RFR: JDK-8266503: [UL] Make Decorations safely copy-able and reduce their size [v2]

[Thomas Stuefe]

On Thu, 6 May 2021 13:27:46 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> Thomas Stuefe 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 six additional commits since the last revision:
>> 
>>  - Merge
>>  - Remove harfbuzz build fix
>>  - Volker feedback
>>  - start
>>  - cherry-picked JDK-8266536
>>  - harfbuzz-buildfix
>
> src/hotspot/share/logging/logDecorations.cpp line 90:
> 
>> 88: 
>> 89: void LogDecorations::print_time_decoration(outputStream* st) const {
>> 90:   char buf[29];
> 
> nit: "29" might be better to define some constant e.g. "ISO8601_LEN". But it should might be better to happen in #3869.

> Looks good!

Thanks! I'll add the constant in the other PR

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PR: https://git.openjdk.java.net/jdk/pull/3874