RFR: JDK-8260030: Improve stringStream buffer handling [v2]

[Thomas Stuefe]

On Thu, 21 Jan 2021 23:30:05 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Kim Feedback
>
> Other than the minor nit about use of `_is_fixed` in the destructor, looks good.

Thanks Kim, Ioi.

> src/hotspot/share/utilities/ostream.cpp line 414:
> 
>> 412: 
>> 413: stringStream::~stringStream() {
>> 414:   if (_is_fixed == false && _buffer != _small_buffer) {
> 
> Still using `_is_fixed == false` rather than `!_is_fixed`.

Oh, I missed that, sorry. Will fix before integration.

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PR: https://git.openjdk.java.net/jdk/pull/2160