CI Stack Crasher

stackcrasher.m

#import <Foundation/Foundation.h>
#import <QuartzCore/QuartzCore.h>

/*

 This example will create around 15k stack frames on 10.7, which ends up crashing the process.
 
 clang stackcrasher.m -o stackcrasher -framework Cocoa -framework QuartzCore -fobjc-arc

*/

int main (int argc, const char * argv[])
{

    @autoreleasepool {
        
        int height = 10;
        int max = 200;
        int idx = 0;
        
        NSURL *imageURL = [NSURL fileURLWithPath:@"/System/Library/Frameworks/AppKit.framework/Versions/C/Resources/NSTexturedFullScreenBackgroundColor.png"];
        
        CIImage *base = [CIImage imageWithContentsOfURL:imageURL];
        
        CIFilter *soFilter = [CIFilter filterWithName:@"CISourceOverCompositing"];
        
        while (idx < max) {
            
            CIImage *a = [CIImage imageWithContentsOfURL:imageURL];
            
            [soFilter setValue:base forKey:kCIInputBackgroundImageKey];
            [soFilter setValue:a forKey:kCIInputImageKey];
            
            base = [soFilter valueForKey:kCIOutputImageKey];
            
            idx++;
        }
        
        CIContext *ctx = [CIContext new];
        
        CGImageRef cgimg = [ctx createCGImage:base fromRect:NSMakeRect(0, 0, max, height)];
        
        NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:@"crasher.tiff"];
        
        CGImageDestinationRef imageDestination = CGImageDestinationCreateWithURL((__bridge CFURLRef)[NSURL fileURLWithPath:path], kUTTypeTIFF, 1, NULL);
        CGImageDestinationAddImage(imageDestination, cgimg, (__bridge CFDictionaryRef)[NSDictionary dictionary]);
        CGImageDestinationFinalize(imageDestination);
        CFRelease(imageDestination);
        
        CGImageRelease(cgimg);
        
        system([[NSString stringWithFormat:@"open %@", path] UTF8String]);
    }
    
    return 0;
}