X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Flli%2Flli.cpp;h=67b1424d839fa1a5315e0932dded192f84f0d2d4;hb=cb41e6bf52e51b2cbf6871f63785af1c12a5fe70;hp=d8f2b16e57c4fd11f3837553e6b8d26cf12ba1a6;hpb=d3a680ae2cb1ca2d96d1272754af4702862dcb30;p=oota-llvm.git diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp index d8f2b16e57c..67b1424d839 100644 --- a/tools/lli/lli.cpp +++ b/tools/lli/lli.cpp @@ -2,8 +2,8 @@ // // 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. // //===----------------------------------------------------------------------===// // @@ -16,21 +16,24 @@ #include "llvm/Module.h" #include "llvm/ModuleProvider.h" #include "llvm/Type.h" -#include "llvm/Bytecode/Reader.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/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("...")); @@ -45,87 +48,135 @@ namespace { 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) { - try { - cl::ParseCommandLineOptions(argc, argv, - " llvm interpreter & dynamic compiler\n"); - sys::PrintStackTraceOnErrorSignal(); - - // 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"; - exit(1); - } + atexit(do_shutdown); // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, + "llvm interpreter & dynamic compiler\n"); + sys::PrintStackTraceOnErrorSignal(); - // If we are supposed to override the target triple, do so now. - if (!TargetTriple.empty()) - MP->getModule()->setTargetTriple(TargetTriple); - - ExecutionEngine *EE = ExecutionEngine::create(MP, ForceInterpreter); - assert(EE &&"Couldn't create an ExecutionEngine, not even an interpreter?"); - - // 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) - InputFile.erase(InputFile.length() - 3); - } + // If the user doesn't want core files, disable them. + if (DisableCoreFiles) + sys::Process::PreventCoreFiles(); + + // Load the bitcode... + std::string ErrorMsg; + 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); - // Add the module's name to the start of the vector of arguments to main(). - InputArgv.insert(InputArgv.begin(), InputFile); - - // 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 *Fn = MP->getModule()->getMainFunction(); - if (!Fn) { - std::cerr << "'main' function not found in module.\n"; - return -1; + 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 { + // 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) + 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); + + // 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; + } + + // 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 static constructors. - EE->runStaticConstructorsDestructors(false); - - // Run main. - int Result = EE->runFunctionAsMain(Fn, InputArgv, envp); - - // Run static destructors. - EE->runStaticConstructorsDestructors(true); - - // 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, - (Type *)0); + // 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 = Result; + ResultGV.IntVal = APInt(32, Result); Args.push_back(ResultGV); - EE->runFunction(Exit, Args); - + EE->runFunction(ExitF, Args); std::cerr << "ERROR: exit(" << Result << ") returned!\n"; abort(); - } catch (const std::string& msg) { - std::cerr << argv[0] << ": " << msg << "\n"; - } catch (...) { - std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n"; + } else { + std::cerr << "ERROR: exit defined with wrong prototype!\n"; + abort(); } - abort(); }