--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/Debug.java	2020-04-15 18:49:44.000000000 +0530
+++ /dev/null	2020-04-15 18:49:44.000000000 +0530
@@ -1,164 +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.runtime;
-
-import static jdk.nashorn.internal.parser.TokenType.EOF;
-
-import jdk.nashorn.api.scripting.NashornException;
-import jdk.nashorn.internal.parser.Lexer;
-import jdk.nashorn.internal.parser.Token;
-import jdk.nashorn.internal.parser.TokenStream;
-import jdk.nashorn.internal.parser.TokenType;
-
-/**
- * Utilities for debugging Nashorn.
- *
- */
-public final class Debug {
-    private Debug() {
-    }
-
-    /**
-     * Return the topmost JavaScript frame in a stack trace
-     * @param t throwable that contains the stack trace
-     * @return line describing the topmost JavaScript frame
-     */
-    public static String firstJSFrame(final Throwable t) {
-        for (final StackTraceElement ste : t.getStackTrace()) {
-            if (ECMAErrors.isScriptFrame(ste)) {
-                return ste.toString();
-            }
-        }
-        return "<native code>";
-    }
-
-    /**
-     * Return the topmost JavaScript frame from the current
-     * continuation
-     * @return line describing the topmost JavaScript frame
-     */
-    public static String firstJSFrame() {
-        return firstJSFrame(new Throwable());
-    }
-
-    /**
-     * Return a formatted script stack trace string with frames information separated by '\n'.
-     * This is a shortcut for {@code NashornException.getScriptStackString(new Throwable())}.
-     * @return formatted stack trace string
-     */
-    public static String scriptStack() {
-        return NashornException.getScriptStackString(new Throwable());
-    }
-
-    /**
-     * Return the system identity hashcode for an object as a human readable
-     * string
-     *
-     * @param x object
-     * @return system identity hashcode as string
-     */
-    public static String id(final Object x) {
-        return String.format("0x%08x", System.identityHashCode(x));
-    }
-
-    /**
-     * Same as {@link Debug#id} but returns the identity hashcode as
-     * an integer
-     *
-     * @param x object
-     * @return system identity hashcode
-     */
-    public static int intId(final Object x) {
-        return System.identityHashCode(x);
-    }
-
-    /**
-     * Return a stack trace element description at a depth from where we are not
-     *
-     * @param depth depth
-     * @return stack trace element as string
-     */
-    public static String stackTraceElementAt(final int depth) {
-        return new Throwable().getStackTrace()[depth + 1].toString(); // add 1 to compensate for this method
-    }
-
-    /**
-     * Determine caller for tracing purposes.
-     * @param depth depth to trace
-     * @param count max depth
-     * @param ignores elements to ignore in stack trace
-     * @return caller
-     */
-    public static String caller(final int depth, final int count, final String... ignores) {
-        String result = "";
-        final StackTraceElement[] callers = Thread.currentThread().getStackTrace();
-
-        int c = count;
-loop:
-        for (int i = depth + 1; i < callers.length && c != 0; i++) {
-            final StackTraceElement element = callers[i];
-            final String method = element.getMethodName();
-
-            for (final String ignore : ignores) {
-                if (method.compareTo(ignore) == 0) {
-                    continue loop;
-                }
-            }
-
-            result += (method + ":" + element.getLineNumber() +
-                       "                              ").substring(0, 30);
-            c--;
-        }
-
-        return result.isEmpty() ? "<no caller>" : result;
-    }
-
-    /**
-     * Dump a token stream to stdout
-     *
-     * TODO: most other bugging goes to stderr, change?
-     *
-     * @param source the source
-     * @param lexer  the lexer
-     * @param stream the stream to dump
-     */
-    public static void dumpTokens(final Source source, final Lexer lexer, final TokenStream stream) {
-        TokenType type;
-        int k = 0;
-        do {
-            while (k > stream.last()) {
-                // Get more tokens.
-                lexer.lexify();
-            }
-
-            final long token = stream.get(k);
-            type = Token.descType(token);
-            System.out.println("" + k + ": " + Token.toString(source, token, true));
-            k++;
-        } while(type != EOF);
-    }
-
-}