X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=218bb93670aed0e374f4ce884675f67af17b1e64;hb=9bc0af847d72e895fbc42b7a2d17fde33c6a5a66;hp=15bf500bba805d94111c24cfafbb0e15312889e0;hpb=6fb6ce3148ec4a9aaab47800da2365d7f60a6f5b;p=oota-llvm.git diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index 15bf500bba8..218bb93670a 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -1,31 +1,43 @@ //===- 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/LLVMContext.h" #include "llvm/Module.h" #include "llvm/ModuleProvider.h" #include "llvm/Type.h" -#include "llvm/Bytecode/Reader.h" -#include "llvm/ExecutionEngine/ExecutionEngine.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/JIT.h" +#include "llvm/ExecutionEngine/JITEventListener.h" +#include "llvm/Support/CommandLine.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/System/Process.h" +#include "llvm/System/Signals.h" +#include "llvm/Target/TargetSelect.h" +#include 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("...")); @@ -34,34 +46,129 @@ namespace { cl::desc("Force interpretation: disable JIT"), 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 + 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)); +} + +static ExecutionEngine *EE = 0; + +static void do_shutdown() { + delete EE; + llvm_shutdown(); } //===----------------------------------------------------------------------===// // 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(); + cl::ParseCommandLineOptions(argc, argv, - " llvm interpreter & dynamic compiler\n"); + "llvm interpreter & dynamic compiler\n"); - // Load the bytecode... + // If the user doesn't want core files, disable them. + if (DisableCoreFiles) + sys::Process::PreventCoreFiles(); + + // Load the bitcode... std::string ErrorMsg; - ModuleProvider *MP = 0; - try { - MP = getBytecodeModuleProvider(InputFile); - } catch (std::string &err) { - std::cerr << "Error loading program '" << InputFile << "': " << err << "\n"; + ModuleProvider *MP = NULL; + if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)){ + MP = getBitcodeModuleProvider(Buffer, Context, &ErrorMsg); + if (!MP) delete Buffer; + } + + if (!MP) { + errs() << argv[0] << ": error loading program '" << InputFile << "': " + << ErrorMsg << "\n"; exit(1); } - ExecutionEngine *EE = ExecutionEngine::create(MP, ForceInterpreter); - assert(EE && "Couldn't create an ExecutionEngine, not even an interpreter?"); + // Get the module as the MP could go away once EE takes over. + Module *Mod = NoLazyCompilation + ? MP->materializeModule(&ErrorMsg) : MP->getModule(); + if (!Mod) { + errs() << argv[0] << ": bitcode didn't read correctly.\n"; + errs() << "Reason: " << ErrorMsg << "\n"; + exit(1); + } + + EngineBuilder builder(MP); + 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(TargetTriple); + + 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); + } + + EE->RegisterJITEventListener(createOProfileJITEventListener()); + + EE->DisableLazyCompilation(NoLazyCompilation); - // If the user specifically requested an argv[0] to pass into the program, do - // it now. + // If the user specifically requested an argv[0] to pass into the program, + // do it now. if (!FakeArgv0.empty()) { InputFile = FakeArgv0; } else { @@ -79,26 +186,50 @@ int main(int argc, char **argv, char * const *envp) { // 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); - - // 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); + // 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); + + 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); + } + } - std::vector Args; - GenericValue ResultGV; - ResultGV.IntVal = Result; - Args.push_back(ResultGV); - EE->runFunction(Exit, Args); + // Run main. + int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp); - std::cerr << "ERROR: exit(" << Result << ") returned!\n"; - abort(); + // 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(); + } }