Opened 13 years ago

Closed 12 years ago

#1626 closed bug (fixed)

GLTeapot doesn't quit

Reported by: vzsolt Owned by: axeld
Priority: normal Milestone: R1
Component: Kits/OpenGL Kit Version: R1/pre-alpha1
Keywords: Cc:
Blocked By: Blocking:
Platform: All


I was trying out the demos in hrev22928, in VMWare, and found that GLTeapot doesn't quit, neither when closing it's window, nor when using the keyboard shortcut. It hangs in Deskbar, with no windows, and can't be closed from there either.

On shutdown, the Shutdown Status dialog asks this question: "The application "GLTeapot" might be blocked on a modal panel." Kill/Cancel

In terminal, ps shows two entries related to GLTeapot, with semaphores GLTeapot, and thread_99_retcode_sem. (I'm not sure how to interpret this...)

And I can't start it again.

Attachments (1)

bt.PNG (44.1 KB ) - added by jackburton 12 years ago.

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Change History (7)

comment:1 by phoudoin, 13 years ago

Owner: changed from axeld to phoudoin

comment:2 by jackburton, 12 years ago

This doesn't happen every time, though.

comment:3 by jackburton, 12 years ago

I tried to drop the window thread into the debugger after it's stuck (exiting via ALT-W). Here's the backtrace.

by jackburton, 12 years ago

Attachment: bt.PNG added

comment:4 by jackburton, 12 years ago

So, what's happening is that the BWindow thread tries to acquire the window's lock, but it's already acquired by the BApplication (inside WindowQuitLoop()), so there's a deadlock. Maybe we have to review our quitting path again ?

comment:5 by axeld, 12 years ago

Component: - ApplicationsKits/OpenGL Kit
Owner: changed from phoudoin to axeld
Status: newassigned

comment:6 by axeld, 12 years ago

Resolution: fixed
Status: assignedclosed

What actually happened was that the "simon" thread would not always release the window lock it locked when it called the ObjectView's DrawFrame() method. It wouldn't release it because the GLRenderer is already removed after DetachFromWindow() has been called.

Fixed in hrev23691.

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