[jdk11u-dev] RFR: 8253795: Implementation of JEP 391: macOS/AArch64 Port [v5]

[Andrew Haley]

On Wed, 15 Dec 2021 10:18:04 GMT, Andrew Haley <aph at openjdk.org> wrote:

>>> > Just for my information: if I apply this, will it be essentially identical to aarch64-port/jdk11u ?
>>> 
>>> It's an outdated version there, basically what was in zulu11 by that time. But the jep-391 (for jdk17) had evolved before reaching the final version, W^X is different at least This PR is partly based on that old patch, for os_bsd_aarch64.cpp, rest is a backport of the newer JEP-391 from upstream.
>> 
>> Ouch! That's terrible, I had no idea. So everybody who is building AArch64 from non-Azul trees has a broken release.
>
>> @theRealAph FYI, about possible consequences for other platforms in jdk11u-dev JDK-8253816: Support macOS W^X it's all under MACOS_AARCH64_ONLY, so isolated to just one platform
> 
> Sure, but this is a failure of process. It means that AArch64/MacOS would be going straight in to 11u mainline without being first baked in AArch64-port/11u.

> @theRealAph @GoeLin So what would be the verdict, should we proceed with this review here or go first into the aarch64-port and stay there for a couple of more monthes ?

I've been thinking a lot about this. At the minimum, the missing parts should go into a staging repo in aarch64-port, if only so that we have a record of what happened. I hope that it won't be a couple of months before it all goes in to mainline.

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/715