Re: [libvirt] Libvir JNA report SIGSEGV
Hi,
The problem is located. The root cause is that esxConnectToHost/esxConnectToVCenter
method defined in esx_driver.c will collect the username and password. JNA will allocate
the memory for username and password. But esxConnectToHost/esxConnectToVCenter will free
the memory allocated by Java as following defined in
esxConnectToHost/esxConnectToVCenter:
VIR_FREE(username);
VIR_FREE(unescapedPassword);
When JVM run the GC, it will crash because of dual free. If I comment these two lines, the
system works well. But I think this is not a good solution. What about your opinion?
B.R.
Benjamin Wang
-----Original Message-----
From: Benjamin Wang (gendwang)
Sent: 2012年9月6日 21:43
To: 'veillard(a)redhat.com'
Cc: libvir-list(a)redhat.com
Subject: RE: [libvirt] Libvir JNA report SIGSEGV
Hi,
I have looked into the code for several days. But I didn't find the root cause.
Because even if I only call "new Connect", the problem will occur. So this
should be related to Connect.java or ConnectAuthDefault.java. Would you take a quick at
the issue and give some prompt?
Then I can try to fix this. Thanks!
B.R.
Benjamin Wang
-----Original Message-----
From: Daniel Veillard [mailto:veillard@redhat.com]
Sent: 2012年9月6日 19:05
To: Benjamin Wang (gendwang)
Cc: libvir-list(a)redhat.com
Subject: Re: [libvirt] Libvir JNA report SIGSEGV
On Thu, Sep 06, 2012 at 09:06:14AM +0000, Benjamin Wang (gendwang) wrote:
Hi,
Actually I also did another test as following. When I comment the
"new Connet", the program works well. So this is the problem related
to Libvirt JNA. If I manually run the garbage collection for this program, it still works
well. But if I run the garbage collection for the last problem, It will crash. I guess
this problem is caused by ConnectAuth callback. When garbage collection is executed, the
callback memory is moved.
Okay, maybe some memory need to be pinned in some ways, I take patches !
Daniel
--
Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
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