d950892cf0
This patch by Greg Clayton drops the virtualization for DWARFPartialUnit. The virtualization of DWARFUnit now matches more its LLVM counterpart. DWZ patchset is going to be implementable without DWARFPartialUnit remapping. https://reviews.llvm.org/D40474 This reverts commit 329423. This reapplies commit r329305. llvm-svn: 330084
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
//===-- DWARFCompileUnit.cpp ------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFCompileUnit.h"
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#include "SymbolFileDWARF.h"
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using namespace lldb;
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using namespace lldb_private;
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extern int g_verbose;
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DWARFCompileUnit::DWARFCompileUnit(SymbolFileDWARF *dwarf2Data)
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: DWARFUnit(dwarf2Data) {}
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DWARFUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
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lldb::offset_t *offset_ptr) {
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// std::make_shared would require the ctor to be public.
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std::shared_ptr<DWARFCompileUnit> cu_sp(new DWARFCompileUnit(dwarf2Data));
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// Out of memory?
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if (cu_sp.get() == NULL)
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return nullptr;
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const DWARFDataExtractor &debug_info = dwarf2Data->get_debug_info_data();
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cu_sp->m_offset = *offset_ptr;
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if (debug_info.ValidOffset(*offset_ptr)) {
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dw_offset_t abbr_offset;
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const DWARFDebugAbbrev *abbr = dwarf2Data->DebugAbbrev();
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cu_sp->m_length = debug_info.GetDWARFInitialLength(offset_ptr);
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cu_sp->m_is_dwarf64 = debug_info.IsDWARF64();
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cu_sp->m_version = debug_info.GetU16(offset_ptr);
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abbr_offset = debug_info.GetDWARFOffset(offset_ptr);
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cu_sp->m_addr_size = debug_info.GetU8(offset_ptr);
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bool length_OK =
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debug_info.ValidOffset(cu_sp->GetNextCompileUnitOffset() - 1);
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bool version_OK = SymbolFileDWARF::SupportedVersion(cu_sp->m_version);
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bool abbr_offset_OK =
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dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset);
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bool addr_size_OK = (cu_sp->m_addr_size == 4) || (cu_sp->m_addr_size == 8);
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if (length_OK && version_OK && addr_size_OK && abbr_offset_OK &&
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abbr != NULL) {
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cu_sp->m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset);
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return cu_sp;
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}
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// reset the offset to where we tried to parse from if anything went wrong
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*offset_ptr = cu_sp->m_offset;
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}
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return nullptr;
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}
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void DWARFCompileUnit::Dump(Stream *s) const {
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s->Printf("0x%8.8x: Compile Unit: length = 0x%8.8x, version = 0x%4.4x, "
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"abbr_offset = 0x%8.8x, addr_size = 0x%2.2x (next CU at "
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"{0x%8.8x})\n",
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m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size,
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GetNextCompileUnitOffset());
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}
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