8187809: UseMembar should be set true and deprecate the flag Reviewed-by: dcubed, sspitsyn, dholmes

8186125: "DU iteration must converge quickly" assert in split if with unsafe accesses Summary: added missing checks for Opaque4Node in split-if code Reviewed-by: kvn

8183542: Factor out serial GC specific code from GenCollectedHeap into its own subclass Reviewed-by: kbarrett, jgeorge

8185925: StackFrameInfo::walker field can be replaced with bitmap to save footprint 8153682: StackFrameInfo.declaringClass could be removed Reviewed-by: coleenp, mchung

8190711: Assert in G1MMUTracker due to concurrent modification Reviewed-by: tschatzl, rehn, sangheki

8189798: SA cleanup - part 1 Summary: Avoid varible redefinitions in SA, modify SA varible names to match hotspot ones Reviewed-by: sspitsyn, coleenp, sballal

8190881: [TESTBUG] test.runtime.ErrorHandling.TestOnError comment is incomplete Reviewed-by: iignatyev

8189213: [TESTBUG] Running jtreg tests on machine without docker shows extra message Summary: Removed the message from VMProps.java Reviewed-by: dholmes

Merge

8190570: Zero fails to build on linux-sparc due undefined reference Reviewed-by: coleenp

8186778: Make obsolete VM options for shared region size control Summary: Obsoleted SharedReadOnlySize, SharedMiscCodeSize, SharedMiscDataSize and SharedReadWriteSize Reviewed-by: dholmes

8190887: Stub code marking missing from some x86 generated stub routines Reviewed-by: kvn

8190890: remove hotspot_tier1_{compiler,gc}_closed groups Reviewed-by: ehelin, lmesnik

8189864: Provide an ascii map to visualize metaspace fragmentation Reviewed-by: goetz, coleenp

8044122: MBean access to the PID Summary: Added new API getPid for getting process ID Reviewed-by: mchung, rriggs Contributed-by: ujwal.vangapally@oracle.com

8190865: Require jtreg 4.2 b10 Reviewed-by: dcubed, erikj