RFR: JDK-8300222: Replace NULL with nullptr in share/logging

[Coleen Phillimore]

On Wed, 18 Jan 2023 11:21:23 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> src/hotspot/share/logging/logDecorations.cpp line 42:
>> 
>>> 40:     if (os::get_host_name(buffer, sizeof(buffer))) {
>>> 41:       host_name = os::strdup_check_oom(buffer);
>>> 42:       const char* old_value = Atomic::cmpxchg(&_host_name, (const char*)nullptr, host_name);
>> 
>> I wonder if you need this cast with nullptr ?
>
> The nullptr argument is templated, so we do need the cast.

Thanks for checking.  I won't ask on the next one. :)

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PR: https://git.openjdk.org/jdk/pull/12014