src/native/native.c

   1 /* native/native.c - table of native functions
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4    R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser,
   5    M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck,
   6    P. Tomsich, J. Wenninger
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  23    02111-1307, USA.
  24
  25    Contact: cacao@complang.tuwien.ac.at
  26
  27    Authors: Reinhard Grafl
  28             Roman Obermaisser
  29             Andreas Krall
  30
  31    The .hh files created with the header file generator are all
  32    included here as are the C functions implementing these methods.
  33
  34    $Id: native.c 1727 2004-12-07 10:56:02Z twisti $
  35
  36 */
  37
  38
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <time.h>
  42 #include <math.h>
  43 #include <string.h>
  44 #include <assert.h>
  45 #include <sys/time.h>
  46 #include <utime.h>
  47
  48 /* Include files for IO functions */
  49
  50 #include <fcntl.h>
  51 #include <dirent.h>
  52 #include <sys/types.h>
  53 #ifdef _OSF_SOURCE
  54 #include <sys/mode.h>
  55 #endif
  56 #include <sys/stat.h>
  57
  58 #include "config.h"
  59 #include "mm/memory.h"
  60 #include "native/jni.h"
  61 #include "native/native.h"
  62 #include "native/include/java_lang_Throwable.h"
  63 #include "toolbox/logging.h"
  64 #include "vm/builtin.h"
  65 #include "vm/exceptions.h"
  66 #include "vm/global.h"
  67 #include "vm/loader.h"
  68 #include "vm/options.h"
  69 #include "vm/tables.h"
  70 #include "vm/jit/asmpart.h"
  71 #include "vm/jit/jit.h"
  72 #if 0
  73 #include "threads/thread.h"
  74 #include "threads/threadio.h"
  75 #include "threads/locks.h"
  76 #endif
  77
  78
  79 /* include table of native functions ******************************************/
  80
  81 /* XXX quick hack? */
  82 #if defined(USE_GTK)
  83 #include "native/vm/GtkComponentPeer.c"
  84 #include "native/vm/GtkScrollPanePeer.c"
  85 #include "native/vm/GtkFileDialogPeer.c"
  86 #endif
  87
  88 #include "nativetable.inc"
  89
  90
  91 /* for java-string to char conversion */
  92 #define MAXSTRINGSIZE 1000
  93
  94
  95 /******************** systemclasses required for native methods ***************/
  96
  97 classinfo *class_java_lang_Class;
  98 classinfo *class_java_lang_VMClass;
  99 classinfo *class_java_lang_System;
 100 classinfo *class_java_lang_ClassLoader;
 101 classinfo *class_gnu_java_lang_SystemClassLoader;
 102 classinfo *class_java_lang_SecurityManager;
 103 classinfo *class_java_lang_Double;
 104 classinfo *class_java_lang_Float;
 105 classinfo *class_java_lang_Long;
 106 classinfo *class_java_lang_Byte;
 107 classinfo *class_java_lang_Short;
 108 classinfo *class_java_lang_Boolean;
 109 classinfo *class_java_lang_Void;
 110 classinfo *class_java_lang_Character;
 111 classinfo *class_java_lang_Integer;
 112
 113 methodinfo *method_vmclass_init;
 114
 115
 116 /* the system classloader object */
 117 struct java_lang_ClassLoader *SystemClassLoader = NULL;
 118
 119 /* for raising exceptions from native methods */
 120 #if !defined(USE_THREADS) || !defined(NATIVE_THREADS)
 121 java_objectheader* _exceptionptr = NULL;
 122 #endif
 123
 124 /************* use classinfo structure as java.lang.Class object **************/
 125
 126 void use_class_as_object(classinfo *c)
 127 {
 128         if (!c->classvftbl) {
 129                 c->header.vftbl = class_java_lang_Class->vftbl;
 130                 c->classvftbl = true;
 131         }
 132
 133 }
 134
 135
 136 /************************** tables for methods ********************************/
 137
 138 #undef JOWENN_DEBUG
 139 #undef JOWENN_DEBUG1
 140
 141 #ifdef STATIC_CLASSPATH
 142 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 143
 144 /* table for fast string comparison */
 145 static nativecompref nativecomptable[NATIVETABLESIZE];
 146
 147 /* string comparsion table initialized */
 148 static bool nativecompdone = false;
 149 #endif
 150
 151
 152 /* XXX don't define this in a header file!!! */
 153
 154 static struct nativeCall nativeCalls[] =
 155 {
 156 #include "nativecalls.inc"
 157 };
 158
 159 #define NATIVECALLSSIZE    (sizeof(nativeCalls) / sizeof(struct nativeCall))
 160
 161 struct nativeCompCall nativeCompCalls[NATIVECALLSSIZE];
 162
 163 /******************************************************************************/
 164
 165 /**include "natcalls.h" **/
 166
 167
 168 /*********************** function: native_loadclasses **************************
 169
 170         load classes required for native methods
 171
 172 *******************************************************************************/
 173
 174 void native_loadclasses()
 175 {
 176         static int classesLoaded = 0; /*temporary hack JoWenn*/
 177
 178         if (classesLoaded)
 179                 return;
 180
 181         classesLoaded = 1;
 182
 183         class_java_lang_Cloneable =
 184                 class_new(utf_new_char("java/lang/Cloneable"));
 185         class_load(class_java_lang_Cloneable);
 186         class_link(class_java_lang_Cloneable);
 187
 188         class_java_lang_Class =
 189                 class_new(utf_new_char("java/lang/Class"));
 190         class_load(class_java_lang_Class);
 191         class_link(class_java_lang_Class);
 192
 193         class_java_lang_VMClass =
 194                 class_new(utf_new_char("java/lang/VMClass"));
 195         class_load(class_java_lang_VMClass);
 196         class_link(class_java_lang_VMClass);
 197
 198         class_java_lang_ClassLoader =
 199                 class_new(utf_new_char("java/lang/ClassLoader"));
 200         class_load(class_java_lang_ClassLoader);
 201         class_link(class_java_lang_ClassLoader);
 202
 203         /* load classes for wrapping primitive types */
 204         class_java_lang_Double = class_new(utf_new_char("java/lang/Double"));
 205         class_load(class_java_lang_Double);
 206         class_link(class_java_lang_Double);
 207
 208         class_java_lang_Float = class_new(utf_new_char("java/lang/Float"));
 209         class_load(class_java_lang_Float);
 210         class_link(class_java_lang_Float);
 211
 212         class_java_lang_Character =     class_new(utf_new_char("java/lang/Character"));
 213         class_load(class_java_lang_Character);
 214         class_link(class_java_lang_Character);
 215
 216         class_java_lang_Integer = class_new(utf_new_char("java/lang/Integer"));
 217         class_load(class_java_lang_Integer);
 218         class_link(class_java_lang_Integer);
 219
 220         class_java_lang_Long = class_new(utf_new_char("java/lang/Long"));
 221         class_load(class_java_lang_Long);
 222         class_link(class_java_lang_Long);
 223
 224         class_java_lang_Byte = class_new(utf_new_char("java/lang/Byte"));
 225         class_load(class_java_lang_Byte);
 226         class_link(class_java_lang_Byte);
 227
 228         class_java_lang_Short = class_new(utf_new_char("java/lang/Short"));
 229         class_load(class_java_lang_Short);
 230         class_link(class_java_lang_Short);
 231
 232         class_java_lang_Boolean = class_new(utf_new_char("java/lang/Boolean"));
 233         class_load(class_java_lang_Boolean);
 234         class_link(class_java_lang_Boolean);
 235
 236         class_java_lang_Void = class_new(utf_new_char("java/lang/Void"));
 237         class_load(class_java_lang_Void);
 238         class_link(class_java_lang_Void);
 239
 240 }
 241
 242
 243 /*****************************************************************************
 244
 245         create systemclassloader object and initialize instance fields
 246
 247 ******************************************************************************/
 248
 249 void init_systemclassloader()
 250 {
 251         log_text("init_systemclassloader");
 252         if (!SystemClassLoader) {
 253                 native_loadclasses();
 254                 log_text("Initializing new system class loader");
 255                 /* create object and call initializer */
 256                 SystemClassLoader = (java_lang_ClassLoader *) native_new_and_init(class_new(utf_new_char("gnu/java/lang/SystemClassLoader")));
 257
 258                 /* systemclassloader has no parent */
 259                 SystemClassLoader->parent      = NULL;
 260                 SystemClassLoader->initialized = true;
 261         }
 262         log_text("leaving system class loader");
 263 }
 264
 265
 266 /*********************** Function: native_findfunction *************************
 267
 268         Looks up a method (must have the same class name, method name, descriptor
 269         and 'static'ness) and returns a function pointer to it.
 270         Returns: function pointer or NULL (if there is no such method)
 271
 272         Remark: For faster operation, the names/descriptors are converted from C
 273                 strings to Unicode the first time this function is called.
 274
 275 *******************************************************************************/
 276
 277 functionptr native_findfunction(utf *cname, utf *mname,
 278                                                                 utf *desc, bool isstatic)
 279 {
 280 #ifdef STATIC_CLASSPATH
 281         int i;
 282         /* entry of table for fast string comparison */
 283         struct nativecompref *n;
 284         /* for warning message if no function is found */
 285         char *buffer;
 286         int buffer_len;
 287
 288         isstatic = isstatic ? true : false;
 289
 290         if (!nativecompdone) {
 291                 for (i = 0; i < NATIVETABLESIZE; i++) {
 292                         nativecomptable[i].classname  =
 293                                 utf_new_char(nativetable[i].classname);
 294                         nativecomptable[i].methodname =
 295                                 utf_new_char(nativetable[i].methodname);
 296                         nativecomptable[i].descriptor =
 297                                 utf_new_char(nativetable[i].descriptor);
 298                         nativecomptable[i].isstatic   =
 299                                 nativetable[i].isstatic;
 300                         nativecomptable[i].func       =
 301                                 nativetable[i].func;
 302                 }
 303                 nativecompdone = true;
 304         }
 305
 306 #ifdef JOWENN_DEBUG
 307         buffer_len =
 308                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 309
 310         buffer = MNEW(char, buffer_len);
 311
 312         strcpy(buffer, "searching matching function in native table:");
 313         utf_sprint(buffer+strlen(buffer), mname);
 314         strcpy(buffer+strlen(buffer), ": ");
 315         utf_sprint(buffer+strlen(buffer), desc);
 316         strcpy(buffer+strlen(buffer), " for class ");
 317         utf_sprint(buffer+strlen(buffer), cname);
 318
 319         log_text(buffer);
 320
 321         MFREE(buffer, char, buffer_len);
 322 #endif
 323
 324         for (i = 0; i < NATIVETABLESIZE; i++) {
 325                 n = &(nativecomptable[i]);
 326
 327                 if (cname == n->classname && mname == n->methodname &&
 328                     desc == n->descriptor && isstatic == n->isstatic)
 329                         return n->func;
 330 #ifdef JOWENN_DEBUG
 331                         else {
 332                                 if (cname == n->classname && mname == n->methodname )  log_text("static and descriptor mismatch");
 333
 334                                 else {
 335                                         buffer_len =
 336                                           utf_strlen(n->classname) + utf_strlen(n->methodname) + utf_strlen(n->descriptor) + 64;
 337
 338                                         buffer = MNEW(char, buffer_len);
 339
 340                                         strcpy(buffer, "comparing with:");
 341                                         utf_sprint(buffer+strlen(buffer), n->methodname);
 342                                         strcpy (buffer+strlen(buffer), ": ");
 343                                         utf_sprint(buffer+strlen(buffer), n->descriptor);
 344                                         strcpy(buffer+strlen(buffer), " for class ");
 345                                         utf_sprint(buffer+strlen(buffer), n->classname);
 346
 347                                         log_text(buffer);
 348
 349                                         MFREE(buffer, char, buffer_len);
 350                                 }
 351                         }
 352 #endif
 353         }
 354
 355
 356         /* no function was found, display warning */
 357
 358         buffer_len =
 359                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 360
 361         buffer = MNEW(char, buffer_len);
 362
 363         strcpy(buffer, "warning: native function ");
 364         utf_sprint(buffer + strlen(buffer), mname);
 365         strcpy(buffer + strlen(buffer), ": ");
 366         utf_sprint(buffer + strlen(buffer), desc);
 367         strcpy(buffer + strlen(buffer), " not found in class ");
 368         utf_sprint(buffer + strlen(buffer), cname);
 369
 370         log_text(buffer);
 371
 372         MFREE(buffer, char, buffer_len);
 373
 374 /*      exit(1); */
 375
 376         /* keep compiler happy */
 377         return NULL;
 378 #else
 379 /* dynamic classpath */
 380   return 0;
 381 #endif
 382 }
 383
 384
 385 /********************** function: javastring_new *******************************
 386
 387         creates a new object of type java/lang/String with the text of
 388         the specified utf8-string
 389
 390         return: pointer to the string or NULL if memory is exhausted.
 391
 392 *******************************************************************************/
 393
 394 java_lang_String *javastring_new(utf *u)
 395 {
 396         char *utf_ptr;                  /* current utf character in utf string    */
 397         u4 utflength;                   /* length of utf-string if uncompressed   */
 398         java_lang_String *s;                /* result-string                          */
 399         java_chararray *a;
 400         s4 i;
 401
 402         if (!u) {
 403                 *exceptionptr = new_nullpointerexception();
 404                 return NULL;
 405         }
 406
 407         utf_ptr = u->text;
 408         utflength = utf_strlen(u);
 409
 410         s = (java_lang_String *) builtin_new(class_java_lang_String);
 411         a = builtin_newarray_char(utflength);
 412
 413         /* javastring or character-array could not be created */
 414         if (!a || !s)
 415                 return NULL;
 416
 417         /* decompress utf-string */
 418         for (i = 0; i < utflength; i++)
 419                 a->data[i] = utf_nextu2(&utf_ptr);
 420
 421         /* set fields of the javastring-object */
 422         s->value  = a;
 423         s->offset = 0;
 424         s->count  = utflength;
 425
 426         return s;
 427 }
 428
 429
 430 /********************** function: javastring_new_char **************************
 431
 432         creates a new java/lang/String object which contains the convertet
 433         C-string passed via text.
 434
 435         return: the object pointer or NULL if memory is exhausted.
 436
 437 *******************************************************************************/
 438
 439 java_lang_String *javastring_new_char(char *text)
 440 {
 441         s4 i;
 442         s4 len;                /* length of the string */
 443         java_lang_String *s;   /* result-string */
 444         java_chararray *a;
 445
 446         if (!text) {
 447                 *exceptionptr = new_nullpointerexception();
 448                 return NULL;
 449         }
 450
 451         len = strlen(text);
 452
 453         s = (java_lang_String *) builtin_new(class_java_lang_String);
 454         a = builtin_newarray_char(len);
 455
 456         /* javastring or character-array could not be created */
 457         if (!a || !s)
 458                 return NULL;
 459
 460         /* copy text */
 461         for (i = 0; i < len; i++)
 462                 a->data[i] = text[i];
 463
 464         /* set fields of the javastring-object */
 465         s->value  = a;
 466         s->offset = 0;
 467         s->count  = len;
 468
 469         return s;
 470 }
 471
 472
 473 /************************* function javastring_tochar **************************
 474
 475         converts a Java string into a C string.
 476
 477         return: pointer to C string
 478
 479         Caution: every call of this function overwrites the previous string !!!
 480
 481 *******************************************************************************/
 482
 483 static char stringbuffer[MAXSTRINGSIZE];
 484
 485 char *javastring_tochar(java_objectheader *so)
 486 {
 487         java_lang_String *s = (java_lang_String *) so;
 488         java_chararray *a;
 489         s4 i;
 490
 491         if (!s)
 492                 return "";
 493
 494         a = s->value;
 495
 496         if (!a)
 497                 return "";
 498
 499         if (s->count > MAXSTRINGSIZE)
 500                 return "";
 501
 502         for (i = 0; i < s->count; i++)
 503                 stringbuffer[i] = a->data[s->offset + i];
 504
 505         stringbuffer[i] = '\0';
 506
 507         return stringbuffer;
 508 }
 509
 510
 511 /****************** function class_findfield_approx ****************************
 512
 513         searches in 'classinfo'-structure for a field with the
 514         specified name
 515
 516 *******************************************************************************/
 517
 518 fieldinfo *class_findfield_approx(classinfo *c, utf *name)
 519 {
 520         s4 i;
 521
 522         for (i = 0; i < c->fieldscount; i++) {
 523                 /* compare field names */
 524                 if ((c->fields[i].name == name))
 525                         return &(c->fields[i]);
 526         }
 527
 528         /* field was not found, raise exception */
 529         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 530
 531         return NULL;
 532 }
 533
 534
 535 s4 class_findfield_index_approx(classinfo *c, utf *name)
 536 {
 537         s4 i;
 538
 539         for (i = 0; i < c->fieldscount; i++) {
 540                 /* compare field names */
 541                 if ((c->fields[i].name == name))
 542                         return i;
 543         }
 544
 545         /* field was not found, raise exception */
 546         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 547
 548         return -1;
 549 }
 550
 551
 552 /********************** function: native_new_and_init *************************
 553
 554         Creates a new object on the heap and calls the initializer.
 555         Returns the object pointer or NULL if memory is exhausted.
 556
 557 *******************************************************************************/
 558
 559 java_objectheader *native_new_and_init(classinfo *c)
 560 {
 561         methodinfo *m;
 562         java_objectheader *o;
 563
 564         if (!c)
 565                 return *exceptionptr;
 566
 567         o = builtin_new(c);                 /* create object                      */
 568
 569         if (!o)
 570                 return NULL;
 571
 572         /* find initializer */
 573
 574         m = class_findmethod(c,
 575                                                  utf_new_char("<init>"),
 576                                                  utf_new_char("()V"));
 577
 578         if (!m) {                           /* initializer not found              */
 579                 if (opt_verbose) {
 580                         char logtext[MAXLOGTEXT];
 581                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 582                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 583                         log_text(logtext);
 584                 }
 585                 return o;
 586         }
 587
 588         /* call initializer */
 589
 590         asm_calljavafunction(m, o, NULL, NULL, NULL);
 591
 592         return o;
 593 }
 594
 595
 596 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
 597 {
 598         methodinfo *m;
 599         java_objectheader *o;
 600
 601         if (!c)
 602                 return *exceptionptr;
 603
 604         o = builtin_new(c);          /* create object          */
 605
 606         if (!o)
 607                 return NULL;
 608
 609         /* find initializer */
 610
 611         m = class_findmethod(c,
 612                                                  utf_new_char("<init>"),
 613                                                  utf_new_char("(Ljava/lang/String;)V"));
 614
 615         if (!m) {                                       /* initializer not found  */
 616                 if (opt_verbose) {
 617                         char logtext[MAXLOGTEXT];
 618                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 619                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 620                         log_text(logtext);
 621                 }
 622                 return o;
 623         }
 624
 625         /* call initializer */
 626
 627         asm_calljavafunction(m, o, s, NULL, NULL);
 628
 629         return o;
 630 }
 631
 632
 633 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
 634 {
 635         methodinfo *m;
 636         java_objectheader *o;
 637
 638         if (!c)
 639                 return *exceptionptr;
 640
 641         o = builtin_new(c);          /* create object          */
 642
 643         if (!o) return NULL;
 644
 645         /* find initializer */
 646
 647         m = class_findmethod(c,
 648                                                  utf_new_char("<init>"),
 649                                                  utf_new_char("(I)V"));
 650
 651         if (!m) {                                       /* initializer not found  */
 652                 if (opt_verbose) {
 653                         char logtext[MAXLOGTEXT];
 654                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 655                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 656                         log_text(logtext);
 657                 }
 658                 return o;
 659         }
 660
 661         /* call initializer */
 662
 663 #if defined(__I386__) || defined(__POWERPC__)
 664         asm_calljavafunction(m, o, (void *) i, NULL, NULL);
 665 #else
 666         asm_calljavafunction(m, o, (void *) (s8) i, NULL, NULL);
 667 #endif
 668
 669         return o;
 670 }
 671
 672
 673 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
 674 {
 675         methodinfo *m;
 676         java_objectheader *o;
 677
 678         if (!c)
 679                 return *exceptionptr;
 680
 681         o = builtin_new(c);          /* create object          */
 682
 683         if (!o) return NULL;
 684
 685         /* find initializer */
 686
 687         m = class_findmethod(c,
 688                                                  utf_new_char("<init>"),
 689                                                  utf_new_char("(Ljava/lang/Throwable;)V"));
 690
 691         if (!m) {                                       /* initializer not found  */
 692                 if (opt_verbose) {
 693                         char logtext[MAXLOGTEXT];
 694                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 695                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 696                         log_text(logtext);
 697                 }
 698                 return o;
 699         }
 700
 701         /* call initializer */
 702
 703         asm_calljavafunction(m, o, t, NULL, NULL);
 704
 705         return o;
 706 }
 707
 708
 709 /******************** function: stringtable_update ****************************
 710
 711         traverses the javastring hashtable and sets the vftbl-entries of
 712         javastrings which were temporarily set to NULL, because
 713         java.lang.Object was not yet loaded
 714
 715 *******************************************************************************/
 716
 717 void stringtable_update ()
 718 {
 719         java_lang_String *js;
 720         java_chararray *a;
 721         literalstring *s;       /* hashtable entry */
 722         int i;
 723
 724         for (i = 0; i < string_hash.size; i++) {
 725                 s = string_hash.ptr[i];
 726                 if (s) {
 727                         while (s) {
 728
 729                                 js = (java_lang_String *) s->string;
 730
 731                                 if (!js || !js->value)
 732                                         /* error in hashtable found */
 733                                         panic("invalid literalstring in hashtable");
 734
 735                                 a = js->value;
 736
 737                                 if (!js->header.vftbl)
 738                                         /* vftbl of javastring is NULL */
 739                                         js->header.vftbl = class_java_lang_String->vftbl;
 740
 741                                 if (!a->header.objheader.vftbl)
 742                                         /* vftbl of character-array is NULL */
 743                                         a->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 744
 745                                 /* follow link in external hash chain */
 746                                 s = s->hashlink;
 747                         }
 748                 }
 749         }
 750 }
 751
 752
 753 /************************* function: u2_utflength ***************************
 754
 755         returns the utf length in bytes of a u2 array
 756
 757 *****************************************************************************/
 758
 759 u4 u2_utflength(u2 *text, u4 u2_length)
 760 {
 761         u4 result_len =  0;  /* utf length in bytes  */
 762         u2 ch;               /* current unicode character */
 763         u4 len;
 764
 765         for (len = 0; len < u2_length; len++) {
 766                 /* next unicode character */
 767                 ch = *text++;
 768
 769                 /* determine bytes required to store unicode character as utf */
 770                 if (ch && (ch < 0x80))
 771                         result_len++;
 772                 else if (ch < 0x800)
 773                         result_len += 2;
 774                 else
 775                         result_len += 3;
 776         }
 777
 778     return result_len;
 779 }
 780
 781
 782 /********************* function: utf_new_u2 ***********************************
 783
 784         make utf symbol from u2 array,
 785         if isclassname is true '.' is replaced by '/'
 786
 787 *******************************************************************************/
 788
 789 utf *utf_new_u2(u2 *unicode_pos, u4 unicode_length, bool isclassname)
 790 {
 791         char *buffer; /* memory buffer for  unicode characters */
 792         char *pos;    /* pointer to current position in buffer */
 793         u4 left;      /* unicode characters left */
 794         u4 buflength; /* utf length in bytes of the u2 array  */
 795         utf *result;  /* resulting utf-string */
 796         int i;
 797
 798         /* determine utf length in bytes and allocate memory */
 799         /* printf("utf_new_u2: unicode_length=%d\n",unicode_length);            */
 800         buflength = u2_utflength(unicode_pos, unicode_length);
 801         buffer    = MNEW(char, buflength);
 802
 803         left = buflength;
 804         pos  = buffer;
 805
 806         for (i = 0; i++ < unicode_length; unicode_pos++) {
 807                 /* next unicode character */
 808                 u2 c = *unicode_pos;
 809
 810                 if ((c != 0) && (c < 0x80)) {
 811                         /* 1 character */
 812                         left--;
 813                 if ((int) left < 0) break;
 814                         /* convert classname */
 815                         if (isclassname && c == '.')
 816                                 *pos++ = '/';
 817                         else
 818                                 *pos++ = (char) c;
 819
 820                 } else if (c < 0x800) {
 821                         /* 2 characters */
 822                 unsigned char high = c >> 6;
 823                 unsigned char low  = c & 0x3F;
 824                         left = left - 2;
 825                 if ((int) left < 0) break;
 826                 *pos++ = high | 0xC0;
 827                 *pos++ = low  | 0x80;
 828
 829                 } else {
 830                 /* 3 characters */
 831                 char low  = c & 0x3f;
 832                 char mid  = (c >> 6) & 0x3F;
 833                 char high = c >> 12;
 834                         left = left - 3;
 835                 if ((int) left < 0) break;
 836                 *pos++ = high | 0xE0;
 837                 *pos++ = mid  | 0x80;
 838                 *pos++ = low  | 0x80;
 839                 }
 840         }
 841
 842         /* insert utf-string into symbol-table */
 843         result = utf_new(buffer,buflength);
 844
 845         MFREE(buffer, char, buflength);
 846
 847         return result;
 848 }
 849
 850
 851 /********************* function: javastring_toutf *****************************
 852
 853         make utf symbol from javastring
 854
 855 *******************************************************************************/
 856
 857 utf *javastring_toutf(java_lang_String *string, bool isclassname)
 858 {
 859         java_lang_String *str = (java_lang_String *) string;
 860
 861 /*      printf("javastring_toutf offset: %d, len %d\n",str->offset, str->count); */
 862 /*      fflush(stdout); */
 863
 864         return utf_new_u2(str->value->data + str->offset, str->count, isclassname);
 865 }
 866
 867
 868 /********************* function: literalstring_u2 *****************************
 869
 870     searches for the javastring with the specified u2-array in
 871     the string hashtable, if there is no such string a new one is
 872     created
 873
 874     if copymode is true a copy of the u2-array is made
 875
 876 *******************************************************************************/
 877
 878 java_objectheader *literalstring_u2(java_chararray *a, u4 length, u4 offset,
 879                                                                         bool copymode)
 880 {
 881     literalstring *s;                /* hashtable element */
 882     java_lang_String *js;            /* u2-array wrapped in javastring */
 883     java_chararray *stringdata;      /* copy of u2-array */
 884     u4 key;
 885     u4 slot;
 886     u2 i;
 887
 888 /* #define DEBUG_LITERALSTRING_U2 */
 889 #ifdef DEBUG_LITERALSTRING_U2
 890     printf("literalstring_u2: length=%d, offset=%d\n", length, offset);
 891         fflush(stdout);
 892 #endif
 893
 894     /* find location in hashtable */
 895     key  = unicode_hashkey(a->data + offset, length);
 896     slot = key & (string_hash.size - 1);
 897     s    = string_hash.ptr[slot];
 898
 899     while (s) {
 900                 js = (java_lang_String *) s->string;
 901
 902                 if (length == js->count) {
 903                         /* compare text */
 904                         for (i = 0; i < length; i++) {
 905                                 if (a->data[offset + i] != js->value->data[i])
 906                                         goto nomatch;
 907                         }
 908
 909                         /* string already in hashtable, free memory */
 910                         if (!copymode)
 911                                 mem_free(a, sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10);
 912
 913 #ifdef DEBUG_LITERALSTRING_U2
 914                         printf("literalstring_u2: foundentry at %p\n", js);
 915                         utf_display(javastring_toutf(js, 0));
 916                         printf("\n\n");
 917                         fflush(stdout);
 918 #endif
 919                         return (java_objectheader *) js;
 920                 }
 921
 922         nomatch:
 923                 /* follow link in external hash chain */
 924                 s = s->hashlink;
 925     }
 926
 927     if (copymode) {
 928                 /* create copy of u2-array for new javastring */
 929                 u4 arraysize = sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10;
 930                 stringdata = mem_alloc(arraysize);
 931 /*              memcpy(stringdata, a, arraysize); */
 932                 memcpy(&(stringdata->header), &(a->header), sizeof(java_arrayheader));
 933                 memcpy(&(stringdata->data), &(a->data) + offset, sizeof(u2) * (length - 1) + 10);
 934
 935     } else {
 936                 stringdata = a;
 937         }
 938
 939     /* location in hashtable found, complete arrayheader */
 940     stringdata->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 941     stringdata->header.size = length;
 942
 943         /* if we use eager loading, we have to check loaded String class */
 944         if (opt_eager) {
 945                 class_java_lang_String =
 946                         class_new_intern(utf_new_char("java/lang/String"));
 947
 948                 if (!class_load(class_java_lang_String))
 949                         return NULL;
 950
 951                 list_addfirst(&unlinkedclasses, class_java_lang_String);
 952         }
 953
 954         /* create new javastring */
 955         js = NEW(java_lang_String);
 956 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
 957         initObjectLock(&js->header);
 958 #endif
 959         js->header.vftbl = class_java_lang_String->vftbl;
 960         js->value  = stringdata;
 961         js->offset = 0;
 962         js->count  = length;
 963
 964 #ifdef DEBUG_LITERALSTRING_U2
 965         printf("literalstring_u2: newly created at %p\n", js);
 966         utf_display(javastring_toutf(js, 0));
 967         printf("\n\n");
 968         fflush(stdout);
 969 #endif
 970
 971         /* create new literalstring */
 972         s = NEW(literalstring);
 973         s->hashlink = string_hash.ptr[slot];
 974         s->string   = (java_objectheader *) js;
 975         string_hash.ptr[slot] = s;
 976
 977         /* update number of hashtable entries */
 978         string_hash.entries++;
 979
 980         /* reorganization of hashtable */
 981         if (string_hash.entries > (string_hash.size * 2)) {
 982                 /* reorganization of hashtable, average length of
 983                    the external chains is approx. 2                */
 984
 985                 u4 i;
 986                 literalstring *s;
 987                 hashtable newhash; /* the new hashtable */
 988
 989                 /* create new hashtable, double the size */
 990                 init_hashtable(&newhash, string_hash.size * 2);
 991                 newhash.entries = string_hash.entries;
 992
 993                 /* transfer elements to new hashtable */
 994                 for (i = 0; i < string_hash.size; i++) {
 995                         s = string_hash.ptr[i];
 996                         while (s) {
 997                                 literalstring *nexts = s->hashlink;
 998                                 js   = (java_lang_String *) s->string;
 999                                 slot = unicode_hashkey(js->value->data, js->count) & (newhash.size - 1);
1000
1001                                 s->hashlink = newhash.ptr[slot];
1002                                 newhash.ptr[slot] = s;
1003
1004                                 /* follow link in external hash chain */
1005                                 s = nexts;
1006                         }
1007                 }
1008
1009                 /* dispose old table */
1010                 MFREE(string_hash.ptr, void*, string_hash.size);
1011                 string_hash = newhash;
1012         }
1013
1014         return (java_objectheader *) js;
1015 }
1016
1017
1018 /******************** Function: literalstring_new *****************************
1019
1020     creates a new javastring with the text of the utf-symbol
1021     and inserts it into the string hashtable
1022
1023 *******************************************************************************/
1024
1025 java_objectheader *literalstring_new(utf *u)
1026 {
1027     char *utf_ptr = u->text;         /* pointer to current unicode character in utf string */
1028     u4 utflength  = utf_strlen(u);   /* length of utf-string if uncompressed */
1029     java_chararray *a;               /* u2-array constructed from utf string */
1030     u4 i;
1031
1032     /* allocate memory */
1033     a = mem_alloc(sizeof(java_chararray) + sizeof(u2) * (utflength - 1) + 10);
1034
1035     /* convert utf-string to u2-array */
1036     for (i = 0; i < utflength; i++)
1037                 a->data[i] = utf_nextu2(&utf_ptr);
1038
1039     return literalstring_u2(a, utflength, 0, false);
1040 }
1041
1042
1043 /********************** function: literalstring_free **************************
1044
1045         removes a javastring from memory
1046
1047 ******************************************************************************/
1048
1049 void literalstring_free(java_objectheader* sobj)
1050 {
1051         java_lang_String *s = (java_lang_String *) sobj;
1052         java_chararray *a = s->value;
1053
1054         /* dispose memory of java.lang.String object */
1055         FREE(s, java_lang_String);
1056
1057         /* dispose memory of java-characterarray */
1058         FREE(a, sizeof(java_chararray) + sizeof(u2) * (a->header.size - 1)); /* +10 ?? */
1059 }
1060
1061
1062 void copy_vftbl(vftbl_t **dest, vftbl_t *src)
1063 {
1064     *dest = src;
1065 #if 0
1066     /* XXX this kind of copying does not work (in the general
1067      * case). The interface tables would have to be copied, too. I
1068      * don't see why we should make a copy anyway. -Edwin
1069      */
1070         *dest = mem_alloc(sizeof(vftbl) + sizeof(methodptr)*(src->vftbllength-1));
1071         memcpy(*dest, src, sizeof(vftbl) - sizeof(methodptr));
1072         memcpy(&(*dest)->table, &src->table, src->vftbllength * sizeof(methodptr));
1073 #endif
1074 }
1075
1076
1077 /******************************************************************************************
1078
1079         creates method signature (excluding return type) from array of
1080         class-objects representing the parameters of the method
1081
1082 *******************************************************************************************/
1083
1084
1085 utf *create_methodsig(java_objectarray* types, char *retType)
1086 {
1087     char *buffer;       /* buffer for building the desciptor */
1088     char *pos;          /* current position in buffer */
1089     utf *result;        /* the method signature */
1090     u4 buffer_size = 3; /* minimal size=3: room for parenthesis and returntype */
1091     u4 i, j;
1092
1093     if (!types) return NULL;
1094
1095     /* determine required buffer-size */
1096     for (i = 0; i < types->header.size; i++) {
1097                 classinfo *c = (classinfo *) types->data[i];
1098                 buffer_size  = buffer_size + c->name->blength + 2;
1099     }
1100
1101     if (retType) buffer_size += strlen(retType);
1102
1103     /* allocate buffer */
1104     buffer = MNEW(char, buffer_size);
1105     pos    = buffer;
1106
1107     /* method-desciptor starts with parenthesis */
1108     *pos++ = '(';
1109
1110     for (i = 0; i < types->header.size; i++) {
1111                 char ch;
1112
1113                 /* current argument */
1114             classinfo *c = (classinfo *) types->data[i];
1115
1116             /* current position in utf-text */
1117             char *utf_ptr = c->name->text;
1118
1119             /* determine type of argument */
1120             if ((ch = utf_nextu2(&utf_ptr)) == '[') {
1121                 /* arrayclass */
1122                 for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1123                                 *pos++ = *utf_ptr; /* copy text */
1124                         }
1125
1126             } else {
1127                         /* check for primitive types */
1128                         for (j = 0; j < PRIMITIVETYPE_COUNT; j++) {
1129                                 char *utf_pos   = utf_ptr - 1;
1130                                 char *primitive = primitivetype_table[j].wrapname;
1131
1132                                 /* compare text */
1133                                 while (utf_pos < utf_end(c->name)) {
1134                                         if (*utf_pos++ != *primitive++) goto nomatch;
1135                                 }
1136
1137                                 /* primitive type found */
1138                                 *pos++ = primitivetype_table[j].typesig;
1139                                 goto next_type;
1140
1141                         nomatch:
1142                                 ;
1143                         }
1144
1145                         /* no primitive type and no arrayclass, so must be object */
1146                         *pos++ = 'L';
1147
1148                         /* copy text */
1149                         for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1150                                 *pos++ = *utf_ptr;
1151                         }
1152
1153                         *pos++ = ';';
1154
1155                 next_type:
1156                         ;
1157                 }
1158     }
1159
1160     *pos++ = ')';
1161
1162     if (retType) {
1163                 for (i = 0; i < strlen(retType); i++) {
1164                         *pos++ = retType[i];
1165                 }
1166     }
1167
1168     /* create utf-string */
1169     result = utf_new(buffer, (pos - buffer));
1170     MFREE(buffer, char, buffer_size);
1171
1172     return result;
1173 }
1174
1175
1176 /******************************************************************************************
1177
1178         retrieve the next argument or returntype from a descriptor
1179         and return the corresponding class
1180
1181 *******************************************************************************************/
1182
1183 classinfo *get_type(char **utf_ptr,char *desc_end, bool skip)
1184 {
1185     classinfo *c = class_from_descriptor(*utf_ptr,desc_end,utf_ptr,
1186                                          (skip) ? CLASSLOAD_SKIP : CLASSLOAD_LOAD);
1187     if (!c)
1188         /* unknown type */
1189         panic("illegal descriptor");
1190
1191     if (skip) return NULL;
1192
1193     use_class_as_object(c);
1194     return c;
1195 }
1196
1197
1198 /* get_parametertypes **********************************************************
1199
1200    use the descriptor of a method to generate a java/lang/Class array
1201    which contains the classes of the parametertypes of the method
1202
1203 *******************************************************************************/
1204
1205 java_objectarray* get_parametertypes(methodinfo *m)
1206 {
1207     utf  *descr    =  m->descriptor;    /* method-descriptor */
1208     char *utf_ptr  =  descr->text;      /* current position in utf-text */
1209     char *desc_end =  utf_end(descr);   /* points behind utf string     */
1210     java_objectarray* result;
1211     int parametercount = 0;
1212     int i;
1213
1214     /* skip '(' */
1215     utf_nextu2(&utf_ptr);
1216
1217     /* determine number of parameters */
1218     while (*utf_ptr != ')') {
1219         get_type(&utf_ptr, desc_end, true);
1220                 parametercount++;
1221     }
1222
1223     /* create class-array */
1224     result = builtin_anewarray(parametercount, class_java_lang_Class);
1225
1226     utf_ptr = descr->text;
1227     utf_nextu2(&utf_ptr);
1228
1229     /* get returntype classes */
1230     for (i = 0; i < parametercount; i++)
1231             result->data[i] =
1232                         (java_objectheader *) get_type(&utf_ptr, desc_end, false);
1233
1234     return result;
1235 }
1236
1237
1238 /* get_exceptiontypes **********************************************************
1239
1240    get the exceptions which can be thrown by a method
1241
1242 *******************************************************************************/
1243
1244 java_objectarray* get_exceptiontypes(methodinfo *m)
1245 {
1246     u2 excount;
1247     u2 i;
1248     java_objectarray *result;
1249
1250         excount = m->thrownexceptionscount;
1251
1252     /* create class-array */
1253     result = builtin_anewarray(excount, class_java_lang_Class);
1254
1255     for (i = 0; i < excount; i++) {
1256                 java_objectheader *o = (java_objectheader *) (m->thrownexceptions[i]);
1257                 use_class_as_object((classinfo *) o);
1258                 result->data[i] = o;
1259     }
1260
1261     return result;
1262 }
1263
1264
1265
1266
1267
1268 /******************************************************************************************
1269
1270         get the returntype class of a method
1271
1272 *******************************************************************************************/
1273
1274 classinfo *get_returntype(methodinfo *m)
1275 {
1276         char *utf_ptr;   /* current position in utf-text */
1277         char *desc_end;  /* points behind utf string     */
1278         utf *desc = m->descriptor; /* method-descriptor  */
1279
1280         utf_ptr  = desc->text;
1281         desc_end = utf_end(desc);
1282
1283         /* ignore parametertypes */
1284         while ((utf_ptr<desc_end) && utf_nextu2(&utf_ptr)!=')')
1285                 /* skip */ ;
1286
1287         return get_type(&utf_ptr,desc_end, false);
1288 }
1289
1290
1291 /*****************************************************************************/
1292 /*****************************************************************************/
1293
1294
1295 /*--------------------------------------------------------*/
1296 void printNativeCall(nativeCall nc) {
1297   int i,j;
1298
1299   printf("\n%s's Native Methods call:\n",nc.classname); fflush(stdout);
1300   for (i=0; i<nc.methCnt; i++) {
1301       printf("\tMethod=%s %s\n",nc.methods[i].methodname, nc.methods[i].descriptor);fflush(stdout);
1302
1303     for (j=0; j<nc.callCnt[i]; j++) {
1304         printf("\t\t<%i,%i>aCalled = %s %s %s\n",i,j,
1305         nc.methods[i].methodCalls[j].classname,
1306         nc.methods[i].methodCalls[j].methodname,
1307         nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1308       }
1309     }
1310   printf("-+++++--------------------\n");fflush(stdout);
1311 }
1312
1313 /*--------------------------------------------------------*/
1314 void printCompNativeCall(nativeCompCall nc) {
1315   int i,j;
1316   printf("printCompNativeCall BEGIN\n");fflush(stdout);
1317   printf("\n%s's Native Comp Methods call:\n",nc.classname->text);fflush(stdout);
1318   utf_display(nc.classname); fflush(stdout);
1319
1320   for (i=0; i<nc.methCnt; i++) {
1321     printf("\tMethod=%s %s\n",nc.methods[i].methodname->text,nc.methods[i].descriptor->text);fflush(stdout);
1322     utf_display(nc.methods[i].methodname); fflush(stdout);
1323     utf_display(nc.methods[i].descriptor);fflush(stdout);
1324     printf("\n");fflush(stdout);
1325
1326     for (j=0; j<nc.callCnt[i]; j++) {
1327       printf("\t\t<%i,%i>bCalled = ",i,j);fflush(stdout);
1328         utf_display(nc.methods[i].methodCalls[j].classname);fflush(stdout);
1329         utf_display(nc.methods[i].methodCalls[j].methodname); fflush(stdout);
1330         utf_display(nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1331         printf("\n");fflush(stdout);
1332       }
1333     }
1334 printf("---------------------\n");fflush(stdout);
1335 }
1336
1337
1338 /*--------------------------------------------------------*/
1339 classMeth findNativeMethodCalls(utf *c, utf *m, utf *d )
1340 {
1341     int i = 0;
1342     int j = 0;
1343     int cnt = 0;
1344     classMeth mc;
1345     mc.i_class = i;
1346     mc.j_method = j;
1347     mc.methCnt = cnt;
1348
1349     return mc;
1350 }
1351
1352 /*--------------------------------------------------------*/
1353 nativeCall* findNativeClassCalls(char *aclassname ) {
1354 int i;
1355
1356 for (i=0;i<NATIVECALLSSIZE; i++) {
1357    /* convert table to utf later to speed up search */
1358    if (strcmp(nativeCalls[i].classname, aclassname) == 0)
1359         return &nativeCalls[i];
1360    }
1361
1362 return NULL;
1363 }
1364 /*--------------------------------------------------------*/
1365 /*--------------------------------------------------------*/
1366 void utfNativeCall(nativeCall nc, nativeCompCall *ncc) {
1367   int i,j;
1368
1369
1370   ncc->classname = utf_new_char(nc.classname);
1371   ncc->methCnt = nc.methCnt;
1372
1373   for (i=0; i<nc.methCnt; i++) {
1374     ncc->methods[i].methodname = utf_new_char(nc.methods[i].methodname);
1375     ncc->methods[i].descriptor = utf_new_char(nc.methods[i].descriptor);
1376     ncc->callCnt[i] = nc.callCnt[i];
1377
1378     for (j=0; j<nc.callCnt[i]; j++) {
1379
1380         ncc->methods[i].methodCalls[j].classname  = utf_new_char(nc.methods[i].methodCalls[j].classname);
1381
1382         if (strcmp("", nc.methods[i].methodCalls[j].methodname) != 0) {
1383           ncc->methods[i].methodCalls[j].methodname = utf_new_char(nc.methods[i].methodCalls[j].methodname);
1384           ncc->methods[i].methodCalls[j].descriptor = utf_new_char(nc.methods[i].methodCalls[j].descriptor);
1385           }
1386         else {
1387           ncc->methods[i].methodCalls[j].methodname = NULL;
1388           ncc->methods[i].methodCalls[j].descriptor = NULL;
1389           }
1390       }
1391     }
1392 }
1393
1394
1395
1396 /*--------------------------------------------------------*/
1397
1398 bool natcall2utf(bool natcallcompdone) {
1399 int i;
1400
1401 if (natcallcompdone)
1402         return true;
1403
1404 for (i=0;i<NATIVECALLSSIZE; i++) {
1405    utfNativeCall  (nativeCalls[i], &nativeCompCalls[i]);
1406    }
1407
1408 return true;
1409 }
1410
1411 /*--------------------------------------------------------*/
1412
1413
1414 java_objectarray *builtin_asm_createclasscontextarray(classinfo **end, classinfo **start)
1415 {
1416 #if defined(__GNUC__)
1417 #warning platform dependend
1418 #endif
1419         java_objectarray *tmpArray;
1420         int i;
1421         classinfo **current;
1422         classinfo *c;
1423         size_t size;
1424
1425         size = (((size_t) start) - ((size_t) end)) / sizeof(classinfo*);
1426
1427         /*printf("end %p, start %p, size %ld\n",end,start,size);*/
1428         if (!class_java_lang_Class)
1429                 class_java_lang_Class = class_new(utf_new_char("java/lang/Class"));
1430
1431         if (!class_java_lang_SecurityManager)
1432                 class_java_lang_SecurityManager =
1433                         class_new(utf_new_char("java/lang/SecurityManager"));
1434
1435         if (size > 0) {
1436                 if (start == class_java_lang_SecurityManager) {
1437                         size--;
1438                         start--;
1439                 }
1440         }
1441
1442         tmpArray =
1443                 builtin_newarray(size, class_array_of(class_java_lang_Class)->vftbl);
1444
1445         for(i = 0, current = start; i < size; i++, current--) {
1446                 c = *current;
1447                 /*              printf("%d\n",i);
1448                 utf_display(c->name);*/
1449                 use_class_as_object(c);
1450                 tmpArray->data[i] = (java_objectheader *) c;
1451         }
1452
1453         return tmpArray;
1454 }
1455
1456
1457 java_lang_ClassLoader *builtin_asm_getclassloader(classinfo **end, classinfo **start)
1458 {
1459 #if defined(__GNUC__)
1460 #warning platform dependend
1461 #endif
1462         int i;
1463         classinfo **current;
1464         classinfo *c;
1465         classinfo *privilegedAction;
1466         size_t size;
1467
1468         size = (((size_t) start) - ((size_t) end)) / sizeof(classinfo*);
1469
1470         /*      log_text("builtin_asm_getclassloader");
1471         printf("end %p, start %p, size %ld\n",end,start,size);*/
1472
1473         if (!class_java_lang_SecurityManager)
1474                 class_java_lang_SecurityManager =
1475                         class_new(utf_new_char("java/lang/SecurityManager"));
1476
1477         if (size > 0) {
1478                 if (start == class_java_lang_SecurityManager) {
1479                         size--;
1480                         start--;
1481                 }
1482         }
1483
1484         privilegedAction=class_new(utf_new_char("java/security/PrivilegedAction"));
1485
1486         for(i = 0, current = start; i < size; i++, current--) {
1487                 c = *current;
1488
1489                 if (c == privilegedAction)
1490                         return NULL;
1491
1492                 if (c->classloader)
1493                         return (java_lang_ClassLoader *) c->classloader;
1494         }
1495
1496         return NULL;
1497
1498         /*
1499         log_text("Java_java_lang_VMSecurityManager_currentClassLoader");
1500         init_systemclassloader();
1501
1502         return SystemClassLoader;*/
1503 }
1504
1505
1506 /*
1507  * These are local overrides for various environment variables in Emacs.
1508  * Please do not remove this and leave it at the end of the file, where
1509  * Emacs will automagically detect them.
1510  * ---------------------------------------------------------------------
1511  * Local variables:
1512  * mode: c
1513  * indent-tabs-mode: t
1514  * c-basic-offset: 4
1515  * tab-width: 4
1516  * End:
1517  */