RFR: JDK-8256287: [windows] add loop fuse to map_or_reserve_memory_aligned

[Thomas Stuefe]

Hi,

may I please have reviews for this little fix:

On windows, `map_or_reserve_memory_aligned()` attempts to allocate aligned memory by:
1) reserving larger area
2) releasing it
3) attempting to re-reserve into the vacated address space a smaller area at the aligned start address

Since this may fail (between (2) and (3) someone may have grabbed that address concurrently), we do this in a loop. However, when failing to release it we will loop-reserve endlessly.

This is one of the reasons for JDK-8255954 whose root cause will be fixed with JDK-8255978. But we should guard against endless loops independently from that.

This patch:
- limits the number we try this to 20. If in 20 cases someone else grabs address space concurrently, something is off...
- now correctly handles the return code of the release operation (1): in debug we assert, since if release_memory() fails something is wrong and we should take a look. In the release case, we now return an error.


Thanks!

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Commit messages:
 - Initial patch

Changes: https://git.openjdk.java.net/jdk/pull/1191/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1191&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256287
  Stats: 11 lines in 1 file changed: 6 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1191.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1191/head:pull/1191

PR: https://git.openjdk.java.net/jdk/pull/1191