//===- 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 utility provides a simple wrapper around the LLVM Execution Engines,
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/Type.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Bytecode/Reader.h"
-#include "llvm/ExecutionEngine/ExecutionEngine.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/Compressor.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 <iostream>
-
+#include <cerrno>
using namespace llvm;
namespace {
+ cl::opt<bool> Bitcode("bitcode");
+
cl::opt<std::string>
InputFile(cl::desc("<input bytecode>"), cl::Positional, cl::init("-"));
cl::opt<bool> ForceInterpreter("force-interpreter",
cl::desc("Force interpretation: disable JIT"),
cl::init(false));
-
+ cl::opt<std::string>
+ TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
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"));
+}
+
+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);
- }
-
- 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);
+ atexit(do_shutdown); // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv,
+ " llvm interpreter & dynamic compiler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ // If the user doesn't want core files, disable them.
+ if (DisableCoreFiles)
+ sys::Process::PreventCoreFiles();
+
+ // Load the bytecode...
+ std::string ErrorMsg;
+ ModuleProvider *MP = 0;
+ if (Bitcode) {
+ MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(&InputFile[0],
+ InputFile.size());
+ if (Buffer == 0)
+ ErrorMsg = "Error reading file '" + InputFile + "'";
+ else {
+ MP = getBitcodeModuleProvider(Buffer, &ErrorMsg);
+ if (!MP) delete Buffer;
}
+ } else {
+ MP = getBytecodeModuleProvider(InputFile,
+ Compressor::decompressToNewBuffer,
+ &ErrorMsg);
+ }
+
+ if (!MP) {
+ std::cerr << argv[0] << ": error loading program '" << InputFile << "': "
+ << ErrorMsg << "\n";
+ exit(1);
+ }
- // 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;
- }
+ // Get the module as the MP could go away once EE takes over.
+ Module *Mod = MP->getModule();
+
+ // 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);
+ }
- // Run main...
- int Result = EE->runFunctionAsMain(Fn, InputArgv, envp);
+ // 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 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);
+ // 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 = Mod->getFunction("main");
+ if (!Fn) {
+ 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);
+
+ // Run main.
+ int Result = EE->runFunctionAsMain(Fn, 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<Function>(Exit)) {
std::vector<GenericValue> 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();
}
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