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"
13 cl::StringList InputArgv("" , "Input command line", cl::ConsumeAfter);
14 cl::String MainFunction ("f" , "Function to execute", cl::NoFlags, "main");
15 cl::Flag DebugMode ("debug" , "Start program in debugger");
16 cl::Alias DebugModeA ("d" , "Alias for -debug", cl::NoFlags, DebugMode);
17 cl::Flag TraceMode ("trace" , "Enable Tracing");
18 cl::Flag ProfileMode ("profile", "Enable Profiling [unimp]");
21 //===----------------------------------------------------------------------===//
22 // Interpreter ctor - Initialize stuff
24 Interpreter::Interpreter() : ExitCode(0), Profile(ProfileMode),
25 Trace(TraceMode), CurFrame(-1) {
27 loadModule(InputArgv.size() ? InputArgv[0] : "-");
29 // Initialize the "backend"
30 initializeExecutionEngine();
31 initializeExternalMethods();
34 //===----------------------------------------------------------------------===//
35 // main Driver function
37 int main(int argc, char** argv) {
38 cl::ParseCommandLineOptions(argc, argv, " llvm interpreter\n");
40 // Create the interpreter...
43 // Handle alternate names of the program. If started as llp, enable profiling
44 // if started as ldb, enable debugging...
46 if (argv[0] == "ldb") // TODO: Obviously incorrect, but you get the idea
48 else if (argv[0] == "llp")
51 // If running with the profiler, enable it now...
52 if (ProfileMode) I.enableProfiling();
53 if (TraceMode) I.enableTracing();
55 // Ensure that there is at least one argument... the name of the program.
56 // This is only unavailable if the program was read from stdin, instead of a
59 if (InputArgv.empty())
60 InputArgv.push_back("from-stdin-prog");
62 // Start interpreter into the main function...
64 if (!I.callMainMethod(MainFunction, InputArgv) && !DebugMode) {
65 // If not in debug mode and if the call succeeded, run the code now...
69 // If debug mode, allow the user to interact... also, if the user pressed
70 // ctrl-c or execution hit an error, enter the event loop...
71 if (DebugMode || I.isStopped())
74 // Return the status code of the program executed...
75 return I.getExitCode();