[foreign-abi] RFR: 8251047: GC stackwalking doesn't work when intrinsics are enabled (followup) [v3]

[Jorn Vernee]

> Hi,
> 
> This PR is a followup on the earlier https://github.com/openjdk/panama-foreign/pull/279 PR. It adds a jtreg test that
> stresses the problematic stack walking fixed in the previous PR, and in particular the use-case that was failing.
> This relies on a new WhiteBox API to manually (and reliably) trigger stack frame walking and verification.
> 
> Thanks,
> Jorn

Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:

  Remove trailing whitespace

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

Changes:
  - all: https://git.openjdk.java.net/panama-foreign/pull/294/files
  - new: https://git.openjdk.java.net/panama-foreign/pull/294/files/05deec57..94157625

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=294&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=294&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/294.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/294/head:pull/294

PR: https://git.openjdk.java.net/panama-foreign/pull/294