Re: [PATCH] Add native windows on arm64 support

Hi,

On 2022-05-10 10:01:55 +0900, Michael Paquier wrote:
> On Mon, May 09, 2022 at 12:44:22PM +0100, Niyas Sait wrote:
> > Microsoft updated documentation [1] and clarified that ASLR cannot be
> > disabled for Arm64 targets.
> > 
> > Because ASLR can't be disabled on ARM, ARM64, or ARM64EC architectures,
> > > /DYNAMICBASE:NO isn't supported for these targets.
> 
> Better than nothing, I guess, though this does not stand as a reason
> explaining why this choice has been made.  And it looks like we will
> never know.  We are going to need more advanced testing to check that
> DYNAMICBASE is stable enough if we begin to enable it.  Perhaps we
> should really look at that for all the build targets we currently
> support rather than just ARM, for the most modern Win32 environments
> if we are going to cut support for most of the oldest releases..

I accidentally did a lot of testing with DYNAMICBASE - I accidentally
mistranslated MSBuildProject.pm's <RandomizedBaseAddress>false</> to adding
/DYNAMICBASE in the meson port. Survived several hundred CI cycles and dozens
of local runs without observing any problems related to that.

Which doesn't surprise me, given the way we reserve space in the new process.

Greetings,

Andres Freund