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1 //===------ JITDwarfEmitter.h - Write dwarf tables into memory ------------===//
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 // This file defines a JITDwarfEmitter object that is used by the JIT to
11 // write dwarf tables to memory.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
16 #define LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
17 
18 namespace llvm {
19 
20 class Function;
21 class JITCodeEmitter;
22 class MachineFunction;
23 class MachineModuleInfo;
24 class MachineMove;
25 class MCAsmInfo;
26 class TargetData;
27 class TargetMachine;
28 class TargetRegisterInfo;
29 
30 class JITDwarfEmitter {
31   const TargetData* TD;
32   JITCodeEmitter* JCE;
33   const TargetRegisterInfo* RI;
34   const MCAsmInfo *MAI;
35   MachineModuleInfo* MMI;
36   JIT& Jit;
37   bool stackGrowthDirection;
38 
39   unsigned char* EmitExceptionTable(MachineFunction* MF,
40                                     unsigned char* StartFunction,
41                                     unsigned char* EndFunction) const;
42 
43   void EmitFrameMoves(intptr_t BaseLabelPtr,
44                       const std::vector<MachineMove> &Moves) const;
45 
46   unsigned char* EmitCommonEHFrame(const Function* Personality) const;
47 
48   unsigned char* EmitEHFrame(const Function* Personality,
49                              unsigned char* StartBufferPtr,
50                              unsigned char* StartFunction,
51                              unsigned char* EndFunction,
52                              unsigned char* ExceptionTable) const;
53 
54 public:
55 
56   JITDwarfEmitter(JIT& jit);
57 
58   unsigned char* EmitDwarfTable(MachineFunction& F,
59                                 JITCodeEmitter& JCE,
60                                 unsigned char* StartFunction,
61                                 unsigned char* EndFunction,
62                                 unsigned char* &EHFramePtr);
63 
64 
setModuleInfo(MachineModuleInfo * Info)65   void setModuleInfo(MachineModuleInfo* Info) {
66     MMI = Info;
67   }
68 };
69 
70 
71 } // end namespace llvm
72 
73 #endif // LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
74