granicus.if.org Git - strace/blob - tests/ppoll.c

   1 /*
   2  * Check decoding of ppoll syscall.
   3  *
   4  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "tests.h"
  31 #include <asm/unistd.h>
  32
  33 #ifdef __NR_ppoll
  34
  35 # include <errno.h>
  36 # include <poll.h>
  37 # include <signal.h>
  38 # include <stdio.h>
  39 # include <string.h>
  40 # include <unistd.h>
  41
  42 static const char *errstr;
  43
  44 static long
  45 sys_ppoll(const kernel_ulong_t ufds,
  46           const kernel_ulong_t nfds,
  47           const kernel_ulong_t tsp,
  48           const kernel_ulong_t sigmask,
  49           const kernel_ulong_t sigsetsize)
  50 {
  51         long rc = syscall(__NR_ppoll, ufds, nfds, tsp, sigmask, sigsetsize);
  52         errstr = sprintrc(rc);
  53         return rc;
  54 }
  55
  56 int
  57 main(void)
  58 {
  59         static const kernel_ulong_t bogus_nfds =
  60                 (kernel_ulong_t) 0xdeadbeeffacefeedULL;
  61         static const kernel_ulong_t bogus_sigsetsize =
  62                 (kernel_ulong_t) 0xdeadbeefbadc0dedULL;
  63         static const char *const POLLWRNORM_str =
  64                 (POLLWRNORM == POLLOUT) ? "" : "|POLLWRNORM";
  65         static const char *const USR2_CHLD_str =
  66                 (SIGUSR2 < SIGCHLD) ? "USR2 CHLD" : "CHLD USR2";
  67         void *const efault = tail_alloc(1024) + 1024;
  68         TAIL_ALLOC_OBJECT_CONST_PTR(struct timespec, ts);
  69         const unsigned int sigset_size = get_sigset_size();
  70         void *const sigmask = tail_alloc(sigset_size);
  71         struct pollfd *fds;
  72         sigset_t mask;
  73         int pipe_fd[4];
  74         long rc;
  75
  76         sys_ppoll(0, bogus_nfds, 0, 0, bogus_sigsetsize);
  77         if (ENOSYS == errno)
  78                 perror_msg_and_skip("ppoll");
  79         printf("ppoll(NULL, %u, NULL, NULL, %llu) = %s\n",
  80                (unsigned) bogus_nfds, (unsigned long long) bogus_sigsetsize,
  81                errstr);
  82
  83         sys_ppoll((unsigned long) efault, 42, (unsigned long) efault + 8,
  84                   (unsigned long) efault + 16, sigset_size);
  85         printf("ppoll(%p, %u, %p, %p, %u) = %s\n",
  86                efault, 42, efault + 8, efault + 16, sigset_size, errstr);
  87
  88         if (pipe(pipe_fd) || pipe(pipe_fd + 2))
  89                 perror_msg_and_fail("pipe");
  90
  91         ts->tv_sec = 42;
  92         ts->tv_nsec = 999999999;
  93
  94         const struct pollfd fds1[] = {
  95                 { .fd = pipe_fd[0], .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND },
  96                 { .fd = pipe_fd[1], .events = POLLOUT | POLLWRNORM | POLLWRBAND },
  97                 { .fd = pipe_fd[2], .events = POLLIN | POLLPRI },
  98                 { .fd = pipe_fd[3], .events = POLLOUT }
  99         };
 100         fds = efault - sizeof(fds1);
 101         memcpy(fds, fds1, sizeof(fds1));
 102
 103         sigemptyset(&mask);
 104         sigaddset(&mask, SIGUSR2);
 105         sigaddset(&mask, SIGCHLD);
 106         memcpy(sigmask, &mask, sigset_size);
 107
 108         rc = sys_ppoll((unsigned long) fds,
 109                        F8ILL_KULONG_MASK | ARRAY_SIZE(fds1), (unsigned long) ts,
 110                        (unsigned long) sigmask, sigset_size);
 111         if (rc != 2)
 112                 perror_msg_and_fail("ppoll 1");
 113         printf("ppoll([{fd=%d, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}"
 114                ", {fd=%d, events=POLLOUT%s|POLLWRBAND}"
 115 #if VERBOSE
 116                ", {fd=%d, events=POLLIN|POLLPRI}, {fd=%d, events=POLLOUT}]"
 117 #else
 118                ", ...]"
 119 #endif
 120                ", %u, {tv_sec=42, tv_nsec=999999999}, [%s], %u) = %ld"
 121                " ([{fd=%d, revents=POLLOUT%s}, {fd=%d, revents=POLLOUT}]"
 122                ", left {tv_sec=%u, tv_nsec=%u})\n",
 123                pipe_fd[0], pipe_fd[1], POLLWRNORM_str,
 124 #if VERBOSE
 125                pipe_fd[2], pipe_fd[3],
 126 #endif
 127                (unsigned) ARRAY_SIZE(fds1), USR2_CHLD_str,
 128                (unsigned) sigset_size, rc, pipe_fd[1], POLLWRNORM_str,
 129                pipe_fd[3], (unsigned ) ts->tv_sec, (unsigned) ts->tv_nsec);
 130
 131         ts->tv_sec = 0;
 132         ts->tv_nsec = 999;
 133         const struct pollfd fds2[] = {
 134                 { .fd = pipe_fd[1], .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND },
 135                 { .fd = pipe_fd[0], .events = POLLOUT | POLLWRNORM | POLLWRBAND }
 136         };
 137         fds = efault - sizeof(fds2);
 138         memcpy(fds, fds2, sizeof(fds2));
 139
 140         memset(&mask, -1, sizeof(mask));
 141         sigdelset(&mask, SIGHUP);
 142         sigdelset(&mask, SIGKILL);
 143         sigdelset(&mask, SIGSTOP);
 144         memcpy(sigmask, &mask, sigset_size);
 145
 146         rc = sys_ppoll((unsigned long) fds,
 147                        F8ILL_KULONG_MASK | ARRAY_SIZE(fds2), (unsigned long) ts,
 148                        (unsigned long) sigmask, sigset_size);
 149         if (rc != 0)
 150                 perror_msg_and_fail("ppoll 2");
 151         printf("ppoll([{fd=%d, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}"
 152                ", {fd=%d, events=POLLOUT%s|POLLWRBAND}], %u"
 153                ", {tv_sec=0, tv_nsec=999}, ~[HUP KILL STOP], %u)"
 154                " = %ld (Timeout)\n",
 155                pipe_fd[1], pipe_fd[0], POLLWRNORM_str,
 156                (unsigned) ARRAY_SIZE(fds2), sigset_size, rc);
 157
 158         if (F8ILL_KULONG_SUPPORTED) {
 159                 sys_ppoll(f8ill_ptr_to_kulong(fds), ARRAY_SIZE(fds2),
 160                           f8ill_ptr_to_kulong(ts), f8ill_ptr_to_kulong(sigmask),
 161                           sigset_size);
 162                 printf("ppoll(%#llx, %u, %#llx, %#llx, %u) = %s\n",
 163                        (unsigned long long) f8ill_ptr_to_kulong(fds),
 164                        (unsigned) ARRAY_SIZE(fds2),
 165                        (unsigned long long) f8ill_ptr_to_kulong(ts),
 166                        (unsigned long long) f8ill_ptr_to_kulong(sigmask),
 167                        (unsigned) sigset_size, errstr);
 168         }
 169
 170         puts("+++ exited with 0 +++");
 171         return 0;
 172 }
 173
 174 #else
 175
 176 SKIP_MAIN_UNDEFINED("__NR_ppoll")
 177
 178 #endif