8203843: BasicParState::default_estimated_thread_count(false) can return 0 in gtest Summary: Ensure minimum estimated thread count is 1. Reviewed-by: tschatzl, stuefe, rehn

8202813: Move vm_weak processing from SystemDictionary to WeakProcessor Summary: SystemDictionary has all strong roots. The weak oop_storage is processed by the WeakProcessor so it can be scanned and cleared concurrently and/or by parallel threads. Reviewed-by: kbarrett, sjohanss

8203370: [JVMCI] UseJVMCICompiler should imply EnableJVMCI Reviewed-by: kvn

8203932: Windows devkit has wrong dlls in 32 bit tools dir Reviewed-by: prr, tbell, stuefe

8203014: jcmd should output command list if no command is given Reviewed-by: sspitsyn, simonis

8196202: Javadoc should not generate frames by default Reviewed-by: ksrini

8203938: Fix build failures from JDK-8133564 Summary: Added missing static keyword Reviewed-by: kbarrett, tschatzl

8203892: Target interface added as marker interface in calls to altMetafactory Reviewed-by: mcimadamore

8203926: Problem list test/langtools/tools/javac/importscope/T8193717.java Reviewed-by: mcimadamore

8133564: Runtime - 2nd followup to Validate JVM Command-Line Flag Arguments Summary: Moved print function into JVMFlag, cleaned up include headers. Reviewed-by: coleenp, hseigel

8203885: ConcurrentLocksDump::dump_at_safepoint() should not allocate array in resource area Reviewed-by: dholmes, stuefe, kbarrett

8193717: Import resolution performance regression in JDK 9 Summary: Avoiding iteration through all sub-scopes of single import scope when looking up by name by only using those that may contain the given name. Reviewed-by: mcimadamore

8203865: Metaspace cleanup: Remove unused MemRegion in VirtualSpaceNode Reviewed-by: dholmes, zgu

8202832: cycle detection depends on ordering of requires directives Summary: Ensuring cyclic dependencies among modules produce a compile-time error. Reviewed-by: vromero

Merge