PH55715: Checkpoint interface builtin PLICKPT causes heap corruption on which the next call to PLICKPT fails

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• PLICKPT allocates a work area from the BELOWHEAP that appears to
  be too short for subsequent use, corrupting heap accounting
  information. A subsequent call to PLICKPT (or really any
  allocation from the BELOWHEAP) can run afoul of this.
  
  Depending on BELOWHEAP use by the application, and the
  application environment as a whole, the problem may not be
  discovered.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Enterprise PL/I users who want to use the    *
  *                 PLICKPT built-in function.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: When PLICKPT is called more than once   *
  *                      there may result an abend0C6 due to     *
  *                      the storage overlay.                    *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF for this APAR.                 *
  ****************************************************************
  This APAR fixes the storage overlay issue for Enterprise PL/I
  runtime when calling PLICKPT built-in function more than once
  in the same program.
  

Problem conclusion

• When the PLICKPT built-in function is called multiple times,
  the PLICKPT built-in function may cause an abend0C6 because
  of the storage being overwritten when writing to the
  Checkpoint restart data set.
  

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:

  UI92978 UI93017

Modules/Macros

• IBMPEV11 IBMPKCPA IBMPKCPU
  

Fix information

• Fixed component name

  LE VA PL/I

• Fixed component ID

  568819806

Applicable component levels

• R7C0 PSY UI92978

     UP23/08/03 P F308

• R7D0 PSY UI93017

     UP23/08/04 P F308

Fix is available

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