Bug#401995: iceape: hangs on modal dialogs and message boxes

[Wladimir Mutel]

On Tue, Jan 16, 2007 at 08:04:09PM +0100, Mike Hommey wrote:

> > 	Could you propose any guesses ?

> Unfortunatelly, there's nothing informative enough to do any guess :(

> Could you try to run iceape normally and attach gdb to its pid when it
> hangs ?

	I had done exactly that. Run iceape, then attached gdb to
	iceape-bin process, and very soon it hung. 
	Backtrace was even less helpful (thread apply all bt) :

Thread 32 (Thread -1269912656 (LWP 15527)):
#0  0xb7fbf410 in ?? ()
#1  0xb44ea058 in ?? ()
#2  0x00000001 in ?? ()
#3  0x00000000 in ?? ()

Thread 31 (Thread -1291469904 (LWP 15524)):
#0  0xb7fbf410 in ?? ()
#1  0xb305abc8 in ?? ()
#2  0x00000007 in ?? ()
#3  0x00000000 in ?? ()

Thread 30 (Thread -1281279056 (LWP 15523)):
#0  0xb7fbf410 in ?? ()
#1  0xb3a1336c in ?? ()
#2  0x000025a5 in ?? ()
#3  0x00000000 in ?? ()

Thread 28 (Thread -1314915408 (LWP 15521)):
#0  0xb7fbf410 in ?? ()
#1  0xb19ff36c in ?? ()
#2  0x000025e1 in ?? ()
#3  0x00000000 in ?? ()

Thread 22 (Thread -1305085008 (LWP 15384)):
#0  0xb7fbf410 in ?? ()
#1  0xb235ef68 in ?? ()
#2  0x00000071 in ?? ()
#3  0x00000000 in ?? ()

Thread 4 (Thread -1225167952 (LWP 14026)):
#0  0xb7fbf410 in ?? ()
#1  0xb6f95ce8 in ?? ()
#2  0x00000001 in ?? ()
#3  0x00000000 in ?? ()

Thread 2 (Thread -1256887376 (LWP 14028)):
#0  0xb7fbf410 in ?? ()
#1  0xb51563e8 in ?? ()
#2  0x001a305b in ?? ()
#3  0x00000000 in ?? ()

Thread 1 (Thread -1220061504 (LWP 14018)):
#0  0xb7fbf410 in ?? ()
#1  0xbfc1c81c in ?? ()
#2  0x00000011 in ?? ()
#3  0x00000000 in ?? ()

	strace shows futex syscall in progress, as usual.

	Is something wrong with my system ?
	Nobody other seems to report this behaviour...

	Other software runs on my system pretty well,
	except 'trafshow' program from 'netdiag' package which sometimes
	(quite often) hangs with similar symptoms. I think this is
	related to async DNS resolving done inside it (with -n, it does 
	not hang ever). May be some userspace data representing futex
	are corrupted that causes the syscall hang ?