Attachment 357594 Details for Bug 192804 – Fixed builds and incorporated Tim's comment

[patch] Fixed builds and incorporated Tim's comment

bug-192804-20181218120224.patch (text/plain), 4.04 KB, created by Ryosuke Niwa on 2018-12-18 12:02:25 PST

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Creator: Ryosuke Niwa

Created: 2018-12-18 12:02:25 PST

Size: 4.04 KB

patch

obsolete

>Subversion Revision: 239319
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 6ff69a5dcced4968f02d3d4bbe01f91e5c902ac0..97389a5b7181988dc3c74054bcb5006da0cf0378 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,26 @@
>+2018-12-17  Ryosuke Niwa  <rniwa@webkit.org>
>+
>+        Some iOS app crash in FrameLoader::checkCompleted
>+        https://bugs.webkit.org/show_bug.cgi?id=192804
>+        <rdar://problem/44240573>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        It's possible for the main thread to call into WebCore / UIWebView selectors while Web thread
>+        is trying to send a delegate message. Disable the release assertion while this is happening
>+        so that iOS app would not crash.
>+
>+        Unfortunately no new test as there is no way to easily test UIWebView in iOS,
>+        and this requires a race between the web thread & the main thread.
>+
>+        * dom/ScriptDisallowedScope.h:
>+        (WebCore::ScriptDisallowedScope::InMainThread::isScriptAllowed):
>+        * platform/ios/wak/WebCoreThread.h:
>+        * platform/ios/wak/WebCoreThread.mm:
>+        (WebThreadDelegateMessageScope::WebThreadDelegateMessageScope):
>+        (WebThreadDelegateMessageScope::~WebThreadDelegateMessageScope):
>+        (SendDelegateMessage):
>+
> 2018-12-17  Eric Carlson  <eric.carlson@apple.com>
> 
>         [MediaStream] A stream's first video frame should be rendered
>diff --git a/Source/WebCore/dom/ScriptDisallowedScope.h b/Source/WebCore/dom/ScriptDisallowedScope.h
>index 9b2b77f660054cc09092e1d939e5d2c929cbb986..a2b61b151175f458d71765aed95002f92de17fc2 100644
>--- a/Source/WebCore/dom/ScriptDisallowedScope.h
>+++ b/Source/WebCore/dom/ScriptDisallowedScope.h
>@@ -26,6 +26,10 @@
> #include "ContainerNode.h"
> #include <wtf/MainThread.h>
> 
>+#if PLATFORM(IOS_FAMILY)
>+#include "WebCoreThread.h"
>+#endif
>+
> namespace WebCore {
> 
> class ScriptDisallowedScope {
>@@ -86,7 +90,11 @@ public:
>         static bool isScriptAllowed()
>         {
>             ASSERT(isMainThread());
>+#if PLATFORM(IOS_FAMILY)
>+            return !s_count || webThreadDelegateMessageScopeCount;
>+#else
>             return !s_count;
>+#endif
>         }
>     };
>     
>diff --git a/Source/WebCore/platform/ios/wak/WebCoreThread.h b/Source/WebCore/platform/ios/wak/WebCoreThread.h
>index e7d7bc6816688896c1abe9f10105fd5ba88de082..e115405a5c7b49f89129627c840fe4d80e21c864 100644
>--- a/Source/WebCore/platform/ios/wak/WebCoreThread.h
>+++ b/Source/WebCore/platform/ios/wak/WebCoreThread.h
>@@ -44,6 +44,7 @@ typedef struct {
> } WebThreadContext;
>     
> extern volatile bool webThreadShouldYield;
>+extern volatile unsigned webThreadDelegateMessageScopeCount;
> 
> #ifdef __OBJC__
> @class NSRunLoop;
>diff --git a/Source/WebCore/platform/ios/wak/WebCoreThread.mm b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>index df0c0b1c6e7ecdee2d3fb090fa9e6cd4b7b7c916..b7336c1973ae8753d3858370801b6bb521da25d8 100644
>--- a/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>+++ b/Source/WebCore/platform/ios/wak/WebCoreThread.mm
>@@ -132,6 +132,8 @@ static void WebCoreObjCDeallocWithWebThreadLockImpl(id self, SEL _cmd);
> 
> static NSMutableArray* sAsyncDelegates = nil;
> 
>+WEBCORE_EXPORT volatile unsigned webThreadDelegateMessageScopeCount = 0;
>+
> static inline void SendMessage(NSInvocation* invocation)
> {
>     [invocation invoke];
>@@ -171,6 +173,16 @@ static void HandleDelegateSource(void*)
> #endif
> }
> 
>+class WebThreadDelegateMessageScope {
>+public:
>+    WebThreadDelegateMessageScope() { ++webThreadDelegateMessageScopeCount; }
>+    ~WebThreadDelegateMessageScope()
>+    {
>+        ASSERT(webThreadDelegateMessageScopeCount);
>+        --webThreadDelegateMessageScopeCount;
>+    }
>+};
>+
> static void SendDelegateMessage(NSInvocation* invocation)
> {
>     if (!WebThreadIsCurrent()) {
>@@ -194,6 +206,7 @@ static void SendDelegateMessage(NSInvocation* invocation)
> #endif
> 
>     {
>+        WebThreadDelegateMessageScope delegateScope;
>         // Code block created to scope JSC::JSLock::DropAllLocks outside of WebThreadLock()
>         JSC::JSLock::DropAllLocks dropAllLocks(WebCore::commonVM());
>         _WebThreadUnlock();

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Attachments on bug 192804: 357536 | 357594