RFR: JDK-8255711: Fix and unify hotspot signal handlers [v2]

[Gerard Ziemski]

On Thu, 5 Nov 2020 17:34:58 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Remove unnecessary call-once guard from PosixSignals::install_signal_handlers()
>
> src/hotspot/os_cpu/bsd_x86/os_bsd_x86.cpp line 699:
> 
>> 697: size_t os::Posix::_java_thread_min_stack_allowed = 48 * K;
>> 698: #ifdef _LP64
>> 699: size_t os::Posix::_vm_internal_thread_min_stack_allowed = 64 * K;
> 
> This is not being moved to javaSignalHandler_inner(), so why are we dropping this completely?

I just saw the answer to this in the thread, nvm.

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PR: https://git.openjdk.java.net/jdk/pull/1034