Title: [233904] trunk/Source/WebKit
Revision
233904
Author
[email protected]
Date
2018-07-17 20:43:37 -0700 (Tue, 17 Jul 2018)

Log Message

RELEASE_ASSERT() under IPC::Connection::sendSync() from PluginProxy::supportsSnapshotting()
https://bugs.webkit.org/show_bug.cgi?id=187740
<rdar://problem/41818955>

Reviewed by Youenn Fablet.

As per the crash trace, PluginProxy::supportsSnapshotting() can be called during layout but does synchronous
IPC. As a result, we need to prevent WebCore re-entrancy by using DoNotProcessIncomingMessagesWhenWaitingForSyncReply
sendOption.

* WebProcess/Plugins/PluginProxy.cpp:
(WebKit::PluginProxy::supportsSnapshotting const):

Modified Paths

Diff

Modified: trunk/Source/WebKit/ChangeLog (233903 => 233904)


--- trunk/Source/WebKit/ChangeLog	2018-07-18 01:05:29 UTC (rev 233903)
+++ trunk/Source/WebKit/ChangeLog	2018-07-18 03:43:37 UTC (rev 233904)
@@ -1,5 +1,20 @@
 2018-07-17  Chris Dumez  <[email protected]>
 
+        RELEASE_ASSERT() under IPC::Connection::sendSync() from PluginProxy::supportsSnapshotting()
+        https://bugs.webkit.org/show_bug.cgi?id=187740
+        <rdar://problem/41818955>
+
+        Reviewed by Youenn Fablet.
+
+        As per the crash trace, PluginProxy::supportsSnapshotting() can be called during layout but does synchronous
+        IPC. As a result, we need to prevent WebCore re-entrancy by using DoNotProcessIncomingMessagesWhenWaitingForSyncReply
+        sendOption.
+
+        * WebProcess/Plugins/PluginProxy.cpp:
+        (WebKit::PluginProxy::supportsSnapshotting const):
+
+2018-07-17  Chris Dumez  <[email protected]>
+
         Turn on PSON in WebKitTestRunner
         https://bugs.webkit.org/show_bug.cgi?id=186542
 

Modified: trunk/Source/WebKit/WebProcess/Plugins/PluginProxy.cpp (233903 => 233904)


--- trunk/Source/WebKit/WebProcess/Plugins/PluginProxy.cpp	2018-07-18 01:05:29 UTC (rev 233903)
+++ trunk/Source/WebKit/WebProcess/Plugins/PluginProxy.cpp	2018-07-18 03:43:37 UTC (rev 233904)
@@ -234,7 +234,7 @@
         return false;
 
     bool isSupported = false;
-    if (m_connection && !m_connection->connection()->sendSync(Messages::PluginControllerProxy::SupportsSnapshotting(), Messages::PluginControllerProxy::SupportsSnapshotting::Reply(isSupported), m_pluginInstanceID))
+    if (m_connection && !m_connection->connection()->sendSync(Messages::PluginControllerProxy::SupportsSnapshotting(), Messages::PluginControllerProxy::SupportsSnapshotting::Reply(isSupported), m_pluginInstanceID, Seconds::infinity(), IPC::SendSyncOption::DoNotProcessIncomingMessagesWhenWaitingForSyncReply))
         return false;
 
     return isSupported;
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