6a2eb36710
Previously it was storing a *pointer*, which left open the possibility of this pointer being null. We never made use of that possibility (it does not make sense), and most of the code was already assuming that. However, there were a couple of null-checks scattered around the code. This patch replaces the reference with a pointer, making the non-null-ness explicit, and removes the remaining null-checks. llvm-svn: 363381
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
//===-- DWARFDebugInfo.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef SymbolFileDWARF_DWARFDebugInfo_h_
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#define SymbolFileDWARF_DWARFDebugInfo_h_
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#include <map>
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#include <vector>
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#include "DWARFDIE.h"
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#include "DWARFTypeUnit.h"
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#include "DWARFUnit.h"
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#include "SymbolFileDWARF.h"
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#include "lldb/Core/STLUtils.h"
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#include "lldb/lldb-private.h"
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#include "llvm/Support/Error.h"
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namespace lldb_private {
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class DWARFContext;
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}
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typedef std::multimap<const char *, dw_offset_t, CStringCompareFunctionObject>
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CStringToDIEMap;
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typedef CStringToDIEMap::iterator CStringToDIEMapIter;
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typedef CStringToDIEMap::const_iterator CStringToDIEMapConstIter;
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class DWARFDebugInfo {
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public:
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typedef dw_offset_t (*Callback)(SymbolFileDWARF *dwarf2Data,
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DWARFUnit *cu,
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DWARFDebugInfoEntry *die,
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const dw_offset_t next_offset,
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const uint32_t depth, void *userData);
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explicit DWARFDebugInfo(SymbolFileDWARF &dwarf,
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lldb_private::DWARFContext &context);
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size_t GetNumUnits();
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DWARFUnit *GetUnitAtIndex(lldb::user_id_t idx);
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DWARFUnit *GetUnitAtOffset(DIERef::Section section, dw_offset_t cu_offset,
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uint32_t *idx_ptr = nullptr);
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DWARFUnit *GetUnitContainingDIEOffset(DIERef::Section section,
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dw_offset_t die_offset);
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DWARFUnit *GetUnit(const DIERef &die_ref);
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DWARFTypeUnit *GetTypeUnitForHash(uint64_t hash);
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bool ContainsTypeUnits();
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DWARFDIE GetDIEForDIEOffset(DIERef::Section section,
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dw_offset_t die_offset);
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DWARFDIE GetDIE(const DIERef &die_ref);
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enum {
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eDumpFlag_Verbose = (1 << 0), // Verbose dumping
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eDumpFlag_ShowForm = (1 << 1), // Show the DW_form type
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eDumpFlag_ShowAncestors =
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(1 << 2) // Show all parent DIEs when dumping single DIEs
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};
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llvm::Expected<DWARFDebugAranges &> GetCompileUnitAranges();
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protected:
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typedef std::vector<DWARFUnitSP> UnitColl;
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SymbolFileDWARF &m_dwarf;
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lldb_private::DWARFContext &m_context;
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UnitColl m_units;
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std::unique_ptr<DWARFDebugAranges>
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m_cu_aranges_up; // A quick address to compile unit table
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std::vector<std::pair<uint64_t, uint32_t>> m_type_hash_to_unit_index;
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private:
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// All parsing needs to be done partially any managed by this class as
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// accessors are called.
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void ParseUnitHeadersIfNeeded();
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void ParseUnitsFor(DIERef::Section section);
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uint32_t FindUnitIndex(DIERef::Section section, dw_offset_t offset);
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DISALLOW_COPY_AND_ASSIGN(DWARFDebugInfo);
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};
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#endif // SymbolFileDWARF_DWARFDebugInfo_h_
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