[crac] RFR: [CRaC] Support checkpointing with --patch-module by treating patch JARs as persistent

[mazhen]

On Tue, 22 Jul 2025 08:37:48 GMT, mazhen <duke at openjdk.org> wrote:

>>> Great work, let's just sort out the OCA and enable running the testsuite in your repo.
>>> 
>>> Btw. the test could work using just `simengine` (there's nothing engine-specific and that would let us run on other platforms than only Linux) but it's OK to keep this on a real engine (CRIU).
>> 
>> Hi @rvansa ,
>> 
>> Thanks for the review and the green light on the changes! 
>> 
>> That's a great point about using simengine for broader platform compatibility. My reasoning for choosing the criu engine was specifically to test a true physical restore. A goal here is to verify that the module patch remains effective after the process's native state has been completely dumped and then reloaded by CRIU.
>> 
>> Since you mentioned it's okay to keep it, I'd prefer to stick with criu for this test to ensure that comprehensive validation.
>
>> Great work, let's just sort out the OCA and enable running the testsuite in your repo.
>> 
>> Btw. the test could work using just `simengine` (there's nothing engine-specific and that would let us run on other platforms than only Linux) but it's OK to keep this on a real engine (CRIU).
> 
> Hi @rvansa , 
> 
> a quick follow-up on the OCA status. I've been waiting for approval for over a month and it seems to be stalled.  Would you have any advice or be able to help nudge the process internally? Any help would be a huge boost. Thanks!

> @mz1999 Hi, any luck getting a response from Oracle?

Hi @rvansa ,

I am applying for an Individual OCA. I suspected there might have been an issue with the original submission, so I withdrew it and submitted a fresh Individual Agreement last week (on July 22nd).

It's currently 'under review', and I'm hopeful this one will be processed smoothly. I'll post an update here as soon as it's approved.

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PR Comment: https://git.openjdk.org/crac/pull/241#issuecomment-3130317571