LLVM  10.0.0svn
DWARFDebugInfoEntry.h
Go to the documentation of this file.
1 //===- DWARFDebugInfoEntry.h ------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
10 #define LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
11 
15 #include <cstdint>
16 
17 namespace llvm {
18 
19 class DataExtractor;
20 class DWARFUnit;
21 
22 /// DWARFDebugInfoEntry - A DIE with only the minimum required data.
24  /// Offset within the .debug_info of the start of this entry.
25  uint64_t Offset = 0;
26 
27  /// The integer depth of this DIE within the compile unit DIEs where the
28  /// compile/type unit DIE has a depth of zero.
29  uint32_t Depth = 0;
30 
31  const DWARFAbbreviationDeclaration *AbbrevDecl = nullptr;
32 
33 public:
34  DWARFDebugInfoEntry() = default;
35 
36  /// Extracts a debug info entry, which is a child of a given unit,
37  /// starting at a given offset. If DIE can't be extracted, returns false and
38  /// doesn't change OffsetPtr.
39  bool extractFast(const DWARFUnit &U, uint64_t *OffsetPtr);
40 
41  /// High performance extraction should use this call.
42  bool extractFast(const DWARFUnit &U, uint64_t *OffsetPtr,
43  const DWARFDataExtractor &DebugInfoData, uint64_t UEndOffset,
44  uint32_t Depth);
45 
46  uint64_t getOffset() const { return Offset; }
47  uint32_t getDepth() const { return Depth; }
48 
49  dwarf::Tag getTag() const {
50  return AbbrevDecl ? AbbrevDecl->getTag() : dwarf::DW_TAG_null;
51  }
52 
53  bool hasChildren() const { return AbbrevDecl && AbbrevDecl->hasChildren(); }
54 
56  return AbbrevDecl;
57  }
58 };
59 
60 } // end namespace llvm
61 
62 #endif // LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool extractFast(const DWARFUnit &U, uint64_t *OffsetPtr)
Extracts a debug info entry, which is a child of a given unit, starting at a given offset...
A DataExtractor (typically for an in-memory copy of an object-file section) plus a relocation map for...
const DWARFAbbreviationDeclaration * getAbbreviationDeclarationPtr() const
This file contains constants used for implementing Dwarf debug support.
DWARFDebugInfoEntry - A DIE with only the minimum required data.