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<title>[202458] trunk/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/202458">202458</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2016-06-24 15:52:47 -0700 (Fri, 24 Jun 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Unreviewed, rolling out <a href="http://trac.webkit.org/projects/webkit/changeset/202443">r202443</a>.
https://bugs.webkit.org/show_bug.cgi?id=159105
Introduced memory corruption crashes (Requested by ap on
#webkit).
Reverted changeset:
"Web Inspector: CRASH in backend at
Inspector::HeapFrontendDispatcher::garbageCollected + 552 when
closing frontend/inspected page"
https://bugs.webkit.org/show_bug.cgi?id=159075
http://trac.webkit.org/changeset/202443</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreinspectoragentsInspectorHeapAgentcpp">trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreinspectoragentsInspectorHeapAgenth">trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.h</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (202457 => 202458)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2016-06-24 22:44:10 UTC (rev 202457)
+++ trunk/Source/JavaScriptCore/ChangeLog 2016-06-24 22:52:47 UTC (rev 202458)
</span><span class="lines">@@ -1,3 +1,19 @@
</span><ins>+2016-06-24 Commit Queue <commit-queue@webkit.org>
+
+ Unreviewed, rolling out r202443.
+ https://bugs.webkit.org/show_bug.cgi?id=159105
+
+ Introduced memory corruption crashes (Requested by ap on
+ #webkit).
+
+ Reverted changeset:
+
+ "Web Inspector: CRASH in backend at
+ Inspector::HeapFrontendDispatcher::garbageCollected + 552 when
+ closing frontend/inspected page"
+ https://bugs.webkit.org/show_bug.cgi?id=159075
+ http://trac.webkit.org/changeset/202443
+
</ins><span class="cx"> 2016-06-24 Brian Burg <bburg@apple.com>
</span><span class="cx">
</span><span class="cx"> Web Inspector: CRASH in backend at Inspector::HeapFrontendDispatcher::garbageCollected + 552 when closing frontend/inspected page
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreinspectoragentsInspectorHeapAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.cpp (202457 => 202458)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.cpp 2016-06-24 22:44:10 UTC (rev 202457)
+++ trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.cpp 2016-06-24 22:52:47 UTC (rev 202458)
</span><span class="lines">@@ -39,48 +39,6 @@
</span><span class="cx">
</span><span class="cx"> namespace Inspector {
</span><span class="cx">
</span><del>-class SendGarbageCollectionEventsTask {
-public:
- SendGarbageCollectionEventsTask(HeapFrontendDispatcher&);
- void addGarbageCollection(RefPtr<Inspector::Protocol::Heap::GarbageCollection>&&);
- void reset();
-private:
- void timerFired();
-
- HeapFrontendDispatcher& m_frontendDispatcher;
- Vector<RefPtr<Inspector::Protocol::Heap::GarbageCollection>> m_garbageCollections;
- RunLoop::Timer<SendGarbageCollectionEventsTask> m_timer;
-};
-
-SendGarbageCollectionEventsTask::SendGarbageCollectionEventsTask(HeapFrontendDispatcher& frontendDispatcher)
- : m_frontendDispatcher(frontendDispatcher)
- , m_timer(RunLoop::current(), this, &SendGarbageCollectionEventsTask::timerFired)
-{
-}
-
-void SendGarbageCollectionEventsTask::addGarbageCollection(RefPtr<Inspector::Protocol::Heap::GarbageCollection>&& garbageCollection)
-{
- m_garbageCollections.append(WTFMove(garbageCollection));
-
- if (!m_timer.isActive())
- m_timer.startOneShot(0);
-}
-
-void SendGarbageCollectionEventsTask::reset()
-{
- m_timer.stop();
- m_garbageCollections.clear();
-}
-
-void SendGarbageCollectionEventsTask::timerFired()
-{
- // The timer is stopped on agent destruction, so this method will never be called after agent has been destroyed.
- for (auto& event : m_garbageCollections)
- m_frontendDispatcher.garbageCollected(event);
-
- m_garbageCollections.clear();
-}
-
</del><span class="cx"> InspectorHeapAgent::InspectorHeapAgent(AgentContext& context)
</span><span class="cx"> : InspectorAgentBase(ASCIILiteral("Heap"))
</span><span class="cx"> , m_injectedScriptManager(context.injectedScriptManager)
</span><span class="lines">@@ -87,13 +45,11 @@
</span><span class="cx"> , m_frontendDispatcher(std::make_unique<HeapFrontendDispatcher>(context.frontendRouter))
</span><span class="cx"> , m_backendDispatcher(HeapBackendDispatcher::create(context.backendDispatcher, this))
</span><span class="cx"> , m_environment(context.environment)
</span><del>- , m_sendGarbageCollectionEventsTask(std::make_unique<SendGarbageCollectionEventsTask>(*m_frontendDispatcher))
</del><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> InspectorHeapAgent::~InspectorHeapAgent()
</span><span class="cx"> {
</span><del>- m_sendGarbageCollectionEventsTask->reset();
</del><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> void InspectorHeapAgent::didCreateFrontendAndBackend(FrontendRouter*, BackendDispatcher*)
</span><span class="lines">@@ -125,7 +81,6 @@
</span><span class="cx"> m_enabled = false;
</span><span class="cx">
</span><span class="cx"> m_environment.vm().heap.removeObserver(this);
</span><del>- m_sendGarbageCollectionEventsTask->reset();
</del><span class="cx">
</span><span class="cx"> clearHeapSnapshots();
</span><span class="cx"> }
</span><span class="lines">@@ -321,6 +276,9 @@
</span><span class="cx">
</span><span class="cx"> // FIXME: Include number of bytes freed by collection.
</span><span class="cx">
</span><ins>+ double startTime = m_gcStartTime;
+ double endTime = m_environment.executionStopwatch()->elapsedTime();
+
</ins><span class="cx"> // Dispatch the event asynchronously because this method may be
</span><span class="cx"> // called between collection and sweeping and we don't want to
</span><span class="cx"> // create unexpected JavaScript allocations that the Sweeper does
</span><span class="lines">@@ -328,12 +286,16 @@
</span><span class="cx"> // with WebKitLegacy's in process inspector which shares the same
</span><span class="cx"> // VM as the inspected page.
</span><span class="cx">
</span><del>- m_sendGarbageCollectionEventsTask->addGarbageCollection(Inspector::Protocol::Heap::GarbageCollection::create()
- .setType(protocolTypeForHeapOperation(operation))
- .setStartTime(m_gcStartTime)
- .setEndTime(m_environment.executionStopwatch()->elapsedTime())
- .release());
</del><ins>+ RunLoop::current().dispatch([this, startTime, endTime, operation]() {
+ auto collection = Inspector::Protocol::Heap::GarbageCollection::create()
+ .setType(protocolTypeForHeapOperation(operation))
+ .setStartTime(startTime)
+ .setEndTime(endTime)
+ .release();
</ins><span class="cx">
</span><ins>+ m_frontendDispatcher->garbageCollected(WTFMove(collection));
+ });
+
</ins><span class="cx"> m_gcStartTime = NAN;
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreinspectoragentsInspectorHeapAgenth"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.h (202457 => 202458)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.h 2016-06-24 22:44:10 UTC (rev 202457)
+++ trunk/Source/JavaScriptCore/inspector/agents/InspectorHeapAgent.h 2016-06-24 22:52:47 UTC (rev 202458)
</span><span class="lines">@@ -37,7 +37,6 @@
</span><span class="cx"> namespace Inspector {
</span><span class="cx">
</span><span class="cx"> class InjectedScriptManager;
</span><del>-class SendGarbageCollectionEventsTask;
</del><span class="cx"> typedef String ErrorString;
</span><span class="cx">
</span><span class="cx"> class JS_EXPORT_PRIVATE InspectorHeapAgent : public InspectorAgentBase, public HeapBackendDispatcherHandler, public JSC::HeapObserver {
</span><span class="lines">@@ -74,8 +73,6 @@
</span><span class="cx"> RefPtr<HeapBackendDispatcher> m_backendDispatcher;
</span><span class="cx"> InspectorEnvironment& m_environment;
</span><span class="cx">
</span><del>- std::unique_ptr<SendGarbageCollectionEventsTask> m_sendGarbageCollectionEventsTask;
-
</del><span class="cx"> bool m_enabled { false };
</span><span class="cx"> bool m_tracking { false };
</span><span class="cx"> double m_gcStartTime { NAN };
</span></span></pre>
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