src/share/vm/gc_interface/collectedHeap.hpp

rev 4973 : imported patch checkpointing.diff

@@ -472,10 +472,12 @@
   // vm thread. It collects the heap assuming that the
   // heap lock is already held and that we are executing in
   // the context of the vm thread.
   virtual void collect_as_vm_thread(GCCause::Cause cause);
 
+  virtual void inform_non_gc_safepoint() {}
+
   // Callback from VM_CollectForMetadataAllocation operation.
   MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data,
                                                size_t size,
                                                Metaspace::MetadataType mdtype);
 

@@ -661,6 +663,23 @@
           "This method manipulates heap state without locking");
     _heap->set_gc_cause(_previous_cause);
   }
 };
 
+class NonGCSafepointMark : StackObj {
+  CollectedHeap* _heap;
+  unsigned int _total_collections;
+  unsigned int _total_full_collections;
+public:
+  NonGCSafepointMark(CollectedHeap* heap) : _heap(heap),
+      _total_collections(heap->total_collections()),
+      _total_full_collections(heap->total_full_collections()) { }
+
+  ~NonGCSafepointMark() {
+    if (_heap->total_collections() == _total_collections &&
+        _heap->total_full_collections() == _total_full_collections) {
+      _heap->inform_non_gc_safepoint();
+    }
+  }
+};
+
 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP