Re: [Sablevm-developer] question about _svmf_stop_the_world()

[Archie C. <ar...@de...>]

Archie Cobbs wrote:
> Why in _svmf_stop_the_world() do you increase "vm->pending_halt_thread_count"
> for threads in state SVM_THREAD_STATUS_RUNNING_JAVA threads but not for
> threads in state SVM_THREAD_STATUS_NOT_RUNNING_JAVA_RESUMING_ALLOWED?

Ah.. now I think I see it..

It's because a thread's Java stack and its list of local native
references (in fact, it's total Java state) cannot change while
executing native code outside of libsablevm, because all JNI calls
that would permit such a thread to modify its Java state begin with
"_svmf_resuming_java()". So we can assume such threads are "halted"
even if they're still executing.. and if they attempt to cross back
into 'JAVA' mode they will see that resuming is disabled and then
they will halt.

Does this sound correct?

Thanks,
-Archie

__________________________________________________________________________
Archie Cobbs     *     Precision I/O      *     http://www.precisionio.com