#ifndef LLVM_LIB_EXECUTIONENGINE_MCJIT_H
#define LLVM_LIB_EXECUTIONENGINE_MCJIT_H
-#include "llvm/PassManager.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/ObjectCache.h"
+#include "llvm/ExecutionEngine/ObjectImage.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/PassManager.h"
namespace llvm {
+class MCJIT;
+
+// This is a helper class that the MCJIT execution engine uses for linking
+// functions across modules that it owns. It aggregates the memory manager
+// that is passed in to the MCJIT constructor and defers most functionality
+// to that object.
+class LinkingMemoryManager : public RTDyldMemoryManager {
+public:
+ LinkingMemoryManager(MCJIT *Parent, RTDyldMemoryManager *MM)
+ : ParentEngine(Parent), ClientMM(MM) {}
+
+ virtual uint64_t getSymbolAddress(const std::string &Name);
+
+ // Functions deferred to client memory manager
+ virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID) {
+ return ClientMM->allocateCodeSection(Size, Alignment, SectionID);
+ }
+
+ virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+ unsigned SectionID, bool IsReadOnly) {
+ return ClientMM->allocateDataSection(Size, Alignment,
+ SectionID, IsReadOnly);
+ }
+
+ virtual void registerEHFrames(StringRef SectionData) {
+ ClientMM->registerEHFrames(SectionData);
+ }
+
+ virtual bool finalizeMemory(std::string *ErrMsg = 0) {
+ return ClientMM->finalizeMemory(ErrMsg);
+ }
+
+private:
+ MCJIT *ParentEngine;
+ OwningPtr<RTDyldMemoryManager> ClientMM;
+};
+
// FIXME: This makes all kinds of horrible assumptions for the time being,
// like only having one module, not needing to worry about multi-threading,
// blah blah. Purely in get-it-up-and-limping mode for now.
class MCJIT : public ExecutionEngine {
- MCJIT(Module *M, TargetMachine *tm, TargetJITInfo &tji,
- RTDyldMemoryManager *MemMgr, CodeGenOpt::Level OptLevel,
+ MCJIT(Module *M, TargetMachine *tm, RTDyldMemoryManager *MemMgr,
bool AllocateGVsWithCode);
+ enum ModuleState {
+ ModuleAdded,
+ ModuleEmitted,
+ ModuleLoading,
+ ModuleLoaded,
+ ModuleFinalizing,
+ ModuleFinalized
+ };
+
+ class MCJITModuleState {
+ public:
+ MCJITModuleState() : State(ModuleAdded) {}
+
+ MCJITModuleState & operator=(ModuleState s) { State = s; return *this; }
+ bool hasBeenEmitted() { return State != ModuleAdded; }
+ bool hasBeenLoaded() { return State != ModuleAdded &&
+ State != ModuleEmitted; }
+ bool hasBeenFinalized() { return State == ModuleFinalized; }
+
+ private:
+ ModuleState State;
+ };
+
TargetMachine *TM;
MCContext *Ctx;
- RTDyldMemoryManager *MemMgr;
+ LinkingMemoryManager MemMgr;
+ RuntimeDyld Dyld;
+ SmallVector<JITEventListener*, 2> EventListeners;
- // FIXME: These may need moved to a separate 'jitstate' member like the
- // non-MC JIT does for multithreading and such. Just keep them here for now.
- PassManager PM;
- Module *M;
- // FIXME: This really doesn't belong here.
- SmallVector<char, 4096> Buffer; // Working buffer into which we JIT.
- raw_svector_ostream OS;
+ typedef DenseMap<Module *, MCJITModuleState> ModuleStateMap;
+ ModuleStateMap ModuleStates;
- RuntimeDyld Dyld;
+ typedef DenseMap<Module *, ObjectImage *> LoadedObjectMap;
+ LoadedObjectMap LoadedObjects;
+
+ // An optional ObjectCache to be notified of compiled objects and used to
+ // perform lookup of pre-compiled code to avoid re-compilation.
+ ObjectCache *ObjCache;
public:
~MCJIT();
/// @name ExecutionEngine interface implementation
/// @{
+ virtual void addModule(Module *M);
+
+ /// Sets the object manager that MCJIT should use to avoid compilation.
+ virtual void setObjectCache(ObjectCache *manager);
+
+ virtual void generateCodeForModule(Module *M);
+
+ /// finalizeObject - ensure the module is fully processed and is usable.
+ ///
+ /// It is the user-level function for completing the process of making the
+ /// object usable for execution. It should be called after sections within an
+ /// object have been relocated using mapSectionAddress. When this method is
+ /// called the MCJIT execution engine will reapply relocations for a loaded
+ /// object.
+ /// FIXME: Do we really need both of these?
+ virtual void finalizeObject();
+ virtual void finalizeModule(Module *);
+ void finalizeLoadedModules();
virtual void *getPointerToBasicBlock(BasicBlock *BB);
/// found, this function silently returns a null pointer. Otherwise,
/// it prints a message to stderr and aborts.
///
- void *getPointerToNamedFunction(const std::string &Name,
- bool AbortOnFailure = true);
+ virtual void *getPointerToNamedFunction(const std::string &Name,
+ bool AbortOnFailure = true);
+
+ /// mapSectionAddress - map a section to its target address space value.
+ /// Map the address of a JIT section as returned from the memory manager
+ /// to the address in the target process as the running code will see it.
+ /// This is the address which will be used for relocation resolution.
+ virtual void mapSectionAddress(const void *LocalAddress,
+ uint64_t TargetAddress) {
+ Dyld.mapSectionAddress(LocalAddress, TargetAddress);
+ }
+ virtual void RegisterJITEventListener(JITEventListener *L);
+ virtual void UnregisterJITEventListener(JITEventListener *L);
+
+ // If successful, these function will implicitly finalize all loaded objects.
+ // To get a function address within MCJIT without causing a finalize, use
+ // getSymbolAddress.
+ virtual uint64_t getGlobalValueAddress(const std::string &Name);
+ virtual uint64_t getFunctionAddress(const std::string &Name);
+
/// @}
/// @name (Private) Registration Interfaces
/// @{
MCJITCtor = createJIT;
}
- // FIXME: This routine is scheduled for termination. Do not use it.
- static TargetMachine *selectTarget(Module *M,
- StringRef MArch,
- StringRef MCPU,
- const SmallVectorImpl<std::string>& MAttrs,
- std::string *Err);
-
static ExecutionEngine *createJIT(Module *M,
std::string *ErrorStr,
- JITMemoryManager *JMM,
- CodeGenOpt::Level OptLevel,
+ RTDyldMemoryManager *MemMgr,
bool GVsWithCode,
- CodeModel::Model CMM,
- StringRef MArch,
- StringRef MCPU,
- const SmallVectorImpl<std::string>& MAttrs);
+ TargetMachine *TM);
// @}
+
+ // This is not directly exposed via the ExecutionEngine API, but it is
+ // used by the LinkingMemoryManager.
+ uint64_t getSymbolAddress(const std::string &Name,
+ bool CheckFunctionsOnly);
+
+protected:
+ /// emitObject -- Generate a JITed object in memory from the specified module
+ /// Currently, MCJIT only supports a single module and the module passed to
+ /// this function call is expected to be the contained module. The module
+ /// is passed as a parameter here to prepare for multiple module support in
+ /// the future.
+ ObjectBufferStream* emitObject(Module *M);
+
+ void NotifyObjectEmitted(const ObjectImage& Obj);
+ void NotifyFreeingObject(const ObjectImage& Obj);
+
+ uint64_t getExistingSymbolAddress(const std::string &Name);
+ Module *findModuleForSymbol(const std::string &Name,
+ bool CheckFunctionsOnly);
};
} // End llvm namespace
projects / oota-llvm.git / blobdiff