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.h"
  38
  39 #include "native/llni.h"
  40
  41 #include "threads/lock.hpp"
  42 #include "threads/mutex.hpp"
  43
  44 #include "toolbox/logging.h"
  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                 result = fast_subtype_check(sub->vftbl, super->vftbl);
1475         }
1476
1477         return result;
1478 }
1479
1480
1481 /* class_is_assignable_from ****************************************************
1482
1483    Return whether an instance of the "from" class parameter would be
1484    an instance of this class "to" as well.
1485
1486    ARGUMENTS:
1487        to ..... class
1488            from ... class
1489
1490    RETURN:
1491        true .... is assignable
1492            false ... is not assignable
1493
1494 *******************************************************************************/
1495
1496 bool class_is_assignable_from(classinfo *to, classinfo *from)
1497 {
1498         if (!(to->state & CLASS_LINKED))
1499                 if (!link_class(to))
1500                         return false;
1501
1502         if (!(from->state & CLASS_LINKED))
1503                 if (!link_class(from))
1504                         return false;
1505
1506         return class_isanysubclass(from, to);
1507 }
1508
1509
1510 /* class_is_instance ***********************************************************
1511
1512    Return if the given Java object is an instance of the given class.
1513
1514    ARGUMENTS:
1515        c ... class
1516            h ... Java object
1517
1518    RETURN:
1519        true .... is instance
1520            false ... is not instance
1521
1522 *******************************************************************************/
1523
1524 bool class_is_instance(classinfo *c, java_handle_t *h)
1525 {
1526         if (!(c->state & CLASS_LINKED))
1527                 if (!link_class(c))
1528                         return false;
1529
1530         return builtin_instanceof(h, c);
1531 }
1532
1533
1534 /* class_get_componenttype *****************************************************
1535
1536    Return the component class of the given class.  If the given class
1537    is not an array, return NULL.
1538
1539 *******************************************************************************/
1540
1541 classinfo *class_get_componenttype(classinfo *c)
1542 {
1543         classinfo       *component;
1544         arraydescriptor *ad;
1545
1546         /* XXX maybe we could find a way to do this without linking. */
1547         /* This way should be safe and easy, however.                */
1548
1549         if (!(c->state & CLASS_LINKED))
1550                 if (!link_class(c))
1551                         return NULL;
1552
1553         ad = c->vftbl->arraydesc;
1554
1555         if (ad == NULL)
1556                 return NULL;
1557
1558         if (ad->arraytype == ARRAYTYPE_OBJECT)
1559                 component = ad->componentvftbl->clazz;
1560         else
1561                 component = Primitive::get_class_by_type(ad->arraytype);
1562
1563         return component;
1564 }
1565
1566
1567 /* class_get_declaredclasses ***************************************************
1568
1569    Return an array of declared classes of the given class.
1570
1571 *******************************************************************************/
1572
1573 java_handle_objectarray_t *class_get_declaredclasses(classinfo *c, bool publicOnly)
1574 {
1575         classref_or_classinfo  inner;
1576         classref_or_classinfo  outer;
1577         utf                   *outername;
1578         int                    declaredclasscount;  /* number of declared classes */
1579         int                    pos;                     /* current declared class */
1580         java_handle_objectarray_t *oa;               /* array of declared classes */
1581         int                    i;
1582         classinfo             *ic;
1583
1584         declaredclasscount = 0;
1585
1586         if (!class_is_primitive(c) && !class_is_array(c)) {
1587                 /* Determine number of declared classes. */
1588
1589                 for (i = 0; i < c->innerclasscount; i++) {
1590                         /* Get outer-class.  If the inner-class is not a member
1591                            class, the outer-class is NULL. */
1592
1593                         outer = c->innerclass[i].outer_class;
1594
1595                         if (outer.any == NULL)
1596                                 continue;
1597
1598                         /* Check if outer-class is a classref or a real class and
1599                get the class name from the structure. */
1600
1601                         outername = IS_CLASSREF(outer) ? outer.ref->name : outer.cls->name;
1602
1603                         /* Outer class is this class. */
1604
1605                         if ((outername == c->name) &&
1606                                 ((publicOnly == 0) || (c->innerclass[i].flags & ACC_PUBLIC)))
1607                                 declaredclasscount++;
1608                 }
1609         }
1610
1611         /* Allocate Class[] and check for OOM. */
1612
1613         oa = builtin_anewarray(declaredclasscount, class_java_lang_Class);
1614
1615         if (oa == NULL)
1616                 return NULL;
1617
1618         for (i = 0, pos = 0; i < c->innerclasscount; i++) {
1619                 inner = c->innerclass[i].inner_class;
1620                 outer = c->innerclass[i].outer_class;
1621
1622                 /* Get outer-class.  If the inner-class is not a member class,
1623                    the outer-class is NULL. */
1624
1625                 if (outer.any == NULL)
1626                         continue;
1627
1628                 /* Check if outer_class is a classref or a real class and get
1629                    the class name from the structure. */
1630
1631                 outername = IS_CLASSREF(outer) ? outer.ref->name : outer.cls->name;
1632
1633                 /* Outer class is this class. */
1634
1635                 if ((outername == c->name) &&
1636                         ((publicOnly == 0) || (c->innerclass[i].flags & ACC_PUBLIC))) {
1637
1638                         ic = resolve_classref_or_classinfo_eager(inner, false);
1639
1640                         if (ic == NULL)
1641                                 return NULL;
1642
1643                         if (!(ic->state & CLASS_LINKED))
1644                                 if (!link_class(ic))
1645                                         return NULL;
1646
1647                         LLNI_array_direct(oa, pos++) = (java_object_t *) ic;
1648                 }
1649         }
1650
1651         return oa;
1652 }
1653
1654
1655 /**
1656  * Return an array of declared constructors of the given class.
1657  *
1658  * @param c          class to get the constructors of
1659  * @param publicOnly show only public fields
1660  *
1661  * @return array of java.lang.reflect.Constructor
1662  */
1663 #if defined(ENABLE_JAVASE)
1664 java_handle_objectarray_t *class_get_declaredconstructors(classinfo *c, bool publicOnly)
1665 {
1666         methodinfo*                m;
1667         java_handle_objectarray_t* oa;
1668         int                        count;
1669         int                        index;
1670         int                        i;
1671
1672         /* Determine number of constructors. */
1673
1674         count = 0;
1675
1676         for (i = 0; i < c->methodscount; i++) {
1677                 m = &(c->methods[i]);
1678
1679                 if (((m->flags & ACC_PUBLIC) || (publicOnly == 0)) &&
1680                         (m->name == utf_init))
1681                         count++;
1682         }
1683
1684         /* Create array of constructors. */
1685
1686         oa = builtin_anewarray(count, class_java_lang_reflect_Constructor);
1687
1688         if (oa == NULL)
1689                 return NULL;
1690
1691         /* Get the constructors and store them in the array. */
1692
1693         for (i = 0, index = 0; i < c->methodscount; i++) {
1694                 m = &(c->methods[i]);
1695
1696                 if (((m->flags & ACC_PUBLIC) || (publicOnly == 0)) &&
1697                         (m->name == utf_init)) {
1698                         // Create a java.lang.reflect.Constructor object.
1699
1700                         java_lang_reflect_Constructor rc(m);
1701
1702                         /* Store object into array. */
1703
1704                         array_objectarray_element_set(oa, index, rc.get_handle());
1705                         index++;
1706                 }
1707         }
1708
1709         return oa;
1710 }
1711 #endif
1712
1713
1714 /* class_get_declaredfields ****************************************************
1715
1716    Return an array of declared fields of the given class.
1717
1718    ARGUMENTS:
1719        c ............ class to get the fields of
1720            publicOnly ... show only public fields
1721
1722    RETURN:
1723        array of java.lang.reflect.Field
1724
1725 *******************************************************************************/
1726
1727 #if defined(ENABLE_JAVASE)
1728 java_handle_objectarray_t *class_get_declaredfields(classinfo *c, bool publicOnly)
1729 {
1730         java_handle_objectarray_t *oa;
1731         fieldinfo                 *f;
1732         int                        count;
1733         int                        index;
1734         int                        i;
1735
1736         /* Determine number of fields. */
1737
1738         count = 0;
1739
1740         for (i = 0; i < c->fieldscount; i++)
1741                 if ((c->fields[i].flags & ACC_PUBLIC) || (publicOnly == 0))
1742                         count++;
1743
1744         /* Create array of fields. */
1745
1746         oa = builtin_anewarray(count, class_java_lang_reflect_Field);
1747
1748         if (oa == NULL)
1749                 return NULL;
1750
1751         /* Get the fields and store them in the array. */
1752
1753         for (i = 0, index = 0; i < c->fieldscount; i++) {
1754                 f = &(c->fields[i]);
1755
1756                 if ((f->flags & ACC_PUBLIC) || (publicOnly == 0)) {
1757                         // Create a java.lang.reflect.Field object.
1758
1759                         java_lang_reflect_Field rf(f);
1760
1761                         /* Store object into array. */
1762
1763                         array_objectarray_element_set(oa, index, rf.get_handle());
1764                         index++;
1765                 }
1766         }
1767
1768         return oa;
1769 }
1770 #endif
1771
1772
1773 /* class_get_declaredmethods ***************************************************
1774
1775    Return an array of declared methods of the given class.
1776
1777    ARGUMENTS:
1778        c ............ class to get the methods of
1779            publicOnly ... show only public methods
1780
1781    RETURN:
1782        array of java.lang.reflect.Method
1783
1784 *******************************************************************************/
1785
1786 #if defined(ENABLE_JAVASE)
1787 java_handle_objectarray_t *class_get_declaredmethods(classinfo *c, bool publicOnly)
1788 {
1789         java_handle_objectarray_t *oa;         /* result: array of Method-objects */
1790         methodinfo                *m;     /* the current method to be represented */
1791         int                        count;
1792         int                        index;
1793         int                        i;
1794
1795         /* JOWENN: array classes do not declare methods according to mauve
1796            test.  It should be considered, if we should return to my old
1797            clone method overriding instead of declaring it as a member
1798            function. */
1799
1800         if (class_is_array(c))
1801                 return builtin_anewarray(0, class_java_lang_reflect_Method);
1802
1803         /* Determine number of methods. */
1804
1805         count = 0;
1806
1807         for (i = 0; i < c->methodscount; i++) {
1808                 m = &(c->methods[i]);
1809
1810                 if (((m->flags & ACC_PUBLIC) || (publicOnly == false)) &&
1811                         ((m->name != utf_init) && (m->name != utf_clinit)) &&
1812                         !(m->flags & ACC_MIRANDA))
1813                         count++;
1814         }
1815
1816         /* Create array of methods. */
1817
1818         oa = builtin_anewarray(count, class_java_lang_reflect_Method);
1819
1820         if (oa == NULL)
1821                 return NULL;
1822
1823         /* Get the methods and store them in the array. */
1824
1825         for (i = 0, index = 0; i < c->methodscount; i++) {
1826                 m = &(c->methods[i]);
1827
1828                 if (((m->flags & ACC_PUBLIC) || (publicOnly == false)) &&
1829                         ((m->name != utf_init) && (m->name != utf_clinit)) &&
1830                         !(m->flags & ACC_MIRANDA)) {
1831                         // Create java.lang.reflect.Method object.
1832
1833                         java_lang_reflect_Method rm(m);
1834
1835                         /* Store object into array. */
1836
1837                         array_objectarray_element_set(oa, index, rm.get_handle());
1838                         index++;
1839                 }
1840         }
1841
1842         return oa;
1843 }
1844 #endif
1845
1846
1847 /* class_get_declaringclass ****************************************************
1848
1849    If the class or interface given is a member of another class,
1850    return the declaring class.  For array and primitive classes return
1851    NULL.
1852
1853 *******************************************************************************/
1854
1855 classinfo *class_get_declaringclass(classinfo *c)
1856 {
1857         classref_or_classinfo  cr;
1858         classinfo             *dc;
1859
1860         /* Get declaring class. */
1861
1862         cr = c->declaringclass;
1863
1864         if (cr.any == NULL)
1865                 return NULL;
1866
1867         /* Resolve the class if necessary. */
1868
1869         if (IS_CLASSREF(cr)) {
1870 /*              dc = resolve_classref_eager(cr.ref); */
1871                 dc = resolve_classref_or_classinfo_eager(cr, true);
1872
1873                 if (dc == NULL)
1874                         return NULL;
1875
1876                 /* Store the resolved class in the class structure. */
1877
1878                 cr.cls = dc;
1879         }
1880
1881         dc = cr.cls;
1882
1883         return dc;
1884 }
1885
1886
1887 /* class_get_enclosingclass ****************************************************
1888
1889    Return the enclosing class for the given class.
1890
1891 *******************************************************************************/
1892
1893 classinfo *class_get_enclosingclass(classinfo *c)
1894 {
1895         classref_or_classinfo  cr;
1896         classinfo             *ec;
1897
1898         /* Get enclosing class. */
1899
1900         cr = c->enclosingclass;
1901
1902         if (cr.any == NULL)
1903                 return NULL;
1904
1905         /* Resolve the class if necessary. */
1906
1907         if (IS_CLASSREF(cr)) {
1908 /*              ec = resolve_classref_eager(cr.ref); */
1909                 ec = resolve_classref_or_classinfo_eager(cr, true);
1910
1911                 if (ec == NULL)
1912                         return NULL;
1913
1914                 /* Store the resolved class in the class structure. */
1915
1916                 cr.cls = ec;
1917         }
1918
1919         ec = cr.cls;
1920
1921         return ec;
1922 }
1923
1924
1925 /**
1926  * Return the enclosing constructor as java.lang.reflect.Constructor
1927  * object for the given class.
1928  *
1929  * @param c class to return the enclosing constructor for
1930  *
1931  * @return java.lang.reflect.Constructor object of the enclosing
1932  * constructor
1933  */
1934 #if defined(ENABLE_JAVASE)
1935 java_handle_t* class_get_enclosingconstructor(classinfo *c)
1936 {
1937         methodinfo*    m;
1938
1939         m = class_get_enclosingmethod_raw(c);
1940
1941         if (m == NULL)
1942                 return NULL;
1943
1944         /* Check for <init>. */
1945
1946         if (m->name != utf_init)
1947                 return NULL;
1948
1949         // Create a java.lang.reflect.Constructor object.
1950
1951         java_lang_reflect_Constructor rc(m);
1952
1953         return rc.get_handle();
1954 }
1955 #endif
1956
1957
1958 /* class_get_enclosingmethod ***************************************************
1959
1960    Return the enclosing method for the given class.
1961
1962    IN:
1963        c ... class to return the enclosing method for
1964
1965    RETURN:
1966        methodinfo of the enclosing method
1967
1968 *******************************************************************************/
1969
1970 methodinfo *class_get_enclosingmethod_raw(classinfo *c)
1971 {
1972         constant_nameandtype *cn;
1973         classinfo            *ec;
1974         methodinfo           *m;
1975
1976         /* get enclosing class and method */
1977
1978         ec = class_get_enclosingclass(c);
1979         cn = c->enclosingmethod;
1980
1981         /* check for enclosing class and method */
1982
1983         if (ec == NULL)
1984                 return NULL;
1985
1986         if (cn == NULL)
1987                 return NULL;
1988
1989         /* find method in enclosing class */
1990
1991         m = class_findmethod(ec, cn->name, cn->descriptor);
1992
1993         if (m == NULL) {
1994                 exceptions_throw_internalerror("Enclosing method doesn't exist");
1995                 return NULL;
1996         }
1997
1998         return m;
1999 }
2000
2001
2002 /**
2003  * Return the enclosing method as java.lang.reflect.Method object for
2004  * the given class.
2005  *
2006  * @param c class to return the enclosing method for
2007  *
2008  * @return java.lang.reflect.Method object of the enclosing method
2009  */
2010 #if defined(ENABLE_JAVASE)
2011 java_handle_t* class_get_enclosingmethod(classinfo *c)
2012 {
2013         methodinfo*    m;
2014
2015         m = class_get_enclosingmethod_raw(c);
2016
2017         if (m == NULL)
2018                 return NULL;
2019
2020         /* check for <init> */
2021
2022         if (m->name == utf_init)
2023                 return NULL;
2024
2025         // Create a java.lang.reflect.Method object.
2026
2027         java_lang_reflect_Method rm(m);
2028
2029         return rm.get_handle();
2030 }
2031 #endif
2032
2033
2034 /* class_get_interfaces ********************************************************
2035
2036    Return an array of interfaces of the given class.
2037
2038 *******************************************************************************/
2039
2040 java_handle_objectarray_t *class_get_interfaces(classinfo *c)
2041 {
2042         classinfo                 *ic;
2043         java_handle_objectarray_t *oa;
2044         u4                         i;
2045
2046         if (!(c->state & CLASS_LINKED))
2047                 if (!link_class(c))
2048                         return NULL;
2049
2050         oa = builtin_anewarray(c->interfacescount, class_java_lang_Class);
2051
2052         if (oa == NULL)
2053                 return NULL;
2054
2055         for (i = 0; i < c->interfacescount; i++) {
2056                 ic = c->interfaces[i];
2057
2058                 LLNI_array_direct(oa, i) = (java_object_t *) ic;
2059         }
2060
2061         return oa;
2062 }
2063
2064
2065 /* class_get_annotations *******************************************************
2066
2067    Get the unparsed declared annotations in a byte array
2068    of the given class.
2069
2070    IN:
2071        c........the class of which the annotations should be returned
2072
2073    RETURN VALUE:
2074        The unparsed declared annotations in a byte array
2075        (or NULL if there aren't any).
2076
2077 *******************************************************************************/
2078
2079 java_handle_bytearray_t *class_get_annotations(classinfo *c)
2080 {
2081 #if defined(ENABLE_ANNOTATIONS)
2082         java_handle_t *annotations; /* unparsed annotations */
2083
2084         LLNI_classinfo_field_get(c, annotations, annotations);
2085
2086         return (java_handle_bytearray_t*)annotations;
2087 #else
2088         return NULL;
2089 #endif
2090 }
2091
2092
2093 /* class_get_modifiers *********************************************************
2094
2095    Get the modifier flags of the given class.
2096
2097    IN:
2098        c....the class of which the modifier flags should be returned
2099            ignoreInnerClassesAttrib
2100    RETURN VALUE:
2101        modifier flags
2102
2103 *******************************************************************************/
2104
2105 int32_t class_get_modifiers(classinfo *c, bool ignoreInnerClassesAttrib)
2106 {
2107         classref_or_classinfo  inner;
2108         classref_or_classinfo  outer;
2109         utf                   *innername;
2110         int                    i;
2111
2112         if (!ignoreInnerClassesAttrib && (c->innerclasscount != 0)) {
2113                 /* search for passed class as inner class */
2114
2115                 for (i = 0; i < c->innerclasscount; i++) {
2116                         inner = c->innerclass[i].inner_class;
2117                         outer = c->innerclass[i].outer_class;
2118
2119                         /* Check if inner is a classref or a real class and get
2120                the name of the structure */
2121
2122                         innername = IS_CLASSREF(inner) ? inner.ref->name : inner.cls->name;
2123
2124                         /* innerclass is this class */
2125
2126                         if (innername == c->name) {
2127                                 /* has the class actually an outer class? */
2128
2129                                 if (outer.any)
2130                                         /* return flags got from the outer class file */
2131                                         return c->innerclass[i].flags & ACC_CLASS_REFLECT_MASK;
2132                                 else
2133                                         return c->flags & ACC_CLASS_REFLECT_MASK;
2134                         }
2135                 }
2136         }
2137
2138         /* passed class is no inner class or it was not requested */
2139
2140         return c->flags & ACC_CLASS_REFLECT_MASK;
2141 }
2142
2143
2144 /* class_get_signature *********************************************************
2145
2146    Return the signature of the given class.  For array and primitive
2147    classes return NULL.
2148
2149 *******************************************************************************/
2150
2151 #if defined(ENABLE_JAVASE)
2152 utf *class_get_signature(classinfo *c)
2153 {
2154         /* For array and primitive classes return NULL. */
2155
2156         if (class_is_array(c) || class_is_primitive(c))
2157                 return NULL;
2158
2159         return c->signature;
2160 }
2161 #endif
2162
2163
2164 /* class_printflags ************************************************************
2165
2166    Prints flags of a class.
2167
2168 *******************************************************************************/
2169
2170 #if !defined(NDEBUG)
2171 void class_printflags(classinfo *c)
2172 {
2173         if (c == NULL) {
2174                 printf("NULL");
2175                 return;
2176         }
2177
2178         if (c->flags & ACC_PUBLIC)       printf(" PUBLIC");
2179         if (c->flags & ACC_PRIVATE)      printf(" PRIVATE");
2180         if (c->flags & ACC_PROTECTED)    printf(" PROTECTED");
2181         if (c->flags & ACC_STATIC)       printf(" STATIC");
2182         if (c->flags & ACC_FINAL)        printf(" FINAL");
2183         if (c->flags & ACC_SYNCHRONIZED) printf(" SYNCHRONIZED");
2184         if (c->flags & ACC_VOLATILE)     printf(" VOLATILE");
2185         if (c->flags & ACC_TRANSIENT)    printf(" TRANSIENT");
2186         if (c->flags & ACC_NATIVE)       printf(" NATIVE");
2187         if (c->flags & ACC_INTERFACE)    printf(" INTERFACE");
2188         if (c->flags & ACC_ABSTRACT)     printf(" ABSTRACT");
2189 }
2190 #endif
2191
2192
2193 /* class_print *****************************************************************
2194
2195    Prints classname plus flags.
2196
2197 *******************************************************************************/
2198
2199 #if !defined(NDEBUG)
2200 void class_print(classinfo *c)
2201 {
2202         if (c == NULL) {
2203                 printf("NULL");
2204                 return;
2205         }
2206
2207         utf_display_printable_ascii(c->name);
2208         class_printflags(c);
2209 }
2210 #endif
2211
2212
2213 /* class_classref_print ********************************************************
2214
2215    Prints classname plus referer class.
2216
2217 *******************************************************************************/
2218
2219 #if !defined(NDEBUG)
2220 void class_classref_print(constant_classref *cr)
2221 {
2222         if (cr == NULL) {
2223                 printf("NULL");
2224                 return;
2225         }
2226
2227         utf_display_printable_ascii(cr->name);
2228         printf("(ref.by ");
2229         if (cr->referer)
2230                 class_print(cr->referer);
2231         else
2232                 printf("NULL");
2233         printf(")");
2234 }
2235 #endif
2236
2237
2238 /* class_println ***************************************************************
2239
2240    Prints classname plus flags and new line.
2241
2242 *******************************************************************************/
2243
2244 #if !defined(NDEBUG)
2245 void class_println(classinfo *c)
2246 {
2247         class_print(c);
2248         printf("\n");
2249 }
2250 #endif
2251
2252
2253 /* class_classref_println ******************************************************
2254
2255    Prints classname plus referer class and new line.
2256
2257 *******************************************************************************/
2258
2259 #if !defined(NDEBUG)
2260 void class_classref_println(constant_classref *cr)
2261 {
2262         class_classref_print(cr);
2263         printf("\n");
2264 }
2265 #endif
2266
2267
2268 /* class_classref_or_classinfo_print *******************************************
2269
2270    Prints classname plus referer class.
2271
2272 *******************************************************************************/
2273
2274 #if !defined(NDEBUG)
2275 void class_classref_or_classinfo_print(classref_or_classinfo c)
2276 {
2277         if (c.any == NULL) {
2278                 printf("(classref_or_classinfo) NULL");
2279                 return;
2280         }
2281         if (IS_CLASSREF(c))
2282                 class_classref_print(c.ref);
2283         else
2284                 class_print(c.cls);
2285 }
2286 #endif
2287
2288
2289 /* class_classref_or_classinfo_println *****************************************
2290
2291    Prints classname plus referer class and a newline.
2292
2293 *******************************************************************************/
2294
2295 #if !defined(NDEBUG)
2296 void class_classref_or_classinfo_println(classref_or_classinfo c)
2297 {
2298         class_classref_or_classinfo_print(c);
2299         printf("\n");
2300 }
2301 #endif
2302
2303
2304 /* class_showconstantpool ******************************************************
2305
2306    Dump the constant pool of the given class to stdout.
2307
2308 *******************************************************************************/
2309
2310 #if !defined(NDEBUG)
2311 void class_showconstantpool (classinfo *c)
2312 {
2313         u4 i;
2314         void* e;
2315
2316         printf ("---- dump of constant pool ----\n");
2317
2318         for (i=0; i<c->cpcount; i++) {
2319                 printf ("#%d:  ", (int) i);
2320
2321                 e = c -> cpinfos [i];
2322                 if (e) {
2323
2324                         switch (c -> cptags [i]) {
2325                         case CONSTANT_Class:
2326                                 printf ("Classreference -> ");
2327                                 utf_display_printable_ascii ( ((constant_classref*)e) -> name );
2328                                 break;
2329                         case CONSTANT_Fieldref:
2330                                 printf ("Fieldref -> ");
2331                                 field_fieldref_print((constant_FMIref *) e);
2332                                 break;
2333                         case CONSTANT_Methodref:
2334                                 printf ("Methodref -> ");
2335                                 method_methodref_print((constant_FMIref *) e);
2336                                 break;
2337                         case CONSTANT_InterfaceMethodref:
2338                                 printf ("InterfaceMethod -> ");
2339                                 method_methodref_print((constant_FMIref *) e);
2340                                 break;
2341                         case CONSTANT_String:
2342                                 printf ("String -> ");
2343                                 utf_display_printable_ascii ((utf*) e);
2344                                 break;
2345                         case CONSTANT_Integer:
2346                                 printf ("Integer -> %d", (int) ( ((constant_integer*)e) -> value) );
2347                                 break;
2348                         case CONSTANT_Float:
2349                                 printf ("Float -> %f", ((constant_float*)e) -> value);
2350                                 break;
2351                         case CONSTANT_Double:
2352                                 printf ("Double -> %f", ((constant_double*)e) -> value);
2353                                 break;
2354                         case CONSTANT_Long:
2355                                 printf ("Long -> %ld", (long int) ((constant_long*)e) -> value);
2356                                 break;
2357                         case CONSTANT_NameAndType:
2358                                 {
2359                                         constant_nameandtype *cnt = (constant_nameandtype *) e;
2360                                         printf ("NameAndType: ");
2361                                         utf_display_printable_ascii (cnt->name);
2362                                         printf (" ");
2363                                         utf_display_printable_ascii (cnt->descriptor);
2364                                 }
2365                                 break;
2366                         case CONSTANT_Utf8:
2367                                 printf ("Utf8 -> ");
2368                                 utf_display_printable_ascii ((utf*) e);
2369                                 break;
2370                         default:
2371                                 log_text("Invalid type of ConstantPool-Entry");
2372                                 assert(0);
2373                         }
2374                 }
2375
2376                 printf ("\n");
2377         }
2378 }
2379 #endif /* !defined(NDEBUG) */
2380
2381
2382 /* class_showmethods ***********************************************************
2383
2384    Dump info about the fields and methods of the given class to stdout.
2385
2386 *******************************************************************************/
2387
2388 #if !defined(NDEBUG)
2389 void class_showmethods (classinfo *c)
2390 {
2391         s4 i;
2392
2393         printf("--------- Fields and Methods ----------------\n");
2394         printf("Flags: ");
2395         class_printflags(c);
2396         printf("\n");
2397
2398         printf("This: ");
2399         utf_display_printable_ascii(c->name);
2400         printf("\n");
2401
2402         if (c->super) {
2403                 printf("Super: ");
2404                 utf_display_printable_ascii(c->super->name);
2405                 printf ("\n");
2406         }
2407
2408         printf("Index: %d\n", c->index);
2409
2410         printf("Interfaces:\n");
2411         for (i = 0; i < c->interfacescount; i++) {
2412                 printf("   ");
2413                 utf_display_printable_ascii(c->interfaces[i]->name);
2414                 printf (" (%d)\n", c->interfaces[i]->index);
2415         }
2416
2417         printf("Fields:\n");
2418         for (i = 0; i < c->fieldscount; i++)
2419                 field_println(&(c->fields[i]));
2420
2421         printf("Methods:\n");
2422         for (i = 0; i < c->methodscount; i++) {
2423                 methodinfo *m = &(c->methods[i]);
2424
2425                 if (!(m->flags & ACC_STATIC))
2426                         printf("vftblindex: %d   ", m->vftblindex);
2427
2428                 method_println(m);
2429         }
2430
2431         printf ("Virtual function table:\n");
2432         for (i = 0; i < c->vftbl->vftbllength; i++)
2433                 printf ("entry: %d,  %ld\n", i, (long int) (c->vftbl->table[i]));
2434 }
2435 #endif /* !defined(NDEBUG) */
2436
2437
2438 /*
2439  * These are local overrides for various environment variables in Emacs.
2440  * Please do not remove this and leave it at the end of the file, where
2441  * Emacs will automagically detect them.
2442  * ---------------------------------------------------------------------
2443  * Local variables:
2444  * mode: c
2445  * indent-tabs-mode: t
2446  * c-basic-offset: 4
2447  * tab-width: 4
2448  * End:
2449  * vim:noexpandtab:sw=4:ts=4:
2450  */