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, bool AllocateGVsWithCode); 28 29 TargetMachine *TM; 30 MCContext *Ctx; 31 RTDyldMemoryManager *MemMgr; 32 33 // FIXME: These may need moved to a separate 'jitstate' member like the 34 // non-MC JIT does for multithreading and such. Just keep them here for now. 35 PassManager PM; 36 Module *M; 37 // FIXME: This really doesn't belong here. 38 SmallVector<char, 4096> Buffer; // Working buffer into which we JIT. 39 raw_svector_ostream OS; 40 41 RuntimeDyld Dyld; 42 43 public: 44 ~MCJIT(); 45 46 /// @name ExecutionEngine interface implementation 47 /// @{ 48 49 virtual void *getPointerToBasicBlock(BasicBlock *BB); 50 51 virtual void *getPointerToFunction(Function *F); 52 53 virtual void *recompileAndRelinkFunction(Function *F); 54 55 virtual void freeMachineCodeForFunction(Function *F); 56 57 virtual GenericValue runFunction(Function *F, 58 const std::vector<GenericValue> &ArgValues); 59 60 /// getPointerToNamedFunction - This method returns the address of the 61 /// specified function by using the dlsym function call. As such it is only 62 /// useful for resolving library symbols, not code generated symbols. 63 /// 64 /// If AbortOnFailure is false and no function with the given name is 65 /// found, this function silently returns a null pointer. Otherwise, 66 /// it prints a message to stderr and aborts. 67 /// 68 virtual void *getPointerToNamedFunction(const std::string &Name, 69 bool AbortOnFailure = true); 70 71 /// mapSectionAddress - map a section to its target address space value. 72 /// Map the address of a JIT section as returned from the memory manager 73 /// to the address in the target process as the running code will see it. 74 /// This is the address which will be used for relocation resolution. 75 virtual void mapSectionAddress(void *LocalAddress, uint64_t TargetAddress) { 76 Dyld.mapSectionAddress(LocalAddress, TargetAddress); 77 } 78 79 /// @} 80 /// @name (Private) Registration Interfaces 81 /// @{ 82 83 static void Register() { 84 MCJITCtor = createJIT; 85 } 86 87 static ExecutionEngine *createJIT(Module *M, 88 std::string *ErrorStr, 89 JITMemoryManager *JMM, 90 bool GVsWithCode, 91 TargetMachine *TM); 92 93 // @} 94 }; 95 96 } // End llvm namespace 97 98 #endif 99
