X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=67b1424d839fa1a5315e0932dded192f84f0d2d4;hb=cb41e6bf52e51b2cbf6871f63785af1c12a5fe70;hp=a6e4c037bc3442a7b92937f7c14dd0441e3858ae;hpb=bed85ff010b95923646ed4e187a5d432cedf67da;p=oota-llvm.git diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index a6e4c037bc3..67b1424d839 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -1,10 +1,10 @@ //===- 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, @@ -16,17 +16,24 @@ #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/JIT.h" +#include "llvm/ExecutionEngine/Interpreter.h" #include "llvm/ExecutionEngine/GenericValue.h" -#include "Support/CommandLine.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("...")); @@ -34,36 +41,82 @@ namespace { 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 ExecutionEngine *EE = 0; + +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"); - PrintStackTraceOnErrorSignal(); - - // 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 loading program '" << 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); } - 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) { + std::cerr << argv[0] << ": bitcode didn't read correctly.\n"; + std::cerr << "Reason: " << ErrorMsg << "\n"; + exit(1); + } - // If the user specifically requested an argv[0] to pass into the program, do - // it now. + // 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); + } + + if (NoLazyCompilation) + EE->DisableLazyCompilation(); + + // If the user specifically requested an argv[0] to pass into the program, + // do it now. if (!FakeArgv0.empty()) { InputFile = FakeArgv0; } else { @@ -81,26 +134,49 @@ 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) { + Function *MainFn = Mod->getFunction("main"); + if (!MainFn) { std::cerr << "'main' 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::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); + } + } - std::vector Args; - GenericValue ResultGV; - ResultGV.IntVal = Result; - Args.push_back(ResultGV); - EE->runFunction(Exit, Args); + // Run main. + int Result = EE->runFunctionAsMain(MainFn, 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); + std::cerr << "ERROR: exit(" << Result << ") returned!\n"; + abort(); + } else { + std::cerr << "ERROR: exit defined with wrong prototype!\n"; + abort(); + } }