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 35 void *get_mmap_addr(unsigned long size) 36 { 37 return NULL; 38 } 39 40 void qemu_free(void *ptr) 41 { 42 free(ptr); 43 } 44 45 static int allow_zero_malloc(void) 46 { 47 #if defined(CONFIG_ZERO_MALLOC) 48 return 1; 49 #else 50 return 0; 51 #endif 52 } 53 54 void *qemu_malloc(size_t size) 55 { 56 if (!size && !allow_zero_malloc()) { 57 abort(); 58 } 59 return oom_check(malloc(size ? size : 1)); 60 } 61 62 void *qemu_realloc(void *ptr, size_t size) 63 { 64 if (size) { 65 return oom_check(realloc(ptr, size)); 66 } else if (allow_zero_malloc()) { 67 return oom_check(realloc(ptr, size ? size : 1)); 68 } 69 abort(); 70 } 71 72 void *qemu_mallocz(size_t size) 73 { 74 void *ptr; 75 ptr = qemu_malloc(size); 76 memset(ptr, 0, size); 77 return ptr; 78 } 79 80 char *qemu_strdup(const char *str) 81 { 82 char *ptr; 83 size_t len = strlen(str); 84 ptr = qemu_malloc(len + 1); 85 memcpy(ptr, str, len + 1); 86 return ptr; 87 } 88 89 char *qemu_strndup(const char *str, size_t size) 90 { 91 const char *end = memchr(str, 0, size); 92 char *new; 93 94 if (end) { 95 size = end - str; 96 } 97 98 new = qemu_malloc(size + 1); 99 new[size] = 0; 100 101 return memcpy(new, str, size); 102 } 103