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  1. JDK
  2. JDK-8221766

Load-reference barriers for Shenandoah

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 8-shenandoah, 11-shenandoah, 13
    • 13
    • hotspot
    • gc
    • b16
    • generic
    • generic

    Description

      Instead of ensuring the proper read- or write-invariant at obj and primitive store-sites, we can ensure strong invariant at object load sites. This would simplify lots of code, make optimizations much simpler and improve overall performance.

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          blocks

          Bug - A problem which impairs or prevents the functions of the product. JDK-8222838 Shenandoah: SEGV on accessing cset bitmap for NULL ptr

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8222786 Shenandoah get_barrier_strength should accept all shapes of (Weak)CAS reference barriers

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8222129 Shenandoah: Missing CompareAndSwapP/N case in get_barrier_strength()

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

          Enhancement - null JDK-8225048 Shenandoah x86_32 support

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8222766 Shenandoah: streamline post-LRB CAS barrier (x86)

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8224522 Shenandoah should apply barriers on deoptimization

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8223448 Shenandoah disabled barriers blocks omit LRB

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8224584 Shenandoah: Eliminate forwarding pointer word

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8224667 Shenandoah: Post-LRB cleanup

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

          Enhancement - null JDK-8225171 Remove leftovers in shenandoahBarrierSetC1.cpp

          • 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-8230470 Shenandoah doesn't need change from JDK-8212610 anymore

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8206457 Code paths from oop_iterate() must use barrier-free access

          • 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-8224525 Shenandoah: Eliminate shenandoah verifier's side-effects

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

          Enhancement - null JDK-8231946 Remove obsolete and unused ShenandoahVerifyObjectEquals flag

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

                Created:
                Updated:
                Resolved: