//===-- 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 #include #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::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; dw_uleb128_t abbrCode = debug_info_data.GetULEB128 (offset_ptr); assert (fixed_form_sizes); // For best performance this should be specified! if (abbrCode) { uint32_t offset = *offset_ptr; m_abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); // Skip all data in the .debug_info for the attributes const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); register uint32_t i; register dw_form_t form; for (i=0; iGetFormByIndexUnchecked(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_abbrevDecl = NULL; 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; dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); if (abbrCode) { m_abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); if (m_abbrevDecl) { dw_tag_t tag = m_abbrevDecl->Tag(); bool isCompileUnitTag = 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 = m_abbrevDecl->NumAttributes(); uint32_t i; dw_attr_t attr; dw_form_t form; for (i=0; iGetAttrAndFormByIndexUnchecked(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_abbrevDecl = NULL; *offset_ptr = offset; return true; // NULL debug tag entry } } return false; } //---------------------------------------------------------------------- // AppendDependentDIES() //---------------------------------------------------------------------- bool DWARFDebugInfoEntry::AppendDependentDIES ( SymbolFileDWARF* dwarf2Data, const DWARFCompileUnit* cu, const bool add_children, DWARFDIECollection& dependent_dies ) const { // Add this object's DIE offset // The line below is the only place that should add a die to the // dependent_dies collection as we have to be careful of recursion! if ( !dependent_dies.Insert(this) ) return false; // This DIE already exists in the collection, nothing to do! //DEBUG_PRINTF(" dependent_dies.Insert(0x%8.8x)\n", GetOffset());/// if (m_abbrevDecl) { // Keep adding parent DIE offsets as long as the offsets do not // already exist in the collection const DWARFDebugInfoEntry* die = GetParent(); while ( die && die->AppendDependentDIES(dwarf2Data, cu, false, dependent_dies) ) die = die->GetParent(); bool add_non_subprogram_children = false; bool add_children_override = false; if (!add_children) { switch (m_abbrevDecl->Tag()) { case DW_TAG_array_type: break; case DW_TAG_class_type: add_non_subprogram_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: add_children_override = true; break; case DW_TAG_member: break; case DW_TAG_pointer_type: break; case DW_TAG_reference_type: break; case DW_TAG_compile_unit: break; case DW_TAG_string_type: break; case DW_TAG_structure_type: add_non_subprogram_children = true; break; case DW_TAG_subroutine_type: add_children_override = true; break; case DW_TAG_typedef: break; case DW_TAG_union_type: add_non_subprogram_children = true; break; case DW_TAG_unspecified_parameters: break; case DW_TAG_variant: break; case DW_TAG_common_block: break; case DW_TAG_common_inclusion: break; case DW_TAG_inheritance: break; case DW_TAG_inlined_subroutine: break; case DW_TAG_module: 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: 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: add_children_override = 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: 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: 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; } } const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); // Dump all data in the .debug_info for the attributes const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); uint32_t i; dw_offset_t offset = GetOffset(); debug_info_data.Skip_LEB128(&offset); // Skip abbreviation code dw_attr_t attr; dw_form_t form; for (i=0; iGetAttrAndFormByIndexUnchecked(i, attr, form); DWARFFormValue form_value(form); switch (attr) { // All cases that use refer to another DIE should use this case // without // having to check the FORM of the attribute to tell if it refers to another // DIE case DW_AT_abstract_origin: case DW_AT_import: case DW_AT_discr: case DW_AT_containing_type: case DW_AT_base_types: case DW_AT_friend: case DW_AT_specification: case DW_AT_type: case DW_AT_common_reference: case DW_AT_default_value: { form_value.ExtractValue(debug_info_data, &offset, cu); DWARFCompileUnitSP cu_sp_ptr; const DWARFDebugInfoEntry* ref_die = const_cast(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); if (ref_die) ref_die->AppendDependentDIES(dwarf2Data, cu_sp_ptr.get(), true, dependent_dies); } break; default: if (attr != DW_AT_sibling) { switch (form_value.Form()) { case DW_FORM_ref_addr: case DW_FORM_ref1: case DW_FORM_ref2: case DW_FORM_ref4: case DW_FORM_ref8: case DW_FORM_ref_udata: // Log::WarningVerbose("DWARFDebugInfoEntry::AppendDependentDIES() -- check on this item %s: attr = %s form = %s", // DW_TAG_value_to_name(m_abbrevDecl->Tag()), // DW_AT_value_to_name(attr), // DW_FORM_value_to_name(form)); break; } } form_value.SkipValue(debug_info_data, &offset, cu); break; } } if (m_abbrevDecl->HasChildren()) { const DWARFDebugInfoEntry* child; for (child = GetFirstChild(); child != NULL; child = child->GetSibling()) { bool add = add_children || add_children_override; if (!add) { if (add_non_subprogram_children) { // add_non_subprogram_children is used for classes and structs // that may contain children that are the member variables that // may have functions as children and whom may add the class or // struct by adding their parent. We don't want to add any // functions though since they may have been optimized out. But // we do need to watch for declarations and keep them. if (child->Tag() == DW_TAG_subprogram) { // Check if this subprogram TAG had a DW_AT_declaration attribute set to 1. // If so we need to include this DIE so that we always have a complete view // of a class definition so debuggers can track down any weak symbols that // may not have had weak definition entries. if (child->GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_declaration, 0) == 1) add = true; } else { // Add all other items inside a class/struct add = true; } } else { // We don't need to add this child, only add it if it's a NULL tag add = child->IsNULL(); } } if (add) child->AppendDependentDIES(dwarf2Data, cu, true, dependent_dies); } } } return true; } //---------------------------------------------------------------------- // 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 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 die_offsets; bool set_frame_base_loclist_addr = false; if (m_abbrevDecl) { const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); uint32_t offset = m_offset; if (!debug_info_data.ValidOffset(offset)) return false; // Skip the abbreviation code debug_info_data.Skip_LEB128(&offset); const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); uint32_t i; dw_attr_t attr; dw_form_t form; for (i=0; iGetAttrAndFormByIndexUnchecked(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.AddOffset(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; } } } } size_t numRanges = ranges.Size(); if (numRanges == 0) { if (lo_pc != DW_INVALID_ADDRESS) { if (hi_pc != DW_INVALID_ADDRESS) ranges.AddRange(lo_pc, hi_pc); else ranges.AddRange(lo_pc, lo_pc); } } if (set_frame_base_loclist_addr) { assert (ranges.LowestAddress(0) >= cu->GetBaseAddress()); frame_base->SetLocationListSlide(ranges.LowestAddress(0) - cu->GetBaseAddress()); } if (ranges.Size() == 0 || (name == NULL) || (mangled == NULL)) { std::vector::const_iterator pos; std::vector::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.Size() > 0; } //---------------------------------------------------------------------- // 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) { if (m_abbrevDecl) { s.PutCString(DW_TAG_value_to_name(m_abbrevDecl->Tag())); s.Printf( " [%u] %c\n", abbrCode, m_abbrevDecl->HasChildren() ? '*':' '); // Dump all data in the .debug_info for the attributes const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); uint32_t i; dw_attr_t attr; dw_form_t form; for (i=0; iGetAttrAndFormByIndexUnchecked(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 ("CU: %s OBJFILE: %s DIE: %s (0x%x).", cu_name ? cu_name : "", obj_file_name ? obj_file_name : "", die_name ? die_name : "", GetOffset()); } //---------------------------------------------------------------------- // 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 { if (m_abbrevDecl) { if (fixed_form_sizes == NULL) fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize()); uint32_t offset = GetOffset(); const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); // Skip the abbreviation code so we are at the data for the attributes debug_info_data.Skip_LEB128(&offset); const uint32_t num_attributes = m_abbrevDecl->NumAttributes(); uint32_t i; dw_attr_t attr; dw_form_t form; DWARFFormValue form_value; for (i=0; iGetAttrAndFormByIndexUnchecked (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(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(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 { if (m_abbrevDecl) { uint32_t attr_idx = m_abbrevDecl->FindAttributeIndex(attr); if (attr_idx != DW_INVALID_INDEX) { uint32_t offset = GetOffset(); const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); // Skip the abbreviation code so we are at the data for the attributes debug_info_data.Skip_LEB128(&offset); uint32_t idx=0; while (idxGetFormByIndex(idx++), debug_info_data, &offset, cu); const dw_offset_t attr_offset = offset; form_value.SetForm(m_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(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(); 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_abbrevDecl) { dw_tag_t tag = m_abbrevDecl->Tag(); if (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_abbrevDecl) { dw_tag_t tag = m_abbrevDecl->Tag(); if (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(); } } } //---------------------------------------------------------------------- // 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_abbrevDecl) { bool check_children = false; bool match_addr_range = false; dw_tag_t tag = m_abbrevDecl->Tag(); // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); switch (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 (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 = (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.AddOffset(cu->GetBaseAddress()); if (ranges.Lookup(address)) { found_address = true; // puts("***MATCH***"); switch (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; } bool DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) { return a.GetOffset() < b.GetOffset(); }