4f39b294aa
I have found LLDB commonly looks up lldb::user_id_t 0xffffffff failing to find
its DIE. One would rather expect LLDB_INVALID_UID == 0xffffffffffffffff in such
case.
DWARFASTParserClang.cpp:495
492 type_sp.reset(
493 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL,
494 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type,
495 &decl, clang_type, resolve_state));
encoding_uid = (DWARFFormValue) {m_cu = 0x0, m_form = 0, m_value = {value = {uval = 0, sval = 0, cstr = 0x0}, data = 0x0}}
-> DIERef::DIERef(const DWARFFormValue &form_value = {m_cu = 0x0, m_form = 0, m_value = {value = {uval = 0, sval = 0, cstr = 0x0}, data = 0x0}})
-> (DIERef) {cu_offset = 0xffffffff, die_offset = 0xffffffff}
-> lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf = 0x61d00000b480) const
-> Type::Type(lldb::user_id_t encoding_uid = 0xffffffff)
But 0xffffffff !=
#define LLDB_INVALID_UID UINT64_MAX
Differential revision: https://reviews.llvm.org/D37492
llvm-svn: 319580
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
//===-- DIERef.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 "DIERef.h"
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#include "DWARFCompileUnit.h"
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#include "DWARFDebugInfo.h"
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#include "DWARFFormValue.h"
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#include "SymbolFileDWARF.h"
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#include "SymbolFileDWARFDebugMap.h"
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DIERef::DIERef()
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: cu_offset(DW_INVALID_OFFSET), die_offset(DW_INVALID_OFFSET) {}
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DIERef::DIERef(dw_offset_t c, dw_offset_t d) : cu_offset(c), die_offset(d) {}
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DIERef::DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf)
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: cu_offset(DW_INVALID_OFFSET), die_offset(uid & 0xffffffff) {
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SymbolFileDWARFDebugMap *debug_map = dwarf->GetDebugMapSymfile();
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if (debug_map) {
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const uint32_t oso_idx = debug_map->GetOSOIndexFromUserID(uid);
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SymbolFileDWARF *actual_dwarf = debug_map->GetSymbolFileByOSOIndex(oso_idx);
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if (actual_dwarf) {
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DWARFDebugInfo *debug_info = actual_dwarf->DebugInfo();
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if (debug_info) {
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DWARFCompileUnit *dwarf_cu =
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debug_info->GetCompileUnitContainingDIEOffset(die_offset);
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if (dwarf_cu) {
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cu_offset = dwarf_cu->GetOffset();
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return;
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}
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}
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}
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die_offset = DW_INVALID_OFFSET;
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} else {
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cu_offset = uid >> 32;
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}
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}
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DIERef::DIERef(const DWARFFormValue &form_value)
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: cu_offset(DW_INVALID_OFFSET), die_offset(DW_INVALID_OFFSET) {
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if (form_value.IsValid()) {
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const DWARFCompileUnit *dwarf_cu = form_value.GetCompileUnit();
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if (dwarf_cu) {
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if (dwarf_cu->GetBaseObjOffset() != DW_INVALID_OFFSET)
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cu_offset = dwarf_cu->GetBaseObjOffset();
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else
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cu_offset = dwarf_cu->GetOffset();
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}
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die_offset = form_value.Reference();
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}
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}
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lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf) const {
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//----------------------------------------------------------------------
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// Each SymbolFileDWARF will set its ID to what is expected.
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//
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// SymbolFileDWARF, when used for DWARF with .o files on MacOSX, has the
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// ID set to the compile unit index.
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//
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// SymbolFileDWARFDwo sets the ID to the compile unit offset.
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//----------------------------------------------------------------------
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if (dwarf && die_offset != DW_INVALID_OFFSET)
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return dwarf->GetID() | die_offset;
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else
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return LLDB_INVALID_UID;
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}
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