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[LLDB] - Improved DWARF5 support.

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This patch improves the support of DWARF5.
Particularly the reporting of source code locations.

Differential revision: https://reviews.llvm.org/D51935

llvm-svn: 342153
This commit is contained in:
George Rimar
2018-09-13 17:06:47 +00:00
parent f353ae1848
commit c6c7bfc4d2
18 changed files with 393 additions and 81 deletions
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31
lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
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@@ -34,8 +34,18 @@ DWARFUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
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);
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);
@@ -65,6 +75,23 @@ void DWARFCompileUnit::Dump(Stream *s) const {
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();