ioctl(arg) - uninitialised byte(s) in alsa lib

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From: Mathieu Monney <zittix_all@xwaves.net>
To: alsa-devel@alsa-project.org
Subject: ioctl(arg) - uninitialised byte(s) in alsa lib
Date: Wed, 12 Mar 2008 12:49:44 +0100	[thread overview]
Message-ID: <47D7C358.6050401@xwaves.net> (raw)

Hi all,

I'm currently working on a small audio stack on top of alsa and I'm 
getting some "Syscall param ioctl(arg) contains uninitialized byte(s)" 
errors when I run my program using valgrind. I don't know if it is a bug 
in my program or in alsa lib. What I'm sure is that my program is 
working even though these errors appear.

The dump:

==14279== Syscall param ioctl(arg) contains uninitialised byte(s)
==14279==    at 0x40007F2: (within /lib/ld-2.6.1.so)
==14279==    by 0x40DE911: snd_pcm_prepare (in /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40F2552: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40DE911: snd_pcm_prepare (in /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4F0C: snd_pcm_hw_params (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x80A6599: AlsaConfigureDevice (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x80A6DE3: pjmedia_snd_open (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x809EC85: start_sound_device (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x805EE1E: pjsua_set_snd_dev (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x80615AA: pjsua_media_subsys_start (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x805AAC5: pjsua_start (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==    by 0x805001B: app_main (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)
==14279==
==14279== Syscall param ioctl(arg) contains uninitialised byte(s)
==14279==    at 0x40007F2: (within /lib/ld-2.6.1.so)
==14279==    by 0x40DE911: snd_pcm_prepare (in /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4F0C: snd_pcm_hw_params (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x411C213: snd_pcm_direct_initialize_slave (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4115DFB: snd_pcm_dmix_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4116286: _snd_pcm_dmix_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4384: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4A82: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4AF2: snd_pcm_open_slave (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4100CEF: _snd_pcm_plug_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4384: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4A82: (within /usr/lib/libasound.so.2.0.0)
==14279==
==14279== Syscall param ioctl(arg) contains uninitialised byte(s)
==14279==    at 0x40007F2: (within /lib/ld-2.6.1.so)
==14279==    by 0x40DE7D1: snd_pcm_start (in /usr/lib/libasound.so.2.0.0)
==14279==    by 0x411C5DF: snd_pcm_direct_initialize_slave (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4115DFB: snd_pcm_dmix_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4116286: _snd_pcm_dmix_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4384: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4A82: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4AF2: snd_pcm_open_slave (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x4100CEF: _snd_pcm_plug_open (in 
/usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4384: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x40E4A82: (within /usr/lib/libasound.so.2.0.0)
==14279==    by 0x80A6E1B: pjmedia_snd_open (in 
/home/mathieu/BProject/WiFi-VoIP/pjsip/pjsip_host_x86/pjsip-apps/bin/pjsua-i686-pc-linux-gnu)

Thank you,

Mathieu Monney

next             reply	other threads:[~2008-03-12 11:49 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-12 11:49 Mathieu Monney [this message]
2008-03-12 12:15 ` ioctl(arg) - uninitialised byte(s) in alsa lib Clemens Ladisch

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