8345296: AArch64: VM crashes with SIGILL when prctl is disallowed

[krk]

Ref. openjdk/jdk#22479

We have caught this in some prod environments, where prctl is forbidden by the sandboxing mechanism. This fails the JVM

Does not apply cleanly, the backport depends on FloatRegister changes from JDK-8339063 which are included in src/hotspot/cpu/aarch64/register_aarch64.hpp.

Additional testing:

• Verified the bug is fixed with the seccomp repro from JDK-8345296: Segfault without the patch, works with.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8345296 needs maintainer approval

Issue

• JDK-8345296: AArch64: VM crashes with SIGILL when prctl is disallowed (Bug - P3 - Requested)

Reviewers

• Aleksey Shipilev (@shipilev - Reviewer)

Reviewing

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[bridgekeeper]

👋 Welcome back krk! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (0882e5e5)

[shipilev]

This looks right, thanks.

[openjdk]

⚠️ @krk This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[krk]

/approval request Fix VM crash on production workloads when prctl is disallowed, on AArch64 with SVE.

[openjdk]

@krk
8345296: The approval request has been created successfully.