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Diffstat (limited to 'contrib/llvm-project/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp | 685 |
1 files changed, 685 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/contrib/llvm-project/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp new file mode 100644 index 000000000000..4ac901daa5c8 --- /dev/null +++ b/contrib/llvm-project/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp @@ -0,0 +1,685 @@ +//===-- MCJIT.cpp - MC-based Just-in-Time Compiler ------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "MCJIT.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/ExecutionEngine/GenericValue.h" +#include "llvm/ExecutionEngine/JITEventListener.h" +#include "llvm/ExecutionEngine/MCJIT.h" +#include "llvm/ExecutionEngine/ObjectCache.h" +#include "llvm/ExecutionEngine/SectionMemoryManager.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/LegacyPassManager.h" +#include "llvm/IR/Mangler.h" +#include "llvm/IR/Module.h" +#include "llvm/MC/MCContext.h" +#include "llvm/Object/Archive.h" +#include "llvm/Object/ObjectFile.h" +#include "llvm/Support/DynamicLibrary.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/SmallVectorMemoryBuffer.h" +#include <mutex> + +using namespace llvm; + +namespace { + +static struct RegisterJIT { + RegisterJIT() { MCJIT::Register(); } +} JITRegistrator; + +} + +extern "C" void LLVMLinkInMCJIT() { +} + +ExecutionEngine * +MCJIT::createJIT(std::unique_ptr<Module> M, std::string *ErrorStr, + std::shared_ptr<MCJITMemoryManager> MemMgr, + std::shared_ptr<LegacyJITSymbolResolver> Resolver, + std::unique_ptr<TargetMachine> TM) { + // Try to register the program as a source of symbols to resolve against. + // + // FIXME: Don't do this here. + sys::DynamicLibrary::LoadLibraryPermanently(nullptr, nullptr); + + if (!MemMgr || !Resolver) { + auto RTDyldMM = std::make_shared<SectionMemoryManager>(); + if (!MemMgr) + MemMgr = RTDyldMM; + if (!Resolver) + Resolver = RTDyldMM; + } + + return new MCJIT(std::move(M), std::move(TM), std::move(MemMgr), + std::move(Resolver)); +} + +MCJIT::MCJIT(std::unique_ptr<Module> M, std::unique_ptr<TargetMachine> TM, + std::shared_ptr<MCJITMemoryManager> MemMgr, + std::shared_ptr<LegacyJITSymbolResolver> Resolver) + : ExecutionEngine(TM->createDataLayout(), std::move(M)), TM(std::move(TM)), + Ctx(nullptr), MemMgr(std::move(MemMgr)), + Resolver(*this, std::move(Resolver)), Dyld(*this->MemMgr, this->Resolver), + ObjCache(nullptr) { + // 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. + // + std::unique_ptr<Module> First = std::move(Modules[0]); + Modules.clear(); + + if (First->getDataLayout().isDefault()) + First->setDataLayout(getDataLayout()); + + OwnedModules.addModule(std::move(First)); + RegisterJITEventListener(JITEventListener::createGDBRegistrationListener()); +} + +MCJIT::~MCJIT() { + std::lock_guard<sys::Mutex> locked(lock); + + Dyld.deregisterEHFrames(); + + for (auto &Obj : LoadedObjects) + if (Obj) + notifyFreeingObject(*Obj); + + Archives.clear(); +} + +void MCJIT::addModule(std::unique_ptr<Module> M) { + std::lock_guard<sys::Mutex> locked(lock); + + if (M->getDataLayout().isDefault()) + M->setDataLayout(getDataLayout()); + + OwnedModules.addModule(std::move(M)); +} + +bool MCJIT::removeModule(Module *M) { + std::lock_guard<sys::Mutex> locked(lock); + return OwnedModules.removeModule(M); +} + +void MCJIT::addObjectFile(std::unique_ptr<object::ObjectFile> Obj) { + std::unique_ptr<RuntimeDyld::LoadedObjectInfo> L = Dyld.loadObject(*Obj); + if (Dyld.hasError()) + report_fatal_error(Dyld.getErrorString()); + + notifyObjectLoaded(*Obj, *L); + + LoadedObjects.push_back(std::move(Obj)); +} + +void MCJIT::addObjectFile(object::OwningBinary<object::ObjectFile> Obj) { + std::unique_ptr<object::ObjectFile> ObjFile; + std::unique_ptr<MemoryBuffer> MemBuf; + std::tie(ObjFile, MemBuf) = Obj.takeBinary(); + addObjectFile(std::move(ObjFile)); + Buffers.push_back(std::move(MemBuf)); +} + +void MCJIT::addArchive(object::OwningBinary<object::Archive> A) { + Archives.push_back(std::move(A)); +} + +void MCJIT::setObjectCache(ObjectCache* NewCache) { + std::lock_guard<sys::Mutex> locked(lock); + ObjCache = NewCache; +} + +std::unique_ptr<MemoryBuffer> MCJIT::emitObject(Module *M) { + assert(M && "Can not emit a null module"); + + std::lock_guard<sys::Mutex> locked(lock); + + // Materialize all globals in the module if they have not been + // materialized already. + cantFail(M->materializeAll()); + + // 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. + + legacy::PassManager PM; + + // The RuntimeDyld will take ownership of this shortly + SmallVector<char, 4096> ObjBufferSV; + raw_svector_ostream ObjStream(ObjBufferSV); + + // Turn the machine code intermediate representation into bytes in memory + // that may be executed. + if (TM->addPassesToEmitMC(PM, Ctx, ObjStream, !getVerifyModules())) + report_fatal_error("Target does not support MC emission!"); + + // Initialize passes. + PM.run(*M); + // Flush the output buffer to get the generated code into memory + + auto CompiledObjBuffer = std::make_unique<SmallVectorMemoryBuffer>( + std::move(ObjBufferSV), /*RequiresNullTerminator=*/false); + + // 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. + MemoryBufferRef MB = CompiledObjBuffer->getMemBufferRef(); + ObjCache->notifyObjectCompiled(M, MB); + } + + return CompiledObjBuffer; +} + +void MCJIT::generateCodeForModule(Module *M) { + // Get a thread lock to make sure we aren't trying to load multiple times + std::lock_guard<sys::Mutex> 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<MemoryBuffer> ObjectToLoad; + // Try to load the pre-compiled object from cache if possible + if (ObjCache) + ObjectToLoad = ObjCache->getObject(M); + + assert(M->getDataLayout() == getDataLayout() && "DataLayout Mismatch"); + + // If the cache did not contain a suitable object, compile the object + if (!ObjectToLoad) { + ObjectToLoad = emitObject(M); + assert(ObjectToLoad && "Compilation did not produce an object."); + } + + // Load the object into the dynamic linker. + // MCJIT now owns the ObjectImage pointer (via its LoadedObjects list). + Expected<std::unique_ptr<object::ObjectFile>> LoadedObject = + object::ObjectFile::createObjectFile(ObjectToLoad->getMemBufferRef()); + if (!LoadedObject) { + std::string Buf; + raw_string_ostream OS(Buf); + logAllUnhandledErrors(LoadedObject.takeError(), OS); + report_fatal_error(Twine(OS.str())); + } + std::unique_ptr<RuntimeDyld::LoadedObjectInfo> L = + Dyld.loadObject(*LoadedObject.get()); + + if (Dyld.hasError()) + report_fatal_error(Dyld.getErrorString()); + + notifyObjectLoaded(*LoadedObject.get(), *L); + + Buffers.push_back(std::move(ObjectToLoad)); + LoadedObjects.push_back(std::move(*LoadedObject)); + + OwnedModules.markModuleAsLoaded(M); +} + +void MCJIT::finalizeLoadedModules() { + std::lock_guard<sys::Mutex> locked(lock); + + // Resolve any outstanding relocations. + Dyld.resolveRelocations(); + + // Check for Dyld error. + if (Dyld.hasError()) + ErrMsg = Dyld.getErrorString().str(); + + OwnedModules.markAllLoadedModulesAsFinalized(); + + // Register EH frame data for any module we own which has been loaded + Dyld.registerEHFrames(); + + // Set page permissions. + MemMgr->finalizeMemory(); +} + +// FIXME: Rename this. +void MCJIT::finalizeObject() { + std::lock_guard<sys::Mutex> locked(lock); + + // Generate code for module is going to move objects out of the 'added' list, + // so we need to copy that out before using it: + SmallVector<Module*, 16> ModsToAdd; + for (auto M : OwnedModules.added()) + ModsToAdd.push_back(M); + + for (auto M : ModsToAdd) + generateCodeForModule(M); + + finalizeLoadedModules(); +} + +void MCJIT::finalizeModule(Module *M) { + std::lock_guard<sys::Mutex> 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(); +} + +JITSymbol MCJIT::findExistingSymbol(const std::string &Name) { + if (void *Addr = getPointerToGlobalIfAvailable(Name)) + return JITSymbol(static_cast<uint64_t>( + reinterpret_cast<uintptr_t>(Addr)), + JITSymbolFlags::Exported); + + return Dyld.getSymbol(Name); +} + +Module *MCJIT::findModuleForSymbol(const std::string &Name, + bool CheckFunctionsOnly) { + StringRef DemangledName = Name; + if (DemangledName[0] == getDataLayout().getGlobalPrefix()) + DemangledName = DemangledName.substr(1); + + std::lock_guard<sys::Mutex> 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(DemangledName); + if (F && !F->isDeclaration()) + return M; + if (!CheckFunctionsOnly) { + GlobalVariable *G = M->getGlobalVariable(DemangledName); + 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) { + std::string MangledName; + { + raw_string_ostream MangledNameStream(MangledName); + Mangler::getNameWithPrefix(MangledNameStream, Name, getDataLayout()); + } + if (auto Sym = findSymbol(MangledName, CheckFunctionsOnly)) { + if (auto AddrOrErr = Sym.getAddress()) + return *AddrOrErr; + else + report_fatal_error(AddrOrErr.takeError()); + } else if (auto Err = Sym.takeError()) + report_fatal_error(Sym.takeError()); + return 0; +} + +JITSymbol MCJIT::findSymbol(const std::string &Name, + bool CheckFunctionsOnly) { + std::lock_guard<sys::Mutex> locked(lock); + + // First, check to see if we already have this symbol. + if (auto Sym = findExistingSymbol(Name)) + return Sym; + + for (object::OwningBinary<object::Archive> &OB : Archives) { + object::Archive *A = OB.getBinary(); + // Look for our symbols in each Archive + auto OptionalChildOrErr = A->findSym(Name); + if (!OptionalChildOrErr) + report_fatal_error(OptionalChildOrErr.takeError()); + auto &OptionalChild = *OptionalChildOrErr; + if (OptionalChild) { + // FIXME: Support nested archives? + Expected<std::unique_ptr<object::Binary>> ChildBinOrErr = + OptionalChild->getAsBinary(); + if (!ChildBinOrErr) { + // TODO: Actually report errors helpfully. + consumeError(ChildBinOrErr.takeError()); + continue; + } + std::unique_ptr<object::Binary> &ChildBin = ChildBinOrErr.get(); + if (ChildBin->isObject()) { + std::unique_ptr<object::ObjectFile> OF( + static_cast<object::ObjectFile *>(ChildBin.release())); + // This causes the object file to be loaded. + addObjectFile(std::move(OF)); + // The address should be here now. + if (auto Sym = findExistingSymbol(Name)) + return Sym; + } + } + } + + // If it hasn't already been generated, see if it's in one of our modules. + Module *M = findModuleForSymbol(Name, CheckFunctionsOnly); + if (M) { + generateCodeForModule(M); + + // Check the RuntimeDyld table again, it should be there now. + return findExistingSymbol(Name); + } + + // If a LazyFunctionCreator is installed, use it to get/create the function. + // FIXME: Should we instead have a LazySymbolCreator callback? + if (LazyFunctionCreator) { + auto Addr = static_cast<uint64_t>( + reinterpret_cast<uintptr_t>(LazyFunctionCreator(Name))); + return JITSymbol(Addr, JITSymbolFlags::Exported); + } + + return nullptr; +} + +uint64_t MCJIT::getGlobalValueAddress(const std::string &Name) { + std::lock_guard<sys::Mutex> locked(lock); + uint64_t Result = getSymbolAddress(Name, false); + if (Result != 0) + finalizeLoadedModules(); + return Result; +} + +uint64_t MCJIT::getFunctionAddress(const std::string &Name) { + std::lock_guard<sys::Mutex> locked(lock); + uint64_t Result = getSymbolAddress(Name, true); + if (Result != 0) + finalizeLoadedModules(); + return Result; +} + +// Deprecated. Use getFunctionAddress instead. +void *MCJIT::getPointerToFunction(Function *F) { + std::lock_guard<sys::Mutex> locked(lock); + + Mangler Mang; + SmallString<128> Name; + TM->getNameWithPrefix(Name, F, Mang); + + if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) { + bool AbortOnFailure = !F->hasExternalWeakLinkage(); + void *Addr = getPointerToNamedFunction(Name, AbortOnFailure); + updateGlobalMapping(F, Addr); + return Addr; + } + + 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. + // FIXME: Asking for the pointer to a function that hasn't been registered, + // and isn't a declaration (which is handled above) should probably + // be an assertion. + 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. + return (void*)Dyld.getSymbol(Name).getAddress(); +} + +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()); +} + +Function *MCJIT::FindFunctionNamedInModulePtrSet(StringRef FnName, + ModulePtrSet::iterator I, + ModulePtrSet::iterator E) { + for (; I != E; ++I) { + Function *F = (*I)->getFunction(FnName); + if (F && !F->isDeclaration()) + return F; + } + return nullptr; +} + +GlobalVariable *MCJIT::FindGlobalVariableNamedInModulePtrSet(StringRef Name, + bool AllowInternal, + ModulePtrSet::iterator I, + ModulePtrSet::iterator E) { + for (; I != E; ++I) { + GlobalVariable *GV = (*I)->getGlobalVariable(Name, AllowInternal); + if (GV && !GV->isDeclaration()) + return GV; + } + return nullptr; +} + + +Function *MCJIT::FindFunctionNamed(StringRef 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; +} + +GlobalVariable *MCJIT::FindGlobalVariableNamed(StringRef Name, bool AllowInternal) { + GlobalVariable *GV = FindGlobalVariableNamedInModulePtrSet( + Name, AllowInternal, OwnedModules.begin_added(), OwnedModules.end_added()); + if (!GV) + GV = FindGlobalVariableNamedInModulePtrSet(Name, AllowInternal, OwnedModules.begin_loaded(), + OwnedModules.end_loaded()); + if (!GV) + GV = FindGlobalVariableNamedInModulePtrSet(Name, AllowInternal, OwnedModules.begin_finalized(), + OwnedModules.end_finalized()); + return GV; +} + +GenericValue MCJIT::runFunction(Function *F, ArrayRef<GenericValue> ArgValues) { + assert(F && "Function *F was null at entry to run()"); + + void *FPtr = getPointerToFunction(F); + finalizeModule(F->getParent()); + assert(FPtr && "Pointer to fn's code was null after getPointerToFunction"); + FunctionType *FTy = F->getFunctionType(); + Type *RetTy = FTy->getReturnType(); + + assert((FTy->getNumParams() == ArgValues.size() || + (FTy->isVarArg() && FTy->getNumParams() <= ArgValues.size())) && + "Wrong number of arguments passed into function!"); + assert(FTy->getNumParams() == ArgValues.size() && + "This doesn't support passing arguments through varargs (yet)!"); + + // Handle some common cases first. These cases correspond to common `main' + // prototypes. + if (RetTy->isIntegerTy(32) || RetTy->isVoidTy()) { + switch (ArgValues.size()) { + case 3: + if (FTy->getParamType(0)->isIntegerTy(32) && + FTy->getParamType(1)->isPointerTy() && + FTy->getParamType(2)->isPointerTy()) { + int (*PF)(int, char **, const char **) = + (int(*)(int, char **, const char **))(intptr_t)FPtr; + + // Call the function. + GenericValue rv; + rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(), + (char **)GVTOP(ArgValues[1]), + (const char **)GVTOP(ArgValues[2]))); + return rv; + } + break; + case 2: + if (FTy->getParamType(0)->isIntegerTy(32) && + FTy->getParamType(1)->isPointerTy()) { + int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr; + + // Call the function. + GenericValue rv; + rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(), + (char **)GVTOP(ArgValues[1]))); + return rv; + } + break; + case 1: + if (FTy->getNumParams() == 1 && + FTy->getParamType(0)->isIntegerTy(32)) { + GenericValue rv; + int (*PF)(int) = (int(*)(int))(intptr_t)FPtr; + rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue())); + return rv; + } + break; + } + } + + // Handle cases where no arguments are passed first. + if (ArgValues.empty()) { + GenericValue rv; + switch (RetTy->getTypeID()) { + default: llvm_unreachable("Unknown return type for function call!"); + case Type::IntegerTyID: { + unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth(); + if (BitWidth == 1) + rv.IntVal = APInt(BitWidth, ((bool(*)())(intptr_t)FPtr)()); + else if (BitWidth <= 8) + rv.IntVal = APInt(BitWidth, ((char(*)())(intptr_t)FPtr)()); + else if (BitWidth <= 16) + rv.IntVal = APInt(BitWidth, ((short(*)())(intptr_t)FPtr)()); + else if (BitWidth <= 32) + rv.IntVal = APInt(BitWidth, ((int(*)())(intptr_t)FPtr)()); + else if (BitWidth <= 64) + rv.IntVal = APInt(BitWidth, ((int64_t(*)())(intptr_t)FPtr)()); + else + llvm_unreachable("Integer types > 64 bits not supported"); + return rv; + } + case Type::VoidTyID: + rv.IntVal = APInt(32, ((int(*)())(intptr_t)FPtr)()); + return rv; + case Type::FloatTyID: + rv.FloatVal = ((float(*)())(intptr_t)FPtr)(); + return rv; + case Type::DoubleTyID: + rv.DoubleVal = ((double(*)())(intptr_t)FPtr)(); + return rv; + case Type::X86_FP80TyID: + case Type::FP128TyID: + case Type::PPC_FP128TyID: + llvm_unreachable("long double not supported yet"); + case Type::PointerTyID: + return PTOGV(((void*(*)())(intptr_t)FPtr)()); + } + } + + report_fatal_error("MCJIT::runFunction does not support full-featured " + "argument passing. Please use " + "ExecutionEngine::getFunctionAddress and cast the result " + "to the desired function pointer type."); +} + +void *MCJIT::getPointerToNamedFunction(StringRef Name, bool AbortOnFailure) { + if (!isSymbolSearchingDisabled()) { + if (auto Sym = Resolver.findSymbol(std::string(Name))) { + if (auto AddrOrErr = Sym.getAddress()) + return reinterpret_cast<void*>( + static_cast<uintptr_t>(*AddrOrErr)); + } else if (auto Err = Sym.takeError()) + report_fatal_error(std::move(Err)); + } + + /// If a LazyFunctionCreator is installed, use it to get/create the function. + if (LazyFunctionCreator) + if (void *RP = LazyFunctionCreator(std::string(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; + std::lock_guard<sys::Mutex> locked(lock); + EventListeners.push_back(L); +} + +void MCJIT::UnregisterJITEventListener(JITEventListener *L) { + if (!L) + return; + std::lock_guard<sys::Mutex> locked(lock); + auto I = find(reverse(EventListeners), L); + if (I != EventListeners.rend()) { + std::swap(*I, EventListeners.back()); + EventListeners.pop_back(); + } +} + +void MCJIT::notifyObjectLoaded(const object::ObjectFile &Obj, + const RuntimeDyld::LoadedObjectInfo &L) { + uint64_t Key = + static_cast<uint64_t>(reinterpret_cast<uintptr_t>(Obj.getData().data())); + std::lock_guard<sys::Mutex> locked(lock); + MemMgr->notifyObjectLoaded(this, Obj); + for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) { + EventListeners[I]->notifyObjectLoaded(Key, Obj, L); + } +} + +void MCJIT::notifyFreeingObject(const object::ObjectFile &Obj) { + uint64_t Key = + static_cast<uint64_t>(reinterpret_cast<uintptr_t>(Obj.getData().data())); + std::lock_guard<sys::Mutex> locked(lock); + for (JITEventListener *L : EventListeners) + L->notifyFreeingObject(Key); +} + +JITSymbol +LinkingSymbolResolver::findSymbol(const std::string &Name) { + auto Result = ParentEngine.findSymbol(Name, false); + if (Result) + return Result; + if (ParentEngine.isSymbolSearchingDisabled()) + return nullptr; + return ClientResolver->findSymbol(Name); +} + +void LinkingSymbolResolver::anchor() {} |