1  /*
       2   * Check decoding of sigprocmask 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_sigprocmask
      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_sigprocmask(const kernel_ulong_t how, const kernel_ulong_t new_set,
      26  	      const kernel_ulong_t old_set)
      27  {
      28  	const long rc = syscall(__NR_sigprocmask, how, new_set, old_set);
      29  	errstr = sprintrc(rc);
      30  	return rc;
      31  }
      32  
      33  int
      34  main(void)
      35  {
      36  	static const kernel_ulong_t sig_block =
      37  		(kernel_ulong_t) 0xfacefeed00000000ULL | SIG_BLOCK;
      38  	static const kernel_ulong_t sig_unblock =
      39  		(kernel_ulong_t) 0xfacefeed00000000ULL | SIG_UNBLOCK;
      40  	static const kernel_ulong_t sig_setmask =
      41  		(kernel_ulong_t) 0xfacefeed00000000ULL | SIG_SETMASK;
      42  
      43  	if (k_sigprocmask(sig_setmask, 0, 0))
      44  		perror_msg_and_skip("sigprocmask");
      45  	puts("sigprocmask(SIG_SETMASK, NULL, NULL) = 0");
      46  
      47  	TAIL_ALLOC_OBJECT_CONST_PTR(kernel_ulong_t, new_set);
      48  	TAIL_ALLOC_OBJECT_CONST_PTR(kernel_ulong_t, old_set);
      49  	TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
      50  
      51  	memset(new_set, 0, sizeof(*new_set));
      52  	k_sigprocmask(sig_setmask, (uintptr_t) new_set, 0);
      53  	printf("sigprocmask(SIG_SETMASK, [], NULL) = %s\n", errstr);
      54  
      55  	k_sigprocmask(sig_unblock,
      56  		      (uintptr_t) (new_set - 1), (uintptr_t) old_set);
      57  	puts("sigprocmask(SIG_UNBLOCK, ~[], []) = 0");
      58  
      59  	if (F8ILL_KULONG_SUPPORTED) {
      60  		k_sigprocmask(sig_unblock, f8ill_ptr_to_kulong(new_set), 0);
      61  		printf("sigprocmask(SIG_UNBLOCK, %#jx, NULL) = %s\n",
      62  		       (uintmax_t) f8ill_ptr_to_kulong(new_set), errstr);
      63  
      64  		k_sigprocmask(sig_unblock, 0, f8ill_ptr_to_kulong(old_set));
      65  		printf("sigprocmask(SIG_UNBLOCK, NULL, %#jx) = %s\n",
      66  		       (uintmax_t) f8ill_ptr_to_kulong(old_set), errstr);
      67  	}
      68  
      69  	sigemptyset(libc_set);
      70  	sigaddset(libc_set, SIGHUP);
      71  	memcpy(new_set, libc_set, sizeof(*new_set));
      72  
      73  	k_sigprocmask(sig_block, (uintptr_t) new_set, (uintptr_t) old_set);
      74  	puts("sigprocmask(SIG_BLOCK, [HUP], []) = 0");
      75  
      76  	memset(libc_set, -1, sizeof(*libc_set));
      77  	sigdelset(libc_set, SIGHUP);
      78  	memcpy(new_set, libc_set, sizeof(*new_set));
      79  
      80  	k_sigprocmask(sig_unblock, (uintptr_t) new_set, (uintptr_t) old_set);
      81  	puts("sigprocmask(SIG_UNBLOCK, ~[HUP], [HUP]) = 0");
      82  
      83  	sigdelset(libc_set, SIGKILL);
      84  	memcpy(new_set, libc_set, sizeof(*new_set));
      85  
      86  	k_sigprocmask(sig_unblock, (uintptr_t) new_set, (uintptr_t) old_set);
      87  	puts("sigprocmask(SIG_UNBLOCK, ~[HUP KILL], [HUP]) = 0");
      88  
      89  	sigemptyset(libc_set);
      90  	sigaddset(libc_set, SIGHUP);
      91  	sigaddset(libc_set, SIGINT);
      92  	sigaddset(libc_set, SIGQUIT);
      93  	sigaddset(libc_set, SIGALRM);
      94  	sigaddset(libc_set, SIGTERM);
      95  	memcpy(new_set, libc_set, sizeof(*new_set));
      96  
      97  	k_sigprocmask(sig_block, (uintptr_t) new_set, (uintptr_t) old_set);
      98  	printf("sigprocmask(SIG_BLOCK, %s, [HUP]) = 0\n",
      99  	       "[HUP INT QUIT ALRM TERM]");
     100  
     101  	k_sigprocmask(sig_setmask, 0, (uintptr_t) old_set);
     102  	printf("sigprocmask(SIG_SETMASK, NULL, %s) = 0\n",
     103  	       "[HUP INT QUIT ALRM TERM]");
     104  
     105  	k_sigprocmask(sig_setmask, (uintptr_t) (new_set + 1), 0);
     106  	printf("sigprocmask(SIG_SETMASK, %p, NULL) = %s\n",
     107  	       new_set + 1, errstr);
     108  
     109  	k_sigprocmask(sig_setmask,
     110  		      (uintptr_t) new_set, (uintptr_t) (old_set + 1));
     111  	printf("sigprocmask(SIG_SETMASK, %s, %p) = %s\n",
     112  	       "[HUP INT QUIT ALRM TERM]", old_set + 1, errstr);
     113  
     114  	uintptr_t efault = sizeof(*new_set) / 2 + (uintptr_t) new_set;
     115  
     116  	k_sigprocmask(sig_setmask, efault, 0);
     117  	printf("sigprocmask(SIG_SETMASK, %#jx, NULL) = %s\n",
     118  	       (uintmax_t) efault, errstr);
     119  
     120  	k_sigprocmask(sig_setmask, 0, efault);
     121  	printf("sigprocmask(SIG_SETMASK, NULL, %#jx) = %s\n",
     122  	       (uintmax_t) efault, errstr);
     123  
     124  	puts("+++ exited with 0 +++");
     125  	return 0;
     126  }
     127  
     128  #else
     129  
     130  SKIP_MAIN_UNDEFINED("__NR_sigprocmask")
     131  
     132  #endif