compiler-rt/test/tsan/Linux/sethostent.cpp

   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
  13 extern "C" void __sanitizer_malloc_hook(void *ptr, size_t size) {
  14   __atomic_fetch_add(&X, 1, __ATOMIC_RELAXED);
  15 }
  16
  17 extern "C" void __sanitizer_free_hook(void *ptr) {
  18   __atomic_fetch_sub(&X, 1, __ATOMIC_RELAXED);
  19 }
  20
  21 void *Thread(void *x) {
  22   sethostent(1);
  23   gethostbyname("llvm.org");
  24   gethostent();
  25   endhostent();
  26   return NULL;
  27 }
  28
  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