Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8266542

Remove broken -XX:-UseLoopSafepoints flag

    XMLWordPrintable

    Details

    • Subcomponent:
    • Resolved In Build:
      b22

      Description

      Simply running java -XX:-UseLoopSafepoints already crashes the VM:

      # A fatal error has been detected by the Java Runtime Environment:
      #
      # Internal Error (/oracle/jdk/open/src/hotspot/share/opto/cfgnode.cpp:1893), pid=1368883, tid=1368900
      # assert(r->in(0) == __null || !r->in(0)->is_Root()) failed: not a specially hidden merge
      #
      # JRE version: Java(TM) SE Runtime Environment (17.0) (fastdebug build 17-internal+0-LTS-2021-05-04-1333554.tobias...)
      # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 17-internal+0-LTS-2021-05-04-1333554.tobias..., mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
      # Problematic frame:
      # V [libjvm.so+0x8b1d54] PhiNode::Ideal(PhaseGVN*, bool)+0x6e4

      Running more sophisticated testing fails with all kinds of different asserts and crashes.

      JDK-6232281 made an attempt of fixing some simple cases.

        Attachments

          Issue Links

            Activity

              People

              Assignee:
              thartmann Tobias Hartmann
              Reporter:
              thartmann Tobias Hartmann
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: