| //===-- DWARFCompileUnit.cpp ------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFCompileUnit.h" |
| |
| #include "lldb/Core/Mangled.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/Stream.h" |
| #include "lldb/Core/Timer.h" |
| #include "lldb/Symbol/CompileUnit.h" |
| #include "lldb/Symbol/LineTable.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| |
| #include "DWARFDebugAbbrev.h" |
| #include "DWARFDebugAranges.h" |
| #include "DWARFDebugInfo.h" |
| #include "DWARFDIECollection.h" |
| #include "DWARFFormValue.h" |
| #include "LogChannelDWARF.h" |
| #include "NameToDIE.h" |
| #include "SymbolFileDWARF.h" |
| #include "SymbolFileDWARFDebugMap.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace std; |
| |
| |
| extern int g_verbose; |
| |
| DWARFCompileUnit::DWARFCompileUnit(SymbolFileDWARF* dwarf2Data) : |
| m_dwarf2Data (dwarf2Data), |
| m_abbrevs (NULL), |
| m_user_data (NULL), |
| m_die_array (), |
| m_func_aranges_ap (), |
| m_base_addr (0), |
| m_offset (DW_INVALID_OFFSET), |
| m_length (0), |
| m_version (0), |
| m_addr_size (DWARFCompileUnit::GetDefaultAddressSize()), |
| m_producer (eProducerInvalid), |
| m_producer_version_major (0), |
| m_producer_version_minor (0), |
| m_producer_version_update (0) |
| { |
| } |
| |
| void |
| DWARFCompileUnit::Clear() |
| { |
| m_offset = DW_INVALID_OFFSET; |
| m_length = 0; |
| m_version = 0; |
| m_abbrevs = NULL; |
| m_addr_size = DWARFCompileUnit::GetDefaultAddressSize(); |
| m_base_addr = 0; |
| m_die_array.clear(); |
| m_func_aranges_ap.reset(); |
| m_user_data = NULL; |
| m_producer = eProducerInvalid; |
| } |
| |
| bool |
| DWARFCompileUnit::Extract(const DWARFDataExtractor &debug_info, lldb::offset_t *offset_ptr) |
| { |
| Clear(); |
| |
| m_offset = *offset_ptr; |
| |
| if (debug_info.ValidOffset(*offset_ptr)) |
| { |
| dw_offset_t abbr_offset; |
| const DWARFDebugAbbrev *abbr = m_dwarf2Data->DebugAbbrev(); |
| m_length = debug_info.GetU32(offset_ptr); |
| m_version = debug_info.GetU16(offset_ptr); |
| abbr_offset = debug_info.GetU32(offset_ptr); |
| m_addr_size = debug_info.GetU8 (offset_ptr); |
| |
| bool length_OK = debug_info.ValidOffset(GetNextCompileUnitOffset()-1); |
| bool version_OK = SymbolFileDWARF::SupportedVersion(m_version); |
| bool abbr_offset_OK = m_dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset); |
| bool addr_size_OK = ((m_addr_size == 4) || (m_addr_size == 8)); |
| |
| if (length_OK && version_OK && addr_size_OK && abbr_offset_OK && abbr != NULL) |
| { |
| m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset); |
| return true; |
| } |
| |
| // reset the offset to where we tried to parse from if anything went wrong |
| *offset_ptr = m_offset; |
| } |
| |
| return false; |
| } |
| |
| |
| void |
| DWARFCompileUnit::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()); |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // ParseCompileUnitDIEsIfNeeded |
| // |
| // Parses a compile unit and indexes its DIEs if it hasn't already been |
| // done. |
| //---------------------------------------------------------------------- |
| size_t |
| DWARFCompileUnit::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 |
| |
| Timer scoped_timer (__PRETTY_FUNCTION__, |
| "%8.8x: DWARFCompileUnit::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_dwarf2Data->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, |
| "DWARFCompileUnit::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_dwarf2Data->get_debug_info_data(); |
| std::vector<uint32_t> die_index_stack; |
| die_index_stack.reserve(32); |
| die_index_stack.push_back(0); |
| bool prev_die_had_children = false; |
| const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize()); |
| 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) |
| { |
| uint64_t base_addr = die.GetAttributeValueAsUnsigned(m_dwarf2Data, this, DW_AT_low_pc, LLDB_INVALID_ADDRESS); |
| if (base_addr == LLDB_INVALID_ADDRESS) |
| base_addr = die.GetAttributeValueAsUnsigned(m_dwarf2Data, this, DW_AT_entry_pc, 0); |
| SetBaseAddress (base_addr); |
| if (initial_die_array_size == 0) |
| AddDIE (die); |
| 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_dwarf2Data->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 *verbose_log (LogChannelDWARF::GetLogIfAll (DWARF_LOG_DEBUG_INFO | DWARF_LOG_VERBOSE)); |
| if (verbose_log) |
| { |
| StreamString strm; |
| Dump(&strm); |
| if (m_die_array.empty()) |
| strm.Printf("error: no DIE for compile unit"); |
| else |
| m_die_array[0].Dump(m_dwarf2Data, this, strm, UINT32_MAX); |
| verbose_log->PutCString (strm.GetString().c_str()); |
| } |
| |
| return m_die_array.size(); |
| } |
| |
| |
| dw_offset_t |
| DWARFCompileUnit::GetAbbrevOffset() const |
| { |
| return m_abbrevs ? m_abbrevs->GetOffset() : DW_INVALID_OFFSET; |
| } |
| |
| |
| |
| bool |
| DWARFCompileUnit::Verify(Stream *s) const |
| { |
| const DWARFDataExtractor& debug_info = m_dwarf2Data->get_debug_info_data(); |
| bool valid_offset = debug_info.ValidOffset(m_offset); |
| bool length_OK = debug_info.ValidOffset(GetNextCompileUnitOffset()-1); |
| bool version_OK = SymbolFileDWARF::SupportedVersion(m_version); |
| bool abbr_offset_OK = m_dwarf2Data->get_debug_abbrev_data().ValidOffset(GetAbbrevOffset()); |
| bool addr_size_OK = ((m_addr_size == 4) || (m_addr_size == 8)); |
| bool verbose = s->GetVerbose(); |
| if (valid_offset && length_OK && version_OK && addr_size_OK && abbr_offset_OK) |
| { |
| if (verbose) |
| s->Printf(" 0x%8.8x: OK\n", m_offset); |
| return true; |
| } |
| else |
| { |
| s->Printf(" 0x%8.8x: ", m_offset); |
| |
| m_dwarf2Data->get_debug_info_data().Dump (s, m_offset, lldb::eFormatHex, 1, Size(), 32, LLDB_INVALID_ADDRESS, 0, 0); |
| s->EOL(); |
| if (valid_offset) |
| { |
| if (!length_OK) |
| s->Printf(" The length (0x%8.8x) for this compile unit is too large for the .debug_info provided.\n", m_length); |
| if (!version_OK) |
| s->Printf(" The 16 bit compile unit header version is not supported.\n"); |
| if (!abbr_offset_OK) |
| s->Printf(" The offset into the .debug_abbrev section (0x%8.8x) is not valid.\n", GetAbbrevOffset()); |
| if (!addr_size_OK) |
| s->Printf(" The address size is unsupported: 0x%2.2x\n", m_addr_size); |
| } |
| else |
| s->Printf(" The start offset of the compile unit header in the .debug_info is invalid.\n"); |
| } |
| return false; |
| } |
| |
| |
| void |
| DWARFCompileUnit::Dump(Stream *s) const |
| { |
| s->Printf("0x%8.8x: Compile Unit: length = 0x%8.8x, version = 0x%4.4x, abbr_offset = 0x%8.8x, addr_size = 0x%2.2x (next CU at {0x%8.8x})\n", |
| m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size, GetNextCompileUnitOffset()); |
| } |
| |
| |
| static uint8_t g_default_addr_size = 4; |
| |
| uint8_t |
| DWARFCompileUnit::GetAddressByteSize(const DWARFCompileUnit* cu) |
| { |
| if (cu) |
| return cu->GetAddressByteSize(); |
| return DWARFCompileUnit::GetDefaultAddressSize(); |
| } |
| |
| uint8_t |
| DWARFCompileUnit::GetDefaultAddressSize() |
| { |
| return g_default_addr_size; |
| } |
| |
| void |
| DWARFCompileUnit::SetDefaultAddressSize(uint8_t addr_size) |
| { |
| g_default_addr_size = addr_size; |
| } |
| |
| void |
| DWARFCompileUnit::BuildAddressRangeTable (SymbolFileDWARF* dwarf2Data, |
| 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. |
| |
| // First get the compile unit DIE only and check if it has a DW_AT_ranges |
| const DWARFDebugInfoEntry* die = GetCompileUnitDIEOnly(); |
| |
| const dw_offset_t cu_offset = GetOffset(); |
| if (die) |
| { |
| DWARFDebugRanges::RangeList ranges; |
| const size_t num_ranges = die->GetAttributeAddressRanges(dwarf2Data, 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 DWARFDebugRanges::RangeList::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 = DIE(); |
| if (die) |
| die->BuildAddressRangeTable(dwarf2Data, this, debug_aranges); |
| |
| if (debug_aranges->IsEmpty()) |
| { |
| // 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 = dwarf2Data->GetCompUnitForDWARFCompUnit(this); |
| if (sc.comp_unit) |
| { |
| SymbolFileDWARFDebugMap *debug_map_sym_file = m_dwarf2Data->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()); |
| printf ("0x%8.8x: [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")\n", GetOffset(), range.GetRangeBase(), range.GetRangeEnd()); |
| } |
| } |
| } |
| else |
| debug_map_sym_file->AddOSOARanges(dwarf2Data,debug_aranges); |
| } |
| } |
| |
| // Keep memory down by clearing DIEs if this generate function |
| // caused them to be parsed |
| if (clear_dies) |
| ClearDIEs (true); |
| |
| } |
| |
| |
| const DWARFDebugAranges & |
| DWARFCompileUnit::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_dwarf2Data->GetObjectFile()->GetModule()->LogMessage (log, |
| "DWARFCompileUnit::GetFunctionAranges() for compile unit at .debug_info[0x%8.8x]", |
| GetOffset()); |
| } |
| const DWARFDebugInfoEntry* die = DIE(); |
| if (die) |
| die->BuildFunctionAddressRangeTable (m_dwarf2Data, this, m_func_aranges_ap.get()); |
| const bool minimize = false; |
| m_func_aranges_ap->Sort(minimize); |
| } |
| return *m_func_aranges_ap.get(); |
| } |
| |
| bool |
| DWARFCompileUnit::LookupAddress |
| ( |
| const dw_addr_t address, |
| DWARFDebugInfoEntry** function_die_handle, |
| DWARFDebugInfoEntry** block_die_handle |
| ) |
| { |
| bool success = false; |
| |
| if (function_die_handle != NULL && DIE()) |
| { |
| |
| const DWARFDebugAranges &func_aranges = GetFunctionAranges (); |
| |
| // Re-check the aranges auto pointer contents in case it was created above |
| if (!func_aranges.IsEmpty()) |
| { |
| *function_die_handle = GetDIEPtr(func_aranges.FindAddress(address)); |
| if (*function_die_handle != NULL) |
| { |
| success = true; |
| if (block_die_handle != NULL) |
| { |
| DWARFDebugInfoEntry* child = (*function_die_handle)->GetFirstChild(); |
| while (child) |
| { |
| if (child->LookupAddress(address, m_dwarf2Data, this, NULL, block_die_handle)) |
| break; |
| child = child->GetSibling(); |
| } |
| } |
| } |
| } |
| } |
| return success; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Compare function DWARFDebugAranges::Range structures |
| //---------------------------------------------------------------------- |
| static bool CompareDIEOffset (const DWARFDebugInfoEntry& die1, const DWARFDebugInfoEntry& die2) |
| { |
| return die1.GetOffset() < die2.GetOffset(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetDIEPtr() |
| // |
| // Get the DIE (Debug Information Entry) with the specified offset. |
| //---------------------------------------------------------------------- |
| DWARFDebugInfoEntry* |
| DWARFCompileUnit::GetDIEPtr(dw_offset_t die_offset) |
| { |
| if (die_offset != DW_INVALID_OFFSET) |
| { |
| ExtractDIEsIfNeeded (false); |
| DWARFDebugInfoEntry compare_die; |
| compare_die.SetOffset(die_offset); |
| DWARFDebugInfoEntry::iterator end = m_die_array.end(); |
| DWARFDebugInfoEntry::iterator pos = lower_bound(m_die_array.begin(), end, compare_die, CompareDIEOffset); |
| if (pos != end) |
| { |
| if (die_offset == (*pos).GetOffset()) |
| return &(*pos); |
| } |
| } |
| return NULL; // Not found in any compile units |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetDIEPtrContainingOffset() |
| // |
| // Get the DIE (Debug Information Entry) that contains the specified |
| // .debug_info offset. |
| //---------------------------------------------------------------------- |
| const DWARFDebugInfoEntry* |
| DWARFCompileUnit::GetDIEPtrContainingOffset(dw_offset_t die_offset) |
| { |
| if (die_offset != DW_INVALID_OFFSET) |
| { |
| ExtractDIEsIfNeeded (false); |
| DWARFDebugInfoEntry compare_die; |
| compare_die.SetOffset(die_offset); |
| DWARFDebugInfoEntry::iterator end = m_die_array.end(); |
| DWARFDebugInfoEntry::iterator pos = lower_bound(m_die_array.begin(), end, compare_die, CompareDIEOffset); |
| if (pos != end) |
| { |
| if (die_offset >= (*pos).GetOffset()) |
| { |
| DWARFDebugInfoEntry::iterator next = pos + 1; |
| if (next != end) |
| { |
| if (die_offset < (*next).GetOffset()) |
| return &(*pos); |
| } |
| } |
| } |
| } |
| return NULL; // Not found in any compile units |
| } |
| |
| |
| |
| size_t |
| DWARFCompileUnit::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 (&(*pos)); |
| } |
| |
| // Return the number of DIEs added to the collection |
| return dies.Size() - old_size; |
| } |
| |
| //void |
| //DWARFCompileUnit::AddGlobalDIEByIndex (uint32_t die_idx) |
| //{ |
| // m_global_die_indexes.push_back (die_idx); |
| //} |
| // |
| // |
| //void |
| //DWARFCompileUnit::AddGlobal (const DWARFDebugInfoEntry* die) |
| //{ |
| // // Indexes to all file level global and static variables |
| // m_global_die_indexes; |
| // |
| // if (m_die_array.empty()) |
| // return; |
| // |
| // const DWARFDebugInfoEntry* first_die = &m_die_array[0]; |
| // const DWARFDebugInfoEntry* end = first_die + m_die_array.size(); |
| // if (first_die <= die && die < end) |
| // m_global_die_indexes.push_back (die - first_die); |
| //} |
| |
| |
| void |
| DWARFCompileUnit::Index (const uint32_t cu_idx, |
| NameToDIE& func_basenames, |
| NameToDIE& func_fullnames, |
| NameToDIE& func_methods, |
| NameToDIE& func_selectors, |
| NameToDIE& objc_class_selectors, |
| NameToDIE& globals, |
| NameToDIE& types, |
| NameToDIE& namespaces) |
| { |
| const DWARFDataExtractor* debug_str = &m_dwarf2Data->get_debug_str_data(); |
| |
| const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize()); |
| |
| Log *log (LogChannelDWARF::GetLogIfAll (DWARF_LOG_LOOKUPS)); |
| |
| if (log) |
| { |
| m_dwarf2Data->GetObjectFile()->GetModule()->LogMessage (log, |
| "DWARFCompileUnit::Index() for compile unit at .debug_info[0x%8.8x]", |
| GetOffset()); |
| } |
| |
| DWARFDebugInfoEntry::const_iterator pos; |
| DWARFDebugInfoEntry::const_iterator begin = m_die_array.begin(); |
| DWARFDebugInfoEntry::const_iterator end = 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_subprogram: |
| case DW_TAG_inlined_subroutine: |
| 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_subroutine_type: |
| case DW_TAG_structure_type: |
| case DW_TAG_union_type: |
| case DW_TAG_typedef: |
| case DW_TAG_namespace: |
| case DW_TAG_variable: |
| case DW_TAG_unspecified_type: |
| break; |
| |
| default: |
| continue; |
| } |
| |
| DWARFDebugInfoEntry::Attributes 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 = false; |
| bool is_global_or_static_variable = false; |
| |
| dw_offset_t specification_die_offset = DW_INVALID_OFFSET; |
| const size_t num_attributes = die.GetAttributes(m_dwarf2Data, this, 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(m_dwarf2Data, i, form_value)) |
| name = form_value.AsCString(debug_str); |
| break; |
| |
| case DW_AT_declaration: |
| if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value)) |
| is_declaration = form_value.Unsigned() != 0; |
| break; |
| |
| // case DW_AT_artificial: |
| // if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value)) |
| // is_artificial = form_value.Unsigned() != 0; |
| // break; |
| |
| case DW_AT_MIPS_linkage_name: |
| case DW_AT_linkage_name: |
| if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value)) |
| mangled_cstr = form_value.AsCString(debug_str); |
| 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: |
| has_location = 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 dont want the performance |
| // penalty of that right now. |
| is_global_or_static_variable = false; |
| // if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value)) |
| // { |
| // // If we have valid block data, then we have location expression bytes |
| // // that 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(m_dwarf2Data, i, form_value)) |
| specification_die_offset = form_value.Reference(this); |
| break; |
| } |
| } |
| } |
| |
| switch (tag) |
| { |
| case DW_TAG_subprogram: |
| if (has_address) |
| { |
| if (name) |
| { |
| // Note, this check is also done in ParseMethodName, but since this is a hot loop, we do the |
| // simple inlined check outside the call. |
| ObjCLanguageRuntime::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), die.GetOffset()); |
| if (objc_class_name_with_category) |
| objc_class_selectors.Insert(objc_class_name_with_category, 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, die.GetOffset()); |
| if (objc_selector_name) |
| func_selectors.Insert (objc_selector_name, die.GetOffset()); |
| if (objc_fullname_no_category_name) |
| func_fullnames.Insert (objc_fullname_no_category_name, 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_offset != DW_INVALID_OFFSET) |
| { |
| const DWARFDebugInfoEntry *specification_die = m_dwarf2Data->DebugInfo()->GetDIEPtr (specification_die_offset, NULL); |
| if (specification_die) |
| { |
| parent = specification_die->GetParent(); |
| if (parent) |
| { |
| parent_tag = parent->Tag(); |
| |
| if (parent_tag == DW_TAG_class_type || parent_tag == DW_TAG_structure_type) |
| is_method = true; |
| } |
| } |
| } |
| } |
| } |
| |
| |
| if (is_method) |
| func_methods.Insert (ConstString(name), die.GetOffset()); |
| else |
| func_basenames.Insert (ConstString(name), die.GetOffset()); |
| |
| if (!is_method && !mangled_cstr && !objc_method.IsValid(true)) |
| func_fullnames.Insert (ConstString(name), 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 != mangled_cstr && ((mangled_cstr[0] == '_') || (name && ::strcmp(name, mangled_cstr) != 0))) |
| { |
| Mangled mangled (ConstString(mangled_cstr), true); |
| func_fullnames.Insert (mangled.GetMangledName(), die.GetOffset()); |
| if (mangled.GetDemangledName()) |
| func_fullnames.Insert (mangled.GetDemangledName(), die.GetOffset()); |
| } |
| } |
| } |
| break; |
| |
| case DW_TAG_inlined_subroutine: |
| if (has_address) |
| { |
| if (name) |
| func_basenames.Insert (ConstString(name), 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 != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0))) |
| { |
| Mangled mangled (ConstString(mangled_cstr), true); |
| func_fullnames.Insert (mangled.GetMangledName(), die.GetOffset()); |
| if (mangled.GetDemangledName()) |
| func_fullnames.Insert (mangled.GetDemangledName(), die.GetOffset()); |
| } |
| } |
| else |
| func_fullnames.Insert (ConstString(name), die.GetOffset()); |
| } |
| break; |
| |
| 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_subroutine_type: |
| case DW_TAG_structure_type: |
| case DW_TAG_union_type: |
| case DW_TAG_typedef: |
| case DW_TAG_unspecified_type: |
| if (name && is_declaration == false) |
| { |
| types.Insert (ConstString(name), die.GetOffset()); |
| } |
| break; |
| |
| case DW_TAG_namespace: |
| if (name) |
| namespaces.Insert (ConstString(name), die.GetOffset()); |
| break; |
| |
| case DW_TAG_variable: |
| if (name && has_location && is_global_or_static_variable) |
| { |
| globals.Insert (ConstString(name), 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(), die.GetOffset()); |
| if (mangled.GetDemangledName()) |
| globals.Insert (mangled.GetDemangledName(), die.GetOffset()); |
| } |
| } |
| break; |
| |
| default: |
| continue; |
| } |
| } |
| } |
| |
| bool |
| DWARFCompileUnit::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 |
| } |
| |
| bool |
| DWARFCompileUnit::Supports_DW_AT_APPLE_objc_complete_type () |
| { |
| if (GetProducer() == eProducerLLVMGCC) |
| return false; |
| return true; |
| } |
| |
| bool |
| DWARFCompileUnit::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; |
| } |
| |
| void |
| DWARFCompileUnit::ParseProducerInfo () |
| { |
| m_producer_version_major = UINT32_MAX; |
| m_producer_version_minor = UINT32_MAX; |
| m_producer_version_update = UINT32_MAX; |
| |
| const DWARFDebugInfoEntry *die = GetCompileUnitDIEOnly(); |
| if (die) |
| { |
| |
| const char *producer_cstr = die->GetAttributeValueAsString(m_dwarf2Data, this, DW_AT_producer, NULL); |
| if (producer_cstr) |
| { |
| RegularExpression llvm_gcc_regex("^4\\.[012]\\.[01] \\(Based on Apple Inc\\. build [0-9]+\\) \\(LLVM build [\\.0-9]+\\)$"); |
| if (llvm_gcc_regex.Execute (producer_cstr)) |
| { |
| m_producer = eProducerLLVMGCC; |
| } |
| else if (strstr(producer_cstr, "clang")) |
| { |
| static RegularExpression g_clang_version_regex("clang-([0-9]+)\\.([0-9]+)\\.([0-9]+)"); |
| RegularExpression::Match regex_match(3); |
| if (g_clang_version_regex.Execute (producer_cstr, ®ex_match)) |
| { |
| std::string str; |
| if (regex_match.GetMatchAtIndex (producer_cstr, 1, str)) |
| m_producer_version_major = Args::StringToUInt32(str.c_str(), UINT32_MAX, 10); |
| if (regex_match.GetMatchAtIndex (producer_cstr, 2, str)) |
| m_producer_version_minor = Args::StringToUInt32(str.c_str(), UINT32_MAX, 10); |
| if (regex_match.GetMatchAtIndex (producer_cstr, 3, str)) |
| m_producer_version_update = Args::StringToUInt32(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; |
| } |
| |
| DWARFCompileUnit::Producer |
| DWARFCompileUnit::GetProducer () |
| { |
| if (m_producer == eProducerInvalid) |
| ParseProducerInfo (); |
| return m_producer; |
| } |
| |
| |
| uint32_t |
| DWARFCompileUnit::GetProducerVersionMajor() |
| { |
| if (m_producer_version_major == 0) |
| ParseProducerInfo (); |
| return m_producer_version_major; |
| } |
| |
| uint32_t |
| DWARFCompileUnit::GetProducerVersionMinor() |
| { |
| if (m_producer_version_minor == 0) |
| ParseProducerInfo (); |
| return m_producer_version_minor; |
| } |
| |
| uint32_t |
| DWARFCompileUnit::GetProducerVersionUpdate() |
| { |
| if (m_producer_version_update == 0) |
| ParseProducerInfo (); |
| return m_producer_version_update; |
| } |
| |
