On Sun, 01 Dec 2013 18:50:33 +0100, Jan Kratochvil wrote:
> --- /dev/null
> +++ b/tests/backtrace-child.c
[...]
> +int
> +main (int argc UNUSED, char **argv)
> +{
> + setbuf (stdout, NULL);
> + assert (*argv++);
> + ptraceme = (*argv && strcmp (*argv, "--ptraceme") == 0);
> + argv += ptraceme;
> + gencore = (*argv && strcmp (*argv, "--gencore") == 0);
> + argv += gencore;
> + assert (!*argv);
> + /* These dummy* functions are there so that each of their surrounding
> + functions has some unrelated code around. The purpose of some of the
> + tests is verify unwinding the very first / after the very last
> instruction
> + does not inappropriately slip into the unrelated code around. */
> + dummy1 ();
> + dummy2 ();
> + dummy3 ();
> + dummy4 ();
> + if (gencore)
> + printf ("%ld\n", (long) getpid ());
> + errno = 0;
> + pthread_t thread;
> + int i = pthread_create (&thread, NULL, start, NULL);
> + assert_perror (errno);
BTW I randomly got here on F-19 x86_64:
backtrace-child: backtrace-child.c:207: main: Unexpected error: Cannot allocate
memory.
But I do not have it reproducible and I cannot figure out how that could
happen.
> + assert (i == 0);
> + if (ptraceme)
> + {
> + long l = ptrace (PTRACE_TRACEME, 0, NULL, NULL);
> + assert_perror (errno);
> + assert (l == 0);
> + }
> + if (gencore)
> + pthread_join (thread, NULL);
> + else
> + raise (SIGUSR2);
> + /* Not reached. */
> + abort ();
> +}
Jan
