RFR: 8286694: Incorrect argument processing in java launcher [v2]

[Yasumasa Suenaga]

> GCC 12 reports as following:

Yasumasa Suenaga 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 three additional commits since the last revision:

 - Use assert() to check jargv
 - Merge remote-tracking branch 'upstream/master' into JDK-8286694
 - 8286694: Incorrect argument processing in java launcher

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8694/files
  - new: https://git.openjdk.java.net/jdk/pull/8694/files/fbde50b2..339dc135

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8694&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8694&range=00-01

  Stats: 6334 lines in 527 files changed: 3166 ins; 1506 del; 1662 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8694.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8694/head:pull/8694

PR: https://git.openjdk.java.net/jdk/pull/8694