X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FExecutionEngine%2FMCJIT%2FMCJIT.cpp;h=5f1fac7eff16a68c5ff8b8a06677734de74d7d43;hb=875710a2fd6b3c4f814961582594bd5c1cdb493a;hp=d5aaec9333b1efd73a774112b020dfbed58de2cf;hpb=9ea47179e647e806a2c67639bfead9d254514e59;p=oota-llvm.git diff --git a/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/lib/ExecutionEngine/MCJIT/MCJIT.cpp index d5aaec9333b..5f1fac7eff1 100644 --- a/lib/ExecutionEngine/MCJIT/MCJIT.cpp +++ b/lib/ExecutionEngine/MCJIT/MCJIT.cpp @@ -8,17 +8,27 @@ //===----------------------------------------------------------------------===// #include "MCJIT.h" -#include "MCJITMemoryManager.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Function.h" #include "llvm/ExecutionEngine/GenericValue.h" -#include "llvm/ExecutionEngine/MCJIT.h" +#include "llvm/ExecutionEngine/JITEventListener.h" #include "llvm/ExecutionEngine/JITMemoryManager.h" +#include "llvm/ExecutionEngine/MCJIT.h" +#include "llvm/ExecutionEngine/ObjectBuffer.h" +#include "llvm/ExecutionEngine/ObjectImage.h" +#include "llvm/ExecutionEngine/SectionMemoryManager.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/Mangler.h" +#include "llvm/IR/Module.h" #include "llvm/MC/MCAsmInfo.h" -#include "llvm/Support/ErrorHandling.h" +#include "llvm/Object/Archive.h" +#include "llvm/PassManager.h" #include "llvm/Support/DynamicLibrary.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MemoryBuffer.h" -#include "llvm/Target/TargetData.h" +#include "llvm/Support/MutexGuard.h" +#include "llvm/Target/TargetLowering.h" +#include "llvm/Target/TargetSubtargetInfo.h" using namespace llvm; @@ -35,64 +45,302 @@ extern "C" void LLVMLinkInMCJIT() { ExecutionEngine *MCJIT::createJIT(Module *M, std::string *ErrorStr, - JITMemoryManager *JMM, - bool GVsWithCode, + RTDyldMemoryManager *MemMgr, TargetMachine *TM) { // Try to register the program as a source of symbols to resolve against. // // FIXME: Don't do this here. - sys::DynamicLibrary::LoadLibraryPermanently(0, NULL); + sys::DynamicLibrary::LoadLibraryPermanently(nullptr, nullptr); + + return new MCJIT(M, TM, MemMgr ? MemMgr : new SectionMemoryManager()); +} + +MCJIT::MCJIT(Module *m, TargetMachine *tm, RTDyldMemoryManager *MM) + : ExecutionEngine(m), TM(tm), Ctx(nullptr), MemMgr(this, MM), Dyld(&MemMgr), + ObjCache(nullptr) { + + OwnedModules.addModule(m); + setDataLayout(TM->getSubtargetImpl()->getDataLayout()); +} + +MCJIT::~MCJIT() { + MutexGuard locked(lock); + // FIXME: We are managing our modules, so we do not want the base class + // ExecutionEngine to manage them as well. To avoid double destruction + // of the first (and only) module added in ExecutionEngine constructor + // we remove it from EE and will destruct it ourselves. + // + // It may make sense to move our module manager (based on SmallStPtr) back + // into EE if the JIT and Interpreter can live with it. + // If so, additional functions: addModule, removeModule, FindFunctionNamed, + // runStaticConstructorsDestructors could be moved back to EE as well. + // + Modules.clear(); + Dyld.deregisterEHFrames(); + + LoadedObjectList::iterator it, end; + for (it = LoadedObjects.begin(), end = LoadedObjects.end(); it != end; ++it) { + ObjectImage *Obj = *it; + if (Obj) { + NotifyFreeingObject(*Obj); + delete Obj; + } + } + LoadedObjects.clear(); + + Archives.clear(); + + delete TM; +} + +void MCJIT::addModule(Module *M) { + MutexGuard locked(lock); + OwnedModules.addModule(M); +} + +bool MCJIT::removeModule(Module *M) { + MutexGuard locked(lock); + return OwnedModules.removeModule(M); +} + + + +void MCJIT::addObjectFile(std::unique_ptr Obj) { + ObjectImage *LoadedObject = Dyld.loadObject(std::move(Obj)); + if (!LoadedObject || Dyld.hasError()) + report_fatal_error(Dyld.getErrorString()); + + LoadedObjects.push_back(LoadedObject); + + NotifyObjectEmitted(*LoadedObject); +} + +void MCJIT::addArchive(std::unique_ptr A) { + Archives.push_back(std::move(A)); +} - // If the target supports JIT code generation, create the JIT. - if (TargetJITInfo *TJ = TM->getJITInfo()) - return new MCJIT(M, TM, *TJ, new MCJITMemoryManager(JMM, M), GVsWithCode); - if (ErrorStr) - *ErrorStr = "target does not support JIT code generation"; - return 0; +void MCJIT::setObjectCache(ObjectCache* NewCache) { + MutexGuard locked(lock); + ObjCache = NewCache; } -MCJIT::MCJIT(Module *m, TargetMachine *tm, TargetJITInfo &tji, - RTDyldMemoryManager *MM, bool AllocateGVsWithCode) - : ExecutionEngine(m), TM(tm), MemMgr(MM), M(m), OS(Buffer), Dyld(MM) { +ObjectBufferStream* MCJIT::emitObject(Module *M) { + MutexGuard locked(lock); + + // This must be a module which has already been added but not loaded to this + // MCJIT instance, since these conditions are tested by our caller, + // generateCodeForModule. + + PassManager PM; + + M->setDataLayout(TM->getSubtargetImpl()->getDataLayout()); + PM.add(new DataLayoutPass(M)); - setTargetData(TM->getTargetData()); - PM.add(new TargetData(*TM->getTargetData())); + // The RuntimeDyld will take ownership of this shortly + std::unique_ptr CompiledObject(new ObjectBufferStream()); // Turn the machine code intermediate representation into bytes in memory // that may be executed. - if (TM->addPassesToEmitMC(PM, Ctx, OS, false)) { + if (TM->addPassesToEmitMC(PM, Ctx, CompiledObject->getOStream(), + !getVerifyModules())) { report_fatal_error("Target does not support MC emission!"); } // Initialize passes. - // FIXME: When we support multiple modules, we'll want to move the code - // gen and finalization out of the constructor here and do it more - // on-demand as part of getPointerToFunction(). PM.run(*M); - // Flush the output buffer so the SmallVector gets its data. - OS.flush(); + // Flush the output buffer to get the generated code into memory + CompiledObject->flush(); + + // If we have an object cache, tell it about the new object. + // Note that we're using the compiled image, not the loaded image (as below). + if (ObjCache) { + // 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. + std::unique_ptr MB(CompiledObject->getMemBuffer()); + ObjCache->notifyObjectCompiled(M, MB.get()); + } + + return CompiledObject.release(); +} + +void MCJIT::generateCodeForModule(Module *M) { + // Get a thread lock to make sure we aren't trying to load multiple times + MutexGuard locked(lock); + + // This must be a module which has already been added to this MCJIT instance. + assert(OwnedModules.ownsModule(M) && + "MCJIT::generateCodeForModule: Unknown module."); + + // Re-compilation is not supported + if (OwnedModules.hasModuleBeenLoaded(M)) + return; + + std::unique_ptr ObjectToLoad; + // Try to load the pre-compiled object from cache if possible + if (ObjCache) { + std::unique_ptr PreCompiledObject(ObjCache->getObject(M)); + if (PreCompiledObject.get()) + ObjectToLoad.reset(new ObjectBuffer(PreCompiledObject.release())); + } + + // If the cache did not contain a suitable object, compile the object + if (!ObjectToLoad) { + ObjectToLoad.reset(emitObject(M)); + assert(ObjectToLoad.get() && "Compilation did not produce an object."); + } // Load the object into the dynamic linker. - // FIXME: It would be nice to avoid making yet another copy. - MemoryBuffer *MB = MemoryBuffer::getMemBufferCopy(StringRef(Buffer.data(), - Buffer.size())); - if (Dyld.loadObject(MB)) + // MCJIT now owns the ObjectImage pointer (via its LoadedObjects list). + ObjectImage *LoadedObject = Dyld.loadObject(ObjectToLoad.release()); + LoadedObjects.push_back(LoadedObject); + if (!LoadedObject) report_fatal_error(Dyld.getErrorString()); - // Resolve any relocations. + + // FIXME: Make this optional, maybe even move it to a JIT event listener + LoadedObject->registerWithDebugger(); + + NotifyObjectEmitted(*LoadedObject); + + OwnedModules.markModuleAsLoaded(M); +} + +void MCJIT::finalizeLoadedModules() { + MutexGuard locked(lock); + + // Resolve any outstanding relocations. Dyld.resolveRelocations(); + + OwnedModules.markAllLoadedModulesAsFinalized(); + + // Register EH frame data for any module we own which has been loaded + Dyld.registerEHFrames(); + + // Set page permissions. + MemMgr.finalizeMemory(); } -MCJIT::~MCJIT() { - delete MemMgr; +// FIXME: Rename this. +void MCJIT::finalizeObject() { + MutexGuard locked(lock); + + for (ModulePtrSet::iterator I = OwnedModules.begin_added(), + E = OwnedModules.end_added(); + I != E; ++I) { + Module *M = *I; + generateCodeForModule(M); + } + + finalizeLoadedModules(); +} + +void MCJIT::finalizeModule(Module *M) { + MutexGuard locked(lock); + + // This must be a module which has already been added to this MCJIT instance. + assert(OwnedModules.ownsModule(M) && "MCJIT::finalizeModule: Unknown module."); + + // If the module hasn't been compiled, just do that. + if (!OwnedModules.hasModuleBeenLoaded(M)) + generateCodeForModule(M); + + finalizeLoadedModules(); +} + +uint64_t MCJIT::getExistingSymbolAddress(const std::string &Name) { + Mangler Mang(TM->getSubtargetImpl()->getDataLayout()); + SmallString<128> FullName; + Mang.getNameWithPrefix(FullName, Name); + return Dyld.getSymbolLoadAddress(FullName); +} + +Module *MCJIT::findModuleForSymbol(const std::string &Name, + bool CheckFunctionsOnly) { + MutexGuard locked(lock); + + // If it hasn't already been generated, see if it's in one of our modules. + for (ModulePtrSet::iterator I = OwnedModules.begin_added(), + E = OwnedModules.end_added(); + I != E; ++I) { + Module *M = *I; + Function *F = M->getFunction(Name); + if (F && !F->isDeclaration()) + return M; + if (!CheckFunctionsOnly) { + GlobalVariable *G = M->getGlobalVariable(Name); + if (G && !G->isDeclaration()) + return M; + // FIXME: Do we need to worry about global aliases? + } + } + // We didn't find the symbol in any of our modules. + return nullptr; +} + +uint64_t MCJIT::getSymbolAddress(const std::string &Name, + bool CheckFunctionsOnly) +{ + MutexGuard locked(lock); + + // First, check to see if we already have this symbol. + uint64_t Addr = getExistingSymbolAddress(Name); + if (Addr) + return Addr; + + for (std::unique_ptr &A : Archives) { + // Look for our symbols in each Archive + object::Archive::child_iterator ChildIt = A->findSym(Name); + if (ChildIt != A->child_end()) { + // FIXME: Support nested archives? + ErrorOr> ChildBinOrErr = + ChildIt->getAsBinary(); + if (ChildBinOrErr.getError()) + continue; + std::unique_ptr &ChildBin = ChildBinOrErr.get(); + if (ChildBin->isObject()) { + std::unique_ptr OF( + static_cast(ChildBin.release())); + // This causes the object file to be loaded. + addObjectFile(std::move(OF)); + // The address should be here now. + 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; + + generateCodeForModule(M); + + // Check the RuntimeDyld table again, it should be there now. + return getExistingSymbolAddress(Name); +} + +uint64_t MCJIT::getGlobalValueAddress(const std::string &Name) { + MutexGuard locked(lock); + uint64_t Result = getSymbolAddress(Name, false); + if (Result != 0) + finalizeLoadedModules(); + return Result; } -void *MCJIT::getPointerToBasicBlock(BasicBlock *BB) { - report_fatal_error("not yet implemented"); - return 0; +uint64_t MCJIT::getFunctionAddress(const std::string &Name) { + MutexGuard locked(lock); + uint64_t Result = getSymbolAddress(Name, true); + if (Result != 0) + finalizeLoadedModules(); + return Result; } +// Deprecated. Use getFunctionAddress instead. void *MCJIT::getPointerToFunction(Function *F) { + MutexGuard locked(lock); + if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) { bool AbortOnFailure = !F->hasExternalWeakLinkage(); void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure); @@ -100,20 +348,63 @@ void *MCJIT::getPointerToFunction(Function *F) { return Addr; } - // FIXME: Should we be using the mangler for this? Probably. - StringRef BaseName = F->getName(); - if (BaseName[0] == '\1') - return (void*)Dyld.getSymbolAddress(BaseName.substr(1)); - return (void*)Dyld.getSymbolAddress((TM->getMCAsmInfo()->getGlobalPrefix() - + BaseName).str()); + Module *M = F->getParent(); + bool HasBeenAddedButNotLoaded = OwnedModules.hasModuleBeenAddedButNotLoaded(M); + + // Make sure the relevant module has been compiled and loaded. + if (HasBeenAddedButNotLoaded) + generateCodeForModule(M); + else if (!OwnedModules.hasModuleBeenLoaded(M)) + // If this function doesn't belong to one of our modules, we're done. + return nullptr; + + // FIXME: Should the Dyld be retaining module information? Probably not. + // + // This is the accessor for the target address, so make sure to check the + // load address of the symbol, not the local address. + Mangler Mang(TM->getSubtargetImpl()->getDataLayout()); + SmallString<128> Name; + TM->getNameWithPrefix(Name, F, Mang); + return (void*)Dyld.getSymbolLoadAddress(Name); +} + +void MCJIT::runStaticConstructorsDestructorsInModulePtrSet( + bool isDtors, ModulePtrSet::iterator I, ModulePtrSet::iterator E) { + for (; I != E; ++I) { + ExecutionEngine::runStaticConstructorsDestructors(*I, isDtors); + } +} + +void MCJIT::runStaticConstructorsDestructors(bool isDtors) { + // Execute global ctors/dtors for each module in the program. + runStaticConstructorsDestructorsInModulePtrSet( + isDtors, OwnedModules.begin_added(), OwnedModules.end_added()); + runStaticConstructorsDestructorsInModulePtrSet( + isDtors, OwnedModules.begin_loaded(), OwnedModules.end_loaded()); + runStaticConstructorsDestructorsInModulePtrSet( + isDtors, OwnedModules.begin_finalized(), OwnedModules.end_finalized()); } -void *MCJIT::recompileAndRelinkFunction(Function *F) { - report_fatal_error("not yet implemented"); +Function *MCJIT::FindFunctionNamedInModulePtrSet(const char *FnName, + ModulePtrSet::iterator I, + ModulePtrSet::iterator E) { + for (; I != E; ++I) { + if (Function *F = (*I)->getFunction(FnName)) + return F; + } + return nullptr; } -void MCJIT::freeMachineCodeForFunction(Function *F) { - report_fatal_error("not yet implemented"); +Function *MCJIT::FindFunctionNamed(const char *FnName) { + Function *F = FindFunctionNamedInModulePtrSet( + FnName, OwnedModules.begin_added(), OwnedModules.end_added()); + if (!F) + F = FindFunctionNamedInModulePtrSet(FnName, OwnedModules.begin_loaded(), + OwnedModules.end_loaded()); + if (!F) + F = FindFunctionNamedInModulePtrSet(FnName, OwnedModules.begin_finalized(), + OwnedModules.end_finalized()); + return F; } GenericValue MCJIT::runFunction(Function *F, @@ -208,12 +499,72 @@ GenericValue MCJIT::runFunction(Function *F, case Type::FP128TyID: case Type::PPC_FP128TyID: llvm_unreachable("long double not supported yet"); - return rv; case Type::PointerTyID: return PTOGV(((void*(*)())(intptr_t)FPtr)()); } } - assert(0 && "Full-featured argument passing not supported yet!"); - return GenericValue(); + llvm_unreachable("Full-featured argument passing not supported yet!"); +} + +void *MCJIT::getPointerToNamedFunction(const std::string &Name, + bool AbortOnFailure) { + if (!isSymbolSearchingDisabled()) { + void *ptr = MemMgr.getPointerToNamedFunction(Name, false); + if (ptr) + return ptr; + } + + /// If a LazyFunctionCreator is installed, use it to get/create the function. + if (LazyFunctionCreator) + if (void *RP = LazyFunctionCreator(Name)) + return RP; + + if (AbortOnFailure) { + report_fatal_error("Program used external function '"+Name+ + "' which could not be resolved!"); + } + return nullptr; +} + +void MCJIT::RegisterJITEventListener(JITEventListener *L) { + if (!L) + return; + MutexGuard locked(lock); + EventListeners.push_back(L); +} +void MCJIT::UnregisterJITEventListener(JITEventListener *L) { + if (!L) + return; + MutexGuard locked(lock); + auto I = std::find(EventListeners.rbegin(), EventListeners.rend(), L); + if (I != EventListeners.rend()) { + std::swap(*I, EventListeners.back()); + EventListeners.pop_back(); + } +} +void MCJIT::NotifyObjectEmitted(const ObjectImage& Obj) { + MutexGuard locked(lock); + MemMgr.notifyObjectLoaded(this, &Obj); + for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) { + EventListeners[I]->NotifyObjectEmitted(Obj); + } +} +void MCJIT::NotifyFreeingObject(const ObjectImage& Obj) { + MutexGuard locked(lock); + for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) { + JITEventListener *L = EventListeners[I]; + L->NotifyFreeingObject(Obj); + } +} + +uint64_t LinkingMemoryManager::getSymbolAddress(const std::string &Name) { + uint64_t Result = ParentEngine->getSymbolAddress(Name, false); + // If the symbols wasn't found and it begins with an underscore, try again + // without the underscore. + if (!Result && Name[0] == '_') + Result = ParentEngine->getSymbolAddress(Name.substr(1), false); + if (Result) + return Result; + return ClientMM->getSymbolAddress(Name); }