Re: [RELENG_5 panic] top(1)

    0n Fri, Jan 28, 2005 at 10:02:18AM +0000, Robert Watson wrote: 

    >
    >On Fri, 28 Jan 2005, Wilkinson, Alex wrote:
    >
    >> Fatal trap 12: page fault while in kernel mode
    >> fault virtual address   = 0x24
    >> fault code              = supervisor read, page not present
    >> instruction pointer     = 0x8:0xc05238d9
    >> stack pointer           = 0x10:0xe8745b2c
    >> frame pointer           = 0x10:0xe8745b60
    >> code segment            = base 0x0, limit 0xfffff, type 0x1b
    >>                         = DPL 0, pres 1, def32 1, gran 1
    >> processor eflags        = resume, IOPL = 0
    >> current process         = 1575 (top)
    >> [thread pid 1575 tid 100176 ]
    >> Stopped at      turnstile_wait+0x269:   movl    0x24(%eax),%eax
    >> 
    >> db> tr
    >> Tracing pid 1575 tid 100176 td 0xc32ef960
    >> turnstile_wait(c2964640,c32ec77c,c32ef640,c2964640,c30e1a00) at
    >> turnstile_wait+0
    >> x269
    >> _mtx_lock_sleep(c32ec77c,c32ef960,0,0,0) at _mtx_lock_sleep+0x81
    >> sysctl_kern_proc(c06d1860,0,0,e8745c04,e8745c04) at
    >> sysctl_kern_proc+0x3ab
    >
    >If you have a kernel with debugging symbols, could you convert
    >sysctl_kern_proc+0x3ab to a line number?  Thanks!

# kgdb kernel.debug /export/bad_kernels/20050128/vmcore.3
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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This GDB was configured as "i386-marcel-freebsd".
doadump () at pcpu.h:159
(kgdb) l *sysctl_kern_proc+0x3ab
0xc04f7963 is in sysctl_kern_proc (/usr/src/sys/kern/kern_proc.c:965).
960                             if (p->p_state == PRS_NEW) {
961                                     mtx_unlock_spin(&sched_lock);
962                                     continue;
963                             }
964                             mtx_unlock_spin(&sched_lock);
965                             PROC_LOCK(p);
966                             /*
967                              * Show a user only appropriate processes.
968                              */
969                             if (p_cansee(curthread, p)) {
(kgdb)