Huh? C ‘tee Tran you’ ‘reentrancy’ On Sun, Nov 10, 2019 at 17:26 John Lock <[email protected]> wrote:
> I doubt this is a problem of tee Tran you. > It’s a question of register contents. > > On Sun, Nov 10, 2019 at 17:11 scott Ford <[email protected]> wrote: > >> Guys, >> >> Yeah I found it it happens to be another Well known ISV’s exit. But I have >> a question in regard to when this exit is called it’s like IRREVX01 , so I >> assume (I know ) that the WTO should be re-entrant. We are basically using >> it for diagnostics if needed. Is my assumption correct on the WTO ? >> >> Scott >> >> >> On Sun, Nov 10, 2019 at 3:59 PM Paul Gilmartin < >> [email protected]> wrote: >> >> > On Sun, 10 Nov 2019 09:30:30 -0500, Peter Relson wrote: >> > >> > ><snip> >> > >Yes it's documented and legit, but it's a change in behaviour over the >> > >last few z/OS releases. In IIRC z/OS 1.x, WTO did not clobber AR15, >> > >and STORAGE OBTAIN did not change the high half of R1. >> > ></snip> >> > > >> > >You have no way of knowing if that is true or not. All that you could >> > >possibly say is that you did not encounter such a case. The environment >> > >that could cause such a case might even not have been under your >> control >> > >and might be uncommon. ... >> > > >> > I.e. the user, or even an ISV, was depending on undocumented behavior's >> > remaining unchanged. >> > >> > >The statement is not correct about STORAGE OBTAIN. The high half of R1 >> > has >> > >been changed on STORAGE OBTAIN ever since high halves existed. ... >> > > >> > Does code written at a time before "high halves existed", or perhaps >> even >> > before ARs existed, and depending only on OS behavior documented at >> > such a time, continue to operate correctly? If so, a user has no ground >> > for a complaint. If it fails now, IBM should graciously apologize and >> move >> > on. The pertinent aphorism is, "You can't make an omelet without >> breaking >> > eggs." >> > >> > -- gil >> > >> > ---------------------------------------------------------------------- >> > For IBM-MAIN subscribe / signoff / archive access instructions, >> > send email to [email protected] with the message: INFO IBM-MAIN >> > >> -- >> Scott Ford >> IDMWORKS >> z/OS Development >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN >> > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
