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src/share/vm/runtime/monitorChunk.hpp@63147986a428 (annotated)

src/share/vm/runtime/monitorChunk.hpp

Wed, 18 Sep 2013 07:02:10 -0700

author

dcubed

date

Wed, 18 Sep 2013 07:02:10 -0700

changeset 5743

63147986a428

parent 4153

b9a9ed0f8eeb

child 6876

710a3c8b516e

permissions

-rw-r--r--

8019835: Strings interned in different threads equal but does not ==
Summary: Add -XX:+VerifyStringTableAtExit option and code to verify StringTable invariants.
Reviewed-by: rdurbin, sspitsyn, coleenp

duke@435	1	/*
mikael@4153	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_MONITORCHUNK_HPP
stefank@2314	27
stefank@2314	28	#include "runtime/synchronizer.hpp"
stefank@2314	29
duke@435	30	// Data structure for holding monitors for one activation during
duke@435	31	// deoptimization.
duke@435	32
zgu@3900	33	class MonitorChunk: public CHeapObj<mtInternal> {
duke@435	34	private:
duke@435	35	int _number_of_monitors;
duke@435	36	BasicObjectLock* _monitors;
duke@435	37	BasicObjectLock* monitors() const { return _monitors; }
duke@435	38	MonitorChunk* _next;
duke@435	39	public:
duke@435	40	// Constructor
duke@435	41	MonitorChunk(int number_on_monitors);
duke@435	42	~MonitorChunk();
duke@435	43
duke@435	44	// link operations
duke@435	45	MonitorChunk* next() const { return _next; }
duke@435	46	void set_next(MonitorChunk* next) { _next = next; }
duke@435	47
duke@435	48	// Tells whether the monitor chunk is linked into the JavaThread
duke@435	49	bool is_linked() const { return next() != NULL; }
duke@435	50
duke@435	51	// Returns the number of monitors
duke@435	52	int number_of_monitors() const { return _number_of_monitors; }
duke@435	53
duke@435	54	// Returns the index'th monitor
duke@435	55	BasicObjectLock* at(int index) { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
duke@435	56
duke@435	57
duke@435	58	// Memory management
duke@435	59	void oops_do(OopClosure* f);
duke@435	60
duke@435	61	// Tells whether the addr point into the monitors.
duke@435	62	bool contains(void* addr) const { return (addr >= (void*) monitors()) && (addr < (void*) (monitors() + number_of_monitors())); }
duke@435	63	};
stefank@2314	64
stefank@2314	65	#endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP