src/share/vm/jfr/support/jfrFlush.hpp

rev 9055 : 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg

@@ -46,14 +46,16 @@
 bool jfr_save_stacktrace(Thread* t);
 void jfr_clear_stacktrace(Thread* t);
 
 template <typename Event>
 class JfrConditionalFlush {
+ protected:
+  bool _enabled;
  public:
   typedef JfrBuffer Type;
-  JfrConditionalFlush(Thread* t) {
-    if (jfr_is_event_enabled(Event::eventId)) {
+  JfrConditionalFlush(Thread* t) : _enabled(jfr_is_event_enabled(Event::eventId)) {
+    if (_enabled) {
       jfr_conditional_flush(Event::eventId, sizeof(Event), t);
     }
   }
 };
 

@@ -61,11 +63,11 @@
 class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
   Thread* _t;
   bool _owner;
  public:
   JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
-    if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
+    if (this->_enabled && Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
       _owner = jfr_save_stacktrace(t);
     }
   }
   ~JfrConditionalFlushWithStacktrace() {
     if (_owner) {