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  1. JDK
  2. JDK-8313332

Simplify lazy jmethodID cache in InstanceKlass

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 23
    • 22
    • hotspot
    • None
    • b18

    Description


      InstanceKlass has a jmethodID cache that lazily grows after redefinition upon request for a new jmethodID. This lazy growth is because for obsolete methods, the method idnum is incremented.
      This lazy growth requires that jmethodIDs may have to be deleted if there's a race in creating them.
      Since redefinition is at a safepoint, we can just extend the jmethodID cache then since we know the count.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-6404550 Cannot implement late attach in NetBeans Profiler due to missing functionality in JVMTI

          • P1 - Blocks development and/or testing work, production could not run.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-6447640 methodOopDesc::jmethod_id() can deadlock when used by the VMThread

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-6419370 new jmethodID code has tiny holes in synchronization

          • 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-8332327 Return _methods_jmethod_ids field back in VMStructs

          • 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-6453355 new No_Safepoint_Verifier uses fail during GC

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

          Enhancement - null JDK-8268406 Deallocate jmethodID native memory

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

          Commit Commit openjdk/jdk/21867c92

          Review Review openjdk/jdk/18549

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              coleenp Coleen Phillimore
              coleenp Coleen Phillimore
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              Dates

                Created:
                Updated:
                Resolved: