1 /*
   2  * Copyright (c) 2019, 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  *
  23  */
  24 
  25 #ifndef SHARE_GC_G1_G1PARALLELCLEANING_HPP
  26 #define SHARE_GC_G1_G1PARALLELCLEANING_HPP
  27 
  28 #include "gc/shared/parallelCleaning.hpp"
  29 
  30 #if INCLUDE_JVMCI
  31 class JVMCICleaningTask : public StackObj {
  32   volatile int       _cleaning_claimed;
  33 
  34 public:
  35   JVMCICleaningTask();
  36   // Clean JVMCI metadata handles.
  37   void work(bool unloading_occurred);
  38 
  39 private:
  40   bool claim_cleaning_task();
  41 };
  42 #endif
  43 
  44 // Do cleanup of some weakly held data in the same parallel task.
  45 // Assumes a non-moving context.
  46 class G1ParallelCleaningTask : public AbstractGangTask {
  47 private:
  48   bool                    _unloading_occurred;
  49   StringDedupCleaningTask _string_dedup_task;
  50   CodeCacheUnloadingTask  _code_cache_task;
  51 #if INCLUDE_JVMCI
  52   JVMCICleaningTask       _jvmci_cleaning_task;
  53 #endif
  54   KlassCleaningTask       _klass_cleaning_task;
  55 
  56 public:
  57   // The constructor is run in the VMThread.
  58   G1ParallelCleaningTask(BoolObjectClosure* is_alive,
  59                          uint num_workers,
  60                          bool unloading_occurred,
  61                          bool resize_dedup_table);
  62 
  63   void work(uint worker_id);
  64 };
  65 
  66 #endif // SHARE_GC_G1_G1PARALLELCLEANING_HPP