RFR: 8262952: [macos_aarch64] os::commit_memory failure [v3]

[Gerard Ziemski]

On Wed, 12 May 2021 14:45:42 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> On x86_64 macOS the following sequence works just fine:
>> 
>> attempt_reserve_memory_at(executable=false)
>> commit_memory(executable=true)
>> 
>> however, on aarch64 macOS it fails.
>> 
>> We fix the test itself to explicitly ask for executable memory when reserving it since it later commits it as executable.
>
> Gerard Ziemski has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use the existing executable flag to indicate whether we want to commit exec memory or not

@theRealAph Could you please sign off on this change if you are OK with my change incorporating your feedback?

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PR: https://git.openjdk.java.net/jdk/pull/3865