[Bug target/55610] cc1 is calling munmap() on part of itself on darwin

["egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55610

--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to CVS Commits from comment #11)
> The master branch has been updated by Iain D Sandoe <iains@gcc.gnu.org>:
> 
> https://gcc.gnu.org/g:22a982409323feb203401d345488a5a9c18e6733
> 
> commit r12-5759-g22a982409323feb203401d345488a5a9c18e6733
> Author: Iain Sandoe <iain@sandoe.co.uk>
> Date:   Sat Nov 13 12:39:09 2021 +0000
> 
>     Darwin: Rewrite host PCH support [PR 55610].
>     
>     We need to revise the PCH memory allocation scheme to enable
>     support for PIE on aarch64.  The rewrite uses a similar scheme
>     to the one used on Linux.
>     
>     We attempt to identify VM segments for each arch/OS version that
>     are always available to the compiler (note this is not general,
>     it only needs to work for the cc1* exes).
>     
>     If we cannot find the preferred segment we fall back to allowing
>     the kernel to supply one - this is more likely to fail when the
>     PCH read-in occurs (but that is trapped).
>     
>     In doing this we obviate the need to unmap any part of the
>     compiler __DATA segment - thus fixing PR 55610.
>     
>     Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
>     
>     gcc/ChangeLog:
>     
>             PR target/55610
>             * config/host-darwin.c (TRY_EMPTY_VM_SPACE,
>             SAFE_ALLOC_SIZE): New.
>             (darwin_gt_pch_get_address): Rewrite to use nominated
>             memory segments rather than part of the compiler __DATA
>             segment.
>             (darwin_gt_pch_use_address): Likewise.

So, ok to close this as FIXED now?