X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=67b1424d839fa1a5315e0932dded192f84f0d2d4;hb=cb41e6bf52e51b2cbf6871f63785af1c12a5fe70;hp=87fe461ce0d744a4fea39729595868f5102149ce;hpb=e69671d65b45b6a1bbbdc1b215b8c0f943171c29;p=oota-llvm.git diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index 87fe461ce0d..67b1424d839 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -1,150 +1,122 @@ //===- 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 intepreter if no JIT is available for this platform. // //===----------------------------------------------------------------------===// -#include "llvm/DerivedTypes.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/Bitcode/ReaderWriter.h" +#include "llvm/CodeGen/LinkAllCodegenComponents.h" +#include "llvm/ExecutionEngine/JIT.h" +#include "llvm/ExecutionEngine/Interpreter.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/Support/CommandLine.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PluginLoader.h" +#include "llvm/System/Process.h" +#include "llvm/System/Signals.h" +#include +#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("...")); - cl::opt - MainFunction("f", cl::desc("Function to execute"), cl::init("main"), - cl::value_desc("function name")); - cl::opt ForceInterpreter("force-interpreter", cl::desc("Force interpretation: disable JIT"), cl::init(false)); - + cl::opt + TargetTriple("mtriple", cl::desc("Override target triple for module")); + 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 std::vector makeStringVector(char * const *envp) { - std::vector rv; - for (unsigned i = 0; envp[i]; ++i) - rv.push_back(envp[i]); - return rv; -} - -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; - } -} +static ExecutionEngine *EE = 0; -/// 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 void do_shutdown() { + delete EE; + llvm_shutdown(); } //===----------------------------------------------------------------------===// // main Driver function // int main(int argc, char **argv, char * const *envp) { + atexit(do_shutdown); // Call llvm_shutdown() on exit. cl::ParseCommandLineOptions(argc, argv, - " llvm interpreter & dynamic compiler\n"); - - // Load the bytecode... + "llvm interpreter & dynamic compiler\n"); + sys::PrintStackTraceOnErrorSignal(); + + // 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 parsing '" << InputFile << "': " << err << "\n"; + ModuleProvider *MP = NULL; + if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)) { + MP = getBitcodeModuleProvider(Buffer, &ErrorMsg); + if (!MP) delete Buffer; + } + + if (!MP) { + std::cerr << argv[0] << ": error loading program '" << InputFile << "': " + << ErrorMsg << "\n"; + exit(1); + } + + // Get the module as the MP could go away once EE takes over. + Module *Mod = NoLazyCompilation + ? MP->materializeModule(&ErrorMsg) : MP->getModule(); + if (!Mod) { + std::cerr << argv[0] << ": bitcode didn't read correctly.\n"; + std::cerr << "Reason: " << ErrorMsg << "\n"; + exit(1); + } + + // If we are supposed to override the target triple, do so now. + if (!TargetTriple.empty()) + Mod->setTargetTriple(TargetTriple); + + EE = ExecutionEngine::create(MP, ForceInterpreter, &ErrorMsg); + if (!EE && !ErrorMsg.empty()) { + std::cerr << argv[0] << ":error creating EE: " << ErrorMsg << "\n"; exit(1); } - ExecutionEngine *EE = - ExecutionEngine::create(MP, ForceInterpreter); - assert(EE && "Couldn't create an ExecutionEngine, not even an interpreter?"); + if (NoLazyCompilation) + EE->DisableLazyCompilation(); - // 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 { @@ -157,11 +129,54 @@ int main(int argc, char **argv, char * const *envp) { // 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 *MainFn = Mod->getFunction("main"); + if (!MainFn) { + std::cerr << "'main' function not found in module.\n"; + return -1; + } - // Now that we are done executing the program, shut down the execution engine - delete EE; - return ExitCode; + // 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::VoidTy, + Type::Int32Ty, 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 != MainFn && !Fn->isDeclaration()) + EE->getPointerToFunction(Fn); + } + } + + // Run main. + int Result = EE->runFunctionAsMain(MainFn, 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); + std::cerr << "ERROR: exit(" << Result << ") returned!\n"; + abort(); + } else { + std::cerr << "ERROR: exit defined with wrong prototype!\n"; + abort(); + } }