1 // RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 #include <sys/types.h> 6 #include <sys/stat.h> 7 #include <fcntl.h> 8 9 int fd; 10 char buf; 11 12 void *Thread(void *x) { 13 read(fd, &buf, 1); 14 return NULL; 15 } 16 17 int main() { 18 fd = open("/dev/random", O_RDONLY); 19 if (fd < 0) return 1; 20 pthread_t t[2]; 21 pthread_create(&t[0], NULL, Thread, NULL); 22 pthread_create(&t[1], NULL, Thread, NULL); 23 pthread_join(t[0], NULL); 24 pthread_join(t[1], NULL); 25 close(fd); 26 } 27 28 // CHECK: WARNING: ThreadSanitizer: data race 29 // CHECK: Write of size 1 30 // CHECK: #0 read 31 // CHECK: Previous write of size 1 32 // CHECK: #0 read 33
