524203 - Firefox hangs on shutdown, consuming 100% CPU

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Robert Clark]

User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; en-US) AppleWebKit/532.3 (KHTML, like Gecko) Chrome/4.0.224.2 Safari/532.3
Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.3) Gecko/20091013 Gentoo Firefox/3.5.3

Every time I shut down Firefox, the main window is closed, but the
the process immediately starts consuming 100% CPU and must be killed
manually.

Reproducible: Always

Steps to Reproduce:
1. Start firefox in safe mode (/usr/bin/firefox -safe-mode)
2. As soon as the home page has loaded, exit firefox



I was not able to attach a debugger to the process, but I was able 
to strace it. These are the (edited) results:

[ .. trimmed .. ]

1024  close(3)                          = 0
1024  socket(PF_FILE, SOCK_STREAM, 0)   = 3
1024  connect(3, {sa_family=AF_FILE, path=@"/tmp/.X11-unix/X0"...}, 20) = 0
1024  getpeername(3, {sa_family=AF_FILE, path=@"/tmp/.X11-unix/X0\377\177"...}, [20]) = 0

[ .. trimmed normal system calls .. ]

1024  read(3, "\1\1\275.\0\0\0\0\31\0\200\2\0\0\0\0\320-\244\3\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 32
1024  read(3, 0x7ff03788f074, 4096)     = -1 EAGAIN (Resource temporarily unavailable)
1024  close(3)                          = 0
1024  close(27)                         = 0
1024  poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLNVAL}])
1024  poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLNVAL}])
1024  poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLNVAL}])
1024  poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLNVAL}])

[ .. the poll() system call repeat indefinitely, in a very tight loop ..]

1024  --- SIGINT (Interrupt) @ 0 (0) ---
1024  rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7ff0387f6a10}, NULL, 8) = 0
1024  rt_sigprocmask(SIG_UNBLOCK, [INT], NULL, 8) = 0
1024  tgkill(1024, 1024, SIGINT)        = 0
1024  --- SIGINT (Interrupt) @ 0 (0) ---
1024  +++ killed by SIGINT +++

Comment 1

[Robert Clark]

I should mention that this is with the Gentoo x86_64 version of 
Firefox, compiled from source. If that is a problem, please let 
me know and I'll try and reproduce this with a downloaded, 
pre-compiled version.

Comment 2

[Andreas]

I have the same symptoms on my system here.

OS: Win XP, current patch level

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)

I'll try to get a stacktryce for it and post it.

Comment 3

[Wayne Mery (:wsmwk)]

do you also see this started in safe mode?
 https://support.mozilla.com/kb/Safe+Mode
with trunk build?

Comment 4

[Wayne Mery (:wsmwk)]

robert, can you reproduce with 4.0 beta?
(I see now that you tried safe mode.)

Comment 5

[Wayne Mery (:wsmwk)]

If you can reproduce with 4.0 or newer, please reopen the bug