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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- DWARFDebugInfoEntry.h ------------------------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |||
| 9 | #ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H |
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| 10 | #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H |
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| 11 | |||
| 12 | #include "llvm/BinaryFormat/Dwarf.h" |
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| 13 | #include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h" |
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| 14 | #include <cstdint> |
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| 15 | |||
| 16 | namespace llvm { |
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| 17 | |||
| 18 | class DWARFUnit; |
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| 19 | class DWARFDataExtractor; |
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| 20 | |||
| 21 | /// DWARFDebugInfoEntry - A DIE with only the minimum required data. |
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| 22 | class DWARFDebugInfoEntry { |
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| 23 | /// Offset within the .debug_info of the start of this entry. |
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| 24 | uint64_t Offset = 0; |
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| 25 | |||
| 26 | /// Index of the parent die. UINT32_MAX if there is no parent. |
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| 27 | uint32_t ParentIdx = UINT32_MAX; |
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| 28 | |||
| 29 | /// Index of the sibling die. Zero if there is no sibling. |
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| 30 | uint32_t SiblingIdx = 0; |
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| 31 | |||
| 32 | const DWARFAbbreviationDeclaration *AbbrevDecl = nullptr; |
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| 33 | |||
| 34 | public: |
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| 35 | DWARFDebugInfoEntry() = default; |
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| 36 | |||
| 37 | /// Extracts a debug info entry, which is a child of a given unit, |
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| 38 | /// starting at a given offset. If DIE can't be extracted, returns false and |
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| 39 | /// doesn't change OffsetPtr. |
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| 40 | /// High performance extraction should use this call. |
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| 41 | bool extractFast(const DWARFUnit &U, uint64_t *OffsetPtr, |
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| 42 | const DWARFDataExtractor &DebugInfoData, uint64_t UEndOffset, |
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| 43 | uint32_t ParentIdx); |
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| 44 | |||
| 45 | uint64_t getOffset() const { return Offset; } |
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| 46 | |||
| 47 | /// Returns index of the parent die. |
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| 48 | std::optional<uint32_t> getParentIdx() const { |
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| 49 | if (ParentIdx == UINT32_MAX) |
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| 50 | return std::nullopt; |
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| 51 | |||
| 52 | return ParentIdx; |
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| 53 | } |
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| 54 | |||
| 55 | /// Returns index of the sibling die. |
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| 56 | std::optional<uint32_t> getSiblingIdx() const { |
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| 57 | if (SiblingIdx == 0) |
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| 58 | return std::nullopt; |
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| 59 | |||
| 60 | return SiblingIdx; |
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| 61 | } |
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| 62 | |||
| 63 | /// Set index of sibling. |
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| 64 | void setSiblingIdx(uint32_t Idx) { SiblingIdx = Idx; } |
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| 65 | |||
| 66 | dwarf::Tag getTag() const { |
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| 67 | return AbbrevDecl ? AbbrevDecl->getTag() : dwarf::DW_TAG_null; |
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| 68 | } |
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| 69 | |||
| 70 | bool hasChildren() const { return AbbrevDecl && AbbrevDecl->hasChildren(); } |
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| 71 | |||
| 72 | const DWARFAbbreviationDeclaration *getAbbreviationDeclarationPtr() const { |
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| 73 | return AbbrevDecl; |
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| 74 | } |
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| 75 | }; |
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| 76 | |||
| 77 | } // end namespace llvm |
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| 78 | |||
| 79 | #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGINFOENTRY_H |