[PATCH] quartz: Increment reference count for the advise thread to avoid crashes caused by DLL unloading.

Zebediah Figura (she/her) zfigura at codeweavers.com
Tue Aug 10 18:56:07 CDT 2021

On 8/10/21 6:40 PM, 粟田大樹 wrote:
> Hi, Zebediah. Thank you for your quick reply.
> It was a very interesting problem and I logged the changes in object_locks.
> In my tests, object_locks goes to 0 without system_clock_inner_Release
> being called.
> The game I tested does not have a free version, so I apologize for not
> sharing it. The game is clickable to skip video playback, and the crash
> occurs when clicking.
> I have attached the log of my test for your reference. Thank you,

 From examination of the code I believe the problem is that we call 
system_clock_create() from dsound_render_create(), which bypasses the 

Either that should be changed to CoCreateInstance, or we should only 
increment object_locks from creation functions. I'm kind of leaning 
toward the latter, even though it's more code, since it's more 
consistent (along the lines of "always grab and release a resource in 
the same place").

I note also that enum_reg_filter_create() and enum_moniker_create() 
don't reference the module, and should.

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