Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Tue, 6 Jul 2010 12:22:18 -0700

On Jul 6, 2010, at 12:04 PM, Rod Nussbaumer wrote:

> Hi all.
> 
> I'm trying to get EPICS running on an ARM CPU. So far I've got a build of EPICS (3.14.10 & 3.14.11) against a glibc 2.3.6 and Linux 2.6.21, where the only thread model supported is linuxthreads (not POSIX/nptl). When I run an IOC, the iocShell crashes (segfault), although the rest of the IOC (asyn device support), and record processing seem to stay running. Is this a reason to suspect the tread model?
> I see in the EPICS build commandline, the switch '-D_POSIX_THREADS'. Does this mean a strict POSIX thread model is required?
As far as I can tell that preprocessor macro is used nowhere in base so any behaviour that is dependent upon it would be in the glibc and system headers of your target machine.
> 
> The iocShell crashes right after iocInit. Running under gdb, I set a breakpoint on iocInit. I see:
> 
> 
> (gdb) step
> Single stepping until exit from function iocshBody,
> which has no line number information.
> epics>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 114696 (LWP 4439)]
> 0x0006be60 in ca_flush_io ()
> 
> Thanks for reading.
> 
> Rod Nussbaumer
> ISAC Controls, TRIUMF
> Vancouver, Canada

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System