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889 lines
28 KiB
889 lines
28 KiB
4 months ago
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//===-- DWARFDebugInfoEntry.cpp -------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFDebugInfoEntry.h"
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#include <assert.h>
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#include <algorithm>
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#include "llvm/Support/LEB128.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Expression/DWARFExpression.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Utility/Stream.h"
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#include "DWARFCompileUnit.h"
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#include "DWARFDebugAbbrev.h"
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#include "DWARFDebugAranges.h"
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#include "DWARFDebugInfo.h"
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#include "DWARFDebugRanges.h"
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#include "DWARFDeclContext.h"
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#include "DWARFFormValue.h"
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#include "DWARFUnit.h"
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#include "SymbolFileDWARF.h"
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#include "SymbolFileDWARFDwo.h"
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using namespace lldb_private;
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using namespace std;
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extern int g_verbose;
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// Extract a debug info entry for a given DWARFUnit from the data
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// starting at the offset in offset_ptr
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bool DWARFDebugInfoEntry::Extract(const DWARFDataExtractor &data,
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const DWARFUnit *cu,
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lldb::offset_t *offset_ptr) {
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m_offset = *offset_ptr;
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m_parent_idx = 0;
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m_sibling_idx = 0;
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const uint64_t abbr_idx = data.GetULEB128(offset_ptr);
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lldbassert(abbr_idx <= UINT16_MAX);
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m_abbr_idx = abbr_idx;
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// assert (fixed_form_sizes); // For best performance this should be
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// specified!
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if (m_abbr_idx) {
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lldb::offset_t offset = *offset_ptr;
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const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu);
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if (abbrevDecl == nullptr) {
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cu->GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
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"{0x%8.8x}: invalid abbreviation code %u, please file a bug and "
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"attach the file at the start of this error message",
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m_offset, (unsigned)abbr_idx);
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// WE can't parse anymore if the DWARF is borked...
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*offset_ptr = UINT32_MAX;
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return false;
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}
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m_tag = abbrevDecl->Tag();
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m_has_children = abbrevDecl->HasChildren();
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// Skip all data in the .debug_info or .debug_types for the attributes
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const uint32_t numAttributes = abbrevDecl->NumAttributes();
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uint32_t i;
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dw_form_t form;
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for (i = 0; i < numAttributes; ++i) {
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form = abbrevDecl->GetFormByIndexUnchecked(i);
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llvm::Optional<uint8_t> fixed_skip_size =
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DWARFFormValue::GetFixedSize(form, cu);
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if (fixed_skip_size)
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offset += *fixed_skip_size;
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else {
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bool form_is_indirect = false;
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do {
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form_is_indirect = false;
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uint32_t form_size = 0;
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switch (form) {
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// Blocks if inlined data that have a length field and the data bytes
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// inlined in the .debug_info/.debug_types
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case DW_FORM_exprloc:
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case DW_FORM_block:
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form_size = data.GetULEB128(&offset);
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break;
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case DW_FORM_block1:
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form_size = data.GetU8_unchecked(&offset);
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break;
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case DW_FORM_block2:
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form_size = data.GetU16_unchecked(&offset);
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break;
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case DW_FORM_block4:
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form_size = data.GetU32_unchecked(&offset);
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break;
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// Inlined NULL terminated C-strings
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case DW_FORM_string:
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data.GetCStr(&offset);
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break;
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// Compile unit address sized values
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case DW_FORM_addr:
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form_size = cu->GetAddressByteSize();
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break;
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case DW_FORM_ref_addr:
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if (cu->GetVersion() <= 2)
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form_size = cu->GetAddressByteSize();
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else
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form_size = 4;
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break;
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// 0 sized form
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case DW_FORM_flag_present:
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form_size = 0;
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break;
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// 1 byte values
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case DW_FORM_addrx1:
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case DW_FORM_data1:
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case DW_FORM_flag:
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case DW_FORM_ref1:
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case DW_FORM_strx1:
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form_size = 1;
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break;
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// 2 byte values
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case DW_FORM_addrx2:
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case DW_FORM_data2:
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case DW_FORM_ref2:
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case DW_FORM_strx2:
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form_size = 2;
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break;
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// 3 byte values
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case DW_FORM_addrx3:
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case DW_FORM_strx3:
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form_size = 3;
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break;
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// 4 byte values
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case DW_FORM_addrx4:
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case DW_FORM_data4:
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case DW_FORM_ref4:
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case DW_FORM_strx4:
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form_size = 4;
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break;
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// 8 byte values
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case DW_FORM_data8:
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case DW_FORM_ref8:
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case DW_FORM_ref_sig8:
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form_size = 8;
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break;
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// signed or unsigned LEB 128 values
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case DW_FORM_addrx:
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case DW_FORM_loclistx:
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case DW_FORM_rnglistx:
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case DW_FORM_sdata:
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case DW_FORM_udata:
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case DW_FORM_ref_udata:
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case DW_FORM_GNU_addr_index:
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case DW_FORM_GNU_str_index:
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case DW_FORM_strx:
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data.Skip_LEB128(&offset);
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break;
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case DW_FORM_indirect:
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form_is_indirect = true;
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form = data.GetULEB128(&offset);
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break;
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case DW_FORM_strp:
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case DW_FORM_sec_offset:
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data.GetU32(&offset);
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break;
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case DW_FORM_implicit_const:
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form_size = 0;
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break;
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default:
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*offset_ptr = m_offset;
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return false;
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}
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offset += form_size;
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} while (form_is_indirect);
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}
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}
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*offset_ptr = offset;
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return true;
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} else {
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m_tag = llvm::dwarf::DW_TAG_null;
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m_has_children = false;
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return true; // NULL debug tag entry
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}
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return false;
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}
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static DWARFRangeList GetRangesOrReportError(DWARFUnit &unit,
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const DWARFDebugInfoEntry &die,
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const DWARFFormValue &value) {
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llvm::Expected<DWARFRangeList> expected_ranges =
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(value.Form() == DW_FORM_rnglistx)
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? unit.FindRnglistFromIndex(value.Unsigned())
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: unit.FindRnglistFromOffset(value.Unsigned());
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if (expected_ranges)
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return std::move(*expected_ranges);
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unit.GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
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"{0x%8.8x}: DIE has DW_AT_ranges(0x%" PRIx64 ") attribute, but "
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"range extraction failed (%s), please file a bug "
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"and attach the file at the start of this error message",
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die.GetOffset(), value.Unsigned(),
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toString(expected_ranges.takeError()).c_str());
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return DWARFRangeList();
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}
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// GetDIENamesAndRanges
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//
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// Gets the valid address ranges for a given DIE by looking for a
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// DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges attributes.
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bool DWARFDebugInfoEntry::GetDIENamesAndRanges(
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DWARFUnit *cu, const char *&name, const char *&mangled,
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DWARFRangeList &ranges, int &decl_file, int &decl_line, int &decl_column,
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int &call_file, int &call_line, int &call_column,
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DWARFExpression *frame_base) const {
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dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
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dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
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std::vector<DWARFDIE> dies;
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bool set_frame_base_loclist_addr = false;
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const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu);
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SymbolFileDWARF &dwarf = cu->GetSymbolFileDWARF();
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lldb::ModuleSP module = dwarf.GetObjectFile()->GetModule();
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if (abbrevDecl) {
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const DWARFDataExtractor &data = cu->GetData();
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lldb::offset_t offset = GetFirstAttributeOffset();
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if (!data.ValidOffset(offset))
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return false;
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const uint32_t numAttributes = abbrevDecl->NumAttributes();
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bool do_offset = false;
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for (uint32_t i = 0; i < numAttributes; ++i) {
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DWARFFormValue form_value(cu);
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dw_attr_t attr;
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abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
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if (form_value.ExtractValue(data, &offset)) {
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switch (attr) {
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case DW_AT_low_pc:
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lo_pc = form_value.Address();
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if (do_offset)
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hi_pc += lo_pc;
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do_offset = false;
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break;
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case DW_AT_entry_pc:
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lo_pc = form_value.Address();
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break;
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case DW_AT_high_pc:
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if (form_value.Form() == DW_FORM_addr ||
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form_value.Form() == DW_FORM_addrx ||
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form_value.Form() == DW_FORM_GNU_addr_index) {
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hi_pc = form_value.Address();
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} else {
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hi_pc = form_value.Unsigned();
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if (lo_pc == LLDB_INVALID_ADDRESS)
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do_offset = hi_pc != LLDB_INVALID_ADDRESS;
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else
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hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save
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// on relocations
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}
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break;
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case DW_AT_ranges:
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ranges = GetRangesOrReportError(*cu, *this, form_value);
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break;
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case DW_AT_name:
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if (name == nullptr)
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name = form_value.AsCString();
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break;
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case DW_AT_MIPS_linkage_name:
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case DW_AT_linkage_name:
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if (mangled == nullptr)
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mangled = form_value.AsCString();
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break;
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case DW_AT_abstract_origin:
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dies.push_back(form_value.Reference());
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break;
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case DW_AT_specification:
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dies.push_back(form_value.Reference());
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break;
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case DW_AT_decl_file:
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if (decl_file == 0)
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decl_file = form_value.Unsigned();
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break;
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case DW_AT_decl_line:
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if (decl_line == 0)
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decl_line = form_value.Unsigned();
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break;
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case DW_AT_decl_column:
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if (decl_column == 0)
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decl_column = form_value.Unsigned();
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break;
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case DW_AT_call_file:
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if (call_file == 0)
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call_file = form_value.Unsigned();
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break;
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case DW_AT_call_line:
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if (call_line == 0)
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call_line = form_value.Unsigned();
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break;
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case DW_AT_call_column:
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if (call_column == 0)
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call_column = form_value.Unsigned();
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break;
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case DW_AT_frame_base:
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if (frame_base) {
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if (form_value.BlockData()) {
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uint32_t block_offset =
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form_value.BlockData() - data.GetDataStart();
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uint32_t block_length = form_value.Unsigned();
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*frame_base = DWARFExpression(
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module, DataExtractor(data, block_offset, block_length), cu);
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} else {
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DataExtractor data = cu->GetLocationData();
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const dw_offset_t offset = form_value.Unsigned();
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if (data.ValidOffset(offset)) {
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data = DataExtractor(data, offset, data.GetByteSize() - offset);
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*frame_base = DWARFExpression(module, data, cu);
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if (lo_pc != LLDB_INVALID_ADDRESS) {
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assert(lo_pc >= cu->GetBaseAddress());
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frame_base->SetLocationListAddresses(cu->GetBaseAddress(),
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lo_pc);
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} else {
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set_frame_base_loclist_addr = true;
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}
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}
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}
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}
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break;
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default:
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break;
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}
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}
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}
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}
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if (ranges.IsEmpty()) {
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if (lo_pc != LLDB_INVALID_ADDRESS) {
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if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc)
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ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc));
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else
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ranges.Append(DWARFRangeList::Entry(lo_pc, 0));
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}
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}
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if (set_frame_base_loclist_addr) {
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dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0);
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assert(lowest_range_pc >= cu->GetBaseAddress());
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frame_base->SetLocationListAddresses(cu->GetBaseAddress(), lowest_range_pc);
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}
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if (ranges.IsEmpty() || name == nullptr || mangled == nullptr) {
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for (const DWARFDIE &die : dies) {
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if (die) {
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die.GetDIE()->GetDIENamesAndRanges(die.GetCU(), name, mangled, ranges,
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decl_file, decl_line, decl_column,
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call_file, call_line, call_column);
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}
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}
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}
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return !ranges.IsEmpty();
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}
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// Get all attribute values for a given DIE, including following any
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// specification or abstract origin attributes and including those in the
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// results. Any duplicate attributes will have the first instance take
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// precedence (this can happen for declaration attributes).
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size_t DWARFDebugInfoEntry::GetAttributes(DWARFUnit *cu,
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DWARFAttributes &attributes,
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Recurse recurse,
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uint32_t curr_depth) const {
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const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu);
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if (abbrevDecl) {
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const DWARFDataExtractor &data = cu->GetData();
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lldb::offset_t offset = GetFirstAttributeOffset();
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const uint32_t num_attributes = abbrevDecl->NumAttributes();
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for (uint32_t i = 0; i < num_attributes; ++i) {
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DWARFFormValue form_value(cu);
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dw_attr_t attr;
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abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value);
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const dw_form_t form = form_value.Form();
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// If we are tracking down DW_AT_specification or DW_AT_abstract_origin
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// attributes, the depth will be non-zero. We need to omit certain
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// attributes that don't make sense.
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switch (attr) {
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case DW_AT_sibling:
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case DW_AT_declaration:
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if (curr_depth > 0) {
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// This attribute doesn't make sense when combined with the DIE that
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// references this DIE. We know a DIE is referencing this DIE because
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// curr_depth is not zero
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break;
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|
}
|
||
|
LLVM_FALLTHROUGH;
|
||
|
default:
|
||
|
attributes.Append(cu, offset, attr, form);
|
||
|
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 {
|
||
|
llvm::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);
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
attributes.Clear();
|
||
|
}
|
||
|
return attributes.Size();
|
||
|
}
|
||
|
|
||
|
// 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)) {
|
||
|
uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr);
|
||
|
|
||
|
if (attr_idx != DW_INVALID_INDEX) {
|
||
|
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;
|
||
|
}
|
||
|
|
||
|
// 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;
|
||
|
}
|
||
|
|
||
|
size_t DWARFDebugInfoEntry::GetAttributeAddressRanges(
|
||
|
DWARFUnit *cu, DWARFRangeList &ranges, bool check_hi_lo_pc,
|
||
|
bool check_specification_or_abstract_origin) const {
|
||
|
ranges.Clear();
|
||
|
|
||
|
DWARFFormValue form_value;
|
||
|
if (GetAttributeValue(cu, DW_AT_ranges, form_value)) {
|
||
|
ranges = GetRangesOrReportError(*cu, *this, form_value);
|
||
|
} else 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.GetSize();
|
||
|
}
|
||
|
|
||
|
// 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(
|
||
|
const DWARFUnit *cu, DWARFDebugAranges *debug_aranges) const {
|
||
|
if (m_tag) {
|
||
|
if (m_tag == DW_TAG_subprogram) {
|
||
|
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)) {
|
||
|
debug_aranges->AppendRange(GetOffset(), lo_pc, hi_pc);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
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, attributes, 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();
|
||
|
}
|
||
|
|
||
|
const char *DWARFDebugInfoEntry::GetQualifiedName(DWARFUnit *cu,
|
||
|
std::string &storage) const {
|
||
|
DWARFAttributes attributes;
|
||
|
GetAttributes(cu, attributes, Recurse::yes);
|
||
|
return GetQualifiedName(cu, attributes, storage);
|
||
|
}
|
||
|
|
||
|
const char *
|
||
|
DWARFDebugInfoEntry::GetQualifiedName(DWARFUnit *cu,
|
||
|
const DWARFAttributes &attributes,
|
||
|
std::string &storage) const {
|
||
|
|
||
|
const char *name = GetName(cu);
|
||
|
|
||
|
if (name) {
|
||
|
DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(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();
|
||
|
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();
|
||
|
} 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();
|
||
|
|
||
|
if (class_union_struct_name) {
|
||
|
storage.insert(0, "::");
|
||
|
storage.insert(0, class_union_struct_name);
|
||
|
}
|
||
|
parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE();
|
||
|
} break;
|
||
|
|
||
|
default:
|
||
|
parent_decl_ctx_die.Clear();
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (storage.empty())
|
||
|
storage.append("::");
|
||
|
|
||
|
storage.append(name);
|
||
|
}
|
||
|
if (storage.empty())
|
||
|
return nullptr;
|
||
|
return storage.c_str();
|
||
|
}
|
||
|
|
||
|
lldb::offset_t DWARFDebugInfoEntry::GetFirstAttributeOffset() const {
|
||
|
return GetOffset() + llvm::getULEB128Size(m_abbr_idx);
|
||
|
}
|
||
|
|
||
|
const DWARFAbbreviationDeclaration *
|
||
|
DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr(const DWARFUnit *cu) const {
|
||
|
if (cu) {
|
||
|
const DWARFAbbreviationDeclarationSet *abbrev_set = cu->GetAbbreviations();
|
||
|
if (abbrev_set)
|
||
|
return abbrev_set->GetAbbreviationDeclaration(m_abbr_idx);
|
||
|
}
|
||
|
return nullptr;
|
||
|
}
|
||
|
|
||
|
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);
|
||
|
}
|