Hello list, I'm playing around with gqrx, an excellent example which great standalone software can be built with gnuradio.
I'm running phirsch's rtlsdr fork, do not have a Funcube Dongle or USRP at hand, but rather a Terratex NOXON DAB stick - 25€ part does the trick fine enough for me ;-) I'm running a self-compiled gnuradio rev3.6.0 on my Debian testing amd64 machine. Sometime it crashes with messages like "glibc detected *** gqrx: corrupted double-linked list". Firing up valgrind on it I find -besides several uninitialized variables- messages of the kind: ==31294== Invalid read of size 8 ==31294== at 0x4F782AC: float_dotprod_sse (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) [deleted some lines...] ==31294== Address 0x1a211ba8 is 440 bytes inside a block of size 447 alloc'd ==31294== at 0x402894D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==31294== by 0x4FB3C5E: malloc16Align (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4FB3CA9: calloc16Align (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F75E27: gr_fir_fff_simd::set_taps(std::vector<float, std::allocator<float> > const&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) [deleted some lines...] Full trace of that error below, I can provide a full trace of a run if needed. Usually the program runs stable, but occasionally it crashes. I played around with the internal bandwidth to get better FM reception - 75kHz is quite narrow for FM reception. This change seems to trigger the problems much faster. I hardly can change any parameters while running without a crash. I'm no expert, but it seems to me there is not enough memory allocated. Maybe an off-by-one error? Did anyone see things like that or used valgrind recently on gnuradio programs? What could I do to find out more about this problem? Regards Patrick --------------------------------------------------------- ==31294== Invalid read of size 8 ==31294== at 0x4F782AC: float_dotprod_sse (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F8A27F: gr_rational_resampler_base_fff::general_work(int, std::vector<int, std::allocator<int> >&, std::vector<void const*, std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F45CBD: gr_block_executor::run_one_iteration() (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F65AA8: gr_tpb_thread_body::gr_tpb_thread_body(boost::shared_ptr<gr_block>, int) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F60645: boost::detail::function::void_function_obj_invoker0<gruel::thread_body_wrapper<tpb_container>, void>::invoke(boost::detail::function::function_buffer&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x52BBCCD: boost::detail::thread_data<boost::function0<void> >::run() (in /usr/local/lib/libgruel-3.6.0.so.0.0.0) ==31294== by 0x81EA928: ??? (in /usr/lib/libboost_thread.so.1.49.0) ==31294== by 0x6C08B4F: start_thread (pthread_create.c:304) ==31294== by 0x76959DC: clone (clone.S:112) ==31294== Address 0x1a211ba8 is 440 bytes inside a block of size 447 alloc'd ==31294== at 0x402894D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==31294== by 0x4FB3C5E: malloc16Align (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4FB3CA9: calloc16Align (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F75E27: gr_fir_fff_simd::set_taps(std::vector<float, std::allocator<float> > const&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F8A144: gr_rational_resampler_base_fff::install_taps(std::vector<float, std::allocator<float> > const&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F8A5B6: gr_rational_resampler_base_fff::gr_rational_resampler_base_fff(unsigned int, unsigned int, std::vector<float, std::allocator<float> > const&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x4F8A826: gr_make_rational_resampler_base_fff(unsigned int, unsigned int, std::vector<float, std::allocator<float> > const&) (in /usr/local/lib/libgnuradio-core-3.6.0.so.0.0.0) ==31294== by 0x44A41D: resampler_ff::resampler_ff(unsigned int, unsigned int) (resampler_ff.cpp:71) ==31294== by 0x44A025: make_resampler_ff(unsigned int, unsigned int) (resampler_ff.cpp:33) ==31294== by 0x4141C9: receiver::receiver(std::string, std::string) (receiver.cpp:80) ==31294== by 0x41DBD9: MainWindow::MainWindow(QString, QWidget*) (mainwindow.cpp:64) ==31294== by 0x41D4D7: main (main.cpp:52) -- Engineers motto: cheap, good, fast: choose any two Patrick Strasser <patrick dot strasser at tugraz dot at> Student of Telematics, Graz Univ. of Technology, Austria _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
