Date: Mon, 1 Apr 1996 13:35:06 -0500 (EST) From: "Marc G. Fournier" <scrappy@ki.net> To: current@freebsd.org Subject: Finally...a core dump that works -- ed_start() bug Message-ID: <Pine.BSI.3.92.960401132942.251E-100000@ki.net>
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Hi...
Well, after I don't know *how* many attempts to get a core dump
from the ed_start() panic...I've got one.
Now what do I do? :)
I've checked the handbook, and followed the steps given for
analysing the core, and came up with this. I've moved my core/kernel.debug
to a seperate place so that I don't delete it accidentally, so if there is
another command I should use to give better output, or if I've totally
confused what I'm looking at, please let me know...this bug is about the
only bug that I'm getting with -current right now, and would really love to
see higher then 24hr uptimes on that machine :(
BTW...since I already have a PR submitted for this, but not this
information, is there a way of appending this onto the existing PR?
Script started on Mon Apr 1 13:22:43 1996
freebsd# gdb -k /usr/src/sys/compile/freebsd/kernel.debug vmcore.4
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.13 (i386-unknown-freebsd),
Copyright 1994 Free Software Foundation, Inc...
IdlePTD 20d000
current pcb at 1dae20
panic: from debugger
#0 boot (howto=260) at ../../i386/i386/machdep.c:942
942 dumppcb.pcb_ptd = rcr3();
(kgdb) where
#0 boot (howto=260) at ../../i386/i386/machdep.c:942
#1 0xf0113707 in panic (fmt=0xf01011f8 "from debugger")
at ../../kern/subr_prf.c:133
#2 0xf0101215 in db_panic (dummy1=-266744989, dummy2=0, dummy3=-1,
dummy4=0xf01c9aac "") at ../../ddb/db_command.c:395
#3 0xf01010fe in db_command (last_cmdp=0xf01cab34, cmd_table=0xf01ca994)
at ../../ddb/db_command.c:288
#4 0xf010127d in db_command_loop () at ../../ddb/db_command.c:417
#5 0xf01035e8 in db_trap (type=3, code=0) at ../../ddb/db_trap.c:73
#6 0xf019c93a in kdb_trap (type=3, code=0, regs=0xf01c9ba8)
at ../../i386/i386/db_interface.c:136
#7 0xf01a48ec in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = -266556620,
tf_esi = -267382280, tf_ebp = -266560532, tf_isp = -266560560,
tf_ebx = 256, tf_edx = -266745035, tf_ecx = 1920, tf_eax = 18,
tf_trapno = 3, tf_err = 0, tf_eip = -266744989, tf_cs = -266600440,
tf_eflags = 582, tf_esp = -266745051, tf_ss = -267307362})
at ../../i386/i386/trap.c:399
#8 0xf019d1b1 in calltrap ()
#9 0xf01136fe in panic (fmt=0xf01011f8 "from debugger")
at ../../kern/subr_prf.c:129
#10 0xf0101215 in db_panic (dummy1=-266652479, dummy2=0, dummy3=-1,
dummy4=0xf01c9c3c "") at ../../ddb/db_command.c:395
#11 0xf01010fe in db_command (last_cmdp=0xf01cab34, cmd_table=0xf01ca994)
at ../../ddb/db_command.c:288
#12 0xf010127d in db_command_loop () at ../../ddb/db_command.c:417
#13 0xf01035e8 in db_trap (type=12, code=0) at ../../ddb/db_trap.c:73
#14 0xf019c93a in kdb_trap (type=12, code=0, regs=0xf01c9d8c)
at ../../i386/i386/db_interface.c:136
#15 0xf01a50af in trap_fatal (frame=0xf01c9d8c) at ../../i386/i386/trap.c:736
#16 0xf01a4bac in trap_pfault (frame=0xf01c9d8c, usermode=0)
at ../../i386/i386/trap.c:651
#17 0xf01a483f in trap (frame={tf_es = -267190256, tf_ds = -266534896,
tf_edi = -267583428, tf_esi = -266477172, tf_ebp = -266560020,
tf_isp = -266560076, tf_ebx = 656, tf_edx = 662, tf_ecx = 662,
tf_eax = -267583488, tf_trapno = 12, tf_err = -266665984,
tf_eip = -266652479, tf_cs = -267583480, tf_eflags = 66134,
tf_esp = -1073610752, tf_ss = -258322176}) at ../../i386/i386/trap.c:319
#18 0xf019d1b1 in calltrap ()
#19 0xf01387d5 in ether_output (ifp=0xf01de18c, m0=0xf09a5100, dst=0xf09c5d70,
rt0=0xf099ab00) at ../../net/if_ethersubr.c:307
#20 0xf0141ee1 in ip_output (m0=0xf09a5100, opt=0x0, ro=0xf09b5d2c, flags=0,
imo=0x0) at ../../netinet/ip_output.c:355
#21 0xf0145e4d in tcp_output (tp=0xf094c900) at ../../netinet/tcp_output.c:689
#22 0xf0144cb2 in tcp_input (m=0xf09bf380, iphlen=20)
at ../../netinet/tcp_input.c:1625
#23 0xf0140bdd in ip_input (m=0xf09bf380) at ../../netinet/ip_input.c:447
#24 0xf0140c54 in ipintr () at ../../netinet/ip_input.c:468
(kgdb) up 19
#19 0xf01387d5 in ether_output (ifp=0xf01de18c, m0=0xf09a5100, dst=0xf09c5d70,
rt0=0xf099ab00) at ../../net/if_ethersubr.c:307
307 (*ifp->if_start)(ifp);
(kgdb) list
302 splx(s);
303 senderr(ENOBUFS);
304 }
305 IF_ENQUEUE(&ifp->if_snd, m);
306 if ((ifp->if_flags & IFF_OACTIVE) == 0)
307 (*ifp->if_start)(ifp);
308 splx(s);
309 ifp->if_obytes += len + sizeof (struct ether_header);
310 if (m->m_flags & M_MCAST)
311 ifp->if_omcasts++;
(kgdb) print ifp
$1 = (struct ifnet *) 0xf00d003c
(kgdb) print ifp->if_obytes
There is no member named if_obytes.
(kgdb) printf ifp->if_start
$2 = (void (*)()) 0xffffffff <end+266429799>
(kgdb) print ifp->if_flags
$3 = -1
(kgdb) print m->m_flags
There is no member named m_flags.
(kgdb) quit
freebsd# exit
exit
Script done on Mon Apr 1 13:28:33 1996
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