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//===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
//
// This file implements the top-level functionality for the LLVM interpreter.
// This interpreter is designed to be a very simple, portable, inefficient
// interpreter.
//
//===----------------------------------------------------------------------===//
#include "Interpreter.h"
#include "llvm/Target/TargetMachineImpls.h"
/// createInterpreter - Create a new interpreter object. This can never fail.
///
ExecutionEngine *ExecutionEngine::createInterpreter(Module *M,
unsigned Config,
bool DebugMode,
bool TraceMode) {
return new Interpreter(M, Config, DebugMode, TraceMode);
}
//===----------------------------------------------------------------------===//
// Interpreter ctor - Initialize stuff
//
Interpreter::Interpreter(Module *M, unsigned Config,
bool DebugMode, bool TraceMode)
: ExecutionEngine(M), ExitCode(0), Debug(DebugMode), Trace(TraceMode),
CurFrame(-1), TD("lli", (Config & TM::EndianMask) == TM::LittleEndian,
(Config & TM::PtrSizeMask) == TM::PtrSize64 ? 8 : 4,
(Config & TM::PtrSizeMask) == TM::PtrSize64 ? 8 : 4,
(Config & TM::PtrSizeMask) == TM::PtrSize64 ? 8 : 4) {
setTargetData(TD);
// Initialize the "backend"
initializeExecutionEngine();
initializeExternalFunctions();
CW.setModule(M); // Update Writer
emitGlobals();
}
/// run - Start execution with the specified function and arguments.
///
int Interpreter::run(const std::string &MainFunction,
const std::vector<std::string> &Args) {
// Start interpreter into the main function...
//
if (!callMainFunction(MainFunction, Args) && !Debug) {
// If not in debug mode and if the call succeeded, run the code now...
run();
}
do {
// If debug mode, allow the user to interact... also, if the user pressed
// ctrl-c or execution hit an error, enter the event loop...
if (Debug || isStopped())
handleUserInput();
// If the program has exited, run atexit handlers...
if (ECStack.empty() && !AtExitHandlers.empty()) {
callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
AtExitHandlers.pop_back();
run();
}
} while (!ECStack.empty());
PerformExitStuff();
return ExitCode;
}
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