1  /*
       2   * Check decoding of sigpending syscall.
       3   *
       4   * Copyright (c) 2016-2018 Dmitry V. Levin <ldv@strace.io>
       5   * Copyright (c) 2017-2021 The strace developers.
       6   * All rights reserved.
       7   *
       8   * SPDX-License-Identifier: GPL-2.0-or-later
       9   */
      10  
      11  #include "tests.h"
      12  #include "scno.h"
      13  
      14  #ifdef __NR_sigpending
      15  
      16  # include <signal.h>
      17  # include <stdint.h>
      18  # include <stdio.h>
      19  # include <string.h>
      20  # include <unistd.h>
      21  
      22  static const char *errstr;
      23  
      24  static long
      25  k_sigpending(const kernel_ulong_t set)
      26  {
      27  	const long rc = syscall(__NR_sigpending, set);
      28  	errstr = sprintrc(rc);
      29  	return rc;
      30  }
      31  
      32  int
      33  main(void)
      34  {
      35  	TAIL_ALLOC_OBJECT_CONST_PTR(kernel_ulong_t, k_set);
      36  	TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
      37  
      38  	sigemptyset(libc_set);
      39  	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
      40  		perror_msg_and_fail("sigprocmask");
      41  
      42  	if (k_sigpending((uintptr_t) libc_set))
      43  		perror_msg_and_skip("sigpending");
      44  	else
      45  		puts("sigpending([]) = 0");
      46  
      47  	k_sigpending((uintptr_t) k_set);
      48  	puts("sigpending([]) = 0");
      49  
      50  	k_sigpending((uintptr_t) (k_set + 1));
      51  	printf("sigpending(%p) = -1 EFAULT (%m)\n", k_set + 1);
      52  
      53  	uintptr_t efault = sizeof(*k_set) / 2 + (uintptr_t) k_set;
      54  	k_sigpending(efault);
      55  	printf("sigpending(%#jx) = -1 EFAULT (%m)\n", (uintmax_t) efault);
      56  
      57  	sigaddset(libc_set, SIGHUP);
      58  	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
      59  		perror_msg_and_fail("sigprocmask");
      60  	raise(SIGHUP);
      61  
      62  	k_sigpending((uintptr_t) k_set);
      63  	puts("sigpending([HUP]) = 0");
      64  
      65  	sigaddset(libc_set, SIGINT);
      66  	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
      67  		perror_msg_and_fail("sigprocmask");
      68  	raise(SIGINT);
      69  
      70  	k_sigpending((uintptr_t) k_set);
      71  	puts("sigpending([HUP INT]) = 0");
      72  
      73  	if (F8ILL_KULONG_SUPPORTED) {
      74  		k_sigpending(f8ill_ptr_to_kulong(k_set));
      75  		printf("sigpending(%#jx) = %s\n",
      76  		       (uintmax_t) f8ill_ptr_to_kulong(k_set), errstr);
      77  	}
      78  
      79  	puts("+++ exited with 0 +++");
      80  	return 0;
      81  }
      82  
      83  #else
      84  
      85  SKIP_MAIN_UNDEFINED("__NR_sigpending")
      86  
      87  #endif