Dmitry V. Levin
c6782f144a
strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*
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* This file is part of rt_sigsuspend strace test.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2017 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef __NR_rt_sigsuspend
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# include <assert.h>
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# include <errno.h>
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# include <signal.h>
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# include <stdio.h>
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# include <stdint.h>
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# include <string.h>
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# include <unistd.h>
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static long
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k_sigsuspend(const sigset_t *const set, const unsigned long size)
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{
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return syscall(__NR_rt_sigsuspend, set, size);
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}
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static void
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iterate(const char *const text, const int sig,
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const void *const set, unsigned int size)
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{
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const void *mask;
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for (mask = set;; size >>= 1, mask += size) {
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raise(sig);
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assert(k_sigsuspend(mask, size) == -1);
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if (EINTR == errno) {
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tprintf("rt_sigsuspend(%s, %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n",
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text, size);
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} else {
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if (size < sizeof(long))
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tprintf("rt_sigsuspend(%p, %u)"
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" = -1 EINVAL (%m)\n",
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mask, size);
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else
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tprintf("rt_sigsuspend(%s, %u)"
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" = -1 EINVAL (%m)\n",
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set == mask ? text : "~[]", size);
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}
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if (!size)
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break;
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}
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}
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static void
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handler(int signo)
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{
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}
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int
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main(void)
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{
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tprintf("%s", "");
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const unsigned int big_size = 1024 / 8;
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void *k_set = tail_alloc(big_size);
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memset(k_set, 0, big_size);
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TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
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sigemptyset(libc_set);
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sigaddset(libc_set, SIGUSR1);
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if (sigprocmask(SIG_SETMASK, libc_set, NULL))
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perror_msg_and_fail("sigprocmask");
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const struct sigaction sa = {
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.sa_handler = handler
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};
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if (sigaction(SIGUSR1, &sa, NULL))
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perror_msg_and_fail("sigaction");
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raise(SIGUSR1);
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unsigned int set_size = big_size;
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for (; set_size; set_size >>= 1, k_set += set_size) {
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assert(k_sigsuspend(k_set, set_size) == -1);
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if (EINTR == errno)
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break;
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tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
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k_set, set_size);
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}
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if (!set_size)
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perror_msg_and_fail("rt_sigsuspend");
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tprintf("rt_sigsuspend([], %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", set_size);
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sigemptyset(libc_set);
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sigaddset(libc_set, SIGUSR2);
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memcpy(k_set, libc_set, set_size);
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raise(SIGUSR1);
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assert(k_sigsuspend(k_set, set_size) == -1);
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assert(EINTR == errno);
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tprintf("rt_sigsuspend([USR2], %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", set_size);
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sigaddset(libc_set, SIGHUP);
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memcpy(k_set, libc_set, set_size);
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raise(SIGUSR1);
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assert(k_sigsuspend(k_set, set_size) == -1);
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assert(EINTR == errno);
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tprintf("rt_sigsuspend([HUP USR2], %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", set_size);
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sigaddset(libc_set, SIGINT);
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memcpy(k_set, libc_set, set_size);
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raise(SIGUSR1);
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assert(k_sigsuspend(k_set, set_size) == -1);
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assert(EINTR == errno);
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tprintf("rt_sigsuspend([HUP INT USR2], %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", set_size);
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memset(libc_set, -1, sizeof(*libc_set));
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sigdelset(libc_set, SIGUSR1);
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memcpy(k_set, libc_set, set_size);
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raise(SIGUSR1);
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assert(k_sigsuspend(k_set, set_size) == -1);
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assert(EINTR == errno);
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tprintf("rt_sigsuspend(~[USR1], %u) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", set_size);
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assert(k_sigsuspend(k_set - set_size, set_size << 1) == -1);
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tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
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k_set - set_size, set_size << 1);
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iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1);
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tprintf("+++ exited with 0 +++\n");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_rt_sigsuspend")
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#endif
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