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//===- DWARFDebugInfoEntry.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H
#define LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
#include <cstdint>
namespace llvm {
class DWARFUnit;
class DWARFDataExtractor;
/// DWARFDebugInfoEntry - A DIE with only the minimum required data.
class DWARFDebugInfoEntry {
/// Offset within the .debug_info of the start of this entry.
uint64_t Offset = 0;
/// Index of the parent die. UINT32_MAX if there is no parent.
uint32_t ParentIdx = UINT32_MAX;
/// Index of the sibling die. Zero if there is no sibling.
uint32_t SiblingIdx = 0;
const DWARFAbbreviationDeclaration *AbbrevDecl = nullptr;
public:
DWARFDebugInfoEntry() = default;
/// Extracts a debug info entry, which is a child of a given unit,
/// starting at a given offset. If DIE can't be extracted, returns false and
/// doesn't change OffsetPtr.
/// High performance extraction should use this call.
bool extractFast(const DWARFUnit &U, uint64_t *OffsetPtr,
const DWARFDataExtractor &DebugInfoData, uint64_t UEndOffset,
uint32_t ParentIdx);
uint64_t getOffset() const { return Offset; }
/// Returns index of the parent die.
std::optional<uint32_t> getParentIdx() const {
if (ParentIdx == UINT32_MAX)
return std::nullopt;
return ParentIdx;
}
/// Returns index of the sibling die.
std::optional<uint32_t> getSiblingIdx() const {
if (SiblingIdx == 0)
return std::nullopt;
return SiblingIdx;
}
/// Set index of sibling.
void setSiblingIdx(uint32_t Idx) { SiblingIdx = Idx; }
dwarf::Tag getTag() const {
return AbbrevDecl ? AbbrevDecl->getTag() : dwarf::DW_TAG_null;
}
bool hasChildren() const { return AbbrevDecl && AbbrevDecl->hasChildren(); }
const DWARFAbbreviationDeclaration *getAbbreviationDeclarationPtr() const {
return AbbrevDecl;
}
};
} // end namespace llvm
#endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H
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