RFR: 8252324: Signal related code should be shared among POSIX platforms

[Thomas Stuefe]

On Tue, 6 Oct 2020 01:52:21 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Note that these changes are not important enough to rerun testing for this cleanup, so you can make it a new RFE.
>> Thank you for doing consolidation!
>
> In reply to Coleen's query - SR_signum is referenced from the os_*.cpp files so needs to be in the header file now.

I wondered why this is not const then I saw that it can be overwritten with an environment variable "_JAVA_SR_SIGNUM".
Is this still needed? Seems to be an odd way of specifying a VM parameter. And it seems to be untested (I did not find
any tests for that in the open codebase).

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

PR: https://git.openjdk.java.net/jdk/pull/497