Re: [rvm-research] Runtime Exception with JMX

Hi,

I imported the latest changes and I am still getting the same error.
My code is inside the RVMThread class inside the yieldpoint method.

        if(!t.isSystemThread()) {
                ThreadMXBean tMXB = ManagementFactory.getThreadMXBean();
                long tid = t.getId();
                ThreadInfo tInfo = tMXB.getThreadInfo(tid,0);
                if(tInfo!=null) {
                        tInfo.getBlockedCount();
                        tInfo.getBlockedTime();
                        tInfo.getLockedMonitors();
                        tInfo.getLockedSynchronizers();
                }
        }

If I do not call JMX, not exception happens.

On Wed, Jun 27, 2018 at 11:45 AM, Erik Brangs <[email protected]> wrote:

> Hi,
>
> On 27.06.2018 10:14, Khaled Z Mahmoud wrote:
> > When I tried the following:
> >         ThreadMXBean tMXB = ManagementFactory.getThreadMXBean();
> >         long tid = Thread.currentThread().getId();
> >         ThreadInfo tInfo = tMXB.getThreadInfo(tid);
> >
> > I get the bellow error:
> >
> > JikesRVM: Failing instruction starting at 0 wasn't in RVM address space
> > JikesRVM: unexpected hardware trap outside of RVM address space - (nil)
> 0x6800810c
> > fault address (nil)
> > eip           (nil)
> > eax (T0)      (nil)
> > [...]
> > Any ideas ?
>
> It could be a bug in the JMX implementation. I wasn't able to reproduce it
> but I've pushed a fix for another issue. The implementation threw an
> exception for invalid ids instead of returning null.
>
> Are you trying to get information about SystemThreads? Our implementation
> currently doesn't provide any info about them so tInfo would be null in
> that case.
>
>
> Kind regards,
>
> Erik Brangs
>
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-- 
Regards,
Khaled Mahmoud

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