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 #include <errno.h> 7 8 int fd; 9 char buf; 10 11 void *Thread1(void *x) { 12 barrier_wait(&barrier); 13 read(fd, &buf, 1); 14 return NULL; 15 } 16 17 void *Thread2(void *x) { 18 read(fd, &buf, 1); 19 barrier_wait(&barrier); 20 return NULL; 21 } 22 23 int main() { 24 barrier_init(&barrier, 2); 25 fd = open("/dev/random", O_RDONLY); 26 if (fd < 0) { 27 fprintf(stderr, "failed to open /dev/random (%d)\n", errno); 28 return 1; 29 } 30 pthread_t t[2]; 31 pthread_create(&t[0], NULL, Thread1, NULL); 32 pthread_create(&t[1], NULL, Thread2, NULL); 33 pthread_join(t[0], NULL); 34 pthread_join(t[1], NULL); 35 close(fd); 36 fprintf(stderr, "DONE\n"); 37 } 38 39 // CHECK: WARNING: ThreadSanitizer: data race 40 // CHECK: Write of size 1 41 // CHECK: #0 read 42 // CHECK: Previous write of size 1 43 // CHECK: #0 read 44 // CHECK: DONE 45 46
