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Commit | Line | Data |
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17e2377a PB |
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" | |
cd245a19 | 25 | #include "trace.h" |
8a1d02ab AL |
26 | #include <stdlib.h> |
27 | ||
17e2377a PB |
28 | void qemu_free(void *ptr) |
29 | { | |
cd245a19 | 30 | trace_qemu_free(ptr); |
17e2377a PB |
31 | free(ptr); |
32 | } | |
33 | ||
20ff6c80 AL |
34 | static int allow_zero_malloc(void) |
35 | { | |
36 | #if defined(CONFIG_ZERO_MALLOC) | |
37 | return 1; | |
38 | #else | |
39 | return 0; | |
40 | #endif | |
41 | } | |
42 | ||
17e2377a PB |
43 | void *qemu_malloc(size_t size) |
44 | { | |
cd245a19 | 45 | void *ptr; |
20ff6c80 | 46 | if (!size && !allow_zero_malloc()) { |
a7d27b53 | 47 | abort(); |
26d64a85 | 48 | } |
b152aa84 | 49 | ptr = qemu_oom_check(malloc(size ? size : 1)); |
cd245a19 SH |
50 | trace_qemu_malloc(size, ptr); |
51 | return ptr; | |
17e2377a PB |
52 | } |
53 | ||
2137b4cc TS |
54 | void *qemu_realloc(void *ptr, size_t size) |
55 | { | |
cd245a19 | 56 | void *newptr; |
f8b0953b MA |
57 | if (!size && !allow_zero_malloc()) { |
58 | abort(); | |
a7d27b53 | 59 | } |
b152aa84 | 60 | newptr = qemu_oom_check(realloc(ptr, size ? size : 1)); |
cd245a19 SH |
61 | trace_qemu_realloc(ptr, size, newptr); |
62 | return newptr; | |
2137b4cc TS |
63 | } |
64 | ||
17e2377a PB |
65 | void *qemu_mallocz(size_t size) |
66 | { | |
50401022 RH |
67 | if (!size && !allow_zero_malloc()) { |
68 | abort(); | |
69 | } | |
b152aa84 | 70 | return qemu_oom_check(calloc(1, size ? size : 1)); |
17e2377a PB |
71 | } |
72 | ||
73 | char *qemu_strdup(const char *str) | |
74 | { | |
75 | char *ptr; | |
363a37d5 BS |
76 | size_t len = strlen(str); |
77 | ptr = qemu_malloc(len + 1); | |
ac4b0d0c | 78 | memcpy(ptr, str, len + 1); |
17e2377a PB |
79 | return ptr; |
80 | } | |
ac4b0d0c AZ |
81 | |
82 | char *qemu_strndup(const char *str, size_t size) | |
83 | { | |
84 | const char *end = memchr(str, 0, size); | |
85 | char *new; | |
86 | ||
26d64a85 | 87 | if (end) { |
ac4b0d0c | 88 | size = end - str; |
26d64a85 | 89 | } |
ac4b0d0c AZ |
90 | |
91 | new = qemu_malloc(size + 1); | |
92 | new[size] = 0; | |
93 | ||
94 | return memcpy(new, str, size); | |
95 | } |