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diff src/share/vm/memory/genRemSet.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents d2a62e0f25eb
children 330dfb0476f4
line wrap: on
line diff
--- a/src/share/vm/memory/genRemSet.hpp	Fri Aug 31 16:39:35 2012 -0700
+++ b/src/share/vm/memory/genRemSet.hpp	Sat Sep 01 13:25:18 2012 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,10 +35,22 @@
 class OopsInGenClosure;
 class CardTableRS;
 
+// Helper to remember modified oops in all klasses.
+class KlassRemSet {
+  bool _accumulate_modified_oops;
+ public:
+  KlassRemSet() : _accumulate_modified_oops(false) {}
+  void set_accumulate_modified_oops(bool value) { _accumulate_modified_oops = value; }
+  bool accumulate_modified_oops() { return _accumulate_modified_oops; }
+  bool mod_union_is_clear();
+  void clear_mod_union();
+};
+
 class GenRemSet: public CHeapObj<mtGC> {
   friend class Generation;
 
   BarrierSet* _bs;
+  KlassRemSet _klass_rem_set;
 
 public:
   enum Name {
@@ -62,6 +74,8 @@
   // Set the barrier set.
   void set_bs(BarrierSet* bs) { _bs = bs; }
 
+  KlassRemSet* klass_rem_set() { return &_klass_rem_set; }
+
   // Do any (sequential) processing necessary to prepare for (possibly
   // "parallel", if that arg is true) calls to younger_refs_iterate.
   virtual void prepare_for_younger_refs_iterate(bool parallel) = 0;
@@ -121,7 +135,7 @@
   // younger than gen from generations gen and older.
   // The parameter clear_perm indicates if the perm_gen's
   // remembered set should also be processed/cleared.
-  virtual void clear_into_younger(Generation* gen, bool clear_perm) = 0;
+  virtual void clear_into_younger(Generation* gen) = 0;
 
   // Informs the RS that refs in the given "mr" may have changed
   // arbitrarily, and therefore may contain old-to-young pointers.
@@ -136,7 +150,7 @@
   // younger indicates if the same should be done for younger generations
   // as well. The parameter perm indicates if the same should be done for
   // perm gen as well.
-  virtual void invalidate_or_clear(Generation* gen, bool younger, bool perm) = 0;
+  virtual void invalidate_or_clear(Generation* gen, bool younger) = 0;
 };
 
 #endif // SHARE_VM_MEMORY_GENREMSET_HPP