| 1 | // RUN: %clangxx_tsan %s -o %t -framework Foundation -fobjc-arc |
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| 2 | // RUN: %run %t 6 2>&1 | FileCheck %s --check-prefix=SIX |
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| 3 | // RUN: not %run %t 7 2>&1 | FileCheck %s --check-prefix=SEVEN |
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| 4 | |
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| 5 | #import <Foundation/Foundation.h> |
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| 6 | |
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| 7 | static bool isTaggedPtr(id obj) { |
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| 8 | uintptr_t ptr = (uintptr_t) obj; |
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| 9 | return (ptr & 0x8000000000000001ull) != 0; |
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| 10 | } |
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| 11 | |
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| 12 | int main(int argc, char* argv[]) { |
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| 13 | assert(argc == 2); |
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| 14 | int arg = atoi(argv[1]); |
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| 15 | |
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| 16 | @autoreleasepool { |
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| 17 | NSObject* obj = [NSObject new]; |
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| 18 | NSObject* num1 = [NSNumber numberWithInt:7]; |
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| 19 | NSObject* num2 = [NSNumber numberWithInt:arg]; |
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| 20 | |
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| 21 | assert(!isTaggedPtr(obj)); |
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| 22 | assert(isTaggedPtr(num1) && isTaggedPtr(num2)); |
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| 23 | |
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| 24 | // obj -> num1 (includes num2) |
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| 25 | @synchronized(obj) { |
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| 26 | @synchronized(num1) { |
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| 27 | } |
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| 28 | } |
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| 29 | |
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| 30 | // num2 -> obj1 |
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| 31 | @synchronized(num2) { |
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| 32 | @synchronized(obj) { |
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| 33 | // SEVEN: ThreadSanitizer: lock-order-inversion (potential deadlock) |
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| 34 | } |
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| 35 | } |
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| 36 | } |
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| 37 | |
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| 38 | NSLog(@"PASS" ); |
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| 39 | // SIX-NOT: ThreadSanitizer |
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| 40 | // SIX: PASS |
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| 41 | return 0; |
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| 42 | } |
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| 43 | |
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