[webkit-reviews] review granted: [Bug 197620] Wasm should cage the memory base pointers in structs : [Attachment 370065] Patch

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu May 16 18:34:45 PDT 2019

Saam Barati <sbarati at apple.com> has granted Keith Miller
<keith_miller at apple.com>'s request for review:
Bug 197620: Wasm should cage the memory base pointers in structs

Attachment 370065: Patch


--- Comment #2 from Saam Barati <sbarati at apple.com> ---
Comment on attachment 370065
  --> https://bugs.webkit.org/attachment.cgi?id=370065

View in context: https://bugs.webkit.org/attachment.cgi?id=370065&action=review


> Source/JavaScriptCore/ChangeLog:11
> +	   Currently, we use cageConditionally; this only matters for API
> +	   users since the web content process cannot disable primitive
> +	   gigacage. This patch also adds a set helper for union/intersection
> +	   of RegisterSets.

Do we have tests where Gigacage is disabled with Wasm enabled in JSC?

> Source/JavaScriptCore/wasm/WasmBinding.cpp:48
> +    GPRReg scratch = wasmCallingConventionAir().prologueScratch(0);


> Source/JavaScriptCore/wasm/WasmMemory.cpp:-442
> -	   m_memory.resize(m_size, desiredSize);

Seems like this was a bug? Do we have a test?

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