| //===-- DWARFDebugInfoEntry.cpp -------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFDebugInfoEntry.h" |
| |
| #include <cassert> |
| |
| #include <algorithm> |
| #include <limits> |
| #include <optional> |
| |
| #include "llvm/Support/LEB128.h" |
| |
| #include "lldb/Core/Module.h" |
| #include "lldb/Expression/DWARFExpression.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Utility/Stream.h" |
| #include "lldb/Utility/StreamString.h" |
| |
| #include "DWARFCompileUnit.h" |
| #include "DWARFDebugAranges.h" |
| #include "DWARFDebugInfo.h" |
| #include "DWARFDebugRanges.h" |
| #include "DWARFDeclContext.h" |
| #include "DWARFFormValue.h" |
| #include "DWARFUnit.h" |
| #include "SymbolFileDWARF.h" |
| #include "SymbolFileDWARFDwo.h" |
| |
| #include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h" |
| |
| using namespace lldb_private; |
| using namespace lldb_private::dwarf; |
| using namespace lldb_private::plugin::dwarf; |
| extern int g_verbose; |
| |
| // Extract a debug info entry for a given DWARFUnit from the data |
| // starting at the offset in offset_ptr |
| bool DWARFDebugInfoEntry::Extract(const DWARFDataExtractor &data, |
| const DWARFUnit &unit, |
| lldb::offset_t *offset_ptr) { |
| m_offset = *offset_ptr; |
| auto report_error = [&](const char *fmt, const auto &...vals) { |
| unit.GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( |
| "[{0:x16}]: {1}, please file a bug and " |
| "attach the file at the start of this error message", |
| static_cast<uint64_t>(m_offset), llvm::formatv(fmt, vals...)); |
| *offset_ptr = std::numeric_limits<lldb::offset_t>::max(); |
| return false; |
| }; |
| |
| m_parent_idx = 0; |
| m_sibling_idx = 0; |
| const uint64_t abbr_idx = data.GetULEB128(offset_ptr); |
| if (abbr_idx > std::numeric_limits<uint16_t>::max()) |
| return report_error("abbreviation code {0} too big", abbr_idx); |
| m_abbr_idx = abbr_idx; |
| |
| if (m_abbr_idx == 0) { |
| m_tag = llvm::dwarf::DW_TAG_null; |
| m_has_children = false; |
| return true; // NULL debug tag entry |
| } |
| |
| const auto *abbrevDecl = GetAbbreviationDeclarationPtr(&unit); |
| if (abbrevDecl == nullptr) |
| return report_error("invalid abbreviation code {0}", abbr_idx); |
| |
| m_tag = abbrevDecl->getTag(); |
| m_has_children = abbrevDecl->hasChildren(); |
| // Skip all data in the .debug_info or .debug_types for the attributes |
| for (const auto &attribute : abbrevDecl->attributes()) { |
| if (DWARFFormValue::SkipValue(attribute.Form, data, offset_ptr, &unit)) |
| continue; |
| |
| return report_error("Unsupported DW_FORM_{1:x}", attribute.Form); |
| } |
| return true; |
| } |
| |
| static DWARFRangeList GetRangesOrReportError(DWARFUnit &unit, |
| const DWARFDebugInfoEntry &die, |
| const DWARFFormValue &value) { |
| llvm::Expected<DWARFRangeList> expected_ranges = |
| (value.Form() == DW_FORM_rnglistx) |
| ? unit.FindRnglistFromIndex(value.Unsigned()) |
| : unit.FindRnglistFromOffset(value.Unsigned()); |
| if (expected_ranges) |
| return std::move(*expected_ranges); |
| |
| unit.GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( |
| "[{0:x16}]: DIE has DW_AT_ranges({1} {2:x16}) attribute, but " |
| "range extraction failed ({3}), please file a bug " |
| "and attach the file at the start of this error message", |
| die.GetOffset(), |
| llvm::dwarf::FormEncodingString(value.Form()).str().c_str(), |
| value.Unsigned(), toString(expected_ranges.takeError()).c_str()); |
| return DWARFRangeList(); |
| } |
| |
| static void ExtractAttrAndFormValue( |
| const llvm::DWARFAbbreviationDeclaration::AttributeSpec &attr_spec, |
| dw_attr_t &attr, DWARFFormValue &form_value) { |
| attr = attr_spec.Attr; |
| form_value.FormRef() = attr_spec.Form; |
| if (attr_spec.isImplicitConst()) |
| form_value.SetSigned(attr_spec.getImplicitConstValue()); |
| } |
| |
| // 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( |
| DWARFUnit *cu, const char *&name, const char *&mangled, |
| DWARFRangeList &ranges, std::optional<int> &decl_file, |
| std::optional<int> &decl_line, std::optional<int> &decl_column, |
| std::optional<int> &call_file, std::optional<int> &call_line, |
| std::optional<int> &call_column, DWARFExpressionList *frame_base) const { |
| dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; |
| dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; |
| std::vector<DWARFDIE> dies; |
| bool set_frame_base_loclist_addr = false; |
| |
| SymbolFileDWARF &dwarf = cu->GetSymbolFileDWARF(); |
| lldb::ModuleSP module = dwarf.GetObjectFile()->GetModule(); |
| |
| if (const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu)) { |
| const DWARFDataExtractor &data = cu->GetData(); |
| lldb::offset_t offset = GetFirstAttributeOffset(); |
| |
| if (!data.ValidOffset(offset)) |
| return false; |
| |
| bool do_offset = false; |
| |
| for (const auto &attribute : abbrevDecl->attributes()) { |
| DWARFFormValue form_value(cu); |
| dw_attr_t attr; |
| ExtractAttrAndFormValue(attribute, attr, form_value); |
| |
| if (form_value.ExtractValue(data, &offset)) { |
| switch (attr) { |
| case DW_AT_low_pc: |
| lo_pc = form_value.Address(); |
| |
| if (do_offset) |
| hi_pc += lo_pc; |
| do_offset = false; |
| break; |
| |
| case DW_AT_entry_pc: |
| lo_pc = form_value.Address(); |
| break; |
| |
| case DW_AT_high_pc: |
| if (form_value.Form() == DW_FORM_addr || |
| form_value.Form() == DW_FORM_addrx || |
| form_value.Form() == DW_FORM_GNU_addr_index) { |
| hi_pc = form_value.Address(); |
| } else { |
| hi_pc = form_value.Unsigned(); |
| if (lo_pc == LLDB_INVALID_ADDRESS) |
| do_offset = hi_pc != LLDB_INVALID_ADDRESS; |
| else |
| hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save |
| // on relocations |
| } |
| break; |
| |
| case DW_AT_ranges: |
| ranges = GetRangesOrReportError(*cu, *this, form_value); |
| break; |
| |
| case DW_AT_name: |
| if (name == nullptr) |
| name = form_value.AsCString(); |
| break; |
| |
| case DW_AT_MIPS_linkage_name: |
| case DW_AT_linkage_name: |
| if (mangled == nullptr) |
| mangled = form_value.AsCString(); |
| break; |
| |
| case DW_AT_abstract_origin: |
| dies.push_back(form_value.Reference()); |
| break; |
| |
| case DW_AT_specification: |
| dies.push_back(form_value.Reference()); |
| break; |
| |
| case DW_AT_decl_file: |
| if (!decl_file) |
| decl_file = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_decl_line: |
| if (!decl_line) |
| decl_line = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_decl_column: |
| if (!decl_column) |
| decl_column = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_file: |
| if (!call_file) |
| call_file = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_line: |
| if (!call_line) |
| call_line = form_value.Unsigned(); |
| break; |
| |
| case DW_AT_call_column: |
| if (!call_column) |
| 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() - data.GetDataStart(); |
| uint32_t block_length = form_value.Unsigned(); |
| *frame_base = |
| DWARFExpressionList(module, |
| DWARFExpression(DataExtractor( |
| data, block_offset, block_length)), |
| cu); |
| } else { |
| DataExtractor data = cu->GetLocationData(); |
| const dw_offset_t offset = form_value.Unsigned(); |
| if (data.ValidOffset(offset)) { |
| data = DataExtractor(data, offset, data.GetByteSize() - offset); |
| if (lo_pc != LLDB_INVALID_ADDRESS) { |
| assert(lo_pc >= cu->GetBaseAddress()); |
| DWARFExpression::ParseDWARFLocationList(cu, data, frame_base); |
| frame_base->SetFuncFileAddress(lo_pc); |
| } else |
| set_frame_base_loclist_addr = true; |
| } |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| } |
| |
| if (ranges.IsEmpty()) { |
| if (lo_pc != LLDB_INVALID_ADDRESS) { |
| if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) |
| ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); |
| else |
| ranges.Append(DWARFRangeList::Entry(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->SetFuncFileAddress(lowest_range_pc); |
| } |
| |
| if (ranges.IsEmpty() || name == nullptr || mangled == nullptr) { |
| for (const DWARFDIE &die : dies) { |
| if (die) { |
| die.GetDIE()->GetDIENamesAndRanges(die.GetCU(), name, mangled, ranges, |
| decl_file, decl_line, decl_column, |
| call_file, call_line, call_column); |
| } |
| } |
| } |
| return !ranges.IsEmpty(); |
| } |
| |
| // 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). |
| void DWARFDebugInfoEntry::GetAttributes(DWARFUnit *cu, |
| DWARFAttributes &attributes, |
| Recurse recurse, |
| uint32_t curr_depth) const { |
| const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu); |
| if (!abbrevDecl) { |
| attributes.Clear(); |
| return; |
| } |
| |
| const DWARFDataExtractor &data = cu->GetData(); |
| lldb::offset_t offset = GetFirstAttributeOffset(); |
| |
| for (const auto &attribute : abbrevDecl->attributes()) { |
| DWARFFormValue form_value(cu); |
| dw_attr_t attr; |
| ExtractAttrAndFormValue(attribute, attr, form_value); |
| |
| // 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; |
| } |
| [[fallthrough]]; |
| default: |
| attributes.Append(form_value, offset, attr); |
| break; |
| } |
| |
| if (recurse == Recurse::yes && |
| ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin))) { |
| if (form_value.ExtractValue(data, &offset)) { |
| DWARFDIE spec_die = form_value.Reference(); |
| if (spec_die) |
| spec_die.GetDIE()->GetAttributes(spec_die.GetCU(), attributes, |
| recurse, curr_depth + 1); |
| } |
| } else { |
| const dw_form_t form = form_value.Form(); |
| std::optional<uint8_t> fixed_skip_size = |
| DWARFFormValue::GetFixedSize(form, cu); |
| if (fixed_skip_size) |
| offset += *fixed_skip_size; |
| else |
| DWARFFormValue::SkipValue(form, data, &offset, cu); |
| } |
| } |
| } |
| |
| // GetAttributeValue |
| // |
| // Get the value of an attribute and return the .debug_info or .debug_types |
| // 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( |
| const DWARFUnit *cu, const dw_attr_t attr, DWARFFormValue &form_value, |
| dw_offset_t *end_attr_offset_ptr, |
| bool check_specification_or_abstract_origin) const { |
| if (const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu)) { |
| std::optional<uint32_t> attr_idx = abbrevDecl->findAttributeIndex(attr); |
| |
| if (attr_idx) { |
| const DWARFDataExtractor &data = cu->GetData(); |
| lldb::offset_t offset = GetFirstAttributeOffset(); |
| |
| uint32_t idx = 0; |
| while (idx < *attr_idx) |
| DWARFFormValue::SkipValue(abbrevDecl->getFormByIndex(idx++), data, |
| &offset, cu); |
| |
| const dw_offset_t attr_offset = offset; |
| form_value.SetUnit(cu); |
| form_value.SetForm(abbrevDecl->getFormByIndex(idx)); |
| if (form_value.ExtractValue(data, &offset)) { |
| if (end_attr_offset_ptr) |
| *end_attr_offset_ptr = offset; |
| return attr_offset; |
| } |
| } |
| } |
| |
| if (check_specification_or_abstract_origin) { |
| if (GetAttributeValue(cu, DW_AT_specification, form_value)) { |
| DWARFDIE die = form_value.Reference(); |
| if (die) { |
| dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( |
| die.GetCU(), attr, form_value, end_attr_offset_ptr, false); |
| if (die_offset) |
| return die_offset; |
| } |
| } |
| |
| if (GetAttributeValue(cu, DW_AT_abstract_origin, form_value)) { |
| DWARFDIE die = form_value.Reference(); |
| if (die) { |
| dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( |
| die.GetCU(), attr, form_value, end_attr_offset_ptr, false); |
| if (die_offset) |
| return die_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( |
| const DWARFUnit *cu, const dw_attr_t attr, const char *fail_value, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, attr, form_value, nullptr, |
| check_specification_or_abstract_origin)) |
| return form_value.AsCString(); |
| return fail_value; |
| } |
| |
| // GetAttributeValueAsUnsigned |
| // |
| // Get the value of an attribute as unsigned and return it. |
| uint64_t DWARFDebugInfoEntry::GetAttributeValueAsUnsigned( |
| const DWARFUnit *cu, const dw_attr_t attr, uint64_t fail_value, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, attr, form_value, nullptr, |
| check_specification_or_abstract_origin)) |
| return form_value.Unsigned(); |
| return fail_value; |
| } |
| |
| std::optional<uint64_t> |
| DWARFDebugInfoEntry::GetAttributeValueAsOptionalUnsigned( |
| const DWARFUnit *cu, const dw_attr_t attr, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, attr, form_value, nullptr, |
| check_specification_or_abstract_origin)) |
| return form_value.Unsigned(); |
| return std::nullopt; |
| } |
| |
| // GetAttributeValueAsReference |
| // |
| // Get the value of an attribute as reference and fix up and compile unit |
| // relative offsets as needed. |
| DWARFDIE DWARFDebugInfoEntry::GetAttributeValueAsReference( |
| const DWARFUnit *cu, const dw_attr_t attr, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, attr, form_value, nullptr, |
| check_specification_or_abstract_origin)) |
| return form_value.Reference(); |
| return {}; |
| } |
| |
| uint64_t DWARFDebugInfoEntry::GetAttributeValueAsAddress( |
| const DWARFUnit *cu, const dw_attr_t attr, uint64_t fail_value, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, attr, form_value, nullptr, |
| check_specification_or_abstract_origin)) |
| return form_value.Address(); |
| return fail_value; |
| } |
| |
| // GetAttributeHighPC |
| // |
| // Get the hi_pc, adding hi_pc to lo_pc when specified as an <offset-from-low- |
| // pc>. |
| // |
| // Returns the hi_pc or fail_value. |
| dw_addr_t DWARFDebugInfoEntry::GetAttributeHighPC( |
| const DWARFUnit *cu, dw_addr_t lo_pc, uint64_t fail_value, |
| bool check_specification_or_abstract_origin) const { |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, DW_AT_high_pc, form_value, nullptr, |
| check_specification_or_abstract_origin)) { |
| dw_form_t form = form_value.Form(); |
| if (form == DW_FORM_addr || form == DW_FORM_addrx || |
| form == DW_FORM_GNU_addr_index) |
| return form_value.Address(); |
| |
| // DWARF4 can specify the hi_pc as an <offset-from-lowpc> |
| return lo_pc + form_value.Unsigned(); |
| } |
| return fail_value; |
| } |
| |
| // GetAttributeAddressRange |
| // |
| // Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified as an <offset- |
| // from-low-pc>. |
| // |
| // Returns true or sets lo_pc and hi_pc to fail_value. |
| bool DWARFDebugInfoEntry::GetAttributeAddressRange( |
| const DWARFUnit *cu, dw_addr_t &lo_pc, dw_addr_t &hi_pc, |
| uint64_t fail_value, bool check_specification_or_abstract_origin) const { |
| lo_pc = GetAttributeValueAsAddress(cu, DW_AT_low_pc, fail_value, |
| check_specification_or_abstract_origin); |
| if (lo_pc != fail_value) { |
| hi_pc = GetAttributeHighPC(cu, lo_pc, fail_value, |
| check_specification_or_abstract_origin); |
| if (hi_pc != fail_value) |
| return true; |
| } |
| lo_pc = fail_value; |
| hi_pc = fail_value; |
| return false; |
| } |
| |
| DWARFRangeList DWARFDebugInfoEntry::GetAttributeAddressRanges( |
| DWARFUnit *cu, bool check_hi_lo_pc, |
| bool check_specification_or_abstract_origin) const { |
| |
| DWARFFormValue form_value; |
| if (GetAttributeValue(cu, DW_AT_ranges, form_value)) |
| return GetRangesOrReportError(*cu, *this, form_value); |
| |
| DWARFRangeList ranges; |
| if (check_hi_lo_pc) { |
| dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; |
| dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; |
| if (GetAttributeAddressRange(cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS, |
| check_specification_or_abstract_origin)) { |
| if (lo_pc < hi_pc) |
| ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); |
| } |
| } |
| return ranges; |
| } |
| |
| // GetName |
| // |
| // Get value of the DW_AT_name attribute and return it if one exists, else |
| // return NULL. |
| const char *DWARFDebugInfoEntry::GetName(const DWARFUnit *cu) const { |
| return GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); |
| } |
| |
| // 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(const DWARFUnit *cu, |
| bool substitute_name_allowed) const { |
| const char *name = nullptr; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_MIPS_linkage_name, nullptr, true); |
| if (name) |
| return name; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_linkage_name, nullptr, true); |
| if (name) |
| return name; |
| |
| if (!substitute_name_allowed) |
| return nullptr; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); |
| 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(const DWARFUnit *cu) const { |
| const char *name = nullptr; |
| if (!cu) |
| return name; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_MIPS_linkage_name, nullptr, true); |
| if (name) |
| return name; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_linkage_name, nullptr, true); |
| if (name) |
| return name; |
| |
| name = GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); |
| return name; |
| } |
| |
| /// This function is builds a table very similar to the standard .debug_aranges |
| /// table, except that the actual DIE offset for the function is placed in the |
| /// table instead of the compile unit offset. |
| void DWARFDebugInfoEntry::BuildFunctionAddressRangeTable( |
| DWARFUnit *cu, DWARFDebugAranges *debug_aranges) const { |
| if (m_tag) { |
| if (m_tag == DW_TAG_subprogram) { |
| DWARFRangeList ranges = |
| GetAttributeAddressRanges(cu, /*check_hi_lo_pc=*/true); |
| for (const auto &r : ranges) { |
| debug_aranges->AppendRange(GetOffset(), r.GetRangeBase(), |
| r.GetRangeEnd()); |
| } |
| } |
| |
| const DWARFDebugInfoEntry *child = GetFirstChild(); |
| while (child) { |
| child->BuildFunctionAddressRangeTable(cu, debug_aranges); |
| child = child->GetSibling(); |
| } |
| } |
| } |
| |
| DWARFDeclContext |
| DWARFDebugInfoEntry::GetDWARFDeclContextStatic(const DWARFDebugInfoEntry *die, |
| DWARFUnit *cu) { |
| DWARFDeclContext dwarf_decl_ctx; |
| for (;;) { |
| const dw_tag_t tag = die->Tag(); |
| if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) |
| return dwarf_decl_ctx; |
| dwarf_decl_ctx.AppendDeclContext(tag, die->GetName(cu)); |
| DWARFDIE parent_decl_ctx_die = die->GetParentDeclContextDIE(cu); |
| if (!parent_decl_ctx_die || parent_decl_ctx_die.GetDIE() == die) |
| return dwarf_decl_ctx; |
| if (parent_decl_ctx_die.Tag() == DW_TAG_compile_unit || |
| parent_decl_ctx_die.Tag() == DW_TAG_partial_unit) |
| return dwarf_decl_ctx; |
| die = parent_decl_ctx_die.GetDIE(); |
| cu = parent_decl_ctx_die.GetCU(); |
| } |
| } |
| |
| DWARFDeclContext DWARFDebugInfoEntry::GetDWARFDeclContext(DWARFUnit *cu) const { |
| return GetDWARFDeclContextStatic(this, cu); |
| } |
| |
| DWARFDIE |
| DWARFDebugInfoEntry::GetParentDeclContextDIE(DWARFUnit *cu) const { |
| DWARFAttributes attributes = GetAttributes(cu, Recurse::yes); |
| return GetParentDeclContextDIE(cu, attributes); |
| } |
| |
| DWARFDIE |
| DWARFDebugInfoEntry::GetParentDeclContextDIE( |
| DWARFUnit *cu, const DWARFAttributes &attributes) const { |
| DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this)); |
| |
| while (die) { |
| // 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.GetDIE() != this) { |
| switch (die.Tag()) { |
| case DW_TAG_compile_unit: |
| case DW_TAG_partial_unit: |
| case DW_TAG_namespace: |
| case DW_TAG_structure_type: |
| case DW_TAG_union_type: |
| case DW_TAG_class_type: |
| return die; |
| |
| default: |
| break; |
| } |
| } |
| |
| DWARFDIE spec_die = attributes.FormValueAsReference(DW_AT_specification); |
| if (spec_die) { |
| DWARFDIE decl_ctx_die = spec_die.GetParentDeclContextDIE(); |
| if (decl_ctx_die) |
| return decl_ctx_die; |
| } |
| |
| DWARFDIE abs_die = attributes.FormValueAsReference(DW_AT_abstract_origin); |
| if (abs_die) { |
| DWARFDIE decl_ctx_die = abs_die.GetParentDeclContextDIE(); |
| if (decl_ctx_die) |
| return decl_ctx_die; |
| } |
| |
| die = die.GetParent(); |
| } |
| return DWARFDIE(); |
| } |
| |
| lldb::offset_t DWARFDebugInfoEntry::GetFirstAttributeOffset() const { |
| return GetOffset() + llvm::getULEB128Size(m_abbr_idx); |
| } |
| |
| const llvm::DWARFAbbreviationDeclaration * |
| DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr(const DWARFUnit *cu) const { |
| if (!cu) |
| return nullptr; |
| |
| const llvm::DWARFAbbreviationDeclarationSet *abbrev_set = |
| cu->GetAbbreviations(); |
| if (!abbrev_set) |
| return nullptr; |
| |
| return abbrev_set->getAbbreviationDeclaration(m_abbr_idx); |
| } |
| |
| bool DWARFDebugInfoEntry::IsGlobalOrStaticScopeVariable() const { |
| if (Tag() != DW_TAG_variable) |
| return false; |
| const DWARFDebugInfoEntry *parent_die = GetParent(); |
| while (parent_die != nullptr) { |
| switch (parent_die->Tag()) { |
| case DW_TAG_subprogram: |
| case DW_TAG_lexical_block: |
| case DW_TAG_inlined_subroutine: |
| return false; |
| |
| case DW_TAG_compile_unit: |
| case DW_TAG_partial_unit: |
| return true; |
| |
| default: |
| break; |
| } |
| parent_die = parent_die->GetParent(); |
| } |
| return false; |
| } |
| |
| bool DWARFDebugInfoEntry::operator==(const DWARFDebugInfoEntry &rhs) const { |
| return m_offset == rhs.m_offset && m_parent_idx == rhs.m_parent_idx && |
| m_sibling_idx == rhs.m_sibling_idx && |
| m_abbr_idx == rhs.m_abbr_idx && m_has_children == rhs.m_has_children && |
| m_tag == rhs.m_tag; |
| } |
| |
| bool DWARFDebugInfoEntry::operator!=(const DWARFDebugInfoEntry &rhs) const { |
| return !(*this == rhs); |
| } |
