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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
// Race between an aligned access and an unaligned access, which
// touches the same memory region.
// This is a real race which is not detected by tsan.
// https://code.google.com/p/thread-sanitizer/issues/detail?id=17
#include <pthread.h>
#include <stdio.h>
#include <stdint.h>
uint64_t Global[2];
void *Thread1(void *x) {
Global[1]++;
return NULL;
}
void *Thread2(void *x) {
char *p1 = reinterpret_cast<char *>(&Global[0]);
uint64_t *p4 = reinterpret_cast<uint64_t *>(p1 + 1);
(*p4)++;
return NULL;
}
int main() {
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
printf("Pass\n");
// CHECK-NOT: ThreadSanitizer: data race
// CHECK: Pass
return 0;
}
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