PH56279: NEW FUNCTION: More flexible allocation of function temporaries via the FUNCTEMP compiler option

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• When using STACK(,,BELOW) due to dynamic calls to AMODE(24)
  modules, allocation of large function temporaries on the stack,
  for example for functions national-of and display-of, can lead
  to storage exhaustion below the line.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL 6.3 compiling and  *
  *                 running programs that invoke intrinsic       *
  *                 functions with an argument that is a         *
  *                 reference modified data item that is large   *
  *                 but where either the length of the reference *
  *                 modification can be determined at            *
  *                 compile-time and is small or it is a varying *
  *                 length reference modification of a PIC X(1)  *
  *                 item defined in the LINKAGE section.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: The program runs out of stack memory at *
  *                      runtime.                                *
  ****************************************************************
  * RECOMMENDATION: Apply the IBM-provided PTF                   *
  ****************************************************************
  When calculating the size of result temps for alphanumeric
  intrinsic functions with reference-modified arguments, the
  maximum size of the reference modified item was being used to
  determine the size of the result temp even when the size of the
  reference modification could be determined at compile-time and
  was much smaller. Furthermore, in the case of PIC X(1) items in
  the LINKAGE section, since those are treated as unbounded items
  by the compiler, when they have a varying length refmod, we
  cannot assume anything about the max length of the underlying
  item, so we should be allocating their result temps dynamically
  at runtime using the exact length of the corresponding reference
  modification in order to avoid problems of allocating too much
  or too little memory.
  

Problem conclusion

• The compiler was updated to use the length of compile-time known
  reference modifications when calculating the size of result
  temps for alphanumeric intrinsic functions, and was also updated
  to handle the result temps for varying length reference
  modifications of PIC X(1) items in the LINKAGE sections using
  dynamic allocation at runtime with the exact length of the
  reference modification in order to avoid using too much or too
  little memory.
  

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:

  UI96119 UI96120 UI96121 PH60940

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 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 UI96119

     UP24/03/28 P F403

• R631 PSY UI96120

     UP24/03/28 P F403

• R632 PSY UI96121

     UP24/03/28 P F403

Fix is available

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