Linux signals

[David Holmes]

Hi Walt,

On 8/01/2021 7:18 am, Walt Drummond wrote:
> Hi --
> 
> I'm chasing down some information about how the JVM interacts with
> signals on Linux.  Specifically I need to understand if any of the
> Java runtime attempts to directly inspect the system stack when in a
> POSIX signal handler.  My survey of the code doesn't seem to show any
> such uses, and in fact it looks like the JVM relies only on the POSIX
> signals API but I figured I'd ask the experts for confirmation.

I'm not quite sure what you are asking with regards to the "system 
stack". The hotspot signal handler does a range of things to try and 
determine what the signal might mean - e.g. whether it is a true error 
or an internal use of signals that we can recover from. That may involve 
examining the thread stack.

Cheers,
David
-----

> Thanks.
> --Walt
>