src/hotspot/share/prims/jvm.cpp

rev 54996 : Checkpoint latest preliminary review patches for full OpenJDK review; merge with 8222295.patch.
rev 55000 : [mq]: dcubed.monitor_deflate_conc.v2.04

@@ -71,10 +71,11 @@
 #include "runtime/jniHandles.inline.hpp"
 #include "runtime/orderAccess.hpp"
 #include "runtime/os.inline.hpp"
 #include "runtime/perfData.hpp"
 #include "runtime/reflection.hpp"
+#include "runtime/synchronizer.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/threadSMR.hpp"
 #include "runtime/vframe.inline.hpp"
 #include "runtime/vmOperations.hpp"
 #include "runtime/vm_version.hpp"

@@ -482,10 +483,15 @@
 
 
 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
   JVMWrapper("JVM_GC");
   if (!DisableExplicitGC) {
+    if (AsyncDeflateIdleMonitors) {
+      // AsyncDeflateIdleMonitors needs to know when System.gc() is
+      // called so any special deflation can be done at a safepoint.
+      ObjectSynchronizer::set_is_special_deflation_requested(true);
+    }
     Universe::heap()->collect(GCCause::_java_lang_system_gc);
   }
 JVM_END