[PATCH][version 3]add -ftrivial-auto-var-init and variable attribute "uninitialized" to gcc

Kees Cook keescook@chromium.org
Mon Jun 21 16:18:45 GMT 2021


On Mon, Jun 21, 2021 at 03:39:45PM +0000, Qing Zhao wrote:
> So, if “pattern value” is “0xFFFFFFFFFFFFFFFF”, then it’s a valid canonical virtual memory address.  However, for most OS, “0xFFFFFFFFFFFFFFFF” should be not in user space.
> 
> My question is, is “0xFFFFFFFFFFFFFFFFF” good for pointer? Or “0xAAAAAAAAAAAAAAAA” better?

I think 0xFF repeating is fine for this version. Everything else is a
"nice to have" for the pattern-init, IMO. :)

-- 
Kees Cook


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