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  1. JDK
  2. JDK-8231197

Shenandoah: JVMTI heap walking cleanup crashes with NULL forwardee

    Details

    • Subcomponent:
      gc
    • Resolved In Build:
      b16

      Backports

        Description

        $ CONF=linux-x86_64-server-fastdebug make images run-test TEST=vmTestbase/nsk/jvmti/unit/FollowReferences/ TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC"

        Fails:

        #
        # A fatal error has been detected by the Java Runtime Environment:
        #
        # Internal Error (/home/shade/trunks/shenandoah-jdk11/src/hotspot/share/gc/shenandoah/shenandoahForwarding.inline.hpp:47), pid=5542, tid=5555
        # Error: Shenandoah assert_correct failed; Forwardee must point to a heap address

        Referenced from:
          no interior location recorded (probably a plain heap scan, or detached oop)

        Object:
          0x000000070f12b720 - klass 0x0000000800068aa8 nsk.jvmti.unit.FollowReferences.followref001RootTestedClass
                allocated after mark start
                marked
            not in collection set
          mark: marked(0x0000000000000003)
          region: | 4|R |BTE 70f100000, 70f200000, 70f200000|TAMS 70f100000|U 1024K|T 1024K|G 0B|S 0B|L 0B|CP 0|SN 5, 5, 0, 0

        Forwardee:
          0x0000000000000000 - safe print, no details


        #
        # JRE version: OpenJDK Runtime Environment (11.0.5) (fastdebug build 11.0.5-internal+0-adhoc.shade.shenandoah-jdk11)
        # Java VM: OpenJDK 64-Bit Server VM (fastdebug 11.0.5-internal+0-adhoc.shade.shenandoah-jdk11, mixed mode, tiered, compressed oops, shenandoah gc, linux-amd64)

        --------------- T H R E A D ---------------

        Current thread (0x00007f23cc3cb800): VMThread "VM Thread" [stack: 0x00007f23b275f000,0x00007f23b285f000] [id=5555]

        Stack: [0x00007f23b275f000,0x00007f23b285f000], sp=0x00007f23b285ade0, free space=1007k
        Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [libjvm.so+0x194ee24] VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x314
        V [libjvm.so+0x194fcbf] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, __va_list_tag*)+0x2f
        V [libjvm.so+0xadb6f0] report_vm_error(char const*, int, char const*, char const*, ...)+0x100
        V [libjvm.so+0x164d38e] ShenandoahAsserts::print_failure(ShenandoahAsserts::SafeLevel, oop, void*, oop, char const*, char const*, char const*, int)+0x45e
        V [libjvm.so+0x164dc9a] ShenandoahAsserts::assert_correct(void*, oop, char const*, int)+0x1da
        V [libjvm.so+0x1402625] ShenandoahBarrierSet::resolve_forwarded_not_null(oop)+0x45
        V [libjvm.so+0x16ce0c0] void ObjectIterateScanRootClosure::do_oop_work<oop>(oop*)+0x70
        V [libjvm.so+0xfcd439] JNIHandles::oops_do(OopClosure*)+0xb9
        V [libjvm.so+0x16fee0c] ShenandoahHeapIterationRootScanner::roots_do(OopClosure*)+0x47c
        V [libjvm.so+0x16c63df] ShenandoahHeap::object_iterate(ObjectClosure*)+0x19f
        V [libjvm.so+0x1175787] ObjectMarker::done()+0x317
        V [libjvm.so+0x1178f88] VM_HeapWalkOperation::doit()+0x318
        V [libjvm.so+0x1993af1] VM_Operation::evaluate()+0x141
        V [libjvm.so+0x198ee2e] VMThread::evaluate_operation(VM_Operation*) [clone .constprop.60]+0x18e
        V [libjvm.so+0x198f71a] VMThread::loop()+0x50a
        V [libjvm.so+0x198fd4b] VMThread::run()+0xcb
        V [libjvm.so+0x187ddcd] Thread::call_run()+0x6d
        V [libjvm.so+0x147b856] thread_native_entry(Thread*)+0x106

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                • Assignee:
                  shade Aleksey Shipilev
                  Reporter:
                  shade Aleksey Shipilev
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                  Dates

                  • Created:
                    Updated:
                    Resolved: