[PATCH v2 3/3] aarch64: GCS: add clone3 tests for shadow stack

[Yury Khrustalev]

On Tue, Sep 09, 2025 at 11:31:53AM -0300, Adhemerval Zanella Netto wrote:
> 
> > Parsing /proc/self/smaps requires much more code, I'll add it in the
> > next version of the patch. After the thread started we'll have 2
> > mappings with with the ss flag: parent and child. After cancellation we
> > expect 1 mapping (the parent one).
> 
> It depends if the kernel supports MADV_GUARD_INSTALL and if the pthread
> requires a guard page.  I think to simplify you can disable the guard page
> to always expect one mapping.

Unless I'm missing something, I don't think guard page is involved here
at all. We have parent and child shadow stacks after the thread started
and only parent's shadow stack remains when the thread is cancelled.

Regards,
Yury