[lworld] RFR: 8295455: [lworld] find_callee_info_helper hits "must have non-abstract attached method" assert

[Tobias Hartmann]

I was finally able to reproduce this intermittent issue. The root cause is that the call (re-)resolution code does not correctly detect a C1 caller frame if that one got deoptimized and therefore either hits an assert or uses the wrong callee entry point, leading to incorrect execution.

I also fixed an unrelated issue in the scalarized entry point of a C1 compiled method, that leads to the orig_pc not being zeroed.

Thanks,
Tobias

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Commit messages:
 - 8295455: [lworld] find_callee_info_helper hits "must have non-abstract attached method" assert

Changes: https://git.openjdk.org/valhalla/pull/795/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=795&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295455
  Stats: 14 lines in 4 files changed: 3 ins; 1 del; 10 mod
  Patch: https://git.openjdk.org/valhalla/pull/795.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/795/head:pull/795

PR: https://git.openjdk.org/valhalla/pull/795