| //===-- DWARFDebugInfoEntry.cpp ---------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFDebugInfoEntry.h" |
| |
| #include <assert.h> |
| |
| #include <algorithm> |
| |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/Stream.h" |
| #include "lldb/Expression/DWARFExpression.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| |
| #include "DWARFCompileUnit.h" |
| #include "SymbolFileDWARF.h" |
| #include "DWARFDebugAbbrev.h" |
| #include "DWARFDebugAranges.h" |
| #include "DWARFDebugInfo.h" |
| #include "DWARFDIECollection.h" |
| #include "DWARFFormValue.h" |
| #include "DWARFLocationDescription.h" |
| #include "DWARFLocationList.h" |
| #include "DWARFDebugRanges.h" |
| |
| using namespace lldb_private; |
| using namespace std; |
| extern int g_verbose; |
| |
| |
| |
| DWARFDebugInfoEntry::Attributes::Attributes() : |
| m_infos() |
| { |
| } |
| |
| DWARFDebugInfoEntry::Attributes::~Attributes() |
| { |
| } |
| |
| |
| uint32_t |
| DWARFDebugInfoEntry::Attributes::FindAttributeIndex(dw_attr_t attr) const |
| { |
| collection::const_iterator end = m_infos.end(); |
| collection::const_iterator beg = m_infos.begin(); |
| collection::const_iterator pos; |
| for (pos = beg; pos != end; ++pos) |
| { |
| if (pos->attr == attr) |
| return std::distance(beg, pos); |
| } |
| return UINT32_MAX; |
| } |
| |
| void |
| DWARFDebugInfoEntry::Attributes::Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form) |
| { |
| Info info = { cu, attr_die_offset, attr, form }; |
| m_infos.push_back(info); |
| } |
| |
| bool |
| DWARFDebugInfoEntry::Attributes::ContainsAttribute(dw_attr_t attr) const |
| { |
| return FindAttributeIndex(attr) != UINT32_MAX; |
| } |
| |
| bool |
| DWARFDebugInfoEntry::Attributes::RemoveAttribute(dw_attr_t attr) |
| { |
| uint32_t attr_index = FindAttributeIndex(attr); |
| if (attr_index != UINT32_MAX) |
| { |
| m_infos.erase(m_infos.begin() + attr_index); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| DWARFDebugInfoEntry::Attributes::ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const |
| { |
| form_value.SetForm(FormAtIndex(i)); |
| dw_offset_t offset = DIEOffsetAtIndex(i); |
| return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset, CompileUnitAtIndex(i)); |
| } |
| |
| uint64_t |
| DWARFDebugInfoEntry::Attributes::FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const |
| { |
| const uint32_t attr_idx = FindAttributeIndex (attr); |
| if (attr_idx != UINT32_MAX) |
| return FormValueAsUnsignedAtIndex (dwarf2Data, attr_idx, fail_value); |
| return fail_value; |
| } |
| |
| uint64_t |
| DWARFDebugInfoEntry::Attributes::FormValueAsUnsignedAtIndex(SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const |
| { |
| DWARFFormValue form_value; |
| if (ExtractFormValueAtIndex(dwarf2Data, i, form_value)) |
| return form_value.Reference(CompileUnitAtIndex(i)); |
| return fail_value; |
| } |
| |
| |
| |
| bool |
| DWARFDebugInfoEntry::FastExtract |
| ( |
| const DataExtractor& debug_info_data, |
| const DWARFCompileUnit* cu, |
| const uint8_t *fixed_form_sizes, |
| uint32_t* offset_ptr |
| ) |
| { |
| m_offset = *offset_ptr; |
| m_parent_idx = 0; |
| m_sibling_idx = 0; |
| m_empty_children = false; |
| const uint64_t abbr_idx = debug_info_data.GetULEB128 (offset_ptr); |
| assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); |
| m_abbr_idx = abbr_idx; |
| |
| //assert (fixed_form_sizes); // For best performance this should be specified! |
| |
| if (m_abbr_idx) |
| { |
| uint32_t offset = *offset_ptr; |
| |
| const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx); |
| |
| if (abbrevDecl == NULL) |
| { |
| cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid abbreviation code %u, please file a bug and attach the file at the start of this error message", |
| m_offset, |
| (unsigned)abbr_idx); |
| // WE can't parse anymore if the DWARF is borked... |
| *offset_ptr = UINT32_MAX; |
| return false; |
| } |
| m_tag = abbrevDecl->Tag(); |
| m_has_children = abbrevDecl->HasChildren(); |
| // Skip all data in the .debug_info for the attributes |
| const uint32_t numAttributes = abbrevDecl->NumAttributes(); |
| register uint32_t i; |
| register dw_form_t form; |
| for (i=0; i<numAttributes; ++i) |
| { |
| form = abbrevDecl->GetFormByIndexUnchecked(i); |
| |
| const uint8_t fixed_skip_size = fixed_form_sizes [form]; |
| if (fixed_skip_size) |
| offset += fixed_skip_size; |
| else |
| { |
| bool form_is_indirect = false; |
| do |
| { |
| form_is_indirect = false; |
| register uint32_t form_size = 0; |
| switch (form) |
| { |
| // Blocks if inlined data that have a length field and the data bytes |
| // inlined in the .debug_info |
| case DW_FORM_block : form_size = debug_info_data.GetULEB128 (&offset); break; |
| case DW_FORM_block1 : form_size = debug_info_data.GetU8_unchecked (&offset); break; |
| case DW_FORM_block2 : form_size = debug_info_data.GetU16_unchecked (&offset);break; |
| case DW_FORM_block4 : form_size = debug_info_data.GetU32_unchecked (&offset);break; |
| |
| // Inlined NULL terminated C-strings |
| case DW_FORM_string : |
| debug_info_data.GetCStr (&offset); |
| break; |
| |
| // Compile unit address sized values |
| case DW_FORM_addr : |
| case DW_FORM_ref_addr : |
| form_size = cu->GetAddressByteSize(); |
| break; |
| |
| // 1 byte values |
| case DW_FORM_data1 : |
| case DW_FORM_flag : |
| case DW_FORM_ref1 : |
| form_size = 1; |
| break; |
| |
| // 2 byte values |
| case DW_FORM_data2 : |
| case DW_FORM_ref2 : |
| form_size = 2; |
| break; |
| |
| // 4 byte values |
| case DW_FORM_strp : |
| case DW_FORM_data4 : |
| case DW_FORM_ref4 : |
| form_size = 4; |
| break; |
| |
| // 8 byte values |
| case DW_FORM_data8 : |
| case DW_FORM_ref8 : |
| form_size = 8; |
| break; |
| |
| // signed or unsigned LEB 128 values |
| case DW_FORM_sdata : |
| case DW_FORM_udata : |
| case DW_FORM_ref_udata : |
| debug_info_data.Skip_LEB128 (&offset); |
| break; |
| |
| case DW_FORM_indirect : |
| form_is_indirect = true; |
| form = debug_info_data.GetULEB128 (&offset); |
| break; |
| |
| default: |
| *offset_ptr = m_offset; |
| return false; |
| } |
| offset += form_size; |
| |
| } while (form_is_indirect); |
| } |
| } |
| *offset_ptr = offset; |
| return true; |
| } |
| else |
| { |
| m_tag = 0; |
| m_has_children = false; |
| return true; // NULL debug tag entry |
| } |
| |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Extract |
| // |
| // Extract a debug info entry for a given compile unit from the |
| // .debug_info and .debug_abbrev data within the SymbolFileDWARF class |
| // starting at the given offset |
| //---------------------------------------------------------------------- |
| bool |
| DWARFDebugInfoEntry::Extract |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| uint32_t* offset_ptr |
| ) |
| { |
| const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); |
| // const DataExtractor& debug_str_data = dwarf2Data->get_debug_str_data(); |
| const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); |
| const uint8_t cu_addr_size = cu->GetAddressByteSize(); |
| uint32_t offset = *offset_ptr; |
| // if (offset >= cu_end_offset) |
| // Log::Error("DIE at offset 0x%8.8x is beyond the end of the current compile unit (0x%8.8x)", m_offset, cu_end_offset); |
| if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) |
| { |
| m_offset = offset; |
| |
| const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset); |
| assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); |
| m_abbr_idx = abbr_idx; |
| if (abbr_idx) |
| { |
| const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx); |
| |
| if (abbrevDecl) |
| { |
| m_tag = abbrevDecl->Tag(); |
| m_has_children = abbrevDecl->HasChildren(); |
| |
| bool isCompileUnitTag = m_tag == DW_TAG_compile_unit; |
| if (cu && isCompileUnitTag) |
| ((DWARFCompileUnit*)cu)->SetBaseAddress(0); |
| |
| // Skip all data in the .debug_info for the attributes |
| const uint32_t numAttributes = abbrevDecl->NumAttributes(); |
| uint32_t i; |
| dw_attr_t attr; |
| dw_form_t form; |
| for (i=0; i<numAttributes; ++i) |
| { |
| abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); |
| |
| if (isCompileUnitTag && ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) |
| { |
| DWARFFormValue form_value(form); |
| if (form_value.ExtractValue(debug_info_data, &offset, cu)) |
| { |
| if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) |
| ((DWARFCompileUnit*)cu)->SetBaseAddress(form_value.Unsigned()); |
| } |
| } |
| else |
| { |
| bool form_is_indirect = false; |
| do |
| { |
| form_is_indirect = false; |
| register uint32_t form_size = 0; |
| switch (form) |
| { |
| // Blocks if inlined data that have a length field and the data bytes |
| // inlined in the .debug_info |
| case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break; |
| case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break; |
| case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break; |
| case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break; |
| |
| // Inlined NULL terminated C-strings |
| case DW_FORM_string : debug_info_data.GetCStr(&offset); break; |
| |
| // Compile unit address sized values |
| case DW_FORM_addr : |
| case DW_FORM_ref_addr : |
| form_size = cu_addr_size; |
| break; |
| |
| // 1 byte values |
| case DW_FORM_data1 : |
| case DW_FORM_flag : |
| case DW_FORM_ref1 : |
| form_size = 1; |
| break; |
| |
| // 2 byte values |
| case DW_FORM_data2 : |
| case DW_FORM_ref2 : |
| form_size = 2; |
| break; |
| |
| // 4 byte values |
| case DW_FORM_strp : |
| form_size = 4; |
| break; |
| |
| case DW_FORM_data4 : |
| case DW_FORM_ref4 : |
| form_size = 4; |
| break; |
| |
| // 8 byte values |
| case DW_FORM_data8 : |
| case DW_FORM_ref8 : |
| form_size = 8; |
| break; |
| |
| // signed or unsigned LEB 128 values |
| case DW_FORM_sdata : |
| case DW_FORM_udata : |
| case DW_FORM_ref_udata : |
| debug_info_data.Skip_LEB128(&offset); |
| break; |
| |
| case DW_FORM_indirect : |
| form = debug_info_data.GetULEB128(&offset); |
| form_is_indirect = true; |
| break; |
| |
| default: |
| *offset_ptr = offset; |
| return false; |
| } |
| |
| offset += form_size; |
| } while (form_is_indirect); |
| } |
| } |
| *offset_ptr = offset; |
| return true; |
| } |
| } |
| else |
| { |
| m_tag = 0; |
| m_has_children = false; |
| *offset_ptr = offset; |
| return true; // NULL debug tag entry |
| } |
| } |
| |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // DumpAncestry |
| // |
| // Dumps all of a debug information entries parents up until oldest and |
| // all of it's attributes to the specified stream. |
| //---------------------------------------------------------------------- |
| void |
| DWARFDebugInfoEntry::DumpAncestry |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const DWARFDebugInfoEntry* oldest, |
| Stream &s, |
| uint32_t recurse_depth |
| ) const |
| { |
| const DWARFDebugInfoEntry* parent = GetParent(); |
| if (parent && parent != oldest) |
| parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); |
| Dump(dwarf2Data, cu, s, recurse_depth); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Compare two DIE by comparing all their attributes values, and |
| // following all DW_FORM_ref attributes and comparing their contents as |
| // well (except for DW_AT_sibling attributes. |
| // |
| // DWARFDebugInfoEntry::CompareState compare_state; |
| // int result = DWARFDebugInfoEntry::Compare(this, 0x00017ccb, 0x0001eb2b, compare_state, false, true); |
| //---------------------------------------------------------------------- |
| //int |
| //DWARFDebugInfoEntry::Compare |
| //( |
| // SymbolFileDWARF* dwarf2Data, |
| // dw_offset_t a_die_offset, |
| // dw_offset_t b_die_offset, |
| // CompareState &compare_state, |
| // bool compare_siblings, |
| // bool compare_children |
| //) |
| //{ |
| // if (a_die_offset == b_die_offset) |
| // return 0; |
| // |
| // DWARFCompileUnitSP a_cu_sp; |
| // DWARFCompileUnitSP b_cu_sp; |
| // const DWARFDebugInfoEntry* a_die = dwarf2Data->DebugInfo()->GetDIEPtr(a_die_offset, &a_cu_sp); |
| // const DWARFDebugInfoEntry* b_die = dwarf2Data->DebugInfo()->GetDIEPtr(b_die_offset, &b_cu_sp); |
| // |
| // return Compare(dwarf2Data, a_cu_sp.get(), a_die, b_cu_sp.get(), b_die, compare_state, compare_siblings, compare_children); |
| //} |
| // |
| //int |
| //DWARFDebugInfoEntry::Compare |
| //( |
| // SymbolFileDWARF* dwarf2Data, |
| // DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die, |
| // DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die, |
| // CompareState &compare_state, |
| // bool compare_siblings, |
| // bool compare_children |
| //) |
| //{ |
| // if (a_die == b_die) |
| // return 0; |
| // |
| // if (!compare_state.AddTypePair(a_die->GetOffset(), b_die->GetOffset())) |
| // { |
| // // We are already comparing both of these types, so let |
| // // compares complete for the real result |
| // return 0; |
| // } |
| // |
| // //printf("DWARFDebugInfoEntry::Compare(0x%8.8x, 0x%8.8x)\n", a_die->GetOffset(), b_die->GetOffset()); |
| // |
| // // Do we have two valid DIEs? |
| // if (a_die && b_die) |
| // { |
| // // Both DIE are valid |
| // int result = 0; |
| // |
| // const dw_tag_t a_tag = a_die->Tag(); |
| // const dw_tag_t b_tag = b_die->Tag(); |
| // if (a_tag == 0 && b_tag == 0) |
| // return 0; |
| // |
| // //printf(" comparing tags: %s and %s\n", DW_TAG_value_to_name(a_tag), DW_TAG_value_to_name(b_tag)); |
| // |
| // if (a_tag < b_tag) |
| // return -1; |
| // else if (a_tag > b_tag) |
| // return 1; |
| // |
| // DWARFDebugInfoEntry::Attributes a_attrs; |
| // DWARFDebugInfoEntry::Attributes b_attrs; |
| // size_t a_attr_count = a_die->GetAttributes(dwarf2Data, a_cu, a_attrs); |
| // size_t b_attr_count = b_die->GetAttributes(dwarf2Data, b_cu, b_attrs); |
| // if (a_attr_count != b_attr_count) |
| // { |
| // a_attrs.RemoveAttribute(DW_AT_sibling); |
| // b_attrs.RemoveAttribute(DW_AT_sibling); |
| // } |
| // |
| // a_attr_count = a_attrs.Size(); |
| // b_attr_count = b_attrs.Size(); |
| // |
| // DWARFFormValue a_form_value; |
| // DWARFFormValue b_form_value; |
| // |
| // if (a_attr_count != b_attr_count) |
| // { |
| // uint32_t is_decl_index = a_attrs.FindAttributeIndex(DW_AT_declaration); |
| // uint32_t a_name_index = UINT32_MAX; |
| // uint32_t b_name_index = UINT32_MAX; |
| // if (is_decl_index != UINT32_MAX) |
| // { |
| // if (a_attr_count == 2) |
| // { |
| // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); |
| // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); |
| // } |
| // } |
| // else |
| // { |
| // is_decl_index = b_attrs.FindAttributeIndex(DW_AT_declaration); |
| // if (is_decl_index != UINT32_MAX && a_attr_count == 2) |
| // { |
| // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); |
| // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); |
| // } |
| // } |
| // if (a_name_index != UINT32_MAX && b_name_index != UINT32_MAX) |
| // { |
| // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, a_name_index, a_form_value) && |
| // b_attrs.ExtractFormValueAtIndex(dwarf2Data, b_name_index, b_form_value)) |
| // { |
| // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, &dwarf2Data->get_debug_str_data()); |
| // if (result == 0) |
| // { |
| // a_attr_count = b_attr_count = 0; |
| // compare_children = false; |
| // } |
| // } |
| // } |
| // } |
| // |
| // if (a_attr_count < b_attr_count) |
| // return -1; |
| // if (a_attr_count > b_attr_count) |
| // return 1; |
| // |
| // |
| // // The number of attributes are the same... |
| // if (a_attr_count > 0) |
| // { |
| // const DataExtractor* debug_str_data_ptr = &dwarf2Data->get_debug_str_data(); |
| // |
| // uint32_t i; |
| // for (i=0; i<a_attr_count; ++i) |
| // { |
| // const dw_attr_t a_attr = a_attrs.AttributeAtIndex(i); |
| // const dw_attr_t b_attr = b_attrs.AttributeAtIndex(i); |
| // //printf(" comparing attributes\n\t\t0x%8.8x: %s %s\t\t0x%8.8x: %s %s\n", |
| // // a_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(a_attrs.FormAtIndex(i)), DW_AT_value_to_name(a_attr), |
| // // b_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(b_attrs.FormAtIndex(i)), DW_AT_value_to_name(b_attr)); |
| // |
| // if (a_attr < b_attr) |
| // return -1; |
| // else if (a_attr > b_attr) |
| // return 1; |
| // |
| // switch (a_attr) |
| // { |
| // // Since we call a form of GetAttributes which inlines the |
| // // attributes from DW_AT_abstract_origin and DW_AT_specification |
| // // we don't care if their values mismatch... |
| // case DW_AT_abstract_origin: |
| // case DW_AT_specification: |
| // case DW_AT_sibling: |
| // case DW_AT_containing_type: |
| // //printf(" action = IGNORE\n"); |
| // result = 0; |
| // break; // ignore |
| // |
| // default: |
| // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, i, a_form_value) && |
| // b_attrs.ExtractFormValueAtIndex(dwarf2Data, i, b_form_value)) |
| // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, debug_str_data_ptr); |
| // break; |
| // } |
| // |
| // //printf("\t result = %i\n", result); |
| // |
| // if (result != 0) |
| // { |
| // // Attributes weren't equal, lets see if we care? |
| // switch (a_attr) |
| // { |
| // case DW_AT_decl_file: |
| // // TODO: add the ability to compare files in two different compile units |
| // if (a_cu == b_cu) |
| // { |
| // //printf(" action = RETURN RESULT\n"); |
| // return result; // Only return the compare results when the compile units are the same and the decl_file attributes can be compared |
| // } |
| // else |
| // { |
| // result = 0; |
| // //printf(" action = IGNORE\n"); |
| // } |
| // break; |
| // |
| // default: |
| // switch (a_attrs.FormAtIndex(i)) |
| // { |
| // case DW_FORM_ref1: |
| // case DW_FORM_ref2: |
| // case DW_FORM_ref4: |
| // case DW_FORM_ref8: |
| // case DW_FORM_ref_udata: |
| // case DW_FORM_ref_addr: |
| // //printf(" action = COMPARE DIEs 0x%8.8x 0x%8.8x\n", (dw_offset_t)a_form_value.Reference(a_cu), (dw_offset_t)b_form_value.Reference(b_cu)); |
| // // These attribute values refer to other DIEs, so lets compare those instead of their DIE offsets... |
| // result = Compare(dwarf2Data, a_form_value.Reference(a_cu), b_form_value.Reference(b_cu), compare_state, false, true); |
| // if (result != 0) |
| // return result; |
| // break; |
| // |
| // default: |
| // // We do care that they were different, return this result... |
| // //printf(" action = RETURN RESULT\n"); |
| // return result; |
| // } |
| // } |
| // } |
| // } |
| // } |
| // //printf(" SUCCESS\n\t\t0x%8.8x: %s\n\t\t0x%8.8x: %s\n", a_die->GetOffset(), DW_TAG_value_to_name(a_tag), b_die->GetOffset(), DW_TAG_value_to_name(b_tag)); |
| // |
| // if (compare_children) |
| // { |
| // bool a_has_children = a_die->HasChildren(); |
| // bool b_has_children = b_die->HasChildren(); |
| // if (a_has_children == b_has_children) |
| // { |
| // // Both either have kids or don't |
| // if (a_has_children) |
| // result = Compare( dwarf2Data, |
| // a_cu, a_die->GetFirstChild(), |
| // b_cu, b_die->GetFirstChild(), |
| // compare_state, true, compare_children); |
| // else |
| // result = 0; |
| // } |
| // else if (!a_has_children) |
| // result = -1; // A doesn't have kids, but B does |
| // else |
| // result = 1; // A has kids, but B doesn't |
| // } |
| // |
| // if (compare_siblings) |
| // { |
| // result = Compare( dwarf2Data, |
| // a_cu, a_die->GetSibling(), |
| // b_cu, b_die->GetSibling(), |
| // compare_state, true, compare_children); |
| // } |
| // |
| // return result; |
| // } |
| // |
| // if (a_die == NULL) |
| // return -1; // a_die is NULL, yet b_die is non-NULL |
| // else |
| // return 1; // a_die is non-NULL, yet b_die is NULL |
| // |
| //} |
| // |
| // |
| //int |
| //DWARFDebugInfoEntry::Compare |
| //( |
| // SymbolFileDWARF* dwarf2Data, |
| // const DWARFCompileUnit* cu_a, |
| // const DWARFDebugInfoEntry* die_a, |
| // const DWARFCompileUnit* cu_a, |
| // const DWARFDebugInfoEntry* die_b, |
| // CompareState &compare_state |
| //) |
| //{ |
| //} |
| |
| //---------------------------------------------------------------------- |
| // GetDIENamesAndRanges |
| // |
| // Gets the valid address ranges for a given DIE by looking for a |
| // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges |
| // attributes. |
| //---------------------------------------------------------------------- |
| bool |
| DWARFDebugInfoEntry::GetDIENamesAndRanges |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const char * &name, |
| const char * &mangled, |
| DWARFDebugRanges::RangeList& ranges, |
| int& decl_file, |
| int& decl_line, |
| int& decl_column, |
| int& call_file, |
| int& call_line, |
| int& call_column, |
| DWARFExpression *frame_base |
| ) const |
| { |
| if (dwarf2Data == NULL) |
| return false; |
| |
| dw_addr_t lo_pc = DW_INVALID_ADDRESS; |
| dw_addr_t hi_pc = DW_INVALID_ADDRESS; |
| std::vector<dw_offset_t> die_offsets; |
| bool set_frame_base_loclist_addr = false; |
| |
| dw_offset_t offset; |
| const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); |
| |
| if (abbrevDecl) |
| { |
| const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); |
| |
| if (!debug_info_data.ValidOffset(offset)) |
| return false; |
| |
| const uint32_t numAttributes = abbrevDecl->NumAttributes(); |
| uint32_t i; |
| dw_attr_t attr; |
| dw_form_t form; |
| for (i=0; i<numAttributes; ++i) |
| { |
| abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); |
| DWARFFormValue form_value(form); |
| if (form_value.ExtractValue(debug_info_data, &offset, cu)) |
| { |
| switch (attr) |
| { |
| case DW_AT_low_pc: |
| case DW_AT_entry_pc: |
| lo_pc = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_high_pc: |
| hi_pc = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_ranges: |
| { |
| const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); |
| debug_ranges->FindRanges(form_value.Unsigned(), ranges); |
| // All DW_AT_ranges are relative to the base address of the |
| // compile unit. We add the compile unit base address to make |
| // sure all the addresses are properly fixed up. |
| ranges.Slide(cu->GetBaseAddress()); |
| } |
| break; |
| |
| case DW_AT_name: |
| if (name == NULL) |
| name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| break; |
| |
| case DW_AT_MIPS_linkage_name: |
| if (mangled == NULL) |
| mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| break; |
| |
| case DW_AT_abstract_origin: |
| die_offsets.push_back(form_value.Reference(cu)); |
| break; |
| |
| case DW_AT_specification: |
| die_offsets.push_back(form_value.Reference(cu)); |
| break; |
| |
| case DW_AT_decl_file: |
| if (decl_file == 0) |
| decl_file = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_decl_line: |
| if (decl_line == 0) |
| decl_line = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_decl_column: |
| if (decl_column == 0) |
| decl_column = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_file: |
| if (call_file == 0) |
| call_file = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_line: |
| if (call_line == 0) |
| call_line = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_column: |
| if (call_column == 0) |
| call_column = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_frame_base: |
| if (frame_base) |
| { |
| if (form_value.BlockData()) |
| { |
| uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); |
| uint32_t block_length = form_value.Unsigned(); |
| frame_base->SetOpcodeData(debug_info_data, block_offset, block_length); |
| } |
| else |
| { |
| const DataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data(); |
| const dw_offset_t debug_loc_offset = form_value.Unsigned(); |
| |
| size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset); |
| if (loc_list_length > 0) |
| { |
| frame_base->SetOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length); |
| if (lo_pc != DW_INVALID_ADDRESS) |
| { |
| assert (lo_pc >= cu->GetBaseAddress()); |
| frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress()); |
| } |
| else |
| { |
| set_frame_base_loclist_addr = true; |
| } |
| } |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| } |
| |
| if (ranges.IsEmpty()) |
| { |
| if (lo_pc != DW_INVALID_ADDRESS) |
| { |
| if (hi_pc != DW_INVALID_ADDRESS && hi_pc > lo_pc) |
| ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc)); |
| else |
| ranges.Append(DWARFDebugRanges::Range (lo_pc, 0)); |
| } |
| } |
| |
| if (set_frame_base_loclist_addr) |
| { |
| dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); |
| assert (lowest_range_pc >= cu->GetBaseAddress()); |
| frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress()); |
| } |
| |
| if (ranges.IsEmpty() || name == NULL || mangled == NULL) |
| { |
| std::vector<dw_offset_t>::const_iterator pos; |
| std::vector<dw_offset_t>::const_iterator end = die_offsets.end(); |
| for (pos = die_offsets.begin(); pos != end; ++pos) |
| { |
| DWARFCompileUnitSP cu_sp_ptr; |
| const DWARFDebugInfoEntry* die = NULL; |
| dw_offset_t die_offset = *pos; |
| if (die_offset != DW_INVALID_OFFSET) |
| { |
| die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); |
| if (die) |
| die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column); |
| } |
| } |
| } |
| return !ranges.IsEmpty(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Dump |
| // |
| // Dumps a debug information entry and all of it's attributes to the |
| // specified stream. |
| //---------------------------------------------------------------------- |
| void |
| DWARFDebugInfoEntry::Dump |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| Stream &s, |
| uint32_t recurse_depth |
| ) const |
| { |
| const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); |
| uint32_t offset = m_offset; |
| |
| if (debug_info_data.ValidOffset(offset)) |
| { |
| dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); |
| |
| s.Printf("\n0x%8.8x: ", m_offset); |
| s.Indent(); |
| if (abbrCode != m_abbr_idx) |
| { |
| s.Printf( "error: DWARF has been modified\n"); |
| } |
| else if (abbrCode) |
| { |
| const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode); |
| |
| if (abbrevDecl) |
| { |
| s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); |
| s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' '); |
| |
| // Dump all data in the .debug_info for the attributes |
| const uint32_t numAttributes = abbrevDecl->NumAttributes(); |
| uint32_t i; |
| dw_attr_t attr; |
| dw_form_t form; |
| for (i=0; i<numAttributes; ++i) |
| { |
| abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); |
| |
| DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form); |
| } |
| |
| const DWARFDebugInfoEntry* child = GetFirstChild(); |
| if (recurse_depth > 0 && child) |
| { |
| s.IndentMore(); |
| |
| while (child) |
| { |
| child->Dump(dwarf2Data, cu, s, recurse_depth-1); |
| child = child->GetSibling(); |
| } |
| s.IndentLess(); |
| } |
| } |
| else |
| s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode); |
| } |
| else |
| { |
| s.Printf( "NULL\n"); |
| } |
| } |
| } |
| |
| void |
| DWARFDebugInfoEntry::DumpLocation |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu, |
| Stream &s |
| ) const |
| { |
| const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly(); |
| const char *cu_name = NULL; |
| if (cu_die != NULL) |
| cu_name = cu_die->GetName (dwarf2Data, cu); |
| const char *obj_file_name = NULL; |
| ObjectFile *obj_file = dwarf2Data->GetObjectFile(); |
| if (obj_file) |
| obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString(); |
| const char *die_name = GetName (dwarf2Data, cu); |
| s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", |
| cu->GetOffset(), |
| GetOffset(), |
| die_name ? die_name : "", |
| cu_name ? cu_name : "<NULL>", |
| obj_file_name ? obj_file_name : "<NULL>"); |
| } |
| |
| //---------------------------------------------------------------------- |
| // DumpAttribute |
| // |
| // Dumps a debug information entry attribute along with it's form. Any |
| // special display of attributes is done (disassemble location lists, |
| // show enumeration values for attributes, etc). |
| //---------------------------------------------------------------------- |
| void |
| DWARFDebugInfoEntry::DumpAttribute |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const DataExtractor& debug_info_data, |
| uint32_t* offset_ptr, |
| Stream &s, |
| dw_attr_t attr, |
| dw_form_t form |
| ) |
| { |
| bool verbose = s.GetVerbose(); |
| bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); |
| const DataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL; |
| if (verbose) |
| s.Offset (*offset_ptr); |
| else |
| s.Printf (" "); |
| s.Indent(DW_AT_value_to_name(attr)); |
| |
| if (show_form) |
| { |
| s.Printf( "[%s", DW_FORM_value_to_name(form)); |
| } |
| |
| DWARFFormValue form_value(form); |
| |
| if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu)) |
| return; |
| |
| if (show_form) |
| { |
| if (form == DW_FORM_indirect) |
| { |
| s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form())); |
| } |
| |
| s.PutCString("] "); |
| } |
| |
| s.PutCString("( "); |
| |
| // Always dump form value if verbose is enabled |
| if (verbose) |
| { |
| form_value.Dump(s, debug_str_data, cu); |
| } |
| |
| |
| // Check to see if we have any special attribute formatters |
| switch (attr) |
| { |
| case DW_AT_stmt_list: |
| if ( verbose ) s.PutCString(" ( "); |
| s.Printf( "0x%8.8llx", form_value.Unsigned()); |
| if ( verbose ) s.PutCString(" )"); |
| break; |
| |
| case DW_AT_language: |
| if ( verbose ) s.PutCString(" ( "); |
| s.PutCString(DW_LANG_value_to_name(form_value.Unsigned())); |
| if ( verbose ) s.PutCString(" )"); |
| break; |
| |
| case DW_AT_encoding: |
| if ( verbose ) s.PutCString(" ( "); |
| s.PutCString(DW_ATE_value_to_name(form_value.Unsigned())); |
| if ( verbose ) s.PutCString(" )"); |
| break; |
| |
| case DW_AT_frame_base: |
| case DW_AT_location: |
| case DW_AT_data_member_location: |
| { |
| const uint8_t* blockData = form_value.BlockData(); |
| if (blockData) |
| { |
| if (!verbose) |
| form_value.Dump(s, debug_str_data, cu); |
| |
| // Location description is inlined in data in the form value |
| DataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned()); |
| if ( verbose ) s.PutCString(" ( "); |
| print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); |
| if ( verbose ) s.PutCString(" )"); |
| } |
| else |
| { |
| // We have a location list offset as the value that is |
| // the offset into the .debug_loc section that describes |
| // the value over it's lifetime |
| uint64_t debug_loc_offset = form_value.Unsigned(); |
| if (dwarf2Data) |
| { |
| if ( !verbose ) |
| form_value.Dump(s, debug_str_data, cu); |
| DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); |
| } |
| else |
| { |
| if ( !verbose ) |
| form_value.Dump(s, NULL, cu); |
| } |
| } |
| } |
| break; |
| |
| case DW_AT_abstract_origin: |
| case DW_AT_specification: |
| { |
| uint64_t abstract_die_offset = form_value.Reference(cu); |
| form_value.Dump(s, debug_str_data, cu); |
| // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; |
| if ( verbose ) s.PutCString(" ( "); |
| GetName(dwarf2Data, cu, abstract_die_offset, s); |
| if ( verbose ) s.PutCString(" )"); |
| } |
| break; |
| |
| case DW_AT_type: |
| { |
| uint64_t type_die_offset = form_value.Reference(cu); |
| if (!verbose) |
| form_value.Dump(s, debug_str_data, cu); |
| s.PutCString(" ( "); |
| AppendTypeName(dwarf2Data, cu, type_die_offset, s); |
| s.PutCString(" )"); |
| } |
| break; |
| |
| case DW_AT_ranges: |
| { |
| if ( !verbose ) |
| form_value.Dump(s, debug_str_data, cu); |
| uint32_t ranges_offset = form_value.Unsigned(); |
| dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; |
| DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr); |
| } |
| break; |
| |
| default: |
| if ( !verbose ) |
| form_value.Dump(s, debug_str_data, cu); |
| break; |
| } |
| |
| s.PutCString(" )\n"); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Get all attribute values for a given DIE, including following any |
| // specification or abstract origin attributes and including those in |
| // the results. Any duplicate attributes will have the first instance |
| // take precedence (this can happen for declaration attributes). |
| //---------------------------------------------------------------------- |
| size_t |
| DWARFDebugInfoEntry::GetAttributes |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const uint8_t *fixed_form_sizes, |
| DWARFDebugInfoEntry::Attributes& attributes, |
| uint32_t curr_depth |
| ) const |
| { |
| uint32_t offset; |
| const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); |
| |
| if (abbrevDecl) |
| { |
| const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); |
| |
| if (fixed_form_sizes == NULL) |
| fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize()); |
| |
| const uint32_t num_attributes = abbrevDecl->NumAttributes(); |
| uint32_t i; |
| dw_attr_t attr; |
| dw_form_t form; |
| DWARFFormValue form_value; |
| for (i=0; i<num_attributes; ++i) |
| { |
| abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form); |
| |
| // If we are tracking down DW_AT_specification or DW_AT_abstract_origin |
| // attributes, the depth will be non-zero. We need to omit certain |
| // attributes that don't make sense. |
| switch (attr) |
| { |
| case DW_AT_sibling: |
| case DW_AT_declaration: |
| if (curr_depth > 0) |
| { |
| // This attribute doesn't make sense when combined with |
| // the DIE that references this DIE. We know a DIE is |
| // referencing this DIE because curr_depth is not zero |
| break; |
| } |
| // Fall through... |
| default: |
| attributes.Append(cu, offset, attr, form); |
| break; |
| } |
| |
| if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) |
| { |
| form_value.SetForm(form); |
| if (form_value.ExtractValue(debug_info_data, &offset, cu)) |
| { |
| const DWARFDebugInfoEntry* die = NULL; |
| dw_offset_t die_offset = form_value.Reference(cu); |
| if (cu->ContainsDIEOffset(die_offset)) |
| { |
| die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset); |
| if (die) |
| die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1); |
| } |
| else |
| { |
| DWARFCompileUnitSP cu_sp_ptr; |
| die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); |
| if (die) |
| die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1); |
| } |
| } |
| } |
| else |
| { |
| const uint8_t fixed_skip_size = fixed_form_sizes [form]; |
| if (fixed_skip_size) |
| offset += fixed_skip_size; |
| else |
| DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); |
| } |
| } |
| } |
| else |
| { |
| attributes.Clear(); |
| } |
| return attributes.Size(); |
| |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValue |
| // |
| // Get the value of an attribute and return the .debug_info offset of the |
| // attribute if it was properly extracted into form_value, or zero |
| // if we fail since an offset of zero is invalid for an attribute (it |
| // would be a compile unit header). |
| //---------------------------------------------------------------------- |
| dw_offset_t |
| DWARFDebugInfoEntry::GetAttributeValue |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| DWARFFormValue& form_value, |
| dw_offset_t* end_attr_offset_ptr |
| ) const |
| { |
| uint32_t offset; |
| const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); |
| |
| if (abbrevDecl) |
| { |
| uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); |
| |
| if (attr_idx != DW_INVALID_INDEX) |
| { |
| const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); |
| |
| uint32_t idx=0; |
| while (idx<attr_idx) |
| DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu); |
| |
| const dw_offset_t attr_offset = offset; |
| form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); |
| if (form_value.ExtractValue(debug_info_data, &offset, cu)) |
| { |
| if (end_attr_offset_ptr) |
| *end_attr_offset_ptr = offset; |
| return attr_offset; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValueAsString |
| // |
| // Get the value of an attribute as a string return it. The resulting |
| // pointer to the string data exists within the supplied SymbolFileDWARF |
| // and will only be available as long as the SymbolFileDWARF is still around |
| // and it's content doesn't change. |
| //---------------------------------------------------------------------- |
| const char* |
| DWARFDebugInfoEntry::GetAttributeValueAsString |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| const char* fail_value) const |
| { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) |
| return form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| return fail_value; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValueAsUnsigned |
| // |
| // Get the value of an attribute as unsigned and return it. |
| //---------------------------------------------------------------------- |
| uint64_t |
| DWARFDebugInfoEntry::GetAttributeValueAsUnsigned |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| uint64_t fail_value |
| ) const |
| { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) |
| return form_value.Unsigned(); |
| return fail_value; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValueAsSigned |
| // |
| // Get the value of an attribute a signed value and return it. |
| //---------------------------------------------------------------------- |
| int64_t |
| DWARFDebugInfoEntry::GetAttributeValueAsSigned |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| int64_t fail_value |
| ) const |
| { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) |
| return form_value.Signed(); |
| return fail_value; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValueAsReference |
| // |
| // Get the value of an attribute as reference and fix up and compile |
| // unit relative offsets as needed. |
| //---------------------------------------------------------------------- |
| uint64_t |
| DWARFDebugInfoEntry::GetAttributeValueAsReference |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| uint64_t fail_value |
| ) const |
| { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) |
| return form_value.Reference(cu); |
| return fail_value; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetAttributeValueAsLocation |
| // |
| // Get the value of an attribute as reference and fix up and compile |
| // unit relative offsets as needed. |
| //---------------------------------------------------------------------- |
| dw_offset_t |
| DWARFDebugInfoEntry::GetAttributeValueAsLocation |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const dw_attr_t attr, |
| DataExtractor& location_data, |
| uint32_t &block_size |
| ) const |
| { |
| block_size = 0; |
| DWARFFormValue form_value; |
| |
| // Empty out data in case we don't find anything |
| location_data.Clear(); |
| dw_offset_t end_addr_offset = DW_INVALID_OFFSET; |
| const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset); |
| if (attr_offset) |
| { |
| const uint8_t* blockData = form_value.BlockData(); |
| if (blockData) |
| { |
| // We have an inlined location list in the .debug_info section |
| const DataExtractor& debug_info = dwarf2Data->get_debug_info_data(); |
| dw_offset_t block_offset = blockData - debug_info.GetDataStart(); |
| block_size = (end_addr_offset - attr_offset) - form_value.Unsigned(); |
| location_data.SetData(debug_info, block_offset, block_size); |
| } |
| else |
| { |
| // We have a location list offset as the value that is |
| // the offset into the .debug_loc section that describes |
| // the value over it's lifetime |
| dw_offset_t debug_loc_offset = form_value.Unsigned(); |
| if (dwarf2Data) |
| { |
| assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize()); |
| return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data); |
| } |
| } |
| } |
| return attr_offset; |
| } |
| |
| //---------------------------------------------------------------------- |
| // GetName |
| // |
| // Get value of the DW_AT_name attribute and return it if one exists, |
| // else return NULL. |
| //---------------------------------------------------------------------- |
| const char* |
| DWARFDebugInfoEntry::GetName |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu |
| ) const |
| { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) |
| return form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| return NULL; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // GetMangledName |
| // |
| // Get value of the DW_AT_MIPS_linkage_name attribute and return it if |
| // one exists, else return the value of the DW_AT_name attribute |
| //---------------------------------------------------------------------- |
| const char* |
| DWARFDebugInfoEntry::GetMangledName |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| bool substitute_name_allowed |
| ) const |
| { |
| const char* name = NULL; |
| DWARFFormValue form_value; |
| |
| if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) |
| name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| |
| if (substitute_name_allowed && name == NULL) |
| { |
| if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) |
| name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| } |
| return name; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // GetPubname |
| // |
| // Get value the name for a DIE as it should appear for a |
| // .debug_pubnames or .debug_pubtypes section. |
| //---------------------------------------------------------------------- |
| const char* |
| DWARFDebugInfoEntry::GetPubname |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu |
| ) const |
| { |
| const char* name = NULL; |
| DWARFFormValue form_value; |
| |
| if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) |
| name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) |
| name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) |
| { |
| // The specification DIE may be in another compile unit so we need |
| // to get a die and its compile unit. |
| DWARFCompileUnitSP cu_sp_ptr; |
| const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); |
| if (die) |
| return die->GetPubname(dwarf2Data, cu_sp_ptr.get()); |
| } |
| return name; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // GetName |
| // |
| // Get value of the DW_AT_name attribute for a debug information entry |
| // that exists at offset "die_offset" and place that value into the |
| // supplied stream object. If the DIE is a NULL object "NULL" is placed |
| // into the stream, and if no DW_AT_name attribute exists for the DIE |
| // then nothing is printed. |
| //---------------------------------------------------------------------- |
| bool |
| DWARFDebugInfoEntry::GetName |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const uint32_t die_offset, |
| Stream &s |
| ) |
| { |
| DWARFDebugInfoEntry die; |
| uint32_t offset = die_offset; |
| if (die.Extract(dwarf2Data, cu, &offset)) |
| { |
| if (die.IsNULL()) |
| { |
| s.PutCString("NULL"); |
| return true; |
| } |
| else |
| { |
| DWARFFormValue form_value; |
| if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) |
| { |
| const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| if (name) |
| { |
| s.PutCString(name); |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // AppendTypeName |
| // |
| // Follows the type name definition down through all needed tags to |
| // end up with a fully qualified type name and dump the results to |
| // the supplied stream. This is used to show the name of types given |
| // a type identifier. |
| //---------------------------------------------------------------------- |
| bool |
| DWARFDebugInfoEntry::AppendTypeName |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| const uint32_t die_offset, |
| Stream &s |
| ) |
| { |
| DWARFDebugInfoEntry die; |
| uint32_t offset = die_offset; |
| if (die.Extract(dwarf2Data, cu, &offset)) |
| { |
| if (die.IsNULL()) |
| { |
| s.PutCString("NULL"); |
| return true; |
| } |
| else |
| { |
| const char* name = die.GetPubname(dwarf2Data, cu); |
| // if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) |
| // name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); |
| if (name) |
| s.PutCString(name); |
| else |
| { |
| bool result = true; |
| const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); |
| |
| switch (abbrevDecl->Tag()) |
| { |
| case DW_TAG_array_type: break; // print out a "[]" after printing the full type of the element below |
| case DW_TAG_base_type: s.PutCString("base "); break; |
| case DW_TAG_class_type: s.PutCString("class "); break; |
| case DW_TAG_const_type: s.PutCString("const "); break; |
| case DW_TAG_enumeration_type: s.PutCString("enum "); break; |
| case DW_TAG_file_type: s.PutCString("file "); break; |
| case DW_TAG_interface_type: s.PutCString("interface "); break; |
| case DW_TAG_packed_type: s.PutCString("packed "); break; |
| case DW_TAG_pointer_type: break; // print out a '*' after printing the full type below |
| case DW_TAG_ptr_to_member_type: break; // print out a '*' after printing the full type below |
| case DW_TAG_reference_type: break; // print out a '&' after printing the full type below |
| case DW_TAG_restrict_type: s.PutCString("restrict "); break; |
| case DW_TAG_set_type: s.PutCString("set "); break; |
| case DW_TAG_shared_type: s.PutCString("shared "); break; |
| case DW_TAG_string_type: s.PutCString("string "); break; |
| case DW_TAG_structure_type: s.PutCString("struct "); break; |
| case DW_TAG_subrange_type: s.PutCString("subrange "); break; |
| case DW_TAG_subroutine_type: s.PutCString("function "); break; |
| case DW_TAG_thrown_type: s.PutCString("thrown "); break; |
| case DW_TAG_union_type: s.PutCString("union "); break; |
| case DW_TAG_unspecified_type: s.PutCString("unspecified "); break; |
| case DW_TAG_volatile_type: s.PutCString("volatile "); break; |
| default: |
| return false; |
| } |
| |
| // Follow the DW_AT_type if possible |
| DWARFFormValue form_value; |
| if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) |
| { |
| uint64_t next_die_offset = form_value.Reference(cu); |
| result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); |
| } |
| |
| switch (abbrevDecl->Tag()) |
| { |
| case DW_TAG_array_type: s.PutCString("[]"); break; |
| case DW_TAG_pointer_type: s.PutChar('*'); break; |
| case DW_TAG_ptr_to_member_type: s.PutChar('*'); break; |
| case DW_TAG_reference_type: s.PutChar('&'); break; |
| default: |
| break; |
| } |
| return result; |
| } |
| } |
| } |
| return false; |
| } |
| |
| bool |
| DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const |
| { |
| if (die) |
| { |
| const dw_offset_t die_offset = die->GetOffset(); |
| if (die_offset > GetOffset()) |
| { |
| const DWARFDebugInfoEntry *sibling = GetSibling(); |
| assert (sibling); // TODO: take this out |
| if (sibling) |
| return die_offset < sibling->GetOffset(); |
| } |
| } |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // BuildAddressRangeTable |
| //---------------------------------------------------------------------- |
| void |
| DWARFDebugInfoEntry::BuildAddressRangeTable |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| DWARFDebugAranges* debug_aranges |
| ) const |
| { |
| if (m_tag) |
| { |
| if (m_tag == DW_TAG_subprogram) |
| { |
| dw_addr_t hi_pc = DW_INVALID_ADDRESS; |
| dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); |
| if (lo_pc != DW_INVALID_ADDRESS) |
| hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); |
| if (hi_pc != DW_INVALID_ADDRESS) |
| { |
| /// printf("BuildAddressRangeTable() 0x%8.8x: %30s: [0x%8.8x - 0x%8.8x)\n", m_offset, DW_TAG_value_to_name(tag), lo_pc, hi_pc); |
| debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc); |
| } |
| } |
| |
| |
| const DWARFDebugInfoEntry* child = GetFirstChild(); |
| while (child) |
| { |
| child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); |
| child = child->GetSibling(); |
| } |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // BuildFunctionAddressRangeTable |
| // |
| // This function is very similar to the BuildAddressRangeTable function |
| // except that the actual DIE offset for the function is placed in the |
| // table instead of the compile unit offset (which is the way the |
| // standard .debug_aranges section does it). |
| //---------------------------------------------------------------------- |
| void |
| DWARFDebugInfoEntry::BuildFunctionAddressRangeTable |
| ( |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| DWARFDebugAranges* debug_aranges |
| ) const |
| { |
| if (m_tag) |
| { |
| if (m_tag == DW_TAG_subprogram) |
| { |
| dw_addr_t hi_pc = DW_INVALID_ADDRESS; |
| dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); |
| if (lo_pc != DW_INVALID_ADDRESS) |
| hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); |
| if (hi_pc != DW_INVALID_ADDRESS) |
| { |
| // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16llx - 0x%16.16llx)\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY |
| debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc); |
| } |
| } |
| |
| const DWARFDebugInfoEntry* child = GetFirstChild(); |
| while (child) |
| { |
| child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); |
| child = child->GetSibling(); |
| } |
| } |
| } |
| |
| void |
| DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu, |
| DWARFDIECollection &decl_context_dies) const |
| { |
| const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); |
| if (parent_decl_ctx_die && parent_decl_ctx_die != this) |
| { |
| decl_context_dies.Append(parent_decl_ctx_die); |
| parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies); |
| } |
| } |
| |
| const DWARFDebugInfoEntry * |
| DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu) const |
| { |
| DWARFDebugInfoEntry::Attributes attributes; |
| GetAttributes(dwarf2Data, cu, NULL, attributes); |
| return GetParentDeclContextDIE (dwarf2Data, cu, attributes); |
| } |
| |
| const DWARFDebugInfoEntry * |
| DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu, |
| const DWARFDebugInfoEntry::Attributes& attributes) const |
| { |
| const DWARFDebugInfoEntry * die = this; |
| |
| while (die != NULL) |
| { |
| // If this is the original DIE that we are searching for a declaration |
| // for, then don't look in the cache as we don't want our own decl |
| // context to be our decl context... |
| if (die != this) |
| { |
| switch (die->Tag()) |
| { |
| case DW_TAG_compile_unit: |
| case DW_TAG_namespace: |
| case DW_TAG_structure_type: |
| case DW_TAG_union_type: |
| case DW_TAG_class_type: |
| return die; |
| |
| default: |
| break; |
| } |
| } |
| |
| dw_offset_t die_offset; |
| |
| die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET); |
| if (die_offset != DW_INVALID_OFFSET) |
| { |
| const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset); |
| if (spec_die) |
| { |
| const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu); |
| if (spec_die_decl_ctx_die) |
| return spec_die_decl_ctx_die; |
| } |
| } |
| |
| die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET); |
| if (die_offset != DW_INVALID_OFFSET) |
| { |
| const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset); |
| if (abs_die) |
| { |
| const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu); |
| if (abs_die_decl_ctx_die) |
| return abs_die_decl_ctx_die; |
| } |
| } |
| |
| die = die->GetParent(); |
| } |
| return NULL; |
| } |
| |
| |
| const char * |
| DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu, |
| std::string &storage) const |
| { |
| DWARFDebugInfoEntry::Attributes attributes; |
| GetAttributes(dwarf2Data, cu, NULL, attributes); |
| return GetQualifiedName (dwarf2Data, cu, attributes, storage); |
| } |
| |
| const char* |
| DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, |
| DWARFCompileUnit* cu, |
| const DWARFDebugInfoEntry::Attributes& attributes, |
| std::string &storage) const |
| { |
| |
| const char *name = GetName (dwarf2Data, cu); |
| |
| if (name) |
| { |
| const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); |
| storage.clear(); |
| // TODO: change this to get the correct decl context parent.... |
| while (parent_decl_ctx_die) |
| { |
| const dw_tag_t parent_tag = parent_decl_ctx_die->Tag(); |
| switch (parent_tag) |
| { |
| case DW_TAG_namespace: |
| { |
| const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); |
| if (namespace_name) |
| { |
| storage.insert (0, "::"); |
| storage.insert (0, namespace_name); |
| } |
| else |
| { |
| storage.insert (0, "(anonymous namespace)::"); |
| } |
| parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); |
| } |
| break; |
| |
| case DW_TAG_class_type: |
| case DW_TAG_structure_type: |
| case DW_TAG_union_type: |
| { |
| const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); |
| |
| if (class_union_struct_name) |
| { |
| storage.insert (0, "::"); |
| storage.insert (0, class_union_struct_name); |
| } |
| parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); |
| } |
| break; |
| |
| default: |
| parent_decl_ctx_die = NULL; |
| break; |
| } |
| } |
| |
| if (storage.empty()) |
| storage.append ("::"); |
| |
| storage.append (name); |
| } |
| if (storage.empty()) |
| return NULL; |
| return storage.c_str(); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // LookupAddress |
| //---------------------------------------------------------------------- |
| bool |
| DWARFDebugInfoEntry::LookupAddress |
| ( |
| const dw_addr_t address, |
| SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit* cu, |
| DWARFDebugInfoEntry** function_die, |
| DWARFDebugInfoEntry** block_die |
| ) |
| { |
| bool found_address = false; |
| if (m_tag) |
| { |
| bool check_children = false; |
| bool match_addr_range = false; |
| // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); |
| switch (m_tag) |
| { |
| case DW_TAG_array_type : break; |
| case DW_TAG_class_type : check_children = true; break; |
| case DW_TAG_entry_point : break; |
| case DW_TAG_enumeration_type : break; |
| case DW_TAG_formal_parameter : break; |
| case DW_TAG_imported_declaration : break; |
| case DW_TAG_label : break; |
| case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break; |
| case DW_TAG_member : break; |
| case DW_TAG_pointer_type : break; |
| case DW_TAG_reference_type : break; |
| case DW_TAG_compile_unit : match_addr_range = true; break; |
| case DW_TAG_string_type : break; |
| case DW_TAG_structure_type : check_children = true; break; |
| case DW_TAG_subroutine_type : break; |
| case DW_TAG_typedef : break; |
| case DW_TAG_union_type : break; |
| case DW_TAG_unspecified_parameters : break; |
| case DW_TAG_variant : break; |
| case DW_TAG_common_block : check_children = true; break; |
| case DW_TAG_common_inclusion : break; |
| case DW_TAG_inheritance : break; |
| case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break; |
| case DW_TAG_module : match_addr_range = true; break; |
| case DW_TAG_ptr_to_member_type : break; |
| case DW_TAG_set_type : break; |
| case DW_TAG_subrange_type : break; |
| case DW_TAG_with_stmt : break; |
| case DW_TAG_access_declaration : break; |
| case DW_TAG_base_type : break; |
| case DW_TAG_catch_block : match_addr_range = true; break; |
| case DW_TAG_const_type : break; |
| case DW_TAG_constant : break; |
| case DW_TAG_enumerator : break; |
| case DW_TAG_file_type : break; |
| case DW_TAG_friend : break; |
| case DW_TAG_namelist : break; |
| case DW_TAG_namelist_item : break; |
| case DW_TAG_packed_type : break; |
| case DW_TAG_subprogram : match_addr_range = true; break; |
| case DW_TAG_template_type_parameter : break; |
| case DW_TAG_template_value_parameter : break; |
| case DW_TAG_thrown_type : break; |
| case DW_TAG_try_block : match_addr_range = true; break; |
| case DW_TAG_variant_part : break; |
| case DW_TAG_variable : break; |
| case DW_TAG_volatile_type : break; |
| case DW_TAG_dwarf_procedure : break; |
| case DW_TAG_restrict_type : break; |
| case DW_TAG_interface_type : break; |
| case DW_TAG_namespace : check_children = true; break; |
| case DW_TAG_imported_module : break; |
| case DW_TAG_unspecified_type : break; |
| case DW_TAG_partial_unit : break; |
| case DW_TAG_imported_unit : break; |
| case DW_TAG_shared_type : break; |
| default: break; |
| } |
| |
| if (match_addr_range) |
| { |
| dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); |
| if (lo_pc != DW_INVALID_ADDRESS) |
| { |
| dw_addr_t hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); |
| if (hi_pc != DW_INVALID_ADDRESS) |
| { |
| // printf("\n0x%8.8x: %30s: address = 0x%8.8x [0x%8.8x - 0x%8.8x) ", m_offset, DW_TAG_value_to_name(tag), address, lo_pc, hi_pc); |
| if ((lo_pc <= address) && (address < hi_pc)) |
| { |
| found_address = true; |
| // puts("***MATCH***"); |
| switch (m_tag) |
| { |
| case DW_TAG_compile_unit: // File |
| check_children = ((function_die != NULL) || (block_die != NULL)); |
| break; |
| |
| case DW_TAG_subprogram: // Function |
| if (function_die) |
| *function_die = this; |
| check_children = (block_die != NULL); |
| break; |
| |
| case DW_TAG_inlined_subroutine: // Inlined Function |
| case DW_TAG_lexical_block: // Block { } in code |
| if (block_die) |
| { |
| *block_die = this; |
| check_children = true; |
| } |
| break; |
| |
| default: |
| check_children = true; |
| break; |
| } |
| } |
| } |
| else |
| { // compile units may not have a valid high/low pc when there |
| // are address gaps in subroutines so we must always search |
| // if there is no valid high and low PC |
| check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL)); |
| } |
| } |
| else |
| { |
| dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); |
| if (debug_ranges_offset != DW_INVALID_OFFSET) |
| { |
| DWARFDebugRanges::RangeList ranges; |
| DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); |
| debug_ranges->FindRanges(debug_ranges_offset, ranges); |
| // All DW_AT_ranges are relative to the base address of the |
| // compile unit. We add the compile unit base address to make |
| // sure all the addresses are properly fixed up. |
| ranges.Slide (cu->GetBaseAddress()); |
| if (ranges.FindEntryThatContains(address)) |
| { |
| found_address = true; |
| // puts("***MATCH***"); |
| switch (m_tag) |
| { |
| case DW_TAG_compile_unit: // File |
| check_children = ((function_die != NULL) || (block_die != NULL)); |
| break; |
| |
| case DW_TAG_subprogram: // Function |
| if (function_die) |
| *function_die = this; |
| check_children = (block_die != NULL); |
| break; |
| |
| case DW_TAG_inlined_subroutine: // Inlined Function |
| case DW_TAG_lexical_block: // Block { } in code |
| if (block_die) |
| { |
| *block_die = this; |
| check_children = true; |
| } |
| break; |
| |
| default: |
| check_children = true; |
| break; |
| } |
| } |
| else |
| { |
| check_children = false; |
| } |
| } |
| } |
| } |
| |
| |
| if (check_children) |
| { |
| // printf("checking children\n"); |
| DWARFDebugInfoEntry* child = GetFirstChild(); |
| while (child) |
| { |
| if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die)) |
| return true; |
| child = child->GetSibling(); |
| } |
| } |
| } |
| return found_address; |
| } |
| |
| const DWARFAbbreviationDeclaration* |
| DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data, |
| const DWARFCompileUnit *cu, |
| dw_offset_t &offset) const |
| { |
| offset = GetOffset(); |
| |
| const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx); |
| if (abbrev_decl) |
| { |
| // Make sure the abbreviation code still matches. If it doesn't and |
| // the DWARF data was mmap'ed, the backing file might have been modified |
| // which is bad news. |
| const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset); |
| |
| if (abbrev_decl->Code() == abbrev_code) |
| return abbrev_decl; |
| |
| // Only log if we are the one to figure out that the module was modified |
| // which is indicated by SetModified() returning false. |
| dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)", |
| GetOffset(), |
| (uint32_t)abbrev_decl->Code(), |
| (uint32_t)abbrev_code); |
| } |
| offset = DW_INVALID_OFFSET; |
| return NULL; |
| } |
| |
| |
| bool |
| DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) |
| { |
| return a.GetOffset() < b.GetOffset(); |
| } |
| |
| void |
| DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection) |
| { |
| DWARFDebugInfoEntry::const_iterator pos; |
| DWARFDebugInfoEntry::const_iterator end = die_collection.end(); |
| strm.PutCString("\noffset parent sibling child\n"); |
| strm.PutCString("-------- -------- -------- --------\n"); |
| for (pos = die_collection.begin(); pos != end; ++pos) |
| { |
| const DWARFDebugInfoEntry& die_ref = *pos; |
| const DWARFDebugInfoEntry* p = die_ref.GetParent(); |
| const DWARFDebugInfoEntry* s = die_ref.GetSibling(); |
| const DWARFDebugInfoEntry* c = die_ref.GetFirstChild(); |
| strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", |
| die_ref.GetOffset(), |
| p ? p->GetOffset() : 0, |
| s ? s->GetOffset() : 0, |
| c ? c->GetOffset() : 0, |
| die_ref.Tag(), |
| DW_TAG_value_to_name(die_ref.Tag()), |
| die_ref.HasChildren() ? " *" : ""); |
| } |
| } |
| |
| |
