Experimental Physics and
Industrial Control System

Kay-Uwe Kasemir <[email protected]> · Fri, 17 Aug 2007 09:06:50 -0400

On Aug 17, 2007, at 08:39 , Dirk Zimoch wrote:
Ralph,
that's probably not the only CA problem in 3.14.9.

In May, I repored a bug to the Mantis bugtracker which has not even
been assigned until now. (Maybe posting it to tech-talk helps.)
Summary long integer values are corruped in R3.14.9

Description

When writing integer values with a CA client (e.g. medm) to a long
integer channel (e.g. longout record), the upper bytes get
corrupted. The lower 2 bytes are OK.

I can't see the error when the client is caput from base.

Client and IOC run on a linux-x86 machine.

The problem is new in 3.14.9.

Could that be related to this byte swapping issue in the known problems:
"G++ version 3.2.3
Jeff Hill reports the following:
During testing of R3.14.9 I see a bug showing up only in optimized
builds on Linux using g++ 3.2.3 that I don't see with other
compilers. This bug appears to be related to failure of this
particular compiler to follow the strict alias rules specified in the
standard when optimizing the byte swapping templates installed for
R3.14.9.
Problems
Red hat Linux g++ 3.2.3 when -O3 is specified
"
?
-Kay

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System