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/*
* Copyright (C) 2016-2023 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 "ICStats.h"
#include <wtf/TZoneMallocInlines.h>
namespace JSC {
WTF_MAKE_TZONE_ALLOCATED_IMPL(ICStats);
bool ICEvent::operator<(const ICEvent& other) const
{
if (m_classInfo != other.m_classInfo) {
if (!m_classInfo)
return true;
if (!other.m_classInfo)
return false;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
return strcmp(m_classInfo->className, other.m_classInfo->className) < 0;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
}
if (m_propertyName != other.m_propertyName)
return codePointCompare(m_propertyName.string(), other.m_propertyName.string()) < 0;
if (m_kind != other.m_kind)
return m_kind < other.m_kind;
return m_propertyLocation < other.m_propertyLocation;
}
void ICEvent::dump(PrintStream& out) const
{
out.print(m_kind, "(", m_classInfo ? m_classInfo->className : "<null>", ", ", m_propertyName, ")");
if (m_propertyLocation != Unknown)
out.print(m_propertyLocation == BaseObject ? " self" : " proto lookup");
}
void ICEvent::log() const
{
ICStats::singleton().add(*this);
}
Atomic<ICStats*> ICStats::s_instance;
ICStats::ICStats()
{
m_thread = Thread::create(
"JSC ICStats"_s,
[this] () {
Locker locker { m_lock };
for (;;) {
m_condition.waitFor(
m_lock, Seconds(1), [this] () -> bool { return m_shouldStop; });
if (m_shouldStop)
break;
dataLog("ICStats:\n");
{
Locker spectrumLocker { m_spectrum.getLock() };
auto list = m_spectrum.buildList(spectrumLocker);
for (unsigned i = list.size(); i--;)
dataLog(" ", *list[i].key, ": ", list[i].count, "\n");
}
}
});
}
ICStats::~ICStats()
{
{
Locker locker { m_lock };
m_shouldStop = true;
m_condition.notifyAll();
}
m_thread->waitForCompletion();
}
void ICStats::add(const ICEvent& event)
{
m_spectrum.add(event);
}
ICStats& ICStats::singleton()
{
for (;;) {
ICStats* result = s_instance.load();
if (result)
return *result;
ICStats* newStats = new ICStats();
if (s_instance.compareExchangeWeak(nullptr, newStats))
return *newStats;
delete newStats;
}
}
} // namespace JSC
namespace WTF {
using namespace JSC;
void printInternal(PrintStream& out, ICEvent::Kind kind)
{
switch (kind) {
#define ICEVENT_KIND_DUMP(name) case ICEvent::name: out.print(#name); return;
FOR_EACH_ICEVENT_KIND(ICEVENT_KIND_DUMP);
#undef ICEVENT_KIND_DUMP
}
RELEASE_ASSERT_NOT_REACHED();
}
} // namespace WTF
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