[
https://issues.apache.org/jira/browse/XERCESC-1451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901912#action_12901912
]
Daniel Pinyol commented on XERCESC-1451:
----------------------------------------
I have the same problem running the code of listing1 in
http://www.ibm.com/developerworks/xml/library/x-serial.html
I only replaced the parse line with
xercesc::DOMNode *aDOMNode = (xercesc::DOMNode*)
myParser->parse("theXMLFile.xml")->getDocumentElement();
and added a loop to be able to call writeTostring several times.
valgrind reports an error (in both xerces 2.7 & 2.8), but only on the first
call to writeToString :
Probably a bug in xerces initialization
==17266== Mismatched free() / delete / delete []
==17266== at 0x40244D3: operator delete[](void*)
(vg_replace_malloc.c:409)
==17266== by 0x42C0347: xercesc_2_8::XMLString::release(unsigned
short**) (in /usr/lib/libxerces-c.so.28.0)
==17266== by 0x8048BE0: main (in
/home/dani/svn/sandbox/src/common/xerces/a.out)
==17266== Address 0x581f9e8 is 0 bytes inside a block of size 46 alloc'd
==17266== at 0x402569A: operator new(unsigned int)
(vg_replace_malloc.c:255)
==17266== by 0x42091CC:
xercesc_2_8::MemoryManagerImpl::allocate(unsigned int) (in
/usr/lib/libxerces-c.so.28.0)
==17266== by 0x41B0820:
xercesc_2_8::DOMWriterImpl::writeToString(xercesc_2_8::DOMNode const&) (in
/usr/lib/libxerces-c.so.28.0)
==17266== by 0x8048BD0: main (in
/home/dani/svn/sandbox/src/common/xerces/a.out)
#include <xercesc/dom/DOMNodeList.hpp>
#include <xercesc/dom/DOMNamedNodeMap.hpp>
#include <xercesc/dom/DOMComment.hpp>
#include <xercesc/dom/DOMText.hpp>
#include <xercesc/dom/DOMImplementation.hpp>
#include <xercesc/dom/DOMImplementationRegistry.hpp>
#include <xercesc/dom/DOMBuilder.hpp>
#include <xercesc/dom/DOMWriter.hpp>
#include <xercesc/dom/DOMError.hpp>
#include <xercesc/dom/DOMErrorHandler.hpp>
#include <xercesc/dom/DOMDocument.hpp>
#include <xercesc/dom/DOMLocator.hpp>
#include <xercesc/sax/SAXException.hpp>
#include <xercesc/framework/Wrapper4InputSource.hpp>
#include <xercesc/framework/MemBufInputSource.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/PlatformUtils.hpp>
#include <stdlib.h>
using namespace xercesc;
int main(int argc, char **argv)
{
xercesc::XMLPlatformUtils::Initialize(0,0,0,0, true);
// DOMImplementationLS contains factory methods for creating objects
// that implement the DOMBuilder and the DOMWriter interfaces
static const XMLCh gLS[] = { chLatin_L, chLatin_S, chNull };
DOMImplementation *impl =
DOMImplementationRegistry::getDOMImplementation(gLS);
// construct the DOMBuilder
DOMBuilder* myParser = ((DOMImplementationLS*)impl)->
createDOMBuilder(DOMImplementationLS::MODE_SYNCHRONOUS, 0);
// parse the XML data, assume it is saved in a local file
// called "theXMLFile.xml"
// the DOMBuilder will parse the data and return it as a DOM tree
xercesc::DOMNode *aDOMNode = (xercesc::DOMNode*)
myParser->parseURI("theXMLFile.xml")->getDocumentElement();
//DOMNode* aDOMNode = myParser->parseURI("theXMLFile.xml");
// construct the DOMWriter
DOMWriter* myWriter = ((DOMImplementationLS*)impl)->createDOMWriter();
// optionally, set some DOMWriter features
// set the format-pretty-print feature
if (myWriter->canSetFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true))
myWriter->setFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true);
// set the byte-order-mark feature
if (myWriter->canSetFeature(XMLUni::fgDOMWRTBOM, true))
myWriter->setFeature(XMLUni::fgDOMWRTBOM, true);
int times =1;
if (argc > 1)
times= atoi(argv[1]);
// serialize the DOMNode to a UTF-16 string
for (int i=0; i < times; i++)
{
XMLCh* theXMLString_Unicode = myWriter->writeToString(*aDOMNode);
// release the memory
XMLString::release(&theXMLString_Unicode);
}
myWriter->release();
myParser->release();
xercesc::XMLPlatformUtils::Terminate();
}
> Valgrind reports mismatched new/delete[] usage
> ----------------------------------------------
>
> Key: XERCESC-1451
> URL: https://issues.apache.org/jira/browse/XERCESC-1451
> Project: Xerces-C++
> Issue Type: Bug
> Affects Versions: 2.5.0, 2.6.0
> Environment: Red Hat 9 (Shrike 2.4.20-6smp), Dell Precision 530
> Valgrind 2.4.0
> g++ 3.2.2
> Reporter: Glenn Miyake
>
> Valgrind reports a mismatch new/delete[]
> MemoryManagerImpl::allocate(unsigned) appears to allocate using just
> new(size).
> This memory is then incorrectly freed using array delete (delete []) in
> XMLString::release.
> Simply changing the release method to call "delete" does not work since it
> appears that release is also used to free memory allocated with new [].
> Partial valgrind output follows:
> ==21267== Mismatched free() / delete / delete []
> ==21267== at 0x1B903D5D: operator delete[](void*) (vg_replace_malloc.c:161)
> ==21267== by 0x1BB0A9EC: xercesc_2_6::XMLString::release(unsigned short**)
> (in /home/gmiyake/dev/xerces-c-src_2_6_0/lib/libxerces-c.so.26.0)
> ==21267== by 0x836BC59:
> altova::CDoc::convertXmlDocToString(altova::CNode&) (Doc.cpp:451)
> ==21267== by 0x836E059: altova::CNode::convertXmlDocToString()
> (Node.cpp:469)
> ==21267== Address 0x1BE20C18 is 0 bytes inside a block of size 3912 alloc'd
> ==21267== at 0x1B9036A6: operator new(unsigned) (vg_replace_malloc.c:132)
> ==21267== by 0x1BA7C51B:
> xercesc_2_6::MemoryManagerImpl::allocate(unsigned) (in
> /home/gmiyake/dev/xerces-c-src_2_6_0/lib/libxerces-c.so.26.0)
> ==21267== by 0x1BA49F0A:
> xercesc_2_6::DOMWriterImpl::writeToString(xercesc_2_6::DOMNode const&) (in
> /home/gmiyake/dev/xerces-c-src_2_6_0/lib/libxerces-c.so.26.0)
> ==21267== by 0x836BC23:
> altova::CDoc::convertXmlDocToString(altova::CNode&) (Doc.cpp:440)
> ==21267== by 0x836E059: altova::CNode::convertXmlDocToString()
> (Node.cpp:469)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
