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Date:      Mon, 18 Jul 2022 05:11:59 +0000
From:      bugzilla-noreply@freebsd.org
To:        java@FreeBSD.org
Subject:   [Bug 265284] java/openjdk11: wont run or build running on VMWare on M1 Mac Mini (aarch64)
Message-ID:  <bug-265284-8522-2jR4661xzp@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-265284-8522@https.bugs.freebsd.org/bugzilla/>
References:  <bug-265284-8522@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265284

--- Comment #3 from Miguel Arroz <arroz@me.com> ---
I may have a theory that explains this. From what I could understand, Apple
Silicon chips enforce W^X at the hardware level, and it's not optional. ope=
njdk
on FreeBSD requires allowing W^X, even using -Xint (which disables JIT). Th=
is
means the CPU will prevent openjdk from using W^X even if FreeBSD assumes i=
t's
going to work.

If I set kern.elf64.allow_wx to 0, I get the error, already reported in
#256477:

> Error occurred during initialization of VM
> Could not reserve enough space in CodeCache (2496K)

When I set it to 1, I get the error I originally reported. With LLDB, I can=
 see
it eventually crashes with SIGSEGV, which supports this theory.

This would also explain #260872, which seems similar to this bug but in
openjdk8.

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