| 1 | /* zmalloc - total amount of allocated memory aware version of malloc() |
| 2 | * |
| 3 | * Copyright (c) 2006-2009, Salvatore Sanfilippo <antirez at gmail dot com> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright notice, |
| 10 | * this list of conditions and the following disclaimer. |
| 11 | * * Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * * Neither the name of Redis nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without |
| 16 | * specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <string.h> |
| 34 | #include "config.h" |
| 35 | |
| 36 | #if defined(__sun) |
| 37 | #define PREFIX_SIZE sizeof(long long) |
| 38 | #else |
| 39 | #define PREFIX_SIZE sizeof(size_t) |
| 40 | #endif |
| 41 | |
| 42 | static size_t used_memory = 0; |
| 43 | |
| 44 | static void zmalloc_oom(size_t size) { |
| 45 | fprintf(stderr, "zmalloc: Out of memory trying to allocate %zu bytes\n", |
| 46 | size); |
| 47 | fflush(stderr); |
| 48 | abort(); |
| 49 | } |
| 50 | |
| 51 | void *zmalloc(size_t size) { |
| 52 | void *ptr = malloc(size+PREFIX_SIZE); |
| 53 | |
| 54 | if (!ptr) zmalloc_oom(size); |
| 55 | #ifdef HAVE_MALLOC_SIZE |
| 56 | used_memory += redis_malloc_size(ptr); |
| 57 | return ptr; |
| 58 | #else |
| 59 | *((size_t*)ptr) = size; |
| 60 | used_memory += size+PREFIX_SIZE; |
| 61 | return (char*)ptr+PREFIX_SIZE; |
| 62 | #endif |
| 63 | } |
| 64 | |
| 65 | void *zrealloc(void *ptr, size_t size) { |
| 66 | #ifndef HAVE_MALLOC_SIZE |
| 67 | void *realptr; |
| 68 | #endif |
| 69 | size_t oldsize; |
| 70 | void *newptr; |
| 71 | |
| 72 | if (ptr == NULL) return zmalloc(size); |
| 73 | #ifdef HAVE_MALLOC_SIZE |
| 74 | oldsize = redis_malloc_size(ptr); |
| 75 | newptr = realloc(ptr,size); |
| 76 | if (!newptr) zmalloc_oom(size); |
| 77 | |
| 78 | used_memory -= oldsize; |
| 79 | used_memory += redis_malloc_size(newptr); |
| 80 | return newptr; |
| 81 | #else |
| 82 | realptr = (char*)ptr-PREFIX_SIZE; |
| 83 | oldsize = *((size_t*)realptr); |
| 84 | newptr = realloc(realptr,size+PREFIX_SIZE); |
| 85 | if (!newptr) zmalloc_oom(size); |
| 86 | |
| 87 | *((size_t*)newptr) = size; |
| 88 | used_memory -= oldsize; |
| 89 | used_memory += size; |
| 90 | return (char*)newptr+PREFIX_SIZE; |
| 91 | #endif |
| 92 | } |
| 93 | |
| 94 | void zfree(void *ptr) { |
| 95 | #ifndef HAVE_MALLOC_SIZE |
| 96 | void *realptr; |
| 97 | size_t oldsize; |
| 98 | #endif |
| 99 | |
| 100 | if (ptr == NULL) return; |
| 101 | #ifdef HAVE_MALLOC_SIZE |
| 102 | used_memory -= redis_malloc_size(ptr); |
| 103 | free(ptr); |
| 104 | #else |
| 105 | realptr = (char*)ptr-PREFIX_SIZE; |
| 106 | oldsize = *((size_t*)realptr); |
| 107 | used_memory -= oldsize+PREFIX_SIZE; |
| 108 | free(realptr); |
| 109 | #endif |
| 110 | } |
| 111 | |
| 112 | char *zstrdup(const char *s) { |
| 113 | size_t l = strlen(s)+1; |
| 114 | char *p = zmalloc(l); |
| 115 | |
| 116 | memcpy(p,s,l); |
| 117 | return p; |
| 118 | } |
| 119 | |
| 120 | size_t zmalloc_used_memory(void) { |
| 121 | return used_memory; |
| 122 | } |