tprints(signame(nr));
}
-void
-print_sigset_addr_len(struct tcb *tcp, long addr, long len)
+static void
+print_sigset_addr_len_limit(struct tcb *tcp, long addr, long len, long min_len)
{
- char mask[NSIG / 8];
-
- /* Here len is usually equals NSIG / 8 or current_wordsize.
+ /*
+ * Here len is usually equal to NSIG / 8 or current_wordsize.
* But we code this defensively:
*/
- if (len < 0) {
+ if (len < min_len || len > NSIG / 8) {
printaddr(addr);
return;
}
- if (len >= NSIG / 8)
- len = NSIG / 8;
- else
- len = (len + 3) & ~3;
-
+ int mask[NSIG / 8 / sizeof(int)] = {};
if (umoven_or_printaddr(tcp, addr, len, mask))
return;
tprints(sprintsigmask_n("", mask, len));
}
+void
+print_sigset_addr_len(struct tcb *tcp, long addr, long len)
+{
+ print_sigset_addr_len_limit(tcp, addr, len, current_wordsize);
+}
+
SYS_FUNC(sigsetmask)
{
if (entering(tcp)) {
* This allows non-rt sigpending() syscall
* to reuse rt_sigpending() code in kernel.
*/
- print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
+ print_sigset_addr_len_limit(tcp, tcp->u_arg[0],
+ tcp->u_arg[1], 1);
tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
--- /dev/null
+/*
+ * This file is part of rt_sigpending strace test.
+ *
+ * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_rt_sigpending
+
+# include <assert.h>
+# include <signal.h>
+# include <stdio.h>
+# include <string.h>
+# include <unistd.h>
+
+static long
+k_sigpending(void *const set, const unsigned long size)
+{
+ return syscall(__NR_rt_sigpending, set, size);
+}
+
+static void
+iterate(const char *const text, unsigned int size, void *set)
+{
+ for (;;) {
+ if (k_sigpending(set, size))
+ perror_msg_and_fail("rt_sigpending");
+ if (size) {
+#if WORDS_BIGENDIAN
+ if (size < sizeof(long))
+ tprintf("rt_sigpending(%s, %u) = 0\n",
+ "[]", size);
+ else
+#endif
+ tprintf("rt_sigpending(%s, %u) = 0\n",
+ text, size);
+ } else {
+ tprintf("rt_sigpending(%p, %u) = 0\n", set, size);
+ break;
+ }
+ size >>= 1;
+ set += size;
+ }
+}
+
+int
+main(void)
+{
+ tprintf("%s", "");
+
+ const unsigned int big_size = 1024 / 8;
+ void *k_set = tail_alloc(big_size);
+ sigset_t *const libc_set = tail_alloc(sizeof(sigset_t));
+
+ sigemptyset(libc_set);
+ if (sigprocmask(SIG_SETMASK, libc_set, NULL))
+ perror_msg_and_fail("sigprocmask");
+
+ memset(k_set, 0, big_size);
+ unsigned int set_size = big_size;
+ for (; set_size; set_size >>= 1, k_set += set_size) {
+ if (!k_sigpending(k_set, set_size))
+ break;
+ tprintf("rt_sigpending(%p, %u) = -1 EINVAL (%m)\n",
+ k_set, set_size);
+ }
+ if (!set_size)
+ perror_msg_and_fail("rt_sigpending");
+ tprintf("rt_sigpending(%s, %u) = 0\n", "[]", set_size);
+
+ iterate("[]", set_size >> 1, k_set + (set_size >> 1));
+
+ void *const efault = k_set + (set_size >> 1);
+ assert(k_sigpending(efault, set_size) == -1);
+ tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
+ efault, set_size);
+
+ sigaddset(libc_set, SIGHUP);
+ if (sigprocmask(SIG_SETMASK, libc_set, NULL))
+ perror_msg_and_fail("sigprocmask");
+ raise(SIGHUP);
+
+ iterate("[HUP]", set_size, k_set);
+
+ sigaddset(libc_set, SIGINT);
+ if (sigprocmask(SIG_SETMASK, libc_set, NULL))
+ perror_msg_and_fail("sigprocmask");
+ raise(SIGINT);
+
+ iterate("[HUP INT]", set_size, k_set);
+
+ tprintf("+++ exited with 0 +++\n");
+ return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_rt_sigpending")
+
+#endif
projects / strace / commitdiff