mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
/*
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* Copyright (C) 2011, 2016 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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#include "config.h"
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#include "DFGExitProfile.h"
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#if ENABLE(DFG_JIT)
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#include "CodeBlock.h"
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#include "VMInlines.h"
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namespace JSC { namespace DFG {
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void FrequentExitSite::dump(PrintStream& out) const
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{
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out.print(m_bytecodeIndex, ": ", m_kind, "/", m_jitType, "/", m_inlineKind);
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}
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ExitProfile::ExitProfile() { }
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ExitProfile::~ExitProfile() { }
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bool ExitProfile::add(CodeBlock* owner, const FrequentExitSite& site)
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{
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RELEASE_ASSERT(site.jitType() != ExitFromAnything);
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RELEASE_ASSERT(site.inlineKind() != ExitFromAnyInlineKind);
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ConcurrentJSLocker locker(owner->unlinkedCodeBlock()->m_lock);
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CODEBLOCK_LOG_EVENT(owner, "frequentExit", (site));
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dataLogLnIf(Options::verboseExitProfile(), pointerDump(owner), ": Adding exit site: ", site);
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ExitProfile& profile = owner->unlinkedCodeBlock()->exitProfile();
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// If we've never seen any frequent exits then create the list and put this site
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// into it.
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if (!profile.m_frequentExitSites) {
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profile.m_frequentExitSites = makeUnique<Vector<FrequentExitSite>>();
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profile.m_frequentExitSites->append(site);
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return true;
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}
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// Don't add it if it's already there. This is O(n), but that's OK, because we
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// know that the total number of places where code exits tends to not be large,
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// and this code is only used when recompilation is triggered.
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for (unsigned i = 0; i < profile.m_frequentExitSites->size(); ++i) {
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if (profile.m_frequentExitSites->at(i) == site)
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return false;
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}
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profile.m_frequentExitSites->append(site);
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return true;
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}
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Vector<FrequentExitSite> ExitProfile::exitSitesFor(BytecodeIndex bytecodeIndex)
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{
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Vector<FrequentExitSite> result;
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if (!m_frequentExitSites)
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return result;
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for (unsigned i = 0; i < m_frequentExitSites->size(); ++i) {
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if (m_frequentExitSites->at(i).bytecodeIndex() == bytecodeIndex)
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result.append(m_frequentExitSites->at(i));
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}
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return result;
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}
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bool ExitProfile::hasExitSite(const ConcurrentJSLocker&, const FrequentExitSite& site) const
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{
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if (!m_frequentExitSites)
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return false;
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for (unsigned i = m_frequentExitSites->size(); i--;) {
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if (site.subsumes(m_frequentExitSites->at(i)))
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return true;
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}
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return false;
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}
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QueryableExitProfile::QueryableExitProfile() { }
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QueryableExitProfile::~QueryableExitProfile() { }
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void QueryableExitProfile::initialize(UnlinkedCodeBlock* unlinkedCodeBlock)
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{
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ConcurrentJSLocker locker(unlinkedCodeBlock->m_lock);
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const ExitProfile& profile = unlinkedCodeBlock->exitProfile();
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if (!profile.m_frequentExitSites)
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return;
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for (unsigned i = 0; i < profile.m_frequentExitSites->size(); ++i)
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m_frequentExitSites.add(profile.m_frequentExitSites->at(i));
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}
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} } // namespace JSC::DFG
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#endif
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