[Bug 265284] java/openjdk11: wont run or build running on VMWare on M1 Mac Mini (aarch64)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265284

PHO <pho@cielonegro.org> changed:

           What    |Removed                     |Added
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                 CC|                            |pho@cielonegro.org

--- Comment #10 from PHO <pho@cielonegro.org> ---
Hello. I am a pkgsrc developer from NetBSD.org. We had suffered from the same
issue on NetBSD and have recently found out the cause. The problem was not
about W^X but was about cache coherency. pkgsrc now has a series of patches to
work around the problem. Maybe you FreeBSD folks are interested in
incorporating them?

The patches are here:
https://github.com/NetBSD/pkgsrc/tree/63c121a0079d1e0eac81acb3cd557ba68f4ebe8b/lang/openjdk21/patches

To fix it apply these 3 patches:
* patch-src_hotspot_share_runtime_threadWXSetters.inline.hpp
* patch-src_hotspot_cpu_aarch64_jniFastGetField__aarch64.cpp
* patch-src_hotspot_os__cpu_bsd__aarch64_os__bsd__aarch64.cpp

And also replace every occurence of
> MACOS_AARCH64_ONLY(ThreadWXEnable
with
> AARCH64_ONLY(ThreadWXEnable
in any files under "src/hotspot". Any files, not just .[ch]pp.

The patch file for threadWXSetters.inline.hpp contains detailed explanation of
what the actual problem is and how one can fix it. I initially considered
reporting this to OpenJDK devs but it turned out they really don't want any
feedback from outsiders. They don't even allow random people on the Internet to
file a bug ticket!! So I decided to just inform you about the fix and forget
about the upstream.

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