IZ77484: BAD C++ STABSTRING

September 2010 PTF for XL C for AIX, V11.1
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January 2012 PTF for XL C for AIX, V11.1
January 2012 PTF for XL C/C++ for AIX, V11.1
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April 2012 PTF for XL C/C++ for AIX, V11.1
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February 2013 PTF for XL C for AIX, V11.1
February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
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XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
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XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C for AIX Fix Pack 24 (September 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1
January 2011 PTF for XL C for AIX, V11.1
August 2011 PTF for XL C for AIX, V11.1
November 2011 PTF for XL C for AIX, V11.1
July 2012 PTF for XL C for AIX, V11.1
XL C for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C for AIX Fix Pack 22 (September 2015 PTF) for 11.1

APAR status

• Closed as program error.

Error description

• When running dbx on the code below, dbx crashes due to the
  incorrect generation of a stab string.
  
  The following shows the stab string that is produced for
  class 'd'
  
  [132] m 0x00000000 debug 0 decl
  d:T3=Y8ci805581560:4(i:d1:-1,32,32;u[ci:__ct__1dFv:16;;
  
  _______________________________
  Test Case:
  ----------
  
  class a
  {
    private:
      int a1;
  
    public:
      a(){ a1=1; }
  };
  
  class d : private a
  {
    private:
      int d1;
  
    public:
      d(){ d1=1; }
  };
  
  static int dummy = 0;
  int foo( int parm )
  {
     d bar = *(new d);
     dummy++;
     return 7;
  }
  
  int main(void)
  {
     int arg = 4;
     int result = foo( arg );
  }
  _______________________________
  
  Actual Output:
  --------------
  [1] stop in foo(int)
  [1] stopped in foo(int) at line 22
     22      d bar = *(new d);
  stopped in foo(int) at line 23
     23      dummy++;
  internal error: stack overflow at line 1588 in file
  cplusplus.c
  internal error: stack overflow at line 1546 in file
  cplusplus.c
      a:(internal error: stack overflow at line 2106 in file
  cplusplus.c
  a1 = internal error: stack overflow at line 6270 in file
  eval.c
  ./testcase-1[56]: 1220624 Segmentation fault(coredump)
  
  Expected Output:
  ----------------
  [1] stop in foo(int)
  [1] stopped in foo(int) at line 21
     21   {
  stopped in foo(int) at line 22
     22      d bar = *(new d);
      a:(a1 = 0)
  (d1 = -559038737)
  

Local fix

• N/A
  

Problem summary

• PROBLEM DESCRIPTION:
  Uninitalised variable in Tobey
  
  USERS AFFECTED:
  Potetnially any one using -g (stabs)
  

Problem conclusion

• Fix
  

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:

  LI75807

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5724X1200

Applicable component levels