RFR: 8265753: Remove manual JavaThread transitions to blocked [v7]

[Robbin Ehn]

> Please consider this change which removes the manual transitions to blocked.
> This adds a preprocess template/functor which is executed in the destructor of 'ThreadBlockInVM' if we are going to do any processing.
> This gives us a way to backout of the object/raw monitor before suspend or other processing, such as a safepoint.
> 
> The object monitor code could be straight forward changed to use this instead of manual transitions.
> 
> Raw monitors on the other hand are a bit more complicated due to 'implicit' rules (consequences of the specs).
> Added a comment in hpp trying to explain it; we cannot simply transition with a raw monitor held.
> This caused the change in the destructor ~ThreadInVMfromNative() (this specific change have also been tested in unrelated exploration of transition), now this RAII does the same as we do when going to native from Java, just setting the state.
> Since we are going from an unsafe state, in VM, to a safe state, in native, we do not need to check the poll.
> That made it possible to careful use ThreadInVMfromNative in raw monitors.
> 
> I also remove the early CAS in raw_enter.
> We lock a lock to do a CAS, in the uncontended case means CAS on lock then CAS raw monitor.
> Now we instead do a transitions, in the uncontended case means fence, CAS raw monitor, fence.
> (multiple fence (CAS is also a fence) very close to each other have little additional performance impact on contemporary hardware)
> 
> Passes t1-t7 and manual stressing relevant test groups.

Robbin Ehn 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 10 additional commits since the last revision:

 - Fixes for Dan
 - Merge branch 'master' into 8265753
 - Final fixes: last famous words
 - Review fixes 2
 - Merge branch 'master' into 8265753
 - Review fixes
 - Merge branch 'master' into 8265753
 - Fixes for Dan
 - Merge branch 'master' into 8265753
 - Removed manual transitions

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3875/files
  - new: https://git.openjdk.java.net/jdk/pull/3875/files/cc15431e..30d62e85

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3875&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3875&range=05-06

  Stats: 9596 lines in 1190 files changed: 4469 ins; 2824 del; 2303 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3875.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3875/head:pull/3875

PR: https://git.openjdk.java.net/jdk/pull/3875