->pubtypes_table_ | |
1063 | = this->map_pubtable_to_dies(elfcpp::DW_AT_GNU_pubtypes, dwinfo, | |
1064 | object, symbols, symbols_size); | |
1065 | } | |
1066 | ||
1067 | // Given a cu_offset, find the associated section of the pubnames | |
1068 | // table. | |
1069 | ||
1070 | off_t | |
1071 | Gdb_index::find_pubname_offset(off_t cu_offset) | |
1072 | { | |
1073 | Pubname_offset_map::iterator it = this->cu_pubname_map_.find(cu_offset); | |
1074 | if (it != this->cu_pubname_map_.end()) | |
1075 | return it->second; | |
1076 | return -1; | |
1077 | } | |
1078 | ||
1079 | // Given a cu_offset, find the associated section of the pubnames | |
1080 | // table. | |
1081 | ||
1082 | off_t | |
1083 | Gdb_index::find_pubtype_offset(off_t cu_offset) | |
1084 | { | |
1085 | Pubname_offset_map::iterator it = this->cu_pubtype_map_.find(cu_offset); | |
1086 | if (it != this->cu_pubtype_map_.end()) | |
1087 | return it->second; | |
1088 | return -1; | |
1089 | } | |
1090 | ||
c1027032 CC |
1091 | // Scan a .debug_info or .debug_types input section. |
1092 | ||
1093 | void | |
1094 | Gdb_index::scan_debug_info(bool is_type_unit, | |
1095 | Relobj* object, | |
1096 | const unsigned char* symbols, | |
1097 | off_t symbols_size, | |
1098 | unsigned int shndx, | |
1099 | unsigned int reloc_shndx, | |
1100 | unsigned int reloc_type) | |
1101 | { | |
1102 | Gdb_index_info_reader dwinfo(is_type_unit, object, | |
1103 | symbols, symbols_size, | |
1104 | shndx, reloc_shndx, | |
1105 | reloc_type, this); | |
234d4ab8 SA |
1106 | if (object != this->pubnames_object_) |
1107 | map_pubnames_and_types_to_dies(&dwinfo, object, symbols, symbols_size); | |
c1027032 CC |
1108 | dwinfo.parse(); |
1109 | } | |
1110 | ||
1111 | // Add a symbol. | |
1112 | ||
1113 | void | |
1114 | Gdb_index::add_symbol(int cu_index, const char* sym_name) | |
1115 | { | |
1116 | unsigned int hash = mapped_index_string_hash( | |
1117 | reinterpret_cast<const unsigned char*>(sym_name)); | |
1118 | Gdb_symbol* sym = new Gdb_symbol(); | |
1119 | this->stringpool_.add(sym_name, true, &sym->name_key); | |
1120 | sym->hashval = hash; | |
1121 | sym->cu_vector_index = 0; | |
1122 | ||
1123 | Gdb_symbol* found = this->gdb_symtab_->add(sym); | |
1124 | if (found == sym) | |
1125 | { | |
1126 | // New symbol -- allocate a new CU index vector. | |
1127 | found->cu_vector_index = this->cu_vector_list_.size(); | |
1128 | this->cu_vector_list_.push_back(new Cu_vector()); | |
1129 | } | |
1130 | else | |
1131 | { | |
1132 | // Found an existing symbol -- append to the existing | |
1133 | // CU index vector. | |
1134 | delete sym; | |
1135 | } | |
1136 | ||
1137 | // Add the CU index to the vector list for this symbol, | |
1138 | // if it's not already on the list. We only need to | |
1139 | // check the last added entry. | |
1140 | Cu_vector* cu_vec = this->cu_vector_list_[found->cu_vector_index]; | |
1141 | if (cu_vec->size() == 0 || cu_vec->back() != cu_index) | |
1142 | cu_vec->push_back(cu_index); | |
1143 | } | |
1144 | ||
234d4ab8 SA |
1145 | // Return TRUE if we have already processed the pubnames associated |
1146 | // with the statement list at the given OFFSET. | |
c1027032 CC |
1147 | |
1148 | bool | |
234d4ab8 | 1149 | Gdb_index::pubnames_read(const Relobj* object, off_t offset) |
c1027032 | 1150 | { |
c891b3f9 | 1151 | bool ret = (this->pubnames_object_ == object |
234d4ab8 | 1152 | && this->stmt_list_offset_ == offset); |
c1027032 CC |
1153 | return ret; |
1154 | } | |
1155 | ||
234d4ab8 SA |
1156 | // Record that we have processed the pubnames associated with the |
1157 | // statement list for OBJECT at the given OFFSET. | |
c1027032 | 1158 | |
234d4ab8 SA |
1159 | void |
1160 | Gdb_index::set_pubnames_read(const Relobj* object, off_t offset) | |
c1027032 | 1161 | { |
234d4ab8 SA |
1162 | this->pubnames_object_ = object; |
1163 | this->stmt_list_offset_ = offset; | |
c1027032 CC |
1164 | } |
1165 | ||
1166 | // Set the size of the .gdb_index section. | |
1167 | ||
1168 | void | |
1169 | Gdb_index::set_final_data_size() | |
1170 | { | |
1171 | // Finalize the string pool. | |
1172 | this->stringpool_.set_string_offsets(); | |
1173 | ||
1174 | // Compute the total size of the CU vectors. | |
1175 | // For each CU vector, include one entry for the count at the | |
1176 | // beginning of the vector. | |
1177 | unsigned int cu_vector_count = this->cu_vector_list_.size(); | |
1178 | unsigned int cu_vector_size = 0; | |
1179 | this->cu_vector_offsets_ = new off_t[cu_vector_count]; | |
1180 | for (unsigned int i = 0; i < cu_vector_count; ++i) | |
1181 | { | |
1182 | Cu_vector* cu_vec = this->cu_vector_list_[i]; | |
1183 | cu_vector_offsets_[i] = cu_vector_size; | |
1184 | cu_vector_size += gdb_index_offset_size * (cu_vec->size() + 1); | |
1185 | } | |
1186 | ||
1187 | // Assign relative offsets to each portion of the index, | |
1188 | // and find the total size of the section. | |
1189 | section_size_type data_size = gdb_index_hdr_size; | |
1190 | data_size += this->comp_units_.size() * gdb_index_cu_size; | |
1191 | this->tu_offset_ = data_size; | |
1192 | data_size += this->type_units_.size() * gdb_index_tu_size; | |
1193 | this->addr_offset_ = data_size; | |
1194 | for (unsigned int i = 0; i < this->ranges_.size(); ++i) | |
1195 | data_size += this->ranges_[i].ranges->size() * gdb_index_addr_size; | |
1196 | this->symtab_offset_ = data_size; | |
1197 | data_size += this->gdb_symtab_->capacity() * gdb_index_sym_size; | |
1198 | this->cu_pool_offset_ = data_size; | |
1199 | data_size += cu_vector_size; | |
1200 | this->stringpool_offset_ = data_size; | |
1201 | data_size += this->stringpool_.get_strtab_size(); | |
1202 | ||
1203 | this->set_data_size(data_size); | |
1204 | } | |
1205 | ||
1206 | // Write the data to the file. | |
1207 | ||
1208 | void | |
1209 | Gdb_index::do_write(Output_file* of) | |
1210 | { | |
1211 | const off_t off = this->offset(); | |
1212 | const off_t oview_size = this->data_size(); | |
1213 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1214 | unsigned char* pov = oview; | |
1215 | ||
1216 | // Write the file header. | |
1217 | // (1) Version number. | |
1218 | elfcpp::Swap<32, false>::writeval(pov, gdb_index_version); | |
1219 | pov += 4; | |
1220 | // (2) Offset of the CU list. | |
1221 | elfcpp::Swap<32, false>::writeval(pov, gdb_index_hdr_size); | |
1222 | pov += 4; | |
1223 | // (3) Offset of the types CU list. | |
1224 | elfcpp::Swap<32, false>::writeval(pov, this->tu_offset_); | |
1225 | pov += 4; | |
1226 | // (4) Offset of the address area. | |
1227 | elfcpp::Swap<32, false>::writeval(pov, this->addr_offset_); | |
1228 | pov += 4; | |
1229 | // (5) Offset of the symbol table. | |
1230 | elfcpp::Swap<32, false>::writeval(pov, this->symtab_offset_); | |
1231 | pov += 4; | |
1232 | // (6) Offset of the constant pool. | |
1233 | elfcpp::Swap<32, false>::writeval(pov, this->cu_pool_offset_); | |
1234 | pov += 4; | |
1235 | ||
1236 | gold_assert(pov - oview == gdb_index_hdr_size); | |
1237 | ||
1238 | // Write the CU list. | |
1239 | unsigned int comp_units_count = this->comp_units_.size(); | |
1240 | for (unsigned int i = 0; i < comp_units_count; ++i) | |
1241 | { | |
1242 | const Comp_unit& cu = this->comp_units_[i]; | |
1243 | elfcpp::Swap<64, false>::writeval(pov, cu.cu_offset); | |
1244 | elfcpp::Swap<64, false>::writeval(pov + 8, cu.cu_length); | |
1245 | pov += 16; | |
1246 | } | |
1247 | ||
1248 | gold_assert(pov - oview == this->tu_offset_); | |
1249 | ||
1250 | // Write the types CU list. | |
1251 | for (unsigned int i = 0; i < this->type_units_.size(); ++i) | |
1252 | { | |
1253 | const Type_unit& tu = this->type_units_[i]; | |
1254 | elfcpp::Swap<64, false>::writeval(pov, tu.tu_offset); | |
1255 | elfcpp::Swap<64, false>::writeval(pov + 8, tu.type_offset); | |
1256 | elfcpp::Swap<64, false>::writeval(pov + 16, tu.type_signature); | |
1257 | pov += 24; | |
1258 | } | |
1259 | ||
1260 | gold_assert(pov - oview == this->addr_offset_); | |
1261 | ||
1262 | // Write the address area. | |
1263 | for (unsigned int i = 0; i < this->ranges_.size(); ++i) | |
1264 | { | |
1265 | int cu_index = this->ranges_[i].cu_index; | |
1266 | // Translate negative indexes, which refer to a TU, to a | |
1267 | // logical index into a concatenated CU/TU list. | |
1268 | if (cu_index < 0) | |
1269 | cu_index = comp_units_count + (-1 - cu_index); | |
1270 | Relobj* object = this->ranges_[i].object; | |
1271 | const Dwarf_range_list& ranges = *this->ranges_[i].ranges; | |
1272 | for (unsigned int j = 0; j < ranges.size(); ++j) | |
1273 | { | |
1274 | const Dwarf_range_list::Range& range = ranges[j]; | |
1275 | uint64_t base = 0; | |
1276 | if (range.shndx > 0) | |
1277 | { | |
1278 | const Output_section* os = object->output_section(range.shndx); | |
1279 | base = (os->address() | |
1280 | + object->output_section_offset(range.shndx)); | |
1281 | } | |
1d509098 CC |
1282 | elfcpp::Swap_aligned32<64, false>::writeval(pov, base + range.start); |
1283 | elfcpp::Swap_aligned32<64, false>::writeval(pov + 8, | |
1284 | base + range.end); | |
c1027032 CC |
1285 | elfcpp::Swap<32, false>::writeval(pov + 16, cu_index); |
1286 | pov += 20; | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | gold_assert(pov - oview == this->symtab_offset_); | |
1291 | ||
1292 | // Write the symbol table. | |
1293 | for (unsigned int i = 0; i < this->gdb_symtab_->capacity(); ++i) | |
1294 | { | |
1295 | const Gdb_symbol* sym = (*this->gdb_symtab_)[i]; | |
1296 | section_offset_type name_offset = 0; | |
1297 | unsigned int cu_vector_offset = 0; | |
1298 | if (sym != NULL) | |
1299 | { | |
1300 | name_offset = (this->stringpool_.get_offset_from_key(sym->name_key) | |
1301 | + this->stringpool_offset_ - this->cu_pool_offset_); | |
1302 | cu_vector_offset = this->cu_vector_offsets_[sym->cu_vector_index]; | |
1303 | } | |
1304 | elfcpp::Swap<32, false>::writeval(pov, name_offset); | |
1305 | elfcpp::Swap<32, false>::writeval(pov + 4, cu_vector_offset); | |
1306 | pov += 8; | |
1307 | } | |
1308 | ||
1309 | gold_assert(pov - oview == this->cu_pool_offset_); | |
1310 | ||
1311 | // Write the CU vectors into the constant pool. | |
1312 | for (unsigned int i = 0; i < this->cu_vector_list_.size(); ++i) | |
1313 | { | |
1314 | Cu_vector* cu_vec = this->cu_vector_list_[i]; | |
1315 | elfcpp::Swap<32, false>::writeval(pov, cu_vec->size()); | |
1316 | pov += 4; | |
1317 | for (unsigned int j = 0; j < cu_vec->size(); ++j) | |
1318 | { | |
1319 | int cu_index = (*cu_vec)[j]; | |
1320 | if (cu_index < 0) | |
1321 | cu_index = comp_units_count + (-1 - cu_index); | |
1322 | elfcpp::Swap<32, false>::writeval(pov, cu_index); | |
1323 | pov += 4; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | gold_assert(pov - oview == this->stringpool_offset_); | |
1328 | ||
1329 | // Write the strings into the constant pool. | |
1330 | this->stringpool_.write_to_buffer(pov, oview_size - this->stringpool_offset_); | |
1331 | ||
1332 | of->write_output_view(off, oview_size, oview); | |
1333 | } | |
1334 | ||
1335 | // Print usage statistics. | |
1336 | void | |
1337 | Gdb_index::print_stats() | |
1338 | { | |
1339 | if (parameters->options().gdb_index()) | |
1340 | Gdb_index_info_reader::print_stats(); | |
1341 | } | |
1342 | ||
1343 | } // End namespace gold. |