Application crash on IBM AIX 5.2

[Thanvir]

We have an application that runs under Linux, solaris. The Application
was developed in C++ under linux, it supports both Oracle and Informix
database.

For database connectivity in oracle it uses OTL (Oracle template
library) and for informix it uses ESQL

In all the platforms we use GNU C/C++ compiler for building the
executable( Version >= 3.3.2)

Now we are trying to port this application to IBM AIX 5.2 machine (64
bit machine), it compiles fine, when we run the server for Oracle it
works fine but when we run the same server for informix it crashes
(Signal 11, Segmentation fault).

The crash happens in various places, some time it happens when we
allocate memory for an object using new system call.

Following is the error Output detected by GDB:
Location: When program try to create informix data adaptor (using new)
for second time.
Error with Thread:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1]
0x09000000002d8 94c in _usched_swtch ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
(gdb) where
#0 0x09000000002d8 94c in _usched_swtch ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
#1 0x09000000002d9 19c in _event_wait ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
#2 0x09000000002e4 d54 in _cond_wait_loca l ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
#3 0x09000000002e5 1b4 in _cond_wait ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
#4 0x09000000002d4 b50 in pthread_join ()
from /usr/lib/libpthreads.a(s hr_xpg5_64.o)
#5 0x00000001000b8 074 in CServerThread:: CreateThread (this=<incomple te
type>)
at
/mega/ETL/ETLServer/Server_ORG/Source/ETLUtilities/ETLCommunicatio nInterf
ace/ETLThread/ETLUtilitiesThr ead.cpp:282
#6 0x0000000100001 5dc in main (argc=271486416 , argv=<incomplet e type>)
at /usr/local/include/c++/3.3.2/bits/stl_iterator.h: 602
sometime it happens when application try to connect with informix
database using ESQL connect

Following is the error Output detected by GDB:
Location: When program try to connect to informix database using
informix data adaptor
Error with Thread:
Program received signal SIGSEGV, Segmentation fault.
0x0900000000043 170 in malloc_y () from /usr/lib/libc.a(shr_64.o )
(gdb) where
#0 0x0900000000043 170 in malloc_y () from /usr/lib/libc.a(shr_64.o )
#1 0x0900000000042 93c in malloc_y_heap () from
/usr/lib/libc.a(shr_64.o )
#2 0x0000000100241 990 in ifx_alloc_conn_ user ()
#3 0x000000010012e fe8 in CEsqlDataAdapto r::EsqlConnect (
this=<incomplet e type>, ai_strUserName= 0x1103a78a8 "megaadm",
ai_strPassword= 0x1103a7350 "megaplus",
ai_strConnectSt ring=0x1103a5ca 8 "merkur_net ",
ai_strDatabaseN ame=0x1103a5cf8 "INFSRCREP3 01") at
ETLEsqlDataAdap tor.ec:271
#4 0x0000000100126 25c in CInformixDataAd aptor::Connect
(this=0x1103f04 30,
ai_strUserName= 0x1103a78a8 "megaadm",
ai_strPassword= 0x1103a7350 "megaplus",
ai_strConnectSt ring=0x1103a5ca 8 "merkur_net ",
ai_strDatabaseN ame=0x1103a5cf8 "INFSRCREP3 01")
at ETLInformixData Adaptor.cpp:279
we checked the memory allocation in our program, it is fine (it runs in
Linux, Solaris, SCO and Windows), we also used GNU Malloc library for
compiling the application, still crashs at the same positions

Please let me know if anyone have a clue how to solve this problem.

Thanks in advance.