1 //===--- DWARFAcceleratorTable.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 LLVM_LIB_DEBUGINFO_DWARFACCELERATORTABLE_H
11 #define LLVM_LIB_DEBUGINFO_DWARFACCELERATORTABLE_H
12 
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
15 #include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
16 #include <cstdint>
17 
18 namespace llvm {
19 
20 class DWARFAcceleratorTable {
21 
22   struct Header {
23     uint32_t Magic;
24     uint16_t Version;
25     uint16_t HashFunction;
26     uint32_t NumBuckets;
27     uint32_t NumHashes;
28     uint32_t HeaderDataLength;
29   };
30 
31   struct HeaderData {
32     typedef uint16_t AtomType;
33     typedef uint16_t Form;
34     uint32_t DIEOffsetBase;
35     SmallVector<std::pair<AtomType, Form>, 3> Atoms;
36   };
37 
38   struct Header Hdr;
39   struct HeaderData HdrData;
40   DataExtractor AccelSection;
41   DataExtractor StringSection;
42   const RelocAddrMap& Relocs;
43 public:
DWARFAcceleratorTable(DataExtractor AccelSection,DataExtractor StringSection,const RelocAddrMap & Relocs)44   DWARFAcceleratorTable(DataExtractor AccelSection, DataExtractor StringSection,
45                         const RelocAddrMap &Relocs)
46     : AccelSection(AccelSection), StringSection(StringSection), Relocs(Relocs) {}
47 
48   bool extract();
49   void dump(raw_ostream &OS) const;
50 };
51 
52 }
53 
54 #endif
55