enumerate_references.m [plain text]
/*
* Copyright (c) 2009 Apple Inc. All rights reserved.
*
* @APPLE_APACHE_LICENSE_HEADER_START@
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @APPLE_APACHE_LICENSE_HEADER_END@
*/
#import <Foundation/Foundation.h>
#import <auto_zone.h>
// CONFIG GC -C99 -lauto
@interface TestObject : NSObject {
TestObject *link;
}
@property(retain) TestObject *link;
@end
@implementation TestObject
@synthesize link;
- (void)dealloc {
[link release];
[super dealloc];
}
@end
int Counter = 0;
NSMutableArray *Referers;
int Errors = 0;
void callback(auto_zone_t *zone, void *ctx, auto_reference_t reference) {
++Counter;
if (![Referers containsObject:(id)reference.referrer_base]) {
++Errors;
printf("didn't find referrer }
//printf("callback zone //zone, ctx, reference.referent, reference.referrer_base, reference.referrer_offset);
}
int testResults() {
TestObject *to = [[TestObject alloc] init];
//printf("reference: // set up an array with 10 objects that refer to "to"
Referers = [[NSMutableArray alloc] init];
for (int i = 0; i < 10; ++i) {
TestObject *two = [[TestObject alloc] init];
two.link = to;
[Referers addObject:two];
[two release];
//printf(" }
//printf("\n");
// now enumerate the heap looking for referents
int counter = 0;
auto_enumerate_references(
(auto_zone_t *)[[NSGarbageCollector defaultCollector] zone],
to,
callback,
__builtin_frame_address(0), // stackbottom
NULL); // ctx
if (Counter != 10) {
printf("wanted 10 but only found return 1;
}
return Errors;
}
int main(int argc, char *argv[]) {
int result = testResults();
if (result == 0) printf(" else printf("Failure\n");
return result;
}