diff options
Diffstat (limited to 'lib/ExecutionEngine/MCJIT/MCJIT.cpp')
-rw-r--r-- | lib/ExecutionEngine/MCJIT/MCJIT.cpp | 265 |
1 files changed, 210 insertions, 55 deletions
diff --git a/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/lib/ExecutionEngine/MCJIT/MCJIT.cpp index 09dd924717..9eaff4d68a 100644 --- a/lib/ExecutionEngine/MCJIT/MCJIT.cpp +++ b/lib/ExecutionEngine/MCJIT/MCJIT.cpp @@ -18,6 +18,7 @@ #include "llvm/IR/DataLayout.h" #include "llvm/IR/DerivedTypes.h" #include "llvm/IR/Function.h" +#include "llvm/IR/Module.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/Support/DynamicLibrary.h" #include "llvm/Support/ErrorHandling.h" @@ -53,37 +54,45 @@ ExecutionEngine *MCJIT::createJIT(Module *M, MCJIT::MCJIT(Module *m, TargetMachine *tm, RTDyldMemoryManager *MM, bool AllocateGVsWithCode) - : ExecutionEngine(m), TM(tm), Ctx(0), MemMgr(MM), Dyld(MM), - IsLoaded(false), M(m), ObjCache(0) { + : ExecutionEngine(m), TM(tm), Ctx(0), MemMgr(this, MM), Dyld(&MemMgr), + ObjCache(0) { + ModuleStates[m] = ModuleAdded; setDataLayout(TM->getDataLayout()); } MCJIT::~MCJIT() { - if (LoadedObject) - NotifyFreeingObject(*LoadedObject.get()); - delete MemMgr; + LoadedObjectMap::iterator it, end = LoadedObjects.end(); + for (it = LoadedObjects.begin(); it != end; ++it) { + ObjectImage *Obj = it->second; + if (Obj) { + NotifyFreeingObject(*Obj); + delete Obj; + } + } + LoadedObjects.clear(); delete TM; } +void MCJIT::addModule(Module *M) { + Modules.push_back(M); + ModuleStates[M] = MCJITModuleState(); +} + void MCJIT::setObjectCache(ObjectCache* NewCache) { ObjCache = NewCache; } -ObjectBufferStream* MCJIT::emitObject(Module *m) { - /// 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. - assert(M == m); +ObjectBufferStream* MCJIT::emitObject(Module *M) { + // This must be a module which has already been added to this MCJIT instance. + assert(std::find(Modules.begin(), Modules.end(), M) != Modules.end()); + assert(ModuleStates.find(M) != ModuleStates.end()); // Get a thread lock to make sure we aren't trying to compile multiple times MutexGuard locked(lock); - // FIXME: Track compilation state on a per-module basis when multiple modules - // are supported. // Re-compilation is not supported - assert(!IsLoaded); + assert(!ModuleStates[M].hasBeenEmitted()); PassManager PM; @@ -99,7 +108,7 @@ ObjectBufferStream* MCJIT::emitObject(Module *m) { } // Initialize passes. - PM.run(*m); + PM.run(*M); // Flush the output buffer to get the generated code into memory CompiledObject->flush(); @@ -109,21 +118,22 @@ ObjectBufferStream* MCJIT::emitObject(Module *m) { // MemoryBuffer is a thin wrapper around the actual memory, so it's OK // to create a temporary object here and delete it after the call. OwningPtr<MemoryBuffer> MB(CompiledObject->getMemBuffer()); - ObjCache->notifyObjectCompiled(m, MB.get()); + ObjCache->notifyObjectCompiled(M, MB.get()); } return CompiledObject.take(); } -void MCJIT::loadObject(Module *M) { +void MCJIT::generateCodeForModule(Module *M) { + // This must be a module which has already been added to this MCJIT instance. + assert(std::find(Modules.begin(), Modules.end(), M) != Modules.end()); + assert(ModuleStates.find(M) != ModuleStates.end()); // Get a thread lock to make sure we aren't trying to load multiple times MutexGuard locked(lock); - // FIXME: Track compilation state on a per-module basis when multiple modules - // are supported. // Re-compilation is not supported - if (IsLoaded) + if (ModuleStates[M].hasBeenLoaded()) return; OwningPtr<ObjectBuffer> ObjectToLoad; @@ -141,59 +151,190 @@ void MCJIT::loadObject(Module *M) { } // Load the object into the dynamic linker. - // handing off ownership of the buffer - LoadedObject.reset(Dyld.loadObject(ObjectToLoad.take())); + // MCJIT now owns the ObjectImage pointer (via its LoadedObjects map). + ObjectImage *LoadedObject = Dyld.loadObject(ObjectToLoad.take()); + LoadedObjects[M] = LoadedObject; if (!LoadedObject) report_fatal_error(Dyld.getErrorString()); - // Resolve any relocations. - Dyld.resolveRelocations(); - // FIXME: Make this optional, maybe even move it to a JIT event listener LoadedObject->registerWithDebugger(); NotifyObjectEmitted(*LoadedObject); - // FIXME: Add support for per-module compilation state - IsLoaded = true; + ModuleStates[M] = ModuleLoaded; +} + +void MCJIT::finalizeLoadedModules() { + // Resolve any outstanding relocations. + Dyld.resolveRelocations(); + + // Register EH frame data for any module we own which has been loaded + SmallVector<Module *, 1>::iterator end = Modules.end(); + SmallVector<Module *, 1>::iterator it; + for (it = Modules.begin(); it != end; ++it) { + Module *M = *it; + assert(ModuleStates.find(M) != ModuleStates.end()); + + if (ModuleStates[M].hasBeenLoaded() && + !ModuleStates[M].hasBeenFinalized()) { + // FIXME: This should be module specific! + StringRef EHData = Dyld.getEHFrameSection(); + if (!EHData.empty()) + MemMgr.registerEHFrames(EHData); + ModuleStates[M] = ModuleFinalized; + } + } + + // Set page permissions. + MemMgr.finalizeMemory(); } -// FIXME: Add a parameter to identify which object is being finalized when -// MCJIT supports multiple modules. -// FIXME: Provide a way to separate code emission, relocations and page -// protection in the interface. +// FIXME: Rename this. void MCJIT::finalizeObject() { - // If the module hasn't been compiled, just do that. - if (!IsLoaded) { - // If the call to Dyld.resolveRelocations() is removed from loadObject() - // we'll need to do that here. - loadObject(M); - } else { - // Resolve any relocations. - Dyld.resolveRelocations(); + // FIXME: This is a temporary hack to get around problems with calling + // finalize multiple times. + bool finalizeNeeded = false; + SmallVector<Module *, 1>::iterator end = Modules.end(); + SmallVector<Module *, 1>::iterator it; + for (it = Modules.begin(); it != end; ++it) { + Module *M = *it; + assert(ModuleStates.find(M) != ModuleStates.end()); + if (!ModuleStates[M].hasBeenFinalized()) + finalizeNeeded = true; + + // I don't really like this, but the C API depends on this behavior. + // I suppose it's OK for a deprecated function. + if (!ModuleStates[M].hasBeenLoaded()) + generateCodeForModule(M); + } + if (!finalizeNeeded) + return; + + // Resolve any outstanding relocations. + Dyld.resolveRelocations(); + + // Register EH frame data for any module we own which has been loaded + for (it = Modules.begin(); it != end; ++it) { + Module *M = *it; + assert(ModuleStates.find(M) != ModuleStates.end()); + + if (ModuleStates[M].hasBeenLoaded() && + !ModuleStates[M].hasBeenFinalized()) { + // FIXME: This should be module specific! + StringRef EHData = Dyld.getEHFrameSection(); + if (!EHData.empty()) + MemMgr.registerEHFrames(EHData); + ModuleStates[M] = ModuleFinalized; + } } + // Set page permissions. + MemMgr.finalizeMemory(); +} + +void MCJIT::finalizeModule(Module *M) { + // This must be a module which has already been added to this MCJIT instance. + assert(std::find(Modules.begin(), Modules.end(), M) != Modules.end()); + assert(ModuleStates.find(M) != ModuleStates.end()); + + if (ModuleStates[M].hasBeenFinalized()) + return; + + // If the module hasn't been compiled, just do that. + if (!ModuleStates[M].hasBeenLoaded()) + generateCodeForModule(M); + + // Resolve any outstanding relocations. + Dyld.resolveRelocations(); + + // FIXME: Should this be module specific? StringRef EHData = Dyld.getEHFrameSection(); if (!EHData.empty()) - MemMgr->registerEHFrames(EHData); + MemMgr.registerEHFrames(EHData); // Set page permissions. - MemMgr->finalizeMemory(); + MemMgr.finalizeMemory(); + + ModuleStates[M] = ModuleFinalized; } void *MCJIT::getPointerToBasicBlock(BasicBlock *BB) { report_fatal_error("not yet implemented"); } -void *MCJIT::getPointerToFunction(Function *F) { - // FIXME: This should really return a uint64_t since it's a pointer in the - // target address space, not our local address space. That's part of the - // ExecutionEngine interface, though. Fix that when the old JIT finally - // dies. +uint64_t MCJIT::getExistingSymbolAddress(const std::string &Name) { + // Check with the RuntimeDyld to see if we already have this symbol. + if (Name[0] == '\1') + return Dyld.getSymbolLoadAddress(Name.substr(1)); + return Dyld.getSymbolLoadAddress((TM->getMCAsmInfo()->getGlobalPrefix() + + Name)); +} + +Module *MCJIT::findModuleForSymbol(const std::string &Name, + bool CheckFunctionsOnly) { + // If it hasn't already been generated, see if it's in one of our modules. + SmallVector<Module *, 1>::iterator end = Modules.end(); + SmallVector<Module *, 1>::iterator it; + for (it = Modules.begin(); it != end; ++it) { + Module *M = *it; + Function *F = M->getFunction(Name); + if (F && !F->empty()) + return M; + if (!CheckFunctionsOnly) { + GlobalVariable *G = M->getGlobalVariable(Name); + if (G) + return M; + // FIXME: Do we need to worry about global aliases? + } + } + // We didn't find the symbol in any of our modules. + return NULL; +} + +uint64_t MCJIT::getSymbolAddress(const std::string &Name, + bool CheckFunctionsOnly) +{ + // First, check to see if we already have this symbol. + uint64_t Addr = getExistingSymbolAddress(Name); + if (Addr) + return Addr; + + // If it hasn't already been generated, see if it's in one of our modules. + Module *M = findModuleForSymbol(Name, CheckFunctionsOnly); + if (!M) + return 0; + + // If this is in one of our modules, generate code for that module. + assert(ModuleStates.find(M) != ModuleStates.end()); + // If the module code has already been generated, we won't find the symbol. + if (ModuleStates[M].hasBeenLoaded()) + return 0; - // FIXME: Add support for per-module compilation state - if (!IsLoaded) - loadObject(M); + // FIXME: We probably need to make sure we aren't in the process of + // loading or finalizing this module. + generateCodeForModule(M); + + // Check the RuntimeDyld table again, it should be there now. + return getExistingSymbolAddress(Name); +} + +uint64_t MCJIT::getGlobalValueAddress(const std::string &Name) { + uint64_t Result = getSymbolAddress(Name, false); + if (Result != 0) + finalizeLoadedModules(); + return Result; +} + +uint64_t MCJIT::getFunctionAddress(const std::string &Name) { + uint64_t Result = getSymbolAddress(Name, true); + if (Result != 0) + finalizeLoadedModules(); + return Result; +} + +// Deprecated. Use getFunctionAddress instead. +void *MCJIT::getPointerToFunction(Function *F) { if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) { bool AbortOnFailure = !F->hasExternalWeakLinkage(); @@ -202,6 +343,17 @@ void *MCJIT::getPointerToFunction(Function *F) { return Addr; } + // If this function doesn't belong to one of our modules, we're done. + Module *M = F->getParent(); + if (std::find(Modules.begin(), Modules.end(), M) == Modules.end()) + return NULL; + + assert(ModuleStates.find(M) != ModuleStates.end()); + + // Make sure the relevant module has been compiled and loaded. + if (!ModuleStates[M].hasBeenLoaded()) + generateCodeForModule(M); + // FIXME: Should the Dyld be retaining module information? Probably not. // FIXME: Should we be using the mangler for this? Probably. // @@ -324,12 +476,8 @@ GenericValue MCJIT::runFunction(Function *F, void *MCJIT::getPointerToNamedFunction(const std::string &Name, bool AbortOnFailure) { - // FIXME: Add support for per-module compilation state - if (!IsLoaded) - loadObject(M); - - if (!isSymbolSearchingDisabled() && MemMgr) { - void *ptr = MemMgr->getPointerToNamedFunction(Name, false); + if (!isSymbolSearchingDisabled()) { + void *ptr = MemMgr.getPointerToNamedFunction(Name, false); if (ptr) return ptr; } @@ -375,3 +523,10 @@ void MCJIT::NotifyFreeingObject(const ObjectImage& Obj) { EventListeners[I]->NotifyFreeingObject(Obj); } } + +uint64_t LinkingMemoryManager::getSymbolAddress(const std::string &Name) { + uint64_t Result = ParentEngine->getSymbolAddress(Name, false); + if (Result) + return Result; + return ClientMM->getSymbolAddress(Name); +} |