David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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 | |
| 27 | static void *oom_check(void *ptr) |
| 28 | { |
| 29 | if (ptr == NULL) { |
| 30 | abort(); |
| 31 | } |
| 32 | return ptr; |
| 33 | } |
| 34 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 35 | void qemu_free(void *ptr) |
| 36 | { |
| 37 | free(ptr); |
| 38 | } |
| 39 | |
David 'Digit' Turner | 2910f18 | 2010-05-10 18:48:35 -0700 | [diff] [blame] | 40 | static int allow_zero_malloc(void) |
| 41 | { |
| 42 | #if defined(CONFIG_ZERO_MALLOC) |
| 43 | return 1; |
| 44 | #else |
| 45 | return 0; |
| 46 | #endif |
| 47 | } |
| 48 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 49 | void *qemu_malloc(size_t size) |
| 50 | { |
David 'Digit' Turner | 2910f18 | 2010-05-10 18:48:35 -0700 | [diff] [blame] | 51 | if (!size && !allow_zero_malloc()) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 52 | abort(); |
| 53 | } |
David 'Digit' Turner | 2910f18 | 2010-05-10 18:48:35 -0700 | [diff] [blame] | 54 | return oom_check(malloc(size ? size : 1)); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | void *qemu_realloc(void *ptr, size_t size) |
| 58 | { |
David Turner | d7e3529 | 2010-09-10 00:26:54 +0200 | [diff] [blame] | 59 | if (!size && !allow_zero_malloc()) { |
| 60 | abort(); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 61 | } |
David Turner | d7e3529 | 2010-09-10 00:26:54 +0200 | [diff] [blame] | 62 | return oom_check(realloc(ptr, size ? size : 1)); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | void *qemu_mallocz(size_t size) |
| 66 | { |
David Turner | d7e3529 | 2010-09-10 00:26:54 +0200 | [diff] [blame] | 67 | if (!size && !allow_zero_malloc()) { |
| 68 | abort(); |
| 69 | } |
| 70 | return oom_check(calloc(1, size ? size : 1)); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | char *qemu_strdup(const char *str) |
| 74 | { |
| 75 | char *ptr; |
| 76 | size_t len = strlen(str); |
| 77 | ptr = qemu_malloc(len + 1); |
| 78 | memcpy(ptr, str, len + 1); |
| 79 | return ptr; |
| 80 | } |
| 81 | |
| 82 | char *qemu_strndup(const char *str, size_t size) |
| 83 | { |
| 84 | const char *end = memchr(str, 0, size); |
| 85 | char *new; |
| 86 | |
| 87 | if (end) { |
| 88 | size = end - str; |
| 89 | } |
| 90 | |
| 91 | new = qemu_malloc(size + 1); |
| 92 | new[size] = 0; |
| 93 | |
| 94 | return memcpy(new, str, size); |
| 95 | } |