[crac] RFR: PID adjustment on checkpoint [v3]

[Roman Marchenko]

On Wed, 21 Jun 2023 12:52:51 GMT, Anton Kozlov <akozlov at openjdk.org> wrote:

>> Roman Marchenko has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Disabling the test for non-linux platforms
>
> src/java.base/share/native/launcher/main.c line 328:
> 
>> 326:         const char *env_min_pid_str = getenv("CRAC_MIN_PID");
>> 327:         const int env_min_pid = env_min_pid_str ? atoi(env_min_pid_str) : 0;
>> 328:         // TODO: should it be checked for max pid overflow?
> 
> I don't quite follow max_pid problem. Could you elaborate? As for me, I don't see the need for max pid check

As far as I understand the max PID is not INT_MAX, it is 2^22. In case of CRAC_MIN_PID is greater than 2^22, we'd have a possible infinite loop while spinning the last PID.

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PR Review Comment: https://git.openjdk.org/crac/pull/86#discussion_r1237027167