1 /*
   2  * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *

 158   // of the old generation.
 159   HeapWord* failed_mem_allocate(size_t size);
 160 
 161   // Support for System.gc()
 162   void collect(GCCause::Cause cause);
 163 
 164   // These also should be called by the vm thread at a safepoint (e.g., from a
 165   // VM operation).
 166   //
 167   // The first collects the young generation only, unless the scavenge fails; it
 168   // will then attempt a full gc.  The second collects the entire heap; if
 169   // maximum_compaction is true, it will compact everything and clear all soft
 170   // references.
 171   inline void invoke_scavenge();
 172 
 173   // Perform a full collection
 174   virtual void do_full_collection(bool clear_all_soft_refs);
 175 
 176   bool supports_inline_contig_alloc() const { return !UseNUMA; }
 177 
 178   HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; }
 179   HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; }
 180 
 181   void ensure_parsability(bool retire_tlabs);
 182   void accumulate_statistics_all_tlabs();
 183   void resize_all_tlabs();
 184 
 185   bool supports_tlab_allocation() const { return true; }
 186 
 187   size_t tlab_capacity(Thread* thr) const;
 188   size_t tlab_used(Thread* thr) const;
 189   size_t unsafe_max_tlab_alloc(Thread* thr) const;
 190 
 191   // Can a compiler initialize a new object without store barriers?
 192   // This permission only extends from the creation of a new object
 193   // via a TLAB up to the first subsequent safepoint.
 194   virtual bool can_elide_tlab_store_barriers() const {
 195     return true;
 196   }
 197 
 198   virtual bool card_mark_must_follow_store() const {

   1 /*
   2  * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *

 158   // of the old generation.
 159   HeapWord* failed_mem_allocate(size_t size);
 160 
 161   // Support for System.gc()
 162   void collect(GCCause::Cause cause);
 163 
 164   // These also should be called by the vm thread at a safepoint (e.g., from a
 165   // VM operation).
 166   //
 167   // The first collects the young generation only, unless the scavenge fails; it
 168   // will then attempt a full gc.  The second collects the entire heap; if
 169   // maximum_compaction is true, it will compact everything and clear all soft
 170   // references.
 171   inline void invoke_scavenge();
 172 
 173   // Perform a full collection
 174   virtual void do_full_collection(bool clear_all_soft_refs);
 175 
 176   bool supports_inline_contig_alloc() const { return !UseNUMA; }
 177 
 178   HeapWord* volatile* top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord* volatile*)-1; }
 179   HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; }
 180 
 181   void ensure_parsability(bool retire_tlabs);
 182   void accumulate_statistics_all_tlabs();
 183   void resize_all_tlabs();
 184 
 185   bool supports_tlab_allocation() const { return true; }
 186 
 187   size_t tlab_capacity(Thread* thr) const;
 188   size_t tlab_used(Thread* thr) const;
 189   size_t unsafe_max_tlab_alloc(Thread* thr) const;
 190 
 191   // Can a compiler initialize a new object without store barriers?
 192   // This permission only extends from the creation of a new object
 193   // via a TLAB up to the first subsequent safepoint.
 194   virtual bool can_elide_tlab_store_barriers() const {
 195     return true;
 196   }
 197 
 198   virtual bool card_mark_must_follow_store() const {