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1// RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++112// RUN: %run %t 2>&1 | FileCheck %s3 4#import <Foundation/Foundation.h>5#import <libkern/OSAtomic.h>6 7#include <thread>8 9volatile int64_t retainCount = 0;10 11long g = 0;12 13void dealloc() {14 g = 42;15}16 17void release() {18 if (OSAtomicAdd64Barrier(-1, &retainCount) == 0) {19 dealloc();20 }21}22 23void retain() {24 OSAtomicAdd64Barrier(1, &retainCount);25}26 27int main(int argc, const char * argv[]) {28 fprintf(stderr, "start\n");29 retain();30 retain();31 32 std::thread t([]{33 release();34 });35 36 g = 47;37 38 release();39 t.join();40 41 fprintf(stderr, "end, g = %ld\n", g);42 43 return 0;44}45 46// CHECK: start47// CHECK: end, g = 4248// CHECK-NOT: WARNING: ThreadSanitizer49