gistfile1.m

@implementation CJTestCJCard
     
- (void)setUpClass {
    // swap the release implementations
    Method releaseMethod = class_getInstanceMethod([NSObject class],
                                                   @selector(release));
    Method releaseLogMethod = class_getInstanceMethod([NSObject class],
                                                      @selector(releaseLog));
    
    IMP origReleaseImp = method_setImplementation(releaseMethod,
                            method_getImplementation(releaseLogMethod));
    method_setImplementation(releaseLogMethod, origReleaseImp);
    
    // do the same for autorelease
    Method autoreleaseMethod = class_getInstanceMethod([NSObject class],
                                                   @selector(autorelease));
    Method autoreleaseLogMethod = class_getInstanceMethod([NSObject class],
                                                   @selector(autoreleaseLog));
    
    IMP origAutoReleaseImp = method_setImplementation(autoreleaseMethod,
                            method_getImplementation(autoreleaseLogMethod));
    method_setImplementation(autoreleaseLogMethod, origAutoReleaseImp);
}