[jdk11u-dev] RFR: 8294580: frame::interpreter_frame_print_on() crashes if free BasicObjectLock exists in frame

[Richard Reingruber]

Hi all,

This pull request contains a backport of commit [openjdk/jdk at bdb4ed0](https://github.com/openjdk/jdk/commit/bdb4ed0fb136e9e5391cfa520048de6b7f83067d).

The commit being backported was authored by Richard Reingruber on 12 Oct 2022 and was reviewed by dholmes and mdoerr. It applied cleanly but did not compile. As a fix, `nullptr` was replaced with `NULL`.

The fix passed our CI testing which includes JCK and JTREG tests on the standard platforms and also on Linux/PPC64le.

Thanks!

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

Commit messages:
 - nullptr requires C++11
 - 8294580: frame::interpreter_frame_print_on() crashes if free BasicObjectLock exists in frame

Changes: https://git.openjdk.org/jdk11u-dev/pull/1590/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1590&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294580
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1590.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1590/head:pull/1590

PR: https://git.openjdk.org/jdk11u-dev/pull/1590