1*7c3d14c8STreehugger Robot // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s 2*7c3d14c8STreehugger Robot #include "test.h" 3*7c3d14c8STreehugger Robot 4*7c3d14c8STreehugger Robot // Test for https://llvm.org/bugs/show_bug.cgi?id=23235 5*7c3d14c8STreehugger Robot // The bug was that synchronization between thread creation and thread start 6*7c3d14c8STreehugger Robot // is not established if pthread_create is followed by pthread_detach. 7*7c3d14c8STreehugger Robot 8*7c3d14c8STreehugger Robot int x; 9*7c3d14c8STreehugger Robot Thread(void * a)10*7c3d14c8STreehugger Robotvoid *Thread(void *a) { 11*7c3d14c8STreehugger Robot x = 42; 12*7c3d14c8STreehugger Robot barrier_wait(&barrier); 13*7c3d14c8STreehugger Robot return 0; 14*7c3d14c8STreehugger Robot } 15*7c3d14c8STreehugger Robot main()16*7c3d14c8STreehugger Robotint main() { 17*7c3d14c8STreehugger Robot barrier_init(&barrier, 2); 18*7c3d14c8STreehugger Robot pthread_t t; 19*7c3d14c8STreehugger Robot x = 43; 20*7c3d14c8STreehugger Robot pthread_create(&t, 0, Thread, 0); 21*7c3d14c8STreehugger Robot pthread_detach(t); 22*7c3d14c8STreehugger Robot barrier_wait(&barrier); 23*7c3d14c8STreehugger Robot fprintf(stderr, "PASS\n"); 24*7c3d14c8STreehugger Robot return 0; 25*7c3d14c8STreehugger Robot } 26*7c3d14c8STreehugger Robot 27*7c3d14c8STreehugger Robot // CHECK-NOT: WARNING: ThreadSanitizer: data race 28*7c3d14c8STreehugger Robot // CHECK: PASS 29