RFR: 8326236: assert(ce != nullptr) failed in Continuation::continuation_bottom_sender

[David Holmes]

On Thu, 9 Jan 2025 19:48:53 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

> Please review the following fix. In method frame::safe_for_sender() we could read a sender_pc that matches StubRoutines::cont_returnBarrier() but there is no actual continuation in the stack. I added more details in the bug comments on how we can get into this situation. The extra check verifies there is a ContinuationEntry further up in the stack. I run the patch through mach5 tiers 1-2 for sanity testing and tiers 6-7.
> 
> Thanks,
> Patricio

Based on the analysis this seems quite reasonable.

Thanks

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23017#pullrequestreview-2545870840