|
Hi According to DOM specification (2.0) an
entity reference node can have following nodes as its child “Element, ProcessingInstruction, Comment, Text,
CDATASection, EntityReference.” And current Gdome implementation also
allows us to append a child to the entity reference node. Consider the following scenario-
I am creating a document from scratch I create
an entity reference node and add a text node as its child and finally append
that entity reference node to the root element. Now when I will save the
tree to a File it will simply shows an entity reference on the doc. Hence
appending the child has no effect. After the entire Tree is freed there is a
memory leak as the text node appended to the entity is not freed. It’s
because Gdome uses the Libxml function XmlFreeDoc () to free the document tree.
Now inside xmlFreeDoc () xmlFreeNodeList () is called to free the children list
of doc. In side this function the node type is checked before freeing the child
list. If it is of entity reference node then its children are not freed which
causes the memory leak in this scenario. As appending a child node to ER is of no use
can we just make ER node as read-only so that it can’t be modified any
way. Thanks & Regards Rabi |