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/*
* Copyright (C) 2011 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 "DFGExitProfile.h"
#include <wtf/PassOwnPtr.h>
namespace JSC { namespace DFG {
ExitProfile::ExitProfile() { }
ExitProfile::~ExitProfile() { }
bool ExitProfile::add(const FrequentExitSite& site)
{
// If we've never seen any frequent exits then create the list and put this site
// into it.
if (!m_frequentExitSites) {
m_frequentExitSites = adoptPtr(new Vector<FrequentExitSite>());
m_frequentExitSites->append(site);
return true;
}
// Don't add it if it's already there. This is O(n), but that's OK, because we
// know that the total number of places where code exits tends to not be large,
// and this code is only used when recompilation is triggered.
for (unsigned i = 0; i < m_frequentExitSites->size(); ++i) {
if (m_frequentExitSites->at(i) == site)
return false;
}
m_frequentExitSites->append(site);
return true;
}
Vector<FrequentExitSite> ExitProfile::exitSitesFor(unsigned bytecodeIndex)
{
Vector<FrequentExitSite> result;
if (!m_frequentExitSites)
return result;
for (unsigned i = 0; i < m_frequentExitSites->size(); ++i) {
if (m_frequentExitSites->at(i).bytecodeOffset() == bytecodeIndex)
result.append(m_frequentExitSites->at(i));
}
return result;
}
bool ExitProfile::hasExitSite(const FrequentExitSite& site) const
{
if (!m_frequentExitSites)
return false;
for (unsigned i = m_frequentExitSites->size(); i--;) {
if (m_frequentExitSites->at(i) == site)
return true;
}
return false;
}
QueryableExitProfile::QueryableExitProfile(const ExitProfile& profile)
{
if (!profile.m_frequentExitSites)
return;
for (unsigned i = 0; i < profile.m_frequentExitSites->size(); ++i)
m_frequentExitSites.add(profile.m_frequentExitSites->at(i));
}
QueryableExitProfile::~QueryableExitProfile() { }
} } // namespace JSC::DFG
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