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
67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
//===-- DIERef.cpp ----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DIERef.h"
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#include "DWARFUnit.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(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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DWARFUnit *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 DWARFUnit *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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