RFR: JDK-8288003: log events for os::dll_unload [v3]

[Matthias Baesken]

On Thu, 9 Jun 2022 15:35:27 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Currently we only log events for os::dll_load, but not for os::dll_unload, this patch adds it. On some platforms (Linux/Windows) we can use OS APIs (e.g. dlinfo on Linux) to log the path of the unloaded shared lib.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remove whitespace in os_linux.hpp

Hello, I added a NULL check to os::Linux::dll_path.
Additionally I adjusted l_path to "not available" to match the non-Linux case.

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PR: https://git.openjdk.org/jdk/pull/9101