gdb/testsuite/gdb.base/branch-to-self.c

/* This testcase is part of GDB, the GNU debugger.

   Copyright 2016-2021 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <unistd.h>
#include <stdlib.h>
#include <signal.h>

volatile int counter = 0;

static void
handler (int sig)
{
  counter = 5;
}

int
main (void)
{
  signal (SIGALRM, handler);
  alarm (5);

  /* Compiler may generate a single instruction which branches to
     itself.  */
  for (;;); /* loop-line */
  return 0;
}