1 //===-- DIERef.cpp ----------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 #include "DWARFCompileUnit.h"
12 #include "DWARFDebugInfo.h"
13 #include "DWARFFormValue.h"
14 #include "SymbolFileDWARF.h"
15 #include "SymbolFileDWARFDebugMap.h"
18 : cu_offset(DW_INVALID_OFFSET), die_offset(DW_INVALID_OFFSET) {}
20 DIERef::DIERef(dw_offset_t c, dw_offset_t d) : cu_offset(c), die_offset(d) {}
22 DIERef::DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf)
23 : cu_offset(DW_INVALID_OFFSET), die_offset(uid & 0xffffffff) {
24 SymbolFileDWARFDebugMap *debug_map = dwarf->GetDebugMapSymfile();
26 const uint32_t oso_idx = debug_map->GetOSOIndexFromUserID(uid);
27 SymbolFileDWARF *actual_dwarf = debug_map->GetSymbolFileByOSOIndex(oso_idx);
29 DWARFDebugInfo *debug_info = actual_dwarf->DebugInfo();
31 DWARFCompileUnit *dwarf_cu =
32 debug_info->GetCompileUnitContainingDIEOffset(die_offset);
34 cu_offset = dwarf_cu->GetOffset();
39 die_offset = DW_INVALID_OFFSET;
41 cu_offset = uid >> 32;
45 DIERef::DIERef(const DWARFFormValue &form_value)
46 : cu_offset(DW_INVALID_OFFSET), die_offset(DW_INVALID_OFFSET) {
47 if (form_value.IsValid()) {
48 const DWARFCompileUnit *dwarf_cu = form_value.GetCompileUnit();
50 if (dwarf_cu->GetBaseObjOffset() != DW_INVALID_OFFSET)
51 cu_offset = dwarf_cu->GetBaseObjOffset();
53 cu_offset = dwarf_cu->GetOffset();
55 die_offset = form_value.Reference();
59 lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf) const {
60 //----------------------------------------------------------------------
61 // Each SymbolFileDWARF will set its ID to what is expected.
63 // SymbolFileDWARF, when used for DWARF with .o files on MacOSX, has the
64 // ID set to the compile unit index.
66 // SymbolFileDWARFDwo sets the ID to the compile unit offset.
67 //----------------------------------------------------------------------
68 if (dwarf && die_offset != DW_INVALID_OFFSET)
69 return dwarf->GetID() | die_offset;
71 return LLDB_INVALID_UID;