1 /* 2 * This file is part of rt_sigsuspend strace test. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * Copyright (c) 2016-2017 The strace developers. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "tests.h" 32 #include <asm/unistd.h> 33 34 #ifdef __NR_rt_sigsuspend 35 36 # include <assert.h> 37 # include <errno.h> 38 # include <signal.h> 39 # include <stdio.h> 40 # include <stdint.h> 41 # include <string.h> 42 # include <unistd.h> 43 44 static long 45 k_sigsuspend(const sigset_t *const set, const unsigned long size) 46 { 47 return syscall(__NR_rt_sigsuspend, set, size); 48 } 49 50 static void 51 iterate(const char *const text, const int sig, 52 const void *const set, unsigned int size) 53 { 54 const void *mask; 55 56 for (mask = set;; size >>= 1, mask += size) { 57 raise(sig); 58 assert(k_sigsuspend(mask, size) == -1); 59 if (EINTR == errno) { 60 tprintf("rt_sigsuspend(%s, %u) = ? ERESTARTNOHAND" 61 " (To be restarted if no handler)\n", 62 text, size); 63 } else { 64 if (size < sizeof(long)) 65 tprintf("rt_sigsuspend(%p, %u)" 66 " = -1 EINVAL (%m)\n", 67 mask, size); 68 else 69 tprintf("rt_sigsuspend(%s, %u)" 70 " = -1 EINVAL (%m)\n", 71 set == mask ? text : "~[]", size); 72 } 73 if (!size) 74 break; 75 } 76 } 77 78 static void 79 handler(int signo) 80 { 81 } 82 83 int 84 main(void) 85 { 86 tprintf("%s", ""); 87 88 const unsigned int big_size = 1024 / 8; 89 void *k_set = tail_alloc(big_size); 90 memset(k_set, 0, big_size); 91 92 TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set); 93 sigemptyset(libc_set); 94 sigaddset(libc_set, SIGUSR1); 95 if (sigprocmask(SIG_SETMASK, libc_set, NULL)) 96 perror_msg_and_fail("sigprocmask"); 97 98 const struct sigaction sa = { 99 .sa_handler = handler 100 }; 101 if (sigaction(SIGUSR1, &sa, NULL)) 102 perror_msg_and_fail("sigaction"); 103 104 raise(SIGUSR1); 105 unsigned int set_size = big_size; 106 for (; set_size; set_size >>= 1, k_set += set_size) { 107 assert(k_sigsuspend(k_set, set_size) == -1); 108 if (EINTR == errno) 109 break; 110 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n", 111 k_set, set_size); 112 } 113 if (!set_size) 114 perror_msg_and_fail("rt_sigsuspend"); 115 tprintf("rt_sigsuspend([], %u) = ? ERESTARTNOHAND" 116 " (To be restarted if no handler)\n", set_size); 117 118 sigemptyset(libc_set); 119 sigaddset(libc_set, SIGUSR2); 120 memcpy(k_set, libc_set, set_size); 121 raise(SIGUSR1); 122 assert(k_sigsuspend(k_set, set_size) == -1); 123 assert(EINTR == errno); 124 tprintf("rt_sigsuspend([USR2], %u) = ? ERESTARTNOHAND" 125 " (To be restarted if no handler)\n", set_size); 126 127 sigaddset(libc_set, SIGHUP); 128 memcpy(k_set, libc_set, set_size); 129 raise(SIGUSR1); 130 assert(k_sigsuspend(k_set, set_size) == -1); 131 assert(EINTR == errno); 132 tprintf("rt_sigsuspend([HUP USR2], %u) = ? ERESTARTNOHAND" 133 " (To be restarted if no handler)\n", set_size); 134 135 sigaddset(libc_set, SIGINT); 136 memcpy(k_set, libc_set, set_size); 137 raise(SIGUSR1); 138 assert(k_sigsuspend(k_set, set_size) == -1); 139 assert(EINTR == errno); 140 tprintf("rt_sigsuspend([HUP INT USR2], %u) = ? ERESTARTNOHAND" 141 " (To be restarted if no handler)\n", set_size); 142 143 memset(libc_set, -1, sizeof(*libc_set)); 144 sigdelset(libc_set, SIGUSR1); 145 memcpy(k_set, libc_set, set_size); 146 raise(SIGUSR1); 147 assert(k_sigsuspend(k_set, set_size) == -1); 148 assert(EINTR == errno); 149 tprintf("rt_sigsuspend(~[USR1], %u) = ? ERESTARTNOHAND" 150 " (To be restarted if no handler)\n", set_size); 151 152 assert(k_sigsuspend(k_set - set_size, set_size << 1) == -1); 153 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n", 154 k_set - set_size, set_size << 1); 155 156 iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1); 157 158 tprintf("+++ exited with 0 +++\n"); 159 return 0; 160 } 161 162 #else 163 164 SKIP_MAIN_UNDEFINED("__NR_rt_sigsuspend") 165 166 #endif 167
