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FrameMemoryMonitor.cpp
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92 lines (78 loc) · 2.95 KB
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/*
* Copyright (C) 2025 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. AND ITS CONTRIBUTORS ``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 ITS 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 "FrameMemoryMonitor.h"
#include "DocumentQuirks.h"
#include "DocumentView.h"
#include "LocalFrame.h"
#include "LocalFrameInlines.h"
#include "LocalFrameLoaderClient.h"
namespace WebCore {
Ref<FrameMemoryMonitor> FrameMemoryMonitor::create(const LocalFrame& frame)
{
return adoptRef(*new FrameMemoryMonitor(frame));
}
FrameMemoryMonitor::FrameMemoryMonitor(const LocalFrame& frame)
: m_frame(frame)
{
}
void FrameMemoryMonitor::setUsage(size_t bytes)
{
if (m_usageHasExceeded)
return;
// FIXME: Add support for memory usage deltas
m_currentMemoryUsage = bytes;
checkMemoryPressureAndUnloadFrameIfNeeded();
}
void FrameMemoryMonitor::checkMemoryPressureAndUnloadFrameIfNeeded()
{
if (m_usageHasExceeded)
return;
if (m_currentMemoryUsage.hasOverflowed() || m_currentMemoryUsage > m_maxMemoryAllowedPerFrame) {
m_exceedCount++;
if (m_exceedCount >= m_memoryPressureConsecutiveLimit) {
m_usageHasExceeded = true;
unloadFrameAndShowMemoryMonitorError();
}
} else
m_exceedCount = 0;
}
void FrameMemoryMonitor::unloadFrameAndShowMemoryMonitorError()
{
if (RefPtr frame = m_frame.get()) {
if (RefPtr document = m_frame->document()) {
if (document->quirks().shouldUnloadHeavyFrame()) {
// FIXME: Prevent any navigations of an unloaded frame
frame->showMemoryMonitorError();
}
}
}
}
void FrameMemoryMonitor::lowerAllMemoryLimitsForTesting()
{
m_maxMemoryAllowedPerFrame = 1;
m_memoryPressureConsecutiveLimit = 0;
}
} // namespace WebCore