From: boozer asm <asmboozer@gmail.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org
Subject: Re: memory leak in mix/pcm_upmix.c mix/pcm_downmix.c!!!
Date: Wed, 30 Aug 2017 16:28:35 +0800 [thread overview]
Message-ID: <CAOccgsWgrC65LapcMmBmzNjgNup=z5QXP+=SR3sieYkac26zrQ@mail.gmail.com> (raw)
In-Reply-To: <s5hlgm179ld.wl-tiwai@suse.de>
not sure what's the best place to call free.
1.
static int snd_pcm_extplug_close(snd_pcm_t *pcm)
{
extplug_priv_t *ext = pcm->private_data;
snd_pcm_close(ext->plug.gen.slave);
clear_ext_params(ext);
if (ext->data->callback->close)
{
ext->data->callback->close(ext->data);
}
if (ext->data)
free(ext->data);
free(ext);
return 0;
}
2.
366 static int upmix_close(snd_pcm_extplug_t *ext)
367 {
368 snd_pcm_upmix_t *mix = (snd_pcm_upmix_t *)ext;
369 free(mix->delayline[0]);
370 free(mix->delayline[1]);
free(mix);
371 return 0;
372 }
3. apply method in alsa-plugins/maemo/alsa-dsp.c:748:static void
alsa_dsp_descructor(void) __attribute__ ((destructor));
with each methods, there are some plugins pcm_ files affected.
2017-08-30 16:17 GMT+08:00 Takashi Iwai <tiwai@suse.de>:
> On Wed, 30 Aug 2017 09:59:59 +0200,
> boozer asm wrote:
> >
> > Hi Takashi,
> >
> > i think mix is same as ext->data instead ext. ext is of extplug_priv_t *;
> > so it is definitely not mix which is of snd_pcm_upmix_t
> >
> > 33 struct snd_pcm_upmix {
> > 34 snd_pcm_extplug_t ext;
> >
> > typedef struct snd_pcm_extplug_priv {
> > snd_pcm_plugin_t plug;
> > snd_pcm_extplug_t *data;
> > between upmix and extplug_priv, there is a gap plug, which forbid ext to
> be
> > converted to mix directly.
> > so free(ext) in snd_pcm_extplug_close does NOT promise it will free mix
> too.
>
> OK, then care to submit patches?
>
>
> thanks,
>
> Takashi
>
next prev parent reply other threads:[~2017-08-30 8:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-30 5:51 memory leak in mix/pcm_upmix.c mix/pcm_downmix.c!!! boozer asm
2017-08-30 5:55 ` boozer asm
2017-08-30 7:02 ` Takashi Iwai
2017-08-30 7:59 ` boozer asm
2017-08-30 8:17 ` Takashi Iwai
2017-08-30 8:28 ` boozer asm [this message]
2017-08-30 8:32 ` Takashi Iwai
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