Attachment 150130 Details for Bug 232371 – Testcase NOT reproducing anything.

Testcase NOT reproducing anything.

ptraceWCLONE.c (text/plain), 2.55 KB, created by Jan Kratochvil on 2007-03-15 15:06:32 UTC

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Creator: Jan Kratochvil

Created: 2007-03-15 15:06:32 UTC

Size: 2.55 KB

patch

obsolete

>#include <pthread.h>
>#include <unistd.h>
>#include <assert.h>
>#include <stdlib.h>
>#include <dirent.h>
>#include <signal.h>
>#include <errno.h>
>#include <stdio.h>
>#include <string.h>
>#include <sys/ptrace.h>
>#include <sys/types.h>
>#include <sys/wait.h>
>
>
>static void *
>child_thread_f (void *arg)
>{
>  for (;;)
>    pause ();
>  /* NOTREACHED */
>}
>
>static void
>child_f (void)
>{
>  pthread_t thread;
>  int i;
>
>  i = pthread_create (&thread, NULL, child_thread_f, NULL);
>  assert (i == 0);
>  i = pthread_join (thread, NULL);
>  abort ();
>  /* NOTREACHED */
>}
>
>static pid_t
>find_other_pid (pid_t main_pid)
>{
>  char buf[32];
>  int i;
>  DIR *dir;
>  struct dirent *dirent;
>  pid_t retval = 0;
>
>  i = snprintf (buf, sizeof(buf), "/proc/%d/task", (int) main_pid);
>  assert (i > 0);
>  dir = opendir (buf);
>  assert (dir != NULL);
>  while (errno = 0, (dirent = readdir (dir)) != NULL)
>    {
>      long pid_long;
>      char *endptr;
>
>      if (strcmp (dirent->d_name, ".") == 0)
>	continue;
>      if (strcmp (dirent->d_name, "..") == 0)
>	continue;
>      errno = 0;
>      pid_long = strtol (dirent->d_name, &endptr, 10);
>      assert (errno == 0);
>      assert (!endptr || !*endptr);
>      assert (pid_long > 0);
>      if (main_pid == pid_long)
>        continue;
>      assert (retval == 0);
>      retval = pid_long;
>    }
>  assert (errno == 0);
>  i = closedir (dir);
>  assert (i == 0);
>  return retval;
>}
>
>int main (void)
>{
>  pid_t child_pid;
>  pid_t child_thread_pid;
>  int i;
>  int status;
>  int errno_saved;
>
>  child_pid = fork();
>  switch (child_pid)
>    {
>      case -1:
>        perror ("fork()");
>	exit (1);
>	/* NOTREACHED */
>      case 0:
>        child_f ();
>	/* NOTREACHED */
>      default:;
>	/* PASSTHRU */
>    }
>  /* Parent.  */
>
>  i = ptrace (PTRACE_ATTACH, child_pid, NULL, NULL);
>  assert (i == 0);
>  i = waitpid (child_pid, &status, 0);
>  assert (i == child_pid);
>  assert (WIFSTOPPED (status) != 0);
>  assert (WSTOPSIG (status) == SIGSTOP);
>  child_thread_pid = find_other_pid (child_pid);
>
>  i = ptrace (PTRACE_SETOPTIONS, child_pid, NULL, (void *) 0x2);
>  assert (i == 0);
>  i = ptrace (PTRACE_SETOPTIONS, child_pid, NULL, (void *) 0x3e);
>  assert (i == 0);
>
>  i = ptrace (PTRACE_ATTACH, child_thread_pid, NULL, NULL);
>  assert (i == 0);
>  i = waitpid (child_thread_pid, &status, 0);
>  errno_saved = errno;
>  assert (i == -1);
>  assert (errno_saved == ECHILD);
>  i = waitpid (child_thread_pid, &status, __WCLONE);
>  assert (i == child_thread_pid);
>  assert (WIFSTOPPED (status) != 0);
>  assert (WSTOPSIG (status) == SIGSTOP);
>  
>  kill (child_pid, SIGKILL);
>  kill (child_thread_pid, SIGKILL);
>  puts ("OK");
>  return 0;
>}

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Attachments on bug 232371: 150130 | 150183 | 150546