[apple/objc4.git] / test / badSuperclass.m

// TEST_CRASHES
/* 
TEST_RUN_OUTPUT
objc\[\d+\]: Memory corruption in class list\.
objc\[\d+\]: HALTED
END
*/

#include "test.h"
#include "testroot.i"

@interface Super : TestRoot @end
@implementation Super @end

@interface Sub : Super @end
@implementation Sub @end

int main()
{
    alarm(10);
    
    Class supercls = [Super class];
    Class subcls = [Sub class];
    id subobj __unused = [Sub alloc];

    // Create a cycle in a superclass chain (Sub->supercls == Sub)
    // then attempt to walk that chain. Runtime should halt eventually.
    _objc_flush_caches(supercls);
    ((Class __ptrauth_objc_super_pointer *)(__bridge void *)subcls)[1] = subcls;
#ifdef CACHE_FLUSH
    _objc_flush_caches(supercls);
#else
    [subobj class];
#endif
    
    fail("should have crashed");
}
Commit	Line	Data
13ba007e A	1	// TEST_CRASHES
	2	/*
	3	TEST_RUN_OUTPUT
	4	objc\[\d+\]: Memory corruption in class list\.
	5	objc\[\d+\]: HALTED
	6	END
	7	*/
	8
	9	#include "test.h"
	10	#include "testroot.i"
	11
	12	@interface Super : TestRoot @end
	13	@implementation Super @end
	14
	15	@interface Sub : Super @end
	16	@implementation Sub @end
	17
	18	int main()
	19	{
	20	alarm(10);
	21
	22	Class supercls = [Super class];
	23	Class subcls = [Sub class];
	24	id subobj __unused = [Sub alloc];
	25
	26	// Create a cycle in a superclass chain (Sub->supercls == Sub)
	27	// then attempt to walk that chain. Runtime should halt eventually.
	28	_objc_flush_caches(supercls);
34d5b5e8	29	((Class __ptrauth_objc_super_pointer )(__bridge void )subcls)[1] = subcls;
13ba007e A	30	#ifdef CACHE_FLUSH
	31	_objc_flush_caches(supercls);
	32	#else
	33	[subobj class];
	34	#endif
	35
	36	fail("should have crashed");
	37	}