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 <[email protected]>
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
__thr_malloc_init(void)46 __thr_malloc_init(void)
47 {
48
49 if (npagesizes != 0)
50 return;
51 npagesizes = getpagesizes(pagesizes_d, nitems(pagesizes_d));
52 if (npagesizes == -1) {
53 npagesizes = 1;
54 pagesizes_d[0] = PAGE_SIZE;
55 }
56 pagesizes = pagesizes_d;
57 _thr_umutex_init(&thr_malloc_umtx);
58 }
59
60 static void
thr_malloc_lock(struct pthread * curthread)61 thr_malloc_lock(struct pthread *curthread)
62 {
63
64 if (curthread == NULL)
65 return;
66 curthread->locklevel++;
67 _thr_umutex_lock(&thr_malloc_umtx, TID(curthread));
68 }
69
70 static void
thr_malloc_unlock(struct pthread * curthread)71 thr_malloc_unlock(struct pthread *curthread)
72 {
73
74 if (curthread == NULL)
75 return;
76 _thr_umutex_unlock(&thr_malloc_umtx, TID(curthread));
77 curthread->locklevel--;
78 _thr_ast(curthread);
79 }
80
81 void *
__thr_calloc(size_t num,size_t size)82 __thr_calloc(size_t num, size_t size)
83 {
84 struct pthread *curthread;
85 void *res;
86
87 curthread = _get_curthread();
88 thr_malloc_lock(curthread);
89 res = __crt_calloc(num, size);
90 thr_malloc_unlock(curthread);
91 return (res);
92 }
93
94 void
__thr_free(void * cp)95 __thr_free(void *cp)
96 {
97 struct pthread *curthread;
98
99 curthread = _get_curthread();
100 thr_malloc_lock(curthread);
101 __crt_free(cp);
102 thr_malloc_unlock(curthread);
103 }
104
105 void *
__thr_malloc(size_t nbytes)106 __thr_malloc(size_t nbytes)
107 {
108 struct pthread *curthread;
109 void *res;
110
111 curthread = _get_curthread();
112 thr_malloc_lock(curthread);
113 res = __crt_malloc(nbytes);
114 thr_malloc_unlock(curthread);
115 return (res);
116 }
117
118 void *
__thr_realloc(void * cp,size_t nbytes)119 __thr_realloc(void *cp, size_t nbytes)
120 {
121 struct pthread *curthread;
122 void *res;
123
124 curthread = _get_curthread();
125 thr_malloc_lock(curthread);
126 res = __crt_realloc(cp, nbytes);
127 thr_malloc_unlock(curthread);
128 return (res);
129 }
130
131 void
__thr_malloc_prefork(struct pthread * curthread)132 __thr_malloc_prefork(struct pthread *curthread)
133 {
134
135 _thr_umutex_lock(&thr_malloc_umtx, TID(curthread));
136 }
137
138 void
__thr_malloc_postfork(struct pthread * curthread)139 __thr_malloc_postfork(struct pthread *curthread)
140 {
141
142 _thr_umutex_unlock(&thr_malloc_umtx, TID(curthread));
143 }
144