RFR: 8359423: Improve error message in case of missing jsa shared archive

[Evgeny Astigeevich]

On Tue, 17 Jun 2025 08:17:19 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> In case we use `-Xshare:on` with additional flags (regarding coh or coops) and we have the corresponding jsa archive not present,
> we get this message/error :
> 
> 
> Error occurred during initialization of VM
> Unable to use shared archive.
> 
> 
> The error message could be a little improved, e.g. telling what jsa file is not present .
> For example
> 
> 
> ./images/jdk/bin/java -Xshare:on -version
> [0.017s][error][aot] Opening of static archive /build_linux/images/jdk/lib/server/classes.jsa failed
> Error occurred during initialization of VM
> Unable to use shared archive (unrecoverable archive loading error).

src/hotspot/share/cds/metaspaceShared.cpp line 1388:

> 1386:   }
> 1387:   if (RequireSharedSpaces && has_failed) {
> 1388:       MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces, but they were required");

If you want the message to be more specific, you might need to add whether the failed loading was dynamic or static.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25846#discussion_r2152609002