1 //===-- SymbolFileDWARF.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 "SymbolFileDWARF.h"
11
12 // Other libraries and framework includes
13 #include "clang/AST/ASTConsumer.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/DeclGroup.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/Basic/Builtins.h"
20 #include "clang/Basic/IdentifierTable.h"
21 #include "clang/Basic/LangOptions.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "clang/Basic/TargetInfo.h"
24 #include "clang/Basic/Specifiers.h"
25 #include "clang/Sema/DeclSpec.h"
26
27 #include "llvm/Support/Casting.h"
28
29 #include "lldb/Core/Module.h"
30 #include "lldb/Core/PluginManager.h"
31 #include "lldb/Core/RegularExpression.h"
32 #include "lldb/Core/Scalar.h"
33 #include "lldb/Core/Section.h"
34 #include "lldb/Core/StreamFile.h"
35 #include "lldb/Core/StreamString.h"
36 #include "lldb/Core/Timer.h"
37 #include "lldb/Core/Value.h"
38
39 #include "lldb/Host/Host.h"
40
41 #include "lldb/Symbol/Block.h"
42 #include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
43 #include "lldb/Symbol/CompileUnit.h"
44 #include "lldb/Symbol/LineTable.h"
45 #include "lldb/Symbol/ObjectFile.h"
46 #include "lldb/Symbol/SymbolVendor.h"
47 #include "lldb/Symbol/VariableList.h"
48
49 #include "lldb/Target/ObjCLanguageRuntime.h"
50 #include "lldb/Target/CPPLanguageRuntime.h"
51
52 #include "DWARFCompileUnit.h"
53 #include "DWARFDebugAbbrev.h"
54 #include "DWARFDebugAranges.h"
55 #include "DWARFDebugInfo.h"
56 #include "DWARFDebugInfoEntry.h"
57 #include "DWARFDebugLine.h"
58 #include "DWARFDebugPubnames.h"
59 #include "DWARFDebugRanges.h"
60 #include "DWARFDeclContext.h"
61 #include "DWARFDIECollection.h"
62 #include "DWARFFormValue.h"
63 #include "DWARFLocationList.h"
64 #include "LogChannelDWARF.h"
65 #include "SymbolFileDWARFDebugMap.h"
66
67 #include <map>
68
69 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
70
71 #ifdef ENABLE_DEBUG_PRINTF
72 #include <stdio.h>
73 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
74 #else
75 #define DEBUG_PRINTF(fmt, ...)
76 #endif
77
78 #define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
79
80 using namespace lldb;
81 using namespace lldb_private;
82
83 //static inline bool
84 //child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
85 //{
86 // switch (tag)
87 // {
88 // default:
89 // break;
90 // case DW_TAG_subprogram:
91 // case DW_TAG_inlined_subroutine:
92 // case DW_TAG_class_type:
93 // case DW_TAG_structure_type:
94 // case DW_TAG_union_type:
95 // return true;
96 // }
97 // return false;
98 //}
99 //
100 static AccessType
DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility)101 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
102 {
103 switch (dwarf_accessibility)
104 {
105 case DW_ACCESS_public: return eAccessPublic;
106 case DW_ACCESS_private: return eAccessPrivate;
107 case DW_ACCESS_protected: return eAccessProtected;
108 default: break;
109 }
110 return eAccessNone;
111 }
112
113 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
114
115 class DIEStack
116 {
117 public:
118
Push(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die)119 void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
120 {
121 m_dies.push_back (DIEInfo(cu, die));
122 }
123
124
LogDIEs(Log * log,SymbolFileDWARF * dwarf)125 void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
126 {
127 StreamString log_strm;
128 const size_t n = m_dies.size();
129 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
130 for (size_t i=0; i<n; i++)
131 {
132 DWARFCompileUnit *cu = m_dies[i].cu;
133 const DWARFDebugInfoEntry *die = m_dies[i].die;
134 std::string qualified_name;
135 die->GetQualifiedName(dwarf, cu, qualified_name);
136 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
137 (uint64_t)i,
138 die->GetOffset(),
139 DW_TAG_value_to_name(die->Tag()),
140 qualified_name.c_str());
141 }
142 log->PutCString(log_strm.GetData());
143 }
Pop()144 void Pop ()
145 {
146 m_dies.pop_back();
147 }
148
149 class ScopedPopper
150 {
151 public:
ScopedPopper(DIEStack & die_stack)152 ScopedPopper (DIEStack &die_stack) :
153 m_die_stack (die_stack),
154 m_valid (false)
155 {
156 }
157
158 void
Push(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die)159 Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
160 {
161 m_valid = true;
162 m_die_stack.Push (cu, die);
163 }
164
~ScopedPopper()165 ~ScopedPopper ()
166 {
167 if (m_valid)
168 m_die_stack.Pop();
169 }
170
171
172
173 protected:
174 DIEStack &m_die_stack;
175 bool m_valid;
176 };
177
178 protected:
179 struct DIEInfo {
DIEInfoDIEStack::DIEInfo180 DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
181 cu(c),
182 die(d)
183 {
184 }
185 DWARFCompileUnit *cu;
186 const DWARFDebugInfoEntry *die;
187 };
188 typedef std::vector<DIEInfo> Stack;
189 Stack m_dies;
190 };
191 #endif
192
193 void
Initialize()194 SymbolFileDWARF::Initialize()
195 {
196 LogChannelDWARF::Initialize();
197 PluginManager::RegisterPlugin (GetPluginNameStatic(),
198 GetPluginDescriptionStatic(),
199 CreateInstance);
200 }
201
202 void
Terminate()203 SymbolFileDWARF::Terminate()
204 {
205 PluginManager::UnregisterPlugin (CreateInstance);
206 LogChannelDWARF::Initialize();
207 }
208
209
210 lldb_private::ConstString
GetPluginNameStatic()211 SymbolFileDWARF::GetPluginNameStatic()
212 {
213 static ConstString g_name("dwarf");
214 return g_name;
215 }
216
217 const char *
GetPluginDescriptionStatic()218 SymbolFileDWARF::GetPluginDescriptionStatic()
219 {
220 return "DWARF and DWARF3 debug symbol file reader.";
221 }
222
223
224 SymbolFile*
CreateInstance(ObjectFile * obj_file)225 SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
226 {
227 return new SymbolFileDWARF(obj_file);
228 }
229
230 TypeList *
GetTypeList()231 SymbolFileDWARF::GetTypeList ()
232 {
233 if (GetDebugMapSymfile ())
234 return m_debug_map_symfile->GetTypeList();
235 return m_obj_file->GetModule()->GetTypeList();
236
237 }
238 void
GetTypes(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die,dw_offset_t min_die_offset,dw_offset_t max_die_offset,uint32_t type_mask,TypeSet & type_set)239 SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
240 const DWARFDebugInfoEntry *die,
241 dw_offset_t min_die_offset,
242 dw_offset_t max_die_offset,
243 uint32_t type_mask,
244 TypeSet &type_set)
245 {
246 if (cu)
247 {
248 if (die)
249 {
250 const dw_offset_t die_offset = die->GetOffset();
251
252 if (die_offset >= max_die_offset)
253 return;
254
255 if (die_offset >= min_die_offset)
256 {
257 const dw_tag_t tag = die->Tag();
258
259 bool add_type = false;
260
261 switch (tag)
262 {
263 case DW_TAG_array_type: add_type = (type_mask & eTypeClassArray ) != 0; break;
264 case DW_TAG_unspecified_type:
265 case DW_TAG_base_type: add_type = (type_mask & eTypeClassBuiltin ) != 0; break;
266 case DW_TAG_class_type: add_type = (type_mask & eTypeClassClass ) != 0; break;
267 case DW_TAG_structure_type: add_type = (type_mask & eTypeClassStruct ) != 0; break;
268 case DW_TAG_union_type: add_type = (type_mask & eTypeClassUnion ) != 0; break;
269 case DW_TAG_enumeration_type: add_type = (type_mask & eTypeClassEnumeration ) != 0; break;
270 case DW_TAG_subroutine_type:
271 case DW_TAG_subprogram:
272 case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction ) != 0; break;
273 case DW_TAG_pointer_type: add_type = (type_mask & eTypeClassPointer ) != 0; break;
274 case DW_TAG_rvalue_reference_type:
275 case DW_TAG_reference_type: add_type = (type_mask & eTypeClassReference ) != 0; break;
276 case DW_TAG_typedef: add_type = (type_mask & eTypeClassTypedef ) != 0; break;
277 case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
278 }
279
280 if (add_type)
281 {
282 const bool assert_not_being_parsed = true;
283 Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
284 if (type)
285 {
286 if (type_set.find(type) == type_set.end())
287 type_set.insert(type);
288 }
289 }
290 }
291
292 for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
293 child_die != NULL;
294 child_die = child_die->GetSibling())
295 {
296 GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
297 }
298 }
299 }
300 }
301
302 size_t
GetTypes(SymbolContextScope * sc_scope,uint32_t type_mask,TypeList & type_list)303 SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
304 uint32_t type_mask,
305 TypeList &type_list)
306
307 {
308 TypeSet type_set;
309
310 CompileUnit *comp_unit = NULL;
311 DWARFCompileUnit* dwarf_cu = NULL;
312 if (sc_scope)
313 comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
314
315 if (comp_unit)
316 {
317 dwarf_cu = GetDWARFCompileUnit(comp_unit);
318 if (dwarf_cu == 0)
319 return 0;
320 GetTypes (dwarf_cu,
321 dwarf_cu->DIE(),
322 dwarf_cu->GetOffset(),
323 dwarf_cu->GetNextCompileUnitOffset(),
324 type_mask,
325 type_set);
326 }
327 else
328 {
329 DWARFDebugInfo* info = DebugInfo();
330 if (info)
331 {
332 const size_t num_cus = info->GetNumCompileUnits();
333 for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
334 {
335 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
336 if (dwarf_cu)
337 {
338 GetTypes (dwarf_cu,
339 dwarf_cu->DIE(),
340 0,
341 UINT32_MAX,
342 type_mask,
343 type_set);
344 }
345 }
346 }
347 }
348 // if (m_using_apple_tables)
349 // {
350 // DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
351 // if (apple_types)
352 // {
353 // apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
354 //
355 // for (auto die_info: die_info_array)
356 // {
357 // bool add_type = TagMatchesTypeMask (type_mask, 0);
358 // if (!add_type)
359 // {
360 // dw_tag_t tag = die_info.tag;
361 // if (tag == 0)
362 // {
363 // const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
364 // tag = die->Tag();
365 // }
366 // add_type = TagMatchesTypeMask (type_mask, tag);
367 // }
368 // if (add_type)
369 // {
370 // Type *type = ResolveTypeUID(die_info.offset);
371 //
372 // if (type_set.find(type) == type_set.end())
373 // type_set.insert(type);
374 // }
375 // }
376 // return true; // Keep iterating
377 // });
378 // }
379 // }
380 // else
381 // {
382 // if (!m_indexed)
383 // Index ();
384 //
385 // m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
386 //
387 // bool add_type = TagMatchesTypeMask (type_mask, 0);
388 //
389 // if (!add_type)
390 // {
391 // const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
392 // if (die)
393 // {
394 // const dw_tag_t tag = die->Tag();
395 // add_type = TagMatchesTypeMask (type_mask, tag);
396 // }
397 // }
398 //
399 // if (add_type)
400 // {
401 // Type *type = ResolveTypeUID(die_offset);
402 //
403 // if (type_set.find(type) == type_set.end())
404 // type_set.insert(type);
405 // }
406 // return true; // Keep iterating
407 // });
408 // }
409
410 std::set<ClangASTType> clang_type_set;
411 size_t num_types_added = 0;
412 for (Type *type : type_set)
413 {
414 ClangASTType clang_type = type->GetClangForwardType();
415 if (clang_type_set.find(clang_type) == clang_type_set.end())
416 {
417 clang_type_set.insert(clang_type);
418 type_list.Insert (type->shared_from_this());
419 ++num_types_added;
420 }
421 }
422 return num_types_added;
423 }
424
425
426 //----------------------------------------------------------------------
427 // Gets the first parent that is a lexical block, function or inlined
428 // subroutine, or compile unit.
429 //----------------------------------------------------------------------
430 static const DWARFDebugInfoEntry *
GetParentSymbolContextDIE(const DWARFDebugInfoEntry * child_die)431 GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
432 {
433 const DWARFDebugInfoEntry *die;
434 for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
435 {
436 dw_tag_t tag = die->Tag();
437
438 switch (tag)
439 {
440 case DW_TAG_compile_unit:
441 case DW_TAG_subprogram:
442 case DW_TAG_inlined_subroutine:
443 case DW_TAG_lexical_block:
444 return die;
445 }
446 }
447 return NULL;
448 }
449
450
SymbolFileDWARF(ObjectFile * objfile)451 SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
452 SymbolFile (objfile),
453 UserID (0), // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
454 m_debug_map_module_wp (),
455 m_debug_map_symfile (NULL),
456 m_clang_tu_decl (NULL),
457 m_flags(),
458 m_data_debug_abbrev (),
459 m_data_debug_aranges (),
460 m_data_debug_frame (),
461 m_data_debug_info (),
462 m_data_debug_line (),
463 m_data_debug_loc (),
464 m_data_debug_ranges (),
465 m_data_debug_str (),
466 m_data_apple_names (),
467 m_data_apple_types (),
468 m_data_apple_namespaces (),
469 m_abbr(),
470 m_info(),
471 m_line(),
472 m_apple_names_ap (),
473 m_apple_types_ap (),
474 m_apple_namespaces_ap (),
475 m_apple_objc_ap (),
476 m_function_basename_index(),
477 m_function_fullname_index(),
478 m_function_method_index(),
479 m_function_selector_index(),
480 m_objc_class_selectors_index(),
481 m_global_index(),
482 m_type_index(),
483 m_namespace_index(),
484 m_indexed (false),
485 m_is_external_ast_source (false),
486 m_using_apple_tables (false),
487 m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
488 m_ranges(),
489 m_unique_ast_type_map ()
490 {
491 }
492
~SymbolFileDWARF()493 SymbolFileDWARF::~SymbolFileDWARF()
494 {
495 if (m_is_external_ast_source)
496 {
497 ModuleSP module_sp (m_obj_file->GetModule());
498 if (module_sp)
499 module_sp->GetClangASTContext().RemoveExternalSource ();
500 }
501 }
502
503 static const ConstString &
GetDWARFMachOSegmentName()504 GetDWARFMachOSegmentName ()
505 {
506 static ConstString g_dwarf_section_name ("__DWARF");
507 return g_dwarf_section_name;
508 }
509
510 UniqueDWARFASTTypeMap &
GetUniqueDWARFASTTypeMap()511 SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
512 {
513 if (GetDebugMapSymfile ())
514 return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
515 return m_unique_ast_type_map;
516 }
517
518 ClangASTContext &
GetClangASTContext()519 SymbolFileDWARF::GetClangASTContext ()
520 {
521 if (GetDebugMapSymfile ())
522 return m_debug_map_symfile->GetClangASTContext ();
523
524 ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
525 if (!m_is_external_ast_source)
526 {
527 m_is_external_ast_source = true;
528 llvm::OwningPtr<clang::ExternalASTSource> ast_source_ap (
529 new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
530 SymbolFileDWARF::CompleteObjCInterfaceDecl,
531 SymbolFileDWARF::FindExternalVisibleDeclsByName,
532 SymbolFileDWARF::LayoutRecordType,
533 this));
534 ast.SetExternalSource (ast_source_ap);
535 }
536 return ast;
537 }
538
539 void
InitializeObject()540 SymbolFileDWARF::InitializeObject()
541 {
542 // Install our external AST source callbacks so we can complete Clang types.
543 ModuleSP module_sp (m_obj_file->GetModule());
544 if (module_sp)
545 {
546 const SectionList *section_list = module_sp->GetSectionList();
547
548 const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
549
550 // Memory map the DWARF mach-o segment so we have everything mmap'ed
551 // to keep our heap memory usage down.
552 if (section)
553 m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
554 }
555 get_apple_names_data();
556 if (m_data_apple_names.GetByteSize() > 0)
557 {
558 m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
559 if (m_apple_names_ap->IsValid())
560 m_using_apple_tables = true;
561 else
562 m_apple_names_ap.reset();
563 }
564 get_apple_types_data();
565 if (m_data_apple_types.GetByteSize() > 0)
566 {
567 m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
568 if (m_apple_types_ap->IsValid())
569 m_using_apple_tables = true;
570 else
571 m_apple_types_ap.reset();
572 }
573
574 get_apple_namespaces_data();
575 if (m_data_apple_namespaces.GetByteSize() > 0)
576 {
577 m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
578 if (m_apple_namespaces_ap->IsValid())
579 m_using_apple_tables = true;
580 else
581 m_apple_namespaces_ap.reset();
582 }
583
584 get_apple_objc_data();
585 if (m_data_apple_objc.GetByteSize() > 0)
586 {
587 m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
588 if (m_apple_objc_ap->IsValid())
589 m_using_apple_tables = true;
590 else
591 m_apple_objc_ap.reset();
592 }
593 }
594
595 bool
SupportedVersion(uint16_t version)596 SymbolFileDWARF::SupportedVersion(uint16_t version)
597 {
598 return version == 2 || version == 3 || version == 4;
599 }
600
601 uint32_t
CalculateAbilities()602 SymbolFileDWARF::CalculateAbilities ()
603 {
604 uint32_t abilities = 0;
605 if (m_obj_file != NULL)
606 {
607 const Section* section = NULL;
608 const SectionList *section_list = m_obj_file->GetSectionList();
609 if (section_list == NULL)
610 return 0;
611
612 uint64_t debug_abbrev_file_size = 0;
613 uint64_t debug_info_file_size = 0;
614 uint64_t debug_line_file_size = 0;
615
616 section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
617
618 if (section)
619 section_list = §ion->GetChildren ();
620
621 section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
622 if (section != NULL)
623 {
624 debug_info_file_size = section->GetFileSize();
625
626 section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
627 if (section)
628 debug_abbrev_file_size = section->GetFileSize();
629 else
630 m_flags.Set (flagsGotDebugAbbrevData);
631
632 section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
633 if (!section)
634 m_flags.Set (flagsGotDebugArangesData);
635
636 section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
637 if (!section)
638 m_flags.Set (flagsGotDebugFrameData);
639
640 section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
641 if (section)
642 debug_line_file_size = section->GetFileSize();
643 else
644 m_flags.Set (flagsGotDebugLineData);
645
646 section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
647 if (!section)
648 m_flags.Set (flagsGotDebugLocData);
649
650 section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
651 if (!section)
652 m_flags.Set (flagsGotDebugMacInfoData);
653
654 section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
655 if (!section)
656 m_flags.Set (flagsGotDebugPubNamesData);
657
658 section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
659 if (!section)
660 m_flags.Set (flagsGotDebugPubTypesData);
661
662 section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
663 if (!section)
664 m_flags.Set (flagsGotDebugRangesData);
665
666 section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
667 if (!section)
668 m_flags.Set (flagsGotDebugStrData);
669 }
670 else
671 {
672 const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
673 if (symfile_dir_cstr)
674 {
675 if (strcasestr(symfile_dir_cstr, ".dsym"))
676 {
677 if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
678 {
679 // We have a dSYM file that didn't have a any debug info.
680 // If the string table has a size of 1, then it was made from
681 // an executable with no debug info, or from an executable that
682 // was stripped.
683 section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
684 if (section && section->GetFileSize() == 1)
685 {
686 m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
687 }
688 }
689 }
690 }
691 }
692
693 if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
694 abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
695
696 if (debug_line_file_size > 0)
697 abilities |= LineTables;
698 }
699 return abilities;
700 }
701
702 const DWARFDataExtractor&
GetCachedSectionData(uint32_t got_flag,SectionType sect_type,DWARFDataExtractor & data)703 SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
704 {
705 if (m_flags.IsClear (got_flag))
706 {
707 ModuleSP module_sp (m_obj_file->GetModule());
708 m_flags.Set (got_flag);
709 const SectionList *section_list = module_sp->GetSectionList();
710 if (section_list)
711 {
712 SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
713 if (section_sp)
714 {
715 // See if we memory mapped the DWARF segment?
716 if (m_dwarf_data.GetByteSize())
717 {
718 data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
719 }
720 else
721 {
722 if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
723 data.Clear();
724 }
725 }
726 }
727 }
728 return data;
729 }
730
731 const DWARFDataExtractor&
get_debug_abbrev_data()732 SymbolFileDWARF::get_debug_abbrev_data()
733 {
734 return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
735 }
736
737 const DWARFDataExtractor&
get_debug_aranges_data()738 SymbolFileDWARF::get_debug_aranges_data()
739 {
740 return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
741 }
742
743 const DWARFDataExtractor&
get_debug_frame_data()744 SymbolFileDWARF::get_debug_frame_data()
745 {
746 return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
747 }
748
749 const DWARFDataExtractor&
get_debug_info_data()750 SymbolFileDWARF::get_debug_info_data()
751 {
752 return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
753 }
754
755 const DWARFDataExtractor&
get_debug_line_data()756 SymbolFileDWARF::get_debug_line_data()
757 {
758 return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
759 }
760
761 const DWARFDataExtractor&
get_debug_loc_data()762 SymbolFileDWARF::get_debug_loc_data()
763 {
764 return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
765 }
766
767 const DWARFDataExtractor&
get_debug_ranges_data()768 SymbolFileDWARF::get_debug_ranges_data()
769 {
770 return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
771 }
772
773 const DWARFDataExtractor&
get_debug_str_data()774 SymbolFileDWARF::get_debug_str_data()
775 {
776 return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
777 }
778
779 const DWARFDataExtractor&
get_apple_names_data()780 SymbolFileDWARF::get_apple_names_data()
781 {
782 return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
783 }
784
785 const DWARFDataExtractor&
get_apple_types_data()786 SymbolFileDWARF::get_apple_types_data()
787 {
788 return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
789 }
790
791 const DWARFDataExtractor&
get_apple_namespaces_data()792 SymbolFileDWARF::get_apple_namespaces_data()
793 {
794 return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
795 }
796
797 const DWARFDataExtractor&
get_apple_objc_data()798 SymbolFileDWARF::get_apple_objc_data()
799 {
800 return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
801 }
802
803
804 DWARFDebugAbbrev*
DebugAbbrev()805 SymbolFileDWARF::DebugAbbrev()
806 {
807 if (m_abbr.get() == NULL)
808 {
809 const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
810 if (debug_abbrev_data.GetByteSize() > 0)
811 {
812 m_abbr.reset(new DWARFDebugAbbrev());
813 if (m_abbr.get())
814 m_abbr->Parse(debug_abbrev_data);
815 }
816 }
817 return m_abbr.get();
818 }
819
820 const DWARFDebugAbbrev*
DebugAbbrev() const821 SymbolFileDWARF::DebugAbbrev() const
822 {
823 return m_abbr.get();
824 }
825
826
827 DWARFDebugInfo*
DebugInfo()828 SymbolFileDWARF::DebugInfo()
829 {
830 if (m_info.get() == NULL)
831 {
832 Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
833 if (get_debug_info_data().GetByteSize() > 0)
834 {
835 m_info.reset(new DWARFDebugInfo());
836 if (m_info.get())
837 {
838 m_info->SetDwarfData(this);
839 }
840 }
841 }
842 return m_info.get();
843 }
844
845 const DWARFDebugInfo*
DebugInfo() const846 SymbolFileDWARF::DebugInfo() const
847 {
848 return m_info.get();
849 }
850
851 DWARFCompileUnit*
GetDWARFCompileUnit(lldb_private::CompileUnit * comp_unit)852 SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
853 {
854 DWARFDebugInfo* info = DebugInfo();
855 if (info)
856 {
857 if (GetDebugMapSymfile ())
858 {
859 // The debug map symbol file made the compile units for this DWARF
860 // file which is .o file with DWARF in it, and we should have
861 // only 1 compile unit which is at offset zero in the DWARF.
862 // TODO: modify to support LTO .o files where each .o file might
863 // have multiple DW_TAG_compile_unit tags.
864 return info->GetCompileUnit(0).get();
865 }
866 else
867 {
868 // Just a normal DWARF file whose user ID for the compile unit is
869 // the DWARF offset itself
870 return info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
871 }
872 }
873 return NULL;
874 }
875
876
877 DWARFDebugRanges*
DebugRanges()878 SymbolFileDWARF::DebugRanges()
879 {
880 if (m_ranges.get() == NULL)
881 {
882 Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p", __PRETTY_FUNCTION__, this);
883 if (get_debug_ranges_data().GetByteSize() > 0)
884 {
885 m_ranges.reset(new DWARFDebugRanges());
886 if (m_ranges.get())
887 m_ranges->Extract(this);
888 }
889 }
890 return m_ranges.get();
891 }
892
893 const DWARFDebugRanges*
DebugRanges() const894 SymbolFileDWARF::DebugRanges() const
895 {
896 return m_ranges.get();
897 }
898
899 lldb::CompUnitSP
ParseCompileUnit(DWARFCompileUnit * dwarf_cu,uint32_t cu_idx)900 SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
901 {
902 CompUnitSP cu_sp;
903 if (dwarf_cu)
904 {
905 CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
906 if (comp_unit)
907 {
908 // We already parsed this compile unit, had out a shared pointer to it
909 cu_sp = comp_unit->shared_from_this();
910 }
911 else
912 {
913 if (GetDebugMapSymfile ())
914 {
915 // Let the debug map create the compile unit
916 cu_sp = m_debug_map_symfile->GetCompileUnit(this);
917 dwarf_cu->SetUserData(cu_sp.get());
918 }
919 else
920 {
921 ModuleSP module_sp (m_obj_file->GetModule());
922 if (module_sp)
923 {
924 const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
925 if (cu_die)
926 {
927 const char * cu_die_name = cu_die->GetName(this, dwarf_cu);
928 const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
929 LanguageType cu_language = (LanguageType)cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
930 if (cu_die_name)
931 {
932 std::string ramapped_file;
933 FileSpec cu_file_spec;
934
935 if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
936 {
937 // If we have a full path to the compile unit, we don't need to resolve
938 // the file. This can be expensive e.g. when the source files are NFS mounted.
939 if (module_sp->RemapSourceFile(cu_die_name, ramapped_file))
940 cu_file_spec.SetFile (ramapped_file.c_str(), false);
941 else
942 cu_file_spec.SetFile (cu_die_name, false);
943 }
944 else
945 {
946 std::string fullpath(cu_comp_dir);
947 if (*fullpath.rbegin() != '/')
948 fullpath += '/';
949 fullpath += cu_die_name;
950 if (module_sp->RemapSourceFile (fullpath.c_str(), ramapped_file))
951 cu_file_spec.SetFile (ramapped_file.c_str(), false);
952 else
953 cu_file_spec.SetFile (fullpath.c_str(), false);
954 }
955
956 cu_sp.reset(new CompileUnit (module_sp,
957 dwarf_cu,
958 cu_file_spec,
959 MakeUserID(dwarf_cu->GetOffset()),
960 cu_language));
961 if (cu_sp)
962 {
963 dwarf_cu->SetUserData(cu_sp.get());
964
965 // Figure out the compile unit index if we weren't given one
966 if (cu_idx == UINT32_MAX)
967 DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
968
969 m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
970 }
971 }
972 }
973 }
974 }
975 }
976 }
977 return cu_sp;
978 }
979
980 uint32_t
GetNumCompileUnits()981 SymbolFileDWARF::GetNumCompileUnits()
982 {
983 DWARFDebugInfo* info = DebugInfo();
984 if (info)
985 return info->GetNumCompileUnits();
986 return 0;
987 }
988
989 CompUnitSP
ParseCompileUnitAtIndex(uint32_t cu_idx)990 SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
991 {
992 CompUnitSP cu_sp;
993 DWARFDebugInfo* info = DebugInfo();
994 if (info)
995 {
996 DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
997 if (dwarf_cu)
998 cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
999 }
1000 return cu_sp;
1001 }
1002
1003 static void
AddRangesToBlock(Block & block,DWARFDebugRanges::RangeList & ranges,addr_t block_base_addr)1004 AddRangesToBlock (Block& block,
1005 DWARFDebugRanges::RangeList& ranges,
1006 addr_t block_base_addr)
1007 {
1008 const size_t num_ranges = ranges.GetSize();
1009 for (size_t i = 0; i<num_ranges; ++i)
1010 {
1011 const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
1012 const addr_t range_base = range.GetRangeBase();
1013 assert (range_base >= block_base_addr);
1014 block.AddRange(Block::Range (range_base - block_base_addr, range.GetByteSize()));;
1015 }
1016 block.FinalizeRanges ();
1017 }
1018
1019
1020 Function *
ParseCompileUnitFunction(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die)1021 SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
1022 {
1023 DWARFDebugRanges::RangeList func_ranges;
1024 const char *name = NULL;
1025 const char *mangled = NULL;
1026 int decl_file = 0;
1027 int decl_line = 0;
1028 int decl_column = 0;
1029 int call_file = 0;
1030 int call_line = 0;
1031 int call_column = 0;
1032 DWARFExpression frame_base;
1033
1034 assert (die->Tag() == DW_TAG_subprogram);
1035
1036 if (die->Tag() != DW_TAG_subprogram)
1037 return NULL;
1038
1039 if (die->GetDIENamesAndRanges (this,
1040 dwarf_cu,
1041 name,
1042 mangled,
1043 func_ranges,
1044 decl_file,
1045 decl_line,
1046 decl_column,
1047 call_file,
1048 call_line,
1049 call_column,
1050 &frame_base))
1051 {
1052 // Union of all ranges in the function DIE (if the function is discontiguous)
1053 AddressRange func_range;
1054 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
1055 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
1056 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
1057 {
1058 ModuleSP module_sp (m_obj_file->GetModule());
1059 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
1060 if (func_range.GetBaseAddress().IsValid())
1061 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
1062 }
1063
1064 if (func_range.GetBaseAddress().IsValid())
1065 {
1066 Mangled func_name;
1067 if (mangled)
1068 func_name.SetValue(ConstString(mangled), true);
1069 else if (name)
1070 func_name.SetValue(ConstString(name), false);
1071
1072 FunctionSP func_sp;
1073 std::unique_ptr<Declaration> decl_ap;
1074 if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1075 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1076 decl_line,
1077 decl_column));
1078
1079 // Supply the type _only_ if it has already been parsed
1080 Type *func_type = m_die_to_type.lookup (die);
1081
1082 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
1083
1084 if (FixupAddress (func_range.GetBaseAddress()))
1085 {
1086 const user_id_t func_user_id = MakeUserID(die->GetOffset());
1087 func_sp.reset(new Function (sc.comp_unit,
1088 MakeUserID(func_user_id), // UserID is the DIE offset
1089 MakeUserID(func_user_id),
1090 func_name,
1091 func_type,
1092 func_range)); // first address range
1093
1094 if (func_sp.get() != NULL)
1095 {
1096 if (frame_base.IsValid())
1097 func_sp->GetFrameBaseExpression() = frame_base;
1098 sc.comp_unit->AddFunction(func_sp);
1099 return func_sp.get();
1100 }
1101 }
1102 }
1103 }
1104 return NULL;
1105 }
1106
1107 bool
FixupAddress(Address & addr)1108 SymbolFileDWARF::FixupAddress (Address &addr)
1109 {
1110 SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
1111 if (debug_map_symfile)
1112 {
1113 return debug_map_symfile->LinkOSOAddress(addr);
1114 }
1115 // This is a normal DWARF file, no address fixups need to happen
1116 return true;
1117 }
1118 lldb::LanguageType
ParseCompileUnitLanguage(const SymbolContext & sc)1119 SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
1120 {
1121 assert (sc.comp_unit);
1122 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1123 if (dwarf_cu)
1124 {
1125 const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
1126 if (die)
1127 {
1128 const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
1129 if (language)
1130 return (lldb::LanguageType)language;
1131 }
1132 }
1133 return eLanguageTypeUnknown;
1134 }
1135
1136 size_t
ParseCompileUnitFunctions(const SymbolContext & sc)1137 SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
1138 {
1139 assert (sc.comp_unit);
1140 size_t functions_added = 0;
1141 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1142 if (dwarf_cu)
1143 {
1144 DWARFDIECollection function_dies;
1145 const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
1146 size_t func_idx;
1147 for (func_idx = 0; func_idx < num_functions; ++func_idx)
1148 {
1149 const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
1150 if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
1151 {
1152 if (ParseCompileUnitFunction(sc, dwarf_cu, die))
1153 ++functions_added;
1154 }
1155 }
1156 //FixupTypes();
1157 }
1158 return functions_added;
1159 }
1160
1161 bool
ParseCompileUnitSupportFiles(const SymbolContext & sc,FileSpecList & support_files)1162 SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
1163 {
1164 assert (sc.comp_unit);
1165 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1166 if (dwarf_cu)
1167 {
1168 const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1169
1170 if (cu_die)
1171 {
1172 const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
1173 dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1174
1175 // All file indexes in DWARF are one based and a file of index zero is
1176 // supposed to be the compile unit itself.
1177 support_files.Append (*sc.comp_unit);
1178
1179 return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
1180 }
1181 }
1182 return false;
1183 }
1184
1185 struct ParseDWARFLineTableCallbackInfo
1186 {
1187 LineTable* line_table;
1188 std::unique_ptr<LineSequence> sequence_ap;
1189 };
1190
1191 //----------------------------------------------------------------------
1192 // ParseStatementTableCallback
1193 //----------------------------------------------------------------------
1194 static void
ParseDWARFLineTableCallback(dw_offset_t offset,const DWARFDebugLine::State & state,void * userData)1195 ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
1196 {
1197 if (state.row == DWARFDebugLine::State::StartParsingLineTable)
1198 {
1199 // Just started parsing the line table
1200 }
1201 else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
1202 {
1203 // Done parsing line table, nothing to do for the cleanup
1204 }
1205 else
1206 {
1207 ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
1208 LineTable* line_table = info->line_table;
1209
1210 // If this is our first time here, we need to create a
1211 // sequence container.
1212 if (!info->sequence_ap.get())
1213 {
1214 info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1215 assert(info->sequence_ap.get());
1216 }
1217 line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
1218 state.address,
1219 state.line,
1220 state.column,
1221 state.file,
1222 state.is_stmt,
1223 state.basic_block,
1224 state.prologue_end,
1225 state.epilogue_begin,
1226 state.end_sequence);
1227 if (state.end_sequence)
1228 {
1229 // First, put the current sequence into the line table.
1230 line_table->InsertSequence(info->sequence_ap.get());
1231 // Then, empty it to prepare for the next sequence.
1232 info->sequence_ap->Clear();
1233 }
1234 }
1235 }
1236
1237 bool
ParseCompileUnitLineTable(const SymbolContext & sc)1238 SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
1239 {
1240 assert (sc.comp_unit);
1241 if (sc.comp_unit->GetLineTable() != NULL)
1242 return true;
1243
1244 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
1245 if (dwarf_cu)
1246 {
1247 const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
1248 if (dwarf_cu_die)
1249 {
1250 const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
1251 if (cu_line_offset != DW_INVALID_OFFSET)
1252 {
1253 std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
1254 if (line_table_ap.get())
1255 {
1256 ParseDWARFLineTableCallbackInfo info;
1257 info.line_table = line_table_ap.get();
1258 lldb::offset_t offset = cu_line_offset;
1259 DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
1260 if (m_debug_map_symfile)
1261 {
1262 // We have an object file that has a line table with addresses
1263 // that are not linked. We need to link the line table and convert
1264 // the addresses that are relative to the .o file into addresses
1265 // for the main executable.
1266 sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
1267 }
1268 else
1269 {
1270 sc.comp_unit->SetLineTable(line_table_ap.release());
1271 return true;
1272 }
1273 }
1274 }
1275 }
1276 }
1277 return false;
1278 }
1279
1280 size_t
ParseFunctionBlocks(const SymbolContext & sc,Block * parent_block,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,addr_t subprogram_low_pc,uint32_t depth)1281 SymbolFileDWARF::ParseFunctionBlocks
1282 (
1283 const SymbolContext& sc,
1284 Block *parent_block,
1285 DWARFCompileUnit* dwarf_cu,
1286 const DWARFDebugInfoEntry *die,
1287 addr_t subprogram_low_pc,
1288 uint32_t depth
1289 )
1290 {
1291 size_t blocks_added = 0;
1292 while (die != NULL)
1293 {
1294 dw_tag_t tag = die->Tag();
1295
1296 switch (tag)
1297 {
1298 case DW_TAG_inlined_subroutine:
1299 case DW_TAG_subprogram:
1300 case DW_TAG_lexical_block:
1301 {
1302 Block *block = NULL;
1303 if (tag == DW_TAG_subprogram)
1304 {
1305 // Skip any DW_TAG_subprogram DIEs that are inside
1306 // of a normal or inlined functions. These will be
1307 // parsed on their own as separate entities.
1308
1309 if (depth > 0)
1310 break;
1311
1312 block = parent_block;
1313 }
1314 else
1315 {
1316 BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
1317 parent_block->AddChild(block_sp);
1318 block = block_sp.get();
1319 }
1320 DWARFDebugRanges::RangeList ranges;
1321 const char *name = NULL;
1322 const char *mangled_name = NULL;
1323
1324 int decl_file = 0;
1325 int decl_line = 0;
1326 int decl_column = 0;
1327 int call_file = 0;
1328 int call_line = 0;
1329 int call_column = 0;
1330 if (die->GetDIENamesAndRanges (this,
1331 dwarf_cu,
1332 name,
1333 mangled_name,
1334 ranges,
1335 decl_file, decl_line, decl_column,
1336 call_file, call_line, call_column))
1337 {
1338 if (tag == DW_TAG_subprogram)
1339 {
1340 assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
1341 subprogram_low_pc = ranges.GetMinRangeBase(0);
1342 }
1343 else if (tag == DW_TAG_inlined_subroutine)
1344 {
1345 // We get called here for inlined subroutines in two ways.
1346 // The first time is when we are making the Function object
1347 // for this inlined concrete instance. Since we're creating a top level block at
1348 // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS. So we need to
1349 // adjust the containing address.
1350 // The second time is when we are parsing the blocks inside the function that contains
1351 // the inlined concrete instance. Since these will be blocks inside the containing "real"
1352 // function the offset will be for that function.
1353 if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
1354 {
1355 subprogram_low_pc = ranges.GetMinRangeBase(0);
1356 }
1357 }
1358
1359 AddRangesToBlock (*block, ranges, subprogram_low_pc);
1360
1361 if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
1362 {
1363 std::unique_ptr<Declaration> decl_ap;
1364 if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1365 decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
1366 decl_line, decl_column));
1367
1368 std::unique_ptr<Declaration> call_ap;
1369 if (call_file != 0 || call_line != 0 || call_column != 0)
1370 call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
1371 call_line, call_column));
1372
1373 block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
1374 }
1375
1376 ++blocks_added;
1377
1378 if (die->HasChildren())
1379 {
1380 blocks_added += ParseFunctionBlocks (sc,
1381 block,
1382 dwarf_cu,
1383 die->GetFirstChild(),
1384 subprogram_low_pc,
1385 depth + 1);
1386 }
1387 }
1388 }
1389 break;
1390 default:
1391 break;
1392 }
1393
1394 // Only parse siblings of the block if we are not at depth zero. A depth
1395 // of zero indicates we are currently parsing the top level
1396 // DW_TAG_subprogram DIE
1397
1398 if (depth == 0)
1399 die = NULL;
1400 else
1401 die = die->GetSibling();
1402 }
1403 return blocks_added;
1404 }
1405
1406 bool
ParseTemplateDIE(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,ClangASTContext::TemplateParameterInfos & template_param_infos)1407 SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
1408 const DWARFDebugInfoEntry *die,
1409 ClangASTContext::TemplateParameterInfos &template_param_infos)
1410 {
1411 const dw_tag_t tag = die->Tag();
1412
1413 switch (tag)
1414 {
1415 case DW_TAG_template_type_parameter:
1416 case DW_TAG_template_value_parameter:
1417 {
1418 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1419
1420 DWARFDebugInfoEntry::Attributes attributes;
1421 const size_t num_attributes = die->GetAttributes (this,
1422 dwarf_cu,
1423 fixed_form_sizes,
1424 attributes);
1425 const char *name = NULL;
1426 Type *lldb_type = NULL;
1427 ClangASTType clang_type;
1428 uint64_t uval64 = 0;
1429 bool uval64_valid = false;
1430 if (num_attributes > 0)
1431 {
1432 DWARFFormValue form_value;
1433 for (size_t i=0; i<num_attributes; ++i)
1434 {
1435 const dw_attr_t attr = attributes.AttributeAtIndex(i);
1436
1437 switch (attr)
1438 {
1439 case DW_AT_name:
1440 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1441 name = form_value.AsCString(&get_debug_str_data());
1442 break;
1443
1444 case DW_AT_type:
1445 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1446 {
1447 const dw_offset_t type_die_offset = form_value.Reference(dwarf_cu);
1448 lldb_type = ResolveTypeUID(type_die_offset);
1449 if (lldb_type)
1450 clang_type = lldb_type->GetClangForwardType();
1451 }
1452 break;
1453
1454 case DW_AT_const_value:
1455 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1456 {
1457 uval64_valid = true;
1458 uval64 = form_value.Unsigned();
1459 }
1460 break;
1461 default:
1462 break;
1463 }
1464 }
1465
1466 clang::ASTContext *ast = GetClangASTContext().getASTContext();
1467 if (!clang_type)
1468 clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
1469
1470 if (clang_type)
1471 {
1472 bool is_signed = false;
1473 if (name && name[0])
1474 template_param_infos.names.push_back(name);
1475 else
1476 template_param_infos.names.push_back(NULL);
1477
1478 if (tag == DW_TAG_template_value_parameter &&
1479 lldb_type != NULL &&
1480 clang_type.IsIntegerType (is_signed) &&
1481 uval64_valid)
1482 {
1483 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
1484 template_param_infos.args.push_back (clang::TemplateArgument (*ast,
1485 llvm::APSInt(apint),
1486 clang_type.GetQualType()));
1487 }
1488 else
1489 {
1490 template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
1491 }
1492 }
1493 else
1494 {
1495 return false;
1496 }
1497
1498 }
1499 }
1500 return true;
1501
1502 default:
1503 break;
1504 }
1505 return false;
1506 }
1507
1508 bool
ParseTemplateParameterInfos(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die,ClangASTContext::TemplateParameterInfos & template_param_infos)1509 SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
1510 const DWARFDebugInfoEntry *parent_die,
1511 ClangASTContext::TemplateParameterInfos &template_param_infos)
1512 {
1513
1514 if (parent_die == NULL)
1515 return false;
1516
1517 Args template_parameter_names;
1518 for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
1519 die != NULL;
1520 die = die->GetSibling())
1521 {
1522 const dw_tag_t tag = die->Tag();
1523
1524 switch (tag)
1525 {
1526 case DW_TAG_template_type_parameter:
1527 case DW_TAG_template_value_parameter:
1528 ParseTemplateDIE (dwarf_cu, die, template_param_infos);
1529 break;
1530
1531 default:
1532 break;
1533 }
1534 }
1535 if (template_param_infos.args.empty())
1536 return false;
1537 return template_param_infos.args.size() == template_param_infos.names.size();
1538 }
1539
1540 clang::ClassTemplateDecl *
ParseClassTemplateDecl(clang::DeclContext * decl_ctx,lldb::AccessType access_type,const char * parent_name,int tag_decl_kind,const ClangASTContext::TemplateParameterInfos & template_param_infos)1541 SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
1542 lldb::AccessType access_type,
1543 const char *parent_name,
1544 int tag_decl_kind,
1545 const ClangASTContext::TemplateParameterInfos &template_param_infos)
1546 {
1547 if (template_param_infos.IsValid())
1548 {
1549 std::string template_basename(parent_name);
1550 template_basename.erase (template_basename.find('<'));
1551 ClangASTContext &ast = GetClangASTContext();
1552
1553 return ast.CreateClassTemplateDecl (decl_ctx,
1554 access_type,
1555 template_basename.c_str(),
1556 tag_decl_kind,
1557 template_param_infos);
1558 }
1559 return NULL;
1560 }
1561
1562 class SymbolFileDWARF::DelayedAddObjCClassProperty
1563 {
1564 public:
DelayedAddObjCClassProperty(const ClangASTType & class_opaque_type,const char * property_name,const ClangASTType & property_opaque_type,clang::ObjCIvarDecl * ivar_decl,const char * property_setter_name,const char * property_getter_name,uint32_t property_attributes,const ClangASTMetadata * metadata)1565 DelayedAddObjCClassProperty
1566 (
1567 const ClangASTType &class_opaque_type,
1568 const char *property_name,
1569 const ClangASTType &property_opaque_type, // The property type is only required if you don't have an ivar decl
1570 clang::ObjCIvarDecl *ivar_decl,
1571 const char *property_setter_name,
1572 const char *property_getter_name,
1573 uint32_t property_attributes,
1574 const ClangASTMetadata *metadata
1575 ) :
1576 m_class_opaque_type (class_opaque_type),
1577 m_property_name (property_name),
1578 m_property_opaque_type (property_opaque_type),
1579 m_ivar_decl (ivar_decl),
1580 m_property_setter_name (property_setter_name),
1581 m_property_getter_name (property_getter_name),
1582 m_property_attributes (property_attributes)
1583 {
1584 if (metadata != NULL)
1585 {
1586 m_metadata_ap.reset(new ClangASTMetadata());
1587 *m_metadata_ap = *metadata;
1588 }
1589 }
1590
DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty & rhs)1591 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
1592 {
1593 *this = rhs;
1594 }
1595
operator =(const DelayedAddObjCClassProperty & rhs)1596 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
1597 {
1598 m_class_opaque_type = rhs.m_class_opaque_type;
1599 m_property_name = rhs.m_property_name;
1600 m_property_opaque_type = rhs.m_property_opaque_type;
1601 m_ivar_decl = rhs.m_ivar_decl;
1602 m_property_setter_name = rhs.m_property_setter_name;
1603 m_property_getter_name = rhs.m_property_getter_name;
1604 m_property_attributes = rhs.m_property_attributes;
1605
1606 if (rhs.m_metadata_ap.get())
1607 {
1608 m_metadata_ap.reset (new ClangASTMetadata());
1609 *m_metadata_ap = *rhs.m_metadata_ap;
1610 }
1611 return *this;
1612 }
1613
1614 bool
Finalize()1615 Finalize()
1616 {
1617 return m_class_opaque_type.AddObjCClassProperty (m_property_name,
1618 m_property_opaque_type,
1619 m_ivar_decl,
1620 m_property_setter_name,
1621 m_property_getter_name,
1622 m_property_attributes,
1623 m_metadata_ap.get());
1624 }
1625 private:
1626 ClangASTType m_class_opaque_type;
1627 const char *m_property_name;
1628 ClangASTType m_property_opaque_type;
1629 clang::ObjCIvarDecl *m_ivar_decl;
1630 const char *m_property_setter_name;
1631 const char *m_property_getter_name;
1632 uint32_t m_property_attributes;
1633 std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1634 };
1635
1636 struct BitfieldInfo
1637 {
1638 uint64_t bit_size;
1639 uint64_t bit_offset;
1640
BitfieldInfoBitfieldInfo1641 BitfieldInfo () :
1642 bit_size (LLDB_INVALID_ADDRESS),
1643 bit_offset (LLDB_INVALID_ADDRESS)
1644 {
1645 }
1646
1647 void
ClearBitfieldInfo1648 Clear()
1649 {
1650 bit_size = LLDB_INVALID_ADDRESS;
1651 bit_offset = LLDB_INVALID_ADDRESS;
1652 }
1653
IsValidBitfieldInfo1654 bool IsValid ()
1655 {
1656 return (bit_size != LLDB_INVALID_ADDRESS) &&
1657 (bit_offset != LLDB_INVALID_ADDRESS);
1658 }
1659 };
1660
1661
1662 bool
ClassOrStructIsVirtual(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die)1663 SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
1664 const DWARFDebugInfoEntry *parent_die)
1665 {
1666 if (parent_die)
1667 {
1668 for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1669 {
1670 dw_tag_t tag = die->Tag();
1671 bool check_virtuality = false;
1672 switch (tag)
1673 {
1674 case DW_TAG_inheritance:
1675 case DW_TAG_subprogram:
1676 check_virtuality = true;
1677 break;
1678 default:
1679 break;
1680 }
1681 if (check_virtuality)
1682 {
1683 if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
1684 return true;
1685 }
1686 }
1687 }
1688 return false;
1689 }
1690
1691 size_t
ParseChildMembers(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die,ClangASTType & class_clang_type,const LanguageType class_language,std::vector<clang::CXXBaseSpecifier * > & base_classes,std::vector<int> & member_accessibilities,DWARFDIECollection & member_function_dies,DelayedPropertyList & delayed_properties,AccessType & default_accessibility,bool & is_a_class,LayoutInfo & layout_info)1692 SymbolFileDWARF::ParseChildMembers
1693 (
1694 const SymbolContext& sc,
1695 DWARFCompileUnit* dwarf_cu,
1696 const DWARFDebugInfoEntry *parent_die,
1697 ClangASTType &class_clang_type,
1698 const LanguageType class_language,
1699 std::vector<clang::CXXBaseSpecifier *>& base_classes,
1700 std::vector<int>& member_accessibilities,
1701 DWARFDIECollection& member_function_dies,
1702 DelayedPropertyList& delayed_properties,
1703 AccessType& default_accessibility,
1704 bool &is_a_class,
1705 LayoutInfo &layout_info
1706 )
1707 {
1708 if (parent_die == NULL)
1709 return 0;
1710
1711 size_t count = 0;
1712 const DWARFDebugInfoEntry *die;
1713 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
1714 uint32_t member_idx = 0;
1715 BitfieldInfo last_field_info;
1716 ModuleSP module = GetObjectFile()->GetModule();
1717
1718 for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
1719 {
1720 dw_tag_t tag = die->Tag();
1721
1722 switch (tag)
1723 {
1724 case DW_TAG_member:
1725 case DW_TAG_APPLE_property:
1726 {
1727 DWARFDebugInfoEntry::Attributes attributes;
1728 const size_t num_attributes = die->GetAttributes (this,
1729 dwarf_cu,
1730 fixed_form_sizes,
1731 attributes);
1732 if (num_attributes > 0)
1733 {
1734 Declaration decl;
1735 //DWARFExpression location;
1736 const char *name = NULL;
1737 const char *prop_name = NULL;
1738 const char *prop_getter_name = NULL;
1739 const char *prop_setter_name = NULL;
1740 uint32_t prop_attributes = 0;
1741
1742
1743 bool is_artificial = false;
1744 lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
1745 AccessType accessibility = eAccessNone;
1746 uint32_t member_byte_offset = UINT32_MAX;
1747 size_t byte_size = 0;
1748 size_t bit_offset = 0;
1749 size_t bit_size = 0;
1750 bool is_external = false; // On DW_TAG_members, this means the member is static
1751 uint32_t i;
1752 for (i=0; i<num_attributes && !is_artificial; ++i)
1753 {
1754 const dw_attr_t attr = attributes.AttributeAtIndex(i);
1755 DWARFFormValue form_value;
1756 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
1757 {
1758 switch (attr)
1759 {
1760 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
1761 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
1762 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
1763 case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
1764 case DW_AT_type: encoding_uid = form_value.Reference(dwarf_cu); break;
1765 case DW_AT_bit_offset: bit_offset = form_value.Unsigned(); break;
1766 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break;
1767 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
1768 case DW_AT_data_member_location:
1769 if (form_value.BlockData())
1770 {
1771 Value initialValue(0);
1772 Value memberOffset(0);
1773 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
1774 uint32_t block_length = form_value.Unsigned();
1775 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
1776 if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
1777 NULL, // ClangExpressionVariableList *
1778 NULL, // ClangExpressionDeclMap *
1779 NULL, // RegisterContext *
1780 module,
1781 debug_info_data,
1782 block_offset,
1783 block_length,
1784 eRegisterKindDWARF,
1785 &initialValue,
1786 memberOffset,
1787 NULL))
1788 {
1789 member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
1790 }
1791 }
1792 else
1793 {
1794 // With DWARF 3 and later, if the value is an integer constant,
1795 // this form value is the offset in bytes from the beginning
1796 // of the containing entity.
1797 member_byte_offset = form_value.Unsigned();
1798 }
1799 break;
1800
1801 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
1802 case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
1803 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(&get_debug_str_data()); break;
1804 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
1805 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
1806 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
1807 case DW_AT_external: is_external = form_value.Boolean(); break;
1808
1809 default:
1810 case DW_AT_declaration:
1811 case DW_AT_description:
1812 case DW_AT_mutable:
1813 case DW_AT_visibility:
1814 case DW_AT_sibling:
1815 break;
1816 }
1817 }
1818 }
1819
1820 if (prop_name)
1821 {
1822 ConstString fixed_getter;
1823 ConstString fixed_setter;
1824
1825 // Check if the property getter/setter were provided as full
1826 // names. We want basenames, so we extract them.
1827
1828 if (prop_getter_name && prop_getter_name[0] == '-')
1829 {
1830 ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
1831 prop_getter_name = prop_getter_method.GetSelector().GetCString();
1832 }
1833
1834 if (prop_setter_name && prop_setter_name[0] == '-')
1835 {
1836 ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
1837 prop_setter_name = prop_setter_method.GetSelector().GetCString();
1838 }
1839
1840 // If the names haven't been provided, they need to be
1841 // filled in.
1842
1843 if (!prop_getter_name)
1844 {
1845 prop_getter_name = prop_name;
1846 }
1847 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
1848 {
1849 StreamString ss;
1850
1851 ss.Printf("set%c%s:",
1852 toupper(prop_name[0]),
1853 &prop_name[1]);
1854
1855 fixed_setter.SetCString(ss.GetData());
1856 prop_setter_name = fixed_setter.GetCString();
1857 }
1858 }
1859
1860 // Clang has a DWARF generation bug where sometimes it
1861 // represents fields that are references with bad byte size
1862 // and bit size/offset information such as:
1863 //
1864 // DW_AT_byte_size( 0x00 )
1865 // DW_AT_bit_size( 0x40 )
1866 // DW_AT_bit_offset( 0xffffffffffffffc0 )
1867 //
1868 // So check the bit offset to make sure it is sane, and if
1869 // the values are not sane, remove them. If we don't do this
1870 // then we will end up with a crash if we try to use this
1871 // type in an expression when clang becomes unhappy with its
1872 // recycled debug info.
1873
1874 if (bit_offset > 128)
1875 {
1876 bit_size = 0;
1877 bit_offset = 0;
1878 }
1879
1880 // FIXME: Make Clang ignore Objective-C accessibility for expressions
1881 if (class_language == eLanguageTypeObjC ||
1882 class_language == eLanguageTypeObjC_plus_plus)
1883 accessibility = eAccessNone;
1884
1885 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
1886 {
1887 // Not all compilers will mark the vtable pointer
1888 // member as artificial (llvm-gcc). We can't have
1889 // the virtual members in our classes otherwise it
1890 // throws off all child offsets since we end up
1891 // having and extra pointer sized member in our
1892 // class layouts.
1893 is_artificial = true;
1894 }
1895
1896 // Handle static members
1897 if (is_external && member_byte_offset == UINT32_MAX)
1898 {
1899 Type *var_type = ResolveTypeUID(encoding_uid);
1900
1901 if (var_type)
1902 {
1903 if (accessibility == eAccessNone)
1904 accessibility = eAccessPublic;
1905 class_clang_type.AddVariableToRecordType (name,
1906 var_type->GetClangLayoutType(),
1907 accessibility);
1908 }
1909 break;
1910 }
1911
1912 if (is_artificial == false)
1913 {
1914 Type *member_type = ResolveTypeUID(encoding_uid);
1915
1916 clang::FieldDecl *field_decl = NULL;
1917 if (tag == DW_TAG_member)
1918 {
1919 if (member_type)
1920 {
1921 if (accessibility == eAccessNone)
1922 accessibility = default_accessibility;
1923 member_accessibilities.push_back(accessibility);
1924
1925 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
1926 if (bit_size > 0)
1927 {
1928
1929 BitfieldInfo this_field_info;
1930 this_field_info.bit_offset = field_bit_offset;
1931 this_field_info.bit_size = bit_size;
1932
1933 /////////////////////////////////////////////////////////////
1934 // How to locate a field given the DWARF debug information
1935 //
1936 // AT_byte_size indicates the size of the word in which the
1937 // bit offset must be interpreted.
1938 //
1939 // AT_data_member_location indicates the byte offset of the
1940 // word from the base address of the structure.
1941 //
1942 // AT_bit_offset indicates how many bits into the word
1943 // (according to the host endianness) the low-order bit of
1944 // the field starts. AT_bit_offset can be negative.
1945 //
1946 // AT_bit_size indicates the size of the field in bits.
1947 /////////////////////////////////////////////////////////////
1948
1949 if (byte_size == 0)
1950 byte_size = member_type->GetByteSize();
1951
1952 if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
1953 {
1954 this_field_info.bit_offset += byte_size * 8;
1955 this_field_info.bit_offset -= (bit_offset + bit_size);
1956 }
1957 else
1958 {
1959 this_field_info.bit_offset += bit_offset;
1960 }
1961
1962 // Update the field bit offset we will report for layout
1963 field_bit_offset = this_field_info.bit_offset;
1964
1965 // If the member to be emitted did not start on a character boundary and there is
1966 // empty space between the last field and this one, then we need to emit an
1967 // anonymous member filling up the space up to its start. There are three cases
1968 // here:
1969 //
1970 // 1 If the previous member ended on a character boundary, then we can emit an
1971 // anonymous member starting at the most recent character boundary.
1972 //
1973 // 2 If the previous member did not end on a character boundary and the distance
1974 // from the end of the previous member to the current member is less than a
1975 // word width, then we can emit an anonymous member starting right after the
1976 // previous member and right before this member.
1977 //
1978 // 3 If the previous member did not end on a character boundary and the distance
1979 // from the end of the previous member to the current member is greater than
1980 // or equal a word width, then we act as in Case 1.
1981
1982 const uint64_t character_width = 8;
1983 const uint64_t word_width = 32;
1984
1985 // Objective-C has invalid DW_AT_bit_offset values in older versions
1986 // of clang, so we have to be careful and only insert unnammed bitfields
1987 // if we have a new enough clang.
1988 bool detect_unnamed_bitfields = true;
1989
1990 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
1991 detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
1992
1993 if (detect_unnamed_bitfields)
1994 {
1995 BitfieldInfo anon_field_info;
1996
1997 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
1998 {
1999 uint64_t last_field_end = 0;
2000
2001 if (last_field_info.IsValid())
2002 last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
2003
2004 if (this_field_info.bit_offset != last_field_end)
2005 {
2006 if (((last_field_end % character_width) == 0) || // case 1
2007 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3
2008 {
2009 anon_field_info.bit_size = this_field_info.bit_offset % character_width;
2010 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
2011 }
2012 else // case 2
2013 {
2014 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
2015 anon_field_info.bit_offset = last_field_end;
2016 }
2017 }
2018 }
2019
2020 if (anon_field_info.IsValid())
2021 {
2022 clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
2023 GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
2024 accessibility,
2025 anon_field_info.bit_size);
2026
2027 layout_info.field_offsets.insert(std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
2028 }
2029 }
2030 last_field_info = this_field_info;
2031 }
2032 else
2033 {
2034 last_field_info.Clear();
2035 }
2036
2037 ClangASTType member_clang_type = member_type->GetClangLayoutType();
2038
2039 {
2040 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
2041 // If the current field is at the end of the structure, then there is definitely no room for extra
2042 // elements and we override the type to array[0].
2043
2044 ClangASTType member_array_element_type;
2045 uint64_t member_array_size;
2046 bool member_array_is_incomplete;
2047
2048 if (member_clang_type.IsArrayType(&member_array_element_type,
2049 &member_array_size,
2050 &member_array_is_incomplete) &&
2051 !member_array_is_incomplete)
2052 {
2053 uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
2054
2055 if (member_byte_offset >= parent_byte_size)
2056 {
2057 if (member_array_size != 1)
2058 {
2059 GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64,
2060 MakeUserID(die->GetOffset()),
2061 name,
2062 encoding_uid,
2063 MakeUserID(parent_die->GetOffset()));
2064 }
2065
2066 member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
2067 }
2068 }
2069 }
2070
2071 field_decl = class_clang_type.AddFieldToRecordType (name,
2072 member_clang_type,
2073 accessibility,
2074 bit_size);
2075
2076 GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
2077
2078 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
2079
2080 }
2081 else
2082 {
2083 if (name)
2084 GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2085 MakeUserID(die->GetOffset()),
2086 name,
2087 encoding_uid);
2088 else
2089 GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
2090 MakeUserID(die->GetOffset()),
2091 encoding_uid);
2092 }
2093 }
2094
2095 if (prop_name != NULL)
2096 {
2097 clang::ObjCIvarDecl *ivar_decl = NULL;
2098
2099 if (field_decl)
2100 {
2101 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
2102 assert (ivar_decl != NULL);
2103 }
2104
2105 ClangASTMetadata metadata;
2106 metadata.SetUserID (MakeUserID(die->GetOffset()));
2107 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
2108 prop_name,
2109 member_type->GetClangLayoutType(),
2110 ivar_decl,
2111 prop_setter_name,
2112 prop_getter_name,
2113 prop_attributes,
2114 &metadata));
2115
2116 if (ivar_decl)
2117 GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
2118 }
2119 }
2120 }
2121 ++member_idx;
2122 }
2123 break;
2124
2125 case DW_TAG_subprogram:
2126 // Let the type parsing code handle this one for us.
2127 member_function_dies.Append (die);
2128 break;
2129
2130 case DW_TAG_inheritance:
2131 {
2132 is_a_class = true;
2133 if (default_accessibility == eAccessNone)
2134 default_accessibility = eAccessPrivate;
2135 // TODO: implement DW_TAG_inheritance type parsing
2136 DWARFDebugInfoEntry::Attributes attributes;
2137 const size_t num_attributes = die->GetAttributes (this,
2138 dwarf_cu,
2139 fixed_form_sizes,
2140 attributes);
2141 if (num_attributes > 0)
2142 {
2143 Declaration decl;
2144 DWARFExpression location;
2145 lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
2146 AccessType accessibility = default_accessibility;
2147 bool is_virtual = false;
2148 bool is_base_of_class = true;
2149 off_t member_byte_offset = 0;
2150 uint32_t i;
2151 for (i=0; i<num_attributes; ++i)
2152 {
2153 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2154 DWARFFormValue form_value;
2155 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
2156 {
2157 switch (attr)
2158 {
2159 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
2160 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
2161 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
2162 case DW_AT_type: encoding_uid = form_value.Reference(dwarf_cu); break;
2163 case DW_AT_data_member_location:
2164 if (form_value.BlockData())
2165 {
2166 Value initialValue(0);
2167 Value memberOffset(0);
2168 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
2169 uint32_t block_length = form_value.Unsigned();
2170 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
2171 if (DWARFExpression::Evaluate (NULL,
2172 NULL,
2173 NULL,
2174 NULL,
2175 module,
2176 debug_info_data,
2177 block_offset,
2178 block_length,
2179 eRegisterKindDWARF,
2180 &initialValue,
2181 memberOffset,
2182 NULL))
2183 {
2184 member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
2185 }
2186 }
2187 else
2188 {
2189 // With DWARF 3 and later, if the value is an integer constant,
2190 // this form value is the offset in bytes from the beginning
2191 // of the containing entity.
2192 member_byte_offset = form_value.Unsigned();
2193 }
2194 break;
2195
2196 case DW_AT_accessibility:
2197 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2198 break;
2199
2200 case DW_AT_virtuality:
2201 is_virtual = form_value.Boolean();
2202 break;
2203
2204 case DW_AT_sibling:
2205 break;
2206
2207 default:
2208 break;
2209 }
2210 }
2211 }
2212
2213 Type *base_class_type = ResolveTypeUID(encoding_uid);
2214 assert(base_class_type);
2215
2216 ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
2217 assert (base_class_clang_type);
2218 if (class_language == eLanguageTypeObjC)
2219 {
2220 class_clang_type.SetObjCSuperClass(base_class_clang_type);
2221 }
2222 else
2223 {
2224 base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
2225 is_virtual,
2226 is_base_of_class));
2227
2228 if (is_virtual)
2229 {
2230 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
2231 // give us a constant offset, but gives us a DWARF expressions that requires an actual object
2232 // in memory. the DW_AT_data_member_location for a virtual base class looks like:
2233 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
2234 // Given this, there is really no valid response we can give to clang for virtual base
2235 // class offsets, and this should eventually be removed from LayoutRecordType() in the external
2236 // AST source in clang.
2237 }
2238 else
2239 {
2240 layout_info.base_offsets.insert(std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
2241 clang::CharUnits::fromQuantity(member_byte_offset)));
2242 }
2243 }
2244 }
2245 }
2246 break;
2247
2248 default:
2249 break;
2250 }
2251 }
2252
2253 return count;
2254 }
2255
2256
2257 clang::DeclContext*
GetClangDeclContextContainingTypeUID(lldb::user_id_t type_uid)2258 SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
2259 {
2260 DWARFDebugInfo* debug_info = DebugInfo();
2261 if (debug_info && UserIDMatches(type_uid))
2262 {
2263 DWARFCompileUnitSP cu_sp;
2264 const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2265 if (die)
2266 return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
2267 }
2268 return NULL;
2269 }
2270
2271 clang::DeclContext*
GetClangDeclContextForTypeUID(const lldb_private::SymbolContext & sc,lldb::user_id_t type_uid)2272 SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
2273 {
2274 if (UserIDMatches(type_uid))
2275 return GetClangDeclContextForDIEOffset (sc, type_uid);
2276 return NULL;
2277 }
2278
2279 Type*
ResolveTypeUID(lldb::user_id_t type_uid)2280 SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
2281 {
2282 if (UserIDMatches(type_uid))
2283 {
2284 DWARFDebugInfo* debug_info = DebugInfo();
2285 if (debug_info)
2286 {
2287 DWARFCompileUnitSP cu_sp;
2288 const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
2289 const bool assert_not_being_parsed = true;
2290 return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
2291 }
2292 }
2293 return NULL;
2294 }
2295
2296 Type*
ResolveTypeUID(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die,bool assert_not_being_parsed)2297 SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
2298 {
2299 if (die != NULL)
2300 {
2301 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
2302 if (log)
2303 GetObjectFile()->GetModule()->LogMessage (log,
2304 "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
2305 die->GetOffset(),
2306 DW_TAG_value_to_name(die->Tag()),
2307 die->GetName(this, cu));
2308
2309 // We might be coming in in the middle of a type tree (a class
2310 // withing a class, an enum within a class), so parse any needed
2311 // parent DIEs before we get to this one...
2312 const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
2313 switch (decl_ctx_die->Tag())
2314 {
2315 case DW_TAG_structure_type:
2316 case DW_TAG_union_type:
2317 case DW_TAG_class_type:
2318 {
2319 // Get the type, which could be a forward declaration
2320 if (log)
2321 GetObjectFile()->GetModule()->LogMessage (log,
2322 "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
2323 die->GetOffset(),
2324 DW_TAG_value_to_name(die->Tag()),
2325 die->GetName(this, cu),
2326 decl_ctx_die->GetOffset());
2327 //
2328 // Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
2329 // if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
2330 // {
2331 // if (log)
2332 // GetObjectFile()->GetModule()->LogMessage (log,
2333 // "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
2334 // die->GetOffset(),
2335 // DW_TAG_value_to_name(die->Tag()),
2336 // die->GetName(this, cu),
2337 // decl_ctx_die->GetOffset());
2338 // // Ask the type to complete itself if it already hasn't since if we
2339 // // want a function (method or static) from a class, the class must
2340 // // create itself and add it's own methods and class functions.
2341 // if (parent_type)
2342 // parent_type->GetClangFullType();
2343 // }
2344 }
2345 break;
2346
2347 default:
2348 break;
2349 }
2350 return ResolveType (cu, die);
2351 }
2352 return NULL;
2353 }
2354
2355 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
2356 // SymbolFileDWARF objects to detect if this DWARF file is the one that
2357 // can resolve a clang_type.
2358 bool
HasForwardDeclForClangType(const ClangASTType & clang_type)2359 SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
2360 {
2361 ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2362 const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2363 return die != NULL;
2364 }
2365
2366
2367 bool
ResolveClangOpaqueTypeDefinition(ClangASTType & clang_type)2368 SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
2369 {
2370 // We have a struct/union/class/enum that needs to be fully resolved.
2371 ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
2372 const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
2373 if (die == NULL)
2374 {
2375 // We have already resolved this type...
2376 return true;
2377 }
2378 // Once we start resolving this type, remove it from the forward declaration
2379 // map in case anyone child members or other types require this type to get resolved.
2380 // The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
2381 // are done.
2382 m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
2383
2384
2385 // Disable external storage for this type so we don't get anymore
2386 // clang::ExternalASTSource queries for this type.
2387 clang_type.SetHasExternalStorage (false);
2388
2389 DWARFDebugInfo* debug_info = DebugInfo();
2390
2391 DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
2392 Type *type = m_die_to_type.lookup (die);
2393
2394 const dw_tag_t tag = die->Tag();
2395
2396 Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2397 if (log)
2398 {
2399 GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
2400 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
2401 MakeUserID(die->GetOffset()),
2402 DW_TAG_value_to_name(tag),
2403 type->GetName().AsCString());
2404
2405 }
2406 assert (clang_type);
2407 DWARFDebugInfoEntry::Attributes attributes;
2408
2409 switch (tag)
2410 {
2411 case DW_TAG_structure_type:
2412 case DW_TAG_union_type:
2413 case DW_TAG_class_type:
2414 {
2415 LayoutInfo layout_info;
2416
2417 {
2418 if (die->HasChildren())
2419 {
2420
2421 LanguageType class_language = eLanguageTypeUnknown;
2422 if (clang_type.IsObjCObjectOrInterfaceType())
2423 {
2424 class_language = eLanguageTypeObjC;
2425 // For objective C we don't start the definition when
2426 // the class is created.
2427 clang_type.StartTagDeclarationDefinition ();
2428 }
2429
2430 int tag_decl_kind = -1;
2431 AccessType default_accessibility = eAccessNone;
2432 if (tag == DW_TAG_structure_type)
2433 {
2434 tag_decl_kind = clang::TTK_Struct;
2435 default_accessibility = eAccessPublic;
2436 }
2437 else if (tag == DW_TAG_union_type)
2438 {
2439 tag_decl_kind = clang::TTK_Union;
2440 default_accessibility = eAccessPublic;
2441 }
2442 else if (tag == DW_TAG_class_type)
2443 {
2444 tag_decl_kind = clang::TTK_Class;
2445 default_accessibility = eAccessPrivate;
2446 }
2447
2448 SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2449 std::vector<clang::CXXBaseSpecifier *> base_classes;
2450 std::vector<int> member_accessibilities;
2451 bool is_a_class = false;
2452 // Parse members and base classes first
2453 DWARFDIECollection member_function_dies;
2454
2455 DelayedPropertyList delayed_properties;
2456 ParseChildMembers (sc,
2457 dwarf_cu,
2458 die,
2459 clang_type,
2460 class_language,
2461 base_classes,
2462 member_accessibilities,
2463 member_function_dies,
2464 delayed_properties,
2465 default_accessibility,
2466 is_a_class,
2467 layout_info);
2468
2469 // Now parse any methods if there were any...
2470 size_t num_functions = member_function_dies.Size();
2471 if (num_functions > 0)
2472 {
2473 for (size_t i=0; i<num_functions; ++i)
2474 {
2475 ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
2476 }
2477 }
2478
2479 if (class_language == eLanguageTypeObjC)
2480 {
2481 ConstString class_name (clang_type.GetTypeName());
2482 if (class_name)
2483 {
2484
2485 DIEArray method_die_offsets;
2486 if (m_using_apple_tables)
2487 {
2488 if (m_apple_objc_ap.get())
2489 m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
2490 }
2491 else
2492 {
2493 if (!m_indexed)
2494 Index ();
2495
2496 m_objc_class_selectors_index.Find (class_name, method_die_offsets);
2497 }
2498
2499 if (!method_die_offsets.empty())
2500 {
2501 DWARFDebugInfo* debug_info = DebugInfo();
2502
2503 DWARFCompileUnit* method_cu = NULL;
2504 const size_t num_matches = method_die_offsets.size();
2505 for (size_t i=0; i<num_matches; ++i)
2506 {
2507 const dw_offset_t die_offset = method_die_offsets[i];
2508 DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
2509
2510 if (method_die)
2511 ResolveType (method_cu, method_die);
2512 else
2513 {
2514 if (m_using_apple_tables)
2515 {
2516 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
2517 die_offset, class_name.GetCString());
2518 }
2519 }
2520 }
2521 }
2522
2523 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
2524 pi != pe;
2525 ++pi)
2526 pi->Finalize();
2527 }
2528 }
2529
2530 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2531 // need to tell the clang type it is actually a class.
2532 if (class_language != eLanguageTypeObjC)
2533 {
2534 if (is_a_class && tag_decl_kind != clang::TTK_Class)
2535 clang_type.SetTagTypeKind (clang::TTK_Class);
2536 }
2537
2538 // Since DW_TAG_structure_type gets used for both classes
2539 // and structures, we may need to set any DW_TAG_member
2540 // fields to have a "private" access if none was specified.
2541 // When we parsed the child members we tracked that actual
2542 // accessibility value for each DW_TAG_member in the
2543 // "member_accessibilities" array. If the value for the
2544 // member is zero, then it was set to the "default_accessibility"
2545 // which for structs was "public". Below we correct this
2546 // by setting any fields to "private" that weren't correctly
2547 // set.
2548 if (is_a_class && !member_accessibilities.empty())
2549 {
2550 // This is a class and all members that didn't have
2551 // their access specified are private.
2552 clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
2553 &member_accessibilities.front(),
2554 member_accessibilities.size());
2555 }
2556
2557 if (!base_classes.empty())
2558 {
2559 // Make sure all base classes refer to complete types and not
2560 // forward declarations. If we don't do this, clang will crash
2561 // with an assertion in the call to clang_type.SetBaseClassesForClassType()
2562 bool base_class_error = false;
2563 for (auto &base_class : base_classes)
2564 {
2565 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
2566 if (type_source_info)
2567 {
2568 ClangASTType base_class_type (GetClangASTContext().getASTContext(), type_source_info->getType());
2569 if (base_class_type.GetCompleteType() == false)
2570 {
2571 if (!base_class_error)
2572 {
2573 GetObjectFile()->GetModule()->ReportError ("DWARF DIE at 0x%8.8x for class '%s' has a base class '%s' that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
2574 die->GetOffset(),
2575 die->GetName(this, dwarf_cu),
2576 base_class_type.GetTypeName().GetCString(),
2577 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
2578 }
2579 // We have no choice other than to pretend that the base class
2580 // is complete. If we don't do this, clang will crash when we
2581 // call setBases() inside of "clang_type.SetBaseClassesForClassType()"
2582 // below. Since we provide layout assistance, all ivars in this
2583 // class and other classe will be fine, this is the best we can do
2584 // short of crashing.
2585 base_class_type.StartTagDeclarationDefinition ();
2586 base_class_type.CompleteTagDeclarationDefinition ();
2587 }
2588 }
2589 }
2590 clang_type.SetBaseClassesForClassType (&base_classes.front(),
2591 base_classes.size());
2592
2593 // Clang will copy each CXXBaseSpecifier in "base_classes"
2594 // so we have to free them all.
2595 ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
2596 base_classes.size());
2597 }
2598 }
2599 }
2600
2601 clang_type.BuildIndirectFields ();
2602 clang_type.CompleteTagDeclarationDefinition ();
2603
2604 if (!layout_info.field_offsets.empty() ||
2605 !layout_info.base_offsets.empty() ||
2606 !layout_info.vbase_offsets.empty() )
2607 {
2608 if (type)
2609 layout_info.bit_size = type->GetByteSize() * 8;
2610 if (layout_info.bit_size == 0)
2611 layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
2612
2613 clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
2614 if (record_decl)
2615 {
2616 if (log)
2617 {
2618 GetObjectFile()->GetModule()->LogMessage (log,
2619 "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2620 clang_type.GetOpaqueQualType(),
2621 record_decl,
2622 layout_info.bit_size,
2623 layout_info.alignment,
2624 (uint32_t)layout_info.field_offsets.size(),
2625 (uint32_t)layout_info.base_offsets.size(),
2626 (uint32_t)layout_info.vbase_offsets.size());
2627
2628 uint32_t idx;
2629 {
2630 llvm::DenseMap <const clang::FieldDecl *, uint64_t>::const_iterator pos, end = layout_info.field_offsets.end();
2631 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
2632 {
2633 GetObjectFile()->GetModule()->LogMessage (log,
2634 "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }",
2635 clang_type.GetOpaqueQualType(),
2636 idx,
2637 (uint32_t)pos->second,
2638 pos->first->getNameAsString().c_str());
2639 }
2640 }
2641
2642 {
2643 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, base_end = layout_info.base_offsets.end();
2644 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx)
2645 {
2646 GetObjectFile()->GetModule()->LogMessage (log,
2647 "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }",
2648 clang_type.GetOpaqueQualType(),
2649 idx,
2650 (uint32_t)base_pos->second.getQuantity(),
2651 base_pos->first->getNameAsString().c_str());
2652 }
2653 }
2654 {
2655 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, vbase_end = layout_info.vbase_offsets.end();
2656 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx)
2657 {
2658 GetObjectFile()->GetModule()->LogMessage (log,
2659 "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }",
2660 clang_type.GetOpaqueQualType(),
2661 idx,
2662 (uint32_t)vbase_pos->second.getQuantity(),
2663 vbase_pos->first->getNameAsString().c_str());
2664 }
2665 }
2666 }
2667 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
2668 }
2669 }
2670 }
2671
2672 return (bool)clang_type;
2673
2674 case DW_TAG_enumeration_type:
2675 clang_type.StartTagDeclarationDefinition ();
2676 if (die->HasChildren())
2677 {
2678 SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
2679 bool is_signed = false;
2680 clang_type.IsIntegerType(is_signed);
2681 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
2682 }
2683 clang_type.CompleteTagDeclarationDefinition ();
2684 return (bool)clang_type;
2685
2686 default:
2687 assert(false && "not a forward clang type decl!");
2688 break;
2689 }
2690 return false;
2691 }
2692
2693 Type*
ResolveType(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * type_die,bool assert_not_being_parsed)2694 SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
2695 {
2696 if (type_die != NULL)
2697 {
2698 Type *type = m_die_to_type.lookup (type_die);
2699
2700 if (type == NULL)
2701 type = GetTypeForDIE (dwarf_cu, type_die).get();
2702
2703 if (assert_not_being_parsed)
2704 {
2705 if (type != DIE_IS_BEING_PARSED)
2706 return type;
2707
2708 GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
2709 type_die->GetOffset(),
2710 DW_TAG_value_to_name(type_die->Tag()),
2711 type_die->GetName(this, dwarf_cu));
2712
2713 }
2714 else
2715 return type;
2716 }
2717 return NULL;
2718 }
2719
2720 CompileUnit*
GetCompUnitForDWARFCompUnit(DWARFCompileUnit * dwarf_cu,uint32_t cu_idx)2721 SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
2722 {
2723 // Check if the symbol vendor already knows about this compile unit?
2724 if (dwarf_cu->GetUserData() == NULL)
2725 {
2726 // The symbol vendor doesn't know about this compile unit, we
2727 // need to parse and add it to the symbol vendor object.
2728 return ParseCompileUnit(dwarf_cu, cu_idx).get();
2729 }
2730 return (CompileUnit*)dwarf_cu->GetUserData();
2731 }
2732
2733 bool
GetFunction(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * func_die,SymbolContext & sc)2734 SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
2735 {
2736 sc.Clear(false);
2737 // Check if the symbol vendor already knows about this compile unit?
2738 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
2739
2740 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
2741 if (sc.function == NULL)
2742 sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
2743
2744 if (sc.function)
2745 {
2746 sc.module_sp = sc.function->CalculateSymbolContextModule();
2747 return true;
2748 }
2749
2750 return false;
2751 }
2752
2753 uint32_t
ResolveSymbolContext(const Address & so_addr,uint32_t resolve_scope,SymbolContext & sc)2754 SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
2755 {
2756 Timer scoped_timer(__PRETTY_FUNCTION__,
2757 "SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
2758 so_addr.GetSection().get(),
2759 so_addr.GetOffset(),
2760 resolve_scope);
2761 uint32_t resolved = 0;
2762 if (resolve_scope & ( eSymbolContextCompUnit |
2763 eSymbolContextFunction |
2764 eSymbolContextBlock |
2765 eSymbolContextLineEntry))
2766 {
2767 lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
2768
2769 DWARFDebugInfo* debug_info = DebugInfo();
2770 if (debug_info)
2771 {
2772 const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
2773 if (cu_offset != DW_INVALID_OFFSET)
2774 {
2775 uint32_t cu_idx = DW_INVALID_INDEX;
2776 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
2777 if (dwarf_cu)
2778 {
2779 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2780 if (sc.comp_unit)
2781 {
2782 resolved |= eSymbolContextCompUnit;
2783
2784 bool force_check_line_table = false;
2785 if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2786 {
2787 DWARFDebugInfoEntry *function_die = NULL;
2788 DWARFDebugInfoEntry *block_die = NULL;
2789 if (resolve_scope & eSymbolContextBlock)
2790 {
2791 dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
2792 }
2793 else
2794 {
2795 dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
2796 }
2797
2798 if (function_die != NULL)
2799 {
2800 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2801 if (sc.function == NULL)
2802 sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2803 }
2804 else
2805 {
2806 // We might have had a compile unit that had discontiguous
2807 // address ranges where the gaps are symbols that don't have
2808 // any debug info. Discontiguous compile unit address ranges
2809 // should only happen when there aren't other functions from
2810 // other compile units in these gaps. This helps keep the size
2811 // of the aranges down.
2812 force_check_line_table = true;
2813 }
2814
2815 if (sc.function != NULL)
2816 {
2817 resolved |= eSymbolContextFunction;
2818
2819 if (resolve_scope & eSymbolContextBlock)
2820 {
2821 Block& block = sc.function->GetBlock (true);
2822
2823 if (block_die != NULL)
2824 sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2825 else
2826 sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2827 if (sc.block)
2828 resolved |= eSymbolContextBlock;
2829 }
2830 }
2831 }
2832
2833 if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
2834 {
2835 LineTable *line_table = sc.comp_unit->GetLineTable();
2836 if (line_table != NULL)
2837 {
2838 // And address that makes it into this function should be in terms
2839 // of this debug file if there is no debug map, or it will be an
2840 // address in the .o file which needs to be fixed up to be in terms
2841 // of the debug map executable. Either way, calling FixupAddress()
2842 // will work for us.
2843 Address exe_so_addr (so_addr);
2844 if (FixupAddress(exe_so_addr))
2845 {
2846 if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
2847 {
2848 resolved |= eSymbolContextLineEntry;
2849 }
2850 }
2851 }
2852 }
2853
2854 if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
2855 {
2856 // We might have had a compile unit that had discontiguous
2857 // address ranges where the gaps are symbols that don't have
2858 // any debug info. Discontiguous compile unit address ranges
2859 // should only happen when there aren't other functions from
2860 // other compile units in these gaps. This helps keep the size
2861 // of the aranges down.
2862 sc.comp_unit = NULL;
2863 resolved &= ~eSymbolContextCompUnit;
2864 }
2865 }
2866 else
2867 {
2868 GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
2869 cu_offset,
2870 cu_idx);
2871 }
2872 }
2873 }
2874 }
2875 }
2876 return resolved;
2877 }
2878
2879
2880
2881 uint32_t
ResolveSymbolContext(const FileSpec & file_spec,uint32_t line,bool check_inlines,uint32_t resolve_scope,SymbolContextList & sc_list)2882 SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
2883 {
2884 const uint32_t prev_size = sc_list.GetSize();
2885 if (resolve_scope & eSymbolContextCompUnit)
2886 {
2887 DWARFDebugInfo* debug_info = DebugInfo();
2888 if (debug_info)
2889 {
2890 uint32_t cu_idx;
2891 DWARFCompileUnit* dwarf_cu = NULL;
2892
2893 for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
2894 {
2895 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2896 const bool full_match = (bool)file_spec.GetDirectory();
2897 bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
2898 if (check_inlines || file_spec_matches_cu_file_spec)
2899 {
2900 SymbolContext sc (m_obj_file->GetModule());
2901 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
2902 if (sc.comp_unit)
2903 {
2904 uint32_t file_idx = UINT32_MAX;
2905
2906 // If we are looking for inline functions only and we don't
2907 // find it in the support files, we are done.
2908 if (check_inlines)
2909 {
2910 file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2911 if (file_idx == UINT32_MAX)
2912 continue;
2913 }
2914
2915 if (line != 0)
2916 {
2917 LineTable *line_table = sc.comp_unit->GetLineTable();
2918
2919 if (line_table != NULL && line != 0)
2920 {
2921 // We will have already looked up the file index if
2922 // we are searching for inline entries.
2923 if (!check_inlines)
2924 file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
2925
2926 if (file_idx != UINT32_MAX)
2927 {
2928 uint32_t found_line;
2929 uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
2930 found_line = sc.line_entry.line;
2931
2932 while (line_idx != UINT32_MAX)
2933 {
2934 sc.function = NULL;
2935 sc.block = NULL;
2936 if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
2937 {
2938 const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
2939 if (file_vm_addr != LLDB_INVALID_ADDRESS)
2940 {
2941 DWARFDebugInfoEntry *function_die = NULL;
2942 DWARFDebugInfoEntry *block_die = NULL;
2943 dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
2944
2945 if (function_die != NULL)
2946 {
2947 sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
2948 if (sc.function == NULL)
2949 sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
2950 }
2951
2952 if (sc.function != NULL)
2953 {
2954 Block& block = sc.function->GetBlock (true);
2955
2956 if (block_die != NULL)
2957 sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
2958 else
2959 sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
2960 }
2961 }
2962 }
2963
2964 sc_list.Append(sc);
2965 line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
2966 }
2967 }
2968 }
2969 else if (file_spec_matches_cu_file_spec && !check_inlines)
2970 {
2971 // only append the context if we aren't looking for inline call sites
2972 // by file and line and if the file spec matches that of the compile unit
2973 sc_list.Append(sc);
2974 }
2975 }
2976 else if (file_spec_matches_cu_file_spec && !check_inlines)
2977 {
2978 // only append the context if we aren't looking for inline call sites
2979 // by file and line and if the file spec matches that of the compile unit
2980 sc_list.Append(sc);
2981 }
2982
2983 if (!check_inlines)
2984 break;
2985 }
2986 }
2987 }
2988 }
2989 }
2990 return sc_list.GetSize() - prev_size;
2991 }
2992
2993 void
Index()2994 SymbolFileDWARF::Index ()
2995 {
2996 if (m_indexed)
2997 return;
2998 m_indexed = true;
2999 Timer scoped_timer (__PRETTY_FUNCTION__,
3000 "SymbolFileDWARF::Index (%s)",
3001 GetObjectFile()->GetFileSpec().GetFilename().AsCString());
3002
3003 DWARFDebugInfo* debug_info = DebugInfo();
3004 if (debug_info)
3005 {
3006 uint32_t cu_idx = 0;
3007 const uint32_t num_compile_units = GetNumCompileUnits();
3008 for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
3009 {
3010 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
3011
3012 bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
3013
3014 dwarf_cu->Index (cu_idx,
3015 m_function_basename_index,
3016 m_function_fullname_index,
3017 m_function_method_index,
3018 m_function_selector_index,
3019 m_objc_class_selectors_index,
3020 m_global_index,
3021 m_type_index,
3022 m_namespace_index);
3023
3024 // Keep memory down by clearing DIEs if this generate function
3025 // caused them to be parsed
3026 if (clear_dies)
3027 dwarf_cu->ClearDIEs (true);
3028 }
3029
3030 m_function_basename_index.Finalize();
3031 m_function_fullname_index.Finalize();
3032 m_function_method_index.Finalize();
3033 m_function_selector_index.Finalize();
3034 m_objc_class_selectors_index.Finalize();
3035 m_global_index.Finalize();
3036 m_type_index.Finalize();
3037 m_namespace_index.Finalize();
3038
3039 #if defined (ENABLE_DEBUG_PRINTF)
3040 StreamFile s(stdout, false);
3041 s.Printf ("DWARF index for '%s':",
3042 GetObjectFile()->GetFileSpec().GetPath().c_str());
3043 s.Printf("\nFunction basenames:\n"); m_function_basename_index.Dump (&s);
3044 s.Printf("\nFunction fullnames:\n"); m_function_fullname_index.Dump (&s);
3045 s.Printf("\nFunction methods:\n"); m_function_method_index.Dump (&s);
3046 s.Printf("\nFunction selectors:\n"); m_function_selector_index.Dump (&s);
3047 s.Printf("\nObjective C class selectors:\n"); m_objc_class_selectors_index.Dump (&s);
3048 s.Printf("\nGlobals and statics:\n"); m_global_index.Dump (&s);
3049 s.Printf("\nTypes:\n"); m_type_index.Dump (&s);
3050 s.Printf("\nNamepaces:\n"); m_namespace_index.Dump (&s);
3051 #endif
3052 }
3053 }
3054
3055 bool
NamespaceDeclMatchesThisSymbolFile(const ClangNamespaceDecl * namespace_decl)3056 SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
3057 {
3058 if (namespace_decl == NULL)
3059 {
3060 // Invalid namespace decl which means we aren't matching only things
3061 // in this symbol file, so return true to indicate it matches this
3062 // symbol file.
3063 return true;
3064 }
3065
3066 clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
3067
3068 if (namespace_ast == NULL)
3069 return true; // No AST in the "namespace_decl", return true since it
3070 // could then match any symbol file, including this one
3071
3072 if (namespace_ast == GetClangASTContext().getASTContext())
3073 return true; // The ASTs match, return true
3074
3075 // The namespace AST was valid, and it does not match...
3076 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3077
3078 if (log)
3079 GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
3080
3081 return false;
3082 }
3083
3084 bool
DIEIsInNamespace(const ClangNamespaceDecl * namespace_decl,DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die)3085 SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
3086 DWARFCompileUnit* cu,
3087 const DWARFDebugInfoEntry* die)
3088 {
3089 // No namespace specified, so the answesr i
3090 if (namespace_decl == NULL)
3091 return true;
3092
3093 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3094
3095 const DWARFDebugInfoEntry *decl_ctx_die = NULL;
3096 clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
3097 if (decl_ctx_die)
3098 {
3099 clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
3100
3101 if (clang_namespace_decl)
3102 {
3103 if (decl_ctx_die->Tag() != DW_TAG_namespace)
3104 {
3105 if (log)
3106 GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
3107 return false;
3108 }
3109
3110 if (clang_namespace_decl == die_clang_decl_ctx)
3111 return true;
3112 else
3113 return false;
3114 }
3115 else
3116 {
3117 // We have a namespace_decl that was not NULL but it contained
3118 // a NULL "clang::NamespaceDecl", so this means the global namespace
3119 // So as long the the contained decl context DIE isn't a namespace
3120 // we should be ok.
3121 if (decl_ctx_die->Tag() != DW_TAG_namespace)
3122 return true;
3123 }
3124 }
3125
3126 if (log)
3127 GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
3128
3129 return false;
3130 }
3131 uint32_t
FindGlobalVariables(const ConstString & name,const lldb_private::ClangNamespaceDecl * namespace_decl,bool append,uint32_t max_matches,VariableList & variables)3132 SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
3133 {
3134 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3135
3136 if (log)
3137 {
3138 GetObjectFile()->GetModule()->LogMessage (log,
3139 "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
3140 name.GetCString(),
3141 namespace_decl,
3142 append,
3143 max_matches);
3144 }
3145
3146 if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3147 return 0;
3148
3149 DWARFDebugInfo* info = DebugInfo();
3150 if (info == NULL)
3151 return 0;
3152
3153 // If we aren't appending the results to this list, then clear the list
3154 if (!append)
3155 variables.Clear();
3156
3157 // Remember how many variables are in the list before we search in case
3158 // we are appending the results to a variable list.
3159 const uint32_t original_size = variables.GetSize();
3160
3161 DIEArray die_offsets;
3162
3163 if (m_using_apple_tables)
3164 {
3165 if (m_apple_names_ap.get())
3166 {
3167 const char *name_cstr = name.GetCString();
3168 const char *base_name_start;
3169 const char *base_name_end = NULL;
3170
3171 if (!CPPLanguageRuntime::StripNamespacesFromVariableName(name_cstr, base_name_start, base_name_end))
3172 base_name_start = name_cstr;
3173
3174 m_apple_names_ap->FindByName (base_name_start, die_offsets);
3175 }
3176 }
3177 else
3178 {
3179 // Index the DWARF if we haven't already
3180 if (!m_indexed)
3181 Index ();
3182
3183 m_global_index.Find (name, die_offsets);
3184 }
3185
3186 const size_t num_die_matches = die_offsets.size();
3187 if (num_die_matches)
3188 {
3189 SymbolContext sc;
3190 sc.module_sp = m_obj_file->GetModule();
3191 assert (sc.module_sp);
3192
3193 DWARFDebugInfo* debug_info = DebugInfo();
3194 DWARFCompileUnit* dwarf_cu = NULL;
3195 const DWARFDebugInfoEntry* die = NULL;
3196 bool done = false;
3197 for (size_t i=0; i<num_die_matches && !done; ++i)
3198 {
3199 const dw_offset_t die_offset = die_offsets[i];
3200 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3201
3202 if (die)
3203 {
3204 switch (die->Tag())
3205 {
3206 default:
3207 case DW_TAG_subprogram:
3208 case DW_TAG_inlined_subroutine:
3209 case DW_TAG_try_block:
3210 case DW_TAG_catch_block:
3211 break;
3212
3213 case DW_TAG_variable:
3214 {
3215 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3216
3217 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3218 continue;
3219
3220 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3221
3222 if (variables.GetSize() - original_size >= max_matches)
3223 done = true;
3224 }
3225 break;
3226 }
3227 }
3228 else
3229 {
3230 if (m_using_apple_tables)
3231 {
3232 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
3233 die_offset, name.GetCString());
3234 }
3235 }
3236 }
3237 }
3238
3239 // Return the number of variable that were appended to the list
3240 const uint32_t num_matches = variables.GetSize() - original_size;
3241 if (log && num_matches > 0)
3242 {
3243 GetObjectFile()->GetModule()->LogMessage (log,
3244 "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
3245 name.GetCString(),
3246 namespace_decl,
3247 append,
3248 max_matches,
3249 num_matches);
3250 }
3251 return num_matches;
3252 }
3253
3254 uint32_t
FindGlobalVariables(const RegularExpression & regex,bool append,uint32_t max_matches,VariableList & variables)3255 SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
3256 {
3257 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3258
3259 if (log)
3260 {
3261 GetObjectFile()->GetModule()->LogMessage (log,
3262 "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
3263 regex.GetText(),
3264 append,
3265 max_matches);
3266 }
3267
3268 DWARFDebugInfo* info = DebugInfo();
3269 if (info == NULL)
3270 return 0;
3271
3272 // If we aren't appending the results to this list, then clear the list
3273 if (!append)
3274 variables.Clear();
3275
3276 // Remember how many variables are in the list before we search in case
3277 // we are appending the results to a variable list.
3278 const uint32_t original_size = variables.GetSize();
3279
3280 DIEArray die_offsets;
3281
3282 if (m_using_apple_tables)
3283 {
3284 if (m_apple_names_ap.get())
3285 {
3286 DWARFMappedHash::DIEInfoArray hash_data_array;
3287 if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3288 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3289 }
3290 }
3291 else
3292 {
3293 // Index the DWARF if we haven't already
3294 if (!m_indexed)
3295 Index ();
3296
3297 m_global_index.Find (regex, die_offsets);
3298 }
3299
3300 SymbolContext sc;
3301 sc.module_sp = m_obj_file->GetModule();
3302 assert (sc.module_sp);
3303
3304 DWARFCompileUnit* dwarf_cu = NULL;
3305 const DWARFDebugInfoEntry* die = NULL;
3306 const size_t num_matches = die_offsets.size();
3307 if (num_matches)
3308 {
3309 DWARFDebugInfo* debug_info = DebugInfo();
3310 for (size_t i=0; i<num_matches; ++i)
3311 {
3312 const dw_offset_t die_offset = die_offsets[i];
3313 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3314
3315 if (die)
3316 {
3317 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
3318
3319 ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
3320
3321 if (variables.GetSize() - original_size >= max_matches)
3322 break;
3323 }
3324 else
3325 {
3326 if (m_using_apple_tables)
3327 {
3328 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
3329 die_offset, regex.GetText());
3330 }
3331 }
3332 }
3333 }
3334
3335 // Return the number of variable that were appended to the list
3336 return variables.GetSize() - original_size;
3337 }
3338
3339
3340 bool
ResolveFunction(dw_offset_t die_offset,DWARFCompileUnit * & dwarf_cu,SymbolContextList & sc_list)3341 SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
3342 DWARFCompileUnit *&dwarf_cu,
3343 SymbolContextList& sc_list)
3344 {
3345 const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3346 return ResolveFunction (dwarf_cu, die, sc_list);
3347 }
3348
3349
3350 bool
ResolveFunction(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die,SymbolContextList & sc_list)3351 SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
3352 const DWARFDebugInfoEntry *die,
3353 SymbolContextList& sc_list)
3354 {
3355 SymbolContext sc;
3356
3357 if (die == NULL)
3358 return false;
3359
3360 // If we were passed a die that is not a function, just return false...
3361 if (die->Tag() != DW_TAG_subprogram && die->Tag() != DW_TAG_inlined_subroutine)
3362 return false;
3363
3364 const DWARFDebugInfoEntry* inlined_die = NULL;
3365 if (die->Tag() == DW_TAG_inlined_subroutine)
3366 {
3367 inlined_die = die;
3368
3369 while ((die = die->GetParent()) != NULL)
3370 {
3371 if (die->Tag() == DW_TAG_subprogram)
3372 break;
3373 }
3374 }
3375 assert (die->Tag() == DW_TAG_subprogram);
3376 if (GetFunction (cu, die, sc))
3377 {
3378 Address addr;
3379 // Parse all blocks if needed
3380 if (inlined_die)
3381 {
3382 sc.block = sc.function->GetBlock (true).FindBlockByID (MakeUserID(inlined_die->GetOffset()));
3383 assert (sc.block != NULL);
3384 if (sc.block->GetStartAddress (addr) == false)
3385 addr.Clear();
3386 }
3387 else
3388 {
3389 sc.block = NULL;
3390 addr = sc.function->GetAddressRange().GetBaseAddress();
3391 }
3392
3393 if (addr.IsValid())
3394 {
3395 sc_list.Append(sc);
3396 return true;
3397 }
3398 }
3399
3400 return false;
3401 }
3402
3403 void
FindFunctions(const ConstString & name,const NameToDIE & name_to_die,SymbolContextList & sc_list)3404 SymbolFileDWARF::FindFunctions (const ConstString &name,
3405 const NameToDIE &name_to_die,
3406 SymbolContextList& sc_list)
3407 {
3408 DIEArray die_offsets;
3409 if (name_to_die.Find (name, die_offsets))
3410 {
3411 ParseFunctions (die_offsets, sc_list);
3412 }
3413 }
3414
3415
3416 void
FindFunctions(const RegularExpression & regex,const NameToDIE & name_to_die,SymbolContextList & sc_list)3417 SymbolFileDWARF::FindFunctions (const RegularExpression ®ex,
3418 const NameToDIE &name_to_die,
3419 SymbolContextList& sc_list)
3420 {
3421 DIEArray die_offsets;
3422 if (name_to_die.Find (regex, die_offsets))
3423 {
3424 ParseFunctions (die_offsets, sc_list);
3425 }
3426 }
3427
3428
3429 void
FindFunctions(const RegularExpression & regex,const DWARFMappedHash::MemoryTable & memory_table,SymbolContextList & sc_list)3430 SymbolFileDWARF::FindFunctions (const RegularExpression ®ex,
3431 const DWARFMappedHash::MemoryTable &memory_table,
3432 SymbolContextList& sc_list)
3433 {
3434 DIEArray die_offsets;
3435 DWARFMappedHash::DIEInfoArray hash_data_array;
3436 if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
3437 {
3438 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
3439 ParseFunctions (die_offsets, sc_list);
3440 }
3441 }
3442
3443 void
ParseFunctions(const DIEArray & die_offsets,SymbolContextList & sc_list)3444 SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
3445 SymbolContextList& sc_list)
3446 {
3447 const size_t num_matches = die_offsets.size();
3448 if (num_matches)
3449 {
3450 SymbolContext sc;
3451
3452 DWARFCompileUnit* dwarf_cu = NULL;
3453 for (size_t i=0; i<num_matches; ++i)
3454 {
3455 const dw_offset_t die_offset = die_offsets[i];
3456 ResolveFunction (die_offset, dwarf_cu, sc_list);
3457 }
3458 }
3459 }
3460
3461 bool
FunctionDieMatchesPartialName(const DWARFDebugInfoEntry * die,const DWARFCompileUnit * dwarf_cu,uint32_t name_type_mask,const char * partial_name,const char * base_name_start,const char * base_name_end)3462 SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
3463 const DWARFCompileUnit *dwarf_cu,
3464 uint32_t name_type_mask,
3465 const char *partial_name,
3466 const char *base_name_start,
3467 const char *base_name_end)
3468 {
3469 // If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
3470 if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
3471 {
3472 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
3473 if (!containing_decl_ctx)
3474 return false;
3475
3476 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
3477
3478 if (name_type_mask == eFunctionNameTypeMethod)
3479 {
3480 if (is_cxx_method == false)
3481 return false;
3482 }
3483
3484 if (name_type_mask == eFunctionNameTypeBase)
3485 {
3486 if (is_cxx_method == true)
3487 return false;
3488 }
3489 }
3490
3491 // Now we need to check whether the name we got back for this type matches the extra specifications
3492 // that were in the name we're looking up:
3493 if (base_name_start != partial_name || *base_name_end != '\0')
3494 {
3495 // First see if the stuff to the left matches the full name. To do that let's see if
3496 // we can pull out the mips linkage name attribute:
3497
3498 Mangled best_name;
3499 DWARFDebugInfoEntry::Attributes attributes;
3500 DWARFFormValue form_value;
3501 die->GetAttributes(this, dwarf_cu, NULL, attributes);
3502 uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
3503 if (idx == UINT32_MAX)
3504 idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
3505 if (idx != UINT32_MAX)
3506 {
3507 if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
3508 {
3509 const char *mangled_name = form_value.AsCString(&get_debug_str_data());
3510 if (mangled_name)
3511 best_name.SetValue (ConstString(mangled_name), true);
3512 }
3513 }
3514
3515 if (!best_name)
3516 {
3517 idx = attributes.FindAttributeIndex(DW_AT_name);
3518 if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
3519 {
3520 const char *name = form_value.AsCString(&get_debug_str_data());
3521 best_name.SetValue (ConstString(name), false);
3522 }
3523 }
3524
3525 if (best_name.GetDemangledName())
3526 {
3527 const char *demangled = best_name.GetDemangledName().GetCString();
3528 if (demangled)
3529 {
3530 std::string name_no_parens(partial_name, base_name_end - partial_name);
3531 const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
3532 if (partial_in_demangled == NULL)
3533 return false;
3534 else
3535 {
3536 // Sort out the case where our name is something like "Process::Destroy" and the match is
3537 // "SBProcess::Destroy" - that shouldn't be a match. We should really always match on
3538 // namespace boundaries...
3539
3540 if (partial_name[0] == ':' && partial_name[1] == ':')
3541 {
3542 // The partial name was already on a namespace boundary so all matches are good.
3543 return true;
3544 }
3545 else if (partial_in_demangled == demangled)
3546 {
3547 // They both start the same, so this is an good match.
3548 return true;
3549 }
3550 else
3551 {
3552 if (partial_in_demangled - demangled == 1)
3553 {
3554 // Only one character difference, can't be a namespace boundary...
3555 return false;
3556 }
3557 else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
3558 {
3559 // We are on a namespace boundary, so this is also good.
3560 return true;
3561 }
3562 else
3563 return false;
3564 }
3565 }
3566 }
3567 }
3568 }
3569
3570 return true;
3571 }
3572
3573 uint32_t
FindFunctions(const ConstString & name,const lldb_private::ClangNamespaceDecl * namespace_decl,uint32_t name_type_mask,bool include_inlines,bool append,SymbolContextList & sc_list)3574 SymbolFileDWARF::FindFunctions (const ConstString &name,
3575 const lldb_private::ClangNamespaceDecl *namespace_decl,
3576 uint32_t name_type_mask,
3577 bool include_inlines,
3578 bool append,
3579 SymbolContextList& sc_list)
3580 {
3581 Timer scoped_timer (__PRETTY_FUNCTION__,
3582 "SymbolFileDWARF::FindFunctions (name = '%s')",
3583 name.AsCString());
3584
3585 // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
3586 assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
3587
3588 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3589
3590 if (log)
3591 {
3592 GetObjectFile()->GetModule()->LogMessage (log,
3593 "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
3594 name.GetCString(),
3595 name_type_mask,
3596 append);
3597 }
3598
3599 // If we aren't appending the results to this list, then clear the list
3600 if (!append)
3601 sc_list.Clear();
3602
3603 if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3604 return 0;
3605
3606 // If name is empty then we won't find anything.
3607 if (name.IsEmpty())
3608 return 0;
3609
3610 // Remember how many sc_list are in the list before we search in case
3611 // we are appending the results to a variable list.
3612
3613 const char *name_cstr = name.GetCString();
3614
3615 const uint32_t original_size = sc_list.GetSize();
3616
3617 DWARFDebugInfo* info = DebugInfo();
3618 if (info == NULL)
3619 return 0;
3620
3621 DWARFCompileUnit *dwarf_cu = NULL;
3622 std::set<const DWARFDebugInfoEntry *> resolved_dies;
3623 if (m_using_apple_tables)
3624 {
3625 if (m_apple_names_ap.get())
3626 {
3627
3628 DIEArray die_offsets;
3629
3630 uint32_t num_matches = 0;
3631
3632 if (name_type_mask & eFunctionNameTypeFull)
3633 {
3634 // If they asked for the full name, match what they typed. At some point we may
3635 // want to canonicalize this (strip double spaces, etc. For now, we just add all the
3636 // dies that we find by exact match.
3637 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3638 for (uint32_t i = 0; i < num_matches; i++)
3639 {
3640 const dw_offset_t die_offset = die_offsets[i];
3641 const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3642 if (die)
3643 {
3644 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3645 continue;
3646
3647 if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3648 continue;
3649
3650 if (resolved_dies.find(die) == resolved_dies.end())
3651 {
3652 if (ResolveFunction (dwarf_cu, die, sc_list))
3653 resolved_dies.insert(die);
3654 }
3655 }
3656 else
3657 {
3658 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3659 die_offset, name_cstr);
3660 }
3661 }
3662 }
3663
3664 if (name_type_mask & eFunctionNameTypeSelector)
3665 {
3666 if (namespace_decl && *namespace_decl)
3667 return 0; // no selectors in namespaces
3668
3669 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3670 // Now make sure these are actually ObjC methods. In this case we can simply look up the name,
3671 // and if it is an ObjC method name, we're good.
3672
3673 for (uint32_t i = 0; i < num_matches; i++)
3674 {
3675 const dw_offset_t die_offset = die_offsets[i];
3676 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3677 if (die)
3678 {
3679 const char *die_name = die->GetName(this, dwarf_cu);
3680 if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
3681 {
3682 if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3683 continue;
3684
3685 if (resolved_dies.find(die) == resolved_dies.end())
3686 {
3687 if (ResolveFunction (dwarf_cu, die, sc_list))
3688 resolved_dies.insert(die);
3689 }
3690 }
3691 }
3692 else
3693 {
3694 GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3695 die_offset, name_cstr);
3696 }
3697 }
3698 die_offsets.clear();
3699 }
3700
3701 if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
3702 {
3703 // The apple_names table stores just the "base name" of C++ methods in the table. So we have to
3704 // extract the base name, look that up, and if there is any other information in the name we were
3705 // passed in we have to post-filter based on that.
3706
3707 // FIXME: Arrange the logic above so that we don't calculate the base name twice:
3708 num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
3709
3710 for (uint32_t i = 0; i < num_matches; i++)
3711 {
3712 const dw_offset_t die_offset = die_offsets[i];
3713 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
3714 if (die)
3715 {
3716 if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3717 continue;
3718
3719 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3720 continue;
3721
3722 // If we get to here, the die is good, and we should add it:
3723 if (resolved_dies.find(die) == resolved_dies.end())
3724 if (ResolveFunction (dwarf_cu, die, sc_list))
3725 {
3726 bool keep_die = true;
3727 if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
3728 {
3729 // We are looking for either basenames or methods, so we need to
3730 // trim out the ones we won't want by looking at the type
3731 SymbolContext sc;
3732 if (sc_list.GetLastContext(sc))
3733 {
3734 if (sc.block)
3735 {
3736 // We have an inlined function
3737 }
3738 else if (sc.function)
3739 {
3740 Type *type = sc.function->GetType();
3741
3742 if (type)
3743 {
3744 clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
3745 if (decl_ctx->isRecord())
3746 {
3747 if (name_type_mask & eFunctionNameTypeBase)
3748 {
3749 sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3750 keep_die = false;
3751 }
3752 }
3753 else
3754 {
3755 if (name_type_mask & eFunctionNameTypeMethod)
3756 {
3757 sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
3758 keep_die = false;
3759 }
3760 }
3761 }
3762 else
3763 {
3764 GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
3765 die_offset);
3766 }
3767 }
3768 }
3769 }
3770 if (keep_die)
3771 resolved_dies.insert(die);
3772 }
3773 }
3774 else
3775 {
3776 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
3777 die_offset, name_cstr);
3778 }
3779 }
3780 die_offsets.clear();
3781 }
3782 }
3783 }
3784 else
3785 {
3786
3787 // Index the DWARF if we haven't already
3788 if (!m_indexed)
3789 Index ();
3790
3791 if (name_type_mask & eFunctionNameTypeFull)
3792 {
3793 FindFunctions (name, m_function_fullname_index, sc_list);
3794
3795 // FIXME Temporary workaround for global/anonymous namespace
3796 // functions on FreeBSD and Linux
3797 #if defined (__FreeBSD__) || defined (__linux__)
3798 // If we didn't find any functions in the global namespace try
3799 // looking in the basename index but ignore any returned
3800 // functions that have a namespace (ie. mangled names starting with
3801 // '_ZN') but keep functions which have an anonymous namespace
3802 if (sc_list.GetSize() == 0)
3803 {
3804 SymbolContextList temp_sc_list;
3805 FindFunctions (name, m_function_basename_index, temp_sc_list);
3806 if (!namespace_decl)
3807 {
3808 SymbolContext sc;
3809 for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
3810 {
3811 if (temp_sc_list.GetContextAtIndex(i, sc))
3812 {
3813 ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
3814 ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
3815 if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
3816 !strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
3817 {
3818 sc_list.Append(sc);
3819 }
3820 }
3821 }
3822 }
3823 }
3824 #endif
3825 }
3826 DIEArray die_offsets;
3827 DWARFCompileUnit *dwarf_cu = NULL;
3828
3829 if (name_type_mask & eFunctionNameTypeBase)
3830 {
3831 uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
3832 for (uint32_t i = 0; i < num_base; i++)
3833 {
3834 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3835 if (die)
3836 {
3837 if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3838 continue;
3839
3840 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
3841 continue;
3842
3843 // If we get to here, the die is good, and we should add it:
3844 if (resolved_dies.find(die) == resolved_dies.end())
3845 {
3846 if (ResolveFunction (dwarf_cu, die, sc_list))
3847 resolved_dies.insert(die);
3848 }
3849 }
3850 }
3851 die_offsets.clear();
3852 }
3853
3854 if (name_type_mask & eFunctionNameTypeMethod)
3855 {
3856 if (namespace_decl && *namespace_decl)
3857 return 0; // no methods in namespaces
3858
3859 uint32_t num_base = m_function_method_index.Find(name, die_offsets);
3860 {
3861 for (uint32_t i = 0; i < num_base; i++)
3862 {
3863 const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
3864 if (die)
3865 {
3866 if (!include_inlines && die->Tag() == DW_TAG_inlined_subroutine)
3867 continue;
3868
3869 // If we get to here, the die is good, and we should add it:
3870 if (resolved_dies.find(die) == resolved_dies.end())
3871 {
3872 if (ResolveFunction (dwarf_cu, die, sc_list))
3873 resolved_dies.insert(die);
3874 }
3875 }
3876 }
3877 }
3878 die_offsets.clear();
3879 }
3880
3881 if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
3882 {
3883 FindFunctions (name, m_function_selector_index, sc_list);
3884 }
3885
3886 }
3887
3888 // Return the number of variable that were appended to the list
3889 const uint32_t num_matches = sc_list.GetSize() - original_size;
3890
3891 if (log && num_matches > 0)
3892 {
3893 GetObjectFile()->GetModule()->LogMessage (log,
3894 "SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list) => %u",
3895 name.GetCString(),
3896 name_type_mask,
3897 append,
3898 num_matches);
3899 }
3900 return num_matches;
3901 }
3902
3903 uint32_t
FindFunctions(const RegularExpression & regex,bool include_inlines,bool append,SymbolContextList & sc_list)3904 SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
3905 {
3906 Timer scoped_timer (__PRETTY_FUNCTION__,
3907 "SymbolFileDWARF::FindFunctions (regex = '%s')",
3908 regex.GetText());
3909
3910 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3911
3912 if (log)
3913 {
3914 GetObjectFile()->GetModule()->LogMessage (log,
3915 "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
3916 regex.GetText(),
3917 append);
3918 }
3919
3920
3921 // If we aren't appending the results to this list, then clear the list
3922 if (!append)
3923 sc_list.Clear();
3924
3925 // Remember how many sc_list are in the list before we search in case
3926 // we are appending the results to a variable list.
3927 uint32_t original_size = sc_list.GetSize();
3928
3929 if (m_using_apple_tables)
3930 {
3931 if (m_apple_names_ap.get())
3932 FindFunctions (regex, *m_apple_names_ap, sc_list);
3933 }
3934 else
3935 {
3936 // Index the DWARF if we haven't already
3937 if (!m_indexed)
3938 Index ();
3939
3940 FindFunctions (regex, m_function_basename_index, sc_list);
3941
3942 FindFunctions (regex, m_function_fullname_index, sc_list);
3943 }
3944
3945 // Return the number of variable that were appended to the list
3946 return sc_list.GetSize() - original_size;
3947 }
3948
3949 uint32_t
FindTypes(const SymbolContext & sc,const ConstString & name,const lldb_private::ClangNamespaceDecl * namespace_decl,bool append,uint32_t max_matches,TypeList & types)3950 SymbolFileDWARF::FindTypes (const SymbolContext& sc,
3951 const ConstString &name,
3952 const lldb_private::ClangNamespaceDecl *namespace_decl,
3953 bool append,
3954 uint32_t max_matches,
3955 TypeList& types)
3956 {
3957 DWARFDebugInfo* info = DebugInfo();
3958 if (info == NULL)
3959 return 0;
3960
3961 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
3962
3963 if (log)
3964 {
3965 if (namespace_decl)
3966 {
3967 GetObjectFile()->GetModule()->LogMessage (log,
3968 "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
3969 name.GetCString(),
3970 namespace_decl->GetNamespaceDecl(),
3971 namespace_decl->GetQualifiedName().c_str(),
3972 append,
3973 max_matches);
3974 }
3975 else
3976 {
3977 GetObjectFile()->GetModule()->LogMessage (log,
3978 "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
3979 name.GetCString(),
3980 append,
3981 max_matches);
3982 }
3983 }
3984
3985 // If we aren't appending the results to this list, then clear the list
3986 if (!append)
3987 types.Clear();
3988
3989 if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
3990 return 0;
3991
3992 DIEArray die_offsets;
3993
3994 if (m_using_apple_tables)
3995 {
3996 if (m_apple_types_ap.get())
3997 {
3998 const char *name_cstr = name.GetCString();
3999 m_apple_types_ap->FindByName (name_cstr, die_offsets);
4000 }
4001 }
4002 else
4003 {
4004 if (!m_indexed)
4005 Index ();
4006
4007 m_type_index.Find (name, die_offsets);
4008 }
4009
4010 const size_t num_die_matches = die_offsets.size();
4011
4012 if (num_die_matches)
4013 {
4014 const uint32_t initial_types_size = types.GetSize();
4015 DWARFCompileUnit* dwarf_cu = NULL;
4016 const DWARFDebugInfoEntry* die = NULL;
4017 DWARFDebugInfo* debug_info = DebugInfo();
4018 for (size_t i=0; i<num_die_matches; ++i)
4019 {
4020 const dw_offset_t die_offset = die_offsets[i];
4021 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4022
4023 if (die)
4024 {
4025 if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
4026 continue;
4027
4028 Type *matching_type = ResolveType (dwarf_cu, die);
4029 if (matching_type)
4030 {
4031 // We found a type pointer, now find the shared pointer form our type list
4032 types.InsertUnique (matching_type->shared_from_this());
4033 if (types.GetSize() >= max_matches)
4034 break;
4035 }
4036 }
4037 else
4038 {
4039 if (m_using_apple_tables)
4040 {
4041 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4042 die_offset, name.GetCString());
4043 }
4044 }
4045
4046 }
4047 const uint32_t num_matches = types.GetSize() - initial_types_size;
4048 if (log && num_matches)
4049 {
4050 if (namespace_decl)
4051 {
4052 GetObjectFile()->GetModule()->LogMessage (log,
4053 "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
4054 name.GetCString(),
4055 namespace_decl->GetNamespaceDecl(),
4056 namespace_decl->GetQualifiedName().c_str(),
4057 append,
4058 max_matches,
4059 num_matches);
4060 }
4061 else
4062 {
4063 GetObjectFile()->GetModule()->LogMessage (log,
4064 "SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
4065 name.GetCString(),
4066 append,
4067 max_matches,
4068 num_matches);
4069 }
4070 }
4071 return num_matches;
4072 }
4073 return 0;
4074 }
4075
4076
4077 ClangNamespaceDecl
FindNamespace(const SymbolContext & sc,const ConstString & name,const lldb_private::ClangNamespaceDecl * parent_namespace_decl)4078 SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
4079 const ConstString &name,
4080 const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
4081 {
4082 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
4083
4084 if (log)
4085 {
4086 GetObjectFile()->GetModule()->LogMessage (log,
4087 "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
4088 name.GetCString());
4089 }
4090
4091 if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
4092 return ClangNamespaceDecl();
4093
4094 ClangNamespaceDecl namespace_decl;
4095 DWARFDebugInfo* info = DebugInfo();
4096 if (info)
4097 {
4098 DIEArray die_offsets;
4099
4100 // Index if we already haven't to make sure the compile units
4101 // get indexed and make their global DIE index list
4102 if (m_using_apple_tables)
4103 {
4104 if (m_apple_namespaces_ap.get())
4105 {
4106 const char *name_cstr = name.GetCString();
4107 m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
4108 }
4109 }
4110 else
4111 {
4112 if (!m_indexed)
4113 Index ();
4114
4115 m_namespace_index.Find (name, die_offsets);
4116 }
4117
4118 DWARFCompileUnit* dwarf_cu = NULL;
4119 const DWARFDebugInfoEntry* die = NULL;
4120 const size_t num_matches = die_offsets.size();
4121 if (num_matches)
4122 {
4123 DWARFDebugInfo* debug_info = DebugInfo();
4124 for (size_t i=0; i<num_matches; ++i)
4125 {
4126 const dw_offset_t die_offset = die_offsets[i];
4127 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
4128
4129 if (die)
4130 {
4131 if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
4132 continue;
4133
4134 clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
4135 if (clang_namespace_decl)
4136 {
4137 namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
4138 namespace_decl.SetNamespaceDecl (clang_namespace_decl);
4139 break;
4140 }
4141 }
4142 else
4143 {
4144 if (m_using_apple_tables)
4145 {
4146 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
4147 die_offset, name.GetCString());
4148 }
4149 }
4150
4151 }
4152 }
4153 }
4154 if (log && namespace_decl.GetNamespaceDecl())
4155 {
4156 GetObjectFile()->GetModule()->LogMessage (log,
4157 "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
4158 name.GetCString(),
4159 namespace_decl.GetNamespaceDecl(),
4160 namespace_decl.GetQualifiedName().c_str());
4161 }
4162
4163 return namespace_decl;
4164 }
4165
4166 uint32_t
FindTypes(std::vector<dw_offset_t> die_offsets,uint32_t max_matches,TypeList & types)4167 SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
4168 {
4169 // Remember how many sc_list are in the list before we search in case
4170 // we are appending the results to a variable list.
4171 uint32_t original_size = types.GetSize();
4172
4173 const uint32_t num_die_offsets = die_offsets.size();
4174 // Parse all of the types we found from the pubtypes matches
4175 uint32_t i;
4176 uint32_t num_matches = 0;
4177 for (i = 0; i < num_die_offsets; ++i)
4178 {
4179 Type *matching_type = ResolveTypeUID (die_offsets[i]);
4180 if (matching_type)
4181 {
4182 // We found a type pointer, now find the shared pointer form our type list
4183 types.InsertUnique (matching_type->shared_from_this());
4184 ++num_matches;
4185 if (num_matches >= max_matches)
4186 break;
4187 }
4188 }
4189
4190 // Return the number of variable that were appended to the list
4191 return types.GetSize() - original_size;
4192 }
4193
4194
4195 size_t
ParseChildParameters(const SymbolContext & sc,clang::DeclContext * containing_decl_ctx,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die,bool skip_artificial,bool & is_static,bool & is_variadic,TypeList * type_list,std::vector<ClangASTType> & function_param_types,std::vector<clang::ParmVarDecl * > & function_param_decls,unsigned & type_quals,ClangASTContext::TemplateParameterInfos & template_param_infos)4196 SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
4197 clang::DeclContext *containing_decl_ctx,
4198 DWARFCompileUnit* dwarf_cu,
4199 const DWARFDebugInfoEntry *parent_die,
4200 bool skip_artificial,
4201 bool &is_static,
4202 bool &is_variadic,
4203 TypeList* type_list,
4204 std::vector<ClangASTType>& function_param_types,
4205 std::vector<clang::ParmVarDecl*>& function_param_decls,
4206 unsigned &type_quals,
4207 ClangASTContext::TemplateParameterInfos &template_param_infos)
4208 {
4209 if (parent_die == NULL)
4210 return 0;
4211
4212 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4213
4214 size_t arg_idx = 0;
4215 const DWARFDebugInfoEntry *die;
4216 for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4217 {
4218 dw_tag_t tag = die->Tag();
4219 switch (tag)
4220 {
4221 case DW_TAG_formal_parameter:
4222 {
4223 DWARFDebugInfoEntry::Attributes attributes;
4224 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4225 if (num_attributes > 0)
4226 {
4227 const char *name = NULL;
4228 Declaration decl;
4229 dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
4230 bool is_artificial = false;
4231 // one of None, Auto, Register, Extern, Static, PrivateExtern
4232
4233 clang::StorageClass storage = clang::SC_None;
4234 uint32_t i;
4235 for (i=0; i<num_attributes; ++i)
4236 {
4237 const dw_attr_t attr = attributes.AttributeAtIndex(i);
4238 DWARFFormValue form_value;
4239 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4240 {
4241 switch (attr)
4242 {
4243 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4244 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
4245 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4246 case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
4247 case DW_AT_type: param_type_die_offset = form_value.Reference(dwarf_cu); break;
4248 case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
4249 case DW_AT_location:
4250 // if (form_value.BlockData())
4251 // {
4252 // const DWARFDataExtractor& debug_info_data = debug_info();
4253 // uint32_t block_length = form_value.Unsigned();
4254 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
4255 // }
4256 // else
4257 // {
4258 // }
4259 // break;
4260 case DW_AT_const_value:
4261 case DW_AT_default_value:
4262 case DW_AT_description:
4263 case DW_AT_endianity:
4264 case DW_AT_is_optional:
4265 case DW_AT_segment:
4266 case DW_AT_variable_parameter:
4267 default:
4268 case DW_AT_abstract_origin:
4269 case DW_AT_sibling:
4270 break;
4271 }
4272 }
4273 }
4274
4275 bool skip = false;
4276 if (skip_artificial)
4277 {
4278 if (is_artificial)
4279 {
4280 // In order to determine if a C++ member function is
4281 // "const" we have to look at the const-ness of "this"...
4282 // Ugly, but that
4283 if (arg_idx == 0)
4284 {
4285 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
4286 {
4287 // Often times compilers omit the "this" name for the
4288 // specification DIEs, so we can't rely upon the name
4289 // being in the formal parameter DIE...
4290 if (name == NULL || ::strcmp(name, "this")==0)
4291 {
4292 Type *this_type = ResolveTypeUID (param_type_die_offset);
4293 if (this_type)
4294 {
4295 uint32_t encoding_mask = this_type->GetEncodingMask();
4296 if (encoding_mask & Type::eEncodingIsPointerUID)
4297 {
4298 is_static = false;
4299
4300 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
4301 type_quals |= clang::Qualifiers::Const;
4302 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
4303 type_quals |= clang::Qualifiers::Volatile;
4304 }
4305 }
4306 }
4307 }
4308 }
4309 skip = true;
4310 }
4311 else
4312 {
4313
4314 // HACK: Objective C formal parameters "self" and "_cmd"
4315 // are not marked as artificial in the DWARF...
4316 CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
4317 if (comp_unit)
4318 {
4319 switch (comp_unit->GetLanguage())
4320 {
4321 case eLanguageTypeObjC:
4322 case eLanguageTypeObjC_plus_plus:
4323 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
4324 skip = true;
4325 break;
4326 default:
4327 break;
4328 }
4329 }
4330 }
4331 }
4332
4333 if (!skip)
4334 {
4335 Type *type = ResolveTypeUID(param_type_die_offset);
4336 if (type)
4337 {
4338 function_param_types.push_back (type->GetClangForwardType());
4339
4340 clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
4341 type->GetClangForwardType(),
4342 storage);
4343 assert(param_var_decl);
4344 function_param_decls.push_back(param_var_decl);
4345
4346 GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
4347 }
4348 }
4349 }
4350 arg_idx++;
4351 }
4352 break;
4353
4354 case DW_TAG_unspecified_parameters:
4355 is_variadic = true;
4356 break;
4357
4358 case DW_TAG_template_type_parameter:
4359 case DW_TAG_template_value_parameter:
4360 ParseTemplateDIE (dwarf_cu, die,template_param_infos);
4361 break;
4362
4363 default:
4364 break;
4365 }
4366 }
4367 return arg_idx;
4368 }
4369
4370 size_t
ParseChildEnumerators(const SymbolContext & sc,lldb_private::ClangASTType & clang_type,bool is_signed,uint32_t enumerator_byte_size,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die)4371 SymbolFileDWARF::ParseChildEnumerators
4372 (
4373 const SymbolContext& sc,
4374 lldb_private::ClangASTType &clang_type,
4375 bool is_signed,
4376 uint32_t enumerator_byte_size,
4377 DWARFCompileUnit* dwarf_cu,
4378 const DWARFDebugInfoEntry *parent_die
4379 )
4380 {
4381 if (parent_die == NULL)
4382 return 0;
4383
4384 size_t enumerators_added = 0;
4385 const DWARFDebugInfoEntry *die;
4386 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4387
4388 for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4389 {
4390 const dw_tag_t tag = die->Tag();
4391 if (tag == DW_TAG_enumerator)
4392 {
4393 DWARFDebugInfoEntry::Attributes attributes;
4394 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4395 if (num_child_attributes > 0)
4396 {
4397 const char *name = NULL;
4398 bool got_value = false;
4399 int64_t enum_value = 0;
4400 Declaration decl;
4401
4402 uint32_t i;
4403 for (i=0; i<num_child_attributes; ++i)
4404 {
4405 const dw_attr_t attr = attributes.AttributeAtIndex(i);
4406 DWARFFormValue form_value;
4407 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4408 {
4409 switch (attr)
4410 {
4411 case DW_AT_const_value:
4412 got_value = true;
4413 if (is_signed)
4414 enum_value = form_value.Signed();
4415 else
4416 enum_value = form_value.Unsigned();
4417 break;
4418
4419 case DW_AT_name:
4420 name = form_value.AsCString(&get_debug_str_data());
4421 break;
4422
4423 case DW_AT_description:
4424 default:
4425 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
4426 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
4427 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
4428 case DW_AT_sibling:
4429 break;
4430 }
4431 }
4432 }
4433
4434 if (name && name[0] && got_value)
4435 {
4436 clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
4437 decl,
4438 name,
4439 enum_value,
4440 enumerator_byte_size * 8);
4441 ++enumerators_added;
4442 }
4443 }
4444 }
4445 }
4446 return enumerators_added;
4447 }
4448
4449 void
ParseChildArrayInfo(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * parent_die,int64_t & first_index,std::vector<uint64_t> & element_orders,uint32_t & byte_stride,uint32_t & bit_stride)4450 SymbolFileDWARF::ParseChildArrayInfo
4451 (
4452 const SymbolContext& sc,
4453 DWARFCompileUnit* dwarf_cu,
4454 const DWARFDebugInfoEntry *parent_die,
4455 int64_t& first_index,
4456 std::vector<uint64_t>& element_orders,
4457 uint32_t& byte_stride,
4458 uint32_t& bit_stride
4459 )
4460 {
4461 if (parent_die == NULL)
4462 return;
4463
4464 const DWARFDebugInfoEntry *die;
4465 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
4466 for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
4467 {
4468 const dw_tag_t tag = die->Tag();
4469 switch (tag)
4470 {
4471 case DW_TAG_subrange_type:
4472 {
4473 DWARFDebugInfoEntry::Attributes attributes;
4474 const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
4475 if (num_child_attributes > 0)
4476 {
4477 uint64_t num_elements = 0;
4478 uint64_t lower_bound = 0;
4479 uint64_t upper_bound = 0;
4480 bool upper_bound_valid = false;
4481 uint32_t i;
4482 for (i=0; i<num_child_attributes; ++i)
4483 {
4484 const dw_attr_t attr = attributes.AttributeAtIndex(i);
4485 DWARFFormValue form_value;
4486 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
4487 {
4488 switch (attr)
4489 {
4490 case DW_AT_name:
4491 break;
4492
4493 case DW_AT_count:
4494 num_elements = form_value.Unsigned();
4495 break;
4496
4497 case DW_AT_bit_stride:
4498 bit_stride = form_value.Unsigned();
4499 break;
4500
4501 case DW_AT_byte_stride:
4502 byte_stride = form_value.Unsigned();
4503 break;
4504
4505 case DW_AT_lower_bound:
4506 lower_bound = form_value.Unsigned();
4507 break;
4508
4509 case DW_AT_upper_bound:
4510 upper_bound_valid = true;
4511 upper_bound = form_value.Unsigned();
4512 break;
4513
4514 default:
4515 case DW_AT_abstract_origin:
4516 case DW_AT_accessibility:
4517 case DW_AT_allocated:
4518 case DW_AT_associated:
4519 case DW_AT_data_location:
4520 case DW_AT_declaration:
4521 case DW_AT_description:
4522 case DW_AT_sibling:
4523 case DW_AT_threads_scaled:
4524 case DW_AT_type:
4525 case DW_AT_visibility:
4526 break;
4527 }
4528 }
4529 }
4530
4531 if (num_elements == 0)
4532 {
4533 if (upper_bound_valid && upper_bound >= lower_bound)
4534 num_elements = upper_bound - lower_bound + 1;
4535 }
4536
4537 element_orders.push_back (num_elements);
4538 }
4539 }
4540 break;
4541 }
4542 }
4543 }
4544
4545 TypeSP
GetTypeForDIE(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die)4546 SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
4547 {
4548 TypeSP type_sp;
4549 if (die != NULL)
4550 {
4551 assert(dwarf_cu != NULL);
4552 Type *type_ptr = m_die_to_type.lookup (die);
4553 if (type_ptr == NULL)
4554 {
4555 CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
4556 assert (lldb_cu);
4557 SymbolContext sc(lldb_cu);
4558 type_sp = ParseType(sc, dwarf_cu, die, NULL);
4559 }
4560 else if (type_ptr != DIE_IS_BEING_PARSED)
4561 {
4562 // Grab the existing type from the master types lists
4563 type_sp = type_ptr->shared_from_this();
4564 }
4565
4566 }
4567 return type_sp;
4568 }
4569
4570 clang::DeclContext *
GetClangDeclContextContainingDIEOffset(dw_offset_t die_offset)4571 SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
4572 {
4573 if (die_offset != DW_INVALID_OFFSET)
4574 {
4575 DWARFCompileUnitSP cu_sp;
4576 const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
4577 return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
4578 }
4579 return NULL;
4580 }
4581
4582 clang::DeclContext *
GetClangDeclContextForDIEOffset(const SymbolContext & sc,dw_offset_t die_offset)4583 SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
4584 {
4585 if (die_offset != DW_INVALID_OFFSET)
4586 {
4587 DWARFDebugInfo* debug_info = DebugInfo();
4588 if (debug_info)
4589 {
4590 DWARFCompileUnitSP cu_sp;
4591 const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
4592 if (die)
4593 return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
4594 }
4595 }
4596 return NULL;
4597 }
4598
4599 clang::NamespaceDecl *
ResolveNamespaceDIE(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die)4600 SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
4601 {
4602 if (die && die->Tag() == DW_TAG_namespace)
4603 {
4604 // See if we already parsed this namespace DIE and associated it with a
4605 // uniqued namespace declaration
4606 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
4607 if (namespace_decl)
4608 return namespace_decl;
4609 else
4610 {
4611 const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
4612 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
4613 namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
4614 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4615 if (log)
4616 {
4617 if (namespace_name)
4618 {
4619 GetObjectFile()->GetModule()->LogMessage (log,
4620 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
4621 GetClangASTContext().getASTContext(),
4622 MakeUserID(die->GetOffset()),
4623 namespace_name,
4624 namespace_decl,
4625 namespace_decl->getOriginalNamespace());
4626 }
4627 else
4628 {
4629 GetObjectFile()->GetModule()->LogMessage (log,
4630 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
4631 GetClangASTContext().getASTContext(),
4632 MakeUserID(die->GetOffset()),
4633 namespace_decl,
4634 namespace_decl->getOriginalNamespace());
4635 }
4636 }
4637
4638 if (namespace_decl)
4639 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
4640 return namespace_decl;
4641 }
4642 }
4643 return NULL;
4644 }
4645
4646 clang::DeclContext *
GetClangDeclContextForDIE(const SymbolContext & sc,DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die)4647 SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4648 {
4649 clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4650 if (clang_decl_ctx)
4651 return clang_decl_ctx;
4652 // If this DIE has a specification, or an abstract origin, then trace to those.
4653
4654 dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4655 if (die_offset != DW_INVALID_OFFSET)
4656 return GetClangDeclContextForDIEOffset (sc, die_offset);
4657
4658 die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4659 if (die_offset != DW_INVALID_OFFSET)
4660 return GetClangDeclContextForDIEOffset (sc, die_offset);
4661
4662 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
4663 if (log)
4664 GetObjectFile()->GetModule()->LogMessage(log, "SymbolFileDWARF::GetClangDeclContextForDIE (die = 0x%8.8x) %s '%s'", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), die->GetName(this, cu));
4665 // This is the DIE we want. Parse it, then query our map.
4666 bool assert_not_being_parsed = true;
4667 ResolveTypeUID (cu, die, assert_not_being_parsed);
4668
4669 clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
4670
4671 return clang_decl_ctx;
4672 }
4673
4674 clang::DeclContext *
GetClangDeclContextContainingDIE(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die,const DWARFDebugInfoEntry ** decl_ctx_die_copy)4675 SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
4676 {
4677 if (m_clang_tu_decl == NULL)
4678 m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
4679
4680 const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
4681
4682 if (decl_ctx_die_copy)
4683 *decl_ctx_die_copy = decl_ctx_die;
4684
4685 if (decl_ctx_die)
4686 {
4687
4688 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
4689 if (pos != m_die_to_decl_ctx.end())
4690 return pos->second;
4691
4692 switch (decl_ctx_die->Tag())
4693 {
4694 case DW_TAG_compile_unit:
4695 return m_clang_tu_decl;
4696
4697 case DW_TAG_namespace:
4698 return ResolveNamespaceDIE (cu, decl_ctx_die);
4699 break;
4700
4701 case DW_TAG_structure_type:
4702 case DW_TAG_union_type:
4703 case DW_TAG_class_type:
4704 {
4705 Type* type = ResolveType (cu, decl_ctx_die);
4706 if (type)
4707 {
4708 clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
4709 if (decl_ctx)
4710 {
4711 LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
4712 if (decl_ctx)
4713 return decl_ctx;
4714 }
4715 }
4716 }
4717 break;
4718
4719 default:
4720 break;
4721 }
4722 }
4723 return m_clang_tu_decl;
4724 }
4725
4726
4727 const DWARFDebugInfoEntry *
GetDeclContextDIEContainingDIE(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die)4728 SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
4729 {
4730 if (cu && die)
4731 {
4732 const DWARFDebugInfoEntry * const decl_die = die;
4733
4734 while (die != NULL)
4735 {
4736 // If this is the original DIE that we are searching for a declaration
4737 // for, then don't look in the cache as we don't want our own decl
4738 // context to be our decl context...
4739 if (decl_die != die)
4740 {
4741 switch (die->Tag())
4742 {
4743 case DW_TAG_compile_unit:
4744 case DW_TAG_namespace:
4745 case DW_TAG_structure_type:
4746 case DW_TAG_union_type:
4747 case DW_TAG_class_type:
4748 return die;
4749
4750 default:
4751 break;
4752 }
4753 }
4754
4755 dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
4756 if (die_offset != DW_INVALID_OFFSET)
4757 {
4758 DWARFCompileUnit *spec_cu = cu;
4759 const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
4760 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
4761 if (spec_die_decl_ctx_die)
4762 return spec_die_decl_ctx_die;
4763 }
4764
4765 die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
4766 if (die_offset != DW_INVALID_OFFSET)
4767 {
4768 DWARFCompileUnit *abs_cu = cu;
4769 const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
4770 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
4771 if (abs_die_decl_ctx_die)
4772 return abs_die_decl_ctx_die;
4773 }
4774
4775 die = die->GetParent();
4776 }
4777 }
4778 return NULL;
4779 }
4780
4781
4782 Symbol *
GetObjCClassSymbol(const ConstString & objc_class_name)4783 SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
4784 {
4785 Symbol *objc_class_symbol = NULL;
4786 if (m_obj_file)
4787 {
4788 Symtab *symtab = m_obj_file->GetSymtab ();
4789 if (symtab)
4790 {
4791 objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
4792 eSymbolTypeObjCClass,
4793 Symtab::eDebugNo,
4794 Symtab::eVisibilityAny);
4795 }
4796 }
4797 return objc_class_symbol;
4798 }
4799
4800 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
4801 // then we can end up looking through all class types for a complete type and never find
4802 // the full definition. We need to know if this attribute is supported, so we determine
4803 // this here and cache th result. We also need to worry about the debug map DWARF file
4804 // if we are doing darwin DWARF in .o file debugging.
4805 bool
Supports_DW_AT_APPLE_objc_complete_type(DWARFCompileUnit * cu)4806 SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
4807 {
4808 if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
4809 {
4810 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
4811 if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
4812 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4813 else
4814 {
4815 DWARFDebugInfo* debug_info = DebugInfo();
4816 const uint32_t num_compile_units = GetNumCompileUnits();
4817 for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
4818 {
4819 DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
4820 if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
4821 {
4822 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
4823 break;
4824 }
4825 }
4826 }
4827 if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
4828 return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
4829 }
4830 return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
4831 }
4832
4833 // This function can be used when a DIE is found that is a forward declaration
4834 // DIE and we want to try and find a type that has the complete definition.
4835 TypeSP
FindCompleteObjCDefinitionTypeForDIE(const DWARFDebugInfoEntry * die,const ConstString & type_name,bool must_be_implementation)4836 SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
4837 const ConstString &type_name,
4838 bool must_be_implementation)
4839 {
4840
4841 TypeSP type_sp;
4842
4843 if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
4844 return type_sp;
4845
4846 DIEArray die_offsets;
4847
4848 if (m_using_apple_tables)
4849 {
4850 if (m_apple_types_ap.get())
4851 {
4852 const char *name_cstr = type_name.GetCString();
4853 m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
4854 }
4855 }
4856 else
4857 {
4858 if (!m_indexed)
4859 Index ();
4860
4861 m_type_index.Find (type_name, die_offsets);
4862 }
4863
4864 const size_t num_matches = die_offsets.size();
4865
4866 DWARFCompileUnit* type_cu = NULL;
4867 const DWARFDebugInfoEntry* type_die = NULL;
4868 if (num_matches)
4869 {
4870 DWARFDebugInfo* debug_info = DebugInfo();
4871 for (size_t i=0; i<num_matches; ++i)
4872 {
4873 const dw_offset_t die_offset = die_offsets[i];
4874 type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
4875
4876 if (type_die)
4877 {
4878 bool try_resolving_type = false;
4879
4880 // Don't try and resolve the DIE we are looking for with the DIE itself!
4881 if (type_die != die)
4882 {
4883 switch (type_die->Tag())
4884 {
4885 case DW_TAG_class_type:
4886 case DW_TAG_structure_type:
4887 try_resolving_type = true;
4888 break;
4889 default:
4890 break;
4891 }
4892 }
4893
4894 if (try_resolving_type)
4895 {
4896 if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
4897 try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
4898
4899 if (try_resolving_type)
4900 {
4901 Type *resolved_type = ResolveType (type_cu, type_die, false);
4902 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
4903 {
4904 DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
4905 MakeUserID(die->GetOffset()),
4906 m_obj_file->GetFileSpec().GetFilename().AsCString(),
4907 MakeUserID(type_die->GetOffset()),
4908 MakeUserID(type_cu->GetOffset()));
4909
4910 if (die)
4911 m_die_to_type[die] = resolved_type;
4912 type_sp = resolved_type->shared_from_this();
4913 break;
4914 }
4915 }
4916 }
4917 }
4918 else
4919 {
4920 if (m_using_apple_tables)
4921 {
4922 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
4923 die_offset, type_name.GetCString());
4924 }
4925 }
4926
4927 }
4928 }
4929 return type_sp;
4930 }
4931
4932
4933 //----------------------------------------------------------------------
4934 // This function helps to ensure that the declaration contexts match for
4935 // two different DIEs. Often times debug information will refer to a
4936 // forward declaration of a type (the equivalent of "struct my_struct;".
4937 // There will often be a declaration of that type elsewhere that has the
4938 // full definition. When we go looking for the full type "my_struct", we
4939 // will find one or more matches in the accelerator tables and we will
4940 // then need to make sure the type was in the same declaration context
4941 // as the original DIE. This function can efficiently compare two DIEs
4942 // and will return true when the declaration context matches, and false
4943 // when they don't.
4944 //----------------------------------------------------------------------
4945 bool
DIEDeclContextsMatch(DWARFCompileUnit * cu1,const DWARFDebugInfoEntry * die1,DWARFCompileUnit * cu2,const DWARFDebugInfoEntry * die2)4946 SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
4947 DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
4948 {
4949 if (die1 == die2)
4950 return true;
4951
4952 #if defined (LLDB_CONFIGURATION_DEBUG)
4953 // You can't and shouldn't call this function with a compile unit from
4954 // two different SymbolFileDWARF instances.
4955 assert (DebugInfo()->ContainsCompileUnit (cu1));
4956 assert (DebugInfo()->ContainsCompileUnit (cu2));
4957 #endif
4958
4959 DWARFDIECollection decl_ctx_1;
4960 DWARFDIECollection decl_ctx_2;
4961 //The declaration DIE stack is a stack of the declaration context
4962 // DIEs all the way back to the compile unit. If a type "T" is
4963 // declared inside a class "B", and class "B" is declared inside
4964 // a class "A" and class "A" is in a namespace "lldb", and the
4965 // namespace is in a compile unit, there will be a stack of DIEs:
4966 //
4967 // [0] DW_TAG_class_type for "B"
4968 // [1] DW_TAG_class_type for "A"
4969 // [2] DW_TAG_namespace for "lldb"
4970 // [3] DW_TAG_compile_unit for the source file.
4971 //
4972 // We grab both contexts and make sure that everything matches
4973 // all the way back to the compiler unit.
4974
4975 // First lets grab the decl contexts for both DIEs
4976 die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
4977 die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
4978 // Make sure the context arrays have the same size, otherwise
4979 // we are done
4980 const size_t count1 = decl_ctx_1.Size();
4981 const size_t count2 = decl_ctx_2.Size();
4982 if (count1 != count2)
4983 return false;
4984
4985 // Make sure the DW_TAG values match all the way back up the the
4986 // compile unit. If they don't, then we are done.
4987 const DWARFDebugInfoEntry *decl_ctx_die1;
4988 const DWARFDebugInfoEntry *decl_ctx_die2;
4989 size_t i;
4990 for (i=0; i<count1; i++)
4991 {
4992 decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
4993 decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
4994 if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
4995 return false;
4996 }
4997 #if defined LLDB_CONFIGURATION_DEBUG
4998
4999 // Make sure the top item in the decl context die array is always
5000 // DW_TAG_compile_unit. If it isn't then something went wrong in
5001 // the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
5002 assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
5003
5004 #endif
5005 // Always skip the compile unit when comparing by only iterating up to
5006 // "count - 1". Here we compare the names as we go.
5007 for (i=0; i<count1 - 1; i++)
5008 {
5009 decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
5010 decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
5011 const char *name1 = decl_ctx_die1->GetName(this, cu1);
5012 const char *name2 = decl_ctx_die2->GetName(this, cu2);
5013 // If the string was from a DW_FORM_strp, then the pointer will often
5014 // be the same!
5015 if (name1 == name2)
5016 continue;
5017
5018 // Name pointers are not equal, so only compare the strings
5019 // if both are not NULL.
5020 if (name1 && name2)
5021 {
5022 // If the strings don't compare, we are done...
5023 if (strcmp(name1, name2) != 0)
5024 return false;
5025 }
5026 else
5027 {
5028 // One name was NULL while the other wasn't
5029 return false;
5030 }
5031 }
5032 // We made it through all of the checks and the declaration contexts
5033 // are equal.
5034 return true;
5035 }
5036
5037 // This function can be used when a DIE is found that is a forward declaration
5038 // DIE and we want to try and find a type that has the complete definition.
5039 // "cu" and "die" must be from this SymbolFileDWARF
5040 TypeSP
FindDefinitionTypeForDIE(DWARFCompileUnit * cu,const DWARFDebugInfoEntry * die,const ConstString & type_name)5041 SymbolFileDWARF::FindDefinitionTypeForDIE (DWARFCompileUnit* cu,
5042 const DWARFDebugInfoEntry *die,
5043 const ConstString &type_name)
5044 {
5045 TypeSP type_sp;
5046
5047 #if defined (LLDB_CONFIGURATION_DEBUG)
5048 // You can't and shouldn't call this function with a compile unit from
5049 // another SymbolFileDWARF instance.
5050 assert (DebugInfo()->ContainsCompileUnit (cu));
5051 #endif
5052
5053 if (cu == NULL || die == NULL || !type_name)
5054 return type_sp;
5055
5056 std::string qualified_name;
5057
5058 Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5059 if (log)
5060 {
5061 die->GetQualifiedName(this, cu, qualified_name);
5062 GetObjectFile()->GetModule()->LogMessage (log,
5063 "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x (%s), name='%s')",
5064 die->GetOffset(),
5065 qualified_name.c_str(),
5066 type_name.GetCString());
5067 }
5068
5069 DIEArray die_offsets;
5070
5071 if (m_using_apple_tables)
5072 {
5073 if (m_apple_types_ap.get())
5074 {
5075 const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5076 const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5077 if (has_tag && has_qualified_name_hash)
5078 {
5079 if (qualified_name.empty())
5080 die->GetQualifiedName(this, cu, qualified_name);
5081
5082 const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name.c_str());
5083 if (log)
5084 GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5085 m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), die->Tag(), qualified_name_hash, die_offsets);
5086 }
5087 else if (has_tag > 1)
5088 {
5089 if (log)
5090 GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5091 m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), die->Tag(), die_offsets);
5092 }
5093 else
5094 {
5095 m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5096 }
5097 }
5098 }
5099 else
5100 {
5101 if (!m_indexed)
5102 Index ();
5103
5104 m_type_index.Find (type_name, die_offsets);
5105 }
5106
5107 const size_t num_matches = die_offsets.size();
5108
5109 const dw_tag_t die_tag = die->Tag();
5110
5111 DWARFCompileUnit* type_cu = NULL;
5112 const DWARFDebugInfoEntry* type_die = NULL;
5113 if (num_matches)
5114 {
5115 DWARFDebugInfo* debug_info = DebugInfo();
5116 for (size_t i=0; i<num_matches; ++i)
5117 {
5118 const dw_offset_t die_offset = die_offsets[i];
5119 type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5120
5121 if (type_die)
5122 {
5123 bool try_resolving_type = false;
5124
5125 // Don't try and resolve the DIE we are looking for with the DIE itself!
5126 if (type_die != die)
5127 {
5128 const dw_tag_t type_die_tag = type_die->Tag();
5129 // Make sure the tags match
5130 if (type_die_tag == die_tag)
5131 {
5132 // The tags match, lets try resolving this type
5133 try_resolving_type = true;
5134 }
5135 else
5136 {
5137 // The tags don't match, but we need to watch our for a
5138 // forward declaration for a struct and ("struct foo")
5139 // ends up being a class ("class foo { ... };") or
5140 // vice versa.
5141 switch (type_die_tag)
5142 {
5143 case DW_TAG_class_type:
5144 // We had a "class foo", see if we ended up with a "struct foo { ... };"
5145 try_resolving_type = (die_tag == DW_TAG_structure_type);
5146 break;
5147 case DW_TAG_structure_type:
5148 // We had a "struct foo", see if we ended up with a "class foo { ... };"
5149 try_resolving_type = (die_tag == DW_TAG_class_type);
5150 break;
5151 default:
5152 // Tags don't match, don't event try to resolve
5153 // using this type whose name matches....
5154 break;
5155 }
5156 }
5157 }
5158
5159 if (try_resolving_type)
5160 {
5161 if (log)
5162 {
5163 std::string qualified_name;
5164 type_die->GetQualifiedName(this, cu, qualified_name);
5165 GetObjectFile()->GetModule()->LogMessage (log,
5166 "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') trying die=0x%8.8x (%s)",
5167 die->GetOffset(),
5168 type_name.GetCString(),
5169 type_die->GetOffset(),
5170 qualified_name.c_str());
5171 }
5172
5173 // Make sure the decl contexts match all the way up
5174 if (DIEDeclContextsMatch(cu, die, type_cu, type_die))
5175 {
5176 Type *resolved_type = ResolveType (type_cu, type_die, false);
5177 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5178 {
5179 DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ") from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
5180 MakeUserID(die->GetOffset()),
5181 MakeUserID(cu->GetOffset()),
5182 m_obj_file->GetFileSpec().GetFilename().AsCString(),
5183 MakeUserID(type_die->GetOffset()),
5184 MakeUserID(type_cu->GetOffset()));
5185
5186 m_die_to_type[die] = resolved_type;
5187 type_sp = resolved_type->shared_from_this();
5188 break;
5189 }
5190 }
5191 }
5192 else
5193 {
5194 if (log)
5195 {
5196 std::string qualified_name;
5197 type_die->GetQualifiedName(this, cu, qualified_name);
5198 GetObjectFile()->GetModule()->LogMessage (log,
5199 "SymbolFileDWARF::FindDefinitionTypeForDIE(die=0x%8.8x, name='%s') ignoring die=0x%8.8x (%s)",
5200 die->GetOffset(),
5201 type_name.GetCString(),
5202 type_die->GetOffset(),
5203 qualified_name.c_str());
5204 }
5205 }
5206 }
5207 else
5208 {
5209 if (m_using_apple_tables)
5210 {
5211 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5212 die_offset, type_name.GetCString());
5213 }
5214 }
5215
5216 }
5217 }
5218 return type_sp;
5219 }
5220
5221 TypeSP
FindDefinitionTypeForDWARFDeclContext(const DWARFDeclContext & dwarf_decl_ctx)5222 SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
5223 {
5224 TypeSP type_sp;
5225
5226 const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
5227 if (dwarf_decl_ctx_count > 0)
5228 {
5229 const ConstString type_name(dwarf_decl_ctx[0].name);
5230 const dw_tag_t tag = dwarf_decl_ctx[0].tag;
5231
5232 if (type_name)
5233 {
5234 Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
5235 if (log)
5236 {
5237 GetObjectFile()->GetModule()->LogMessage (log,
5238 "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
5239 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5240 dwarf_decl_ctx.GetQualifiedName());
5241 }
5242
5243 DIEArray die_offsets;
5244
5245 if (m_using_apple_tables)
5246 {
5247 if (m_apple_types_ap.get())
5248 {
5249 const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
5250 const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
5251 if (has_tag && has_qualified_name_hash)
5252 {
5253 const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
5254 const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
5255 if (log)
5256 GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
5257 m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
5258 }
5259 else if (has_tag)
5260 {
5261 if (log)
5262 GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
5263 m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
5264 }
5265 else
5266 {
5267 m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
5268 }
5269 }
5270 }
5271 else
5272 {
5273 if (!m_indexed)
5274 Index ();
5275
5276 m_type_index.Find (type_name, die_offsets);
5277 }
5278
5279 const size_t num_matches = die_offsets.size();
5280
5281
5282 DWARFCompileUnit* type_cu = NULL;
5283 const DWARFDebugInfoEntry* type_die = NULL;
5284 if (num_matches)
5285 {
5286 DWARFDebugInfo* debug_info = DebugInfo();
5287 for (size_t i=0; i<num_matches; ++i)
5288 {
5289 const dw_offset_t die_offset = die_offsets[i];
5290 type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
5291
5292 if (type_die)
5293 {
5294 bool try_resolving_type = false;
5295
5296 // Don't try and resolve the DIE we are looking for with the DIE itself!
5297 const dw_tag_t type_tag = type_die->Tag();
5298 // Make sure the tags match
5299 if (type_tag == tag)
5300 {
5301 // The tags match, lets try resolving this type
5302 try_resolving_type = true;
5303 }
5304 else
5305 {
5306 // The tags don't match, but we need to watch our for a
5307 // forward declaration for a struct and ("struct foo")
5308 // ends up being a class ("class foo { ... };") or
5309 // vice versa.
5310 switch (type_tag)
5311 {
5312 case DW_TAG_class_type:
5313 // We had a "class foo", see if we ended up with a "struct foo { ... };"
5314 try_resolving_type = (tag == DW_TAG_structure_type);
5315 break;
5316 case DW_TAG_structure_type:
5317 // We had a "struct foo", see if we ended up with a "class foo { ... };"
5318 try_resolving_type = (tag == DW_TAG_class_type);
5319 break;
5320 default:
5321 // Tags don't match, don't event try to resolve
5322 // using this type whose name matches....
5323 break;
5324 }
5325 }
5326
5327 if (try_resolving_type)
5328 {
5329 DWARFDeclContext type_dwarf_decl_ctx;
5330 type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
5331
5332 if (log)
5333 {
5334 GetObjectFile()->GetModule()->LogMessage (log,
5335 "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
5336 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5337 dwarf_decl_ctx.GetQualifiedName(),
5338 type_die->GetOffset(),
5339 type_dwarf_decl_ctx.GetQualifiedName());
5340 }
5341
5342 // Make sure the decl contexts match all the way up
5343 if (dwarf_decl_ctx == type_dwarf_decl_ctx)
5344 {
5345 Type *resolved_type = ResolveType (type_cu, type_die, false);
5346 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
5347 {
5348 type_sp = resolved_type->shared_from_this();
5349 break;
5350 }
5351 }
5352 }
5353 else
5354 {
5355 if (log)
5356 {
5357 std::string qualified_name;
5358 type_die->GetQualifiedName(this, type_cu, qualified_name);
5359 GetObjectFile()->GetModule()->LogMessage (log,
5360 "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
5361 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
5362 dwarf_decl_ctx.GetQualifiedName(),
5363 type_die->GetOffset(),
5364 qualified_name.c_str());
5365 }
5366 }
5367 }
5368 else
5369 {
5370 if (m_using_apple_tables)
5371 {
5372 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
5373 die_offset, type_name.GetCString());
5374 }
5375 }
5376
5377 }
5378 }
5379 }
5380 }
5381 return type_sp;
5382 }
5383
5384 bool
CopyUniqueClassMethodTypes(SymbolFileDWARF * src_symfile,Type * class_type,DWARFCompileUnit * src_cu,const DWARFDebugInfoEntry * src_class_die,DWARFCompileUnit * dst_cu,const DWARFDebugInfoEntry * dst_class_die,llvm::SmallVectorImpl<const DWARFDebugInfoEntry * > & failures)5385 SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
5386 Type *class_type,
5387 DWARFCompileUnit* src_cu,
5388 const DWARFDebugInfoEntry *src_class_die,
5389 DWARFCompileUnit* dst_cu,
5390 const DWARFDebugInfoEntry *dst_class_die,
5391 llvm::SmallVectorImpl <const DWARFDebugInfoEntry *> &failures)
5392 {
5393 if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
5394 return false;
5395 if (src_class_die->Tag() != dst_class_die->Tag())
5396 return false;
5397
5398 // We need to complete the class type so we can get all of the method types
5399 // parsed so we can then unique those types to their equivalent counterparts
5400 // in "dst_cu" and "dst_class_die"
5401 class_type->GetClangFullType();
5402
5403 const DWARFDebugInfoEntry *src_die;
5404 const DWARFDebugInfoEntry *dst_die;
5405 UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
5406 UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
5407 UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
5408 UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
5409 for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
5410 {
5411 if (src_die->Tag() == DW_TAG_subprogram)
5412 {
5413 // Make sure this is a declaration and not a concrete instance by looking
5414 // for DW_AT_declaration set to 1. Sometimes concrete function instances
5415 // are placed inside the class definitions and shouldn't be included in
5416 // the list of things are are tracking here.
5417 if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
5418 {
5419 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5420 if (src_name)
5421 {
5422 ConstString src_const_name(src_name);
5423 if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
5424 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
5425 else
5426 src_name_to_die.Append(src_const_name.GetCString(), src_die);
5427 }
5428 }
5429 }
5430 }
5431 for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
5432 {
5433 if (dst_die->Tag() == DW_TAG_subprogram)
5434 {
5435 // Make sure this is a declaration and not a concrete instance by looking
5436 // for DW_AT_declaration set to 1. Sometimes concrete function instances
5437 // are placed inside the class definitions and shouldn't be included in
5438 // the list of things are are tracking here.
5439 if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
5440 {
5441 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5442 if (dst_name)
5443 {
5444 ConstString dst_const_name(dst_name);
5445 if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
5446 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
5447 else
5448 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
5449 }
5450 }
5451 }
5452 }
5453 const uint32_t src_size = src_name_to_die.GetSize ();
5454 const uint32_t dst_size = dst_name_to_die.GetSize ();
5455 Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
5456
5457 // Is everything kosher so we can go through the members at top speed?
5458 bool fast_path = true;
5459
5460 if (src_size != dst_size)
5461 {
5462 if (src_size != 0 && dst_size != 0)
5463 {
5464 if (log)
5465 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)",
5466 src_class_die->GetOffset(),
5467 dst_class_die->GetOffset(),
5468 src_size,
5469 dst_size);
5470 }
5471
5472 fast_path = false;
5473 }
5474
5475 uint32_t idx;
5476
5477 if (fast_path)
5478 {
5479 for (idx = 0; idx < src_size; ++idx)
5480 {
5481 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5482 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5483
5484 if (src_die->Tag() != dst_die->Tag())
5485 {
5486 if (log)
5487 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
5488 src_class_die->GetOffset(),
5489 dst_class_die->GetOffset(),
5490 src_die->GetOffset(),
5491 DW_TAG_value_to_name(src_die->Tag()),
5492 dst_die->GetOffset(),
5493 DW_TAG_value_to_name(src_die->Tag()));
5494 fast_path = false;
5495 }
5496
5497 const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
5498 const char *dst_name = dst_die->GetMangledName (this, dst_cu);
5499
5500 // Make sure the names match
5501 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
5502 continue;
5503
5504 if (log)
5505 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
5506 src_class_die->GetOffset(),
5507 dst_class_die->GetOffset(),
5508 src_die->GetOffset(),
5509 src_name,
5510 dst_die->GetOffset(),
5511 dst_name);
5512
5513 fast_path = false;
5514 }
5515 }
5516
5517 // Now do the work of linking the DeclContexts and Types.
5518 if (fast_path)
5519 {
5520 // We can do this quickly. Just run across the tables index-for-index since
5521 // we know each node has matching names and tags.
5522 for (idx = 0; idx < src_size; ++idx)
5523 {
5524 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
5525 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
5526
5527 clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5528 if (src_decl_ctx)
5529 {
5530 if (log)
5531 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5532 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5533 }
5534 else
5535 {
5536 if (log)
5537 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5538 }
5539
5540 Type *src_child_type = m_die_to_type[src_die];
5541 if (src_child_type)
5542 {
5543 if (log)
5544 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5545 m_die_to_type[dst_die] = src_child_type;
5546 }
5547 else
5548 {
5549 if (log)
5550 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5551 }
5552 }
5553 }
5554 else
5555 {
5556 // We must do this slowly. For each member of the destination, look
5557 // up a member in the source with the same name, check its tag, and
5558 // unique them if everything matches up. Report failures.
5559
5560 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
5561 {
5562 src_name_to_die.Sort();
5563
5564 for (idx = 0; idx < dst_size; ++idx)
5565 {
5566 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
5567 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
5568 src_die = src_name_to_die.Find(dst_name, NULL);
5569
5570 if (src_die && (src_die->Tag() == dst_die->Tag()))
5571 {
5572 clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
5573 if (src_decl_ctx)
5574 {
5575 if (log)
5576 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5577 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5578 }
5579 else
5580 {
5581 if (log)
5582 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5583 }
5584
5585 Type *src_child_type = m_die_to_type[src_die];
5586 if (src_child_type)
5587 {
5588 if (log)
5589 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5590 m_die_to_type[dst_die] = src_child_type;
5591 }
5592 else
5593 {
5594 if (log)
5595 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5596 }
5597 }
5598 else
5599 {
5600 if (log)
5601 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
5602
5603 failures.push_back(dst_die);
5604 }
5605 }
5606 }
5607 }
5608
5609 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
5610 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
5611
5612 UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
5613
5614 if (src_size_artificial && dst_size_artificial)
5615 {
5616 dst_name_to_die_artificial.Sort();
5617
5618 for (idx = 0; idx < src_size_artificial; ++idx)
5619 {
5620 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
5621 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5622 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
5623
5624 if (dst_die)
5625 {
5626 // Both classes have the artificial types, link them
5627 clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
5628 if (src_decl_ctx)
5629 {
5630 if (log)
5631 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", src_decl_ctx, src_die->GetOffset(), dst_die->GetOffset());
5632 LinkDeclContextToDIE (src_decl_ctx, dst_die);
5633 }
5634 else
5635 {
5636 if (log)
5637 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5638 }
5639
5640 Type *src_child_type = m_die_to_type[src_die];
5641 if (src_child_type)
5642 {
5643 if (log)
5644 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", src_child_type, src_child_type->GetID(), src_die->GetOffset(), dst_die->GetOffset());
5645 m_die_to_type[dst_die] = src_child_type;
5646 }
5647 else
5648 {
5649 if (log)
5650 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
5651 }
5652 }
5653 }
5654 }
5655
5656 if (dst_size_artificial)
5657 {
5658 for (idx = 0; idx < dst_size_artificial; ++idx)
5659 {
5660 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
5661 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
5662 if (log)
5663 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
5664
5665 failures.push_back(dst_die);
5666 }
5667 }
5668
5669 return (failures.size() != 0);
5670 }
5671
5672 TypeSP
ParseType(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,bool * type_is_new_ptr)5673 SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
5674 {
5675 TypeSP type_sp;
5676
5677 if (type_is_new_ptr)
5678 *type_is_new_ptr = false;
5679
5680 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5681 static DIEStack g_die_stack;
5682 DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
5683 #endif
5684
5685 AccessType accessibility = eAccessNone;
5686 if (die != NULL)
5687 {
5688 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5689 if (log)
5690 {
5691 const DWARFDebugInfoEntry *context_die;
5692 clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
5693
5694 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
5695 die->GetOffset(),
5696 context,
5697 context_die->GetOffset(),
5698 DW_TAG_value_to_name(die->Tag()),
5699 die->GetName(this, dwarf_cu));
5700
5701 #if defined(LLDB_CONFIGURATION_DEBUG) or defined(LLDB_CONFIGURATION_RELEASE)
5702 scoped_die_logger.Push (dwarf_cu, die);
5703 g_die_stack.LogDIEs(log, this);
5704 #endif
5705 }
5706 //
5707 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
5708 // if (log && dwarf_cu)
5709 // {
5710 // StreamString s;
5711 // die->DumpLocation (this, dwarf_cu, s);
5712 // GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
5713 //
5714 // }
5715
5716 Type *type_ptr = m_die_to_type.lookup (die);
5717 TypeList* type_list = GetTypeList();
5718 if (type_ptr == NULL)
5719 {
5720 ClangASTContext &ast = GetClangASTContext();
5721 if (type_is_new_ptr)
5722 *type_is_new_ptr = true;
5723
5724 const dw_tag_t tag = die->Tag();
5725
5726 bool is_forward_declaration = false;
5727 DWARFDebugInfoEntry::Attributes attributes;
5728 const char *type_name_cstr = NULL;
5729 ConstString type_name_const_str;
5730 Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
5731 uint64_t byte_size = 0;
5732 Declaration decl;
5733
5734 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
5735 ClangASTType clang_type;
5736
5737 dw_attr_t attr;
5738
5739 switch (tag)
5740 {
5741 case DW_TAG_base_type:
5742 case DW_TAG_pointer_type:
5743 case DW_TAG_reference_type:
5744 case DW_TAG_rvalue_reference_type:
5745 case DW_TAG_typedef:
5746 case DW_TAG_const_type:
5747 case DW_TAG_restrict_type:
5748 case DW_TAG_volatile_type:
5749 case DW_TAG_unspecified_type:
5750 {
5751 // Set a bit that lets us know that we are currently parsing this
5752 m_die_to_type[die] = DIE_IS_BEING_PARSED;
5753
5754 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5755 uint32_t encoding = 0;
5756 lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
5757
5758 if (num_attributes > 0)
5759 {
5760 uint32_t i;
5761 for (i=0; i<num_attributes; ++i)
5762 {
5763 attr = attributes.AttributeAtIndex(i);
5764 DWARFFormValue form_value;
5765 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5766 {
5767 switch (attr)
5768 {
5769 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
5770 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
5771 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
5772 case DW_AT_name:
5773
5774 type_name_cstr = form_value.AsCString(&get_debug_str_data());
5775 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
5776 // include the "&"...
5777 if (tag == DW_TAG_reference_type)
5778 {
5779 if (strchr (type_name_cstr, '&') == NULL)
5780 type_name_cstr = NULL;
5781 }
5782 if (type_name_cstr)
5783 type_name_const_str.SetCString(type_name_cstr);
5784 break;
5785 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
5786 case DW_AT_encoding: encoding = form_value.Unsigned(); break;
5787 case DW_AT_type: encoding_uid = form_value.Reference(dwarf_cu); break;
5788 default:
5789 case DW_AT_sibling:
5790 break;
5791 }
5792 }
5793 }
5794 }
5795
5796 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
5797
5798 switch (tag)
5799 {
5800 default:
5801 break;
5802
5803 case DW_TAG_unspecified_type:
5804 if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
5805 strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
5806 {
5807 resolve_state = Type::eResolveStateFull;
5808 clang_type = ast.GetBasicType(eBasicTypeNullPtr);
5809 break;
5810 }
5811 // Fall through to base type below in case we can handle the type there...
5812
5813 case DW_TAG_base_type:
5814 resolve_state = Type::eResolveStateFull;
5815 clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
5816 encoding,
5817 byte_size * 8);
5818 break;
5819
5820 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break;
5821 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break;
5822 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break;
5823 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break;
5824 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break;
5825 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break;
5826 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break;
5827 }
5828
5829 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
5830 {
5831 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
5832
5833 if (translation_unit_is_objc)
5834 {
5835 if (type_name_cstr != NULL)
5836 {
5837 static ConstString g_objc_type_name_id("id");
5838 static ConstString g_objc_type_name_Class("Class");
5839 static ConstString g_objc_type_name_selector("SEL");
5840
5841 if (type_name_const_str == g_objc_type_name_id)
5842 {
5843 if (log)
5844 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
5845 die->GetOffset(),
5846 DW_TAG_value_to_name(die->Tag()),
5847 die->GetName(this, dwarf_cu));
5848 clang_type = ast.GetBasicType(eBasicTypeObjCID);
5849 encoding_data_type = Type::eEncodingIsUID;
5850 encoding_uid = LLDB_INVALID_UID;
5851 resolve_state = Type::eResolveStateFull;
5852
5853 }
5854 else if (type_name_const_str == g_objc_type_name_Class)
5855 {
5856 if (log)
5857 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
5858 die->GetOffset(),
5859 DW_TAG_value_to_name(die->Tag()),
5860 die->GetName(this, dwarf_cu));
5861 clang_type = ast.GetBasicType(eBasicTypeObjCClass);
5862 encoding_data_type = Type::eEncodingIsUID;
5863 encoding_uid = LLDB_INVALID_UID;
5864 resolve_state = Type::eResolveStateFull;
5865 }
5866 else if (type_name_const_str == g_objc_type_name_selector)
5867 {
5868 if (log)
5869 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
5870 die->GetOffset(),
5871 DW_TAG_value_to_name(die->Tag()),
5872 die->GetName(this, dwarf_cu));
5873 clang_type = ast.GetBasicType(eBasicTypeObjCSel);
5874 encoding_data_type = Type::eEncodingIsUID;
5875 encoding_uid = LLDB_INVALID_UID;
5876 resolve_state = Type::eResolveStateFull;
5877 }
5878 }
5879 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
5880 {
5881 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id".
5882
5883 DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
5884
5885 if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
5886 {
5887 if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
5888 {
5889 if (!strcmp(struct_name, "objc_object"))
5890 {
5891 if (log)
5892 GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
5893 die->GetOffset(),
5894 DW_TAG_value_to_name(die->Tag()),
5895 die->GetName(this, dwarf_cu));
5896 clang_type = ast.GetBasicType(eBasicTypeObjCID);
5897 encoding_data_type = Type::eEncodingIsUID;
5898 encoding_uid = LLDB_INVALID_UID;
5899 resolve_state = Type::eResolveStateFull;
5900 }
5901 }
5902 }
5903 }
5904 }
5905 }
5906
5907 type_sp.reset( new Type (MakeUserID(die->GetOffset()),
5908 this,
5909 type_name_const_str,
5910 byte_size,
5911 NULL,
5912 encoding_uid,
5913 encoding_data_type,
5914 &decl,
5915 clang_type,
5916 resolve_state));
5917
5918 m_die_to_type[die] = type_sp.get();
5919
5920 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
5921 // if (encoding_type != NULL)
5922 // {
5923 // if (encoding_type != DIE_IS_BEING_PARSED)
5924 // type_sp->SetEncodingType(encoding_type);
5925 // else
5926 // m_indirect_fixups.push_back(type_sp.get());
5927 // }
5928 }
5929 break;
5930
5931 case DW_TAG_structure_type:
5932 case DW_TAG_union_type:
5933 case DW_TAG_class_type:
5934 {
5935 // Set a bit that lets us know that we are currently parsing this
5936 m_die_to_type[die] = DIE_IS_BEING_PARSED;
5937 bool byte_size_valid = false;
5938
5939 LanguageType class_language = eLanguageTypeUnknown;
5940 bool is_complete_objc_class = false;
5941 //bool struct_is_class = false;
5942 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
5943 if (num_attributes > 0)
5944 {
5945 uint32_t i;
5946 for (i=0; i<num_attributes; ++i)
5947 {
5948 attr = attributes.AttributeAtIndex(i);
5949 DWARFFormValue form_value;
5950 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
5951 {
5952 switch (attr)
5953 {
5954 case DW_AT_decl_file:
5955 if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
5956 {
5957 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always
5958 // point to the compile unit file, so we clear this invalid value
5959 // so that we can still unique types efficiently.
5960 decl.SetFile(FileSpec ("<invalid>", false));
5961 }
5962 else
5963 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
5964 break;
5965
5966 case DW_AT_decl_line:
5967 decl.SetLine(form_value.Unsigned());
5968 break;
5969
5970 case DW_AT_decl_column:
5971 decl.SetColumn(form_value.Unsigned());
5972 break;
5973
5974 case DW_AT_name:
5975 type_name_cstr = form_value.AsCString(&get_debug_str_data());
5976 type_name_const_str.SetCString(type_name_cstr);
5977 break;
5978
5979 case DW_AT_byte_size:
5980 byte_size = form_value.Unsigned();
5981 byte_size_valid = true;
5982 break;
5983
5984 case DW_AT_accessibility:
5985 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
5986 break;
5987
5988 case DW_AT_declaration:
5989 is_forward_declaration = form_value.Boolean();
5990 break;
5991
5992 case DW_AT_APPLE_runtime_class:
5993 class_language = (LanguageType)form_value.Signed();
5994 break;
5995
5996 case DW_AT_APPLE_objc_complete_type:
5997 is_complete_objc_class = form_value.Signed();
5998 break;
5999
6000 case DW_AT_allocated:
6001 case DW_AT_associated:
6002 case DW_AT_data_location:
6003 case DW_AT_description:
6004 case DW_AT_start_scope:
6005 case DW_AT_visibility:
6006 default:
6007 case DW_AT_sibling:
6008 break;
6009 }
6010 }
6011 }
6012 }
6013
6014 UniqueDWARFASTType unique_ast_entry;
6015
6016 // Only try and unique the type if it has a name.
6017 if (type_name_const_str &&
6018 GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
6019 this,
6020 dwarf_cu,
6021 die,
6022 decl,
6023 byte_size_valid ? byte_size : -1,
6024 unique_ast_entry))
6025 {
6026 // We have already parsed this type or from another
6027 // compile unit. GCC loves to use the "one definition
6028 // rule" which can result in multiple definitions
6029 // of the same class over and over in each compile
6030 // unit.
6031 type_sp = unique_ast_entry.m_type_sp;
6032 if (type_sp)
6033 {
6034 m_die_to_type[die] = type_sp.get();
6035 return type_sp;
6036 }
6037 }
6038
6039 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6040
6041 int tag_decl_kind = -1;
6042 AccessType default_accessibility = eAccessNone;
6043 if (tag == DW_TAG_structure_type)
6044 {
6045 tag_decl_kind = clang::TTK_Struct;
6046 default_accessibility = eAccessPublic;
6047 }
6048 else if (tag == DW_TAG_union_type)
6049 {
6050 tag_decl_kind = clang::TTK_Union;
6051 default_accessibility = eAccessPublic;
6052 }
6053 else if (tag == DW_TAG_class_type)
6054 {
6055 tag_decl_kind = clang::TTK_Class;
6056 default_accessibility = eAccessPrivate;
6057 }
6058
6059 if (byte_size_valid && byte_size == 0 && type_name_cstr &&
6060 die->HasChildren() == false &&
6061 sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
6062 {
6063 // Work around an issue with clang at the moment where
6064 // forward declarations for objective C classes are emitted
6065 // as:
6066 // DW_TAG_structure_type [2]
6067 // DW_AT_name( "ForwardObjcClass" )
6068 // DW_AT_byte_size( 0x00 )
6069 // DW_AT_decl_file( "..." )
6070 // DW_AT_decl_line( 1 )
6071 //
6072 // Note that there is no DW_AT_declaration and there are
6073 // no children, and the byte size is zero.
6074 is_forward_declaration = true;
6075 }
6076
6077 if (class_language == eLanguageTypeObjC ||
6078 class_language == eLanguageTypeObjC_plus_plus)
6079 {
6080 if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
6081 {
6082 // We have a valid eSymbolTypeObjCClass class symbol whose
6083 // name matches the current objective C class that we
6084 // are trying to find and this DIE isn't the complete
6085 // definition (we checked is_complete_objc_class above and
6086 // know it is false), so the real definition is in here somewhere
6087 type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6088
6089 if (!type_sp && GetDebugMapSymfile ())
6090 {
6091 // We weren't able to find a full declaration in
6092 // this DWARF, see if we have a declaration anywhere
6093 // else...
6094 type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
6095 }
6096
6097 if (type_sp)
6098 {
6099 if (log)
6100 {
6101 GetObjectFile()->GetModule()->LogMessage (log,
6102 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
6103 this,
6104 die->GetOffset(),
6105 DW_TAG_value_to_name(tag),
6106 type_name_cstr,
6107 type_sp->GetID());
6108 }
6109
6110 // We found a real definition for this type elsewhere
6111 // so lets use it and cache the fact that we found
6112 // a complete type for this die
6113 m_die_to_type[die] = type_sp.get();
6114 return type_sp;
6115 }
6116 }
6117 }
6118
6119
6120 if (is_forward_declaration)
6121 {
6122 // We have a forward declaration to a type and we need
6123 // to try and find a full declaration. We look in the
6124 // current type index just in case we have a forward
6125 // declaration followed by an actual declarations in the
6126 // DWARF. If this fails, we need to look elsewhere...
6127 if (log)
6128 {
6129 GetObjectFile()->GetModule()->LogMessage (log,
6130 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
6131 this,
6132 die->GetOffset(),
6133 DW_TAG_value_to_name(tag),
6134 type_name_cstr);
6135 }
6136
6137 DWARFDeclContext die_decl_ctx;
6138 die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
6139
6140 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
6141 type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6142
6143 if (!type_sp && GetDebugMapSymfile ())
6144 {
6145 // We weren't able to find a full declaration in
6146 // this DWARF, see if we have a declaration anywhere
6147 // else...
6148 type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
6149 }
6150
6151 if (type_sp)
6152 {
6153 if (log)
6154 {
6155 GetObjectFile()->GetModule()->LogMessage (log,
6156 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
6157 this,
6158 die->GetOffset(),
6159 DW_TAG_value_to_name(tag),
6160 type_name_cstr,
6161 type_sp->GetID());
6162 }
6163
6164 // We found a real definition for this type elsewhere
6165 // so lets use it and cache the fact that we found
6166 // a complete type for this die
6167 m_die_to_type[die] = type_sp.get();
6168 return type_sp;
6169 }
6170 }
6171 assert (tag_decl_kind != -1);
6172 bool clang_type_was_created = false;
6173 clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6174 if (!clang_type)
6175 {
6176 const DWARFDebugInfoEntry *decl_ctx_die;
6177
6178 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6179 if (accessibility == eAccessNone && decl_ctx)
6180 {
6181 // Check the decl context that contains this class/struct/union.
6182 // If it is a class we must give it an accessability.
6183 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
6184 if (DeclKindIsCXXClass (containing_decl_kind))
6185 accessibility = default_accessibility;
6186 }
6187
6188 ClangASTMetadata metadata;
6189 metadata.SetUserID(MakeUserID(die->GetOffset()));
6190 metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
6191
6192 if (type_name_cstr && strchr (type_name_cstr, '<'))
6193 {
6194 ClangASTContext::TemplateParameterInfos template_param_infos;
6195 if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
6196 {
6197 clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
6198 accessibility,
6199 type_name_cstr,
6200 tag_decl_kind,
6201 template_param_infos);
6202
6203 clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
6204 class_template_decl,
6205 tag_decl_kind,
6206 template_param_infos);
6207 clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
6208 clang_type_was_created = true;
6209
6210 GetClangASTContext().SetMetadata (class_template_decl, metadata);
6211 GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
6212 }
6213 }
6214
6215 if (!clang_type_was_created)
6216 {
6217 clang_type_was_created = true;
6218 clang_type = ast.CreateRecordType (decl_ctx,
6219 accessibility,
6220 type_name_cstr,
6221 tag_decl_kind,
6222 class_language,
6223 &metadata);
6224 }
6225 }
6226
6227 // Store a forward declaration to this class type in case any
6228 // parameters in any class methods need it for the clang
6229 // types for function prototypes.
6230 LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6231 type_sp.reset (new Type (MakeUserID(die->GetOffset()),
6232 this,
6233 type_name_const_str,
6234 byte_size,
6235 NULL,
6236 LLDB_INVALID_UID,
6237 Type::eEncodingIsUID,
6238 &decl,
6239 clang_type,
6240 Type::eResolveStateForward));
6241
6242 type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
6243
6244
6245 // Add our type to the unique type map so we don't
6246 // end up creating many copies of the same type over
6247 // and over in the ASTContext for our module
6248 unique_ast_entry.m_type_sp = type_sp;
6249 unique_ast_entry.m_symfile = this;
6250 unique_ast_entry.m_cu = dwarf_cu;
6251 unique_ast_entry.m_die = die;
6252 unique_ast_entry.m_declaration = decl;
6253 unique_ast_entry.m_byte_size = byte_size;
6254 GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
6255 unique_ast_entry);
6256
6257 if (is_forward_declaration && die->HasChildren())
6258 {
6259 // Check to see if the DIE actually has a definition, some version of GCC will
6260 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
6261 // members, or inheritance, so we can't trust it
6262 const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
6263 while (child_die)
6264 {
6265 switch (child_die->Tag())
6266 {
6267 case DW_TAG_inheritance:
6268 case DW_TAG_subprogram:
6269 case DW_TAG_member:
6270 case DW_TAG_APPLE_property:
6271 case DW_TAG_class_type:
6272 case DW_TAG_structure_type:
6273 case DW_TAG_enumeration_type:
6274 case DW_TAG_typedef:
6275 case DW_TAG_union_type:
6276 child_die = NULL;
6277 is_forward_declaration = false;
6278 break;
6279 default:
6280 child_die = child_die->GetSibling();
6281 break;
6282 }
6283 }
6284 }
6285
6286 if (!is_forward_declaration)
6287 {
6288 // Always start the definition for a class type so that
6289 // if the class has child classes or types that require
6290 // the class to be created for use as their decl contexts
6291 // the class will be ready to accept these child definitions.
6292 if (die->HasChildren() == false)
6293 {
6294 // No children for this struct/union/class, lets finish it
6295 clang_type.StartTagDeclarationDefinition ();
6296 clang_type.CompleteTagDeclarationDefinition ();
6297
6298 if (tag == DW_TAG_structure_type) // this only applies in C
6299 {
6300 clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
6301
6302 if (record_decl)
6303 {
6304 LayoutInfo layout_info;
6305
6306 layout_info.alignment = 0;
6307 layout_info.bit_size = 0;
6308
6309 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
6310 }
6311 }
6312 }
6313 else if (clang_type_was_created)
6314 {
6315 // Start the definition if the class is not objective C since
6316 // the underlying decls respond to isCompleteDefinition(). Objective
6317 // C decls dont' respond to isCompleteDefinition() so we can't
6318 // start the declaration definition right away. For C++ classs/union/structs
6319 // we want to start the definition in case the class is needed as the
6320 // declaration context for a contained class or type without the need
6321 // to complete that type..
6322
6323 if (class_language != eLanguageTypeObjC &&
6324 class_language != eLanguageTypeObjC_plus_plus)
6325 clang_type.StartTagDeclarationDefinition ();
6326
6327 // Leave this as a forward declaration until we need
6328 // to know the details of the type. lldb_private::Type
6329 // will automatically call the SymbolFile virtual function
6330 // "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
6331 // When the definition needs to be defined.
6332 m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
6333 m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
6334 clang_type.SetHasExternalStorage (true);
6335 }
6336 }
6337
6338 }
6339 break;
6340
6341 case DW_TAG_enumeration_type:
6342 {
6343 // Set a bit that lets us know that we are currently parsing this
6344 m_die_to_type[die] = DIE_IS_BEING_PARSED;
6345
6346 lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
6347
6348 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6349 if (num_attributes > 0)
6350 {
6351 uint32_t i;
6352
6353 for (i=0; i<num_attributes; ++i)
6354 {
6355 attr = attributes.AttributeAtIndex(i);
6356 DWARFFormValue form_value;
6357 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6358 {
6359 switch (attr)
6360 {
6361 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6362 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
6363 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6364 case DW_AT_name:
6365 type_name_cstr = form_value.AsCString(&get_debug_str_data());
6366 type_name_const_str.SetCString(type_name_cstr);
6367 break;
6368 case DW_AT_type: encoding_uid = form_value.Reference(dwarf_cu); break;
6369 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
6370 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6371 case DW_AT_declaration: break; //is_forward_declaration = form_value.Boolean(); break;
6372 case DW_AT_allocated:
6373 case DW_AT_associated:
6374 case DW_AT_bit_stride:
6375 case DW_AT_byte_stride:
6376 case DW_AT_data_location:
6377 case DW_AT_description:
6378 case DW_AT_start_scope:
6379 case DW_AT_visibility:
6380 case DW_AT_specification:
6381 case DW_AT_abstract_origin:
6382 case DW_AT_sibling:
6383 break;
6384 }
6385 }
6386 }
6387
6388 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6389
6390 ClangASTType enumerator_clang_type;
6391 clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
6392 if (!clang_type)
6393 {
6394 if (encoding_uid != DW_INVALID_OFFSET)
6395 {
6396 Type *enumerator_type = ResolveTypeUID(encoding_uid);
6397 if (enumerator_type)
6398 enumerator_clang_type = enumerator_type->GetClangFullType();
6399 }
6400
6401 if (!enumerator_clang_type)
6402 enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
6403 DW_ATE_signed,
6404 byte_size * 8);
6405
6406 clang_type = ast.CreateEnumerationType (type_name_cstr,
6407 GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
6408 decl,
6409 enumerator_clang_type);
6410 }
6411 else
6412 {
6413 enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
6414 }
6415
6416 LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
6417
6418 type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6419 this,
6420 type_name_const_str,
6421 byte_size,
6422 NULL,
6423 encoding_uid,
6424 Type::eEncodingIsUID,
6425 &decl,
6426 clang_type,
6427 Type::eResolveStateForward));
6428
6429 clang_type.StartTagDeclarationDefinition ();
6430 if (die->HasChildren())
6431 {
6432 SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
6433 bool is_signed = false;
6434 enumerator_clang_type.IsIntegerType(is_signed);
6435 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
6436 }
6437 clang_type.CompleteTagDeclarationDefinition ();
6438 }
6439 }
6440 break;
6441
6442 case DW_TAG_inlined_subroutine:
6443 case DW_TAG_subprogram:
6444 case DW_TAG_subroutine_type:
6445 {
6446 // Set a bit that lets us know that we are currently parsing this
6447 m_die_to_type[die] = DIE_IS_BEING_PARSED;
6448
6449 //const char *mangled = NULL;
6450 dw_offset_t type_die_offset = DW_INVALID_OFFSET;
6451 bool is_variadic = false;
6452 bool is_inline = false;
6453 bool is_static = false;
6454 bool is_virtual = false;
6455 bool is_explicit = false;
6456 bool is_artificial = false;
6457 dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
6458 dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
6459 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
6460
6461 unsigned type_quals = 0;
6462 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
6463
6464
6465 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6466 if (num_attributes > 0)
6467 {
6468 uint32_t i;
6469 for (i=0; i<num_attributes; ++i)
6470 {
6471 attr = attributes.AttributeAtIndex(i);
6472 DWARFFormValue form_value;
6473 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6474 {
6475 switch (attr)
6476 {
6477 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6478 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
6479 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6480 case DW_AT_name:
6481 type_name_cstr = form_value.AsCString(&get_debug_str_data());
6482 type_name_const_str.SetCString(type_name_cstr);
6483 break;
6484
6485 case DW_AT_linkage_name:
6486 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
6487 case DW_AT_type: type_die_offset = form_value.Reference(dwarf_cu); break;
6488 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6489 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break;
6490 case DW_AT_inline: is_inline = form_value.Boolean(); break;
6491 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break;
6492 case DW_AT_explicit: is_explicit = form_value.Boolean(); break;
6493 case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
6494
6495
6496 case DW_AT_external:
6497 if (form_value.Unsigned())
6498 {
6499 if (storage == clang::SC_None)
6500 storage = clang::SC_Extern;
6501 else
6502 storage = clang::SC_PrivateExtern;
6503 }
6504 break;
6505
6506 case DW_AT_specification:
6507 specification_die_offset = form_value.Reference(dwarf_cu);
6508 break;
6509
6510 case DW_AT_abstract_origin:
6511 abstract_origin_die_offset = form_value.Reference(dwarf_cu);
6512 break;
6513
6514 case DW_AT_object_pointer:
6515 object_pointer_die_offset = form_value.Reference(dwarf_cu);
6516 break;
6517
6518 case DW_AT_allocated:
6519 case DW_AT_associated:
6520 case DW_AT_address_class:
6521 case DW_AT_calling_convention:
6522 case DW_AT_data_location:
6523 case DW_AT_elemental:
6524 case DW_AT_entry_pc:
6525 case DW_AT_frame_base:
6526 case DW_AT_high_pc:
6527 case DW_AT_low_pc:
6528 case DW_AT_prototyped:
6529 case DW_AT_pure:
6530 case DW_AT_ranges:
6531 case DW_AT_recursive:
6532 case DW_AT_return_addr:
6533 case DW_AT_segment:
6534 case DW_AT_start_scope:
6535 case DW_AT_static_link:
6536 case DW_AT_trampoline:
6537 case DW_AT_visibility:
6538 case DW_AT_vtable_elem_location:
6539 case DW_AT_description:
6540 case DW_AT_sibling:
6541 break;
6542 }
6543 }
6544 }
6545 }
6546
6547 std::string object_pointer_name;
6548 if (object_pointer_die_offset != DW_INVALID_OFFSET)
6549 {
6550 // Get the name from the object pointer die
6551 StreamString s;
6552 if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
6553 {
6554 object_pointer_name.assign(s.GetData());
6555 }
6556 }
6557
6558 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6559
6560 ClangASTType return_clang_type;
6561 Type *func_type = NULL;
6562
6563 if (type_die_offset != DW_INVALID_OFFSET)
6564 func_type = ResolveTypeUID(type_die_offset);
6565
6566 if (func_type)
6567 return_clang_type = func_type->GetClangForwardType();
6568 else
6569 return_clang_type = ast.GetBasicType(eBasicTypeVoid);
6570
6571
6572 std::vector<ClangASTType> function_param_types;
6573 std::vector<clang::ParmVarDecl*> function_param_decls;
6574
6575 // Parse the function children for the parameters
6576
6577 const DWARFDebugInfoEntry *decl_ctx_die = NULL;
6578 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
6579 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
6580
6581 const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
6582 // Start off static. This will be set to false in ParseChildParameters(...)
6583 // if we find a "this" paramters as the first parameter
6584 if (is_cxx_method)
6585 is_static = true;
6586 ClangASTContext::TemplateParameterInfos template_param_infos;
6587
6588 if (die->HasChildren())
6589 {
6590 bool skip_artificial = true;
6591 ParseChildParameters (sc,
6592 containing_decl_ctx,
6593 dwarf_cu,
6594 die,
6595 skip_artificial,
6596 is_static,
6597 is_variadic,
6598 type_list,
6599 function_param_types,
6600 function_param_decls,
6601 type_quals,
6602 template_param_infos);
6603 }
6604
6605 // clang_type will get the function prototype clang type after this call
6606 clang_type = ast.CreateFunctionType (return_clang_type,
6607 function_param_types.data(),
6608 function_param_types.size(),
6609 is_variadic,
6610 type_quals);
6611
6612 bool ignore_containing_context = false;
6613
6614 if (type_name_cstr)
6615 {
6616 bool type_handled = false;
6617 if (tag == DW_TAG_subprogram)
6618 {
6619 ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
6620 if (objc_method.IsValid(true))
6621 {
6622 SymbolContext empty_sc;
6623 ClangASTType class_opaque_type;
6624 ConstString class_name(objc_method.GetClassName());
6625 if (class_name)
6626 {
6627 TypeList types;
6628 TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
6629
6630 if (complete_objc_class_type_sp)
6631 {
6632 ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
6633 if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
6634 class_opaque_type = type_clang_forward_type;
6635 }
6636 }
6637
6638 if (class_opaque_type)
6639 {
6640 // If accessibility isn't set to anything valid, assume public for
6641 // now...
6642 if (accessibility == eAccessNone)
6643 accessibility = eAccessPublic;
6644
6645 clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
6646 clang_type,
6647 accessibility,
6648 is_artificial);
6649 type_handled = objc_method_decl != NULL;
6650 if (type_handled)
6651 {
6652 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
6653 GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
6654 }
6655 else
6656 {
6657 GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
6658 die->GetOffset(),
6659 tag,
6660 DW_TAG_value_to_name(tag));
6661 }
6662 }
6663 }
6664 else if (is_cxx_method)
6665 {
6666 // Look at the parent of this DIE and see if is is
6667 // a class or struct and see if this is actually a
6668 // C++ method
6669 Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
6670 if (class_type)
6671 {
6672 if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
6673 {
6674 // We uniqued the parent class of this function to another class
6675 // so we now need to associate all dies under "decl_ctx_die" to
6676 // DIEs in the DIE for "class_type"...
6677 SymbolFileDWARF *class_symfile = NULL;
6678 DWARFCompileUnitSP class_type_cu_sp;
6679 const DWARFDebugInfoEntry *class_type_die = NULL;
6680
6681 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
6682 if (debug_map_symfile)
6683 {
6684 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
6685 class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6686 }
6687 else
6688 {
6689 class_symfile = this;
6690 class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
6691 }
6692 if (class_type_die)
6693 {
6694 llvm::SmallVector<const DWARFDebugInfoEntry *, 0> failures;
6695
6696 CopyUniqueClassMethodTypes (class_symfile,
6697 class_type,
6698 class_type_cu_sp.get(),
6699 class_type_die,
6700 dwarf_cu,
6701 decl_ctx_die,
6702 failures);
6703
6704 // FIXME do something with these failures that's smarter than
6705 // just dropping them on the ground. Unfortunately classes don't
6706 // like having stuff added to them after their definitions are
6707 // complete...
6708
6709 type_ptr = m_die_to_type[die];
6710 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6711 {
6712 type_sp = type_ptr->shared_from_this();
6713 break;
6714 }
6715 }
6716 }
6717
6718 if (specification_die_offset != DW_INVALID_OFFSET)
6719 {
6720 // We have a specification which we are going to base our function
6721 // prototype off of, so we need this type to be completed so that the
6722 // m_die_to_decl_ctx for the method in the specification has a valid
6723 // clang decl context.
6724 class_type->GetClangForwardType();
6725 // If we have a specification, then the function type should have been
6726 // made with the specification and not with this die.
6727 DWARFCompileUnitSP spec_cu_sp;
6728 const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
6729 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
6730 if (spec_clang_decl_ctx)
6731 {
6732 LinkDeclContextToDIE(spec_clang_decl_ctx, die);
6733 }
6734 else
6735 {
6736 GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
6737 MakeUserID(die->GetOffset()),
6738 specification_die_offset);
6739 }
6740 type_handled = true;
6741 }
6742 else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
6743 {
6744 // We have a specification which we are going to base our function
6745 // prototype off of, so we need this type to be completed so that the
6746 // m_die_to_decl_ctx for the method in the abstract origin has a valid
6747 // clang decl context.
6748 class_type->GetClangForwardType();
6749
6750 DWARFCompileUnitSP abs_cu_sp;
6751 const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
6752 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
6753 if (abs_clang_decl_ctx)
6754 {
6755 LinkDeclContextToDIE (abs_clang_decl_ctx, die);
6756 }
6757 else
6758 {
6759 GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
6760 MakeUserID(die->GetOffset()),
6761 abstract_origin_die_offset);
6762 }
6763 type_handled = true;
6764 }
6765 else
6766 {
6767 ClangASTType class_opaque_type = class_type->GetClangForwardType();
6768 if (class_opaque_type.IsCXXClassType ())
6769 {
6770 if (class_opaque_type.IsBeingDefined ())
6771 {
6772 // Neither GCC 4.2 nor clang++ currently set a valid accessibility
6773 // in the DWARF for C++ methods... Default to public for now...
6774 if (accessibility == eAccessNone)
6775 accessibility = eAccessPublic;
6776
6777 if (!is_static && !die->HasChildren())
6778 {
6779 // We have a C++ member function with no children (this pointer!)
6780 // and clang will get mad if we try and make a function that isn't
6781 // well formed in the DWARF, so we will just skip it...
6782 type_handled = true;
6783 }
6784 else
6785 {
6786 clang::CXXMethodDecl *cxx_method_decl;
6787 // REMOVE THE CRASH DESCRIPTION BELOW
6788 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
6789 type_name_cstr,
6790 class_type->GetName().GetCString(),
6791 MakeUserID(die->GetOffset()),
6792 m_obj_file->GetFileSpec().GetPath().c_str());
6793
6794 const bool is_attr_used = false;
6795
6796 cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
6797 clang_type,
6798 accessibility,
6799 is_virtual,
6800 is_static,
6801 is_inline,
6802 is_explicit,
6803 is_attr_used,
6804 is_artificial);
6805
6806 type_handled = cxx_method_decl != NULL;
6807
6808 if (type_handled)
6809 {
6810 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
6811
6812 Host::SetCrashDescription (NULL);
6813
6814
6815 ClangASTMetadata metadata;
6816 metadata.SetUserID(MakeUserID(die->GetOffset()));
6817
6818 if (!object_pointer_name.empty())
6819 {
6820 metadata.SetObjectPtrName(object_pointer_name.c_str());
6821 if (log)
6822 log->Printf ("Setting object pointer name: %s on method object %p.\n",
6823 object_pointer_name.c_str(),
6824 cxx_method_decl);
6825 }
6826 GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
6827 }
6828 else
6829 {
6830 ignore_containing_context = true;
6831 }
6832 }
6833 }
6834 else
6835 {
6836 // We were asked to parse the type for a method in a class, yet the
6837 // class hasn't been asked to complete itself through the
6838 // clang::ExternalASTSource protocol, so we need to just have the
6839 // class complete itself and do things the right way, then our
6840 // DIE should then have an entry in the m_die_to_type map. First
6841 // we need to modify the m_die_to_type so it doesn't think we are
6842 // trying to parse this DIE anymore...
6843 m_die_to_type[die] = NULL;
6844
6845 // Now we get the full type to force our class type to complete itself
6846 // using the clang::ExternalASTSource protocol which will parse all
6847 // base classes and all methods (including the method for this DIE).
6848 class_type->GetClangFullType();
6849
6850 // The type for this DIE should have been filled in the function call above
6851 type_ptr = m_die_to_type[die];
6852 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
6853 {
6854 type_sp = type_ptr->shared_from_this();
6855 break;
6856 }
6857
6858 // FIXME This is fixing some even uglier behavior but we really need to
6859 // uniq the methods of each class as well as the class itself.
6860 // <rdar://problem/11240464>
6861 type_handled = true;
6862 }
6863 }
6864 }
6865 }
6866 }
6867 }
6868
6869 if (!type_handled)
6870 {
6871 // We just have a function that isn't part of a class
6872 clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
6873 type_name_cstr,
6874 clang_type,
6875 storage,
6876 is_inline);
6877
6878 // if (template_param_infos.GetSize() > 0)
6879 // {
6880 // clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
6881 // function_decl,
6882 // type_name_cstr,
6883 // template_param_infos);
6884 //
6885 // ast.CreateFunctionTemplateSpecializationInfo (function_decl,
6886 // func_template_decl,
6887 // template_param_infos);
6888 // }
6889 // Add the decl to our DIE to decl context map
6890 assert (function_decl);
6891 LinkDeclContextToDIE(function_decl, die);
6892 if (!function_param_decls.empty())
6893 ast.SetFunctionParameters (function_decl,
6894 &function_param_decls.front(),
6895 function_param_decls.size());
6896
6897 ClangASTMetadata metadata;
6898 metadata.SetUserID(MakeUserID(die->GetOffset()));
6899
6900 if (!object_pointer_name.empty())
6901 {
6902 metadata.SetObjectPtrName(object_pointer_name.c_str());
6903 if (log)
6904 log->Printf ("Setting object pointer name: %s on function object %p.",
6905 object_pointer_name.c_str(),
6906 function_decl);
6907 }
6908 GetClangASTContext().SetMetadata (function_decl, metadata);
6909 }
6910 }
6911 type_sp.reset( new Type (MakeUserID(die->GetOffset()),
6912 this,
6913 type_name_const_str,
6914 0,
6915 NULL,
6916 LLDB_INVALID_UID,
6917 Type::eEncodingIsUID,
6918 &decl,
6919 clang_type,
6920 Type::eResolveStateFull));
6921 assert(type_sp.get());
6922 }
6923 break;
6924
6925 case DW_TAG_array_type:
6926 {
6927 // Set a bit that lets us know that we are currently parsing this
6928 m_die_to_type[die] = DIE_IS_BEING_PARSED;
6929
6930 lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
6931 int64_t first_index = 0;
6932 uint32_t byte_stride = 0;
6933 uint32_t bit_stride = 0;
6934 bool is_vector = false;
6935 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
6936
6937 if (num_attributes > 0)
6938 {
6939 uint32_t i;
6940 for (i=0; i<num_attributes; ++i)
6941 {
6942 attr = attributes.AttributeAtIndex(i);
6943 DWARFFormValue form_value;
6944 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
6945 {
6946 switch (attr)
6947 {
6948 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
6949 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
6950 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
6951 case DW_AT_name:
6952 type_name_cstr = form_value.AsCString(&get_debug_str_data());
6953 type_name_const_str.SetCString(type_name_cstr);
6954 break;
6955
6956 case DW_AT_type: type_die_offset = form_value.Reference(dwarf_cu); break;
6957 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break;
6958 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break;
6959 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break;
6960 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break;
6961 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
6962 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break;
6963 case DW_AT_allocated:
6964 case DW_AT_associated:
6965 case DW_AT_data_location:
6966 case DW_AT_description:
6967 case DW_AT_ordering:
6968 case DW_AT_start_scope:
6969 case DW_AT_visibility:
6970 case DW_AT_specification:
6971 case DW_AT_abstract_origin:
6972 case DW_AT_sibling:
6973 break;
6974 }
6975 }
6976 }
6977
6978 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
6979
6980 Type *element_type = ResolveTypeUID(type_die_offset);
6981
6982 if (element_type)
6983 {
6984 std::vector<uint64_t> element_orders;
6985 ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
6986 if (byte_stride == 0 && bit_stride == 0)
6987 byte_stride = element_type->GetByteSize();
6988 ClangASTType array_element_type = element_type->GetClangForwardType();
6989 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
6990 uint64_t num_elements = 0;
6991 std::vector<uint64_t>::const_reverse_iterator pos;
6992 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
6993 for (pos = element_orders.rbegin(); pos != end; ++pos)
6994 {
6995 num_elements = *pos;
6996 clang_type = ast.CreateArrayType (array_element_type,
6997 num_elements,
6998 is_vector);
6999 array_element_type = clang_type;
7000 array_element_bit_stride = num_elements ? array_element_bit_stride * num_elements : array_element_bit_stride;
7001 }
7002 ConstString empty_name;
7003 type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7004 this,
7005 empty_name,
7006 array_element_bit_stride / 8,
7007 NULL,
7008 type_die_offset,
7009 Type::eEncodingIsUID,
7010 &decl,
7011 clang_type,
7012 Type::eResolveStateFull));
7013 type_sp->SetEncodingType (element_type);
7014 }
7015 }
7016 }
7017 break;
7018
7019 case DW_TAG_ptr_to_member_type:
7020 {
7021 dw_offset_t type_die_offset = DW_INVALID_OFFSET;
7022 dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
7023
7024 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7025
7026 if (num_attributes > 0) {
7027 uint32_t i;
7028 for (i=0; i<num_attributes; ++i)
7029 {
7030 attr = attributes.AttributeAtIndex(i);
7031 DWARFFormValue form_value;
7032 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7033 {
7034 switch (attr)
7035 {
7036 case DW_AT_type:
7037 type_die_offset = form_value.Reference(dwarf_cu); break;
7038 case DW_AT_containing_type:
7039 containing_type_die_offset = form_value.Reference(dwarf_cu); break;
7040 }
7041 }
7042 }
7043
7044 Type *pointee_type = ResolveTypeUID(type_die_offset);
7045 Type *class_type = ResolveTypeUID(containing_type_die_offset);
7046
7047 ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
7048 ClangASTType class_clang_type = class_type->GetClangLayoutType();
7049
7050 clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
7051
7052 byte_size = clang_type.GetByteSize();
7053
7054 type_sp.reset( new Type (MakeUserID(die->GetOffset()),
7055 this,
7056 type_name_const_str,
7057 byte_size,
7058 NULL,
7059 LLDB_INVALID_UID,
7060 Type::eEncodingIsUID,
7061 NULL,
7062 clang_type,
7063 Type::eResolveStateForward));
7064 }
7065
7066 break;
7067 }
7068 default:
7069 GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
7070 die->GetOffset(),
7071 tag,
7072 DW_TAG_value_to_name(tag));
7073 break;
7074 }
7075
7076 if (type_sp.get())
7077 {
7078 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7079 dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7080
7081 SymbolContextScope * symbol_context_scope = NULL;
7082 if (sc_parent_tag == DW_TAG_compile_unit)
7083 {
7084 symbol_context_scope = sc.comp_unit;
7085 }
7086 else if (sc.function != NULL)
7087 {
7088 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7089 if (symbol_context_scope == NULL)
7090 symbol_context_scope = sc.function;
7091 }
7092
7093 if (symbol_context_scope != NULL)
7094 {
7095 type_sp->SetSymbolContextScope(symbol_context_scope);
7096 }
7097
7098 // We are ready to put this type into the uniqued list up at the module level
7099 type_list->Insert (type_sp);
7100
7101 m_die_to_type[die] = type_sp.get();
7102 }
7103 }
7104 else if (type_ptr != DIE_IS_BEING_PARSED)
7105 {
7106 type_sp = type_ptr->shared_from_this();
7107 }
7108 }
7109 return type_sp;
7110 }
7111
7112 size_t
ParseTypes(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,bool parse_siblings,bool parse_children)7113 SymbolFileDWARF::ParseTypes
7114 (
7115 const SymbolContext& sc,
7116 DWARFCompileUnit* dwarf_cu,
7117 const DWARFDebugInfoEntry *die,
7118 bool parse_siblings,
7119 bool parse_children
7120 )
7121 {
7122 size_t types_added = 0;
7123 while (die != NULL)
7124 {
7125 bool type_is_new = false;
7126 if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
7127 {
7128 if (type_is_new)
7129 ++types_added;
7130 }
7131
7132 if (parse_children && die->HasChildren())
7133 {
7134 if (die->Tag() == DW_TAG_subprogram)
7135 {
7136 SymbolContext child_sc(sc);
7137 child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
7138 types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
7139 }
7140 else
7141 types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
7142 }
7143
7144 if (parse_siblings)
7145 die = die->GetSibling();
7146 else
7147 die = NULL;
7148 }
7149 return types_added;
7150 }
7151
7152
7153 size_t
ParseFunctionBlocks(const SymbolContext & sc)7154 SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
7155 {
7156 assert(sc.comp_unit && sc.function);
7157 size_t functions_added = 0;
7158 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7159 if (dwarf_cu)
7160 {
7161 dw_offset_t function_die_offset = sc.function->GetID();
7162 const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
7163 if (function_die)
7164 {
7165 ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
7166 }
7167 }
7168
7169 return functions_added;
7170 }
7171
7172
7173 size_t
ParseTypes(const SymbolContext & sc)7174 SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
7175 {
7176 // At least a compile unit must be valid
7177 assert(sc.comp_unit);
7178 size_t types_added = 0;
7179 DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
7180 if (dwarf_cu)
7181 {
7182 if (sc.function)
7183 {
7184 dw_offset_t function_die_offset = sc.function->GetID();
7185 const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
7186 if (func_die && func_die->HasChildren())
7187 {
7188 types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
7189 }
7190 }
7191 else
7192 {
7193 const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
7194 if (dwarf_cu_die && dwarf_cu_die->HasChildren())
7195 {
7196 types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
7197 }
7198 }
7199 }
7200
7201 return types_added;
7202 }
7203
7204 size_t
ParseVariablesForContext(const SymbolContext & sc)7205 SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
7206 {
7207 if (sc.comp_unit != NULL)
7208 {
7209 DWARFDebugInfo* info = DebugInfo();
7210 if (info == NULL)
7211 return 0;
7212
7213 if (sc.function)
7214 {
7215 DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
7216
7217 if (dwarf_cu == NULL)
7218 return 0;
7219
7220 const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
7221
7222 dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
7223 if (func_lo_pc != LLDB_INVALID_ADDRESS)
7224 {
7225 const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
7226
7227 // Let all blocks know they have parse all their variables
7228 sc.function->GetBlock (false).SetDidParseVariables (true, true);
7229 return num_variables;
7230 }
7231 }
7232 else if (sc.comp_unit)
7233 {
7234 DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
7235
7236 if (dwarf_cu == NULL)
7237 return 0;
7238
7239 uint32_t vars_added = 0;
7240 VariableListSP variables (sc.comp_unit->GetVariableList(false));
7241
7242 if (variables.get() == NULL)
7243 {
7244 variables.reset(new VariableList());
7245 sc.comp_unit->SetVariableList(variables);
7246
7247 DWARFCompileUnit* match_dwarf_cu = NULL;
7248 const DWARFDebugInfoEntry* die = NULL;
7249 DIEArray die_offsets;
7250 if (m_using_apple_tables)
7251 {
7252 if (m_apple_names_ap.get())
7253 {
7254 DWARFMappedHash::DIEInfoArray hash_data_array;
7255 if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
7256 dwarf_cu->GetNextCompileUnitOffset(),
7257 hash_data_array))
7258 {
7259 DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
7260 }
7261 }
7262 }
7263 else
7264 {
7265 // Index if we already haven't to make sure the compile units
7266 // get indexed and make their global DIE index list
7267 if (!m_indexed)
7268 Index ();
7269
7270 m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
7271 dwarf_cu->GetNextCompileUnitOffset(),
7272 die_offsets);
7273 }
7274
7275 const size_t num_matches = die_offsets.size();
7276 if (num_matches)
7277 {
7278 DWARFDebugInfo* debug_info = DebugInfo();
7279 for (size_t i=0; i<num_matches; ++i)
7280 {
7281 const dw_offset_t die_offset = die_offsets[i];
7282 die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
7283 if (die)
7284 {
7285 VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
7286 if (var_sp)
7287 {
7288 variables->AddVariableIfUnique (var_sp);
7289 ++vars_added;
7290 }
7291 }
7292 else
7293 {
7294 if (m_using_apple_tables)
7295 {
7296 GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
7297 }
7298 }
7299
7300 }
7301 }
7302 }
7303 return vars_added;
7304 }
7305 }
7306 return 0;
7307 }
7308
7309
7310 VariableSP
ParseVariableDIE(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,const lldb::addr_t func_low_pc)7311 SymbolFileDWARF::ParseVariableDIE
7312 (
7313 const SymbolContext& sc,
7314 DWARFCompileUnit* dwarf_cu,
7315 const DWARFDebugInfoEntry *die,
7316 const lldb::addr_t func_low_pc
7317 )
7318 {
7319
7320 VariableSP var_sp (m_die_to_variable_sp[die]);
7321 if (var_sp)
7322 return var_sp; // Already been parsed!
7323
7324 const dw_tag_t tag = die->Tag();
7325 ModuleSP module = GetObjectFile()->GetModule();
7326
7327 if ((tag == DW_TAG_variable) ||
7328 (tag == DW_TAG_constant) ||
7329 (tag == DW_TAG_formal_parameter && sc.function))
7330 {
7331 DWARFDebugInfoEntry::Attributes attributes;
7332 const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
7333 if (num_attributes > 0)
7334 {
7335 const char *name = NULL;
7336 const char *mangled = NULL;
7337 Declaration decl;
7338 uint32_t i;
7339 lldb::user_id_t type_uid = LLDB_INVALID_UID;
7340 DWARFExpression location;
7341 bool is_external = false;
7342 bool is_artificial = false;
7343 bool location_is_const_value_data = false;
7344 bool has_explicit_location = false;
7345 //AccessType accessibility = eAccessNone;
7346
7347 for (i=0; i<num_attributes; ++i)
7348 {
7349 dw_attr_t attr = attributes.AttributeAtIndex(i);
7350 DWARFFormValue form_value;
7351 if (attributes.ExtractFormValueAtIndex(this, i, form_value))
7352 {
7353 switch (attr)
7354 {
7355 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
7356 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
7357 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
7358 case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
7359 case DW_AT_linkage_name:
7360 case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
7361 case DW_AT_type: type_uid = form_value.Reference(dwarf_cu); break;
7362 case DW_AT_external: is_external = form_value.Boolean(); break;
7363 case DW_AT_const_value:
7364 // If we have already found a DW_AT_location attribute, ignore this attribute.
7365 if (!has_explicit_location)
7366 {
7367 location_is_const_value_data = true;
7368 // The constant value will be either a block, a data value or a string.
7369 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7370 if (DWARFFormValue::IsBlockForm(form_value.Form()))
7371 {
7372 // Retrieve the value as a block expression.
7373 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7374 uint32_t block_length = form_value.Unsigned();
7375 location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
7376 }
7377 else if (DWARFFormValue::IsDataForm(form_value.Form()))
7378 {
7379 // Retrieve the value as a data expression.
7380 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7381 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7382 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7383 location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7384 }
7385 else
7386 {
7387 // Retrieve the value as a string expression.
7388 if (form_value.Form() == DW_FORM_strp)
7389 {
7390 const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize());
7391 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
7392 uint32_t data_length = fixed_form_sizes[form_value.Form()];
7393 location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
7394 }
7395 else
7396 {
7397 const char *str = form_value.AsCString(&debug_info_data);
7398 uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
7399 uint32_t string_length = strlen(str) + 1;
7400 location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
7401 }
7402 }
7403 }
7404 break;
7405 case DW_AT_location:
7406 {
7407 location_is_const_value_data = false;
7408 has_explicit_location = true;
7409 if (form_value.BlockData())
7410 {
7411 const DWARFDataExtractor& debug_info_data = get_debug_info_data();
7412
7413 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
7414 uint32_t block_length = form_value.Unsigned();
7415 location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
7416 }
7417 else
7418 {
7419 const DWARFDataExtractor& debug_loc_data = get_debug_loc_data();
7420 const dw_offset_t debug_loc_offset = form_value.Unsigned();
7421
7422 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
7423 if (loc_list_length > 0)
7424 {
7425 location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
7426 assert (func_low_pc != LLDB_INVALID_ADDRESS);
7427 location.SetLocationListSlide (func_low_pc - dwarf_cu->GetBaseAddress());
7428 }
7429 }
7430 }
7431 break;
7432
7433 case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
7434 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
7435 case DW_AT_declaration:
7436 case DW_AT_description:
7437 case DW_AT_endianity:
7438 case DW_AT_segment:
7439 case DW_AT_start_scope:
7440 case DW_AT_visibility:
7441 default:
7442 case DW_AT_abstract_origin:
7443 case DW_AT_sibling:
7444 case DW_AT_specification:
7445 break;
7446 }
7447 }
7448 }
7449
7450 ValueType scope = eValueTypeInvalid;
7451
7452 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
7453 dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7454 SymbolContextScope * symbol_context_scope = NULL;
7455
7456 // DWARF doesn't specify if a DW_TAG_variable is a local, global
7457 // or static variable, so we have to do a little digging by
7458 // looking at the location of a varaible to see if it contains
7459 // a DW_OP_addr opcode _somewhere_ in the definition. I say
7460 // somewhere because clang likes to combine small global variables
7461 // into the same symbol and have locations like:
7462 // DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
7463 // So if we don't have a DW_TAG_formal_parameter, we can look at
7464 // the location to see if it contains a DW_OP_addr opcode, and
7465 // then we can correctly classify our variables.
7466 if (tag == DW_TAG_formal_parameter)
7467 scope = eValueTypeVariableArgument;
7468 else
7469 {
7470 bool op_error = false;
7471 // Check if the location has a DW_OP_addr with any address value...
7472 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
7473 if (!location_is_const_value_data)
7474 {
7475 location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
7476 if (op_error)
7477 {
7478 StreamString strm;
7479 location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
7480 GetObjectFile()->GetModule()->ReportError ("0x%8.8x: %s has an invalid location: %s", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), strm.GetString().c_str());
7481 }
7482 }
7483
7484 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
7485 {
7486 if (is_external)
7487 scope = eValueTypeVariableGlobal;
7488 else
7489 scope = eValueTypeVariableStatic;
7490
7491
7492 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
7493
7494 if (debug_map_symfile)
7495 {
7496 // When leaving the DWARF in the .o files on darwin,
7497 // when we have a global variable that wasn't initialized,
7498 // the .o file might not have allocated a virtual
7499 // address for the global variable. In this case it will
7500 // have created a symbol for the global variable
7501 // that is undefined/data and external and the value will
7502 // be the byte size of the variable. When we do the
7503 // address map in SymbolFileDWARFDebugMap we rely on
7504 // having an address, we need to do some magic here
7505 // so we can get the correct address for our global
7506 // variable. The address for all of these entries
7507 // will be zero, and there will be an undefined symbol
7508 // in this object file, and the executable will have
7509 // a matching symbol with a good address. So here we
7510 // dig up the correct address and replace it in the
7511 // location for the variable, and set the variable's
7512 // symbol context scope to be that of the main executable
7513 // so the file address will resolve correctly.
7514 bool linked_oso_file_addr = false;
7515 if (is_external && location_DW_OP_addr == 0)
7516 {
7517 // we have a possible uninitialized extern global
7518 ConstString const_name(mangled ? mangled : name);
7519 ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
7520 if (debug_map_objfile)
7521 {
7522 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
7523 if (debug_map_symtab)
7524 {
7525 Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
7526 eSymbolTypeData,
7527 Symtab::eDebugYes,
7528 Symtab::eVisibilityExtern);
7529 if (exe_symbol)
7530 {
7531 if (exe_symbol->ValueIsAddress())
7532 {
7533 const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
7534 if (exe_file_addr != LLDB_INVALID_ADDRESS)
7535 {
7536 if (location.Update_DW_OP_addr (exe_file_addr))
7537 {
7538 linked_oso_file_addr = true;
7539 symbol_context_scope = exe_symbol;
7540 }
7541 }
7542 }
7543 }
7544 }
7545 }
7546 }
7547
7548 if (!linked_oso_file_addr)
7549 {
7550 // The DW_OP_addr is not zero, but it contains a .o file address which
7551 // needs to be linked up correctly.
7552 const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
7553 if (exe_file_addr != LLDB_INVALID_ADDRESS)
7554 {
7555 // Update the file address for this variable
7556 location.Update_DW_OP_addr (exe_file_addr);
7557 }
7558 else
7559 {
7560 // Variable didn't make it into the final executable
7561 return var_sp;
7562 }
7563 }
7564 }
7565 }
7566 else
7567 {
7568 scope = eValueTypeVariableLocal;
7569 }
7570 }
7571
7572 if (symbol_context_scope == NULL)
7573 {
7574 switch (parent_tag)
7575 {
7576 case DW_TAG_subprogram:
7577 case DW_TAG_inlined_subroutine:
7578 case DW_TAG_lexical_block:
7579 if (sc.function)
7580 {
7581 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7582 if (symbol_context_scope == NULL)
7583 symbol_context_scope = sc.function;
7584 }
7585 break;
7586
7587 default:
7588 symbol_context_scope = sc.comp_unit;
7589 break;
7590 }
7591 }
7592
7593 if (symbol_context_scope)
7594 {
7595 var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
7596 name,
7597 mangled,
7598 SymbolFileTypeSP (new SymbolFileType(*this, type_uid)),
7599 scope,
7600 symbol_context_scope,
7601 &decl,
7602 location,
7603 is_external,
7604 is_artificial));
7605
7606 var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
7607 }
7608 else
7609 {
7610 // Not ready to parse this variable yet. It might be a global
7611 // or static variable that is in a function scope and the function
7612 // in the symbol context wasn't filled in yet
7613 return var_sp;
7614 }
7615 }
7616 // Cache var_sp even if NULL (the variable was just a specification or
7617 // was missing vital information to be able to be displayed in the debugger
7618 // (missing location due to optimization, etc)) so we don't re-parse
7619 // this DIE over and over later...
7620 m_die_to_variable_sp[die] = var_sp;
7621 }
7622 return var_sp;
7623 }
7624
7625
7626 const DWARFDebugInfoEntry *
FindBlockContainingSpecification(dw_offset_t func_die_offset,dw_offset_t spec_block_die_offset,DWARFCompileUnit ** result_die_cu_handle)7627 SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
7628 dw_offset_t spec_block_die_offset,
7629 DWARFCompileUnit **result_die_cu_handle)
7630 {
7631 // Give the concrete function die specified by "func_die_offset", find the
7632 // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7633 // to "spec_block_die_offset"
7634 DWARFDebugInfo* info = DebugInfo();
7635
7636 const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
7637 if (die)
7638 {
7639 assert (*result_die_cu_handle);
7640 return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
7641 }
7642 return NULL;
7643 }
7644
7645
7646 const DWARFDebugInfoEntry *
FindBlockContainingSpecification(DWARFCompileUnit * dwarf_cu,const DWARFDebugInfoEntry * die,dw_offset_t spec_block_die_offset,DWARFCompileUnit ** result_die_cu_handle)7647 SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
7648 const DWARFDebugInfoEntry *die,
7649 dw_offset_t spec_block_die_offset,
7650 DWARFCompileUnit **result_die_cu_handle)
7651 {
7652 if (die)
7653 {
7654 switch (die->Tag())
7655 {
7656 case DW_TAG_subprogram:
7657 case DW_TAG_inlined_subroutine:
7658 case DW_TAG_lexical_block:
7659 {
7660 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
7661 {
7662 *result_die_cu_handle = dwarf_cu;
7663 return die;
7664 }
7665
7666 if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
7667 {
7668 *result_die_cu_handle = dwarf_cu;
7669 return die;
7670 }
7671 }
7672 break;
7673 }
7674
7675 // Give the concrete function die specified by "func_die_offset", find the
7676 // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
7677 // to "spec_block_die_offset"
7678 for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
7679 {
7680 const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
7681 child_die,
7682 spec_block_die_offset,
7683 result_die_cu_handle);
7684 if (result_die)
7685 return result_die;
7686 }
7687 }
7688
7689 *result_die_cu_handle = NULL;
7690 return NULL;
7691 }
7692
7693 size_t
ParseVariables(const SymbolContext & sc,DWARFCompileUnit * dwarf_cu,const lldb::addr_t func_low_pc,const DWARFDebugInfoEntry * orig_die,bool parse_siblings,bool parse_children,VariableList * cc_variable_list)7694 SymbolFileDWARF::ParseVariables
7695 (
7696 const SymbolContext& sc,
7697 DWARFCompileUnit* dwarf_cu,
7698 const lldb::addr_t func_low_pc,
7699 const DWARFDebugInfoEntry *orig_die,
7700 bool parse_siblings,
7701 bool parse_children,
7702 VariableList* cc_variable_list
7703 )
7704 {
7705 if (orig_die == NULL)
7706 return 0;
7707
7708 VariableListSP variable_list_sp;
7709
7710 size_t vars_added = 0;
7711 const DWARFDebugInfoEntry *die = orig_die;
7712 while (die != NULL)
7713 {
7714 dw_tag_t tag = die->Tag();
7715
7716 // Check to see if we have already parsed this variable or constant?
7717 if (m_die_to_variable_sp[die])
7718 {
7719 if (cc_variable_list)
7720 cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
7721 }
7722 else
7723 {
7724 // We haven't already parsed it, lets do that now.
7725 if ((tag == DW_TAG_variable) ||
7726 (tag == DW_TAG_constant) ||
7727 (tag == DW_TAG_formal_parameter && sc.function))
7728 {
7729 if (variable_list_sp.get() == NULL)
7730 {
7731 const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
7732 dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
7733 switch (parent_tag)
7734 {
7735 case DW_TAG_compile_unit:
7736 if (sc.comp_unit != NULL)
7737 {
7738 variable_list_sp = sc.comp_unit->GetVariableList(false);
7739 if (variable_list_sp.get() == NULL)
7740 {
7741 variable_list_sp.reset(new VariableList());
7742 sc.comp_unit->SetVariableList(variable_list_sp);
7743 }
7744 }
7745 else
7746 {
7747 GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
7748 MakeUserID(sc_parent_die->GetOffset()),
7749 DW_TAG_value_to_name (parent_tag),
7750 MakeUserID(orig_die->GetOffset()),
7751 DW_TAG_value_to_name (orig_die->Tag()));
7752 }
7753 break;
7754
7755 case DW_TAG_subprogram:
7756 case DW_TAG_inlined_subroutine:
7757 case DW_TAG_lexical_block:
7758 if (sc.function != NULL)
7759 {
7760 // Check to see if we already have parsed the variables for the given scope
7761
7762 Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
7763 if (block == NULL)
7764 {
7765 // This must be a specification or abstract origin with
7766 // a concrete block couterpart in the current function. We need
7767 // to find the concrete block so we can correctly add the
7768 // variable to it
7769 DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
7770 const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
7771 sc_parent_die->GetOffset(),
7772 &concrete_block_die_cu);
7773 if (concrete_block_die)
7774 block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
7775 }
7776
7777 if (block != NULL)
7778 {
7779 const bool can_create = false;
7780 variable_list_sp = block->GetBlockVariableList (can_create);
7781 if (variable_list_sp.get() == NULL)
7782 {
7783 variable_list_sp.reset(new VariableList());
7784 block->SetVariableList(variable_list_sp);
7785 }
7786 }
7787 }
7788 break;
7789
7790 default:
7791 GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
7792 MakeUserID(orig_die->GetOffset()),
7793 DW_TAG_value_to_name (orig_die->Tag()));
7794 break;
7795 }
7796 }
7797
7798 if (variable_list_sp)
7799 {
7800 VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
7801 if (var_sp)
7802 {
7803 variable_list_sp->AddVariableIfUnique (var_sp);
7804 if (cc_variable_list)
7805 cc_variable_list->AddVariableIfUnique (var_sp);
7806 ++vars_added;
7807 }
7808 }
7809 }
7810 }
7811
7812 bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
7813
7814 if (!skip_children && parse_children && die->HasChildren())
7815 {
7816 vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
7817 }
7818
7819 if (parse_siblings)
7820 die = die->GetSibling();
7821 else
7822 die = NULL;
7823 }
7824 return vars_added;
7825 }
7826
7827 //------------------------------------------------------------------
7828 // PluginInterface protocol
7829 //------------------------------------------------------------------
7830 ConstString
GetPluginName()7831 SymbolFileDWARF::GetPluginName()
7832 {
7833 return GetPluginNameStatic();
7834 }
7835
7836 uint32_t
GetPluginVersion()7837 SymbolFileDWARF::GetPluginVersion()
7838 {
7839 return 1;
7840 }
7841
7842 void
CompleteTagDecl(void * baton,clang::TagDecl * decl)7843 SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
7844 {
7845 SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7846 ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7847 if (clang_type)
7848 symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7849 }
7850
7851 void
CompleteObjCInterfaceDecl(void * baton,clang::ObjCInterfaceDecl * decl)7852 SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
7853 {
7854 SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7855 ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
7856 if (clang_type)
7857 symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
7858 }
7859
7860 void
DumpIndexes()7861 SymbolFileDWARF::DumpIndexes ()
7862 {
7863 StreamFile s(stdout, false);
7864
7865 s.Printf ("DWARF index for (%s) '%s':",
7866 GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
7867 GetObjectFile()->GetFileSpec().GetPath().c_str());
7868 s.Printf("\nFunction basenames:\n"); m_function_basename_index.Dump (&s);
7869 s.Printf("\nFunction fullnames:\n"); m_function_fullname_index.Dump (&s);
7870 s.Printf("\nFunction methods:\n"); m_function_method_index.Dump (&s);
7871 s.Printf("\nFunction selectors:\n"); m_function_selector_index.Dump (&s);
7872 s.Printf("\nObjective C class selectors:\n"); m_objc_class_selectors_index.Dump (&s);
7873 s.Printf("\nGlobals and statics:\n"); m_global_index.Dump (&s);
7874 s.Printf("\nTypes:\n"); m_type_index.Dump (&s);
7875 s.Printf("\nNamepaces:\n"); m_namespace_index.Dump (&s);
7876 }
7877
7878 void
SearchDeclContext(const clang::DeclContext * decl_context,const char * name,llvm::SmallVectorImpl<clang::NamedDecl * > * results)7879 SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
7880 const char *name,
7881 llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7882 {
7883 DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
7884
7885 if (iter == m_decl_ctx_to_die.end())
7886 return;
7887
7888 for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
7889 {
7890 const DWARFDebugInfoEntry *context_die = *pos;
7891
7892 if (!results)
7893 return;
7894
7895 DWARFDebugInfo* info = DebugInfo();
7896
7897 DIEArray die_offsets;
7898
7899 DWARFCompileUnit* dwarf_cu = NULL;
7900 const DWARFDebugInfoEntry* die = NULL;
7901
7902 if (m_using_apple_tables)
7903 {
7904 if (m_apple_types_ap.get())
7905 m_apple_types_ap->FindByName (name, die_offsets);
7906 }
7907 else
7908 {
7909 if (!m_indexed)
7910 Index ();
7911
7912 m_type_index.Find (ConstString(name), die_offsets);
7913 }
7914
7915 const size_t num_matches = die_offsets.size();
7916
7917 if (num_matches)
7918 {
7919 for (size_t i = 0; i < num_matches; ++i)
7920 {
7921 const dw_offset_t die_offset = die_offsets[i];
7922 die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
7923
7924 if (die->GetParent() != context_die)
7925 continue;
7926
7927 Type *matching_type = ResolveType (dwarf_cu, die);
7928
7929 clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
7930
7931 if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
7932 {
7933 clang::TagDecl *tag_decl = tag_type->getDecl();
7934 results->push_back(tag_decl);
7935 }
7936 else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
7937 {
7938 clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
7939 results->push_back(typedef_decl);
7940 }
7941 }
7942 }
7943 }
7944 }
7945
7946 void
FindExternalVisibleDeclsByName(void * baton,const clang::DeclContext * decl_context,clang::DeclarationName decl_name,llvm::SmallVectorImpl<clang::NamedDecl * > * results)7947 SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
7948 const clang::DeclContext *decl_context,
7949 clang::DeclarationName decl_name,
7950 llvm::SmallVectorImpl <clang::NamedDecl *> *results)
7951 {
7952
7953 switch (decl_context->getDeclKind())
7954 {
7955 case clang::Decl::Namespace:
7956 case clang::Decl::TranslationUnit:
7957 {
7958 SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7959 symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
7960 }
7961 break;
7962 default:
7963 break;
7964 }
7965 }
7966
7967 bool
LayoutRecordType(void * baton,const clang::RecordDecl * record_decl,uint64_t & size,uint64_t & alignment,llvm::DenseMap<const clang::FieldDecl *,uint64_t> & field_offsets,llvm::DenseMap<const clang::CXXRecordDecl *,clang::CharUnits> & base_offsets,llvm::DenseMap<const clang::CXXRecordDecl *,clang::CharUnits> & vbase_offsets)7968 SymbolFileDWARF::LayoutRecordType (void *baton,
7969 const clang::RecordDecl *record_decl,
7970 uint64_t &size,
7971 uint64_t &alignment,
7972 llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7973 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7974 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7975 {
7976 SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
7977 return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
7978 }
7979
7980
7981 bool
LayoutRecordType(const clang::RecordDecl * record_decl,uint64_t & bit_size,uint64_t & alignment,llvm::DenseMap<const clang::FieldDecl *,uint64_t> & field_offsets,llvm::DenseMap<const clang::CXXRecordDecl *,clang::CharUnits> & base_offsets,llvm::DenseMap<const clang::CXXRecordDecl *,clang::CharUnits> & vbase_offsets)7982 SymbolFileDWARF::LayoutRecordType (const clang::RecordDecl *record_decl,
7983 uint64_t &bit_size,
7984 uint64_t &alignment,
7985 llvm::DenseMap <const clang::FieldDecl *, uint64_t> &field_offsets,
7986 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
7987 llvm::DenseMap <const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
7988 {
7989 Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
7990 RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
7991 bool success = false;
7992 base_offsets.clear();
7993 vbase_offsets.clear();
7994 if (pos != m_record_decl_to_layout_map.end())
7995 {
7996 bit_size = pos->second.bit_size;
7997 alignment = pos->second.alignment;
7998 field_offsets.swap(pos->second.field_offsets);
7999 base_offsets.swap (pos->second.base_offsets);
8000 vbase_offsets.swap (pos->second.vbase_offsets);
8001 m_record_decl_to_layout_map.erase(pos);
8002 success = true;
8003 }
8004 else
8005 {
8006 bit_size = 0;
8007 alignment = 0;
8008 field_offsets.clear();
8009 }
8010
8011 if (log)
8012 GetObjectFile()->GetModule()->LogMessage (log,
8013 "SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
8014 record_decl,
8015 bit_size,
8016 alignment,
8017 (uint32_t)field_offsets.size(),
8018 (uint32_t)base_offsets.size(),
8019 (uint32_t)vbase_offsets.size(),
8020 success);
8021 return success;
8022 }
8023
8024
8025 SymbolFileDWARFDebugMap *
GetDebugMapSymfile()8026 SymbolFileDWARF::GetDebugMapSymfile ()
8027 {
8028 if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
8029 {
8030 lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
8031 if (module_sp)
8032 {
8033 SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
8034 if (sym_vendor)
8035 m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
8036 }
8037 }
8038 return m_debug_map_symfile;
8039 }
8040
8041
8042