lib/ExecutionEngine/MCJIT/MCJIT.h

   1 //===-- MCJIT.h - Class definition for the MCJIT ----------------*- 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_EXECUTIONENGINE_MCJIT_H
  11 #define LLVM_LIB_EXECUTIONENGINE_MCJIT_H
  12
  13 #include "llvm/PassManager.h"
  14 #include "llvm/ExecutionEngine/ExecutionEngine.h"
  15 #include "llvm/ExecutionEngine/RuntimeDyld.h"
  16 #include "llvm/ADT/SmallVector.h"
  17 #include "llvm/Support/raw_ostream.h"
  18
  19 namespace llvm {
  20
  21 // FIXME: This makes all kinds of horrible assumptions for the time being,
  22 // like only having one module, not needing to worry about multi-threading,
  23 // blah blah. Purely in get-it-up-and-limping mode for now.
  24
  25 class MCJIT : public ExecutionEngine {
  26   MCJIT(Module *M, TargetMachine *tm, TargetJITInfo &tji,
  27         RTDyldMemoryManager *MemMgr, CodeGenOpt::Level OptLevel,
  28         bool AllocateGVsWithCode);
  29
  30   TargetMachine *TM;
  31   MCContext *Ctx;
  32   RTDyldMemoryManager *MemMgr;
  33
  34   // FIXME: These may need moved to a separate 'jitstate' member like the
  35   // non-MC JIT does for multithreading and such. Just keep them here for now.
  36   PassManager PM;
  37   Module *M;
  38   // FIXME: This really doesn't belong here.
  39   SmallVector<char, 4096> Buffer; // Working buffer into which we JIT.
  40   raw_svector_ostream OS;
  41
  42   RuntimeDyld Dyld;
  43
  44 public:
  45   ~MCJIT();
  46
  47   /// @name ExecutionEngine interface implementation
  48   /// @{
  49
  50   virtual void *getPointerToBasicBlock(BasicBlock *BB);
  51
  52   virtual void *getPointerToFunction(Function *F);
  53
  54   virtual void *recompileAndRelinkFunction(Function *F);
  55
  56   virtual void freeMachineCodeForFunction(Function *F);
  57
  58   virtual GenericValue runFunction(Function *F,
  59                                    const std::vector<GenericValue> &ArgValues);
  60
  61   /// getPointerToNamedFunction - This method returns the address of the
  62   /// specified function by using the dlsym function call.  As such it is only
  63   /// useful for resolving library symbols, not code generated symbols.
  64   ///
  65   /// If AbortOnFailure is false and no function with the given name is
  66   /// found, this function silently returns a null pointer. Otherwise,
  67   /// it prints a message to stderr and aborts.
  68   ///
  69   void *getPointerToNamedFunction(const std::string &Name,
  70                                   bool AbortOnFailure = true);
  71   /// @}
  72   /// @name (Private) Registration Interfaces
  73   /// @{
  74
  75   static void Register() {
  76     MCJITCtor = createJIT;
  77   }
  78
  79   static ExecutionEngine *createJIT(Module *M,
  80                                     std::string *ErrorStr,
  81                                     JITMemoryManager *JMM,
  82                                     CodeGenOpt::Level OptLevel,
  83                                     bool GVsWithCode,
  84                                     TargetMachine *TM);
  85
  86   // @}
  87 };
  88
  89 } // End llvm namespace
  90
  91 #endif