--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Fri Jun 12 12:55:32 2015 +0200
@@ -3233,6 +3233,28 @@
 }
 #endif // PRODUCT
 
+G1HeapSummary G1CollectedHeap::create_g1_heap_summary() {
+  YoungList* young_list = heap()->young_list();
+
+  size_t eden_used_bytes = young_list->eden_used_bytes();
+  size_t survivor_used_bytes = young_list->survivor_used_bytes();
+
+  size_t eden_capacity_bytes =
+    (g1_policy()->young_list_target_length() * HeapRegion::GrainBytes) - survivor_used_bytes;
+
+  VirtualSpaceSummary heap_summary = create_heap_space_summary();
+  return G1HeapSummary(heap_summary, used(), eden_used_bytes, eden_capacity_bytes, survivor_used_bytes);
+}
+
+void G1CollectedHeap::trace_heap(GCWhen::Type when, const GCTracer* gc_tracer) {
+  const G1HeapSummary& heap_summary = create_g1_heap_summary();
+  gc_tracer->report_gc_heap_summary(when, heap_summary);
+
+  const MetaspaceSummary& metaspace_summary = create_metaspace_summary();
+  gc_tracer->report_metaspace_summary(when, metaspace_summary);
+}
+
+
 G1CollectedHeap* G1CollectedHeap::heap() {
   CollectedHeap* heap = Universe::heap();
   assert(heap != NULL, "Uninitialized access to G1CollectedHeap::heap()");

--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Fri Jun 12 12:55:32 2015 +0200
@@ -370,6 +370,8 @@
   void log_gc_header();
   void log_gc_footer(double pause_time_sec);
 
+  void trace_heap(GCWhen::Type when, const GCTracer* tracer);
+
   // These are macros so that, if the assert fires, we get the correct
   // line number, file, etc.
 
@@ -1548,6 +1550,8 @@
   bool is_obj_dead_cond(const oop obj,
                         const VerifyOption vo) const;
 
+  G1HeapSummary create_g1_heap_summary();
+
   // Printing
 
   virtual void print_on(outputStream* st) const;

--- a/hotspot/src/share/vm/gc/shared/gcHeapSummary.hpp	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/gc/shared/gcHeapSummary.hpp	Fri Jun 12 12:55:32 2015 +0200
@@ -78,11 +78,13 @@
 
 class GCHeapSummary;
 class PSHeapSummary;
+class G1HeapSummary;
 
 class GCHeapSummaryVisitor {
  public:
   virtual void visit(const GCHeapSummary* heap_summary) const = 0;
   virtual void visit(const PSHeapSummary* heap_summary) const {}
+  virtual void visit(const G1HeapSummary* heap_summary) const {}
 };
 
 class GCHeapSummary : public StackObj {
@@ -125,6 +127,22 @@
    }
 };
 
+class G1HeapSummary : public GCHeapSummary {
+  size_t  _edenUsed;
+  size_t  _edenCapacity;
+  size_t  _survivorUsed;
+ public:
+   G1HeapSummary(VirtualSpaceSummary& heap_space, size_t heap_used, size_t edenUsed, size_t edenCapacity, size_t survivorUsed) :
+       GCHeapSummary(heap_space, heap_used), _edenUsed(edenUsed), _edenCapacity(edenCapacity), _survivorUsed(survivorUsed) { }
+   const size_t edenUsed() const { return _edenUsed; }
+   const size_t edenCapacity() const { return _edenCapacity; }
+   const size_t survivorUsed() const { return _survivorUsed; }
+
+   virtual void accept(GCHeapSummaryVisitor* visitor) const {
+     visitor->visit(this);
+   }
+};
+
 class MetaspaceSummary : public StackObj {
   size_t _capacity_until_GC;
   MetaspaceSizes _meta_space;

--- a/hotspot/src/share/vm/gc/shared/gcTrace.hpp	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/gc/shared/gcTrace.hpp	Fri Jun 12 12:55:32 2015 +0200
@@ -44,6 +44,7 @@
 class MetaspaceChunkFreeListSummary;
 class MetaspaceSummary;
 class PSHeapSummary;
+class G1HeapSummary;
 class ReferenceProcessorStats;
 class TimePartitions;
 class BoolObjectClosure;

--- a/hotspot/src/share/vm/gc/shared/gcTraceSend.cpp	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/gc/shared/gcTraceSend.cpp	Fri Jun 12 12:55:32 2015 +0200
@@ -263,6 +263,20 @@
     }
   }
 
+  void visit(const G1HeapSummary* g1_heap_summary) const {
+    visit((GCHeapSummary*)g1_heap_summary);
+
+    EventG1HeapSummary e;
+    if (e.should_commit()) {
+      e.set_gcId(_gc_id.id());
+      e.set_when((u1)_when);
+      e.set_edenUsedSize(g1_heap_summary->edenUsed());
+      e.set_edenTotalSize(g1_heap_summary->edenCapacity());
+      e.set_survivorUsedSize(g1_heap_summary->survivorUsed());
+      e.commit();
+    }
+  }
+
   void visit(const PSHeapSummary* ps_heap_summary) const {
     visit((GCHeapSummary*)ps_heap_summary);
 

--- a/hotspot/src/share/vm/trace/trace.xml	Thu Jun 11 11:07:03 2015 -0400
+++ b/hotspot/src/share/vm/trace/trace.xml	Fri Jun 12 12:55:32 2015 +0200
@@ -264,6 +264,15 @@
       <structvalue type="ObjectSpace" field="toSpace" label="To Space"/>
     </event>
 
+    <event id="G1HeapSummary" path="vm/gc/heap/g1_summary" label="G1 Heap Summary" is_instant="true">
+      <value type="UINT" field="gcId" label="GC ID" relation="GC_ID"/>
+      <value type="GCWHEN" field="when" label="When" />
+
+      <value type="BYTES64" field="edenUsedSize" label="Eden Used Size" />
+      <value type="BYTES64" field="edenTotalSize" label="Eden Total Size" />
+      <value type="BYTES64" field="survivorUsedSize" label="Survivor Used Size" />
+    </event>
+
     <event id="GCGarbageCollection" path="vm/gc/collector/garbage_collection" label="Garbage Collection"
            description="Garbage collection performed by the JVM">
       <value type="UINT" field="gcId"  label="GC ID" relation="GC_ID" />