src/hotspot/share/gc/z/zNMethodTable.hpp

/*
 * Copyright (c) 2017, 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.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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#ifndef SHARE_GC_Z_ZNMETHODTABLE_HPP
#define SHARE_GC_Z_ZNMETHODTABLE_HPP

#include "gc/z/zGlobals.hpp"
#include "gc/z/zNMethodTableEntry.hpp"
#include "memory/allocation.hpp"

class ZNMethodTable : public AllStatic {
private:
  static ZNMethodTableEntry* _table;
  static size_t              _size;
  static size_t              _nregistered;
  static size_t              _nunregistered;
  static volatile size_t     _claimed ATTRIBUTE_ALIGNED(ZCacheLineSize);

  static ZNMethodTableEntry create_entry(nmethod* nm);
  static void destroy_entry(ZNMethodTableEntry entry);

  static nmethod* method(ZNMethodTableEntry entry);

  static size_t first_index(const nmethod* nm, size_t size);
  static size_t next_index(size_t prev_index, size_t size);

  static bool register_entry(ZNMethodTableEntry* table, size_t size, ZNMethodTableEntry entry);
  static bool unregister_entry(ZNMethodTableEntry* table, size_t size, const nmethod* nm);

  static void rebuild(size_t new_size);
  static void rebuild_if_needed();

  static void log_register(const nmethod* nm, ZNMethodTableEntry entry);
  static void log_unregister(const nmethod* nm);

  static void entry_oops_do(ZNMethodTableEntry entry, OopClosure* cl);

public:
  static size_t registered_nmethods();
  static size_t unregistered_nmethods();

  static void register_nmethod(nmethod* nm);
  static void unregister_nmethod(nmethod* nm);

  static void gc_prologue();
  static void gc_epilogue();

  static void oops_do(OopClosure* cl);
};

#endif // SHARE_GC_Z_ZNMETHODTABLE_HPP