[pulseaudio-discuss] [PATCH 4/4] Profiles can have sink and source ports, and announce that through the API.

Colin Guthrie gmane at colin.guthr.ie
Thu Aug 11 04:42:07 PDT 2011

'Twas brillig, and Lu Guanqun at 08/08/11 14:14 did gyre and gimble:
> What's the symptom of your breaking?
> I'm not sure whether they fall into the same category but I'd like to
> point this out.  I met with some weird issues when I add some new fields
> in `struct userdata` in alsa-sink.c, the problem is the module segfaults
> when it runs to pa_alsa_refcnt_inc().
> From gdb output message, it seems the module loading mechanism forgot to
> add some kind of base address to it. so it directly jumps to a smaller
> address, which causes the seg fault.

This is a different issue, as userdata inside PA modules are internal
and private. The stuff David refers to is related to a public API which
means clients have linked against things already which can cause
problems when we change it. I think case we found the issue to do an
oversight in the API design which means we cannot correct this without
breaking ABI :(

As for your crash, I don't know, but you should be able to mess with
userdata quite happily provided you recompile everything that needs it.
Dunno why it would cause problems.



Colin Guthrie

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