From 7de56165470646eb95a1706eec774471908f6846 Mon Sep 17 00:00:00 2001
From: zgu <unknown>
Date: Wed, 11 Jul 2018 13:55:38 -0400
Subject: [PATCH] 8207056: Epsilon GC to support object pinning Summary:
 Epsilon GC to use object pinning to avoid expensive GCLocker Reviewed-by:
 shade, rkennke

---
 src/hotspot/share/gc/epsilon/epsilonHeap.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hotspot/share/gc/epsilon/epsilonHeap.hpp b/src/hotspot/share/gc/epsilon/epsilonHeap.hpp
index f58fe522c9..628860e916 100644
--- a/src/hotspot/share/gc/epsilon/epsilonHeap.hpp
+++ b/src/hotspot/share/gc/epsilon/epsilonHeap.hpp
@@ -121,6 +121,11 @@ public:
     safe_object_iterate(cl);
   }
 
+  // Object pinning support: every object is implicitly pinned
+  virtual bool supports_object_pinning() const           { return true; }
+  virtual oop pin_object(JavaThread* thread, oop obj)    { return obj; }
+  virtual void unpin_object(JavaThread* thread, oop obj) { }
+
   // No support for block parsing.
   virtual HeapWord* block_start(const void* addr) const { return NULL;  }
   virtual size_t block_size(const HeapWord* addr) const { return 0;     }
-- 
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