1*7c3d14c8STreehugger Robot// RUN: %clang_tsan %s -o %t -framework Foundation 2*7c3d14c8STreehugger Robot// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s 3*7c3d14c8STreehugger Robot 4*7c3d14c8STreehugger Robot#import <Foundation/Foundation.h> 5*7c3d14c8STreehugger Robot 6*7c3d14c8STreehugger Robot#import "../test.h" 7*7c3d14c8STreehugger Robot 8*7c3d14c8STreehugger Robotstatic const long kNumThreads = 4; 9*7c3d14c8STreehugger Robot 10*7c3d14c8STreehugger Robotlong global; 11*7c3d14c8STreehugger Robotlong global2; 12*7c3d14c8STreehugger Robot 13*7c3d14c8STreehugger Robotstatic dispatch_once_t once_token; 14*7c3d14c8STreehugger Robotstatic dispatch_once_t once_token2; 15*7c3d14c8STreehugger Robot 16*7c3d14c8STreehugger Robotvoid f(void *) { 17*7c3d14c8STreehugger Robot global2 = 42; 18*7c3d14c8STreehugger Robot usleep(100000); 19*7c3d14c8STreehugger Robot} 20*7c3d14c8STreehugger Robot 21*7c3d14c8STreehugger Robotvoid *Thread(void *a) { 22*7c3d14c8STreehugger Robot barrier_wait(&barrier); 23*7c3d14c8STreehugger Robot 24*7c3d14c8STreehugger Robot dispatch_once(&once_token, ^{ 25*7c3d14c8STreehugger Robot global = 42; 26*7c3d14c8STreehugger Robot usleep(100000); 27*7c3d14c8STreehugger Robot }); 28*7c3d14c8STreehugger Robot long x = global; 29*7c3d14c8STreehugger Robot 30*7c3d14c8STreehugger Robot dispatch_once_f(&once_token2, NULL, f); 31*7c3d14c8STreehugger Robot long x2 = global2; 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot fprintf(stderr, "global = %ld\n", x); 34*7c3d14c8STreehugger Robot fprintf(stderr, "global2 = %ld\n", x2); 35*7c3d14c8STreehugger Robot return 0; 36*7c3d14c8STreehugger Robot} 37*7c3d14c8STreehugger Robot 38*7c3d14c8STreehugger Robotint main() { 39*7c3d14c8STreehugger Robot fprintf(stderr, "Hello world.\n"); 40*7c3d14c8STreehugger Robot barrier_init(&barrier, kNumThreads); 41*7c3d14c8STreehugger Robot 42*7c3d14c8STreehugger Robot pthread_t t[kNumThreads]; 43*7c3d14c8STreehugger Robot for (int i = 0; i < kNumThreads; i++) { 44*7c3d14c8STreehugger Robot pthread_create(&t[i], 0, Thread, 0); 45*7c3d14c8STreehugger Robot } 46*7c3d14c8STreehugger Robot for (int i = 0; i < kNumThreads; i++) { 47*7c3d14c8STreehugger Robot pthread_join(t[i], 0); 48*7c3d14c8STreehugger Robot } 49*7c3d14c8STreehugger Robot 50*7c3d14c8STreehugger Robot fprintf(stderr, "Done.\n"); 51*7c3d14c8STreehugger Robot} 52*7c3d14c8STreehugger Robot 53*7c3d14c8STreehugger Robot// CHECK: Hello world. 54*7c3d14c8STreehugger Robot// CHECK: Done. 55*7c3d14c8STreehugger Robot// CHECK-NOT: WARNING: ThreadSanitizer 56