//===-- DWARFUnit.cpp -------------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "DWARFUnit.h" #include "Plugins/Language/ObjC/ObjCLanguage.h" #include "lldb/Core/Module.h" #include "lldb/Host/StringConvert.h" #include "lldb/Symbol/CompileUnit.h" #include "lldb/Symbol/LineTable.h" #include "lldb/Symbol/ObjectFile.h" #include "lldb/Utility/Timer.h" #include "DWARFDIECollection.h" #include "DWARFDebugAbbrev.h" #include "DWARFDebugAranges.h" #include "DWARFDebugInfo.h" #include "LogChannelDWARF.h" #include "SymbolFileDWARFDebugMap.h" #include "SymbolFileDWARFDwo.h" using namespace lldb; using namespace lldb_private; using namespace std; extern int g_verbose; DWARFUnit::DWARFUnit(SymbolFileDWARF *dwarf) : m_dwarf(dwarf) {} DWARFUnit::~DWARFUnit() {} //---------------------------------------------------------------------- // ParseCompileUnitDIEsIfNeeded // // Parses a compile unit and indexes its DIEs if it hasn't already been // done. //---------------------------------------------------------------------- size_t DWARFUnit::ExtractDIEsIfNeeded(bool cu_die_only) { const size_t initial_die_array_size = m_die_array.size(); if ((cu_die_only && initial_die_array_size > 0) || initial_die_array_size > 1) return 0; // Already parsed static Timer::Category func_cat(LLVM_PRETTY_FUNCTION); Timer scoped_timer( func_cat, "%8.8x: DWARFUnit::ExtractDIEsIfNeeded( cu_die_only = %i )", m_offset, cu_die_only); // Set the offset to that of the first DIE and calculate the start of the // next compilation unit header. lldb::offset_t offset = GetFirstDIEOffset(); lldb::offset_t next_cu_offset = GetNextCompileUnitOffset(); DWARFDebugInfoEntry die; // Keep a flat array of the DIE for binary lookup by DIE offset if (!cu_die_only) { Log *log( LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_LOOKUPS)); if (log) { m_dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( log, "DWARFUnit::ExtractDIEsIfNeeded () for compile unit at " ".debug_info[0x%8.8x]", GetOffset()); } } uint32_t depth = 0; // We are in our compile unit, parse starting at the offset // we were told to parse const DWARFDataExtractor &debug_info_data = m_dwarf->get_debug_info_data(); std::vector die_index_stack; die_index_stack.reserve(32); die_index_stack.push_back(0); bool prev_die_had_children = false; DWARFFormValue::FixedFormSizes fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(GetAddressByteSize(), m_is_dwarf64); while (offset < next_cu_offset && die.FastExtract(debug_info_data, this, fixed_form_sizes, &offset)) { // if (log) // log->Printf("0x%8.8x: %*.*s%s%s", // die.GetOffset(), // depth * 2, depth * 2, "", // DW_TAG_value_to_name (die.Tag()), // die.HasChildren() ? " *" : ""); const bool null_die = die.IsNULL(); if (depth == 0) { if (initial_die_array_size == 0) AddUnitDIE(die); uint64_t base_addr = die.GetAttributeValueAsAddress( m_dwarf, this, DW_AT_low_pc, LLDB_INVALID_ADDRESS); if (base_addr == LLDB_INVALID_ADDRESS) base_addr = die.GetAttributeValueAsAddress(m_dwarf, this, DW_AT_entry_pc, 0); SetBaseAddress(base_addr); if (cu_die_only) return 1; } else { if (null_die) { if (prev_die_had_children) { // This will only happen if a DIE says is has children // but all it contains is a NULL tag. Since we are removing // the NULL DIEs from the list (saves up to 25% in C++ code), // we need a way to let the DIE know that it actually doesn't // have children. if (!m_die_array.empty()) m_die_array.back().SetEmptyChildren(true); } } else { die.SetParentIndex(m_die_array.size() - die_index_stack[depth - 1]); if (die_index_stack.back()) m_die_array[die_index_stack.back()].SetSiblingIndex( m_die_array.size() - die_index_stack.back()); // Only push the DIE if it isn't a NULL DIE m_die_array.push_back(die); } } if (null_die) { // NULL DIE. if (!die_index_stack.empty()) die_index_stack.pop_back(); if (depth > 0) --depth; if (depth == 0) break; // We are done with this compile unit! prev_die_had_children = false; } else { die_index_stack.back() = m_die_array.size() - 1; // Normal DIE const bool die_has_children = die.HasChildren(); if (die_has_children) { die_index_stack.push_back(0); ++depth; } prev_die_had_children = die_has_children; } } // Give a little bit of info if we encounter corrupt DWARF (our offset // should always terminate at or before the start of the next compilation // unit header). if (offset > next_cu_offset) { m_dwarf->GetObjectFile()->GetModule()->ReportWarning( "DWARF compile unit extends beyond its bounds cu 0x%8.8x at " "0x%8.8" PRIx64 "\n", GetOffset(), offset); } // Since std::vector objects will double their size, we really need to // make a new array with the perfect size so we don't end up wasting // space. So here we copy and swap to make sure we don't have any extra // memory taken up. if (m_die_array.size() < m_die_array.capacity()) { DWARFDebugInfoEntry::collection exact_size_die_array(m_die_array.begin(), m_die_array.end()); exact_size_die_array.swap(m_die_array); } Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); if (log && log->GetVerbose()) { StreamString strm; Dump(&strm); if (m_die_array.empty()) strm.Printf("error: no DIE for compile unit"); else m_die_array[0].Dump(m_dwarf, this, strm, UINT32_MAX); log->PutString(strm.GetString()); } if (!m_dwo_symbol_file) return m_die_array.size(); DWARFUnit *dwo_cu = m_dwo_symbol_file->GetCompileUnit(); size_t dwo_die_count = dwo_cu->ExtractDIEsIfNeeded(cu_die_only); return m_die_array.size() + dwo_die_count - 1; // We have 2 CU die, but we want to count it only as one } void DWARFUnit::AddUnitDIE(DWARFDebugInfoEntry &die) { assert(m_die_array.empty() && "Compile unit DIE already added"); // The average bytes per DIE entry has been seen to be around 14-20 so lets // pre-reserve half of that since we are now stripping the NULL tags. // Only reserve the memory if we are adding children of the main compile unit // DIE. The compile unit DIE is always the first entry, so if our size is 1, // then we are adding the first compile unit child DIE and should reserve // the memory. m_die_array.reserve(GetDebugInfoSize() / 24); m_die_array.push_back(die); const DWARFDebugInfoEntry &cu_die = m_die_array.front(); std::unique_ptr dwo_symbol_file = m_dwarf->GetDwoSymbolFileForCompileUnit(*this, cu_die); if (!dwo_symbol_file) return; DWARFUnit *dwo_cu = dwo_symbol_file->GetCompileUnit(); if (!dwo_cu) return; // Can't fetch the compile unit from the dwo file. DWARFDIE dwo_cu_die = dwo_cu->GetUnitDIEOnly(); if (!dwo_cu_die.IsValid()) return; // Can't fetch the compile unit DIE from the dwo file. uint64_t main_dwo_id = cu_die.GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_GNU_dwo_id, 0); uint64_t sub_dwo_id = dwo_cu_die.GetAttributeValueAsUnsigned(DW_AT_GNU_dwo_id, 0); if (main_dwo_id != sub_dwo_id) return; // The 2 dwo ID isn't match. Don't use the dwo file as it belongs to // a differectn compilation. m_dwo_symbol_file = std::move(dwo_symbol_file); dw_addr_t addr_base = cu_die.GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_GNU_addr_base, 0); dw_addr_t ranges_base = cu_die.GetAttributeValueAsUnsigned( m_dwarf, this, DW_AT_GNU_ranges_base, 0); dwo_cu->SetAddrBase(addr_base, ranges_base, m_offset); } DWARFDIE DWARFUnit::LookupAddress(const dw_addr_t address) { if (DIE()) { const DWARFDebugAranges &func_aranges = GetFunctionAranges(); // Re-check the aranges auto pointer contents in case it was created above if (!func_aranges.IsEmpty()) return GetDIE(func_aranges.FindAddress(address)); } return DWARFDIE(); } size_t DWARFUnit::AppendDIEsWithTag(const dw_tag_t tag, DWARFDIECollection &dies, uint32_t depth) const { size_t old_size = dies.Size(); DWARFDebugInfoEntry::const_iterator pos; DWARFDebugInfoEntry::const_iterator end = m_die_array.end(); for (pos = m_die_array.begin(); pos != end; ++pos) { if (pos->Tag() == tag) dies.Append(DWARFDIE(this, &(*pos))); } // Return the number of DIEs added to the collection return dies.Size() - old_size; } lldb::user_id_t DWARFUnit::GetID() const { dw_offset_t local_id = m_base_obj_offset != DW_INVALID_OFFSET ? m_base_obj_offset : m_offset; if (m_dwarf) return DIERef(local_id, local_id).GetUID(m_dwarf); else return local_id; } uint32_t DWARFUnit::Size() const { return IsDWARF64() ? 23 : 11; } dw_offset_t DWARFUnit::GetNextCompileUnitOffset() const { return m_offset + (IsDWARF64() ? 12 : 4) + GetLength(); } size_t DWARFUnit::GetDebugInfoSize() const { return (IsDWARF64() ? 12 : 4) + GetLength() - Size(); } uint32_t DWARFUnit::GetLength() const { return m_length; } uint16_t DWARFUnit::GetVersion() const { return m_version; } const DWARFAbbreviationDeclarationSet *DWARFUnit::GetAbbreviations() const { return m_abbrevs; } dw_offset_t DWARFUnit::GetAbbrevOffset() const { return m_abbrevs ? m_abbrevs->GetOffset() : DW_INVALID_OFFSET; } uint8_t DWARFUnit::GetAddressByteSize() const { return m_addr_size; } dw_addr_t DWARFUnit::GetBaseAddress() const { return m_base_addr; } dw_addr_t DWARFUnit::GetAddrBase() const { return m_addr_base; } dw_addr_t DWARFUnit::GetRangesBase() const { return m_ranges_base; } void DWARFUnit::SetAddrBase(dw_addr_t addr_base, dw_addr_t ranges_base, dw_offset_t base_obj_offset) { m_addr_base = addr_base; m_ranges_base = ranges_base; m_base_obj_offset = base_obj_offset; } void DWARFUnit::ClearDIEs(bool keep_compile_unit_die) { if (m_die_array.size() > 1) { // std::vectors never get any smaller when resized to a smaller size, // or when clear() or erase() are called, the size will report that it // is smaller, but the memory allocated remains intact (call capacity() // to see this). So we need to create a temporary vector and swap the // contents which will cause just the internal pointers to be swapped // so that when "tmp_array" goes out of scope, it will destroy the // contents. // Save at least the compile unit DIE DWARFDebugInfoEntry::collection tmp_array; m_die_array.swap(tmp_array); if (keep_compile_unit_die) m_die_array.push_back(tmp_array.front()); } if (m_dwo_symbol_file) m_dwo_symbol_file->GetCompileUnit()->ClearDIEs(keep_compile_unit_die); } void DWARFUnit::BuildAddressRangeTable(SymbolFileDWARF *dwarf, DWARFDebugAranges *debug_aranges) { // This function is usually called if there in no .debug_aranges section // in order to produce a compile unit level set of address ranges that // is accurate. size_t num_debug_aranges = debug_aranges->GetNumRanges(); // First get the compile unit DIE only and check if it has a DW_AT_ranges const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly(); const dw_offset_t cu_offset = GetOffset(); if (die) { DWARFRangeList ranges; const size_t num_ranges = die->GetAttributeAddressRanges(dwarf, this, ranges, false); if (num_ranges > 0) { // This compile unit has DW_AT_ranges, assume this is correct if it // is present since clang no longer makes .debug_aranges by default // and it emits DW_AT_ranges for DW_TAG_compile_units. GCC also does // this with recent GCC builds. for (size_t i = 0; i < num_ranges; ++i) { const DWARFRangeList::Entry &range = ranges.GetEntryRef(i); debug_aranges->AppendRange(cu_offset, range.GetRangeBase(), range.GetRangeEnd()); } return; // We got all of our ranges from the DW_AT_ranges attribute } } // We don't have a DW_AT_ranges attribute, so we need to parse the DWARF // If the DIEs weren't parsed, then we don't want all dies for all compile // units // to stay loaded when they weren't needed. So we can end up parsing the DWARF // and then throwing them all away to keep memory usage down. const bool clear_dies = ExtractDIEsIfNeeded(false) > 1; die = DIEPtr(); if (die) die->BuildAddressRangeTable(dwarf, this, debug_aranges); if (debug_aranges->GetNumRanges() == num_debug_aranges) { // We got nothing from the functions, maybe we have a line tables only // situation. Check the line tables and build the arange table from this. SymbolContext sc; sc.comp_unit = dwarf->GetCompUnitForDWARFCompUnit(this); if (sc.comp_unit) { SymbolFileDWARFDebugMap *debug_map_sym_file = m_dwarf->GetDebugMapSymfile(); if (debug_map_sym_file == NULL) { LineTable *line_table = sc.comp_unit->GetLineTable(); if (line_table) { LineTable::FileAddressRanges file_ranges; const bool append = true; const size_t num_ranges = line_table->GetContiguousFileAddressRanges(file_ranges, append); for (uint32_t idx = 0; idx < num_ranges; ++idx) { const LineTable::FileAddressRanges::Entry &range = file_ranges.GetEntryRef(idx); debug_aranges->AppendRange(cu_offset, range.GetRangeBase(), range.GetRangeEnd()); } } } else debug_map_sym_file->AddOSOARanges(dwarf, debug_aranges); } } if (debug_aranges->GetNumRanges() == num_debug_aranges) { // We got nothing from the functions, maybe we have a line tables only // situation. Check the line tables and build the arange table from this. SymbolContext sc; sc.comp_unit = dwarf->GetCompUnitForDWARFCompUnit(this); if (sc.comp_unit) { LineTable *line_table = sc.comp_unit->GetLineTable(); if (line_table) { LineTable::FileAddressRanges file_ranges; const bool append = true; const size_t num_ranges = line_table->GetContiguousFileAddressRanges(file_ranges, append); for (uint32_t idx = 0; idx < num_ranges; ++idx) { const LineTable::FileAddressRanges::Entry &range = file_ranges.GetEntryRef(idx); debug_aranges->AppendRange(GetOffset(), range.GetRangeBase(), range.GetRangeEnd()); } } } } // Keep memory down by clearing DIEs if this generate function // caused them to be parsed if (clear_dies) ClearDIEs(true); } lldb::ByteOrder DWARFUnit::GetByteOrder() const { return m_dwarf->GetObjectFile()->GetByteOrder(); } TypeSystem *DWARFUnit::GetTypeSystem() { if (m_dwarf) return m_dwarf->GetTypeSystemForLanguage(GetLanguageType()); else return nullptr; } DWARFFormValue::FixedFormSizes DWARFUnit::GetFixedFormSizes() { return DWARFFormValue::GetFixedFormSizesForAddressSize(GetAddressByteSize(), IsDWARF64()); } void DWARFUnit::SetBaseAddress(dw_addr_t base_addr) { m_base_addr = base_addr; } bool DWARFUnit::HasDIEsParsed() const { return m_die_array.size() > 1; } //---------------------------------------------------------------------- // Compare function DWARFDebugAranges::Range structures //---------------------------------------------------------------------- static bool CompareDIEOffset(const DWARFDebugInfoEntry &die, const dw_offset_t die_offset) { return die.GetOffset() < die_offset; } //---------------------------------------------------------------------- // GetDIE() // // Get the DIE (Debug Information Entry) with the specified offset by // first checking if the DIE is contained within this compile unit and // grabbing the DIE from this compile unit. Otherwise we grab the DIE // from the DWARF file. //---------------------------------------------------------------------- DWARFDIE DWARFUnit::GetDIE(dw_offset_t die_offset) { if (die_offset != DW_INVALID_OFFSET) { if (GetDwoSymbolFile()) return GetDwoSymbolFile()->GetCompileUnit()->GetDIE(die_offset); if (ContainsDIEOffset(die_offset)) { ExtractDIEsIfNeeded(false); DWARFDebugInfoEntry::iterator end = m_die_array.end(); DWARFDebugInfoEntry::iterator pos = lower_bound(m_die_array.begin(), end, die_offset, CompareDIEOffset); if (pos != end) { if (die_offset == (*pos).GetOffset()) return DWARFDIE(this, &(*pos)); } } else { // Don't specify the compile unit offset as we don't know it because the // DIE belongs to // a different compile unit in the same symbol file. return m_dwarf->DebugInfo()->GetDIEForDIEOffset(die_offset); } } return DWARFDIE(); // Not found } uint8_t DWARFUnit::GetAddressByteSize(const DWARFUnit *cu) { if (cu) return cu->GetAddressByteSize(); return DWARFUnit::GetDefaultAddressSize(); } bool DWARFUnit::IsDWARF64(const DWARFUnit *cu) { if (cu) return cu->IsDWARF64(); return false; } uint8_t DWARFUnit::GetDefaultAddressSize() { return 4; } void *DWARFUnit::GetUserData() const { return m_user_data; } void DWARFUnit::SetUserData(void *d) { m_user_data = d; if (m_dwo_symbol_file) m_dwo_symbol_file->GetCompileUnit()->SetUserData(d); } bool DWARFUnit::Supports_DW_AT_APPLE_objc_complete_type() { if (GetProducer() == eProducerLLVMGCC) return false; return true; } bool DWARFUnit::DW_AT_decl_file_attributes_are_invalid() { // llvm-gcc makes completely invalid decl file attributes and won't ever // be fixed, so we need to know to ignore these. return GetProducer() == eProducerLLVMGCC; } bool DWARFUnit::Supports_unnamed_objc_bitfields() { if (GetProducer() == eProducerClang) { const uint32_t major_version = GetProducerVersionMajor(); if (major_version > 425 || (major_version == 425 && GetProducerVersionUpdate() >= 13)) return true; else return false; } return true; // Assume all other compilers didn't have incorrect ObjC bitfield // info } SymbolFileDWARF *DWARFUnit::GetSymbolFileDWARF() const { return m_dwarf; } void DWARFUnit::ParseProducerInfo() { m_producer_version_major = UINT32_MAX; m_producer_version_minor = UINT32_MAX; m_producer_version_update = UINT32_MAX; const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly(); if (die) { const char *producer_cstr = die->GetAttributeValueAsString(m_dwarf, this, DW_AT_producer, NULL); if (producer_cstr) { RegularExpression llvm_gcc_regex( llvm::StringRef("^4\\.[012]\\.[01] \\(Based on Apple " "Inc\\. build [0-9]+\\) \\(LLVM build " "[\\.0-9]+\\)$")); if (llvm_gcc_regex.Execute(llvm::StringRef(producer_cstr))) { m_producer = eProducerLLVMGCC; } else if (strstr(producer_cstr, "clang")) { static RegularExpression g_clang_version_regex( llvm::StringRef("clang-([0-9]+)\\.([0-9]+)\\.([0-9]+)")); RegularExpression::Match regex_match(3); if (g_clang_version_regex.Execute(llvm::StringRef(producer_cstr), ®ex_match)) { std::string str; if (regex_match.GetMatchAtIndex(producer_cstr, 1, str)) m_producer_version_major = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10); if (regex_match.GetMatchAtIndex(producer_cstr, 2, str)) m_producer_version_minor = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10); if (regex_match.GetMatchAtIndex(producer_cstr, 3, str)) m_producer_version_update = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10); } m_producer = eProducerClang; } else if (strstr(producer_cstr, "GNU")) m_producer = eProducerGCC; } } if (m_producer == eProducerInvalid) m_producer = eProcucerOther; } DWARFProducer DWARFUnit::GetProducer() { if (m_producer == eProducerInvalid) ParseProducerInfo(); return m_producer; } uint32_t DWARFUnit::GetProducerVersionMajor() { if (m_producer_version_major == 0) ParseProducerInfo(); return m_producer_version_major; } uint32_t DWARFUnit::GetProducerVersionMinor() { if (m_producer_version_minor == 0) ParseProducerInfo(); return m_producer_version_minor; } uint32_t DWARFUnit::GetProducerVersionUpdate() { if (m_producer_version_update == 0) ParseProducerInfo(); return m_producer_version_update; } LanguageType DWARFUnit::LanguageTypeFromDWARF(uint64_t val) { // Note: user languages between lo_user and hi_user // must be handled explicitly here. switch (val) { case DW_LANG_Mips_Assembler: return eLanguageTypeMipsAssembler; case DW_LANG_GOOGLE_RenderScript: return eLanguageTypeExtRenderScript; default: return static_cast(val); } } LanguageType DWARFUnit::GetLanguageType() { if (m_language_type != eLanguageTypeUnknown) return m_language_type; const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly(); if (die) m_language_type = LanguageTypeFromDWARF( die->GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_language, 0)); return m_language_type; } bool DWARFUnit::IsDWARF64() const { return m_is_dwarf64; } bool DWARFUnit::GetIsOptimized() { if (m_is_optimized == eLazyBoolCalculate) { const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly(); if (die) { m_is_optimized = eLazyBoolNo; if (die->GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_APPLE_optimized, 0) == 1) { m_is_optimized = eLazyBoolYes; } } } return m_is_optimized == eLazyBoolYes; } SymbolFileDWARFDwo *DWARFUnit::GetDwoSymbolFile() const { return m_dwo_symbol_file.get(); } dw_offset_t DWARFUnit::GetBaseObjOffset() const { return m_base_obj_offset; } void DWARFUnit::Index(NameToDIE &func_basenames, NameToDIE &func_fullnames, NameToDIE &func_methods, NameToDIE &func_selectors, NameToDIE &objc_class_selectors, NameToDIE &globals, NameToDIE &types, NameToDIE &namespaces) { assert(!m_dwarf->GetBaseCompileUnit() && "DWARFUnit associated with .dwo or .dwp " "should not be indexed directly"); Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS)); if (log) { m_dwarf->GetObjectFile()->GetModule()->LogMessage( log, "DWARFUnit::Index() for compile unit at .debug_info[0x%8.8x]", GetOffset()); } const LanguageType cu_language = GetLanguageType(); DWARFFormValue::FixedFormSizes fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(GetAddressByteSize(), IsDWARF64()); IndexPrivate(this, cu_language, fixed_form_sizes, GetOffset(), func_basenames, func_fullnames, func_methods, func_selectors, objc_class_selectors, globals, types, namespaces); SymbolFileDWARFDwo *dwo_symbol_file = GetDwoSymbolFile(); if (dwo_symbol_file) { IndexPrivate( dwo_symbol_file->GetCompileUnit(), cu_language, fixed_form_sizes, GetOffset(), func_basenames, func_fullnames, func_methods, func_selectors, objc_class_selectors, globals, types, namespaces); } } void DWARFUnit::IndexPrivate( DWARFUnit *dwarf_cu, const LanguageType cu_language, const DWARFFormValue::FixedFormSizes &fixed_form_sizes, const dw_offset_t cu_offset, NameToDIE &func_basenames, NameToDIE &func_fullnames, NameToDIE &func_methods, NameToDIE &func_selectors, NameToDIE &objc_class_selectors, NameToDIE &globals, NameToDIE &types, NameToDIE &namespaces) { DWARFDebugInfoEntry::const_iterator pos; DWARFDebugInfoEntry::const_iterator begin = dwarf_cu->m_die_array.begin(); DWARFDebugInfoEntry::const_iterator end = dwarf_cu->m_die_array.end(); for (pos = begin; pos != end; ++pos) { const DWARFDebugInfoEntry &die = *pos; const dw_tag_t tag = die.Tag(); switch (tag) { case DW_TAG_array_type: case DW_TAG_base_type: case DW_TAG_class_type: case DW_TAG_constant: case DW_TAG_enumeration_type: case DW_TAG_inlined_subroutine: case DW_TAG_namespace: case DW_TAG_string_type: case DW_TAG_structure_type: case DW_TAG_subprogram: case DW_TAG_subroutine_type: case DW_TAG_typedef: case DW_TAG_union_type: case DW_TAG_unspecified_type: case DW_TAG_variable: break; default: continue; } DWARFAttributes attributes; const char *name = NULL; const char *mangled_cstr = NULL; bool is_declaration = false; // bool is_artificial = false; bool has_address = false; bool has_location_or_const_value = false; bool is_global_or_static_variable = false; DWARFFormValue specification_die_form; const size_t num_attributes = die.GetAttributes(dwarf_cu, fixed_form_sizes, attributes); if (num_attributes > 0) { for (uint32_t i = 0; i < num_attributes; ++i) { dw_attr_t attr = attributes.AttributeAtIndex(i); DWARFFormValue form_value; switch (attr) { case DW_AT_name: if (attributes.ExtractFormValueAtIndex(i, form_value)) name = form_value.AsCString(); break; case DW_AT_declaration: if (attributes.ExtractFormValueAtIndex(i, form_value)) is_declaration = form_value.Unsigned() != 0; break; // case DW_AT_artificial: // if (attributes.ExtractFormValueAtIndex(i, // form_value)) // is_artificial = form_value.Unsigned() != 0; // break; case DW_AT_MIPS_linkage_name: case DW_AT_linkage_name: if (attributes.ExtractFormValueAtIndex(i, form_value)) mangled_cstr = form_value.AsCString(); break; case DW_AT_low_pc: case DW_AT_high_pc: case DW_AT_ranges: has_address = true; break; case DW_AT_entry_pc: has_address = true; break; case DW_AT_location: case DW_AT_const_value: has_location_or_const_value = true; if (tag == DW_TAG_variable) { const DWARFDebugInfoEntry *parent_die = die.GetParent(); while (parent_die != NULL) { switch (parent_die->Tag()) { case DW_TAG_subprogram: case DW_TAG_lexical_block: case DW_TAG_inlined_subroutine: // Even if this is a function level static, we don't add it. We // could theoretically add these if we wanted to by // introspecting into the DW_AT_location and seeing if the // location describes a hard coded address, but we don't want // the performance penalty of that right now. is_global_or_static_variable = false; // if (attributes.ExtractFormValueAtIndex(dwarf, i, // form_value)) { // // If we have valid block data, then we have location // // expression bytesthat are fixed (not a location list). // const uint8_t *block_data = form_value.BlockData(); // if (block_data) { // uint32_t block_length = form_value.Unsigned(); // if (block_length == 1 + // attributes.CompileUnitAtIndex(i)->GetAddressByteSize()) { // if (block_data[0] == DW_OP_addr) // add_die = true; // } // } // } parent_die = NULL; // Terminate the while loop. break; case DW_TAG_compile_unit: is_global_or_static_variable = true; parent_die = NULL; // Terminate the while loop. break; default: parent_die = parent_die->GetParent(); // Keep going in the while loop. break; } } } break; case DW_AT_specification: if (attributes.ExtractFormValueAtIndex(i, form_value)) specification_die_form = form_value; break; } } } switch (tag) { case DW_TAG_subprogram: if (has_address) { if (name) { ObjCLanguage::MethodName objc_method(name, true); if (objc_method.IsValid(true)) { ConstString objc_class_name_with_category( objc_method.GetClassNameWithCategory()); ConstString objc_selector_name(objc_method.GetSelector()); ConstString objc_fullname_no_category_name( objc_method.GetFullNameWithoutCategory(true)); ConstString objc_class_name_no_category(objc_method.GetClassName()); func_fullnames.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); if (objc_class_name_with_category) objc_class_selectors.Insert(objc_class_name_with_category, DIERef(cu_offset, die.GetOffset())); if (objc_class_name_no_category && objc_class_name_no_category != objc_class_name_with_category) objc_class_selectors.Insert(objc_class_name_no_category, DIERef(cu_offset, die.GetOffset())); if (objc_selector_name) func_selectors.Insert(objc_selector_name, DIERef(cu_offset, die.GetOffset())); if (objc_fullname_no_category_name) func_fullnames.Insert(objc_fullname_no_category_name, DIERef(cu_offset, die.GetOffset())); } // If we have a mangled name, then the DW_AT_name attribute // is usually the method name without the class or any parameters const DWARFDebugInfoEntry *parent = die.GetParent(); bool is_method = false; if (parent) { dw_tag_t parent_tag = parent->Tag(); if (parent_tag == DW_TAG_class_type || parent_tag == DW_TAG_structure_type) { is_method = true; } else { if (specification_die_form.IsValid()) { DWARFDIE specification_die = dwarf_cu->GetSymbolFileDWARF()->DebugInfo()->GetDIE( DIERef(specification_die_form)); if (specification_die.GetParent().IsStructOrClass()) is_method = true; } } } if (is_method) func_methods.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); else func_basenames.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); if (!is_method && !mangled_cstr && !objc_method.IsValid(true)) func_fullnames.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); } if (mangled_cstr) { // Make sure our mangled name isn't the same string table entry // as our name. If it starts with '_', then it is ok, else compare // the string to make sure it isn't the same and we don't end up // with duplicate entries if (name && name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0))) { Mangled mangled(ConstString(mangled_cstr), true); func_fullnames.Insert(mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset())); ConstString demangled = mangled.GetDemangledName(cu_language); if (demangled) func_fullnames.Insert(demangled, DIERef(cu_offset, die.GetOffset())); } } } break; case DW_TAG_inlined_subroutine: if (has_address) { if (name) func_basenames.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); if (mangled_cstr) { // Make sure our mangled name isn't the same string table entry // as our name. If it starts with '_', then it is ok, else compare // the string to make sure it isn't the same and we don't end up // with duplicate entries if (name && name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0))) { Mangled mangled(ConstString(mangled_cstr), true); func_fullnames.Insert(mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset())); ConstString demangled = mangled.GetDemangledName(cu_language); if (demangled) func_fullnames.Insert(demangled, DIERef(cu_offset, die.GetOffset())); } } else func_fullnames.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); } break; case DW_TAG_array_type: case DW_TAG_base_type: case DW_TAG_class_type: case DW_TAG_constant: case DW_TAG_enumeration_type: case DW_TAG_string_type: case DW_TAG_structure_type: case DW_TAG_subroutine_type: case DW_TAG_typedef: case DW_TAG_union_type: case DW_TAG_unspecified_type: if (name && !is_declaration) types.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); if (mangled_cstr && !is_declaration) types.Insert(ConstString(mangled_cstr), DIERef(cu_offset, die.GetOffset())); break; case DW_TAG_namespace: if (name) namespaces.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); break; case DW_TAG_variable: if (name && has_location_or_const_value && is_global_or_static_variable) { globals.Insert(ConstString(name), DIERef(cu_offset, die.GetOffset())); // Be sure to include variables by their mangled and demangled // names if they have any since a variable can have a basename // "i", a mangled named "_ZN12_GLOBAL__N_11iE" and a demangled // mangled name "(anonymous namespace)::i"... // Make sure our mangled name isn't the same string table entry // as our name. If it starts with '_', then it is ok, else compare // the string to make sure it isn't the same and we don't end up // with duplicate entries if (mangled_cstr && name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0))) { Mangled mangled(ConstString(mangled_cstr), true); globals.Insert(mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset())); ConstString demangled = mangled.GetDemangledName(cu_language); if (demangled) globals.Insert(demangled, DIERef(cu_offset, die.GetOffset())); } } break; default: continue; } } } const DWARFDebugAranges &DWARFUnit::GetFunctionAranges() { if (m_func_aranges_ap.get() == NULL) { m_func_aranges_ap.reset(new DWARFDebugAranges()); Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_ARANGES)); if (log) { m_dwarf->GetObjectFile()->GetModule()->LogMessage( log, "DWARFUnit::GetFunctionAranges() for compile unit at " ".debug_info[0x%8.8x]", GetOffset()); } const DWARFDebugInfoEntry *die = DIEPtr(); if (die) die->BuildFunctionAddressRangeTable(m_dwarf, this, m_func_aranges_ap.get()); if (m_dwo_symbol_file) { DWARFUnit *dwo_cu = m_dwo_symbol_file->GetCompileUnit(); const DWARFDebugInfoEntry *dwo_die = dwo_cu->DIEPtr(); if (dwo_die) dwo_die->BuildFunctionAddressRangeTable(m_dwo_symbol_file.get(), dwo_cu, m_func_aranges_ap.get()); } const bool minimize = false; m_func_aranges_ap->Sort(minimize); } return *m_func_aranges_ap.get(); }