1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include "test.h" 3 #include <sys/types.h> 4 #include <sys/stat.h> 5 #include <fcntl.h> 6 7 int X; 8 9 void *Thread1(void *x) { 10 barrier_wait(&barrier); 11 int f = open("/dev/random", O_RDONLY); 12 char buf; 13 read(f, &buf, 1); 14 close(f); 15 X = 42; 16 return NULL; 17 } 18 19 void *Thread2(void *x) { 20 X = 43; 21 write(STDOUT_FILENO, "a", 1); 22 barrier_wait(&barrier); 23 return NULL; 24 } 25 26 int main() { 27 barrier_init(&barrier, 2); 28 pthread_t t[2]; 29 pthread_create(&t[0], NULL, Thread1, NULL); 30 pthread_create(&t[1], NULL, Thread2, NULL); 31 pthread_join(t[0], NULL); 32 pthread_join(t[1], NULL); 33 } 34 35 // CHECK: WARNING: ThreadSanitizer: data race 36 // CHECK: Write of size 4 37 // CHECK: #0 Thread1 38 // CHECK: Previous write of size 4 39 // CHECK: #0 Thread2 40 41 42
