RE: Correction to crash inside RtlCaptureStackBackTrace() + test case

[Janne Hakonen]

Hi Alexandre Julliard,

I see you had another idea of how to correct the RtlCaptureStackBackTrace() 
function. 
I tested your implementation with Anarchy Online's item store (ingame web 
browser based on Awesomium) and with AwesomiumGL (sample app from Awesomium's 
SDK).

With AwesomiumGL I did, after a while (scrolling in an image heavy site), got 
it to crash:
wine: Unhandled page fault on read access to 0xfffffffc at address 0x7bc7586b 
(thread 002e)
To file dlls/ntdll/signal_i386.c, line 2438:
     frame = (ULONG *)*frame; (inside the skipping loop).
And, so, if 'frame' is 0xfffffffc, then the added check, unfortunately, will 
not cut it.

With Anarchy Online, I browsed quite a lot within the item store, changing 
pages, and finally 
just left the window open for ~20 minutes. No crash so far, so the correction 
might have worked for the game or then I just didn't wait long enough ;)


Should I still add the try-except blocks to RtlCaptureStackBackTrace() and 
tests for 0xfffffffc value also? 
Please advice.

Best Regards, 
Janne