--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/debug/NashornTextifier.java	2020-04-15 18:48:19.000000000 +0530
+++ /dev/null	2020-04-15 18:48:19.000000000 +0530
@@ -1,1272 +0,0 @@
-/*
- * Copyright (c) 2010, 2018, 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.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.PrintWriter;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import jdk.internal.org.objectweb.asm.Attribute;
-import jdk.internal.org.objectweb.asm.Handle;
-import jdk.internal.org.objectweb.asm.Label;
-import jdk.internal.org.objectweb.asm.Opcodes;
-import jdk.internal.org.objectweb.asm.Type;
-import jdk.internal.org.objectweb.asm.signature.SignatureReader;
-import jdk.internal.org.objectweb.asm.util.Printer;
-import jdk.internal.org.objectweb.asm.util.TraceSignatureVisitor;
-import jdk.nashorn.internal.runtime.ScriptEnvironment;
-import jdk.nashorn.internal.runtime.linker.Bootstrap;
-import jdk.nashorn.internal.runtime.linker.NameCodec;
-import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
-
-/**
- * Pretty printer for --print-code.
- * Also supports dot formats if --print-code has arguments
- */
-public final class NashornTextifier extends Printer {
-    private static final String BOOTSTRAP_CLASS_NAME = Bootstrap.class.getName().replace('.', '/');
-
-    private String currentClassName;
-    private Iterator<Label> labelIter;
-    private Graph graph;
-    private String currentBlock;
-
-    // Following variables are used to govern the state of collapsing long sequences of NOP.
-    /** True if the last instruction was a NOP. */
-    private boolean lastWasNop = false;
-    /** True if ellipse ("...") was emitted in place of a second NOP. */
-    private boolean lastWasEllipse = false;
-
-    private static final int INTERNAL_NAME = 0;
-    private static final int FIELD_DESCRIPTOR = 1;
-    private static final int FIELD_SIGNATURE = 2;
-    private static final int METHOD_DESCRIPTOR = 3;
-    private static final int METHOD_SIGNATURE = 4;
-    private static final int CLASS_SIGNATURE = 5;
-
-    private final String tab = "  ";
-    private final String tab2 = "    ";
-    private final String tab3 = "      ";
-
-    private Map<Label, String> labelNames;
-
-    private boolean localVarsStarted = false;
-
-    private NashornClassReader cr;
-    private ScriptEnvironment env;
-
-    /**
-     * Constructs a new {@link NashornTextifier}. <i>Subclasses must not use this
-     * constructor</i>. Instead, they must use the {@link #NashornTextifier(int)}
-     * version.
-     * @param env script environment
-     * @param cr a customized classreader for gathering, among other things, label
-     * information
-     */
-    public NashornTextifier(final ScriptEnvironment env, final NashornClassReader cr) {
-        this(Opcodes.ASM7);
-        this.env = env;
-        this.cr = cr;
-    }
-
-    private NashornTextifier(final ScriptEnvironment env, final NashornClassReader cr, final Iterator<Label> labelIter, final Graph graph) {
-        this(env, cr);
-        this.labelIter = labelIter;
-        this.graph = graph;
-    }
-
-    /**
-     * Constructs a new {@link NashornTextifier}.
-     *
-     * @param api
-     *            the ASM API version implemented by this visitor. Must be one
-     *            of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
-     */
-    protected NashornTextifier(final int api) {
-        super(api);
-    }
-
-    @Override
-    public void visit(final int version, final int access, final String name, final String signature, final String superName, final String[] interfaces) {
-        final int major = version & 0xFFFF;
-        final int minor = version >>> 16;
-
-        currentClassName = name;
-
-        final StringBuilder sb = new StringBuilder();
-        sb.append("// class version ").
-            append(major).
-            append('.').
-            append(minor).append(" (").
-            append(version).
-            append(")\n");
-
-        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
-            sb.append("// DEPRECATED\n");
-        }
-
-        sb.append("// access flags 0x"). //TODO TRANSLATE TO WHAT THEY MEAN
-            append(Integer.toHexString(access).toUpperCase()).
-            append('\n');
-
-        appendDescriptor(sb, CLASS_SIGNATURE, signature);
-        if (signature != null) {
-            final TraceSignatureVisitor sv = new TraceSignatureVisitor(access);
-            final SignatureReader r = new SignatureReader(signature);
-            r.accept(sv);
-            sb.append("// declaration: ").
-                append(name).
-                append(sv.getDeclaration()).
-                append('\n');
-        }
-
-        appendAccess(sb, access & ~Opcodes.ACC_SUPER);
-        if ((access & Opcodes.ACC_ANNOTATION) != 0) {
-            sb.append("@interface ");
-        } else if ((access & Opcodes.ACC_INTERFACE) != 0) {
-            sb.append("interface ");
-        } else if ((access & Opcodes.ACC_ENUM) == 0) {
-            sb.append("class ");
-        }
-        appendDescriptor(sb, INTERNAL_NAME, name);
-
-        if (superName != null && !"java/lang/Object".equals(superName)) {
-            sb.append(" extends ");
-            appendDescriptor(sb, INTERNAL_NAME, superName);
-            sb.append(' ');
-        }
-        if (interfaces != null && interfaces.length > 0) {
-            sb.append(" implements ");
-            for (final String interface1 : interfaces) {
-                appendDescriptor(sb, INTERNAL_NAME, interface1);
-                sb.append(' ');
-            }
-        }
-        sb.append(" {\n");
-
-        addText(sb);
-    }
-
-    @Override
-    public void visitSource(final String file, final String debug) {
-        final StringBuilder sb = new StringBuilder();
-        if (file != null) {
-            sb.append(tab).
-                append("// compiled from: ").
-                append(file).
-                append('\n');
-        }
-        if (debug != null) {
-            sb.append(tab).
-                append("// debug info: ").
-                append(debug).
-                append('\n');
-        }
-        if (sb.length() > 0) {
-            addText(sb);
-        }
-    }
-
-    @Override
-    public void visitOuterClass(final String owner, final String name, final String desc) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append(tab).append("outer class ");
-        appendDescriptor(sb, INTERNAL_NAME, owner);
-        sb.append(' ');
-        if (name != null) {
-            sb.append(name).append(' ');
-        }
-        appendDescriptor(sb, METHOD_DESCRIPTOR, desc);
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public NashornTextifier visitField(final int access, final String name, final String desc, final String signature, final Object value) {
-        final StringBuilder sb = new StringBuilder();
-//        sb.append('\n');
-        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
-            sb.append(tab).append("// DEPRECATED\n");
-        }
-
-/*        sb.append(tab).
-            append("// access flags 0x").
-            append(Integer.toHexString(access).toUpperCase()).
-            append('\n');
-*/
-
-        if (signature != null) {
-            sb.append(tab);
-            appendDescriptor(sb, FIELD_SIGNATURE, signature);
-
-            final TraceSignatureVisitor sv = new TraceSignatureVisitor(0);
-            final SignatureReader r = new SignatureReader(signature);
-            r.acceptType(sv);
-            sb.append(tab).
-                append("// declaration: ").
-                append(sv.getDeclaration()).
-                append('\n');
-        }
-
-        sb.append(tab);
-        appendAccess(sb, access);
-
-        final String prunedDesc = desc.endsWith(";") ? desc.substring(0, desc.length() - 1) : desc;
-        appendDescriptor(sb, FIELD_DESCRIPTOR, prunedDesc);
-        sb.append(' ').append(name);
-        if (value != null) {
-            sb.append(" = ");
-            if (value instanceof String) {
-                sb.append('\"').append(value).append('\"');
-            } else {
-                sb.append(value);
-            }
-        }
-
-        sb.append(";\n");
-        addText(sb);
-
-        final NashornTextifier t = createNashornTextifier();
-        addText(t.getText());
-
-        return t;
-    }
-
-    @Override
-    public NashornTextifier visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {
-
-        graph = new Graph(name);
-
-        final List<Label> extraLabels = cr.getExtraLabels(currentClassName, name, desc);
-        this.labelIter = extraLabels == null ? null : extraLabels.iterator();
-
-        final StringBuilder sb = new StringBuilder();
-
-        sb.append('\n');
-        if ((access & Opcodes.ACC_DEPRECATED) != 0) {
-            sb.append(tab).
-                append("// DEPRECATED\n");
-        }
-
-        sb.append(tab).
-            append("// access flags 0x").
-            append(Integer.toHexString(access).toUpperCase()).
-            append('\n');
-
-        if (signature != null) {
-            sb.append(tab);
-            appendDescriptor(sb, METHOD_SIGNATURE, signature);
-
-            final TraceSignatureVisitor v = new TraceSignatureVisitor(0);
-            final SignatureReader r = new SignatureReader(signature);
-            r.accept(v);
-            final String genericDecl = v.getDeclaration();
-            final String genericReturn = v.getReturnType();
-            final String genericExceptions = v.getExceptions();
-
-            sb.append(tab).
-                append("// declaration: ").
-                append(genericReturn).
-                append(' ').
-                append(name).
-                append(genericDecl);
-
-            if (genericExceptions != null) {
-                sb.append(" throws ").append(genericExceptions);
-            }
-            sb.append('\n');
-        }
-
-        sb.append(tab);
-        appendAccess(sb, access);
-        if ((access & Opcodes.ACC_NATIVE) != 0) {
-            sb.append("native ");
-        }
-        if ((access & Opcodes.ACC_VARARGS) != 0) {
-            sb.append("varargs ");
-        }
-        if ((access & Opcodes.ACC_BRIDGE) != 0) {
-            sb.append("bridge ");
-        }
-
-        sb.append(name);
-        appendDescriptor(sb, METHOD_DESCRIPTOR, desc);
-        if (exceptions != null && exceptions.length > 0) {
-            sb.append(" throws ");
-            for (final String exception : exceptions) {
-                appendDescriptor(sb, INTERNAL_NAME, exception);
-                sb.append(' ');
-            }
-        }
-
-        sb.append('\n');
-        addText(sb);
-
-        final NashornTextifier t = createNashornTextifier();
-        addText(t.getText());
-        return t;
-    }
-
-    @Override
-    public void visitClassEnd() {
-        addText("}\n");
-    }
-
-    @Override
-    public void visitFieldEnd() {
-        //empty
-    }
-
-    @Override
-    public void visitParameter(final String name, final int access) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append(tab2).append("// parameter ");
-        appendAccess(sb, access);
-        sb.append(' ').append(name == null ? "<no name>" : name)
-                .append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitCode() {
-        //empty
-    }
-
-    @Override
-    public void visitFrame(final int type, final int nLocal, final Object[] local, final int nStack, final Object[] stack) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append("frame ");
-        switch (type) {
-        case Opcodes.F_NEW:
-        case Opcodes.F_FULL:
-            sb.append("full [");
-            appendFrameTypes(sb, nLocal, local);
-            sb.append("] [");
-            appendFrameTypes(sb, nStack, stack);
-            sb.append(']');
-            break;
-        case Opcodes.F_APPEND:
-            sb.append("append [");
-            appendFrameTypes(sb, nLocal, local);
-            sb.append(']');
-            break;
-        case Opcodes.F_CHOP:
-            sb.append("chop ").append(nLocal);
-            break;
-        case Opcodes.F_SAME:
-            sb.append("same");
-            break;
-        case Opcodes.F_SAME1:
-            sb.append("same1 ");
-            appendFrameTypes(sb, 1, stack);
-            break;
-        default:
-            assert false;
-            break;
-        }
-        sb.append('\n');
-        sb.append('\n');
-        addText(sb);
-    }
-
-    private StringBuilder appendOpcode(final StringBuilder sb, final int opcode) {
-        final Label next = getNextLabel();
-        if (next instanceof NashornLabel) {
-            final int bci = next.getOffset();
-            if (bci != -1) {
-                final String bcis = "" + bci;
-                for (int i = 0; i < 5 - bcis.length(); i++) {
-                    sb.append(' ');
-                }
-                sb.append(bcis);
-                sb.append(' ');
-            } else {
-                sb.append("       ");
-            }
-        }
-
-        return sb.append(tab2).append(OPCODES[opcode].toLowerCase());
-    }
-
-    private Label getNextLabel() {
-        return labelIter == null ? null : labelIter.next();
-    }
-
-    @Override
-    public void visitInsn(final int opcode) {
-        if(opcode == Opcodes.NOP) {
-            if(lastWasEllipse) {
-                getNextLabel();
-                return;
-            } else if(lastWasNop) {
-                getNextLabel();
-                addText("          ...\n");
-                lastWasEllipse = true;
-                return;
-            } else {
-                lastWasNop = true;
-            }
-        } else {
-            lastWasNop = lastWasEllipse = false;
-        }
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append('\n');
-        addText(sb);
-        checkNoFallThru(opcode, null);
-    }
-
-    @Override
-    public void visitIntInsn(final int opcode, final int operand) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode)
-                .append(' ')
-                .append(opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer
-                        .toString(operand)).append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitVarInsn(final int opcode, final int var) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append(' ').append(var).append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitTypeInsn(final int opcode, final String type) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append(' ');
-        appendDescriptor(sb, INTERNAL_NAME, type);
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitFieldInsn(final int opcode, final String owner, final String name, final String desc) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append(' ');
-        appendDescriptor(sb, INTERNAL_NAME, owner);
-        sb.append('.').append(name).append(" : ");
-        appendDescriptor(sb, FIELD_DESCRIPTOR, desc);
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitMethodInsn(final int opcode, final String owner, final String name, final String desc, final boolean itf) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append(' ');
-        appendDescriptor(sb, INTERNAL_NAME, owner);
-        sb.append('.').append(name);
-        appendDescriptor(sb, METHOD_DESCRIPTOR, desc);
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitInvokeDynamicInsn(final String name, final String desc, final Handle bsm, final Object... bsmArgs) {
-        final StringBuilder sb = new StringBuilder();
-
-        appendOpcode(sb, Opcodes.INVOKEDYNAMIC).append(' ');
-        final boolean isNashornBootstrap = isNashornBootstrap(bsm);
-        final boolean isNashornMathBootstrap = isNashornMathBootstrap(bsm);
-        if (isNashornBootstrap) {
-            sb.append(NashornCallSiteDescriptor.getOperationName((Integer)bsmArgs[0]));
-            final String decodedName = NameCodec.decode(name);
-            if (!decodedName.isEmpty()) {
-                sb.append(':').append(decodedName);
-            }
-        } else {
-            sb.append(name);
-        }
-        appendDescriptor(sb, METHOD_DESCRIPTOR, desc);
-        final int len = sb.length();
-        for (int i = 0; i < 80 - len ; i++) {
-            sb.append(' ');
-        }
-        sb.append(" [");
-        appendHandle(sb, bsm);
-        if (bsmArgs.length == 0) {
-            sb.append("none");
-        } else {
-            for (final Object cst : bsmArgs) {
-                if (cst instanceof String) {
-                    appendStr(sb, (String)cst);
-                } else if (cst instanceof Type) {
-                    sb.append(((Type)cst).getDescriptor()).append(".class");
-                } else if (cst instanceof Handle) {
-                    appendHandle(sb, (Handle)cst);
-                } else if (cst instanceof Integer && isNashornBootstrap) {
-                    NashornCallSiteDescriptor.appendFlags((Integer) cst, sb);
-                } else if (cst instanceof Integer && isNashornMathBootstrap) {
-                    sb.append(" pp=").append(cst);
-                } else {
-                    sb.append(cst);
-                }
-                sb.append(", ");
-            }
-            sb.setLength(sb.length() - 2);
-        }
-
-        sb.append("]\n");
-        addText(sb);
-    }
-
-    private static boolean isNashornBootstrap(final Handle bsm) {
-        return "bootstrap".equals(bsm.getName()) && BOOTSTRAP_CLASS_NAME.equals(bsm.getOwner());
-    }
-
-    private static boolean isNashornMathBootstrap(final Handle bsm) {
-        return "mathBootstrap".equals(bsm.getName()) && BOOTSTRAP_CLASS_NAME.equals(bsm.getOwner());
-    }
-
-    private static boolean noFallThru(final int opcode) {
-        switch (opcode) {
-        case Opcodes.GOTO:
-        case Opcodes.ATHROW:
-        case Opcodes.ARETURN:
-        case Opcodes.IRETURN:
-        case Opcodes.LRETURN:
-        case Opcodes.FRETURN:
-        case Opcodes.DRETURN:
-            return true;
-        default:
-            return false;
-        }
-    }
-
-    private void checkNoFallThru(final int opcode, final String to) {
-        if (noFallThru(opcode)) {
-            graph.setNoFallThru(currentBlock);
-        }
-
-        if (currentBlock != null && to != null) {
-            graph.addEdge(currentBlock, to);
-        }
-    }
-
-    @Override
-    public void visitJumpInsn(final int opcode, final Label label) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, opcode).append(' ');
-        final String to = appendLabel(sb, label);
-        sb.append('\n');
-        addText(sb);
-        checkNoFallThru(opcode, to);
-    }
-
-    private void addText(final Object t) {
-        text.add(t);
-        if (currentBlock != null) {
-            graph.addText(currentBlock, t.toString());
-        }
-    }
-
-    @Override
-    public void visitLabel(final Label label) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append("\n");
-        final String name = appendLabel(sb, label);
-        sb.append(" [bci=");
-        sb.append(label.info);
-        sb.append("]");
-        sb.append("\n");
-
-        graph.addNode(name);
-        if (currentBlock != null && !graph.isNoFallThru(currentBlock)) {
-            graph.addEdge(currentBlock, name);
-        }
-        currentBlock = name;
-        addText(sb);
-    }
-
-    @Override
-    public void visitLdcInsn(final Object cst) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, Opcodes.LDC).append(' ');
-        if (cst instanceof String) {
-            appendStr(sb, (String) cst);
-        } else if (cst instanceof Type) {
-            sb.append(((Type) cst).getDescriptor()).append(".class");
-        } else {
-            sb.append(cst);
-        }
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitIincInsn(final int var, final int increment) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, Opcodes.IINC).append(' ');
-        sb.append(var).append(' ')
-                .append(increment).append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitTableSwitchInsn(final int min, final int max, final Label dflt, final Label... labels) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, Opcodes.TABLESWITCH).append(' ');
-        for (int i = 0; i < labels.length; ++i) {
-            sb.append(tab3).append(min + i).append(": ");
-            final String to = appendLabel(sb, labels[i]);
-            graph.addEdge(currentBlock, to);
-            sb.append('\n');
-        }
-        sb.append(tab3).append("default: ");
-        appendLabel(sb, dflt);
-        sb.append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, Opcodes.LOOKUPSWITCH).append(' ');
-        for (int i = 0; i < labels.length; ++i) {
-            sb.append(tab3).append(keys[i]).append(": ");
-            final String to = appendLabel(sb, labels[i]);
-            graph.addEdge(currentBlock, to);
-            sb.append('\n');
-        }
-        sb.append(tab3).append("default: ");
-        final String to = appendLabel(sb, dflt);
-        graph.addEdge(currentBlock, to);
-        sb.append('\n');
-        addText(sb.toString());
-    }
-
-    @Override
-    public void visitMultiANewArrayInsn(final String desc, final int dims) {
-        final StringBuilder sb = new StringBuilder();
-        appendOpcode(sb, Opcodes.MULTIANEWARRAY).append(' ');
-        appendDescriptor(sb, FIELD_DESCRIPTOR, desc);
-        sb.append(' ').append(dims).append('\n');
-        addText(sb);
-    }
-
-    @Override
-    public void visitTryCatchBlock(final Label start, final Label end, final Label handler, final String type) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append(tab2).append("try ");
-        final String from = appendLabel(sb, start);
-        sb.append(' ');
-        appendLabel(sb, end);
-        sb.append(' ');
-        final String to = appendLabel(sb, handler);
-        sb.append(' ');
-        appendDescriptor(sb, INTERNAL_NAME, type);
-        sb.append('\n');
-        addText(sb);
-        graph.setIsCatch(to, type);
-        graph.addTryCatch(from, to);
-    }
-
-    @Override
-    public void visitLocalVariable(final String name, final String desc,final String signature, final Label start, final Label end, final int index) {
-
-        final StringBuilder sb = new StringBuilder();
-        if (!localVarsStarted) {
-            text.add("\n");
-            localVarsStarted = true;
-            graph.addNode("vars");
-            currentBlock = "vars";
-        }
-
-        sb.append(tab2).append("local ").append(name).append(' ');
-        final int len = sb.length();
-        for (int i = 0; i < 25 - len; i++) {
-            sb.append(' ');
-        }
-        String label;
-
-        label = appendLabel(sb, start);
-        for (int i = 0; i < 5 - label.length(); i++) {
-            sb.append(' ');
-        }
-        label = appendLabel(sb, end);
-        for (int i = 0; i < 5 - label.length(); i++) {
-            sb.append(' ');
-        }
-
-        sb.append(index).append(tab2);
-
-        appendDescriptor(sb, FIELD_DESCRIPTOR, desc);
-        sb.append('\n');
-
-        if (signature != null) {
-            sb.append(tab2);
-            appendDescriptor(sb, FIELD_SIGNATURE, signature);
-
-            final TraceSignatureVisitor sv = new TraceSignatureVisitor(0);
-            final SignatureReader r = new SignatureReader(signature);
-            r.acceptType(sv);
-            sb.append(tab2).append("// declaration: ")
-                    .append(sv.getDeclaration()).append('\n');
-        }
-        addText(sb.toString());
-    }
-
-    @Override
-    public void visitLineNumber(final int line, final Label start) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append("<line ");
-        sb.append(line);
-        sb.append(">\n");
-        addText(sb.toString());
-    }
-
-    @Override
-    public void visitMaxs(final int maxStack, final int maxLocals) {
-        final StringBuilder sb = new StringBuilder();
-        sb.append('\n');
-        sb.append(tab2).append("max stack  = ").append(maxStack);
-        sb.append(", max locals = ").append(maxLocals).append('\n');
-        addText(sb.toString());
-    }
-
-    private void printToDir(final Graph g) {
-        if (env._print_code_dir != null) {
-            final File dir = new File(env._print_code_dir);
-            if (!dir.exists() && !dir.mkdirs()) {
-                throw new RuntimeException(dir.toString());
-            }
-
-            File file;
-            int uniqueId = 0;
-            do {
-                final String fileName = g.getName() + (uniqueId == 0 ? "" : "_" + uniqueId) +  ".dot";
-                file = new File(dir, fileName);
-                uniqueId++;
-            } while (file.exists());
-
-            try (PrintWriter pw = new PrintWriter(new FileOutputStream(file))) {
-                pw.println(g);
-            } catch (final FileNotFoundException e) {
-                throw new RuntimeException(e);
-            }
-        }
-    }
-
-    @Override
-    public void visitMethodEnd() {
-        //here we need to do several bytecode guesses best upon the ldc instructions.
-        //for each instruction, assign bci. for an ldc/w/2w, guess a byte and keep
-        //iterating. if the next label is wrong, backtrack.
-        if (env._print_code_func == null || env._print_code_func.equals(graph.getName())) {
-            if (env._print_code_dir != null) {
-                printToDir(graph);
-            }
-        }
-    }
-
-    /**
-     * Creates a new TraceVisitor instance.
-     *
-     * @return a new TraceVisitor.
-     */
-    protected NashornTextifier createNashornTextifier() {
-        return new NashornTextifier(env, cr, labelIter, graph);
-    }
-
-    private static void appendDescriptor(final StringBuilder sb, final int type, final String desc) {
-        if (desc != null) {
-            if (type == CLASS_SIGNATURE || type == FIELD_SIGNATURE || type == METHOD_SIGNATURE) {
-                sb.append("// signature ").append(desc).append('\n');
-            } else {
-                appendShortDescriptor(sb, desc);
-            }
-        }
-    }
-
-    private String appendLabel(final StringBuilder sb, final Label l) {
-        if (labelNames == null) {
-            labelNames = new HashMap<>();
-        }
-        String name = labelNames.get(l);
-        if (name == null) {
-            name = "L" + labelNames.size();
-            labelNames.put(l, name);
-        }
-        sb.append(name);
-        return name;
-    }
-
-    private static void appendHandle(final StringBuilder sb, final Handle h) {
-        switch (h.getTag()) {
-        case Opcodes.H_GETFIELD:
-            sb.append("getfield");
-            break;
-        case Opcodes.H_GETSTATIC:
-            sb.append("getstatic");
-            break;
-        case Opcodes.H_PUTFIELD:
-            sb.append("putfield");
-            break;
-        case Opcodes.H_PUTSTATIC:
-            sb.append("putstatic");
-            break;
-        case Opcodes.H_INVOKEINTERFACE:
-            sb.append("interface");
-            break;
-        case Opcodes.H_INVOKESPECIAL:
-            sb.append("special");
-            break;
-        case Opcodes.H_INVOKESTATIC:
-            sb.append("static");
-            break;
-        case Opcodes.H_INVOKEVIRTUAL:
-            sb.append("virtual");
-            break;
-        case Opcodes.H_NEWINVOKESPECIAL:
-            sb.append("new_special");
-            break;
-        default:
-            assert false;
-            break;
-        }
-        sb.append(" '");
-        sb.append(h.getName());
-        sb.append("'");
-    }
-
-    private static void appendAccess(final StringBuilder sb, final int access) {
-        if ((access & Opcodes.ACC_PUBLIC) != 0) {
-            sb.append("public ");
-        }
-        if ((access & Opcodes.ACC_PRIVATE) != 0) {
-            sb.append("private ");
-        }
-        if ((access & Opcodes.ACC_PROTECTED) != 0) {
-            sb.append("protected ");
-        }
-        if ((access & Opcodes.ACC_FINAL) != 0) {
-            sb.append("final ");
-        }
-        if ((access & Opcodes.ACC_STATIC) != 0) {
-            sb.append("static ");
-        }
-        if ((access & Opcodes.ACC_SYNCHRONIZED) != 0) {
-            sb.append("synchronized ");
-        }
-        if ((access & Opcodes.ACC_VOLATILE) != 0) {
-            sb.append("volatile ");
-        }
-        if ((access & Opcodes.ACC_TRANSIENT) != 0) {
-            sb.append("transient ");
-        }
-        if ((access & Opcodes.ACC_ABSTRACT) != 0) {
-            sb.append("abstract ");
-        }
-        if ((access & Opcodes.ACC_STRICT) != 0) {
-            sb.append("strictfp ");
-        }
-        if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
-            sb.append("synthetic ");
-        }
-        if ((access & Opcodes.ACC_MANDATED) != 0) {
-            sb.append("mandated ");
-        }
-        if ((access & Opcodes.ACC_ENUM) != 0) {
-            sb.append("enum ");
-        }
-    }
-
-    private void appendFrameTypes(final StringBuilder sb, final int n, final Object[] o) {
-        for (int i = 0; i < n; ++i) {
-            if (i > 0) {
-                sb.append(' ');
-            }
-            if (o[i] instanceof String) {
-                final String desc = (String) o[i];
-                if (desc.startsWith("[")) {
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, desc);
-                } else {
-                    appendDescriptor(sb, INTERNAL_NAME, desc);
-                }
-            } else if (o[i] instanceof Integer) {
-                switch (((Integer)o[i])) {
-                case 0:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "T");
-                    break;
-                case 1:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "I");
-                    break;
-                case 2:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "F");
-                    break;
-                case 3:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "D");
-                    break;
-                case 4:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "J");
-                    break;
-                case 5:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "N");
-                    break;
-                case 6:
-                    appendDescriptor(sb, FIELD_DESCRIPTOR, "U");
-                    break;
-                default:
-                    assert false;
-                    break;
-                }
-            } else {
-                appendLabel(sb, (Label) o[i]);
-            }
-        }
-    }
-
-    private static void appendShortDescriptor(final StringBuilder sb, final String desc) {
-        //final StringBuilder buf = new StringBuilder();
-        if (desc.charAt(0) == '(') {
-            for (int i = 0; i < desc.length(); i++) {
-                if (desc.charAt(i) == 'L') {
-                    int slash = i;
-                    while (desc.charAt(i) != ';') {
-                        i++;
-                        if (desc.charAt(i) == '/') {
-                            slash = i;
-                        }
-                    }
-                    sb.append(desc.substring(slash + 1, i)).append(';');
-                } else {
-                    sb.append(desc.charAt(i));
-                }
-            }
-        } else {
-            final int lastSlash = desc.lastIndexOf('/');
-            final int lastBracket = desc.lastIndexOf('[');
-            if(lastBracket != -1) {
-                sb.append(desc, 0, lastBracket + 1);
-            }
-            sb.append(lastSlash == -1 ? desc : desc.substring(lastSlash + 1));
-        }
-    }
-
-    private static void appendStr(final StringBuilder sb, final String s) {
-        sb.append('\"');
-        for (int i = 0; i < s.length(); ++i) {
-            final char c = s.charAt(i);
-            if (c == '\n') {
-                sb.append("\\n");
-            } else if (c == '\r') {
-                sb.append("\\r");
-            } else if (c == '\\') {
-                sb.append("\\\\");
-            } else if (c == '"') {
-                sb.append("\\\"");
-            } else if (c < 0x20 || c > 0x7f) {
-                sb.append("\\u");
-                if (c < 0x10) {
-                    sb.append("000");
-                } else if (c < 0x100) {
-                    sb.append("00");
-                } else if (c < 0x1000) {
-                    sb.append('0');
-                }
-                sb.append(Integer.toString(c, 16));
-            } else {
-                sb.append(c);
-            }
-        }
-        sb.append('\"');
-    }
-
-    private static class Graph {
-        private final LinkedHashSet<String> nodes;
-        private final Map<String, StringBuilder> contents;
-        private final Map<String, Set<String>> edges;
-        private final Set<String> hasPreds;
-        private final Set<String> noFallThru;
-        private final Map<String, String> catches;
-        private final Map<String, Set<String>> exceptionMap; //maps catch nodes to all their trys that can reach them
-        private final String name;
-
-        private static final String LEFT_ALIGN      = "\\l";
-        private static final String COLOR_CATCH     = "\"#ee9999\"";
-        private static final String COLOR_ORPHAN    = "\"#9999bb\"";
-        private static final String COLOR_DEFAULT   = "\"#99bb99\"";
-        private static final String COLOR_LOCALVARS = "\"#999999\"";
-
-        Graph(final String name) {
-            this.name         = name;
-            this.nodes        = new LinkedHashSet<>();
-            this.contents     = new HashMap<>();
-            this.edges        = new HashMap<>();
-            this.hasPreds     = new HashSet<>();
-            this.catches      = new HashMap<>();
-            this.noFallThru   = new HashSet<>();
-            this.exceptionMap = new HashMap<>();
-         }
-
-        void addEdge(final String from, final String to) {
-            Set<String> edgeSet = edges.get(from);
-            if (edgeSet == null) {
-                edgeSet = new LinkedHashSet<>();
-                edges.put(from, edgeSet);
-            }
-            edgeSet.add(to);
-            hasPreds.add(to);
-        }
-
-        void addTryCatch(final String tryNode, final String catchNode) {
-            Set<String> tryNodes = exceptionMap.get(catchNode);
-            if (tryNodes == null) {
-                tryNodes = new HashSet<>();
-                exceptionMap.put(catchNode, tryNodes);
-            }
-            if (!tryNodes.contains(tryNode)) {
-                addEdge(tryNode, catchNode);
-            }
-            tryNodes.add(tryNode);
-        }
-
-        void addNode(final String node) {
-            assert !nodes.contains(node);
-            nodes.add(node);
-        }
-
-        void setNoFallThru(final String node) {
-            noFallThru.add(node);
-        }
-
-        boolean isNoFallThru(final String node) {
-            return noFallThru.contains(node);
-        }
-
-        void setIsCatch(final String node, final String exception) {
-            catches.put(node, exception);
-        }
-
-        String getName() {
-            return name;
-        }
-
-        void addText(final String node, final String text) {
-            StringBuilder sb = contents.get(node);
-            if (sb == null) {
-                sb = new StringBuilder();
-            }
-
-            for (int i = 0; i < text.length(); i++) {
-                switch (text.charAt(i)) {
-                case '\n':
-                    sb.append(LEFT_ALIGN);
-                    break;
-                case '"':
-                    sb.append("'");
-                    break;
-                default:
-                    sb.append(text.charAt(i));
-                    break;
-                }
-           }
-
-            contents.put(node, sb);
-        }
-
-        private static String dottyFriendly(final String name) {
-            return name.replace(':', '_');
-        }
-
-        @Override
-        public String toString() {
-
-            final StringBuilder sb = new StringBuilder();
-            sb.append("digraph ").append(dottyFriendly(name)).append(" {");
-            sb.append("\n");
-            sb.append("\tgraph [fontname=courier]\n");
-            sb.append("\tnode [style=filled,color="+COLOR_DEFAULT+",fontname=courier]\n");
-            sb.append("\tedge [fontname=courier]\n\n");
-
-            for (final String node : nodes) {
-                sb.append("\t");
-                sb.append(node);
-                sb.append(" [");
-                sb.append("id=");
-                sb.append(node);
-                sb.append(", label=\"");
-                String c = contents.get(node).toString();
-                if (c.startsWith(LEFT_ALIGN)) {
-                    c = c.substring(LEFT_ALIGN.length());
-                }
-                final String ex = catches.get(node);
-                if (ex != null) {
-                    sb.append("*** CATCH: ").append(ex).append(" ***\\l");
-                }
-                sb.append(c);
-                sb.append("\"]\n");
-            }
-
-            for (final String from : edges.keySet()) {
-                for (final String to : edges.get(from)) {
-                    sb.append("\t");
-                    sb.append(from);
-                    sb.append(" -> ");
-                    sb.append(to);
-                    sb.append("[label=\"");
-                    sb.append(to);
-                    sb.append("\"");
-                    if (catches.get(to) != null) {
-                        sb.append(", color=red, style=dashed");
-                    }
-                    sb.append(']');
-                    sb.append(";\n");
-                }
-            }
-
-            sb.append("\n");
-            for (final String node : nodes) {
-                sb.append("\t");
-                sb.append(node);
-                sb.append(" [shape=box");
-                if (catches.get(node) != null) {
-                    sb.append(", color=" + COLOR_CATCH);
-                } else if ("vars".equals(node)) {
-                    sb.append(", shape=hexagon, color=" + COLOR_LOCALVARS);
-                } else if (!hasPreds.contains(node)) {
-                    sb.append(", color=" + COLOR_ORPHAN);
-                }
-                sb.append("]\n");
-            }
-
-            sb.append("}\n");
-            return sb.toString();
-        }
-    }
-
-    static class NashornLabel extends Label {
-        final Label label;
-        final int   bci;
-        final int   opcode;
-
-        NashornLabel(final Label label, final int bci) {
-            this.label = label;
-            this.bci   = bci;
-            this.opcode = -1;
-        }
-
-        //not an ASM label
-        NashornLabel(final int opcode, final int bci) {
-            this.opcode = opcode;
-            this.bci = bci;
-            this.label = null;
-        }
-
-        Label getLabel() {
-            return label;
-        }
-
-        @Override
-        public int getOffset() {
-            return bci;
-        }
-
-        @Override
-        public String toString() {
-            return "label " + bci;
-        }
-    }
-
-    @Override
-    public Printer visitAnnotationDefault() {
-        throw new AssertionError();
-    }
-
-    @Override
-    public Printer visitClassAnnotation(final String arg0, final boolean arg1) {
-        return this;
-    }
-
-    @Override
-    public void visitClassAttribute(final Attribute arg0) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public Printer visitFieldAnnotation(final String arg0, final boolean arg1) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public void visitFieldAttribute(final Attribute arg0) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public Printer visitMethodAnnotation(final String arg0, final boolean arg1) {
-        return this;
-    }
-
-    @Override
-    public void visitMethodAttribute(final Attribute arg0) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public Printer visitParameterAnnotation(final int arg0, final String arg1, final boolean arg2) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public void visit(final String arg0, final Object arg1) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public Printer visitAnnotation(final String arg0, final String arg1) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public void visitAnnotationEnd() {
-        //empty
-    }
-
-    @Override
-    public Printer visitArray(final String arg0) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public void visitEnum(final String arg0, final String arg1, final String arg2) {
-        throw new AssertionError();
-    }
-
-    @Override
-    public void visitInnerClass(final String arg0, final String arg1, final String arg2, final int arg3) {
-        throw new AssertionError();
-    }
-}