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Re: NPE in parser->getDOMImplementation() with CNI
- From: Andrew Haley <aph at redhat dot com>
- To: Sam Ruby <rubys at intertwingly dot net>
- Cc: java at gcc dot gnu dot org
- Date: Sun, 21 Jun 2009 16:46:41 +0100
- Subject: Re: NPE in parser->getDOMImplementation() with CNI
- References: <4A3D95F1.6040803@intertwingly.net>
Sam Ruby wrote:
> I'm trying to develop a JAXP implementation using CNI, but I get a
> NullPointerException when I try to get a DOMImplementation. I've
> attached a small script (tested on Ubuntu 9.04) which demonstrates the
> problem.
>
> Any help would be appreciated.
Congratulations on this excellent test case. Next time I want to tell
people how to do it right, I'll point them at your posting.
However, I get
$ sh ~/testdomimpl.sh
gnu.xml.dom.DomDocumentBuilderFactory@160ecdad
gnu.xml.dom.DomDocumentBuilder@15ffbc45
gnu.xml.dom.DomImpl@15ef0ee5
gnu.xml.dom.DomDocumentBuilderFactory@2df0bea7
gnu.xml.dom.DomDocumentBuilder@2de03d5f
gnu.xml.dom.DomImpl@2dd0bfdf
$ gcj --version
gcj (GCC) 4.4.0 20090307 (Red Hat 4.4.0-0.23)
Please compile everything -fpic. IF you don't you can end up with copy
relocs for come classes. You can compare nm --demangle ./testdomimpl2
with and without -fpic to see the effect of this.
I'm not sure what might be causing the problem you're seeing. I guess it
must be because something isn't initialized, but I can't reproduce the
problem here.
Andrew.