Is RegisterMap updated?

[David Griffiths]

Had a nice simple little reproduction test, went to try it on Java 9
and... oh no, sun.jvm.hotspot.jdi.SACoreAttachingConnector has
disappeared! Has it gone for good?

Cheers,

David

On Wed, 30 Jan 2019 at 10:38, Andrew Haley <aph at redhat.com> wrote:
>
> On 1/30/19 10:00 AM, David Griffiths wrote:
> > I'm not sure this works though for the frame at the top of the stack.
> > The pushing of the registers that you mention appears to take place in
> > the updateRegisterMap method which is called when getting the sender.
> > At the top of the stack the register will be live and not saved
> > anywhere?
>
> No the pushing of the register happens in generated code.
>
> > Whatever, I'm seeing a NPE caused by a location that has
> > WHERE_IN_REGISTER and a register number of 16 that doesn't have
> > locationValid set in the map. If I modify createStackValue to check
> > valueAddr being null then it avoids the NPE and getLocals then returns
> > all the locals except for the one held in a register (the other ones
> > are on the stack). Not sure what a register number of 16 equates to on
> > x86, is that supposed to correspond to "not set" or something?
>
> You're not helping.  Are you sure you've got an up-to-date HotSpot
> checkout? You're not falling over bug 8217407?
>
> --
> Andrew Haley
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com>
> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671