Gaulish Gaming Banquet: general

baku69

oof

schmeling65

<- still on 23H2

schmeling65

only 24H2 recieves this update. but still: Adrien and Heso should both be able to guide you through it. Usually you just say the debugger "hey, start this file, attach yourself to it" and the rest should go on its own. And because it crashes right at the start, it should come to a break very quickly and then you should be able to trace down the place which actually check why there is an Access Violation.

adrientd

So according to this report, the game crashed at file offset 0x1F3EAC, and you have to add 0x400000 to get the memory address of 0x5F3EAC In IDA it looks like this (highlightned light is where it crashed)

adrientd

And indeed it looks like it's trying to call QueryInterface on a COM object, could be DirectSound

adrientd

This is the GUID passed

adrientd

and found it

schmeling65

well, told you. Something got found by *someone* xD So it is a function called `IID_DirectSoundFXI3DL2Reverb` That is causing problems.

baku69

So how we can fix it now ?

adrientd

It's not a function, it's an ID to a COM interface

adrientd

What I've found so far is that the game crashes while trying to get a reverb effect interface from a sound buffer (I guess). But the pointer to the sound buffer is null or invalid.

schmeling65

most likely invalid. So now we need to know why the pointer is invalid

adrientd

An interesting thing is that in the DirectX documentation, it says that to get an access to IDirectSoundFXI3DL2Reverb, you have to call a method named `GetObjectInPath`, but the game uses QueryInterface instead... Probably not the actual issue, but why? :FrogThinking:

schmeling65

that's different. There is an 8 at the end

adrientd

The same

schmeling65

oh welp xD

schmeling65

is that actually a struct?

adrientd

It's a COM interface.

adrientd

It's like a class with only virtual methods defined.

schmeling65

like these? ``` pub unsafe fn SetAllParameters( &self, pcdsfxi3dl2reverb: *const DSFXI3DL2Reverb, ) -> Result<()> pub unsafe fn GetAllParameters( &self, pdsfxi3dl2reverb: *mut DSFXI3DL2Reverb, ) -> Result<()> pub unsafe fn SetPreset(&self, dwpreset: u32) -> Result<()> pub unsafe fn GetPreset(&self) -> Result pub unsafe fn SetQuality(&self, lquality: i32) -> Result<()> pub unsafe fn GetQuality(&self) -> Result ```

#general