Attachment 341075 Details for Bug 185903 – patch

[patch] patch

canvas-memory-limit-ios.patch (text/plain), 1.61 KB, created by Antti Koivisto on 2018-05-23 01:32:46 PDT

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Creator: Antti Koivisto

Created: 2018-05-23 01:32:46 PDT

Size: 1.61 KB

patch

obsolete

>Index: Source/WebCore/ChangeLog
>===================================================================
>--- Source/WebCore/ChangeLog	(revision 232107)
>+++ Source/WebCore/ChangeLog	(working copy)
>@@ -1,3 +1,20 @@
>+2018-05-23  Antti Koivisto  <antti@apple.com>
>+
>+        Page keeps reloading when viewing photos in google drive (rapid memory growth by adding large <canvas> elements)
>+        https://bugs.webkit.org/show_bug.cgi?id=185903
>+        <rdar://problem/38420562>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        The canvas memory usage limits don't work on iOS since the current 2GB minimum limit is
>+        larger than the maximum process size.
>+
>+        * html/HTMLCanvasElement.cpp:
>+        (WebCore::maxActivePixelMemory):
>+
>+        Always base this on the reported ramSize() on iOS. Make it still fairly large to not risk breaking
>+        any currently working content. In practice the limit computes to 448MB on device at the moment.
>+
> 2018-05-22  Myles C. Maxfield  <mmaxfield@apple.com>
> 
>         Text can wrap between hyphens and commas
>Index: Source/WebCore/html/HTMLCanvasElement.cpp
>===================================================================
>--- Source/WebCore/html/HTMLCanvasElement.cpp	(revision 231847)
>+++ Source/WebCore/html/HTMLCanvasElement.cpp	(working copy)
>@@ -196,7 +196,11 @@ static inline size_t maxActivePixelMemor
>     static size_t maxPixelMemory;
>     static std::once_flag onceFlag;
>     std::call_once(onceFlag, [] {
>+#if PLATFORM(IOS)
>+        maxPixelMemory = ramSize() / 2;
>+#else
>         maxPixelMemory = std::max(ramSize() / 4, 2151 * MB);
>+#endif
>     });
>     return maxPixelMemory;
> }

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