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-rw-r--r--contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp639
-rw-r--r--contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h340
-rw-r--r--contrib/llvm/lib/ExecutionEngine/MCJIT/ObjectBuffer.h48
3 files changed, 1027 insertions, 0 deletions
diff --git a/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
new file mode 100644
index 0000000..f6944ee
--- /dev/null
+++ b/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
@@ -0,0 +1,639 @@
+//===-- MCJIT.cpp - MC-based Just-in-Time Compiler ------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#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/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/MCAsmInfo.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/MutexGuard.h"
+
+using namespace llvm;
+
+void ObjectCache::anchor() {}
+
+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<RuntimeDyld::SymbolResolver> 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<RuntimeDyld::SymbolResolver> Resolver)
+ : ExecutionEngine(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();
+
+ OwnedModules.addModule(std::move(First));
+ setDataLayout(TM->getDataLayout());
+ RegisterJITEventListener(JITEventListener::createGDBRegistrationListener());
+}
+
+MCJIT::~MCJIT() {
+ MutexGuard locked(lock);
+
+ Dyld.deregisterEHFrames();
+
+ for (auto &Obj : LoadedObjects)
+ if (Obj)
+ NotifyFreeingObject(*Obj);
+
+ Archives.clear();
+}
+
+void MCJIT::addModule(std::unique_ptr<Module> M) {
+ MutexGuard locked(lock);
+ OwnedModules.addModule(std::move(M));
+}
+
+bool MCJIT::removeModule(Module *M) {
+ MutexGuard 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());
+
+ NotifyObjectEmitted(*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) {
+ MutexGuard locked(lock);
+ ObjCache = NewCache;
+}
+
+std::unique_ptr<MemoryBuffer> 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.
+
+ 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
+ ObjStream.flush();
+
+ std::unique_ptr<MemoryBuffer> CompiledObjBuffer(
+ new ObjectMemoryBuffer(std::move(ObjBufferSV)));
+
+ // 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
+ 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<MemoryBuffer> ObjectToLoad;
+ // Try to load the pre-compiled object from cache if possible
+ if (ObjCache)
+ ObjectToLoad = ObjCache->getObject(M);
+
+ M->setDataLayout(*TM->getDataLayout());
+
+ // 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).
+ ErrorOr<std::unique_ptr<object::ObjectFile>> LoadedObject =
+ object::ObjectFile::createObjectFile(ObjectToLoad->getMemBufferRef());
+ std::unique_ptr<RuntimeDyld::LoadedObjectInfo> L =
+ Dyld.loadObject(*LoadedObject.get());
+
+ if (Dyld.hasError())
+ report_fatal_error(Dyld.getErrorString());
+
+ NotifyObjectEmitted(*LoadedObject.get(), *L);
+
+ Buffers.push_back(std::move(ObjectToLoad));
+ LoadedObjects.push_back(std::move(*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();
+}
+
+// FIXME: Rename this.
+void MCJIT::finalizeObject() {
+ MutexGuard 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) {
+ 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();
+}
+
+RuntimeDyld::SymbolInfo MCJIT::findExistingSymbol(const std::string &Name) {
+ SmallString<128> FullName;
+ Mangler::getNameWithPrefix(FullName, Name, *TM->getDataLayout());
+
+ if (void *Addr = getPointerToGlobalIfAvailable(FullName))
+ return RuntimeDyld::SymbolInfo(static_cast<uint64_t>(
+ reinterpret_cast<uintptr_t>(Addr)),
+ JITSymbolFlags::Exported);
+
+ return Dyld.getSymbol(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) {
+ return findSymbol(Name, CheckFunctionsOnly).getAddress();
+}
+
+RuntimeDyld::SymbolInfo MCJIT::findSymbol(const std::string &Name,
+ bool CheckFunctionsOnly) {
+ MutexGuard 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
+ object::Archive::child_iterator ChildIt = A->findSym(Name);
+ if (ChildIt != A->child_end()) {
+ // FIXME: Support nested archives?
+ ErrorOr<std::unique_ptr<object::Binary>> ChildBinOrErr =
+ ChildIt->getAsBinary();
+ if (ChildBinOrErr.getError())
+ 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 RuntimeDyld::SymbolInfo(Addr, JITSymbolFlags::Exported);
+ }
+
+ return nullptr;
+}
+
+uint64_t MCJIT::getGlobalValueAddress(const std::string &Name) {
+ MutexGuard locked(lock);
+ uint64_t Result = getSymbolAddress(Name, false);
+ if (Result != 0)
+ finalizeLoadedModules();
+ return Result;
+}
+
+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);
+
+ 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(const char *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(const char *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(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;
+}
+
+GlobalVariable *MCJIT::FindGlobalVariableNamed(const char *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);
+ 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)());
+ }
+ }
+
+ llvm_unreachable("Full-featured argument passing not supported yet!");
+}
+
+void *MCJIT::getPointerToNamedFunction(StringRef Name, bool AbortOnFailure) {
+ if (!isSymbolSearchingDisabled()) {
+ void *ptr =
+ reinterpret_cast<void*>(
+ static_cast<uintptr_t>(Resolver.findSymbol(Name).getAddress()));
+ 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 object::ObjectFile& Obj,
+ const RuntimeDyld::LoadedObjectInfo &L) {
+ MutexGuard locked(lock);
+ MemMgr->notifyObjectLoaded(this, Obj);
+ for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
+ EventListeners[I]->NotifyObjectEmitted(Obj, L);
+ }
+}
+
+void MCJIT::NotifyFreeingObject(const object::ObjectFile& Obj) {
+ MutexGuard locked(lock);
+ for (JITEventListener *L : EventListeners)
+ L->NotifyFreeingObject(Obj);
+}
+
+RuntimeDyld::SymbolInfo
+LinkingSymbolResolver::findSymbol(const std::string &Name) {
+ auto Result = ParentEngine.findSymbol(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.findSymbol(Name.substr(1), false);
+ if (Result)
+ return Result;
+ if (ParentEngine.isSymbolSearchingDisabled())
+ return nullptr;
+ return ClientResolver->findSymbol(Name);
+}
diff --git a/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h b/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
new file mode 100644
index 0000000..a45173c
--- /dev/null
+++ b/contrib/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
@@ -0,0 +1,340 @@
+//===-- MCJIT.h - Class definition for the MCJIT ----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_EXECUTIONENGINE_MCJIT_MCJIT_H
+#define LLVM_LIB_EXECUTIONENGINE_MCJIT_MCJIT_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/ObjectCache.h"
+#include "llvm/ExecutionEngine/ObjectMemoryBuffer.h"
+#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
+#include "llvm/IR/Module.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 LinkingSymbolResolver : public RuntimeDyld::SymbolResolver {
+public:
+ LinkingSymbolResolver(MCJIT &Parent,
+ std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver)
+ : ParentEngine(Parent), ClientResolver(std::move(Resolver)) {}
+
+ RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override;
+
+ // MCJIT doesn't support logical dylibs.
+ RuntimeDyld::SymbolInfo
+ findSymbolInLogicalDylib(const std::string &Name) override {
+ return nullptr;
+ }
+
+private:
+ MCJIT &ParentEngine;
+ std::shared_ptr<RuntimeDyld::SymbolResolver> ClientResolver;
+};
+
+// About Module states: added->loaded->finalized.
+//
+// The purpose of the "added" state is having modules in standby. (added=known
+// but not compiled). The idea is that you can add a module to provide function
+// definitions but if nothing in that module is referenced by a module in which
+// a function is executed (note the wording here because it's not exactly the
+// ideal case) then the module never gets compiled. This is sort of lazy
+// compilation.
+//
+// The purpose of the "loaded" state (loaded=compiled and required sections
+// copied into local memory but not yet ready for execution) is to have an
+// intermediate state wherein clients can remap the addresses of sections, using
+// MCJIT::mapSectionAddress, (in preparation for later copying to a new location
+// or an external process) before relocations and page permissions are applied.
+//
+// It might not be obvious at first glance, but the "remote-mcjit" case in the
+// lli tool does this. In that case, the intermediate action is taken by the
+// RemoteMemoryManager in response to the notifyObjectLoaded function being
+// called.
+
+class MCJIT : public ExecutionEngine {
+ MCJIT(std::unique_ptr<Module> M, std::unique_ptr<TargetMachine> tm,
+ std::shared_ptr<MCJITMemoryManager> MemMgr,
+ std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver);
+
+ typedef llvm::SmallPtrSet<Module *, 4> ModulePtrSet;
+
+ class OwningModuleContainer {
+ public:
+ OwningModuleContainer() {
+ }
+ ~OwningModuleContainer() {
+ freeModulePtrSet(AddedModules);
+ freeModulePtrSet(LoadedModules);
+ freeModulePtrSet(FinalizedModules);
+ }
+
+ ModulePtrSet::iterator begin_added() { return AddedModules.begin(); }
+ ModulePtrSet::iterator end_added() { return AddedModules.end(); }
+ iterator_range<ModulePtrSet::iterator> added() {
+ return iterator_range<ModulePtrSet::iterator>(begin_added(), end_added());
+ }
+
+ ModulePtrSet::iterator begin_loaded() { return LoadedModules.begin(); }
+ ModulePtrSet::iterator end_loaded() { return LoadedModules.end(); }
+
+ ModulePtrSet::iterator begin_finalized() { return FinalizedModules.begin(); }
+ ModulePtrSet::iterator end_finalized() { return FinalizedModules.end(); }
+
+ void addModule(std::unique_ptr<Module> M) {
+ AddedModules.insert(M.release());
+ }
+
+ bool removeModule(Module *M) {
+ return AddedModules.erase(M) || LoadedModules.erase(M) ||
+ FinalizedModules.erase(M);
+ }
+
+ bool hasModuleBeenAddedButNotLoaded(Module *M) {
+ return AddedModules.count(M) != 0;
+ }
+
+ bool hasModuleBeenLoaded(Module *M) {
+ // If the module is in either the "loaded" or "finalized" sections it
+ // has been loaded.
+ return (LoadedModules.count(M) != 0 ) || (FinalizedModules.count(M) != 0);
+ }
+
+ bool hasModuleBeenFinalized(Module *M) {
+ return FinalizedModules.count(M) != 0;
+ }
+
+ bool ownsModule(Module* M) {
+ return (AddedModules.count(M) != 0) || (LoadedModules.count(M) != 0) ||
+ (FinalizedModules.count(M) != 0);
+ }
+
+ void markModuleAsLoaded(Module *M) {
+ // This checks against logic errors in the MCJIT implementation.
+ // This function should never be called with either a Module that MCJIT
+ // does not own or a Module that has already been loaded and/or finalized.
+ assert(AddedModules.count(M) &&
+ "markModuleAsLoaded: Module not found in AddedModules");
+
+ // Remove the module from the "Added" set.
+ AddedModules.erase(M);
+
+ // Add the Module to the "Loaded" set.
+ LoadedModules.insert(M);
+ }
+
+ void markModuleAsFinalized(Module *M) {
+ // This checks against logic errors in the MCJIT implementation.
+ // This function should never be called with either a Module that MCJIT
+ // does not own, a Module that has not been loaded or a Module that has
+ // already been finalized.
+ assert(LoadedModules.count(M) &&
+ "markModuleAsFinalized: Module not found in LoadedModules");
+
+ // Remove the module from the "Loaded" section of the list.
+ LoadedModules.erase(M);
+
+ // Add the Module to the "Finalized" section of the list by inserting it
+ // before the 'end' iterator.
+ FinalizedModules.insert(M);
+ }
+
+ void markAllLoadedModulesAsFinalized() {
+ for (ModulePtrSet::iterator I = LoadedModules.begin(),
+ E = LoadedModules.end();
+ I != E; ++I) {
+ Module *M = *I;
+ FinalizedModules.insert(M);
+ }
+ LoadedModules.clear();
+ }
+
+ private:
+ ModulePtrSet AddedModules;
+ ModulePtrSet LoadedModules;
+ ModulePtrSet FinalizedModules;
+
+ void freeModulePtrSet(ModulePtrSet& MPS) {
+ // Go through the module set and delete everything.
+ for (ModulePtrSet::iterator I = MPS.begin(), E = MPS.end(); I != E; ++I) {
+ Module *M = *I;
+ delete M;
+ }
+ MPS.clear();
+ }
+ };
+
+ std::unique_ptr<TargetMachine> TM;
+ MCContext *Ctx;
+ std::shared_ptr<MCJITMemoryManager> MemMgr;
+ LinkingSymbolResolver Resolver;
+ RuntimeDyld Dyld;
+ std::vector<JITEventListener*> EventListeners;
+
+ OwningModuleContainer OwnedModules;
+
+ SmallVector<object::OwningBinary<object::Archive>, 2> Archives;
+ SmallVector<std::unique_ptr<MemoryBuffer>, 2> Buffers;
+
+ SmallVector<std::unique_ptr<object::ObjectFile>, 2> 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;
+
+ Function *FindFunctionNamedInModulePtrSet(const char *FnName,
+ ModulePtrSet::iterator I,
+ ModulePtrSet::iterator E);
+
+ GlobalVariable *FindGlobalVariableNamedInModulePtrSet(const char *Name,
+ bool AllowInternal,
+ ModulePtrSet::iterator I,
+ ModulePtrSet::iterator E);
+
+ void runStaticConstructorsDestructorsInModulePtrSet(bool isDtors,
+ ModulePtrSet::iterator I,
+ ModulePtrSet::iterator E);
+
+public:
+ ~MCJIT() override;
+
+ /// @name ExecutionEngine interface implementation
+ /// @{
+ void addModule(std::unique_ptr<Module> M) override;
+ void addObjectFile(std::unique_ptr<object::ObjectFile> O) override;
+ void addObjectFile(object::OwningBinary<object::ObjectFile> O) override;
+ void addArchive(object::OwningBinary<object::Archive> O) override;
+ bool removeModule(Module *M) override;
+
+ /// FindFunctionNamed - Search all of the active modules to find the function that
+ /// defines FnName. This is very slow operation and shouldn't be used for
+ /// general code.
+ virtual Function *FindFunctionNamed(const char *FnName) override;
+
+ /// FindGlobalVariableNamed - Search all of the active modules to find the global variable
+ /// that defines Name. This is very slow operation and shouldn't be used for
+ /// general code.
+ virtual GlobalVariable *FindGlobalVariableNamed(const char *Name, bool AllowInternal = false) override;
+
+ /// Sets the object manager that MCJIT should use to avoid compilation.
+ void setObjectCache(ObjectCache *manager) override;
+
+ void setProcessAllSections(bool ProcessAllSections) override {
+ Dyld.setProcessAllSections(ProcessAllSections);
+ }
+
+ void generateCodeForModule(Module *M) override;
+
+ /// 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.
+ /// Is it OK to finalize a set of modules, add modules and finalize again.
+ // FIXME: Do we really need both of these?
+ void finalizeObject() override;
+ virtual void finalizeModule(Module *);
+ void finalizeLoadedModules();
+
+ /// runStaticConstructorsDestructors - This method is used to execute all of
+ /// the static constructors or destructors for a program.
+ ///
+ /// \param isDtors - Run the destructors instead of constructors.
+ void runStaticConstructorsDestructors(bool isDtors) override;
+
+ void *getPointerToFunction(Function *F) override;
+
+ GenericValue runFunction(Function *F,
+ ArrayRef<GenericValue> ArgValues) override;
+
+ /// getPointerToNamedFunction - This method returns the address of the
+ /// specified function by using the dlsym function call. As such it is only
+ /// useful for resolving library symbols, not code generated symbols.
+ ///
+ /// If AbortOnFailure is false and no function with the given name is
+ /// found, this function silently returns a null pointer. Otherwise,
+ /// it prints a message to stderr and aborts.
+ ///
+ void *getPointerToNamedFunction(StringRef Name,
+ bool AbortOnFailure = true) override;
+
+ /// 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.
+ void mapSectionAddress(const void *LocalAddress,
+ uint64_t TargetAddress) override {
+ Dyld.mapSectionAddress(LocalAddress, TargetAddress);
+ }
+ void RegisterJITEventListener(JITEventListener *L) override;
+ void UnregisterJITEventListener(JITEventListener *L) override;
+
+ // If successful, these function will implicitly finalize all loaded objects.
+ // To get a function address within MCJIT without causing a finalize, use
+ // getSymbolAddress.
+ uint64_t getGlobalValueAddress(const std::string &Name) override;
+ uint64_t getFunctionAddress(const std::string &Name) override;
+
+ TargetMachine *getTargetMachine() override { return TM.get(); }
+
+ /// @}
+ /// @name (Private) Registration Interfaces
+ /// @{
+
+ static void Register() {
+ MCJITCtor = createJIT;
+ }
+
+ static ExecutionEngine*
+ createJIT(std::unique_ptr<Module> M,
+ std::string *ErrorStr,
+ std::shared_ptr<MCJITMemoryManager> MemMgr,
+ std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
+ std::unique_ptr<TargetMachine> TM);
+
+ // @}
+
+ RuntimeDyld::SymbolInfo findSymbol(const std::string &Name,
+ bool CheckFunctionsOnly);
+ // DEPRECATED - Please use findSymbol instead.
+ // 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.
+ std::unique_ptr<MemoryBuffer> emitObject(Module *M);
+
+ void NotifyObjectEmitted(const object::ObjectFile& Obj,
+ const RuntimeDyld::LoadedObjectInfo &L);
+ void NotifyFreeingObject(const object::ObjectFile& Obj);
+
+ RuntimeDyld::SymbolInfo findExistingSymbol(const std::string &Name);
+ Module *findModuleForSymbol(const std::string &Name,
+ bool CheckFunctionsOnly);
+};
+
+} // End llvm namespace
+
+#endif
diff --git a/contrib/llvm/lib/ExecutionEngine/MCJIT/ObjectBuffer.h b/contrib/llvm/lib/ExecutionEngine/MCJIT/ObjectBuffer.h
new file mode 100644
index 0000000..92310f3
--- /dev/null
+++ b/contrib/llvm/lib/ExecutionEngine/MCJIT/ObjectBuffer.h
@@ -0,0 +1,48 @@
+//===--- ObjectBuffer.h - Utility class to wrap object memory ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares a wrapper class to hold the memory into which an
+// object will be generated.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_OBJECTBUFFER_H
+#define LLVM_EXECUTIONENGINE_OBJECTBUFFER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+
+class ObjectMemoryBuffer : public MemoryBuffer {
+public:
+ template <unsigned N>
+ ObjectMemoryBuffer(SmallVector<char, N> SV)
+ : SV(SV), BufferName("<in-memory object>") {
+ init(this->SV.begin(), this->SV.end(), false);
+ }
+
+ template <unsigned N>
+ ObjectMemoryBuffer(SmallVector<char, N> SV, StringRef Name)
+ : SV(SV), BufferName(Name) {
+ init(this->SV.begin(), this->SV.end(), false);
+ }
+ const char* getBufferIdentifier() const override { return BufferName.c_str(); }
+
+ BufferKind getBufferKind() const override { return MemoryBuffer_Malloc; }
+
+private:
+ SmallVector<char, 4096> SV;
+ std::string BufferName;
+};
+
+} // namespace llvm
+
+#endif
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