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% dbx -k ./vmunix.1 ./vmzcore.1
dbx version 5.0
Type ’help’ for help.
stopped at [boot:1494 ,0xfffffc0000442918] Source not available
(dbx) p ustsname
1
struct {
sysname = "OSF1"
nodename = "system.dec.com"
release = "V5.0"
version = "688.2"
machine = "alpha"
}
(dbx) print paniccpu
2
0
(dbx) p machine_slot[1]
3
struct {
is_cpu = 1
cpu_type = 15
cpu_subtype = 3
running = 1
cpu_ticks = {
[0] 416162
[1] 83260
[2] 1401080
[3] 11821212
[4] 1095581
}
clock_freq = 1024
error_restart = 0
cpu_panicstr = 0xfffffc000059f6a0 = "cpu_ip_intr: panic request"
cpu_panic_thread = 0xffffffff8109a780
}
(dbx) p panicstr
4
0xfffffc0000558ad0 = "simple_lock: uninitialized lock"
(dbx) tset active_threads[paniccpu]
5
stopped at [boot:1494 ,0xfffffc0000442918]
(dbx) t
6
> 0 boot(0x0, 0x4, 0xac35c0000000a, 0xfffffc00004403fc, 0xfffffc000000000e) \
["../../../../src/kernel/arch/alpha/machdep.c":1494, 0xfffffc0000442918]
1 panic(s = 0xfffffc0000558b40 = "simple_lock: hierarchy violation") ["../\
2 simple_lock_fault(slp = 0xfffffc00006292f0, state = 0, caller = 0xfffffc\
000046f384, arg = 0xfffffc0000534fd8 = "session.s_fpgrp_lock", fmt = 0xfffffc\
0000558de8 = " class already locked: %s\n", error = 0xfffffc0000558b40 = "\
simple_lock: hierarchy violation") ["../../../../src/kernel/kern/lock.c":1558\
, 0xfffffc00003c34ec]
3 simple_lock_hierarchy_violation(slp = 0xfffffc000046f384, state = 184467\
39675668500440, caller = 0xfffffc0000558de8, curhier = 5606208) ["../../../..\
/src/kernel/kern/lock.c":1616, 0xfffffc00003c3620]
4 xnaintr(0xfffffc00005a5158, 0x2, 0xffffffffb53ef238, 0xfffffc000068a754,\
0xfffffc000055891d) ["../../../../src/kernel/io/dec/netif/if_xna.c":1077, 0x\
fffffc000046f384]
5 _XentInt(0x2, 0xfffffc0000447174, 0xfffffc00005b7d40, 0x2, 0x0) ["../../\
6 swap_ipl(0x2, 0xfffffc0000447174, 0xfffffc00005b7d40, 0x2, 0x0) ["../../\
7 boot(0x0, 0x0, 0xffffffffa52c6000, 0xffffffffb53ef1f8, 0xfffffc00003bf4f\
c) ["../../../../src/kernel/arch/alpha/machdep.c":1434, 0xfffffc000044280c]
8 panic(s = 0xfffffc0000558ad0 = "simple_lock: uninitialized lock") ["../.\
9 simple_lock_fault(slp = 0xffffffffa52c6000, state = 1719, caller = 0xfff\
ffc00003734c4, arg = (nil), fmt = (nil), error = 0xfffffc0000558ad0 = "simple\
_lock: uninitialized lock") ["../../../../src/kernel/kern/lock.c":1558, 0xfff\
ffc00003c34ec]
10 simple_lock_valid_violation(slp = 0xfffffc00003734c4, state = 0, caller \
= (nil)) ["../../../../src/kernel/kern/lock.c":1584, 0xfffffc00003c3578]
4–10 Crash Analysis Examples