6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
/*
* Copyright (c) 2012 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.
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#ifndef SHARE_VM_MEMORY_METASPACECOUNTERS_HPP
#define SHARE_VM_MEMORY_METASPACECOUNTERS_HPP
#include "runtime/perfData.hpp"
class MetaspaceCounters: public CHeapObj<mtClass> {
friend class VMStructs;
PerfVariable* _current_size;
PerfVariable* _capacity;
PerfVariable* _used;
PerfVariable* _max_capacity;
char* _name_space;
static MetaspaceCounters* _metaspace_counters;
void initialize(size_t min_capacity,
size_t max_capacity,
size_t curr_capacity,
size_t used);
public:
MetaspaceCounters();
~MetaspaceCounters();
void update_capacity();
void update_used();
void update_max_capacity();
void update_all();
static void initialize_performance_counters();
static void update_performance_counters();
};
#endif // SHARE_VM_MEMORY_METASPACECOUNTERS_HPP