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diff src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp @ 342:37f87013dfd8

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6711316: Open source the Garbage-First garbage collector Summary: First mercurial integration of the code for the Garbage-First garbage collector. Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author ysr
date Thu, 05 Jun 2008 15:57:56 -0700
parents fcbfc50865ab
children 1ee8caae33af
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Wed Jun 04 13:51:09 2008 -0700
+++ b/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Thu Jun 05 15:57:56 2008 -0700
@@ -184,6 +184,20 @@
   size_t tlab_capacity(Thread* thr) const;
   size_t unsafe_max_tlab_alloc(Thread* thr) const;
 
+  // Can a compiler initialize a new object without store barriers?
+  // This permission only extends from the creation of a new object
+  // via a TLAB up to the first subsequent safepoint.
+  virtual bool can_elide_tlab_store_barriers() const {
+    return true;
+  }
+
+  // Can a compiler elide a store barrier when it writes
+  // a permanent oop into the heap?  Applies when the compiler
+  // is storing x to the heap, where x->is_perm() is true.
+  virtual bool can_elide_permanent_oop_store_barriers() const {
+    return true;
+  }
+
   void oop_iterate(OopClosure* cl);
   void object_iterate(ObjectClosure* cl);
   void permanent_oop_iterate(OopClosure* cl);