Notes |
(0000132)
aurel
04-06-05 16:04
|
Sorry but I've done my x86 tests a bit too quickly. In fact I have exactly the
same problem on x86, so it's not related to ppc at all. |
| |
(0000134)
jocke
04-06-05 23:53
|
I suppose the crash(SEGV?) happens at exit()?
Please compile ldso with debugging support and set env. variable
LD_DEBUG=1 while executing alsa. Post the debug output. Run ldso unpatched
and with your patch. |
| |
(0000136)
aurel
04-07-05 09:30
|
No, the bug don't happens at exit() ! It happens during mplayer
initialisation.
Here are the full logs of a crashing session, and a working session
using my patch. I also included a diff between the 2 logs.
It seems that the first "Trying to dlopen '/usr/lib/libasound.so.2'"
behave exactly the same, but second and third dlopen of libasound
behave differently.
Do you need any more output ? |
| |
(0000137)
jocke
04-07-05 15:52
|
Let me check if I got this right:
mplayer depends on libasound so it gets loaded by ldso.
Some dlopens.
Then mplayer executes a sh script which in turn executes test after
which mplayer dlopens libasound even though libasound already
got loaded by ldso at startup?
Seems a bit stupid to dlopen libasound when mplayer already
depends on it, but it should work.
If the above is true, I think I know what the problem is and libdl
needs to be fixed |
| |
(0000138)
aurel
04-09-05 13:03
|
No that's not exactly true, but the idea is quite the same.
mplayer depends on libasound, so it gets loaded by ldso.
Then, mplayer DON'T load any sh script ;-)
Then mplayer call some functions from libasound. Some of
thoses functions in libasound itself are then trying to
dlopen libasound. Yes libasound try to dlopen itself !
I find this quite stupid, but that's the way it works.
So your guess about the problem is probably right. It's
probably due to libasound being dlopened after having been
loaded by ldso. |
| |
(0000139)
jocke
04-10-05 02:45
|
OK, my guess is still valid then, good. Just for the record, the problem is
in libdl, adding a _dl_fini() to ldso just exposed the bug. Your patch
restoring the old behaviour works around the bug in libdl. Fixing libdl
will take some effort and I don't have much time the next 2 weeks as my company
has merged with another company and they are moving into our site next week. |
| |
(0000140)
jocke
04-11-05 04:44
|
Could you try the libdl_1.patch(against curren SVN)? I just added?
I think this will solve you problem, but there are still a few issues
I want to fix before commiting anaything. |
| |
(0000141)
aurel
04-11-05 06:48
|
libdl_1.patch fixes the bug perfectly !
Nice work. Thank you very much. |
| |
01_ppc_ldso_fix.diff [^] (1,515 bytes) 04-06-05 15:37
crashing.log [^] (23,565 bytes) 04-07-05 09:29
