[Discuss-gnuradio] Segmentation fault in volk_32f_s32f_multiply_32f_a_sse

[Alexandru Csete]

Greetings,

I'm getting segmentation faults in a C++ application when I restart
the flow graph, i.e by doing:

tb->start()
 ...
tb->stop()
tb->wait()
...
tb->start()
(crashes)

Running the application through a debugger suggests it is
volk_32f_s32f_multiply_32f_a_sse which is used by a gr_multiply_ff()
block. I end up with the attached assembly dump with a marker
highlighting line 19.

I have attached a simple python flow graph, which also crashes for me.
Note that the python code was originally generated by GRC and it used
gr.multiply_const_vff which didn't crash. I manually changed it to
gr.multiply_const_ff to provoke the crash.

This is happening on Ubuntu 11.04 64 bit and intel i7 processor. I'm
also seeing the message "Using Volk machine: sse4_2_64" when I start
the graph. GNU Radio is built using cmake.

Alex

volk_crash_dump.txt
Description: Text document

volk_crash.py
Description: Binary data