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Re: [Xen-devel] [PATCH v2 3/3] xen: hook up UBSAN with CONFIG_UBSAN

To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Julien Grall <julien.grall@xxxxxxxxxx>
Date: Mon, 9 Oct 2017 15:31:35 +0100
Cc: Julien Grall <julien.grall@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
Delivery-date: Mon, 09 Oct 2017 14:31:52 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>



On 09/10/17 15:23, Andrew Cooper wrote:

On 09/10/17 15:11, Wei Liu wrote:

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 30c2769684..64955dc017 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig


Based on Julien's testing, shouldn't ARM64 also select HAS_UBSAN?

I tested it with some patches on top. Currently, the size of Xen Arm islimited to 2MB. That limit will be exploded when building with UBSAN.


So for now, I will leave that unselectable for both Arm32 and Arm64.

Cheers,

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References:
- [Xen-devel] [PATCH v2 0/3] Add support for using the Undefined Behaviour Sanitizer
  - From: Wei Liu
- [Xen-devel] [PATCH v2 3/3] xen: hook up UBSAN with CONFIG_UBSAN
  - From: Wei Liu
- Re: [Xen-devel] [PATCH v2 3/3] xen: hook up UBSAN with CONFIG_UBSAN
  - From: Andrew Cooper

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