[lworld] RFR: 8367412: [lworld] Adapter creation fails with guarantee(chk == -1 || chk == 0) failed: Field too big for insn

[Tobias Hartmann]

On Tue, 30 Sep 2025 13:55:10 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> We hit a guarantee failure because the immediate of the branch instruction is too large. We should use a `far_jump` instead, like we do for all other jumps to `StubRoutines::forward_exception_entry()`.
> 
> I can reproduce this reliably with `test/hotspot/jtreg/runtime/valhalla/inlinetypes/classloading/ConcurrentClassLoadingTest.java` and therefore did not add another regression test.
> 
> Thanks,
> Tobias

I had to increase the timeout of the test as well.

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PR Comment: https://git.openjdk.org/valhalla/pull/1646#issuecomment-3352541153