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39 lines
1004 B
39 lines
1004 B
// This test verifies that dispatch_sync() doesn't actually copy the block under TSan (without TSan, it doesn't).
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// RUN: %clang_tsan %s -o %t_no_tsan -framework Foundation -fno-sanitize=thread
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// RUN: %clang_tsan %s -o %t_with_tsan -framework Foundation
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// RUN: %run %t_no_tsan 2>&1 | FileCheck %s
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// RUN: %run %t_with_tsan 2>&1 | FileCheck %s
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#import <Foundation/Foundation.h>
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@interface MyClass : NSObject
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@end
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@implementation MyClass
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- (instancetype)retain {
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// Copying the dispatch_sync'd block below will increment the retain count of
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// this object. Abort if that happens.
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abort();
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}
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@end
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int main(int argc, const char* argv[]) {
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dispatch_queue_t q = dispatch_queue_create("my.queue", NULL);
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id object = [[MyClass alloc] init];
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void (^block)(void) = ^ {
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NSLog(@"%@", object);
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};
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dispatch_sync(q, ^{
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NSLog(@"%@", object);
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});
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dispatch_sync(q, block);
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[object release];
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NSLog(@"Done.");
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return 0;
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}
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// CHECK: Done.
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// CHECK-NOT: WARNING: ThreadSanitizer
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