| //===-- DWARFCompileUnit.cpp ------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #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); |
| 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()); |
| } |
| |
| |
| const lldb_private::DWARFDataExtractor &DWARFCompileUnit::GetData() const { |
| return m_dwarf->get_debug_info_data(); |
| } |