IT28360: SEGV IN IFX_TH_MUTEX_LOCK WHEN COMPILING WITH "-THREAD"

APAR status

• Closed as program error.

Error description

• sing "-thread" in a simple ESQL/C code fails with a segv in:
  
  
                  $ esql t.ec -thread
                  $ gdb ./a.out
                  GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
                  ...
                  Program received signal SIGSEGV, Segmentation
  fault.
                  __GI___pthread_mutex_lock (mutex=0x0) at
  ../nptl/pthread_mutex_lock.c:67
                  67      ../nptl/pthread_mutex_lock.c: No such
  file or directory.
                  (gdb) where
                  #0  __GI___pthread_mutex_lock (mutex=0x0) at
  ../nptl/pthread_mutex_lock.c:67
                  #1  0x00007ffff74c38c8 in ifx_th_mutex_lock ()
  from /data/informix/IBM/12.10/lib/esql/libthos.so
                  #2  0x00007ffff74c336c in ifxOS_th_mutex_lock ()
  from /data/informix/IBM/12.10/lib/esql/libthos.so
                  #3  0x00007ffff74c3464 in ifxOS_thread_mutexLock
  () from /data/informix/IBM/12.10/lib/esql/libthos.so
                  #4  0x00007ffff7b9209b in asf_init () from
  /data/informix/IBM/12.10/lib/esql/libthsql.so
                  #5  0x00007ffff7b950ea in sqli_connect_open_tcb
  () from /data/informix/IBM/12.10/lib/esql/libthsql.so
                  #6  0x00007ffff7b9596e in sqli_connect_open ()
  from /data/informix/IBM/12.10/lib/esql/libthsql.so
                  #7  0x0000000000400940 in db_init ()
                  #8  0x00000000004009c4 in main ()
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of CSDK prior to 4.10.xC13.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Segmentation Violation in ifx_th_mutext_lock when compiling  *
  * with "-thread" option.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Fixed in CSDK 4.10.xC13.
  

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:

Fix information

• Fixed component name

  IBM CSDK

• Fixed component ID

  5724C2381

Applicable component levels