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1 /*
2 * Copyright (c) 2005-2011 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24 #include <stdlib.h>
25 #include <stdint.h>
26 #include <string.h>
27 #include <stdbool.h>
28 #include <mach-o/dyld-interposing.h>
29 #include <malloc/malloc.h>
30
31 static void* seenAllocations[128];
32 static int seenAllocationIndex = 0;
33
34 // record each malloc result in a ring buffer
35 void* my_malloc(size_t size)
36 {
37 char* x = malloc(size);
38 seenAllocations[seenAllocationIndex++] = x;
39 seenAllocationIndex = (seenAllocationIndex & 127); //wrap around
40 return x;
41 }
42
43 DYLD_INTERPOSE(my_malloc, malloc)
44
45 bool allocationSeen(void* p)
46 {
47 for(int i=0; i < 127; ++i) {
48 if ( seenAllocations[i] == p )
49 return true;
50 }
51 return false;
52 }
53
54
55