X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=50c7a498f1cdaed12c0ba9b9ed847ce1fb7748d0;hb=adf01b3f18442ae8db6b8948e70d82d9df415119;hp=2cd4e823c3bb8133783bcf016b3fb0331af39024;hpb=7c0e022c5c4be4b11e199a53f73bbdd84e34aa80;p=oota-llvm.git diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index 2cd4e823c3b..50c7a498f1c 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -1,161 +1,305 @@ //===- 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 way to execute LLVM bytecode without static -// compilation. This consists of a very simple and slow (but portable) -// interpreter, along with capability for system specific dynamic compilers. At -// runtime, the fastest (stable) execution engine is selected to run the -// program. This means the JIT compiler for the current platform if it's -// available. +// 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 "llvm/DerivedTypes.h" +#include "llvm/LLVMContext.h" #include "llvm/Module.h" -#include "llvm/ModuleProvider.h" -#include "llvm/Bytecode/Reader.h" -#include "llvm/ExecutionEngine/ExecutionEngine.h" +#include "llvm/Type.h" +#include "llvm/ADT/Triple.h" +#include "llvm/Bitcode/ReaderWriter.h" +#include "llvm/CodeGen/LinkAllCodegenComponents.h" #include "llvm/ExecutionEngine/GenericValue.h" -#include "llvm/Target/TargetMachineImpls.h" -#include "llvm/Target/TargetData.h" -#include "Support/CommandLine.h" -#include "Support/Debug.h" -#include "Support/SystemUtils.h" +#include "llvm/ExecutionEngine/Interpreter.h" +#include "llvm/ExecutionEngine/JIT.h" +#include "llvm/ExecutionEngine/JITEventListener.h" +#include "llvm/ExecutionEngine/MCJIT.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/IRReader.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PluginLoader.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Support/Process.h" +#include "llvm/Support/Signals.h" +#include "llvm/Support/TargetSelect.h" +#include + +#ifdef __CYGWIN__ +#include +#if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007 +#define DO_NOTHING_ATEXIT 1 +#endif +#endif + +using namespace llvm; namespace { cl::opt - InputFile(cl::desc(""), cl::Positional, cl::init("-")); + InputFile(cl::desc(""), cl::Positional, cl::init("-")); cl::list InputArgv(cl::ConsumeAfter, cl::desc("...")); - cl::opt - MainFunction("f", cl::desc("Function to execute"), cl::init("main"), - cl::value_desc("function name")); - - cl::opt TraceMode("trace", cl::desc("Enable Tracing")); - cl::opt ForceInterpreter("force-interpreter", cl::desc("Force interpretation: disable JIT"), cl::init(false)); -} -static std::vector makeStringVector(char * const *envp) { - std::vector rv; - for (unsigned i = 0; envp[i]; ++i) - rv.push_back(envp[i]); - return rv; -} + cl::opt UseMCJIT( + "use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"), + cl::init(false)); + + // Determine optimization level. + cl::opt + OptLevel("O", + cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " + "(default = '-O2')"), + cl::Prefix, + cl::ZeroOrMore, + cl::init(' ')); + + cl::opt + TargetTriple("mtriple", cl::desc("Override target triple for module")); + + cl::opt + MArch("march", + cl::desc("Architecture to generate assembly for (see --version)")); + + cl::opt + MCPU("mcpu", + cl::desc("Target a specific cpu type (-mcpu=help for details)"), + cl::value_desc("cpu-name"), + cl::init("")); + + cl::list + MAttrs("mattr", + cl::CommaSeparated, + cl::desc("Target specific attributes (-mattr=help for details)"), + cl::value_desc("a1,+a2,-a3,...")); + + cl::opt + EntryFunc("entry-function", + cl::desc("Specify the entry function (default = 'main') " + "of the executable"), + cl::value_desc("function"), + cl::init("main")); + + cl::opt + FakeArgv0("fake-argv0", + cl::desc("Override the 'argv[0]' value passed into the executing" + " program"), cl::value_desc("executable")); + + cl::opt + DisableCoreFiles("disable-core-files", cl::Hidden, + cl::desc("Disable emission of core files if possible")); + + cl::opt + NoLazyCompilation("disable-lazy-compilation", + cl::desc("Disable JIT lazy compilation"), + cl::init(false)); + + cl::opt + 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 + 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)); -static void *CreateArgv(ExecutionEngine *EE, - const std::vector &InputArgv) { - if (EE->getTargetData().getPointerSize() == 8) { // 64 bit target? - PointerTy *Result = new PointerTy[InputArgv.size()+1]; - DEBUG(std::cerr << "ARGV = " << (void*)Result << "\n"); - - for (unsigned i = 0; i < InputArgv.size(); ++i) { - unsigned Size = InputArgv[i].size()+1; - char *Dest = new char[Size]; - DEBUG(std::cerr << "ARGV[" << i << "] = " << (void*)Dest << "\n"); - - std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest); - Dest[Size-1] = 0; - - // Endian safe: Result[i] = (PointerTy)Dest; - EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i), - Type::LongTy); - } - Result[InputArgv.size()] = 0; - return Result; - } else { // 32 bit target? - int *Result = new int[InputArgv.size()+1]; - DEBUG(std::cerr << "ARGV = " << (void*)Result << "\n"); - - for (unsigned i = 0; i < InputArgv.size(); ++i) { - unsigned Size = InputArgv[i].size()+1; - char *Dest = new char[Size]; - DEBUG(std::cerr << "ARGV[" << i << "] = " << (void*)Dest << "\n"); - - std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest); - Dest[Size-1] = 0; - - // Endian safe: Result[i] = (PointerTy)Dest; - EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i), - Type::IntTy); - } - Result[InputArgv.size()] = 0; // null terminate it - return Result; - } } -/// callAsMain - Call the function named FnName 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. Returns the result -/// from calling FnName, or -1 and prints an error msg. if the named -/// function cannot be found. -/// -int callAsMain(ExecutionEngine *EE, ModuleProvider *MP, - const std::string &FnName, - const std::vector &Args, - const std::vector &EnvVars) { - Function *Fn = MP->getModule()->getNamedFunction(FnName); - if (!Fn) { - std::cerr << "Function '" << FnName << "' not found in module.\n"; - return -1; - } - std::vector GVArgs; - GenericValue GVArgc; - GVArgc.IntVal = Args.size(); - GVArgs.push_back(GVArgc); // Arg #0 = argc. - GVArgs.push_back(PTOGV(CreateArgv(EE, Args))); // Arg #1 = argv. - GVArgs.push_back(PTOGV(CreateArgv(EE, EnvVars))); // Arg #2 = envp. - return EE->run(Fn, GVArgs).IntVal; +static ExecutionEngine *EE = 0; + +static void do_shutdown() { + // Cygwin-1.5 invokes DLL's dtors before atexit handler. +#ifndef DO_NOTHING_ATEXIT + delete EE; + llvm_shutdown(); +#endif } //===----------------------------------------------------------------------===// // 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(); + 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; + Module *Mod = ParseIRFile(InputFile, Err, Context); + if (!Mod) { + Err.Print(argv[0], errs()); + return 1; + } - // Load the bytecode... + // If not jitting lazily, load the whole bitcode file eagerly too. std::string ErrorMsg; - ModuleProvider *MP = 0; - try { - MP = getBytecodeModuleProvider(InputFile); - } catch (std::string &err) { - std::cerr << "Error parsing '" << InputFile << "': " << err << "\n"; + if (NoLazyCompilation) { + if (Mod->MaterializeAllPermanently(&ErrorMsg)) { + errs() << argv[0] << ": bitcode didn't read correctly.\n"; + errs() << "Reason: " << ErrorMsg << "\n"; + exit(1); + } + } + + EngineBuilder builder(Mod); + 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. + if (UseMCJIT) + builder.setUseMCJIT(true); + + 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); + + 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, TraceMode); - assert(EE && "Couldn't create an ExecutionEngine, not even an interpreter?"); + EE->RegisterJITEventListener(createOProfileJITEventListener()); - // Add the module's name to the start of the vector of arguments to main(). - // But delete .bc first, since programs (and users) might not expect to - // see it. - const std::string ByteCodeFileSuffix(".bc"); - if (InputFile.rfind(ByteCodeFileSuffix) == - InputFile.length() - ByteCodeFileSuffix.length()) { - InputFile.erase (InputFile.length() - ByteCodeFileSuffix.length()); + 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 (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); - // Run the main function! - int ExitCode = callAsMain(EE, MP, MainFunction, InputArgv, - makeStringVector(envp)); + // 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; + } + + // 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); + + // Reset errno to zero on entry to main. + errno = 0; + + // Run static constructors. + EE->runStaticConstructorsDestructors(false); - // Now that we are done executing the program, shut down the execution engine - delete EE; - return ExitCode; + if (NoLazyCompilation) { + for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) { + Function *Fn = &*I; + if (Fn != EntryFn && !Fn->isDeclaration()) + EE->getPointerToFunction(Fn); + } + } + + // Run main. + int 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(Exit)) { + std::vector 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(); + } }