1 /*
   2  * Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.java.util.jar.pack;
  27 
  28 import java.util.Arrays;
  29 import java.util.List;
  30 
  31 /**
  32  * Shared constants
  33  * @author John Rose
  34  */
  35 class Constants {
  36 
  37     private Constants(){}
  38 
  39     public static final int JAVA_MAGIC = 0xCAFEBABE;
  40 
  41     /*
  42         Java Class Version numbers history
  43         1.0 to 1.3.X 45,3
  44         1.4 to 1.4.X 46,0
  45         1.5 to 1.5.X 49,0
  46         1.6 to 1.6.X 50,0
  47         1.7 to 1.7.X 51,0
  48         1.8 to 1.8.X 52,0
  49         1.9 to 1.9.X 53,0
  50         1.10 to 1.10.X 54,0
  51         1.11 to 1.11.X 55,0
  52         1.12 to 1.12.X 56,0
  53     */
  54 
  55     public static final Package.Version JAVA_MIN_CLASS_VERSION =
  56             Package.Version.of(45, 03);
  57 
  58     public static final Package.Version JAVA5_MAX_CLASS_VERSION =
  59             Package.Version.of(49, 00);
  60 
  61     public static final Package.Version JAVA6_MAX_CLASS_VERSION =
  62             Package.Version.of(50, 00);
  63 
  64     public static final Package.Version JAVA7_MAX_CLASS_VERSION =
  65             Package.Version.of(51, 00);
  66 
  67     public static final Package.Version JAVA8_MAX_CLASS_VERSION =
  68             Package.Version.of(52, 00);
  69 
  70     public static final Package.Version JAVA9_MAX_CLASS_VERSION =
  71             Package.Version.of(53, 00);
  72 
  73     public static final Package.Version JAVA10_MAX_CLASS_VERSION =
  74             Package.Version.of(54, 00);
  75 
  76     public static final Package.Version JAVA11_MAX_CLASS_VERSION =
  77             Package.Version.of(55, 00);
  78 
  79     public static final Package.Version JAVA12_MAX_CLASS_VERSION =
  80             Package.Version.of(56, 00);
  81 
  82     public static final int JAVA_PACKAGE_MAGIC = 0xCAFED00D;
  83 
  84     public static final Package.Version JAVA5_PACKAGE_VERSION =
  85             Package.Version.of(150, 7);
  86 
  87     public static final Package.Version JAVA6_PACKAGE_VERSION =
  88             Package.Version.of(160, 1);
  89 
  90     public static final Package.Version JAVA7_PACKAGE_VERSION =
  91             Package.Version.of(170, 1);
  92 
  93     public static final Package.Version JAVA8_PACKAGE_VERSION =
  94             Package.Version.of(171, 0);
  95 
  96     // upper limit, should point to the latest class version
  97     public static final Package.Version JAVA_MAX_CLASS_VERSION =
  98             JAVA12_MAX_CLASS_VERSION;
  99 
 100     // upper limit should point to the latest package version, for version info!.
 101     public static final Package.Version MAX_PACKAGE_VERSION =
 102             JAVA7_PACKAGE_VERSION;
 103 
 104     public static final int CONSTANT_POOL_INDEX_LIMIT  = 0x10000;
 105     public static final int CONSTANT_POOL_NARROW_LIMIT = 0x00100;
 106 
 107     public static final String JAVA_SIGNATURE_CHARS = "BSCIJFDZLV([";
 108 
 109     public static final byte CONSTANT_Utf8 = 1;
 110     public static final byte CONSTANT_unused2 = 2;  // unused, was Unicode
 111     public static final byte CONSTANT_Integer = 3;
 112     public static final byte CONSTANT_Float = 4;
 113     public static final byte CONSTANT_Long = 5;
 114     public static final byte CONSTANT_Double = 6;
 115     public static final byte CONSTANT_Class = 7;
 116     public static final byte CONSTANT_String = 8;
 117     public static final byte CONSTANT_Fieldref = 9;
 118     public static final byte CONSTANT_Methodref = 10;
 119     public static final byte CONSTANT_InterfaceMethodref = 11;
 120     public static final byte CONSTANT_NameandType = 12;
 121     public static final byte CONSTANT_unused13 = 13;
 122     public static final byte CONSTANT_unused14 = 14;
 123     public static final byte CONSTANT_MethodHandle = 15;
 124     public static final byte CONSTANT_MethodType = 16;
 125     public static final byte CONSTANT_unused17 = 17;  // unused
 126     public static final byte CONSTANT_InvokeDynamic = 18;
 127 
 128     // pseudo-constants:
 129     public static final byte CONSTANT_None = 0;
 130     public static final byte CONSTANT_Signature = CONSTANT_unused13;
 131     public static final byte CONSTANT_BootstrapMethod = CONSTANT_unused17; // used only in InvokeDynamic constants
 132     public static final byte CONSTANT_Limit = 19;
 133 
 134     public static final byte CONSTANT_All = 50;  // combined global map
 135     public static final byte CONSTANT_LoadableValue = 51; // used for 'KL' and qldc operands
 136     public static final byte CONSTANT_AnyMember = 52; // union of refs to field or (interface) method
 137     public static final byte CONSTANT_FieldSpecific = 53; // used only for 'KQ' ConstantValue attrs
 138     public static final byte CONSTANT_GroupFirst = CONSTANT_All;
 139     public static final byte CONSTANT_GroupLimit = CONSTANT_FieldSpecific+1;
 140 
 141     // CONSTANT_MethodHandle reference kinds
 142     public static final byte REF_getField = 1;
 143     public static final byte REF_getStatic = 2;
 144     public static final byte REF_putField = 3;
 145     public static final byte REF_putStatic = 4;
 146     public static final byte REF_invokeVirtual = 5;
 147     public static final byte REF_invokeStatic = 6;
 148     public static final byte REF_invokeSpecial = 7;
 149     public static final byte REF_newInvokeSpecial = 8;
 150     public static final byte REF_invokeInterface = 9;
 151 
 152     // pseudo-access bits
 153     public static final int ACC_IC_LONG_FORM   = (1<<16); //for ic_flags
 154 
 155     // attribute "context types"
 156     public static final int ATTR_CONTEXT_CLASS  = 0;
 157     public static final int ATTR_CONTEXT_FIELD  = 1;
 158     public static final int ATTR_CONTEXT_METHOD = 2;
 159     public static final int ATTR_CONTEXT_CODE   = 3;
 160     public static final int ATTR_CONTEXT_LIMIT  = 4;
 161     public static final String[] ATTR_CONTEXT_NAME
 162         = { "class", "field", "method", "code" };
 163 
 164     // predefined attr bits
 165     public static final int
 166         X_ATTR_OVERFLOW = 16,
 167         CLASS_ATTR_SourceFile = 17,
 168         METHOD_ATTR_Code = 17,
 169         FIELD_ATTR_ConstantValue = 17,
 170         CLASS_ATTR_EnclosingMethod = 18,
 171         METHOD_ATTR_Exceptions = 18,
 172         X_ATTR_Signature = 19,
 173         X_ATTR_Deprecated = 20,
 174         X_ATTR_RuntimeVisibleAnnotations = 21,
 175         X_ATTR_RuntimeInvisibleAnnotations = 22,
 176         METHOD_ATTR_RuntimeVisibleParameterAnnotations = 23,
 177         CLASS_ATTR_InnerClasses = 23,
 178         METHOD_ATTR_RuntimeInvisibleParameterAnnotations = 24,
 179         CLASS_ATTR_ClassFile_version = 24,
 180         METHOD_ATTR_AnnotationDefault = 25,
 181         METHOD_ATTR_MethodParameters = 26,           // JDK8
 182         X_ATTR_RuntimeVisibleTypeAnnotations = 27,   // JDK8
 183         X_ATTR_RuntimeInvisibleTypeAnnotations = 28, // JDK8
 184         CODE_ATTR_StackMapTable = 0,  // new in Java 6
 185         CODE_ATTR_LineNumberTable = 1,
 186         CODE_ATTR_LocalVariableTable = 2,
 187         CODE_ATTR_LocalVariableTypeTable = 3;
 188 
 189     // File option bits, from LSB in ascending bit position.
 190     public static final int FO_DEFLATE_HINT           = 1<<0;
 191     public static final int FO_IS_CLASS_STUB          = 1<<1;
 192 
 193     // Archive option bits, from LSB in ascending bit position:
 194     public static final int AO_HAVE_SPECIAL_FORMATS   = 1<<0;
 195     public static final int AO_HAVE_CP_NUMBERS        = 1<<1;
 196     public static final int AO_HAVE_ALL_CODE_FLAGS    = 1<<2;
 197     public static final int AO_HAVE_CP_EXTRAS         = 1<<3;
 198     public static final int AO_HAVE_FILE_HEADERS      = 1<<4;
 199     public static final int AO_DEFLATE_HINT           = 1<<5;
 200     public static final int AO_HAVE_FILE_MODTIME      = 1<<6;
 201     public static final int AO_HAVE_FILE_OPTIONS      = 1<<7;
 202     public static final int AO_HAVE_FILE_SIZE_HI      = 1<<8;
 203     public static final int AO_HAVE_CLASS_FLAGS_HI    = 1<<9;
 204     public static final int AO_HAVE_FIELD_FLAGS_HI    = 1<<10;
 205     public static final int AO_HAVE_METHOD_FLAGS_HI   = 1<<11;
 206     public static final int AO_HAVE_CODE_FLAGS_HI     = 1<<12;
 207     public static final int AO_UNUSED_MBZ          = (-1)<<13;  // option bits reserved for future use
 208 
 209     public static final int LG_AO_HAVE_XXX_FLAGS_HI   = 9;
 210 
 211     // visitRefs modes:
 212     static final int VRM_CLASSIC = 0;
 213     static final int VRM_PACKAGE = 1;
 214 
 215     public static final int NO_MODTIME = 0;  // null modtime value
 216 
 217     // some comstantly empty containers
 218     public static final int[]        noInts = {};
 219     public static final byte[]       noBytes = {};
 220     public static final Object[]     noValues = {};
 221     public static final String[]     noStrings = {};
 222     public static final List<Object> emptyList = Arrays.asList(noValues);
 223 
 224     // meta-coding
 225     public static final int
 226         _meta_default = 0,
 227         _meta_canon_min = 1,
 228         _meta_canon_max = 115,
 229         _meta_arb = 116,
 230         _meta_run = 117,
 231         _meta_pop = 141,
 232         _meta_limit = 189;
 233 
 234     // bytecodes
 235     public static final int
 236         _nop                  =   0, // 0x00
 237         _aconst_null          =   1, // 0x01
 238         _iconst_m1            =   2, // 0x02
 239         _iconst_0             =   3, // 0x03
 240         _iconst_1             =   4, // 0x04
 241         _iconst_2             =   5, // 0x05
 242         _iconst_3             =   6, // 0x06
 243         _iconst_4             =   7, // 0x07
 244         _iconst_5             =   8, // 0x08
 245         _lconst_0             =   9, // 0x09
 246         _lconst_1             =  10, // 0x0a
 247         _fconst_0             =  11, // 0x0b
 248         _fconst_1             =  12, // 0x0c
 249         _fconst_2             =  13, // 0x0d
 250         _dconst_0             =  14, // 0x0e
 251         _dconst_1             =  15, // 0x0f
 252         _bipush               =  16, // 0x10
 253         _sipush               =  17, // 0x11
 254         _ldc                  =  18, // 0x12
 255         _ldc_w                =  19, // 0x13
 256         _ldc2_w               =  20, // 0x14
 257         _iload                =  21, // 0x15
 258         _lload                =  22, // 0x16
 259         _fload                =  23, // 0x17
 260         _dload                =  24, // 0x18
 261         _aload                =  25, // 0x19
 262         _iload_0              =  26, // 0x1a
 263         _iload_1              =  27, // 0x1b
 264         _iload_2              =  28, // 0x1c
 265         _iload_3              =  29, // 0x1d
 266         _lload_0              =  30, // 0x1e
 267         _lload_1              =  31, // 0x1f
 268         _lload_2              =  32, // 0x20
 269         _lload_3              =  33, // 0x21
 270         _fload_0              =  34, // 0x22
 271         _fload_1              =  35, // 0x23
 272         _fload_2              =  36, // 0x24
 273         _fload_3              =  37, // 0x25
 274         _dload_0              =  38, // 0x26
 275         _dload_1              =  39, // 0x27
 276         _dload_2              =  40, // 0x28
 277         _dload_3              =  41, // 0x29
 278         _aload_0              =  42, // 0x2a
 279         _aload_1              =  43, // 0x2b
 280         _aload_2              =  44, // 0x2c
 281         _aload_3              =  45, // 0x2d
 282         _iaload               =  46, // 0x2e
 283         _laload               =  47, // 0x2f
 284         _faload               =  48, // 0x30
 285         _daload               =  49, // 0x31
 286         _aaload               =  50, // 0x32
 287         _baload               =  51, // 0x33
 288         _caload               =  52, // 0x34
 289         _saload               =  53, // 0x35
 290         _istore               =  54, // 0x36
 291         _lstore               =  55, // 0x37
 292         _fstore               =  56, // 0x38
 293         _dstore               =  57, // 0x39
 294         _astore               =  58, // 0x3a
 295         _istore_0             =  59, // 0x3b
 296         _istore_1             =  60, // 0x3c
 297         _istore_2             =  61, // 0x3d
 298         _istore_3             =  62, // 0x3e
 299         _lstore_0             =  63, // 0x3f
 300         _lstore_1             =  64, // 0x40
 301         _lstore_2             =  65, // 0x41
 302         _lstore_3             =  66, // 0x42
 303         _fstore_0             =  67, // 0x43
 304         _fstore_1             =  68, // 0x44
 305         _fstore_2             =  69, // 0x45
 306         _fstore_3             =  70, // 0x46
 307         _dstore_0             =  71, // 0x47
 308         _dstore_1             =  72, // 0x48
 309         _dstore_2             =  73, // 0x49
 310         _dstore_3             =  74, // 0x4a
 311         _astore_0             =  75, // 0x4b
 312         _astore_1             =  76, // 0x4c
 313         _astore_2             =  77, // 0x4d
 314         _astore_3             =  78, // 0x4e
 315         _iastore              =  79, // 0x4f
 316         _lastore              =  80, // 0x50
 317         _fastore              =  81, // 0x51
 318         _dastore              =  82, // 0x52
 319         _aastore              =  83, // 0x53
 320         _bastore              =  84, // 0x54
 321         _castore              =  85, // 0x55
 322         _sastore              =  86, // 0x56
 323         _pop                  =  87, // 0x57
 324         _pop2                 =  88, // 0x58
 325         _dup                  =  89, // 0x59
 326         _dup_x1               =  90, // 0x5a
 327         _dup_x2               =  91, // 0x5b
 328         _dup2                 =  92, // 0x5c
 329         _dup2_x1              =  93, // 0x5d
 330         _dup2_x2              =  94, // 0x5e
 331         _swap                 =  95, // 0x5f
 332         _iadd                 =  96, // 0x60
 333         _ladd                 =  97, // 0x61
 334         _fadd                 =  98, // 0x62
 335         _dadd                 =  99, // 0x63
 336         _isub                 = 100, // 0x64
 337         _lsub                 = 101, // 0x65
 338         _fsub                 = 102, // 0x66
 339         _dsub                 = 103, // 0x67
 340         _imul                 = 104, // 0x68
 341         _lmul                 = 105, // 0x69
 342         _fmul                 = 106, // 0x6a
 343         _dmul                 = 107, // 0x6b
 344         _idiv                 = 108, // 0x6c
 345         _ldiv                 = 109, // 0x6d
 346         _fdiv                 = 110, // 0x6e
 347         _ddiv                 = 111, // 0x6f
 348         _irem                 = 112, // 0x70
 349         _lrem                 = 113, // 0x71
 350         _frem                 = 114, // 0x72
 351         _drem                 = 115, // 0x73
 352         _ineg                 = 116, // 0x74
 353         _lneg                 = 117, // 0x75
 354         _fneg                 = 118, // 0x76
 355         _dneg                 = 119, // 0x77
 356         _ishl                 = 120, // 0x78
 357         _lshl                 = 121, // 0x79
 358         _ishr                 = 122, // 0x7a
 359         _lshr                 = 123, // 0x7b
 360         _iushr                = 124, // 0x7c
 361         _lushr                = 125, // 0x7d
 362         _iand                 = 126, // 0x7e
 363         _land                 = 127, // 0x7f
 364         _ior                  = 128, // 0x80
 365         _lor                  = 129, // 0x81
 366         _ixor                 = 130, // 0x82
 367         _lxor                 = 131, // 0x83
 368         _iinc                 = 132, // 0x84
 369         _i2l                  = 133, // 0x85
 370         _i2f                  = 134, // 0x86
 371         _i2d                  = 135, // 0x87
 372         _l2i                  = 136, // 0x88
 373         _l2f                  = 137, // 0x89
 374         _l2d                  = 138, // 0x8a
 375         _f2i                  = 139, // 0x8b
 376         _f2l                  = 140, // 0x8c
 377         _f2d                  = 141, // 0x8d
 378         _d2i                  = 142, // 0x8e
 379         _d2l                  = 143, // 0x8f
 380         _d2f                  = 144, // 0x90
 381         _i2b                  = 145, // 0x91
 382         _i2c                  = 146, // 0x92
 383         _i2s                  = 147, // 0x93
 384         _lcmp                 = 148, // 0x94
 385         _fcmpl                = 149, // 0x95
 386         _fcmpg                = 150, // 0x96
 387         _dcmpl                = 151, // 0x97
 388         _dcmpg                = 152, // 0x98
 389         _ifeq                 = 153, // 0x99
 390         _ifne                 = 154, // 0x9a
 391         _iflt                 = 155, // 0x9b
 392         _ifge                 = 156, // 0x9c
 393         _ifgt                 = 157, // 0x9d
 394         _ifle                 = 158, // 0x9e
 395         _if_icmpeq            = 159, // 0x9f
 396         _if_icmpne            = 160, // 0xa0
 397         _if_icmplt            = 161, // 0xa1
 398         _if_icmpge            = 162, // 0xa2
 399         _if_icmpgt            = 163, // 0xa3
 400         _if_icmple            = 164, // 0xa4
 401         _if_acmpeq            = 165, // 0xa5
 402         _if_acmpne            = 166, // 0xa6
 403         _goto                 = 167, // 0xa7
 404         _jsr                  = 168, // 0xa8
 405         _ret                  = 169, // 0xa9
 406         _tableswitch          = 170, // 0xaa
 407         _lookupswitch         = 171, // 0xab
 408         _ireturn              = 172, // 0xac
 409         _lreturn              = 173, // 0xad
 410         _freturn              = 174, // 0xae
 411         _dreturn              = 175, // 0xaf
 412         _areturn              = 176, // 0xb0
 413         _return               = 177, // 0xb1
 414         _getstatic            = 178, // 0xb2
 415         _putstatic            = 179, // 0xb3
 416         _getfield             = 180, // 0xb4
 417         _putfield             = 181, // 0xb5
 418         _invokevirtual        = 182, // 0xb6
 419         _invokespecial        = 183, // 0xb7
 420         _invokestatic         = 184, // 0xb8
 421         _invokeinterface      = 185, // 0xb9
 422         _invokedynamic        = 186, // 0xba
 423         _new                  = 187, // 0xbb
 424         _newarray             = 188, // 0xbc
 425         _anewarray            = 189, // 0xbd
 426         _arraylength          = 190, // 0xbe
 427         _athrow               = 191, // 0xbf
 428         _checkcast            = 192, // 0xc0
 429         _instanceof           = 193, // 0xc1
 430         _monitorenter         = 194, // 0xc2
 431         _monitorexit          = 195, // 0xc3
 432         _wide                 = 196, // 0xc4
 433         _multianewarray       = 197, // 0xc5
 434         _ifnull               = 198, // 0xc6
 435         _ifnonnull            = 199, // 0xc7
 436         _goto_w               = 200, // 0xc8
 437         _jsr_w                = 201, // 0xc9
 438         _bytecode_limit       = 202; // 0xca
 439 
 440     // End marker, used to terminate bytecode sequences:
 441     public static final int _end_marker = 255;
 442     // Escapes:
 443     public static final int _byte_escape = 254;
 444     public static final int _ref_escape = 253;
 445 
 446     // Self-relative pseudo-opcodes for better compression.
 447     // A "linker op" is a bytecode which links to a class member.
 448     // (But in what follows, "invokeinterface" ops are excluded.)
 449     //
 450     // A "self linker op" is a variant bytecode which works only
 451     // with the current class or its super.  Because the number of
 452     // possible targets is small, it admits a more compact encoding.
 453     // Self linker ops are allowed to absorb a previous "aload_0" op.
 454     // There are (7 * 4) self linker ops (super or not, aload_0 or not).
 455     //
 456     // For simplicity, we define the full symmetric set of variants.
 457     // However, some of them are relatively useless.
 458     // Self linker ops are enabled by Pack.selfCallVariants (true).
 459     public static final int _first_linker_op = _getstatic;
 460     public static final int _last_linker_op  = _invokestatic;
 461     public static final int _num_linker_ops  = (_last_linker_op - _first_linker_op) + 1;
 462     public static final int _self_linker_op  = _bytecode_limit;
 463     public static final int _self_linker_aload_flag = 1*_num_linker_ops;
 464     public static final int _self_linker_super_flag = 2*_num_linker_ops;
 465     public static final int _self_linker_limit = _self_linker_op + 4*_num_linker_ops;
 466     // An "invoke init" op is a variant of invokespecial which works
 467     // only with the method name "<init>".  There are variants which
 468     // link to the current class, the super class, or the class of the
 469     // immediately previous "newinstance" op.  There are 3 of these ops.
 470     // They all take method signature references as operands.
 471     // Invoke init ops are enabled by Pack.initCallVariants (true).
 472     public static final int _invokeinit_op = _self_linker_limit;
 473     public static final int _invokeinit_self_option = 0;
 474     public static final int _invokeinit_super_option = 1;
 475     public static final int _invokeinit_new_option = 2;
 476     public static final int _invokeinit_limit = _invokeinit_op+3;
 477 
 478     public static final int _pseudo_instruction_limit = _invokeinit_limit;
 479     // linker variant limit == 202+(7*4)+3 == 233
 480 
 481     // Ldc variants support strongly typed references to constants.
 482     // This lets us index constant pool entries completely according to tag,
 483     // which is a great simplification.
 484     // Ldc variants gain us only 0.007% improvement in compression ratio,
 485     // but they simplify the file format greatly.
 486     public static final int _xldc_op = _invokeinit_limit;
 487     public static final int _sldc = _ldc;  // previously named _aldc
 488     public static final int _cldc = _xldc_op+0;
 489     public static final int _ildc = _xldc_op+1;
 490     public static final int _fldc = _xldc_op+2;
 491     public static final int _sldc_w = _ldc_w;  // previously named _aldc_w
 492     public static final int _cldc_w = _xldc_op+3;
 493     public static final int _ildc_w = _xldc_op+4;
 494     public static final int _fldc_w = _xldc_op+5;
 495     public static final int _lldc2_w = _ldc2_w;
 496     public static final int _dldc2_w = _xldc_op+6;
 497     // anything other than primitive, string, or class must be handled with qldc:
 498     public static final int _qldc   = _xldc_op+7;
 499     public static final int _qldc_w = _xldc_op+8;
 500     public static final int _xldc_limit = _xldc_op+9;
 501 
 502     // handling of InterfaceMethodRef
 503     public static final int _invoke_int_op = _xldc_limit;
 504     public static final int _invokespecial_int = _invoke_int_op+0;
 505     public static final int _invokestatic_int = _invoke_int_op+1;
 506     public static final int _invoke_int_limit = _invoke_int_op+2;
 507 }