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.

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.

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

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.

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...

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.

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!

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.

LIST  PC# is a new command that emits either summary lists or detailed displays of PC routines. The summary lists can show:

• PCs available to a given aspace
• PCs resident in a given aspace
• PCs defined by the System Function Table (SFT)
• PCs that are global to all aspaces (in addition to the SFT routines)
• PCs that are private to particular aspaces
• PCs that match a range or list of specific numbers 

Throughout the past year our friend Kevin Pintar of Imperva has been kind enough to help us in beta testing our newest XDC feature: dump/XDC. Kevin and his colleagues have been invaluable in helping us test and polish dump/XDC and he had the following to say about the product.