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1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s2// Race between an aligned access and an unaligned access, which3// touches the same memory region.4#include "test.h"5#include <stdint.h>6 7uint64_t Global[2];8 9void *Thread1(void *x) {10  Global[1]++;11  barrier_wait(&barrier);12  return NULL;13}14 15void *Thread2(void *x) {16  barrier_wait(&barrier);17  char *p1 = reinterpret_cast<char *>(&Global[0]);18  struct __attribute__((packed, aligned(1))) u_uint64_t { uint64_t val; };19  u_uint64_t *p4 = reinterpret_cast<u_uint64_t *>(p1 + 1);20  (*p4).val++;21  return NULL;22}23 24int main() {25  barrier_init(&barrier, 2);26  pthread_t t[2];27  pthread_create(&t[0], NULL, Thread1, NULL);28  pthread_create(&t[1], NULL, Thread2, NULL);29  pthread_join(t[0], NULL);30  pthread_join(t[1], NULL);31  fprintf(stderr, "Pass\n");32  // CHECK: ThreadSanitizer: data race33  // CHECK: Pass34  return 0;35}36