SymbolFileDWARFDwo.cpp revision 314564 
1//===-- SymbolFileDWARFDwo.cpp ----------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "SymbolFileDWARFDwo.h"
11
12#include "lldb/Core/Section.h"
13#include "lldb/Expression/DWARFExpression.h"
14#include "lldb/Symbol/ObjectFile.h"
15#include "lldb/Utility/LLDBAssert.h"
16
17#include "DWARFCompileUnit.h"
18#include "DWARFDebugInfo.h"
19
20using namespace lldb;
21using namespace lldb_private;
22
23SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile,
24                                       DWARFCompileUnit *dwarf_cu)
25    : SymbolFileDWARF(objfile.get()), m_obj_file_sp(objfile),
26      m_base_dwarf_cu(dwarf_cu) {
27  SetID(((lldb::user_id_t)dwarf_cu->GetOffset()) << 32);
28}
29
30void SymbolFileDWARFDwo::LoadSectionData(lldb::SectionType sect_type,
31                                         DWARFDataExtractor &data) {
32  const SectionList *section_list =
33      m_obj_file->GetSectionList(false /* update_module_section_list */);
34  if (section_list) {
35    SectionSP section_sp(section_list->FindSectionByType(sect_type, true));
36    if (section_sp) {
37      // See if we memory mapped the DWARF segment?
38      if (m_dwarf_data.GetByteSize()) {
39        data.SetData(m_dwarf_data, section_sp->GetOffset(),
40                     section_sp->GetFileSize());
41        return;
42      }
43
44      if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0)
45        return;
46
47      data.Clear();
48    }
49  }
50
51  SymbolFileDWARF::LoadSectionData(sect_type, data);
52}
53
54lldb::CompUnitSP
55SymbolFileDWARFDwo::ParseCompileUnit(DWARFCompileUnit *dwarf_cu,
56                                     uint32_t cu_idx) {
57  assert(GetCompileUnit() == dwarf_cu && "SymbolFileDWARFDwo::ParseCompileUnit "
58                                         "called with incompatible compile "
59                                         "unit");
60  return GetBaseSymbolFile()->ParseCompileUnit(m_base_dwarf_cu, UINT32_MAX);
61}
62
63DWARFCompileUnit *SymbolFileDWARFDwo::GetCompileUnit() {
64  // Only dwo files with 1 compile unit is supported
65  if (GetNumCompileUnits() == 1)
66    return DebugInfo()->GetCompileUnitAtIndex(0);
67  else
68    return nullptr;
69}
70
71DWARFCompileUnit *
72SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
73  return GetCompileUnit();
74}
75
76SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
77  return GetBaseSymbolFile()->GetDIEToType();
78}
79
80SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
81  return GetBaseSymbolFile()->GetDIEToVariable();
82}
83
84SymbolFileDWARF::DIEToClangType &
85SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
86  return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
87}
88
89SymbolFileDWARF::ClangTypeToDIE &
90SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
91  return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
92}
93
94UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
95  return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
96}
97
98lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
99    const DWARFDeclContext &die_decl_ctx) {
100  return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(
101      die_decl_ctx);
102}
103
104SymbolFileDWARF *SymbolFileDWARFDwo::GetBaseSymbolFile() {
105  return m_base_dwarf_cu->GetSymbolFileDWARF();
106}
107
108DWARFExpression::LocationListFormat
109SymbolFileDWARFDwo::GetLocationListFormat() const {
110  return DWARFExpression::SplitDwarfLocationList;
111}
112
113TypeSystem *
114SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
115  return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
116}
117
118DWARFDIE
119SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
120  lldbassert(m_base_dwarf_cu->GetOffset() == die_ref.cu_offset);
121  return DebugInfo()->GetDIEForDIEOffset(die_ref.die_offset);
122}
123