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We only need to pass in a DataLayout when mangling a raw string, not when constructing the mangler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240405 91177308-0d34-0410-b5e6-96231b3b80d8
164 lines
5.7 KiB
C++
164 lines
5.7 KiB
C++
//===--- OrcLazyJIT.h - Basic Orc-based JIT for lazy execution --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Simple Orc-based JIT. Uses the compile-on-demand layer to break up and
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// lazily compile modules.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLI_ORCLAZYJIT_H
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#define LLVM_TOOLS_LLI_ORCLAZYJIT_H
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#include "llvm/ADT/Triple.h"
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#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
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#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
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#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
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#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
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#include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
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#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
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#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
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#include "llvm/IR/LLVMContext.h"
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namespace llvm {
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class OrcLazyJIT {
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public:
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typedef orc::JITCompileCallbackManagerBase CompileCallbackMgr;
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typedef orc::ObjectLinkingLayer<> ObjLayerT;
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typedef orc::IRCompileLayer<ObjLayerT> CompileLayerT;
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typedef std::function<std::unique_ptr<Module>(std::unique_ptr<Module>)>
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TransformFtor;
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typedef orc::IRTransformLayer<CompileLayerT, TransformFtor> IRDumpLayerT;
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typedef orc::CompileOnDemandLayer<IRDumpLayerT, CompileCallbackMgr> CODLayerT;
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typedef CODLayerT::ModuleSetHandleT ModuleHandleT;
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typedef std::function<
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std::unique_ptr<CompileCallbackMgr>(IRDumpLayerT&,
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RuntimeDyld::MemoryManager&,
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LLVMContext&)>
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CallbackManagerBuilder;
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static CallbackManagerBuilder createCallbackManagerBuilder(Triple T);
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OrcLazyJIT(std::unique_ptr<TargetMachine> TM, LLVMContext &Context,
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CallbackManagerBuilder &BuildCallbackMgr)
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: TM(std::move(TM)),
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ObjectLayer(),
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CompileLayer(ObjectLayer, orc::SimpleCompiler(*this->TM)),
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IRDumpLayer(CompileLayer, createDebugDumper()),
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CCMgr(BuildCallbackMgr(IRDumpLayer, CCMgrMemMgr, Context)),
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CODLayer(IRDumpLayer, *CCMgr, false),
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CXXRuntimeOverrides([this](const std::string &S) { return mangle(S); }) {}
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~OrcLazyJIT() {
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// Run any destructors registered with __cxa_atexit.
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CXXRuntimeOverrides.runDestructors();
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// Run any IR destructors.
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for (auto &DtorRunner : IRStaticDestructorRunners)
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DtorRunner.runViaLayer(CODLayer);
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}
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template <typename PtrTy>
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static PtrTy fromTargetAddress(orc::TargetAddress Addr) {
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return reinterpret_cast<PtrTy>(static_cast<uintptr_t>(Addr));
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}
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ModuleHandleT addModule(std::unique_ptr<Module> M) {
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// Attach a data-layout if one isn't already present.
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if (M->getDataLayout().isDefault())
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M->setDataLayout(*TM->getDataLayout());
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// Record the static constructors and destructors. We have to do this before
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// we hand over ownership of the module to the JIT.
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std::vector<std::string> CtorNames, DtorNames;
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for (auto Ctor : orc::getConstructors(*M))
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CtorNames.push_back(mangle(Ctor.Func->getName()));
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for (auto Dtor : orc::getDestructors(*M))
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DtorNames.push_back(mangle(Dtor.Func->getName()));
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// Symbol resolution order:
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// 1) Search the JIT symbols.
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// 2) Check for C++ runtime overrides.
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// 3) Search the host process (LLI)'s symbol table.
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std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver =
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orc::createLambdaResolver(
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[this](const std::string &Name) {
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if (auto Sym = CODLayer.findSymbol(Name, true))
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return RuntimeDyld::SymbolInfo(Sym.getAddress(),
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Sym.getFlags());
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if (auto Sym = CXXRuntimeOverrides.searchOverrides(Name))
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return Sym;
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if (auto Addr =
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RTDyldMemoryManager::getSymbolAddressInProcess(Name))
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return RuntimeDyld::SymbolInfo(Addr, JITSymbolFlags::Exported);
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return RuntimeDyld::SymbolInfo(nullptr);
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},
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[](const std::string &Name) {
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return RuntimeDyld::SymbolInfo(nullptr);
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}
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);
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// Add the module to the JIT.
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std::vector<std::unique_ptr<Module>> S;
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S.push_back(std::move(M));
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auto H = CODLayer.addModuleSet(std::move(S), nullptr, std::move(Resolver));
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// Run the static constructors, and save the static destructor runner for
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// execution when the JIT is torn down.
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orc::CtorDtorRunner<CODLayerT> CtorRunner(std::move(CtorNames), H);
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CtorRunner.runViaLayer(CODLayer);
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IRStaticDestructorRunners.emplace_back(std::move(DtorNames), H);
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return H;
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}
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orc::JITSymbol findSymbol(const std::string &Name) {
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return CODLayer.findSymbol(mangle(Name), true);
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}
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orc::JITSymbol findSymbolIn(ModuleHandleT H, const std::string &Name) {
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return CODLayer.findSymbolIn(H, mangle(Name), true);
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}
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private:
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std::string mangle(const std::string &Name) {
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std::string MangledName;
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{
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raw_string_ostream MangledNameStream(MangledName);
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Mangler::getNameWithPrefix(MangledNameStream, Name, *TM->getDataLayout());
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}
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return MangledName;
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}
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static TransformFtor createDebugDumper();
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std::unique_ptr<TargetMachine> TM;
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SectionMemoryManager CCMgrMemMgr;
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ObjLayerT ObjectLayer;
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CompileLayerT CompileLayer;
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IRDumpLayerT IRDumpLayer;
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std::unique_ptr<CompileCallbackMgr> CCMgr;
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CODLayerT CODLayer;
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orc::LocalCXXRuntimeOverrides CXXRuntimeOverrides;
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std::vector<orc::CtorDtorRunner<CODLayerT>> IRStaticDestructorRunners;
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};
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int runOrcLazyJIT(std::unique_ptr<Module> M, int ArgC, char* ArgV[]);
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} // end namespace llvm
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#endif
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