RFR: 8328306: AArch64: MacOS lazy JIT "write xor execute" switching [v3]

[Andrew Haley]

On Fri, 15 Aug 2025 01:09:18 GMT, Dean Long <dlong at openjdk.org> wrote:

>> Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update src/hotspot/os_cpu/bsd_aarch64/os_bsd_aarch64.cpp
>>   
>>   Co-authored-by: Dean Long <17332032+dean-long at users.noreply.github.com>
>
> src/hotspot/share/runtime/javaCalls.cpp line 330:
> 
>> 328: 
>> 329:   JavaThread* thread = THREAD;
>> 330:   MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXExec, THREAD));
> 
> JavaCallWrapper::JavaCallWrapper() is already calling enable_wx(WXExec), and JavaCallWrapper::~JavaCallWrapper() is calling enable_wx(WXWrite), so we have double coverage.  Can we remove the calls from JavaCallWrapper and just keep this one, and maybe move it down closer to the StubRoutines::call_stub()?

Done.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26562#discussion_r2391540275