1 //===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This utility provides a simple wrapper around the LLVM Execution Engines,
10 // which allow the direct execution of LLVM programs through a Just-In-Time
11 // compiler, or through an interpreter if no JIT is available for this platform.
13 //===----------------------------------------------------------------------===//
15 #include "RemoteJITUtils.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/ADT/Triple.h"
18 #include "llvm/Bitcode/BitcodeReader.h"
19 #include "llvm/CodeGen/CommandFlags.h"
20 #include "llvm/CodeGen/LinkAllCodegenComponents.h"
21 #include "llvm/Config/llvm-config.h"
22 #include "llvm/ExecutionEngine/GenericValue.h"
23 #include "llvm/ExecutionEngine/Interpreter.h"
24 #include "llvm/ExecutionEngine/JITEventListener.h"
25 #include "llvm/ExecutionEngine/MCJIT.h"
26 #include "llvm/ExecutionEngine/ObjectCache.h"
27 #include "llvm/ExecutionEngine/Orc/DebugUtils.h"
28 #include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
29 #include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
30 #include "llvm/ExecutionEngine/Orc/LLJIT.h"
31 #include "llvm/ExecutionEngine/Orc/MachOPlatform.h"
32 #include "llvm/ExecutionEngine/Orc/OrcRemoteTargetClient.h"
33 #include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
34 #include "llvm/ExecutionEngine/OrcMCJITReplacement.h"
35 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
36 #include "llvm/IR/IRBuilder.h"
37 #include "llvm/IR/LLVMContext.h"
38 #include "llvm/IR/Module.h"
39 #include "llvm/IR/Type.h"
40 #include "llvm/IR/Verifier.h"
41 #include "llvm/IRReader/IRReader.h"
42 #include "llvm/Object/Archive.h"
43 #include "llvm/Object/ObjectFile.h"
44 #include "llvm/Support/CommandLine.h"
45 #include "llvm/Support/Debug.h"
46 #include "llvm/Support/DynamicLibrary.h"
47 #include "llvm/Support/Format.h"
48 #include "llvm/Support/InitLLVM.h"
49 #include "llvm/Support/ManagedStatic.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Support/Memory.h"
52 #include "llvm/Support/MemoryBuffer.h"
53 #include "llvm/Support/Path.h"
54 #include "llvm/Support/PluginLoader.h"
55 #include "llvm/Support/Process.h"
56 #include "llvm/Support/Program.h"
57 #include "llvm/Support/SourceMgr.h"
58 #include "llvm/Support/TargetSelect.h"
59 #include "llvm/Support/WithColor.h"
60 #include "llvm/Support/raw_ostream.h"
61 #include "llvm/Transforms/Instrumentation.h"
65 #include <cygwin/version.h>
66 #if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
67 #define DO_NOTHING_ATEXIT 1
73 static codegen::RegisterCodeGenFlags CGF;
75 #define DEBUG_TYPE "lli"
79 enum class JITKind { MCJIT, OrcMCJITReplacement, OrcLazy };
82 InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
85 InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
87 cl::opt<bool> ForceInterpreter("force-interpreter",
88 cl::desc("Force interpretation: disable JIT"),
91 cl::opt<JITKind> UseJITKind(
92 "jit-kind", cl::desc("Choose underlying JIT kind."),
93 cl::init(JITKind::MCJIT),
94 cl::values(clEnumValN(JITKind::MCJIT, "mcjit", "MCJIT"),
95 clEnumValN(JITKind::OrcMCJITReplacement, "orc-mcjit",
96 "Orc-based MCJIT replacement "
98 clEnumValN(JITKind::OrcLazy, "orc-lazy",
99 "Orc-based lazy JIT.")));
102 LazyJITCompileThreads("compile-threads",
103 cl::desc("Choose the number of compile threads "
104 "(jit-kind=orc-lazy only)"),
107 cl::list<std::string>
108 ThreadEntryPoints("thread-entry",
109 cl::desc("calls the given entry-point on a new thread "
110 "(jit-kind=orc-lazy only)"));
112 cl::opt<bool> PerModuleLazy(
114 cl::desc("Performs lazy compilation on whole module boundaries "
115 "rather than individual functions"),
118 cl::list<std::string>
120 cl::desc("Specifies the JITDylib to be used for any subsequent "
121 "-extra-module arguments."));
123 cl::list<std::string>
124 Dylibs("dlopen", cl::desc("Dynamic libraries to load before linking"),
127 // The MCJIT supports building for a target address space separate from
128 // the JIT compilation process. Use a forked process and a copying
129 // memory manager with IPC to execute using this functionality.
130 cl::opt<bool> RemoteMCJIT("remote-mcjit",
131 cl::desc("Execute MCJIT'ed code in a separate process."),
134 // Manually specify the child process for remote execution. This overrides
135 // the simulated remote execution that allocates address space for child
136 // execution. The child process will be executed and will communicate with
137 // lli via stdin/stdout pipes.
139 ChildExecPath("mcjit-remote-process",
140 cl::desc("Specify the filename of the process to launch "
141 "for remote MCJIT execution. If none is specified,"
142 "\n\tremote execution will be simulated in-process."),
143 cl::value_desc("filename"), cl::init(""));
145 // Determine optimization level.
148 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
149 "(default = '-O2')"),
155 TargetTriple("mtriple", cl::desc("Override target triple for module"));
158 EntryFunc("entry-function",
159 cl::desc("Specify the entry function (default = 'main') "
160 "of the executable"),
161 cl::value_desc("function"),
164 cl::list<std::string>
165 ExtraModules("extra-module",
166 cl::desc("Extra modules to be loaded"),
167 cl::value_desc("input bitcode"));
169 cl::list<std::string>
170 ExtraObjects("extra-object",
171 cl::desc("Extra object files to be loaded"),
172 cl::value_desc("input object"));
174 cl::list<std::string>
175 ExtraArchives("extra-archive",
176 cl::desc("Extra archive files to be loaded"),
177 cl::value_desc("input archive"));
180 EnableCacheManager("enable-cache-manager",
181 cl::desc("Use cache manager to save/load modules"),
185 ObjectCacheDir("object-cache-dir",
186 cl::desc("Directory to store cached object files "
187 "(must be user writable)"),
191 FakeArgv0("fake-argv0",
192 cl::desc("Override the 'argv[0]' value passed into the executing"
193 " program"), cl::value_desc("executable"));
196 DisableCoreFiles("disable-core-files", cl::Hidden,
197 cl::desc("Disable emission of core files if possible"));
200 NoLazyCompilation("disable-lazy-compilation",
201 cl::desc("Disable JIT lazy compilation"),
205 GenerateSoftFloatCalls("soft-float",
206 cl::desc("Generate software floating point library calls"),
209 cl::opt<bool> NoProcessSymbols(
211 cl::desc("Do not resolve lli process symbols in JIT'd code"),
214 enum class LLJITPlatform { DetectHost, GenericIR, MachO };
216 cl::opt<LLJITPlatform>
217 Platform("lljit-platform", cl::desc("Platform to use with LLJIT"),
218 cl::init(LLJITPlatform::DetectHost),
219 cl::values(clEnumValN(LLJITPlatform::DetectHost, "DetectHost",
220 "Select based on JIT target triple"),
221 clEnumValN(LLJITPlatform::GenericIR, "GenericIR",
222 "Use LLJITGenericIRPlatform"),
223 clEnumValN(LLJITPlatform::MachO, "MachO",
224 "Use LLJITMachOPlatform")),
227 enum class DumpKind {
234 cl::opt<DumpKind> OrcDumpKind(
235 "orc-lazy-debug", cl::desc("Debug dumping for the orc-lazy JIT."),
236 cl::init(DumpKind::NoDump),
237 cl::values(clEnumValN(DumpKind::NoDump, "no-dump",
238 "Don't dump anything."),
239 clEnumValN(DumpKind::DumpFuncsToStdOut, "funcs-to-stdout",
240 "Dump function names to stdout."),
241 clEnumValN(DumpKind::DumpModsToStdOut, "mods-to-stdout",
242 "Dump modules to stdout."),
243 clEnumValN(DumpKind::DumpModsToDisk, "mods-to-disk",
244 "Dump modules to the current "
245 "working directory. (WARNING: "
246 "will overwrite existing files).")),
249 ExitOnError ExitOnErr;
252 //===----------------------------------------------------------------------===//
255 // This object cache implementation writes cached objects to disk to the
256 // directory specified by CacheDir, using a filename provided in the module
257 // descriptor. The cache tries to load a saved object using that path if the
258 // file exists. CacheDir defaults to "", in which case objects are cached
259 // alongside their originating bitcodes.
261 class LLIObjectCache : public ObjectCache {
263 LLIObjectCache(const std::string& CacheDir) : CacheDir(CacheDir) {
264 // Add trailing '/' to cache dir if necessary.
265 if (!this->CacheDir.empty() &&
266 this->CacheDir[this->CacheDir.size() - 1] != '/')
267 this->CacheDir += '/';
269 ~LLIObjectCache() override {}
271 void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
272 const std::string &ModuleID = M->getModuleIdentifier();
273 std::string CacheName;
274 if (!getCacheFilename(ModuleID, CacheName))
276 if (!CacheDir.empty()) { // Create user-defined cache dir.
277 SmallString<128> dir(sys::path::parent_path(CacheName));
278 sys::fs::create_directories(Twine(dir));
282 raw_fd_ostream outfile(CacheName, EC, sys::fs::OF_None);
283 outfile.write(Obj.getBufferStart(), Obj.getBufferSize());
287 std::unique_ptr<MemoryBuffer> getObject(const Module* M) override {
288 const std::string &ModuleID = M->getModuleIdentifier();
289 std::string CacheName;
290 if (!getCacheFilename(ModuleID, CacheName))
292 // Load the object from the cache filename
293 ErrorOr<std::unique_ptr<MemoryBuffer>> IRObjectBuffer =
294 MemoryBuffer::getFile(CacheName, -1, false);
295 // If the file isn't there, that's OK.
298 // MCJIT will want to write into this buffer, and we don't want that
299 // because the file has probably just been mmapped. Instead we make
300 // a copy. The filed-based buffer will be released when it goes
302 return MemoryBuffer::getMemBufferCopy(IRObjectBuffer.get()->getBuffer());
306 std::string CacheDir;
308 bool getCacheFilename(const std::string &ModID, std::string &CacheName) {
309 std::string Prefix("file:");
310 size_t PrefixLength = Prefix.length();
311 if (ModID.substr(0, PrefixLength) != Prefix)
314 std::string CacheSubdir = ModID.substr(PrefixLength);
316 // Transform "X:\foo" => "/X\foo" for convenience.
317 if (isalpha(CacheSubdir[0]) && CacheSubdir[1] == ':') {
318 CacheSubdir[1] = CacheSubdir[0];
319 CacheSubdir[0] = '/';
323 CacheName = CacheDir + CacheSubdir;
324 size_t pos = CacheName.rfind('.');
325 CacheName.replace(pos, CacheName.length() - pos, ".o");
330 // On Mingw and Cygwin, an external symbol named '__main' is called from the
331 // generated 'main' function to allow static initialization. To avoid linking
332 // problems with remote targets (because lli's remote target support does not
333 // currently handle external linking) we add a secondary module which defines
334 // an empty '__main' function.
335 static void addCygMingExtraModule(ExecutionEngine &EE, LLVMContext &Context,
336 StringRef TargetTripleStr) {
337 IRBuilder<> Builder(Context);
338 Triple TargetTriple(TargetTripleStr);
340 // Create a new module.
341 std::unique_ptr<Module> M = std::make_unique<Module>("CygMingHelper", Context);
342 M->setTargetTriple(TargetTripleStr);
344 // Create an empty function named "__main".
346 if (TargetTriple.isArch64Bit())
347 ReturnTy = Type::getInt64Ty(Context);
349 ReturnTy = Type::getInt32Ty(Context);
351 Function::Create(FunctionType::get(ReturnTy, {}, false),
352 GlobalValue::ExternalLinkage, "__main", M.get());
354 BasicBlock *BB = BasicBlock::Create(Context, "__main", Result);
355 Builder.SetInsertPoint(BB);
356 Value *ReturnVal = ConstantInt::get(ReturnTy, 0);
357 Builder.CreateRet(ReturnVal);
359 // Add this new module to the ExecutionEngine.
360 EE.addModule(std::move(M));
363 CodeGenOpt::Level getOptLevel() {
366 WithColor::error(errs(), "lli") << "invalid optimization level.\n";
368 case '0': return CodeGenOpt::None;
369 case '1': return CodeGenOpt::Less;
371 case '2': return CodeGenOpt::Default;
372 case '3': return CodeGenOpt::Aggressive;
374 llvm_unreachable("Unrecognized opt level.");
377 LLVM_ATTRIBUTE_NORETURN
378 static void reportError(SMDiagnostic Err, const char *ProgName) {
379 Err.print(ProgName, errs());
384 int runOrcLazyJIT(const char *ProgName);
385 void disallowOrcOptions();
387 //===----------------------------------------------------------------------===//
388 // main Driver function
390 int main(int argc, char **argv, char * const *envp) {
391 InitLLVM X(argc, argv);
394 ExitOnErr.setBanner(std::string(argv[0]) + ": ");
396 // If we have a native target, initialize it to ensure it is linked in and
397 // usable by the JIT.
398 InitializeNativeTarget();
399 InitializeNativeTargetAsmPrinter();
400 InitializeNativeTargetAsmParser();
402 cl::ParseCommandLineOptions(argc, argv,
403 "llvm interpreter & dynamic compiler\n");
405 // If the user doesn't want core files, disable them.
406 if (DisableCoreFiles)
407 sys::Process::PreventCoreFiles();
409 ExitOnErr(loadDylibs());
411 if (UseJITKind == JITKind::OrcLazy)
412 return runOrcLazyJIT(argv[0]);
414 disallowOrcOptions();
418 // Load the bitcode...
420 std::unique_ptr<Module> Owner = parseIRFile(InputFile, Err, Context);
421 Module *Mod = Owner.get();
423 reportError(Err, argv[0]);
425 if (EnableCacheManager) {
426 std::string CacheName("file:");
427 CacheName.append(InputFile);
428 Mod->setModuleIdentifier(CacheName);
431 // If not jitting lazily, load the whole bitcode file eagerly too.
432 if (NoLazyCompilation) {
433 // Use *argv instead of argv[0] to work around a wrong GCC warning.
434 ExitOnError ExitOnErr(std::string(*argv) +
435 ": bitcode didn't read correctly: ");
436 ExitOnErr(Mod->materializeAll());
439 std::string ErrorMsg;
440 EngineBuilder builder(std::move(Owner));
441 builder.setMArch(codegen::getMArch());
442 builder.setMCPU(codegen::getCPUStr());
443 builder.setMAttrs(codegen::getFeatureList());
444 if (auto RM = codegen::getExplicitRelocModel())
445 builder.setRelocationModel(RM.getValue());
446 if (auto CM = codegen::getExplicitCodeModel())
447 builder.setCodeModel(CM.getValue());
448 builder.setErrorStr(&ErrorMsg);
449 builder.setEngineKind(ForceInterpreter
450 ? EngineKind::Interpreter
452 builder.setUseOrcMCJITReplacement(AcknowledgeORCv1Deprecation,
453 UseJITKind == JITKind::OrcMCJITReplacement);
455 // If we are supposed to override the target triple, do so now.
456 if (!TargetTriple.empty())
457 Mod->setTargetTriple(Triple::normalize(TargetTriple));
459 // Enable MCJIT if desired.
460 RTDyldMemoryManager *RTDyldMM = nullptr;
461 if (!ForceInterpreter) {
463 RTDyldMM = new ForwardingMemoryManager();
465 RTDyldMM = new SectionMemoryManager();
467 // Deliberately construct a temp std::unique_ptr to pass in. Do not null out
468 // RTDyldMM: We still use it below, even though we don't own it.
469 builder.setMCJITMemoryManager(
470 std::unique_ptr<RTDyldMemoryManager>(RTDyldMM));
471 } else if (RemoteMCJIT) {
472 WithColor::error(errs(), argv[0])
473 << "remote process execution does not work with the interpreter.\n";
477 builder.setOptLevel(getOptLevel());
479 TargetOptions Options = codegen::InitTargetOptionsFromCodeGenFlags();
480 if (codegen::getFloatABIForCalls() != FloatABI::Default)
481 Options.FloatABIType = codegen::getFloatABIForCalls();
483 builder.setTargetOptions(Options);
485 std::unique_ptr<ExecutionEngine> EE(builder.create());
487 if (!ErrorMsg.empty())
488 WithColor::error(errs(), argv[0])
489 << "error creating EE: " << ErrorMsg << "\n";
491 WithColor::error(errs(), argv[0]) << "unknown error creating EE!\n";
495 std::unique_ptr<LLIObjectCache> CacheManager;
496 if (EnableCacheManager) {
497 CacheManager.reset(new LLIObjectCache(ObjectCacheDir));
498 EE->setObjectCache(CacheManager.get());
501 // Load any additional modules specified on the command line.
502 for (unsigned i = 0, e = ExtraModules.size(); i != e; ++i) {
503 std::unique_ptr<Module> XMod = parseIRFile(ExtraModules[i], Err, Context);
505 reportError(Err, argv[0]);
506 if (EnableCacheManager) {
507 std::string CacheName("file:");
508 CacheName.append(ExtraModules[i]);
509 XMod->setModuleIdentifier(CacheName);
511 EE->addModule(std::move(XMod));
514 for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) {
515 Expected<object::OwningBinary<object::ObjectFile>> Obj =
516 object::ObjectFile::createObjectFile(ExtraObjects[i]);
518 // TODO: Actually report errors helpfully.
519 consumeError(Obj.takeError());
520 reportError(Err, argv[0]);
522 object::OwningBinary<object::ObjectFile> &O = Obj.get();
523 EE->addObjectFile(std::move(O));
526 for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) {
527 ErrorOr<std::unique_ptr<MemoryBuffer>> ArBufOrErr =
528 MemoryBuffer::getFileOrSTDIN(ExtraArchives[i]);
530 reportError(Err, argv[0]);
531 std::unique_ptr<MemoryBuffer> &ArBuf = ArBufOrErr.get();
533 Expected<std::unique_ptr<object::Archive>> ArOrErr =
534 object::Archive::create(ArBuf->getMemBufferRef());
537 raw_string_ostream OS(Buf);
538 logAllUnhandledErrors(ArOrErr.takeError(), OS);
543 std::unique_ptr<object::Archive> &Ar = ArOrErr.get();
545 object::OwningBinary<object::Archive> OB(std::move(Ar), std::move(ArBuf));
547 EE->addArchive(std::move(OB));
550 // If the target is Cygwin/MingW and we are generating remote code, we
551 // need an extra module to help out with linking.
552 if (RemoteMCJIT && Triple(Mod->getTargetTriple()).isOSCygMing()) {
553 addCygMingExtraModule(*EE, Context, Mod->getTargetTriple());
556 // The following functions have no effect if their respective profiling
557 // support wasn't enabled in the build configuration.
558 EE->RegisterJITEventListener(
559 JITEventListener::createOProfileJITEventListener());
560 EE->RegisterJITEventListener(
561 JITEventListener::createIntelJITEventListener());
563 EE->RegisterJITEventListener(
564 JITEventListener::createPerfJITEventListener());
566 if (!NoLazyCompilation && RemoteMCJIT) {
567 WithColor::warning(errs(), argv[0])
568 << "remote mcjit does not support lazy compilation\n";
569 NoLazyCompilation = true;
571 EE->DisableLazyCompilation(NoLazyCompilation);
573 // If the user specifically requested an argv[0] to pass into the program,
575 if (!FakeArgv0.empty()) {
576 InputFile = static_cast<std::string>(FakeArgv0);
578 // Otherwise, if there is a .bc suffix on the executable strip it off, it
579 // might confuse the program.
580 if (StringRef(InputFile).endswith(".bc"))
581 InputFile.erase(InputFile.length() - 3);
584 // Add the module's name to the start of the vector of arguments to main().
585 InputArgv.insert(InputArgv.begin(), InputFile);
587 // Call the main function from M as if its signature were:
588 // int main (int argc, char **argv, const char **envp)
589 // using the contents of Args to determine argc & argv, and the contents of
590 // EnvVars to determine envp.
592 Function *EntryFn = Mod->getFunction(EntryFunc);
594 WithColor::error(errs(), argv[0])
595 << '\'' << EntryFunc << "\' function not found in module.\n";
599 // Reset errno to zero on entry to main.
604 // Sanity check use of remote-jit: LLI currently only supports use of the
605 // remote JIT on Unix platforms.
608 WithColor::warning(errs(), argv[0])
609 << "host does not support external remote targets.\n";
610 WithColor::note() << "defaulting to local execution\n";
613 if (ChildExecPath.empty()) {
614 WithColor::error(errs(), argv[0])
615 << "-remote-mcjit requires -mcjit-remote-process.\n";
617 } else if (!sys::fs::can_execute(ChildExecPath)) {
618 WithColor::error(errs(), argv[0])
619 << "unable to find usable child executable: '" << ChildExecPath
627 // If the program doesn't explicitly call exit, we will need the Exit
628 // function later on to make an explicit call, so get the function now.
629 FunctionCallee Exit = Mod->getOrInsertFunction(
630 "exit", Type::getVoidTy(Context), Type::getInt32Ty(Context));
632 // Run static constructors.
633 if (!ForceInterpreter) {
634 // Give MCJIT a chance to apply relocations and set page permissions.
635 EE->finalizeObject();
637 EE->runStaticConstructorsDestructors(false);
639 // Trigger compilation separately so code regions that need to be
640 // invalidated will be known.
641 (void)EE->getPointerToFunction(EntryFn);
642 // Clear instruction cache before code will be executed.
644 static_cast<SectionMemoryManager*>(RTDyldMM)->invalidateInstructionCache();
647 Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
649 // Run static destructors.
650 EE->runStaticConstructorsDestructors(true);
652 // If the program didn't call exit explicitly, we should call it now.
653 // This ensures that any atexit handlers get called correctly.
654 if (Function *ExitF =
655 dyn_cast<Function>(Exit.getCallee()->stripPointerCasts())) {
656 if (ExitF->getFunctionType() == Exit.getFunctionType()) {
657 std::vector<GenericValue> Args;
658 GenericValue ResultGV;
659 ResultGV.IntVal = APInt(32, Result);
660 Args.push_back(ResultGV);
661 EE->runFunction(ExitF, Args);
662 WithColor::error(errs(), argv[0])
663 << "exit(" << Result << ") returned!\n";
667 WithColor::error(errs(), argv[0]) << "exit defined with wrong prototype!\n";
670 // else == "if (RemoteMCJIT)"
672 // Remote target MCJIT doesn't (yet) support static constructors. No reason
673 // it couldn't. This is a limitation of the LLI implementation, not the
674 // MCJIT itself. FIXME.
676 // Lanch the remote process and get a channel to it.
677 std::unique_ptr<FDRawChannel> C = launchRemote();
679 WithColor::error(errs(), argv[0]) << "failed to launch remote JIT.\n";
683 // Create a remote target client running over the channel.
684 llvm::orc::ExecutionSession ES;
685 ES.setErrorReporter([&](Error Err) { ExitOnErr(std::move(Err)); });
686 typedef orc::remote::OrcRemoteTargetClient MyRemote;
687 auto R = ExitOnErr(MyRemote::Create(*C, ES));
689 // Create a remote memory manager.
690 auto RemoteMM = ExitOnErr(R->createRemoteMemoryManager());
692 // Forward MCJIT's memory manager calls to the remote memory manager.
693 static_cast<ForwardingMemoryManager*>(RTDyldMM)->setMemMgr(
694 std::move(RemoteMM));
696 // Forward MCJIT's symbol resolution calls to the remote.
697 static_cast<ForwardingMemoryManager *>(RTDyldMM)->setResolver(
698 orc::createLambdaResolver(
699 AcknowledgeORCv1Deprecation,
700 [](const std::string &Name) { return nullptr; },
701 [&](const std::string &Name) {
702 if (auto Addr = ExitOnErr(R->getSymbolAddress(Name)))
703 return JITSymbol(Addr, JITSymbolFlags::Exported);
704 return JITSymbol(nullptr);
707 // Grab the target address of the JIT'd main function on the remote and call
709 // FIXME: argv and envp handling.
710 JITTargetAddress Entry = EE->getFunctionAddress(EntryFn->getName().str());
711 EE->finalizeObject();
712 LLVM_DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at 0x"
713 << format("%llx", Entry) << "\n");
714 Result = ExitOnErr(R->callIntVoid(Entry));
716 // Like static constructors, the remote target MCJIT support doesn't handle
717 // this yet. It could. FIXME.
719 // Delete the EE - we need to tear it down *before* we terminate the session
720 // with the remote, otherwise it'll crash when it tries to release resources
721 // on a remote that has already been disconnected.
724 // Signal the remote target that we're done JITing.
725 ExitOnErr(R->terminateSession());
731 static std::function<void(Module &)> createDebugDumper() {
732 switch (OrcDumpKind) {
733 case DumpKind::NoDump:
734 return [](Module &M) {};
736 case DumpKind::DumpFuncsToStdOut:
737 return [](Module &M) {
740 for (const auto &F : M) {
741 if (F.isDeclaration())
745 std::string Name(std::string(F.getName()));
746 printf("%s ", Name.c_str());
754 case DumpKind::DumpModsToStdOut:
755 return [](Module &M) {
756 outs() << "----- Module Start -----\n" << M << "----- Module End -----\n";
759 case DumpKind::DumpModsToDisk:
760 return [](Module &M) {
762 raw_fd_ostream Out(M.getModuleIdentifier() + ".ll", EC, sys::fs::OF_Text);
764 errs() << "Couldn't open " << M.getModuleIdentifier()
765 << " for dumping.\nError:" << EC.message() << "\n";
771 llvm_unreachable("Unknown DumpKind");
775 for (const auto &Dylib : Dylibs) {
777 if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
778 return make_error<StringError>(ErrMsg, inconvertibleErrorCode());
781 return Error::success();
784 static void exitOnLazyCallThroughFailure() { exit(1); }
786 Expected<orc::ThreadSafeModule>
787 loadModule(StringRef Path, orc::ThreadSafeContext TSCtx) {
789 auto M = parseIRFile(Path, Err, *TSCtx.getContext());
793 raw_string_ostream ErrMsgStream(ErrMsg);
794 Err.print("lli", ErrMsgStream);
796 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
799 if (EnableCacheManager)
800 M->setModuleIdentifier("file:" + M->getModuleIdentifier());
802 return orc::ThreadSafeModule(std::move(M), std::move(TSCtx));
805 int runOrcLazyJIT(const char *ProgName) {
806 // Start setting up the JIT environment.
808 // Parse the main module.
809 orc::ThreadSafeContext TSCtx(std::make_unique<LLVMContext>());
810 auto MainModule = ExitOnErr(loadModule(InputFile, TSCtx));
812 // Get TargetTriple and DataLayout from the main module if they're explicitly
815 Optional<DataLayout> DL;
816 MainModule.withModuleDo([&](Module &M) {
817 if (!M.getTargetTriple().empty())
818 TT = Triple(M.getTargetTriple());
819 if (!M.getDataLayout().isDefault())
820 DL = M.getDataLayout();
823 orc::LLLazyJITBuilder Builder;
825 Builder.setJITTargetMachineBuilder(
826 TT ? orc::JITTargetMachineBuilder(*TT)
827 : ExitOnErr(orc::JITTargetMachineBuilder::detectHost()));
829 TT = Builder.getJITTargetMachineBuilder()->getTargetTriple();
831 Builder.setDataLayout(DL);
833 if (!codegen::getMArch().empty())
834 Builder.getJITTargetMachineBuilder()->getTargetTriple().setArchName(
835 codegen::getMArch());
837 Builder.getJITTargetMachineBuilder()
838 ->setCPU(codegen::getCPUStr())
839 .addFeatures(codegen::getFeatureList())
840 .setRelocationModel(codegen::getExplicitRelocModel())
841 .setCodeModel(codegen::getExplicitCodeModel());
843 Builder.setLazyCompileFailureAddr(
844 pointerToJITTargetAddress(exitOnLazyCallThroughFailure));
845 Builder.setNumCompileThreads(LazyJITCompileThreads);
847 // If the object cache is enabled then set a custom compile function
848 // creator to use the cache.
849 std::unique_ptr<LLIObjectCache> CacheManager;
850 if (EnableCacheManager) {
852 CacheManager = std::make_unique<LLIObjectCache>(ObjectCacheDir);
854 Builder.setCompileFunctionCreator(
855 [&](orc::JITTargetMachineBuilder JTMB)
856 -> Expected<std::unique_ptr<orc::IRCompileLayer::IRCompiler>> {
857 if (LazyJITCompileThreads > 0)
858 return std::make_unique<orc::ConcurrentIRCompiler>(std::move(JTMB),
861 auto TM = JTMB.createTargetMachine();
863 return TM.takeError();
865 return std::make_unique<orc::TMOwningSimpleCompiler>(std::move(*TM),
870 // Set up LLJIT platform.
872 LLJITPlatform P = Platform;
873 if (P == LLJITPlatform::DetectHost) {
874 if (TT->isOSBinFormatMachO())
875 P = LLJITPlatform::MachO;
877 P = LLJITPlatform::GenericIR;
881 case LLJITPlatform::GenericIR:
882 // Nothing to do: LLJITBuilder will use this by default.
884 case LLJITPlatform::MachO:
885 Builder.setPlatformSetUp(orc::setUpMachOPlatform);
886 ExitOnErr(orc::enableObjCRegistration("libobjc.dylib"));
889 llvm_unreachable("Unrecognized platform value");
893 auto J = ExitOnErr(Builder.create());
895 if (TT->isOSBinFormatELF())
896 static_cast<llvm::orc::RTDyldObjectLinkingLayer &>(J->getObjLinkingLayer())
897 .registerJITEventListener(
898 *JITEventListener::createGDBRegistrationListener());
901 J->setPartitionFunction(orc::CompileOnDemandLayer::compileWholeModule);
903 auto Dump = createDebugDumper();
905 J->getIRTransformLayer().setTransform(
906 [&](orc::ThreadSafeModule TSM,
907 const orc::MaterializationResponsibility &R) {
908 TSM.withModuleDo([&](Module &M) {
909 if (verifyModule(M, &dbgs())) {
910 dbgs() << "Bad module: " << &M << "\n";
918 orc::MangleAndInterner Mangle(J->getExecutionSession(), J->getDataLayout());
920 // Unless they've been explicitly disabled, make process symbols available to
922 if (!NoProcessSymbols)
923 J->getMainJITDylib().addGenerator(
924 ExitOnErr(orc::DynamicLibrarySearchGenerator::GetForCurrentProcess(
925 J->getDataLayout().getGlobalPrefix(),
926 [MainName = Mangle("main")](const orc::SymbolStringPtr &Name) {
927 return Name != MainName;
930 // Add the main module.
931 ExitOnErr(J->addLazyIRModule(std::move(MainModule)));
933 // Create JITDylibs and add any extra modules.
935 // Create JITDylibs, keep a map from argument index to dylib. We will use
936 // -extra-module argument indexes to determine what dylib to use for each
938 std::map<unsigned, orc::JITDylib *> IdxToDylib;
939 IdxToDylib[0] = &J->getMainJITDylib();
940 for (auto JDItr = JITDylibs.begin(), JDEnd = JITDylibs.end();
941 JDItr != JDEnd; ++JDItr) {
942 orc::JITDylib *JD = J->getJITDylibByName(*JDItr);
944 JD = &ExitOnErr(J->createJITDylib(*JDItr));
945 J->getMainJITDylib().addToLinkOrder(*JD);
946 JD->addToLinkOrder(J->getMainJITDylib());
948 IdxToDylib[JITDylibs.getPosition(JDItr - JITDylibs.begin())] = JD;
951 for (auto EMItr = ExtraModules.begin(), EMEnd = ExtraModules.end();
952 EMItr != EMEnd; ++EMItr) {
953 auto M = ExitOnErr(loadModule(*EMItr, TSCtx));
955 auto EMIdx = ExtraModules.getPosition(EMItr - ExtraModules.begin());
956 assert(EMIdx != 0 && "ExtraModule should have index > 0");
957 auto JDItr = std::prev(IdxToDylib.lower_bound(EMIdx));
958 auto &JD = *JDItr->second;
959 ExitOnErr(J->addLazyIRModule(JD, std::move(M)));
962 for (auto EAItr = ExtraArchives.begin(), EAEnd = ExtraArchives.end();
963 EAItr != EAEnd; ++EAItr) {
964 auto EAIdx = ExtraArchives.getPosition(EAItr - ExtraArchives.begin());
965 assert(EAIdx != 0 && "ExtraArchive should have index > 0");
966 auto JDItr = std::prev(IdxToDylib.lower_bound(EAIdx));
967 auto &JD = *JDItr->second;
968 JD.addGenerator(ExitOnErr(orc::StaticLibraryDefinitionGenerator::Load(
969 J->getObjLinkingLayer(), EAItr->c_str(), *TT)));
974 for (auto &ObjPath : ExtraObjects) {
975 auto Obj = ExitOnErr(errorOrToExpected(MemoryBuffer::getFile(ObjPath)));
976 ExitOnErr(J->addObjectFile(std::move(Obj)));
979 // Run any static constructors.
980 ExitOnErr(J->initialize(J->getMainJITDylib()));
982 // Run any -thread-entry points.
983 std::vector<std::thread> AltEntryThreads;
984 for (auto &ThreadEntryPoint : ThreadEntryPoints) {
985 auto EntryPointSym = ExitOnErr(J->lookup(ThreadEntryPoint));
986 typedef void (*EntryPointPtr)();
988 reinterpret_cast<EntryPointPtr>(static_cast<uintptr_t>(EntryPointSym.getAddress()));
989 AltEntryThreads.push_back(std::thread([EntryPoint]() { EntryPoint(); }));
993 auto MainSym = ExitOnErr(J->lookup("main"));
995 typedef int (*MainFnPtr)(int, char *[]);
996 auto Result = orc::runAsMain(
997 jitTargetAddressToFunction<MainFnPtr>(MainSym.getAddress()), InputArgv,
998 StringRef(InputFile));
1000 // Wait for -entry-point threads.
1001 for (auto &AltEntryThread : AltEntryThreads)
1002 AltEntryThread.join();
1005 ExitOnErr(J->deinitialize(J->getMainJITDylib()));
1010 void disallowOrcOptions() {
1011 // Make sure nobody used an orc-lazy specific option accidentally.
1013 if (LazyJITCompileThreads != 0) {
1014 errs() << "-compile-threads requires -jit-kind=orc-lazy\n";
1018 if (!ThreadEntryPoints.empty()) {
1019 errs() << "-thread-entry requires -jit-kind=orc-lazy\n";
1023 if (PerModuleLazy) {
1024 errs() << "-per-module-lazy requires -jit-kind=orc-lazy\n";
1029 std::unique_ptr<FDRawChannel> launchRemote() {
1030 #ifndef LLVM_ON_UNIX
1031 llvm_unreachable("launchRemote not supported on non-Unix platforms");
1036 // Create two pipes.
1037 if (pipe(PipeFD[0]) != 0 || pipe(PipeFD[1]) != 0)
1038 perror("Error creating pipe: ");
1042 if (ChildPID == 0) {
1045 // Close the parent ends of the pipes
1046 close(PipeFD[0][1]);
1047 close(PipeFD[1][0]);
1050 // Execute the child process.
1051 std::unique_ptr<char[]> ChildPath, ChildIn, ChildOut;
1053 ChildPath.reset(new char[ChildExecPath.size() + 1]);
1054 std::copy(ChildExecPath.begin(), ChildExecPath.end(), &ChildPath[0]);
1055 ChildPath[ChildExecPath.size()] = '\0';
1056 std::string ChildInStr = utostr(PipeFD[0][0]);
1057 ChildIn.reset(new char[ChildInStr.size() + 1]);
1058 std::copy(ChildInStr.begin(), ChildInStr.end(), &ChildIn[0]);
1059 ChildIn[ChildInStr.size()] = '\0';
1060 std::string ChildOutStr = utostr(PipeFD[1][1]);
1061 ChildOut.reset(new char[ChildOutStr.size() + 1]);
1062 std::copy(ChildOutStr.begin(), ChildOutStr.end(), &ChildOut[0]);
1063 ChildOut[ChildOutStr.size()] = '\0';
1066 char * const args[] = { &ChildPath[0], &ChildIn[0], &ChildOut[0], nullptr };
1067 int rc = execv(ChildExecPath.c_str(), args);
1069 perror("Error executing child process: ");
1070 llvm_unreachable("Error executing child process");
1072 // else we're the parent...
1074 // Close the child ends of the pipes
1075 close(PipeFD[0][0]);
1076 close(PipeFD[1][1]);
1078 // Return an RPC channel connected to our end of the pipes.
1079 return std::make_unique<FDRawChannel>(PipeFD[1][0], PipeFD[0][1]);