Hi All,
In the process of building the Xerces-P-2.6 release, I ran across a
bizarre memory leak. After trying everything I could think of, I
tested a straight C++ example and it seems to leak like a seive.
I have read the memory management code in the programming docs about
12 times, and even when I to what it says, I get the leak.
According to the docs:
Users must call the release() function when finished using any
objects that were created by the DOMImplementation::createXXXX
(e.g. DOMBuilder, DOMWriter, DOMDocument, DOMDocumentType).
So here is the code:
XMLCh xfoo[] = {chLatin_f, chLatin_o, chLatin_o, chNull};
DOMImplementation* impl =
DOMImplementationRegistry::getDOMImplementation(X("Core"));
while (1)
{
try
{
DOMDocumentType* dt = impl->createDocumentType(xfoo,xfoo,xfoo);
dt->release();
}
catch (...)
{
XERCES_STD_QUALIFIER cerr << "An error occurred creating the
document" << XERCES_STD_QUALIFIER endl;
errorCode = 3;
}
}
But this leaks.
Replacing 'dt->release()' with 'delete dt' has no affect.
The docs also say:
When a DOMDocumentType has been inserted into a DOMDocument and thus
has a owner, it will then be released automatically when its owner
document is released.
So I added:
DOMDocument* doc = impl->createDocument(0,xfoo,dt);
doc->release();
in place of the 'dt->release()' but this had no affect.
However, removing the creation of the DocumentType and calling:
DOMDocument* doc = impl->createDocument(0,xfoo,0);
doc->release();
Does *not* leak.
Is this a real leak or am I missing something? How is one supposed to
deal with DOMDocumentType memory?
Thanks,
jas.
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