1// Check that ignore_interceptors_accesses=1 supresses reporting races from 2// system libraries on OS X. There are currently false positives coming from 3// libxpc, libdispatch, CoreFoundation and others, because these libraries use 4// TSan-invisible atomics as synchronization. 5 6// RUN: %clang_tsan %s -o %t -framework Foundation 7 8// Check that without the flag, there are false positives. 9// RUN: %deflake %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-RACE 10 11// With ignore_interceptors_accesses=1, no races are reported. 12// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s 13 14// With ignore_interceptors_accesses=1, races in user's code are still reported. 15// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %deflake %run %t race 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-RACE 16 17#import <Foundation/Foundation.h> 18 19#import "../test.h" 20 21long global; 22 23void *Thread1(void *x) { 24 barrier_wait(&barrier); 25 global = 42; 26 return NULL; 27} 28 29void *Thread2(void *x) { 30 global = 43; 31 barrier_wait(&barrier); 32 return NULL; 33} 34 35int main(int argc, char *argv[]) { 36 fprintf(stderr, "Hello world.\n"); 37 38 // NSUserDefaults uses XPC which triggers the false positive. 39 NSDictionary *d = [[NSUserDefaults standardUserDefaults] dictionaryRepresentation]; 40 41 if (argc > 1 && strcmp(argv[1], "race") == 0) { 42 barrier_init(&barrier, 2); 43 pthread_t t[2]; 44 pthread_create(&t[0], NULL, Thread1, NULL); 45 pthread_create(&t[1], NULL, Thread2, NULL); 46 pthread_join(t[0], NULL); 47 pthread_join(t[1], NULL); 48 } 49 50 fprintf(stderr, "Done.\n"); 51} 52 53// CHECK: Hello world. 54// CHECK-RACE: SUMMARY: ThreadSanitizer: data race 55// CHECK: Done. 56