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  1. JDK
  2. JDK-8276901

Implement UseHeavyMonitors consistently

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 18
    • 18
    • hotspot
    • b27
    • x86_64
    • generic

    Backports

      Description

        The flag UseHeavyMonitors seems to imply that it makes Hotspot always use inflated monitors, rather than stack locks. However, it is only implemented in the interpreter that way. When it calls into the runtime, it would still happily stack-lock. Even worse, C1 uses another flag UseFastLocking to achieve something similar (with the same caveat that the runtime would stack-lock anyway). C2 doesn't have any such mechanism at all.
        In Lilliput I would like to experiment with disabling stack-locking, and thus, having this flag work as expected would seem very useful.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8278676 Implement UseHeavyMonitors consistently

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

            CSR - null JDK-8277025 Implement UseHeavyMonitors consistently

            • 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-8278488 Exclude RTM tests when running with +UseHeavyMonitors

            • P3 - Major loss of function.
            • Open

            Bug - A problem which impairs or prevents the functions of the product. JDK-8278479 RunThese test failure with +UseHeavyMonitors and +VerifyHeavyMonitors

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8278489 Preserve result in native wrapper with +UseHeavyMonitors

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8278379 Zero VM is broken due to UseRTMForStackLocks was not declared after JDK-8276901

            • 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-8278411 Implement UseHeavyMonitors consistently, s390 port

            • 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-8278490 Test failures on Windows with +UseHeavyMonitors

            • P3 - Major loss of function.
            • Closed

            Enhancement - null JDK-8278412 ARM32: Implement UseHeavyMonitors consistently

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

            Enhancement - null JDK-8278387 riscv: Implement UseHeavyMonitors consistently

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

            Enhancement - null JDK-8278410 Improve argument processing around UseHeavyMonitors

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

            Commit Commit openjdk/jdk/5b81d5ee

            Review Review openjdk/jdk/6320

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                rkennke Roman Kennke
                rkennke Roman Kennke
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                  Created:
                  Updated:
                  Resolved: