[xmlsec] Re: [xml] error in moving nodes between documents: heap
veillard at redhat.com
Tue Nov 30 03:20:01 PST 2004
On Tue, Nov 30, 2004 at 12:10:33PM +0100, Tomas Sieger wrote:
> I found a problem in moving document (D1) nodes into another
> document (D2). It seems that the moved nodes still refer to some
> data in the original document D1, so after D1 gets deleted,
> D2 contains invalid nodes. The invalid nodes are revealed e.g.
> when deleting D1 - glibc reports heap corruption.
yes. There is a number of dependancies possibles from a node
to its surroundding document:
- dictionnary for names and short text values
- entities references
Moving nodes between documents is a tricky business.
> The problem appears in libxml2-2.6.15 and newer. libxml2-2.6.14
> does not cause the problem. I've discovered that this commit:
This enforces than nodes from a document always use names from
the document dictionnary. If you want to avoid that, pass the
XML_PARSE_NODICT option to xmlRead... parsing functions.
It is not a bug, it is a property of the documents. You can disable it
but you will loose on performances and memory consumption.
Daniel Veillard | Red Hat Desktop team http://redhat.com/
veillard at redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/
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