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  1. JDK
  2. JDK-8210832

Remove sneaky locking in class Monitor

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 12
    • 13
    • hotspot
    • b07

    Description

      There are certain types of global lock that may be held by a Java thread while it is blocked at a safepoint but before it has written the _owner field. These locks may be sneakily acquired by the VM thread during a safepoint to avoid deadlocks.
      Alternatively, one should identify all such locks, and ensure that Java threads never block at safepoints while holding them (_no_safepoint_check_flag). While it seems as though this could increase the time to reach a safepoint (or at least increase the mean, if not the variance), the latter approach might make for a cleaner, more maintainable JVM design.

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          duplicates

          Enhancement - null JDK-8170643 Remove mixed-size accesses to the LockWord

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8217755 SuspendThread might hang expecting lock in JavaThread::is_ext_suspend_completed

          • P3 - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-5030646 CMS: atg crashed with fastdebug build on rhas_3.0 SP1

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Enhancement - null JDK-8213137 Remove static initialization of monitor/mutex instances

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8213105 Reorder methods in mutex.cpp so related ones are near each other

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8230292 Handshakes can live-lock causing a stack overflow.

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8219642 ciReplay loads wrong data when MethodData size changes

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8256383 PlatformMutex::try_lock has different semantics on Windows and Posix

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8218975 Bug in macOSX kernel's pthread support

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8219448 split-if update_uses accesses stale idom data

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8214174 runtime/handshake/HandshakeWalkSuspendExitTest.java failed with timeout

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Enhancement - null JDK-8074355 make MutexLocker smarter about non-JavaThreads

          • P3 - Major loss of function.
          • Resolved

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              pchilanomate Patricio Chilano Mateo
              pchilanomate Patricio Chilano Mateo
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              Dates

                Created:
                Updated:
                Resolved: