src/vm/class.cpp

   1 /* src/vm/class.cpp - class related functions
   2
   3    Copyright (C) 1996-2005, 2006, 2007, 2008
   4    CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
   5
   6    This file is part of CACAO.
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22
  23 */
  24
  25
  26 #include "config.h"
  27
  28 #include <assert.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include "vm/types.h"
  34
  35 #include "arch.h"
  36
  37 #include "mm/memory.hpp"
  38
  39 #include "native/llni.h"
  40
  41 #include "threads/lock.hpp"
  42 #include "threads/mutex.hpp"
  43
  44 #include "toolbox/logging.hpp"
  45
  46 #include "vm/array.hpp"
  47 #include "vm/jit/builtin.hpp"
  48 #include "vm/class.hpp"
  49 #include "vm/classcache.hpp"
  50 #include "vm/exceptions.hpp"
  51 #include "vm/global.h"
  52 #include "vm/globals.hpp"
  53 #include "vm/javaobjects.hpp"
  54 #include "vm/linker.hpp"
  55 #include "vm/loader.hpp"
  56 #include "vm/options.h"
  57 #include "vm/resolve.hpp"
  58
  59 #if defined(ENABLE_STATISTICS)
  60 # include "vm/statistics.h"
  61 #endif
  62
  63 #include "vm/suck.hpp"
  64 #include "vm/utf8.h"
  65
  66 #include "vm/jit/asmpart.h"
  67
  68
  69 /* class_set_packagename *******************************************************
  70
  71    Derive the package name from the class name and store it in the
  72    struct.
  73
  74    An internal package name consists of the package name plus the
  75    trailing '/', e.g. "java/lang/".
  76
  77    For classes in the unnamed package, the package name is set to
  78    NULL.
  79
  80 *******************************************************************************/
  81
  82 void class_set_packagename(classinfo *c)
  83 {
  84         char *p;
  85         char *start;
  86
  87         p     = UTF_END(c->name) - 1;
  88         start = c->name->text;
  89
  90         if (c->name->text[0] == '[') {
  91                 /* Set packagename of arrays to the element's package. */
  92
  93                 for (; *start == '['; start++);
  94
  95                 /* Skip the 'L' in arrays of references. */
  96
  97                 if (*start == 'L')
  98                         start++;
  99         }
 100
 101         /* Search for last '/'. */
 102
 103         for (; (p > start) && (*p != '/'); --p);
 104
 105         /* If we found a '/' we set the package name plus the trailing
 106            '/'.  Otherwise we set the packagename to NULL. */
 107
 108         if (p > start)
 109                 c->packagename = utf_new(start, p - start + 1);
 110         else
 111                 c->packagename = NULL;
 112 }
 113
 114
 115 /* class_create_classinfo ******************************************************
 116
 117    Create a new classinfo struct. The class name is set to the given utf *,
 118    most other fields are initialized to zero.
 119
 120    Note: classname may be NULL. In this case a not-yet-named classinfo is
 121          created. The name must be filled in later and class_set_packagename
 122                  must be called after that.
 123
 124 *******************************************************************************/
 125
 126 classinfo *class_create_classinfo(utf *classname)
 127 {
 128         classinfo *c;
 129
 130 #if defined(ENABLE_STATISTICS)
 131         if (opt_stat)
 132                 size_classinfo += sizeof(classinfo);
 133 #endif
 134
 135         /* we use a safe name for temporarily unnamed classes */
 136
 137         if (classname == NULL)
 138                 classname = utf_not_named_yet;
 139
 140 #if !defined(NDEBUG)
 141         if (initverbose)
 142                 log_message_utf("Creating class: ", classname);
 143 #endif
 144
 145 #if !defined(ENABLE_GC_BOEHM)
 146         c = (classinfo *) heap_alloc_uncollectable(sizeof(classinfo));
 147         /*c = NEW(classinfo);
 148         MZERO(c, classinfo, 1);*/
 149 #else
 150         c = GCNEW_UNCOLLECTABLE(classinfo, 1);
 151         /* GCNEW_UNCOLLECTABLE clears the allocated memory */
 152 #endif
 153
 154         c->name = classname;
 155
 156         /* Set the header.vftbl of all loaded classes to the one of
 157        java.lang.Class, so Java code can use a class as object. */
 158
 159         if (class_java_lang_Class != NULL)
 160                 if (class_java_lang_Class->vftbl != NULL)
 161                         c->object.header.vftbl = class_java_lang_Class->vftbl;
 162
 163 #if defined(ENABLE_JAVASE)
 164         /* check if the class is a reference class and flag it */
 165
 166         if (classname == utf_java_lang_ref_SoftReference) {
 167                 c->flags |= ACC_CLASS_REFERENCE_SOFT;
 168         }
 169         else if (classname == utf_java_lang_ref_WeakReference) {
 170                 c->flags |= ACC_CLASS_REFERENCE_WEAK;
 171         }
 172         else if (classname == utf_java_lang_ref_PhantomReference) {
 173                 c->flags |= ACC_CLASS_REFERENCE_PHANTOM;
 174         }
 175 #endif
 176
 177         if (classname != utf_not_named_yet)
 178                 class_set_packagename(c);
 179
 180         c->object.header.lockword.init();
 181
 182         return c;
 183 }
 184
 185
 186 /* class_postset_header_vftbl **************************************************
 187
 188    Set the header.vftbl of all classes created before java.lang.Class
 189    was linked.  This is necessary that Java code can use a class as
 190    object.
 191
 192 *******************************************************************************/
 193
 194 void class_postset_header_vftbl(void)
 195 {
 196         classinfo *c;
 197         u4 slot;
 198         classcache_name_entry *nmen;
 199         classcache_class_entry *clsen;
 200
 201         assert(class_java_lang_Class);
 202
 203         for (slot = 0; slot < hashtable_classcache.size; slot++) {
 204                 nmen = (classcache_name_entry *) hashtable_classcache.ptr[slot];
 205
 206                 for (; nmen; nmen = nmen->hashlink) {
 207                         /* iterate over all class entries */
 208
 209                         for (clsen = nmen->classes; clsen; clsen = clsen->next) {
 210                                 c = clsen->classobj;
 211
 212                                 /* now set the the vftbl */
 213
 214                                 if (c->object.header.vftbl == NULL)
 215                                         c->object.header.vftbl = class_java_lang_Class->vftbl;
 216                         }
 217                 }
 218         }
 219 }
 220
 221 /* class_define ****************************************************************
 222
 223    Calls the loader and defines a class in the VM.
 224
 225 *******************************************************************************/
 226
 227 classinfo *class_define(utf *name, classloader_t *cl, int32_t length, uint8_t *data, java_handle_t *pd)
 228 {
 229         classinfo   *c;
 230         classinfo   *r;
 231         classbuffer *cb;
 232
 233         if (name != NULL) {
 234                 /* check if this class has already been defined */
 235
 236                 c = classcache_lookup_defined_or_initiated(cl, name);
 237
 238                 if (c != NULL) {
 239                         exceptions_throw_linkageerror("duplicate class definition: ", c);
 240                         return NULL;
 241                 }
 242         }
 243
 244         /* create a new classinfo struct */
 245
 246         c = class_create_classinfo(name);
 247
 248 #if defined(ENABLE_STATISTICS)
 249         /* measure time */
 250
 251         if (opt_getloadingtime)
 252                 loadingtime_start();
 253 #endif
 254
 255         /* build a classbuffer with the given data */
 256
 257         cb = NEW(classbuffer);
 258
 259         cb->clazz = c;
 260         cb->size  = length;
 261         cb->data  = data;
 262         cb->pos   = cb->data;
 263
 264         /* preset the defining classloader */
 265
 266         c->classloader = cl;
 267
 268         /* load the class from this buffer */
 269
 270         r = load_class_from_classbuffer(cb);
 271
 272         /* free memory */
 273
 274         FREE(cb, classbuffer);
 275
 276 #if defined(ENABLE_STATISTICS)
 277         /* measure time */
 278
 279         if (opt_getloadingtime)
 280                 loadingtime_stop();
 281 #endif
 282
 283         if (r == NULL) {
 284                 /* If return value is NULL, we had a problem and the class is
 285                    not loaded.  Now free the allocated memory, otherwise we
 286                    could run into a DOS. */
 287
 288                 class_free(c);
 289
 290                 return NULL;
 291         }
 292
 293 #if defined(ENABLE_JAVASE)
 294 # if defined(WITH_JAVA_RUNTIME_LIBRARY_OPENJDK)
 295         /* Store the protection domain. */
 296
 297         c->protectiondomain = pd;
 298 # endif
 299 #endif
 300
 301         /* Store the newly defined class in the class cache. This call
 302            also checks whether a class of the same name has already been
 303            defined by the same defining loader, and if so, replaces the
 304            newly created class by the one defined earlier. */
 305
 306         /* Important: The classinfo given to classcache_store must be
 307                       fully prepared because another thread may return
 308                       this pointer after the lookup at to top of this
 309                       function directly after the class cache lock has
 310                       been released. */
 311
 312         c = classcache_store(cl, c, true);
 313
 314         return c;
 315 }
 316
 317
 318 /* class_load_attribute_sourcefile *********************************************
 319
 320    SourceFile_attribute {
 321        u2 attribute_name_index;
 322        u4 attribute_length;
 323            u2 sourcefile_index;
 324    }
 325
 326 *******************************************************************************/
 327
 328 static bool class_load_attribute_sourcefile(classbuffer *cb)
 329 {
 330         classinfo *c;
 331         u4         attribute_length;
 332         u2         sourcefile_index;
 333         utf       *sourcefile;
 334
 335         /* get classinfo */
 336
 337         c = cb->clazz;
 338
 339         /* check buffer size */
 340
 341         if (!suck_check_classbuffer_size(cb, 4 + 2))
 342                 return false;
 343
 344         /* check attribute length */
 345
 346         attribute_length = suck_u4(cb);
 347
 348         if (attribute_length != 2) {
 349                 exceptions_throw_classformaterror(c, "Wrong size for VALUE attribute");
 350                 return false;
 351         }
 352
 353         /* there can be no more than one SourceFile attribute */
 354
 355         if (c->sourcefile != NULL) {
 356                 exceptions_throw_classformaterror(c, "Multiple SourceFile attributes");
 357                 return false;
 358         }
 359
 360         /* get sourcefile */
 361
 362         sourcefile_index = suck_u2(cb);
 363         sourcefile = (utf*) class_getconstant(c, sourcefile_index, CONSTANT_Utf8);
 364
 365         if (sourcefile == NULL)
 366                 return false;
 367
 368         /* store sourcefile */
 369
 370         c->sourcefile = sourcefile;
 371
 372         return true;
 373 }
 374
 375
 376 /* class_load_attribute_enclosingmethod ****************************************
 377
 378    EnclosingMethod_attribute {
 379        u2 attribute_name_index;
 380        u4 attribute_length;
 381            u2 class_index;
 382            u2 method_index;
 383    }
 384
 385 *******************************************************************************/
 386
 387 #if defined(ENABLE_JAVASE)
 388 static bool class_load_attribute_enclosingmethod(classbuffer *cb)
 389 {
 390         classinfo             *c;
 391         u4                     attribute_length;
 392         u2                     class_index;
 393         u2                     method_index;
 394         classref_or_classinfo  cr;
 395         constant_nameandtype  *cn;
 396
 397         /* get classinfo */
 398
 399         c = cb->clazz;
 400
 401         /* check buffer size */
 402
 403         if (!suck_check_classbuffer_size(cb, 4 + 2 + 2))
 404                 return false;
 405
 406         /* check attribute length */
 407
 408         attribute_length = suck_u4(cb);
 409
 410         if (attribute_length != 4) {
 411                 exceptions_throw_classformaterror(c, "Wrong size for VALUE attribute");
 412                 return false;
 413         }
 414
 415         /* there can be no more than one EnclosingMethod attribute */
 416
 417         if (c->enclosingmethod != NULL) {
 418                 exceptions_throw_classformaterror(c, "Multiple EnclosingMethod attributes");
 419                 return false;
 420         }
 421
 422         /* get class index */
 423
 424         class_index = suck_u2(cb);
 425         cr.ref = (constant_classref*) innerclass_getconstant(c, class_index, CONSTANT_Class);
 426
 427         /* get method index */
 428
 429         method_index = suck_u2(cb);
 430         cn = (constant_nameandtype*) innerclass_getconstant(c, method_index, CONSTANT_NameAndType);
 431
 432         /* store info in classinfo */
 433
 434         c->enclosingclass.any = cr.any;
 435         c->enclosingmethod    = cn;
 436
 437         return true;
 438 }
 439 #endif /* defined(ENABLE_JAVASE) */
 440
 441
 442 /* class_load_attributes *******************************************************
 443
 444    Read attributes from ClassFile.
 445
 446    attribute_info {
 447        u2 attribute_name_index;
 448        u4 attribute_length;
 449        u1 info[attribute_length];
 450    }
 451
 452    InnerClasses_attribute {
 453        u2 attribute_name_index;
 454        u4 attribute_length;
 455    }
 456
 457 *******************************************************************************/
 458
 459 bool class_load_attributes(classbuffer *cb)
 460 {
 461         classinfo             *c;
 462         uint16_t               attributes_count;
 463         uint16_t               attribute_name_index;
 464         utf                   *attribute_name;
 465         innerclassinfo        *info;
 466         classref_or_classinfo  inner;
 467         classref_or_classinfo  outer;
 468         utf                   *name;
 469         uint16_t               flags;
 470         int                    i, j;
 471
 472         c = cb->clazz;
 473
 474         /* get attributes count */
 475
 476         if (!suck_check_classbuffer_size(cb, 2))
 477                 return false;
 478
 479         attributes_count = suck_u2(cb);
 480
 481         for (i = 0; i < attributes_count; i++) {
 482                 /* get attribute name */
 483
 484                 if (!suck_check_classbuffer_size(cb, 2))
 485                         return false;
 486
 487                 attribute_name_index = suck_u2(cb);
 488                 attribute_name =
 489                         (utf*) class_getconstant(c, attribute_name_index, CONSTANT_Utf8);
 490
 491                 if (attribute_name == NULL)
 492                         return false;
 493
 494                 if (attribute_name == utf_InnerClasses) {
 495                         /* InnerClasses */
 496
 497                         if (c->innerclass != NULL) {
 498                                 exceptions_throw_classformaterror(c, "Multiple InnerClasses attributes");
 499                                 return false;
 500                         }
 501
 502                         if (!suck_check_classbuffer_size(cb, 4 + 2))
 503                                 return false;
 504
 505                         /* skip attribute length */
 506                         suck_u4(cb);
 507
 508                         /* number of records */
 509                         c->innerclasscount = suck_u2(cb);
 510
 511                         if (!suck_check_classbuffer_size(cb, (2 + 2 + 2 + 2) * c->innerclasscount))
 512                                 return false;
 513
 514                         /* allocate memory for innerclass structure */
 515                         c->innerclass = MNEW(innerclassinfo, c->innerclasscount);
 516
 517                         for (j = 0; j < c->innerclasscount; j++) {
 518                                 /* The innerclass structure contains a class with an encoded
 519                                    name, its defining scope, its simple name and a bitmask of
 520                                    the access flags. */
 521
 522                                 info = c->innerclass + j;
 523
 524                                 inner.ref = (constant_classref*) innerclass_getconstant(c, suck_u2(cb), CONSTANT_Class);
 525                                 outer.ref = (constant_classref*) innerclass_getconstant(c, suck_u2(cb), CONSTANT_Class);
 526                                 name      = (utf*) innerclass_getconstant(c, suck_u2(cb), CONSTANT_Utf8);
 527                                 flags     = suck_u2(cb);
 528
 529                                 /* If the current inner-class is the currently loaded
 530                                    class check for some special flags. */
 531
 532                                 if (inner.ref->name == c->name) {
 533                                         /* If an inner-class is not a member, its
 534                                            outer-class is NULL. */
 535
 536                                         if (outer.ref != NULL) {
 537                                                 c->flags |= ACC_CLASS_MEMBER;
 538
 539                                                 /* A member class doesn't have an
 540                                                    EnclosingMethod attribute, so set the
 541                                                    enclosing-class to be the same as the
 542                                                    declaring-class. */
 543
 544                                                 c->declaringclass = outer;
 545                                                 c->enclosingclass = outer;
 546                                         }
 547
 548                                         /* If an inner-class is anonymous, its name is
 549                                            NULL. */
 550
 551                                         if (name == NULL)
 552                                                 c->flags |= ACC_CLASS_ANONYMOUS;
 553                                 }
 554
 555                                 info->inner_class = inner;
 556                                 info->outer_class = outer;
 557                                 info->name        = name;
 558                                 info->flags       = flags;
 559                         }
 560                 }
 561                 else if (attribute_name == utf_SourceFile) {
 562                         /* SourceFile */
 563
 564                         if (!class_load_attribute_sourcefile(cb))
 565                                 return false;
 566                 }
 567 #if defined(ENABLE_JAVASE)
 568                 else if (attribute_name == utf_EnclosingMethod) {
 569                         /* EnclosingMethod */
 570
 571                         if (!class_load_attribute_enclosingmethod(cb))
 572                                 return false;
 573                 }
 574                 else if (attribute_name == utf_Signature) {
 575                         /* Signature */
 576
 577                         if (!loader_load_attribute_signature(cb, &(c->signature)))
 578                                 return false;
 579                 }
 580 #endif
 581
 582 #if defined(ENABLE_ANNOTATIONS)
 583                 else if (attribute_name == utf_RuntimeVisibleAnnotations) {
 584                         /* RuntimeVisibleAnnotations */
 585                         if (!annotation_load_class_attribute_runtimevisibleannotations(cb))
 586                                 return false;
 587                 }
 588                 else if (attribute_name == utf_RuntimeInvisibleAnnotations) {
 589                         /* RuntimeInvisibleAnnotations */
 590                         if (!annotation_load_class_attribute_runtimeinvisibleannotations(cb))
 591                                 return false;
 592                 }
 593 #endif
 594
 595                 else {
 596                         /* unknown attribute */
 597
 598                         if (!loader_skip_attribute_body(cb))
 599                                 return false;
 600                 }
 601         }
 602
 603         return true;
 604 }
 605
 606
 607 /* class_freepool **************************************************************
 608
 609         Frees all resources used by this classes Constant Pool.
 610
 611 *******************************************************************************/
 612
 613 static void class_freecpool(classinfo *c)
 614 {
 615         u4 idx;
 616         u4 tag;
 617         void* info;
 618
 619         if (c->cptags && c->cpinfos) {
 620                 for (idx = 0; idx < c->cpcount; idx++) {
 621                         tag = c->cptags[idx];
 622                         info = c->cpinfos[idx];
 623
 624                         if (info != NULL) {
 625                                 switch (tag) {
 626                                 case CONSTANT_Fieldref:
 627                                 case CONSTANT_Methodref:
 628                                 case CONSTANT_InterfaceMethodref:
 629                                         FREE(info, constant_FMIref);
 630                                         break;
 631                                 case CONSTANT_Integer:
 632                                         FREE(info, constant_integer);
 633                                         break;
 634                                 case CONSTANT_Float:
 635                                         FREE(info, constant_float);
 636                                         break;
 637                                 case CONSTANT_Long:
 638                                         FREE(info, constant_long);
 639                                         break;
 640                                 case CONSTANT_Double:
 641                                         FREE(info, constant_double);
 642                                         break;
 643                                 case CONSTANT_NameAndType:
 644                                         FREE(info, constant_nameandtype);
 645                                         break;
 646                                 }
 647                         }
 648                 }
 649         }
 650
 651         if (c->cptags)
 652                 MFREE(c->cptags, u1, c->cpcount);
 653
 654         if (c->cpinfos)
 655                 MFREE(c->cpinfos, void*, c->cpcount);
 656 }
 657
 658
 659 /* class_getconstant ***********************************************************
 660
 661    Retrieves the value at position 'pos' of the constantpool of a
 662    class. If the type of the value is other than 'ctype', an error is
 663    thrown.
 664
 665 *******************************************************************************/
 666
 667 void* class_getconstant(classinfo *c, u4 pos, u4 ctype)
 668 {
 669         /* check index and type of constantpool entry */
 670         /* (pos == 0 is caught by type comparison) */
 671
 672         if ((pos >= c->cpcount) || (c->cptags[pos] != ctype)) {
 673                 exceptions_throw_classformaterror(c, "Illegal constant pool index");
 674                 return NULL;
 675         }
 676
 677         return c->cpinfos[pos];
 678 }
 679
 680
 681 /* innerclass_getconstant ******************************************************
 682
 683    Like class_getconstant, but if cptags is ZERO, null is returned.
 684
 685 *******************************************************************************/
 686
 687 void* innerclass_getconstant(classinfo *c, u4 pos, u4 ctype)
 688 {
 689         /* invalid position in constantpool */
 690
 691         if (pos >= c->cpcount) {
 692                 exceptions_throw_classformaterror(c, "Illegal constant pool index");
 693                 return NULL;
 694         }
 695
 696         /* constantpool entry of type 0 */
 697
 698         if (c->cptags[pos] == 0)
 699                 return NULL;
 700
 701         /* check type of constantpool entry */
 702
 703         if (c->cptags[pos] != ctype) {
 704                 exceptions_throw_classformaterror(c, "Illegal constant pool index");
 705                 return NULL;
 706         }
 707
 708         return c->cpinfos[pos];
 709 }
 710
 711
 712 /* class_free ******************************************************************
 713
 714    Frees all resources used by the class.
 715
 716 *******************************************************************************/
 717
 718 void class_free(classinfo *c)
 719 {
 720         s4 i;
 721         vftbl_t *v;
 722
 723         class_freecpool(c);
 724
 725         if (c->interfaces != NULL)
 726                 MFREE(c->interfaces, classinfo*, c->interfacescount);
 727
 728         if (c->fields) {
 729                 for (i = 0; i < c->fieldscount; i++)
 730                         field_free(&(c->fields[i]));
 731                 MFREE(c->fields, fieldinfo, c->fieldscount);
 732         }
 733
 734         if (c->methods) {
 735                 for (i = 0; i < c->methodscount; i++)
 736                         method_free(&(c->methods[i]));
 737                 MFREE(c->methods, methodinfo, c->methodscount);
 738         }
 739
 740         if ((v = c->vftbl) != NULL) {
 741                 if (v->arraydesc)
 742                         mem_free(v->arraydesc,sizeof(arraydescriptor));
 743
 744                 for (i = 0; i < v->interfacetablelength; i++) {
 745                         MFREE(v->interfacetable[-i], methodptr, v->interfacevftbllength[i]);
 746                 }
 747                 MFREE(v->interfacevftbllength, s4, v->interfacetablelength);
 748
 749                 i = sizeof(vftbl_t) + sizeof(methodptr) * (v->vftbllength - 1) +
 750                     sizeof(methodptr*) * (v->interfacetablelength -
 751                                          (v->interfacetablelength > 0));
 752                 v = (vftbl_t*) (((methodptr*) v) -
 753                                                 (v->interfacetablelength - 1) * (v->interfacetablelength > 1));
 754                 mem_free(v, i);
 755         }
 756
 757         if (c->innerclass)
 758                 MFREE(c->innerclass, innerclassinfo, c->innerclasscount);
 759
 760         /*      if (c->classvftbl)
 761                 mem_free(c->header.vftbl, sizeof(vftbl) + sizeof(methodptr)*(c->vftbl->vftbllength-1)); */
 762
 763 /*      GCFREE(c); */
 764 }
 765
 766
 767 /* get_array_class *************************************************************
 768
 769    Returns the array class with the given name for the given
 770    classloader, or NULL if an exception occurred.
 771
 772    Note: This function does eager loading.
 773
 774 *******************************************************************************/
 775
 776 static classinfo *get_array_class(utf *name,classloader_t *initloader,
 777                                                                                         classloader_t *defloader,bool link)
 778 {
 779         classinfo *c;
 780
 781         /* lookup this class in the classcache */
 782         c = classcache_lookup(initloader,name);
 783         if (!c)
 784                 c = classcache_lookup_defined(defloader,name);
 785
 786         if (!c) {
 787                 /* we have to create it */
 788                 c = class_create_classinfo(name);
 789                 c = load_newly_created_array(c,initloader);
 790                 if (c == NULL)
 791                         return NULL;
 792         }
 793
 794         assert(c);
 795         assert(c->state & CLASS_LOADED);
 796         assert(c->classloader == defloader);
 797
 798         if (link && !(c->state & CLASS_LINKED))
 799                 if (!link_class(c))
 800                         return NULL;
 801
 802         assert(!link || (c->state & CLASS_LINKED));
 803
 804         return c;
 805 }
 806
 807
 808 /* class_array_of **************************************************************
 809
 810    Returns an array class with the given component class. The array
 811    class is dynamically created if neccessary.
 812
 813 *******************************************************************************/
 814
 815 classinfo *class_array_of(classinfo *component, bool link)
 816 {
 817         classloader_t     *cl;
 818     s4                 namelen;
 819     char              *namebuf;
 820         utf               *u;
 821         classinfo         *c;
 822
 823         cl = component->classloader;
 824
 825     /* Assemble the array class name */
 826     namelen = component->name->blength;
 827
 828     if (component->name->text[0] == '[') {
 829         /* the component is itself an array */
 830         namebuf = MNEW(char, namelen + 1);
 831         namebuf[0] = '[';
 832         MCOPY(namebuf + 1, component->name->text, char, namelen);
 833         namelen++;
 834     }
 835         else {
 836         /* the component is a non-array class */
 837         namebuf = MNEW(char, namelen + 3);
 838         namebuf[0] = '[';
 839         namebuf[1] = 'L';
 840         MCOPY(namebuf + 2, component->name->text, char, namelen);
 841         namebuf[2 + namelen] = ';';
 842         namelen += 3;
 843     }
 844
 845         u = utf_new(namebuf, namelen);
 846
 847         MFREE(namebuf, char, namelen);
 848
 849         c = get_array_class(u, cl, cl, link);
 850
 851         return c;
 852 }
 853
 854
 855 /* class_multiarray_of *********************************************************
 856
 857    Returns an array class with the given dimension and element class.
 858    The array class is dynamically created if neccessary.
 859
 860 *******************************************************************************/
 861
 862 classinfo *class_multiarray_of(s4 dim, classinfo *element, bool link)
 863 {
 864     s4 namelen;
 865     char *namebuf;
 866         classinfo *c;
 867
 868         if (dim < 1) {
 869                 log_text("Invalid array dimension requested");
 870                 assert(0);
 871         }
 872
 873     /* Assemble the array class name */
 874     namelen = element->name->blength;
 875
 876     if (element->name->text[0] == '[') {
 877         /* the element is itself an array */
 878         namebuf = MNEW(char, namelen + dim);
 879         memcpy(namebuf + dim, element->name->text, namelen);
 880         namelen += dim;
 881     }
 882     else {
 883         /* the element is a non-array class */
 884         namebuf = MNEW(char, namelen + 2 + dim);
 885         namebuf[dim] = 'L';
 886         memcpy(namebuf + dim + 1, element->name->text, namelen);
 887         namelen += (2 + dim);
 888         namebuf[namelen - 1] = ';';
 889     }
 890         memset(namebuf, '[', dim);
 891
 892         utf* u = utf_new(namebuf, namelen);
 893
 894         MFREE(namebuf, char, namelen);
 895
 896         c = get_array_class(u,
 897                                                 element->classloader,
 898                                                 element->classloader,
 899                                                 link);
 900
 901         return c;
 902 }
 903
 904
 905 /* class_lookup_classref *******************************************************
 906
 907    Looks up the constant_classref for a given classname in the classref
 908    tables of a class.
 909
 910    IN:
 911        cls..............the class containing the reference
 912            name.............the name of the class refered to
 913
 914     RETURN VALUE:
 915            a pointer to a constant_classref, or
 916            NULL if the reference was not found
 917
 918 *******************************************************************************/
 919
 920 constant_classref *class_lookup_classref(classinfo *cls, utf *name)
 921 {
 922         constant_classref *ref;
 923         extra_classref *xref;
 924         int count;
 925
 926         assert(cls);
 927         assert(name);
 928         assert(!cls->classrefcount || cls->classrefs);
 929
 930         /* first search the main classref table */
 931         count = cls->classrefcount;
 932         ref = cls->classrefs;
 933         for (; count; --count, ++ref)
 934                 if (ref->name == name)
 935                         return ref;
 936
 937         /* next try the list of extra classrefs */
 938         for (xref = cls->extclassrefs; xref; xref = xref->next) {
 939                 if (xref->classref.name == name)
 940                         return &(xref->classref);
 941         }
 942
 943         /* not found */
 944         return NULL;
 945 }
 946
 947
 948 /* class_get_classref **********************************************************
 949
 950    Returns the constant_classref for a given classname.
 951
 952    IN:
 953        cls..............the class containing the reference
 954            name.............the name of the class refered to
 955
 956    RETURN VALUE:
 957        a pointer to a constant_classref (never NULL)
 958
 959    NOTE:
 960        The given name is not checked for validity!
 961
 962 *******************************************************************************/
 963
 964 constant_classref *class_get_classref(classinfo *cls, utf *name)
 965 {
 966         constant_classref *ref;
 967         extra_classref *xref;
 968
 969         assert(cls);
 970         assert(name);
 971
 972         ref = class_lookup_classref(cls,name);
 973         if (ref)
 974                 return ref;
 975
 976         xref = NEW(extra_classref);
 977         CLASSREF_INIT(xref->classref,cls,name);
 978
 979         xref->next = cls->extclassrefs;
 980         cls->extclassrefs = xref;
 981
 982         return &(xref->classref);
 983 }
 984
 985
 986 /* class_get_self_classref *****************************************************
 987
 988    Returns the constant_classref to the class itself.
 989
 990    IN:
 991        cls..............the class containing the reference
 992
 993    RETURN VALUE:
 994        a pointer to a constant_classref (never NULL)
 995
 996 *******************************************************************************/
 997
 998 constant_classref *class_get_self_classref(classinfo *cls)
 999 {
1000         /* XXX this should be done in a faster way. Maybe always make */
1001         /* the classref of index 0 a self reference.                  */
1002         return class_get_classref(cls,cls->name);
1003 }
1004
1005 /* class_get_classref_multiarray_of ********************************************
1006
1007    Returns an array type reference with the given dimension and element class
1008    reference.
1009
1010    IN:
1011        dim..............the requested dimension
1012                             dim must be in [1;255]. This is NOT checked!
1013            ref..............the component class reference
1014
1015    RETURN VALUE:
1016        a pointer to the class reference for the array type
1017
1018    NOTE:
1019        The referer of `ref` is used as the referer for the new classref.
1020
1021 *******************************************************************************/
1022
1023 constant_classref *class_get_classref_multiarray_of(s4 dim, constant_classref *ref)
1024 {
1025     s4 namelen;
1026     char *namebuf;
1027         constant_classref *cr;
1028
1029         assert(ref);
1030         assert(dim >= 1 && dim <= 255);
1031
1032     /* Assemble the array class name */
1033     namelen = ref->name->blength;
1034
1035     if (ref->name->text[0] == '[') {
1036         /* the element is itself an array */
1037         namebuf = MNEW(char, namelen + dim);
1038         memcpy(namebuf + dim, ref->name->text, namelen);
1039         namelen += dim;
1040     }
1041     else {
1042         /* the element is a non-array class */
1043         namebuf = MNEW(char, namelen + 2 + dim);
1044         namebuf[dim] = 'L';
1045         memcpy(namebuf + dim + 1, ref->name->text, namelen);
1046         namelen += (2 + dim);
1047         namebuf[namelen - 1] = ';';
1048     }
1049         memset(namebuf, '[', dim);
1050
1051         utf* u = utf_new(namebuf, namelen);
1052
1053         MFREE(namebuf, char, namelen);
1054
1055     cr = class_get_classref(ref->referer, u);
1056
1057         return cr;
1058 }
1059
1060
1061 /* class_get_classref_component_of *********************************************
1062
1063    Returns the component classref of a given array type reference
1064
1065    IN:
1066        ref..............the array type reference
1067
1068    RETURN VALUE:
1069        a reference to the component class, or
1070            NULL if `ref` is not an object array type reference
1071
1072    NOTE:
1073        The referer of `ref` is used as the referer for the new classref.
1074
1075 *******************************************************************************/
1076
1077 constant_classref *class_get_classref_component_of(constant_classref *ref)
1078 {
1079         s4 namelen;
1080         char *name;
1081
1082         assert(ref);
1083
1084         name = ref->name->text;
1085         if (*name++ != '[')
1086                 return NULL;
1087
1088         namelen = ref->name->blength - 1;
1089         if (*name == 'L') {
1090                 name++;
1091                 namelen -= 2;
1092         }
1093         else if (*name != '[') {
1094                 return NULL;
1095         }
1096
1097     return class_get_classref(ref->referer, utf_new(name, namelen));
1098 }
1099
1100
1101 /* class_findmethod ************************************************************
1102
1103    Searches a 'classinfo' structure for a method having the given name
1104    and descriptor. If descriptor is NULL, it is ignored.
1105
1106 *******************************************************************************/
1107
1108 methodinfo *class_findmethod(classinfo *c, utf *name, utf *desc)
1109 {
1110         methodinfo *m;
1111         s4          i;
1112
1113         for (i = 0; i < c->methodscount; i++) {
1114                 m = &(c->methods[i]);
1115
1116                 if ((m->name == name) && ((desc == NULL) || (m->descriptor == desc)))
1117                         return m;
1118         }
1119
1120         return NULL;
1121 }
1122
1123
1124 /* class_resolvemethod *********************************************************
1125
1126    Searches a class and it's super classes for a method.
1127
1128    Superinterfaces are *not* searched.
1129
1130 *******************************************************************************/
1131
1132 methodinfo *class_resolvemethod(classinfo *c, utf *name, utf *desc)
1133 {
1134         methodinfo *m;
1135
1136         while (c) {
1137                 m = class_findmethod(c, name, desc);
1138
1139                 if (m)
1140                         return m;
1141
1142                 /* JVM Specification bug:
1143
1144                    It is important NOT to resolve special <init> and <clinit>
1145                    methods to super classes or interfaces; yet, this is not
1146                    explicited in the specification.  Section 5.4.3.3 should be
1147                    updated appropriately.  */
1148
1149                 if (name == utf_init || name == utf_clinit)
1150                         return NULL;
1151
1152                 c = c->super;
1153         }
1154
1155         return NULL;
1156 }
1157
1158
1159 /* class_resolveinterfacemethod_intern *****************************************
1160
1161    Internally used helper function. Do not use this directly.
1162
1163 *******************************************************************************/
1164
1165 static methodinfo *class_resolveinterfacemethod_intern(classinfo *c,
1166                                                                                                            utf *name, utf *desc)
1167 {
1168         methodinfo *m;
1169         s4          i;
1170
1171         /* try to find the method in the class */
1172
1173         m = class_findmethod(c, name, desc);
1174
1175         if (m != NULL)
1176                 return m;
1177
1178         /* No method found?  Try the super interfaces. */
1179
1180         for (i = 0; i < c->interfacescount; i++) {
1181                 m = class_resolveinterfacemethod_intern(c->interfaces[i], name, desc);
1182
1183                 if (m != NULL)
1184                         return m;
1185         }
1186
1187         /* no method found */
1188
1189         return NULL;
1190 }
1191
1192
1193 /* class_resolveclassmethod ****************************************************
1194
1195    Resolves a reference from REFERER to a method with NAME and DESC in
1196    class C.
1197
1198    If the method cannot be resolved the return value is NULL. If
1199    EXCEPT is true *exceptionptr is set, too.
1200
1201 *******************************************************************************/
1202
1203 methodinfo *class_resolveclassmethod(classinfo *c, utf *name, utf *desc,
1204                                                                          classinfo *referer, bool throwexception)
1205 {
1206         classinfo  *cls;
1207         methodinfo *m;
1208         s4          i;
1209
1210 /*      if (c->flags & ACC_INTERFACE) { */
1211 /*              if (throwexception) */
1212 /*                      *exceptionptr = */
1213 /*                              new_exception(string_java_lang_IncompatibleClassChangeError); */
1214 /*              return NULL; */
1215 /*      } */
1216
1217         /* try class c and its superclasses */
1218
1219         cls = c;
1220
1221         m = class_resolvemethod(cls, name, desc);
1222
1223         if (m != NULL)
1224                 goto found;
1225
1226         /* Try the super interfaces. */
1227
1228         for (i = 0; i < c->interfacescount; i++) {
1229                 m = class_resolveinterfacemethod_intern(c->interfaces[i], name, desc);
1230
1231                 if (m != NULL)
1232                         goto found;
1233         }
1234
1235         if (throwexception)
1236                 exceptions_throw_nosuchmethoderror(c, name, desc);
1237
1238         return NULL;
1239
1240  found:
1241         if ((m->flags & ACC_ABSTRACT) && !(c->flags & ACC_ABSTRACT)) {
1242                 if (throwexception)
1243                         exceptions_throw_abstractmethoderror();
1244
1245                 return NULL;
1246         }
1247
1248         /* XXX check access rights */
1249
1250         return m;
1251 }
1252
1253
1254 /* class_resolveinterfacemethod ************************************************
1255
1256    Resolves a reference from REFERER to a method with NAME and DESC in
1257    interface C.
1258
1259    If the method cannot be resolved the return value is NULL. If
1260    EXCEPT is true *exceptionptr is set, too.
1261
1262 *******************************************************************************/
1263
1264 methodinfo *class_resolveinterfacemethod(classinfo *c, utf *name, utf *desc,
1265                                                                                  classinfo *referer, bool throwexception)
1266 {
1267         methodinfo *mi;
1268
1269         if (!(c->flags & ACC_INTERFACE)) {
1270                 if (throwexception)
1271                         exceptions_throw_incompatibleclasschangeerror(c, "Not an interface");
1272
1273                 return NULL;
1274         }
1275
1276         mi = class_resolveinterfacemethod_intern(c, name, desc);
1277
1278         if (mi != NULL)
1279                 return mi;
1280
1281         /* try class java.lang.Object */
1282
1283         mi = class_findmethod(class_java_lang_Object, name, desc);
1284
1285         if (mi != NULL)
1286                 return mi;
1287
1288         if (throwexception)
1289                 exceptions_throw_nosuchmethoderror(c, name, desc);
1290
1291         return NULL;
1292 }
1293
1294
1295 /* class_findfield *************************************************************
1296
1297    Searches for field with specified name and type in a classinfo
1298    structure. If no such field is found NULL is returned.
1299
1300 *******************************************************************************/
1301
1302 fieldinfo *class_findfield(classinfo *c, utf *name, utf *desc)
1303 {
1304         s4 i;
1305
1306         for (i = 0; i < c->fieldscount; i++)
1307                 if ((c->fields[i].name == name) && (c->fields[i].descriptor == desc))
1308                         return &(c->fields[i]);
1309
1310         if (c->super != NULL)
1311                 return class_findfield(c->super, name, desc);
1312
1313         return NULL;
1314 }
1315
1316
1317 /* class_findfield_approx ******************************************************
1318
1319    Searches in 'classinfo'-structure for a field with the specified
1320    name.
1321
1322 *******************************************************************************/
1323
1324 fieldinfo *class_findfield_by_name(classinfo* c, utf* name)
1325 {
1326         for (int32_t i = 0; i < c->fieldscount; i++) {
1327                 fieldinfo* f = &(c->fields[i]);
1328
1329                 if (f->name == name)
1330                         return f;
1331         }
1332
1333         // Field not found.
1334         exceptions_throw_nosuchfielderror(c, name);
1335         return NULL;
1336 }
1337
1338
1339 /****************** Function: class_resolvefield_int ***************************
1340
1341     This is an internally used helper function. Do not use this directly.
1342
1343         Tries to resolve a field having the given name and type.
1344     If the field cannot be resolved, NULL is returned.
1345
1346 *******************************************************************************/
1347
1348 static fieldinfo *class_resolvefield_int(classinfo *c, utf *name, utf *desc)
1349 {
1350         fieldinfo *fi;
1351         s4         i;
1352
1353         /* search for field in class c */
1354
1355         for (i = 0; i < c->fieldscount; i++) {
1356                 if ((c->fields[i].name == name) && (c->fields[i].descriptor == desc)) {
1357                         return &(c->fields[i]);
1358                 }
1359     }
1360
1361         /* Try super interfaces recursively. */
1362
1363         for (i = 0; i < c->interfacescount; i++) {
1364                 fi = class_resolvefield_int(c->interfaces[i], name, desc);
1365
1366                 if (fi != NULL)
1367                         return fi;
1368         }
1369
1370         /* Try super class. */
1371
1372         if (c->super != NULL)
1373                 return class_resolvefield_int(c->super, name, desc);
1374
1375         /* not found */
1376
1377         return NULL;
1378 }
1379
1380
1381 /********************* Function: class_resolvefield ***************************
1382
1383         Resolves a reference from REFERER to a field with NAME and DESC in class C.
1384
1385     If the field cannot be resolved, an exception is thrown and the
1386     return value is NULL.
1387
1388 *******************************************************************************/
1389
1390 fieldinfo *class_resolvefield(classinfo *c, utf *name, utf *desc, classinfo *referer)
1391 {
1392         fieldinfo *fi;
1393
1394         fi = class_resolvefield_int(c, name, desc);
1395
1396         if (!fi) {
1397                 exceptions_throw_nosuchfielderror(c, name);
1398                 return NULL;
1399         }
1400
1401         /* XXX check access rights */
1402
1403         return fi;
1404 }
1405
1406
1407 /* class_issubclass ************************************************************
1408
1409    Checks if sub is a descendant of super.
1410
1411 *******************************************************************************/
1412
1413 bool class_issubclass(classinfo *sub, classinfo *super)
1414 {
1415         classinfo *c;
1416
1417         c = sub;
1418
1419         for (;;) {
1420                 /* We reached java/lang/Object and did not find the requested
1421                    super class. */
1422
1423                 if (c == NULL)
1424                         return false;
1425
1426                 /* We found the requested super class. */
1427
1428                 if (c == super)
1429                         return true;
1430
1431                 c = c->super;
1432         }
1433 }
1434
1435
1436 /* class_isanysubclass *********************************************************
1437
1438    Checks a subclass relation between two classes. Implemented
1439    interfaces are interpreted as super classes.
1440
1441    Return value: 1 ... sub is subclass of super
1442                  0 ... otherwise
1443
1444 *******************************************************************************/
1445
1446 bool class_isanysubclass(classinfo *sub, classinfo *super)
1447 {
1448         uint32_t diffval;
1449         bool     result;
1450
1451         /* This is the trivial case. */
1452
1453         if (sub == super)
1454                 return true;
1455
1456         /* Primitive classes are only subclasses of themselves. */
1457
1458         if (class_is_primitive(sub) || class_is_primitive(super))
1459                 return false;
1460
1461         /* Check for interfaces. */
1462
1463         if (super->flags & ACC_INTERFACE) {
1464                 result = (sub->vftbl->interfacetablelength > super->index) &&
1465                         (sub->vftbl->interfacetable[-super->index] != NULL);
1466         }
1467         else {
1468                 /* java.lang.Object is the only super class of any
1469                    interface. */
1470
1471                 if (sub->flags & ACC_INTERFACE)
1472                         return (super == class_java_lang_Object);
1473
1474 #if USES_NEW_SUBTYPE
1475                 result = fast_subtype_check(sub->vftbl, super->vftbl);
1476 #else
1477                 LOCK_CLASSRENUMBER_LOCK;
1478
1479                 diffval = sub->vftbl->baseval - super->vftbl->baseval;
1480                 result  = diffval <= (uint32_t) super->vftbl->diffval;
1481
1482                 UNLOCK_CLASSRENUMBER_LOCK;
1483 #endif
1484         }
1485
1486         return result;
1487 }
1488
1489
1490 /* class_is_assignable_from ****************************************************
1491
1492    Return whether an instance of the "from" class parameter would be
1493    an instance of this class "to" as well.
1494
1495    ARGUMENTS:
1496        to ..... class
1497            from ... class
1498
1499    RETURN:
1500        true .... is assignable
1501            false ... is not assignable
1502
1503 *******************************************************************************/
1504
1505 bool class_is_assignable_from(classinfo *to, classinfo *from)
1506 {
1507         if (!(to->state & CLASS_LINKED))
1508                 if (!link_class(to))
1509                         return false;
1510
1511         if (!(from->state & CLASS_LINKED))
1512                 if (!link_class(from))
1513                         return false;
1514
1515         return class_isanysubclass(from, to);
1516 }
1517
1518
1519 /* class_is_instance ***********************************************************
1520
1521    Return if the given Java object is an instance of the given class.
1522
1523    ARGUMENTS:
1524        c ... class
1525            h ... Java object
1526
1527    RETURN:
1528        true .... is instance
1529            false ... is not instance
1530
1531 *******************************************************************************/
1532
1533 bool class_is_instance(classinfo *c, java_handle_t *h)
1534 {
1535         if (!(c->state & CLASS_LINKED))
1536                 if (!link_class(c))
1537                         return false;
1538
1539         return builtin_instanceof(h, c);
1540 }
1541
1542
1543 /* class_get_componenttype *****************************************************
1544
1545    Return the component class of the given class.  If the given class
1546    is not an array, return NULL.
1547
1548 *******************************************************************************/
1549
1550 classinfo *class_get_componenttype(classinfo *c)
1551 {
1552         classinfo       *component;
1553         arraydescriptor *ad;
1554
1555         /* XXX maybe we could find a way to do this without linking. */
1556         /* This way should be safe and easy, however.                */
1557
1558         if (!(c->state & CLASS_LINKED))
1559                 if (!link_class(c))
1560                         return NULL;
1561
1562         ad = c->vftbl->arraydesc;
1563
1564         if (ad == NULL)
1565                 return NULL;
1566
1567         if (ad->arraytype == ARRAYTYPE_OBJECT)
1568                 component = ad->componentvftbl->clazz;
1569         else
1570                 component = Primitive::get_class_by_type(ad->arraytype);
1571
1572         return component;
1573 }
1574
1575
1576 /* class_get_declaredclasses ***************************************************
1577
1578    Return an array of declared classes of the given class.
1579
1580 *******************************************************************************/
1581
1582 java_handle_objectarray_t *class_get_declaredclasses(classinfo *c, bool publicOnly)
1583 {
1584         classref_or_classinfo  inner;
1585         classref_or_classinfo  outer;
1586         utf                   *outername;
1587         int                    declaredclasscount;  /* number of declared classes */
1588         int                    pos;                     /* current declared class */
1589         int                    i;
1590         classinfo             *ic;
1591
1592         declaredclasscount = 0;
1593
1594         if (!class_is_primitive(c) && !class_is_array(c)) {
1595                 /* Determine number of declared classes. */
1596
1597                 for (i = 0; i < c->innerclasscount; i++) {
1598                         /* Get outer-class.  If the inner-class is not a member
1599                            class, the outer-class is NULL. */
1600
1601                         outer = c->innerclass[i].outer_class;
1602
1603                         if (outer.any == NULL)
1604                                 continue;
1605
1606                         /* Check if outer-class is a classref or a real class and
1607                get the class name from the structure. */
1608
1609                         outername = IS_CLASSREF(outer) ? outer.ref->name : outer.cls->name;
1610
1611                         /* Outer class is this class. */
1612
1613                         if ((outername == c->name) &&
1614                                 ((publicOnly == 0) || (c->innerclass[i].flags & ACC_PUBLIC)))
1615                                 declaredclasscount++;
1616                 }
1617         }
1618
1619         /* Allocate Class[] and check for OOM. */
1620
1621         ClassArray declaredclasses(declaredclasscount);
1622
1623         if (declaredclasses.is_null())
1624                 return NULL;
1625
1626         for (i = 0, pos = 0; i < c->innerclasscount; i++) {
1627                 inner = c->innerclass[i].inner_class;
1628                 outer = c->innerclass[i].outer_class;
1629
1630                 /* Get outer-class.  If the inner-class is not a member class,
1631                    the outer-class is NULL. */
1632
1633                 if (outer.any == NULL)
1634                         continue;
1635
1636                 /* Check if outer_class is a classref or a real class and get
1637                    the class name from the structure. */
1638
1639                 outername = IS_CLASSREF(outer) ? outer.ref->name : outer.cls->name;
1640
1641                 /* Outer class is this class. */
1642
1643                 if ((outername == c->name) &&
1644                         ((publicOnly == 0) || (c->innerclass[i].flags & ACC_PUBLIC))) {
1645
1646                         ic = resolve_classref_or_classinfo_eager(inner, false);
1647
1648                         if (ic == NULL)
1649                                 return NULL;
1650
1651                         if (!(ic->state & CLASS_LINKED))
1652                                 if (!link_class(ic))
1653                                         return NULL;
1654
1655                         declaredclasses.set_element(pos++, ic);
1656                 }
1657         }
1658
1659         return declaredclasses.get_handle();
1660 }
1661
1662
1663 /**
1664  * Return an array of declared constructors of the given class.
1665  *
1666  * @param c          class to get the constructors of
1667  * @param publicOnly show only public fields
1668  *
1669  * @return array of java.lang.reflect.Constructor
1670  */
1671 #if defined(ENABLE_JAVASE)
1672 java_handle_objectarray_t *class_get_declaredconstructors(classinfo *c, bool publicOnly)
1673 {
1674         methodinfo* m;
1675         int         count;
1676         int         index;
1677         int         i;
1678
1679         /* Determine number of constructors. */
1680
1681         count = 0;
1682
1683         for (i = 0; i < c->methodscount; i++) {
1684                 m = &(c->methods[i]);
1685
1686                 if (((m->flags & ACC_PUBLIC) || (publicOnly == 0)) &&
1687                         (m->name == utf_init))
1688                         count++;
1689         }
1690
1691         /* Create array of constructors. */
1692
1693         ObjectArray oa(count, class_java_lang_reflect_Constructor);
1694
1695         if (oa.is_null())
1696                 return NULL;
1697
1698         /* Get the constructors and store them in the array. */
1699
1700         for (i = 0, index = 0; i < c->methodscount; i++) {
1701                 m = &(c->methods[i]);
1702
1703                 if (((m->flags & ACC_PUBLIC) || (publicOnly == 0)) &&
1704                         (m->name == utf_init)) {
1705                         // Create a java.lang.reflect.Constructor object.
1706
1707                         java_lang_reflect_Constructor rc(m);
1708
1709                         /* Store object into array. */
1710
1711                         oa.set_element(index, rc.get_handle());
1712                         index++;
1713                 }
1714         }
1715
1716         return oa.get_handle();
1717 }
1718 #endif
1719
1720
1721 /* class_get_declaredfields ****************************************************
1722
1723    Return an array of declared fields of the given class.
1724
1725    ARGUMENTS:
1726        c ............ class to get the fields of
1727            publicOnly ... show only public fields
1728
1729    RETURN:
1730        array of java.lang.reflect.Field
1731
1732 *******************************************************************************/
1733
1734 #if defined(ENABLE_JAVASE)
1735 java_handle_objectarray_t *class_get_declaredfields(classinfo *c, bool publicOnly)
1736 {
1737         fieldinfo* f;
1738         int        count;
1739         int        index;
1740         int        i;
1741
1742         /* Determine number of fields. */
1743
1744         count = 0;
1745
1746         for (i = 0; i < c->fieldscount; i++)
1747                 if ((c->fields[i].flags & ACC_PUBLIC) || (publicOnly == 0))
1748                         count++;
1749
1750         /* Create array of fields. */
1751
1752         ObjectArray oa(count, class_java_lang_reflect_Field);
1753
1754         if (oa.is_null())
1755                 return NULL;
1756
1757         /* Get the fields and store them in the array. */
1758
1759         for (i = 0, index = 0; i < c->fieldscount; i++) {
1760                 f = &(c->fields[i]);
1761
1762                 if ((f->flags & ACC_PUBLIC) || (publicOnly == 0)) {
1763                         // Create a java.lang.reflect.Field object.
1764
1765                         java_lang_reflect_Field rf(f);
1766
1767                         /* Store object into array. */
1768
1769                         oa.set_element(index, rf.get_handle());
1770                         index++;
1771                 }
1772         }
1773
1774         return oa.get_handle();
1775 }
1776 #endif
1777
1778
1779 /* class_get_declaredmethods ***************************************************
1780
1781    Return an array of declared methods of the given class.
1782
1783    ARGUMENTS:
1784        c ............ class to get the methods of
1785            publicOnly ... show only public methods
1786
1787    RETURN:
1788        array of java.lang.reflect.Method
1789
1790 *******************************************************************************/
1791
1792 #if defined(ENABLE_JAVASE)
1793 java_handle_objectarray_t *class_get_declaredmethods(classinfo *c, bool publicOnly)
1794 {
1795         methodinfo* m;     /* the current method to be represented */
1796         int         count;
1797         int         index;
1798         int         i;
1799
1800         /* JOWENN: array classes do not declare methods according to mauve
1801            test.  It should be considered, if we should return to my old
1802            clone method overriding instead of declaring it as a member
1803            function. */
1804
1805         if (class_is_array(c)) {
1806                 ObjectArray oa(0, class_java_lang_reflect_Method);
1807                 return oa.get_handle();
1808         }
1809
1810         /* Determine number of methods. */
1811
1812         count = 0;
1813
1814         for (i = 0; i < c->methodscount; i++) {
1815                 m = &(c->methods[i]);
1816
1817                 if (((m->flags & ACC_PUBLIC) || (publicOnly == false)) &&
1818                         ((m->name != utf_init) && (m->name != utf_clinit)) &&
1819                         !(m->flags & ACC_MIRANDA))
1820                         count++;
1821         }
1822
1823         /* Create array of methods. */
1824
1825         ObjectArray oa(count, class_java_lang_reflect_Method);
1826
1827         if (oa.is_null())
1828                 return NULL;
1829
1830         /* Get the methods and store them in the array. */
1831
1832         for (i = 0, index = 0; i < c->methodscount; i++) {
1833                 m = &(c->methods[i]);
1834
1835                 if (((m->flags & ACC_PUBLIC) || (publicOnly == false)) &&
1836                         ((m->name != utf_init) && (m->name != utf_clinit)) &&
1837                         !(m->flags & ACC_MIRANDA)) {
1838                         // Create java.lang.reflect.Method object.
1839
1840                         java_lang_reflect_Method rm(m);
1841
1842                         /* Store object into array. */
1843
1844                         oa.set_element(index, rm.get_handle());
1845                         index++;
1846                 }
1847         }
1848
1849         return oa.get_handle();
1850 }
1851 #endif
1852
1853
1854 /* class_get_declaringclass ****************************************************
1855
1856    If the class or interface given is a member of another class,
1857    return the declaring class.  For array and primitive classes return
1858    NULL.
1859
1860 *******************************************************************************/
1861
1862 classinfo *class_get_declaringclass(classinfo *c)
1863 {
1864         classref_or_classinfo  cr;
1865         classinfo             *dc;
1866
1867         /* Get declaring class. */
1868
1869         cr = c->declaringclass;
1870
1871         if (cr.any == NULL)
1872                 return NULL;
1873
1874         /* Resolve the class if necessary. */
1875
1876         if (IS_CLASSREF(cr)) {
1877 /*              dc = resolve_classref_eager(cr.ref); */
1878                 dc = resolve_classref_or_classinfo_eager(cr, true);
1879
1880                 if (dc == NULL)
1881                         return NULL;
1882
1883                 /* Store the resolved class in the class structure. */
1884
1885                 cr.cls = dc;
1886         }
1887
1888         dc = cr.cls;
1889
1890         return dc;
1891 }
1892
1893
1894 /* class_get_enclosingclass ****************************************************
1895
1896    Return the enclosing class for the given class.
1897
1898 *******************************************************************************/
1899
1900 classinfo *class_get_enclosingclass(classinfo *c)
1901 {
1902         classref_or_classinfo  cr;
1903         classinfo             *ec;
1904
1905         /* Get enclosing class. */
1906
1907         cr = c->enclosingclass;
1908
1909         if (cr.any == NULL)
1910                 return NULL;
1911
1912         /* Resolve the class if necessary. */
1913
1914         if (IS_CLASSREF(cr)) {
1915 /*              ec = resolve_classref_eager(cr.ref); */
1916                 ec = resolve_classref_or_classinfo_eager(cr, true);
1917
1918                 if (ec == NULL)
1919                         return NULL;
1920
1921                 /* Store the resolved class in the class structure. */
1922
1923                 cr.cls = ec;
1924         }
1925
1926         ec = cr.cls;
1927
1928         return ec;
1929 }
1930
1931
1932 /**
1933  * Return the enclosing constructor as java.lang.reflect.Constructor
1934  * object for the given class.
1935  *
1936  * @param c class to return the enclosing constructor for
1937  *
1938  * @return java.lang.reflect.Constructor object of the enclosing
1939  * constructor
1940  */
1941 #if defined(ENABLE_JAVASE)
1942 java_handle_t* class_get_enclosingconstructor(classinfo *c)
1943 {
1944         methodinfo*    m;
1945
1946         m = class_get_enclosingmethod_raw(c);
1947
1948         if (m == NULL)
1949                 return NULL;
1950
1951         /* Check for <init>. */
1952
1953         if (m->name != utf_init)
1954                 return NULL;
1955
1956         // Create a java.lang.reflect.Constructor object.
1957
1958         java_lang_reflect_Constructor rc(m);
1959
1960         return rc.get_handle();
1961 }
1962 #endif
1963
1964
1965 /* class_get_enclosingmethod ***************************************************
1966
1967    Return the enclosing method for the given class.
1968
1969    IN:
1970        c ... class to return the enclosing method for
1971
1972    RETURN:
1973        methodinfo of the enclosing method
1974
1975 *******************************************************************************/
1976
1977 methodinfo *class_get_enclosingmethod_raw(classinfo *c)
1978 {
1979         constant_nameandtype *cn;
1980         classinfo            *ec;
1981         methodinfo           *m;
1982
1983         /* get enclosing class and method */
1984
1985         ec = class_get_enclosingclass(c);
1986         cn = c->enclosingmethod;
1987
1988         /* check for enclosing class and method */
1989
1990         if (ec == NULL)
1991                 return NULL;
1992
1993         if (cn == NULL)
1994                 return NULL;
1995
1996         /* find method in enclosing class */
1997
1998         m = class_findmethod(ec, cn->name, cn->descriptor);
1999
2000         if (m == NULL) {
2001                 exceptions_throw_internalerror("Enclosing method doesn't exist");
2002                 return NULL;
2003         }
2004
2005         return m;
2006 }
2007
2008
2009 /**
2010  * Return the enclosing method as java.lang.reflect.Method object for
2011  * the given class.
2012  *
2013  * @param c class to return the enclosing method for
2014  *
2015  * @return java.lang.reflect.Method object of the enclosing method
2016  */
2017 #if defined(ENABLE_JAVASE)
2018 java_handle_t* class_get_enclosingmethod(classinfo *c)
2019 {
2020         methodinfo*    m;
2021
2022         m = class_get_enclosingmethod_raw(c);
2023
2024         if (m == NULL)
2025                 return NULL;
2026
2027         /* check for <init> */
2028
2029         if (m->name == utf_init)
2030                 return NULL;
2031
2032         // Create a java.lang.reflect.Method object.
2033
2034         java_lang_reflect_Method rm(m);
2035
2036         return rm.get_handle();
2037 }
2038 #endif
2039
2040
2041 /* class_get_interfaces ********************************************************
2042
2043    Return an array of interfaces of the given class.
2044
2045 *******************************************************************************/
2046
2047 java_handle_objectarray_t* class_get_interfaces(classinfo *c)
2048 {
2049         classinfo* ic;
2050         u4         i;
2051
2052         if (!(c->state & CLASS_LINKED))
2053                 if (!link_class(c))
2054                         return NULL;
2055
2056         ClassArray interfaces(c->interfacescount);
2057
2058         if (interfaces.is_null())
2059                 return NULL;
2060
2061         for (i = 0; i < c->interfacescount; i++) {
2062                 ic = c->interfaces[i];
2063
2064                 interfaces.set_element(i, ic);
2065         }
2066
2067         return interfaces.get_handle();
2068 }
2069
2070
2071 /* class_get_annotations *******************************************************
2072
2073    Get the unparsed declared annotations in a byte array
2074    of the given class.
2075
2076    IN:
2077        c........the class of which the annotations should be returned
2078
2079    RETURN VALUE:
2080        The unparsed declared annotations in a byte array
2081        (or NULL if there aren't any).
2082
2083 *******************************************************************************/
2084
2085 java_handle_bytearray_t *class_get_annotations(classinfo *c)
2086 {
2087 #if defined(ENABLE_ANNOTATIONS)
2088         java_handle_t *annotations; /* unparsed annotations */
2089
2090         LLNI_classinfo_field_get(c, annotations, annotations);
2091
2092         return (java_handle_bytearray_t*) annotations;
2093 #else
2094         return NULL;
2095 #endif
2096 }
2097
2098
2099 /* class_get_modifiers *********************************************************
2100
2101    Get the modifier flags of the given class.
2102
2103    IN:
2104        c....the class of which the modifier flags should be returned
2105            ignoreInnerClassesAttrib
2106    RETURN VALUE:
2107        modifier flags
2108
2109 *******************************************************************************/
2110
2111 int32_t class_get_modifiers(classinfo *c, bool ignoreInnerClassesAttrib)
2112 {
2113         classref_or_classinfo  inner;
2114         classref_or_classinfo  outer;
2115         utf                   *innername;
2116         int                    i;
2117         int32_t                flags;
2118
2119         /* default to flags of passed class */
2120
2121         flags = c->flags;
2122
2123         /* if requested we check if passed class is inner class */
2124
2125         if (!ignoreInnerClassesAttrib && (c->innerclasscount != 0)) {
2126                 /* search for passed class as inner class */
2127
2128                 for (i = 0; i < c->innerclasscount; i++) {
2129                         inner = c->innerclass[i].inner_class;
2130                         outer = c->innerclass[i].outer_class;
2131
2132                         /* Check if inner is a classref or a real class and get
2133                the name of the structure */
2134
2135                         innername = IS_CLASSREF(inner) ? inner.ref->name : inner.cls->name;
2136
2137                         /* innerclass is this class */
2138
2139                         if (innername == c->name) {
2140                                 /* has the class actually an outer class? */
2141
2142                                 if (outer.any)
2143                                         /* return flags got from the outer class file */
2144                                         flags = c->innerclass[i].flags;
2145
2146                                 break;
2147                         }
2148                 }
2149         }
2150
2151         /* remove ACC_SUPER bit from flags */
2152
2153         return flags & ~ACC_SUPER & ACC_CLASS_REFLECT_MASK;
2154 }
2155
2156
2157 /* class_get_signature *********************************************************
2158
2159    Return the signature of the given class.  For array and primitive
2160    classes return NULL.
2161
2162 *******************************************************************************/
2163
2164 #if defined(ENABLE_JAVASE)
2165 utf *class_get_signature(classinfo *c)
2166 {
2167         /* For array and primitive classes return NULL. */
2168
2169         if (class_is_array(c) || class_is_primitive(c))
2170                 return NULL;
2171
2172         return c->signature;
2173 }
2174 #endif
2175
2176
2177 /* class_printflags ************************************************************
2178
2179    Prints flags of a class.
2180
2181 *******************************************************************************/
2182
2183 #if !defined(NDEBUG)
2184 void class_printflags(classinfo *c)
2185 {
2186         if (c == NULL) {
2187                 printf("NULL");
2188                 return;
2189         }
2190
2191         if (c->flags & ACC_PUBLIC)       printf(" PUBLIC");
2192         if (c->flags & ACC_PRIVATE)      printf(" PRIVATE");
2193         if (c->flags & ACC_PROTECTED)    printf(" PROTECTED");
2194         if (c->flags & ACC_STATIC)       printf(" STATIC");
2195         if (c->flags & ACC_FINAL)        printf(" FINAL");
2196         if (c->flags & ACC_SYNCHRONIZED) printf(" SYNCHRONIZED");
2197         if (c->flags & ACC_VOLATILE)     printf(" VOLATILE");
2198         if (c->flags & ACC_TRANSIENT)    printf(" TRANSIENT");
2199         if (c->flags & ACC_NATIVE)       printf(" NATIVE");
2200         if (c->flags & ACC_INTERFACE)    printf(" INTERFACE");
2201         if (c->flags & ACC_ABSTRACT)     printf(" ABSTRACT");
2202 }
2203 #endif
2204
2205
2206 /* class_print *****************************************************************
2207
2208    Prints classname plus flags.
2209
2210 *******************************************************************************/
2211
2212 #if !defined(NDEBUG)
2213 void class_print(classinfo *c)
2214 {
2215         if (c == NULL) {
2216                 printf("NULL");
2217                 return;
2218         }
2219
2220         utf_display_printable_ascii(c->name);
2221         class_printflags(c);
2222 }
2223 #endif
2224
2225
2226 /* class_classref_print ********************************************************
2227
2228    Prints classname plus referer class.
2229
2230 *******************************************************************************/
2231
2232 #if !defined(NDEBUG)
2233 void class_classref_print(constant_classref *cr)
2234 {
2235         if (cr == NULL) {
2236                 printf("NULL");
2237                 return;
2238         }
2239
2240         utf_display_printable_ascii(cr->name);
2241         printf("(ref.by ");
2242         if (cr->referer)
2243                 class_print(cr->referer);
2244         else
2245                 printf("NULL");
2246         printf(")");
2247 }
2248 #endif
2249
2250
2251 /* class_println ***************************************************************
2252
2253    Prints classname plus flags and new line.
2254
2255 *******************************************************************************/
2256
2257 #if !defined(NDEBUG)
2258 void class_println(classinfo *c)
2259 {
2260         class_print(c);
2261         printf("\n");
2262 }
2263 #endif
2264
2265
2266 /* class_classref_println ******************************************************
2267
2268    Prints classname plus referer class and new line.
2269
2270 *******************************************************************************/
2271
2272 #if !defined(NDEBUG)
2273 void class_classref_println(constant_classref *cr)
2274 {
2275         class_classref_print(cr);
2276         printf("\n");
2277 }
2278 #endif
2279
2280
2281 /* class_classref_or_classinfo_print *******************************************
2282
2283    Prints classname plus referer class.
2284
2285 *******************************************************************************/
2286
2287 #if !defined(NDEBUG)
2288 void class_classref_or_classinfo_print(classref_or_classinfo c)
2289 {
2290         if (c.any == NULL) {
2291                 printf("(classref_or_classinfo) NULL");
2292                 return;
2293         }
2294         if (IS_CLASSREF(c))
2295                 class_classref_print(c.ref);
2296         else
2297                 class_print(c.cls);
2298 }
2299 #endif
2300
2301
2302 /* class_classref_or_classinfo_println *****************************************
2303
2304    Prints classname plus referer class and a newline.
2305
2306 *******************************************************************************/
2307
2308 #if !defined(NDEBUG)
2309 void class_classref_or_classinfo_println(classref_or_classinfo c)
2310 {
2311         class_classref_or_classinfo_print(c);
2312         printf("\n");
2313 }
2314 #endif
2315
2316
2317 /* class_showconstantpool ******************************************************
2318
2319    Dump the constant pool of the given class to stdout.
2320
2321 *******************************************************************************/
2322
2323 #if !defined(NDEBUG)
2324 void class_showconstantpool (classinfo *c)
2325 {
2326         u4 i;
2327         void* e;
2328
2329         printf ("---- dump of constant pool ----\n");
2330
2331         for (i=0; i<c->cpcount; i++) {
2332                 printf ("#%d:  ", (int) i);
2333
2334                 e = c -> cpinfos [i];
2335                 if (e) {
2336
2337                         switch (c -> cptags [i]) {
2338                         case CONSTANT_Class:
2339                                 printf ("Classreference -> ");
2340                                 utf_display_printable_ascii ( ((constant_classref*)e) -> name );
2341                                 break;
2342                         case CONSTANT_Fieldref:
2343                                 printf ("Fieldref -> ");
2344                                 field_fieldref_print((constant_FMIref *) e);
2345                                 break;
2346                         case CONSTANT_Methodref:
2347                                 printf ("Methodref -> ");
2348                                 method_methodref_print((constant_FMIref *) e);
2349                                 break;
2350                         case CONSTANT_InterfaceMethodref:
2351                                 printf ("InterfaceMethod -> ");
2352                                 method_methodref_print((constant_FMIref *) e);
2353                                 break;
2354                         case CONSTANT_String:
2355                                 printf ("String -> ");
2356                                 utf_display_printable_ascii ((utf*) e);
2357                                 break;
2358                         case CONSTANT_Integer:
2359                                 printf ("Integer -> %d", (int) ( ((constant_integer*)e) -> value) );
2360                                 break;
2361                         case CONSTANT_Float:
2362                                 printf ("Float -> %f", ((constant_float*)e) -> value);
2363                                 break;
2364                         case CONSTANT_Double:
2365                                 printf ("Double -> %f", ((constant_double*)e) -> value);
2366                                 break;
2367                         case CONSTANT_Long:
2368                                 printf ("Long -> %ld", (long int) ((constant_long*)e) -> value);
2369                                 break;
2370                         case CONSTANT_NameAndType:
2371                                 {
2372                                         constant_nameandtype *cnt = (constant_nameandtype *) e;
2373                                         printf ("NameAndType: ");
2374                                         utf_display_printable_ascii (cnt->name);
2375                                         printf (" ");
2376                                         utf_display_printable_ascii (cnt->descriptor);
2377                                 }
2378                                 break;
2379                         case CONSTANT_Utf8:
2380                                 printf ("Utf8 -> ");
2381                                 utf_display_printable_ascii ((utf*) e);
2382                                 break;
2383                         default:
2384                                 log_text("Invalid type of ConstantPool-Entry");
2385                                 assert(0);
2386                         }
2387                 }
2388
2389                 printf ("\n");
2390         }
2391 }
2392 #endif /* !defined(NDEBUG) */
2393
2394
2395 /* class_showmethods ***********************************************************
2396
2397    Dump info about the fields and methods of the given class to stdout.
2398
2399 *******************************************************************************/
2400
2401 #if !defined(NDEBUG)
2402 void class_showmethods (classinfo *c)
2403 {
2404         s4 i;
2405
2406         printf("--------- Fields and Methods ----------------\n");
2407         printf("Flags: ");
2408         class_printflags(c);
2409         printf("\n");
2410
2411         printf("This: ");
2412         utf_display_printable_ascii(c->name);
2413         printf("\n");
2414
2415         if (c->super) {
2416                 printf("Super: ");
2417                 utf_display_printable_ascii(c->super->name);
2418                 printf ("\n");
2419         }
2420
2421         printf("Index: %d\n", c->index);
2422
2423         printf("Interfaces:\n");
2424         for (i = 0; i < c->interfacescount; i++) {
2425                 printf("   ");
2426                 utf_display_printable_ascii(c->interfaces[i]->name);
2427                 printf (" (%d)\n", c->interfaces[i]->index);
2428         }
2429
2430         printf("Fields:\n");
2431         for (i = 0; i < c->fieldscount; i++)
2432                 field_println(&(c->fields[i]));
2433
2434         printf("Methods:\n");
2435         for (i = 0; i < c->methodscount; i++) {
2436                 methodinfo *m = &(c->methods[i]);
2437
2438                 if (!(m->flags & ACC_STATIC))
2439                         printf("vftblindex: %d   ", m->vftblindex);
2440
2441                 method_println(m);
2442         }
2443
2444         printf ("Virtual function table:\n");
2445         for (i = 0; i < c->vftbl->vftbllength; i++)
2446                 printf ("entry: %d,  %ld\n", i, (long int) (c->vftbl->table[i]));
2447 }
2448 #endif /* !defined(NDEBUG) */
2449
2450
2451 /*
2452  * These are local overrides for various environment variables in Emacs.
2453  * Please do not remove this and leave it at the end of the file, where
2454  * Emacs will automagically detect them.
2455  * ---------------------------------------------------------------------
2456  * Local variables:
2457  * mode: c
2458  * indent-tabs-mode: t
2459  * c-basic-offset: 4
2460  * tab-width: 4
2461  * End:
2462  * vim:noexpandtab:sw=4:ts=4:
2463  */