PK56599: FRXIVSM0 CSECT FRXDSWT$ X'278' ON A COMPARE AND SWAP INSTRUCTION

APAR status

• Closed as program error.

Error description

• ABEND0C6 FRXIVSM0 CSECT FRXDSWT$ X'278' ON A COMPARE AND SWAP
  INSTRUCTION.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All the uses of IMS DRF version 3 might be   *
  *                 affected.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: DRF abend S0C6 in module FRXIVSM0       *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  The PL/x compiler generates incorrect storage alignment for
  variables with the FIXED(64) attribute.  This caused incorrect
  alignment for an adjacently declared variables used as operands
  of a Compare Double and Swap and Compare and Swap instructions,
  which resulted in a S0C6 specification Exceptions. The operands
  are dynamically allocated and so depending on the allocation
  address they may or may not have ended up on the correct
  boundary,thus the S0C6 is intermittent.
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    GEN:
  
  *** END IMS KEYWORDS ***
  FRXIVSM0 has been changed:
  The FIXED(64) attribute of the variable was changed to BIT(64)
  so that the compiler generates the correct alignment.  The PL/x
  compiler will be changed to correct the incorrect alignment.
  There are no remaining DRF variables with the FIXED(64)
  attribute.
  

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:

  UK32536

Modules/Macros

• FRXIAUX  FRXIOCN0 FRXIOSM0 FRXIVCN0 FRXIVSM0
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R310 PSY UK32536

     UP07/12/22 P F712