[JVMTI] RFA: JVMTI Stack Tracing

[Kyle Galloway]

David Daney wrote:
> Is libc async-signal safe?  What happens if the unwinder cannot 
> produce a stacktrace because the thread was stopped somewhere where 
> there was no unwind info?
>
> Why don't you set SA_RESTART?
>
> Why SIGTRAP?  That will interact poorly with gdb.
>
> David Daney
I should have set, SA_RESTART, I'll change that.  As for SIGTRAP, there 
was no real reason, I could use any of a bunch of different signals, 
maybe SIGPWR would be a better choice?

- Kyle