Attachment 203591 Details for Bug 289411 – `attachstopped.c' testcase to triage the kernel bug without TotalView.

`attachstopped.c' testcase to triage the kernel bug without TotalView.

attachstopped.c (text/plain), 1.50 KB, created by Jan Kratochvil on 2007-09-23 22:44:20 UTC

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Creator: Jan Kratochvil

Created: 2007-09-23 22:44:20 UTC

Size: 1.50 KB

patch

obsolete

>/*
>kill (21773, sig 19) = 0
>PTRACE_ATTACH (21773, 0x0, 0x0) = 0x0
>wait4 (21773, 0x40000002) = (status 0x3c) -512
>PTRACE_CONT (21773, 0x0, 0x0) = -3 (ESRCH)
> */
>#define _GNU_SOURCE
>#include <assert.h>
>#include <unistd.h>
>#include <sys/wait.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <sys/ptrace.h>
>#include <stddef.h>
>#include <errno.h>
>#include <sys/types.h>
>#include <string.h>
>
>static pid_t child;
>
>static void
>cleanup (void)
>{
>  if (child != 0)
>    kill (child, SIGKILL);
>}
>
>static void
>handler_fail (int signo)
>{
>  long l;
>
>  signal (SIGABRT, SIG_DFL);
>
>  l = ptrace (PTRACE_CONT, child, NULL, NULL);
>  if (l != 0)
>    fprintf (stderr, "PTRACE_CONT: errno = %d\n", errno);
>
>  cleanup ();
>
>  abort ();
>}
>
>static pid_t waiton (pid_t pid, int *status_return)
>{
>  pid_t got_pid;
>
>  assert (pid > 0 || pid == -1);
>
>  got_pid = waitpid (pid, status_return, WUNTRACED | __WALL);
>  assert (pid == -1 || got_pid == pid);
>  return got_pid;
>}
>
>int main (void)
>{
>  int i, status;
>  long l;
>
>  atexit (cleanup);
>  signal (SIGABRT, handler_fail);
>  signal (SIGINT, handler_fail);
>  signal (SIGALRM, handler_fail);
>
>  alarm (2);
>
>  child = fork ();
>  switch (child)
>    {
>      case -1:
>	assert (0);
>      case 0:
>	for (;;)
>	  pause();
>	/* NOTREACHED */
>	assert (0);
>      default:
>	break;
>    }
>
>  i = kill (child, SIGSTOP);
>  assert (i == 0);
>
>  sleep (1);
>
>  l = ptrace (PTRACE_ATTACH, child, NULL, NULL);
>  assert (l == 0);
>
>  waiton (child, &status);
>  assert (WIFSTOPPED (status));
>  assert (WSTOPSIG (status) == SIGSTOP);
>
>  return 0;
>}

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