8197901: Crash during GC when logging level is debug Reviewed-by: dholmes, coleenp Contributed-by: Leonid Mesnik <leonid.mesnik@oracle.com>

8198533: Remove obsolete JDIScaffold class from repo. Summary: update one remaining test and remove JDIScaffold from repo. Reviewed-by: sspitsyn, cjplummer

8196992: Resolve disabled warnings for libdt_socket Summary: no longer need to disable warnings in makefile Reviewed-by: sspitsyn, clanger

8198585: add asserts to verify that ServiceUtil::visible_oop is not needed Summary: asserts added Reviewed-by: stefank, sspitsyn, dcubed

8198568: clean up test/hotspot/jtreg/ProblemList.txt Reviewed-by: thartmann, gtriantafill

8198635: Remove unused safepoint message functions and ShowSafepointMsgs Reviewed-by: eosterlund, gtriantafill

8198251: [Graal] compiler/intrinsics/bmi/verifycode tests fail with Graal on macos Summary: BMI tests should be excluded from Graal JIT testing for now. Reviewed-by: thartmann

Merge

8197589: Update CPU count algorithm when both cpu shares and quotas are used Reviewed-by: dholmes, mseledtsov

8198560: Remove implicit casts from oop to JavaThread* and jlong* Reviewed-by: kbarrett, coleenp, tschatzl

8197780: Null pointer dereference in Klass::is_instance_klass of klass.hpp:532 Summary: Make generate_class_cast_message able to deal with NULL klass from the constant pool. Reviewed-by: hseigel, lfoltan

8198564: Multiple crashes on SPARC Reviewed-by: dholmes, simonis, stefank