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| // This test verifies that dispatch_sync() doesn't actually copy the block under TSan (without TSan, it doesn't).
// RUN: %clang_tsan %s -o %t_no_tsan -framework Foundation -fno-sanitize=thread
// RUN: %clang_tsan %s -o %t_with_tsan -framework Foundation
// RUN: %run %t_no_tsan 2>&1 | FileCheck %s
// RUN: %run %t_with_tsan 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
@interface MyClass : NSObject
@end
@implementation MyClass
- (instancetype)retain {
// Copying the dispatch_sync'd block below will increment the retain count of
// this object. Abort if that happens.
abort();
}
@end
int main(int argc, const char* argv[]) {
dispatch_queue_t q = dispatch_queue_create("my.queue", NULL);
id object = [[MyClass alloc] init];
void (^block)(void) = ^ {
NSLog(@"%@", object);
};
dispatch_sync(q, ^{
NSLog(@"%@", object);
});
dispatch_sync(q, block);
[object release];
NSLog(@"Done.");
return 0;
}
// CHECK: Done.
// CHECK-NOT: WARNING: ThreadSanitizer
|