1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s 2 // Race between an aligned access and an unaligned access, which 3 // touches the same memory region. 4 #include "test.h" 5 #include <stdint.h> 6 7 uint64_t Global[2]; 8 9 void *Thread1(void *x) { 10 Global[1]++; 11 barrier_wait(&barrier); 12 return NULL; 13 } 14 15 void *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 24 int 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 race 33 // CHECK: Pass 34 return 0; 35 } 36
