1 //===-- DWARFDebugInfoEntry.cpp ---------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "DWARFDebugInfoEntry.h"
11
12 #include <assert.h>
13
14 #include <algorithm>
15
16 #include "lldb/Core/Module.h"
17 #include "lldb/Expression/DWARFExpression.h"
18 #include "lldb/Symbol/ObjectFile.h"
19 #include "lldb/Utility/Stream.h"
20
21 #include "DWARFUnit.h"
22 #include "DWARFDIECollection.h"
23 #include "DWARFDebugAbbrev.h"
24 #include "DWARFDebugAranges.h"
25 #include "DWARFDebugInfo.h"
26 #include "DWARFDebugRanges.h"
27 #include "DWARFDeclContext.h"
28 #include "DWARFFormValue.h"
29 #include "SymbolFileDWARF.h"
30 #include "SymbolFileDWARFDwo.h"
31
32 using namespace lldb_private;
33 using namespace std;
34 extern int g_verbose;
35
FastExtract(const DWARFDataExtractor & debug_info_data,const DWARFUnit * cu,const DWARFFormValue::FixedFormSizes & fixed_form_sizes,lldb::offset_t * offset_ptr)36 bool DWARFDebugInfoEntry::FastExtract(
37 const DWARFDataExtractor &debug_info_data, const DWARFUnit *cu,
38 const DWARFFormValue::FixedFormSizes &fixed_form_sizes,
39 lldb::offset_t *offset_ptr) {
40 m_offset = *offset_ptr;
41 m_parent_idx = 0;
42 m_sibling_idx = 0;
43 const uint64_t abbr_idx = debug_info_data.GetULEB128(offset_ptr);
44 lldbassert(abbr_idx <= UINT16_MAX);
45 m_abbr_idx = abbr_idx;
46
47 // assert (fixed_form_sizes); // For best performance this should be
48 // specified!
49
50 if (m_abbr_idx) {
51 lldb::offset_t offset = *offset_ptr;
52
53 const DWARFAbbreviationDeclaration *abbrevDecl =
54 cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx);
55
56 if (abbrevDecl == NULL) {
57 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError(
58 "{0x%8.8x}: invalid abbreviation code %u, please file a bug and "
59 "attach the file at the start of this error message",
60 m_offset, (unsigned)abbr_idx);
61 // WE can't parse anymore if the DWARF is borked...
62 *offset_ptr = UINT32_MAX;
63 return false;
64 }
65 m_tag = abbrevDecl->Tag();
66 m_has_children = abbrevDecl->HasChildren();
67 // Skip all data in the .debug_info for the attributes
68 const uint32_t numAttributes = abbrevDecl->NumAttributes();
69 uint32_t i;
70 dw_form_t form;
71 for (i = 0; i < numAttributes; ++i) {
72 form = abbrevDecl->GetFormByIndexUnchecked(i);
73
74 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form);
75 if (fixed_skip_size)
76 offset += fixed_skip_size;
77 else {
78 bool form_is_indirect = false;
79 do {
80 form_is_indirect = false;
81 uint32_t form_size = 0;
82 switch (form) {
83 // Blocks if inlined data that have a length field and the data bytes
84 // inlined in the .debug_info
85 case DW_FORM_exprloc:
86 case DW_FORM_block:
87 form_size = debug_info_data.GetULEB128(&offset);
88 break;
89 case DW_FORM_block1:
90 form_size = debug_info_data.GetU8_unchecked(&offset);
91 break;
92 case DW_FORM_block2:
93 form_size = debug_info_data.GetU16_unchecked(&offset);
94 break;
95 case DW_FORM_block4:
96 form_size = debug_info_data.GetU32_unchecked(&offset);
97 break;
98
99 // Inlined NULL terminated C-strings
100 case DW_FORM_string:
101 debug_info_data.GetCStr(&offset);
102 break;
103
104 // Compile unit address sized values
105 case DW_FORM_addr:
106 form_size = cu->GetAddressByteSize();
107 break;
108 case DW_FORM_ref_addr:
109 if (cu->GetVersion() <= 2)
110 form_size = cu->GetAddressByteSize();
111 else
112 form_size = cu->IsDWARF64() ? 8 : 4;
113 break;
114
115 // 0 sized form
116 case DW_FORM_flag_present:
117 form_size = 0;
118 break;
119
120 // 1 byte values
121 case DW_FORM_addrx1:
122 case DW_FORM_data1:
123 case DW_FORM_flag:
124 case DW_FORM_ref1:
125 case DW_FORM_strx1:
126 form_size = 1;
127 break;
128
129 // 2 byte values
130 case DW_FORM_addrx2:
131 case DW_FORM_data2:
132 case DW_FORM_ref2:
133 case DW_FORM_strx2:
134 form_size = 2;
135 break;
136
137 // 3 byte values
138 case DW_FORM_addrx3:
139 case DW_FORM_strx3:
140 form_size = 3;
141 break;
142
143 // 4 byte values
144 case DW_FORM_addrx4:
145 case DW_FORM_data4:
146 case DW_FORM_ref4:
147 case DW_FORM_strx4:
148 form_size = 4;
149 break;
150
151 // 8 byte values
152 case DW_FORM_data8:
153 case DW_FORM_ref8:
154 case DW_FORM_ref_sig8:
155 form_size = 8;
156 break;
157
158 // signed or unsigned LEB 128 values
159 case DW_FORM_addrx:
160 case DW_FORM_rnglistx:
161 case DW_FORM_sdata:
162 case DW_FORM_udata:
163 case DW_FORM_ref_udata:
164 case DW_FORM_GNU_addr_index:
165 case DW_FORM_GNU_str_index:
166 case DW_FORM_strx:
167 debug_info_data.Skip_LEB128(&offset);
168 break;
169
170 case DW_FORM_indirect:
171 form_is_indirect = true;
172 form = debug_info_data.GetULEB128(&offset);
173 break;
174
175 case DW_FORM_strp:
176 case DW_FORM_sec_offset:
177 if (cu->IsDWARF64())
178 debug_info_data.GetU64(&offset);
179 else
180 debug_info_data.GetU32(&offset);
181 break;
182
183 case DW_FORM_implicit_const:
184 form_size = 0;
185 break;
186
187 default:
188 *offset_ptr = m_offset;
189 return false;
190 }
191 offset += form_size;
192
193 } while (form_is_indirect);
194 }
195 }
196 *offset_ptr = offset;
197 return true;
198 } else {
199 m_tag = 0;
200 m_has_children = false;
201 return true; // NULL debug tag entry
202 }
203
204 return false;
205 }
206
207 //----------------------------------------------------------------------
208 // Extract
209 //
210 // Extract a debug info entry for a given compile unit from the .debug_info and
211 // .debug_abbrev data within the SymbolFileDWARF class starting at the given
212 // offset
213 //----------------------------------------------------------------------
Extract(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,lldb::offset_t * offset_ptr)214 bool DWARFDebugInfoEntry::Extract(SymbolFileDWARF *dwarf2Data,
215 const DWARFUnit *cu,
216 lldb::offset_t *offset_ptr) {
217 const DWARFDataExtractor &debug_info_data = cu->GetData();
218 // const DWARFDataExtractor& debug_str_data =
219 // dwarf2Data->get_debug_str_data();
220 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset();
221 lldb::offset_t offset = *offset_ptr;
222 // if (offset >= cu_end_offset)
223 // Log::Status("DIE at offset 0x%8.8x is beyond the end of the current
224 // compile unit (0x%8.8x)", m_offset, cu_end_offset);
225 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) {
226 m_offset = offset;
227
228 const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset);
229 lldbassert(abbr_idx <= UINT16_MAX);
230 m_abbr_idx = abbr_idx;
231 if (abbr_idx) {
232 const DWARFAbbreviationDeclaration *abbrevDecl =
233 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx);
234
235 if (abbrevDecl) {
236 m_tag = abbrevDecl->Tag();
237 m_has_children = abbrevDecl->HasChildren();
238
239 bool isCompileUnitTag = (m_tag == DW_TAG_compile_unit ||
240 m_tag == DW_TAG_partial_unit);
241 if (cu && isCompileUnitTag)
242 const_cast<DWARFUnit *>(cu)->SetBaseAddress(0);
243
244 // Skip all data in the .debug_info for the attributes
245 const uint32_t numAttributes = abbrevDecl->NumAttributes();
246 for (uint32_t i = 0; i < numAttributes; ++i) {
247 DWARFFormValue form_value(cu);
248 dw_attr_t attr;
249 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
250 dw_form_t form = form_value.Form();
251
252 if (isCompileUnitTag &&
253 ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) {
254 if (form_value.ExtractValue(debug_info_data, &offset)) {
255 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc)
256 const_cast<DWARFUnit *>(cu)->SetBaseAddress(
257 form_value.Address());
258 }
259 } else {
260 bool form_is_indirect = false;
261 do {
262 form_is_indirect = false;
263 uint32_t form_size = 0;
264 switch (form) {
265 // Blocks if inlined data that have a length field and the data
266 // bytes inlined in the .debug_info
267 case DW_FORM_exprloc:
268 case DW_FORM_block:
269 form_size = debug_info_data.GetULEB128(&offset);
270 break;
271 case DW_FORM_block1:
272 form_size = debug_info_data.GetU8(&offset);
273 break;
274 case DW_FORM_block2:
275 form_size = debug_info_data.GetU16(&offset);
276 break;
277 case DW_FORM_block4:
278 form_size = debug_info_data.GetU32(&offset);
279 break;
280
281 // Inlined NULL terminated C-strings
282 case DW_FORM_string:
283 debug_info_data.GetCStr(&offset);
284 break;
285
286 // Compile unit address sized values
287 case DW_FORM_addr:
288 form_size = cu->GetAddressByteSize();
289 break;
290 case DW_FORM_ref_addr:
291 if (cu->GetVersion() <= 2)
292 form_size = cu->GetAddressByteSize();
293 else
294 form_size = cu->IsDWARF64() ? 8 : 4;
295 break;
296
297 // 0 sized form
298 case DW_FORM_flag_present:
299 case DW_FORM_implicit_const:
300 form_size = 0;
301 break;
302
303 // 1 byte values
304 case DW_FORM_data1:
305 case DW_FORM_flag:
306 case DW_FORM_ref1:
307 form_size = 1;
308 break;
309
310 // 2 byte values
311 case DW_FORM_data2:
312 case DW_FORM_ref2:
313 form_size = 2;
314 break;
315
316 // 4 byte values
317 case DW_FORM_data4:
318 case DW_FORM_ref4:
319 form_size = 4;
320 break;
321
322 // 8 byte values
323 case DW_FORM_data8:
324 case DW_FORM_ref8:
325 case DW_FORM_ref_sig8:
326 form_size = 8;
327 break;
328
329 // signed or unsigned LEB 128 values
330 case DW_FORM_sdata:
331 case DW_FORM_udata:
332 case DW_FORM_ref_udata:
333 case DW_FORM_GNU_addr_index:
334 case DW_FORM_GNU_str_index:
335 debug_info_data.Skip_LEB128(&offset);
336 break;
337
338 case DW_FORM_indirect:
339 form = debug_info_data.GetULEB128(&offset);
340 form_is_indirect = true;
341 break;
342
343 case DW_FORM_strp:
344 case DW_FORM_sec_offset:
345 if (cu->IsDWARF64())
346 debug_info_data.GetU64(&offset);
347 else
348 debug_info_data.GetU32(&offset);
349 break;
350
351 default:
352 *offset_ptr = offset;
353 return false;
354 }
355
356 offset += form_size;
357 } while (form_is_indirect);
358 }
359 }
360 *offset_ptr = offset;
361 return true;
362 }
363 } else {
364 m_tag = 0;
365 m_has_children = false;
366 *offset_ptr = offset;
367 return true; // NULL debug tag entry
368 }
369 }
370
371 return false;
372 }
373
374 //----------------------------------------------------------------------
375 // DumpAncestry
376 //
377 // Dumps all of a debug information entries parents up until oldest and all of
378 // it's attributes to the specified stream.
379 //----------------------------------------------------------------------
DumpAncestry(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const DWARFDebugInfoEntry * oldest,Stream & s,uint32_t recurse_depth) const380 void DWARFDebugInfoEntry::DumpAncestry(SymbolFileDWARF *dwarf2Data,
381 const DWARFUnit *cu,
382 const DWARFDebugInfoEntry *oldest,
383 Stream &s,
384 uint32_t recurse_depth) const {
385 const DWARFDebugInfoEntry *parent = GetParent();
386 if (parent && parent != oldest)
387 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0);
388 Dump(dwarf2Data, cu, s, recurse_depth);
389 }
390
GetRangesOffset(const DWARFDebugRangesBase * debug_ranges,DWARFFormValue & form_value)391 static dw_offset_t GetRangesOffset(const DWARFDebugRangesBase *debug_ranges,
392 DWARFFormValue &form_value) {
393 if (form_value.Form() == DW_FORM_rnglistx)
394 return debug_ranges->GetOffset(form_value.Unsigned());
395 return form_value.Unsigned();
396 }
397
398 //----------------------------------------------------------------------
399 // GetDIENamesAndRanges
400 //
401 // Gets the valid address ranges for a given DIE by looking for a
402 // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges attributes.
403 //----------------------------------------------------------------------
GetDIENamesAndRanges(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const char * & name,const char * & mangled,DWARFRangeList & ranges,int & decl_file,int & decl_line,int & decl_column,int & call_file,int & call_line,int & call_column,DWARFExpression * frame_base) const404 bool DWARFDebugInfoEntry::GetDIENamesAndRanges(
405 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, const char *&name,
406 const char *&mangled, DWARFRangeList &ranges, int &decl_file,
407 int &decl_line, int &decl_column, int &call_file, int &call_line,
408 int &call_column, DWARFExpression *frame_base) const {
409 if (dwarf2Data == nullptr)
410 return false;
411
412 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile();
413 if (dwo_symbol_file)
414 return GetDIENamesAndRanges(
415 dwo_symbol_file, dwo_symbol_file->GetCompileUnit(), name, mangled,
416 ranges, decl_file, decl_line, decl_column, call_file, call_line,
417 call_column, frame_base);
418
419 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
420 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
421 std::vector<DIERef> die_refs;
422 bool set_frame_base_loclist_addr = false;
423
424 lldb::offset_t offset;
425 const DWARFAbbreviationDeclaration *abbrevDecl =
426 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
427
428 lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule();
429
430 if (abbrevDecl) {
431 const DWARFDataExtractor &debug_info_data = cu->GetData();
432
433 if (!debug_info_data.ValidOffset(offset))
434 return false;
435
436 const uint32_t numAttributes = abbrevDecl->NumAttributes();
437 bool do_offset = false;
438
439 for (uint32_t i = 0; i < numAttributes; ++i) {
440 DWARFFormValue form_value(cu);
441 dw_attr_t attr;
442 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
443
444 if (form_value.ExtractValue(debug_info_data, &offset)) {
445 switch (attr) {
446 case DW_AT_low_pc:
447 lo_pc = form_value.Address();
448
449 if (do_offset)
450 hi_pc += lo_pc;
451 do_offset = false;
452 break;
453
454 case DW_AT_entry_pc:
455 lo_pc = form_value.Address();
456 break;
457
458 case DW_AT_high_pc:
459 if (form_value.Form() == DW_FORM_addr ||
460 form_value.Form() == DW_FORM_GNU_addr_index) {
461 hi_pc = form_value.Address();
462 } else {
463 hi_pc = form_value.Unsigned();
464 if (lo_pc == LLDB_INVALID_ADDRESS)
465 do_offset = hi_pc != LLDB_INVALID_ADDRESS;
466 else
467 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save
468 // on relocations
469 }
470 break;
471
472 case DW_AT_ranges: {
473 const DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges();
474 if (debug_ranges)
475 debug_ranges->FindRanges(cu, GetRangesOffset(debug_ranges, form_value), ranges);
476 else
477 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError(
478 "{0x%8.8x}: DIE has DW_AT_ranges(0x%" PRIx64
479 ") attribute yet DWARF has no .debug_ranges, please file a bug "
480 "and attach the file at the start of this error message",
481 m_offset, form_value.Unsigned());
482 } break;
483
484 case DW_AT_name:
485 if (name == NULL)
486 name = form_value.AsCString();
487 break;
488
489 case DW_AT_MIPS_linkage_name:
490 case DW_AT_linkage_name:
491 if (mangled == NULL)
492 mangled = form_value.AsCString();
493 break;
494
495 case DW_AT_abstract_origin:
496 die_refs.emplace_back(form_value);
497 break;
498
499 case DW_AT_specification:
500 die_refs.emplace_back(form_value);
501 break;
502
503 case DW_AT_decl_file:
504 if (decl_file == 0)
505 decl_file = form_value.Unsigned();
506 break;
507
508 case DW_AT_decl_line:
509 if (decl_line == 0)
510 decl_line = form_value.Unsigned();
511 break;
512
513 case DW_AT_decl_column:
514 if (decl_column == 0)
515 decl_column = form_value.Unsigned();
516 break;
517
518 case DW_AT_call_file:
519 if (call_file == 0)
520 call_file = form_value.Unsigned();
521 break;
522
523 case DW_AT_call_line:
524 if (call_line == 0)
525 call_line = form_value.Unsigned();
526 break;
527
528 case DW_AT_call_column:
529 if (call_column == 0)
530 call_column = form_value.Unsigned();
531 break;
532
533 case DW_AT_frame_base:
534 if (frame_base) {
535 if (form_value.BlockData()) {
536 uint32_t block_offset =
537 form_value.BlockData() - debug_info_data.GetDataStart();
538 uint32_t block_length = form_value.Unsigned();
539 frame_base->SetOpcodeData(module, debug_info_data, block_offset,
540 block_length);
541 } else {
542 const DWARFDataExtractor &debug_loc_data =
543 dwarf2Data->DebugLocData();
544 const dw_offset_t debug_loc_offset = form_value.Unsigned();
545
546 size_t loc_list_length = DWARFExpression::LocationListSize(
547 cu, debug_loc_data, debug_loc_offset);
548 if (loc_list_length > 0) {
549 frame_base->SetOpcodeData(module, debug_loc_data,
550 debug_loc_offset, loc_list_length);
551 if (lo_pc != LLDB_INVALID_ADDRESS) {
552 assert(lo_pc >= cu->GetBaseAddress());
553 frame_base->SetLocationListSlide(lo_pc -
554 cu->GetBaseAddress());
555 } else {
556 set_frame_base_loclist_addr = true;
557 }
558 }
559 }
560 }
561 break;
562
563 default:
564 break;
565 }
566 }
567 }
568 }
569
570 if (ranges.IsEmpty()) {
571 if (lo_pc != LLDB_INVALID_ADDRESS) {
572 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc)
573 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc));
574 else
575 ranges.Append(DWARFRangeList::Entry(lo_pc, 0));
576 }
577 }
578
579 if (set_frame_base_loclist_addr) {
580 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0);
581 assert(lowest_range_pc >= cu->GetBaseAddress());
582 frame_base->SetLocationListSlide(lowest_range_pc - cu->GetBaseAddress());
583 }
584
585 if (ranges.IsEmpty() || name == NULL || mangled == NULL) {
586 for (const DIERef &die_ref : die_refs) {
587 if (die_ref.die_offset != DW_INVALID_OFFSET) {
588 DWARFDIE die = dwarf2Data->GetDIE(die_ref);
589 if (die)
590 die.GetDIE()->GetDIENamesAndRanges(
591 die.GetDWARF(), die.GetCU(), name, mangled, ranges, decl_file,
592 decl_line, decl_column, call_file, call_line, call_column);
593 }
594 }
595 }
596 return !ranges.IsEmpty();
597 }
598
599 //----------------------------------------------------------------------
600 // Dump
601 //
602 // Dumps a debug information entry and all of it's attributes to the specified
603 // stream.
604 //----------------------------------------------------------------------
Dump(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,Stream & s,uint32_t recurse_depth) const605 void DWARFDebugInfoEntry::Dump(SymbolFileDWARF *dwarf2Data,
606 const DWARFUnit *cu, Stream &s,
607 uint32_t recurse_depth) const {
608 const DWARFDataExtractor &debug_info_data = cu->GetData();
609 lldb::offset_t offset = m_offset;
610
611 if (debug_info_data.ValidOffset(offset)) {
612 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset);
613
614 s.Printf("\n0x%8.8x: ", m_offset);
615 s.Indent();
616 if (abbrCode != m_abbr_idx) {
617 s.Printf("error: DWARF has been modified\n");
618 } else if (abbrCode) {
619 const DWARFAbbreviationDeclaration *abbrevDecl =
620 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode);
621
622 if (abbrevDecl) {
623 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag()));
624 s.Printf(" [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*' : ' ');
625
626 // Dump all data in the .debug_info for the attributes
627 const uint32_t numAttributes = abbrevDecl->NumAttributes();
628 for (uint32_t i = 0; i < numAttributes; ++i) {
629 DWARFFormValue form_value(cu);
630 dw_attr_t attr;
631 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
632
633 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr,
634 form_value);
635 }
636
637 const DWARFDebugInfoEntry *child = GetFirstChild();
638 if (recurse_depth > 0 && child) {
639 s.IndentMore();
640
641 while (child) {
642 child->Dump(dwarf2Data, cu, s, recurse_depth - 1);
643 child = child->GetSibling();
644 }
645 s.IndentLess();
646 }
647 } else
648 s.Printf("Abbreviation code note found in 'debug_abbrev' class for "
649 "code: %u\n",
650 abbrCode);
651 } else {
652 s.Printf("NULL\n");
653 }
654 }
655 }
656
DumpLocation(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,Stream & s) const657 void DWARFDebugInfoEntry::DumpLocation(SymbolFileDWARF *dwarf2Data,
658 DWARFUnit *cu, Stream &s) const {
659 const DWARFBaseDIE cu_die = cu->GetUnitDIEOnly();
660 const char *cu_name = NULL;
661 if (cu_die)
662 cu_name = cu_die.GetName();
663 const char *obj_file_name = NULL;
664 ObjectFile *obj_file = dwarf2Data->GetObjectFile();
665 if (obj_file)
666 obj_file_name =
667 obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>");
668 const char *die_name = GetName(dwarf2Data, cu);
669 s.Printf("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", cu->GetOffset(),
670 GetOffset(), die_name ? die_name : "", cu_name ? cu_name : "<NULL>",
671 obj_file_name ? obj_file_name : "<NULL>");
672 }
673
674 //----------------------------------------------------------------------
675 // DumpAttribute
676 //
677 // Dumps a debug information entry attribute along with it's form. Any special
678 // display of attributes is done (disassemble location lists, show enumeration
679 // values for attributes, etc).
680 //----------------------------------------------------------------------
DumpAttribute(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const DWARFDataExtractor & debug_info_data,lldb::offset_t * offset_ptr,Stream & s,dw_attr_t attr,DWARFFormValue & form_value)681 void DWARFDebugInfoEntry::DumpAttribute(
682 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
683 const DWARFDataExtractor &debug_info_data, lldb::offset_t *offset_ptr,
684 Stream &s, dw_attr_t attr, DWARFFormValue &form_value) {
685 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm);
686
687 s.Printf(" ");
688 s.Indent(DW_AT_value_to_name(attr));
689
690 if (show_form) {
691 s.Printf("[%s", DW_FORM_value_to_name(form_value.Form()));
692 }
693
694 if (!form_value.ExtractValue(debug_info_data, offset_ptr))
695 return;
696
697 if (show_form) {
698 if (form_value.Form() == DW_FORM_indirect) {
699 s.Printf(" [%s]", DW_FORM_value_to_name(form_value.Form()));
700 }
701
702 s.PutCString("] ");
703 }
704
705 s.PutCString("( ");
706
707 // Check to see if we have any special attribute formatters
708 switch (attr) {
709 case DW_AT_stmt_list:
710 s.Printf("0x%8.8" PRIx64, form_value.Unsigned());
711 break;
712
713 case DW_AT_language:
714 s.PutCString(DW_LANG_value_to_name(form_value.Unsigned()));
715 break;
716
717 case DW_AT_encoding:
718 s.PutCString(DW_ATE_value_to_name(form_value.Unsigned()));
719 break;
720
721 case DW_AT_frame_base:
722 case DW_AT_location:
723 case DW_AT_data_member_location: {
724 const uint8_t *blockData = form_value.BlockData();
725 if (blockData) {
726 // Location description is inlined in data in the form value
727 DWARFDataExtractor locationData(debug_info_data,
728 (*offset_ptr) - form_value.Unsigned(),
729 form_value.Unsigned());
730 DWARFExpression::PrintDWARFExpression(
731 s, locationData, DWARFUnit::GetAddressByteSize(cu), 4, false);
732 } else {
733 // We have a location list offset as the value that is the offset into
734 // the .debug_loc section that describes the value over it's lifetime
735 uint64_t debug_loc_offset = form_value.Unsigned();
736 if (dwarf2Data) {
737 DWARFExpression::PrintDWARFLocationList(
738 s, cu, dwarf2Data->DebugLocData(), debug_loc_offset);
739 }
740 }
741 } break;
742
743 case DW_AT_abstract_origin:
744 case DW_AT_specification: {
745 uint64_t abstract_die_offset = form_value.Reference();
746 form_value.Dump(s);
747 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( ";
748 GetName(dwarf2Data, cu, abstract_die_offset, s);
749 } break;
750
751 case DW_AT_type: {
752 uint64_t type_die_offset = form_value.Reference();
753 s.PutCString(" ( ");
754 AppendTypeName(dwarf2Data, cu, type_die_offset, s);
755 s.PutCString(" )");
756 } break;
757
758 case DW_AT_ranges: {
759 if (!dwarf2Data)
760 break;
761 lldb::offset_t ranges_offset =
762 GetRangesOffset(dwarf2Data->DebugRanges(), form_value);
763 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0;
764 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(),
765 &ranges_offset, base_addr);
766 } break;
767
768 default:
769 break;
770 }
771
772 s.PutCString(" )\n");
773 }
774
775 //----------------------------------------------------------------------
776 // Get all attribute values for a given DIE, including following any
777 // specification or abstract origin attributes and including those in the
778 // results. Any duplicate attributes will have the first instance take
779 // precedence (this can happen for declaration attributes).
780 //----------------------------------------------------------------------
GetAttributes(const DWARFUnit * cu,DWARFFormValue::FixedFormSizes fixed_form_sizes,DWARFAttributes & attributes,uint32_t curr_depth) const781 size_t DWARFDebugInfoEntry::GetAttributes(
782 const DWARFUnit *cu, DWARFFormValue::FixedFormSizes fixed_form_sizes,
783 DWARFAttributes &attributes, uint32_t curr_depth) const {
784 SymbolFileDWARF *dwarf2Data = nullptr;
785 const DWARFAbbreviationDeclaration *abbrevDecl = nullptr;
786 lldb::offset_t offset = 0;
787 if (cu) {
788 if (m_tag != DW_TAG_compile_unit && m_tag != DW_TAG_partial_unit) {
789 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile();
790 if (dwo_symbol_file)
791 return GetAttributes(dwo_symbol_file->GetCompileUnit(),
792 fixed_form_sizes, attributes, curr_depth);
793 }
794
795 dwarf2Data = cu->GetSymbolFileDWARF();
796 abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
797 }
798
799 if (abbrevDecl) {
800 const DWARFDataExtractor &debug_info_data = cu->GetData();
801
802 if (fixed_form_sizes.Empty())
803 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(
804 cu->GetAddressByteSize(), cu->IsDWARF64());
805
806 const uint32_t num_attributes = abbrevDecl->NumAttributes();
807 for (uint32_t i = 0; i < num_attributes; ++i) {
808 DWARFFormValue form_value(cu);
809 dw_attr_t attr;
810 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
811 const dw_form_t form = form_value.Form();
812
813 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin
814 // attributes, the depth will be non-zero. We need to omit certain
815 // attributes that don't make sense.
816 switch (attr) {
817 case DW_AT_sibling:
818 case DW_AT_declaration:
819 if (curr_depth > 0) {
820 // This attribute doesn't make sense when combined with the DIE that
821 // references this DIE. We know a DIE is referencing this DIE because
822 // curr_depth is not zero
823 break;
824 }
825 LLVM_FALLTHROUGH;
826 default:
827 attributes.Append(cu, offset, attr, form);
828 break;
829 }
830
831 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) {
832 if (form_value.ExtractValue(debug_info_data, &offset)) {
833 dw_offset_t die_offset = form_value.Reference();
834 DWARFDIE spec_die =
835 const_cast<DWARFUnit *>(cu)->GetDIE(die_offset);
836 if (spec_die)
837 spec_die.GetAttributes(attributes, curr_depth + 1);
838 }
839 } else {
840 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form);
841 if (fixed_skip_size)
842 offset += fixed_skip_size;
843 else
844 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu);
845 }
846 }
847 } else {
848 attributes.Clear();
849 }
850 return attributes.Size();
851 }
852
853 //----------------------------------------------------------------------
854 // GetAttributeValue
855 //
856 // Get the value of an attribute and return the .debug_info offset of the
857 // attribute if it was properly extracted into form_value, or zero if we fail
858 // since an offset of zero is invalid for an attribute (it would be a compile
859 // unit header).
860 //----------------------------------------------------------------------
GetAttributeValue(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,DWARFFormValue & form_value,dw_offset_t * end_attr_offset_ptr,bool check_specification_or_abstract_origin) const861 dw_offset_t DWARFDebugInfoEntry::GetAttributeValue(
862 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
863 const dw_attr_t attr, DWARFFormValue &form_value,
864 dw_offset_t *end_attr_offset_ptr,
865 bool check_specification_or_abstract_origin) const {
866 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile();
867 if (dwo_symbol_file && m_tag != DW_TAG_compile_unit &&
868 m_tag != DW_TAG_partial_unit)
869 return GetAttributeValue(dwo_symbol_file, dwo_symbol_file->GetCompileUnit(),
870 attr, form_value, end_attr_offset_ptr,
871 check_specification_or_abstract_origin);
872
873 lldb::offset_t offset;
874 const DWARFAbbreviationDeclaration *abbrevDecl =
875 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
876
877 if (abbrevDecl) {
878 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr);
879
880 if (attr_idx != DW_INVALID_INDEX) {
881 const DWARFDataExtractor &debug_info_data = cu->GetData();
882
883 uint32_t idx = 0;
884 while (idx < attr_idx)
885 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++),
886 debug_info_data, &offset, cu);
887
888 const dw_offset_t attr_offset = offset;
889 form_value.SetCompileUnit(cu);
890 form_value.SetForm(abbrevDecl->GetFormByIndex(idx));
891 if (form_value.ExtractValue(debug_info_data, &offset)) {
892 if (end_attr_offset_ptr)
893 *end_attr_offset_ptr = offset;
894 return attr_offset;
895 }
896 }
897 }
898
899 if (check_specification_or_abstract_origin) {
900 if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) {
901 DWARFDIE die =
902 const_cast<DWARFUnit *>(cu)->GetDIE(form_value.Reference());
903 if (die) {
904 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue(
905 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr,
906 false);
907 if (die_offset)
908 return die_offset;
909 }
910 }
911
912 if (GetAttributeValue(dwarf2Data, cu, DW_AT_abstract_origin, form_value)) {
913 DWARFDIE die =
914 const_cast<DWARFUnit *>(cu)->GetDIE(form_value.Reference());
915 if (die) {
916 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue(
917 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr,
918 false);
919 if (die_offset)
920 return die_offset;
921 }
922 }
923 }
924
925 if (!dwo_symbol_file)
926 return 0;
927
928 DWARFUnit *dwo_cu = dwo_symbol_file->GetCompileUnit();
929 if (!dwo_cu)
930 return 0;
931
932 DWARFBaseDIE dwo_cu_die = dwo_cu->GetUnitDIEOnly();
933 if (!dwo_cu_die.IsValid())
934 return 0;
935
936 return dwo_cu_die.GetDIE()->GetAttributeValue(
937 dwo_symbol_file, dwo_cu, attr, form_value, end_attr_offset_ptr,
938 check_specification_or_abstract_origin);
939 }
940
941 //----------------------------------------------------------------------
942 // GetAttributeValueAsString
943 //
944 // Get the value of an attribute as a string return it. The resulting pointer
945 // to the string data exists within the supplied SymbolFileDWARF and will only
946 // be available as long as the SymbolFileDWARF is still around and it's content
947 // doesn't change.
948 //----------------------------------------------------------------------
GetAttributeValueAsString(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,const char * fail_value,bool check_specification_or_abstract_origin) const949 const char *DWARFDebugInfoEntry::GetAttributeValueAsString(
950 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
951 const dw_attr_t attr, const char *fail_value,
952 bool check_specification_or_abstract_origin) const {
953 DWARFFormValue form_value;
954 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr,
955 check_specification_or_abstract_origin))
956 return form_value.AsCString();
957 return fail_value;
958 }
959
960 //----------------------------------------------------------------------
961 // GetAttributeValueAsUnsigned
962 //
963 // Get the value of an attribute as unsigned and return it.
964 //----------------------------------------------------------------------
GetAttributeValueAsUnsigned(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,uint64_t fail_value,bool check_specification_or_abstract_origin) const965 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsUnsigned(
966 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
967 const dw_attr_t attr, uint64_t fail_value,
968 bool check_specification_or_abstract_origin) const {
969 DWARFFormValue form_value;
970 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr,
971 check_specification_or_abstract_origin))
972 return form_value.Unsigned();
973 return fail_value;
974 }
975
976 //----------------------------------------------------------------------
977 // GetAttributeValueAsSigned
978 //
979 // Get the value of an attribute a signed value and return it.
980 //----------------------------------------------------------------------
GetAttributeValueAsSigned(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,int64_t fail_value,bool check_specification_or_abstract_origin) const981 int64_t DWARFDebugInfoEntry::GetAttributeValueAsSigned(
982 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
983 const dw_attr_t attr, int64_t fail_value,
984 bool check_specification_or_abstract_origin) const {
985 DWARFFormValue form_value;
986 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr,
987 check_specification_or_abstract_origin))
988 return form_value.Signed();
989 return fail_value;
990 }
991
992 //----------------------------------------------------------------------
993 // GetAttributeValueAsReference
994 //
995 // Get the value of an attribute as reference and fix up and compile unit
996 // relative offsets as needed.
997 //----------------------------------------------------------------------
GetAttributeValueAsReference(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,uint64_t fail_value,bool check_specification_or_abstract_origin) const998 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsReference(
999 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1000 const dw_attr_t attr, uint64_t fail_value,
1001 bool check_specification_or_abstract_origin) const {
1002 DWARFFormValue form_value;
1003 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr,
1004 check_specification_or_abstract_origin))
1005 return form_value.Reference();
1006 return fail_value;
1007 }
1008
GetAttributeValueAsAddress(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_attr_t attr,uint64_t fail_value,bool check_specification_or_abstract_origin) const1009 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsAddress(
1010 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1011 const dw_attr_t attr, uint64_t fail_value,
1012 bool check_specification_or_abstract_origin) const {
1013 DWARFFormValue form_value;
1014 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr,
1015 check_specification_or_abstract_origin))
1016 return form_value.Address();
1017 return fail_value;
1018 }
1019
1020 //----------------------------------------------------------------------
1021 // GetAttributeHighPC
1022 //
1023 // Get the hi_pc, adding hi_pc to lo_pc when specified as an <offset-from-low-
1024 // pc>.
1025 //
1026 // Returns the hi_pc or fail_value.
1027 //----------------------------------------------------------------------
GetAttributeHighPC(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,dw_addr_t lo_pc,uint64_t fail_value,bool check_specification_or_abstract_origin) const1028 dw_addr_t DWARFDebugInfoEntry::GetAttributeHighPC(
1029 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, dw_addr_t lo_pc,
1030 uint64_t fail_value, bool check_specification_or_abstract_origin) const {
1031 DWARFFormValue form_value;
1032 if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value, nullptr,
1033 check_specification_or_abstract_origin)) {
1034 dw_form_t form = form_value.Form();
1035 if (form == DW_FORM_addr || form == DW_FORM_GNU_addr_index)
1036 return form_value.Address();
1037
1038 // DWARF4 can specify the hi_pc as an <offset-from-lowpc>
1039 return lo_pc + form_value.Unsigned();
1040 }
1041 return fail_value;
1042 }
1043
1044 //----------------------------------------------------------------------
1045 // GetAttributeAddressRange
1046 //
1047 // Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified as an <offset-
1048 // from-low-pc>.
1049 //
1050 // Returns true or sets lo_pc and hi_pc to fail_value.
1051 //----------------------------------------------------------------------
GetAttributeAddressRange(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,dw_addr_t & lo_pc,dw_addr_t & hi_pc,uint64_t fail_value,bool check_specification_or_abstract_origin) const1052 bool DWARFDebugInfoEntry::GetAttributeAddressRange(
1053 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, dw_addr_t &lo_pc,
1054 dw_addr_t &hi_pc, uint64_t fail_value,
1055 bool check_specification_or_abstract_origin) const {
1056 lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc, fail_value,
1057 check_specification_or_abstract_origin);
1058 if (lo_pc != fail_value) {
1059 hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value,
1060 check_specification_or_abstract_origin);
1061 if (hi_pc != fail_value)
1062 return true;
1063 }
1064 lo_pc = fail_value;
1065 hi_pc = fail_value;
1066 return false;
1067 }
1068
GetAttributeAddressRanges(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,DWARFRangeList & ranges,bool check_hi_lo_pc,bool check_specification_or_abstract_origin) const1069 size_t DWARFDebugInfoEntry::GetAttributeAddressRanges(
1070 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1071 DWARFRangeList &ranges, bool check_hi_lo_pc,
1072 bool check_specification_or_abstract_origin) const {
1073 ranges.Clear();
1074
1075 DWARFFormValue form_value;
1076 if (GetAttributeValue(dwarf2Data, cu, DW_AT_ranges, form_value)) {
1077 if (DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges())
1078 debug_ranges->FindRanges(cu, GetRangesOffset(debug_ranges, form_value),
1079 ranges);
1080 } else if (check_hi_lo_pc) {
1081 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
1082 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
1083 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc,
1084 LLDB_INVALID_ADDRESS,
1085 check_specification_or_abstract_origin)) {
1086 if (lo_pc < hi_pc)
1087 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc));
1088 }
1089 }
1090 return ranges.GetSize();
1091 }
1092
1093 //----------------------------------------------------------------------
1094 // GetName
1095 //
1096 // Get value of the DW_AT_name attribute and return it if one exists, else
1097 // return NULL.
1098 //----------------------------------------------------------------------
GetName(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu) const1099 const char *DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data,
1100 const DWARFUnit *cu) const {
1101 return GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true);
1102 }
1103
1104 //----------------------------------------------------------------------
1105 // GetMangledName
1106 //
1107 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if one
1108 // exists, else return the value of the DW_AT_name attribute
1109 //----------------------------------------------------------------------
1110 const char *
GetMangledName(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,bool substitute_name_allowed) const1111 DWARFDebugInfoEntry::GetMangledName(SymbolFileDWARF *dwarf2Data,
1112 const DWARFUnit *cu,
1113 bool substitute_name_allowed) const {
1114 const char *name = nullptr;
1115
1116 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name,
1117 nullptr, true);
1118 if (name)
1119 return name;
1120
1121 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr,
1122 true);
1123 if (name)
1124 return name;
1125
1126 if (!substitute_name_allowed)
1127 return nullptr;
1128
1129 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true);
1130 return name;
1131 }
1132
1133 //----------------------------------------------------------------------
1134 // GetPubname
1135 //
1136 // Get value the name for a DIE as it should appear for a .debug_pubnames or
1137 // .debug_pubtypes section.
1138 //----------------------------------------------------------------------
GetPubname(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu) const1139 const char *DWARFDebugInfoEntry::GetPubname(SymbolFileDWARF *dwarf2Data,
1140 const DWARFUnit *cu) const {
1141 const char *name = nullptr;
1142 if (!dwarf2Data)
1143 return name;
1144
1145 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name,
1146 nullptr, true);
1147 if (name)
1148 return name;
1149
1150 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr,
1151 true);
1152 if (name)
1153 return name;
1154
1155 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true);
1156 return name;
1157 }
1158
1159 //----------------------------------------------------------------------
1160 // GetName
1161 //
1162 // Get value of the DW_AT_name attribute for a debug information entry that
1163 // exists at offset "die_offset" and place that value into the supplied stream
1164 // object. If the DIE is a NULL object "NULL" is placed into the stream, and if
1165 // no DW_AT_name attribute exists for the DIE then nothing is printed.
1166 //----------------------------------------------------------------------
GetName(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_offset_t die_offset,Stream & s)1167 bool DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data,
1168 const DWARFUnit *cu,
1169 const dw_offset_t die_offset, Stream &s) {
1170 if (dwarf2Data == NULL) {
1171 s.PutCString("NULL");
1172 return false;
1173 }
1174
1175 DWARFDebugInfoEntry die;
1176 lldb::offset_t offset = die_offset;
1177 if (die.Extract(dwarf2Data, cu, &offset)) {
1178 if (die.IsNULL()) {
1179 s.PutCString("NULL");
1180 return true;
1181 } else {
1182 const char *name = die.GetAttributeValueAsString(
1183 dwarf2Data, cu, DW_AT_name, nullptr, true);
1184 if (name) {
1185 s.PutCString(name);
1186 return true;
1187 }
1188 }
1189 }
1190 return false;
1191 }
1192
1193 //----------------------------------------------------------------------
1194 // AppendTypeName
1195 //
1196 // Follows the type name definition down through all needed tags to end up with
1197 // a fully qualified type name and dump the results to the supplied stream.
1198 // This is used to show the name of types given a type identifier.
1199 //----------------------------------------------------------------------
AppendTypeName(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,const dw_offset_t die_offset,Stream & s)1200 bool DWARFDebugInfoEntry::AppendTypeName(SymbolFileDWARF *dwarf2Data,
1201 const DWARFUnit *cu,
1202 const dw_offset_t die_offset,
1203 Stream &s) {
1204 if (dwarf2Data == NULL) {
1205 s.PutCString("NULL");
1206 return false;
1207 }
1208
1209 DWARFDebugInfoEntry die;
1210 lldb::offset_t offset = die_offset;
1211 if (die.Extract(dwarf2Data, cu, &offset)) {
1212 if (die.IsNULL()) {
1213 s.PutCString("NULL");
1214 return true;
1215 } else {
1216 const char *name = die.GetPubname(dwarf2Data, cu);
1217 if (name)
1218 s.PutCString(name);
1219 else {
1220 bool result = true;
1221 const DWARFAbbreviationDeclaration *abbrevDecl =
1222 die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
1223
1224 if (abbrevDecl == NULL)
1225 return false;
1226
1227 switch (abbrevDecl->Tag()) {
1228 case DW_TAG_array_type:
1229 break; // print out a "[]" after printing the full type of the element
1230 // below
1231 case DW_TAG_base_type:
1232 s.PutCString("base ");
1233 break;
1234 case DW_TAG_class_type:
1235 s.PutCString("class ");
1236 break;
1237 case DW_TAG_const_type:
1238 s.PutCString("const ");
1239 break;
1240 case DW_TAG_enumeration_type:
1241 s.PutCString("enum ");
1242 break;
1243 case DW_TAG_file_type:
1244 s.PutCString("file ");
1245 break;
1246 case DW_TAG_interface_type:
1247 s.PutCString("interface ");
1248 break;
1249 case DW_TAG_packed_type:
1250 s.PutCString("packed ");
1251 break;
1252 case DW_TAG_pointer_type:
1253 break; // print out a '*' after printing the full type below
1254 case DW_TAG_ptr_to_member_type:
1255 break; // print out a '*' after printing the full type below
1256 case DW_TAG_reference_type:
1257 break; // print out a '&' after printing the full type below
1258 case DW_TAG_restrict_type:
1259 s.PutCString("restrict ");
1260 break;
1261 case DW_TAG_set_type:
1262 s.PutCString("set ");
1263 break;
1264 case DW_TAG_shared_type:
1265 s.PutCString("shared ");
1266 break;
1267 case DW_TAG_string_type:
1268 s.PutCString("string ");
1269 break;
1270 case DW_TAG_structure_type:
1271 s.PutCString("struct ");
1272 break;
1273 case DW_TAG_subrange_type:
1274 s.PutCString("subrange ");
1275 break;
1276 case DW_TAG_subroutine_type:
1277 s.PutCString("function ");
1278 break;
1279 case DW_TAG_thrown_type:
1280 s.PutCString("thrown ");
1281 break;
1282 case DW_TAG_union_type:
1283 s.PutCString("union ");
1284 break;
1285 case DW_TAG_unspecified_type:
1286 s.PutCString("unspecified ");
1287 break;
1288 case DW_TAG_volatile_type:
1289 s.PutCString("volatile ");
1290 break;
1291 default:
1292 return false;
1293 }
1294
1295 // Follow the DW_AT_type if possible
1296 DWARFFormValue form_value;
1297 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) {
1298 uint64_t next_die_offset = form_value.Reference();
1299 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s);
1300 }
1301
1302 switch (abbrevDecl->Tag()) {
1303 case DW_TAG_array_type:
1304 s.PutCString("[]");
1305 break;
1306 case DW_TAG_pointer_type:
1307 s.PutChar('*');
1308 break;
1309 case DW_TAG_ptr_to_member_type:
1310 s.PutChar('*');
1311 break;
1312 case DW_TAG_reference_type:
1313 s.PutChar('&');
1314 break;
1315 default:
1316 break;
1317 }
1318 return result;
1319 }
1320 }
1321 }
1322 return false;
1323 }
1324
1325 //----------------------------------------------------------------------
1326 // BuildAddressRangeTable
1327 //----------------------------------------------------------------------
BuildAddressRangeTable(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,DWARFDebugAranges * debug_aranges) const1328 void DWARFDebugInfoEntry::BuildAddressRangeTable(
1329 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1330 DWARFDebugAranges *debug_aranges) const {
1331 if (m_tag) {
1332 if (m_tag == DW_TAG_subprogram) {
1333 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
1334 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
1335 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc,
1336 LLDB_INVALID_ADDRESS)) {
1337 /// printf("BuildAddressRangeTable() 0x%8.8x: %30s: [0x%8.8x -
1338 /// 0x%8.8x)\n", m_offset, DW_TAG_value_to_name(tag), lo_pc, hi_pc);
1339 debug_aranges->AppendRange(cu->GetOffset(), lo_pc, hi_pc);
1340 }
1341 }
1342
1343 const DWARFDebugInfoEntry *child = GetFirstChild();
1344 while (child) {
1345 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges);
1346 child = child->GetSibling();
1347 }
1348 }
1349 }
1350
1351 //----------------------------------------------------------------------
1352 // BuildFunctionAddressRangeTable
1353 //
1354 // This function is very similar to the BuildAddressRangeTable function except
1355 // that the actual DIE offset for the function is placed in the table instead
1356 // of the compile unit offset (which is the way the standard .debug_aranges
1357 // section does it).
1358 //----------------------------------------------------------------------
BuildFunctionAddressRangeTable(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,DWARFDebugAranges * debug_aranges) const1359 void DWARFDebugInfoEntry::BuildFunctionAddressRangeTable(
1360 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1361 DWARFDebugAranges *debug_aranges) const {
1362 if (m_tag) {
1363 if (m_tag == DW_TAG_subprogram) {
1364 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
1365 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
1366 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc,
1367 LLDB_INVALID_ADDRESS)) {
1368 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " -
1369 // 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY
1370 debug_aranges->AppendRange(GetOffset(), lo_pc, hi_pc);
1371 }
1372 }
1373
1374 const DWARFDebugInfoEntry *child = GetFirstChild();
1375 while (child) {
1376 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges);
1377 child = child->GetSibling();
1378 }
1379 }
1380 }
1381
GetDeclContextDIEs(DWARFUnit * cu,DWARFDIECollection & decl_context_dies) const1382 void DWARFDebugInfoEntry::GetDeclContextDIEs(
1383 DWARFUnit *cu, DWARFDIECollection &decl_context_dies) const {
1384
1385 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this));
1386 die.GetDeclContextDIEs(decl_context_dies);
1387 }
1388
GetDWARFDeclContext(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,DWARFDeclContext & dwarf_decl_ctx) const1389 void DWARFDebugInfoEntry::GetDWARFDeclContext(
1390 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu,
1391 DWARFDeclContext &dwarf_decl_ctx) const {
1392 const dw_tag_t tag = Tag();
1393 if (tag != DW_TAG_compile_unit && tag != DW_TAG_partial_unit) {
1394 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu));
1395 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu);
1396 if (parent_decl_ctx_die && parent_decl_ctx_die.GetDIE() != this) {
1397 if (parent_decl_ctx_die.Tag() != DW_TAG_compile_unit &&
1398 parent_decl_ctx_die.Tag() != DW_TAG_partial_unit)
1399 parent_decl_ctx_die.GetDIE()->GetDWARFDeclContext(
1400 parent_decl_ctx_die.GetDWARF(), parent_decl_ctx_die.GetCU(),
1401 dwarf_decl_ctx);
1402 }
1403 }
1404 }
1405
MatchesDWARFDeclContext(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,const DWARFDeclContext & dwarf_decl_ctx) const1406 bool DWARFDebugInfoEntry::MatchesDWARFDeclContext(
1407 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu,
1408 const DWARFDeclContext &dwarf_decl_ctx) const {
1409
1410 DWARFDeclContext this_dwarf_decl_ctx;
1411 GetDWARFDeclContext(dwarf2Data, cu, this_dwarf_decl_ctx);
1412 return this_dwarf_decl_ctx == dwarf_decl_ctx;
1413 }
1414
1415 DWARFDIE
GetParentDeclContextDIE(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu) const1416 DWARFDebugInfoEntry::GetParentDeclContextDIE(SymbolFileDWARF *dwarf2Data,
1417 DWARFUnit *cu) const {
1418 DWARFAttributes attributes;
1419 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes);
1420 return GetParentDeclContextDIE(dwarf2Data, cu, attributes);
1421 }
1422
1423 DWARFDIE
GetParentDeclContextDIE(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,const DWARFAttributes & attributes) const1424 DWARFDebugInfoEntry::GetParentDeclContextDIE(
1425 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu,
1426 const DWARFAttributes &attributes) const {
1427 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this));
1428
1429 while (die) {
1430 // If this is the original DIE that we are searching for a declaration for,
1431 // then don't look in the cache as we don't want our own decl context to be
1432 // our decl context...
1433 if (die.GetDIE() != this) {
1434 switch (die.Tag()) {
1435 case DW_TAG_compile_unit:
1436 case DW_TAG_partial_unit:
1437 case DW_TAG_namespace:
1438 case DW_TAG_structure_type:
1439 case DW_TAG_union_type:
1440 case DW_TAG_class_type:
1441 return die;
1442
1443 default:
1444 break;
1445 }
1446 }
1447
1448 dw_offset_t die_offset;
1449
1450 die_offset =
1451 attributes.FormValueAsUnsigned(DW_AT_specification, DW_INVALID_OFFSET);
1452 if (die_offset != DW_INVALID_OFFSET) {
1453 DWARFDIE spec_die = cu->GetDIE(die_offset);
1454 if (spec_die) {
1455 DWARFDIE decl_ctx_die = spec_die.GetParentDeclContextDIE();
1456 if (decl_ctx_die)
1457 return decl_ctx_die;
1458 }
1459 }
1460
1461 die_offset = attributes.FormValueAsUnsigned(DW_AT_abstract_origin,
1462 DW_INVALID_OFFSET);
1463 if (die_offset != DW_INVALID_OFFSET) {
1464 DWARFDIE abs_die = cu->GetDIE(die_offset);
1465 if (abs_die) {
1466 DWARFDIE decl_ctx_die = abs_die.GetParentDeclContextDIE();
1467 if (decl_ctx_die)
1468 return decl_ctx_die;
1469 }
1470 }
1471
1472 die = die.GetParent();
1473 }
1474 return DWARFDIE();
1475 }
1476
GetQualifiedName(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,std::string & storage) const1477 const char *DWARFDebugInfoEntry::GetQualifiedName(SymbolFileDWARF *dwarf2Data,
1478 DWARFUnit *cu,
1479 std::string &storage) const {
1480 DWARFAttributes attributes;
1481 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes);
1482 return GetQualifiedName(dwarf2Data, cu, attributes, storage);
1483 }
1484
GetQualifiedName(SymbolFileDWARF * dwarf2Data,DWARFUnit * cu,const DWARFAttributes & attributes,std::string & storage) const1485 const char *DWARFDebugInfoEntry::GetQualifiedName(
1486 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu,
1487 const DWARFAttributes &attributes, std::string &storage) const {
1488
1489 const char *name = GetName(dwarf2Data, cu);
1490
1491 if (name) {
1492 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu);
1493 storage.clear();
1494 // TODO: change this to get the correct decl context parent....
1495 while (parent_decl_ctx_die) {
1496 const dw_tag_t parent_tag = parent_decl_ctx_die.Tag();
1497 switch (parent_tag) {
1498 case DW_TAG_namespace: {
1499 const char *namespace_name = parent_decl_ctx_die.GetName();
1500 if (namespace_name) {
1501 storage.insert(0, "::");
1502 storage.insert(0, namespace_name);
1503 } else {
1504 storage.insert(0, "(anonymous namespace)::");
1505 }
1506 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE();
1507 } break;
1508
1509 case DW_TAG_class_type:
1510 case DW_TAG_structure_type:
1511 case DW_TAG_union_type: {
1512 const char *class_union_struct_name = parent_decl_ctx_die.GetName();
1513
1514 if (class_union_struct_name) {
1515 storage.insert(0, "::");
1516 storage.insert(0, class_union_struct_name);
1517 }
1518 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE();
1519 } break;
1520
1521 default:
1522 parent_decl_ctx_die.Clear();
1523 break;
1524 }
1525 }
1526
1527 if (storage.empty())
1528 storage.append("::");
1529
1530 storage.append(name);
1531 }
1532 if (storage.empty())
1533 return NULL;
1534 return storage.c_str();
1535 }
1536
1537 //----------------------------------------------------------------------
1538 // LookupAddress
1539 //----------------------------------------------------------------------
LookupAddress(const dw_addr_t address,SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,DWARFDebugInfoEntry ** function_die,DWARFDebugInfoEntry ** block_die)1540 bool DWARFDebugInfoEntry::LookupAddress(const dw_addr_t address,
1541 SymbolFileDWARF *dwarf2Data,
1542 const DWARFUnit *cu,
1543 DWARFDebugInfoEntry **function_die,
1544 DWARFDebugInfoEntry **block_die) {
1545 bool found_address = false;
1546 if (m_tag) {
1547 bool check_children = false;
1548 bool match_addr_range = false;
1549 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset,
1550 // DW_TAG_value_to_name(tag), address);
1551 switch (m_tag) {
1552 case DW_TAG_array_type:
1553 break;
1554 case DW_TAG_class_type:
1555 check_children = true;
1556 break;
1557 case DW_TAG_entry_point:
1558 break;
1559 case DW_TAG_enumeration_type:
1560 break;
1561 case DW_TAG_formal_parameter:
1562 break;
1563 case DW_TAG_imported_declaration:
1564 break;
1565 case DW_TAG_label:
1566 break;
1567 case DW_TAG_lexical_block:
1568 check_children = true;
1569 match_addr_range = true;
1570 break;
1571 case DW_TAG_member:
1572 break;
1573 case DW_TAG_pointer_type:
1574 break;
1575 case DW_TAG_reference_type:
1576 break;
1577 case DW_TAG_compile_unit:
1578 match_addr_range = true;
1579 break;
1580 case DW_TAG_string_type:
1581 break;
1582 case DW_TAG_structure_type:
1583 check_children = true;
1584 break;
1585 case DW_TAG_subroutine_type:
1586 break;
1587 case DW_TAG_typedef:
1588 break;
1589 case DW_TAG_union_type:
1590 break;
1591 case DW_TAG_unspecified_parameters:
1592 break;
1593 case DW_TAG_variant:
1594 break;
1595 case DW_TAG_common_block:
1596 check_children = true;
1597 break;
1598 case DW_TAG_common_inclusion:
1599 break;
1600 case DW_TAG_inheritance:
1601 break;
1602 case DW_TAG_inlined_subroutine:
1603 check_children = true;
1604 match_addr_range = true;
1605 break;
1606 case DW_TAG_module:
1607 match_addr_range = true;
1608 break;
1609 case DW_TAG_ptr_to_member_type:
1610 break;
1611 case DW_TAG_set_type:
1612 break;
1613 case DW_TAG_subrange_type:
1614 break;
1615 case DW_TAG_with_stmt:
1616 break;
1617 case DW_TAG_access_declaration:
1618 break;
1619 case DW_TAG_base_type:
1620 break;
1621 case DW_TAG_catch_block:
1622 match_addr_range = true;
1623 break;
1624 case DW_TAG_const_type:
1625 break;
1626 case DW_TAG_constant:
1627 break;
1628 case DW_TAG_enumerator:
1629 break;
1630 case DW_TAG_file_type:
1631 break;
1632 case DW_TAG_friend:
1633 break;
1634 case DW_TAG_namelist:
1635 break;
1636 case DW_TAG_namelist_item:
1637 break;
1638 case DW_TAG_packed_type:
1639 break;
1640 case DW_TAG_subprogram:
1641 match_addr_range = true;
1642 break;
1643 case DW_TAG_template_type_parameter:
1644 break;
1645 case DW_TAG_template_value_parameter:
1646 break;
1647 case DW_TAG_GNU_template_parameter_pack:
1648 break;
1649 case DW_TAG_thrown_type:
1650 break;
1651 case DW_TAG_try_block:
1652 match_addr_range = true;
1653 break;
1654 case DW_TAG_variant_part:
1655 break;
1656 case DW_TAG_variable:
1657 break;
1658 case DW_TAG_volatile_type:
1659 break;
1660 case DW_TAG_dwarf_procedure:
1661 break;
1662 case DW_TAG_restrict_type:
1663 break;
1664 case DW_TAG_interface_type:
1665 break;
1666 case DW_TAG_namespace:
1667 check_children = true;
1668 break;
1669 case DW_TAG_imported_module:
1670 break;
1671 case DW_TAG_unspecified_type:
1672 break;
1673 case DW_TAG_partial_unit:
1674 match_addr_range = true;
1675 break;
1676 case DW_TAG_imported_unit:
1677 break;
1678 case DW_TAG_shared_type:
1679 break;
1680 default:
1681 break;
1682 }
1683
1684 if (match_addr_range) {
1685 dw_addr_t lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc,
1686 LLDB_INVALID_ADDRESS);
1687 if (lo_pc != LLDB_INVALID_ADDRESS) {
1688 dw_addr_t hi_pc =
1689 GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS);
1690 if (hi_pc != LLDB_INVALID_ADDRESS) {
1691 // printf("\n0x%8.8x: %30s: address = 0x%8.8x [0x%8.8x - 0x%8.8x) ",
1692 // m_offset, DW_TAG_value_to_name(tag), address, lo_pc, hi_pc);
1693 if ((lo_pc <= address) && (address < hi_pc)) {
1694 found_address = true;
1695 // puts("***MATCH***");
1696 switch (m_tag) {
1697 case DW_TAG_compile_unit: // File
1698 case DW_TAG_partial_unit: // File
1699 check_children = ((function_die != NULL) || (block_die != NULL));
1700 break;
1701
1702 case DW_TAG_subprogram: // Function
1703 if (function_die)
1704 *function_die = this;
1705 check_children = (block_die != NULL);
1706 break;
1707
1708 case DW_TAG_inlined_subroutine: // Inlined Function
1709 case DW_TAG_lexical_block: // Block { } in code
1710 if (block_die) {
1711 *block_die = this;
1712 check_children = true;
1713 }
1714 break;
1715
1716 default:
1717 check_children = true;
1718 break;
1719 }
1720 }
1721 } else {
1722 // Compile units may not have a valid high/low pc when there
1723 // are address gaps in subroutines so we must always search
1724 // if there is no valid high and low PC.
1725 check_children = (m_tag == DW_TAG_compile_unit ||
1726 m_tag == DW_TAG_partial_unit) &&
1727 ((function_die != NULL) || (block_die != NULL));
1728 }
1729 } else {
1730 DWARFFormValue form_value;
1731 if (GetAttributeValue(dwarf2Data, cu, DW_AT_ranges, form_value)) {
1732 DWARFRangeList ranges;
1733 DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges();
1734 debug_ranges->FindRanges(
1735 cu, GetRangesOffset(debug_ranges, form_value), ranges);
1736
1737 if (ranges.FindEntryThatContains(address)) {
1738 found_address = true;
1739 // puts("***MATCH***");
1740 switch (m_tag) {
1741 case DW_TAG_compile_unit: // File
1742 case DW_TAG_partial_unit: // File
1743 check_children = ((function_die != NULL) || (block_die != NULL));
1744 break;
1745
1746 case DW_TAG_subprogram: // Function
1747 if (function_die)
1748 *function_die = this;
1749 check_children = (block_die != NULL);
1750 break;
1751
1752 case DW_TAG_inlined_subroutine: // Inlined Function
1753 case DW_TAG_lexical_block: // Block { } in code
1754 if (block_die) {
1755 *block_die = this;
1756 check_children = true;
1757 }
1758 break;
1759
1760 default:
1761 check_children = true;
1762 break;
1763 }
1764 } else {
1765 check_children = false;
1766 }
1767 }
1768 }
1769 }
1770
1771 if (check_children) {
1772 // printf("checking children\n");
1773 DWARFDebugInfoEntry *child = GetFirstChild();
1774 while (child) {
1775 if (child->LookupAddress(address, dwarf2Data, cu, function_die,
1776 block_die))
1777 return true;
1778 child = child->GetSibling();
1779 }
1780 }
1781 }
1782 return found_address;
1783 }
1784
1785 const DWARFAbbreviationDeclaration *
GetAbbreviationDeclarationPtr(SymbolFileDWARF * dwarf2Data,const DWARFUnit * cu,lldb::offset_t & offset) const1786 DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr(
1787 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
1788 lldb::offset_t &offset) const {
1789 if (dwarf2Data) {
1790 offset = GetOffset();
1791
1792 const DWARFAbbreviationDeclarationSet *abbrev_set = cu->GetAbbreviations();
1793 if (abbrev_set) {
1794 const DWARFAbbreviationDeclaration *abbrev_decl =
1795 abbrev_set->GetAbbreviationDeclaration(m_abbr_idx);
1796 if (abbrev_decl) {
1797 // Make sure the abbreviation code still matches. If it doesn't and the
1798 // DWARF data was mmap'ed, the backing file might have been modified
1799 // which is bad news.
1800 const uint64_t abbrev_code = cu->GetData().GetULEB128(&offset);
1801
1802 if (abbrev_decl->Code() == abbrev_code)
1803 return abbrev_decl;
1804
1805 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected(
1806 "0x%8.8x: the DWARF debug information has been modified (abbrev "
1807 "code was %u, and is now %u)",
1808 GetOffset(), (uint32_t)abbrev_decl->Code(), (uint32_t)abbrev_code);
1809 }
1810 }
1811 }
1812 offset = DW_INVALID_OFFSET;
1813 return NULL;
1814 }
1815
OffsetLessThan(const DWARFDebugInfoEntry & a,const DWARFDebugInfoEntry & b)1816 bool DWARFDebugInfoEntry::OffsetLessThan(const DWARFDebugInfoEntry &a,
1817 const DWARFDebugInfoEntry &b) {
1818 return a.GetOffset() < b.GetOffset();
1819 }
1820
DumpDIECollection(Stream & strm,DWARFDebugInfoEntry::collection & die_collection)1821 void DWARFDebugInfoEntry::DumpDIECollection(
1822 Stream &strm, DWARFDebugInfoEntry::collection &die_collection) {
1823 DWARFDebugInfoEntry::const_iterator pos;
1824 DWARFDebugInfoEntry::const_iterator end = die_collection.end();
1825 strm.PutCString("\noffset parent sibling child\n");
1826 strm.PutCString("-------- -------- -------- --------\n");
1827 for (pos = die_collection.begin(); pos != end; ++pos) {
1828 const DWARFDebugInfoEntry &die_ref = *pos;
1829 const DWARFDebugInfoEntry *p = die_ref.GetParent();
1830 const DWARFDebugInfoEntry *s = die_ref.GetSibling();
1831 const DWARFDebugInfoEntry *c = die_ref.GetFirstChild();
1832 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", die_ref.GetOffset(),
1833 p ? p->GetOffset() : 0, s ? s->GetOffset() : 0,
1834 c ? c->GetOffset() : 0, die_ref.Tag(),
1835 DW_TAG_value_to_name(die_ref.Tag()),
1836 die_ref.HasChildren() ? " *" : "");
1837 }
1838 }
1839
operator ==(const DWARFDebugInfoEntry & rhs) const1840 bool DWARFDebugInfoEntry::operator==(const DWARFDebugInfoEntry &rhs) const {
1841 return m_offset == rhs.m_offset && m_parent_idx == rhs.m_parent_idx &&
1842 m_sibling_idx == rhs.m_sibling_idx &&
1843 m_abbr_idx == rhs.m_abbr_idx && m_has_children == rhs.m_has_children &&
1844 m_tag == rhs.m_tag;
1845 }
1846
operator !=(const DWARFDebugInfoEntry & rhs) const1847 bool DWARFDebugInfoEntry::operator!=(const DWARFDebugInfoEntry &rhs) const {
1848 return !(*this == rhs);
1849 }
1850