FreeBSD TSan support update

[devnexen]

Summary

• Disable thread_finalize callback on FreeBSD, fixing couple of unit tests.

Patch by David CARLIER

[vitalybuka]

Can you explain in description why?

[devnexen]

ping

compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc

if (sctx) {
     thr->signal_ctx = 0;
     UnmapOrDie(sctx, sizeof(*sctx));
   }
   DTLS_Destroy();
   cur_thread_finalize();
 }
 }  // namespace __tsan
 
-#if !SANITIZER_MAC && !SANITIZER_NETBSD
+#if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
 static void thread_finalize(void *v) {
   uptr iter = (uptr)v;
   if (iter > 1) {
     if (pthread_setspecific(interceptor_ctx()->finalize_key,
         (void*)(iter - 1))) {
       Printf("ThreadSanitizer: failed to set thread key\n");
       Die();
     }
extern "C" void *__tsan_thread_start_func(void *arg) {
   ThreadParam *p = (ThreadParam*)arg;
   void* (*callback)(void *arg) = p->callback;
   void *param = p->param;
   int tid = 0;
   {
     ThreadState *thr = cur_thread();
     // Thread-local state is not initialized yet.
     ScopedIgnoreInterceptors ignore;
-#if !SANITIZER_MAC && !SANITIZER_NETBSD
+#if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
     ThreadIgnoreBegin(thr, 0);
     if (pthread_setspecific(interceptor_ctx()->finalize_key,
                             (void *)GetPthreadDestructorIterations())) {
       Printf("ThreadSanitizer: failed to set thread key\n");
       Die();
     }
     ThreadIgnoreEnd(thr, 0);
 #endif
#if !SANITIZER_MAC && !SANITIZER_ANDROID
   REAL(atexit) = (int(*)(void(*)()))unreachable;
 #endif
 
   if (REAL(__cxa_atexit)(&finalize, 0, 0)) {
     Printf("ThreadSanitizer: failed to setup atexit callback\n");
     Die();
   }
 
-#if !SANITIZER_MAC && !SANITIZER_NETBSD
+#if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
   if (pthread_key_create(&interceptor_ctx()->finalize_key, &thread_finalize)) {
     Printf("ThreadSanitizer: failed to create thread key\n");
     Die();
   }
 #endif
 
   TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_init);
   TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_signal);