LI76280: BAD STABSTRING WITH FORTRAN PARAMETER

July 2011 Update for XL Fortran for Linux, V13.1
October 2011 Update for XL Fortran for Linux, V13.1
June 2012 Update for XL Fortran for Linux, V13.1
October 2012 Update for XL Fortran for Linux, V13.1
XL Fortran for Linux Fix Pack 8 (June 2013 Update) for 13.1

APAR status

• Closed as program error.

Error description

• When compiling the scenario test case below with debug
  information (using -g), the compiler is generating an invalid
  stabstring for the RCSid variable.  The disassembly of the
  stabstring reads:
  
    .stabx "rcsid:c=s""TESTBADSTABSTRING""",0x03,0x81,0x0
  
  As a constant object, the stabstring grammar requires a ';' at
  the end of the string:
  
    .stabx "rcsid:c=s""TESTBADSTABSTRING"";",0x03,0x81,0x0
  
  Applications that use object file stabstring debug information
  may encounter problems when parsing the invalid stabstring.  For
  example, the AIX linker's -bstabcmpct:2 feature outputs the
  following error with the -bloadmap option:
  
  ld: 0711-397 STABSTRING ERROR: Symbol table entry 24, object
  file foo.o
          Character ; expected in production Stabstring.
          ASCII 0 seen.
          Remainder of stabstring is:
  
  
     =====  TESTCASE  =====
  program test
  CHARACTER*(*) RCSid
  parameter (RCSid = 'TESTBADSTABSTRING')
  write (*,*) 'TEST'
  stop
  end
  
  
  $ xlf90 -g foo.f -bstabcmpct:2
  ** test   === End of Compilation 1 ===
  1501-510  Compilation successful for file foo.f.
  ld: 0711-395 STABSTRING ERROR in object foo.o
  ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain
  more information.
  ld: 0711-937 SEVERE ERROR: Severe errors have occurred.
  $
  

Local fix

• - Avoid usage of the -bstabcmpct:2 feature
  - Manually edit the object file/disassembly to read the missing
  ';' character
  - Do not use debug information
  

Problem summary

• PROBLEM DESCRIPTION:
  A truncated stabstring is making the linker -bstabcmpct:2
  feature fail.
  
  USERS AFFECTED:
  Users with a string in a parameter statement, compiling with
  stabstring debug information, and using the -bstabcmpct:2 linker
  feature.
  

Problem conclusion

• The stabstring generation was corrected.
  

Temporary fix

Comments

APAR Information

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

  IZ96981

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

Fix information

• Fixed component name

  XL FORTRAN LINU

• Fixed component ID

  5724X1600

Applicable component levels

• RD10 PSY

     UP