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  1. JDK
  2. JDK-8176100

[REDO][REDO] G1 Needs pre barrier on dereference of weak JNI handles

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    • Subcomponent:
      gc
    • Resolved In Build:
      b164
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Verified

      Backports

        Description

        Mach 5 9-hs detected test failures due to this changeset:

        Changeset: 3bc68ff68250
        Author: kbarrett
        Date: 2017-02-15 22:19 -0500
        URL: http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/3bc68ff68250

        8166188: G1 Needs pre barrier on dereference of weak JNI handles
        Summary: Add low tag to jweaks and G1 barrier for jweak loads.
        Reviewed-by: mgerdin, mdoerr, pliden, dlong, dcubed, coleenp, aph, tschatzl
        Contributed-by: kim.barrett@oracle.com, martin.doerr@sap.com, volker.simonis@sap.com


        which was pushed at 2028 PT/2128 MT/2328 ET so it did not make the 1900 PT
        2017.02.15 nightly cutoff. Mach5's 14 test failures appear to all be in JDK
        tests... Of course, we don't know if there will be additional failures in
        JDK9-hs nightly testing.


        So the good news: Mach5 detected this failure earlier than we would
        have seen it with our normal HotSpot nightly! And with the email
        notification to all of the folks involved, there has already been
        eight follow-up messages (I don't count this one).

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                • Assignee:
                  mgerdin Mikael Gerdin (Inactive)
                  Reporter:
                  jwilhelm Jesper Wilhelmsson
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                    Updated:
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