RFR: 8329982: compiler/jvmci/jdk.vm.ci.code.test/src/jdk/vm/ci/code/test/SimpleDebugInfoTest.java failed assert(oopDesc::is_oop_or_null(val)) failed: bad oop found [v3]

[Doug Simon]

> This PR adds the missing nmethod entry barriers to JVMCI hand assembled tests.
> It also closes the escape hatch in jvmciCodeInstaller.cpp that allowed JVMCI code to be installed without nmethod entry barriers.

Doug Simon has updated the pull request incrementally with two additional commits since the last revision:

 - fix NativeCallTest on x64
 - remove more vestiges of optional JVMCI nmethod support for entry barriers

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19035/files
  - new: https://git.openjdk.org/jdk/pull/19035/files/be4bf630..1b30b67e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19035&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19035&range=01-02

  Stats: 8 lines in 2 files changed: 0 ins; 2 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/19035.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19035/head:pull/19035

PR: https://git.openjdk.org/jdk/pull/19035