Summary

Obsolete the unused UseOprofile flag.

Problem

The UseOprofile flag was copied from Linux when the macOS port was done, but is actually unused on macOS/BSD.

Solution

Obsolete the UseOprofile flag in JDK 16 and expire it in JDK 17.

Specification

Remove the flag definition from src/hotspot/os/bsd/globals_bsd.hpp:

-  product(bool, UseOprofile, false                                                       \
-          "enable support for Oprofile profiler")                                        \

Add the flag to the obsoletion section of the special flag table:

+  { "UseOprofile",          JDK_Version::undefined(), JDK_Version::jdk(16), JDK_Version::jdk(17) },