[crac] RFR: 8272472: StackGuardPages test doesn't build with glibc 2.34

[Radim Vansa]

On Thu, 1 Dec 2022 11:53:29 GMT, Anton Kozlov <akozlov at openjdk.org> wrote:

>> [8272472](https://bugs.openjdk.org/browse/JDK-8272472): StackGuardPages test doesn't build with glibc 2.34
>> 
>> ../test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c: In function 'set_signal_handler':
>> ../test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c:72:15: error: storage size of 'altstack' isn't constant
>>    72 |   static char altstack[SIGSTKSZ];
>>       |               ^~~~~~~~
>
> I'm not sure about this. The change was made for 18 and backported to JDK17.0.2. Instead of this, I'd prefer to continue CRaC development on JDK17u [1] or on openjdk/jdk master, to avoid backporting changes useful in general. Maintaining both will create some overhead though.
> 
> [1] https://mail.openjdk.org/pipermail/crac-dev/2022-May/000230.html

@AntonKozlov So what's the plan to get CRaC builiding with new glibc? Should I create a PR to merge in the most recent jdk17u-dev?

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PR: https://git.openjdk.org/crac/pull/37