[chuck-users] 147th shred removed...segmentation fault? (Ryan Supak)

Ryan Supak ryansupak at gmail.com
Sun Jun 29 09:46:42 EDT 2014


Hooray! rs

On Sunday, June 29, 2014, Spencer Salazar <spencer at ccrma.stanford.edu>
wrote:

> Hey y'all,
>
> Think I figured this out, the internal message buffer (the one that says
> "sporking shred ...") was overflowing and randomly overwriting other parts
> of memory, causing crashes for seemingly unrelated reasons. Anyways, with
> the fix that is in the git repo, I can't get Michael's example to crash
> anymore. An updated release to come shortly!
>
> spencer
>
>
>
> On Tue, Jun 24, 2014 at 9:20 PM, Ryan Supak <ryansupak at gmail.com
> <javascript:_e(%7B%7D,'cvml','ryansupak at gmail.com');>> wrote:
>
>> I was able to work around it by not doing any Sporking in code, instead
>> just updating global variables.
>>
>> But, yeah, definite issue here.
>> rs
>>
>>
>> On Tuesday, June 24, 2014, Michael Heuer <heuermh at gmail.com
>> <javascript:_e(%7B%7D,'cvml','heuermh at gmail.com');>> wrote:
>>
>>> On linux, my example works fine with 1.3.3.0
>>>
>>> ...
>>> [chuck](VM): removing shred: 35000 (spork~exp)...
>>> count 34998
>>> [chuck](VM): removing shred: 35001 (spork~exp)...
>>> count 34999
>>> ^C[chuck]: cleaning up...
>>>
>>> but not with 1.3.4.0 built with alsa support
>>>
>>> $ ./chuck --silent ~/working/lick/examples/dmxBug.ck
>>> [chuck](VM): removing shred: 2 (spork~exp)...
>>> count 0
>>> [chuck](VM): removing shred: 3 (spork~exp)...
>>> count 1
>>> [chuck](VM): removing shred: 4 (spork~exp)...
>>> count 2
>>> [chuck](VM): removing shred: 5 (spork~exp)...
>>> count 3
>>> [chuck](VM): removing shred: 6 (spork~exp)...
>>> count 4
>>> [chuck](VM): removing shred: 7 (spork~exp)...
>>> count 5
>>> [chuck](VM): removing shred: 8 (spork~exp)...
>>> count 6
>>> [chuck](VM): removing shred: 9 (spork~exp)...
>>> count 7
>>> [chuck](VM): removing shred: 10 (spork~exp)...
>>> count 8
>>> [chuck](VM): removing shred: 11 (spork~exp)...
>>> count 9
>>> [chuck](VM): removing shred: 12 (spork~exp)...
>>> count 10
>>> [chuck](VM): removing shred: 13 (spork~exp)...
>>> count 11
>>> [chuck](VM): removing shred: 14 (spork~exp)...
>>> count 12
>>> [chuck](VM): removing shred: 15 (spork~exp)...
>>> count 13
>>> [chuck](VM): removing shred: 16 (spork~exp)...
>>> count 14
>>> [chuck](VM): removing shred: 17 (spork~exp)...
>>> count 15
>>> [chuck](VM): removing shred: 18 (spork~exp)...
>>> count 16
>>> [chuck](VM): removing shred: 19 (spork~exp)...
>>> count 17
>>> [chuck](VM): removing shred: 20 (spork~exp)...
>>> count 18
>>> [chuck](VM): removing shred: 21 (spork~exp)...
>>> count 19
>>> [chuck](VM): removing shred: 22 (spork~exp)...
>>> count 20
>>> [chuck](VM): removing shred: 23 (spork~exp)...*** buffer overflow
>>> detected ***: ./chuck terminated
>>> ======= Backtrace: =========
>>> /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7fd43586cf47]
>>> /lib/x86_64-linux-gnu/libc.so.6(+0x109e40)[0x7fd43586be40]
>>> /lib/x86_64-linux-gnu/libc.so.6(+0x108d13)[0x7fd43586ad13]
>>> ./chuck[0x41585a]
>>> ./chuck[0x41cabb]
>>> ./chuck[0x46d898]
>>> ./chuck[0x50517f]
>>> ./chuck[0x4245d0]
>>> ./chuck[0x418d0e]
>>> ./chuck[0x41dbd2]
>>> ./chuck[0x41e077]
>>> ./chuck[0x40b6fd]
>>> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7fd43578376d]
>>> ./chuck[0x40dc55]
>>> ======= Memory map: ========
>>> 00400000-0059d000 r-xp 00000000 08:03 269080
>>>   /home/heuermh/bin/chuck-1.3.4.0/src/chuck
>>> 0079d000-0079e000 r--p 0019d000 08:03 269080
>>>   /home/heuermh/bin/chuck-1.3.4.0/src/chuck
>>> 0079e000-007c5000 rw-p 0019e000 08:03 269080
>>>   /home/heuermh/bin/chuck-1.3.4.0/src/chuck
>>> 007c5000-0084a000 rw-p 00000000 00:00 0
>>> 01db2000-020f9000 rw-p 00000000 00:00 0
>>>  [heap]
>>> 7fd428000000-7fd428021000 rw-p 00000000 00:00 0
>>> 7fd428021000-7fd42c000000 ---p 00000000 00:00 0
>>> 7fd42f3d8000-7fd42f3d9000 ---p 00000000 00:00 0
>>> 7fd42f3d9000-7fd42fbd9000 rw-p 00000000 00:00 0
>>> 7fd42fbd9000-7fd42fbdd000 r-xp 00000000 08:03 802428
>>>   /usr/lib/chuck/GVerb.chug
>>> 7fd42fbdd000-7fd42fddd000 ---p 00004000 08:03 802428
>>>   /usr/lib/chuck/GVerb.chug
>>> 7fd42fddd000-7fd42fdde000 r--p 00004000 08:03 802428
>>>   /usr/lib/chuck/GVerb.chug
>>> 7fd42fdde000-7fd42fddf000 rw-p 00005000 08:03 802428
>>>   /usr/lib/chuck/GVerb.chug
>>> 7fd42fddf000-7fd42fde1000 r-xp 00000000 08:03 802423
>>>   /usr/lib/chuck/KasFilter.chug
>>> 7fd42fde1000-7fd42ffe0000 ---p 00002000 08:03 802423
>>>   /usr/lib/chuck/KasFilter.chug
>>> 7fd42ffe0000-7fd42ffe1000 r--p 00001000 08:03 802423
>>>   /usr/lib/chuck/KasFilter.chug
>>> 7fd42ffe1000-7fd42ffe2000 rw-p 00002000 08:03 802423
>>>   /usr/lib/chuck/KasFilter.chug
>>> 7fd42ffe2000-7fd42fff0000 r-xp 00000000 08:03 802430
>>>   /usr/lib/chuck/Spectacle.chug
>>> 7fd42fff0000-7fd4301ef000 ---p 0000e000 08:03 802430
>>>   /usr/lib/chuck/Spectacle.chug
>>> 7fd4301ef000-7fd4301f0000 r--p 0000d000 08:03 802430
>>>   /usr/lib/chuck/Spectacle.chug
>>> 7fd4301f0000-7fd4301f1000 rw-p 0000e000 08:03 802430
>>>   /usr/lib/chuck/Spectacle.chug
>>> 7fd4301f1000-7fd430209000 r-xp 00000000 08:03 3411496
>>>   /lib/x86_64-linux-gnu/libresolv-2.15.so
>>> 7fd430209000-7fd430409000 ---p 00018000 08:03 3411496
>>>   /lib/x86_64-linux-gnu/libresolv-2.15.so
>>> 7fd430409000-7fd43040a000 r--p 00018000 08:03 3411496
>>>   /lib/x86_64-linux-gnu/libresolv-2.15.so
>>> 7fd43040a000-7fd43040b000 rw-p 00019000 08:03 3411496
>>>   /lib/x86_64-linux-gnu/libresolv-2.15.so
>>> 7fd43040b000-7fd43040d000 rw-p 00000000 00:00 0
>>> 7fd43040d000-7fd430424000 r-xp 00000000 08:03 3411602
>>>   /lib/x86_64-linux-gnu/libnsl-2.15.so
>>> 7fd430424000-7fd430623000 ---p 00017000 08:03 3411602
>>>   /lib/x86_64-linux-gnu/libnsl-2.15.so
>>> 7fd430623000-7fd430624000 r--p 00016000 08:03 3411602
>>>   /lib/x86_64-linux-gnu/libnsl-2.15.so
>>> 7fd430624000-7fd430625000 rw-p 00017000 08:03 3411602
>>>   /lib/x86_64-linux-gnu/libnsl-2.15.so
>>> 7fd430625000-7fd430627000 rw-p 00000000 00:00 0
>>> 7fd430627000-7fd43062c000 r-xp 00000000 08:03 663153
>>>   /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0
>>> 7fd43062c000-7fd43082b000 ---p 00005000 08:03 663153
>>>   /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0
>>> 7fd43082b000-7fd43082c000 r--p 00004000 08:03 663153
>>>   /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0
>>> 7fd43082c000-7fd43082d000 rw-p 00005000 08:03 663153
>>>   /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0
>>> 7fd43082d000-7fd43082f000 r-xp 00000000 08:03 663140
>>>   /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0
>>> 7fd43082f000-7fd430a2e000 ---p 00002000 08:03 663140
>>>   /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0
>>> 7fd430a2e000-7fd430a2f000 r--p 00001000 08:03 663140
>>>   /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0
>>> 7fd430a2f000-7fd430a30000 rw-p 00002000 08:03 663140
>>>   /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0
>>> 7fd430a30000-7fd430a35000 r-xp 00000000 08:03 663205
>>>   /usr/lib/x86_64-linux-gnu/libasyncns.so.0.3.1
>>> 7fd430a35000-7fd430c34000 ---p 00005000 08:03 663205
>>>   /usr/lib/x86_64-linux-gnu/libasyncns.so.0.3.1
>>> 7fd430c34000-7fd430c35000 r--p 00004000 08:03 663205
>>>   /usr/lib/x86_64-linux-gnu/libasyncns.so.0.3.1
>>> 7fd430c35000-7fd430c36000 rw-p 00005000 08:03 663205
>>>   /usr/lib/x86_64-linux-gnu/libasyncns.so.0.3.1
>>> 7fd430c36000-7fd430c3e000 r-xp 00000000 08:03 3411651
>>>   /lib/x86_64-linux-gnu/libwrap.so.0.7.6
>>> 7fd430c3e000-7fd430e3d000 ---p 00008000 08:03 3411651
>>>   /lib/x86_64-linux-gnu/libwrap.so.0.7.6
>>> 7fd430e3d000-7fd430e3e000 r--p 00007000 08:03 3411651
>>>   /lib/x86_64-linux-gnu/libwrap.so.0.7.6
>>> 7fd430e3e000-7fd430e3f000 rw-p 00008000 08:03 3411651
>>>   /lib/x86_64-linux-gnu/libwrap.so.0.7.6
>>> 7fd430e3f000-7fd430e5c000 r-xp 00000000 08:03 657105
>>>   /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
>>> 7fd430e5c000-7fd43105b000 ---p 0001d000 08:03 657105
>>>   /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
>>> 7fd43105b000-7fd43105c000 r--p 0001c000 08:03 657105
>>>   /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
>>> 7fd43105c000-7fd43105d000 rw-p 0001d000 08:03 657105
>>>   /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
>>> 7fd43105d000-7fd431064000 r-xp 00000000 08:03 663531
>>>   /usr/lib/x86_64-linux-gnu/libjson.so.0.0.1
>>> 7fd431064000-7fd431263000 ---p 00007000 08:03 663531
>>>   /usr/lib/x86_64-linux-gnu/libjson.so.0.0.1
>>> 7fd431263000-7fd431264000 r--p 00006000 08:03 663531
>>>   /usr/lib/x86_64-linux-gnu/libjson.so.0.0.1
>>> 7fd431264000-7fd431265000 rw-p 00007000 08:03 663531
>>>   /usr/lib/x86_64-linux-gnu/libjson.so.0.0.1
>>> 7fd431265000-7fd431287000 r-xp 00000000 08:03 3411639
>>>   /lib/x86_64-linux-gnu/libtinfo.so.5.9
>>> 7fd431287000-7fd431487000 ---p 00022000 08:03 3411639
>>>   /lib/x86_64-linux-gnu/libtinfo.so.5.9
>>> 7fd431487000-7fd43148b000 r--p 00022000 08:03 3411639
>>>   /lib/x86_64-linux-gnu/libtinfo.so.5.9
>>> 7fd43148b000-7fd43148c000 rw-p 00026000 08:03 3411639
>>>   /lib/x86_64-linux-gnu/libtinfo.so.5.9
>>> 7fd43148c000-7fd4314e8000 r-xp 00000000 08:03 662027
>>>   /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
>>> 7fd4314e8000-7fd4316e8000 ---p 0005c000 08:03 662027
>>>   /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
>>> 7fd4316e8000-7fd4316e9000 r--p 0005c000 08:03 662027
>>>   /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
>>> 7fd4316e9000-7fd4316ea000 rw-p 0005d000 08:03 662027
>>>   /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
>>> 7fd4316ea000-7fd431730000 r-xp 00000000 08:03 661818
>>>   /usr/lib/x86_64-linux-gnu/libpulse.so.0.13.5
>>> 7fd431730000-7fd431930000 ---p 00046000 08:03 661818
>>>   /usr/lib/x86_64-linux-gnu/libpulse.so.0.13.5
>>> 7fd431930000-7fd431931000 r--p 00046000 08:03 661818
>>>   /usr/lib/x86_64-linux-gnu/libpulse.so.0.13.5
>>> 7fd431931000-7fd431932000 rw-p 00047000 08:03 661818
>>>   /usr/lib/x86_64-linux-gnu/libpulse.so.0.13.5
>>> 7fd431932000-7fd43196e000 r-xp 00000000 08:03 3411615
>>>   /lib/x86_64-linux-gnu/libpcre.so.3.12.1
>>> 7fd43196e000-7fd431b6d000 ---p 0003c000 08:03 3411615
>>>   /lib/x86_64-linux-gnu/libpcre.so.3.12.1
>>> 7fd431b6d000-7fd431b6e000 r--p 0003b000 08:03 3411615
>>>   /lib/x86_64-linux-gnu/libpcre.so.3.12.1
>>> 7fd431b6e000-7fd431b6f000 rw-p 0003c000 08:03 3411615
>>>   /lib/x86_64-linux-gnu/libpcre.so.3.12.1
>>> 7fd431b6f000-7fd431ba8000 r-xp 00000000 08:03 3411625
>>>   /lib/x86_64-linux-gnu/libreadline.so.6.2
>>> 7fd431ba8000-7fd431da8000 ---p 00039000 08:03 3411625
>>>   /lib/x86_64-linux-gnu/libreadline.so.6.2
>>> 7fd431da8000-7fd431daa000 r--p 00039000 08:03 3411625
>>>   /lib/x86_64-linux-gnu/libreadline.so.6.2
>>> 7fd431daa000-7fd431db0000 rw-p 0003b000 08:03 3411625
>>>   /lib/x86_64-linux-gnu/libreadline.so.6.2
>>> 7fd431db0000-7fd431db1000 rw-p 00000000 00:00 0
>>> 7fd431db1000-7fd431df3000 r-xp 00000000 08:03 3407910
>>>   /lib/x86_64-linux-gnu/libdbus-1.so.3.5.8
>>> 7fd431df3000-7fd431ff3000 ---p 00042000 08:03 3407910
>>>   /lib/x86_64-linux-gnu/libdbus-1.so.3.5.8
>>> 7fd431ff3000-7fd431ff4000 r--p 00042000 08:03 3407910
>>>   /lib/x86_64-linux-gnu/libdbus-1.so.3.5.8
>>> 7fd431ff4000-7fd431ff5000 rw-p 00043000 08:03 3407910
>>>   /lib/x86_64-linux-gnu/libdbus-1.so.3.5.8
>>> 7fd431ff5000-7fd431ff8000 r-xp 00000000 08:03 662026
>>>   /usr/lib/x86_64-linux-gnu/libpulse-simple.so.0.0.3
>>> 7fd431ff8000-7fd4321f7000 ---p 00003000 08:03 662026
>>>   /usr/lib/x86_64-linux-gnu/libpulse-simple.so.0.0.3
>>> 7fd4321f7000-7fd4321f8000 r--p 00002000 08:03 662026
>>>   /usr/lib/x86_64-linux-gnu/libpulse-simple.so.0.0.3
>>> 7fd4321f8000-7fd4321f9000 rw-p 00003000 08:03 662026
>>>   /usr/lib/x86_64-linux-gnu/libpulse-simple.so.0.0.3
>>> 7fd4321f9000-7fd43220c000 r-xp 00000000 08:03 656534
>>>   /usr/lib/x86_64-linux-gnu/libjack.so.0.0.28
>>> 7fd43220c000-7fd43240b000 ---p 00013000 08:03 656534
>>>   /usr/lib/x86_64-linux-gnu/libjack.so.0.0.28
>>> 7fd43240b000-7fd43240c000 r--p 00012000 08:03 656534
>>>   /usr/lib/x86_64-linux-gnu/libjack.so.0.0.28
>>> 7fd43240c000-7fd43240d000 rw-p 00013000 08:03 656534
>>>   /usr/lib/x86_64-linux-gnu/libjack.so.0.0.28
>>> 7fd43240d000-7fd432416000 rw-p 00000000 00:00 0
>>> 7fd432416000-7fd432508000 r-xp 00000000 08:03 3407908
>>>   /lib/x86_64-linux-gnu/libglib-2.0.so.0.3200.4
>>> 7fd432508000-7fd432708000 ---p 000f2000 08:03 3407908
>>>   /lib/x86_64-linux-gnu/libglib-2.0.so.0.3200.4
>>> 7fd432708000-7fd432709000 r--p 000f2000 08:03 3407908
>>>   /lib/x86_64-linux-gnu/libglib-2.0.so.0.3200.4
>>> 7fd432709000-7fd43270a000 rw-p 000f3000 08:03 3407908
>>>   /lib/x86_64-linux-gnu/libglib-2.0.so.0.3200.4
>>> 7fd43270a000-7fd43270b000 rw-p 00000000 00:00 0
>>> 7fd43270b000-7fd43275f000 r-xp 00000000 08:03 671207
>>>   /usr/lib/x86_64-linux-gnu/libfluidsynth.so.1.5.1
>>> 7fd43275f000-7fd43295f000 ---p 00054000 08:03 671207
>>>   /usr/lib/x86_64-linux-gnu/libfluidsynth.so.1.5.1
>>> 7fd43295f000-7fd432960000 r--p 00054000 08:03 671207
>>>   /usr/lib/x86_64-linux-gnu/libfluidsynth.so.1.5.1
>>> 7fd432960000-7fd432962000 rw-p 00055000 08:03 671207
>>>   /usr/lib/x86_64-linux-gnu/libfluidsynth.so.1.5.1
>>> 7fd432962000-7fd4329d0000 rw-p 00000000 00:00 0
>>> 7fd4329d0000-7fd4329d2000 r-xp 00000000 08:03 802431
>>>   /usr/lib/chuck/FluidSynth.chug
>>> 7fd4329d2000-7fd432bd1000 ---p 00002000 08:03 802431
>>>   /usr/lib/chuck/FluidSynth.chug
>>> 7fd432bd1000-7fd432bd2000 r--p 00001000 08:03 802431
>>>   /usr/lib/chuck/FluidSynth.chug
>>> 7fd432bd2000-7fd432bd3000 rw-p 00002000 08:03 802431
>>>   /usr/lib/chuck/FluidSynth.chug
>>> 7fd432bd3000-7fd432bda000 r-xp 00000000 08:03 796739
>>>   /usr/lib/chuck/Sigmund.chug
>>> 7fd432bda000-7fd432dd9000 ---p 00007000 08:03 796739
>>>   /usr/lib/chuck/Sigmund.chug
>>> 7fd432dd9000-7fd432dda000 r--p 00006000 08:03 796739
>>>   /usr/lib/chuck/Sigmund.chug
>>> 7fd432dda000-7fd432ddb000 rw-p 00007000 08:03 796739
>>>   /usr/lib/chuck/Sigmund.chug
>>> 7fd432ddb000-7fd432de6000 r-xp 00000000 08:03 802429
>>>   /usr/lib/chuck/Mesh2D.chug
>>> 7fd432de6000-7fd432fe5000 ---p 0000b000 08:03 802429
>>>   /usr/lib/chuck/Mesh2D.chug
>>> 7fd432fe5000-7fd432fe6000 r--p 0000a000 08:03 802429
>>>   /usr/lib/chuck/Mesh2D.chug
>>> 7fd432fe6000-7fd432fe7000 rw-p 0000b000 08:03 802429
>>>   /usr/lib/chuck/Mesh2D.chug
>>> 7fd432fe7000-7fd432fe9000 r-xp 00000000 08:03 802426
>>>   /usr/lib/chuck/PanN.chug
>>> 7fd432fe9000-7fd4331e9000 ---p 00002000 08:03 802426
>>>   /usr/lib/chuck/PanN.chug
>>> 7fd4331e9000-7fd4331ea000 r--p 00002000 08:03 802426
>>>   /usr/lib/chuck/PanN.chug
>>> 7fd4331ea000-7fd4331eb000 rw-p 00003000 08:03 802426
>>>   /usr/lib/chuck/PanN.chug
>>> 7fd4331eb000-7fd4331ed000 r-xp 00000000 08:03 797714
>>>   /usr/lib/chuck/ExpDelay.chug
>>> 7fd4331ed000-7fd4333ed000 ---p 00002000 08:03 797714
>>>   /usr/lib/chuck/ExpDelay.chug
>>> 7fd4333ed000-7fd4333ee000 r--p 00002000 08:03 797714
>>>   /usr/lib/chuck/ExpDelay.chug
>>> 7fd4333ee000-7fd4333ef000 rw-p 00003000 08:03 797714
>>>   /usr/lib/chuck/ExpDelay.chug
>>> 7fd4333ef000-7fd4333f3000 r-xp 00000000 08:03 802427
>>>   /usr/lib/chuck/PitchTrack.chug
>>> 7fd4333f3000-7fd4335f2000 ---p 00004000 08:03 802427
>>>   /usr/lib/chuck/PitchTrack.chug
>>> 7fd4335f2000-7fd4335f3000 r--p 00003000 08:03 802427
>>>   /usr/lib/chuck/PitchTrack.chug
>>> 7fd4335f3000-7fd4335f4000 rw-p 00004000 08:03 802427
>>>   /usr/lib/chuck/PitchTrack.chug
>>> 7fd4335f4000-7fd4335f8000 r-xp 00000000 08:03 799399
>>>   /usr/lib/chuck/Ladspa.chug
>>> 7fd4335f8000-7fd4337f7000 ---p 00004000 08:03 799399
>>>   /usr/lib/chuck/Ladspa.chug
>>> 7fd4337f7000-7fd4337f8000 r--p 00003000 08:03 799399
>>>   /usr/lib/chuck/Ladspa.chug
>>> 7fd4337f8000-7fd4337f9000 rw-p 00004000 08:03 799399
>>>   /usr/lib/chuck/Ladspa.chug
>>> 7fd4337f9000-7fd4337fa000 r-xp 00000000 08:03 802424
>>>   /usr/lib/chuck/MagicSine.chug
>>> 7fd4337fa000-7fd4339f9000 ---p 00001000 08:03 802424
>>>   /usr/lib/chuck/MagicSine.chug
>>> 7fd4339f9000-7fd4339fa000 r--p 00000000 08:03 802424
>>>   /usr/lib/chuck/MagicSine.chug
>>> 7fd4339fa000-7fd4339fb000 rw-p 00001000 08:03 802424
>>>   /usr/lib/chuck/MagicSine.chug
>>> 7fd4339fb000-7fd4339fe000 r-xp 00000000 08:03 802421
>>>   /usr/lib/chuck/ABSaturator.chug
>>> 7fd4339fe000-7fd433bfd000 ---p 00003000 08:03 802421
>>>   /usr/lib/chuck/ABSaturator.chug
>>> 7fd433bfd000-7fd433bfe000 r--p 00002000 08:03 802421
>>>   /usr/lib/chuck/ABSaturator.chug
>>> 7fd433bfe000-7fd433bff000 rw-p 00003000 08:03 802421
>>>   /usr/lib/chuck/ABSaturator.chug
>>> 7fd433bff000-7fd433c00000 r-xp 00000000 08:03 802422
>>>   /usr/lib/chuck/Bitcrusher.chug
>>> 7fd433c00000-7fd433e00000 ---p 00001000 08:03 802422
>>>   /usr/lib/chuck/Bitcrusher.chug
>>> 7fd433e00000-7fd433e01000 r--p 00001000 08:03 802422
>>>   /usr/lib/chuck/Bitcrusher.chug
>>> 7fd433e01000-7fd433e02000 rw-p 00002000 08:03 802422
>>>   /usr/lib/chuck/Bitcrusher.chug
>>> 7fd433e02000-7fd433e05000 r-xp 00000000 08:03 802425
>>>   /usr/lib/chuck/FIR.chug
>>> 7fd433e05000-7fd434004000 ---p 00003000 08:03 802425
>>>   /usr/lib/chuck/FIR.chug
>>> 7fd434004000-7fd434005000 r--p 00002000 08:03 802425
>>>   /usr/lib/chuck/FIR.chug
>>> 7fd434005000-7fd434006000 rw-p 00003000 08:03 802425
>>>   /usr/lib/chuck/FIR.chug
>>> 7fd434006000-7fd43400b000 r-xp 00000000 08:03 802432
>>>   /usr/lib/chuck/Elliptic.chug
>>> 7fd43400b000-7fd43420a000 ---p 00005000 08:03 802432
>>>   /usr/lib/chuck/Elliptic.chug
>>> 7fd43420a000-7fd43420b000 r--p 00004000 08:03 802432
>>>   /usr/lib/chuck/Elliptic.chug
>>> 7fd43420b000-7fd43420c000 rw-p 00005000 08:03 802432
>>>   /usr/lib/chuck/Elliptic.chug
>>> 7fd43420c000-7fd43420d000 rw-p 00000000 00:00 0
>>> 7fd43420d000-7fd43420e000 ---p 00000000 00:00 0
>>> 7fd43420e000-7fd434a0e000 rw-p 00000000 00:00 0
>>> 7fd434a0e000-7fd434a14000 r-xp 00000000 08:03 663601
>>>   /usr/lib/x86_64-linux-gnu/libogg.so.0.7.1
>>> 7fd434a14000-7fd434c13000 ---p 00006000 08:03 663601
>>>   /usr/lib/x86_64-linux-gnu/libogg.so.0.7.1
>>> 7fd434c13000-7fd434c14000 r--p 00005000 08:03 663601
>>>   /usr/lib/x86_64-linux-gnu/libogg.so.0.7.1
>>> 7fd434c14000-7fd434c15000 rw-p 00006000 08:03 663601
>>>   /usr/lib/x86_64-linux-gnu/libogg.so.0.7.1
>>> 7fd434c15000-7fd434c40000 r-xp 00000000 08:03 663780
>>>   /usr/lib/x86_64-linux-gnu/libvorbis.so.0.4.5
>>> 7fd434c40000-7fd434e3f000 ---p 0002b000 08:03 663780
>>>   /usr/lib/x86_64-linux-gnu/libvorbis.so.0.4.5
>>> 7fd434e3f000-7fd434e40000 r--p 0002a000 08:03 663780
>>>   /usr/lib/x86_64-linux-gnu/libvorbis.so.0.4.5
>>> 7fd434e40000-7fd434e41000 rw-p 0002b000 08:03 663780
>>>   /usr/lib/x86_64-linux-gnu/libvorbis.so.0.4.5
>>> 7fd434e41000-7fd4350f4000 r-xp 00000000 08:03 663782
>>>   /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2.0.8
>>> 7fd4350f4000-7fd4352f3000 ---p 002b3000 08:03 663782
>>>   /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2.0.8
>>> 7fd4352f3000-7fd43530f000 r--p 002b2000 08:03 663782
>>>   /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2.0.8
>>> 7fd43530f000-7fd435310000 rw-p 002ce000 08:03 663782
>>>   /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2.0.8
>>> 7fd435310000-7fd435358000 r-xp 00000000 08:03 663073
>>>   /usr/lib/x86_64-linux-gnu/libFLAC.so.8.2.0
>>> 7fd435358000-7fd435558000 ---p 00048000 08:03 663073
>>>   /usr/lib/x86_64-linux-gnu/libFLAC.so.8.2.0Aborted (core dumped)
>>>
>>> I suppose we should move this to an issue on github at some point. . .
>>>
>>>    michael
>>>
>>>
>>> On Mon, Jun 23, 2014 at 9:17 PM, Ryan Supak <ryansupak at gmail.com> wrote:
>>> > Yuck, it behaves badly on Mac, but even worse on RPi. I get to maybe 30
>>> > shreds before it tanks... rs
>>> >
>>> >
>>> > On Mon, Jun 23, 2014 at 5:33 PM, Michael Heuer <heuermh at gmail.com>
>>> wrote:
>>> >>
>>> >> Oops, forgot to increment count
>>> >>
>>> >>   <<<"count", count++>>>;
>>> >>
>>> >> ...
>>> >>
>>> >> $ chuck --silent examples/dmxBug.ck
>>> >> [chuck](VM): removing shred: 2 (spork~exp)...
>>> >> count 0
>>> >> [chuck](VM): removing shred: 3 (spork~exp)...
>>> >> count 1
>>> >> ...
>>> >> [chuck](VM): removing shred: 144 (spork~exp)...
>>> >> count 142
>>> >> [chuck](VM): removing shred: 145 (spork~exp)...
>>> >> count 143
>>> >> [chuck](VM): removing shred: 146 (spork~exp)...
>>> >> Segmentation fault: 11
>>> >>
>>> >>
>>> >> On Mon, Jun 23, 2014 at 5:31 PM, Michael Heuer <heuermh at gmail.com>
>>> wrote:
>>> >> > Interesting find, even this simple example blows for me
>>> >> >
>>> >> > dmxBug.ck:
>>> >> >
>>> >> > fun void blink()
>>> >> > {
>>> >> >   while (true)
>>> >> >   {
>>> >> >     50::ms => now;
>>> >> >   }
>>> >> > }
>>> >> >
>>> >> > Shred shred;
>>> >> > spork ~ blink() @=> shred;
>>> >> >
>>> >> > 0 => int count;
>>> >> >
>>> >> > while (true)
>>> >> > {
>>> >> >   200::ms => now;
>>> >> >   shred.id() => Machine.remove;
>>> >> >   spork ~ blink() @=> shred;
>>> >> >   <<<"count", count>>>;
>>> >> > }
>>> >> >
>>> >> > $ chuck --silent examples/dmxBug.ck
>>> >> > ...
>>> >> > [chuck](VM): removing shred: 144 (spork~exp)...
>>> >> > count 0
>>> >> > [chuck](VM): removing shred: 145 (spork~exp)...
>>> >> > count 0
>>> >> > [chuck](VM): removing shred: 146 (spork~exp)...
>>> >> > Segmentation fault: 11
>>> >> >
>>> >> >    michael
>>> >> >
>>> >> >
>>> >> > On Mon, Jun 23, 2014 at 5:17 PM, Ryan Supak <ryansupak at gmail.com>
>>> wrote:
>>> >> >> Update: I eliminated everything I could from the Shreds that were
>>> being
>>> >> >> Sporked, and I still get the exact same error (at exactly 147
>>> Shreds.)
>>> >> >>
>>> >> >> Here is what I shortened the Shreds to:
>>> >> >>
>>> >> >> fun void Blink()
>>> >> >> {
>>> >> >>     while( true )
>>> >> >>     {
>>> >> >>         50::ms => now;
>>> >> >>     }
>>> >> >> }
>>> >> >>
>>> >> >> fun void LFOMod()
>>> >> >> {
>>> >> >>     while( true )
>>> >> >>     {
>>> >> >>         50::ms => now;
>>> >> >>     }
>>> >> >> }
>>> >> >>
>>> >> >>
>>> >> >> On Mon, Jun 23, 2014 at 4:22 PM, Ryan Supak <ryansupak at gmail.com>
>>> >> >> wrote:
>>> >> >>>
>>> >> >>> Thanks for the thorough reply. I'm doing one safer, even than
>>> "voice
>>> >> >>> stealing": each Spork is, at most, reconfiguring a single global
>>> >> >>> oscillator.
>>> >> >>>
>>> >> >>> Attached is the entire source. Lines 128-142 contain
>>> initialization
>>> >> >>> code
>>> >> >>> that creates a Shred to make an LED blink by sending a MIDI
>>> message
>>> >> >>> within a
>>> >> >>> time loop, and another Shred that sets the frequency of an LFO,
>>> polls
>>> >> >>> it
>>> >> >>> every ten milliseconds, and sends some Serial output based on the
>>> LFO
>>> >> >>> position.
>>> >> >>>
>>> >> >>> Anytime that the parameters controlling the blinking rate and the
>>> LFO
>>> >> >>> rate/phase have occasion to change (when MIDI events come in to
>>> change
>>> >> >>> them), the "old" Shreds are Machine.Remove'd and they're recreated
>>> >> >>> immediately following. You can see this at lines 343 and 589.
>>> >> >>>
>>> >> >>> Notice that the LFOMod function and the Blink function aren't
>>> creating
>>> >> >>> anything new (with the exception of local arguments being
>>> >> >>> instantiated), but
>>> >> >>> if you think those local arguments could be causing my problem
>>> I'll
>>> >> >>> eliminate them too.
>>> >> >>>
>>> >> >>> Please see the attached.
>>> >> >>> rs
>>> >> >>>
>>> >> >>>
>>> >> >>> On Mon, Jun 23, 2014 at 11:59 AM, Perry R Cook <
>>> prc at cs.princeton.edu>
>>> >> >>> wrote:
>>> >> >>>>
>>> >> >>>> I have lots of programs that spork hundreds or thousands
>>> >> >>>> of shreds without this error.  So, without seeing your
>>> >> >>>> code, my guesses (and questions) are as follows:
>>> >> >>>>
>>> >> >>>> Are you running this on a small memory architecture? Since
>>> >> >>>> you say headless, I'm guessing maybe Raspberry Pi?  It
>>> >> >>>> could be that you're running out of memory, so see next
>>> >> >>>> question.
>>> >> >>>>
>>> >> >>>> Does the shred that you're sporking declare new UGs or
>>> >> >>>> require memory to be allocated (arrays, lots of string
>>> >> >>>> manipulation, etc.)?  In general, this is a bad idea if you
>>> >> >>>> can avoid it.  ChucK does no garbage collection, which
>>> >> >>>> means that you need to be cautious about declaring memory.
>>> >> >>>>
>>> >> >>>> So even a shred as simple as:
>>> >> >>>>
>>> >> >>>> fun void mySine()  {
>>> >> >>>>     SinOsc s => dac;
>>> >> >>>>     Math.random2f(100,1000) => s.freq;
>>> >> >>>>     second => now;
>>> >> >>>>     s =< dac;
>>> >> >>>> }
>>> >> >>>>
>>> >> >>>> will eat up memory, because even though the SinOsc
>>> >> >>>> is unchucked and never computes again, the memory
>>> >> >>>> for that structure is still around.  We want, someday
>>> >> >>>> to make ChucK a proper garbage collecting language,
>>> >> >>>> but it's hard, especially for real-time systems.
>>> >> >>>>
>>> >> >>>> If this turns out to be your issue, then one way to
>>> >> >>>> handle this is to make a global pool of fixed
>>> >> >>>> resources and have your shred grab from that.
>>> >> >>>> Like classic "round robin voice stealing" in
>>> >> >>>> synthesizers:
>>> >> >>>>
>>> >> >>>> SinOsc s[100];
>>> >> >>>> 0 => int next2Use;
>>> >> >>>>
>>> >> >>>> fun void mySine() {
>>> >> >>>>     next2Use => int thisOne;
>>> >> >>>>     1 +=> next2Use;
>>> >> >>>>     if (next2Use > 99) 0 => next2Use;
>>> >> >>>>     s[thisOne] => dac;
>>> >> >>>>     Math.random2f(100,1000) => s[thisOne].freq;
>>> >> >>>>     second => now;
>>> >> >>>>     s[thisOne] =< dac;
>>> >> >>>> }
>>> >> >>>>
>>> >> >>>> // to test:
>>> >> >>>> while (1) {
>>> >> >>>>     Math.random2f(0.01,0.1) :: second => now;
>>> >> >>>>     spork ~ mySine();
>>> >> >>>> }
>>> >> >>>>
>>> >> >>>> I just fired up a few dozen of these running in
>>> >> >>>> parallel, VM showed 2600 total shreds running,
>>> >> >>>> no problem (and no clicks or dropouts!!).
>>> >> >>>>
>>> >> >>>> Hope this helps, if none of this applies, then you
>>> >> >>>> may have discovered a strange bug.  Source code please,
>>> >> >>>> and we can all scratch our heads on it.
>>> >> >>>>
>>> >> >>>>  Thanx!!  PRC
>>> >> >>>>
>>> >> >>>>
>>> >> >>>> Today's Topics:
>>> >> >>>>
>>> >> >>>>    1. 147th shred removed...segmentation fault? (Ryan Supak)
>>> >> >>>> _______________________________________________
>>> >> >>>> chuck-users mailing list
>>> >> >>>> chuck-users at lists.cs.princeton.edu
>>> >> >>>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>> >> >>>
>>> >> >>>
>>> >> >>
>>> >> >>
>>> >> >> _______________________________________________
>>> >> >> chuck-users mailing list
>>> >> >> chuck-users at lists.cs.princeton.edu
>>> >> >> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>> >> >>
>>> >> _______________________________________________
>>> >> chuck-users mailing list
>>> >> chuck-users at lists.cs.princeton.edu
>>> >> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>> >
>>> >
>>> >
>>> > _______________________________________________
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>>
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