SymbolFileDWARFDwo.cpp revision 293127 
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
16#include "DWARFCompileUnit.h"
17#include "DWARFDebugInfo.h"
18
19using namespace lldb;
20using namespace lldb_private;
21
22SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile, DWARFCompileUnit* dwarf_cu) :
23    SymbolFileDWARF(objfile.get()),
24    m_obj_file_sp(objfile),
25    m_base_dwarf_cu(dwarf_cu)
26{
27    SetID(((lldb::user_id_t)dwarf_cu->GetOffset())<<32);
28}
29
30void
31SymbolFileDWARFDwo::LoadSectionData (lldb::SectionType sect_type, DWARFDataExtractor& data)
32{
33    const SectionList* section_list = m_obj_file->GetSectionList(false /* update_module_section_list */);
34    if (section_list)
35    {
36        SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
37        if (section_sp)
38        {
39            // See if we memory mapped the DWARF segment?
40            if (m_dwarf_data.GetByteSize())
41            {
42                data.SetData(m_dwarf_data, section_sp->GetOffset(), section_sp->GetFileSize());
43                return;
44            }
45
46            if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0)
47                return;
48
49            data.Clear();
50        }
51    }
52
53    SymbolFileDWARF::LoadSectionData(sect_type, data);
54}
55
56lldb::CompUnitSP
57SymbolFileDWARFDwo::ParseCompileUnit(DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
58{
59    assert(GetCompileUnit() == dwarf_cu && "SymbolFileDWARFDwo::ParseCompileUnit called with incompatible compile unit");
60    return GetBaseSymbolFile()->ParseCompileUnit(m_base_dwarf_cu, UINT32_MAX);
61}
62
63DWARFCompileUnit*
64SymbolFileDWARFDwo::GetCompileUnit()
65{
66    // Only dwo files with 1 compile unit is supported
67    if (GetNumCompileUnits() == 1)
68        return DebugInfo()->GetCompileUnitAtIndex(0);
69    else
70        return nullptr;
71}
72
73DWARFCompileUnit*
74SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
75{
76    return GetCompileUnit();
77}
78
79SymbolFileDWARF::DIEToTypePtr&
80SymbolFileDWARFDwo::GetDIEToType()
81{
82    return GetBaseSymbolFile()->GetDIEToType();
83}
84
85SymbolFileDWARF::DIEToVariableSP&
86SymbolFileDWARFDwo::GetDIEToVariable()
87{
88    return GetBaseSymbolFile()->GetDIEToVariable();
89}
90
91SymbolFileDWARF::DIEToClangType&
92SymbolFileDWARFDwo::GetForwardDeclDieToClangType()
93{
94    return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
95}
96
97SymbolFileDWARF::ClangTypeToDIE&
98SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie()
99{
100    return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
101}
102
103UniqueDWARFASTTypeMap&
104SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap()
105{
106    return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
107}
108
109lldb::TypeSP
110SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &die_decl_ctx)
111{
112    return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
113}
114
115SymbolFileDWARF*
116SymbolFileDWARFDwo::GetBaseSymbolFile()
117{
118    return m_base_dwarf_cu->GetSymbolFileDWARF();
119}
120
121DWARFExpression::LocationListFormat
122SymbolFileDWARFDwo::GetLocationListFormat() const
123{
124    return DWARFExpression::SplitDwarfLocationList;
125}
126
127TypeSystem*
128SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language)
129{
130    return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
131}
132