RFR: 8339307: jhsdb jstack could not trace FFM upcall frame [v3]

[Chris Plummer]

On Sat, 7 Sep 2024 01:48:39 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> This PR is successor of #20789 . I got some comments in there, then I needed to fix in many pooints. And also I have to fix branch name to kick GHA automatically (#20789 is named with `pr/`, it meets the condition to skip GHA). Hence I've opened another PR for this JBS issue.
>> 
>> This PR has been updated with about topics since #20789:
>> * Use `JavaFrameAnchor` instead of raw frame pointer to unwind frame of `UpcallStub`.
>> * The change happens x86 (includes AMD64), aarch64, PPC64, RISC-V 64 only - s390 is out of scope because SA does not have s390 implementation.
>>     * Only both AMD64 and aarch64 have tested on GHA.
>> * Refactor testcase to meet expected condition certainly.
>
> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove blank lines

Marked as reviewed by cjplummer (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/20885#pullrequestreview-2287341952