RFR: 8277342: vmTestbase/nsk/stress/strace/strace004.java fails with SIGSEGV in InstanceKlass::jni_id_for [v2]

[Coleen Phillimore]

> Use the version jni_id_for_impl() as jni_id_for() that takes out the JFieldIdCreation_lock before reading jni_ids in InstanceKlass.
> Tested with mach5 tier1-3.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Fix comments.

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6466/files
  - new: https://git.openjdk.java.net/jdk/pull/6466/files/47cb164b..c44b86d5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6466&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6466&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6466.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6466/head:pull/6466

PR: https://git.openjdk.java.net/jdk/pull/6466