crashtest/main.c

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
// crashtest: tests exception handling in the host POSIX subsystem
 
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
// Don't give a warning for division by zero
#pragma GCC diagnostic ignored "-Wdiv-by-zero"
 
void sighandler(int sig) {
  printf("Happily ignoring signal %d\n", sig);
}
 
int main(int argc, char* argv[]) {
  printf("crashtest: a return value of zero means success\n");
 
  signal(SIGFPE, sighandler);
  signal(SIGILL, sighandler);
 
  // SIGFPE
  printf("Testing SIGFPE...\n");
  volatile int zero = 0;
  int a = 1 / zero;  // NOLINT(clang-analyzer-core.DivideZero)
  float b = 1.0f / 0.0f;
  double c = 1.0 / 0.0;
  printf("Works.\n");
 
  // SIGILL
  printf("Testing SIGILL...\n");
  char badops[] = {0xab, 0xcd, 0xef, 0x12};
  void (*f)() = (void (*)())badops;
  f();
  printf("Works.\n");
 
  printf("All signals handled.\n");
 
  return 0;
}