Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Mon, 29 Oct 2018 17:06:02 -0700

A bit of luck.  By chance I typed 'pvinfo' when I meant to type 'pvget'
and replicated this issue.  It is a race.  I have fixed it in the pvtools
rewrite.  Please update and retest.

> cd modules/pvAccess
> git fetch md
> git reset --hard md/pvtoolsrework
> cd ../..
> make

https://github.com/epics-base/pvAccessCPP/pull/129

On 10/29/18 11:52 AM, Kasemir, Kay wrote:
>> Can you do a -debug build?
>> cat <<EOF >>configure/CONFIG_SITE.local
>> CROSS_COMPILER_TARGET_ARCHS+=\$(EPICS_HOST_ARCH)-debug
>> EOF
>> make
>> Then run in gdb:
>> gdb --args ./bin/linux-x86_64-debug/pvinfo TST:iq
>> b clientContextImpl.cpp:4679
>> r
>> # this break should be reached on success or failure.  when it is reached.
> 
> Isn't getting to that breakpoint.
> 
> $ pvget  training:ai1
> training:ai1 2018-10-29T14:46:34.573 2 MAJOR DEVICE LOLO 
> 
> $ pvinfo   training:ai1
> training:ai1 Error: channel destroyed
> 
> $ gdb --args bin/linux-x86_64-debug/pvinfo training:ai1
> GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-110.el7
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /home/training/epics-train/tools/epics-base/bin/linux-x86_64-debug/pvinfo...done.
> (gdb) b clientContextImpl.cpp:4679
> No source file named clientContextImpl.cpp.
> Make breakpoint pending on future shared library load? (y or [n]) y
> Breakpoint 1 (clientContextImpl.cpp:4679) pending.
> (gdb) r
> Starting program: /home/training/epics-train/tools/epics-base/bin/linux-x86_64-debug/pvinfo training:ai1
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> [New Thread 0x7ffff554f700 (LWP 10492)]
> [Thread 0x7ffff554f700 (LWP 10492) exited]
> [New Thread 0x7ffff7fd7700 (LWP 10493)]
> [New Thread 0x7ffff7f56700 (LWP 10494)]
> [New Thread 0x7ffff7ed5700 (LWP 10495)]
> [New Thread 0x7ffff4b3b700 (LWP 10496)]
> [New Thread 0x7ffff4aba700 (LWP 10497)]
> [New Thread 0x7ffff4a39700 (LWP 10498)]
> [New Thread 0x7ffff49b8700 (LWP 10499)]
> [New Thread 0x7ffff554f700 (LWP 10502)]
> [New Thread 0x7ffff46b5700 (LWP 10503)]
> [Thread 0x7ffff7fd7700 (LWP 10493) exited]
> training:ai1 Error: channel destroyed
> [Thread 0x7ffff554f700 (LWP 10502) exited]
> [Thread 0x7ffff7f56700 (LWP 10494) exited]
> [Thread 0x7ffff7ed5700 (LWP 10495) exited]
> [Thread 0x7ffff4b3b700 (LWP 10496) exited]
> [Thread 0x7ffff4aba700 (LWP 10497) exited]
> [Thread 0x7ffff4a39700 (LWP 10498) exited]
> [Thread 0x7ffff46b5700 (LWP 10503) exited]
> [Thread 0x7ffff49b8700 (LWP 10499) exited]
> [Inferior 1 (process 10488) exited with code 01]
> 
> 
> -Kay
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System