src/hotspot/share/gc/shared/genCollectedHeap.hpp

RFE_8195103_reduce_initial_card_marks

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2017, 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
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2018, 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
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
***************
*** 268,293 ****
    virtual size_t tlab_capacity(Thread* thr) const;
    virtual size_t tlab_used(Thread* thr) const;
    virtual size_t unsafe_max_tlab_alloc(Thread* thr) const;
    virtual HeapWord* allocate_new_tlab(size_t size);
  
-   // 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;
-   }
- 
-   // We don't need barriers for stores to objects in the
-   // young gen and, a fortiori, for initializing stores to
-   // objects therein. This applies to DefNew+Tenured and ParNew+CMS
-   // only and may need to be re-examined in case other
-   // kinds of collectors are implemented in the future.
-   virtual bool can_elide_initializing_store_barrier(oop new_obj) {
-     return is_in_young(new_obj);
-   }
- 
    // The "requestor" generation is performing some garbage collection
    // action for which it would be useful to have scratch space.  The
    // requestor promises to allocate no more than "max_alloc_words" in any
    // older generation (via promotion say.)   Any blocks of space that can
    // be provided are returned as a list of ScratchBlocks, sorted by
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