fix committed stat

[maxbachmann]

_mi_os_free reduces the stat by the full size without taking uncommitted sections into account. For this reason we have to add the uncommitted sections to the stat before calling it.

[maxbachmann]

This should fix https://github.com/microsoft/mimalloc/issues/929

[maxbachmann]

As an alternative fix we could call _mi_os_free_ex and decrease the stat here.

[daanx]

Ha, interesting -- looks like I decreased the commit while it should have been increased since _mi_os_free decreases by the full amount. Let me think a bit more on this but I think you are right.

[gozetor]

Hello! Is there a reason why this PR can't be merged? We also want to use mi_process_info, but the reported commit size is incorrect.

[daanx]

Ah, yes it is already in the latest dev/dev-slice but was added manually. I'll close this PR. There will be a fresh release v2.1.8 soon I hope.