Re: [Discuss-gnuradio] Segmentation fault when "make check"

[Eric Blossom]

On Tue, Sep 01, 2009 at 03:51:41PM -0700, Milo Wong wrote:
> Hi All,
> 
> I was writing a new block and the "make" process of source files(.cc .h .i,
> etc) was successful. However, when I "make check" to test the block, there's
> an error message "Segmentation fault" coming out. I searched the previous
> discussions but there were not too much useful information. I know that only
> this error message is too vague for you. But I am still wondering if anyone
> could tell where might have the possible mistakes. I guess the problems may
> lie on the qa_test.py scripts which I post below. The lpi.itersum_ff blocks
> has 4 parallel input and one output. Any suggestions will be appreciated.


The bug is most likely in your new C++ code.
Run gdb to see where it's segfaulting.

  http://www.gnu.org/software/gnuradio/doc/howto-write-a-block.html#debugging

When it segfaults, use the "bt" command to generate a stack backtrace.

gdb docs here: http://www.gnu.org/software/gdb/documentation

Eric