hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@fe1a07c17681

     1 /**

     2  * Back 2 Browser Bytecode Translator

     3  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 2 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. Look for COPYING file in the top folder.

    16  * If not, see http://opensource.org/licenses/GPL-2.0.

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import org.apidesign.bck2brwsr.core.JavaScriptBody;

    23 import org.apidesign.javap.AnnotationParser;

    24 import org.apidesign.javap.ClassData;

    25 import org.apidesign.javap.FieldData;

    26 import org.apidesign.javap.MethodData;

    27 import org.apidesign.javap.StackMapIterator;

    28 import static org.apidesign.javap.RuntimeConstants.*;

    29 import org.apidesign.javap.TrapData;

    30 import org.apidesign.javap.TrapDataIterator;

    32 /** Translator of the code inside class files to JavaScript.

    33  *

    34  * @author Jaroslav Tulach <jtulach@netbeans.org>

    35  */

    36 abstract class ByteCodeToJavaScript {

    37     private ClassData jc;

    38     final Appendable out;

    40     protected ByteCodeToJavaScript(Appendable out) {

    41         this.out = out;

    42     }

    44     /* Collects additional required resources.

    45      *

    46      * @param internalClassName classes that were referenced and should be loaded in order the

    47      *   generated JavaScript code works properly. The names are in internal

    48      *   JVM form so String is <code>java/lang/String</code>.

    49      */

    50     protected abstract boolean requireReference(String internalClassName);

    52     /*

    53      * @param resourcePath name of resources to read

    54      */

    55     protected abstract void requireScript(String resourcePath);

    57     /** Allows subclasses to redefine what field a function representing a

    58      * class gets assigned. By default it returns the suggested name followed

    59      * by <code>" = "</code>;

    60      *

    61      * @param className suggested name of the class

    62      */

    63     /* protected */ String assignClass(String className) {

    64         return className + " = ";

    65     }

    66     /* protected */ String accessClass(String classOperation) {

    67         return classOperation;

    68     }

    70     /** Prints out a debug message.

    71      *

    72      * @param msg the message

    73      * @return true if the message has been printed

    74      * @throws IOException

    75      */

    76     boolean debug(String msg) throws IOException {

    77         out.append(msg);

    78         return true;

    79     }

    81     /**

    82      * Converts a given class file to a JavaScript version.

    83      *

    84      * @param classFile input stream with code of the .class file

    85      * @return the initialization code for this class, if any. Otherwise <code>null</code>

    86      *

    87      * @throws IOException if something goes wrong during read or write or translating

    88      */

    90     public String compile(InputStream classFile) throws IOException {

    91         this.jc = new ClassData(classFile);

    92         if (jc.getMajor_version() < 50) {

    93             throw new IOException("Can't compile " + jc.getClassName() + ". Class file version " + jc.getMajor_version() + "."

    94                 + jc.getMinor_version() + " - recompile with -target 1.6 (at least)."

    95             );

    96         }

    97         byte[] arrData = jc.findAnnotationData(true);

    98         String[] arr = findAnnotation(arrData, jc,

    99             "org.apidesign.bck2brwsr.core.ExtraJavaScript",

   100             "resource", "processByteCode"

   101         );

   102         if (arr != null) {

   103             requireScript(arr[0]);

   104             if ("0".equals(arr[1])) {

   105                 return null;

   106             }

   107         }

   108         String[] proto = findAnnotation(arrData, jc,

   109             "org.apidesign.bck2brwsr.core.JavaScriptPrototype",

   110             "container", "prototype"

   111         );

   112         StringArray toInitilize = new StringArray();

   113         final String className = className(jc);

   114         out.append("\n\n").append(assignClass(className));

   115         out.append("function CLS() {");

   116         out.append("\n  if (!CLS.prototype.$instOf_").append(className).append(") {");

   117         for (FieldData v : jc.getFields()) {

   118             if (v.isStatic()) {

   119                 out.append("\n  CLS.").append(v.getName()).append(initField(v));

   120             }

   121         }

   122         if (proto == null) {

   123             String sc = jc.getSuperClassName(); // with _

   124             out.append("\n    var pp = ").

   125                 append(accessClass(sc.replace('/', '_'))).append("(true);");

   126             out.append("\n    var p = CLS.prototype = pp;");

   127             out.append("\n    var c = p;");

   128             out.append("\n    var sprcls = pp.constructor.$class;");

   129         } else {

   130             out.append("\n    var p = CLS.prototype = ").append(proto[1]).append(";");

   131             if (proto[0] == null) {

   132                 proto[0] = "p";

   133             }

   134             out.append("\n    var c = ").append(proto[0]).append(";");

   135             out.append("\n    var sprcls = null;");

   136         }

   137         for (MethodData m : jc.getMethods()) {

   138             byte[] onlyArr = m.findAnnotationData(true);

   139             String[] only = findAnnotation(onlyArr, jc,

   140                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   141                 "name", "value"

   142             );

   143             if (only != null) {

   144                 if (only[0] != null && only[1] != null) {

   145                     out.append("\n    p.").append(only[0]).append(" = ")

   146                         .append(only[1]).append(";");

   147                 }

   148                 continue;

   149             }

   150             String prefix;

   151             String mn;

   152             if (m.isStatic()) {

   153                 prefix = "\n    c.";

   154                 mn = generateStaticMethod(prefix, m, toInitilize);

   155             } else {

   156                 if (m.isConstructor()) {

   157                     prefix = "\n    CLS.";

   158                     mn = generateInstanceMethod(prefix, m);

   159                 } else {

   160                     prefix = "\n    c.";

   161                     mn = generateInstanceMethod(prefix, m);

   162                 }

   163             }

   164             byte[] runAnno = m.findAnnotationData(false);

   165             if (runAnno != null) {

   166                 out.append(prefix).append(mn).append(".anno = {");

   167                 generateAnno(jc, out, runAnno);

   168                 out.append("\n    };");

   169             }

   170             out.append(prefix).append(mn).append(".access = " + m.getAccess()).append(";");

   171         }

   172         out.append("\n    c.constructor = CLS;");

   173         out.append("\n    c.$instOf_").append(className).append(" = true;");

   174         for (String superInterface : jc.getSuperInterfaces()) {

   175             out.append("\n    c.$instOf_").append(superInterface.replace('/', '_')).append(" = true;");

   176         }

   177         out.append("\n    CLS.$class = ");

   178         out.append(accessClass("java_lang_Class(true);"));

   179         out.append("\n    CLS.$class.jvmName = '").append(jc.getClassName()).append("';");

   180         out.append("\n    CLS.$class.superclass = sprcls;");

   181         out.append("\n    CLS.$class.access = ").append(jc.getAccessFlags()+";");

   182         out.append("\n    CLS.$class.cnstr = CLS;");

   183         byte[] classAnno = jc.findAnnotationData(false);

   184         if (classAnno != null) {

   185             out.append("\n    CLS.$class.anno = {");

   186             generateAnno(jc, out, classAnno);

   187             out.append("\n    };");

   188         }

   189         out.append("\n  }");

   190         out.append("\n  if (arguments.length === 0) {");

   191         out.append("\n    if (!(this instanceof CLS)) {");

   192         out.append("\n      return new CLS();");

   193         out.append("\n    }");

   194         for (FieldData v : jc.getFields()) {

   195             byte[] onlyArr = v.findAnnotationData(true);

   196             String[] only = findAnnotation(onlyArr, jc,

   197                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   198                 "name", "value"

   199             );

   200             if (only != null) {

   201                 if (only[0] != null && only[1] != null) {

   202                     out.append("\n    p.").append(only[0]).append(" = ")

   203                         .append(only[1]).append(";");

   204                 }

   205                 continue;

   206             }

   207             if (!v.isStatic()) {

   208                 out.append("\n    this.fld_").

   209                     append(v.getName()).append(initField(v));

   210             }

   211         }

   212         out.append("\n    return this;");

   213         out.append("\n  }");

   214         out.append("\n  return arguments[0] ? new CLS() : CLS.prototype;");

   215         out.append("\n}");

   216         StringBuilder sb = new StringBuilder();

   217         for (String init : toInitilize.toArray()) {

   218             sb.append("\n").append(init).append("();");

   219         }

   220         return sb.toString();

   221     }

   222     private String generateStaticMethod(String prefix, MethodData m, StringArray toInitilize) throws IOException {

   223         String jsb = javaScriptBody(prefix, m, true);

   224         if (jsb != null) {

   225             return jsb;

   226         }

   227         final String mn = findMethodName(m, new StringBuilder());

   228         if (mn.equals("class__V")) {

   229             toInitilize.add(accessClass(className(jc)) + "(false)." + mn);

   230         }

   231         generateMethod(prefix, mn, m);

   232         return mn;

   233     }

   235     private String generateInstanceMethod(String prefix, MethodData m) throws IOException {

   236         String jsb = javaScriptBody(prefix, m, false);

   237         if (jsb != null) {

   238             return jsb;

   239         }

   240         final String mn = findMethodName(m, new StringBuilder());

   241         generateMethod(prefix, mn, m);

   242         return mn;

   243     }

   245     private void generateMethod(String prefix, String name, MethodData m)

   246             throws IOException {

   247         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   248         TrapDataIterator trap = m.getTrapDataIterator();

   249         final LocalsMapper lmapper =

   250                 new LocalsMapper(stackMapIterator.getArguments());

   252         out.append(prefix).append(name).append(" = function(");

   253         lmapper.outputArguments(out, m.isStatic());

   254         out.append(") {").append("\n");

   256         final byte[] byteCodes = m.getCode();

   257         if (byteCodes == null) {

   258             out.append("  throw 'no code found for ")

   259                .append(jc.getClassName()).append('.')

   260                .append(m.getName()).append("';\n");

   261             out.append("};");

   262             return;

   263         }

   265         final StackMapper smapper = new StackMapper();

   267         if (!m.isStatic()) {

   268             out.append("  var ").append(" lcA0 = this;\n");

   269         }

   271         int lastStackFrame = -1;

   272         TrapData[] previousTrap = null;

   273         boolean wide = false;

   275         out.append("\n  var gt = 0;\n  for(;;) switch(gt) {\n");

   276         for (int i = 0; i < byteCodes.length; i++) {

   277             int prev = i;

   278             stackMapIterator.advanceTo(i);

   279             boolean changeInCatch = trap.advanceTo(i);

   280             if (changeInCatch || lastStackFrame != stackMapIterator.getFrameIndex()) {

   281                 if (previousTrap != null) {

   282                     generateCatch(previousTrap);

   283                     previousTrap = null;

   284                 }

   285             }

   286             if (lastStackFrame != stackMapIterator.getFrameIndex()) {

   287                 lastStackFrame = stackMapIterator.getFrameIndex();

   288                 lmapper.syncWithFrameLocals(stackMapIterator.getFrameLocals());

   289                 smapper.syncWithFrameStack(stackMapIterator.getFrameStack());

   290                 out.append("    case " + i).append(": ");

   291                 changeInCatch = true;

   292             } else {

   293                 debug("    /* " + i + " */ ");

   294             }

   295             if (changeInCatch && trap.useTry()) {

   296                 out.append("try {");

   297                 previousTrap = trap.current();

   298             }

   299             final int c = readUByte(byteCodes, i);

   300             switch (c) {

   301                 case opc_aload_0:

   302                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(0));

   303                     break;

   304                 case opc_iload_0:

   305                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(0));

   306                     break;

   307                 case opc_lload_0:

   308                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(0));

   309                     break;

   310                 case opc_fload_0:

   311                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(0));

   312                     break;

   313                 case opc_dload_0:

   314                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(0));

   315                     break;

   316                 case opc_aload_1:

   317                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(1));

   318                     break;

   319                 case opc_iload_1:

   320                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(1));

   321                     break;

   322                 case opc_lload_1:

   323                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(1));

   324                     break;

   325                 case opc_fload_1:

   326                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(1));

   327                     break;

   328                 case opc_dload_1:

   329                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(1));

   330                     break;

   331                 case opc_aload_2:

   332                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(2));

   333                     break;

   334                 case opc_iload_2:

   335                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(2));

   336                     break;

   337                 case opc_lload_2:

   338                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(2));

   339                     break;

   340                 case opc_fload_2:

   341                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(2));

   342                     break;

   343                 case opc_dload_2:

   344                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(2));

   345                     break;

   346                 case opc_aload_3:

   347                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(3));

   348                     break;

   349                 case opc_iload_3:

   350                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(3));

   351                     break;

   352                 case opc_lload_3:

   353                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(3));

   354                     break;

   355                 case opc_fload_3:

   356                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(3));

   357                     break;

   358                 case opc_dload_3:

   359                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(3));

   360                     break;

   361                 case opc_iload: {

   362                     ++i;

   363                     final int indx = wide ? readUShort(byteCodes, i++)

   364                                           : readUByte(byteCodes, i);

   365                     wide = false;

   366                     emit(out, "var @1 = @2;",

   367                          smapper.pushI(), lmapper.getI(indx));

   368                     break;

   369                 }

   370                 case opc_lload: {

   371                     ++i;

   372                     final int indx = wide ? readUShort(byteCodes, i++)

   373                                           : readUByte(byteCodes, i);

   374                     wide = false;

   375                     emit(out, "var @1 = @2;",

   376                          smapper.pushL(), lmapper.getL(indx));

   377                     break;

   378                 }

   379                 case opc_fload: {

   380                     ++i;

   381                     final int indx = wide ? readUShort(byteCodes, i++)

   382                                           : readUByte(byteCodes, i);

   383                     wide = false;

   384                     emit(out, "var @1 = @2;",

   385                          smapper.pushF(), lmapper.getF(indx));

   386                     break;

   387                 }

   388                 case opc_dload: {

   389                     ++i;

   390                     final int indx = wide ? readUShort(byteCodes, i++)

   391                                           : readUByte(byteCodes, i);

   392                     wide = false;

   393                     emit(out, "var @1 = @2;",

   394                          smapper.pushD(), lmapper.getD(indx));

   395                     break;

   396                 }

   397                 case opc_aload: {

   398                     ++i;

   399                     final int indx = wide ? readUShort(byteCodes, i++)

   400                                           : readUByte(byteCodes, i);

   401                     wide = false;

   402                     emit(out, "var @1 = @2;",

   403                          smapper.pushA(), lmapper.getA(indx));

   404                     break;

   405                 }

   406                 case opc_istore: {

   407                     ++i;

   408                     final int indx = wide ? readUShort(byteCodes, i++)

   409                                           : readUByte(byteCodes, i);

   410                     wide = false;

   411                     emit(out, "var @1 = @2;",

   412                          lmapper.setI(indx), smapper.popI());

   413                     break;

   414                 }

   415                 case opc_lstore: {

   416                     ++i;

   417                     final int indx = wide ? readUShort(byteCodes, i++)

   418                                           : readUByte(byteCodes, i);

   419                     wide = false;

   420                     emit(out, "var @1 = @2;",

   421                          lmapper.setL(indx), smapper.popL());

   422                     break;

   423                 }

   424                 case opc_fstore: {

   425                     ++i;

   426                     final int indx = wide ? readUShort(byteCodes, i++)

   427                                           : readUByte(byteCodes, i);

   428                     wide = false;

   429                     emit(out, "var @1 = @2;",

   430                          lmapper.setF(indx), smapper.popF());

   431                     break;

   432                 }

   433                 case opc_dstore: {

   434                     ++i;

   435                     final int indx = wide ? readUShort(byteCodes, i++)

   436                                           : readUByte(byteCodes, i);

   437                     wide = false;

   438                     emit(out, "var @1 = @2;",

   439                          lmapper.setD(indx), smapper.popD());

   440                     break;

   441                 }

   442                 case opc_astore: {

   443                     ++i;

   444                     final int indx = wide ? readUShort(byteCodes, i++)

   445                                           : readUByte(byteCodes, i);

   446                     wide = false;

   447                     emit(out, "var @1 = @2;",

   448                          lmapper.setA(indx), smapper.popA());

   449                     break;

   450                 }

   451                 case opc_astore_0:

   452                     emit(out, "var @1 = @2;", lmapper.setA(0), smapper.popA());

   453                     break;

   454                 case opc_istore_0:

   455                     emit(out, "var @1 = @2;", lmapper.setI(0), smapper.popI());

   456                     break;

   457                 case opc_lstore_0:

   458                     emit(out, "var @1 = @2;", lmapper.setL(0), smapper.popL());

   459                     break;

   460                 case opc_fstore_0:

   461                     emit(out, "var @1 = @2;", lmapper.setF(0), smapper.popF());

   462                     break;

   463                 case opc_dstore_0:

   464                     emit(out, "var @1 = @2;", lmapper.setD(0), smapper.popD());

   465                     break;

   466                 case opc_astore_1:

   467                     emit(out, "var @1 = @2;", lmapper.setA(1), smapper.popA());

   468                     break;

   469                 case opc_istore_1:

   470                     emit(out, "var @1 = @2;", lmapper.setI(1), smapper.popI());

   471                     break;

   472                 case opc_lstore_1:

   473                     emit(out, "var @1 = @2;", lmapper.setL(1), smapper.popL());

   474                     break;

   475                 case opc_fstore_1:

   476                     emit(out, "var @1 = @2;", lmapper.setF(1), smapper.popF());

   477                     break;

   478                 case opc_dstore_1:

   479                     emit(out, "var @1 = @2;", lmapper.setD(1), smapper.popD());

   480                     break;

   481                 case opc_astore_2:

   482                     emit(out, "var @1 = @2;", lmapper.setA(2), smapper.popA());

   483                     break;

   484                 case opc_istore_2:

   485                     emit(out, "var @1 = @2;", lmapper.setI(2), smapper.popI());

   486                     break;

   487                 case opc_lstore_2:

   488                     emit(out, "var @1 = @2;", lmapper.setL(2), smapper.popL());

   489                     break;

   490                 case opc_fstore_2:

   491                     emit(out, "var @1 = @2;", lmapper.setF(2), smapper.popF());

   492                     break;

   493                 case opc_dstore_2:

   494                     emit(out, "var @1 = @2;", lmapper.setD(2), smapper.popD());

   495                     break;

   496                 case opc_astore_3:

   497                     emit(out, "var @1 = @2;", lmapper.setA(3), smapper.popA());

   498                     break;

   499                 case opc_istore_3:

   500                     emit(out, "var @1 = @2;", lmapper.setI(3), smapper.popI());

   501                     break;

   502                 case opc_lstore_3:

   503                     emit(out, "var @1 = @2;", lmapper.setL(3), smapper.popL());

   504                     break;

   505                 case opc_fstore_3:

   506                     emit(out, "var @1 = @2;", lmapper.setF(3), smapper.popF());

   507                     break;

   508                 case opc_dstore_3:

   509                     emit(out, "var @1 = @2;", lmapper.setD(3), smapper.popD());

   510                     break;

   511                 case opc_iadd:

   512                     emit(out, "@1 = @1.add32(@2);", smapper.getI(1), smapper.popI());

   513                     break;

   514                 case opc_ladd:

   515                     emit(out, "@1 += @2;", smapper.getL(1), smapper.popL());

   516                     break;

   517                 case opc_fadd:

   518                     emit(out, "@1 += @2;", smapper.getF(1), smapper.popF());

   519                     break;

   520                 case opc_dadd:

   521                     emit(out, "@1 += @2;", smapper.getD(1), smapper.popD());

   522                     break;

   523                 case opc_isub:

   524                     emit(out, "@1 = @1.sub32(@2);", smapper.getI(1), smapper.popI());

   525                     break;

   526                 case opc_lsub:

   527                     emit(out, "@1 -= @2;", smapper.getL(1), smapper.popL());

   528                     break;

   529                 case opc_fsub:

   530                     emit(out, "@1 -= @2;", smapper.getF(1), smapper.popF());

   531                     break;

   532                 case opc_dsub:

   533                     emit(out, "@1 -= @2;", smapper.getD(1), smapper.popD());

   534                     break;

   535                 case opc_imul:

   536                     emit(out, "@1 = @1.mul32(@2);", smapper.getI(1), smapper.popI());

   537                     break;

   538                 case opc_lmul:

   539                     emit(out, "@1 *= @2;", smapper.getL(1), smapper.popL());

   540                     break;

   541                 case opc_fmul:

   542                     emit(out, "@1 *= @2;", smapper.getF(1), smapper.popF());

   543                     break;

   544                 case opc_dmul:

   545                     emit(out, "@1 *= @2;", smapper.getD(1), smapper.popD());

   546                     break;

   547                 case opc_idiv:

   548                     emit(out, "@1 = Math.floor(@1 / @2);",

   549                          smapper.getI(1), smapper.popI());

   550                     break;

   551                 case opc_ldiv:

   552                     emit(out, "@1 = Math.floor(@1 / @2);",

   553                          smapper.getL(1), smapper.popL());

   554                     break;

   555                 case opc_fdiv:

   556                     emit(out, "@1 /= @2;", smapper.getF(1), smapper.popF());

   557                     break;

   558                 case opc_ddiv:

   559                     emit(out, "@1 /= @2;", smapper.getD(1), smapper.popD());

   560                     break;

   561                 case opc_irem:

   562                     emit(out, "@1 %= @2;", smapper.getI(1), smapper.popI());

   563                     break;

   564                 case opc_lrem:

   565                     emit(out, "@1 %= @2;", smapper.getL(1), smapper.popL());

   566                     break;

   567                 case opc_frem:

   568                     emit(out, "@1 %= @2;", smapper.getF(1), smapper.popF());

   569                     break;

   570                 case opc_drem:

   571                     emit(out, "@1 %= @2;", smapper.getD(1), smapper.popD());

   572                     break;

   573                 case opc_iand:

   574                     emit(out, "@1 &= @2;", smapper.getI(1), smapper.popI());

   575                     break;

   576                 case opc_land:

   577                     emit(out, "@1 &= @2;", smapper.getL(1), smapper.popL());

   578                     break;

   579                 case opc_ior:

   580                     emit(out, "@1 |= @2;", smapper.getI(1), smapper.popI());

   581                     break;

   582                 case opc_lor:

   583                     emit(out, "@1 |= @2;", smapper.getL(1), smapper.popL());

   584                     break;

   585                 case opc_ixor:

   586                     emit(out, "@1 ^= @2;", smapper.getI(1), smapper.popI());

   587                     break;

   588                 case opc_lxor:

   589                     emit(out, "@1 ^= @2;", smapper.getL(1), smapper.popL());

   590                     break;

   591                 case opc_ineg:

   592                     emit(out, "@1 = -@1;", smapper.getI(0));

   593                     break;

   594                 case opc_lneg:

   595                     emit(out, "@1 = -@1;", smapper.getL(0));

   596                     break;

   597                 case opc_fneg:

   598                     emit(out, "@1 = -@1;", smapper.getF(0));

   599                     break;

   600                 case opc_dneg:

   601                     emit(out, "@1 = -@1;", smapper.getD(0));

   602                     break;

   603                 case opc_ishl:

   604                     emit(out, "@1 <<= @2;", smapper.getI(1), smapper.popI());

   605                     break;

   606                 case opc_lshl:

   607                     emit(out, "@1 <<= @2;", smapper.getL(1), smapper.popI());

   608                     break;

   609                 case opc_ishr:

   610                     emit(out, "@1 >>= @2;", smapper.getI(1), smapper.popI());

   611                     break;

   612                 case opc_lshr:

   613                     emit(out, "@1 >>= @2;", smapper.getL(1), smapper.popI());

   614                     break;

   615                 case opc_iushr:

   616                     emit(out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());

   617                     break;

   618                 case opc_lushr:

   619                     emit(out, "@1 >>>= @2;", smapper.getL(1), smapper.popI());

   620                     break;

   621                 case opc_iinc: {

   622                     ++i;

   623                     final int varIndx = wide ? readUShort(byteCodes, i++)

   624                                              : readUByte(byteCodes, i);

   625                     ++i;

   626                     final int incrBy = wide ? readIntArg(byteCodes, i++)

   627                                             : byteCodes[i];

   628                     wide = false;

   629                     if (incrBy == 1) {

   630                         emit(out, "@1++;", lmapper.getI(varIndx));

   631                     } else {

   632                         emit(out, "@1 += @2;",

   633                              lmapper.getI(varIndx),

   634                              Integer.toString(incrBy));

   635                     }

   636                     break;

   637                 }

   638                 case opc_return:

   639                     emit(out, "return;");

   640                     break;

   641                 case opc_ireturn:

   642                     emit(out, "return @1;", smapper.popI());

   643                     break;

   644                 case opc_lreturn:

   645                     emit(out, "return @1;", smapper.popL());

   646                     break;

   647                 case opc_freturn:

   648                     emit(out, "return @1;", smapper.popF());

   649                     break;

   650                 case opc_dreturn:

   651                     emit(out, "return @1;", smapper.popD());

   652                     break;

   653                 case opc_areturn:

   654                     emit(out, "return @1;", smapper.popA());

   655                     break;

   656                 case opc_i2l:

   657                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushL());

   658                     break;

   659                 case opc_i2f:

   660                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushF());

   661                     break;

   662                 case opc_i2d:

   663                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushD());

   664                     break;

   665                 case opc_l2i:

   666                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushI());

   667                     break;

   668                     // max int check?

   669                 case opc_l2f:

   670                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushF());

   671                     break;

   672                 case opc_l2d:

   673                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushD());

   674                     break;

   675                 case opc_f2d:

   676                     emit(out, "var @2 = @1;", smapper.popF(), smapper.pushD());

   677                     break;

   678                 case opc_d2f:

   679                     emit(out, "var @2 = @1;", smapper.popD(), smapper.pushF());

   680                     break;

   681                 case opc_f2i:

   682                     emit(out, "var @2 = Math.floor(@1);",

   683                          smapper.popF(), smapper.pushI());

   684                     break;

   685                 case opc_f2l:

   686                     emit(out, "var @2 = Math.floor(@1);",

   687                          smapper.popF(), smapper.pushL());

   688                     break;

   689                 case opc_d2i:

   690                     emit(out, "var @2 = Math.floor(@1);",

   691                          smapper.popD(), smapper.pushI());

   692                     break;

   693                 case opc_d2l:

   694                     emit(out, "var @2 = Math.floor(@1);",

   695                          smapper.popD(), smapper.pushL());

   696                     break;

   697                 case opc_i2b:

   698                     emit(out, "var @1 = @1.toInt8();", smapper.getI(0));

   699                     break;

   700                 case opc_i2c:

   701                     out.append("{ /* number conversion */ }");

   702                     break;

   703                 case opc_i2s:

   704                     emit(out, "var @1 = @1.toInt16();", smapper.getI(0));

   705                     break;

   706                 case opc_aconst_null:

   707                     emit(out, "var @1 = null;", smapper.pushA());

   708                     break;

   709                 case opc_iconst_m1:

   710                     emit(out, "var @1 = -1;", smapper.pushI());

   711                     break;

   712                 case opc_iconst_0:

   713                     emit(out, "var @1 = 0;", smapper.pushI());

   714                     break;

   715                 case opc_dconst_0:

   716                     emit(out, "var @1 = 0;", smapper.pushD());

   717                     break;

   718                 case opc_lconst_0:

   719                     emit(out, "var @1 = 0;", smapper.pushL());

   720                     break;

   721                 case opc_fconst_0:

   722                     emit(out, "var @1 = 0;", smapper.pushF());

   723                     break;

   724                 case opc_iconst_1:

   725                     emit(out, "var @1 = 1;", smapper.pushI());

   726                     break;

   727                 case opc_lconst_1:

   728                     emit(out, "var @1 = 1;", smapper.pushL());

   729                     break;

   730                 case opc_fconst_1:

   731                     emit(out, "var @1 = 1;", smapper.pushF());

   732                     break;

   733                 case opc_dconst_1:

   734                     emit(out, "var @1 = 1;", smapper.pushD());

   735                     break;

   736                 case opc_iconst_2:

   737                     emit(out, "var @1 = 2;", smapper.pushI());

   738                     break;

   739                 case opc_fconst_2:

   740                     emit(out, "var @1 = 2;", smapper.pushF());

   741                     break;

   742                 case opc_iconst_3:

   743                     emit(out, "var @1 = 3;", smapper.pushI());

   744                     break;

   745                 case opc_iconst_4:

   746                     emit(out, "var @1 = 4;", smapper.pushI());

   747                     break;

   748                 case opc_iconst_5:

   749                     emit(out, "var @1 = 5;", smapper.pushI());

   750                     break;

   751                 case opc_ldc: {

   752                     int indx = readUByte(byteCodes, ++i);

   753                     String v = encodeConstant(indx);

   754                     int type = VarType.fromConstantType(jc.getTag(indx));

   755                     emit(out, "var @1 = @2;", smapper.pushT(type), v);

   756                     break;

   757                 }

   758                 case opc_ldc_w:

   759                 case opc_ldc2_w: {

   760                     int indx = readIntArg(byteCodes, i);

   761                     i += 2;

   762                     String v = encodeConstant(indx);

   763                     int type = VarType.fromConstantType(jc.getTag(indx));

   764                     emit(out, "var @1 = @2;", smapper.pushT(type), v);

   765                     break;

   766                 }

   767                 case opc_lcmp:

   768                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   769                          smapper.popL(), smapper.popL(), smapper.pushI());

   770                     break;

   771                 case opc_fcmpl:

   772                 case opc_fcmpg:

   773                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   774                          smapper.popF(), smapper.popF(), smapper.pushI());

   775                     break;

   776                 case opc_dcmpl:

   777                 case opc_dcmpg:

   778                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   779                          smapper.popD(), smapper.popD(), smapper.pushI());

   780                     break;

   781                 case opc_if_acmpeq:

   782                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   783                                    "===");

   784                     break;

   785                 case opc_if_acmpne:

   786                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   787                                    "!=");

   788                     break;

   789                 case opc_if_icmpeq:

   790                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   791                                    "==");

   792                     break;

   793                 case opc_ifeq: {

   794                     int indx = i + readIntArg(byteCodes, i);

   795                     emit(out, "if (@1 == 0) { gt = @2; continue; }",

   796                          smapper.popI(), Integer.toString(indx));

   797                     i += 2;

   798                     break;

   799                 }

   800                 case opc_ifne: {

   801                     int indx = i + readIntArg(byteCodes, i);

   802                     emit(out, "if (@1 != 0) { gt = @2; continue; }",

   803                          smapper.popI(), Integer.toString(indx));

   804                     i += 2;

   805                     break;

   806                 }

   807                 case opc_iflt: {

   808                     int indx = i + readIntArg(byteCodes, i);

   809                     emit(out, "if (@1 < 0) { gt = @2; continue; }",

   810                          smapper.popI(), Integer.toString(indx));

   811                     i += 2;

   812                     break;

   813                 }

   814                 case opc_ifle: {

   815                     int indx = i + readIntArg(byteCodes, i);

   816                     emit(out, "if (@1 <= 0) { gt = @2; continue; }",

   817                          smapper.popI(), Integer.toString(indx));

   818                     i += 2;

   819                     break;

   820                 }

   821                 case opc_ifgt: {

   822                     int indx = i + readIntArg(byteCodes, i);

   823                     emit(out, "if (@1 > 0) { gt = @2; continue; }",

   824                          smapper.popI(), Integer.toString(indx));

   825                     i += 2;

   826                     break;

   827                 }

   828                 case opc_ifge: {

   829                     int indx = i + readIntArg(byteCodes, i);

   830                     emit(out, "if (@1 >= 0) { gt = @2; continue; }",

   831                          smapper.popI(), Integer.toString(indx));

   832                     i += 2;

   833                     break;

   834                 }

   835                 case opc_ifnonnull: {

   836                     int indx = i + readIntArg(byteCodes, i);

   837                     emit(out, "if (@1 !== null) { gt = @2; continue; }",

   838                          smapper.popA(), Integer.toString(indx));

   839                     i += 2;

   840                     break;

   841                 }

   842                 case opc_ifnull: {

   843                     int indx = i + readIntArg(byteCodes, i);

   844                     emit(out, "if (@1 === null) { gt = @2; continue; }",

   845                          smapper.popA(), Integer.toString(indx));

   846                     i += 2;

   847                     break;

   848                 }

   849                 case opc_if_icmpne:

   850                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   851                                    "!=");

   852                     break;

   853                 case opc_if_icmplt:

   854                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   855                                    "<");

   856                     break;

   857                 case opc_if_icmple:

   858                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   859                                    "<=");

   860                     break;

   861                 case opc_if_icmpgt:

   862                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   863                                    ">");

   864                     break;

   865                 case opc_if_icmpge:

   866                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   867                                    ">=");

   868                     break;

   869                 case opc_goto: {

   870                     int indx = i + readIntArg(byteCodes, i);

   871                     emit(out, "gt = @1; continue;", Integer.toString(indx));

   872                     i += 2;

   873                     break;

   874                 }

   875                 case opc_lookupswitch: {

   876                     int table = i / 4 * 4 + 4;

   877                     int dflt = i + readInt4(byteCodes, table);

   878                     table += 4;

   879                     int n = readInt4(byteCodes, table);

   880                     table += 4;

   881                     out.append("switch (").append(smapper.popI()).append(") {\n");

   882                     while (n-- > 0) {

   883                         int cnstnt = readInt4(byteCodes, table);

   884                         table += 4;

   885                         int offset = i + readInt4(byteCodes, table);

   886                         table += 4;

   887                         out.append("  case " + cnstnt).append(": gt = " + offset).append("; continue;\n");

   888                     }

   889                     out.append("  default: gt = " + dflt).append("; continue;\n}");

   890                     i = table - 1;

   891                     break;

   892                 }

   893                 case opc_tableswitch: {

   894                     int table = i / 4 * 4 + 4;

   895                     int dflt = i + readInt4(byteCodes, table);

   896                     table += 4;

   897                     int low = readInt4(byteCodes, table);

   898                     table += 4;

   899                     int high = readInt4(byteCodes, table);

   900                     table += 4;

   901                     out.append("switch (").append(smapper.popI()).append(") {\n");

   902                     while (low <= high) {

   903                         int offset = i + readInt4(byteCodes, table);

   904                         table += 4;

   905                         out.append("  case " + low).append(": gt = " + offset).append("; continue;\n");

   906                         low++;

   907                     }

   908                     out.append("  default: gt = " + dflt).append("; continue;\n}");

   909                     i = table - 1;

   910                     break;

   911                 }

   912                 case opc_invokeinterface: {

   913                     i = invokeVirtualMethod(byteCodes, i, smapper) + 2;

   914                     break;

   915                 }

   916                 case opc_invokevirtual:

   917                     i = invokeVirtualMethod(byteCodes, i, smapper);

   918                     break;

   919                 case opc_invokespecial:

   920                     i = invokeStaticMethod(byteCodes, i, smapper, false);

   921                     break;

   922                 case opc_invokestatic:

   923                     i = invokeStaticMethod(byteCodes, i, smapper, true);

   924                     break;

   925                 case opc_new: {

   926                     int indx = readIntArg(byteCodes, i);

   927                     String ci = jc.getClassName(indx);

   928                     emit(out, "var @1 = new @2;",

   929                          smapper.pushA(), accessClass(ci.replace('/', '_')));

   930                     addReference(ci);

   931                     i += 2;

   932                     break;

   933                 }

   934                 case opc_newarray:

   935                     int atype = readUByte(byteCodes, ++i);

   936                     String jvmType;

   937                     switch (atype) {

   938                         case 4: jvmType = "[Z"; break;

   939                         case 5: jvmType = "[C"; break;

   940                         case 6: jvmType = "[F"; break;

   941                         case 7: jvmType = "[D"; break;

   942                         case 8: jvmType = "[B"; break;

   943                         case 9: jvmType = "[S"; break;

   944                         case 10: jvmType = "[I"; break;

   945                         case 11: jvmType = "[J"; break;

   946                         default: throw new IllegalStateException("Array type: " + atype);

   947                     }

   948                     emit(out, "var @2 = new Array(@1).initWith('@3', 0);",

   949                          smapper.popI(), smapper.pushA(), jvmType);

   950                     break;

   951                 case opc_anewarray: {

   952                     int type = readIntArg(byteCodes, i);

   953                     i += 2;

   954                     String typeName = jc.getClassName(type);

   955                     if (typeName.startsWith("[")) {

   956                         typeName = "[" + typeName;

   957                     } else {

   958                         typeName = "[L" + typeName + ";";

   959                     }

   960                     emit(out, "var @2 = new Array(@1).initWith('@3', null);",

   961                          smapper.popI(), smapper.pushA(), typeName);

   962                     break;

   963                 }

   964                 case opc_multianewarray: {

   965                     int type = readIntArg(byteCodes, i);

   966                     i += 2;

   967                     String typeName = jc.getClassName(type);

   968                     int dim = readUByte(byteCodes, ++i);

   969                     out.append("{ var a0 = new Array(").append(smapper.popI())

   970                        .append(").initWith('").append(typeName).append("', null);");

   971                     for (int d = 1; d < dim; d++) {

   972                         typeName = typeName.substring(1);

   973                         out.append("\n  var l" + d).append(" = ")

   974                            .append(smapper.popI()).append(';');

   975                         out.append("\n  for (var i" + d).append (" = 0; i" + d).

   976                             append(" < a" + (d - 1)).

   977                             append(".length; i" + d).append("++) {");

   978                         out.append("\n    var a" + d).

   979                             append (" = new Array(l" + d).append(").initWith('")

   980                             .append(typeName).append("', ")

   981                             .append(typeName.length() == 2 ? "0" : "null").append(");");

   982                         out.append("\n    a" + (d - 1)).append("[i" + d).append("] = a" + d).

   983                             append(";");

   984                     }

   985                     for (int d = 1; d < dim; d++) {

   986                         out.append("\n  }");

   987                     }

   988                     out.append("\nvar ").append(smapper.pushA())

   989                                         .append(" = a0; }");

   990                     break;

   991                 }

   992                 case opc_arraylength:

   993                     emit(out, "var @2 = @1.length;",

   994                          smapper.popA(), smapper.pushI());

   995                     break;

   996                 case opc_lastore:

   997                     emit(out, "@3.at(@2, @1);",

   998                          smapper.popL(), smapper.popI(), smapper.popA());

   999                     break;

  1000                 case opc_fastore:

  1001                     emit(out, "@3.at(@2, @1);",

  1002                          smapper.popF(), smapper.popI(), smapper.popA());

  1003                     break;

  1004                 case opc_dastore:

  1005                     emit(out, "@3.at(@2, @1);",

  1006                          smapper.popD(), smapper.popI(), smapper.popA());

  1007                     break;

  1008                 case opc_aastore:

  1009                     emit(out, "@3.at(@2, @1);",

  1010                          smapper.popA(), smapper.popI(), smapper.popA());

  1011                     break;

  1012                 case opc_iastore:

  1013                 case opc_bastore:

  1014                 case opc_castore:

  1015                 case opc_sastore:

  1016                     emit(out, "@3.at(@2, @1);",

  1017                          smapper.popI(), smapper.popI(), smapper.popA());

  1018                     break;

  1019                 case opc_laload:

  1020                     emit(out, "var @3 = @2.at(@1);",

  1021                          smapper.popI(), smapper.popA(), smapper.pushL());

  1022                     break;

  1023                 case opc_faload:

  1024                     emit(out, "var @3 = @2.at(@1);",

  1025                          smapper.popI(), smapper.popA(), smapper.pushF());

  1026                     break;

  1027                 case opc_daload:

  1028                     emit(out, "var @3 = @2.at(@1);",

  1029                          smapper.popI(), smapper.popA(), smapper.pushD());

  1030                     break;

  1031                 case opc_aaload:

  1032                     emit(out, "var @3 = @2.at(@1);",

  1033                          smapper.popI(), smapper.popA(), smapper.pushA());

  1034                     break;

  1035                 case opc_iaload:

  1036                 case opc_baload:

  1037                 case opc_caload:

  1038                 case opc_saload:

  1039                     emit(out, "var @3 = @2.at(@1);",

  1040                          smapper.popI(), smapper.popA(), smapper.pushI());

  1041                     break;

  1042                 case opc_pop:

  1043                 case opc_pop2:

  1044                     smapper.pop(1);

  1045                     debug("/* pop */");

  1046                     break;

  1047                 case opc_dup: {

  1048                     final Variable v = smapper.get(0);

  1049                     emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1050                     break;

  1051                 }

  1052                 case opc_dup2: {

  1053                     final Variable vi1 = smapper.get(0);

  1055                     if (vi1.isCategory2()) {

  1056                         emit(out, "var @1 = @2;",

  1057                              smapper.pushT(vi1.getType()), vi1);

  1058                     } else {

  1059                         final Variable vi2 = smapper.get(1);

  1060                         emit(out, "var @1 = @2, @3 = @4;",

  1061                              smapper.pushT(vi2.getType()), vi2,

  1062                              smapper.pushT(vi1.getType()), vi1);

  1063                     }

  1064                     break;

  1065                 }

  1066                 case opc_dup_x1: {

  1067                     final Variable vi1 = smapper.pop();

  1068                     final Variable vi2 = smapper.pop();

  1069                     final Variable vo3 = smapper.pushT(vi1.getType());

  1070                     final Variable vo2 = smapper.pushT(vi2.getType());

  1071                     final Variable vo1 = smapper.pushT(vi1.getType());

  1073                     emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1074                          vo1, vi1, vo2, vi2, vo3, vo1);

  1075                     break;

  1076                 }

  1077                 case opc_dup2_x1: {

  1078                     final Variable vi1 = smapper.pop();

  1079                     final Variable vi2 = smapper.pop();

  1081                     if (vi1.isCategory2()) {

  1082                         final Variable vo3 = smapper.pushT(vi1.getType());

  1083                         final Variable vo2 = smapper.pushT(vi2.getType());

  1084                         final Variable vo1 = smapper.pushT(vi1.getType());

  1086                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1087                              vo1, vi1, vo2, vi2, vo3, vo1);

  1088                     } else {

  1089                         final Variable vi3 = smapper.pop();

  1090                         final Variable vo5 = smapper.pushT(vi2.getType());

  1091                         final Variable vo4 = smapper.pushT(vi1.getType());

  1092                         final Variable vo3 = smapper.pushT(vi3.getType());

  1093                         final Variable vo2 = smapper.pushT(vi2.getType());

  1094                         final Variable vo1 = smapper.pushT(vi1.getType());

  1096                         emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1097                              vo1, vi1, vo2, vi2, vo3, vi3);

  1098                         emit(out, " @1 = @2, @3 = @4;",

  1099                              vo4, vo1, vo5, vo2);

  1100                     }

  1101                     break;

  1102                 }

  1103                 case opc_dup_x2: {

  1104                     final Variable vi1 = smapper.pop();

  1105                     final Variable vi2 = smapper.pop();

  1107                     if (vi2.isCategory2()) {

  1108                         final Variable vo3 = smapper.pushT(vi1.getType());

  1109                         final Variable vo2 = smapper.pushT(vi2.getType());

  1110                         final Variable vo1 = smapper.pushT(vi1.getType());

  1112                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1113                              vo1, vi1, vo2, vi2, vo3, vo1);

  1114                     } else {

  1115                         final Variable vi3 = smapper.pop();

  1116                         final Variable vo4 = smapper.pushT(vi1.getType());

  1117                         final Variable vo3 = smapper.pushT(vi3.getType());

  1118                         final Variable vo2 = smapper.pushT(vi2.getType());

  1119                         final Variable vo1 = smapper.pushT(vi1.getType());

  1121                         emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1122                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1123                     }

  1124                     break;

  1125                 }

  1126                 case opc_dup2_x2: {

  1127                     final Variable vi1 = smapper.pop();

  1128                     final Variable vi2 = smapper.pop();

  1130                     if (vi1.isCategory2()) {

  1131                         if (vi2.isCategory2()) {

  1132                             final Variable vo3 = smapper.pushT(vi1.getType());

  1133                             final Variable vo2 = smapper.pushT(vi2.getType());

  1134                             final Variable vo1 = smapper.pushT(vi1.getType());

  1136                             emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1137                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1138                         } else {

  1139                             final Variable vi3 = smapper.pop();

  1140                             final Variable vo4 = smapper.pushT(vi1.getType());

  1141                             final Variable vo3 = smapper.pushT(vi3.getType());

  1142                             final Variable vo2 = smapper.pushT(vi2.getType());

  1143                             final Variable vo1 = smapper.pushT(vi1.getType());

  1145                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1146                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1147                         }

  1148                     } else {

  1149                         final Variable vi3 = smapper.pop();

  1151                         if (vi3.isCategory2()) {

  1152                             final Variable vo5 = smapper.pushT(vi2.getType());

  1153                             final Variable vo4 = smapper.pushT(vi1.getType());

  1154                             final Variable vo3 = smapper.pushT(vi3.getType());

  1155                             final Variable vo2 = smapper.pushT(vi2.getType());

  1156                             final Variable vo1 = smapper.pushT(vi1.getType());

  1158                             emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1159                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1160                             emit(out, " @1 = @2, @3 = @4;",

  1161                                  vo4, vo1, vo5, vo2);

  1162                         } else {

  1163                             final Variable vi4 = smapper.pop();

  1164                             final Variable vo6 = smapper.pushT(vi2.getType());

  1165                             final Variable vo5 = smapper.pushT(vi1.getType());

  1166                             final Variable vo4 = smapper.pushT(vi4.getType());

  1167                             final Variable vo3 = smapper.pushT(vi3.getType());

  1168                             final Variable vo2 = smapper.pushT(vi2.getType());

  1169                             final Variable vo1 = smapper.pushT(vi1.getType());

  1171                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1172                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1173                             emit(out, " @1 = @2, @3 = @4;",

  1174                                  vo5, vo1, vo6, vo2);

  1175                         }

  1176                     }

  1177                     break;

  1178                 }

  1179                 case opc_swap: {

  1180                     final Variable vi1 = smapper.get(0);

  1181                     final Variable vi2 = smapper.get(1);

  1183                     if (vi1.getType() == vi2.getType()) {

  1184                         final Variable tmp = smapper.pushT(vi1.getType());

  1186                         emit(out, "var @1 = @2, @2 = @3, @3 = @1;",

  1187                              tmp, vi1, vi2);

  1188                         smapper.pop(1);

  1189                     } else {

  1190                         smapper.pop(2);

  1191                         smapper.pushT(vi1.getType());

  1192                         smapper.pushT(vi2.getType());

  1193                     }

  1194                     break;

  1195                 }

  1196                 case opc_bipush:

  1197                     emit(out, "var @1 = @2;",

  1198                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1199                     break;

  1200                 case opc_sipush:

  1201                     emit(out, "var @1 = @2;",

  1202                          smapper.pushI(),

  1203                          Integer.toString(readIntArg(byteCodes, i)));

  1204                     i += 2;

  1205                     break;

  1206                 case opc_getfield: {

  1207                     int indx = readIntArg(byteCodes, i);

  1208                     String[] fi = jc.getFieldInfoName(indx);

  1209                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1210                     emit(out, "var @2 = @1.fld_@3;",

  1211                          smapper.popA(), smapper.pushT(type), fi[1]);

  1212                     i += 2;

  1213                     break;

  1214                 }

  1215                 case opc_getstatic: {

  1216                     int indx = readIntArg(byteCodes, i);

  1217                     String[] fi = jc.getFieldInfoName(indx);

  1218                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1219                     emit(out, "var @1 = @2(false).constructor.@3;",

  1220                          smapper.pushT(type),

  1221                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1222                     i += 2;

  1223                     addReference(fi[0]);

  1224                     break;

  1225                 }

  1226                 case opc_putfield: {

  1227                     int indx = readIntArg(byteCodes, i);

  1228                     String[] fi = jc.getFieldInfoName(indx);

  1229                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1230                     emit(out, "@2.fld_@3 = @1;",

  1231                          smapper.popT(type), smapper.popA(), fi[1]);

  1232                     i += 2;

  1233                     break;

  1234                 }

  1235                 case opc_putstatic: {

  1236                     int indx = readIntArg(byteCodes, i);

  1237                     String[] fi = jc.getFieldInfoName(indx);

  1238                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1239                     emit(out, "@1(false).constructor.@2 = @3;",

  1240                          accessClass(fi[0].replace('/', '_')), fi[1],

  1241                          smapper.popT(type));

  1242                     i += 2;

  1243                     addReference(fi[0]);

  1244                     break;

  1245                 }

  1246                 case opc_checkcast: {

  1247                     int indx = readIntArg(byteCodes, i);

  1248                     final String type = jc.getClassName(indx);

  1249                     if (!type.startsWith("[")) {

  1250                         // no way to check arrays right now

  1251                         // XXX proper exception

  1252                         emit(out,

  1253                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1254                              smapper.getA(0), type.replace('/', '_'));

  1255                     }

  1256                     i += 2;

  1257                     break;

  1258                 }

  1259                 case opc_instanceof: {

  1260                     int indx = readIntArg(byteCodes, i);

  1261                     final String type = jc.getClassName(indx);

  1262                     emit(out, "var @2 = @1.$instOf_@3 ? 1 : 0;",

  1263                          smapper.popA(), smapper.pushI(),

  1264                          type.replace('/', '_'));

  1265                     i += 2;

  1266                     break;

  1267                 }

  1268                 case opc_athrow: {

  1269                     final Variable v = smapper.popA();

  1270                     smapper.clear();

  1272                     emit(out, "{ var @1 = @2; throw @2; }",

  1273                          smapper.pushA(), v);

  1274                     break;

  1275                 }

  1277                 case opc_monitorenter: {

  1278                     out.append("/* monitor enter */");

  1279                     smapper.popA();

  1280                     break;

  1281                 }

  1283                 case opc_monitorexit: {

  1284                     out.append("/* monitor exit */");

  1285                     smapper.popA();

  1286                     break;

  1287                 }

  1289                 case opc_wide:

  1290                     wide = true;

  1291                     break;

  1293                 default: {

  1294                     wide = false;

  1295                     emit(out, "throw 'unknown bytecode @1';",

  1296                          Integer.toString(c));

  1297                 }

  1298             }

  1299             if (debug(" //")) {

  1300                 for (int j = prev; j <= i; j++) {

  1301                     out.append(" ");

  1302                     final int cc = readUByte(byteCodes, j);

  1303                     out.append(Integer.toString(cc));

  1304                 }

  1305             }

  1306             out.append("\n");

  1307         }

  1308         if (previousTrap != null) {

  1309             generateCatch(previousTrap);

  1310         }

  1311         out.append("  }\n");

  1312         out.append("};");

  1313     }

  1315     private int generateIf(byte[] byteCodes, int i,

  1316                            final Variable v2, final Variable v1,

  1317                            final String test) throws IOException {

  1318         int indx = i + readIntArg(byteCodes, i);

  1319         out.append("if (").append(v1)

  1320            .append(' ').append(test).append(' ')

  1321            .append(v2).append(") { gt = " + indx)

  1322            .append("; continue; }");

  1323         return i + 2;

  1324     }

  1326     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1327         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1328         final int indxLo = byteCodes[offsetInstruction + 2];

  1329         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1330     }

  1331     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1332         final int d = byteCodes[offsetInstruction + 0] << 24;

  1333         final int c = byteCodes[offsetInstruction + 1] << 16;

  1334         final int b = byteCodes[offsetInstruction + 2] << 8;

  1335         final int a = byteCodes[offsetInstruction + 3];

  1336         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1337     }

  1338     private int readUByte(byte[] byteCodes, int offsetInstruction) {

  1339         return byteCodes[offsetInstruction] & 0xff;

  1340     }

  1342     private int readUShort(byte[] byteCodes, int offsetInstruction) {

  1343         return ((byteCodes[offsetInstruction] & 0xff) << 8)

  1344                     | (byteCodes[offsetInstruction + 1] & 0xff);

  1345     }

  1347     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1348         int i = 0;

  1349         Boolean count = null;

  1350         boolean array = false;

  1351         sig.append("__");

  1352         int firstPos = sig.length();

  1353         while (i < descriptor.length()) {

  1354             char ch = descriptor.charAt(i++);

  1355             switch (ch) {

  1356                 case '(':

  1357                     count = true;

  1358                     continue;

  1359                 case ')':

  1360                     count = false;

  1361                     continue;

  1362                 case 'B':

  1363                 case 'C':

  1364                 case 'D':

  1365                 case 'F':

  1366                 case 'I':

  1367                 case 'J':

  1368                 case 'S':

  1369                 case 'Z':

  1370                     if (count) {

  1371                         if (array) {

  1372                             sig.append("_3");

  1373                         }

  1374                         sig.append(ch);

  1375                         if (ch == 'J' || ch == 'D') {

  1376                             cnt.append('1');

  1377                         } else {

  1378                             cnt.append('0');

  1379                         }

  1380                     } else {

  1381                         sig.insert(firstPos, ch);

  1382                         if (array) {

  1383                             returnType[0] = '[';

  1384                             sig.insert(firstPos, "_3");

  1385                         } else {

  1386                             returnType[0] = ch;

  1387                         }

  1388                     }

  1389                     array = false;

  1390                     continue;

  1391                 case 'V':

  1392                     assert !count;

  1393                     returnType[0] = 'V';

  1394                     sig.insert(firstPos, 'V');

  1395                     continue;

  1396                 case 'L':

  1397                     int next = descriptor.indexOf(';', i);

  1398                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1399                     if (count) {

  1400                         if (array) {

  1401                             sig.append("_3");

  1402                         }

  1403                         sig.append(realSig);

  1404                         cnt.append('0');

  1405                     } else {

  1406                         sig.insert(firstPos, realSig);

  1407                         if (array) {

  1408                             sig.insert(firstPos, "_3");

  1409                         }

  1410                         returnType[0] = 'L';

  1411                     }

  1412                     i = next + 1;

  1413                     array = false;

  1414                     continue;

  1415                 case '[':

  1416                     array = true;

  1417                     continue;

  1418                 default:

  1419                     throw new IllegalStateException("Invalid char: " + ch);

  1420             }

  1421         }

  1422     }

  1424     private static String mangleSig(String txt, int first, int last) {

  1425         StringBuilder sb = new StringBuilder();

  1426         for (int i = first; i < last; i++) {

  1427             final char ch = txt.charAt(i);

  1428             switch (ch) {

  1429                 case '/': sb.append('_'); break;

  1430                 case '_': sb.append("_1"); break;

  1431                 case ';': sb.append("_2"); break;

  1432                 case '[': sb.append("_3"); break;

  1433                 default: sb.append(ch); break;

  1434             }

  1435         }

  1436         return sb.toString();

  1437     }

  1439     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1440         StringBuilder name = new StringBuilder();

  1441         if ("<init>".equals(m.getName())) { // NOI18N

  1442             name.append("cons"); // NOI18N

  1443         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1444             name.append("class"); // NOI18N

  1445         } else {

  1446             name.append(m.getName());

  1447         }

  1449         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1450         return name.toString();

  1451     }

  1453     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1454         StringBuilder name = new StringBuilder();

  1455         String descr = mi[2];//mi.getDescriptor();

  1456         String nm= mi[1];

  1457         if ("<init>".equals(nm)) { // NOI18N

  1458             name.append("cons"); // NOI18N

  1459         } else {

  1460             name.append(nm);

  1461         }

  1462         countArgs(descr, returnType, name, cnt);

  1463         return name.toString();

  1464     }

  1466     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1467     throws IOException {

  1468         int methodIndex = readIntArg(byteCodes, i);

  1469         String[] mi = jc.getFieldInfoName(methodIndex);

  1470         char[] returnType = { 'V' };

  1471         StringBuilder cnt = new StringBuilder();

  1472         String mn = findMethodName(mi, cnt, returnType);

  1474         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1475         final Variable[] vars = new Variable[numArguments];

  1477         for (int j = numArguments - 1; j >= 0; --j) {

  1478             vars[j] = mapper.pop();

  1479         }

  1481         if (returnType[0] != 'V') {

  1482             out.append("var ")

  1483                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1484                .append(" = ");

  1485         }

  1487         final String in = mi[0];

  1488         out.append(accessClass(in.replace('/', '_')));

  1489         out.append("(false).");

  1490         if (mn.startsWith("cons_")) {

  1491             out.append("constructor.");

  1492         }

  1493         out.append(mn);

  1494         if (isStatic) {

  1495             out.append('(');

  1496         } else {

  1497             out.append(".call(");

  1498         }

  1499         if (numArguments > 0) {

  1500             out.append(vars[0]);

  1501             for (int j = 1; j < numArguments; ++j) {

  1502                 out.append(", ");

  1503                 out.append(vars[j]);

  1504             }

  1505         }

  1506         out.append(");");

  1507         i += 2;

  1508         addReference(in);

  1509         return i;

  1510     }

  1511     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1512     throws IOException {

  1513         int methodIndex = readIntArg(byteCodes, i);

  1514         String[] mi = jc.getFieldInfoName(methodIndex);

  1515         char[] returnType = { 'V' };

  1516         StringBuilder cnt = new StringBuilder();

  1517         String mn = findMethodName(mi, cnt, returnType);

  1519         final int numArguments = cnt.length() + 1;

  1520         final Variable[] vars = new Variable[numArguments];

  1522         for (int j = numArguments - 1; j >= 0; --j) {

  1523             vars[j] = mapper.pop();

  1524         }

  1526         if (returnType[0] != 'V') {

  1527             out.append("var ")

  1528                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1529                .append(" = ");

  1530         }

  1532         out.append(vars[0]).append('.');

  1533         out.append(mn);

  1534         out.append('(');

  1535         String sep = "";

  1536         for (int j = 1; j < numArguments; ++j) {

  1537             out.append(sep);

  1538             out.append(vars[j]);

  1539             sep = ", ";

  1540         }

  1541         out.append(");");

  1542         i += 2;

  1543         return i;

  1544     }

  1546     private void addReference(String cn) throws IOException {

  1547         if (requireReference(cn)) {

  1548             debug(" /* needs " + cn + " */");

  1549         }

  1550     }

  1552     private void outType(String d, StringBuilder out) {

  1553         int arr = 0;

  1554         while (d.charAt(0) == '[') {

  1555             out.append('A');

  1556             d = d.substring(1);

  1557         }

  1558         if (d.charAt(0) == 'L') {

  1559             assert d.charAt(d.length() - 1) == ';';

  1560             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1561         } else {

  1562             out.append(d);

  1563         }

  1564     }

  1566     private String encodeConstant(int entryIndex) throws IOException {

  1567         String[] classRef = { null };

  1568         String s = jc.stringValue(entryIndex, classRef);

  1569         if (classRef[0] != null) {

  1570             addReference(classRef[0]);

  1571             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1572         }

  1573         return s;

  1574     }

  1576     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1577         byte[] arr = m.findAnnotationData(true);

  1578         if (arr == null) {

  1579             return null;

  1580         }

  1581         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1582         class P extends AnnotationParser {

  1583             public P() {

  1584                 super(false);

  1585             }

  1587             int cnt;

  1588             String[] args = new String[30];

  1589             String body;

  1591             @Override

  1592             protected void visitAttr(String type, String attr, String at, String value) {

  1593                 if (type.equals(jvmType)) {

  1594                     if ("body".equals(attr)) {

  1595                         body = value;

  1596                     } else if ("args".equals(attr)) {

  1597                         args[cnt++] = value;

  1598                     } else {

  1599                         throw new IllegalArgumentException(attr);

  1600                     }

  1601                 }

  1602             }

  1603         }

  1604         P p = new P();

  1605         p.parse(arr, jc);

  1606         if (p.body == null) {

  1607             return null;

  1608         }

  1609         StringBuilder cnt = new StringBuilder();

  1610         final String mn = findMethodName(m, cnt);

  1611         out.append(prefix).append(mn);

  1612         out.append(" = function(");

  1613         String space = "";

  1614         int index = 0;

  1615         for (int i = 0; i < cnt.length(); i++) {

  1616             out.append(space);

  1617             space = outputArg(out, p.args, index);

  1618             index++;

  1619         }

  1620         out.append(") {").append("\n");

  1621         out.append(p.body);

  1622         out.append("\n}\n");

  1623         return mn;

  1624     }

  1625     private static String className(ClassData jc) {

  1626         //return jc.getName().getInternalName().replace('/', '_');

  1627         return jc.getClassName().replace('/', '_');

  1628     }

  1630     private static String[] findAnnotation(

  1631         byte[] arr, ClassData cd, final String className,

  1632         final String... attrNames

  1633     ) throws IOException {

  1634         if (arr == null) {

  1635             return null;

  1636         }

  1637         final String[] values = new String[attrNames.length];

  1638         final boolean[] found = { false };

  1639         final String jvmType = "L" + className.replace('.', '/') + ";";

  1640         AnnotationParser ap = new AnnotationParser(false) {

  1641             @Override

  1642             protected void visitAttr(String type, String attr, String at, String value) {

  1643                 if (type.equals(jvmType)) {

  1644                     found[0] = true;

  1645                     for (int i = 0; i < attrNames.length; i++) {

  1646                         if (attrNames[i].equals(attr)) {

  1647                             values[i] = value;

  1648                         }

  1649                     }

  1650                 }

  1651             }

  1653         };

  1654         ap.parse(arr, cd);

  1655         return found[0] ? values : null;

  1656     }

  1658     private CharSequence initField(FieldData v) {

  1659         final String is = v.getInternalSig();

  1660         if (is.length() == 1) {

  1661             switch (is.charAt(0)) {

  1662                 case 'S':

  1663                 case 'J':

  1664                 case 'B':

  1665                 case 'Z':

  1666                 case 'C':

  1667                 case 'I': return " = 0;";

  1668                 case 'F':

  1669                 case 'D': return " = 0.0;";

  1670                 default:

  1671                     throw new IllegalStateException(is);

  1672             }

  1673         }

  1674         return " = null;";

  1675     }

  1677     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1678         AnnotationParser ap = new AnnotationParser(true) {

  1679             int anno;

  1680             int cnt;

  1682             @Override

  1683             protected void visitAnnotationStart(String type) throws IOException {

  1684                 if (anno++ > 0) {

  1685                     out.append(",");

  1686                 }

  1687                 out.append('"').append(type).append("\" : {\n");

  1688                 cnt = 0;

  1689             }

  1691             @Override

  1692             protected void visitAnnotationEnd(String type) throws IOException {

  1693                 out.append("\n}\n");

  1694             }

  1696             @Override

  1697             protected void visitAttr(String type, String attr, String attrType, String value)

  1698             throws IOException {

  1699                 if (attr == null) {

  1700                     return;

  1701                 }

  1702                 if (cnt++ > 0) {

  1703                     out.append(",\n");

  1704                 }

  1705                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1706             }

  1707         };

  1708         ap.parse(data, cd);

  1709     }

  1711     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1712         final String name = args[indx];

  1713         if (name == null) {

  1714             return "";

  1715         }

  1716         if (name.contains(",")) {

  1717             throw new IOException("Wrong parameter with ',': " + name);

  1718         }

  1719         out.append(name);

  1720         return ",";

  1721     }

  1723     private static void emit(final Appendable out,

  1724                              final String format,

  1725                              final CharSequence... params) throws IOException {

  1726         final int length = format.length();

  1728         int processed = 0;

  1729         int paramOffset = format.indexOf('@');

  1730         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1731             final char paramChar = format.charAt(paramOffset + 1);

  1732             if ((paramChar >= '1') && (paramChar <= '9')) {

  1733                 final int paramIndex = paramChar - '0' - 1;

  1735                 out.append(format, processed, paramOffset);

  1736                 out.append(params[paramIndex]);

  1738                 ++paramOffset;

  1739                 processed = paramOffset + 1;

  1740             }

  1742             paramOffset = format.indexOf('@', paramOffset + 1);

  1743         }

  1745         out.append(format, processed, length);

  1746     }

  1748     private void generateCatch(TrapData[] traps) throws IOException {

  1749         out.append("} catch (e) {\n");

  1750         int finallyPC = -1;

  1751         for (TrapData e : traps) {

  1752             if (e == null) {

  1753                 break;

  1754             }

  1755             if (e.catch_cpx != 0) { //not finally

  1756                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1757                 addReference(classInternalName);

  1758                 if ("java/lang/Throwable".equals(classInternalName)) {

  1759                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1760                     out.append("  var stA0 = e;");

  1761                     out.append("} else {");

  1762                     out.append("  var stA0 = vm.java_lang_Throwable(true);");

  1763                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1764                     out.append("}");

  1765                     out.append("gt=" + e.handler_pc + "; continue;");

  1766                 } else {

  1767                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1768                     out.append("gt=" + e.handler_pc + "; var stA0 = e; continue;");

  1769                     out.append("}\n");

  1770                 }

  1771             } else {

  1772                 finallyPC = e.handler_pc;

  1773             }

  1774         }

  1775         if (finallyPC == -1) {

  1776             out.append("throw e;");

  1777         } else {

  1778             out.append("gt=" + finallyPC + "; var stA0 = e; continue;");

  1779         }

  1780         out.append("\n}");

  1781     }

  1782 }

author	Lubomir Nerad <lubomir.nerad@oracle.com>
	Fri, 25 Jan 2013 15:38:12 +0100
branch	registers
changeset 585	fe1a07c17681
parent 474	859cc3a0b8f0
child 587	a7a45e5e5e77
permissions	-rw-r--r--