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//===-- DIERef.cpp ----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DIERef.h"
#include "DWARFUnit.h"
#include "DWARFDebugInfo.h"
#include "DWARFFormValue.h"
#include "SymbolFileDWARF.h"
#include "SymbolFileDWARFDebugMap.h"
DIERef::DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf)
: cu_offset(DW_INVALID_OFFSET), die_offset(uid & 0xffffffff) {
SymbolFileDWARFDebugMap *debug_map = dwarf->GetDebugMapSymfile();
if (debug_map) {
const uint32_t oso_idx = debug_map->GetOSOIndexFromUserID(uid);
SymbolFileDWARF *actual_dwarf = debug_map->GetSymbolFileByOSOIndex(oso_idx);
if (actual_dwarf) {
DWARFDebugInfo *debug_info = actual_dwarf->DebugInfo();
if (debug_info) {
DWARFUnit *dwarf_cu =
debug_info->GetCompileUnitContainingDIEOffset(die_offset);
if (dwarf_cu) {
cu_offset = dwarf_cu->GetOffset();
return;
}
}
}
die_offset = DW_INVALID_OFFSET;
} else {
cu_offset = uid >> 32;
}
}
DIERef::DIERef(const DWARFFormValue &form_value)
: cu_offset(DW_INVALID_OFFSET), die_offset(DW_INVALID_OFFSET) {
if (form_value.IsValid()) {
const DWARFUnit *dwarf_cu = form_value.GetCompileUnit();
if (dwarf_cu) {
if (dwarf_cu->GetBaseObjOffset() != DW_INVALID_OFFSET)
cu_offset = dwarf_cu->GetBaseObjOffset();
else
cu_offset = dwarf_cu->GetOffset();
}
die_offset = form_value.Reference();
}
}
lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf) const {
//----------------------------------------------------------------------
// Each SymbolFileDWARF will set its ID to what is expected.
//
// SymbolFileDWARF, when used for DWARF with .o files on MacOSX, has the
// ID set to the compile unit index.
//
// SymbolFileDWARFDwo sets the ID to the compile unit offset.
//----------------------------------------------------------------------
if (dwarf && die_offset != DW_INVALID_OFFSET)
return dwarf->GetID() | die_offset;
else
return LLDB_INVALID_UID;
}
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