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  1. JDK
  2. JDK-8291555

Implement alternative fast-locking scheme

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 20
    • 21
    • hotspot
    • b22
    • generic
    • generic

    Description

      Current stack-locking overloads object headers with pointers into the stack. This makes it difficult to get hold of the actual mark word, because locking can change the header at any time.

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        Issue Links

          blocks

          Sub-task - The sub-task of the issue JDK-8305895 Implementation: JEP 450: Compact Object Headers (Experimental)

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

          Enhancement - null JDK-8307493 Use thread register C2MacroAssembler::fast_lock()

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

          CSR - null JDK-8305999 Add experimental -XX:LockingMode flag

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8307810 Consistently use LockingMode instead of UseHeavyMonitors

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

          Enhancement - null JDK-8307532 Implement LM_LIGHTWEIGHT for Zero

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

          Enhancement - null JDK-8295849 Consolidate Threads::owning_thread*

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

          Enhancement - null JDK-8300440 [Lilliput] Implement alternative fast-locking scheme

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

          Enhancement - null JDK-8307758 RISC-V: Improve bit test code introduced by JDK-8291555

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

          Enhancement - null JDK-8308479 [s390x] Implement alternative fast-locking scheme

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

          Enhancement - null JDK-8308469 [PPC64] Implement alternative fast-locking scheme

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

          Commit Commit openjdk/jdk/7f6358a8

          Review Review openjdk/jdk/9680

          Review Review openjdk/jdk/10590

          Review Review openjdk/jdk/10907

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              rkennke Roman Kennke
              rkennke Roman Kennke
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              Dates

                Created:
                Updated:
                Resolved: