[ 
https://issues.apache.org/jira/browse/XERCESC-2145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Blair Fonville updated XERCESC-2145:
------------------------------------
    Description: 
In a program which reads (parses) an xml file once into a DOMDocument, and then 
accesses the content of the nodes/elements often, through getTextContent(), the 
heap memory builds indefinitely.

For example: 
{code:java}
#include <xercesc/dom/DOM.hpp>

XERCES_CPP_NAMESPACE_USE

int main(int argc, char **argv)
{
   XMLPlatformUtils::Initialize();

   XMLCh tempStr[100];
   XMLString::transcode("LS", tempStr, 99);
   DOMImplementation *impl = 
DOMImplementationRegistry::getDOMImplementation(tempStr);
   DOMLSParser *parser = ((DOMImplementationLS*)impl) ->createLSParser( 
DOMImplementationLS::MODE_SYNCHRONOUS, 0);

   DOMDocument *doc = impl->createDocument(0, 0, 0);
   doc = parser->parseURI("config.xml");

   DOMElement *el = doc->getDocumentElement();

   // Heap blows up here
   while (1) {
      char *cstr = XMLString::transcode(el->getTextContent());
      XMLString::release(&cstr);
   }

   // and/or here
   while (1) {
      XMLCh *xstr = XMLString::replicate(el->getTextContent());
      char *cstr = XMLString::transcode(xstr);
      XMLString::release(&cstr);
      XMLString::release(&xstr);
   }
}

{code}

  was:
When using Xerces-C++ in a program, which reads (parses) an xml file once into 
a DOMDocument, and then accesses the DOMDocument's nodes/elements often through 
getTextContent(), the heap memory builds indefinitely.

For example: 
{code:java}
#include <xercesc/dom/DOM.hpp>

XERCES_CPP_NAMESPACE_USE

int main(int argc, char **argv)
{
   XMLPlatformUtils::Initialize();

   XMLCh tempStr[100];
   XMLString::transcode("LS", tempStr, 99);
   DOMImplementation *impl = 
DOMImplementationRegistry::getDOMImplementation(tempStr);
   DOMLSParser *parser = ((DOMImplementationLS*)impl) ->createLSParser( 
DOMImplementationLS::MODE_SYNCHRONOUS, 0);

   DOMDocument *doc = impl->createDocument(0, 0, 0);
   doc = parser->parseURI("config.xml");

   DOMElement *el = doc->getDocumentElement();

   // Heap blows up here
   while (1) {
      char *cstr = XMLString::transcode(el->getTextContent());
      XMLString::release(&cstr);
   }

   // and/or here
   while (1) {
      XMLCh *xstr = XMLString::replicate(el->getTextContent());
      char *cstr = XMLString::transcode(xstr);
      XMLString::release(&cstr);
      XMLString::release(&xstr);
   }
}

{code}


> indefinite memory allocations using DOMNode::getTextContent()
> -------------------------------------------------------------
>
>                 Key: XERCESC-2145
>                 URL: https://issues.apache.org/jira/browse/XERCESC-2145
>             Project: Xerces-C++
>          Issue Type: Bug
>          Components: DOM
>    Affects Versions: 3.1.2, 3.2.1
>         Environment: Windows 10, Visual Studio 2017
>            Reporter: Blair Fonville
>            Priority: Major
>         Attachments: config.xml, main.cpp
>
>
> In a program which reads (parses) an xml file once into a DOMDocument, and 
> then accesses the content of the nodes/elements often, through 
> getTextContent(), the heap memory builds indefinitely.
> For example: 
> {code:java}
> #include <xercesc/dom/DOM.hpp>
> XERCES_CPP_NAMESPACE_USE
> int main(int argc, char **argv)
> {
>    XMLPlatformUtils::Initialize();
>    XMLCh tempStr[100];
>    XMLString::transcode("LS", tempStr, 99);
>    DOMImplementation *impl = 
> DOMImplementationRegistry::getDOMImplementation(tempStr);
>    DOMLSParser *parser = ((DOMImplementationLS*)impl) ->createLSParser( 
> DOMImplementationLS::MODE_SYNCHRONOUS, 0);
>    DOMDocument *doc = impl->createDocument(0, 0, 0);
>    doc = parser->parseURI("config.xml");
>    DOMElement *el = doc->getDocumentElement();
>    // Heap blows up here
>    while (1) {
>       char *cstr = XMLString::transcode(el->getTextContent());
>       XMLString::release(&cstr);
>    }
>    // and/or here
>    while (1) {
>       XMLCh *xstr = XMLString::replicate(el->getTextContent());
>       char *cstr = XMLString::transcode(xstr);
>       XMLString::release(&cstr);
>       XMLString::release(&xstr);
>    }
> }
> {code}



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