rev 53848 : 8219469: ZGC: Extract functions out from ZNMethodTable into new ZNMethod class

   1 /*
   2  * Copyright (c) 2017, 2018, 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 #ifndef SHARE_GC_Z_ZNMETHODTABLE_HPP
  25 #define SHARE_GC_Z_ZNMETHODTABLE_HPP
  26 
  27 #include "gc/z/zArray.hpp"
  28 #include "gc/z/zGlobals.hpp"
  29 #include "gc/z/zLock.hpp"
  30 #include "gc/z/zNMethodTableEntry.hpp"
  31 #include "gc/z/zNMethodTableIteration.hpp"
  32 #include "memory/allocation.hpp"
  33 
  34 class nmethod;
  35 class ZNMethodClosure;
  36 class ZNMethodData;
  37 class ZNMethodDataOops;
  38 class ZWorkers;
  39 
  40 class ZNMethodTable : public AllStatic {
  41 private:
  42   static ZNMethodTableEntry*    _table;
  43   static size_t                 _size;
  44   static size_t                 _nregistered;
  45   static size_t                 _nunregistered;
  46   static ZNMethodTableIteration _iteration;
  47 
  48   static ZNMethodTableEntry* create(size_t size);
  49   static void destroy(ZNMethodTableEntry* table);
  50 
  51   static void attach_gc_data(nmethod* nm);
  52   static void detach_gc_data(nmethod* nm);
  53 
  54   static size_t first_index(const nmethod* nm, size_t size);
  55   static size_t next_index(size_t prev_index, size_t size);
  56 
  57   static void wait_until_iteration_done();
  58 
  59   static bool register_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm);
  60   static void unregister_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm);
  61 
  62   static void rebuild(size_t new_size);
  63   static void rebuild_if_needed();
  64 
  65   static void log_register(const nmethod* nm);
  66   static void log_unregister(const nmethod* nm);
  67 
  68 public:
  69   static size_t registered_nmethods();
  70   static size_t unregistered_nmethods();
  71 
  72   static void register_nmethod(nmethod* nm);
  73   static void unregister_nmethod(nmethod* nm);
  74   static void disarm_nmethod(nmethod* nm);
  75 
  76   static ZReentrantLock* lock_for_nmethod(nmethod* nm);
  77 
  78   static void oops_do(OopClosure* cl);
  79 
  80   static void oops_do(nmethod* nm, OopClosure* cl);
  81 
  82   static void nmethods_do_begin();
  83   static void nmethods_do_end();
  84   static void nmethods_do(ZNMethodClosure* cl);
  85 
  86   static void unlink(ZWorkers* workers, bool unloading_occurred);
  87   static void purge(ZWorkers* workers);
  88 };
  89 
  90 #endif // SHARE_GC_Z_ZNMETHODTABLE_HPP
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