powerpc/133383: firefox thr_kill crash with heavy vm load

[Justin Hibbits]

>Number:         133383
>Category:       powerpc
>Synopsis:       firefox thr_kill crash with heavy vm load
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ppc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Apr 04 20:10:01 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Justin Hibbits
>Release:        8-CURRENT
>Organization:
>Environment:
FreeBSD narn.knownspace 8.0-CURRENT FreeBSD 8.0-CURRENT #14 r189096:189865M: Sun Mar 22 23:09:12 EDT 2009     root at narn.knownspace:/usr/obj/usr/src/sys/NARN powerpc

>Description:
Under heavy vm load firefox3 crashes in thr_kill.  Output of gdb where:

#0  0x23c2c238 in thr_kill () from /lib/libc.so.7
#1  0x23bbec54 in pthread_mutex_lock () from /lib/libthr.so.3
#2  0x21d2b3c8 in XRE_LockProfileDirectory () from /usr/local/lib/firefox3/libxul.so

Crash address in thr_kill is the bnslr immediately following the sc.

Hardware:  G4 1.25GHz, 1.25GB RAM

Home directory on SATA (possibly relevant).

It appears to only occur on powerpc.
>How-To-Repeat:
Start firefox, with several tabs.  Run programs that perform heavy vm load.  Firefox should crash relatively quickly.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: