1/* 2 * Copyright (c) 2009 Apple Inc. All rights reserved. 3 * 4 * @APPLE_APACHE_LICENSE_HEADER_START@ 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 * @APPLE_APACHE_LICENSE_HEADER_END@ 19 */ 20// 21// weakstack.m 22// gctests 23// 24// Created by Blaine Garst on 11/3/08. 25// Copyright 2008 __MyCompanyName__. All rights reserved. 26// 27 28 29// CONFIG GC -C99 30 31#import <Foundation/Foundation.h> 32#import <objc/objc-auto.h> 33 34enum { 35 magic = 10 36}; 37 38void doCollect() { 39 int array[magic]; 40 for (int i = 0; i < magic; ++i) 41 array[i] = -1; 42 NSGarbageCollector *collector = [NSGarbageCollector defaultCollector]; 43 [collector collectIfNeeded]; 44 [collector collectExhaustively]; 45 for (int i = 0; i < magic; ++i) { 46 if (array[i] != -1) { 47 printf("stack was cleared!!!\n"); 48 exit(1); 49 } 50 } 51} 52 53void registerStackLocation(int i) { 54 int array[i]; 55 id x = nil; 56 //printf("address of x is %p\n", x); 57 objc_assign_weak([NSObject new], &x); // allowed, but broken 58} 59 60void testFunction() { 61 for (int i = 0; i < magic; ++i) { 62 registerStackLocation(i); 63 } 64 doCollect(); 65} 66 67int main(int argc, char *argv[]) { 68 testFunction(); 69 printf("%s: success\n", argv[0]); 70 return 0; 71} 72 73 74 75