source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp

//===-- SymbolFileDWARFDwo.cpp ----------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "SymbolFileDWARFDwo.h"

#include "lldb/Core/Section.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Symbol/ObjectFile.h"

#include "DWARFCompileUnit.h"
#include "DWARFDebugInfo.h"

using namespace lldb;
using namespace lldb_private;

SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile, DWARFCompileUnit* dwarf_cu) :
    SymbolFileDWARF(objfile.get()),
    m_obj_file_sp(objfile),
    m_base_dwarf_cu(dwarf_cu)
{
    SetID(((lldb::user_id_t)dwarf_cu->GetOffset())<<32);
}

void
SymbolFileDWARFDwo::LoadSectionData (lldb::SectionType sect_type, DWARFDataExtractor& data)
{
    const SectionList* section_list = m_obj_file->GetSectionList(false /* update_module_section_list */);
    if (section_list)
    {
        SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
        if (section_sp)
        {
            // See if we memory mapped the DWARF segment?
            if (m_dwarf_data.GetByteSize())
            {
                data.SetData(m_dwarf_data, section_sp->GetOffset(), section_sp->GetFileSize());
                return;
            }

            if (m_obj_file->ReadSectionData(section_sp.get(), data) != 0)
                return;

            data.Clear();
        }
    }

    SymbolFileDWARF::LoadSectionData(sect_type, data);
}

lldb::CompUnitSP
SymbolFileDWARFDwo::ParseCompileUnit(DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
{
    assert(GetCompileUnit() == dwarf_cu && "SymbolFileDWARFDwo::ParseCompileUnit called with incompatible compile unit");
    return GetBaseSymbolFile()->ParseCompileUnit(m_base_dwarf_cu, UINT32_MAX);
}

DWARFCompileUnit*
SymbolFileDWARFDwo::GetCompileUnit()
{
    // Only dwo files with 1 compile unit is supported
    if (GetNumCompileUnits() == 1)
        return DebugInfo()->GetCompileUnitAtIndex(0);
    else
        return nullptr;
}

DWARFCompileUnit*
SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
{
    return GetCompileUnit();
}

SymbolFileDWARF::DIEToTypePtr&
SymbolFileDWARFDwo::GetDIEToType()
{
    return GetBaseSymbolFile()->GetDIEToType();
}

SymbolFileDWARF::DIEToVariableSP&
SymbolFileDWARFDwo::GetDIEToVariable()
{
    return GetBaseSymbolFile()->GetDIEToVariable();
}

SymbolFileDWARF::DIEToClangType&
SymbolFileDWARFDwo::GetForwardDeclDieToClangType()
{
    return GetBaseSymbolFile()->GetForwardDeclDieToClangType();
}

SymbolFileDWARF::ClangTypeToDIE&
SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie()
{
    return GetBaseSymbolFile()->GetForwardDeclClangTypeToDie();
}

UniqueDWARFASTTypeMap&
SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap()
{
    return GetBaseSymbolFile()->GetUniqueDWARFASTTypeMap();
}

lldb::TypeSP
SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &die_decl_ctx)
{
    return GetBaseSymbolFile()->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
}

SymbolFileDWARF*
SymbolFileDWARFDwo::GetBaseSymbolFile()
{
    return m_base_dwarf_cu->GetSymbolFileDWARF();
}

DWARFExpression::LocationListFormat
SymbolFileDWARFDwo::GetLocationListFormat() const
{
    return DWARFExpression::SplitDwarfLocationList;
}

TypeSystem*
SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language)
{
    return GetBaseSymbolFile()->GetTypeSystemForLanguage(language);
}