RFR: 8289778: ZGC: incorrect use of os::free() for mountpoint string handling after JDK-8289633

[Jie Fu]

On Thu, 7 Jul 2022 01:10:38 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> I'm curious, which tests did show the bug? Because I ran GHAs and a selection of our nightlies.
>
>> I'm curious, which tests did show the bug? Because I ran GHAs and a selection of our nightlies.
> 
> This bug can be exposed by `java -XX:+UseZGC` on some of our cloud machines with os/tlinux, not all the platforms would crash (e.g., I didn't reproduce it on Ubuntu20.04).

> Hi @DamonFool ,
> 
> thanks for the quick fix. Embarrassing, I should have catched this.
> 
> Can you please add `#include "utilities/globalDefinitions.hpp"` for the ALLOW_... macros?
> 
> Otherwise, apart from the comment changes below, fine.
> 
> Cheers, Thomas

Thanks @tstuefe for your review.

All the comments have been addressed.
Thanks.

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PR: https://git.openjdk.org/jdk/pull/9387