root / qemu-malloc.c @ a1f0cce2
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1 | 17e2377a | pbrook | /*
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2 | 17e2377a | pbrook | * malloc-like functions for system emulation.
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3 | 17e2377a | pbrook | *
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4 | 17e2377a | pbrook | * Copyright (c) 2006 Fabrice Bellard
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5 | 17e2377a | pbrook | *
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6 | 17e2377a | pbrook | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 17e2377a | pbrook | * of this software and associated documentation files (the "Software"), to deal
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8 | 17e2377a | pbrook | * in the Software without restriction, including without limitation the rights
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9 | 17e2377a | pbrook | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 17e2377a | pbrook | * copies of the Software, and to permit persons to whom the Software is
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11 | 17e2377a | pbrook | * furnished to do so, subject to the following conditions:
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12 | 17e2377a | pbrook | *
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13 | 17e2377a | pbrook | * The above copyright notice and this permission notice shall be included in
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14 | 17e2377a | pbrook | * all copies or substantial portions of the Software.
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15 | 17e2377a | pbrook | *
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16 | 17e2377a | pbrook | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 17e2377a | pbrook | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 17e2377a | pbrook | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 17e2377a | pbrook | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 17e2377a | pbrook | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 17e2377a | pbrook | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 17e2377a | pbrook | * THE SOFTWARE.
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23 | 17e2377a | pbrook | */
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24 | 17e2377a | pbrook | #include "qemu-common.h" |
25 | cd245a19 | Stefan Hajnoczi | #include "trace.h" |
26 | 8a1d02ab | aliguori | #include <stdlib.h> |
27 | 8a1d02ab | aliguori | |
28 | 17e2377a | pbrook | void qemu_free(void *ptr) |
29 | 17e2377a | pbrook | { |
30 | cd245a19 | Stefan Hajnoczi | trace_qemu_free(ptr); |
31 | 17e2377a | pbrook | free(ptr); |
32 | 17e2377a | pbrook | } |
33 | 17e2377a | pbrook | |
34 | 20ff6c80 | Anthony Liguori | static int allow_zero_malloc(void) |
35 | 20ff6c80 | Anthony Liguori | { |
36 | 20ff6c80 | Anthony Liguori | #if defined(CONFIG_ZERO_MALLOC)
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37 | 20ff6c80 | Anthony Liguori | return 1; |
38 | 20ff6c80 | Anthony Liguori | #else
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39 | 20ff6c80 | Anthony Liguori | return 0; |
40 | 20ff6c80 | Anthony Liguori | #endif
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41 | 20ff6c80 | Anthony Liguori | } |
42 | 20ff6c80 | Anthony Liguori | |
43 | 17e2377a | pbrook | void *qemu_malloc(size_t size)
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44 | 17e2377a | pbrook | { |
45 | cd245a19 | Stefan Hajnoczi | void *ptr;
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46 | 20ff6c80 | Anthony Liguori | if (!size && !allow_zero_malloc()) {
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47 | a7d27b53 | malc | abort(); |
48 | 26d64a85 | malc | } |
49 | b152aa84 | Jes Sorensen | ptr = qemu_oom_check(malloc(size ? size : 1));
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50 | cd245a19 | Stefan Hajnoczi | trace_qemu_malloc(size, ptr); |
51 | cd245a19 | Stefan Hajnoczi | return ptr;
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52 | 17e2377a | pbrook | } |
53 | 17e2377a | pbrook | |
54 | 2137b4cc | ths | void *qemu_realloc(void *ptr, size_t size) |
55 | 2137b4cc | ths | { |
56 | cd245a19 | Stefan Hajnoczi | void *newptr;
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57 | f8b0953b | Markus Armbruster | if (!size && !allow_zero_malloc()) {
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58 | f8b0953b | Markus Armbruster | abort(); |
59 | a7d27b53 | malc | } |
60 | b152aa84 | Jes Sorensen | newptr = qemu_oom_check(realloc(ptr, size ? size : 1));
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61 | cd245a19 | Stefan Hajnoczi | trace_qemu_realloc(ptr, size, newptr); |
62 | cd245a19 | Stefan Hajnoczi | return newptr;
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63 | 2137b4cc | ths | } |
64 | 2137b4cc | ths | |
65 | 17e2377a | pbrook | void *qemu_mallocz(size_t size)
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66 | 17e2377a | pbrook | { |
67 | 236e2376 | Jes Sorensen | void *ptr;
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68 | 50401022 | Richard Henderson | if (!size && !allow_zero_malloc()) {
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69 | 50401022 | Richard Henderson | abort(); |
70 | 50401022 | Richard Henderson | } |
71 | 236e2376 | Jes Sorensen | ptr = qemu_oom_check(calloc(1, size ? size : 1)); |
72 | 236e2376 | Jes Sorensen | trace_qemu_malloc(size, ptr); |
73 | 236e2376 | Jes Sorensen | return ptr;
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74 | 17e2377a | pbrook | } |
75 | 17e2377a | pbrook | |
76 | 17e2377a | pbrook | char *qemu_strdup(const char *str) |
77 | 17e2377a | pbrook | { |
78 | 17e2377a | pbrook | char *ptr;
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79 | 363a37d5 | blueswir1 | size_t len = strlen(str); |
80 | 363a37d5 | blueswir1 | ptr = qemu_malloc(len + 1);
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81 | ac4b0d0c | balrog | memcpy(ptr, str, len + 1);
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82 | 17e2377a | pbrook | return ptr;
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83 | 17e2377a | pbrook | } |
84 | ac4b0d0c | balrog | |
85 | ac4b0d0c | balrog | char *qemu_strndup(const char *str, size_t size) |
86 | ac4b0d0c | balrog | { |
87 | ac4b0d0c | balrog | const char *end = memchr(str, 0, size); |
88 | ac4b0d0c | balrog | char *new;
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89 | ac4b0d0c | balrog | |
90 | 26d64a85 | malc | if (end) {
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91 | ac4b0d0c | balrog | size = end - str; |
92 | 26d64a85 | malc | } |
93 | ac4b0d0c | balrog | |
94 | ac4b0d0c | balrog | new = qemu_malloc(size + 1);
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95 | ac4b0d0c | balrog | new[size] = 0;
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96 | ac4b0d0c | balrog | |
97 | ac4b0d0c | balrog | return memcpy(new, str, size);
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98 | ac4b0d0c | balrog | } |