Graphics Debugging - shader breakpoint => app crash

Developer Tools Nsight Visual Studio Edition
1

Hi,

I started app with Graphics Debugging, then I did Ctrl+Z and with Space I paused frame.
In Visual Studio 2012 I opened fragment shader for current draw and I set breakpoint… after 1-2 sec application crashed. My TDR is 10s, every time I start app it warning me.

When I started debugging on crash: Unhandled exception at 0x000000006E3C1D2E (nvoglv64.dll) in test.exe: 0xC0000005: Access violation reading location 0x0000000000000030.

Thanks for help!

2

Hi glararan,

Sorry about the crash, but we need some information for investigate your crash:

  • Nsight version
  • GPU, OS, driver info
  • Are you doing remote shader debug or just local shader debug? remote means two machine, local means one machine
  • Can we have your sample to do some local repro, then we can identify the crash quickly?

I just tried our local OGL samples, do shader debug smoothly on that sample.

Thanks
An

3

Hi,

  • Nsight: 4.0.0.14159
  • GPU: GeForce 650M (notebook version)
  • Driver: 335.23
  • Local debug
  • OS: Win 8.1 x64
  • Repo: there it is - but require Qt 5.2 to run
4

Hi,

I am downloading Qt 5.2, but it’s slow at my side. Could you just upload a binary which I can run quickly in my local system?

Thanks
An

5

Hi glararan,

At last I just can build your QEditor samples. Actually, I can’t pause frame, since it prompt:

glTexImage2D (Zero texture object not supported – encountered on target of GL_TEXTURE_2D)

I notice that you can do pause&capture, but this prompt msg may show some clue about your crash. I will keep investigate, just FYI.

Thanks
An

6

Hi,

Sorry I couldn’t get to computer yesterday.

Yes I can pause that frames, if would you like still my binaries I can post them.

Regards, glararan.

7

Hi glararan,

I can have repro of your issue locally, no need to post the binary.

Hard to say which part make this crash happen right now, but I will keep you in touch.

Thanks
An

8

Ok,

Thank you.

9

Hi glararan,

We have fixed the crash, next release will include that fix. Actually, we are preparing a new release right now.

Thanks
An

10

Hi,

So if I understand correct, this was not my fault in code right?

Btw. Thanks for support!!!

11

Hi,

Downloaded new version with required driver and when I set breakpoint app is currently not crashing. Thanks!

But new problem or maybe I’m doing something wrong, I pause frame, select draw action and then open tessellation evaluation shader and set breakpoint, but nothing happen then.

Thanks for response :)

12

Hi glararan,

We noticed this kind of issue some time ago, this looks like a driver related bug, we are still working on it, hope next release can solve this. I will let you know when this bug has been gone.

Thanks
An

13

Hi,

Thanks for response and for solving problem.