/* 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 <sys/wait.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_t th = (pthread_t) arg; int r = pthread_barrier_wait (&b); if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD) { puts ("parent thread: barrier_wait failed"); exit (1); } sleep (1); r = pthread_kill (th, SIGHUP); if (r) { errno = r; printf ("pthread_kill failed %m\n"); exit (1); } while (in_sh_body == 0) sleep (1); if (pthread_cancel (th) != 0) { puts ("cancel failed"); exit (1); } void *ret; if (pthread_join (th, &ret) != 0) { puts ("join failed"); exit (1); } if (ret != PTHREAD_CANCELED) { puts ("result is wrong"); exit (1); } if (cleanups != 0x1234L) { printf ("called cleanups %lx\n", cleanups); exit (1); } if (pthread_barrier_destroy (&b)) { puts ("barrier destroy failed"); exit (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]); exit (0); } static int do_one_test (void) { in_sh_body = 0; pid_t pid = fork (); if (pid == -1) { printf ("fork failed: %m\n"); return 1; } if (pid) { int status; if (waitpid (pid, &status, 0) < 0) { printf ("waitpid failed %m\n"); return 1; } return !WIFEXITED (status) || WEXITSTATUS (status); } if (pthread_barrier_init (&b, NULL, 2) != 0) { puts ("barrier_init failed"); exit (1); } cleanups = 0; if (pipe (fd) != 0 || pipe (fd + 2) != 0) { puts ("pipe failed"); exit (1); } pthread_t th; if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0) { puts ("create failed"); exit (1); } pthread_cleanup_push (cl, (void *) 4L); tf_body (); pthread_cleanup_pop (0); exit (1); } 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; } 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"