--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/debug/NashornClassReader.java	2020-04-15 18:48:18.000000000 +0530
+++ /dev/null	2020-04-15 18:48:18.000000000 +0530
@@ -1,551 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.nashorn.internal.ir.debug;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import jdk.internal.org.objectweb.asm.Attribute;
-import jdk.internal.org.objectweb.asm.ClassReader;
-import jdk.internal.org.objectweb.asm.ClassVisitor;
-import jdk.internal.org.objectweb.asm.Label;
-import jdk.nashorn.internal.ir.debug.NashornTextifier.NashornLabel;
-
-/**
- * Subclass of the ASM class reader that retains more info, such
- * as bytecode offsets
- */
-public class NashornClassReader extends ClassReader {
-
-    private final Map<String, List<Label>> labelMap = new HashMap<>();
-
-    /**
-     * Constructor
-     * @param bytecode bytecode for class
-     */
-    public NashornClassReader(final byte[] bytecode) {
-        super(bytecode);
-        parse(bytecode);
-    }
-
-    List<Label> getExtraLabels(final String className, final String methodName, final String methodDesc) {
-        final String key = fullyQualifiedName(className, methodName, methodDesc);
-        return labelMap.get(key);
-    }
-
-    private static int readByte(final byte[] bytecode, final int index) {
-        return (byte)(bytecode[index] & 0xff);
-    }
-
-    private static int readShort(final byte[] bytecode, final int index) {
-        return (short)((bytecode[index] & 0xff) << 8) | (bytecode[index + 1] & 0xff);
-    }
-
-    private static int readInt(final byte[] bytecode, final int index) {
-        return ((bytecode[index] & 0xff) << 24) | ((bytecode[index + 1] & 0xff) << 16) | ((bytecode[index + 2] & 0xff) << 8) | (bytecode[index + 3] & 0xff);
-    }
-
-    private static long readLong(final byte[] bytecode, final int index) {
-        final int hi = readInt(bytecode, index);
-        final int lo = readInt(bytecode, index + 4);
-        return ((long)hi << 32) | lo;
-    }
-
-    private static String readUTF(final int index, final int utfLen, final byte[] bytecode) {
-        final int endIndex = index + utfLen;
-        final char buf[] = new char[utfLen * 2];
-        int strLen = 0;
-        int c;
-        int st = 0;
-        char cc = 0;
-        int i = index;
-
-        while (i < endIndex) {
-            c = bytecode[i++];
-            switch (st) {
-            case 0:
-                c &= 0xFF;
-                if (c < 0x80) { // 0xxxxxxx
-                    buf[strLen++] = (char) c;
-                } else if (c < 0xE0 && c > 0xBF) { // 110x xxxx 10xx xxxx
-                    cc = (char) (c & 0x1F);
-                    st = 1;
-                } else { // 1110 xxxx 10xx xxxx 10xx xxxx
-                    cc = (char) (c & 0x0F);
-                    st = 2;
-                }
-                break;
-
-            case 1: // byte 2 of 2-byte char or byte 3 of 3-byte char
-                buf[strLen++] = (char) ((cc << 6) | (c & 0x3F));
-                st = 0;
-                break;
-
-            case 2: // byte 2 of 3-byte char
-                cc = (char) ((cc << 6) | (c & 0x3F));
-                st = 1;
-                break;
-
-            default:
-                break;
-            }
-        }
-        return new String(buf, 0, strLen);
-    }
-
-    private String parse(final byte[] bytecode) {
-        String thisClassName;
-
-        int u = 0;
-
-        final int magic = readInt(bytecode, u);
-        u += 4; //magic
-        assert magic == 0xcafebabe : Integer.toHexString(magic);
-        readShort(bytecode, u); //minor
-        u += 2;
-        readShort(bytecode, u); //major
-        u += 2; //minor
-
-        final int cpc = readShort(bytecode, u);
-        u += 2;
-        final ArrayList<Constant> cp = new ArrayList<>(cpc);
-        cp.add(null);
-
-        for (int i = 1; i < cpc; i++) {
-            //constant pool entries
-            final int tag = readByte(bytecode, u);
-            u += 1;
-            switch (tag) {
-            case 7: //class
-                cp.add(new IndexInfo(cp, tag, readShort(bytecode, u)));
-                u += 2;
-                break;
-            case 9:  //fieldref
-            case 10: //methodref
-            case 11: //interfacemethodref
-                cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2)));
-                u += 4;
-               break;
-            case 8: //string
-                cp.add(new IndexInfo(cp, tag, readShort(bytecode, u))); //string index
-                u += 2;
-                break;
-            case 3:  //int
-                cp.add(new DirectInfo<>(cp, tag, readInt(bytecode, u)));
-                u += 4;
-                break;
-            case 4:  //float
-                cp.add(new DirectInfo<>(cp, tag, Float.intBitsToFloat(readInt(bytecode, u))));
-                u += 4;
-                break;
-            case 5:  //long
-                cp.add(new DirectInfo<>(cp, tag, readLong(bytecode, u)));
-                cp.add(null);
-                i++;
-                u += 8;
-                break;
-            case 6:  //double
-                cp.add(new DirectInfo<>(cp, tag, Double.longBitsToDouble(readLong(bytecode, u))));
-                cp.add(null);
-                i++;
-                u += 8;
-                break;
-            case 12: //name and type
-                cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2)));
-                u += 4;
-                break;
-            case 1:  //utf8
-                final int len = readShort(bytecode, u);
-                u += 2;
-                cp.add(new DirectInfo<>(cp, tag, readUTF(u, len, bytecode)));
-                u += len;
-                break;
-            case 16: //methodtype
-                cp.add(new IndexInfo(cp, tag, readShort(bytecode, u)));
-                u += 2;
-                break;
-            case 18: //indy
-                cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2)) {
-                    @Override
-                    public String toString() {
-                        return "#" + index + ' ' + cp.get(index2).toString();
-                    }
-
-                });
-                u += 4;
-                break;
-            case 15: //methodhandle
-                final int kind = readByte(bytecode, u);
-                assert kind >= 1 && kind <= 9 : kind;
-                cp.add(new IndexInfo2(cp, tag, kind, readShort(bytecode, u + 1)) {
-                    @Override
-                    public String toString() {
-                        return "#" + index + ' ' + cp.get(index2).toString();
-                    }
-                });
-
-                u += 3;
-                break;
-            default:
-                assert false : tag;
-                break;
-            }
-        }
-
-        readShort(bytecode, u); //access flags
-        u += 2; //access
-        final int cls = readShort(bytecode, u);
-        u += 2; //this_class
-        thisClassName = cp.get(cls).toString();
-        u += 2; //super
-
-        final int ifc = readShort(bytecode, u);
-        u += 2;
-        u += ifc * 2;
-
-        final int fc = readShort(bytecode, u);
-        u += 2; //fields
-
-        for (int i = 0 ; i < fc ; i++) {
-            u += 2; //access
-            readShort(bytecode, u); //fieldname
-            u += 2; //name
-            u += 2; //descriptor
-            final int ac = readShort(bytecode, u);
-            u += 2;
-            //field attributes
-            for (int j = 0; j < ac; j++) {
-                u += 2; //attribute name
-                final int len = readInt(bytecode, u);
-                u += 4;
-                u += len;
-            }
-        }
-
-        final int mc = readShort(bytecode, u);
-        u += 2;
-        for (int i = 0 ; i < mc ; i++) {
-            readShort(bytecode, u);
-            u += 2; //access
-
-            final int methodNameIndex = readShort(bytecode, u);
-            u += 2;
-            final String methodName = cp.get(methodNameIndex).toString();
-
-            final int methodDescIndex = readShort(bytecode, u);
-            u += 2;
-            final String methodDesc = cp.get(methodDescIndex).toString();
-
-            final int ac = readShort(bytecode, u);
-            u += 2;
-
-            //method attributes
-            for (int j = 0; j < ac; j++) {
-                final int nameIndex = readShort(bytecode, u);
-                u += 2;
-                final String attrName = cp.get(nameIndex).toString();
-
-                final int attrLen = readInt(bytecode, u);
-                u += 4;
-
-                if ("Code".equals(attrName)) {
-                    readShort(bytecode, u);
-                    u += 2; //max stack
-                    readShort(bytecode, u);
-                    u += 2; //max locals
-                    final int len = readInt(bytecode, u);
-                    u += 4;
-                    parseCode(bytecode, u, len, fullyQualifiedName(thisClassName, methodName, methodDesc));
-                    u += len;
-                    final int elen = readShort(bytecode, u); //exception table length
-                    u += 2;
-                    u += elen * 8;
-
-                    //method attributes
-                    final int ac2 = readShort(bytecode, u);
-                    u += 2;
-                    for (int k = 0; k < ac2; k++) {
-                        u += 2; //name;
-                        final int aclen = readInt(bytecode, u);
-                        u += 4; //length
-                        u += aclen; //bytes;
-                    }
-                } else {
-                    u += attrLen;
-                }
-            }
-        }
-
-        final int ac = readShort(bytecode, u);
-        u += 2;
-        //other attributes
-        for (int i = 0 ; i < ac ; i++) {
-            readShort(bytecode, u); //name index
-            u += 2;
-            final int len = readInt(bytecode, u);
-            u += 4;
-            u += len;
-            //attribute
-        }
-
-        return thisClassName;
-    }
-
-    private static String fullyQualifiedName(final String className, final String methodName, final String methodDesc) {
-        return className + '.' + methodName + methodDesc;
-    }
-
-    private void parseCode(final byte[] bytecode, final int index, final int len, final String desc) {
-        final List<Label> labels = new ArrayList<>();
-        labelMap.put(desc, labels);
-
-        boolean wide = false;
-
-        for (int i = index; i < index + len;) {
-            final int opcode = bytecode[i];
-            labels.add(new NashornLabel(opcode, i - index));
-
-            switch (opcode & 0xff) {
-            case 0xc4: //wide
-                wide = true;
-                i += 1;
-                break;
-            case 0xa9: //ret
-                i += wide ? 4 : 2;
-                break;
-            case 0xab: //lookupswitch
-                i += 1;
-                while (((i - index) & 3) != 0) {
-                    i++;
-                }
-                readInt(bytecode, i);
-                i += 4; //defaultbyte
-                final int npairs = readInt(bytecode, i);
-                i += 4;
-                i += 8 * npairs;
-                break;
-            case 0xaa: //tableswitch
-                i += 1;
-                while (((i - index) & 3) != 0) {
-                    i++;
-                }
-                readInt(bytecode, i); //default
-                i += 4;
-                final int lo = readInt(bytecode, i);
-                i += 4;
-                final int hi = readInt(bytecode, i);
-                i += 4;
-                i += 4 * (hi - lo + 1);
-                break;
-            case 0xc5: //multianewarray
-                i += 4;
-                break;
-            case 0x19: //aload (wide)
-            case 0x18: //dload
-            case 0x17: //fload
-            case 0x15: //iload
-            case 0x16: //lload
-            case 0x3a: //astore wide
-            case 0x39: //dstore
-            case 0x38: //fstore
-            case 0x36: //istore
-            case 0x37: //lstore
-                i += wide ? 3 : 2;
-                break;
-            case 0x10: //bipush
-            case 0x12: //ldc
-            case 0xbc: //anewarrayu
-                i += 2;
-                break;
-            case 0xb4: //getfield
-            case 0xb2: //getstatic
-            case 0xbd: //anewarray
-            case 0xc0: //checkcast
-            case 0xa5: //ifacmp_eq
-            case 0xa6: //ifacmp_ne
-            case 0x9f: //all ifs and ifcmps
-            case 0xa0:
-            case 0xa1:
-            case 0xa2:
-            case 0xa3:
-            case 0xa4:
-            case 0x99:
-            case 0x9a:
-            case 0x9b:
-            case 0x9c:
-            case 0x9d:
-            case 0x9e:
-            case 0xc7:
-            case 0xc6:
-            case 0xc1: //instanceof
-            case 0xa7: //goto
-            case 0xb7: //special
-            case 0xb8: //static
-            case 0xb6: //virtual
-            case 0xa8: //jsr
-            case 0x13: //ldc_w
-            case 0x14: //ldc2_w
-            case 0xbb: //new
-            case 0xb5: //putfield
-            case 0xb3: //putstatic
-            case 0x11: //sipush
-                i += 3;
-                break;
-            case 0x84: //iinc (wide)
-                i += wide ? 5 : 3;
-                break;
-            case 0xba: //indy
-            case 0xb9: //interface
-            case 0xc8:
-            case 0xc9:  //jsr_w
-                i += 5; //goto_w
-                break;
-            default:
-                i++;
-                break;
-            }
-
-            if (wide) {
-                wide = false;
-            }
-        }
-    }
-
-    @Override
-    public void accept(final ClassVisitor classVisitor, final Attribute[] attrs, final int flags) {
-        super.accept(classVisitor, attrs, flags);
-    }
-
-    @Override
-    protected Label readLabel(final int offset, final Label[] labels) {
-        final Label label = super.readLabel(offset, labels);
-        label.info = offset;
-        return label;
-    }
-
-    private abstract static class Constant {
-        protected ArrayList<Constant> cp;
-        protected int tag;
-        protected Constant(final ArrayList<Constant> cp, final int tag) {
-            this.cp = cp;
-            this.tag = tag;
-        }
-
-        @SuppressWarnings("unused")
-        final String getType() {
-            String str = TYPE[tag];
-            while (str.length() < 16) {
-                str += " ";
-            }
-            return str;
-        }
-    }
-
-    private static class IndexInfo extends Constant {
-        protected final int index;
-
-        IndexInfo(final ArrayList<Constant> cp, final int tag, final int index) {
-            super(cp, tag);
-            this.index = index;
-        }
-
-        @Override
-        public String toString() {
-            return cp.get(index).toString();
-        }
-    }
-
-    private static class IndexInfo2 extends IndexInfo {
-        protected final int index2;
-
-        IndexInfo2(final ArrayList<Constant> cp, final int tag, final int index, final int index2) {
-            super(cp, tag, index);
-            this.index2 = index2;
-        }
-
-        @Override
-        public String toString() {
-            return super.toString() + ' ' + cp.get(index2).toString();
-        }
-    }
-
-    private static class DirectInfo<T> extends Constant {
-        protected final T info;
-
-        DirectInfo(final ArrayList<Constant> cp, final int tag, final T info) {
-            super(cp, tag);
-            this.info = info;
-        }
-
-        @Override
-        public String toString() {
-            return info.toString();// + " [class=" + info.getClass().getSimpleName() + ']';
-        }
-    }
-
-    private static final String[] TYPE = {
-        //0
-        "<error>",
-        //1
-        "UTF8",
-        //2
-        "<error>",
-        //3
-        "Integer",
-        //4
-        "Float",
-        //5
-        "Long",
-        //6
-        "Double",
-        //7
-        "Class",
-        //8
-        "String",
-        //9
-        "Fieldref",
-        //10
-        "Methodref",
-        //11
-        "InterfaceMethodRef",
-        //12
-        "NameAndType",
-        //13
-        "<error>",
-        //14
-        "<error>",
-        //15
-        "MethodHandle",
-        //16
-        "MethodType",
-        //17
-        "<error>",
-        //18
-        "Invokedynamic"
-    };
-
-}