Re: [Discuss-gnuradio] segfault

[Marcus Müller]

>Is this what you meant?
Exactly!

So let's have a look at the backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6001d2f in pmt::string_to_symbol(std::string const&) () from /
usr/local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
(gdb) bt
#0  0x00007ffff6001d2f in pmt::string_to_symbol(std::string const&) () 
from /usr/local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
#1  0x00007ffff6002079 in pmt::intern(std::string const&) () from /usr/
local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
#2  0x00007fffee193a0d in ?? () from /usr/lib/x86_64-linux-gnu/libgnuradio-
blocks.so.3.7.3


There's one problem I see here: libgnuradio-blocks has version 3.7.3 and
libgnuradio-pmt 3.7.6. This means you're mixing versions!
It's still a funny point to segfault, but you'll have to make sure not
to mix 3.7.3 and 3.7.6. From the way things are named
(pmt-3.7.6git.so.0.0.0 vs blocks.so.3.7.3) I'd assume that you have one
installation of GNU Radio that you've built yourself, and one that you
installed via your distribution's package manager, maybe?

Greetings,
Marcus


On 12/01/2014 02:13 PM, michele wrote:
> Il Sun, 30 Nov 2014 21:16:12 +0100, Marcus Müller ha scritto:
>
>> Hi Michele,
>>
>> if you built GNU Radio/gqrx with gcc, then the GNU Debugger might be of
>> immensive help.
>> First make sure you've built GNU Radio with debugging symbols ("cmake
>> -DCMAKE_BUILD_TYPE=RelWithDebInfo  [...]"), then start gqrx in the
>> debugger:
>>
>> ?> gdb $(which gqrx)
>> [lots of text from gdb]
>> (gdb) run [<enter>]
>>
>> should start gqrx and run until it segfaults. then use the backtrace
>> command in gdb:
>>
>> (gdb) bt [<enter>]
>>
>> which should show you in which function call hierarchy the fault
>> occurred.
>>
>> Greetings,
>> Marcus
>>
>> PS: don't worry about your English, it's quite fine :)
>> On 11/29/2014 07:30 PM, michele wrote:
>>> Hi to all.
>>> This is my first post here...i hope to have choosen the right place to
>>> ask....
>>>
>>> I'm currently trying to compile gqrx and gnuradio...everything went
>>> well, but when i run gqrx it won't start and give me this error:
>>>
>>> gqrx[5865]: segfault at 12d0 ip 00007f570ee76d2f sp 00007fff60fd9000
>>> error 4 in libgnuradio-pmt-3.7.6git.so.0.0.0[7f570ee44000+50000]
>>>
>>> I've asked on the gqrx group and the author (hi csete!!!) told me that
>>> most probably it's a bug/problem on gnuradio.
>>>
>>> I've no idea what's wrong...
>>>
>>>
>>> PS: it was running ok before i updated with git pull gnuradio (didn't
>>> do that since 2 months...).
>>>
>>> PSS: Sorry for my english!!!!
>>>
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list address@hidden
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> the project uses qmake instead of cmake....but i've tryed anyway...
> i get this from dbg:
>
> Starting program: /home/michele/Scrivania/gqrx.git/build/gqrx 
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff6001d2f in pmt::string_to_symbol(std::string const&) () from /
> usr/local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
> (gdb) bt
> #0  0x00007ffff6001d2f in pmt::string_to_symbol(std::string const&) () 
> from /usr/local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
> #1  0x00007ffff6002079 in pmt::intern(std::string const&) () from /usr/
> local/lib/libgnuradio-pmt-3.7.6git.so.0.0.0
> #2  0x00007fffee193a0d in ?? () from /usr/lib/x86_64-linux-gnu/libgnuradio-
> blocks.so.3.7.3
> #3  0x00007ffff7dea13a in call_init (l=<optimized out>, address@hidden, 
> address@hidden, address@hidden) at dl-
> init.c:78
> #4  0x00007ffff7dea223 in call_init (env=<optimized out>, argv=<optimized 
> out>, argc=<optimized out>, l=<optimized out>) at dl-init.c:36
> #5  _dl_init (main_map=0x7ffff7ffe1c8, argc=1, argv=0x7fffffffe078, 
> env=0x7fffffffe088) at dl-init.c:126
> #6  0x00007ffff7ddb24a in _dl_start_user () from /lib64/ld-linux-
> x86-64.so.2
> #7  0x0000000000000001 in ?? ()
> #8  0x00007fffffffe38c in ?? ()
> #9  0x0000000000000000 in ?? ()
>
> Is this what you meant?
>
>
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