Date: Tue, 1 Mar 2005 10:58:16 -0800 From: Dariusz Kulinski <d.kulinski@gmail.com> To: Doug White <dwhite@gumbysoft.com>, freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3 crash (core with debug symbols available) Message-ID: <1119242149.20050301105816@takeda.tk> In-Reply-To: <20050301104030.W68845@carver.gumbysoft.com> References: <549575862.20050226230200@takeda.tk> <20050228210235.C62607@carver.gumbysoft.com> <20050301104030.W68845@carver.gumbysoft.com>
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Hello Doug,
Tuesday, March 1, 2005, 10:50:19 AM, you wrote:
>> > Looks like it ran over a spammed thread, but I'll want to see the fault
>> > address. Bets on whether its 0xdeadc0de+offset?
>> 0xdeadc0de, huh? :)
> free()d memory regions get filled with 0xdeadc0de to hunt down
> use-after-free conditions.
Ok, I thought it was one of developer jokes =)
> Thats what I want :-)
> OK, it wasn't deadc0de, so can you load the crashdump up, go down to the
> sigtd() frame, and "print *td"? It'll be a huge spew.
(kgdb) frame 20
#20 0xc04e9d3f in sigtd (p=0xc16948d4, sig=14, prop=129) at /usr/src/sys/kern/kern_sig.c:1581
1581 if (td->td_waitset != NULL &&
(kgdb) print *td
$1 = {td_proc = 0xc16948d4, td_ksegrp = 0xc26b9310, td_plist = {tqe_next = 0xc1b48190, tqe_prev = 0xc1b95198}, td_kglist = {
tqe_next = 0x0, tqe_prev = 0xc26b931c}, td_slpq = {tqe_next = 0x0, tqe_prev = 0xc1794b80}, td_lockq = {tqe_next = 0x0,
tqe_prev = 0x0}, td_runq = {tqe_next = 0x0, tqe_prev = 0xc26b9324}, td_selq = {tqh_first = 0x0, tqh_last = 0xc17c31c0},
td_sleepqueue = 0x0, td_turnstile = 0xc15d5dc0, td_tid = 100081, td_flags = 8, td_inhibitors = 6, td_pflags = 8,
td_dupfd = 0, td_wchan = 0xd12bfc20, td_wmesg = 0xc06cef0b "sigwait", td_lastcpu = 0 '\0', td_oncpu = 255 'ÿ',
td_locks = 0, td_blocked = 0x0, td_ithd = 0x0, td_lockname = 0x0, td_contested = {lh_first = 0x0}, td_sleeplocks = 0x0,
td_intr_nesting_level = 0, td_pinned = 0, td_mailbox = 0x9903010, td_ucred = 0xc2b41b00, td_standin = 0x0, td_prticks = 0,
td_upcall = 0xc17c0510, td_sticks = 2210, td_uuticks = 0, td_usticks = 0, td_intrval = 0, td_oldsigmask = {__bits = {0, 0,
0, 0}}, td_sigmask = {__bits = {159751, 0, 0, 0}}, td_siglist = {__bits = {0, 0, 0, 0}}, td_waitset = 0xd12bfc64,
td_umtx = {tqe_next = 0x0, tqe_prev = 0x0}, td_generation = 376536, td_sigstk = {ss_sp = 0x0, ss_size = 0, ss_flags = 0},
td_kflags = 0, td_xsig = 0, td_profil_addr = 0, td_profil_ticks = 0, td_base_pri = 104 'h', td_priority = 104 'h',
td_pcb = 0xd12bfda0, td_state = TDS_INHIBITED, td_retval = {0, 137620480}, td_slpcallout = {c_links = {sle = {
sle_next = 0x0}, tqe = {tqe_next = 0x0, tqe_prev = 0xc1cd68e4}}, c_time = 216540257, c_arg = 0xc17c3190, c_func = 0,
c_flags = 8}, td_frame = 0xd12bfd48, td_kstack_obj = 0xc1796318, td_kstack = 3509313536, td_kstack_pages = 2,
td_altkstack_obj = 0x0, td_altkstack = 0, td_altkstack_pages = 0, td_critnest = 1, td_md = {md_savecrit = 582},
td_sched = 0xc17c32e4}
--
Best regards,
Dariusz mailto:d.kulinski@gmail.com
http://www.takeda.tk
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