//===- 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 way to execute LLVM bytecode without static
// compilation. This consists of a very simple and slow (but portable)
//
//===----------------------------------------------------------------------===//
-#include "ExecutionEngine.h"
-#include "Support/CommandLine.h"
-#include "llvm/Bytecode/Reader.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.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"
+
+using namespace llvm;
namespace {
cl::opt<std::string>
InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
cl::opt<std::string>
- MainFunction ("f", cl::desc("Function to execute"), cl::init("main"),
- cl::value_desc("function name"));
+ MainFunction("f", cl::desc("Function to execute"), cl::init("main"),
+ cl::value_desc("function name"));
- cl::opt<bool> DebugMode("d", cl::desc("Start program in debugger"));
+ cl::opt<bool> ForceInterpreter("force-interpreter",
+ cl::desc("Force interpretation: disable JIT"),
+ cl::init(false));
- cl::opt<bool> TraceMode("trace", cl::desc("Enable Tracing"));
+ 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> ForceInterpreter("force-interpreter",
- cl::desc("Force interpretation: disable JIT"),
- cl::init(true));
+static std::vector<std::string> makeStringVector(char * const *envp) {
+ std::vector<std::string> rv;
+ for (unsigned i = 0; envp[i]; ++i)
+ rv.push_back(envp[i]);
+ return rv;
}
-//===----------------------------------------------------------------------===//
-// ExecutionEngine Class Implementation
-//
+static void *CreateArgv(ExecutionEngine *EE,
+ const std::vector<std::string> &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;
+ }
+}
-ExecutionEngine::~ExecutionEngine() {
- delete &CurMod;
+/// 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<std::string> &Args,
+ const std::vector<std::string> &EnvVars) {
+ Function *Fn = MP->getModule()->getNamedFunction(FnName);
+ if (!Fn) {
+ std::cerr << "Function '" << FnName << "' not found in module.\n";
+ return -1;
+ }
+ std::vector<GenericValue> GVArgs;
+ GenericValue GVArgc;
+ GVArgc.IntVal = Args.size();
+ GVArgs.push_back(GVArgc); // Arg #0 = argc.
+ GVArgs.push_back(PTOGV(CreateArgv(EE, Args))); // Arg #1 = argv.
+ assert(((char **)GVTOP(GVArgs[1]))[0] && "argv[0] was null after CreateArgv");
+ GVArgs.push_back(PTOGV(CreateArgv(EE, EnvVars))); // Arg #2 = envp.
+ return EE->run(Fn, GVArgs).IntVal;
}
//===----------------------------------------------------------------------===//
// main Driver function
//
-int main(int argc, char** argv) {
+int main(int argc, char **argv, char * const *envp) {
cl::ParseCommandLineOptions(argc, argv,
- " llvm interpreter & dynamic compiler\n");
+ " llvm interpreter & dynamic compiler\n");
// Load the bytecode...
std::string ErrorMsg;
- Module *M = ParseBytecodeFile(InputFile, &ErrorMsg);
- if (M == 0) {
- std::cout << "Error parsing '" << InputFile << "': "
- << ErrorMsg << "\n";
+ ModuleProvider *MP = 0;
+ try {
+ MP = getBytecodeModuleProvider(InputFile);
+ } catch (std::string &err) {
+ std::cerr << "Error loading program '" << InputFile << "': " << err << "\n";
exit(1);
}
-#if 0
- // Link in the runtime library for LLI...
- std::string RuntimeLib = getCurrentExecutablePath();
- if (!RuntimeLib.empty()) RuntimeLib += "/";
- RuntimeLib += "RuntimeLib.bc";
+ ExecutionEngine *EE =
+ ExecutionEngine::create(MP, ForceInterpreter);
+ assert(EE && "Couldn't create an ExecutionEngine, not even an interpreter?");
- if (Module *SupportLib = ParseBytecodeFile(RuntimeLib, &ErrorMsg)) {
- if (LinkModules(M, SupportLib, &ErrorMsg))
- std::cerr << "Error Linking runtime library into current module: "
- << ErrorMsg << "\n";
+ // If the user specifically requested an argv[0] to pass into the program, do
+ // it now.
+ if (!FakeArgv0.empty()) {
+ InputFile = FakeArgv0;
} else {
- std::cerr << "Error loading runtime library '"+RuntimeLib+"': "
- << ErrorMsg << "\n";
+ // 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);
}
-#endif
-
- // FIXME: This should look at the PointerSize and endianness of the bytecode
- // file to determine the endianness and pointer size of target machine to use.
- unsigned Config = TM::PtrSize64 | TM::BigEndian;
-
- ExecutionEngine *EE = 0;
-
- // If there is nothing that is forcing us to use the interpreter, make a JIT.
- if (!ForceInterpreter && !DebugMode && !TraceMode)
- EE = ExecutionEngine::createJIT(M, Config);
-
- // If we can't make a JIT, make an interpreter instead.
- if (EE == 0)
- EE = ExecutionEngine::createInterpreter(M, Config, DebugMode, TraceMode);
- // Add the module name to the start of the argv vector...
+ // 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 = EE->run(MainFunction, InputArgv);
+ int ExitCode = callAsMain(EE, MP, MainFunction, InputArgv,
+ makeStringVector(envp));
// Now that we are done executing the program, shut down the execution engine
delete EE;
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