RFR: 8273373: Zero: Cannot invoke JVM in primordial threads on Zero [v2]

[Aleksey Shipilev]

> See the bug for more discussion.
> 
> Additional testing:
>  - [x] Linux Zero x86_64 passes most gtests now (there are unrelated failures)
>  - [x] Linux Zero x86_32 passes most gtests now (there are unrelated failures)

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch 'master' into JDK-8273373-zero-initial-stack
 - Coming up with a more limited fix
 - Merge branch 'master' into JDK-8273373-zero-initial-stack
 - Merge branch 'master' into JDK-8273373-zero-initial-stack
 - Fix

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5376/files
  - new: https://git.openjdk.java.net/jdk/pull/5376/files/e6545c1e..29021f40

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5376&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5376&range=00-01

  Stats: 13877 lines in 610 files changed: 8641 ins; 3090 del; 2146 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5376.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5376/head:pull/5376

PR: https://git.openjdk.java.net/jdk/pull/5376