RFR: JDK-8322062: com/sun/jdi/JdwpAllowTest.java does not performs negative testing with prefix length

[Serguei Spitsyn]

On Fri, 15 Dec 2023 19:43:36 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The fix updated JdwpAllowTest to test negative scenarios (debugger tries to attach from not allowed address).
> 
> MaskTest ctor incorrectly calculates prefix length for negative tests and test main() calls `positiveTest` instead of `negativeTest` for `prefixLengthBad`.
> 
> Also fixes test output:
> LingeredApp logs to System.out and the test logs to System.err, this makes harder log analysis.

Looks good. Nice comment about `bitToChange` values.

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Marked as reviewed by sspitsyn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17131#pullrequestreview-1785143379