IV85634: BINARY SEGFAULT WHEN COMPILED WITH IPA/PDF

XL C for AIX Fix Pack 2 (July 2016 PTF) for 13.1.3
XL C/C++ for AIX Fix Pack 2 (July 2016 PTF) for 13.1.3
XL C for AIX, V13.1.3.3 Fix Pack (December 2016)
XL C/C++ for AIX, V13.1.3.3 Fix Pack (December 2016)
XL C for AIX, V13.1.3.4 Fix Pack (April 2017)
XL C/C++ for AIX, V13.1.3.4 Fix Pack (April 2017)
XL C for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C/C++ for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C for AIX, V13.1.3.6 Fix Pack (May 2019)
XL C/C++ for AIX, V13.1.3.6 Fix Pack (May 2019)

APAR status

• Closed as program error.

Error description

• When compiling a large application with IPA/PDF, the following
  segfault could be experienced:
  
  
  Segmentation fault in DbCursorExternalAbs::__dftbdt() at
  0x1009e2308 ($t1)
  0x1009e2308 (DbCursorExternalAbs::__dftbdt()+0x8) f8030000
  std   r0,0x0(r3)
  
  The stack looks like this:
  
  DbCursorExternalAbs::__dftbdt()(??) at 0x1009e2308
  invokedtr.__Invoke__Destructor() at 0x9000000302ce160
  __DoThrowV6() at 0x9000000302d0178
  dynpen00(??) at 0x100fe972c
  .
  .
  .
  main()
  
  ===== ACTUAL OUTPUT:
  Segfault at runtime
  
  ===== EXPECTED OUTPUT:
  Should run to completion
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users of -qipa=level=0 (and up) with exception handling in
  their code may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  Abend in C++ exception handling runtime during user program
  execution may occur.  This is due to an
  oversight in fix-up code after inlining an EH-aware function
  into a non-EH-aware function.
  

Problem conclusion

• The compiler issue has been resolved by adding logic to fix-up
  code after inlining to take into account non-zero exception
  states.
  

Temporary fix

Comments

APAR Information

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

  IV85274

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

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RD13 PSY

     UP