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

Tobias Hartmann thartmann at openjdk.org
Tue Sep 30 14:01:54 UTC 2025


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

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

Changes: https://git.openjdk.org/valhalla/pull/1646/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1646&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367412
  Stats: 2 lines in 2 files changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1646.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1646/head:pull/1646

PR: https://git.openjdk.org/valhalla/pull/1646


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