Summary

Bypass deprecation and obsolete unused flag PrintSharedDictionary.

Problem

Currently in the mainline, one doesn't need to specify -XX:+PrintSharedDictionary in order to display the class names in a CDS archive. Its functionality already exists within PrintSharedArchiveAndExit and the flag itself does nothing.

Solution

Obsolete PrintSharedDictionary in JDK 20 and remove it in 21.

Specification

Remove the flag definition from src/hotspot/share/runtime/cds_globals.hpp:

-    product(bool, PrintSharedDictionary, false,                           \
-        "If PrintSharedArchiveAndExit is true, also print the shared "    \
-        "dictionary")                                                     \

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

+  { "PrintSharedDictionary",          JDK_Version::undefined(), JDK_Version::jdk(20), JDK_Version::jdk(21) },

Remove use of the PrintSharedDictionary flag from any remaining tests.