Cores when using XercesDOMParser::getSrcOffset()
------------------------------------------------
Key: XERCESC-1364
URL: http://issues.apache.org/jira/browse/XERCESC-1364
Project: Xerces-C++
Type: Bug
Components: DOM
Versions: 2.6.0
Environment: Solaris 2.8, Ultra 5, gcc 3.3.2
Reporter: Bob Freitas
I want to do some additional checking on the info in the XML document, so
naturally I am going to need to communicate to the end-user. I was planning on
using the getSrcOffset() method to get an idea of where I was parsing in the
XML. Unfortunately, the getSrcOffset() just cores when I try to use it.
Here is more or less what I am doing in my code. I had to cut and paste from a
bunch of different objects to get it in one place. I tried to include
everything pertinent:
// in the header file
xercesc::XercesDOMParser* parser;
xercesc::DOMDocument* doc;
DOMParseErrorHandler* saxErrorHandler; // home grown object
typedef vector<xercesc::DOMNode*> ElementCollection;
// basic flow of program, only in mine spread over multiple objects
parser = new xercesc::XercesDOMParser();
saxErrorHandler = new DOMParseErrorHandler();
parser->setErrorHandler(saxErrorHandler);
parser->setCalculateSrcOfs(true);
... do a bunch of my own stuff
const char* fileName; // gets received as a parameter
try
{
parser->parse( fileName );
}
catch (const xercesc::XMLException& e)
{
... do a whole bunch of catches and stuff here
}
doc = parser->getDocument();
xercesc::DOMElement* root = doc->getDocumentElement();
ElementCollection eleColl;
if ( !getChildren(doc, root, &eleColl) )
{
return DOM_TREE_NO_READ; // defined in a separate enum
}
ElementCollection::iterator nodeIter;
ElementCollection::iterator nodeIterEnd = eleColl.end();
for(nodeIter = eleColl.begin(); nodeIter != nodeIterEnd; ++nodeIter)
{
xercesc::DOMNode* node = *nodeIter;
xercesc::DOMElement* ele = (xercesc::DOMElement*)node;
const XMLCh* nodeName = ele->getNodeName();
... look for my XML tags of interest and process them
unsigned int offset = parser->getSrcOffset();
// cores on the above statement, see below for gdb trace
}
bool getChildren(xercesc::DOMDocument* doc,
xercesc::DOMElement* parent, ElementCollection* eleColl)
{
if ( doc == NULL )
{
Log(ERROR, ("Unable to read DOM tree, doc is empty");
return false;
}
if ( parent == NULL )
{
Log(ERROR, (char*)"Unable to read DOM tree, parent element is empty");
return false;
}
assert( eleColl != NULL );
xercesc::DOMTreeWalker* walker = doc->createTreeWalker(parent,
xercesc::DOMNodeFilter::SHOW_ELEMENT, NULL, true);
if ( walker == NULL )
{
Log(ERROR, (char*)"Unable to read DOM tree, error creating tree walker");
return false;
}
xercesc::DOMNode* node;
if ( ( node=walker->firstChild() ) != NULL )
{
while ( node != NULL )
{
eleColl->push_back(node);
node = walker->nextSibling();
}
}
if ( walker != NULL )
{
walker->release();
}
return true;
}
------------------------------------
gdb trace after core:
(gdb) bt 10
#0 xercesc_2_6::XMLString::replicate(char const*, xercesc_2_6::MemoryManager*)
(toRep=0xfef44320 "XMLReader.cpp", manager=0x82100008) at XMLString.cpp:511
#1 0xfee0dabc in xercesc_2_6::XMLException::XMLException(char const*,
unsigned, xercesc_2_6::MemoryManager*) (this=0x6f8d0,
srcFile=0xfef44320 "XMLReader.cpp", srcLine=400, memoryManager=0x82100008)
at XMLException.cpp:146
#2 0xfee14288 in xercesc_2_6::XMLReader::getSrcOffset() const (this=0x6f8d0)
at /tmp/xerces-c-src_2_6_0/include/xercesc/util/RuntimeException.hpp:30
Current language: auto; currently c++
(gdb) quit
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