RFR: JDK-8293493: Signal Handlers printout should show signal block state

[David Holmes]

On Wed, 7 Sep 2022 14:51:27 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> I needed this recently. We print out the signal block mask, which is fine, but more interesting would be the existing block state at the point of the crash/assertion.

This seems okay though may be of limited use if the crash is from a signal as IIRC that in itself will result in various signals getting blocked whilst we remain in the signal-handler context.

Thanks.

src/hotspot/os/posix/signals_posix.cpp line 1418:

> 1416: 
> 1417:   sigset_t thread_sig_mask;
> 1418:   if (::pthread_sigmask(/* ignored */ SIG_BLOCK, NULL, &thread_sig_mask) == 0) {

Nit: no need for `::` scoping (there is one other existing unnecessary use as well you could remove :) ).

-------------

Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10199