[xml] libxml2 memory leak problem

[Amar Pol <amarpol1305 gmail com>]

Hi,

i m using libxml2.7.3 to parse the xml data from buffer by using  doc = xmlParseMemory(s.ptr, s.len); 

this is resulting in a memory leak, is there any fix on this issue.

I found that xmlFetProp function returns malloced string and we have to explicitly free the memory. but this is not working too. I have tried malloc_trim(0) also.

please provide me some help on this issue.

here is the sample code i m using to parse the xml data.

 doc = xmlParseMemory(s.ptr, s.len);

if(doc != 0)
                {
                        for(    nodeLevel1 = doc->children;
                                nodeLevel1 != NULL;
                                nodeLevel1 = nodeLevel1->next)
                        {
                                i = 0; /*initialising counter to zero*/
                                #ifdef GPS_DEVICE
                                Trip.LocationCount = 0;
                                Trip.TripCount = 0;
                                #endif

                                abd_syslog(LOG_DEBUG,"\nMain node entry xml\n");
                                for(    nodeLevel2 = nodeLevel1->children;
                                        nodeLevel2 != NULL;
                                        nodeLevel2 = nodeLevel2->next)
                                {
                                

                                        
                                             
                                                                for(    nodeLevel3 = nodeLevel2->children;
                                                                        nodeLevel3 != NULL;
                                                                        nodeLevel3 = nodeLevel3->next)
                                                                {
                                                                        variable_name = (xmlChar *) "val";
                                                                        if(xmlHasProp(nodeLevel3,variable_name ) )
                                                                        {
                                                                                value=xmlGetProp(nodeLevel3,variable_name);
                                                                                return_val = atoi((char * )value);
                                                                                xmlFree(value);

                                                                        }
                                                                        variable_name = (xmlChar *) "employee_id";
                                                                        if(xmlHasProp(nodeLevel3,variable_name ) )
                                                                        {
                                                                                value=xmlGetProp(nodeLevel3,variable_name);
                                                                                emp.emp_id[i] = atoi((char * )value);
                                                                                xmlFree(value);
                                                                        }
                                                                }
                                                                i++; /*incrementing the row count*/
                                                                //abd_syslog(LOG_DEBUG,"\n count of row %ld\n",i);
                                      
                   } 
                  }                                                        

         }
                xmlFreeDoc(doc);
                xmlCleanupParser();
                malloc_trim(0);


-- 
Regards&Thanks
Amar Pol
Software Engineer