[crac] RFR: 8364538: [CRaC] Test CRaCIgnoreRestoreIfUnavailable [v2]

[Radim Vansa]

On Tue, 5 Aug 2025 07:00:20 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

>> There is a long comment above explaining why this is done like this. Basically we need the failure to happen before `exec`ing the engine executable because there is no return to the parent VM from there.
>
> If we had some library-based engine besides `crexec` I would use that

Could we use `-XX:CRaCEngineOptions=fail-with=unknown-option` instead? Or even `-XX:CRaCEngine=non-existent`?

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PR Review Comment: https://git.openjdk.org/crac/pull/255#discussion_r2254210688