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src/share/vm/services/memPtr.cpp@d2a62e0f25eb (annotated)

src/share/vm/services/memPtr.cpp

Thu, 28 Jun 2012 17:03:16 -0400

author

zgu

date

Thu, 28 Jun 2012 17:03:16 -0400

changeset 3900

d2a62e0f25eb

child 3994

e5bf1c79ed5b

permissions

-rw-r--r--

6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain

zgu@3900	1	/*
zgu@3900	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
zgu@3900	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
zgu@3900	4	*
zgu@3900	5	* This code is free software; you can redistribute it and/or modify it
zgu@3900	6	* under the terms of the GNU General Public License version 2 only, as
zgu@3900	7	* published by the Free Software Foundation.
zgu@3900	8	*
zgu@3900	9	* This code is distributed in the hope that it will be useful, but WITHOUT
zgu@3900	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
zgu@3900	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
zgu@3900	12	* version 2 for more details (a copy is included in the LICENSE file that
zgu@3900	13	* accompanied this code).
zgu@3900	14	*
zgu@3900	15	* You should have received a copy of the GNU General Public License version
zgu@3900	16	* 2 along with this work; if not, write to the Free Software Foundation,
zgu@3900	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
zgu@3900	18	*
zgu@3900	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
zgu@3900	20	* or visit www.oracle.com if you need additional information or have any
zgu@3900	21	* questions.
zgu@3900	22	*
zgu@3900	23	*/
zgu@3900	24
zgu@3900	25	#include "precompiled.hpp"
zgu@3900	26	#include "services/memPtr.hpp"
zgu@3900	27	#include "services/memTracker.hpp"
zgu@3900	28
zgu@3900	29	volatile jint SequenceGenerator::_seq_number = 1;
zgu@3900	30	DEBUG_ONLY(jint SequenceGenerator::_max_seq_number = 1;)
zgu@3900	31	DEBUG_ONLY(volatile unsigned long SequenceGenerator::_generation = 0;)
zgu@3900	32
zgu@3900	33	jint SequenceGenerator::next() {
zgu@3900	34	jint seq = Atomic::add(1, &_seq_number);
zgu@3900	35	if (seq < 0) {
zgu@3900	36	MemTracker::shutdown(MemTracker::NMT_sequence_overflow);
zgu@3900	37	}
zgu@3900	38	assert(seq > 0, "counter overflow");
zgu@3900	39	DEBUG_ONLY(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;)
zgu@3900	40	return seq;
zgu@3900	41	}
zgu@3900	42
zgu@3900	43
zgu@3900	44
zgu@3900	45	bool VMMemRegion::contains(const VMMemRegion* mr) const {
zgu@3900	46	assert(base() != 0, "no base address");
zgu@3900	47	assert(size() != 0 || committed_size() != 0,
zgu@3900	48	"no range");
zgu@3900	49	address base_addr = base();
zgu@3900	50	address end_addr = base_addr +
zgu@3900	51	(is_reserve_record()? reserved_size(): committed_size());
zgu@3900	52	if (mr->is_reserve_record()) {
zgu@3900	53	if (mr->base() == base_addr && mr->size() == size()) {
zgu@3900	54	// the same range
zgu@3900	55	return true;
zgu@3900	56	}
zgu@3900	57	return false;
zgu@3900	58	} else if (mr->is_commit_record() || mr->is_uncommit_record()) {
zgu@3900	59	assert(mr->base() != 0 && mr->committed_size() > 0,
zgu@3900	60	"bad record");
zgu@3900	61	return (mr->base() >= base_addr &&
zgu@3900	62	(mr->base() + mr->committed_size()) <= end_addr);
zgu@3900	63	} else if (mr->is_type_tagging_record()) {
zgu@3900	64	assert(mr->base() != 0, "no base");
zgu@3900	65	return mr->base() == base_addr;
zgu@3900	66	} else if (mr->is_release_record()) {
zgu@3900	67	assert(mr->base() != 0 && mr->size() > 0,
zgu@3900	68	"bad record");
zgu@3900	69	return (mr->base() == base_addr && mr->size() == size());
zgu@3900	70	} else {
zgu@3900	71	assert(false, "what happened?");
zgu@3900	72	return false;
zgu@3900	73	}
zgu@3900	74	}