SymbolFileDWARFDwo.cpp revision 309124 
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, DWARFCompileUnit* dwarf_cu) :
24    SymbolFileDWARF(objfile.get()),
25    m_obj_file_sp(objfile),
26    m_base_dwarf_cu(dwarf_cu)
27{
28    SetID(((lldb::user_id_t)dwarf_cu->GetOffset())<<32);
29}
30
31void
32SymbolFileDWARFDwo::LoadSectionData (lldb::SectionType sect_type, DWARFDataExtractor& data)
33{
34    const SectionList* section_list = m_obj_file->GetSectionList(false /* update_module_section_list */);
35    if (section_list)
36    {
37        SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
38        if (section_sp)
39        {
40            // See if we memory mapped the DWARF segment?
41            if (m_dwarf_data.GetByteSize())
42            {
43                data.SetData(m_dwarf_data, section_sp->GetOffset(), section_sp->GetFileSize());
44                return;
45            }
46
47            if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0)
48                return;
49
50            data.Clear();
51        }
52    }
53
54    SymbolFileDWARF::LoadSectionData(sect_type, data);
55}
56
57lldb::CompUnitSP
58SymbolFileDWARFDwo::ParseCompileUnit(DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
59{
60    assert(GetCompileUnit() == dwarf_cu && "SymbolFileDWARFDwo::ParseCompileUnit called with incompatible compile unit");
61    return GetBaseSymbolFile()->ParseCompileUnit(m_base_dwarf_cu, UINT32_MAX);
62}
63
64DWARFCompileUnit*
65SymbolFileDWARFDwo::GetCompileUnit()
66{
67    // Only dwo files with 1 compile unit is supported
68    if (GetNumCompileUnits() == 1)
69        return DebugInfo()->GetCompileUnitAtIndex(0);
70    else
71        return nullptr;
72}
73
74DWARFCompileUnit*
75SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
76{
77    return GetCompileUnit();
78}
79
80SymbolFileDWARF::DIEToTypePtr&
81SymbolFileDWARFDwo::GetDIEToType()
82{
83    return GetBaseSymbolFile()->GetDIEToType();
84}
85
86SymbolFileDWARF::DIEToVariableSP&
87SymbolFileDWARFDwo::GetDIEToVariable()
88{
89    return GetBaseSymbolFile()->GetDIEToVariable();
90}
91
92SymbolFileDWARF::DIEToClangType&
93SymbolFileDWARFDwo::GetForwardDeclDieToClangType()
94{
95    return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
96}
97
98SymbolFileDWARF::ClangTypeToDIE&
99SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie()
100{
101    return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
102}
103
104UniqueDWARFASTTypeMap&
105SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap()
106{
107    return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
108}
109
110lldb::TypeSP
111SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &die_decl_ctx)
112{
113    return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
114}
115
116SymbolFileDWARF*
117SymbolFileDWARFDwo::GetBaseSymbolFile()
118{
119    return m_base_dwarf_cu->GetSymbolFileDWARF();
120}
121
122DWARFExpression::LocationListFormat
123SymbolFileDWARFDwo::GetLocationListFormat() const
124{
125    return DWARFExpression::SplitDwarfLocationList;
126}
127
128TypeSystem*
129SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language)
130{
131    return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
132}
133
134DWARFDIE
135SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref)
136{
137    lldbassert(m_base_dwarf_cu->GetOffset() == die_ref.cu_offset);
138    return DebugInfo()->GetDIEForDIEOffset(die_ref.die_offset);
139}
140