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/*
* Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "Watchpoint.h"
#include "LinkBuffer.h"
#include <wtf/CompilationThread.h>
#include <wtf/PassRefPtr.h>
namespace JSC {
Watchpoint::~Watchpoint()
{
if (isOnList())
remove();
}
WatchpointSet::WatchpointSet(WatchpointState state)
: m_state(state)
, m_setIsNotEmpty(false)
{
}
WatchpointSet::~WatchpointSet()
{
// Remove all watchpoints, so that they don't try to remove themselves. Note that we
// don't fire watchpoints on deletion. We assume that any code that is interested in
// watchpoints already also separately has a mechanism to make sure that the code is
// either keeping the watchpoint set's owner alive, or does some weak reference thing.
while (!m_set.isEmpty())
m_set.begin()->remove();
}
void WatchpointSet::add(Watchpoint* watchpoint)
{
ASSERT(!isCompilationThread());
ASSERT(state() != IsInvalidated);
if (!watchpoint)
return;
m_set.push(watchpoint);
m_setIsNotEmpty = true;
m_state = IsWatched;
}
void WatchpointSet::fireAllSlow()
{
ASSERT(state() == IsWatched);
WTF::storeStoreFence();
fireAllWatchpoints();
m_state = IsInvalidated;
WTF::storeStoreFence();
}
void WatchpointSet::fireAllWatchpoints()
{
while (!m_set.isEmpty())
m_set.begin()->fire();
}
void InlineWatchpointSet::add(Watchpoint* watchpoint)
{
inflate()->add(watchpoint);
}
WatchpointSet* InlineWatchpointSet::inflateSlow()
{
ASSERT(isThin());
ASSERT(!isCompilationThread());
WatchpointSet* fat = adoptRef(new WatchpointSet(decodeState(m_data))).leakRef();
WTF::storeStoreFence();
m_data = bitwise_cast<uintptr_t>(fat);
return fat;
}
void InlineWatchpointSet::freeFat()
{
ASSERT(isFat());
fat()->deref();
}
} // namespace JSC
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