RFR: 8254158: Consolidate per-platform stack overflow handling code

Tue Oct 13 20:43:15 UTC 2020

On Tue, 13 Oct 2020 19:38:18 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

>> Moved the duplicated code from posix based platform/cpu combinations into os_posix.cpp.  Left a little function to
>> determine frame at stack banging point for compiled methods (you can suggest a better name for it) to capture the
>> difference.  There are a bit of ifdefs but now there are less copies.
>> 
>> Tested with tier1-3 and stack overflow tests in vmTestbase/nsk/stress/stack on
>> linux-x86-debug,macosx-x86-debug,windows-x86-debug.  Built aarch64, arm32, ppc, s390, and zero.  Testing on these
>> platforms would be welcome.  Thanks,
>> Coleen
>
> The changes look good.  Thanks for consolidating this code.

Thanks Fred and Harold.

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PR: https://git.openjdk.java.net/jdk/pull/620