a39b17624a
7151532: DCmd for hotspot native memory tracking Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd Reviewed-by: acorn, coleenp, fparain
75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "services/memPtr.hpp"
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#include "services/memTracker.hpp"
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volatile jint SequenceGenerator::_seq_number = 1;
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DEBUG_ONLY(jint SequenceGenerator::_max_seq_number = 1;)
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DEBUG_ONLY(volatile unsigned long SequenceGenerator::_generation = 0;)
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jint SequenceGenerator::next() {
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jint seq = Atomic::add(1, &_seq_number);
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if (seq < 0) {
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MemTracker::shutdown(MemTracker::NMT_sequence_overflow);
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}
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assert(seq > 0, "counter overflow");
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DEBUG_ONLY(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;)
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return seq;
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}
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bool VMMemRegion::contains(const VMMemRegion* mr) const {
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assert(base() != 0, "no base address");
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assert(size() != 0 || committed_size() != 0,
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"no range");
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address base_addr = base();
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address end_addr = base_addr +
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(is_reserve_record()? reserved_size(): committed_size());
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if (mr->is_reserve_record()) {
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if (mr->base() == base_addr && mr->size() == size()) {
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// the same range
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return true;
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}
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return false;
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} else if (mr->is_commit_record() || mr->is_uncommit_record()) {
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assert(mr->base() != 0 && mr->committed_size() > 0,
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"bad record");
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return (mr->base() >= base_addr &&
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(mr->base() + mr->committed_size()) <= end_addr);
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} else if (mr->is_type_tagging_record()) {
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assert(mr->base() != 0, "no base");
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return mr->base() == base_addr;
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} else if (mr->is_release_record()) {
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assert(mr->base() != 0 && mr->size() > 0,
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"bad record");
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return (mr->base() == base_addr && mr->size() == size());
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} else {
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assert(false, "what happened?");
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return false;
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}
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}
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