aac.gdb gdb debug script
define aacqinfo
set $sc=(struct aac_softc*)$arg0
set $qstat=$sc->aac_qstat
printf "Queue stats\n"
printf "#\tName\t\tLength\tMax\n"
printf "%d\tFREE\t\t%d\t%d\n", 0, $qstat[0].q_length, $qstat[0].q_max
printf "%d\tBIO\t\t%d\t%d\n", 1, $qstat[1].q_length, $qstat[1].q_max
printf "%d\tREADY\t\t%d\t%d\n", 2, $qstat[2].q_length, $qstat[2].q_max
printf "%d\tBUSY\t\t%d\t%d\n", 3, $qstat[3].q_length, $qstat[3].q_max
end
define aacq_busy
set $sc=(struct aac_softc*)$arg0
set $qentry=$sc->aac_busy.tqh_first
printf "Addr\t\tType\tDelay\n"
while ($qentry != 0)
printf "%p\t%d\t%d\n", $qentry, $qentry->cm_fib->Header.Command, time_uptime - $qentry->cm_timestamp
set $qentry=$qentry->cm_link.tqe_next
end
end- Source the aac.gdb file
(kgdb) source ~/gdb/aac.gdb
- Locate the aac0aif thread from info threads.
(kgdb) info threads
...
25 Thread 100020 (PID=24: aac0aif) sched_switch (td=0xa47f44b0,
newtd=0xa75e7640, flags=1) at atomic.h:265
...
(kgdb) thread 25
[Switching to thread 25 (Thread 100020)]#0 sched_switch (td=0xa47f44b0,
newtd=0xa75e7640, flags=1) at atomic.h:265
265 atomic.h: No such file or directory.
in atomic.h - Find the aac_softc pointer from aac_command_thread.
(kgdb) bt
#0 sched_switch (td=0xa47f44b0, newtd=0xa75e7640, flags=1) at atomic.h:265
#1 0xa05d2a46 in mi_switch (flags=1, newtd=0x0)
at /usr/src/sys/kern/kern_synch.c:338
#2 0xa05ee0e7 in sleepq_switch (wchan=0x0)
at /usr/src/sys/kern/subr_sleepqueue.c:445
#3 0xa05ee2b8 in sleepq_timedwait (wchan=0x0)
at /usr/src/sys/kern/subr_sleepqueue.c:562
#4 0xa05d2702 in msleep (ident=0xa4816c48, mtx=0xa48e0134, priority=76,
wmesg=0x0, timo=50000) at /usr/src/sys/kern/kern_synch.c:207
#5 0xa0497482 in aac_command_thread (sc=0xa48e0000)
at /usr/src/sys/dev/aac/aac.c:928
#6 0xa05aeb08 in fork_exit (callout=0xa04973de <aac_command_thread>,
arg=0x0, frame=0x0) at /usr/src/sys/kern/kern_fork.c:812
#7 0xa07a7d9c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:208
(kgdb) frame 5
#5 0xa0497482 in aac_command_thread (sc=0xa48e0000)
at /usr/src/sys/dev/aac/aac.c:928
928 /usr/src/sys/dev/aac/aac.c: No such file or directory.
in /usr/src/sys/dev/aac/aac.c
(kgdb) p sc
$8 = (struct aac_softc *) 0xa48e0000 - Run the aac.gdb commands
(kgdb) aacqinfo $sc
Queue stats
# Name Length Max
0 FREE 227 246
1 BIO 0 1
2 READY 0 1
3 BUSY 19 137
(kgdb) aacq_busy $sc
Addr Type Delay
0xa48ec040 502 25
0xa48eb900 502 25
0xa48e9a80 502 25
0xa48eb140 502 25
0xa48ec6c0 502 25
0xa48eb2c0 502 25
0xa48e9a00 502 25
0xa48e9100 502 25
0xa48e9f80 502 25
0xa48eab40 502 25
0xa48eab00 502 25
0xa48ebc00 502 25
0xa48ebfc0 502 25
0xa48eb400 502 25
0xa48e9b40 502 25
0xa48ec240 502 25
0xa48eb340 502 25
0xa48eb540 502 25
0xa48ea380 600 25
