1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2
3 // Use of gethostent provokes caching of some resources inside of libc.
4 // They are freed in __libc_thread_freeres very late in thread lifetime,
5 // after our ThreadFinish. __libc_thread_freeres calls free which
6 // previously crashed in malloc hooks.
7
8 #include "../test.h"
9 #include <netdb.h>
10
11 long X;
12
__sanitizer_malloc_hook(void * ptr,size_t size)13 extern "C" void __sanitizer_malloc_hook(void *ptr, size_t size) {
14 __atomic_fetch_add(&X, 1, __ATOMIC_RELAXED);
15 }
16
__sanitizer_free_hook(void * ptr)17 extern "C" void __sanitizer_free_hook(void *ptr) {
18 __atomic_fetch_sub(&X, 1, __ATOMIC_RELAXED);
19 }
20
Thread(void * x)21 void *Thread(void *x) {
22 sethostent(1);
23 gethostbyname("llvm.org");
24 gethostent();
25 endhostent();
26 return NULL;
27 }
28
main()29 int main() {
30 pthread_t th;
31 pthread_create(&th, NULL, Thread, NULL);
32 pthread_join(th, NULL);
33 fprintf(stderr, "DONE\n");
34 return 0;
35 }
36
37 // CHECK: DONE
38