RFR: 8256718: Obsolete the long term deprecated and aliased Trace flags [v3]

[Serguei Spitsyn]

On Wed, 2 Dec 2020 18:44:08 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

>> Please review this change to obsolete the deprecated and aliased Trace flags.  The now empty aliased_logging_flags support was left in arguments.cpp for use by trace flags that get deprecated and aliased in the future.
>> 
>> With this change, users will get the following example messages when using these obsolete flags, depending on whether -XX:+... or -XX:-... was specified:
>> 
>> VM warning: Ignoring option TraceClassPaths; support was removed in 16.0.  Please use -Xlog:class+path=info instead.
>> 
>> VM warning: Ignoring option TraceClassPaths; support was removed in 16.0.  Please use -Xlog:class+path=off instead.
>> 
>> The change was tested with tiers1and 2 on Linux, Windows, and MacOS, and tiers 3-5 on Linux x64 and with JCK lang and vm tests.
>> 
>> Thanks, Harold
>
> Harold Seigel has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8256718: Obsolete the long term deprecated and aliased Trace flags

The update looks good to me. It is a nice simplification.

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Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1525