/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <pthread.h>

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

static int fd[4];

static pthread_barrier_t b;

volatile int in_sh_body;

unsigned long cleanups;

static void

cl (void *arg)

{

  cleanups = (cleanups << 4) | (long) arg;

}

static void __attribute__((noinline))

sh_body (void)

{

  char c;

  pthread_cleanup_push (cl, (void *) 1L);

  in_sh_body = 1;

  if (read (fd[2], &c, 1) == 1)

    {

      puts ("read succeeded");

      exit (1);

    }

  pthread_cleanup_pop (0);

}

static void

sh (int sig)

{

  pthread_cleanup_push (cl, (void *) 2L);

  sh_body ();

  in_sh_body = 0;

  pthread_cleanup_pop (0);

}

static void __attribute__((noinline))

tf_body (void)

{

  char c;

  pthread_cleanup_push (cl, (void *) 3L);

  int r = pthread_barrier_wait (&b);

  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("child thread: barrier_wait failed");

      exit (1);

    }

  if (read (fd[0], &c, 1) == 1)

    {

      puts ("read succeeded");

      exit (1);

    }

  read (fd[0], &c, 1);

  pthread_cleanup_pop (0);

}

static void *

tf (void *arg)

{

  pthread_cleanup_push (cl, (void *) 4L);

  tf_body ();

  pthread_cleanup_pop (0);

  return NULL;

}

static int

do_one_test (void)

{

  in_sh_body = 0;

  cleanups = 0;

  if (pipe (fd) != 0 || pipe (fd + 2) != 0)

    {

      puts ("pipe failed");

      return 1;

    }

  pthread_t th;

  if (pthread_create (&th, NULL, tf, NULL) != 0)

    {

      puts ("create failed");

      return 1;

    }

  int r = pthread_barrier_wait (&b);

  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("parent thread: barrier_wait failed");

      return 1;

    }

  sleep (1);

  r = pthread_kill (th, SIGHUP);

  if (r)

    {

      errno = r;

      printf ("pthread_kill failed %m\n");

      return 1;

    }

  while (in_sh_body == 0)

    sleep (1);

  if (pthread_cancel (th) != 0)

    {

      puts ("cancel failed");

      return 1;

    }

  void *ret;

  if (pthread_join (th, &ret) != 0)

    {

      puts ("join failed");

      return 1;

    }

  if (ret != PTHREAD_CANCELED)

    {

      puts ("result is wrong");

      return 1;

    }

  if (cleanups != 0x1234L)

    {

      printf ("called cleanups %lx\n", cleanups);

      return 1;

    }

  /* The pipe closing must be issued after the cancellation handling to avoid

     a race condition where the cancellation runs after both pipe ends are

     closed.  In this case the read syscall returns EOF and the cancellation

     must not act.  */

  close (fd[0]);

  close (fd[1]);

  close (fd[2]);

  close (fd[3]);

  return 0;

}

static int

do_test (void)

{

  stack_t ss;

  ss.ss_sp = malloc (2 * SIGSTKSZ);

  if (ss.ss_sp == NULL)

    {

      puts ("failed to allocate alternate stack");

      return 1;

    }

  ss.ss_flags = 0;

  ss.ss_size = 2 * SIGSTKSZ;

  if (sigaltstack (&ss, NULL) < 0)

    {

      printf ("sigaltstack failed %m\n");

      return 1;

    }

  if (pthread_barrier_init (&b, NULL, 2) != 0)

    {

      puts ("barrier_init failed");

      return 1;

    }

  struct sigaction sa;

  sa.sa_handler = sh;

  sigemptyset (&sa.sa_mask);

  sa.sa_flags = 0;

  if (sigaction (SIGHUP, &sa, NULL) != 0)

    {

      puts ("sigaction failed");

      return 1;

    }

  puts ("sa_flags = 0 test");

  if (do_one_test ())

    return 1;

  sa.sa_handler = sh;

  sigemptyset (&sa.sa_mask);

  sa.sa_flags = SA_ONSTACK;

  if (sigaction (SIGHUP, &sa, NULL) != 0)

    {

      puts ("sigaction failed");

      return 1;

    }

  puts ("sa_flags = SA_ONSTACK test");

  if (do_one_test ())

    return 1;

#ifdef SA_SIGINFO

  sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;

  sigemptyset (&sa.sa_mask);

  sa.sa_flags = SA_SIGINFO;

  if (sigaction (SIGHUP, &sa, NULL) != 0)

    {

      puts ("sigaction failed");

      return 1;

    }

  puts ("sa_flags = SA_SIGINFO test");

  if (do_one_test ())

    return 1;

  sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;

  sigemptyset (&sa.sa_mask);

  sa.sa_flags = SA_SIGINFO | SA_ONSTACK;

  if (sigaction (SIGHUP, &sa, NULL) != 0)

    {

      puts ("sigaction failed");

      return 1;

    }

  puts ("sa_flags = SA_SIGINFO|SA_ONSTACK test");

  if (do_one_test ())

    return 1;

#endif

  return 0;

}

#define TIMEOUT 40

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"