RFR: 8333871: Check sysinfo return values [v4]

[Matthias Baesken]

> In the review of [JDK-8333522](https://bugs.openjdk.org/browse/JDK-8333522) it has been discussed that we might run into issues because of failing sysinfo.
> However we miss checking the return values at some places, this might need adjustment.

Matthias Baesken 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 four additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into JDK-8333871
 - use more asserts
 - 0 - terminate not needed
 - JDK-8333871

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28317/files
  - new: https://git.openjdk.org/jdk/pull/28317/files/6284ef29..2f4c7c94

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28317&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28317&range=02-03

  Stats: 86 lines in 5 files changed: 67 ins; 6 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/28317.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28317/head:pull/28317

PR: https://git.openjdk.org/jdk/pull/28317