First post, apologies for any breaches of netiquette.
Searched the archives as best I could, can't see anything directly
relevant (but my archive-searching abilities are notoriously poor.)
Trying to compile Apache 1.3.41 + various modules. on SPARC Solaris 8, gcc
3.4.2. Compiles ok, but it crashes on startup. (Or at least it did for
quite a lot of attempts, although it now seems to survive.)
I'll leave out the diagnostics for the moment, but if anyone wants them I
can try to dredge up what I've kept. Suffice it to say, my thrashing about
in the code led me to the following in main/http_main.c, lines 4026-4033
> static listen_rec *old_listeners;
>
> /* unfortunately copy_listeners may be called before listeners is a ring */
> static void copy_listeners(pool *p)
> {
> listen_rec *lr;
>
> ap_assert(old_listeners == NULL);
It concerns me that old_listeners is uninitialized. So much so that I made
the following change:-
$ diff src/main/http_main.c.orig src/main/http_main.c
4026c4026
< static listen_rec *old_listeners;
---
> static listen_rec *old_listeners = (listen_rec *)0x12345;
(i.e. give it a completely(?) duff value), and I can now consistently get
[Mon Jun 9 12:34:29 2008] file http_main.c, line 4033, assertion
"old_listeners == NULL" failed
in the error_log. (The initial crashes weren't giving me that; OTOH they
weren't giving me the SIGABRT that ap_assert should lead to either, but a
'SIGBUS BUS_ADRALN; go figure)
So - the fix seems simple ...
$ diff src/main/http_main.c.orig src/main/http_main.c
4026c4026
< static listen_rec *old_listeners;
---
> static listen_rec *old_listeners = NULL;
and I haven't been able to break it since (admittedly with limited
testing) ... BUT BUT BUT .... this particular bit of code looks really old
- can I really be the first person ever to hit this? OK, there's a fair
chance that uninitialized data gets set to zero, but no-one? ever?
Please feel free to point out where I am being an idiot.
TIA,
Richard
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