mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/*
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* Copyright (C) 2013, 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(DFG_JIT)
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#include "CodeOrigin.h"
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#include "DFGExitProfile.h"
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namespace JSC { namespace DFG {
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struct BasicBlock;
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struct Node;
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// Provides for the OSR exit profiling functionality that is common between the DFG
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// and the FTL.
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struct OSRExitBase {
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OSRExitBase(ExitKind kind, CodeOrigin origin, CodeOrigin originForProfile, bool wasHoisted)
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: m_kind(kind)
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, m_wasHoisted(wasHoisted)
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, m_codeOrigin(origin)
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, m_codeOriginForExitProfile(originForProfile)
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{
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ASSERT(m_codeOrigin.isSet());
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ASSERT(m_codeOriginForExitProfile.isSet());
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}
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uint32_t m_count { 0 };
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ExitKind m_kind;
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bool m_wasHoisted;
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CodeOrigin m_codeOrigin;
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CodeOrigin m_codeOriginForExitProfile;
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CallSiteIndex m_exceptionHandlerCallSiteIndex;
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ALWAYS_INLINE bool isExceptionHandler() const
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{
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return m_kind == ExceptionCheck || m_kind == GenericUnwind;
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}
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// True if this exit is used as an exception handler for unwinding. This happens to only be set when
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// isExceptionHandler is true, but all this actually means is that the OSR exit will assume that the
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// machine state is as it would be coming out of genericUnwind.
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ALWAYS_INLINE bool isGenericUnwindHandler() const
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{
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return m_kind == GenericUnwind;
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}
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protected:
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void considerAddingAsFrequentExitSite(CodeBlock* profiledCodeBlock, ExitingJITType jitType)
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{
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if (m_count)
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considerAddingAsFrequentExitSiteSlow(profiledCodeBlock, jitType);
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}
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private:
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void considerAddingAsFrequentExitSiteSlow(CodeBlock* profiledCodeBlock, ExitingJITType);
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};
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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