1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2019 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/types.h> 36 #include <sys/mman.h> 37 #include <rtld_malloc.h> 38 #include "thr_private.h" 39 40 int npagesizes; 41 size_t *pagesizes; 42 static size_t pagesizes_d[2]; 43 static struct umutex thr_malloc_umtx; 44 45 void 46 __thr_malloc_init(void) 47 { 48 49 npagesizes = getpagesizes(pagesizes_d, nitems(pagesizes_d)); 50 if (npagesizes == -1) { 51 npagesizes = 1; 52 pagesizes_d[0] = PAGE_SIZE; 53 } 54 pagesizes = pagesizes_d; 55 _thr_umutex_init(&thr_malloc_umtx); 56 } 57 58 static void 59 thr_malloc_lock(struct pthread *curthread) 60 { 61 62 curthread->locklevel++; 63 _thr_umutex_lock(&thr_malloc_umtx, TID(curthread)); 64 } 65 66 static void 67 thr_malloc_unlock(struct pthread *curthread) 68 { 69 70 _thr_umutex_unlock(&thr_malloc_umtx, TID(curthread)); 71 curthread->locklevel--; 72 _thr_ast(curthread); 73 } 74 75 void * 76 __thr_calloc(size_t num, size_t size) 77 { 78 struct pthread *curthread; 79 void *res; 80 81 curthread = _get_curthread(); 82 thr_malloc_lock(curthread); 83 res = __crt_calloc(num, size); 84 thr_malloc_unlock(curthread); 85 return (res); 86 } 87 88 void 89 __thr_free(void *cp) 90 { 91 struct pthread *curthread; 92 93 curthread = _get_curthread(); 94 thr_malloc_lock(curthread); 95 __crt_free(cp); 96 thr_malloc_unlock(curthread); 97 } 98 99 void * 100 __thr_malloc(size_t nbytes) 101 { 102 struct pthread *curthread; 103 void *res; 104 105 curthread = _get_curthread(); 106 thr_malloc_lock(curthread); 107 res = __crt_malloc(nbytes); 108 thr_malloc_unlock(curthread); 109 return (res); 110 } 111 112 void * 113 __thr_realloc(void *cp, size_t nbytes) 114 { 115 struct pthread *curthread; 116 void *res; 117 118 curthread = _get_curthread(); 119 thr_malloc_lock(curthread); 120 res = __crt_realloc(cp, nbytes); 121 thr_malloc_unlock(curthread); 122 return (res); 123 } 124 125 void 126 __thr_malloc_prefork(struct pthread *curthread) 127 { 128 129 _thr_umutex_lock(&thr_malloc_umtx, TID(curthread)); 130 } 131 132 void 133 __thr_malloc_postfork(struct pthread *curthread) 134 { 135 136 _thr_umutex_unlock(&thr_malloc_umtx, TID(curthread)); 137 } 138