Re: [Gwc-general] Segfault during denoise.

[Jeff W. <we...@ya...>]

I think you have other problems with your SuSE setup.  I'm just guessing 
because line 422 in denoise.c for gwc-0.19-9 is the first executable 
line of code after a *lot* of memory has been allocated from the stack. 
  When you changed the DENOISE_MAX_FFT to 16384, you cut in half the 
memory needed to hold those arrays.  I'm on a Redhat 9.0 system, and my
glibc is 2.3.2-27.9, with gcc-3.2.2-5.  It's possible what you are 
seeing is because of the compiler difference, but that's usually the 
last place to check.

For an experiment, you could write a simple C routine that just 
allocates a lot of memory in local variables, and see if you can 
reproduce the error.

If you change DENOISE_MAX_FFT to 16384 in gwc-0.19-10, do you hear sound?

Anybody else have ideas or suggestions for Gottfried?

jw

Gottfried Necker wrote:
> Hi,
> 
> I tried to compile and run gwc-0.19-10 and gwc-0.19-9. First I tried 0.19-10. 
> On my system the audio playback did not work. I tried play a .wav file: 
> silence. The cursor did not move. No difference between OSS and Alsa.
> 
> Then I compiled 0.19-9. I can play the .wav file. I tried to declick. It 
> works.
> I tried to denoise, picked a sound sample, clicked on the denoise button: 
> segmentation fault. In the debugger I found that the segfault occured  in 
> denoise.c at line 422.  This is really strange. Just for fun, I reduced the 
> size of DENOISE_MAX_FFT to 16384. Now it works. This is even stranger. 
> 
> Could someone please explain what is going on there?
> 
> My system runs under SuSE Linux 8.2 (glibc 2.3.2, gcc 3.3.1, fftw 2.1.3).
> 
> The meschach configure script assumes that the current directory is in the 
> PATH. This is not always true.
> Lines like
> DEFS="$DEFS -DD_MACHEPS=`macheps`"
> should be
> DEFS="$DEFS -DD_MACHEPS=`./macheps`"
> 
> Thanks,
> Gottfried
> 
> 
> 
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