[PD] Strange behavior using custom external

Robert Esler robert at urbanstew.org
Wed Feb 26 23:22:36 CET 2014


Hello everyone,
  I'm having a strange issue with a custom external built using C++.  When using my external in Pd I send it "set" commands using a message box to change internal parameters, e.g [set tempo $1( 
  The strange behavior is as follows:
   1)  Sometimes when opening the patch the word "tempo" as referenced above gets changed to some nonsensical characters or is missing altogether.  So my message looks like [set ðLᄌ $1( or [set $1(, even though it was saved as [set tempo $1(.
   2)  When the behavior above does not occur (e.g #1) and the message is preserved upon opening, it only will work as written once then the second time the message is nonsense again but does not actually display as having changed.  So the GUI still reads [set tempo $1( but actually prints to the Pd window as: print: set ðLᄌ 140.  
   3)  At times when running my object, after #2 has happened, Pd crashes and leaves a trace to:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000100b1a6a

VM Regions Near 0x100b1a6a:
    __LINKEDIT             00000000080a4000-00000000080a5000 [    4K] r--/rwx SM=COW  /Applications/Pd-extended.app/Contents/Resources/extra/pddp/pddplink.pd_darwin
--> 
    __TEXT                 0000000070000000-000000007015f000 [ 1404K] r-x/rwx SM=COW  /System/Library/Components/CoreAudio.component/Contents/MacOS/CoreAudio

 
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_c.dylib             	0x903833f0 strcmp + 80
1   pdextended                    	0x0001c493 gatom_key + 305
2   pdextended                    	0x000386cf canvas_key + 1659
3   pdextended                    	0x000540b0 pd_typedmess + 740
4   pdextended                    	0x00054107 pd_typedmess + 827
5   pdextended                    	0x00058394 binbuf_eval + 1224
6   pdextended                    	0x0006255c socketreceiver_read + 1734
7   pdextended                    	0x0006111c sys_domicrosleep + 381
8   pdextended                    	0x000611a8 sys_microsleep + 19
9   pdextended                    	0x0005e413 m_mainloop + 989
10  pdextended                    	0x00060e4b sys_main + 2909
11  pdextended                    	0x00002172 _start + 216
12  pdextended                    	0x00002099 start + 41

-----------

Right now I'm using Pd-extended 42.5, Mac OS X 10.8.5

I'm happy to supply more code, examples, details, etc. if someone can help.  
Much appreciated,
Rob

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20140226/3a6955ed/attachment.htm>


More information about the Pd-list mailing list