public class jdk.internal.ref.Cleaner extends java.lang.ref.PhantomReference<java.lang.Object>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: jdk.internal.ref.Cleaner
  super_class: java.lang.ref.PhantomReference
{
  private static final java.lang.ref.ReferenceQueue<java.lang.Object> dummyQueue;
    descriptor: Ljava/lang/ref/ReferenceQueue;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Ljava/lang/ref/ReferenceQueue<Ljava/lang/Object;>;

  private static jdk.internal.ref.Cleaner first;
    descriptor: Ljdk/internal/ref/Cleaner;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC

  private jdk.internal.ref.Cleaner next;
    descriptor: Ljdk/internal/ref/Cleaner;
    flags: (0x0002) ACC_PRIVATE

  private jdk.internal.ref.Cleaner prev;
    descriptor: Ljdk/internal/ref/Cleaner;
    flags: (0x0002) ACC_PRIVATE

  private final java.lang.Runnable thunk;
    descriptor: Ljava/lang/Runnable;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 67
            new java.lang.ref.ReferenceQueue
            dup
            invokespecial java.lang.ref.ReferenceQueue.<init>:()V
            putstatic jdk.internal.ref.Cleaner.dummyQueue:Ljava/lang/ref/ReferenceQueue;
         1: .line 72
            aconst_null
            putstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private static synchronized jdk.internal.ref.Cleaner add(jdk.internal.ref.Cleaner);
    descriptor: (Ljdk/internal/ref/Cleaner;)Ljdk/internal/ref/Cleaner;
    flags: (0x002a) ACC_PRIVATE, ACC_STATIC, ACC_SYNCHRONIZED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // jdk.internal.ref.Cleaner cl
         0: .line 79
            getstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            ifnull 3
         1: .line 80
            aload 0 /* cl */
            getstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            putfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
         2: .line 81
            getstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            aload 0 /* cl */
            putfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
         3: .line 83
      StackMap locals:
      StackMap stack:
            aload 0 /* cl */
            putstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
         4: .line 84
            aload 0 /* cl */
            areturn
        end local 0 // jdk.internal.ref.Cleaner cl
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0    cl  Ljdk/internal/ref/Cleaner;
    MethodParameters:
      Name  Flags
      cl    

  private static synchronized boolean remove(jdk.internal.ref.Cleaner);
    descriptor: (Ljdk/internal/ref/Cleaner;)Z
    flags: (0x002a) ACC_PRIVATE, ACC_STATIC, ACC_SYNCHRONIZED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // jdk.internal.ref.Cleaner cl
         0: .line 90
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            aload 0 /* cl */
            if_acmpne 2
         1: .line 91
            iconst_0
            ireturn
         2: .line 94
      StackMap locals:
      StackMap stack:
            getstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            aload 0 /* cl */
            if_acmpne 6
         3: .line 95
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            ifnull 5
         4: .line 96
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            putstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
            goto 6
         5: .line 98
      StackMap locals:
      StackMap stack:
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
            putstatic jdk.internal.ref.Cleaner.first:Ljdk/internal/ref/Cleaner;
         6: .line 100
      StackMap locals:
      StackMap stack:
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            ifnull 8
         7: .line 101
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
            putfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
         8: .line 102
      StackMap locals:
      StackMap stack:
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
            ifnull 10
         9: .line 103
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
            aload 0 /* cl */
            getfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
            putfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
        10: .line 106
      StackMap locals:
      StackMap stack:
            aload 0 /* cl */
            aload 0 /* cl */
            putfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
        11: .line 107
            aload 0 /* cl */
            aload 0 /* cl */
            putfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
        12: .line 108
            iconst_1
            ireturn
        end local 0 // jdk.internal.ref.Cleaner cl
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   13     0    cl  Ljdk/internal/ref/Cleaner;
    MethodParameters:
      Name  Flags
      cl    

  private void <init>(java.lang.Object, java.lang.Runnable);
    descriptor: (Ljava/lang/Object;Ljava/lang/Runnable;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // jdk.internal.ref.Cleaner this
        start local 1 // java.lang.Object referent
        start local 2 // java.lang.Runnable thunk
         0: .line 115
            aload 0 /* this */
            aload 1 /* referent */
            getstatic jdk.internal.ref.Cleaner.dummyQueue:Ljava/lang/ref/ReferenceQueue;
            invokespecial java.lang.ref.PhantomReference.<init>:(Ljava/lang/Object;Ljava/lang/ref/ReferenceQueue;)V
         1: .line 75
            aload 0 /* this */
            aconst_null
            putfield jdk.internal.ref.Cleaner.next:Ljdk/internal/ref/Cleaner;
         2: .line 76
            aload 0 /* this */
            aconst_null
            putfield jdk.internal.ref.Cleaner.prev:Ljdk/internal/ref/Cleaner;
         3: .line 116
            aload 0 /* this */
            aload 2 /* thunk */
            putfield jdk.internal.ref.Cleaner.thunk:Ljava/lang/Runnable;
         4: .line 117
            return
        end local 2 // java.lang.Runnable thunk
        end local 1 // java.lang.Object referent
        end local 0 // jdk.internal.ref.Cleaner this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Ljdk/internal/ref/Cleaner;
            0    5     1  referent  Ljava/lang/Object;
            0    5     2     thunk  Ljava/lang/Runnable;
    MethodParameters:
          Name  Flags
      referent  
      thunk     

  public static jdk.internal.ref.Cleaner create(java.lang.Object, java.lang.Runnable);
    descriptor: (Ljava/lang/Object;Ljava/lang/Runnable;)Ljdk/internal/ref/Cleaner;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // java.lang.Object ob
        start local 1 // java.lang.Runnable thunk
         0: .line 131
            aload 1 /* thunk */
            ifnonnull 2
         1: .line 132
            aconst_null
            areturn
         2: .line 133
      StackMap locals:
      StackMap stack:
            new jdk.internal.ref.Cleaner
            dup
            aload 0 /* ob */
            aload 1 /* thunk */
            invokespecial jdk.internal.ref.Cleaner.<init>:(Ljava/lang/Object;Ljava/lang/Runnable;)V
            invokestatic jdk.internal.ref.Cleaner.add:(Ljdk/internal/ref/Cleaner;)Ljdk/internal/ref/Cleaner;
            areturn
        end local 1 // java.lang.Runnable thunk
        end local 0 // java.lang.Object ob
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0     ob  Ljava/lang/Object;
            0    3     1  thunk  Ljava/lang/Runnable;
    MethodParameters:
       Name  Flags
      ob     
      thunk  

  public void clean();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // jdk.internal.ref.Cleaner this
         0: .line 140
            aload 0 /* this */
            invokestatic jdk.internal.ref.Cleaner.remove:(Ljdk/internal/ref/Cleaner;)Z
            ifne 2
         1: .line 141
            return
         2: .line 143
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield jdk.internal.ref.Cleaner.thunk:Ljava/lang/Runnable;
            invokeinterface java.lang.Runnable.run:()V
         3: .line 144
            goto 6
      StackMap locals:
      StackMap stack: java.lang.Throwable
         4: astore 1 /* x */
        start local 1 // java.lang.Throwable x
         5: .line 145
            new jdk.internal.ref.Cleaner$1
            dup
            aload 0 /* this */
            aload 1 /* x */
            invokespecial jdk.internal.ref.Cleaner$1.<init>:(Ljdk/internal/ref/Cleaner;Ljava/lang/Throwable;)V
            invokestatic java.security.AccessController.doPrivileged:(Ljava/security/PrivilegedAction;)Ljava/lang/Object;
            pop
        end local 1 // java.lang.Throwable x
         6: .line 154
      StackMap locals:
      StackMap stack:
            return
        end local 0 // jdk.internal.ref.Cleaner this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Ljdk/internal/ref/Cleaner;
            5    6     1     x  Ljava/lang/Throwable;
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.Throwable
}
Signature: Ljava/lang/ref/PhantomReference<Ljava/lang/Object;>;
SourceFile: "Cleaner.java"
NestMembers:
  jdk.internal.ref.Cleaner$1
InnerClasses:
  jdk.internal.ref.Cleaner$1