Attachment 212901 Details for Bug 244162 – Parent/child testcase reproducing the current Rawhide GDB.

Parent/child testcase reproducing the current Rawhide GDB.

signalgdb.c (text/plain), 2.54 KB, created by Jan Kratochvil on 2007-10-01 21:40:22 UTC

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Creator: Jan Kratochvil

Created: 2007-10-01 21:40:22 UTC

Size: 2.54 KB

patch

obsolete

>/* This testcase is part of GDB, the GNU debugger.
>
>   Copyright 2007 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 2 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, write to the Free Software
>   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
>
>#define _GNU_SOURCE
>#include <signal.h>
>#include <unistd.h>
>#include <string.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <errno.h>
>#include <sys/wait.h>
>#include <sys/ptrace.h>
>#include <assert.h>
>#include <fcntl.h>
>
>#include <asm/unistd.h>
>#include <unistd.h>
>#define tkill(tid, sig) syscall (__NR_tkill, (tid), (sig))
>
>static pid_t child;
>
>static void cleanup (void)
>{
>  if (child != 0)
>    kill (child, SIGKILL);
>}
>
>static void handler (int signo)
>{
>  cleanup ();
>
>  signal (signo, SIG_DFL);
>  abort ();
>}
>
>int main (void)
>{
>  void (*handler_orig) (int signo);
>  unsigned long n;
>  long l;
>  int i;
>
>  setbuf (stdout, NULL);
>  atexit (cleanup);
>  handler_orig = signal (SIGABRT, handler);
>  assert (handler_orig == SIG_DFL);
>  handler_orig = signal (SIGINT, handler);
>  assert (handler_orig == SIG_DFL);
>
>  child = fork ();
>  switch (child)
>    {
>      case -1:
>	abort ();
>      case 0:
>	i = raise (SIGSTOP);
>	assert (i == 0);
>
>	abort ();
>	/* NOTREACHED */
>      default:
>        break;
>    }
>
>  for (n = 0 ;; n++)
>    {
>      pid_t got_pid;
>      int status;
>
>      l = ptrace (PTRACE_ATTACH, child, NULL, NULL);
>      assert (l == 0);
>
>      i = tkill (child, SIGCONT);
>      assert (i == 0);
>
>      got_pid = waitpid (child, &status, 0);
>      assert (got_pid == child);
>      assert (WIFSTOPPED (status));
>      assert (WSTOPSIG (status) == SIGCONT);
>
>      i = tkill (child, SIGSTOP);
>      assert (i == 0);
>
>      l = ptrace (PTRACE_CONT, child, NULL, NULL);
>      assert (l == 0);
>
>      got_pid = waitpid (child, &status, 0);
>      assert (got_pid == child);
>      assert (WIFSTOPPED (status));
>      assert (WSTOPSIG (status) == SIGSTOP);
>
>      l = ptrace (PTRACE_DETACH, child, NULL, (void *) (unsigned long) SIGSTOP);
>      assert (l == 0);
>    }
>  /* NOTREACHED */
>}

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Attachments on bug 244162: 156968 | 156970 | 156975 | 157288 | 212881 | 212891 | 212901