PH35652: IMPROVE COBOL OFFSET REPORT USABILITY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When compiling with OFFSET and OPT(1/2), the offset table is
  currently built with a single entry for each line number, sorted
  by offset.
  
  But the compiler may generate more than one block of
  instructions per verb. As a result, the OFFSET output cannot
  reliably be used to find the verb at a given offset.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IBM Enterprise COBOL 6.3            *
  *                 compiling with compiler options OFFSET and   *
  *                 OPT(1|2).                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: The OFFSET output in the listing        *
  *                      contains a single entry for each COBOL  *
  *                      verb, but the compiler may generate     *
  *                      more than one block of instructions     *
  *                      per verb. The OFFSET output cannot      *
  *                      reliably be used to find the verb at a  *
  *                      given offset.                           *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF                       *
  ****************************************************************
  With OPT(1|2), the compiler may generate more than one block of
  instructions for a COBOL verb. This can happen if that verb is
  in a PERFORMed paragraph that is inlined more than once, or if
  the compiler chooses to interleave instructions from multiple
  statements. The compiler's behaviour is correct and leads to
  better performance, but before this change the OFFSET output
  was  unreliable, as the offset of every instruction for a verb
  other than instructions in the first block will be nearest in
  the OFFSET output to the entry for some other verb.
  

Problem conclusion

• The compiler was changed to put an entry into the OFFSET output
  every time an instruction is generated for a different
  COBOL verb pair than the previous instruction.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  PH36690

Modules/Macros

• IGY8RWTU IGYCASMB IGYCCBE  IGYCCCRT IGYCCICS IGYCCSRV IGYCDGEN
  IGYCDIAG IGYCDMAP IGYCEN$0 IGYCEN$1 IGYCEN$2 IGYCEN$3 IGYCEN$4
  IGYCEN$5 IGYCEN$8 IGYCEN$D IGYCEN$R IGYCFGEN IGYCFREE IGYCINIT
  IGYCJA$0 IGYCJA$1 IGYCJA$2 IGYCJA$3 IGYCJA$4 IGYCJA$5 IGYCJA$8
  IGYCJA$D IGYCJA$R IGYCLIBR IGYCLSTR IGYCLVL0 IGYCLVL1 IGYCLVL2
  IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOB2E IGYCOPI  IGYCOPT  IGYCOSCN
  IGYCPGEN IGYCRCTL IGYCRDPR IGYCRDSC IGYCREAL IGYCRWT  IGYCSCAN
  IGYCSIMD IGYCUE$0 IGYCUE$1 IGYCUE$2 IGYCUE$3 IGYCUE$4 IGYCUE$5
  IGYCUE$8 IGYCUE$D IGYCUE$R IGYCXREF IGYDRV   IGYEQCWI IGYMSGE
  IGYMSGK  IGYMSGT  IGYQCBE  IGYQSPLT IGYZQEN6 IGYZQENU IGYZQJP6
  IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R630 PSY UI74566

     UP21/03/30 P F103

• R631 PSY UI74567

     UP21/03/30 P F103

• R632 PSY UI74568

     UP21/03/30 P F103

• R63H PSY UI74569

     UP21/03/30 P F103

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.