Re: [Libvisual-devel] possible bug in gforce

[salsaman <sal...@xs...>]

Dennis Smit wrote:

>Hmms, 'accident' is a very simply script. Can you run LiVES from
>console and get a backtrace that way ?
>
>Thanks,
>Dennis
>
>
>On Sat, 2004-09-25 at 01:06 +0100, salsaman wrote:
>  
>
>>Hi Dennis,
>>I think there could be a bug or two in gforce. I got a hang just playing 
>>the visual, no mixing, no other clips open. This has happened a few 
>>times, but because it generally hangs my whole X server I can't get a 
>>backtrace.
>>
>>Anyway some, maybe all of these hangs appear to be connected with "New 
>>Delta Field: Accident". Maybe you could have a quick check in this 
>>module and see if there is anything suspicious.
>>
>>Cheers,
>>Salsaman.
>>
>>
>>
>>
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OK, I managed to get a backtrace this time, again we see New Delta 
Field: Accident


libvisual INFO: no progname: New Delta field: Acid_Gap
libvisual INFO: no progname: New wave shape: 3D_Cylinder
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested:
libvisual INFO: no progname: Looking up expression in dict: MAG
libvisual INFO: no progname: New Particle: Warp_Me_Away
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested: 150 + rnd( 250 )
New Delta field: Accident
libvisual INFO: no progname: New Delta field: Acid_Gap_2
libvisual INFO: no progname: New wave shape: Arena
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested: 100
libvisual INFO: no progname: Looking up expression in dict: MAG



Program received signal SIGINT, Interrupt.
0x40b82e3b in ExprVirtualMachine::Execute() (this=0x40b82f47)
    at ExprVirtualMachine.cpp:263
263                             _fetch( r1, v1 )
Current language:  auto; currently c++
(gdb) bt
#0  0x40b82e3b in ExprVirtualMachine::Execute() (this=0x40b82f47)
    at ExprVirtualMachine.cpp:263
#1  0x40b7e8f9 in WaveShape::Draw(long, PixPort&, float, WaveShape*, 
float) (
    this=0x83025c4, inNumSteps=200, inDest=@0x8301414, inFader=1,
    inWave2=0x83023bc, inMorphPct=1) at Expression.h:24
#2  0x40b7a925 in GForce::RecordSample(long) (this=0x8301388, 
inCurTime=69861632)
    at G-Force.cpp:1169
#3  0x40b7a772 in GForce::RecordSample(long, float*, float, long, 
float*, float, long) (this=0x8301388, inCurTime=896194457, 
inSound=0xbfffddb0, inScale=0,
    inNumBins=200, inFFT=0xbfffdae0, inFFTScale=1, inFFTNumBins=180)
    at G-Force.cpp:1123
#4  0x40b93ce5 in lv_gforce_render (plugin=0x40b82f47, video=0x40b82f47,
    audio=0x8301388) at actor_gforce.cpp:228
#5  0x40a93218 in visual_actor_run () from /usr/lib/libvisual.so.0
#6  0x407b0e70 in libvis_process ()
   from /usr//share/lives/plugins/effects/realtime/livido/libvis
#7  0x08067cb0 in gdk_pixbuf_new_from_generator (src=0x82e4d58, 
error=0x3e99b50f)
    at effects-livido.c:368
Cannot access memory at address 0x1e0

(gdb) print r1
$1 = 0
(gdb) print v1
$2 = 0







Program received signal SIGINT, Interrupt.
0x40b82f63 in ExprVirtualMachine::Execute() (this=0x40b82f5d)
    at ExprVirtualMachine.cpp:298
298                                             _fetch( r2, v2 )
(gdb) bt
#0  0x40b82f63 in ExprVirtualMachine::Execute() (this=0x40b82f5d)
    at ExprVirtualMachine.cpp:298
#1  0x40b829bd in ExprArray::Evaluate() (this=0x8302678) at Expression.h:24
#2  0x40b7e852 in WaveShape::Draw(long, PixPort&, float, WaveShape*, 
float) (
    this=0x83025c4, inNumSteps=200, inDest=@0x8301414, inFader=1,
    inWave2=0x83023bc, inMorphPct=1) at WaveShape.cpp:255
#3  0x40b7a925 in GForce::RecordSample(long) (this=0x8301388, inCurTime=43)
    at G-Force.cpp:1169
#4  0x40b7a772 in GForce::RecordSample(long, float*, float, long, 
float*, float, long) (this=0x8301388, inCurTime=896194457, 
inSound=0xbfffddb0, inScale=0,
    inNumBins=200, inFFT=0xbfffdae0, inFFTScale=1, inFFTNumBins=180)
    at G-Force.cpp:1123
#5  0x40b93ce5 in lv_gforce_render (plugin=0x40b82f5d, video=0x40b82f5d,
    audio=0x8301388) at actor_gforce.cpp:228
#6  0x40a93218 in visual_actor_run () from /usr/lib/libvisual.so.0
#7  0x407b0e70 in libvis_process ()
   from /usr//share/lives/plugins/effects/realtime/livido/libvis
#8  0x08067cb0 in gdk_pixbuf_new_from_generator (src=0x82e4d58, 
error=0x26759c2f)
    at effects-livido.c:368
Cannot access memory at address 0x1e0







Program received signal SIGINT, Interrupt.
0x40b829d8 in ExprArray::Evaluate() (this=0x8302470) at ExprArray.cpp:83
83      }
(gdb) bt
#0  0x40b829d8 in ExprArray::Evaluate() (this=0x8302470) at ExprArray.cpp:83
#1  0x40b7e86d in WaveShape::Draw(long, PixPort&, float, WaveShape*, 
float) (
    this=0x83025c4, inNumSteps=200, inDest=@0x8301414, inFader=1,
    inWave2=0x83023bc, inMorphPct=1) at WaveShape.cpp:257
#2  0x40b7a925 in GForce::RecordSample(long) (this=0x8301388, 
inCurTime=137342157)
    at G-Force.cpp:1169
#3  0x40b7a772 in GForce::RecordSample(long, float*, float, long, 
float*, float, long) (this=0x8301388, inCurTime=896194457, 
inSound=0xbfffddb0, inScale=0,
    inNumBins=200, inFFT=0xbfffdae0, inFFTScale=1, inFFTNumBins=180)
    at G-Force.cpp:1123
#4  0x40b93ce5 in lv_gforce_render (plugin=0x8302470, video=0x8302470,
    audio=0x8301388) at actor_gforce.cpp:228
#5  0x40a93218 in visual_actor_run () from /usr/lib/libvisual.so.0
#6  0x407b0e70 in libvis_process ()
   from /usr//share/lives/plugins/effects/realtime/livido/libvis
#7  0x08067cb0 in gdk_pixbuf_new_from_generator (src=0x82e4d58, 
error=0x83022e0)
    at effects-livido.c:368
Cannot access memory at address 0x1e0








But it doesn't always crash, this one was fine:

libvisual INFO: no progname: New Particle: Airport
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested: 40
New Delta field: Accident
libvisual INFO: no progname: New wave shape: Arena
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested: 100
libvisual INFO: no progname: Looking up expression in dict: MAG
libvisual INFO: no progname: New Delta field: Acid_Gap_2
libvisual INFO: no progname: New Particle: Art__I_Suppose
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested:
libvisual INFO: no progname: New wave shape: A_New_Hope
libvisual DEBUG: no progname: void WaveShape::Load(ArgList&, long int) 
[(WaveShape.cpp,70)]: The number of bins requested: 130
libvisual INFO: no progname: Looking up expression in dict: MAG
libvisual INFO: no progname: Looking up expression in dict: MAG


Salsaman.