[vlc-devel] Memory corruption in playlist handling

[Pierre d'Herbemont]

Hello Olivier,

The media_* is not really over, but, weirdly enough, it shouldn't be directly
responsible for this, as these function doesn't use media_instance nor
media_descriptor. I really tend to think that the guilty code is in the input
event code, which was newly added by me. (It listens to new input event, thus
everything could goes wrong from here).

I'll have a look tonight.

Thanks for pointing this out,

Pierre.

Selon Olivier Aubert <olivier.aubert at liris.cnrs.fr>:

> Hello
>
> I do not know if the transition to mediainstance* objects is over by
> now, but it seems to have triggered a memory corruption somewhere, which
> can be triggered notably through the mediacontrol API:
>
> > import vlc
>
> > mc=vlc.MediaControl('--plugin-path /home/oaubert/src/vlc-test'.split() )
> # Harmless warning:
> [00000297] main playlist error: Reloading playlist not implemented.
>
> > mc.playlist_add_item('/tmp/k.mpg')
>
> > mc.playlist_get_list()
> ['/tmp/k.mpg']
>
> > mc.start(0)
> [00000304] access_directory access error: : No such file or directory
> [00000304] access_file access error: cannot open file  (No such file or
> directory)
> [00000302] main input error: open of `PüPüpg' failed: could not create
> access: no suitable access2 module
>                                      ^^^^^^^^
>
> > mc.playlist_get_list()
> ['dead input']
>
> # And another try to start the movie definitely corrupts memory:
> > mc.start(0)
> [00000297] main playlist error: thread -1210119984: mutex_lock failed at
> ../../vlc-trunk/src/input/item.c:101 (22:Invalid argument)
> [00000297] main playlist error: thread -1210119984: mutex_unlock failed at
> ../../vlc-trunk/src/input/item.c:104 (22:Invalid argument)
>
> AFAIK, the python bindings or mediacontrol is not in cause here, since
> the playlist content is correct and the start method merely calls
> playlist_Play.
>
> Is anyone investigating this ?
>
> Olivier
>
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