java/17 : java.base/jdk/internal/misc/Signal.class

Signal
https://openjdk.java.net/
GPLv2 + Classpath Exception
public final class jdk.internal.misc.Signal
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: jdk.internal.misc.Signal
  super_class: java.lang.Object
{
  private static java.util.Hashtable<jdk.internal.misc.Signal, jdk.internal.misc.Signal$Handler> handlers;
    descriptor: Ljava/util/Hashtable;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Signature: Ljava/util/Hashtable<Ljdk/internal/misc/Signal;Ljdk/internal/misc/Signal$Handler;>;

  private static java.util.Hashtable<java.lang.Integer, jdk.internal.misc.Signal> signals;
    descriptor: Ljava/util/Hashtable;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Signature: Ljava/util/Hashtable<Ljava/lang/Integer;Ljdk/internal/misc/Signal;>;

  private int number;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private java.lang.String name;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 74
            new java.util.Hashtable
            dup
            iconst_4
            invokespecial java.util.Hashtable.<init>:(I)V
            putstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
         1: .line 75
            new java.util.Hashtable
            dup
            iconst_4
            invokespecial java.util.Hashtable.<init>:(I)V
            putstatic jdk.internal.misc.Signal.signals:Ljava/util/Hashtable;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public int getNumber();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // jdk.internal.misc.Signal this
         0: .line 82
            aload 0 /* this */
            getfield jdk.internal.misc.Signal.number:I
            ireturn
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljdk/internal/misc/Signal;

  public java.lang.String getName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // jdk.internal.misc.Signal this
         0: .line 92
            aload 0 /* this */
            getfield jdk.internal.misc.Signal.name:Ljava/lang/String;
            areturn
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljdk/internal/misc/Signal;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // jdk.internal.misc.Signal this
         0: .line 105
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tPattern Matching in instanceof Expressions is a preview feature and disabled by default. Use --enable-preview to enable\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljdk/internal/misc/Signal;
    MethodParameters:
      Name  Flags
      obj   

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // jdk.internal.misc.Signal this
         0: .line 117
            aload 0 /* this */
            getfield jdk.internal.misc.Signal.number:I
            ireturn
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljdk/internal/misc/Signal;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // jdk.internal.misc.Signal this
         0: .line 127
            new java.lang.StringBuilder
            dup
            ldc "SIG"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield jdk.internal.misc.Signal.name:Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Ljdk/internal/misc/Signal;

  public void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // jdk.internal.misc.Signal this
        start local 1 // java.lang.String name
         0: .line 137
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 138
            aload 1 /* name */
            ldc "name"
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         2: .line 141
            aload 1 /* name */
            ldc "SIG"
            invokevirtual java.lang.String.startsWith:(Ljava/lang/String;)Z
            ifeq 4
         3: .line 142
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unknown signal: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* name */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 144
      StackMap locals: jdk.internal.misc.Signal java.lang.String
      StackMap stack:
            aload 0 /* this */
            aload 1 /* name */
            putfield jdk.internal.misc.Signal.name:Ljava/lang/String;
         5: .line 145
            aload 0 /* this */
            aload 1 /* name */
            invokestatic jdk.internal.misc.Signal.findSignal0:(Ljava/lang/String;)I
            putfield jdk.internal.misc.Signal.number:I
         6: .line 146
            aload 0 /* this */
            getfield jdk.internal.misc.Signal.number:I
            ifge 8
         7: .line 147
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unknown signal: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* name */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 149
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.String name
        end local 0 // jdk.internal.misc.Signal this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Ljdk/internal/misc/Signal;
            0    9     1  name  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      name  

  public static synchronized jdk.internal.misc.Signal$Handler handle(jdk.internal.misc.Signal, jdk.internal.misc.Signal$Handler);
    descriptor: (Ljdk/internal/misc/Signal;Ljdk/internal/misc/Signal$Handler;)Ljdk/internal/misc/Signal$Handler;
    flags: (0x0029) ACC_PUBLIC, ACC_STATIC, ACC_SYNCHRONIZED
    Code:
      stack=5, locals=8, args_size=2
        start local 0 // jdk.internal.misc.Signal sig
        start local 1 // jdk.internal.misc.Signal$Handler handler
         0: .line 166
            aload 0 /* sig */
            ldc "sig"
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         1: .line 167
            aload 1 /* handler */
            ldc "handler"
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         2: .line 168
            aload 1 /* handler */
            instanceof jdk.internal.misc.Signal$NativeHandler
            ifeq 4
         3: .line 169
            aload 1 /* handler */
            checkcast jdk.internal.misc.Signal$NativeHandler
            invokevirtual jdk.internal.misc.Signal$NativeHandler.getHandler:()J
            goto 5
      StackMap locals:
      StackMap stack:
         4: ldc 2
         5: .line 168
      StackMap locals:
      StackMap stack: long
            lstore 2 /* newH */
        start local 2 // long newH
         6: .line 170
            aload 0 /* sig */
            getfield jdk.internal.misc.Signal.number:I
            lload 2 /* newH */
            invokestatic jdk.internal.misc.Signal.handle0:(IJ)J
            lstore 4 /* oldH */
        start local 4 // long oldH
         7: .line 171
            lload 4 /* oldH */
            ldc -1
            lcmp
            ifne 11
         8: .line 172
            new java.lang.IllegalArgumentException
            dup
         9: .line 173
            new java.lang.StringBuilder
            dup
            ldc "Signal already used by VM or OS: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* sig */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        10: .line 172
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        11: .line 175
      StackMap locals: long long
      StackMap stack:
            getstatic jdk.internal.misc.Signal.signals:Ljava/util/Hashtable;
            aload 0 /* sig */
            getfield jdk.internal.misc.Signal.number:I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            aload 0 /* sig */
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        12: .line 176
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            dup
            astore 6
            monitorenter
        13: .line 177
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            aload 0 /* sig */
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast jdk.internal.misc.Signal$Handler
            astore 7 /* oldHandler */
        start local 7 // jdk.internal.misc.Signal$Handler oldHandler
        14: .line 178
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            aload 0 /* sig */
            invokevirtual java.util.Hashtable.remove:(Ljava/lang/Object;)Ljava/lang/Object;
            pop
        15: .line 179
            lload 2 /* newH */
            ldc 2
            lcmp
            ifne 17
        16: .line 180
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            aload 0 /* sig */
            aload 1 /* handler */
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        17: .line 182
      StackMap locals: java.util.Hashtable jdk.internal.misc.Signal$Handler
      StackMap stack:
            lload 4 /* oldH */
            lconst_0
            lcmp
            ifne 20
        18: .line 183
            getstatic jdk.internal.misc.Signal$Handler.SIG_DFL:Ljdk/internal/misc/Signal$Handler;
            aload 6
            monitorexit
        19: areturn
        20: .line 184
      StackMap locals:
      StackMap stack:
            lload 4 /* oldH */
            lconst_1
            lcmp
            ifne 23
        21: .line 185
            getstatic jdk.internal.misc.Signal$Handler.SIG_IGN:Ljdk/internal/misc/Signal$Handler;
            aload 6
            monitorexit
        22: areturn
        23: .line 186
      StackMap locals:
      StackMap stack:
            lload 4 /* oldH */
            ldc 2
            lcmp
            ifne 26
        24: .line 187
            aload 7 /* oldHandler */
            aload 6
            monitorexit
        25: areturn
        26: .line 189
      StackMap locals:
      StackMap stack:
            new jdk.internal.misc.Signal$NativeHandler
            dup
            lload 4 /* oldH */
            invokespecial jdk.internal.misc.Signal$NativeHandler.<init>:(J)V
            aload 6
            monitorexit
        27: areturn
        end local 7 // jdk.internal.misc.Signal$Handler oldHandler
        28: .line 176
      StackMap locals: jdk.internal.misc.Signal jdk.internal.misc.Signal$Handler long long java.util.Hashtable
      StackMap stack: java.lang.Throwable
            aload 6
            monitorexit
        29: athrow
        end local 4 // long oldH
        end local 2 // long newH
        end local 1 // jdk.internal.misc.Signal$Handler handler
        end local 0 // jdk.internal.misc.Signal sig
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   30     0         sig  Ljdk/internal/misc/Signal;
            0   30     1     handler  Ljdk/internal/misc/Signal$Handler;
            6   30     2        newH  J
            7   30     4        oldH  J
           14   28     7  oldHandler  Ljdk/internal/misc/Signal$Handler;
      Exception table:
        from    to  target  type
          13    19      28  any
          20    22      28  any
          23    25      28  any
          26    27      28  any
          28    29      28  any
    Exceptions:
      throws java.lang.IllegalArgumentException
    MethodParameters:
         Name  Flags
      sig      
      handler  

  public static void raise(jdk.internal.misc.Signal);
    descriptor: (Ljdk/internal/misc/Signal;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // jdk.internal.misc.Signal sig
         0: .line 201
            aload 0 /* sig */
            ldc "sig"
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            pop
         1: .line 202
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            aload 0 /* sig */
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            ifnonnull 3
         2: .line 203
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unhandled signal: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* sig */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 205
      StackMap locals:
      StackMap stack:
            aload 0 /* sig */
            getfield jdk.internal.misc.Signal.number:I
            invokestatic jdk.internal.misc.Signal.raise0:(I)V
         4: .line 206
            return
        end local 0 // jdk.internal.misc.Signal sig
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0   sig  Ljdk/internal/misc/Signal;
    Exceptions:
      throws java.lang.IllegalArgumentException
    MethodParameters:
      Name  Flags
      sig   

  private static void dispatch(int);
    descriptor: (I)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=8, locals=4, args_size=1
        start local 0 // int number
         0: .line 210
            getstatic jdk.internal.misc.Signal.signals:Ljava/util/Hashtable;
            iload 0 /* number */
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast jdk.internal.misc.Signal
            astore 1 /* sig */
        start local 1 // jdk.internal.misc.Signal sig
         1: .line 211
            getstatic jdk.internal.misc.Signal.handlers:Ljava/util/Hashtable;
            aload 1 /* sig */
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast jdk.internal.misc.Signal$Handler
            astore 2 /* handler */
        start local 2 // jdk.internal.misc.Signal$Handler handler
         2: .line 213
            new jdk.internal.misc.Signal$1
            dup
            aload 2 /* handler */
            aload 1 /* sig */
            invokespecial jdk.internal.misc.Signal$1.<init>:(Ljdk/internal/misc/Signal$Handler;Ljdk/internal/misc/Signal;)V
            astore 3 /* runnable */
        start local 3 // java.lang.Runnable runnable
         3: .line 222
            aload 2 /* handler */
            ifnull 5
         4: .line 223
            new java.lang.Thread
            dup
            aconst_null
            aload 3 /* runnable */
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            aload 1 /* sig */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc " handler"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            lconst_0
            iconst_0
            invokespecial java.lang.Thread.<init>:(Ljava/lang/ThreadGroup;Ljava/lang/Runnable;Ljava/lang/String;JZ)V
            invokevirtual java.lang.Thread.start:()V
         5: .line 225
      StackMap locals: jdk.internal.misc.Signal jdk.internal.misc.Signal$Handler java.lang.Runnable
      StackMap stack:
            return
        end local 3 // java.lang.Runnable runnable
        end local 2 // jdk.internal.misc.Signal$Handler handler
        end local 1 // jdk.internal.misc.Signal sig
        end local 0 // int number
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0    number  I
            1    6     1       sig  Ljdk/internal/misc/Signal;
            2    6     2   handler  Ljdk/internal/misc/Signal$Handler;
            3    6     3  runnable  Ljava/lang/Runnable;
    MethodParameters:
        Name  Flags
      number  final

  private static native int findSignal0(java.lang.String);
    descriptor: (Ljava/lang/String;)I
    flags: (0x010a) ACC_PRIVATE, ACC_STATIC, ACC_NATIVE
    MethodParameters:
         Name  Flags
      sigName  

  private static native long handle0(int, long);
    descriptor: (IJ)J
    flags: (0x010a) ACC_PRIVATE, ACC_STATIC, ACC_NATIVE
    MethodParameters:
         Name  Flags
      sig      
      nativeH  

  private static native void raise0(int);
    descriptor: (I)V
    flags: (0x010a) ACC_PRIVATE, ACC_STATIC, ACC_NATIVE
    MethodParameters:
      Name  Flags
      sig   
}
SourceFile: "Signal.java"
NestMembers:
  jdk.internal.misc.Signal$1  jdk.internal.misc.Signal$Handler  jdk.internal.misc.Signal$NativeHandler
InnerClasses:
  jdk.internal.misc.Signal$1
  public abstract Handler = jdk.internal.misc.Signal$Handler of jdk.internal.misc.Signal
  final NativeHandler = jdk.internal.misc.Signal$NativeHandler of jdk.internal.misc.Signal
/

java/ 17/ java.base/jdk/internal/misc/Signal.class
