//===- 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,
//
//===----------------------------------------------------------------------===//
+#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 "Support/PluginLoader.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/System/Process.h"
#include "llvm/System/Signals.h"
+#include "llvm/Target/TargetSelect.h"
#include <iostream>
-
+#include <cerrno>
using namespace llvm;
namespace {
cl::opt<std::string>
- InputFile(cl::desc("<input bytecode>"), cl::Positional, cl::init("-"));
+ InputFile(cl::desc("<input bitcode>"), cl::Positional, cl::init("-"));
cl::list<std::string>
InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
cl::desc("Force interpretation: disable JIT"),
cl::init(false));
+ // Determine optimization level.
+ cl::opt<char>
+ OptLevel("O",
+ cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+ "(default = '-O2')"),
+ cl::Prefix,
+ cl::ZeroOrMore,
+ cl::init(' '));
+
+ cl::opt<std::string>
+ TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+ cl::opt<std::string>
+ EntryFunc("entry-function",
+ cl::desc("Specify the entry function (default = 'main') "
+ "of the executable"),
+ cl::value_desc("function"),
+ cl::init("main"));
+
cl::opt<std::string>
FakeArgv0("fake-argv0",
cl::desc("Override the 'argv[0]' value passed into the executing"
" program"), cl::value_desc("executable"));
+
+ cl::opt<bool>
+ DisableCoreFiles("disable-core-files", cl::Hidden,
+ cl::desc("Disable emission of core files if possible"));
+
+ cl::opt<bool>
+ 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;
+ atexit(do_shutdown); // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv,
- " llvm interpreter & dynamic compiler\n");
- PrintStackTraceOnErrorSignal();
+ "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) {
+ 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);
+
+ CodeGenOpt::Level OLvl = CodeGenOpt::Default;
+ switch (OptLevel) {
+ default:
+ std::cerr << argv[0] << ": invalid optimization level.\n";
+ return 1;
+ case ' ': break;
+ case '0': OLvl = CodeGenOpt::None; break;
+ case '1':
+ case '2': OLvl = CodeGenOpt::Default; break;
+ case '3': OLvl = CodeGenOpt::Aggressive; break;
+ }
+
+ // If we have a native target, initialize it to ensure it is linked in and
+ // usable by the JIT.
+ InitializeNativeTarget();
+
+ EE = ExecutionEngine::create(MP, ForceInterpreter, &ErrorMsg, OLvl);
+ if (!EE && !ErrorMsg.empty()) {
+ std::cerr << argv[0] << ":error creating EE: " << ErrorMsg << "\n";
+ exit(1);
+ }
+
+ EE->RegisterJITEventListener(createMacOSJITEventListener());
+
+ 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 {
// 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) {
+ std::cerr << '\'' << 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::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 != EntryFn && !Fn->isDeclaration())
+ EE->getPointerToFunction(Fn);
+ }
+ }
- std::vector<GenericValue> 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<Function>(Exit)) {
+ std::vector<GenericValue> 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();
+ }
}
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