RFR: 8359959: Test runtime/NMT/VirtualAllocTestType.java failed: '\\[0x[0]*7f7dc4043000 - 0x[0]*7f7dc4083000\\] reserved 256KB for Test' missing from stdout/stderr [v2]

[Afshin Zafari]

> The test expects that two disjunct regions are reserved but checked it incompletely.
> It is fixed by reserving a region with triple required size and then released the middle part.
> 
>  Since it (reserving two regions that become adjacent) is not happening always, the test failed occasionally at different tiers.
> 
> Tested local linux-x64-debug.

Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:

  another approach.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25894/files
  - new: https://git.openjdk.org/jdk/pull/25894/files/d24755a5..5c90d0a0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25894&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25894&range=00-01

  Stats: 18 lines in 1 file changed: 10 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/25894.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25894/head:pull/25894

PR: https://git.openjdk.org/jdk/pull/25894