hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@b0e82dcf51fb

     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         final int maxLocals = m.getMaxLocals();

   268         if (maxLocals > 0) {

   269             // TODO: generate only used local variables

   270             for (int j = 0; j <= VarType.LAST; ++j) {

   271                 out.append("\n  var ").append(Variable.getLocalVariable(j, 0));

   272                 for (int i = 1; i < maxLocals; ++i) {

   273                     out.append(", ");

   274                     out.append(Variable.getLocalVariable(j, i));

   275                 }

   276                 out.append(';');

   277             }

   278         }

   279         if (!m.isStatic()) {

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

   281         }

   283         // maxStack includes two stack positions for every pushed long / double

   284         // so this might generate more stack variables than we need

   285         final int maxStack = m.getMaxStack();

   286         if (maxStack > 0) {

   287             // TODO: generate only used stack variables

   288             for (int j = 0; j <= VarType.LAST; ++j) {

   289                 out.append("\n  var ").append(Variable.getStackVariable(j, 0));

   290                 for (int i = 1; i < maxStack; ++i) {

   291                     out.append(", ");

   292                     out.append(Variable.getStackVariable(j, i));

   293                 }

   294                 out.append(';');

   295             }

   296         }

   298         int lastStackFrame = -1;

   299         TrapData[] previousTrap = null;

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

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

   303             int prev = i;

   304             stackMapIterator.advanceTo(i);

   305             boolean changeInCatch = trap.advanceTo(i);

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

   307                 if (previousTrap != null) {

   308                     generateCatch(previousTrap);

   309                     previousTrap = null;

   310                 }

   311             }

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

   313                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   317                 changeInCatch = true;

   318             } else {

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

   320             }

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

   322                 out.append("try {");

   323                 previousTrap = trap.current();

   324             }

   325             final int c = readByte(byteCodes, i);

   326             switch (c) {

   327                 case opc_aload_0:

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

   329                     break;

   330                 case opc_iload_0:

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

   332                     break;

   333                 case opc_lload_0:

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

   335                     break;

   336                 case opc_fload_0:

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

   338                     break;

   339                 case opc_dload_0:

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

   341                     break;

   342                 case opc_aload_1:

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

   344                     break;

   345                 case opc_iload_1:

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

   347                     break;

   348                 case opc_lload_1:

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

   350                     break;

   351                 case opc_fload_1:

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

   353                     break;

   354                 case opc_dload_1:

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

   356                     break;

   357                 case opc_aload_2:

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

   359                     break;

   360                 case opc_iload_2:

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

   362                     break;

   363                 case opc_lload_2:

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

   365                     break;

   366                 case opc_fload_2:

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

   368                     break;

   369                 case opc_dload_2:

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

   371                     break;

   372                 case opc_aload_3:

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

   374                     break;

   375                 case opc_iload_3:

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

   377                     break;

   378                 case opc_lload_3:

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

   380                     break;

   381                 case opc_fload_3:

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

   383                     break;

   384                 case opc_dload_3:

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

   386                     break;

   387                 case opc_iload: {

   388                     final int indx = readByte(byteCodes, ++i);

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

   390                     break;

   391                 }

   392                 case opc_lload: {

   393                     final int indx = readByte(byteCodes, ++i);

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

   395                     break;

   396                 }

   397                 case opc_fload: {

   398                     final int indx = readByte(byteCodes, ++i);

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

   400                     break;

   401                 }

   402                 case opc_dload: {

   403                     final int indx = readByte(byteCodes, ++i);

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

   405                     break;

   406                 }

   407                 case opc_aload: {

   408                     final int indx = readByte(byteCodes, ++i);

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

   410                     break;

   411                 }

   412                 case opc_istore: {

   413                     final int indx = readByte(byteCodes, ++i);

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

   415                     break;

   416                 }

   417                 case opc_lstore: {

   418                     final int indx = readByte(byteCodes, ++i);

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

   420                     break;

   421                 }

   422                 case opc_fstore: {

   423                     final int indx = readByte(byteCodes, ++i);

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

   425                     break;

   426                 }

   427                 case opc_dstore: {

   428                     final int indx = readByte(byteCodes, ++i);

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

   430                     break;

   431                 }

   432                 case opc_astore: {

   433                     final int indx = readByte(byteCodes, ++i);

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

   435                     break;

   436                 }

   437                 case opc_astore_0:

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

   439                     break;

   440                 case opc_istore_0:

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

   442                     break;

   443                 case opc_lstore_0:

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

   445                     break;

   446                 case opc_fstore_0:

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

   448                     break;

   449                 case opc_dstore_0:

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

   451                     break;

   452                 case opc_astore_1:

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

   454                     break;

   455                 case opc_istore_1:

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

   457                     break;

   458                 case opc_lstore_1:

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

   460                     break;

   461                 case opc_fstore_1:

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

   463                     break;

   464                 case opc_dstore_1:

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

   466                     break;

   467                 case opc_astore_2:

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

   469                     break;

   470                 case opc_istore_2:

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

   472                     break;

   473                 case opc_lstore_2:

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

   475                     break;

   476                 case opc_fstore_2:

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

   478                     break;

   479                 case opc_dstore_2:

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

   481                     break;

   482                 case opc_astore_3:

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

   484                     break;

   485                 case opc_istore_3:

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

   487                     break;

   488                 case opc_lstore_3:

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

   490                     break;

   491                 case opc_fstore_3:

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

   493                     break;

   494                 case opc_dstore_3:

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

   496                     break;

   497                 case opc_iadd:

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

   499                     break;

   500                 case opc_ladd:

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

   502                     break;

   503                 case opc_fadd:

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

   505                     break;

   506                 case opc_dadd:

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

   508                     break;

   509                 case opc_isub:

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

   511                     break;

   512                 case opc_lsub:

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

   514                     break;

   515                 case opc_fsub:

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

   517                     break;

   518                 case opc_dsub:

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

   520                     break;

   521                 case opc_imul:

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

   523                     break;

   524                 case opc_lmul:

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

   526                     break;

   527                 case opc_fmul:

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

   529                     break;

   530                 case opc_dmul:

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

   532                     break;

   533                 case opc_idiv:

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

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

   536                     break;

   537                 case opc_ldiv:

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

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

   540                     break;

   541                 case opc_fdiv:

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

   543                     break;

   544                 case opc_ddiv:

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

   546                     break;

   547                 case opc_irem:

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

   549                     break;

   550                 case opc_lrem:

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

   552                     break;

   553                 case opc_frem:

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

   555                     break;

   556                 case opc_drem:

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

   558                     break;

   559                 case opc_iand:

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

   561                     break;

   562                 case opc_land:

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

   564                     break;

   565                 case opc_ior:

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

   567                     break;

   568                 case opc_lor:

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

   570                     break;

   571                 case opc_ixor:

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

   573                     break;

   574                 case opc_lxor:

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

   576                     break;

   577                 case opc_ineg:

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

   579                     break;

   580                 case opc_lneg:

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

   582                     break;

   583                 case opc_fneg:

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

   585                     break;

   586                 case opc_dneg:

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

   588                     break;

   589                 case opc_ishl:

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

   591                     break;

   592                 case opc_lshl:

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

   594                     break;

   595                 case opc_ishr:

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

   597                     break;

   598                 case opc_lshr:

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

   600                     break;

   601                 case opc_iushr:

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

   603                     break;

   604                 case opc_lushr:

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

   606                     break;

   607                 case opc_iinc: {

   608                     final int varIndx = readByte(byteCodes, ++i);

   609                     final int incrBy = byteCodes[++i];

   610                     if (incrBy == 1) {

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

   612                     } else {

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

   614                              lmapper.getI(varIndx),

   615                              Integer.toString(incrBy));

   616                     }

   617                     break;

   618                 }

   619                 case opc_return:

   620                     emit(out, "return;");

   621                     break;

   622                 case opc_ireturn:

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

   624                     break;

   625                 case opc_lreturn:

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

   627                     break;

   628                 case opc_freturn:

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

   630                     break;

   631                 case opc_dreturn:

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

   633                     break;

   634                 case opc_areturn:

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

   636                     break;

   637                 case opc_i2l:

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

   639                     break;

   640                 case opc_i2f:

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

   642                     break;

   643                 case opc_i2d:

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

   645                     break;

   646                 case opc_l2i:

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

   648                     break;

   649                     // max int check?

   650                 case opc_l2f:

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

   652                     break;

   653                 case opc_l2d:

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

   655                     break;

   656                 case opc_f2d:

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

   658                     break;

   659                 case opc_d2f:

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

   661                     break;

   662                 case opc_f2i:

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

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

   665                     break;

   666                 case opc_f2l:

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

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

   669                     break;

   670                 case opc_d2i:

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

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

   673                     break;

   674                 case opc_d2l:

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

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

   677                     break;

   678                 case opc_i2b:

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

   680                     break;

   681                 case opc_i2c:

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

   683                     break;

   684                 case opc_i2s:

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

   686                     break;

   687                 case opc_aconst_null:

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

   689                     break;

   690                 case opc_iconst_m1:

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

   692                     break;

   693                 case opc_iconst_0:

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

   695                     break;

   696                 case opc_dconst_0:

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

   698                     break;

   699                 case opc_lconst_0:

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

   701                     break;

   702                 case opc_fconst_0:

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

   704                     break;

   705                 case opc_iconst_1:

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

   707                     break;

   708                 case opc_lconst_1:

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

   710                     break;

   711                 case opc_fconst_1:

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

   713                     break;

   714                 case opc_dconst_1:

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

   716                     break;

   717                 case opc_iconst_2:

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

   719                     break;

   720                 case opc_fconst_2:

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

   722                     break;

   723                 case opc_iconst_3:

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

   725                     break;

   726                 case opc_iconst_4:

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

   728                     break;

   729                 case opc_iconst_5:

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

   731                     break;

   732                 case opc_ldc: {

   733                     int indx = readByte(byteCodes, ++i);

   734                     String v = encodeConstant(indx);

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

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

   737                     break;

   738                 }

   739                 case opc_ldc_w:

   740                 case opc_ldc2_w: {

   741                     int indx = readIntArg(byteCodes, i);

   742                     i += 2;

   743                     String v = encodeConstant(indx);

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

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

   746                     break;

   747                 }

   748                 case opc_lcmp:

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

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

   751                     break;

   752                 case opc_fcmpl:

   753                 case opc_fcmpg:

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

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

   756                     break;

   757                 case opc_dcmpl:

   758                 case opc_dcmpg:

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

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

   761                     break;

   762                 case opc_if_acmpeq:

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

   764                                    "===");

   765                     break;

   766                 case opc_if_acmpne:

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

   768                                    "!=");

   769                     break;

   770                 case opc_if_icmpeq:

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

   772                                    "==");

   773                     break;

   774                 case opc_ifeq: {

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

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

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

   778                     i += 2;

   779                     break;

   780                 }

   781                 case opc_ifne: {

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

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

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

   785                     i += 2;

   786                     break;

   787                 }

   788                 case opc_iflt: {

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

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

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

   792                     i += 2;

   793                     break;

   794                 }

   795                 case opc_ifle: {

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

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

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

   799                     i += 2;

   800                     break;

   801                 }

   802                 case opc_ifgt: {

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

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

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

   806                     i += 2;

   807                     break;

   808                 }

   809                 case opc_ifge: {

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

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

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

   813                     i += 2;

   814                     break;

   815                 }

   816                 case opc_ifnonnull: {

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

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

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

   820                     i += 2;

   821                     break;

   822                 }

   823                 case opc_ifnull: {

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

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

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

   827                     i += 2;

   828                     break;

   829                 }

   830                 case opc_if_icmpne:

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

   832                                    "!=");

   833                     break;

   834                 case opc_if_icmplt:

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

   836                                    "<");

   837                     break;

   838                 case opc_if_icmple:

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

   840                                    "<=");

   841                     break;

   842                 case opc_if_icmpgt:

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

   844                                    ">");

   845                     break;

   846                 case opc_if_icmpge:

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

   848                                    ">=");

   849                     break;

   850                 case opc_goto: {

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

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

   853                     i += 2;

   854                     break;

   855                 }

   856                 case opc_lookupswitch: {

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

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

   859                     table += 4;

   860                     int n = readInt4(byteCodes, table);

   861                     table += 4;

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

   863                     while (n-- > 0) {

   864                         int cnstnt = readInt4(byteCodes, table);

   865                         table += 4;

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

   867                         table += 4;

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

   869                     }

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

   871                     i = table - 1;

   872                     break;

   873                 }

   874                 case opc_tableswitch: {

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

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

   877                     table += 4;

   878                     int low = readInt4(byteCodes, table);

   879                     table += 4;

   880                     int high = readInt4(byteCodes, table);

   881                     table += 4;

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

   883                     while (low <= high) {

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

   885                         table += 4;

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

   887                         low++;

   888                     }

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

   890                     i = table - 1;

   891                     break;

   892                 }

   893                 case opc_invokeinterface: {

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

   895                     break;

   896                 }

   897                 case opc_invokevirtual:

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

   899                     break;

   900                 case opc_invokespecial:

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

   902                     break;

   903                 case opc_invokestatic:

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

   905                     break;

   906                 case opc_new: {

   907                     int indx = readIntArg(byteCodes, i);

   908                     String ci = jc.getClassName(indx);

   909                     emit(out, "@1 = new @2;",

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

   911                     addReference(ci);

   912                     i += 2;

   913                     break;

   914                 }

   915                 case opc_newarray:

   916                     int atype = readByte(byteCodes, ++i);

   917                     String jvmType;

   918                     switch (atype) {

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

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

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

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

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

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

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

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

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

   928                     }

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

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

   931                     break;

   932                 case opc_anewarray: {

   933                     int type = readIntArg(byteCodes, i);

   934                     i += 2;

   935                     String typeName = jc.getClassName(type);

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

   937                         typeName = "[" + typeName;

   938                     } else {

   939                         typeName = "[L" + typeName + ";";

   940                     }

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

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

   943                     break;

   944                 }

   945                 case opc_multianewarray: {

   946                     int type = readIntArg(byteCodes, i);

   947                     i += 2;

   948                     String typeName = jc.getClassName(type);

   949                     int dim = readByte(byteCodes, ++i);

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

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

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

   953                         typeName = typeName.substring(1);

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

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

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

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

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

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

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

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

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

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

   964                             append(";");

   965                     }

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

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

   968                     }

   969                     out.append("\n").append(smapper.pushA()).append(" = a0; }");

   970                     break;

   971                 }

   972                 case opc_arraylength:

   973                     emit(out, "@2 = @1.length;", smapper.popA(), smapper.pushI());

   974                     break;

   975                 case opc_lastore:

   976                     emit(out, "@3[@2] = @1;",

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

   978                     break;

   979                 case opc_fastore:

   980                     emit(out, "@3[@2] = @1;",

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

   982                     break;

   983                 case opc_dastore:

   984                     emit(out, "@3[@2] = @1;",

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

   986                     break;

   987                 case opc_aastore:

   988                     emit(out, "@3[@2] = @1;",

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

   990                     break;

   991                 case opc_iastore:

   992                 case opc_bastore:

   993                 case opc_castore:

   994                 case opc_sastore:

   995                     emit(out, "@3[@2] = @1;",

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

   997                     break;

   998                 case opc_laload:

   999                     emit(out, "@3 = @2[@1];",

  1000                          smapper.popI(), smapper.popA(), smapper.pushL());

  1001                     break;

  1002                 case opc_faload:

  1003                     emit(out, "@3 = @2[@1];",

  1004                          smapper.popI(), smapper.popA(), smapper.pushF());

  1005                     break;

  1006                 case opc_daload:

  1007                     emit(out, "@3 = @2[@1];",

  1008                          smapper.popI(), smapper.popA(), smapper.pushD());

  1009                     break;

  1010                 case opc_aaload:

  1011                     emit(out, "@3 = @2[@1];",

  1012                          smapper.popI(), smapper.popA(), smapper.pushA());

  1013                     break;

  1014                 case opc_iaload:

  1015                 case opc_baload:

  1016                 case opc_caload:

  1017                 case opc_saload:

  1018                     emit(out, "@3 = @2[@1];",

  1019                          smapper.popI(), smapper.popA(), smapper.pushI());

  1020                     break;

  1021                 case opc_pop:

  1022                 case opc_pop2:

  1023                     smapper.pop(1);

  1024                     debug("/* pop */");

  1025                     break;

  1026                 case opc_dup: {

  1027                     final Variable v = smapper.get(0);

  1028                     emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);

  1029                     break;

  1030                 }

  1031                 case opc_dup2: {

  1032                     if (smapper.get(0).isCategory2()) {

  1033                         final Variable v = smapper.get(0);

  1034                         emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);

  1035                     } else {

  1036                         final Variable v1 = smapper.get(0);

  1037                         final Variable v2 = smapper.get(1);

  1038                         emit(out, "{ @1 = @2; @3 = @4; }",

  1039                              smapper.pushT(v2.getType()), v2,

  1040                              smapper.pushT(v1.getType()), v1);

  1041                     }

  1042                     break;

  1043                 }

  1044                 case opc_dup_x1: {

  1045                     final Variable vi1 = smapper.pop();

  1046                     final Variable vi2 = smapper.pop();

  1047                     final Variable vo3 = smapper.pushT(vi1.getType());

  1048                     final Variable vo2 = smapper.pushT(vi2.getType());

  1049                     final Variable vo1 = smapper.pushT(vi1.getType());

  1051                     emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1052                          vo1, vi1, vo2, vi2, vo3, vo1);

  1053                     break;

  1054                 }

  1055                 case opc_dup_x2: {

  1056                     if (smapper.get(1).isCategory2()) {

  1057                         final Variable vi1 = smapper.pop();

  1058                         final Variable vi2 = smapper.pop();

  1059                         final Variable vo3 = smapper.pushT(vi1.getType());

  1060                         final Variable vo2 = smapper.pushT(vi2.getType());

  1061                         final Variable vo1 = smapper.pushT(vi1.getType());

  1063                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1064                              vo1, vi1, vo2, vi2, vo3, vo1);

  1065                     } else {

  1066                         final Variable vi1 = smapper.pop();

  1067                         final Variable vi2 = smapper.pop();

  1068                         final Variable vi3 = smapper.pop();

  1069                         final Variable vo4 = smapper.pushT(vi1.getType());

  1070                         final Variable vo3 = smapper.pushT(vi3.getType());

  1071                         final Variable vo2 = smapper.pushT(vi2.getType());

  1072                         final Variable vo1 = smapper.pushT(vi1.getType());

  1074                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; @7 = @8; }",

  1075                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1076                     }

  1077                     break;

  1078                 }

  1079                 case opc_bipush:

  1080                     emit(out, "@1 = @2;",

  1081                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1082                     break;

  1083                 case opc_sipush:

  1084                     emit(out, "@1 = @2;",

  1085                          smapper.pushI(),

  1086                          Integer.toString(readIntArg(byteCodes, i)));

  1087                     i += 2;

  1088                     break;

  1089                 case opc_getfield: {

  1090                     int indx = readIntArg(byteCodes, i);

  1091                     String[] fi = jc.getFieldInfoName(indx);

  1092                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1093                     emit(out, "@2 = @1.fld_@3;",

  1094                          smapper.popA(), smapper.pushT(type), fi[1]);

  1095                     i += 2;

  1096                     break;

  1097                 }

  1098                 case opc_getstatic: {

  1099                     int indx = readIntArg(byteCodes, i);

  1100                     String[] fi = jc.getFieldInfoName(indx);

  1101                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1102                     emit(out, "@1 = @2(false).constructor.@3;",

  1103                          smapper.pushT(type),

  1104                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1105                     i += 2;

  1106                     addReference(fi[0]);

  1107                     break;

  1108                 }

  1109                 case opc_putfield: {

  1110                     int indx = readIntArg(byteCodes, i);

  1111                     String[] fi = jc.getFieldInfoName(indx);

  1112                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1113                     emit(out, "@2.fld_@3 = @1;",

  1114                          smapper.popT(type), smapper.popA(), fi[1]);

  1115                     i += 2;

  1116                     break;

  1117                 }

  1118                 case opc_putstatic: {

  1119                     int indx = readIntArg(byteCodes, i);

  1120                     String[] fi = jc.getFieldInfoName(indx);

  1121                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1122                     emit(out, "@1(false).constructor.@2 = @3;",

  1123                          accessClass(fi[0].replace('/', '_')), fi[1],

  1124                          smapper.popT(type));

  1125                     i += 2;

  1126                     addReference(fi[0]);

  1127                     break;

  1128                 }

  1129                 case opc_checkcast: {

  1130                     int indx = readIntArg(byteCodes, i);

  1131                     final String type = jc.getClassName(indx);

  1132                     if (!type.startsWith("[")) {

  1133                         // no way to check arrays right now

  1134                         // XXX proper exception

  1135                         emit(out,

  1136                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1137                              smapper.getA(0), type.replace('/', '_'));

  1138                     }

  1139                     i += 2;

  1140                     break;

  1141                 }

  1142                 case opc_instanceof: {

  1143                     int indx = readIntArg(byteCodes, i);

  1144                     final String type = jc.getClassName(indx);

  1145                     emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",

  1146                          smapper.popA(), smapper.pushI(),

  1147                          type.replace('/', '_'));

  1148                     i += 2;

  1149                     break;

  1150                 }

  1151                 case opc_athrow: {

  1152                     final Variable v = smapper.popA();

  1153                     smapper.clear();

  1155                     emit(out, "{ @1 = @2; throw @2; }",

  1156                          smapper.pushA(), v);

  1157                     break;

  1158                 }

  1160                 case opc_monitorenter: {

  1161                     out.append("/* monitor enter */");

  1162                     smapper.popA();

  1163                     break;

  1164                 }

  1166                 case opc_monitorexit: {

  1167                     out.append("/* monitor exit */");

  1168                     smapper.popA();

  1169                     break;

  1170                 }

  1172                 default: {

  1173                     emit(out, "throw 'unknown bytecode @1';",

  1174                          Integer.toString(c));

  1175                 }

  1176             }

  1177             if (debug(" //")) {

  1178                 for (int j = prev; j <= i; j++) {

  1179                     out.append(" ");

  1180                     final int cc = readByte(byteCodes, j);

  1181                     out.append(Integer.toString(cc));

  1182                 }

  1183             }

  1184             out.append("\n");

  1185         }

  1186         if (previousTrap != null) {

  1187             generateCatch(previousTrap);

  1188         }

  1189         out.append("  }\n");

  1190         out.append("};");

  1191     }

  1193     private int generateIf(byte[] byteCodes, int i,

  1194                            final Variable v2, final Variable v1,

  1195                            final String test) throws IOException {

  1196         int indx = i + readIntArg(byteCodes, i);

  1197         out.append("if (").append(v1)

  1198            .append(' ').append(test).append(' ')

  1199            .append(v2).append(") { gt = " + indx)

  1200            .append("; continue; }");

  1201         return i + 2;

  1202     }

  1204     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1205         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1206         final int indxLo = byteCodes[offsetInstruction + 2];

  1207         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1208     }

  1209     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1210         final int d = byteCodes[offsetInstruction + 0] << 24;

  1211         final int c = byteCodes[offsetInstruction + 1] << 16;

  1212         final int b = byteCodes[offsetInstruction + 2] << 8;

  1213         final int a = byteCodes[offsetInstruction + 3];

  1214         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1215     }

  1216     private int readByte(byte[] byteCodes, int offsetInstruction) {

  1217         return byteCodes[offsetInstruction] & 0xff;

  1218     }

  1220     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1221         int i = 0;

  1222         Boolean count = null;

  1223         boolean array = false;

  1224         sig.append("__");

  1225         int firstPos = sig.length();

  1226         while (i < descriptor.length()) {

  1227             char ch = descriptor.charAt(i++);

  1228             switch (ch) {

  1229                 case '(':

  1230                     count = true;

  1231                     continue;

  1232                 case ')':

  1233                     count = false;

  1234                     continue;

  1235                 case 'B':

  1236                 case 'C':

  1237                 case 'D':

  1238                 case 'F':

  1239                 case 'I':

  1240                 case 'J':

  1241                 case 'S':

  1242                 case 'Z':

  1243                     if (count) {

  1244                         if (array) {

  1245                             sig.append("_3");

  1246                         }

  1247                         sig.append(ch);

  1248                         if (ch == 'J' || ch == 'D') {

  1249                             cnt.append('1');

  1250                         } else {

  1251                             cnt.append('0');

  1252                         }

  1253                     } else {

  1254                         sig.insert(firstPos, ch);

  1255                         if (array) {

  1256                             returnType[0] = '[';

  1257                             sig.insert(firstPos, "_3");

  1258                         } else {

  1259                             returnType[0] = ch;

  1260                         }

  1261                     }

  1262                     array = false;

  1263                     continue;

  1264                 case 'V':

  1265                     assert !count;

  1266                     returnType[0] = 'V';

  1267                     sig.insert(firstPos, 'V');

  1268                     continue;

  1269                 case 'L':

  1270                     int next = descriptor.indexOf(';', i);

  1271                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1272                     if (count) {

  1273                         if (array) {

  1274                             sig.append("_3");

  1275                         }

  1276                         sig.append(realSig);

  1277                         cnt.append('0');

  1278                     } else {

  1279                         sig.insert(firstPos, realSig);

  1280                         if (array) {

  1281                             sig.insert(firstPos, "_3");

  1282                         }

  1283                         returnType[0] = 'L';

  1284                     }

  1285                     i = next + 1;

  1286                     array = false;

  1287                     continue;

  1288                 case '[':

  1289                     array = true;

  1290                     continue;

  1291                 default:

  1292                     throw new IllegalStateException("Invalid char: " + ch);

  1293             }

  1294         }

  1295     }

  1297     private static String mangleSig(String txt, int first, int last) {

  1298         StringBuilder sb = new StringBuilder();

  1299         for (int i = first; i < last; i++) {

  1300             final char ch = txt.charAt(i);

  1301             switch (ch) {

  1302                 case '/': sb.append('_'); break;

  1303                 case '_': sb.append("_1"); break;

  1304                 case ';': sb.append("_2"); break;

  1305                 case '[': sb.append("_3"); break;

  1306                 default: sb.append(ch); break;

  1307             }

  1308         }

  1309         return sb.toString();

  1310     }

  1312     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1313         StringBuilder name = new StringBuilder();

  1314         if ("<init>".equals(m.getName())) { // NOI18N

  1315             name.append("cons"); // NOI18N

  1316         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1317             name.append("class"); // NOI18N

  1318         } else {

  1319             name.append(m.getName());

  1320         }

  1322         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1323         return name.toString();

  1324     }

  1326     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1327         StringBuilder name = new StringBuilder();

  1328         String descr = mi[2];//mi.getDescriptor();

  1329         String nm= mi[1];

  1330         if ("<init>".equals(nm)) { // NOI18N

  1331             name.append("cons"); // NOI18N

  1332         } else {

  1333             name.append(nm);

  1334         }

  1335         countArgs(descr, returnType, name, cnt);

  1336         return name.toString();

  1337     }

  1339     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1340     throws IOException {

  1341         int methodIndex = readIntArg(byteCodes, i);

  1342         String[] mi = jc.getFieldInfoName(methodIndex);

  1343         char[] returnType = { 'V' };

  1344         StringBuilder cnt = new StringBuilder();

  1345         String mn = findMethodName(mi, cnt, returnType);

  1347         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1348         final Variable[] vars = new Variable[numArguments];

  1350         for (int j = numArguments - 1; j >= 0; --j) {

  1351             vars[j] = mapper.pop();

  1352         }

  1354         if (returnType[0] != 'V') {

  1355             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1356                .append(" = ");

  1357         }

  1359         final String in = mi[0];

  1360         out.append(accessClass(in.replace('/', '_')));

  1361         out.append("(false).");

  1362         if (mn.startsWith("cons_")) {

  1363             out.append("constructor.");

  1364         }

  1365         out.append(mn);

  1366         if (isStatic) {

  1367             out.append('(');

  1368         } else {

  1369             out.append(".call(");

  1370         }

  1371         if (numArguments > 0) {

  1372             out.append(vars[0]);

  1373             for (int j = 1; j < numArguments; ++j) {

  1374                 out.append(", ");

  1375                 out.append(vars[j]);

  1376             }

  1377         }

  1378         out.append(");");

  1379         i += 2;

  1380         addReference(in);

  1381         return i;

  1382     }

  1383     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1384     throws IOException {

  1385         int methodIndex = readIntArg(byteCodes, i);

  1386         String[] mi = jc.getFieldInfoName(methodIndex);

  1387         char[] returnType = { 'V' };

  1388         StringBuilder cnt = new StringBuilder();

  1389         String mn = findMethodName(mi, cnt, returnType);

  1391         final int numArguments = cnt.length() + 1;

  1392         final Variable[] vars = new Variable[numArguments];

  1394         for (int j = numArguments - 1; j >= 0; --j) {

  1395             vars[j] = mapper.pop();

  1396         }

  1398         if (returnType[0] != 'V') {

  1399             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1400                .append(" = ");

  1401         }

  1403         out.append(vars[0]).append('.');

  1404         out.append(mn);

  1405         out.append('(');

  1406         String sep = "";

  1407         for (int j = 1; j < numArguments; ++j) {

  1408             out.append(sep);

  1409             out.append(vars[j]);

  1410             sep = ", ";

  1411         }

  1412         out.append(");");

  1413         i += 2;

  1414         return i;

  1415     }

  1417     private void addReference(String cn) throws IOException {

  1418         if (requireReference(cn)) {

  1419             debug(" /* needs " + cn + " */");

  1420         }

  1421     }

  1423     private void outType(String d, StringBuilder out) {

  1424         int arr = 0;

  1425         while (d.charAt(0) == '[') {

  1426             out.append('A');

  1427             d = d.substring(1);

  1428         }

  1429         if (d.charAt(0) == 'L') {

  1430             assert d.charAt(d.length() - 1) == ';';

  1431             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1432         } else {

  1433             out.append(d);

  1434         }

  1435     }

  1437     private String encodeConstant(int entryIndex) throws IOException {

  1438         String[] classRef = { null };

  1439         String s = jc.stringValue(entryIndex, classRef);

  1440         if (classRef[0] != null) {

  1441             addReference(classRef[0]);

  1442             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1443         }

  1444         return s;

  1445     }

  1447     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1448         byte[] arr = m.findAnnotationData(true);

  1449         if (arr == null) {

  1450             return null;

  1451         }

  1452         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1453         class P extends AnnotationParser {

  1454             public P() {

  1455                 super(false);

  1456             }

  1458             int cnt;

  1459             String[] args = new String[30];

  1460             String body;

  1462             @Override

  1463             protected void visitAttr(String type, String attr, String at, String value) {

  1464                 if (type.equals(jvmType)) {

  1465                     if ("body".equals(attr)) {

  1466                         body = value;

  1467                     } else if ("args".equals(attr)) {

  1468                         args[cnt++] = value;

  1469                     } else {

  1470                         throw new IllegalArgumentException(attr);

  1471                     }

  1472                 }

  1473             }

  1474         }

  1475         P p = new P();

  1476         p.parse(arr, jc);

  1477         if (p.body == null) {

  1478             return null;

  1479         }

  1480         StringBuilder cnt = new StringBuilder();

  1481         final String mn = findMethodName(m, cnt);

  1482         out.append(prefix).append(mn);

  1483         out.append(" = function(");

  1484         String space = "";

  1485         int index = 0;

  1486         for (int i = 0; i < cnt.length(); i++) {

  1487             out.append(space);

  1488             space = outputArg(out, p.args, index);

  1489             index++;

  1490         }

  1491         out.append(") {").append("\n");

  1492         out.append(p.body);

  1493         out.append("\n}\n");

  1494         return mn;

  1495     }

  1496     private static String className(ClassData jc) {

  1497         //return jc.getName().getInternalName().replace('/', '_');

  1498         return jc.getClassName().replace('/', '_');

  1499     }

  1501     private static String[] findAnnotation(

  1502         byte[] arr, ClassData cd, final String className,

  1503         final String... attrNames

  1504     ) throws IOException {

  1505         if (arr == null) {

  1506             return null;

  1507         }

  1508         final String[] values = new String[attrNames.length];

  1509         final boolean[] found = { false };

  1510         final String jvmType = "L" + className.replace('.', '/') + ";";

  1511         AnnotationParser ap = new AnnotationParser(false) {

  1512             @Override

  1513             protected void visitAttr(String type, String attr, String at, String value) {

  1514                 if (type.equals(jvmType)) {

  1515                     found[0] = true;

  1516                     for (int i = 0; i < attrNames.length; i++) {

  1517                         if (attrNames[i].equals(attr)) {

  1518                             values[i] = value;

  1519                         }

  1520                     }

  1521                 }

  1522             }

  1524         };

  1525         ap.parse(arr, cd);

  1526         return found[0] ? values : null;

  1527     }

  1529     private CharSequence initField(FieldData v) {

  1530         final String is = v.getInternalSig();

  1531         if (is.length() == 1) {

  1532             switch (is.charAt(0)) {

  1533                 case 'S':

  1534                 case 'J':

  1535                 case 'B':

  1536                 case 'Z':

  1537                 case 'C':

  1538                 case 'I': return " = 0;";

  1539                 case 'F':

  1540                 case 'D': return " = 0.0;";

  1541                 default:

  1542                     throw new IllegalStateException(is);

  1543             }

  1544         }

  1545         return " = null;";

  1546     }

  1548     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1549         AnnotationParser ap = new AnnotationParser(true) {

  1550             int anno;

  1551             int cnt;

  1553             @Override

  1554             protected void visitAnnotationStart(String type) throws IOException {

  1555                 if (anno++ > 0) {

  1556                     out.append(",");

  1557                 }

  1558                 out.append('"').append(type).append("\" : {\n");

  1559                 cnt = 0;

  1560             }

  1562             @Override

  1563             protected void visitAnnotationEnd(String type) throws IOException {

  1564                 out.append("\n}\n");

  1565             }

  1567             @Override

  1568             protected void visitAttr(String type, String attr, String attrType, String value)

  1569             throws IOException {

  1570                 if (attr == null) {

  1571                     return;

  1572                 }

  1573                 if (cnt++ > 0) {

  1574                     out.append(",\n");

  1575                 }

  1576                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1577             }

  1578         };

  1579         ap.parse(data, cd);

  1580     }

  1582     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1583         final String name = args[indx];

  1584         if (name == null) {

  1585             return "";

  1586         }

  1587         if (name.contains(",")) {

  1588             throw new IOException("Wrong parameter with ',': " + name);

  1589         }

  1590         out.append(name);

  1591         return ",";

  1592     }

  1594     private static void emit(final Appendable out,

  1595                              final String format,

  1596                              final CharSequence... params) throws IOException {

  1597         final int length = format.length();

  1599         int processed = 0;

  1600         int paramOffset = format.indexOf('@');

  1601         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1602             final char paramChar = format.charAt(paramOffset + 1);

  1603             if ((paramChar >= '1') && (paramChar <= '9')) {

  1604                 final int paramIndex = paramChar - '0' - 1;

  1606                 out.append(format, processed, paramOffset);

  1607                 out.append(params[paramIndex]);

  1609                 ++paramOffset;

  1610                 processed = paramOffset + 1;

  1611             }

  1613             paramOffset = format.indexOf('@', paramOffset + 1);

  1614         }

  1616         out.append(format, processed, length);

  1617     }

  1619     private void generateCatch(TrapData[] traps) throws IOException {

  1620         out.append("} catch (e) {\n");

  1621         int finallyPC = -1;

  1622         for (TrapData e : traps) {

  1623             if (e == null) {

  1624                 break;

  1625             }

  1626             if (e.catch_cpx != 0) { //not finally

  1627                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1628                 addReference(classInternalName);

  1629                 if ("java/lang/Throwable".equals(classInternalName)) {

  1630                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1631                     out.append("  stA0 = e;");

  1632                     out.append("} else {");

  1633                     out.append("  stA0 = vm.java_lang_Throwable(true);");

  1634                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1635                     out.append("}");

  1636                     out.append("gt=" + e.handler_pc + "; continue;");

  1637                 } else {

  1638                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1639                     out.append("gt=" + e.handler_pc + "; stA0 = e; continue;");

  1640                     out.append("}\n");

  1641                 }

  1642             } else {

  1643                 finallyPC = e.handler_pc;

  1644             }

  1645         }

  1646         if (finallyPC == -1) {

  1647             out.append("throw e;");

  1648         } else {

  1649             out.append("gt=" + finallyPC + "; stA0 = e; continue;");

  1650         }

  1651         out.append("\n}");

  1652     }

  1653 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Tue, 15 Jan 2013 12:26:19 +0100
changeset 457	b0e82dcf51fb
parent 456	f2f769bafeef
child 458	b157a354003f
permissions	-rw-r--r--