1 //===-- SymbolFileDWARF.cpp ------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "SymbolFileDWARF.h"
12 #include "llvm/Support/Casting.h"
13 #include "llvm/Support/Threading.h"
15 #include "lldb/Core/Module.h"
16 #include "lldb/Core/ModuleList.h"
17 #include "lldb/Core/ModuleSpec.h"
18 #include "lldb/Core/PluginManager.h"
19 #include "lldb/Core/Section.h"
20 #include "lldb/Core/StreamFile.h"
21 #include "lldb/Core/Value.h"
22 #include "lldb/Utility/ArchSpec.h"
23 #include "lldb/Utility/RegularExpression.h"
24 #include "lldb/Utility/Scalar.h"
25 #include "lldb/Utility/StreamString.h"
26 #include "lldb/Utility/Timer.h"
28 #include "Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h"
29 #include "Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
31 #include "lldb/Host/FileSystem.h"
32 #include "lldb/Host/Host.h"
33 #include "lldb/Host/Symbols.h"
35 #include "lldb/Interpreter/OptionValueFileSpecList.h"
36 #include "lldb/Interpreter/OptionValueProperties.h"
38 #include "lldb/Symbol/Block.h"
39 #include "lldb/Symbol/ClangASTContext.h"
40 #include "lldb/Symbol/ClangUtil.h"
41 #include "lldb/Symbol/CompileUnit.h"
42 #include "lldb/Symbol/CompilerDecl.h"
43 #include "lldb/Symbol/CompilerDeclContext.h"
44 #include "lldb/Symbol/DebugMacros.h"
45 #include "lldb/Symbol/LineTable.h"
46 #include "lldb/Symbol/ObjectFile.h"
47 #include "lldb/Symbol/SymbolVendor.h"
48 #include "lldb/Symbol/TypeMap.h"
49 #include "lldb/Symbol/TypeSystem.h"
50 #include "lldb/Symbol/VariableList.h"
52 #include "lldb/Target/Language.h"
54 #include "AppleDWARFIndex.h"
55 #include "DWARFASTParser.h"
56 #include "DWARFASTParserClang.h"
57 #include "DWARFDIECollection.h"
58 #include "DWARFDebugAbbrev.h"
59 #include "DWARFDebugAranges.h"
60 #include "DWARFDebugInfo.h"
61 #include "DWARFDebugLine.h"
62 #include "DWARFDebugMacro.h"
63 #include "DWARFDebugRanges.h"
64 #include "DWARFDeclContext.h"
65 #include "DWARFFormValue.h"
66 #include "DWARFUnit.h"
67 #include "DebugNamesDWARFIndex.h"
68 #include "LogChannelDWARF.h"
69 #include "ManualDWARFIndex.h"
70 #include "SymbolFileDWARFDebugMap.h"
71 #include "SymbolFileDWARFDwo.h"
72 #include "SymbolFileDWARFDwp.h"
74 #include "llvm/Support/FileSystem.h"
81 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
83 #ifdef ENABLE_DEBUG_PRINTF
85 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
87 #define DEBUG_PRINTF(fmt, ...)
91 using namespace lldb_private;
94 // child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
100 // case DW_TAG_subprogram:
101 // case DW_TAG_inlined_subroutine:
102 // case DW_TAG_class_type:
103 // case DW_TAG_structure_type:
104 // case DW_TAG_union_type:
113 static constexpr PropertyDefinition g_properties[] = {
114 {"comp-dir-symlink-paths", OptionValue::eTypeFileSpecList, true, 0, nullptr,
116 "If the DW_AT_comp_dir matches any of these paths the symbolic "
117 "links will be resolved at DWARF parse time."},
118 {"ignore-file-indexes", OptionValue::eTypeBoolean, true, 0, nullptr, {},
119 "Ignore indexes present in the object files and always index DWARF "
123 ePropertySymLinkPaths,
124 ePropertyIgnoreIndexes,
127 class PluginProperties : public Properties {
129 static ConstString GetSettingName() {
130 return SymbolFileDWARF::GetPluginNameStatic();
134 m_collection_sp.reset(new OptionValueProperties(GetSettingName()));
135 m_collection_sp->Initialize(g_properties);
138 FileSpecList &GetSymLinkPaths() {
139 OptionValueFileSpecList *option_value =
140 m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpecList(
141 nullptr, true, ePropertySymLinkPaths);
142 assert(option_value);
143 return option_value->GetCurrentValue();
146 bool IgnoreFileIndexes() const {
147 return m_collection_sp->GetPropertyAtIndexAsBoolean(
148 nullptr, ePropertyIgnoreIndexes, false);
152 typedef std::shared_ptr<PluginProperties> SymbolFileDWARFPropertiesSP;
154 static const SymbolFileDWARFPropertiesSP &GetGlobalPluginProperties() {
155 static const auto g_settings_sp(std::make_shared<PluginProperties>());
156 return g_settings_sp;
159 } // anonymous namespace end
161 static const char *removeHostnameFromPathname(const char *path_from_dwarf) {
162 if (!path_from_dwarf || !path_from_dwarf[0]) {
163 return path_from_dwarf;
166 const char *colon_pos = strchr(path_from_dwarf, ':');
167 if (nullptr == colon_pos) {
168 return path_from_dwarf;
171 const char *slash_pos = strchr(path_from_dwarf, '/');
172 if (slash_pos && (slash_pos < colon_pos)) {
173 return path_from_dwarf;
176 // check whether we have a windows path, and so the first character is a
177 // drive-letter not a hostname.
178 if (colon_pos == path_from_dwarf + 1 && isalpha(*path_from_dwarf) &&
179 strlen(path_from_dwarf) > 2 && '\\' == path_from_dwarf[2]) {
180 return path_from_dwarf;
183 return colon_pos + 1;
186 static FileSpec resolveCompDir(const char *path_from_dwarf) {
187 if (!path_from_dwarf)
190 // DWARF2/3 suggests the form hostname:pathname for compilation directory.
191 // Remove the host part if present.
192 const char *local_path = removeHostnameFromPathname(path_from_dwarf);
196 bool is_symlink = false;
197 // Always normalize our compile unit directory to get rid of redundant
198 // slashes and other path anomalies before we use it for path prepending
199 FileSpec local_spec(local_path);
200 const auto &file_specs = GetGlobalPluginProperties()->GetSymLinkPaths();
201 for (size_t i = 0; i < file_specs.GetSize() && !is_symlink; ++i)
202 is_symlink = FileSpec::Equal(file_specs.GetFileSpecAtIndex(i),
208 namespace fs = llvm::sys::fs;
209 if (fs::get_file_type(local_spec.GetPath(), false) !=
210 fs::file_type::symlink_file)
213 FileSpec resolved_symlink;
214 const auto error = FileSystem::Instance().Readlink(local_spec, resolved_symlink);
216 return resolved_symlink;
221 DWARFUnit *SymbolFileDWARF::GetBaseCompileUnit() {
225 void SymbolFileDWARF::Initialize() {
226 LogChannelDWARF::Initialize();
227 PluginManager::RegisterPlugin(GetPluginNameStatic(),
228 GetPluginDescriptionStatic(), CreateInstance,
232 void SymbolFileDWARF::DebuggerInitialize(Debugger &debugger) {
233 if (!PluginManager::GetSettingForSymbolFilePlugin(
234 debugger, PluginProperties::GetSettingName())) {
235 const bool is_global_setting = true;
236 PluginManager::CreateSettingForSymbolFilePlugin(
237 debugger, GetGlobalPluginProperties()->GetValueProperties(),
238 ConstString("Properties for the dwarf symbol-file plug-in."),
243 void SymbolFileDWARF::Terminate() {
244 PluginManager::UnregisterPlugin(CreateInstance);
245 LogChannelDWARF::Terminate();
248 lldb_private::ConstString SymbolFileDWARF::GetPluginNameStatic() {
249 static ConstString g_name("dwarf");
253 const char *SymbolFileDWARF::GetPluginDescriptionStatic() {
254 return "DWARF and DWARF3 debug symbol file reader.";
257 SymbolFile *SymbolFileDWARF::CreateInstance(ObjectFile *obj_file) {
258 return new SymbolFileDWARF(obj_file);
261 TypeList *SymbolFileDWARF::GetTypeList() {
262 // This method can be called without going through the symbol vendor so we
263 // need to lock the module.
264 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
265 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
266 if (debug_map_symfile)
267 return debug_map_symfile->GetTypeList();
269 return m_obj_file->GetModule()->GetTypeList();
271 void SymbolFileDWARF::GetTypes(const DWARFDIE &die, dw_offset_t min_die_offset,
272 dw_offset_t max_die_offset, uint32_t type_mask,
275 const dw_offset_t die_offset = die.GetOffset();
277 if (die_offset >= max_die_offset)
280 if (die_offset >= min_die_offset) {
281 const dw_tag_t tag = die.Tag();
283 bool add_type = false;
286 case DW_TAG_array_type:
287 add_type = (type_mask & eTypeClassArray) != 0;
289 case DW_TAG_unspecified_type:
290 case DW_TAG_base_type:
291 add_type = (type_mask & eTypeClassBuiltin) != 0;
293 case DW_TAG_class_type:
294 add_type = (type_mask & eTypeClassClass) != 0;
296 case DW_TAG_structure_type:
297 add_type = (type_mask & eTypeClassStruct) != 0;
299 case DW_TAG_union_type:
300 add_type = (type_mask & eTypeClassUnion) != 0;
302 case DW_TAG_enumeration_type:
303 add_type = (type_mask & eTypeClassEnumeration) != 0;
305 case DW_TAG_subroutine_type:
306 case DW_TAG_subprogram:
307 case DW_TAG_inlined_subroutine:
308 add_type = (type_mask & eTypeClassFunction) != 0;
310 case DW_TAG_pointer_type:
311 add_type = (type_mask & eTypeClassPointer) != 0;
313 case DW_TAG_rvalue_reference_type:
314 case DW_TAG_reference_type:
315 add_type = (type_mask & eTypeClassReference) != 0;
318 add_type = (type_mask & eTypeClassTypedef) != 0;
320 case DW_TAG_ptr_to_member_type:
321 add_type = (type_mask & eTypeClassMemberPointer) != 0;
326 const bool assert_not_being_parsed = true;
327 Type *type = ResolveTypeUID(die, assert_not_being_parsed);
329 if (type_set.find(type) == type_set.end())
330 type_set.insert(type);
335 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid();
336 child_die = child_die.GetSibling()) {
337 GetTypes(child_die, min_die_offset, max_die_offset, type_mask, type_set);
342 size_t SymbolFileDWARF::GetTypes(SymbolContextScope *sc_scope,
343 TypeClass type_mask, TypeList &type_list)
346 ASSERT_MODULE_LOCK(this);
349 CompileUnit *comp_unit = NULL;
350 DWARFUnit *dwarf_cu = NULL;
352 comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
355 dwarf_cu = GetDWARFCompileUnit(comp_unit);
358 GetTypes(dwarf_cu->DIE(), dwarf_cu->GetOffset(),
359 dwarf_cu->GetNextCompileUnitOffset(), type_mask, type_set);
361 DWARFDebugInfo *info = DebugInfo();
363 const size_t num_cus = info->GetNumCompileUnits();
364 for (size_t cu_idx = 0; cu_idx < num_cus; ++cu_idx) {
365 dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
367 GetTypes(dwarf_cu->DIE(), 0, UINT32_MAX, type_mask, type_set);
373 std::set<CompilerType> compiler_type_set;
374 size_t num_types_added = 0;
375 for (Type *type : type_set) {
376 CompilerType compiler_type = type->GetForwardCompilerType();
377 if (compiler_type_set.find(compiler_type) == compiler_type_set.end()) {
378 compiler_type_set.insert(compiler_type);
379 type_list.Insert(type->shared_from_this());
383 return num_types_added;
386 //----------------------------------------------------------------------
387 // Gets the first parent that is a lexical block, function or inlined
388 // subroutine, or compile unit.
389 //----------------------------------------------------------------------
391 SymbolFileDWARF::GetParentSymbolContextDIE(const DWARFDIE &child_die) {
393 for (die = child_die.GetParent(); die; die = die.GetParent()) {
394 dw_tag_t tag = die.Tag();
397 case DW_TAG_compile_unit:
398 case DW_TAG_partial_unit:
399 case DW_TAG_subprogram:
400 case DW_TAG_inlined_subroutine:
401 case DW_TAG_lexical_block:
408 SymbolFileDWARF::SymbolFileDWARF(ObjectFile *objfile)
409 : SymbolFile(objfile), UserID(uint64_t(DW_INVALID_OFFSET)
410 << 32), // Used by SymbolFileDWARFDebugMap to
411 // when this class parses .o files to
412 // contain the .o file index/ID
413 m_debug_map_module_wp(), m_debug_map_symfile(NULL), m_data_debug_abbrev(),
414 m_data_debug_aranges(), m_data_debug_frame(), m_data_debug_info(),
415 m_data_debug_line(), m_data_debug_macro(), m_data_debug_loc(),
416 m_data_debug_ranges(), m_data_debug_rnglists(), m_data_debug_str(),
417 m_data_apple_names(), m_data_apple_types(), m_data_apple_namespaces(),
418 m_abbr(), m_info(), m_line(), m_fetched_external_modules(false),
419 m_supports_DW_AT_APPLE_objc_complete_type(eLazyBoolCalculate), m_ranges(),
420 m_unique_ast_type_map() {}
422 SymbolFileDWARF::~SymbolFileDWARF() {}
424 static const ConstString &GetDWARFMachOSegmentName() {
425 static ConstString g_dwarf_section_name("__DWARF");
426 return g_dwarf_section_name;
429 UniqueDWARFASTTypeMap &SymbolFileDWARF::GetUniqueDWARFASTTypeMap() {
430 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
431 if (debug_map_symfile)
432 return debug_map_symfile->GetUniqueDWARFASTTypeMap();
434 return m_unique_ast_type_map;
437 TypeSystem *SymbolFileDWARF::GetTypeSystemForLanguage(LanguageType language) {
438 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
439 TypeSystem *type_system;
440 if (debug_map_symfile) {
441 type_system = debug_map_symfile->GetTypeSystemForLanguage(language);
443 type_system = m_obj_file->GetModule()->GetTypeSystemForLanguage(language);
445 type_system->SetSymbolFile(this);
450 void SymbolFileDWARF::InitializeObject() {
451 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO);
452 ModuleSP module_sp(m_obj_file->GetModule());
454 const SectionList *section_list = module_sp->GetSectionList();
456 section_list->FindSectionByName(GetDWARFMachOSegmentName()).get();
459 m_obj_file->ReadSectionData(section, m_dwarf_data);
462 if (!GetGlobalPluginProperties()->IgnoreFileIndexes()) {
463 DWARFDataExtractor apple_names, apple_namespaces, apple_types, apple_objc;
464 LoadSectionData(eSectionTypeDWARFAppleNames, apple_names);
465 LoadSectionData(eSectionTypeDWARFAppleNamespaces, apple_namespaces);
466 LoadSectionData(eSectionTypeDWARFAppleTypes, apple_types);
467 LoadSectionData(eSectionTypeDWARFAppleObjC, apple_objc);
469 m_index = AppleDWARFIndex::Create(
470 *GetObjectFile()->GetModule(), apple_names, apple_namespaces,
471 apple_types, apple_objc, get_debug_str_data());
476 DWARFDataExtractor debug_names;
477 LoadSectionData(eSectionTypeDWARFDebugNames, debug_names);
478 if (debug_names.GetByteSize() > 0) {
479 llvm::Expected<std::unique_ptr<DebugNamesDWARFIndex>> index_or =
480 DebugNamesDWARFIndex::Create(*GetObjectFile()->GetModule(),
481 debug_names, get_debug_str_data(),
484 m_index = std::move(*index_or);
487 LLDB_LOG_ERROR(log, index_or.takeError(),
488 "Unable to read .debug_names data: {0}");
492 m_index = llvm::make_unique<ManualDWARFIndex>(*GetObjectFile()->GetModule(),
496 bool SymbolFileDWARF::SupportedVersion(uint16_t version) {
497 return version >= 2 && version <= 5;
500 uint32_t SymbolFileDWARF::CalculateAbilities() {
501 uint32_t abilities = 0;
502 if (m_obj_file != NULL) {
503 const Section *section = NULL;
504 const SectionList *section_list = m_obj_file->GetSectionList();
505 if (section_list == NULL)
508 // On non Apple platforms we might have .debug_types debug info that is
509 // created by using "-fdebug-types-section". LLDB currently will try to
510 // load this debug info, but it causes crashes during debugging when types
511 // are missing since it doesn't know how to parse the info in the
512 // .debug_types type units. This causes all complex debug info types to be
513 // unresolved. Because this causes LLDB to crash and since it really
514 // doesn't provide a solid debuggiung experience, we should disable trying
515 // to debug this kind of DWARF until support gets added or deprecated.
516 if (section_list->FindSectionByName(ConstString(".debug_types"))) {
517 m_obj_file->GetModule()->ReportWarning(
518 "lldb doesn’t support .debug_types debug info");
522 uint64_t debug_abbrev_file_size = 0;
523 uint64_t debug_info_file_size = 0;
524 uint64_t debug_line_file_size = 0;
526 section = section_list->FindSectionByName(GetDWARFMachOSegmentName()).get();
529 section_list = §ion->GetChildren();
532 section_list->FindSectionByType(eSectionTypeDWARFDebugInfo, true).get();
533 if (section != NULL) {
534 debug_info_file_size = section->GetFileSize();
537 section_list->FindSectionByType(eSectionTypeDWARFDebugAbbrev, true)
540 debug_abbrev_file_size = section->GetFileSize();
542 DWARFDebugAbbrev *abbrev = DebugAbbrev();
544 std::set<dw_form_t> invalid_forms;
545 abbrev->GetUnsupportedForms(invalid_forms);
546 if (!invalid_forms.empty()) {
548 error.Printf("unsupported DW_FORM value%s:", invalid_forms.size() > 1 ? "s" : "");
549 for (auto form : invalid_forms)
550 error.Printf(" %#x", form);
551 m_obj_file->GetModule()->ReportWarning("%s", error.GetString().str().c_str());
557 section_list->FindSectionByType(eSectionTypeDWARFDebugLine, true)
560 debug_line_file_size = section->GetFileSize();
562 const char *symfile_dir_cstr =
563 m_obj_file->GetFileSpec().GetDirectory().GetCString();
564 if (symfile_dir_cstr) {
565 if (strcasestr(symfile_dir_cstr, ".dsym")) {
566 if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo) {
567 // We have a dSYM file that didn't have a any debug info. If the
568 // string table has a size of 1, then it was made from an
569 // executable with no debug info, or from an executable that was
572 section_list->FindSectionByType(eSectionTypeDWARFDebugStr, true)
574 if (section && section->GetFileSize() == 1) {
575 m_obj_file->GetModule()->ReportWarning(
576 "empty dSYM file detected, dSYM was created with an "
577 "executable with no debug info.");
584 if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
585 abilities |= CompileUnits | Functions | Blocks | GlobalVariables |
586 LocalVariables | VariableTypes;
588 if (debug_line_file_size > 0)
589 abilities |= LineTables;
594 const DWARFDataExtractor &
595 SymbolFileDWARF::GetCachedSectionData(lldb::SectionType sect_type,
596 DWARFDataSegment &data_segment) {
597 llvm::call_once(data_segment.m_flag, [this, sect_type, &data_segment] {
598 this->LoadSectionData(sect_type, std::ref(data_segment.m_data));
600 return data_segment.m_data;
603 void SymbolFileDWARF::LoadSectionData(lldb::SectionType sect_type,
604 DWARFDataExtractor &data) {
605 ModuleSP module_sp(m_obj_file->GetModule());
606 const SectionList *section_list = module_sp->GetSectionList();
608 SectionSP section_sp(section_list->FindSectionByType(sect_type, true));
610 // See if we memory mapped the DWARF segment?
611 if (m_dwarf_data.GetByteSize()) {
612 data.SetData(m_dwarf_data, section_sp->GetOffset(),
613 section_sp->GetFileSize());
615 if (m_obj_file->ReadSectionData(section_sp.get(), data) == 0)
622 const DWARFDataExtractor &SymbolFileDWARF::get_debug_abbrev_data() {
623 return GetCachedSectionData(eSectionTypeDWARFDebugAbbrev,
624 m_data_debug_abbrev);
627 const DWARFDataExtractor &SymbolFileDWARF::get_debug_addr_data() {
628 return GetCachedSectionData(eSectionTypeDWARFDebugAddr, m_data_debug_addr);
631 const DWARFDataExtractor &SymbolFileDWARF::get_debug_aranges_data() {
632 return GetCachedSectionData(eSectionTypeDWARFDebugAranges,
633 m_data_debug_aranges);
636 const DWARFDataExtractor &SymbolFileDWARF::get_debug_frame_data() {
637 return GetCachedSectionData(eSectionTypeDWARFDebugFrame, m_data_debug_frame);
640 const DWARFDataExtractor &SymbolFileDWARF::get_debug_info_data() {
641 return GetCachedSectionData(eSectionTypeDWARFDebugInfo, m_data_debug_info);
644 const DWARFDataExtractor &SymbolFileDWARF::get_debug_line_data() {
645 return GetCachedSectionData(eSectionTypeDWARFDebugLine, m_data_debug_line);
648 const DWARFDataExtractor &SymbolFileDWARF::get_debug_line_str_data() {
649 return GetCachedSectionData(eSectionTypeDWARFDebugLineStr, m_data_debug_line_str);
652 const DWARFDataExtractor &SymbolFileDWARF::get_debug_macro_data() {
653 return GetCachedSectionData(eSectionTypeDWARFDebugMacro, m_data_debug_macro);
656 const DWARFDataExtractor &SymbolFileDWARF::DebugLocData() {
657 const DWARFDataExtractor &debugLocData = get_debug_loc_data();
658 if (debugLocData.GetByteSize() > 0)
660 return get_debug_loclists_data();
663 const DWARFDataExtractor &SymbolFileDWARF::get_debug_loc_data() {
664 return GetCachedSectionData(eSectionTypeDWARFDebugLoc, m_data_debug_loc);
667 const DWARFDataExtractor &SymbolFileDWARF::get_debug_loclists_data() {
668 return GetCachedSectionData(eSectionTypeDWARFDebugLocLists,
669 m_data_debug_loclists);
672 const DWARFDataExtractor &SymbolFileDWARF::get_debug_ranges_data() {
673 return GetCachedSectionData(eSectionTypeDWARFDebugRanges,
674 m_data_debug_ranges);
677 const DWARFDataExtractor &SymbolFileDWARF::get_debug_rnglists_data() {
678 return GetCachedSectionData(eSectionTypeDWARFDebugRngLists,
679 m_data_debug_rnglists);
682 const DWARFDataExtractor &SymbolFileDWARF::get_debug_str_data() {
683 return GetCachedSectionData(eSectionTypeDWARFDebugStr, m_data_debug_str);
686 const DWARFDataExtractor &SymbolFileDWARF::get_debug_str_offsets_data() {
687 return GetCachedSectionData(eSectionTypeDWARFDebugStrOffsets,
688 m_data_debug_str_offsets);
691 const DWARFDataExtractor &SymbolFileDWARF::get_debug_types_data() {
692 return GetCachedSectionData(eSectionTypeDWARFDebugTypes, m_data_debug_types);
695 const DWARFDataExtractor &SymbolFileDWARF::get_apple_names_data() {
696 return GetCachedSectionData(eSectionTypeDWARFAppleNames, m_data_apple_names);
699 const DWARFDataExtractor &SymbolFileDWARF::get_apple_types_data() {
700 return GetCachedSectionData(eSectionTypeDWARFAppleTypes, m_data_apple_types);
703 const DWARFDataExtractor &SymbolFileDWARF::get_apple_namespaces_data() {
704 return GetCachedSectionData(eSectionTypeDWARFAppleNamespaces,
705 m_data_apple_namespaces);
708 const DWARFDataExtractor &SymbolFileDWARF::get_apple_objc_data() {
709 return GetCachedSectionData(eSectionTypeDWARFAppleObjC, m_data_apple_objc);
712 const DWARFDataExtractor &SymbolFileDWARF::get_gnu_debugaltlink() {
713 return GetCachedSectionData(eSectionTypeDWARFGNUDebugAltLink,
714 m_data_gnu_debugaltlink);
717 DWARFDebugAbbrev *SymbolFileDWARF::DebugAbbrev() {
718 if (m_abbr.get() == NULL) {
719 const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
720 if (debug_abbrev_data.GetByteSize() > 0) {
721 m_abbr.reset(new DWARFDebugAbbrev());
723 m_abbr->Parse(debug_abbrev_data);
729 const DWARFDebugAbbrev *SymbolFileDWARF::DebugAbbrev() const {
733 DWARFDebugInfo *SymbolFileDWARF::DebugInfo() {
734 if (m_info.get() == NULL) {
735 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
736 Timer scoped_timer(func_cat, "%s this = %p", LLVM_PRETTY_FUNCTION,
737 static_cast<void *>(this));
738 if (get_debug_info_data().GetByteSize() > 0) {
739 m_info.reset(new DWARFDebugInfo());
741 m_info->SetDwarfData(this);
748 const DWARFDebugInfo *SymbolFileDWARF::DebugInfo() const {
753 SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
757 DWARFDebugInfo *info = DebugInfo();
759 // Just a normal DWARF file whose user ID for the compile unit is the DWARF
762 DWARFUnit *dwarf_cu =
763 info->GetCompileUnit((dw_offset_t)comp_unit->GetID());
764 if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
765 dwarf_cu->SetUserData(comp_unit);
771 DWARFDebugRangesBase *SymbolFileDWARF::DebugRanges() {
772 if (m_ranges.get() == NULL) {
773 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
774 Timer scoped_timer(func_cat, "%s this = %p", LLVM_PRETTY_FUNCTION,
775 static_cast<void *>(this));
777 if (get_debug_ranges_data().GetByteSize() > 0)
778 m_ranges.reset(new DWARFDebugRanges());
779 else if (get_debug_rnglists_data().GetByteSize() > 0)
780 m_ranges.reset(new DWARFDebugRngLists());
783 m_ranges->Extract(this);
785 return m_ranges.get();
788 const DWARFDebugRangesBase *SymbolFileDWARF::DebugRanges() const {
789 return m_ranges.get();
792 lldb::CompUnitSP SymbolFileDWARF::ParseCompileUnit(DWARFUnit *dwarf_cu,
796 CompileUnit *comp_unit = (CompileUnit *)dwarf_cu->GetUserData();
798 // We already parsed this compile unit, had out a shared pointer to it
799 cu_sp = comp_unit->shared_from_this();
801 if (dwarf_cu->GetSymbolFileDWARF() != this) {
802 return dwarf_cu->GetSymbolFileDWARF()->ParseCompileUnit(dwarf_cu,
804 } else if (dwarf_cu->GetOffset() == 0 && GetDebugMapSymfile()) {
805 // Let the debug map create the compile unit
806 cu_sp = m_debug_map_symfile->GetCompileUnit(this);
807 dwarf_cu->SetUserData(cu_sp.get());
809 ModuleSP module_sp(m_obj_file->GetModule());
811 const DWARFDIE cu_die = dwarf_cu->DIE();
813 FileSpec cu_file_spec(cu_die.GetName());
815 // If we have a full path to the compile unit, we don't need to
816 // resolve the file. This can be expensive e.g. when the source
819 if (cu_file_spec.IsRelative()) {
820 const char *cu_comp_dir{
821 cu_die.GetAttributeValueAsString(DW_AT_comp_dir, nullptr)};
822 cu_file_spec.PrependPathComponent(resolveCompDir(cu_comp_dir));
825 std::string remapped_file;
826 if (module_sp->RemapSourceFile(cu_file_spec.GetPath(),
828 cu_file_spec.SetFile(remapped_file, FileSpec::Style::native);
831 LanguageType cu_language = DWARFUnit::LanguageTypeFromDWARF(
832 cu_die.GetAttributeValueAsUnsigned(DW_AT_language, 0));
834 bool is_optimized = dwarf_cu->GetIsOptimized();
835 cu_sp.reset(new CompileUnit(
836 module_sp, dwarf_cu, cu_file_spec, dwarf_cu->GetID(),
837 cu_language, is_optimized ? eLazyBoolYes : eLazyBoolNo));
839 // If we just created a compile unit with an invalid file spec,
840 // try and get the first entry in the supports files from the
841 // line table as that should be the compile unit.
843 cu_file_spec = cu_sp->GetSupportFiles().GetFileSpecAtIndex(1);
845 (FileSpec &)(*cu_sp) = cu_file_spec;
846 // Also fix the invalid file spec which was copied from the
848 cu_sp->GetSupportFiles().Replace(0, cu_file_spec);
852 dwarf_cu->SetUserData(cu_sp.get());
854 // Figure out the compile unit index if we weren't given one
855 if (cu_idx == UINT32_MAX)
856 DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
858 m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(
869 uint32_t SymbolFileDWARF::GetNumCompileUnits() {
870 DWARFDebugInfo *info = DebugInfo();
872 return info->GetNumCompileUnits();
876 CompUnitSP SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx) {
877 ASSERT_MODULE_LOCK(this);
879 DWARFDebugInfo *info = DebugInfo();
881 DWARFUnit *dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
883 cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
888 Function *SymbolFileDWARF::ParseFunction(CompileUnit &comp_unit,
889 const DWARFDIE &die) {
890 ASSERT_MODULE_LOCK(this);
892 TypeSystem *type_system =
893 GetTypeSystemForLanguage(die.GetCU()->GetLanguageType());
896 DWARFASTParser *dwarf_ast = type_system->GetDWARFParser();
898 return dwarf_ast->ParseFunctionFromDWARF(comp_unit, die);
904 bool SymbolFileDWARF::FixupAddress(Address &addr) {
905 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
906 if (debug_map_symfile) {
907 return debug_map_symfile->LinkOSOAddress(addr);
909 // This is a normal DWARF file, no address fixups need to happen
912 lldb::LanguageType SymbolFileDWARF::ParseLanguage(CompileUnit &comp_unit) {
913 ASSERT_MODULE_LOCK(this);
914 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
916 return dwarf_cu->GetLanguageType();
918 return eLanguageTypeUnknown;
921 size_t SymbolFileDWARF::ParseFunctions(CompileUnit &comp_unit) {
922 ASSERT_MODULE_LOCK(this);
923 size_t functions_added = 0;
924 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
926 DWARFDIECollection function_dies;
927 const size_t num_functions =
928 dwarf_cu->AppendDIEsWithTag(DW_TAG_subprogram, function_dies);
930 for (func_idx = 0; func_idx < num_functions; ++func_idx) {
931 DWARFDIE die = function_dies.GetDIEAtIndex(func_idx);
932 if (comp_unit.FindFunctionByUID(die.GetID()).get() == NULL) {
933 if (ParseFunction(comp_unit, die))
939 return functions_added;
942 bool SymbolFileDWARF::ParseSupportFiles(CompileUnit &comp_unit,
943 FileSpecList &support_files) {
944 ASSERT_MODULE_LOCK(this);
945 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
947 const DWARFBaseDIE cu_die = dwarf_cu->GetUnitDIEOnly();
950 FileSpec cu_comp_dir = resolveCompDir(
951 cu_die.GetAttributeValueAsString(DW_AT_comp_dir, nullptr));
952 const dw_offset_t stmt_list = cu_die.GetAttributeValueAsUnsigned(
953 DW_AT_stmt_list, DW_INVALID_OFFSET);
954 if (stmt_list != DW_INVALID_OFFSET) {
955 // All file indexes in DWARF are one based and a file of index zero is
956 // supposed to be the compile unit itself.
957 support_files.Append(comp_unit);
958 return DWARFDebugLine::ParseSupportFiles(
959 comp_unit.GetModule(), get_debug_line_data(), cu_comp_dir,
960 stmt_list, support_files, dwarf_cu);
967 bool SymbolFileDWARF::ParseIsOptimized(CompileUnit &comp_unit) {
968 ASSERT_MODULE_LOCK(this);
969 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
971 return dwarf_cu->GetIsOptimized();
975 bool SymbolFileDWARF::ParseImportedModules(
976 const lldb_private::SymbolContext &sc,
977 std::vector<lldb_private::ConstString> &imported_modules) {
978 ASSERT_MODULE_LOCK(this);
979 assert(sc.comp_unit);
980 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
982 if (ClangModulesDeclVendor::LanguageSupportsClangModules(
983 sc.comp_unit->GetLanguage())) {
984 UpdateExternalModuleListIfNeeded();
987 const DWARFDIE die = dwarf_cu->DIE();
990 for (DWARFDIE child_die = die.GetFirstChild(); child_die;
991 child_die = child_die.GetSibling()) {
992 if (child_die.Tag() == DW_TAG_imported_declaration) {
993 if (DWARFDIE module_die =
994 child_die.GetReferencedDIE(DW_AT_import)) {
995 if (module_die.Tag() == DW_TAG_module) {
996 if (const char *name = module_die.GetAttributeValueAsString(
997 DW_AT_name, nullptr)) {
998 ConstString const_name(name);
999 imported_modules.push_back(const_name);
1007 for (const auto &pair : m_external_type_modules) {
1008 imported_modules.push_back(pair.first);
1016 struct ParseDWARFLineTableCallbackInfo {
1017 LineTable *line_table;
1018 std::unique_ptr<LineSequence> sequence_ap;
1019 lldb::addr_t addr_mask;
1022 //----------------------------------------------------------------------
1023 // ParseStatementTableCallback
1024 //----------------------------------------------------------------------
1025 static void ParseDWARFLineTableCallback(dw_offset_t offset,
1026 const DWARFDebugLine::State &state,
1028 if (state.row == DWARFDebugLine::State::StartParsingLineTable) {
1029 // Just started parsing the line table
1030 } else if (state.row == DWARFDebugLine::State::DoneParsingLineTable) {
1031 // Done parsing line table, nothing to do for the cleanup
1033 ParseDWARFLineTableCallbackInfo *info =
1034 (ParseDWARFLineTableCallbackInfo *)userData;
1035 LineTable *line_table = info->line_table;
1037 // If this is our first time here, we need to create a sequence container.
1038 if (!info->sequence_ap.get()) {
1039 info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
1040 assert(info->sequence_ap.get());
1042 line_table->AppendLineEntryToSequence(
1043 info->sequence_ap.get(), state.address & info->addr_mask, state.line,
1044 state.column, state.file, state.is_stmt, state.basic_block,
1045 state.prologue_end, state.epilogue_begin, state.end_sequence);
1046 if (state.end_sequence) {
1047 // First, put the current sequence into the line table.
1048 line_table->InsertSequence(info->sequence_ap.get());
1049 // Then, empty it to prepare for the next sequence.
1050 info->sequence_ap->Clear();
1055 bool SymbolFileDWARF::ParseLineTable(CompileUnit &comp_unit) {
1056 ASSERT_MODULE_LOCK(this);
1057 if (comp_unit.GetLineTable() != NULL)
1060 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
1062 const DWARFBaseDIE dwarf_cu_die = dwarf_cu->GetUnitDIEOnly();
1064 const dw_offset_t cu_line_offset =
1065 dwarf_cu_die.GetAttributeValueAsUnsigned(DW_AT_stmt_list,
1067 if (cu_line_offset != DW_INVALID_OFFSET) {
1068 std::unique_ptr<LineTable> line_table_ap(new LineTable(&comp_unit));
1069 if (line_table_ap.get()) {
1070 ParseDWARFLineTableCallbackInfo info;
1071 info.line_table = line_table_ap.get();
1075 * The SymbolContext may not have a valid target, thus we may not be
1077 * to call Address::GetOpcodeLoadAddress() which would clear the bit
1079 * for MIPS. Use ArchSpec to clear the bit #0.
1081 switch (GetObjectFile()->GetArchitecture().GetMachine()) {
1082 case llvm::Triple::mips:
1083 case llvm::Triple::mipsel:
1084 case llvm::Triple::mips64:
1085 case llvm::Triple::mips64el:
1086 info.addr_mask = ~((lldb::addr_t)1);
1089 info.addr_mask = ~((lldb::addr_t)0);
1093 lldb::offset_t offset = cu_line_offset;
1094 DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset,
1095 ParseDWARFLineTableCallback,
1097 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
1098 if (debug_map_symfile) {
1099 // We have an object file that has a line table with addresses that
1100 // are not linked. We need to link the line table and convert the
1101 // addresses that are relative to the .o file into addresses for
1102 // the main executable.
1103 comp_unit.SetLineTable(
1104 debug_map_symfile->LinkOSOLineTable(this, line_table_ap.get()));
1106 comp_unit.SetLineTable(line_table_ap.release());
1116 lldb_private::DebugMacrosSP
1117 SymbolFileDWARF::ParseDebugMacros(lldb::offset_t *offset) {
1118 auto iter = m_debug_macros_map.find(*offset);
1119 if (iter != m_debug_macros_map.end())
1120 return iter->second;
1122 const DWARFDataExtractor &debug_macro_data = get_debug_macro_data();
1123 if (debug_macro_data.GetByteSize() == 0)
1124 return DebugMacrosSP();
1126 lldb_private::DebugMacrosSP debug_macros_sp(new lldb_private::DebugMacros());
1127 m_debug_macros_map[*offset] = debug_macros_sp;
1129 const DWARFDebugMacroHeader &header =
1130 DWARFDebugMacroHeader::ParseHeader(debug_macro_data, offset);
1131 DWARFDebugMacroEntry::ReadMacroEntries(debug_macro_data, get_debug_str_data(),
1132 header.OffsetIs64Bit(), offset, this,
1135 return debug_macros_sp;
1138 bool SymbolFileDWARF::ParseDebugMacros(CompileUnit &comp_unit) {
1139 ASSERT_MODULE_LOCK(this);
1141 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
1142 if (dwarf_cu == nullptr)
1145 const DWARFBaseDIE dwarf_cu_die = dwarf_cu->GetUnitDIEOnly();
1149 lldb::offset_t sect_offset =
1150 dwarf_cu_die.GetAttributeValueAsUnsigned(DW_AT_macros, DW_INVALID_OFFSET);
1151 if (sect_offset == DW_INVALID_OFFSET)
1152 sect_offset = dwarf_cu_die.GetAttributeValueAsUnsigned(DW_AT_GNU_macros,
1154 if (sect_offset == DW_INVALID_OFFSET)
1157 comp_unit.SetDebugMacros(ParseDebugMacros(§_offset));
1162 size_t SymbolFileDWARF::ParseBlocksRecursive(
1163 lldb_private::CompileUnit &comp_unit, Block *parent_block,
1164 const DWARFDIE &orig_die, addr_t subprogram_low_pc, uint32_t depth) {
1165 size_t blocks_added = 0;
1166 DWARFDIE die = orig_die;
1168 dw_tag_t tag = die.Tag();
1171 case DW_TAG_inlined_subroutine:
1172 case DW_TAG_subprogram:
1173 case DW_TAG_lexical_block: {
1174 Block *block = NULL;
1175 if (tag == DW_TAG_subprogram) {
1176 // Skip any DW_TAG_subprogram DIEs that are inside of a normal or
1177 // inlined functions. These will be parsed on their own as separate
1183 block = parent_block;
1185 BlockSP block_sp(new Block(die.GetID()));
1186 parent_block->AddChild(block_sp);
1187 block = block_sp.get();
1189 DWARFRangeList ranges;
1190 const char *name = NULL;
1191 const char *mangled_name = NULL;
1195 int decl_column = 0;
1198 int call_column = 0;
1199 if (die.GetDIENamesAndRanges(name, mangled_name, ranges, decl_file,
1200 decl_line, decl_column, call_file, call_line,
1201 call_column, nullptr)) {
1202 if (tag == DW_TAG_subprogram) {
1203 assert(subprogram_low_pc == LLDB_INVALID_ADDRESS);
1204 subprogram_low_pc = ranges.GetMinRangeBase(0);
1205 } else if (tag == DW_TAG_inlined_subroutine) {
1206 // We get called here for inlined subroutines in two ways. The first
1207 // time is when we are making the Function object for this inlined
1208 // concrete instance. Since we're creating a top level block at
1209 // here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS. So we
1210 // need to adjust the containing address. The second time is when we
1211 // are parsing the blocks inside the function that contains the
1212 // inlined concrete instance. Since these will be blocks inside the
1213 // containing "real" function the offset will be for that function.
1214 if (subprogram_low_pc == LLDB_INVALID_ADDRESS) {
1215 subprogram_low_pc = ranges.GetMinRangeBase(0);
1219 const size_t num_ranges = ranges.GetSize();
1220 for (size_t i = 0; i < num_ranges; ++i) {
1221 const DWARFRangeList::Entry &range = ranges.GetEntryRef(i);
1222 const addr_t range_base = range.GetRangeBase();
1223 if (range_base >= subprogram_low_pc)
1224 block->AddRange(Block::Range(range_base - subprogram_low_pc,
1225 range.GetByteSize()));
1227 GetObjectFile()->GetModule()->ReportError(
1228 "0x%8.8" PRIx64 ": adding range [0x%" PRIx64 "-0x%" PRIx64
1229 ") which has a base that is less than the function's low PC "
1230 "0x%" PRIx64 ". Please file a bug and attach the file at the "
1231 "start of this error message",
1232 block->GetID(), range_base, range.GetRangeEnd(),
1236 block->FinalizeRanges();
1238 if (tag != DW_TAG_subprogram &&
1239 (name != NULL || mangled_name != NULL)) {
1240 std::unique_ptr<Declaration> decl_ap;
1241 if (decl_file != 0 || decl_line != 0 || decl_column != 0)
1242 decl_ap.reset(new Declaration(
1243 comp_unit.GetSupportFiles().GetFileSpecAtIndex(decl_file),
1244 decl_line, decl_column));
1246 std::unique_ptr<Declaration> call_ap;
1247 if (call_file != 0 || call_line != 0 || call_column != 0)
1248 call_ap.reset(new Declaration(
1249 comp_unit.GetSupportFiles().GetFileSpecAtIndex(call_file),
1250 call_line, call_column));
1252 block->SetInlinedFunctionInfo(name, mangled_name, decl_ap.get(),
1258 if (die.HasChildren()) {
1260 ParseBlocksRecursive(comp_unit, block, die.GetFirstChild(),
1261 subprogram_low_pc, depth + 1);
1269 // Only parse siblings of the block if we are not at depth zero. A depth of
1270 // zero indicates we are currently parsing the top level DW_TAG_subprogram
1276 die = die.GetSibling();
1278 return blocks_added;
1281 bool SymbolFileDWARF::ClassOrStructIsVirtual(const DWARFDIE &parent_die) {
1283 for (DWARFDIE die = parent_die.GetFirstChild(); die;
1284 die = die.GetSibling()) {
1285 dw_tag_t tag = die.Tag();
1286 bool check_virtuality = false;
1288 case DW_TAG_inheritance:
1289 case DW_TAG_subprogram:
1290 check_virtuality = true;
1295 if (check_virtuality) {
1296 if (die.GetAttributeValueAsUnsigned(DW_AT_virtuality, 0) != 0)
1304 void SymbolFileDWARF::ParseDeclsForContext(CompilerDeclContext decl_ctx) {
1305 TypeSystem *type_system = decl_ctx.GetTypeSystem();
1306 DWARFASTParser *ast_parser = type_system->GetDWARFParser();
1307 std::vector<DWARFDIE> decl_ctx_die_list =
1308 ast_parser->GetDIEForDeclContext(decl_ctx);
1310 for (DWARFDIE decl_ctx_die : decl_ctx_die_list)
1311 for (DWARFDIE decl = decl_ctx_die.GetFirstChild(); decl;
1312 decl = decl.GetSibling())
1313 ast_parser->GetDeclForUIDFromDWARF(decl);
1316 SymbolFileDWARF *SymbolFileDWARF::GetDWARFForUID(lldb::user_id_t uid) {
1317 // This method can be called without going through the symbol vendor so we
1318 // need to lock the module.
1319 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1320 // Anytime we get a "lldb::user_id_t" from an lldb_private::SymbolFile API we
1321 // must make sure we use the correct DWARF file when resolving things. On
1322 // MacOSX, when using SymbolFileDWARFDebugMap, we will use multiple
1323 // SymbolFileDWARF classes, one for each .o file. We can often end up with
1324 // references to other DWARF objects and we must be ready to receive a
1325 // "lldb::user_id_t" that specifies a DIE from another SymbolFileDWARF
1327 SymbolFileDWARFDebugMap *debug_map = GetDebugMapSymfile();
1329 return debug_map->GetSymbolFileByOSOIndex(
1330 debug_map->GetOSOIndexFromUserID(uid));
1335 SymbolFileDWARF::GetDIEFromUID(lldb::user_id_t uid) {
1336 // This method can be called without going through the symbol vendor so we
1337 // need to lock the module.
1338 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1339 // Anytime we get a "lldb::user_id_t" from an lldb_private::SymbolFile API we
1340 // must make sure we use the correct DWARF file when resolving things. On
1341 // MacOSX, when using SymbolFileDWARFDebugMap, we will use multiple
1342 // SymbolFileDWARF classes, one for each .o file. We can often end up with
1343 // references to other DWARF objects and we must be ready to receive a
1344 // "lldb::user_id_t" that specifies a DIE from another SymbolFileDWARF
1346 SymbolFileDWARF *dwarf = GetDWARFForUID(uid);
1348 return dwarf->GetDIE(DIERef(uid, dwarf));
1352 CompilerDecl SymbolFileDWARF::GetDeclForUID(lldb::user_id_t type_uid) {
1353 // This method can be called without going through the symbol vendor so we
1354 // need to lock the module.
1355 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1356 // Anytime we have a lldb::user_id_t, we must get the DIE by calling
1357 // SymbolFileDWARF::GetDIEFromUID(). See comments inside the
1358 // SymbolFileDWARF::GetDIEFromUID() for details.
1359 DWARFDIE die = GetDIEFromUID(type_uid);
1361 return die.GetDecl();
1362 return CompilerDecl();
1366 SymbolFileDWARF::GetDeclContextForUID(lldb::user_id_t type_uid) {
1367 // This method can be called without going through the symbol vendor so we
1368 // need to lock the module.
1369 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1370 // Anytime we have a lldb::user_id_t, we must get the DIE by calling
1371 // SymbolFileDWARF::GetDIEFromUID(). See comments inside the
1372 // SymbolFileDWARF::GetDIEFromUID() for details.
1373 DWARFDIE die = GetDIEFromUID(type_uid);
1375 return die.GetDeclContext();
1376 return CompilerDeclContext();
1380 SymbolFileDWARF::GetDeclContextContainingUID(lldb::user_id_t type_uid) {
1381 // This method can be called without going through the symbol vendor so we
1382 // need to lock the module.
1383 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1384 // Anytime we have a lldb::user_id_t, we must get the DIE by calling
1385 // SymbolFileDWARF::GetDIEFromUID(). See comments inside the
1386 // SymbolFileDWARF::GetDIEFromUID() for details.
1387 DWARFDIE die = GetDIEFromUID(type_uid);
1389 return die.GetContainingDeclContext();
1390 return CompilerDeclContext();
1393 Type *SymbolFileDWARF::ResolveTypeUID(lldb::user_id_t type_uid) {
1394 // This method can be called without going through the symbol vendor so we
1395 // need to lock the module.
1396 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1397 // Anytime we have a lldb::user_id_t, we must get the DIE by calling
1398 // SymbolFileDWARF::GetDIEFromUID(). See comments inside the
1399 // SymbolFileDWARF::GetDIEFromUID() for details.
1400 DWARFDIE type_die = GetDIEFromUID(type_uid);
1402 return type_die.ResolveType();
1407 llvm::Optional<SymbolFile::ArrayInfo>
1408 SymbolFileDWARF::GetDynamicArrayInfoForUID(
1409 lldb::user_id_t type_uid, const lldb_private::ExecutionContext *exe_ctx) {
1410 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1411 DWARFDIE type_die = GetDIEFromUID(type_uid);
1413 return DWARFASTParser::ParseChildArrayInfo(type_die, exe_ctx);
1418 Type *SymbolFileDWARF::ResolveTypeUID(const DIERef &die_ref) {
1419 return ResolveType(GetDIE(die_ref), true);
1422 Type *SymbolFileDWARF::ResolveTypeUID(const DWARFDIE &die,
1423 bool assert_not_being_parsed) {
1425 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
1427 GetObjectFile()->GetModule()->LogMessage(
1428 log, "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
1429 die.GetOffset(), die.GetTagAsCString(), die.GetName());
1431 // We might be coming in in the middle of a type tree (a class within a
1432 // class, an enum within a class), so parse any needed parent DIEs before
1433 // we get to this one...
1434 DWARFDIE decl_ctx_die = GetDeclContextDIEContainingDIE(die);
1437 switch (decl_ctx_die.Tag()) {
1438 case DW_TAG_structure_type:
1439 case DW_TAG_union_type:
1440 case DW_TAG_class_type: {
1441 // Get the type, which could be a forward declaration
1443 GetObjectFile()->GetModule()->LogMessage(
1444 log, "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' "
1445 "resolve parent forward type for 0x%8.8x",
1446 die.GetOffset(), die.GetTagAsCString(), die.GetName(),
1447 decl_ctx_die.GetOffset());
1455 return ResolveType(die);
1460 // This function is used when SymbolFileDWARFDebugMap owns a bunch of
1461 // SymbolFileDWARF objects to detect if this DWARF file is the one that can
1462 // resolve a compiler_type.
1463 bool SymbolFileDWARF::HasForwardDeclForClangType(
1464 const CompilerType &compiler_type) {
1465 CompilerType compiler_type_no_qualifiers =
1466 ClangUtil::RemoveFastQualifiers(compiler_type);
1467 if (GetForwardDeclClangTypeToDie().count(
1468 compiler_type_no_qualifiers.GetOpaqueQualType())) {
1471 TypeSystem *type_system = compiler_type.GetTypeSystem();
1473 ClangASTContext *clang_type_system =
1474 llvm::dyn_cast_or_null<ClangASTContext>(type_system);
1475 if (!clang_type_system)
1477 DWARFASTParserClang *ast_parser =
1478 static_cast<DWARFASTParserClang *>(clang_type_system->GetDWARFParser());
1479 return ast_parser->GetClangASTImporter().CanImport(compiler_type);
1482 bool SymbolFileDWARF::CompleteType(CompilerType &compiler_type) {
1483 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
1485 ClangASTContext *clang_type_system =
1486 llvm::dyn_cast_or_null<ClangASTContext>(compiler_type.GetTypeSystem());
1487 if (clang_type_system) {
1488 DWARFASTParserClang *ast_parser =
1489 static_cast<DWARFASTParserClang *>(clang_type_system->GetDWARFParser());
1491 ast_parser->GetClangASTImporter().CanImport(compiler_type))
1492 return ast_parser->GetClangASTImporter().CompleteType(compiler_type);
1495 // We have a struct/union/class/enum that needs to be fully resolved.
1496 CompilerType compiler_type_no_qualifiers =
1497 ClangUtil::RemoveFastQualifiers(compiler_type);
1498 auto die_it = GetForwardDeclClangTypeToDie().find(
1499 compiler_type_no_qualifiers.GetOpaqueQualType());
1500 if (die_it == GetForwardDeclClangTypeToDie().end()) {
1501 // We have already resolved this type...
1505 DWARFDIE dwarf_die = GetDIE(die_it->getSecond());
1507 // Once we start resolving this type, remove it from the forward
1508 // declaration map in case anyone child members or other types require this
1509 // type to get resolved. The type will get resolved when all of the calls
1510 // to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition are done.
1511 GetForwardDeclClangTypeToDie().erase(die_it);
1513 Type *type = GetDIEToType().lookup(dwarf_die.GetDIE());
1515 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO |
1516 DWARF_LOG_TYPE_COMPLETION));
1518 GetObjectFile()->GetModule()->LogMessageVerboseBacktrace(
1519 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
1520 dwarf_die.GetID(), dwarf_die.GetTagAsCString(),
1521 type->GetName().AsCString());
1522 assert(compiler_type);
1523 DWARFASTParser *dwarf_ast = dwarf_die.GetDWARFParser();
1525 return dwarf_ast->CompleteTypeFromDWARF(dwarf_die, type, compiler_type);
1530 Type *SymbolFileDWARF::ResolveType(const DWARFDIE &die,
1531 bool assert_not_being_parsed,
1532 bool resolve_function_context) {
1534 Type *type = GetTypeForDIE(die, resolve_function_context).get();
1536 if (assert_not_being_parsed) {
1537 if (type != DIE_IS_BEING_PARSED)
1540 GetObjectFile()->GetModule()->ReportError(
1541 "Parsing a die that is being parsed die: 0x%8.8x: %s %s",
1542 die.GetOffset(), die.GetTagAsCString(), die.GetName());
1551 SymbolFileDWARF::GetCompUnitForDWARFCompUnit(DWARFUnit *dwarf_cu,
1553 // Check if the symbol vendor already knows about this compile unit?
1554 if (dwarf_cu->GetUserData() == NULL) {
1555 // The symbol vendor doesn't know about this compile unit, we need to parse
1556 // and add it to the symbol vendor object.
1557 return ParseCompileUnit(dwarf_cu, cu_idx).get();
1559 return (CompileUnit *)dwarf_cu->GetUserData();
1562 size_t SymbolFileDWARF::GetObjCMethodDIEOffsets(ConstString class_name,
1563 DIEArray &method_die_offsets) {
1564 method_die_offsets.clear();
1565 m_index->GetObjCMethods(class_name, method_die_offsets);
1566 return method_die_offsets.size();
1569 bool SymbolFileDWARF::GetFunction(const DWARFDIE &die, SymbolContext &sc) {
1573 // Check if the symbol vendor already knows about this compile unit?
1574 sc.comp_unit = GetCompUnitForDWARFCompUnit(die.GetCU(), UINT32_MAX);
1576 sc.function = sc.comp_unit->FindFunctionByUID(die.GetID()).get();
1577 if (sc.function == NULL)
1578 sc.function = ParseFunction(*sc.comp_unit, die);
1581 sc.module_sp = sc.function->CalculateSymbolContextModule();
1589 lldb::ModuleSP SymbolFileDWARF::GetDWOModule(ConstString name) {
1590 UpdateExternalModuleListIfNeeded();
1591 const auto &pos = m_external_type_modules.find(name);
1592 if (pos != m_external_type_modules.end())
1595 return lldb::ModuleSP();
1599 SymbolFileDWARF::GetDIE(const DIERef &die_ref) {
1600 DWARFDebugInfo *debug_info = DebugInfo();
1602 return debug_info->GetDIE(die_ref);
1607 std::unique_ptr<SymbolFileDWARFDwo>
1608 SymbolFileDWARF::GetDwoSymbolFileForCompileUnit(
1609 DWARFUnit &dwarf_cu, const DWARFDebugInfoEntry &cu_die) {
1610 // If we are using a dSYM file, we never want the standard DWO files since
1611 // the -gmodules support uses the same DWO machanism to specify full debug
1612 // info files for modules.
1613 if (GetDebugMapSymfile())
1616 const char *dwo_name = cu_die.GetAttributeValueAsString(
1617 this, &dwarf_cu, DW_AT_GNU_dwo_name, nullptr);
1621 SymbolFileDWARFDwp *dwp_symfile = GetDwpSymbolFile();
1623 uint64_t dwo_id = cu_die.GetAttributeValueAsUnsigned(this, &dwarf_cu,
1624 DW_AT_GNU_dwo_id, 0);
1625 std::unique_ptr<SymbolFileDWARFDwo> dwo_symfile =
1626 dwp_symfile->GetSymbolFileForDwoId(&dwarf_cu, dwo_id);
1631 FileSpec dwo_file(dwo_name);
1632 FileSystem::Instance().Resolve(dwo_file);
1633 if (dwo_file.IsRelative()) {
1634 const char *comp_dir = cu_die.GetAttributeValueAsString(
1635 this, &dwarf_cu, DW_AT_comp_dir, nullptr);
1639 dwo_file.SetFile(comp_dir, FileSpec::Style::native);
1640 FileSystem::Instance().Resolve(dwo_file);
1641 dwo_file.AppendPathComponent(dwo_name);
1644 if (!FileSystem::Instance().Exists(dwo_file))
1647 const lldb::offset_t file_offset = 0;
1648 DataBufferSP dwo_file_data_sp;
1649 lldb::offset_t dwo_file_data_offset = 0;
1650 ObjectFileSP dwo_obj_file = ObjectFile::FindPlugin(
1651 GetObjectFile()->GetModule(), &dwo_file, file_offset,
1652 FileSystem::Instance().GetByteSize(dwo_file), dwo_file_data_sp,
1653 dwo_file_data_offset);
1654 if (dwo_obj_file == nullptr)
1657 return llvm::make_unique<SymbolFileDWARFDwo>(dwo_obj_file, &dwarf_cu);
1660 void SymbolFileDWARF::UpdateExternalModuleListIfNeeded() {
1661 if (m_fetched_external_modules)
1663 m_fetched_external_modules = true;
1665 DWARFDebugInfo *debug_info = DebugInfo();
1667 const uint32_t num_compile_units = GetNumCompileUnits();
1668 for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx) {
1669 DWARFUnit *dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
1671 const DWARFBaseDIE die = dwarf_cu->GetUnitDIEOnly();
1672 if (die && !die.HasChildren()) {
1673 const char *name = die.GetAttributeValueAsString(DW_AT_name, nullptr);
1676 ConstString const_name(name);
1677 if (m_external_type_modules.find(const_name) ==
1678 m_external_type_modules.end()) {
1680 const char *dwo_path =
1681 die.GetAttributeValueAsString(DW_AT_GNU_dwo_name, nullptr);
1683 ModuleSpec dwo_module_spec;
1684 dwo_module_spec.GetFileSpec().SetFile(dwo_path,
1685 FileSpec::Style::native);
1686 if (dwo_module_spec.GetFileSpec().IsRelative()) {
1687 const char *comp_dir =
1688 die.GetAttributeValueAsString(DW_AT_comp_dir, nullptr);
1690 dwo_module_spec.GetFileSpec().SetFile(comp_dir,
1691 FileSpec::Style::native);
1692 FileSystem::Instance().Resolve(dwo_module_spec.GetFileSpec());
1693 dwo_module_spec.GetFileSpec().AppendPathComponent(dwo_path);
1696 dwo_module_spec.GetArchitecture() =
1697 m_obj_file->GetModule()->GetArchitecture();
1699 // When LLDB loads "external" modules it looks at the presence of
1700 // DW_AT_GNU_dwo_name. However, when the already created module
1701 // (corresponding to .dwo itself) is being processed, it will see
1702 // the presence of DW_AT_GNU_dwo_name (which contains the name of
1703 // dwo file) and will try to call ModuleList::GetSharedModule
1704 // again. In some cases (i.e. for empty files) Clang 4.0 generates
1705 // a *.dwo file which has DW_AT_GNU_dwo_name, but no
1706 // DW_AT_comp_dir. In this case the method
1707 // ModuleList::GetSharedModule will fail and the warning will be
1708 // printed. However, as one can notice in this case we don't
1709 // actually need to try to load the already loaded module
1710 // (corresponding to .dwo) so we simply skip it.
1711 if (m_obj_file->GetFileSpec()
1712 .GetFileNameExtension()
1713 .GetStringRef() == ".dwo" &&
1714 llvm::StringRef(m_obj_file->GetFileSpec().GetPath())
1715 .endswith(dwo_module_spec.GetFileSpec().GetPath())) {
1719 Status error = ModuleList::GetSharedModule(
1720 dwo_module_spec, module_sp, NULL, NULL, NULL);
1722 GetObjectFile()->GetModule()->ReportWarning(
1723 "0x%8.8x: unable to locate module needed for external types: "
1724 "%s\nerror: %s\nDebugging will be degraded due to missing "
1725 "types. Rebuilding your project will regenerate the needed "
1728 dwo_module_spec.GetFileSpec().GetPath().c_str(),
1729 error.AsCString("unknown error"));
1732 m_external_type_modules[const_name] = module_sp;
1739 SymbolFileDWARF::GlobalVariableMap &SymbolFileDWARF::GetGlobalAranges() {
1740 if (!m_global_aranges_ap) {
1741 m_global_aranges_ap.reset(new GlobalVariableMap());
1743 ModuleSP module_sp = GetObjectFile()->GetModule();
1745 const size_t num_cus = module_sp->GetNumCompileUnits();
1746 for (size_t i = 0; i < num_cus; ++i) {
1747 CompUnitSP cu_sp = module_sp->GetCompileUnitAtIndex(i);
1749 VariableListSP globals_sp = cu_sp->GetVariableList(true);
1751 const size_t num_globals = globals_sp->GetSize();
1752 for (size_t g = 0; g < num_globals; ++g) {
1753 VariableSP var_sp = globals_sp->GetVariableAtIndex(g);
1754 if (var_sp && !var_sp->GetLocationIsConstantValueData()) {
1755 const DWARFExpression &location = var_sp->LocationExpression();
1756 Value location_result;
1758 if (location.Evaluate(nullptr, LLDB_INVALID_ADDRESS, nullptr,
1759 nullptr, location_result, &error)) {
1760 if (location_result.GetValueType() ==
1761 Value::eValueTypeFileAddress) {
1762 lldb::addr_t file_addr =
1763 location_result.GetScalar().ULongLong();
1764 lldb::addr_t byte_size = 1;
1765 if (var_sp->GetType())
1766 byte_size = var_sp->GetType()->GetByteSize();
1767 m_global_aranges_ap->Append(GlobalVariableMap::Entry(
1768 file_addr, byte_size, var_sp.get()));
1777 m_global_aranges_ap->Sort();
1779 return *m_global_aranges_ap;
1782 uint32_t SymbolFileDWARF::ResolveSymbolContext(const Address &so_addr,
1783 SymbolContextItem resolve_scope,
1784 SymbolContext &sc) {
1785 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
1786 Timer scoped_timer(func_cat,
1788 "ResolveSymbolContext (so_addr = { "
1789 "section = %p, offset = 0x%" PRIx64
1790 " }, resolve_scope = 0x%8.8x)",
1791 static_cast<void *>(so_addr.GetSection().get()),
1792 so_addr.GetOffset(), resolve_scope);
1793 uint32_t resolved = 0;
1795 (eSymbolContextCompUnit | eSymbolContextFunction | eSymbolContextBlock |
1796 eSymbolContextLineEntry | eSymbolContextVariable)) {
1797 lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
1799 DWARFDebugInfo *debug_info = DebugInfo();
1801 const dw_offset_t cu_offset =
1802 debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
1803 if (cu_offset == DW_INVALID_OFFSET) {
1804 // Global variables are not in the compile unit address ranges. The
1805 // only way to currently find global variables is to iterate over the
1806 // .debug_pubnames or the __apple_names table and find all items in
1807 // there that point to DW_TAG_variable DIEs and then find the address
1809 if (resolve_scope & eSymbolContextVariable) {
1810 GlobalVariableMap &map = GetGlobalAranges();
1811 const GlobalVariableMap::Entry *entry =
1812 map.FindEntryThatContains(file_vm_addr);
1813 if (entry && entry->data) {
1814 Variable *variable = entry->data;
1815 SymbolContextScope *scc = variable->GetSymbolContextScope();
1817 scc->CalculateSymbolContext(&sc);
1818 sc.variable = variable;
1820 return sc.GetResolvedMask();
1824 uint32_t cu_idx = DW_INVALID_INDEX;
1825 DWARFUnit *dwarf_cu =
1826 debug_info->GetCompileUnit(cu_offset, &cu_idx);
1828 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
1830 resolved |= eSymbolContextCompUnit;
1832 bool force_check_line_table = false;
1834 (eSymbolContextFunction | eSymbolContextBlock)) {
1835 DWARFDIE function_die = dwarf_cu->LookupAddress(file_vm_addr);
1839 sc.comp_unit->FindFunctionByUID(function_die.GetID()).get();
1840 if (sc.function == NULL)
1841 sc.function = ParseFunction(*sc.comp_unit, function_die);
1843 if (sc.function && (resolve_scope & eSymbolContextBlock))
1844 block_die = function_die.LookupDeepestBlock(file_vm_addr);
1846 // We might have had a compile unit that had discontiguous
1847 // address ranges where the gaps are symbols that don't have
1848 // any debug info. Discontiguous compile unit address ranges
1849 // should only happen when there aren't other functions from
1850 // other compile units in these gaps. This helps keep the size
1851 // of the aranges down.
1852 force_check_line_table = true;
1855 if (sc.function != NULL) {
1856 resolved |= eSymbolContextFunction;
1858 if (resolve_scope & eSymbolContextBlock) {
1859 Block &block = sc.function->GetBlock(true);
1862 sc.block = block.FindBlockByID(block_die.GetID());
1864 sc.block = block.FindBlockByID(function_die.GetID());
1866 resolved |= eSymbolContextBlock;
1871 if ((resolve_scope & eSymbolContextLineEntry) ||
1872 force_check_line_table) {
1873 LineTable *line_table = sc.comp_unit->GetLineTable();
1874 if (line_table != NULL) {
1875 // And address that makes it into this function should be in
1876 // terms of this debug file if there is no debug map, or it
1877 // will be an address in the .o file which needs to be fixed up
1878 // to be in terms of the debug map executable. Either way,
1879 // calling FixupAddress() will work for us.
1880 Address exe_so_addr(so_addr);
1881 if (FixupAddress(exe_so_addr)) {
1882 if (line_table->FindLineEntryByAddress(exe_so_addr,
1884 resolved |= eSymbolContextLineEntry;
1890 if (force_check_line_table &&
1891 !(resolved & eSymbolContextLineEntry)) {
1892 // We might have had a compile unit that had discontiguous
1893 // address ranges where the gaps are symbols that don't have any
1894 // debug info. Discontiguous compile unit address ranges should
1895 // only happen when there aren't other functions from other
1896 // compile units in these gaps. This helps keep the size of the
1898 sc.comp_unit = NULL;
1899 resolved &= ~eSymbolContextCompUnit;
1902 GetObjectFile()->GetModule()->ReportWarning(
1903 "0x%8.8x: compile unit %u failed to create a valid "
1904 "lldb_private::CompileUnit class.",
1914 uint32_t SymbolFileDWARF::ResolveSymbolContext(const FileSpec &file_spec,
1917 SymbolContextItem resolve_scope,
1918 SymbolContextList &sc_list) {
1919 const uint32_t prev_size = sc_list.GetSize();
1920 if (resolve_scope & eSymbolContextCompUnit) {
1921 DWARFDebugInfo *debug_info = DebugInfo();
1924 DWARFUnit *dwarf_cu = NULL;
1927 (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL;
1929 CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
1930 const bool full_match = (bool)file_spec.GetDirectory();
1931 bool file_spec_matches_cu_file_spec =
1932 dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
1933 if (check_inlines || file_spec_matches_cu_file_spec) {
1934 SymbolContext sc(m_obj_file->GetModule());
1935 sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
1937 uint32_t file_idx = UINT32_MAX;
1939 // If we are looking for inline functions only and we don't find it
1940 // in the support files, we are done.
1941 if (check_inlines) {
1942 file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex(
1943 1, file_spec, true);
1944 if (file_idx == UINT32_MAX)
1949 LineTable *line_table = sc.comp_unit->GetLineTable();
1951 if (line_table != NULL && line != 0) {
1952 // We will have already looked up the file index if we are
1953 // searching for inline entries.
1955 file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex(
1956 1, file_spec, true);
1958 if (file_idx != UINT32_MAX) {
1959 uint32_t found_line;
1960 uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex(
1961 0, file_idx, line, false, &sc.line_entry);
1962 found_line = sc.line_entry.line;
1964 while (line_idx != UINT32_MAX) {
1968 (eSymbolContextFunction | eSymbolContextBlock)) {
1969 const lldb::addr_t file_vm_addr =
1970 sc.line_entry.range.GetBaseAddress().GetFileAddress();
1971 if (file_vm_addr != LLDB_INVALID_ADDRESS) {
1972 DWARFDIE function_die =
1973 dwarf_cu->LookupAddress(file_vm_addr);
1978 ->FindFunctionByUID(function_die.GetID())
1980 if (sc.function == NULL)
1982 ParseFunction(*sc.comp_unit, function_die);
1985 (resolve_scope & eSymbolContextBlock))
1987 function_die.LookupDeepestBlock(file_vm_addr);
1990 if (sc.function != NULL) {
1991 Block &block = sc.function->GetBlock(true);
1994 sc.block = block.FindBlockByID(block_die.GetID());
1995 else if (function_die)
1997 block.FindBlockByID(function_die.GetID());
2003 line_idx = line_table->FindLineEntryIndexByFileIndex(
2004 line_idx + 1, file_idx, found_line, true,
2008 } else if (file_spec_matches_cu_file_spec && !check_inlines) {
2009 // only append the context if we aren't looking for inline call
2010 // sites by file and line and if the file spec matches that of
2014 } else if (file_spec_matches_cu_file_spec && !check_inlines) {
2015 // only append the context if we aren't looking for inline call
2016 // sites by file and line and if the file spec matches that of
2028 return sc_list.GetSize() - prev_size;
2031 void SymbolFileDWARF::PreloadSymbols() {
2032 std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
2036 std::recursive_mutex &SymbolFileDWARF::GetModuleMutex() const {
2037 lldb::ModuleSP module_sp(m_debug_map_module_wp.lock());
2039 return module_sp->GetMutex();
2040 return GetObjectFile()->GetModule()->GetMutex();
2043 bool SymbolFileDWARF::DeclContextMatchesThisSymbolFile(
2044 const lldb_private::CompilerDeclContext *decl_ctx) {
2045 if (decl_ctx == nullptr || !decl_ctx->IsValid()) {
2046 // Invalid namespace decl which means we aren't matching only things in
2047 // this symbol file, so return true to indicate it matches this symbol
2052 TypeSystem *decl_ctx_type_system = decl_ctx->GetTypeSystem();
2053 TypeSystem *type_system = GetTypeSystemForLanguage(
2054 decl_ctx_type_system->GetMinimumLanguage(nullptr));
2055 if (decl_ctx_type_system == type_system)
2056 return true; // The type systems match, return true
2058 // The namespace AST was valid, and it does not match...
2059 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2062 GetObjectFile()->GetModule()->LogMessage(
2063 log, "Valid namespace does not match symbol file");
2068 uint32_t SymbolFileDWARF::FindGlobalVariables(
2069 const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
2070 uint32_t max_matches, VariableList &variables) {
2071 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2074 GetObjectFile()->GetModule()->LogMessage(
2076 "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", "
2077 "parent_decl_ctx=%p, max_matches=%u, variables)",
2078 name.GetCString(), static_cast<const void *>(parent_decl_ctx),
2081 if (!DeclContextMatchesThisSymbolFile(parent_decl_ctx))
2084 DWARFDebugInfo *info = DebugInfo();
2088 // Remember how many variables are in the list before we search.
2089 const uint32_t original_size = variables.GetSize();
2091 llvm::StringRef basename;
2092 llvm::StringRef context;
2094 if (!CPlusPlusLanguage::ExtractContextAndIdentifier(name.GetCString(),
2096 basename = name.GetStringRef();
2098 DIEArray die_offsets;
2099 m_index->GetGlobalVariables(ConstString(basename), die_offsets);
2100 const size_t num_die_matches = die_offsets.size();
2101 if (num_die_matches) {
2103 sc.module_sp = m_obj_file->GetModule();
2104 assert(sc.module_sp);
2106 // Loop invariant: Variables up to this index have been checked for context
2108 uint32_t pruned_idx = original_size;
2111 for (size_t i = 0; i < num_die_matches && !done; ++i) {
2112 const DIERef &die_ref = die_offsets[i];
2113 DWARFDIE die = GetDIE(die_ref);
2116 switch (die.Tag()) {
2118 case DW_TAG_subprogram:
2119 case DW_TAG_inlined_subroutine:
2120 case DW_TAG_try_block:
2121 case DW_TAG_catch_block:
2124 case DW_TAG_variable: {
2125 sc.comp_unit = GetCompUnitForDWARFCompUnit(die.GetCU(), UINT32_MAX);
2127 if (parent_decl_ctx) {
2128 DWARFASTParser *dwarf_ast = die.GetDWARFParser();
2130 CompilerDeclContext actual_parent_decl_ctx =
2131 dwarf_ast->GetDeclContextContainingUIDFromDWARF(die);
2132 if (!actual_parent_decl_ctx ||
2133 actual_parent_decl_ctx != *parent_decl_ctx)
2138 ParseVariables(sc, die, LLDB_INVALID_ADDRESS, false, false,
2140 while (pruned_idx < variables.GetSize()) {
2141 VariableSP var_sp = variables.GetVariableAtIndex(pruned_idx);
2142 if (var_sp->GetName().GetStringRef().contains(name.GetStringRef()))
2145 variables.RemoveVariableAtIndex(pruned_idx);
2148 if (variables.GetSize() - original_size >= max_matches)
2153 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
2154 name.GetStringRef());
2159 // Return the number of variable that were appended to the list
2160 const uint32_t num_matches = variables.GetSize() - original_size;
2161 if (log && num_matches > 0) {
2162 GetObjectFile()->GetModule()->LogMessage(
2164 "SymbolFileDWARF::FindGlobalVariables (name=\"%s\", "
2165 "parent_decl_ctx=%p, max_matches=%u, variables) => %u",
2166 name.GetCString(), static_cast<const void *>(parent_decl_ctx),
2167 max_matches, num_matches);
2172 uint32_t SymbolFileDWARF::FindGlobalVariables(const RegularExpression ®ex,
2173 uint32_t max_matches,
2174 VariableList &variables) {
2175 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2178 GetObjectFile()->GetModule()->LogMessage(
2180 "SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", "
2181 "max_matches=%u, variables)",
2182 regex.GetText().str().c_str(), max_matches);
2185 DWARFDebugInfo *info = DebugInfo();
2189 // Remember how many variables are in the list before we search.
2190 const uint32_t original_size = variables.GetSize();
2192 DIEArray die_offsets;
2193 m_index->GetGlobalVariables(regex, die_offsets);
2196 sc.module_sp = m_obj_file->GetModule();
2197 assert(sc.module_sp);
2199 const size_t num_matches = die_offsets.size();
2201 for (size_t i = 0; i < num_matches; ++i) {
2202 const DIERef &die_ref = die_offsets[i];
2203 DWARFDIE die = GetDIE(die_ref);
2206 sc.comp_unit = GetCompUnitForDWARFCompUnit(die.GetCU(), UINT32_MAX);
2208 ParseVariables(sc, die, LLDB_INVALID_ADDRESS, false, false, &variables);
2210 if (variables.GetSize() - original_size >= max_matches)
2213 m_index->ReportInvalidDIEOffset(die_ref.die_offset, regex.GetText());
2217 // Return the number of variable that were appended to the list
2218 return variables.GetSize() - original_size;
2221 bool SymbolFileDWARF::ResolveFunction(const DWARFDIE &orig_die,
2222 bool include_inlines,
2223 SymbolContextList &sc_list) {
2229 // If we were passed a die that is not a function, just return false...
2230 if (!(orig_die.Tag() == DW_TAG_subprogram ||
2231 (include_inlines && orig_die.Tag() == DW_TAG_inlined_subroutine)))
2234 DWARFDIE die = orig_die;
2235 DWARFDIE inlined_die;
2236 if (die.Tag() == DW_TAG_inlined_subroutine) {
2240 die = die.GetParent();
2243 if (die.Tag() == DW_TAG_subprogram)
2249 assert(die && die.Tag() == DW_TAG_subprogram);
2250 if (GetFunction(die, sc)) {
2252 // Parse all blocks if needed
2254 Block &function_block = sc.function->GetBlock(true);
2255 sc.block = function_block.FindBlockByID(inlined_die.GetID());
2256 if (sc.block == NULL)
2257 sc.block = function_block.FindBlockByID(inlined_die.GetOffset());
2258 if (sc.block == NULL || !sc.block->GetStartAddress(addr))
2262 addr = sc.function->GetAddressRange().GetBaseAddress();
2265 if (addr.IsValid()) {
2274 bool SymbolFileDWARF::DIEInDeclContext(const CompilerDeclContext *decl_ctx,
2275 const DWARFDIE &die) {
2276 // If we have no parent decl context to match this DIE matches, and if the
2277 // parent decl context isn't valid, we aren't trying to look for any
2278 // particular decl context so any die matches.
2279 if (decl_ctx == nullptr || !decl_ctx->IsValid())
2283 DWARFASTParser *dwarf_ast = die.GetDWARFParser();
2285 CompilerDeclContext actual_decl_ctx =
2286 dwarf_ast->GetDeclContextContainingUIDFromDWARF(die);
2287 if (actual_decl_ctx)
2288 return actual_decl_ctx == *decl_ctx;
2294 uint32_t SymbolFileDWARF::FindFunctions(
2295 const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
2296 FunctionNameType name_type_mask, bool include_inlines, bool append,
2297 SymbolContextList &sc_list) {
2298 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
2299 Timer scoped_timer(func_cat, "SymbolFileDWARF::FindFunctions (name = '%s')",
2302 // eFunctionNameTypeAuto should be pre-resolved by a call to
2303 // Module::LookupInfo::LookupInfo()
2304 assert((name_type_mask & eFunctionNameTypeAuto) == 0);
2306 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2309 GetObjectFile()->GetModule()->LogMessage(
2310 log, "SymbolFileDWARF::FindFunctions (name=\"%s\", "
2311 "name_type_mask=0x%x, append=%u, sc_list)",
2312 name.GetCString(), name_type_mask, append);
2315 // If we aren't appending the results to this list, then clear the list
2319 if (!DeclContextMatchesThisSymbolFile(parent_decl_ctx))
2322 // If name is empty then we won't find anything.
2326 // Remember how many sc_list are in the list before we search in case we are
2327 // appending the results to a variable list.
2329 const uint32_t original_size = sc_list.GetSize();
2331 DWARFDebugInfo *info = DebugInfo();
2335 llvm::DenseSet<const DWARFDebugInfoEntry *> resolved_dies;
2337 CompilerDeclContext empty_decl_ctx;
2338 if (!parent_decl_ctx)
2339 parent_decl_ctx = &empty_decl_ctx;
2341 std::vector<DWARFDIE> dies;
2342 m_index->GetFunctions(name, *info, *parent_decl_ctx, name_type_mask, dies);
2343 for (const DWARFDIE &die: dies) {
2344 if (resolved_dies.insert(die.GetDIE()).second)
2345 ResolveFunction(die, include_inlines, sc_list);
2348 // Return the number of variable that were appended to the list
2349 const uint32_t num_matches = sc_list.GetSize() - original_size;
2351 if (log && num_matches > 0) {
2352 GetObjectFile()->GetModule()->LogMessage(
2353 log, "SymbolFileDWARF::FindFunctions (name=\"%s\", "
2354 "name_type_mask=0x%x, include_inlines=%d, append=%u, sc_list) => "
2356 name.GetCString(), name_type_mask, include_inlines, append,
2362 uint32_t SymbolFileDWARF::FindFunctions(const RegularExpression ®ex,
2363 bool include_inlines, bool append,
2364 SymbolContextList &sc_list) {
2365 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
2366 Timer scoped_timer(func_cat, "SymbolFileDWARF::FindFunctions (regex = '%s')",
2367 regex.GetText().str().c_str());
2369 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2372 GetObjectFile()->GetModule()->LogMessage(
2374 "SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
2375 regex.GetText().str().c_str(), append);
2378 // If we aren't appending the results to this list, then clear the list
2382 DWARFDebugInfo *info = DebugInfo();
2386 // Remember how many sc_list are in the list before we search in case we are
2387 // appending the results to a variable list.
2388 uint32_t original_size = sc_list.GetSize();
2391 m_index->GetFunctions(regex, offsets);
2393 llvm::DenseSet<const DWARFDebugInfoEntry *> resolved_dies;
2394 for (DIERef ref : offsets) {
2395 DWARFDIE die = info->GetDIE(ref);
2397 m_index->ReportInvalidDIEOffset(ref.die_offset, regex.GetText());
2400 if (resolved_dies.insert(die.GetDIE()).second)
2401 ResolveFunction(die, include_inlines, sc_list);
2404 // Return the number of variable that were appended to the list
2405 return sc_list.GetSize() - original_size;
2408 void SymbolFileDWARF::GetMangledNamesForFunction(
2409 const std::string &scope_qualified_name,
2410 std::vector<ConstString> &mangled_names) {
2411 DWARFDebugInfo *info = DebugInfo();
2412 uint32_t num_comp_units = 0;
2414 num_comp_units = info->GetNumCompileUnits();
2416 for (uint32_t i = 0; i < num_comp_units; i++) {
2417 DWARFUnit *cu = info->GetCompileUnitAtIndex(i);
2421 SymbolFileDWARFDwo *dwo = cu->GetDwoSymbolFile();
2423 dwo->GetMangledNamesForFunction(scope_qualified_name, mangled_names);
2426 NameToOffsetMap::iterator iter =
2427 m_function_scope_qualified_name_map.find(scope_qualified_name);
2428 if (iter == m_function_scope_qualified_name_map.end())
2431 DIERefSetSP set_sp = (*iter).second;
2432 std::set<DIERef>::iterator set_iter;
2433 for (set_iter = set_sp->begin(); set_iter != set_sp->end(); set_iter++) {
2434 DWARFDIE die = DebugInfo()->GetDIE(*set_iter);
2435 mangled_names.push_back(ConstString(die.GetMangledName()));
2439 uint32_t SymbolFileDWARF::FindTypes(
2440 const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
2441 bool append, uint32_t max_matches,
2442 llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
2444 // If we aren't appending the results to this list, then clear the list
2448 // Make sure we haven't already searched this SymbolFile before...
2449 if (searched_symbol_files.count(this))
2452 searched_symbol_files.insert(this);
2454 DWARFDebugInfo *info = DebugInfo();
2458 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2461 if (parent_decl_ctx)
2462 GetObjectFile()->GetModule()->LogMessage(
2463 log, "SymbolFileDWARF::FindTypes (sc, name=\"%s\", parent_decl_ctx = "
2464 "%p (\"%s\"), append=%u, max_matches=%u, type_list)",
2465 name.GetCString(), static_cast<const void *>(parent_decl_ctx),
2466 parent_decl_ctx->GetName().AsCString("<NULL>"), append, max_matches);
2468 GetObjectFile()->GetModule()->LogMessage(
2469 log, "SymbolFileDWARF::FindTypes (sc, name=\"%s\", parent_decl_ctx = "
2470 "NULL, append=%u, max_matches=%u, type_list)",
2471 name.GetCString(), append, max_matches);
2474 if (!DeclContextMatchesThisSymbolFile(parent_decl_ctx))
2477 DIEArray die_offsets;
2478 m_index->GetTypes(name, die_offsets);
2479 const size_t num_die_matches = die_offsets.size();
2481 if (num_die_matches) {
2482 const uint32_t initial_types_size = types.GetSize();
2483 for (size_t i = 0; i < num_die_matches; ++i) {
2484 const DIERef &die_ref = die_offsets[i];
2485 DWARFDIE die = GetDIE(die_ref);
2488 if (!DIEInDeclContext(parent_decl_ctx, die))
2489 continue; // The containing decl contexts don't match
2491 Type *matching_type = ResolveType(die, true, true);
2492 if (matching_type) {
2493 // We found a type pointer, now find the shared pointer form our type
2495 types.InsertUnique(matching_type->shared_from_this());
2496 if (types.GetSize() >= max_matches)
2500 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
2501 name.GetStringRef());
2504 const uint32_t num_matches = types.GetSize() - initial_types_size;
2505 if (log && num_matches) {
2506 if (parent_decl_ctx) {
2507 GetObjectFile()->GetModule()->LogMessage(
2508 log, "SymbolFileDWARF::FindTypes (sc, name=\"%s\", parent_decl_ctx "
2509 "= %p (\"%s\"), append=%u, max_matches=%u, type_list) => %u",
2510 name.GetCString(), static_cast<const void *>(parent_decl_ctx),
2511 parent_decl_ctx->GetName().AsCString("<NULL>"), append, max_matches,
2514 GetObjectFile()->GetModule()->LogMessage(
2515 log, "SymbolFileDWARF::FindTypes (sc, name=\"%s\", parent_decl_ctx "
2516 "= NULL, append=%u, max_matches=%u, type_list) => %u",
2517 name.GetCString(), append, max_matches, num_matches);
2522 UpdateExternalModuleListIfNeeded();
2524 for (const auto &pair : m_external_type_modules) {
2525 ModuleSP external_module_sp = pair.second;
2526 if (external_module_sp) {
2527 SymbolVendor *sym_vendor = external_module_sp->GetSymbolVendor();
2529 const uint32_t num_external_matches =
2530 sym_vendor->FindTypes(name, parent_decl_ctx, append, max_matches,
2531 searched_symbol_files, types);
2532 if (num_external_matches)
2533 return num_external_matches;
2542 size_t SymbolFileDWARF::FindTypes(const std::vector<CompilerContext> &context,
2543 bool append, TypeMap &types) {
2547 if (context.empty())
2550 ConstString name = context.back().name;
2555 DIEArray die_offsets;
2556 m_index->GetTypes(name, die_offsets);
2557 const size_t num_die_matches = die_offsets.size();
2559 if (num_die_matches) {
2560 size_t num_matches = 0;
2561 for (size_t i = 0; i < num_die_matches; ++i) {
2562 const DIERef &die_ref = die_offsets[i];
2563 DWARFDIE die = GetDIE(die_ref);
2566 std::vector<CompilerContext> die_context;
2567 die.GetDeclContext(die_context);
2568 if (die_context != context)
2571 Type *matching_type = ResolveType(die, true, true);
2572 if (matching_type) {
2573 // We found a type pointer, now find the shared pointer form our type
2575 types.InsertUnique(matching_type->shared_from_this());
2579 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
2580 name.GetStringRef());
2589 SymbolFileDWARF::FindNamespace(const ConstString &name,
2590 const CompilerDeclContext *parent_decl_ctx) {
2591 Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
2594 GetObjectFile()->GetModule()->LogMessage(
2595 log, "SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
2599 CompilerDeclContext namespace_decl_ctx;
2601 if (!DeclContextMatchesThisSymbolFile(parent_decl_ctx))
2602 return namespace_decl_ctx;
2604 DWARFDebugInfo *info = DebugInfo();
2606 DIEArray die_offsets;
2607 m_index->GetNamespaces(name, die_offsets);
2608 const size_t num_matches = die_offsets.size();
2610 for (size_t i = 0; i < num_matches; ++i) {
2611 const DIERef &die_ref = die_offsets[i];
2612 DWARFDIE die = GetDIE(die_ref);
2615 if (!DIEInDeclContext(parent_decl_ctx, die))
2616 continue; // The containing decl contexts don't match
2618 DWARFASTParser *dwarf_ast = die.GetDWARFParser();
2620 namespace_decl_ctx = dwarf_ast->GetDeclContextForUIDFromDWARF(die);
2621 if (namespace_decl_ctx)
2625 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
2626 name.GetStringRef());
2631 if (log && namespace_decl_ctx) {
2632 GetObjectFile()->GetModule()->LogMessage(
2633 log, "SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => "
2634 "CompilerDeclContext(%p/%p) \"%s\"",
2636 static_cast<const void *>(namespace_decl_ctx.GetTypeSystem()),
2637 static_cast<const void *>(namespace_decl_ctx.GetOpaqueDeclContext()),
2638 namespace_decl_ctx.GetName().AsCString("<NULL>"));
2641 return namespace_decl_ctx;
2644 TypeSP SymbolFileDWARF::GetTypeForDIE(const DWARFDIE &die,
2645 bool resolve_function_context) {
2648 Type *type_ptr = GetDIEToType().lookup(die.GetDIE());
2649 if (type_ptr == NULL) {
2650 CompileUnit *lldb_cu = GetCompUnitForDWARFCompUnit(die.GetCU());
2652 SymbolContext sc(lldb_cu);
2653 const DWARFDebugInfoEntry *parent_die = die.GetParent().GetDIE();
2654 while (parent_die != nullptr) {
2655 if (parent_die->Tag() == DW_TAG_subprogram)
2657 parent_die = parent_die->GetParent();
2659 SymbolContext sc_backup = sc;
2660 if (resolve_function_context && parent_die != nullptr &&
2661 !GetFunction(DWARFDIE(die.GetCU(), parent_die), sc))
2664 type_sp = ParseType(sc, die, NULL);
2665 } else if (type_ptr != DIE_IS_BEING_PARSED) {
2666 // Grab the existing type from the master types lists
2667 type_sp = type_ptr->shared_from_this();
2674 SymbolFileDWARF::GetDeclContextDIEContainingDIE(const DWARFDIE &orig_die) {
2676 DWARFDIE die = orig_die;
2679 // If this is the original DIE that we are searching for a declaration
2680 // for, then don't look in the cache as we don't want our own decl
2681 // context to be our decl context...
2682 if (orig_die != die) {
2683 switch (die.Tag()) {
2684 case DW_TAG_compile_unit:
2685 case DW_TAG_partial_unit:
2686 case DW_TAG_namespace:
2687 case DW_TAG_structure_type:
2688 case DW_TAG_union_type:
2689 case DW_TAG_class_type:
2690 case DW_TAG_lexical_block:
2691 case DW_TAG_subprogram:
2693 case DW_TAG_inlined_subroutine: {
2694 DWARFDIE abs_die = die.GetReferencedDIE(DW_AT_abstract_origin);
2705 DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification);
2707 DWARFDIE decl_ctx_die = GetDeclContextDIEContainingDIE(spec_die);
2709 return decl_ctx_die;
2712 DWARFDIE abs_die = die.GetReferencedDIE(DW_AT_abstract_origin);
2714 DWARFDIE decl_ctx_die = GetDeclContextDIEContainingDIE(abs_die);
2716 return decl_ctx_die;
2719 die = die.GetParent();
2726 SymbolFileDWARF::GetObjCClassSymbol(const ConstString &objc_class_name) {
2727 Symbol *objc_class_symbol = NULL;
2729 Symtab *symtab = m_obj_file->GetSymtab();
2731 objc_class_symbol = symtab->FindFirstSymbolWithNameAndType(
2732 objc_class_name, eSymbolTypeObjCClass, Symtab::eDebugNo,
2733 Symtab::eVisibilityAny);
2736 return objc_class_symbol;
2739 // Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If
2740 // they don't then we can end up looking through all class types for a complete
2741 // type and never find the full definition. We need to know if this attribute
2742 // is supported, so we determine this here and cache th result. We also need to
2743 // worry about the debug map
2745 // if we are doing darwin DWARF in .o file debugging.
2746 bool SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type(
2748 if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate) {
2749 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
2750 if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
2751 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
2753 DWARFDebugInfo *debug_info = DebugInfo();
2754 const uint32_t num_compile_units = GetNumCompileUnits();
2755 for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx) {
2756 DWARFUnit *dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
2757 if (dwarf_cu != cu &&
2758 dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type()) {
2759 m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
2764 if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo &&
2765 GetDebugMapSymfile())
2766 return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type(this);
2768 return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
2771 // This function can be used when a DIE is found that is a forward declaration
2772 // DIE and we want to try and find a type that has the complete definition.
2773 TypeSP SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE(
2774 const DWARFDIE &die, const ConstString &type_name,
2775 bool must_be_implementation) {
2779 if (!type_name || (must_be_implementation && !GetObjCClassSymbol(type_name)))
2782 DIEArray die_offsets;
2783 m_index->GetCompleteObjCClass(type_name, must_be_implementation, die_offsets);
2785 const size_t num_matches = die_offsets.size();
2788 for (size_t i = 0; i < num_matches; ++i) {
2789 const DIERef &die_ref = die_offsets[i];
2790 DWARFDIE type_die = GetDIE(die_ref);
2793 bool try_resolving_type = false;
2795 // Don't try and resolve the DIE we are looking for with the DIE
2797 if (type_die != die) {
2798 switch (type_die.Tag()) {
2799 case DW_TAG_class_type:
2800 case DW_TAG_structure_type:
2801 try_resolving_type = true;
2808 if (try_resolving_type) {
2809 if (must_be_implementation &&
2810 type_die.Supports_DW_AT_APPLE_objc_complete_type())
2811 try_resolving_type = type_die.GetAttributeValueAsUnsigned(
2812 DW_AT_APPLE_objc_complete_type, 0);
2814 if (try_resolving_type) {
2815 Type *resolved_type = ResolveType(type_die, false, true);
2816 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED) {
2817 DEBUG_PRINTF("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64
2818 " (cu 0x%8.8" PRIx64 ")\n",
2820 m_obj_file->GetFileSpec().GetFilename().AsCString(
2822 type_die.GetID(), type_cu->GetID());
2825 GetDIEToType()[die.GetDIE()] = resolved_type;
2826 type_sp = resolved_type->shared_from_this();
2832 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
2833 type_name.GetStringRef());
2840 //----------------------------------------------------------------------
2841 // This function helps to ensure that the declaration contexts match for two
2842 // different DIEs. Often times debug information will refer to a forward
2843 // declaration of a type (the equivalent of "struct my_struct;". There will
2844 // often be a declaration of that type elsewhere that has the full definition.
2845 // When we go looking for the full type "my_struct", we will find one or more
2846 // matches in the accelerator tables and we will then need to make sure the
2847 // type was in the same declaration context as the original DIE. This function
2848 // can efficiently compare two DIEs and will return true when the declaration
2849 // context matches, and false when they don't.
2850 //----------------------------------------------------------------------
2851 bool SymbolFileDWARF::DIEDeclContextsMatch(const DWARFDIE &die1,
2852 const DWARFDIE &die2) {
2856 DWARFDIECollection decl_ctx_1;
2857 DWARFDIECollection decl_ctx_2;
2858 // The declaration DIE stack is a stack of the declaration context DIEs all
2859 // the way back to the compile unit. If a type "T" is declared inside a class
2860 // "B", and class "B" is declared inside a class "A" and class "A" is in a
2861 // namespace "lldb", and the namespace is in a compile unit, there will be a
2864 // [0] DW_TAG_class_type for "B"
2865 // [1] DW_TAG_class_type for "A"
2866 // [2] DW_TAG_namespace for "lldb"
2867 // [3] DW_TAG_compile_unit or DW_TAG_partial_unit for the source file.
2869 // We grab both contexts and make sure that everything matches all the way
2870 // back to the compiler unit.
2872 // First lets grab the decl contexts for both DIEs
2873 die1.GetDeclContextDIEs(decl_ctx_1);
2874 die2.GetDeclContextDIEs(decl_ctx_2);
2875 // Make sure the context arrays have the same size, otherwise we are done
2876 const size_t count1 = decl_ctx_1.Size();
2877 const size_t count2 = decl_ctx_2.Size();
2878 if (count1 != count2)
2881 // Make sure the DW_TAG values match all the way back up the compile unit. If
2882 // they don't, then we are done.
2883 DWARFDIE decl_ctx_die1;
2884 DWARFDIE decl_ctx_die2;
2886 for (i = 0; i < count1; i++) {
2887 decl_ctx_die1 = decl_ctx_1.GetDIEAtIndex(i);
2888 decl_ctx_die2 = decl_ctx_2.GetDIEAtIndex(i);
2889 if (decl_ctx_die1.Tag() != decl_ctx_die2.Tag())
2892 #if defined LLDB_CONFIGURATION_DEBUG
2894 // Make sure the top item in the decl context die array is always
2895 // DW_TAG_compile_unit or DW_TAG_partial_unit. If it isn't then
2896 // something went wrong in the DWARFDIE::GetDeclContextDIEs()
2898 dw_tag_t cu_tag = decl_ctx_1.GetDIEAtIndex(count1 - 1).Tag();
2899 UNUSED_IF_ASSERT_DISABLED(cu_tag);
2900 assert(cu_tag == DW_TAG_compile_unit || cu_tag == DW_TAG_partial_unit);
2903 // Always skip the compile unit when comparing by only iterating up to "count
2904 // - 1". Here we compare the names as we go.
2905 for (i = 0; i < count1 - 1; i++) {
2906 decl_ctx_die1 = decl_ctx_1.GetDIEAtIndex(i);
2907 decl_ctx_die2 = decl_ctx_2.GetDIEAtIndex(i);
2908 const char *name1 = decl_ctx_die1.GetName();
2909 const char *name2 = decl_ctx_die2.GetName();
2910 // If the string was from a DW_FORM_strp, then the pointer will often be
2915 // Name pointers are not equal, so only compare the strings if both are not
2917 if (name1 && name2) {
2918 // If the strings don't compare, we are done...
2919 if (strcmp(name1, name2) != 0)
2922 // One name was NULL while the other wasn't
2926 // We made it through all of the checks and the declaration contexts are
2931 TypeSP SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(
2932 const DWARFDeclContext &dwarf_decl_ctx) {
2935 const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
2936 if (dwarf_decl_ctx_count > 0) {
2937 const ConstString type_name(dwarf_decl_ctx[0].name);
2938 const dw_tag_t tag = dwarf_decl_ctx[0].tag;
2941 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION |
2942 DWARF_LOG_LOOKUPS));
2944 GetObjectFile()->GetModule()->LogMessage(
2945 log, "SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%"
2946 "s, qualified-name='%s')",
2947 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
2948 dwarf_decl_ctx.GetQualifiedName());
2951 DIEArray die_offsets;
2952 m_index->GetTypes(dwarf_decl_ctx, die_offsets);
2953 const size_t num_matches = die_offsets.size();
2955 // Get the type system that we are looking to find a type for. We will
2956 // use this to ensure any matches we find are in a language that this
2957 // type system supports
2958 const LanguageType language = dwarf_decl_ctx.GetLanguage();
2959 TypeSystem *type_system = (language == eLanguageTypeUnknown)
2961 : GetTypeSystemForLanguage(language);
2964 for (size_t i = 0; i < num_matches; ++i) {
2965 const DIERef &die_ref = die_offsets[i];
2966 DWARFDIE type_die = GetDIE(die_ref);
2969 // Make sure type_die's langauge matches the type system we are
2970 // looking for. We don't want to find a "Foo" type from Java if we
2971 // are looking for a "Foo" type for C, C++, ObjC, or ObjC++.
2973 !type_system->SupportsLanguage(type_die.GetLanguage()))
2975 bool try_resolving_type = false;
2977 // Don't try and resolve the DIE we are looking for with the DIE
2979 const dw_tag_t type_tag = type_die.Tag();
2980 // Make sure the tags match
2981 if (type_tag == tag) {
2982 // The tags match, lets try resolving this type
2983 try_resolving_type = true;
2985 // The tags don't match, but we need to watch our for a forward
2986 // declaration for a struct and ("struct foo") ends up being a
2987 // class ("class foo { ... };") or vice versa.
2989 case DW_TAG_class_type:
2990 // We had a "class foo", see if we ended up with a "struct foo
2992 try_resolving_type = (tag == DW_TAG_structure_type);
2994 case DW_TAG_structure_type:
2995 // We had a "struct foo", see if we ended up with a "class foo
2997 try_resolving_type = (tag == DW_TAG_class_type);
3000 // Tags don't match, don't event try to resolve using this type
3001 // whose name matches....
3006 if (try_resolving_type) {
3007 DWARFDeclContext type_dwarf_decl_ctx;
3008 type_die.GetDWARFDeclContext(type_dwarf_decl_ctx);
3011 GetObjectFile()->GetModule()->LogMessage(
3012 log, "SymbolFileDWARF::"
3013 "FindDefinitionTypeForDWARFDeclContext(tag=%s, "
3014 "qualified-name='%s') trying die=0x%8.8x (%s)",
3015 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
3016 dwarf_decl_ctx.GetQualifiedName(), type_die.GetOffset(),
3017 type_dwarf_decl_ctx.GetQualifiedName());
3020 // Make sure the decl contexts match all the way up
3021 if (dwarf_decl_ctx == type_dwarf_decl_ctx) {
3022 Type *resolved_type = ResolveType(type_die, false);
3023 if (resolved_type && resolved_type != DIE_IS_BEING_PARSED) {
3024 type_sp = resolved_type->shared_from_this();
3030 std::string qualified_name;
3031 type_die.GetQualifiedName(qualified_name);
3032 GetObjectFile()->GetModule()->LogMessage(
3033 log, "SymbolFileDWARF::"
3034 "FindDefinitionTypeForDWARFDeclContext(tag=%s, "
3035 "qualified-name='%s') ignoring die=0x%8.8x (%s)",
3036 DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
3037 dwarf_decl_ctx.GetQualifiedName(), type_die.GetOffset(),
3038 qualified_name.c_str());
3042 m_index->ReportInvalidDIEOffset(die_ref.die_offset,
3043 type_name.GetStringRef());
3052 TypeSP SymbolFileDWARF::ParseType(const SymbolContext &sc, const DWARFDIE &die,
3053 bool *type_is_new_ptr) {
3057 TypeSystem *type_system =
3058 GetTypeSystemForLanguage(die.GetCU()->GetLanguageType());
3061 DWARFASTParser *dwarf_ast = type_system->GetDWARFParser();
3063 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO);
3064 type_sp = dwarf_ast->ParseTypeFromDWARF(sc, die, log, type_is_new_ptr);
3066 TypeList *type_list = GetTypeList();
3068 type_list->Insert(type_sp);
3070 if (die.Tag() == DW_TAG_subprogram) {
3071 DIERef die_ref = die.GetDIERef();
3072 std::string scope_qualified_name(GetDeclContextForUID(die.GetID())
3073 .GetScopeQualifiedName()
3075 if (scope_qualified_name.size()) {
3076 NameToOffsetMap::iterator iter =
3077 m_function_scope_qualified_name_map.find(
3078 scope_qualified_name);
3079 if (iter != m_function_scope_qualified_name_map.end())
3080 (*iter).second->insert(die_ref);
3082 DIERefSetSP new_set(new std::set<DIERef>);
3083 new_set->insert(die_ref);
3084 m_function_scope_qualified_name_map.emplace(
3085 std::make_pair(scope_qualified_name, new_set));
3097 size_t SymbolFileDWARF::ParseTypes(const SymbolContext &sc,
3098 const DWARFDIE &orig_die,
3099 bool parse_siblings, bool parse_children) {
3100 size_t types_added = 0;
3101 DWARFDIE die = orig_die;
3103 bool type_is_new = false;
3104 if (ParseType(sc, die, &type_is_new).get()) {
3109 if (parse_children && die.HasChildren()) {
3110 if (die.Tag() == DW_TAG_subprogram) {
3111 SymbolContext child_sc(sc);
3112 child_sc.function = sc.comp_unit->FindFunctionByUID(die.GetID()).get();
3113 types_added += ParseTypes(child_sc, die.GetFirstChild(), true, true);
3115 types_added += ParseTypes(sc, die.GetFirstChild(), true, true);
3119 die = die.GetSibling();
3126 size_t SymbolFileDWARF::ParseBlocksRecursive(Function &func) {
3127 ASSERT_MODULE_LOCK(this);
3128 CompileUnit *comp_unit = func.GetCompileUnit();
3129 lldbassert(comp_unit);
3131 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(comp_unit);
3135 size_t functions_added = 0;
3136 const dw_offset_t function_die_offset = func.GetID();
3137 DWARFDIE function_die = dwarf_cu->GetDIE(function_die_offset);
3139 ParseBlocksRecursive(*comp_unit, &func.GetBlock(false), function_die,
3140 LLDB_INVALID_ADDRESS, 0);
3143 return functions_added;
3146 size_t SymbolFileDWARF::ParseTypes(CompileUnit &comp_unit) {
3147 ASSERT_MODULE_LOCK(this);
3148 size_t types_added = 0;
3149 DWARFUnit *dwarf_cu = GetDWARFCompileUnit(&comp_unit);
3151 DWARFDIE dwarf_cu_die = dwarf_cu->DIE();
3152 if (dwarf_cu_die && dwarf_cu_die.HasChildren()) {
3154 sc.comp_unit = &comp_unit;
3155 types_added = ParseTypes(sc, dwarf_cu_die.GetFirstChild(), true, true);
3162 size_t SymbolFileDWARF::ParseVariablesForContext(const SymbolContext &sc) {
3163 ASSERT_MODULE_LOCK(this);
3164 if (sc.comp_unit != NULL) {
3165 DWARFDebugInfo *info = DebugInfo();
3170 DWARFDIE function_die = info->GetDIE(DIERef(sc.function->GetID(), this));
3172 const dw_addr_t func_lo_pc = function_die.GetAttributeValueAsAddress(
3173 DW_AT_low_pc, LLDB_INVALID_ADDRESS);
3174 if (func_lo_pc != LLDB_INVALID_ADDRESS) {
3175 const size_t num_variables = ParseVariables(
3176 sc, function_die.GetFirstChild(), func_lo_pc, true, true);
3178 // Let all blocks know they have parse all their variables
3179 sc.function->GetBlock(false).SetDidParseVariables(true, true);
3180 return num_variables;
3182 } else if (sc.comp_unit) {
3183 DWARFUnit *dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID());
3185 if (dwarf_cu == NULL)
3188 uint32_t vars_added = 0;
3189 VariableListSP variables(sc.comp_unit->GetVariableList(false));
3191 if (variables.get() == NULL) {
3192 variables.reset(new VariableList());
3193 sc.comp_unit->SetVariableList(variables);
3195 DIEArray die_offsets;
3196 m_index->GetGlobalVariables(*dwarf_cu, die_offsets);
3197 const size_t num_matches = die_offsets.size();
3199 for (size_t i = 0; i < num_matches; ++i) {
3200 const DIERef &die_ref = die_offsets[i];
3201 DWARFDIE die = GetDIE(die_ref);
3204 ParseVariableDIE(sc, die, LLDB_INVALID_ADDRESS));
3206 variables->AddVariableIfUnique(var_sp);
3210 m_index->ReportInvalidDIEOffset(die_ref.die_offset, "");
3220 VariableSP SymbolFileDWARF::ParseVariableDIE(const SymbolContext &sc,
3221 const DWARFDIE &die,
3222 const lldb::addr_t func_low_pc) {
3223 if (die.GetDWARF() != this)
3224 return die.GetDWARF()->ParseVariableDIE(sc, die, func_low_pc);
3230 var_sp = GetDIEToVariable()[die.GetDIE()];
3232 return var_sp; // Already been parsed!
3234 const dw_tag_t tag = die.Tag();
3235 ModuleSP module = GetObjectFile()->GetModule();
3237 if ((tag == DW_TAG_variable) || (tag == DW_TAG_constant) ||
3238 (tag == DW_TAG_formal_parameter && sc.function)) {
3239 DWARFAttributes attributes;
3240 const size_t num_attributes = die.GetAttributes(attributes);
3242 if (num_attributes > 0) {
3243 const char *name = NULL;
3244 const char *mangled = NULL;
3247 DWARFFormValue type_die_form;
3248 DWARFExpression location(die.GetCU());
3249 bool is_external = false;
3250 bool is_artificial = false;
3251 bool location_is_const_value_data = false;
3252 bool has_explicit_location = false;
3253 DWARFFormValue const_value;
3254 Variable::RangeList scope_ranges;
3255 // AccessType accessibility = eAccessNone;
3257 for (i = 0; i < num_attributes; ++i) {
3258 dw_attr_t attr = attributes.AttributeAtIndex(i);
3259 DWARFFormValue form_value;
3261 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3263 case DW_AT_decl_file:
3264 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
3265 form_value.Unsigned()));
3267 case DW_AT_decl_line:
3268 decl.SetLine(form_value.Unsigned());
3270 case DW_AT_decl_column:
3271 decl.SetColumn(form_value.Unsigned());
3274 name = form_value.AsCString();
3276 case DW_AT_linkage_name:
3277 case DW_AT_MIPS_linkage_name:
3278 mangled = form_value.AsCString();
3281 type_die_form = form_value;
3283 case DW_AT_external:
3284 is_external = form_value.Boolean();
3286 case DW_AT_const_value:
3287 // If we have already found a DW_AT_location attribute, ignore this
3289 if (!has_explicit_location) {
3290 location_is_const_value_data = true;
3291 // The constant value will be either a block, a data value or a
3293 auto debug_info_data = die.GetData();
3294 if (DWARFFormValue::IsBlockForm(form_value.Form())) {
3295 // Retrieve the value as a block expression.
3296 uint32_t block_offset =
3297 form_value.BlockData() - debug_info_data.GetDataStart();
3298 uint32_t block_length = form_value.Unsigned();
3299 location.CopyOpcodeData(module, debug_info_data, block_offset,
3301 } else if (DWARFFormValue::IsDataForm(form_value.Form())) {
3302 // Retrieve the value as a data expression.
3303 DWARFFormValue::FixedFormSizes fixed_form_sizes =
3304 DWARFFormValue::GetFixedFormSizesForAddressSize(
3305 attributes.CompileUnitAtIndex(i)->GetAddressByteSize(),
3306 attributes.CompileUnitAtIndex(i)->IsDWARF64());
3307 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
3308 uint32_t data_length =
3309 fixed_form_sizes.GetSize(form_value.Form());
3310 if (data_length == 0) {
3311 const uint8_t *data_pointer = form_value.BlockData();
3313 form_value.Unsigned();
3314 } else if (DWARFFormValue::IsDataForm(form_value.Form())) {
3315 // we need to get the byte size of the type later after we
3316 // create the variable
3317 const_value = form_value;
3320 location.CopyOpcodeData(module, debug_info_data, data_offset,
3323 // Retrieve the value as a string expression.
3324 if (form_value.Form() == DW_FORM_strp) {
3325 DWARFFormValue::FixedFormSizes fixed_form_sizes =
3326 DWARFFormValue::GetFixedFormSizesForAddressSize(
3327 attributes.CompileUnitAtIndex(i)
3328 ->GetAddressByteSize(),
3329 attributes.CompileUnitAtIndex(i)->IsDWARF64());
3330 uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
3331 uint32_t data_length =
3332 fixed_form_sizes.GetSize(form_value.Form());
3333 location.CopyOpcodeData(module, debug_info_data, data_offset,
3336 const char *str = form_value.AsCString();
3337 uint32_t string_offset =
3338 str - (const char *)debug_info_data.GetDataStart();
3339 uint32_t string_length = strlen(str) + 1;
3340 location.CopyOpcodeData(module, debug_info_data,
3341 string_offset, string_length);
3346 case DW_AT_location: {
3347 location_is_const_value_data = false;
3348 has_explicit_location = true;
3349 if (DWARFFormValue::IsBlockForm(form_value.Form())) {
3350 auto data = die.GetData();
3352 uint32_t block_offset =
3353 form_value.BlockData() - data.GetDataStart();
3354 uint32_t block_length = form_value.Unsigned();
3355 location.CopyOpcodeData(module, data, block_offset, block_length);
3357 const DWARFDataExtractor &debug_loc_data = DebugLocData();
3358 const dw_offset_t debug_loc_offset = form_value.Unsigned();
3360 size_t loc_list_length = DWARFExpression::LocationListSize(
3361 die.GetCU(), debug_loc_data, debug_loc_offset);
3362 if (loc_list_length > 0) {
3363 location.CopyOpcodeData(module, debug_loc_data,
3364 debug_loc_offset, loc_list_length);
3365 assert(func_low_pc != LLDB_INVALID_ADDRESS);
3366 location.SetLocationListSlide(
3368 attributes.CompileUnitAtIndex(i)->GetBaseAddress());
3372 case DW_AT_specification:
3373 spec_die = GetDIE(DIERef(form_value));
3375 case DW_AT_start_scope: {
3376 if (form_value.Form() == DW_FORM_sec_offset) {
3377 DWARFRangeList dwarf_scope_ranges;
3378 const DWARFDebugRangesBase *debug_ranges = DebugRanges();
3379 debug_ranges->FindRanges(die.GetCU(),
3380 form_value.Unsigned(),
3381 dwarf_scope_ranges);
3383 // TODO: Handle the case when DW_AT_start_scope have form
3385 // dwarf spec is a bit ambiguous about what is the expected
3386 // behavior in case the enclosing block have a non coninious
3387 // address range and the DW_AT_start_scope entry have a form
3389 GetObjectFile()->GetModule()->ReportWarning(
3391 ": DW_AT_start_scope has unsupported form type (0x%x)\n",
3392 die.GetID(), form_value.Form());
3395 scope_ranges.Sort();
3396 scope_ranges.CombineConsecutiveRanges();
3398 case DW_AT_artificial:
3399 is_artificial = form_value.Boolean();
3401 case DW_AT_accessibility:
3402 break; // accessibility =
3403 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
3404 case DW_AT_declaration:
3405 case DW_AT_description:
3406 case DW_AT_endianity:
3408 case DW_AT_visibility:
3410 case DW_AT_abstract_origin:
3417 const DWARFDIE parent_context_die = GetDeclContextDIEContainingDIE(die);
3418 const dw_tag_t parent_tag = die.GetParent().Tag();
3419 bool is_static_member =
3420 (parent_tag == DW_TAG_compile_unit ||
3421 parent_tag == DW_TAG_partial_unit) &&
3422 (parent_context_die.Tag() == DW_TAG_class_type ||
3423 parent_context_die.Tag() == DW_TAG_structure_type);
3425 ValueType scope = eValueTypeInvalid;
3427 const DWARFDIE sc_parent_die = GetParentSymbolContextDIE(die);
3428 SymbolContextScope *symbol_context_scope = NULL;
3430 bool has_explicit_mangled = mangled != nullptr;
3432 // LLDB relies on the mangled name (DW_TAG_linkage_name or
3433 // DW_AT_MIPS_linkage_name) to generate fully qualified names
3434 // of global variables with commands like "frame var j". For
3435 // example, if j were an int variable holding a value 4 and
3436 // declared in a namespace B which in turn is contained in a
3437 // namespace A, the command "frame var j" returns
3438 // "(int) A::B::j = 4".
3439 // If the compiler does not emit a linkage name, we should be
3440 // able to generate a fully qualified name from the
3441 // declaration context.
3442 if ((parent_tag == DW_TAG_compile_unit ||
3443 parent_tag == DW_TAG_partial_unit) &&
3444 Language::LanguageIsCPlusPlus(die.GetLanguage())) {
3445 DWARFDeclContext decl_ctx;
3447 die.GetDWARFDeclContext(decl_ctx);
3448 mangled = decl_ctx.GetQualifiedNameAsConstString().GetCString();
3452 if (tag == DW_TAG_formal_parameter)
3453 scope = eValueTypeVariableArgument;
3455 // DWARF doesn't specify if a DW_TAG_variable is a local, global
3456 // or static variable, so we have to do a little digging:
3457 // 1) DW_AT_linkage_name implies static lifetime (but may be missing)
3458 // 2) An empty DW_AT_location is an (optimized-out) static lifetime var.
3459 // 3) DW_AT_location containing a DW_OP_addr implies static lifetime.
3460 // Clang likes to combine small global variables into the same symbol
3461 // with locations like: DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
3462 // so we need to look through the whole expression.
3463 bool is_static_lifetime =
3464 has_explicit_mangled ||
3465 (has_explicit_location && !location.IsValid());
3466 // Check if the location has a DW_OP_addr with any address value...
3467 lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
3468 if (!location_is_const_value_data) {
3469 bool op_error = false;
3470 location_DW_OP_addr = location.GetLocation_DW_OP_addr(0, op_error);
3473 location.DumpLocationForAddress(&strm, eDescriptionLevelFull, 0, 0,
3475 GetObjectFile()->GetModule()->ReportError(
3476 "0x%8.8x: %s has an invalid location: %s", die.GetOffset(),
3477 die.GetTagAsCString(), strm.GetData());
3479 if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
3480 is_static_lifetime = true;
3482 SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
3483 if (debug_map_symfile)
3484 // Set the module of the expression to the linked module
3485 // instead of the oject file so the relocated address can be
3487 location.SetModule(debug_map_symfile->GetObjectFile()->GetModule());
3489 if (is_static_lifetime) {
3491 scope = eValueTypeVariableGlobal;
3493 scope = eValueTypeVariableStatic;
3495 if (debug_map_symfile) {
3496 // When leaving the DWARF in the .o files on darwin, when we have a
3497 // global variable that wasn't initialized, the .o file might not
3498 // have allocated a virtual address for the global variable. In
3499 // this case it will have created a symbol for the global variable
3500 // that is undefined/data and external and the value will be the
3501 // byte size of the variable. When we do the address map in
3502 // SymbolFileDWARFDebugMap we rely on having an address, we need to
3503 // do some magic here so we can get the correct address for our
3504 // global variable. The address for all of these entries will be
3505 // zero, and there will be an undefined symbol in this object file,
3506 // and the executable will have a matching symbol with a good
3507 // address. So here we dig up the correct address and replace it in
3508 // the location for the variable, and set the variable's symbol
3509 // context scope to be that of the main executable so the file
3510 // address will resolve correctly.
3511 bool linked_oso_file_addr = false;
3512 if (is_external && location_DW_OP_addr == 0) {
3513 // we have a possible uninitialized extern global
3514 ConstString const_name(mangled ? mangled : name);
3515 ObjectFile *debug_map_objfile =
3516 debug_map_symfile->GetObjectFile();
3517 if (debug_map_objfile) {
3518 Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
3519 if (debug_map_symtab) {
3520 Symbol *exe_symbol =
3521 debug_map_symtab->FindFirstSymbolWithNameAndType(
3522 const_name, eSymbolTypeData, Symtab::eDebugYes,
3523 Symtab::eVisibilityExtern);
3525 if (exe_symbol->ValueIsAddress()) {
3526 const addr_t exe_file_addr =
3527 exe_symbol->GetAddressRef().GetFileAddress();
3528 if (exe_file_addr != LLDB_INVALID_ADDRESS) {
3529 if (location.Update_DW_OP_addr(exe_file_addr)) {
3530 linked_oso_file_addr = true;
3531 symbol_context_scope = exe_symbol;
3540 if (!linked_oso_file_addr) {
3541 // The DW_OP_addr is not zero, but it contains a .o file address
3542 // which needs to be linked up correctly.
3543 const lldb::addr_t exe_file_addr =
3544 debug_map_symfile->LinkOSOFileAddress(this,
3545 location_DW_OP_addr);
3546 if (exe_file_addr != LLDB_INVALID_ADDRESS) {
3547 // Update the file address for this variable
3548 location.Update_DW_OP_addr(exe_file_addr);
3550 // Variable didn't make it into the final executable
3556 if (location_is_const_value_data)
3557 scope = eValueTypeVariableStatic;
3559 scope = eValueTypeVariableLocal;
3560 if (debug_map_symfile) {
3561 // We need to check for TLS addresses that we need to fixup
3562 if (location.ContainsThreadLocalStorage()) {
3563 location.LinkThreadLocalStorage(
3564 debug_map_symfile->GetObjectFile()->GetModule(),
3565 [this, debug_map_symfile](
3566 lldb::addr_t unlinked_file_addr) -> lldb::addr_t {
3567 return debug_map_symfile->LinkOSOFileAddress(
3568 this, unlinked_file_addr);
3570 scope = eValueTypeVariableThreadLocal;
3577 if (symbol_context_scope == NULL) {
3578 switch (parent_tag) {
3579 case DW_TAG_subprogram:
3580 case DW_TAG_inlined_subroutine:
3581 case DW_TAG_lexical_block:
3583 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(
3584 sc_parent_die.GetID());
3585 if (symbol_context_scope == NULL)
3586 symbol_context_scope = sc.function;
3591 symbol_context_scope = sc.comp_unit;
3596 if (symbol_context_scope) {
3597 SymbolFileTypeSP type_sp(
3598 new SymbolFileType(*this, DIERef(type_die_form).GetUID(this)));
3600 if (const_value.Form() && type_sp && type_sp->GetType())
3601 location.CopyOpcodeData(const_value.Unsigned(),
3602 type_sp->GetType()->GetByteSize(),
3603 die.GetCU()->GetAddressByteSize());
3605 var_sp.reset(new Variable(die.GetID(), name, mangled, type_sp, scope,
3606 symbol_context_scope, scope_ranges, &decl,
3607 location, is_external, is_artificial,
3610 var_sp->SetLocationIsConstantValueData(location_is_const_value_data);
3612 // Not ready to parse this variable yet. It might be a global or static
3613 // variable that is in a function scope and the function in the symbol
3614 // context wasn't filled in yet
3618 // Cache var_sp even if NULL (the variable was just a specification or was
3619 // missing vital information to be able to be displayed in the debugger
3620 // (missing location due to optimization, etc)) so we don't re-parse this
3621 // DIE over and over later...
3622 GetDIEToVariable()[die.GetDIE()] = var_sp;
3624 GetDIEToVariable()[spec_die.GetDIE()] = var_sp;
3630 SymbolFileDWARF::FindBlockContainingSpecification(
3631 const DIERef &func_die_ref, dw_offset_t spec_block_die_offset) {
3632 // Give the concrete function die specified by "func_die_offset", find the
3633 // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
3634 // to "spec_block_die_offset"
3635 return FindBlockContainingSpecification(DebugInfo()->GetDIE(func_die_ref),
3636 spec_block_die_offset);
3640 SymbolFileDWARF::FindBlockContainingSpecification(
3641 const DWARFDIE &die, dw_offset_t spec_block_die_offset) {
3643 switch (die.Tag()) {
3644 case DW_TAG_subprogram:
3645 case DW_TAG_inlined_subroutine:
3646 case DW_TAG_lexical_block: {
3647 if (die.GetAttributeValueAsReference(
3648 DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
3651 if (die.GetAttributeValueAsReference(DW_AT_abstract_origin,
3652 DW_INVALID_OFFSET) ==
3653 spec_block_die_offset)
3658 // Give the concrete function die specified by "func_die_offset", find the
3659 // concrete block whose DW_AT_specification or DW_AT_abstract_origin points
3660 // to "spec_block_die_offset"
3661 for (DWARFDIE child_die = die.GetFirstChild(); child_die;
3662 child_die = child_die.GetSibling()) {
3663 DWARFDIE result_die =
3664 FindBlockContainingSpecification(child_die, spec_block_die_offset);
3673 size_t SymbolFileDWARF::ParseVariables(const SymbolContext &sc,
3674 const DWARFDIE &orig_die,
3675 const lldb::addr_t func_low_pc,
3676 bool parse_siblings, bool parse_children,
3677 VariableList *cc_variable_list) {
3681 VariableListSP variable_list_sp;
3683 size_t vars_added = 0;
3684 DWARFDIE die = orig_die;
3686 dw_tag_t tag = die.Tag();
3688 // Check to see if we have already parsed this variable or constant?
3689 VariableSP var_sp = GetDIEToVariable()[die.GetDIE()];
3691 if (cc_variable_list)
3692 cc_variable_list->AddVariableIfUnique(var_sp);
3694 // We haven't already parsed it, lets do that now.
3695 if ((tag == DW_TAG_variable) || (tag == DW_TAG_constant) ||
3696 (tag == DW_TAG_formal_parameter && sc.function)) {
3697 if (variable_list_sp.get() == NULL) {
3698 DWARFDIE sc_parent_die = GetParentSymbolContextDIE(orig_die);
3699 dw_tag_t parent_tag = sc_parent_die.Tag();
3700 switch (parent_tag) {
3701 case DW_TAG_compile_unit:
3702 case DW_TAG_partial_unit:
3703 if (sc.comp_unit != NULL) {
3704 variable_list_sp = sc.comp_unit->GetVariableList(false);
3705 if (variable_list_sp.get() == NULL) {
3706 variable_list_sp.reset(new VariableList());
3709 GetObjectFile()->GetModule()->ReportError(
3710 "parent 0x%8.8" PRIx64 " %s with no valid compile unit in "
3711 "symbol context for 0x%8.8" PRIx64
3713 sc_parent_die.GetID(), sc_parent_die.GetTagAsCString(),
3714 orig_die.GetID(), orig_die.GetTagAsCString());
3718 case DW_TAG_subprogram:
3719 case DW_TAG_inlined_subroutine:
3720 case DW_TAG_lexical_block:
3721 if (sc.function != NULL) {
3722 // Check to see if we already have parsed the variables for the
3725 Block *block = sc.function->GetBlock(true).FindBlockByID(
3726 sc_parent_die.GetID());
3727 if (block == NULL) {
3728 // This must be a specification or abstract origin with a
3729 // concrete block counterpart in the current function. We need
3730 // to find the concrete block so we can correctly add the
3732 const DWARFDIE concrete_block_die =
3733 FindBlockContainingSpecification(
3734 DIERef(sc.function->GetID(), this),
3735 sc_parent_die.GetOffset());
3736 if (concrete_block_die)
3737 block = sc.function->GetBlock(true).FindBlockByID(
3738 concrete_block_die.GetID());
3741 if (block != NULL) {
3742 const bool can_create = false;
3743 variable_list_sp = block->GetBlockVariableList(can_create);
3744 if (variable_list_sp.get() == NULL) {
3745 variable_list_sp.reset(new VariableList());
3746 block->SetVariableList(variable_list_sp);
3753 GetObjectFile()->GetModule()->ReportError(
3754 "didn't find appropriate parent DIE for variable list for "
3755 "0x%8.8" PRIx64 " %s.\n",
3756 orig_die.GetID(), orig_die.GetTagAsCString());
3761 if (variable_list_sp) {
3762 VariableSP var_sp(ParseVariableDIE(sc, die, func_low_pc));
3764 variable_list_sp->AddVariableIfUnique(var_sp);
3765 if (cc_variable_list)
3766 cc_variable_list->AddVariableIfUnique(var_sp);
3773 bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
3775 if (!skip_children && parse_children && die.HasChildren()) {
3776 vars_added += ParseVariables(sc, die.GetFirstChild(), func_low_pc, true,
3777 true, cc_variable_list);
3781 die = die.GetSibling();
3788 /// Collect call graph edges present in a function DIE.
3789 static std::vector<lldb_private::CallEdge>
3790 CollectCallEdges(DWARFDIE function_die) {
3791 // Check if the function has a supported call site-related attribute.
3792 // TODO: In the future it may be worthwhile to support call_all_source_calls.
3793 uint64_t has_call_edges =
3794 function_die.GetAttributeValueAsUnsigned(DW_AT_call_all_calls, 0);
3795 if (!has_call_edges)
3798 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP));
3799 LLDB_LOG(log, "CollectCallEdges: Found call site info in {0}",
3800 function_die.GetPubname());
3802 // Scan the DIE for TAG_call_site entries.
3803 // TODO: A recursive scan of all blocks in the subprogram is needed in order
3804 // to be DWARF5-compliant. This may need to be done lazily to be performant.
3805 // For now, assume that all entries are nested directly under the subprogram
3806 // (this is the kind of DWARF LLVM produces) and parse them eagerly.
3807 std::vector<CallEdge> call_edges;
3808 for (DWARFDIE child = function_die.GetFirstChild(); child.IsValid();
3809 child = child.GetSibling()) {
3810 if (child.Tag() != DW_TAG_call_site)
3813 // Extract DW_AT_call_origin (the call target's DIE).
3814 DWARFDIE call_origin = child.GetReferencedDIE(DW_AT_call_origin);
3815 if (!call_origin.IsValid()) {
3816 LLDB_LOG(log, "CollectCallEdges: Invalid call origin in {0}",
3817 function_die.GetPubname());
3821 // Extract DW_AT_call_return_pc (the PC the call returns to) if it's
3822 // available. It should only ever be unavailable for tail call edges, in
3823 // which case use LLDB_INVALID_ADDRESS.
3824 addr_t return_pc = child.GetAttributeValueAsAddress(DW_AT_call_return_pc,
3825 LLDB_INVALID_ADDRESS);
3827 LLDB_LOG(log, "CollectCallEdges: Found call origin: {0} (retn-PC: {1:x})",
3828 call_origin.GetPubname(), return_pc);
3829 call_edges.emplace_back(call_origin.GetMangledName(), return_pc);
3834 std::vector<lldb_private::CallEdge>
3835 SymbolFileDWARF::ParseCallEdgesInFunction(UserID func_id) {
3836 DWARFDIE func_die = GetDIEFromUID(func_id.GetID());
3837 if (func_die.IsValid())
3838 return CollectCallEdges(func_die);
3842 //------------------------------------------------------------------
3843 // PluginInterface protocol
3844 //------------------------------------------------------------------
3845 ConstString SymbolFileDWARF::GetPluginName() { return GetPluginNameStatic(); }
3847 uint32_t SymbolFileDWARF::GetPluginVersion() { return 1; }
3849 void SymbolFileDWARF::Dump(lldb_private::Stream &s) { m_index->Dump(s); }
3851 void SymbolFileDWARF::DumpClangAST(Stream &s) {
3852 TypeSystem *ts = GetTypeSystemForLanguage(eLanguageTypeC_plus_plus);
3853 ClangASTContext *clang = llvm::dyn_cast_or_null<ClangASTContext>(ts);
3859 SymbolFileDWARFDebugMap *SymbolFileDWARF::GetDebugMapSymfile() {
3860 if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired()) {
3861 lldb::ModuleSP module_sp(m_debug_map_module_wp.lock());
3863 SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
3865 m_debug_map_symfile =
3866 (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
3869 return m_debug_map_symfile;
3872 DWARFExpression::LocationListFormat
3873 SymbolFileDWARF::GetLocationListFormat() const {
3874 if (m_data_debug_loclists.m_data.GetByteSize() > 0)
3875 return DWARFExpression::LocLists;
3876 return DWARFExpression::RegularLocationList;
3879 SymbolFileDWARFDwp *SymbolFileDWARF::GetDwpSymbolFile() {
3880 llvm::call_once(m_dwp_symfile_once_flag, [this]() {
3881 ModuleSpec module_spec;
3882 module_spec.GetFileSpec() = m_obj_file->GetFileSpec();
3883 module_spec.GetSymbolFileSpec() =
3884 FileSpec(m_obj_file->GetFileSpec().GetPath() + ".dwp");
3885 FileSpec dwp_filespec = Symbols::LocateExecutableSymbolFile(module_spec);
3886 if (FileSystem::Instance().Exists(dwp_filespec)) {
3887 m_dwp_symfile = SymbolFileDWARFDwp::Create(GetObjectFile()->GetModule(),
3891 return m_dwp_symfile.get();