1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/process/memory_unittest_mac.h"
6
7#import <Foundation/Foundation.h>
8#include <CoreFoundation/CoreFoundation.h>
9
10#if !defined(ARCH_CPU_64_BITS)
11
12// In the 64-bit environment, the Objective-C 2.0 Runtime Reference states
13// that sizeof(anInstance) is constrained to 32 bits. That's not necessarily
14// "psychotically big" and in fact a 64-bit program is expected to be able to
15// successfully allocate an object that large, likely reserving a good deal of
16// swap space. The only way to test the behavior of memory exhaustion for
17// Objective-C allocation in this environment would be to loop over allocation
18// of these large objects, but that would slowly consume all available memory
19// and cause swap file proliferation. That's bad, so this behavior isn't
20// tested in the 64-bit environment.
21
22@interface PsychoticallyBigObjCObject : NSObject
23{
24  // In the 32-bit environment, the compiler limits Objective-C objects to
25  // < 2GB in size.
26  int justUnder2Gigs_[(2U * 1024 * 1024 * 1024 - 1) / sizeof(int)];
27}
28
29@end
30
31@implementation PsychoticallyBigObjCObject
32
33@end
34
35namespace base {
36
37void* AllocatePsychoticallyBigObjCObject() {
38  return [[PsychoticallyBigObjCObject alloc] init];
39}
40
41}  // namespace base
42
43#endif  // ARCH_CPU_64_BITS
44
45namespace base {
46
47void* AllocateViaCFAllocatorSystemDefault(ssize_t size) {
48  return CFAllocatorAllocate(kCFAllocatorSystemDefault, size, 0);
49}
50
51void* AllocateViaCFAllocatorMalloc(ssize_t size) {
52  return CFAllocatorAllocate(kCFAllocatorMalloc, size, 0);
53}
54
55void* AllocateViaCFAllocatorMallocZone(ssize_t size) {
56  return CFAllocatorAllocate(kCFAllocatorMallocZone, size, 0);
57}
58
59}  // namespace base
60