[omniORB] Request for assistance with server side memory leak (omniORB 4.1.3)

[Mark Ferguson]

Hi,


We are seeking advise on how to resolve a server-side memory leak with omniORB 4.1.3

Symptom observed:


- The response buffer allocated by the server is never freed


Seaking advise on:

- What we need to change to ensure that the server does not leak memory


Summary of software used:


- Client (1) implementation omniORB 2.8 (win32)
- Client (2) implementation omniORB 4.1.3 (AIX 5.3)
- Server implementation omniORB 4.1.3 (AIX 5.3)

Note:  Changing the win32 client implementation is not an option at this stage.



IDL Summary:

Service.idl

  long getChildrenList(in string req_data, 
                       in long req_data_len, 
                       out string response_data, 
                       out long response_data_len)
           raises (EInternalError, EGetChildrnListFailed);

ServiceSK.cc

::CORBA::Long _objref_Service::getChildrenList(const char* req_data, ::CORBA::Long req_data_len, ::CORBA::String_out response_data, ::CORBA::Long& response_data_len)



Client side summary:

void * _outBuf;
char * reply;

...
CORBA::Object_var obj = orb->string_to_object(szIOR);
Service_var connVar  = Service::_narrow(obj);
...
{
// the corba system may soon alloc a new output buffer,
// free the current one if it exists
CORBA::string_free((char *) _outBuf);
...
connVar -> getChildrenList ((char *)_inBuf, _inBufSize, reply, outBufSize);
          _outBuf = reply;
...
}


Server side summary:

Service_i.cpp

CORBA::Long  Service_i::getChildrenList (const char  *req_data,
                                         CORBA::Long  req_data_len,
                                         CORBA::String_out response_data,
                                         CORBA::Long  &response_data_len)
{
....
CORBA::Long ret = serverImplGetChildrenList(req_data, req_data_len, response_data, response_data_len, resv );
...
}

ServerImpl.cpp

int serverImplGetChildrenList(  const char * request_data,
                   long request_data_len,
                   char * & response_data, // should this be CORBA::String_var & response_data, or is there more required?
                   long & response_data_len,
                   char* reserved)
{
...
// allocate memory for the response on the heap
response_data = new char [1024000];

// populate the response buffer with data
...
return SUCCESS;
}
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