1 /*
2 * malloc-like functions for system emulation.
3 *
4 * Copyright (c) 2006 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu-common.h"
25 #include <stdlib.h>
26
qemu_free(void * ptr)27 void qemu_free(void *ptr)
28 {
29 //trace_qemu_free(ptr);
30 free(ptr);
31 }
32
allow_zero_malloc(void)33 static int allow_zero_malloc(void)
34 {
35 #if defined(CONFIG_ZERO_MALLOC)
36 return 1;
37 #else
38 return 0;
39 #endif
40 }
41
qemu_malloc(size_t size)42 void *qemu_malloc(size_t size)
43 {
44 void *ptr;
45 if (!size && !allow_zero_malloc()) {
46 abort();
47 }
48 ptr = qemu_oom_check(malloc(size ? size : 1));
49 //trace_qemu_malloc(size, ptr);
50 return ptr;
51 }
52
qemu_realloc(void * ptr,size_t size)53 void *qemu_realloc(void *ptr, size_t size)
54 {
55 void *newptr;
56 if (!size && !allow_zero_malloc()) {
57 abort();
58 }
59 newptr = qemu_oom_check(realloc(ptr, size ? size : 1));
60 //trace_qemu_realloc(ptr, size, newptr);
61 return newptr;
62 }
63
qemu_mallocz(size_t size)64 void *qemu_mallocz(size_t size)
65 {
66 void *ptr;
67 if (!size && !allow_zero_malloc()) {
68 abort();
69 }
70 ptr = qemu_oom_check(calloc(1, size ? size : 1));
71 //trace_qemu_malloc(size, ptr);
72 return ptr;
73 }
74
qemu_strdup(const char * str)75 char *qemu_strdup(const char *str)
76 {
77 char *ptr;
78 size_t len = strlen(str);
79 ptr = qemu_malloc(len + 1);
80 memcpy(ptr, str, len + 1);
81 return ptr;
82 }
83
qemu_strndup(const char * str,size_t size)84 char *qemu_strndup(const char *str, size_t size)
85 {
86 const char *end = memchr(str, 0, size);
87 char *new;
88
89 if (end) {
90 size = end - str;
91 }
92
93 new = qemu_malloc(size + 1);
94 new[size] = 0;
95
96 return memcpy(new, str, size);
97 }
98