[Bug 37669] Resetting a write watch can cause memory access violation in kernel

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=37669

--- Comment #27 from Sebastian Lackner <sebastian at fds-team.de> ---
Created attachment 50695
  --> https://bugs.winehq.org/attachment.cgi?id=50695
ntdll: Try to handle write-watches while we're on the signal stack.

Does the attached patch help (in addition to all the previous stuff, I hope it
still applies ^^)? It should theoretically solve the problem, but I am not
really glad yet about the way it is implemented. We can handle write-watches,
but we still can't properly use __TRY/__EXCEPT blocks in APCs. Implementing all
this properly would be much more complicated... :/

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