Intermittent failures with ctrl-c
Tom Honermann
thonermann@coverity.com
Wed Jan 23 03:20:00 GMT 2013
On 01/20/2013 05:08 PM, Tom Honermann wrote:
> However, I was still able to reproduce another case. As before, one of
> the processes is being left running when the rest are terminated. The
> "abandoned" process appears to be in a live-lock state with two threads
> (threads 1 and 2) running at 100%. Of particular interest is that each
> time I press ctrl-c in the cmd.exe console this process was spawned
> from, a new thread appears in the process even though this program is no
> longer a foreground process and all other Cygwin processes have
> terminated. The new threads never exit.
I noticed that more changes were checked in that looked like they might
address this, so I tested again with the latest snapshot (20130123).
I wasn't able to reproduce any of the symptoms I previously reported. Yay!
However, just as I was about to give up testing, I hit one more new
issue. One of the ctrl-c events sent bash into what appeared to be an
infinite loop emitting error messages like these:
11408974 [unknown (0x144C)] bash 1752 exception::handle: Error while
dumping state (probably corrupted stack)
11411584 [unknown (0x144C)] bash 1752 exception::handle: Error while
dumping state (probably corrupted stack)
While this was going on, hitting ctrl-c had no discernible effect. I
resorted to killing the process via task manager.
This only occurred once, I wasn't able to get it to happen again.
Tom.
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