Re: Unstable VFS in CS2.0

Eunsoo (touko), is currently working on vfs and has noticed some
issues with memory management so memory overwriting is well possible.
Weird things seems to happen also in other platforms like arm
regarding threads. So yes what you are experiencing is well possible.
You could try running a debugger/valgrind to try to figure out helpful
elements.

2012/8/8 Jorrit Tyberghein <[email protected]>:
> That's indeed weird. To me it sounds like memory is being
> corrupted/overwritten. Are you
> on linux? Then you could use valgrind to test for this. On windows there
> might be equivalent
> memory checking tools.
>
> Other then that I have no idea.
>
> One question though. Why are you using bullet directly? Why not use the CS
> bullet plugin?
>
> Greetings,
>
> On Wed, Aug 8, 2012 at 11:01 AM, Joshua Tan Tang Sheng (IHPC)
> <[email protected]> wrote:
>>
>> Hi,
>>
>>
>>
>> I have a perplexing problem with what appears to be an incorrectly
>> functioning vfs on runtime. But first off, here’re the links to my code:
>>
>>
>>
>> Header file http://pastebin.ca/2178376
>>
>> Cpp file http://pastebin.ca/2178377
>>
>>
>>
>> This is simply a modified appsimple1 where I try to use the bullet engine
>> directly. It works fine until I introduce a pointer to an int on line 90 of
>> the header file. Note that I never actually use it; I just declare it. Once
>> it is introduced, the system is somehow unable to load textures from the
>> VFS: it claims that it can't find the files in the VFS. canvas.openglcommon
>> also claims it can't open the driver database file, and the engine can't
>> load the shaders. They all print error messages stating that they can't find
>> or can't open the files, or that the files are not available.
>>
>>
>>
>> It doesn't matter which pointer type I use, int*, float*, etc all produce
>> the same error. What's even more interesting is this:
>>
>> You will see that on line 60 of the  header file i have declared a
>> csRef<iVFS>; if I uncomment that, i.e. both declarations of csRef<iVFS> and
>> float* are in effect, then I don't get this problem. But, if I only have one
>> of the declarations in effect, then the problem arises.
>>
>>
>>
>> I initially thought it was some low level memory problem. However, I tried
>> compiling and running the code on a different machine and experienced a
>> different problem. This time, I am unable to reproduce the bug consistently:
>> sometimes the code works with just the single int*, sometimes it doesn’t
>> work even with both the csRef and int* enabled. Sometimes, the code will
>> refuse to work, and if I quit and restart, it works fine. (Note that when I
>> say “refuse to work” I’m referring to the abovementioned VFS problem.) This
>> seems to indicate some sort of threading problem.
>>
>>
>>
>> Does anyone have any ideas on what is going on?
>>
>>
>> IHPC Values :: Impact :: Honesty :: Performance :: Co-operation
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>
>
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Exclusive live event will cover all the ways today's security and 
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/