compiler-rt/lib/orc/tests/tools/orc-rt-executor.cpp

   1 //===- orc-rt-executor.cpp ------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Contains the orc-rt-executor test tool. This is a "blank executable" that
  10 // links the ORC runtime and can accept code from a JIT controller like lii or
  11 // llvm-jitlink.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include <cstring>
  16 #include <iostream>
  17 #include <optional>
  18 #include <string_view>
  19
  20 void printHelp(std::string_view ProgName, std::ostream &OS) {
  21   OS << "usage: " << ProgName << " [help] [<mode>] <program arguments>...\n"
  22      << "  <mode>                 -- specify how to listen for JIT'd program\n"
  23      << "    filedesc=<in>,<out>  -- read from <in> filedesc, write to out\n"
  24      << "    tcp=<host>:<port>    -- listen on the given host/port\n"
  25      << "  help                   -- print help and exit\n"
  26      << "\n"
  27      << " Notes:\n"
  28      << "   Program arguments will be made available to the JIT controller.\n"
  29      << "   When running a JIT'd program containing a main function the\n"
  30      << "   controller may choose to pass these on to main, however\n"
  31      << "   orc-rt-executor does not enforce this.\n";
  32 }
  33
  34 int main(int argc, char *argv[]) {
  35   if (argc < 2) {
  36     printHelp("orc-rt-executor", std::cerr);
  37     std::cerr << "error: insufficient arguments.\n";
  38     exit(1);
  39   }
  40
  41   if (!strcmp(argv[1], "help")) {
  42     printHelp(argv[0], std::cerr);
  43     exit(0);
  44   }
  45
  46   std::cerr << "error: One day I will be a real program, but I am not yet.\n";
  47
  48   return 0;
  49 }