lib/ExecutionEngine/JIT/JITDwarfEmitter.h

   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 TargetData;
  26 class TargetMachine;
  27 class TargetRegisterInfo;
  28
  29 class JITDwarfEmitter {
  30   const TargetData* TD;
  31   JITCodeEmitter* JCE;
  32   const TargetRegisterInfo* RI;
  33   MachineModuleInfo* MMI;
  34   JIT& Jit;
  35   bool stackGrowthDirection;
  36
  37   unsigned char* EmitExceptionTable(MachineFunction* MF,
  38                                     unsigned char* StartFunction,
  39                                     unsigned char* EndFunction) const;
  40
  41   void EmitFrameMoves(intptr_t BaseLabelPtr,
  42                       const std::vector<MachineMove> &Moves) const;
  43
  44   unsigned char* EmitCommonEHFrame(const Function* Personality) const;
  45
  46   unsigned char* EmitEHFrame(const Function* Personality,
  47                              unsigned char* StartBufferPtr,
  48                              unsigned char* StartFunction,
  49                              unsigned char* EndFunction,
  50                              unsigned char* ExceptionTable) const;
  51
  52   unsigned GetExceptionTableSizeInBytes(MachineFunction* MF) const;
  53
  54   unsigned
  55     GetFrameMovesSizeInBytes(intptr_t BaseLabelPtr,
  56                              const std::vector<MachineMove> &Moves) const;
  57
  58   unsigned GetCommonEHFrameSizeInBytes(const Function* Personality) const;
  59
  60   unsigned GetEHFrameSizeInBytes(const Function* Personality,
  61                                  unsigned char* StartFunction) const;
  62
  63 public:
  64
  65   JITDwarfEmitter(JIT& jit);
  66
  67   unsigned char* EmitDwarfTable(MachineFunction& F,
  68                                 JITCodeEmitter& JCE,
  69                                 unsigned char* StartFunction,
  70                                 unsigned char* EndFunction,
  71                                 unsigned char* &EHFramePtr);
  72
  73
  74   unsigned GetDwarfTableSizeInBytes(MachineFunction& F,
  75                                     JITCodeEmitter& JCE,
  76                                     unsigned char* StartFunction,
  77                                     unsigned char* EndFunction);
  78
  79   void setModuleInfo(MachineModuleInfo* Info) {
  80     MMI = Info;
  81   }
  82 };
  83
  84
  85 } // end namespace llvm
  86
  87 #endif // LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H