RFR: 8254104: MethodCounters must exist before nmethod is installed [v2]

[Igor Veresov]

> Ensure that MethodCounters for a particular method exist during the nmethod install (for methods that were never run
> before). Tiered compilation policy depends on the state stored in the counters to function properly.

Igor Veresov has updated the pull request incrementally with one additional commit since the last revision:

  Allocate counters unconditionally.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/543/files
  - new: https://git.openjdk.java.net/jdk/pull/543/files/b626ad9c..982eb51d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=543&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=543&range=00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/543.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/543/head:pull/543

PR: https://git.openjdk.java.net/jdk/pull/543