| //===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This utility provides a simple wrapper around the LLVM Execution Engines, |
| // which allow the direct execution of LLVM programs through a Just-In-Time |
| // compiler, or through an interpreter if no JIT is available for this platform. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "OrcLazyJIT.h" |
| #include "RemoteJITUtils.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/Bitcode/ReaderWriter.h" |
| #include "llvm/CodeGen/LinkAllCodegenComponents.h" |
| #include "llvm/ExecutionEngine/GenericValue.h" |
| #include "llvm/ExecutionEngine/Interpreter.h" |
| #include "llvm/ExecutionEngine/JITEventListener.h" |
| #include "llvm/ExecutionEngine/MCJIT.h" |
| #include "llvm/ExecutionEngine/ObjectCache.h" |
| #include "llvm/ExecutionEngine/OrcMCJITReplacement.h" |
| #include "llvm/ExecutionEngine/SectionMemoryManager.h" |
| #include "llvm/ExecutionEngine/Orc/OrcRemoteTargetClient.h" |
| #include "llvm/IR/IRBuilder.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/IR/Type.h" |
| #include "llvm/IR/TypeBuilder.h" |
| #include "llvm/IRReader/IRReader.h" |
| #include "llvm/Object/Archive.h" |
| #include "llvm/Object/ObjectFile.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/DynamicLibrary.h" |
| #include "llvm/Support/Format.h" |
| #include "llvm/Support/ManagedStatic.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/Memory.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/Path.h" |
| #include "llvm/Support/PluginLoader.h" |
| #include "llvm/Support/PrettyStackTrace.h" |
| #include "llvm/Support/Process.h" |
| #include "llvm/Support/Program.h" |
| #include "llvm/Support/Signals.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/TargetSelect.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/Transforms/Instrumentation.h" |
| #include <cerrno> |
| |
| #ifdef __CYGWIN__ |
| #include <cygwin/version.h> |
| #if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007 |
| #define DO_NOTHING_ATEXIT 1 |
| #endif |
| #endif |
| |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "lli" |
| |
| namespace { |
| |
| enum class JITKind { MCJIT, OrcMCJITReplacement, OrcLazy }; |
| |
| cl::opt<std::string> |
| InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-")); |
| |
| cl::list<std::string> |
| InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>...")); |
| |
| cl::opt<bool> ForceInterpreter("force-interpreter", |
| cl::desc("Force interpretation: disable JIT"), |
| cl::init(false)); |
| |
| cl::opt<JITKind> UseJITKind("jit-kind", |
| cl::desc("Choose underlying JIT kind."), |
| cl::init(JITKind::MCJIT), |
| cl::values( |
| clEnumValN(JITKind::MCJIT, "mcjit", |
| "MCJIT"), |
| clEnumValN(JITKind::OrcMCJITReplacement, |
| "orc-mcjit", |
| "Orc-based MCJIT replacement"), |
| clEnumValN(JITKind::OrcLazy, |
| "orc-lazy", |
| "Orc-based lazy JIT."), |
| clEnumValEnd)); |
| |
| // The MCJIT supports building for a target address space separate from |
| // the JIT compilation process. Use a forked process and a copying |
| // memory manager with IPC to execute using this functionality. |
| cl::opt<bool> RemoteMCJIT("remote-mcjit", |
| cl::desc("Execute MCJIT'ed code in a separate process."), |
| cl::init(false)); |
| |
| // Manually specify the child process for remote execution. This overrides |
| // the simulated remote execution that allocates address space for child |
| // execution. The child process will be executed and will communicate with |
| // lli via stdin/stdout pipes. |
| cl::opt<std::string> |
| ChildExecPath("mcjit-remote-process", |
| cl::desc("Specify the filename of the process to launch " |
| "for remote MCJIT execution. If none is specified," |
| "\n\tremote execution will be simulated in-process."), |
| cl::value_desc("filename"), cl::init("")); |
| |
| // Determine optimization level. |
| cl::opt<char> |
| OptLevel("O", |
| cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " |
| "(default = '-O2')"), |
| cl::Prefix, |
| cl::ZeroOrMore, |
| cl::init(' ')); |
| |
| cl::opt<std::string> |
| TargetTriple("mtriple", cl::desc("Override target triple for module")); |
| |
| cl::opt<std::string> |
| MArch("march", |
| cl::desc("Architecture to generate assembly for (see --version)")); |
| |
| cl::opt<std::string> |
| MCPU("mcpu", |
| cl::desc("Target a specific cpu type (-mcpu=help for details)"), |
| cl::value_desc("cpu-name"), |
| cl::init("")); |
| |
| cl::list<std::string> |
| MAttrs("mattr", |
| cl::CommaSeparated, |
| cl::desc("Target specific attributes (-mattr=help for details)"), |
| cl::value_desc("a1,+a2,-a3,...")); |
| |
| cl::opt<std::string> |
| EntryFunc("entry-function", |
| cl::desc("Specify the entry function (default = 'main') " |
| "of the executable"), |
| cl::value_desc("function"), |
| cl::init("main")); |
| |
| cl::list<std::string> |
| ExtraModules("extra-module", |
| cl::desc("Extra modules to be loaded"), |
| cl::value_desc("input bitcode")); |
| |
| cl::list<std::string> |
| ExtraObjects("extra-object", |
| cl::desc("Extra object files to be loaded"), |
| cl::value_desc("input object")); |
| |
| cl::list<std::string> |
| ExtraArchives("extra-archive", |
| cl::desc("Extra archive files to be loaded"), |
| cl::value_desc("input archive")); |
| |
| cl::opt<bool> |
| EnableCacheManager("enable-cache-manager", |
| cl::desc("Use cache manager to save/load mdoules"), |
| cl::init(false)); |
| |
| cl::opt<std::string> |
| ObjectCacheDir("object-cache-dir", |
| cl::desc("Directory to store cached object files " |
| "(must be user writable)"), |
| cl::init("")); |
| |
| cl::opt<std::string> |
| FakeArgv0("fake-argv0", |
| cl::desc("Override the 'argv[0]' value passed into the executing" |
| " program"), cl::value_desc("executable")); |
| |
| cl::opt<bool> |
| DisableCoreFiles("disable-core-files", cl::Hidden, |
| cl::desc("Disable emission of core files if possible")); |
| |
| cl::opt<bool> |
| NoLazyCompilation("disable-lazy-compilation", |
| cl::desc("Disable JIT lazy compilation"), |
| cl::init(false)); |
| |
| cl::opt<Reloc::Model> |
| RelocModel("relocation-model", |
| cl::desc("Choose relocation model"), |
| cl::init(Reloc::Default), |
| cl::values( |
| clEnumValN(Reloc::Default, "default", |
| "Target default relocation model"), |
| clEnumValN(Reloc::Static, "static", |
| "Non-relocatable code"), |
| clEnumValN(Reloc::PIC_, "pic", |
| "Fully relocatable, position independent code"), |
| clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", |
| "Relocatable external references, non-relocatable code"), |
| clEnumValEnd)); |
| |
| cl::opt<llvm::CodeModel::Model> |
| CMModel("code-model", |
| cl::desc("Choose code model"), |
| cl::init(CodeModel::JITDefault), |
| cl::values(clEnumValN(CodeModel::JITDefault, "default", |
| "Target default JIT code model"), |
| clEnumValN(CodeModel::Small, "small", |
| "Small code model"), |
| clEnumValN(CodeModel::Kernel, "kernel", |
| "Kernel code model"), |
| clEnumValN(CodeModel::Medium, "medium", |
| "Medium code model"), |
| clEnumValN(CodeModel::Large, "large", |
| "Large code model"), |
| clEnumValEnd)); |
| |
| cl::opt<bool> |
| GenerateSoftFloatCalls("soft-float", |
| cl::desc("Generate software floating point library calls"), |
| cl::init(false)); |
| |
| cl::opt<llvm::FloatABI::ABIType> |
| FloatABIForCalls("float-abi", |
| cl::desc("Choose float ABI type"), |
| cl::init(FloatABI::Default), |
| cl::values( |
| clEnumValN(FloatABI::Default, "default", |
| "Target default float ABI type"), |
| clEnumValN(FloatABI::Soft, "soft", |
| "Soft float ABI (implied by -soft-float)"), |
| clEnumValN(FloatABI::Hard, "hard", |
| "Hard float ABI (uses FP registers)"), |
| clEnumValEnd)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Object cache |
| // |
| // This object cache implementation writes cached objects to disk to the |
| // directory specified by CacheDir, using a filename provided in the module |
| // descriptor. The cache tries to load a saved object using that path if the |
| // file exists. CacheDir defaults to "", in which case objects are cached |
| // alongside their originating bitcodes. |
| // |
| class LLIObjectCache : public ObjectCache { |
| public: |
| LLIObjectCache(const std::string& CacheDir) : CacheDir(CacheDir) { |
| // Add trailing '/' to cache dir if necessary. |
| if (!this->CacheDir.empty() && |
| this->CacheDir[this->CacheDir.size() - 1] != '/') |
| this->CacheDir += '/'; |
| } |
| ~LLIObjectCache() override {} |
| |
| void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override { |
| const std::string ModuleID = M->getModuleIdentifier(); |
| std::string CacheName; |
| if (!getCacheFilename(ModuleID, CacheName)) |
| return; |
| if (!CacheDir.empty()) { // Create user-defined cache dir. |
| SmallString<128> dir(sys::path::parent_path(CacheName)); |
| sys::fs::create_directories(Twine(dir)); |
| } |
| std::error_code EC; |
| raw_fd_ostream outfile(CacheName, EC, sys::fs::F_None); |
| outfile.write(Obj.getBufferStart(), Obj.getBufferSize()); |
| outfile.close(); |
| } |
| |
| std::unique_ptr<MemoryBuffer> getObject(const Module* M) override { |
| const std::string ModuleID = M->getModuleIdentifier(); |
| std::string CacheName; |
| if (!getCacheFilename(ModuleID, CacheName)) |
| return nullptr; |
| // Load the object from the cache filename |
| ErrorOr<std::unique_ptr<MemoryBuffer>> IRObjectBuffer = |
| MemoryBuffer::getFile(CacheName.c_str(), -1, false); |
| // If the file isn't there, that's OK. |
| if (!IRObjectBuffer) |
| return nullptr; |
| // MCJIT will want to write into this buffer, and we don't want that |
| // because the file has probably just been mmapped. Instead we make |
| // a copy. The filed-based buffer will be released when it goes |
| // out of scope. |
| return MemoryBuffer::getMemBufferCopy(IRObjectBuffer.get()->getBuffer()); |
| } |
| |
| private: |
| std::string CacheDir; |
| |
| bool getCacheFilename(const std::string &ModID, std::string &CacheName) { |
| std::string Prefix("file:"); |
| size_t PrefixLength = Prefix.length(); |
| if (ModID.substr(0, PrefixLength) != Prefix) |
| return false; |
| std::string CacheSubdir = ModID.substr(PrefixLength); |
| #if defined(_WIN32) |
| // Transform "X:\foo" => "/X\foo" for convenience. |
| if (isalpha(CacheSubdir[0]) && CacheSubdir[1] == ':') { |
| CacheSubdir[1] = CacheSubdir[0]; |
| CacheSubdir[0] = '/'; |
| } |
| #endif |
| CacheName = CacheDir + CacheSubdir; |
| size_t pos = CacheName.rfind('.'); |
| CacheName.replace(pos, CacheName.length() - pos, ".o"); |
| return true; |
| } |
| }; |
| |
| static ExecutionEngine *EE = nullptr; |
| static LLIObjectCache *CacheManager = nullptr; |
| |
| static void do_shutdown() { |
| // Cygwin-1.5 invokes DLL's dtors before atexit handler. |
| #ifndef DO_NOTHING_ATEXIT |
| delete EE; |
| if (CacheManager) |
| delete CacheManager; |
| llvm_shutdown(); |
| #endif |
| } |
| |
| // On Mingw and Cygwin, an external symbol named '__main' is called from the |
| // generated 'main' function to allow static intialization. To avoid linking |
| // problems with remote targets (because lli's remote target support does not |
| // currently handle external linking) we add a secondary module which defines |
| // an empty '__main' function. |
| static void addCygMingExtraModule(ExecutionEngine *EE, |
| LLVMContext &Context, |
| StringRef TargetTripleStr) { |
| IRBuilder<> Builder(Context); |
| Triple TargetTriple(TargetTripleStr); |
| |
| // Create a new module. |
| std::unique_ptr<Module> M = make_unique<Module>("CygMingHelper", Context); |
| M->setTargetTriple(TargetTripleStr); |
| |
| // Create an empty function named "__main". |
| Function *Result; |
| if (TargetTriple.isArch64Bit()) { |
| Result = Function::Create( |
| TypeBuilder<int64_t(void), false>::get(Context), |
| GlobalValue::ExternalLinkage, "__main", M.get()); |
| } else { |
| Result = Function::Create( |
| TypeBuilder<int32_t(void), false>::get(Context), |
| GlobalValue::ExternalLinkage, "__main", M.get()); |
| } |
| BasicBlock *BB = BasicBlock::Create(Context, "__main", Result); |
| Builder.SetInsertPoint(BB); |
| Value *ReturnVal; |
| if (TargetTriple.isArch64Bit()) |
| ReturnVal = ConstantInt::get(Context, APInt(64, 0)); |
| else |
| ReturnVal = ConstantInt::get(Context, APInt(32, 0)); |
| Builder.CreateRet(ReturnVal); |
| |
| // Add this new module to the ExecutionEngine. |
| EE->addModule(std::move(M)); |
| } |
| |
| CodeGenOpt::Level getOptLevel() { |
| switch (OptLevel) { |
| default: |
| errs() << "lli: Invalid optimization level.\n"; |
| exit(1); |
| case '0': return CodeGenOpt::None; |
| case '1': return CodeGenOpt::Less; |
| case ' ': |
| case '2': return CodeGenOpt::Default; |
| case '3': return CodeGenOpt::Aggressive; |
| } |
| llvm_unreachable("Unrecognized opt level."); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // main Driver function |
| // |
| int main(int argc, char **argv, char * const *envp) { |
| sys::PrintStackTraceOnErrorSignal(); |
| PrettyStackTraceProgram X(argc, argv); |
| |
| LLVMContext &Context = getGlobalContext(); |
| atexit(do_shutdown); // Call llvm_shutdown() on exit. |
| |
| // If we have a native target, initialize it to ensure it is linked in and |
| // usable by the JIT. |
| InitializeNativeTarget(); |
| InitializeNativeTargetAsmPrinter(); |
| InitializeNativeTargetAsmParser(); |
| |
| cl::ParseCommandLineOptions(argc, argv, |
| "llvm interpreter & dynamic compiler\n"); |
| |
| // If the user doesn't want core files, disable them. |
| if (DisableCoreFiles) |
| sys::Process::PreventCoreFiles(); |
| |
| // Load the bitcode... |
| SMDiagnostic Err; |
| std::unique_ptr<Module> Owner = parseIRFile(InputFile, Err, Context); |
| Module *Mod = Owner.get(); |
| if (!Mod) { |
| Err.print(argv[0], errs()); |
| return 1; |
| } |
| |
| if (UseJITKind == JITKind::OrcLazy) |
| return runOrcLazyJIT(std::move(Owner), argc, argv); |
| |
| if (EnableCacheManager) { |
| std::string CacheName("file:"); |
| CacheName.append(InputFile); |
| Mod->setModuleIdentifier(CacheName); |
| } |
| |
| // If not jitting lazily, load the whole bitcode file eagerly too. |
| if (NoLazyCompilation) { |
| if (std::error_code EC = Mod->materializeAll()) { |
| errs() << argv[0] << ": bitcode didn't read correctly.\n"; |
| errs() << "Reason: " << EC.message() << "\n"; |
| exit(1); |
| } |
| } |
| |
| std::string ErrorMsg; |
| EngineBuilder builder(std::move(Owner)); |
| builder.setMArch(MArch); |
| builder.setMCPU(MCPU); |
| builder.setMAttrs(MAttrs); |
| builder.setRelocationModel(RelocModel); |
| builder.setCodeModel(CMModel); |
| builder.setErrorStr(&ErrorMsg); |
| builder.setEngineKind(ForceInterpreter |
| ? EngineKind::Interpreter |
| : EngineKind::JIT); |
| builder.setUseOrcMCJITReplacement(UseJITKind == JITKind::OrcMCJITReplacement); |
| |
| // If we are supposed to override the target triple, do so now. |
| if (!TargetTriple.empty()) |
| Mod->setTargetTriple(Triple::normalize(TargetTriple)); |
| |
| // Enable MCJIT if desired. |
| RTDyldMemoryManager *RTDyldMM = nullptr; |
| if (!ForceInterpreter) { |
| if (RemoteMCJIT) |
| RTDyldMM = new ForwardingMemoryManager(); |
| else |
| RTDyldMM = new SectionMemoryManager(); |
| |
| // Deliberately construct a temp std::unique_ptr to pass in. Do not null out |
| // RTDyldMM: We still use it below, even though we don't own it. |
| builder.setMCJITMemoryManager( |
| std::unique_ptr<RTDyldMemoryManager>(RTDyldMM)); |
| } else if (RemoteMCJIT) { |
| errs() << "error: Remote process execution does not work with the " |
| "interpreter.\n"; |
| exit(1); |
| } |
| |
| builder.setOptLevel(getOptLevel()); |
| |
| TargetOptions Options; |
| if (FloatABIForCalls != FloatABI::Default) |
| Options.FloatABIType = FloatABIForCalls; |
| |
| builder.setTargetOptions(Options); |
| |
| EE = builder.create(); |
| if (!EE) { |
| if (!ErrorMsg.empty()) |
| errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n"; |
| else |
| errs() << argv[0] << ": unknown error creating EE!\n"; |
| exit(1); |
| } |
| |
| if (EnableCacheManager) { |
| CacheManager = new LLIObjectCache(ObjectCacheDir); |
| EE->setObjectCache(CacheManager); |
| } |
| |
| // Load any additional modules specified on the command line. |
| for (unsigned i = 0, e = ExtraModules.size(); i != e; ++i) { |
| std::unique_ptr<Module> XMod = parseIRFile(ExtraModules[i], Err, Context); |
| if (!XMod) { |
| Err.print(argv[0], errs()); |
| return 1; |
| } |
| if (EnableCacheManager) { |
| std::string CacheName("file:"); |
| CacheName.append(ExtraModules[i]); |
| XMod->setModuleIdentifier(CacheName); |
| } |
| EE->addModule(std::move(XMod)); |
| } |
| |
| for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) { |
| ErrorOr<object::OwningBinary<object::ObjectFile>> Obj = |
| object::ObjectFile::createObjectFile(ExtraObjects[i]); |
| if (!Obj) { |
| Err.print(argv[0], errs()); |
| return 1; |
| } |
| object::OwningBinary<object::ObjectFile> &O = Obj.get(); |
| EE->addObjectFile(std::move(O)); |
| } |
| |
| for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) { |
| ErrorOr<std::unique_ptr<MemoryBuffer>> ArBufOrErr = |
| MemoryBuffer::getFileOrSTDIN(ExtraArchives[i]); |
| if (!ArBufOrErr) { |
| Err.print(argv[0], errs()); |
| return 1; |
| } |
| std::unique_ptr<MemoryBuffer> &ArBuf = ArBufOrErr.get(); |
| |
| ErrorOr<std::unique_ptr<object::Archive>> ArOrErr = |
| object::Archive::create(ArBuf->getMemBufferRef()); |
| if (std::error_code EC = ArOrErr.getError()) { |
| errs() << EC.message(); |
| return 1; |
| } |
| std::unique_ptr<object::Archive> &Ar = ArOrErr.get(); |
| |
| object::OwningBinary<object::Archive> OB(std::move(Ar), std::move(ArBuf)); |
| |
| EE->addArchive(std::move(OB)); |
| } |
| |
| // If the target is Cygwin/MingW and we are generating remote code, we |
| // need an extra module to help out with linking. |
| if (RemoteMCJIT && Triple(Mod->getTargetTriple()).isOSCygMing()) { |
| addCygMingExtraModule(EE, Context, Mod->getTargetTriple()); |
| } |
| |
| // The following functions have no effect if their respective profiling |
| // support wasn't enabled in the build configuration. |
| EE->RegisterJITEventListener( |
| JITEventListener::createOProfileJITEventListener()); |
| EE->RegisterJITEventListener( |
| JITEventListener::createIntelJITEventListener()); |
| |
| if (!NoLazyCompilation && RemoteMCJIT) { |
| errs() << "warning: remote mcjit does not support lazy compilation\n"; |
| NoLazyCompilation = true; |
| } |
| EE->DisableLazyCompilation(NoLazyCompilation); |
| |
| // If the user specifically requested an argv[0] to pass into the program, |
| // do it now. |
| if (!FakeArgv0.empty()) { |
| InputFile = static_cast<std::string>(FakeArgv0); |
| } else { |
| // Otherwise, if there is a .bc suffix on the executable strip it off, it |
| // might confuse the program. |
| if (StringRef(InputFile).endswith(".bc")) |
| InputFile.erase(InputFile.length() - 3); |
| } |
| |
| // Add the module's name to the start of the vector of arguments to main(). |
| InputArgv.insert(InputArgv.begin(), InputFile); |
| |
| // Call the main function from M as if its signature were: |
| // int main (int argc, char **argv, const char **envp) |
| // using the contents of Args to determine argc & argv, and the contents of |
| // EnvVars to determine envp. |
| // |
| Function *EntryFn = Mod->getFunction(EntryFunc); |
| if (!EntryFn) { |
| errs() << '\'' << EntryFunc << "\' function not found in module.\n"; |
| return -1; |
| } |
| |
| // Reset errno to zero on entry to main. |
| errno = 0; |
| |
| int Result; |
| |
| // Sanity check use of remote-jit: LLI currently only supports use of the |
| // remote JIT on Unix platforms. |
| if (RemoteMCJIT) { |
| #ifndef LLVM_ON_UNIX |
| errs() << "Warning: host does not support external remote targets.\n" |
| << " Defaulting to local execution execution\n"; |
| return -1; |
| #else |
| if (ChildExecPath.empty()) { |
| errs() << "-remote-mcjit requires -mcjit-remote-process.\n"; |
| exit(1); |
| } else if (!sys::fs::can_execute(ChildExecPath)) { |
| errs() << "Unable to find usable child executable: '" << ChildExecPath |
| << "'\n"; |
| return -1; |
| } |
| #endif |
| } |
| |
| if (!RemoteMCJIT) { |
| // If the program doesn't explicitly call exit, we will need the Exit |
| // function later on to make an explicit call, so get the function now. |
| Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context), |
| Type::getInt32Ty(Context), |
| nullptr); |
| |
| // Run static constructors. |
| if (!ForceInterpreter) { |
| // Give MCJIT a chance to apply relocations and set page permissions. |
| EE->finalizeObject(); |
| } |
| EE->runStaticConstructorsDestructors(false); |
| |
| // Trigger compilation separately so code regions that need to be |
| // invalidated will be known. |
| (void)EE->getPointerToFunction(EntryFn); |
| // Clear instruction cache before code will be executed. |
| if (RTDyldMM) |
| static_cast<SectionMemoryManager*>(RTDyldMM)->invalidateInstructionCache(); |
| |
| // Run main. |
| Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp); |
| |
| // Run static destructors. |
| EE->runStaticConstructorsDestructors(true); |
| |
| // If the program didn't call exit explicitly, we should call it now. |
| // This ensures that any atexit handlers get called correctly. |
| if (Function *ExitF = dyn_cast<Function>(Exit)) { |
| std::vector<GenericValue> Args; |
| GenericValue ResultGV; |
| ResultGV.IntVal = APInt(32, Result); |
| Args.push_back(ResultGV); |
| EE->runFunction(ExitF, Args); |
| errs() << "ERROR: exit(" << Result << ") returned!\n"; |
| abort(); |
| } else { |
| errs() << "ERROR: exit defined with wrong prototype!\n"; |
| abort(); |
| } |
| } else { |
| // else == "if (RemoteMCJIT)" |
| |
| // Remote target MCJIT doesn't (yet) support static constructors. No reason |
| // it couldn't. This is a limitation of the LLI implemantation, not the |
| // MCJIT itself. FIXME. |
| |
| // Lanch the remote process and get a channel to it. |
| std::unique_ptr<FDRPCChannel> C = launchRemote(); |
| if (!C) { |
| errs() << "Failed to launch remote JIT.\n"; |
| exit(1); |
| } |
| |
| // Create a remote target client running over the channel. |
| typedef orc::remote::OrcRemoteTargetClient<orc::remote::RPCChannel> MyRemote; |
| ErrorOr<MyRemote> R = MyRemote::Create(*C); |
| if (!R) { |
| errs() << "Could not create remote: " << R.getError().message() << "\n"; |
| exit(1); |
| } |
| |
| // Create a remote memory manager. |
| std::unique_ptr<MyRemote::RCMemoryManager> RemoteMM; |
| if (auto EC = R->createRemoteMemoryManager(RemoteMM)) { |
| errs() << "Could not create remote memory manager: " << EC.message() << "\n"; |
| exit(1); |
| } |
| |
| // Forward MCJIT's memory manager calls to the remote memory manager. |
| static_cast<ForwardingMemoryManager*>(RTDyldMM)->setMemMgr( |
| std::move(RemoteMM)); |
| |
| // Forward MCJIT's symbol resolution calls to the remote. |
| static_cast<ForwardingMemoryManager*>(RTDyldMM)->setResolver( |
| orc::createLambdaResolver( |
| [&](const std::string &Name) { |
| orc::TargetAddress Addr = 0; |
| if (auto EC = R->getSymbolAddress(Addr, Name)) { |
| errs() << "Failure during symbol lookup: " << EC.message() << "\n"; |
| exit(1); |
| } |
| return RuntimeDyld::SymbolInfo(Addr, JITSymbolFlags::Exported); |
| }, |
| [](const std::string &Name) { return nullptr; } |
| )); |
| |
| // Grab the target address of the JIT'd main function on the remote and call |
| // it. |
| // FIXME: argv and envp handling. |
| orc::TargetAddress Entry = EE->getFunctionAddress(EntryFn->getName().str()); |
| EE->finalizeObject(); |
| DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at 0x" |
| << format("%llx", Entry) << "\n"); |
| if (auto EC = R->callIntVoid(Result, Entry)) |
| errs() << "ERROR: " << EC.message() << "\n"; |
| |
| // Like static constructors, the remote target MCJIT support doesn't handle |
| // this yet. It could. FIXME. |
| |
| // Delete the EE - we need to tear it down *before* we terminate the session |
| // with the remote, otherwise it'll crash when it tries to release resources |
| // on a remote that has already been disconnected. |
| delete EE; |
| EE = nullptr; |
| |
| // Signal the remote target that we're done JITing. |
| R->terminateSession(); |
| } |
| |
| return Result; |
| } |
| |
| std::unique_ptr<FDRPCChannel> launchRemote() { |
| #ifndef LLVM_ON_UNIX |
| llvm_unreachable("launchRemote not supported on non-Unix platforms"); |
| #else |
| int PipeFD[2][2]; |
| pid_t ChildPID; |
| |
| // Create two pipes. |
| if (pipe(PipeFD[0]) != 0 || pipe(PipeFD[1]) != 0) |
| perror("Error creating pipe: "); |
| |
| ChildPID = fork(); |
| |
| if (ChildPID == 0) { |
| // In the child... |
| |
| // Close the parent ends of the pipes |
| close(PipeFD[0][1]); |
| close(PipeFD[1][0]); |
| |
| |
| // Execute the child process. |
| std::unique_ptr<char[]> ChildPath, ChildIn, ChildOut; |
| { |
| ChildPath.reset(new char[ChildExecPath.size() + 1]); |
| std::copy(ChildExecPath.begin(), ChildExecPath.end(), &ChildPath[0]); |
| ChildPath[ChildExecPath.size()] = '\0'; |
| std::string ChildInStr = std::to_string(PipeFD[0][0]); |
| ChildIn.reset(new char[ChildInStr.size() + 1]); |
| std::copy(ChildInStr.begin(), ChildInStr.end(), &ChildIn[0]); |
| ChildIn[ChildInStr.size()] = '\0'; |
| std::string ChildOutStr = std::to_string(PipeFD[1][1]); |
| ChildOut.reset(new char[ChildOutStr.size() + 1]); |
| std::copy(ChildOutStr.begin(), ChildOutStr.end(), &ChildOut[0]); |
| ChildOut[ChildOutStr.size()] = '\0'; |
| } |
| |
| char * const args[] = { &ChildPath[0], &ChildIn[0], &ChildOut[0], nullptr }; |
| int rc = execv(ChildExecPath.c_str(), args); |
| if (rc != 0) |
| perror("Error executing child process: "); |
| llvm_unreachable("Error executing child process"); |
| } |
| // else we're the parent... |
| |
| // Close the child ends of the pipes |
| close(PipeFD[0][0]); |
| close(PipeFD[1][1]); |
| |
| // Return an RPC channel connected to our end of the pipes. |
| return llvm::make_unique<FDRPCChannel>(PipeFD[1][0], PipeFD[0][1]); |
| #endif |
| } |
