2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
//===-- DWARFCompileUnit.cpp ------------------------------------*- C++ -*-===//
|
|
//
|
|
// 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 "DWARFCompileUnit.h"
|
|
|
|
#include "SymbolFileDWARF.h"
|
|
#include "lldb/Utility/Stream.h"
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
|
|
extern int g_verbose;
|
|
|
|
DWARFCompileUnit::DWARFCompileUnit(SymbolFileDWARF *dwarf2Data)
|
|
: DWARFUnit(dwarf2Data) {}
|
|
|
|
DWARFUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
|
|
const DWARFDataExtractor &debug_info,
|
|
lldb::offset_t *offset_ptr) {
|
|
// std::make_shared would require the ctor to be public.
|
|
std::shared_ptr<DWARFCompileUnit> cu_sp(new DWARFCompileUnit(dwarf2Data));
|
|
|
|
cu_sp->m_offset = *offset_ptr;
|
|
|
|
if (debug_info.ValidOffset(*offset_ptr)) {
|
|
dw_offset_t abbr_offset;
|
|
const DWARFDebugAbbrev *abbr = dwarf2Data->DebugAbbrev();
|
|
cu_sp->m_length = debug_info.GetDWARFInitialLength(offset_ptr);
|
|
cu_sp->m_is_dwarf64 = debug_info.IsDWARF64();
|
|
cu_sp->m_version = debug_info.GetU16(offset_ptr);
|
|
|
|
if (cu_sp->m_version == 5) {
|
|
cu_sp->m_unit_type = debug_info.GetU8(offset_ptr);
|
|
cu_sp->m_addr_size = debug_info.GetU8(offset_ptr);
|
|
abbr_offset = debug_info.GetDWARFOffset(offset_ptr);
|
|
|
|
if (cu_sp->m_unit_type == llvm::dwarf::DW_UT_skeleton)
|
|
cu_sp->m_dwo_id = debug_info.GetU64(offset_ptr);
|
|
} else {
|
|
abbr_offset = debug_info.GetDWARFOffset(offset_ptr);
|
|
cu_sp->m_addr_size = debug_info.GetU8(offset_ptr);
|
|
}
|
|
|
|
bool length_OK =
|
|
debug_info.ValidOffset(cu_sp->GetNextCompileUnitOffset() - 1);
|
|
bool version_OK = SymbolFileDWARF::SupportedVersion(cu_sp->m_version);
|
|
bool abbr_offset_OK =
|
|
dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset);
|
|
bool addr_size_OK = (cu_sp->m_addr_size == 4) || (cu_sp->m_addr_size == 8);
|
|
|
|
if (length_OK && version_OK && addr_size_OK && abbr_offset_OK &&
|
|
abbr != NULL) {
|
|
cu_sp->m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset);
|
|
return cu_sp;
|
|
}
|
|
|
|
// reset the offset to where we tried to parse from if anything went wrong
|
|
*offset_ptr = cu_sp->m_offset;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void DWARFCompileUnit::Dump(Stream *s) const {
|
|
s->Printf("0x%8.8x: Compile Unit: length = 0x%8.8x, version = 0x%4.4x, "
|
|
"abbr_offset = 0x%8.8x, addr_size = 0x%2.2x (next CU at "
|
|
"{0x%8.8x})\n",
|
|
m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size,
|
|
GetNextCompileUnitOffset());
|
|
}
|
|
|
|
uint32_t DWARFCompileUnit::GetHeaderByteSize() const {
|
|
if (m_version < 5)
|
|
return m_is_dwarf64 ? 23 : 11;
|
|
|
|
switch (m_unit_type) {
|
|
case llvm::dwarf::DW_UT_compile:
|
|
case llvm::dwarf::DW_UT_partial:
|
|
return 12;
|
|
case llvm::dwarf::DW_UT_skeleton:
|
|
case llvm::dwarf::DW_UT_split_compile:
|
|
return 20;
|
|
case llvm::dwarf::DW_UT_type:
|
|
case llvm::dwarf::DW_UT_split_type:
|
|
return 24;
|
|
}
|
|
llvm_unreachable("invalid UnitType.");
|
|
}
|
|
|
|
const lldb_private::DWARFDataExtractor &DWARFCompileUnit::GetData() const {
|
|
return m_dwarf->get_debug_info_data();
|
|
}
|