[Bug 48291] Detroit: Become Human crashes on launch

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48291

--- Comment #43 from qsniyg <qsniyg at mail.com> ---
(In reply to Zebediah Figura from comment #42)
> Partly as stated above

Ah my apologies, for some reason I forgot to ctrl+f before asking haha

> Solving this in
> a non-generic fashion isn't pretty and probably isn't sustainable either;
> solving it in a generic fashion would mean trapping *every* syscall before
> using heuristics to determine whose it is, which is of course a big
> performance problem. The fact that seccomp can't be removed once applied
> rules out the approach of turning it off whenever we exit PE code, and even
> if we could that would require a syscall at every transition.

Right, for some reason it eluded me that seccomp would also affect wine's
syscalls haha. Turning it off and on would also likely incur a performance cost
as well.

I guess an experiment could be to replace all IPC with syscalls (possibly
through an inline function or macro, so as to allow an IPC fallback without a
ton of #ifdefs), so the PE'd process would never actually run any posix
functions. It would be interesting to see what the performance implications
are.

Obviously quite a few components of wine would have to be rewritten to allow
for this (shell32 comes to mind).

If I have time, I'll try taking a crack at this myself, but I think this will
have to be more than just a one person job, as quite a lot of code would have
to be rewritten for this.

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