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Author Topic: Unknown exception code 32  (Read 912 times)

lazer

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Unknown exception code 32
« on: January 28, 2023, 04:18:14 pm »
Hi, I'm using the very flexible uos sound library for sound on Linux.

I had my project working fine building on both Linux and Win32.  Then a system up date seems to have messed stuff up , I had Lazarus complaining about different time stamps, libs newer than compiler and such like, so I reinstalled distro fpc 3.2.2. and used it to do a clean rebuild of my github 3.1.1 fpc.

I then removed the distro fpc, restored /etc/fpc.cfg renewed the symlinks to ppx64 et al removed the duplicate ppu files under fv and tried again.

My program mostly seems fine but crashes when I try to play sound on the dev system ( Fedora 36 ).

'External: Unknown exception code 32'.

I don't find any info googling this error and it is pretty unhelpful.

Here is a screenshot of the code dump.

It's really annoying when this was working fine before. Any ideas on how to chase this down ?

TIA

Code: Pascal  [Select][+][-]
  1. Lazarus 2.3.0 (rev main-2_3-2165-gc63984efd6) FPC 3.3.1 x86_64-linux-gtk2

Martin_fr

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Re: Unknown exception code 32
« Reply #1 on: January 28, 2023, 06:54:52 pm »
Try to use the gdb based debugger and see what it reports. Maybe it's more meaningful....

Menu: Tools > Options > Debugger > Debugger Backend

Martin_fr

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Re: Unknown exception code 32
« Reply #2 on: January 28, 2023, 06:58:15 pm »
Or recompile the IDE with -dDebuglnLinuxDebugEvents  // EDIT: using FpDebug

- Then start the IDE from a terminal (so you can see any output it writes to console)
- Alternatively start the IDE with --debug-log=somefile.txt  to get the output in that file

Then when the issue happens, get the last 50 lines of output, and post them here.
« Last Edit: January 28, 2023, 07:29:00 pm by Martin_fr »

Thaddy

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Re: Unknown exception code 32
« Reply #3 on: January 28, 2023, 08:26:55 pm »
Error 32 is NOT a Freepascal or Lazarus error....
Who is responsable for that!! The caller or the callee.. Out! ya'll, NOW. In UTC time, please, so maybe Yesterday or tomorrow.

lazer

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Re: Unknown exception code 32
« Reply #4 on: January 28, 2023, 08:35:25 pm »
Thanks Martin,

I switched the debugger and set compiler from -gd3 to -g, rebuild and ran with gdb as debugger. Now if I F8 or F9 from that problematic line I no longer crash but get no change :?   I see this on console for each key stroke:

Code: Pascal  [Select][+][-]
  1. Hint: (lazarus) [TMainIDE.DoRunProject] INIT
  2. Hint: (lazarus) [TMainIDE.DoRunProject] Debugger=TGDBMIDebugger
  3. Hint: (lazarus) [TMainIDE.DoRunProject] END
  4. Hint: (lazarus) [TMainIDE.DoRunProject] INIT
  5. Hint: (lazarus) [TMainIDE.DoRunProject] Debugger=TGDBMIDebugger
  6. Hint: (lazarus) [TMainIDE.DoRunProject] END
  7. Hint: (lazarus) [TMainIDE.DoRunProject] INIT
  8. Hint: (lazarus) [TMainIDE.DoRunProject] Debugger=TGDBMIDebugger
  9. Hint: (lazarus) [TMainIDE.DoRunProject] END

That's all I get in the log file too. :?



lazer

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Re: Unknown exception code 32
« Reply #5 on: January 28, 2023, 09:00:37 pm »
Error 32 is NOT a Freepascal or Lazarus error....

Good point.  It may be a rather badly trapped error in the uos code which is reporting a pseudo-windowsey error message.

I'm no longer getting the assy dump but still no sound.  I think that it Fedora's wireplumber sound system which is totally disfunctional and does everything it "thinks" I need to do instead of what I configure it to do.

Martin_fr

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Re: Unknown exception code 32
« Reply #6 on: January 28, 2023, 09:00:40 pm »
Quote
Now if I F8 or F9 from that problematic line I no longer crash but get no change
You mean the debugged project does not step, nor continue to run ?


Menu: View > Ide Internals > Debug Output
Open that window before you start debugging, then when the problem happens copy the last about 50 lines.

Martin_fr

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Re: Unknown exception code 32
« Reply #7 on: January 28, 2023, 09:05:09 pm »
Error 32 is NOT a Freepascal or Lazarus error....

Good point.  It may be a rather badly trapped error in the uos code which is reporting a pseudo-windowsey error message.

I'm no longer getting the assy dump but still no sound.  I think that it Fedora's wireplumber sound system which is totally disfunctional and does everything it "thinks" I need to do instead of what I configure it to do.

Indeed, it likely is part of a signal sent to the process (and first presented to the debugger).

However I could not find a signal corresponding to 32. Yet it could be, that other bits in the signal are set, and not reported.

I was hoping gdb would then report more info.



The -dDebuglnLinuxDebugEvents  option was to make FpDebug to print some info to the console, to see what exactly the OS had reported (resulting in the 32 given by FpDebug).

Leledumbo

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Re: Unknown exception code 32
« Reply #8 on: February 02, 2023, 10:18:23 am »
Error 32 is broken pipe, this can have quite a range of root cause. Try checking your audio server logs.

lazer

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Re: Unknown exception code 32
« Reply #9 on: February 02, 2023, 10:40:28 am »
Ah thanks, that makes sense in this context.

The issue is resolved now, can't recall what it was.  [Oh, look, there's an orange castle down there surrounded by plastic coral. I wonder where it came from ]

 

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