8238083: Crash: assert(is_object_aligned(v)) failed: address not alig…

…ned: 0xfffffffffffffff1

Reviewed-by: mgronlun

src/jdk.jfr/share/classes/jdk/jfr/internal/Utils.java

@@ -328,17 +328,23 @@ static long nanosToTicks(long nanos) {
 
     static synchronized EventHandler getHandler(Class<? extends jdk.internal.event.Event> eventClass) {
         Utils.ensureValidEventSubclass(eventClass);
-        Object handler = JVM.getJVM().getHandler(eventClass);
-        if (handler == null || handler instanceof EventHandler) {
-            return (EventHandler) handler;
+        try {
+            Field f = eventClass.getDeclaredField(EventInstrumentation.FIELD_EVENT_HANDLER);
+            SecuritySupport.setAccessible(f);
+            return (EventHandler) f.get(null);
+        } catch (NoSuchFieldException | IllegalArgumentException | IllegalAccessException e) {
+            throw new InternalError("Could not access event handler");
         }
-        throw new InternalError("Could not access event handler");
     }
 
     static synchronized void setHandler(Class<? extends jdk.internal.event.Event> eventClass, EventHandler handler) {
         Utils.ensureValidEventSubclass(eventClass);
-        if (!JVM.getJVM().setHandler(eventClass, handler)) {
-            throw new InternalError("Could not set event handler");
+        try {
+            Field field = eventClass.getDeclaredField(EventInstrumentation.FIELD_EVENT_HANDLER);
+            SecuritySupport.setAccessible(field);
+            field.set(null, handler);
+        } catch (NoSuchFieldException | IllegalArgumentException | IllegalAccessException e) {
+            throw new InternalError("Could not access event handler");
         }
     }