forked from OSchip/llvm-project
131 lines
4.5 KiB
C++
131 lines
4.5 KiB
C++
//===-- MCJIT.h - Class definition for the MCJIT ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_EXECUTIONENGINE_MCJIT_H
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#define LLVM_LIB_EXECUTIONENGINE_MCJIT_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/ExecutionEngine/ObjectCache.h"
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#include "llvm/ExecutionEngine/RuntimeDyld.h"
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#include "llvm/PassManager.h"
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namespace llvm {
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class ObjectImage;
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// FIXME: This makes all kinds of horrible assumptions for the time being,
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// like only having one module, not needing to worry about multi-threading,
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// blah blah. Purely in get-it-up-and-limping mode for now.
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class MCJIT : public ExecutionEngine {
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MCJIT(Module *M, TargetMachine *tm, RTDyldMemoryManager *MemMgr,
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bool AllocateGVsWithCode);
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TargetMachine *TM;
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MCContext *Ctx;
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RTDyldMemoryManager *MemMgr;
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RuntimeDyld Dyld;
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SmallVector<JITEventListener*, 2> EventListeners;
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// FIXME: Add support for multiple modules
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bool IsLoaded;
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Module *M;
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OwningPtr<ObjectImage> LoadedObject;
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// An optional ObjectCache to be notified of compiled objects and used to
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// perform lookup of pre-compiled code to avoid re-compilation.
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ObjectCache *ObjCache;
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public:
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~MCJIT();
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/// @name ExecutionEngine interface implementation
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/// @{
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/// Sets the object manager that MCJIT should use to avoid compilation.
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virtual void setObjectCache(ObjectCache *manager);
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/// finalizeObject - ensure the module is fully processed and is usable.
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///
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/// It is the user-level function for completing the process of making the
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/// object usable for execution. It should be called after sections within an
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/// object have been relocated using mapSectionAddress. When this method is
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/// called the MCJIT execution engine will reapply relocations for a loaded
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/// object.
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virtual void finalizeObject();
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virtual void *getPointerToBasicBlock(BasicBlock *BB);
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virtual void *getPointerToFunction(Function *F);
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virtual void *recompileAndRelinkFunction(Function *F);
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virtual void freeMachineCodeForFunction(Function *F);
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virtual GenericValue runFunction(Function *F,
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const std::vector<GenericValue> &ArgValues);
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/// getPointerToNamedFunction - This method returns the address of the
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/// specified function by using the dlsym function call. As such it is only
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/// useful for resolving library symbols, not code generated symbols.
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///
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/// If AbortOnFailure is false and no function with the given name is
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/// found, this function silently returns a null pointer. Otherwise,
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/// it prints a message to stderr and aborts.
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///
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virtual void *getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure = true);
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/// mapSectionAddress - map a section to its target address space value.
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/// Map the address of a JIT section as returned from the memory manager
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/// to the address in the target process as the running code will see it.
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/// This is the address which will be used for relocation resolution.
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virtual void mapSectionAddress(const void *LocalAddress,
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uint64_t TargetAddress) {
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Dyld.mapSectionAddress(LocalAddress, TargetAddress);
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}
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virtual void RegisterJITEventListener(JITEventListener *L);
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virtual void UnregisterJITEventListener(JITEventListener *L);
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/// @}
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/// @name (Private) Registration Interfaces
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/// @{
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static void Register() {
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MCJITCtor = createJIT;
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}
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static ExecutionEngine *createJIT(Module *M,
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std::string *ErrorStr,
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RTDyldMemoryManager *MemMgr,
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bool GVsWithCode,
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TargetMachine *TM);
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// @}
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protected:
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/// emitObject -- Generate a JITed object in memory from the specified module
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/// Currently, MCJIT only supports a single module and the module passed to
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/// this function call is expected to be the contained module. The module
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/// is passed as a parameter here to prepare for multiple module support in
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/// the future.
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ObjectBufferStream* emitObject(Module *M);
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void loadObject(Module *M);
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void NotifyObjectEmitted(const ObjectImage& Obj);
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void NotifyFreeingObject(const ObjectImage& Obj);
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};
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} // End llvm namespace
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#endif
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