Product News

z/XDC's Built-in Help is now on the web! [woohoo!]

we have started publishing z/XDC's Built-in Help as web pages that are far more user friendly than z/XDC's classic HELP command. The pages contain the same topics as the classic Built-in Help, but they have several additional features:

XDCADATA Utility Improvements

The XDCADATA utility filters ADATA files to remove excess ADATA. When properly set up, size reductions up to 90% or more could be achieved.

Two changes have been made, one to make it easier to identify DSECT maps to be excluded, the other to increase the size reduction even more!

Major Performance Improvement for c/XDC users!

Starting with update DBC-2302H, c/XDC users will notice two things:

  • They will quickly notice that the CWIDE and C80 profiles no longer display a LIST VSTACK command in their Watch Window.
  • They will also notice that STEP commands (PF9, PF10 and PF11) no longer perform sluggishly.

These two facts are related.

Using ALETs and Accessing Dataspaces with Dump/XDC

Just as classic z/XDC can access dataspaces in live storage, so can dump/XDC access dataspaces contained within a dump. Also like classic z/XDC, dump/XDC uses ALETs for accessing dataspaces.

The LIST RSA Command Has Been Fixed and Modernized!

At long last, we have turned our attention to the long languishing LIST RSA command and brought it forward into the modern era!

SYSPROGs: The z/XDC Maintenance Update Process has Changed!

We have made major changes to the processes for performing both maintenance updates and initial product installs:

  • WRT initial installs, we have completely done away with the use of SMP/E. Now the process is a straightforward unTERSE of an XMITs collection library followed by an XMIT-RECEIVEs job to create the several Product Libraries.
  • WRT maintenance updates, these now do full replacements of all Product Library content.

This means that the product shipment package for both initial installs and maintenance updates is the identically the same file for both purposes.

Major Performance Fix

Update DBC-2207D fixes a major performance bug in z/XDC. We urge all customers to download and install the fix as soon as possible...

Support added for the new Z16 Machine Instructions

IBM's new Z16 machine brings with it 22 new machine instructions as well as 16 new extended mnemonics. We have just published DBC-2206D to add support into z/XDC for formatting and displaying these new instructions.

New Tracing command - T BNC

There's a new TRACE command in town. It's called T BNC ("Branch-No-Call" trace). It works just like T BY except that it steps over subroutine calls! Specifically:

  • It follows your program's execution looking for branching instructions that will actually branch.
  • When execution reaches a linkage instruction (BAS, BAL, JAS, etc.),
  • And that instruction is being used to call a subroutine with return expected,
  • Then execution will not be followed into the subroutine.
  • Instead, recapture traps will be set at the return addresses,
  • And the subroutine will be allowed to run without being followed.

The major benefit of this change is that it makes it considerably more viable than previously to use conditional tracing!

A Grab Bag of Recent Command and Capabilities Changes

The last major change to z/XDC was the introduction of dump/XDC back in August. See LIST HELP DUMPS.) Since then we have published quite a number of fixes and changes of various sorts, as well as some lesser additions to z/XDC's commands and capabilities. This article is a brief summary of those additions.

All of the changes described below (as well as the rest of z/XDC) can be used both in classic z/XDC and when analyzing dumps via our dump/XDC Licensed Feature. 

For a complete index of all changes, see HELP MAINTENANCE.

Also, updated versions of the z/XDC Manuals have been published. You can find them under the Support Menu.

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