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pothosware / gr-pothos

Pothos bindings for GNU Radio blocks
https://github.com/pothosware/gr-pothos/wiki
GNU General Public License v3.0
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the fosphorSupport module does not let the GUI start #8

Open akoun opened 7 years ago

akoun commented 7 years ago

PothosGui crashes with the following message

Exception: Assertion violation: _readfd != -1 in file "/build/poco-HOje2L/poco-1.7.8.2/Foundation/src/PipeImpl_POSIX.cpp", line 66

the presence of /usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so seems to be at the source of it, since removing it permits the GUI to start

PS: under Debian stretch with MyriadRF and pothosware-support/framework PPA's enabled for zesty

guruofquality commented 7 years ago

I wonder if the fosphor code is doing something like gui/window initialization that conflicts with how Qt is used in PothosGUI. I also wonder if it has something to do with Qt4 being used for fosphor (I think) and Qt5 for PothosGui. Just a guess:

Curious if this works from the command line: PothosUtil --load-module=/usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so

It also might be interesting to: gdb PothosGui run, and see where the crash is.

akoun commented 7 years ago

OK here it goes: $ PothosUtil --load-module=/usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so Loading: /usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so success!

$ gdb PothosGui GNU gdb (Debian 7.12-6) 7.12.0.20161007-git Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: http://www.gnu.org/software/gdb/bugs/. Find the GDB manual and other documentation resources online at: http://www.gnu.org/software/gdb/documentation/. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from PothosGui...(no debugging symbols found)...done. (gdb) run Starting program: /usr/bin/PothosGui [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7fffed512700 (LWP 18090)] [New Thread 0x7fffecd11700 (LWP 18091)] [New Thread 0x7fffe4d17700 (LWP 18092)] [New Thread 0x7fffda41d700 (LWP 18093)] [New Thread 0x7fffd9ad1700 (LWP 18094)] [Thread 0x7fffd9ad1700 (LWP 18094) exited] --> here it shows the assertion error window. I click OK and [Thread 0x7fffe4d17700 (LWP 18092) exited] [Thread 0x7fffed512700 (LWP 18090) exited] [Thread 0x7fffecd11700 (LWP 18091) exited] [Thread 0x7fffda41d700 (LWP 18093) exited] [Inferior 1 (process 18082) exited with code 01] (gdb)