Attachment 150476 Details for Bug 232837 – Testcase for kernel-2.6.20-1.2935.rm2.fc6: second PTRACE_ATTACH

Testcase for kernel-2.6.20-1.2935.rm2.fc6: second PTRACE_ATTACH

attachstop.c (text/plain), 2.45 KB, created by Jan Kratochvil on 2007-03-20 12:26:47 UTC

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Filename:

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Creator: Jan Kratochvil

Created: 2007-03-20 12:26:47 UTC

Size: 2.45 KB

patch

obsolete

>#include <unistd.h>
>#include <assert.h>
>#include <stdlib.h>
>#include <signal.h>
>#include <errno.h>
>#include <error.h>
>#include <stdio.h>
>#include <sys/ptrace.h>
>#include <sys/types.h>
>#include <sys/wait.h>
>
>
>static void
>child_f (void)
>{
>  raise (SIGSTOP);
>  abort ();
>  /* NOTREACHED */
>}
>
>static pid_t child_pid;
>
>static const char *handler_state;
>
>static void
>handler (int signo)
>{
>  kill (child_pid, SIGKILL);
>  //  abort ();
>  fprintf (stderr, "timeout: %s\n", handler_state);
>  exit (1);
>}
>
>static unsigned char regs[0x10000];
>
>static void attach (const char *state)
>{
>  int i;
>  int status;
>
>  handler_state = state;
>  signal (SIGALRM, handler);
>  alarm (1);
>
>  i = ptrace (PTRACE_ATTACH, child_pid, NULL, NULL);
>  //assert (i == 0);
>  if (i != 0) error (1, errno, "PTRACE_ATTACH");
>  i = waitpid (child_pid, &status, 0);
>  //  assert (i == child_pid);
>  if (i != child_pid) {
>    if (-1 == i)  error (1, errno, "waitpid");
>    else {
>      fprintf (stderr, "waitpid pid mismatch\n");
>      exit (1);
>    }
>  }
>  //  assert (WIFSTOPPED (status) != 0);
>  if (WIFSTOPPED (status) == 0) {
>    fprintf (stderr, "WIFSTOPPED false\n");
>    exit (1);
>  }
>  //  assert (WSTOPSIG (status) == SIGSTOP);
>  if (WSTOPSIG (status) != SIGSTOP) {
>    fprintf (stderr, "WSTOPSIG !- SIGSTOP\n");
>    exit (1);
>  }
>
>  alarm (0);
>}
>
>int main (void)
>{
>  int i;
>
>  child_pid = fork();
>  switch (child_pid)
>    {
>      case -1:
>        perror ("fork()");
>	exit (1);
>	/* NOTREACHED */
>      case 0:
>        child_f ();
>	/* NOTREACHED */
>      default:;
>	/* PASSTHRU */
>    }
>  /* Parent.  */
>
>  sleep (1);
>
>  /* Buggy:
>  kernel-xen-2.6.19-1.2898.2.3.fc7.i686
>  kernel-2.6.20-1.2925.fc6.i586
>  kernel-2.6.20-1.2928.rm1.fc6.x86_64
>     Fixed:
>  kernel-2.6.20-1.2935.rm1.fc6.x86_64
>  kernel-2.6.20-1.2935.rm2.fc6.x86_64
>  */
>  attach ("first PTRACE_ATTACH");
>
>  /* Buggy:
>  kernel-2.6.20-1.2935.rm1.fc6.x86_64
>     Fixed:
>  kernel-2.6.20-1.2935.rm2.fc6.x86_64
>  */
>  errno = 0;
>  ptrace (PTRACE_PEEKUSER, child_pid, NULL, NULL);
>  //assert (errno == 0);
>  if (errno != 0) error (1, errno, "PTRACE_PEEKUSER");
>  i = ptrace (PTRACE_GETREGS, child_pid, NULL, regs);
>  //assert (i == 0);
>  if (i != 0) error (1, errno, "PTRACE_GETREGS");
>  
>  i = ptrace (PTRACE_DETACH, child_pid, NULL, NULL);
>  //assert (i == 0);
>  if (i != 0) error (1, errno, "PTRACE_DETACH");
>
>  /* Buggy:
>  kernel-2.6.20-1.2935.rm2.fc6.x86_64
>  */
>  attach ("second PTRACE_ATTACH");
>
>  //  puts ("OK");
>  kill (child_pid, SIGKILL);
>  //return 0;
>  exit (0);
>}

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Attachments on bug 232837: 150336 | 150448 | 150449 | 150476 | 180921