Am 10.05.2013 13:09, schrieb Stefan Hajnoczi:
On Fri, May 10, 2013 at 11:07 AM, Stefan Priebe - Profihost AG
<s.pri...@profihost.ag> wrote:
Am 10.05.2013 09:42, schrieb Stefan Hajnoczi:
On Fri, May 10, 2013 at 08:12:39AM +0200, Stefan Priebe - Profihost AG wrote:
3. Either use gdb or an LD_PRELOAD library that catches exit(3) and
_exit(2) and dumps core using abort(3). Make sure core dumps are
enabled.
LD_PRELOAD sounds good can you point me to such a lib?
$ cat /tmp/catchexit.c
#include <unistd.h>
#include <stdlib.h>
void exit(int status)
{
const char msg[] = "*** CAUGHT EXIT, DUMPING CORE ***\n";
write(2, msg, sizeof msg);
abort();
}
void _exit(int status) __attribute__((alias("exit")));
$ gcc -o catchexit.so -shared -fPIC -std=gnu99 catchexit.c
$ LD_PRELOAD=/tmp/catchexit.so x86_64-softmmu/qemu-system-x86_64 -m
1024 -enable-kvm -cpu host -vga asdf
Unknown vga type: asdf
*** CAUGHT EXIT, DUMPING CORE ***
Aborted (core dumped)
Make sure to give the absolute path to catchexit.so. Also keep in
mind that this does not catch a normal return from main() or possibly
other ways of terminating the process.
You can hook more library functions, if necessary.
Stefan
I'm really sorry for bothering you. It turned out to be a host kernel
bug. Without NUMA Balancing turned on (kernel 3.8.13) i see no vm
crashes at all...
Greets,
Stefan
