--- old/src/share/vm/prims/unsafe.cpp	2020-01-16 16:56:32.723393899 +0300
+++ new/src/share/vm/prims/unsafe.cpp	2020-01-16 16:56:32.679395318 +0300
@@ -28,7 +28,9 @@
 #if INCLUDE_ALL_GCS
 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
 #endif // INCLUDE_ALL_GCS
+#if INCLUDE_JFR
 #include "jfr/jfrEvents.hpp"
+#endif
 #include "memory/allocation.inline.hpp"
 #include "prims/jni.h"
 #include "prims/jvm.h"
@@ -1236,6 +1238,7 @@
 #endif
 UNSAFE_END
 
+#if INCLUDE_JFR
 static void post_thread_park_event(EventThreadPark* event, const oop obj, jlong timeout_nanos, jlong until_epoch_millis) {
   assert(event != NULL, "invariant");
   assert(event->should_commit(), "invariant");
@@ -1245,10 +1248,13 @@
   event->set_address((obj != NULL) ? (u8)cast_from_oop<uintptr_t>(obj) : 0);
   event->commit();
 }
+#endif
 
 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time))
   UnsafeWrapper("Unsafe_Park");
+#if INCLUDE_JFR
   EventThreadPark event;
+#endif
 #ifndef USDT2
   HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time);
 #else /* USDT2 */
@@ -1263,6 +1269,7 @@
   HOTSPOT_THREAD_PARK_END(
                           (uintptr_t) thread->parker());
 #endif /* USDT2 */
+#if INCLUDE_JFR
   if (event.should_commit()) {
     const oop obj = thread->current_park_blocker();
     if (time == 0) {
@@ -1275,6 +1282,7 @@
       }
     }
   }
+#endif
 UNSAFE_END
 
 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread))