//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// 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 intepreter if no JIT is available for this platform.
+// compiler, or through an interpreter if no JIT is available for this platform.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Module.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/Type.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/IR/LLVMContext.h"
+#include "RemoteMemoryManager.h"
+#include "RemoteTarget.h"
+#include "RemoteTargetExternal.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/LinkAllCodegenComponents.h"
#include "llvm/ExecutionEngine/GenericValue.h"
-#include "Support/CommandLine.h"
+#include "llvm/ExecutionEngine/Interpreter.h"
+#include "llvm/ExecutionEngine/JITEventListener.h"
+#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/ExecutionEngine/ObjectCache.h"
+#include "llvm/ExecutionEngine/SectionMemoryManager.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/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 {
cl::opt<std::string>
- InputFile(cl::desc("<input bytecode>"), cl::Positional, cl::init("-"));
+ InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
cl::list<std::string>
InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
cl::desc("Force interpretation: disable JIT"),
cl::init(false));
+ cl::opt<bool> DebugIR(
+ "debug-ir", cl::desc("Generate debug information to allow debugging IR."),
+ cl::init(false));
+
+ // 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));
+ cl::opt<bool>
+// In debug builds, make this default to true.
+#ifdef NDEBUG
+#define EMIT_DEBUG false
+#else
+#define EMIT_DEBUG true
+#endif
+ EmitJitDebugInfo("jit-emit-debug",
+ cl::desc("Emit debug information to debugger"),
+ cl::init(EMIT_DEBUG));
+#undef EMIT_DEBUG
+
+ static cl::opt<bool>
+ EmitJitDebugInfoToDisk("jit-emit-debug-to-disk",
+ cl::Hidden,
+ cl::desc("Emit debug info objfiles to disk"),
+ cl::init(false));
+}
+
+//===----------------------------------------------------------------------===//
+// 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 += '/';
+ }
+ virtual ~LLIObjectCache() {}
+
+ 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(CacheName);
+ sys::path::remove_filename(dir);
+ 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));
}
+
//===----------------------------------------------------------------------===//
// 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");
+ "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 (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->materializeAllPermanently()) {
+ errs() << argv[0] << ": bitcode didn't read correctly.\n";
+ errs() << "Reason: " << EC.message() << "\n";
+ exit(1);
+ }
+ }
+
+ if (DebugIR) {
+ ModulePass *DebugIRPass = createDebugIRPass();
+ DebugIRPass->runOnModule(*Mod);
+ }
- // Load the bytecode...
std::string ErrorMsg;
- ModuleProvider *MP = 0;
- try {
- MP = getBytecodeModuleProvider(InputFile);
- } catch (std::string &err) {
- std::cerr << "Error loading program '" << InputFile << "': " << err << "\n";
+ 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);
+
+ // 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 RemoteMemoryManager();
+ else
+ RTDyldMM = new SectionMemoryManager();
+ builder.setMCJITMemoryManager(RTDyldMM);
+ } else {
+ if (RemoteMCJIT) {
+ errs() << "error: Remote process execution requires -use-mcjit\n";
+ exit(1);
+ }
+ builder.setJITMemoryManager(ForceInterpreter ? nullptr :
+ JITMemoryManager::CreateDefaultMemManager());
+ }
+
+ CodeGenOpt::Level OLvl = CodeGenOpt::Default;
+ switch (OptLevel) {
+ default:
+ errs() << argv[0] << ": invalid optimization level.\n";
+ return 1;
+ case ' ': break;
+ case '0': OLvl = CodeGenOpt::None; break;
+ case '1': OLvl = CodeGenOpt::Less; break;
+ case '2': OLvl = CodeGenOpt::Default; break;
+ case '3': OLvl = CodeGenOpt::Aggressive; break;
+ }
+ builder.setOptLevel(OLvl);
+
+ TargetOptions Options;
+ Options.UseSoftFloat = GenerateSoftFloatCalls;
+ if (FloatABIForCalls != FloatABI::Default)
+ Options.FloatABIType = FloatABIForCalls;
+ if (GenerateSoftFloatCalls)
+ FloatABIForCalls = FloatABI::Soft;
+
+ // Remote target execution doesn't handle EH or debug registration.
+ if (!RemoteMCJIT) {
+ Options.JITEmitDebugInfo = EmitJitDebugInfo;
+ Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk;
+ }
+
+ 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);
}
- ExecutionEngine *EE =
- ExecutionEngine::create(MP, ForceInterpreter);
- assert(EE && "Couldn't create an ExecutionEngine, not even an interpreter?");
+ 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 the user specifically requested an argv[0] to pass into the program, do
- // it now.
+ 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 = FakeArgv0;
} else {
// Otherwise, if there is a .bc suffix on the executable strip it off, it
// might confuse the program.
- if (InputFile.rfind(".bc") == InputFile.length() - 3)
+ if (StringRef(InputFile).endswith(".bc"))
InputFile.erase(InputFile.length() - 3);
}
// using the contents of Args to determine argc & argv, and the contents of
// EnvVars to determine envp.
//
- Function *Fn = MP->getModule()->getMainFunction();
- if (!Fn) {
- std::cerr << "'main' function not found in module.\n";
+ Function *EntryFn = Mod->getFunction(EntryFunc);
+ if (!EntryFn) {
+ errs() << '\'' << EntryFunc << "\' function not found in module.\n";
return -1;
}
- // Run main...
- int Result = EE->runFunctionAsMain(Fn, InputArgv, envp);
+ // Reset errno to zero on entry to main.
+ errno = 0;
+
+ int Result;
+
+ 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),
+ NULL);
- // If the program didn't explicitly call exit, call exit now, for the program.
- // This ensures that any atexit handlers get called correctly.
- Function *Exit = MP->getModule()->getOrInsertFunction("exit", Type::VoidTy,
- Type::IntTy, 0);
+ // Run static constructors.
+ if (!ForceInterpreter) {
+ // Give MCJIT a chance to apply relocations and set page permissions.
+ EE->finalizeObject();
+ }
+ EE->runStaticConstructorsDestructors(false);
- std::vector<GenericValue> Args;
- GenericValue ResultGV;
- ResultGV.IntVal = Result;
- Args.push_back(ResultGV);
- EE->runFunction(Exit, Args);
+ // 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.
+ //
+ RemoteMemoryManager *MM = static_cast<RemoteMemoryManager*>(RTDyldMM);
+ // Everything is prepared now, so lay out our program for the target
+ // address space, assign the section addresses to resolve any relocations,
+ // and send it to the target.
+
+ std::unique_ptr<RemoteTarget> Target;
+ if (!ChildExecPath.empty()) { // Remote execution on a child process
+#ifndef LLVM_ON_UNIX
+ // FIXME: Remove this pointless fallback mode which causes tests to "pass"
+ // on platforms where they should XFAIL.
+ errs() << "Warning: host does not support external remote targets.\n"
+ << " Defaulting to simulated remote execution\n";
+ Target.reset(new RemoteTarget);
+#else
+ if (!sys::fs::can_execute(ChildExecPath)) {
+ errs() << "Unable to find usable child executable: '" << ChildExecPath
+ << "'\n";
+ return -1;
+ }
+ Target.reset(new RemoteTargetExternal(ChildExecPath));
+#endif
+ } else {
+ // No child process name provided, use simulated remote execution.
+ Target.reset(new RemoteTarget);
+ }
+
+ // Give the memory manager a pointer to our remote target interface object.
+ MM->setRemoteTarget(Target.get());
+
+ // Create the remote target.
+ if (!Target->create()) {
+ errs() << "ERROR: " << Target->getErrorMsg() << "\n";
+ return EXIT_FAILURE;
+ }
+
+ // Since we're executing in a (at least simulated) remote address space,
+ // we can't use the ExecutionEngine::runFunctionAsMain(). We have to
+ // grab the function address directly here and tell the remote target
+ // to execute the function.
+ //
+ // Our memory manager will map generated code into the remote address
+ // space as it is loaded and copy the bits over during the finalizeMemory
+ // operation.
+ //
+ // FIXME: argv and envp handling.
+ uint64_t Entry = EE->getFunctionAddress(EntryFn->getName().str());
+
+ DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at 0x"
+ << format("%llx", Entry) << "\n");
+
+ if (!Target->executeCode(Entry, Result))
+ errs() << "ERROR: " << Target->getErrorMsg() << "\n";
+
+ // Like static constructors, the remote target MCJIT support doesn't handle
+ // this yet. It could. FIXME.
+
+ // Stop the remote target
+ Target->stop();
+ }
- std::cerr << "ERROR: exit(" << Result << ") returned!\n";
- abort();
+ return Result;
}
projects / oota-llvm.git / blobdiff