1 //===----------------------------------------------------------------------===//
2 // LLVM INTERPRETER/DEBUGGER/PROFILER UTILITY
4 // This utility is an interactive frontend to almost all other LLVM
5 // functionality. It may be used as an interpreter to run code, a debugger to
6 // find problems, or a profiler to analyze execution frequencies.
8 //===----------------------------------------------------------------------===//
10 #include "Interpreter.h"
11 #include "llvm/Support/CommandLine.h"
12 #include "llvm/Bytecode/Reader.h"
14 cl::String InputFilename("" , "Input filename", cl::NoFlags, "-");
15 cl::String MainFunction ("f" , "Function to execute", cl::NoFlags, "main");
16 cl::Flag DebugMode ("debug" , "Start program in debugger");
17 cl::Alias DebugModeA ("d" , "Alias for -debug", cl::NoFlags, DebugMode);
18 cl::Flag ProfileMode ("profile", "Enable Profiling [unimp]");
20 //===----------------------------------------------------------------------===//
21 // Interpreter ctor - Initialize stuff
23 Interpreter::Interpreter() : ExitCode(0), Profile(ProfileMode), CurFrame(-1) {
24 CurMod = ParseBytecodeFile(InputFilename);
26 cout << "Error parsing '" << InputFilename << "': No module loaded.\n";
29 // Initialize the "backend"
30 initializeExecutionEngine();
33 //===----------------------------------------------------------------------===//
34 // main Driver function
36 int main(int argc, char** argv) {
37 cl::ParseCommandLineOptions(argc, argv, " llvm interpreter\n");
39 // Create the interpreter...
42 // Handle alternate names of the program. If started as llp, enable profiling
43 // if started as ldb, enable debugging...
45 if (argv[0] == "ldb") // TODO: Obviously incorrect, but you get the idea
47 else if (argv[0] == "llp")
50 // If running with the profiler, enable it now...
51 if (ProfileMode) I.enableProfiling();
53 // Start interpreter into the main function...
55 if (!I.callMethod(MainFunction) && !DebugMode) {
56 // If not in debug mode and if the call succeeded, run the code now...
60 // If debug mode, allow the user to interact... also, if the user pressed
61 // ctrl-c or execution hit an error, enter the event loop...
62 if (DebugMode || I.isStopped())
65 // Return the status code of the program executed...
66 return I.getExitCode();