DIERef.h revision 341825 
1//===-- DIERef.h ------------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef SymbolFileDWARF_DIERef_h_
11#define SymbolFileDWARF_DIERef_h_
12
13#include "lldb/Core/dwarf.h"
14#include "lldb/lldb-defines.h"
15
16class DWARFFormValue;
17class SymbolFileDWARF;
18
19struct DIERef {
20  DIERef() = default;
21
22  DIERef(dw_offset_t c, dw_offset_t d) : cu_offset(c), die_offset(d) {}
23
24  //----------------------------------------------------------------------
25  // In order to properly decode a lldb::user_id_t back into a DIERef we
26  // need the DWARF file since it knows if DWARF in .o files is being used
27  // (MacOSX) or if DWO files are being used. The encoding of the user ID
28  // differs between the two types of DWARF.
29  //----------------------------------------------------------------------
30  explicit DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf);
31
32  explicit DIERef(const DWARFFormValue &form_value);
33
34  //----------------------------------------------------------------------
35  // In order to properly encode a DIERef unto a lldb::user_id_t we need
36  // the DWARF file since it knows if DWARF in .o files is being used
37  // (MacOSX) or if DWO files are being used. The encoding of the user ID
38  // differs between the two types of DWARF.
39  //----------------------------------------------------------------------
40  lldb::user_id_t GetUID(SymbolFileDWARF *dwarf) const;
41
42  bool operator<(const DIERef &ref) const {
43    return die_offset < ref.die_offset;
44  }
45
46  bool operator<(const DIERef &ref) { return die_offset < ref.die_offset; }
47
48  explicit operator bool() const {
49    return cu_offset != DW_INVALID_OFFSET || die_offset != DW_INVALID_OFFSET;
50  }
51
52  dw_offset_t cu_offset = DW_INVALID_OFFSET;
53  dw_offset_t die_offset = DW_INVALID_OFFSET;
54};
55
56typedef std::vector<DIERef> DIEArray;
57
58#endif // SymbolFileDWARF_DIERef_h_
59