Re: [Xen-devel] [PATCH 4/4] xen/ubsan: Introduce and use CONFIG_UBSAN

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> +config UBSAN
> +     bool "Undefined behaviour sanitizer"
> +     depends on X86
> +     ---help---
> +       Enable undefined behaviour sanitizer.
> +
> +       If unsure, say N here.

Could you perhaps expand it a bit? How does it sanitize it? With soap :-)?
And what 'undefinded behaviour's are we talking about? opcodes? 

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