>>>>> "BW" == Benjamin Wang (gendwang) <gendwang@xxxxxxxxx> writes:
BW> Hi, When I changed code as following:
BW> public class Connect {
BW> // Load the native part
BW> static {
BW> Libvirt.INSTANCE.virInitialize();
BW> try {
BW> ErrorHandler.processError(Libvirt.INSTANCE);
BW> } catch (Exception e) {
BW> e.printStackTrace();
BW> }
BW> + Libvirt.INSTANCE.virSetErrorFunc(null, new
BW> ErrorCallback());
BW> }
BW> The problem was caused that when JNA call setErrorFunc, it
BW> will create ErrorCallback object. But when GC is executed, the
BW> object is GCed.
Yes, that's why you should keep a reference to the object around.
BW> But even I change code as following.
BW> When GC is excuted, the callback object will be moved. Then C
BW> can’t find this object. Both of scenarios will cause core
BW> dump. It seems that JNA mustn’t provide ErrorCallback Class,
First off, JNA does not provide this class, it is provided by the
libvirt-java wrapper.
Which version of JNA did you use? As I said in a previous mail, I had
crashes with JNA < 3.4.2. Consequently, I cannot reproduce the crash
using your code, JNA 3.4.2 and with having this series
(https://www.redhat.com/archives/libvir-list/2012-October/msg00578.html)
applied. (at least patch #15 is needed when using JNA 3.4.2)
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