--- a/hotspot/src/share/vm/classfile/classLoader.cpp Thu Jan 13 22:54:23 2011 -0800
+++ b/hotspot/src/share/vm/classfile/classLoader.cpp Thu Oct 07 13:49:40 2010 -0700
@@ -1382,3 +1382,61 @@
}
#endif //PRODUCT
+
+// Please keep following two functions at end of this file. With them placed at top or in middle of the file,
+// they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
+void PerfClassTraceTime::initialize() {
+ if (!UsePerfData) return;
+
+ if (_eventp != NULL) {
+ // increment the event counter
+ _eventp->inc();
+ }
+
+ // stop the current active thread-local timer to measure inclusive time
+ _prev_active_event = -1;
+ for (int i=0; i < EVENT_TYPE_COUNT; i++) {
+ if (_timers[i].is_active()) {
+ assert(_prev_active_event == -1, "should have only one active timer");
+ _prev_active_event = i;
+ _timers[i].stop();
+ }
+ }
+
+ if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
+ // start the inclusive timer if not recursively called
+ _t.start();
+ }
+
+ // start thread-local timer of the given event type
+ if (!_timers[_event_type].is_active()) {
+ _timers[_event_type].start();
+ }
+}
+
+PerfClassTraceTime::~PerfClassTraceTime() {
+ if (!UsePerfData) return;
+
+ // stop the thread-local timer as the event completes
+ // and resume the thread-local timer of the event next on the stack
+ _timers[_event_type].stop();
+ jlong selftime = _timers[_event_type].ticks();
+
+ if (_prev_active_event >= 0) {
+ _timers[_prev_active_event].start();
+ }
+
+ if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
+
+ // increment the counters only on the leaf call
+ _t.stop();
+ _timep->inc(_t.ticks());
+ if (_selftimep != NULL) {
+ _selftimep->inc(selftime);
+ }
+ // add all class loading related event selftime to the accumulated time counter
+ ClassLoader::perf_accumulated_time()->inc(selftime);
+
+ // reset the timer
+ _timers[_event_type].reset();
+}