1 /* 2 * Copyright (c) 2017 Juniper Networks. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 /* 27 * Copyright 2018 Nexenta Systems, Inc. 28 */ 29 30 #define __STDC_WANT_LIB_EXT1__ 1 31 32 #include "lint.h" 33 34 #include <sys/types.h> 35 #include <errno.h> 36 #include <stddef.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <synch.h> 40 #include <thread.h> 41 #include <unistd.h> 42 43 #include "libc.h" 44 45 /* 46 * Rationale recommends allocating new memory each time. 47 */ 48 static constraint_handler_t *_ch = NULL; 49 static mutex_t ch_lock = ERRORCHECKMUTEX; 50 51 constraint_handler_t 52 set_constraint_handler_s(constraint_handler_t handler) 53 { 54 constraint_handler_t *new, *old, ret; 55 56 new = malloc(sizeof (constraint_handler_t)); 57 if (new == NULL) 58 return (NULL); 59 *new = handler; 60 mutex_enter(&ch_lock); 61 old = _ch; 62 _ch = new; 63 mutex_exit(&ch_lock); 64 if (old == NULL) { 65 ret = NULL; 66 } else { 67 ret = *old; 68 free(old); 69 } 70 return (ret); 71 } 72 73 /*ARGSUSED*/ 74 void 75 abort_handler_s(const char *_RESTRICT_KYWD msg, 76 void *_RESTRICT_KYWD ptr, errno_t error) 77 { 78 common_panic("abort_handler_s: ", msg); 79 } 80 81 /*ARGSUSED*/ 82 void 83 ignore_handler_s(const char *_RESTRICT_KYWD msg, 84 void *_RESTRICT_KYWD ptr, errno_t error) 85 { 86 } 87 88 void 89 __throw_constraint_handler_s(const char *_RESTRICT_KYWD msg, errno_t error) 90 { 91 constraint_handler_t ch; 92 93 mutex_enter(&ch_lock); 94 ch = (_ch != NULL) ? *_ch : NULL; 95 mutex_exit(&ch_lock); 96 if (ch != NULL) { 97 ch(msg, NULL, error); 98 } else { 99 /* 100 * If current handler is NULL (there were no calls to 101 * set_constraint_handler_s(), or it was called with NULL 102 * pointer handler argument), call default constraint handler 103 * per K.3.6.1.1 points 4 and 5. 104 * 105 * This implementation defines abort_handler_s() as default. 106 */ 107 abort_handler_s(msg, NULL, error); 108 } 109 } 110