On Mon, May 08, 2006 at 04:38:54PM +0200, Jan Willem Stumpel wrote:
> Justin Pryzby wrote:
> > On Mon, May 08, 2006 at 11:41:39AM +0200, Jan Willem Stumpel
> > wrote:
>
> >> It has always been difficult to reproduce this for purposes
> >> of bug reporting but now I found a fairly reliable way;
> >>
> >> -start Firefox.
> >> -put the cursor in the address window.
> >> -hit the "A" key, but somewhat to the left, so you also
> >> engage the CapsLock key.
> >>
> >> You will probably not have to try this more than 2 or 3 times
> >> before your system freezes completely with approx. 100% CPU
> >> usage by Firefox.
> >
> > I cannot reproduce this
>
> Aargh. I was afraid of that. I can reproduce it very reliably
> though, both in Mozilla and in Firefox. The trouble is, it also
> happens when I do not want to trigger it, but hit some key wrongly
> by accident.
>
> > but it sure sounds like #360079.
>
> Not quite the same, I think; #360079 does not mention 100% CPU.
> And "my" bug does not happen immediately when starting Firefox /
> Mozilla; it is only triggered by some keyboard event.
>
> If I try strace I get the usual incomprehensible huge file, which
> in this case seems to consist mostly of things like (forever repeated)
>
> poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=13,
> events=POLLIN|POLLPRI}, {fd=15, events=POLLIN|POLLPRI}, {fd=16,
> events=POLLIN|POLLPRI}, {fd=17, events=POLLIN|POLLPRI}, {fd=5,
> events=POLLIN, revents=POLLIN}], 7, -1) = 1
> gettimeofday({1147097643, 645052}, NULL) = 0
> read(5, "\372", 1) = 1
> ioctl(3, FIONREAD, [0]) = 0
>
> Maybe you can make sense out of this..
Could you install firefox-dbg and get a backtrace when it is in this
state? This itself will require ~128MB ram.
Justin
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