[aarch64-port-dev ] RFR: 8244164: AArch64: jaotc generates incorrect code for compressed OOPs with non-zero heap base

[Andrew Haley]

On 5/11/20 8:56 AM, Nick Gasson wrote:
> Bug: https://bugs.openjdk.java.net/browse/JDK-8244164
> Webrev: http://cr.openjdk.java.net/~ngasson/8244164/webrev.0/
> 
> On AArch64 if the VM jaotc is running in uses compressed oops with a
> zero base it will not emit instructions to add/subtract the heap base
> when compressing/decompressing oops. This causes a crash if the AOT'd
> shared library is loaded into a VM with non-zero heap base.
> 
> Tested jtreg hotspot_all_no_apps, jdk_core with no new failures.

OK.

> I've made a separate pull request for Graal [1] but I'm submitting this
> here too as I want to backport to 14 and 11u and also add a jtreg
> test. Not sure if this is the right process to follow?
> 
> [1] https://github.com/oracle/graal/pull/2446

Sure. It's good to get input from both sides.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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