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 Register()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 92