8320892: AArch64: Restore FPU control state after JNI

[bulasevich]

Clean backport to avoid FPU control state corruption.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8320892 needs maintainer approval

Issue

• JDK-8320892: AArch64: Restore FPU control state after JNI (Bug - P3 - Approved)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/1051/head:pull/1051
$ git checkout pull/1051

Update a local copy of the PR:
$ git checkout pull/1051
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/1051/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1051

View PR using the GUI difftool:
$ git pr show -t 1051

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Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/1051.diff

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[bridgekeeper]

👋 Welcome back bulasevich! 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]

@bulasevich This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8320892: AArch64: Restore FPU control state after JNI

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 15 new commits pushed to the master branch:

• f766080: 8320397: RISC-V: Avoid passing t0 as temp register to MacroAssembler:: cmpxchg_obj_header/cmpxchgptr
• 8e19c8f: 8339386: Assertion on AIX - original PC must be in the main code section of the compiled method
• f9070df: 8341146: RISC-V: Unnecessary fences used for load-acquire in template interpreter
• e5dfeb1: 8342063: [21u][aix] Backport introduced redundant line in ProblemList
• 62e0147: Merge
• dfcd8d2: 8341989: [21u] Back out JDK-8327501 and JDK-8328366
• 0083bcd: 8341674: [21u] Remove designator DEFAULT_PROMOTED_VERSION_PRE=ea for release 21.0.5
• 90517f5: 8332644: Improve graph optimizations
• 2058719: 8331446: Improve deserialization support
• 0832548: 8328726: Better Kerberos support
• ... and 5 more: https://git.openjdk.org/jdk21u-dev/compare/9e582fcbb8ab34b44ff01ac13de5cc4d6487396d...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

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➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[openjdk]

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

[openjdk]

⚠️ @bulasevich 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.

[mlbridge]

Webrevs

• 00: Full (d4230178)

[bulasevich]

/approval request
Clean backport to avoid unexpected behavior caused by FPU control state corruption.

[openjdk]

@bulasevich
8320892: The approval request has been created successfully.

[bulasevich]

/integrate

[openjdk]

@bulasevich
Your change (at version d423017) is now ready to be sponsored by a Committer.

[phohensee]

/sponsor

[openjdk]

Going to push as commit 27d2abe.
Since your change was applied there have been 21 commits pushed to the master branch:

• fe4b0fa: 8332866: Crash in ImageIO JPEG decoding when MEM_STATS in enabled
• dd4e0ae: 8341261: Tests assume UnlockExperimentalVMOptions is disabled by default
• f19e69a: 8342014: RISC-V: ZStoreBarrierStubC2 clobbers rflags
• 70eff9d: 8340109: Ubsan: ciEnv.cpp:1660:65: runtime error: member call on null pointer of type 'struct CompileTask'
• 6ed940b: 8320682: [AArch64] C1 compilation fails with "Field too big for insn"
• fbfe11f: 8341024: [test] build/AbsPathsInImage.java fails with OOM when using ubsan-enabled binaries
• f766080: 8320397: RISC-V: Avoid passing t0 as temp register to MacroAssembler:: cmpxchg_obj_header/cmpxchgptr
• 8e19c8f: 8339386: Assertion on AIX - original PC must be in the main code section of the compiled method
• f9070df: 8341146: RISC-V: Unnecessary fences used for load-acquire in template interpreter
• e5dfeb1: 8342063: [21u][aix] Backport introduced redundant line in ProblemList
• ... and 11 more: https://git.openjdk.org/jdk21u-dev/compare/9e582fcbb8ab34b44ff01ac13de5cc4d6487396d...master

Your commit was automatically rebased without conflicts.

[openjdk]

@phohensee @bulasevich Pushed as commit 27d2abe.

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