LABEL REPORT: lilliput ==================================================================================================== This report shows bugs with the given label, along with their backporting status. Report generated: Wed Jul 02 12:32:20 CEST 2025 Minimal actionable level to display: WAITING For actionable issues, search for these strings: "MISSING" "APPROVED" "WARNING" For lingering issues, search for these strings: "WAITING for patch to bake a little" ---------------------------------------------------------------------------------------------------- JDK-8329757: Crash with fatal error: DEBUG MESSAGE: Fast Unlock lock on stack Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8329757 Reporter: Webbug Group Assignee: Axel Boldt-Christmas Priority: P3 Components: hotspot/compiler Original Fix: 23: 23, JDK-8329757, https://git.openjdk.org/jdk/commit/e45fea5a801ac09c3d572ac07d6179e80c422942, 446 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8347006: LoadRangeNode floats above array guard in arraycopy intrinsic Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8347006 Reporter: Leonid Mesnik Assignee: Tobias Hartmann Priority: P3 Components: hotspot/compiler Original Fix: 25: 25, JDK-8347006, https://git.openjdk.org/jdk/commit/82e2a791225a289ba32360bf415274c4b48b9e00, 170 day(s) ago Backports and Forwardports: 21: MISSING 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8317452: [JVMCI] Export symbols used by lightweight locking to JVMCI compilers. Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317452 Reporter: Yudi Zheng Assignee: Yudi Zheng Priority: P4 Components: hotspot/compiler Original Fix: 22: 22, JDK-8317452, https://git.openjdk.org/jdk/commit/9718f490fb76f6712ac8f9c7f5248ca10bf83e6f, 637 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8324881: ObjectSynchronizer::inflate(Thread* current...) is invoked for non-current thread Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8324881 Reporter: Leonid Mesnik Assignee: Axel Boldt-Christmas Priority: P3 Components: hotspot/runtime Original Fix: 23: 23, JDK-8324881, https://git.openjdk.org/jdk/commit/a3a2b1fbbf00577ce1d0e3a44e9537e997b30b05, 510 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8318015: Lock inflation not needed for OSR or Deopt for new locking modes Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8318015 Reporter: Martin Doerr Assignee: Martin Doerr Priority: P4 Components: hotspot/runtime Original Fix: 22: 22, JDK-8318015, https://git.openjdk.org/jdk/commit/d0ea2a51111bd5de5a6465e7de6a4950aae89c71, 623 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8316880: AArch64: "stop: Header is not fast-locked" with -XX:-UseLSE since JDK-8315880 Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316880 Reporter: Nick Gasson Assignee: Nick Gasson Priority: P2 Components: hotspot/compiler Original Fix: 22: 22, JDK-8316880, https://git.openjdk.org/jdk/commit/b6a97c078043862b20bd8e1d1b8ccb8699995515, 638 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8318560, https://git.openjdk.org/jdk21u/commit/fd329f2a3765f356895f2f6d40ef46aae5c3222f, 621 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8310662: [Lilliput/JDK17] Fix OptoRuntime::new_array_nozero_C Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310662 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/compiler Original Fix: -1: N/A, JDK-8310662, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8317812: [Lilliput] Make C2 LoadNKlassCompactHeader more robust Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317812 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/compiler Original Fix: -1: repo-lilliput, JDK-8317812, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8317954: [Lilliput/JDK21] Make C2 LoadNKlassCompactHeader more robust Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317954 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/compiler Original Fix: -1: repo-lilliput-21, JDK-8317954, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8317957: [Lilliput/JDK17] Make C2 LoadNKlassCompactHeader more robust Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317957 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8317957, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308172: [Lilliput/JDK17] Revert disabling vzeroupper Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308172 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/compiler Original Fix: -1: N/A, JDK-8308172, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8340901: [Lilliput/JDK21] Disable some vectorization tests Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8340901 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/compiler Original Fix: -1: N/A, JDK-8340901, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316179: Use consistent naming for lightweight locking in MacroAssembler Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316179 Reporter: Stefan Karlsson Assignee: Stefan Karlsson Priority: P4 Components: hotspot/compiler Original Fix: 22: 22, JDK-8316179, https://git.openjdk.org/jdk/commit/639ba13c4b0ada1c2ae0a46e99ed707c219b3e53, 657 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8317785, https://git.openjdk.org/jdk21u/commit/cbde98cb07bea5f1b2faa9c27549d1cb32c686de, 631 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8302209: [Lilliput] Optimize fix-anon monitor owner path Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8302209 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput, JDK-8302209, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8302210: [Lilliput/JDK17] Optimize fix-anon monitor owner path Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8302210 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput, JDK-8302210, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8304331: [Lilliput/JDK17] Fix RTM locking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8304331 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8304331, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8304702: [Lilliput/JDK17] Increase size of C2HandleAnonOMOwnerStub on x86 Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8304702 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8304702, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308651: [Lilliput/JDK17] Cherry-pick PPC parts of 8297036: Generalize C2 stub mechanism Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308651 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8308651, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308680: [Lilliput/JDK17] Add missing LoadKlassStub skeletons Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308680 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8308680, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310742: [Lilliput/JDK17] Revert JVMCI _metadata field removal Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310742 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8310742, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8312095: [Lilliput/JDK17] Reinstate use of BiasedLockingCounters Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8312095 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8312095, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8314130: [Lilliput] Make loadNKlassCompactHeaders not use a TEMP register Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8314130 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput, JDK-8314130, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8314131: [Lilliput/JDK17] Make loadNKlassCompactHeaders not use a TEMP register Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8314131 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput-17, JDK-8314131, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8319185: [Lilliput] Enable and fix vectorization tests Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319185 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/compiler Original Fix: -1: repo-lilliput, JDK-8319185, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8303027: [Lilliput/JDK17] Correctly resolve forwarded objects in G1 heap iteration Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8303027 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/gc Original Fix: -1: repo-lilliput, JDK-8303027, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8314863: [Lilliput] Revert changes in zRelocate, prevent ZGC with Lilliput Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8314863 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/gc Original Fix: -1: repo-lilliput, JDK-8314863, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8314894: [Lilliput/JDK17] Revert changes in zRelocate, prevent ZGC with Lilliput Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8314894 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8314894, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8319724: [Lilliput] ParallelGC: Forwarded objects found during heap inspection Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319724 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/gc Original Fix: -1: N/A, JDK-8319724, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8353849: [Lilliput] Avoid race in compact identity hashcode Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8353849 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/gc Original Fix: -1: N/A, JDK-8353849, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8304410: [Lilliput/JDK17] Remove unneeded code in ContiguousSpace::object_iterate_from() Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8304410 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8304410, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8306122: [Lilliput] Refactor full GC forwarding Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8306122 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: N/A, JDK-8306122, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8307392: [Lilliput] Revert deflation of dead object's monitors Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307392 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput, JDK-8307392, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308423: [Lilliput/JDK17] Cherry-pick GC forwarding Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308423 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8308423, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310042: [Lilliput/JDK17] ZGC fixes and cleanups Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310042 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: N/A, JDK-8310042, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310156: [Lilliput/JDK17] Specialize full-GC loops Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310156 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8310156, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310642: [Lilliput/JDK17] Remove unnecessary check in G1ParScanThreadState Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310642 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8310642, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310733: [Lilliput/JDK17] Enter object_iterate_impl() RESOLVE path only when +UCOH Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310733 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8310733, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310944: [Lilliput/JDK17] Streamline and cleanup GC code Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310944 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-17, JDK-8310944, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8315046: [Lilliput/JDK21] Cherry-pick: 8305896: Alternative full GC forwarding Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8315046 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-21, JDK-8315046, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316108: [Lilliput/JDK21] Cherry-pick: 8305898: Alternative self-forwarding mechanism Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316108 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: repo-lilliput-21, JDK-8316108, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8346011: [Lilliput] Compact Full-GC Forwarding Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8346011 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: N/A, JDK-8346011, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8347711: [Lilliput] Parallel GC support for compact identity hashcode Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8347711 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: -1: N/A, JDK-8347711, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308296: [Lilliput/JDK17] Cherry-pick: 8275415: Prepare Leak Profiler for Lilliput Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308296 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/jfr Original Fix: -1: repo-lilliput-17, JDK-8308296, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8312606: [Lilliput/JDK17] Cherry-pick: 8276333: jdk/jfr/event/oldobject/TestLargeRootSet.java failed "assert(!contains(edge->reference())) failed: invariant" Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8312606 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/jfr Original Fix: -1: N/A, JDK-8312606, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8307764: [Lilliput/JDK17] Fix JVMTI GetObjectMonitorUsage() Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307764 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/jvmti Original Fix: -1: repo-lilliput-17, JDK-8307764, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308411: [Lilliput/JDK17] Cherry-pick: 8283710: JVMTI: Use BitSet for object marking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308411 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/jvmti Original Fix: -1: repo-lilliput-17, JDK-8308411, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8310534: [Lilliput/JDK17] Shenandoah/JVMTI heap-walk crashes Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310534 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/jvmti Original Fix: -1: N/A, JDK-8310534, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316746: Top of lock-stack does not match the unlocked object Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316746 Reporter: Martin Doerr Assignee: Martin Doerr Priority: P2 Components: hotspot/runtime Original Fix: 22: 22, JDK-8316746, https://git.openjdk.org/jdk/commit/7d8adfa855e51a90c2f125fc20a06f9a488e6248, 601 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8320422, https://git.openjdk.org/jdk21u/commit/7588fce7d26ba7b1910a0aa75b6beef72ad85fdb, 589 day(s) ago 17: 17.0.10, JDK-8320593, https://git.openjdk.org/jdk17u-dev/commit/0f2da83f79bdccff6dfb823238f971d6eb495ab8, 588 day(s) ago WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8311866: [Lilliput/JDK17] Disallow accessing oop metadata vmStructs with +UCOH Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8311866 Reporter: Aleksey Shipilev Assignee: Aleksey Shipilev Priority: P2 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8311866, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8340906: [Lilliput/JDK21] Fix CDS related issues Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8340906 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P2 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8340906, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8317262: LockStack::contains(oop) fails "assert(t->is_Java_thread()) failed: incorrect cast to JavaThread" Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317262 Reporter: Daniel Daugherty Assignee: David Holmes Priority: P3 Components: hotspot/runtime Original Fix: 22: 22, JDK-8317262, https://git.openjdk.org/jdk/commit/4ea1b99c1a6efe144af381ea538f93718e9baf74, 625 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8318545, https://git.openjdk.org/jdk21u/commit/94bb191b425c509c5ffebccdb665c623d6cde136, 621 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8331098: [Aarch64] Fix crash in Arrays.equals() intrinsic with -CCP Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8331098 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 23: 23, JDK-8331098, https://git.openjdk.org/jdk/commit/1dac34fa757f1d603f0bc9b9c1994c114c276add, 417 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8342826: Improve performance of oopDesc::klass() after JDK-8305895 Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8342826 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 24: 24, JDK-8342826, https://git.openjdk.org/jdk/commit/276251c44a1a5b9dc36b27ecbaed37de62fc7558, 228 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8341553: Remove UseCompactObjectHeaders extra CDS archives Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8341553 Reporter: Coleen Phillimore Assignee: Calvin Cheung Priority: P3 Components: hotspot/runtime Original Fix: 24: 24, JDK-8341553, https://git.openjdk.org/jdk/commit/acdbf83325296511e6d27cc696911d81f99b8063, 224 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected Release Notes: JDK-8341555: UseCompactObjectHeaders CDS Archives Creation The CDS archives for the Compact Object Headers feature are not included in the JDK released by Oracle. In order to take advantage of the start-up performance offered by CDS, the user can build the CDS archives with Compact Object Headers as follows: `java -Xshare:dump -XX:+UnlockExperimentalVMOptions -XX:+UseCompactObjectHeaders` The above command generates the `classes_coh.jsa` which is located in the same directory as the default CDS archive (`classes.jsa`). For example, on Linux, it is located in the `/lib/server` directory. To generate a CDS archive with Compact Object Headers and with compressed oops disabled: `java -Xshare:dump -XX:+UnlockExperimentalVMOptions -XX:+UseCompactObjectHeaders -XX:-UseCompressedOops` The above command generates the `classes_nocoops_coh.jsa` which is located in the same directory as the default CDS archive with compressed oops disabled (`classes_nocoops.jsa`). For example, on Linux, it is located in the `/lib/server` directory. WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8344363: FullGCForwarding::initialize_flags is called after ObjLayout::initialize Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8344363 Reporter: Quan Anh Mai Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 24: 24, JDK-8344363, https://git.openjdk.org/jdk/commit/cb1c73663e91e632d643c23e6c5acc1c5118ac8b, 218 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8350457: Implement JEP 519: Compact Object Headers Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8350457 Reporter: Coleen Phillimore Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 25: 25, JDK-8350457, https://git.openjdk.org/jdk/commit/1e57648abd569295f42dc19c00edfcc90c00b1d3, 41 day(s) ago Backports and Forwardports: 21: Not affected 17: Not affected Release Notes: JDK-8354168: UseCompactObjectHeaders is a product option The flag `-XX:+/-UseCompactObjectHeaders` is now a product option. This allows users to enable compact object headers without `-XX:+UnlockExperimentalVMOptions`. Compact object headers are a feature introduced in JDK 24 under JEP 450. Enabling this feature reduces the Java heap footprint of applications and potentially provides performance benefits. The feature remains disabled by default in this release but may become the default in a future release. To support use of compact object headers two additional CDS archives for the JDK image called `classes_coh.jsa` and `classes_nocoops_coh.jsa` are provided to allow equivalent startup performance when `UseCompactObjectHeaders` is turned on. JDK-8357881: Compact Object Headers CDS Archive Generation and jlink Instruction If using `-XX:+UseCompactObjectHeaders` with a custom image created with `jlink`, an additional step is needed to create the CDS archives for this configuration. After creating the image, do: ```/bin/java -XX:+UseCompactObjectHeaders -Xshare:dump``` to create the classes_coh.jsa file. In the unlikely case that you wish to use `UseCompactObjectHeaders` without `UseCompressedOops`, also create a CDS archive image by: ```/bin/java -XX:+UseCompactObjectHeaders -XX:-UseCompressedOops -Xshare:dump``` WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308956: [Lilliput/JDK17] Fix some object initialization paths Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308956 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8308956, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8318895: Deoptimization results in incorrect lightweight locking stack Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8318895 Reporter: Stefan Karlsson Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 22: 22, JDK-8318895, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8319926, https://git.openjdk.org/jdk/commit/ea1ffa34192448317ce9a61a3588b0dee3a2ef44, 599 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8325104: Lilliput: Shrink Classpointers Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8325104 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P3 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8325104, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8354070: Support Compact Object Headers as product option Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8354070 Reporter: Coleen Phillimore Assignee: Roman Kennke Priority: P3 Components: hotspot/runtime Original Fix: 25: 25, JDK-8354070, N/A, -1 day(s) ago Backports and Forwardports: 21: Not affected 17: Not affected WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316735: Print LockStack in hs_err files Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316735 Reporter: Martin Doerr Assignee: Martin Doerr Priority: P4 Components: hotspot/runtime Original Fix: 22: 22, JDK-8316735, https://git.openjdk.org/jdk/commit/20ff603108a52468dd41020cbf6c0bf669e23861, 644 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8318548, https://git.openjdk.org/jdk21u/commit/61ec9854c5c2dc80f308ff054bf4ca7752035b22, 621 day(s) ago 17: Not affected Release Notes: JDK-8316735: Print LockStack in hs_err files We have seen bugs related to the new locking which is used by default since JDK-8315880. It would be helpful to see the LockStack of a crashing JavaThread in hs_err files. JDK-8322345: Hotspot `hs_err` Files Now Print the Lock Stack A section containing the thread local lock stack has been added to `hs_err` report files. It only gets printed when the new lightweight locking mode is enabled (`-XX:LockingMode=2`). An example is given here with details about the locked objects omitted: ``` Lock stack of current Java thread (top to bottom): LockStack[1]: nsk.share.jdi.EventHandler ... LockStack[0]: java.util.Collections$SynchronizedRandomAccessList ... ``` It lists objects which are lightweight locked, through `synchronized` methods or statements, by the Java thread which is being analyzed. The object which has been locked most recently is printed first. Objects which are not lightweight locked are not displayed in this section. WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319897: Move StackWatermark handling out of LockStack::contains Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319897 Reporter: Stefan Karlsson Assignee: Stefan Karlsson Priority: P4 Components: hotspot/runtime Original Fix: 22: 22, JDK-8319897, https://git.openjdk.org/jdk/commit/bbf52e0e4cb76b4c6425e7d1266dcdbb4df556ea, 593 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.3, JDK-8322394, https://git.openjdk.org/jdk21u-dev/commit/f55a91a5d12702a703d4b2d919a053b382876218, 561 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319778: Remove unreachable code in ObjectSynchronizer::exit Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319778 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: 22: 22, JDK-8319778, https://git.openjdk.org/jdk/commit/91279fcf058a6bb16a7749c328179ab94227bb8d, 583 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319773: Avoid inflating monitors when installing hash codes for LM_LIGHTWEIGHT Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319773 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8319773, https://git.openjdk.org/jdk/commit/65a0672791f868556776fc435b37319ed69f7c84, 536 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.5, JDK-8333337, https://git.openjdk.org/jdk21u-dev/commit/55e97ce07a382f799f64f86ec9aea73875d41322, 397 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319797: Recursive lightweight locking: Runtime implementation Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319797 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8319797, https://git.openjdk.org/jdk/commit/5dbf13730ee2b57f089c57e9e7ee8ab65d4a67af, 505 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319799: Recursive lightweight locking: x86 implementation Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319799 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8319799, https://git.openjdk.org/jdk/commit/7f6bb71eb302e8388c959bdaa914b758a766d299, 504 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8319801: Recursive lightweight locking: aarch64 implementation Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319801 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8319801, https://git.openjdk.org/jdk/commit/18cea823a173e1b8b48d276daeca67b2a5cf3584, 502 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8330849: Add test to verify memory usage with recursive locking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8330849 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8330849, https://git.openjdk.org/jdk/commit/7b2560b4904d80629d3f4f25c65d9b96eee9bdb6, 433 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.5, JDK-8335061, https://git.openjdk.org/jdk21u-dev/commit/153accc74f37a1933a24761ae0a40424018e7601, 371 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8338929: Make Metaspace::deallocate space-aware Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8338929 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P4 Components: hotspot/runtime Original Fix: 24: 24, JDK-8338929, https://git.openjdk.org/jdk/commit/daf26178be07bfe4a46592bcde092ce297a092bb, 308 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8338526: Don't store abstract and interface Klasses in class metaspace Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8338526 Reporter: Coleen Phillimore Assignee: Coleen Phillimore Priority: P4 Components: hotspot/runtime Original Fix: 24: 24, JDK-8338526, https://git.openjdk.org/jdk/commit/ad104932e6c26806c353ad048ce5cff7d2b4c29a, 295 day(s) ago Backports and Forwardports: 25: Inherited 21: Not affected 17: Not affected WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8356329: Report compact object headers in hs_err Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8356329 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 25: 25, JDK-8356329, https://git.openjdk.org/jdk/commit/6b1e88a946c5aa5ab8c1b320ebdfdf595c469855, 54 day(s) ago Backports and Forwardports: 21: Not affected 17: Not affected WARNINGS: Unknown version: -1 Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8302065: [Lilliput] Cleanups and touch-ups Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8302065 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8302065, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8303450: [Lilliput/JDK17] Runtime flag to enable Lilliput Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8303450 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8303450, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8303769: [Lilliput] Fix interpreter asymmetric fast-locking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8303769 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8303769, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8303771: [Lilliput/JDK17] Fix interpreter asymmetric fast-locking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8303771 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: N/A, JDK-8303771, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8303813: [Lilliput] (AArch64) Use tbz instead of tst and br in load_klass() Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8303813 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8303813, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8304329: [Lilliput/JDK17] Fix DiagnoseSyncOnValueBasedClasses Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8304329 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8304329, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8307002: [Lilliput] [Metaspace] Make use of Klass alignment gaps Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307002 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8307002, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8307737: [Lilliput] Reduce number of loads used for Klass decoding in static code Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307737 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8307737, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8307991: [Lilliput] Use narrow i-hash only when +UseCompactObjectHeaders Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307991 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8307991, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308011: [Lilliput/JDK17] Use narrow i-hash only when +UseCompactObjectHeaders Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308011 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8308011, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308107: [Lilliput/JDK17] Cherry-pick: 8291555: Implement alternative fast-locking scheme Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308107 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8308107, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308641: [Lilliput/JDK17] Remove wrong assert in klass.hpp Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308641 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8308641, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8308647: [Lilliput/JDK17] Fix cross-builds Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8308647 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-17, JDK-8308647, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8311875: [Lilliput] Disallow accessing oop metadata vmStructs with +UCOH Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8311875 Reporter: Aleksey Shipilev Assignee: Aleksey Shipilev Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8311875, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8314485: [Lilliput/JDK21] Cherry-pick: 8139457: Array bases are aligned at HeapWord granularity Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8314485 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-21, JDK-8314485, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8315047: [Lilliput/JDK21] Some additions to 8139457: Array bases are aligned at HeapWord granularity Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8315047 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-21, JDK-8315047, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316126: [Lilliput/JDK21] Cherry-pick: 8305895: Implementation: JEP 450: Compact Object Headers (Experimental) Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316126 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-21, JDK-8316126, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316687: [Lilliput/JDK21] Various cleanups Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316687 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: N/A, JDK-8316687, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8317352: [Lilliput] Sync with upstreaming PRs Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8317352 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8317352, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8318011: [Lilliput] Fix CDS narrowKlass encoding Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8318011 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8318011, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8319524: [Lilliput] Only warn when compact headers are explicitly enabled Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319524 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8319524, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8320761: [Lilliput] Implement compact identity hashcode Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8320761 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8320761, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8326750: Lilliput: OMWorld Tasks Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8326750 Reporter: Axel Boldt-Christmas Assignee: None Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8326750, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8326752: Lilliput: OMCache: Add cache lookup unrolling Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8326752 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: -1: N/A, JDK-8326752, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8326753: Lilliput: OMCache: Use AoS Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8326753 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8326753, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8326761: Lilliput: OMWorld: Fix invalid markWord transition Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8326761 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/runtime Original Fix: -1: N/A, JDK-8326761, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8326823: Lilliput: OMWorld: Separate NMT category Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8326823 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8326823, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8328886: Lilliput: Build COH archives Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8328886 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8328886, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8330631: Lilliput: Modify runtime/CompressedOops/CompressedClassPointers for tinycp Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8330631 Reporter: Thomas Stuefe Assignee: Thomas Stuefe Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8330631, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8347710: [Lilliput] Implement 4 byte headers Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8347710 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput, JDK-8347710, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8357068: Add JVMCIUseFastLocking back and set it according to LockingMode Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8357068 Reporter: Cesar Soares Assignee: Cesar Soares Priority: P4 Components: hotspot/runtime Original Fix: -1: repo-lilliput-21, JDK-8357068, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316401: sun/tools/jhsdb/JStackStressTest.java failed with "InternalError: We should have found a thread that owns the anonymous lock" Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316401 Reporter: Daniel Daugherty Assignee: Roman Kennke Priority: P4 Components: hotspot/svc-agent Original Fix: 22: 22, JDK-8316401, https://git.openjdk.org/jdk/commit/bd918f49d29bcbc699e07b4ef8d23cfe1abd32df, 642 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8320783, https://git.openjdk.org/jdk21u/commit/593ef7c16feb2c53a9381ca94b7c22717c8f921d, 582 day(s) ago 17: Not affected WARNINGS: Unknown version: -1 ---------------------------------------------------------------------------------------------------- JDK-8310010: [Lilliput] SA: Fix oop array element alignment Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8310010 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/svc-agent Original Fix: -1: repo-lilliput, JDK-8310010, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8312171: [Lilliput/JDK17] Fix oop array element alignment Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8312171 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/svc-agent Original Fix: -1: N/A, JDK-8312171, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316367: [Lilliput/JDK21] Provide infrastructure for Lilliput-specific ProblemList Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316367 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: N/A, JDK-8316367, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316424: [Lilliput/JDK21] ZGC/CDS-related test fixes Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316424 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: repo-lilliput-21, JDK-8316424, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316442: [Lilliput/JDK21] Problem-list compiler/ciReplay tests Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316442 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: repo-lilliput-21, JDK-8316442, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8318172: [Lilliput/JDK17] Disable Lilliput in TestZGCWithCDS Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8318172 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: repo-lilliput-17, JDK-8318172, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8319135: [Lilliput] Fix objArrayOop gtest Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319135 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: repo-lilliput, JDK-8319135, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8319163: [Lilliput/JDK21] Fix arrayOopDesc gtest Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319163 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: repo-lilliput-21, JDK-8319163, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8320666: [Lilliput/JDK17] Add arrayOopDesc::base_offset() gtest Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8320666 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: N/A, JDK-8320666, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8329091: [Lilliput/JDK21] Fix tests after LM_LIGHTWEIGHT backports Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8329091 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/test Original Fix: -1: N/A, JDK-8329091, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8321134: [Lilliput/JDK21] Fix repo permissions Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8321134 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: infrastructure/build Original Fix: -1: N/A, JDK-8321134, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8321135: [Lilliput/JDK17] Fix repo permissions Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8321135 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: infrastructure/build Original Fix: -1: N/A, JDK-8321135, N/A, -1 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: Inherited WARNINGS: Unknown version: -1 Affected versions are not set ---------------------------------------------------------------------------------------------------- JDK-8316417: ObjectMonitorIterator does not return the most recent monitor and is incorrect if no monitors exists Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316417 Reporter: Axel Boldt-Christmas Assignee: Axel Boldt-Christmas Priority: P4 Components: hotspot/svc-agent Original Fix: 22: 22, JDK-8316417, https://git.openjdk.org/jdk/commit/50a7a04e9adef8d6e7adffb83b01d551e22cd910, 644 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: MISSING ---------------------------------------------------------------------------------------------------- JDK-4718400: Many quantities are held as signed that should be unsigned Original Bug: URL: https://bugs.openjdk.org/browse/JDK-4718400 Reporter: Peter Kessler Assignee: Stefan Karlsson Priority: P4 Components: hotspot/gc Original Fix: 18: 18, JDK-4718400, https://git.openjdk.java.net/jdk/commit/93be099ccb73c88532866ae6d0c288c12a592cc4, 1343 day(s) ago Backports and Forwardports: 25: Inherited 21: Inherited 17: MISSING ---------------------------------------------------------------------------------------------------- JDK-8319376: ParallelGC: Forwarded objects found during heap inspection Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8319376 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/gc Original Fix: 22: 22, JDK-8319376, https://git.openjdk.org/jdk/commit/59e9981ec21258b8aa5f93cb1fb9b0ccf9f846af, 601 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.4, JDK-8331844, https://git.openjdk.org/jdk21u-dev/commit/41fda4a528e1b1a0620445392fb8a1579b3c32f2, 420 day(s) ago 17: MISSING ---------------------------------------------------------------------------------------------------- JDK-8307236: Rendezvous GC threads under STS for monitor deflation Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8307236 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 21: 21, JDK-8307236, https://git.openjdk.org/jdk/commit/12d6ec66a6cc668c929b3ebefd52a0dcac34771a, 788 day(s) ago Backports and Forwardports: 25: Inherited 17: MISSING ---------------------------------------------------------------------------------------------------- JDK-8316958: Add test for unstructured locking Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8316958 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 22: 22, JDK-8316958, https://git.openjdk.org/jdk/commit/bcafec54a52e4c0d92b075de461fcf16d6c100b4, 629 day(s) ago Backports and Forwardports: 25: Inherited 21: 21.0.2, JDK-8318546, https://git.openjdk.org/jdk21u/commit/dc8603cb4c2291899eeae3d93ee9ebf77e964378, 621 day(s) ago 17: MISSING ---------------------------------------------------------------------------------------------------- JDK-8139457: Relax alignment of array elements Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8139457 Reporter: Aleksey Shipilev Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 23: 23, JDK-8139457, https://git.openjdk.org/jdk/commit/336bbbe3895214a772e0f3aafb36277c46645ded, 495 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected Release Notes: JDK-8325944: Relax Alignment of Array Elements Array element bases are no longer unconditionally aligned to eight bytes. Instead, they are now aligned to their element type size. This improves the footprint in some JVM modes. As Java array element alignment is not exposed to users, there is no impact on regular Java code that accesses individual elements. There are implications for bulk access methods. Unsafe accesses to arrays could now be unaligned. For example, `Unsafe.getLong(byteArray, BYTE_ARRAY_BASE_OFFSET + 0)` is not guaranteed to work on platforms that do not allow unaligned accesses. A workaround is the `Unsafe.{get, put}Unaligned*` family of methods. The `ByteBuffer` and `VarHandle` APIs that allow views of `byte[]` are updated to reflect this change (JDK-8318966). Arrays that are acquired via `GetPrimitiveArrayCritical` should not be operated upon under the assumption of a particular array base alignment. ---------------------------------------------------------------------------------------------------- JDK-8305895: Implement JEP 450: Compact Object Headers (Experimental) Original Bug: URL: https://bugs.openjdk.org/browse/JDK-8305895 Reporter: Roman Kennke Assignee: Roman Kennke Priority: P4 Components: hotspot/runtime Original Fix: 24: 24, JDK-8305895, https://git.openjdk.org/jdk/commit/44ec501a41f4794259dd03cd168838e79334890e, 235 day(s) ago Backports and Forwardports: 25: Inherited 21: MISSING 17: Not affected Release Notes: JDK-8307617: Compact Object Headers (Experimental) This release adds experimental support for compact object headers. In current 64-bit implementations, Java objects have a 12-byte header. Compact object headers reduce header sizes to 8 bytes, improving the Java heap footprint. This experimental feature can be enabled with `-XX:+UnlockExperimentalVMOptions -XX:+UseCompactObjectHeaders`. Find more details in JEP 450. ---------------------------------------------------------------------------------------------------- 122 issues shown.