Hi,
I am working on http://www.helenos.org/ticket/866
Looks too me like VFS crashed because of null pointer dereference on the
first line of fibril_mutex_unlock(), which is an assert.
Could an Itanium expert help me, please?
The instruction seems to be:
400000000001d240: 11 08 01 40 18 10 [MIB] ld8 r33=[r32]
looks like we are reading r32. Is that the first argument to the procedure?
To continue I would like to know the address of the calling function. Stack
tracing is not implemented on ia64. I looked into the Itanium Software
convetions and I am confused.. it kind of says it's up to the OS? And
nothing in the ABI processor supplement. Any suggestions on how to actually
do it?
Or other suggestions?
Thanks,
Jiri
---------- Původní e-mail ----------
Od: HelenOS <[email protected]>
Kopie: [email protected]
Datum: 19. 3. 2024 15:36:09
Předmět: Re: [HelenOS-tickets] [HelenOS] #866: console input freezes on ia
64/ski after GCC upgrade
"#866: console input freezes on ia64/ski after GCC upgrade
-----------------------------------+-----------------------
Reporter: Jiří Zárevúcky | Owner: (none)
Type: defect | Status: new
Priority: major | Milestone: 0.14.1
Component: helenos/kernel/ia64 | Version: mainline
Resolution: | Keywords:
Blocker for: | Depends on:
See also: |
-----------------------------------+-----------------------
Comment (by Jiri Svoboda):
I think it's crashing here:
{{{
static void _fibril_mutex_unlock_unsafe(fibril_mutex_t *fm)
{
assert(fm->oi.owned_by == (fibril_t *) fibril_get_id()); <---
NULL pointer dereference??
if (fm->counter++ < 0) {
awaiter_t *wdp = list_pop(&fm->waiters, awaiter_t, link);
assert(wdp);
fibril_t *f = (fibril_t *) wdp->fid;
fm->oi.owned_by = f;
f->waits_for = NULL;
fibril_notify(&wdp->event);
} else {
fm->oi.owned_by = NULL;
}
}
}}}
--
Ticket URL: <http://www.helenos.org/ticket/866#comment:6>
HelenOS <http://www.helenos.org/>
HelenOS Operating System
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