File: gcd-sync-block-copy.mm

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (38 lines) | stat: -rw-r--r-- 1,004 bytes parent folder | download | duplicates (30) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
// 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