[jdk11u-dev] RFR: 8278871: [JVMCI] assert((uint)reason < 2* _trap_hist_limit) failed: oob

[Goetz Lindenmaier]

I backport this for parity with 11.0.15-oracle.

I had to resolve vmStructs_jvmci.cpp because of a conflict in the context.

I had to resolve the initialization of _trap_hist_limit in 
methodData.hpp. It was changed from 24 to 25 in "8223213: Implement
fast class initialization checks on x86-64" which is only in 18, so the 
patch did not apply.

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Commit messages:
 - Backport 6f0e8da6d3bef340299e48977d5e17d05eabe682

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/776/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=776&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278871
  Stats: 20 lines in 5 files changed: 9 ins; 4 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/776.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/776/head:pull/776

PR: https://git.openjdk.java.net/jdk11u-dev/pull/776