mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
119 lines
4.4 KiB
C++
119 lines
4.4 KiB
C++
/*
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* Copyright (C) 2012, 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(JIT)
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#include "AdaptiveInferredPropertyValueWatchpointBase.h"
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#include "ObjectPropertyCondition.h"
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#include "Watchpoint.h"
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#include <wtf/Bag.h>
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#include <wtf/FastMalloc.h>
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#include <wtf/Noncopyable.h>
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namespace JSC {
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class CodeBlock;
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class StructureStubInfo;
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class WatchpointsOnStructureStubInfo;
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class StructureTransitionStructureStubClearingWatchpoint final : public Watchpoint {
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WTF_MAKE_NONCOPYABLE(StructureTransitionStructureStubClearingWatchpoint);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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StructureTransitionStructureStubClearingWatchpoint(const ObjectPropertyCondition& key, WatchpointsOnStructureStubInfo& holder)
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: Watchpoint(Watchpoint::Type::StructureTransitionStructureStubClearing)
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, m_holder(&holder)
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, m_key(key)
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{
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}
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void fireInternal(VM&, const FireDetail&);
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private:
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// Own destructor may not be called. Keep members trivially destructible.
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JSC_WATCHPOINT_FIELD(PackedPtr<WatchpointsOnStructureStubInfo>, m_holder);
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JSC_WATCHPOINT_FIELD(ObjectPropertyCondition, m_key);
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};
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class AdaptiveValueStructureStubClearingWatchpoint final : public AdaptiveInferredPropertyValueWatchpointBase {
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using Base = AdaptiveInferredPropertyValueWatchpointBase;
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WTF_MAKE_NONCOPYABLE(AdaptiveValueStructureStubClearingWatchpoint);
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WTF_MAKE_FAST_ALLOCATED;
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void handleFire(VM&, const FireDetail&) final;
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public:
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AdaptiveValueStructureStubClearingWatchpoint(const ObjectPropertyCondition& key, WatchpointsOnStructureStubInfo& holder)
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: Base(key)
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, m_holder(&holder)
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{
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RELEASE_ASSERT(key.condition().kind() == PropertyCondition::Equivalence);
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}
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private:
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PackedPtr<WatchpointsOnStructureStubInfo> m_holder;
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};
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class WatchpointsOnStructureStubInfo final {
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WTF_MAKE_NONCOPYABLE(WatchpointsOnStructureStubInfo);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
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: m_codeBlock(codeBlock)
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, m_stubInfo(stubInfo)
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{
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}
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using Node = Variant<StructureTransitionStructureStubClearingWatchpoint, AdaptiveValueStructureStubClearingWatchpoint>;
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Node& addWatchpoint(const ObjectPropertyCondition& key);
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static void ensureReferenceAndInstallWatchpoint(
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std::unique_ptr<WatchpointsOnStructureStubInfo>& holderRef,
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CodeBlock*, StructureStubInfo*, const ObjectPropertyCondition& key);
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static Watchpoint* ensureReferenceAndAddWatchpoint(
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std::unique_ptr<WatchpointsOnStructureStubInfo>& holderRef,
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CodeBlock*, StructureStubInfo*);
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CodeBlock* codeBlock() const { return m_codeBlock; }
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StructureStubInfo* stubInfo() const { return m_stubInfo; }
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bool isValid() const;
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private:
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CodeBlock* m_codeBlock;
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StructureStubInfo* m_stubInfo;
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// FIXME: use less memory for the entries in this Bag:
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// https://bugs.webkit.org/show_bug.cgi?id=202380
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Bag<WTF::Variant<StructureTransitionStructureStubClearingWatchpoint, AdaptiveValueStructureStubClearingWatchpoint>> m_watchpoints;
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};
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} // namespace JSC
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#endif // ENABLE(JIT)
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