DLL Programmer's Guide for TNS/R Systems

Sample Sessions and Usage Notes
DLL Programmer’s Guide for TNS/R Systems—522203-002
6-15
Notes on Debugging
Public Libraries
PIC programs and DLLs can access hybrid SRLs in HP public libraries. Furthermore,
any HP products released as public SRLs will be automatically converted to hybrid
SRLs, as part of installing these public libraries at the customer site; and no change to
these SRLs is needed. The NonStop Server DLL structure does not allow private
hybrid SRLs.
Notes on Debugging
Inspect and Visual Inspect
Inspect does not support debugging of PIC programs, processes or snapshot files.
Inspect will not be able to debug PIC programs and there are no plans to add this
capability to Inspect. Furthermore, Inspect will not read a Snapshot file that was
created from a PIC process; an attempt to load a Snapshot file that was created from a
PIC process will result in an error and the snapshot file will not be loaded.
With the release of G06.20 (the DLL release), when a request is made to debug a
program that is PIC (Position Independent Code), Visual Inspect will be the default
debugger, not Inspect. If Visual Inspect is not available, DEBUG will be chosen as the
debugger for the process.
The G06.20 system includes versions of the Inspect Subsystem (T9226G06) and the
Visual Inspect server (T9756AAH) that support PIC programs and DLLs. This version
of the server requires version 2.4 of the Visual Inspect client (T7877AAD).
If you run version 2.3 of the client with a G06.20 system, it will be connected
automatically to the previous version of the server (T9756AAG), and you will not be
able to debug or analyze snapshot dumps from a PIC process.
Unfortunately, version 2.4 of the client is incompatible with earlier versions of the
server. Therefore, it can be difficult to debug from the same workstation on multiple
systems, where some run G06.20 and and some run earlier releases. There are two
ways to approach this problem:
•
Install the newer server on the older systems, along with a compatible version of
the Inspect Subsystem: You can install Visual Inspect Server SPR T9756AAH
and Inspect Subsystem SPR T9226AAK on a K-series HP NonStop server running
D45 or later, or on an S-series HP NonStop server running G05 through G06.19.
See the T9756AAH softdoc.
•
Install both versions 2.3 and 2.4 of the Visual Inspect Client on the workstation.
They cannot both run at the same time, and version 2.3 can encounter problems
after 2.4 has run. See the G06.20 Compendium.
Note that the VI client is “independent” and so must be ordered separately from
G06.20, and furthermore it is strongly advised that you ensure that you upgrade both
the client and server products at the same time.