RFR: 8253795: Implementation of JEP 391: macOS/AArch64 Port [v9]

[Anton Kozlov]

On Mon, 15 Feb 2021 16:21:53 GMT, Bernhard Urban-Forster <burban at openjdk.org> wrote:

>> This is the version of w^x on-demand switch implemented by microsoft guys. This is enabled only for debug builds.
>> @lewurm could you comment here please
>
> Those values can be observed in the debugger, but aren't documented or defined in header files.
> 
> This mode was useful for the initial bootstrap of the platform (it helped with missing W^X transitions), but shouldn't be required anymore today. I'm fine with removing it altogether.

OK, I'm going to remove this block. So we'll be able to revert changes in globals.hpp https://github.com/openjdk/jdk/pull/2200/files#r568986339

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PR: https://git.openjdk.java.net/jdk/pull/2200