8208242: Add @requires to vmTestbase/gc/g1 tests Summary: Added classunloading must not be disabled and G1 is required to g1/unloading tests Reviewed-by: kbarrett, tschatzl

8209127: ZGC: Improve error message when failing to map memory for mark stacks Reviewed-by: eosterlund, tschatzl

8209126: ZGC: ZMarkStackAllocator::is_initialized() never called Reviewed-by: eosterlund, tschatzl

8209125: ZGC: Clean up ZServiceabilityCounters Reviewed-by: eosterlund, tschatzl

8207756: ZGC: jstat should show CGC STW phases Reviewed-by: pliden, ysuenaga, eosterlund Contributed-by: yasuenag@gmail.com, per.liden@oracle.com

8208656: Move java/util/Calendar/CalendarTestScripts tests into OpenJDK Reviewed-by: naoto

8207965: C2-only debug build fails Reviewed-by: kvn, iignatyev Contributed-by: xxinliu@amazon.com

8208303: Track JNI failures and fail tests Summary: Fail in native code via FatalException to signal test failure Reviewed-by: amenkov, sspitsyn

8202941: GenModuleInfoSource build tool does not detect missing semicolons Reviewed-by: erikj

8208677: Move inner metaspace cleaning out of class unloading Summary: move to safepoint cleanup actions to do if needed. Reviewed-by: eosterlund, hseigel

8209149: [TESTBUG] runtime/RedefineTests/RedefineRunningMethods.java needs a longer timeout Reviewed-by: coleenp

8193822: Remove unused newDirectByteBuffer and truncate methods from buffer classes Reviewed-by: alanb, psandoz

8208672: Enable -Wreorder in make files for gcc, clang Reviewed-by: dholmes, ihse

8208671: Runtime, JFR, Serviceability changes to allow enabling -Wreorder Reviewed-by: dholmes, hseigel

8208670: Compiler changes to allow enabling -Wreorder Reviewed-by: kvn