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/*
* Copyright (C) 2015 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 "DFGAdaptiveStructureWatchpoint.h"
#if ENABLE(DFG_JIT)
#include "CodeBlock.h"
#include "JSCellInlines.h"
namespace JSC { namespace DFG {
AdaptiveStructureWatchpoint::AdaptiveStructureWatchpoint(const ObjectPropertyCondition& key, CodeBlock* codeBlock)
: Watchpoint(Watchpoint::Type::AdaptiveStructure)
, m_codeBlock(codeBlock)
, m_key(key)
{
RELEASE_ASSERT(key.watchingRequiresStructureTransitionWatchpoint());
RELEASE_ASSERT(!key.watchingRequiresReplacementWatchpoint());
}
AdaptiveStructureWatchpoint::AdaptiveStructureWatchpoint()
: Watchpoint(Watchpoint::Type::AdaptiveStructure)
, m_codeBlock(nullptr)
{
}
void AdaptiveStructureWatchpoint::initialize(const ObjectPropertyCondition& key, CodeBlock* codeBlock)
{
m_codeBlock = codeBlock;
m_key = key;
RELEASE_ASSERT(key.watchingRequiresStructureTransitionWatchpoint());
RELEASE_ASSERT(!key.watchingRequiresReplacementWatchpoint());
}
void AdaptiveStructureWatchpoint::install(VM&)
{
RELEASE_ASSERT(m_key.isWatchable(PropertyCondition::MakeNoChanges));
m_key.object()->structure()->addTransitionWatchpoint(this);
}
void AdaptiveStructureWatchpoint::fireInternal(VM& vm, const FireDetail& detail)
{
if (!m_codeBlock->isLive())
return;
if (m_key.isWatchable(PropertyCondition::EnsureWatchability)) {
install(vm);
return;
}
if (DFG::shouldDumpDisassembly()) {
dataLog(
"Firing watchpoint ", RawPointer(this), " (", m_key, ") on ", *m_codeBlock, "\n");
}
auto lazyDetail = createLazyFireDetail("Adaptation of ", m_key, " failed: ", detail);
m_codeBlock->jettison(
Profiler::JettisonDueToUnprofiledWatchpoint, CountReoptimization, &lazyDetail);
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)