Re: [Discuss-gnuradio] GRC 3.7.11 on Windows crashes python.exe

[Geof Nieboer]

Martjin,

On the windows build, most likely the problem is in the build scripts... we build two versions, one with maximum optimizations for AVX2 capable CPUs, and a generic one.  Sometimes, however, AVX2 instructions get into the regular build for a number of reasons (qwt in particular has been an issue because of qmake's build system).  That will cause the "illegal instruction" error.

SO, if you can confirm the below:

1- The machine you are running on has a somewhat older CPU

2- You downloaded the installer from the "any CPU" link.

If those cases are true, then the bug is in my scripts.  As I don't have a HackRF, it's difficult to test.  Please let me know the answer to the above.  In the meantime, download the HackRF dll directly from www.gcndevelopment.com/gnuradio/downloads.htm (near the bottom), and drop that in the /bin directory to see if that fixes the problem (renaming the old version to .old just in case), and see if that patches things up.  That's the DLL from the last build, but I don't believe the driver has changed so it should work.

Geof

On Fri, Apr 14, 2017 at 12:40 PM, Marcus Müller <address@hidden> wrote:

Hi Martijn,

"Illegal Instruction" is actually a proper processor fault (ie. your processor noticed a problem, and jumped to an interrupt routine telling your OS that hey, things need to be handled) that happens when one tries to execute code that isn't actually code or uses an instruction that your CPU doesn't have.

I'm pretty optimistic that hackrf.dll wasn't compiled for a CPU that's incompatible to yours, so this might essentially be a bug – either in the hackrf driver dll (which might be jumping into machine code that isn't code), or in the way the windows DLL loader is used. Hm. Maybe even a compiler bug.

Now, I have to admit that under Unixes, I'd know how to debug this, but under Windows, I'm out of my depth. So if you happen to be more capable than I am with that, you could try to run "python C:\path\to\your\flow_graph_python_file.py" in a debugger and see where it crashes. But even then, I don't know if things would be easy to figure out.

Best regards,
Marcus

On 14.04.2017 16:34, Martijn Scale wrote:

Trying to use a HackRF One with GNU Radio on Windows 10 (64-bits), installed from gnuradio_3.7.11_win64.msi.

When using osmocom Source and executing the flow graph, execution halts with message: python.exe has stopped working. GRC remains alive.

Crashes happen both with WX and QT. The HackRF One module is put into Receive mode (Rx Led of HackRF One is on).

 

GNU Radio, GRC, Hack RF and computer do work as expected with the GNURadioLiveDVD.

 

Debugging shows: Unhandled exception at 0x00007FFCCDDD3CCB (hackrf.dll) in python.exe: 0xC000001D: Illegal Instruction.

Additional info from Event Viewer:

Faulting application path: C:\Program Files\GNURadio-3.7\gr-python27\python.exe

Faulting module path: C:\Program Files\GNURadio-3.7\bin\hackrf.dll

And info from Console Panel in GRC:

Win32; Microsoft Visual C++ version 14.0; Boost_106000; UHD_003.010.001.001-0-unknown

 

hackrf.dll info: 2017-03-03, 66.560 Bytes

 

gr-osmosdr ae686c46 (0.1.5git) gnuradio 3.7.11

built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf airspy redpitaya

Number of USB devices: 17

USB device 1d50:xxxx: 0000000000000000a06063c82xxxxxxx match

Using HackRF One with firmware 2017.02.1

 

Hardware:

Processor           Intel(R) Core(TM) i7 CPU         860  @ 2.80GHz, 2794 Mhz, 4 Core(s), 8 Logical Processor(s)

Display adapter                AMD Radeon HD 5700 Series

 

Your support is highly appreciated (I tried building GNU Radio from sources, which failed as “gr-newmod/CMakeLists.txt was not found and is required”, but I decided not to pursue the building path any further as it exceeds my knowledge).

 

 

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