15d71de26cedae3dafc17449fe0182045c0bd20e8Stephen Hines// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 27be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <pthread.h> 37be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <stdio.h> 47be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <unistd.h> 57be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <sys/types.h> 67be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <sys/stat.h> 77be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany#include <fcntl.h> 82d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <unistd.h> 92d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <errno.h> 107be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany 117be1cc87ba99036519437518ec8eb9231916241bKostya Serebryanyint fd; 127be1cc87ba99036519437518ec8eb9231916241bKostya Serebryanychar buf; 137be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany 147be1cc87ba99036519437518ec8eb9231916241bKostya Serebryanyvoid *Thread(void *x) { 152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines sleep(1); 167be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany read(fd, &buf, 1); 177be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany return NULL; 187be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany} 197be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany 207be1cc87ba99036519437518ec8eb9231916241bKostya Serebryanyint main() { 217be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany fd = open("/dev/random", O_RDONLY); 222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (fd < 0) { 232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines fprintf(stderr, "failed to open /dev/random (%d)\n", errno); 242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return 1; 252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 267be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany pthread_t t[2]; 277be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany pthread_create(&t[0], NULL, Thread, NULL); 287be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany pthread_create(&t[1], NULL, Thread, NULL); 297be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany pthread_join(t[0], NULL); 307be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany pthread_join(t[1], NULL); 317be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany close(fd); 322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines fprintf(stderr, "DONE\n"); 337be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany} 347be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany 357be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany// CHECK: WARNING: ThreadSanitizer: data race 367be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany// CHECK: Write of size 1 377be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany// CHECK: #0 read 387be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany// CHECK: Previous write of size 1 397be1cc87ba99036519437518ec8eb9231916241bKostya Serebryany// CHECK: #0 read 402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// CHECK: DONE 412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 42