8055098: WB API should be extended to provide information about size and age of object.

Summary: Extend the WhiteBox API to provide information about the size and age of objects. Further add a mechanism to trigger a young GC.
Reviewed-by: tschatzl, sjohanss
Contributed-by: Leonid Mesnik <leonid.mesnik@oracle.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
index 2439b41e6..a59198994 100644
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
@@ -2531,7 +2531,7 @@ void G1CollectedHeap::collect(GCCause::Cause cause) {
         }
       }
     } else {
-      if (cause == GCCause::_gc_locker
+      if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc
           DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) {
 
         // Schedule a standard evacuation pause. We're setting word_size
diff --git a/src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp b/src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp
index aede4e5b6..3a8f347bc 100644
--- a/src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp
+++ b/src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp
@@ -70,7 +70,7 @@ void VM_ParallelGCSystemGC::doit() {
     "must be a ParallelScavengeHeap");
 
   GCCauseSetter gccs(heap, _gc_cause);
-  if (_gc_cause == GCCause::_gc_locker
+  if (_gc_cause == GCCause::_gc_locker || _gc_cause == GCCause::_wb_young_gc
       DEBUG_ONLY(|| _gc_cause == GCCause::_scavenge_alot)) {
     // If (and only if) the scavenge fails, this will invoke a full gc.
     heap->invoke_scavenge();