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Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012, 2013, 2014 Apple Inc. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#include "config.h"
	27	#include "Watchpoint.h"
	28
	29	#include <wtf/CompilationThread.h>
	30	#include <wtf/PassRefPtr.h>
	31
	32	namespace JSC {
	33
	34	void StringFireDetail::dump(PrintStream& out) const
	35	{
	36	out.print(m_string);
	37	}
	38
	39	Watchpoint::~Watchpoint()
	40	{
	41	if (isOnList())
	42	remove();
	43	}
	44
	45	WatchpointSet::WatchpointSet(WatchpointState state)
	46	: m_state(state)
	47	, m_setIsNotEmpty(false)
	48	{
	49	}
	50
	51	WatchpointSet::~WatchpointSet()
	52	{
	53	// Remove all watchpoints, so that they don't try to remove themselves. Note that we
	54	// don't fire watchpoints on deletion. We assume that any code that is interested in
	55	// watchpoints already also separately has a mechanism to make sure that the code is
	56	// either keeping the watchpoint set's owner alive, or does some weak reference thing.
	57	while (!m_set.isEmpty())
	58	m_set.begin()->remove();
	59	}
	60
	61	void WatchpointSet::add(Watchpoint* watchpoint)
	62	{
	63	ASSERT(!isCompilationThread());
	64	ASSERT(state() != IsInvalidated);
	65	if (!watchpoint)
	66	return;
	67	m_set.push(watchpoint);
	68	m_setIsNotEmpty = true;
	69	m_state = IsWatched;
	70	}
	71
	72	void WatchpointSet::fireAllSlow(const FireDetail& detail)
	73	{
	74	ASSERT(state() == IsWatched);
	75
	76	WTF::storeStoreFence();
	77	fireAllWatchpoints(detail);
	78	m_state = IsInvalidated;
	79	WTF::storeStoreFence();
	80	}
	81
	82	void WatchpointSet::fireAllSlow(const char* reason)
	83	{
	84	fireAllSlow(StringFireDetail(reason));
	85	}
	86
	87	void WatchpointSet::fireAllWatchpoints(const FireDetail& detail)
	88	{
	89	while (!m_set.isEmpty())
	90	m_set.begin()->fire(detail);
	91	}
	92
	93	void InlineWatchpointSet::add(Watchpoint* watchpoint)
	94	{
	95	inflate()->add(watchpoint);
	96	}
	97
	98	void InlineWatchpointSet::fireAll(const char* reason)
	99	{
	100	fireAll(StringFireDetail(reason));
	101	}
	102
	103	WatchpointSet* InlineWatchpointSet::inflateSlow()
	104	{
	105	ASSERT(isThin());
	106	ASSERT(!isCompilationThread());
	107	WatchpointSet* fat = adoptRef(new WatchpointSet(decodeState(m_data))).leakRef();
	108	WTF::storeStoreFence();
	109	m_data = bitwise_cast<uintptr_t>(fat);
	110	return fat;
	111	}
	112
	113	void InlineWatchpointSet::freeFat()
	114	{
	115	ASSERT(isFat());
	116	fat()->deref();
	117	}
	118
	119	} // namespace JSC
	120