src/native/native.c

   1 /* native/native.c - table of native functions
   2
   3    Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
   4    R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
   5    C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
   6    Institut f. Computersprachen - TU Wien
   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 1739 2004-12-08 11:01:19Z motse $
  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 #include "nativetable.inc"
  81
  82
  83 /* for java-string to char conversion */
  84 #define MAXSTRINGSIZE 1000
  85
  86
  87 /******************** systemclasses required for native methods ***************/
  88
  89 classinfo *class_java_lang_Class;
  90 classinfo *class_java_lang_VMClass;
  91 classinfo *class_java_lang_System;
  92 classinfo *class_java_lang_ClassLoader;
  93 classinfo *class_gnu_java_lang_SystemClassLoader;
  94 classinfo *class_java_lang_SecurityManager;
  95 classinfo *class_java_lang_Double;
  96 classinfo *class_java_lang_Float;
  97 classinfo *class_java_lang_Long;
  98 classinfo *class_java_lang_Byte;
  99 classinfo *class_java_lang_Short;
 100 classinfo *class_java_lang_Boolean;
 101 classinfo *class_java_lang_Void;
 102 classinfo *class_java_lang_Character;
 103 classinfo *class_java_lang_Integer;
 104
 105 methodinfo *method_vmclass_init;
 106
 107
 108 /* the system classloader object */
 109 struct java_lang_ClassLoader *SystemClassLoader = NULL;
 110
 111 /* for raising exceptions from native methods */
 112 #if !defined(USE_THREADS) || !defined(NATIVE_THREADS)
 113 java_objectheader* _exceptionptr = NULL;
 114 #endif
 115
 116 /************* use classinfo structure as java.lang.Class object **************/
 117
 118 void use_class_as_object(classinfo *c)
 119 {
 120         if (!c->classvftbl) {
 121                 c->header.vftbl = class_java_lang_Class->vftbl;
 122                 c->classvftbl = true;
 123         }
 124
 125 }
 126
 127
 128 /************************** tables for methods ********************************/
 129
 130 #undef JOWENN_DEBUG
 131 #undef JOWENN_DEBUG1
 132
 133 #ifdef STATIC_CLASSPATH
 134 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 135
 136 /* table for fast string comparison */
 137 static nativecompref nativecomptable[NATIVETABLESIZE];
 138
 139 /* string comparsion table initialized */
 140 static bool nativecompdone = false;
 141 #endif
 142
 143
 144 /* XXX don't define this in a header file!!! */
 145
 146 static struct nativeCall nativeCalls[] =
 147 {
 148 #include "nativecalls.inc"
 149 };
 150
 151 #define NATIVECALLSSIZE    (sizeof(nativeCalls) / sizeof(struct nativeCall))
 152
 153 struct nativeCompCall nativeCompCalls[NATIVECALLSSIZE];
 154
 155 /******************************************************************************/
 156
 157 /**include "natcalls.h" **/
 158
 159
 160 /*********************** function: native_loadclasses **************************
 161
 162         load classes required for native methods
 163
 164 *******************************************************************************/
 165
 166 void native_loadclasses()
 167 {
 168         static int classesLoaded = 0; /*temporary hack JoWenn*/
 169
 170         if (classesLoaded)
 171                 return;
 172
 173         classesLoaded = 1;
 174
 175         class_java_lang_Cloneable =
 176                 class_new(utf_new_char("java/lang/Cloneable"));
 177         class_load(class_java_lang_Cloneable);
 178         class_link(class_java_lang_Cloneable);
 179
 180         class_java_lang_Class =
 181                 class_new(utf_new_char("java/lang/Class"));
 182         class_load(class_java_lang_Class);
 183         class_link(class_java_lang_Class);
 184
 185         class_java_lang_VMClass =
 186                 class_new(utf_new_char("java/lang/VMClass"));
 187         class_load(class_java_lang_VMClass);
 188         class_link(class_java_lang_VMClass);
 189
 190         class_java_lang_ClassLoader =
 191                 class_new(utf_new_char("java/lang/ClassLoader"));
 192         class_load(class_java_lang_ClassLoader);
 193         class_link(class_java_lang_ClassLoader);
 194
 195         /* load classes for wrapping primitive types */
 196         class_java_lang_Double = class_new(utf_new_char("java/lang/Double"));
 197         class_load(class_java_lang_Double);
 198         class_link(class_java_lang_Double);
 199
 200         class_java_lang_Float = class_new(utf_new_char("java/lang/Float"));
 201         class_load(class_java_lang_Float);
 202         class_link(class_java_lang_Float);
 203
 204         class_java_lang_Character =     class_new(utf_new_char("java/lang/Character"));
 205         class_load(class_java_lang_Character);
 206         class_link(class_java_lang_Character);
 207
 208         class_java_lang_Integer = class_new(utf_new_char("java/lang/Integer"));
 209         class_load(class_java_lang_Integer);
 210         class_link(class_java_lang_Integer);
 211
 212         class_java_lang_Long = class_new(utf_new_char("java/lang/Long"));
 213         class_load(class_java_lang_Long);
 214         class_link(class_java_lang_Long);
 215
 216         class_java_lang_Byte = class_new(utf_new_char("java/lang/Byte"));
 217         class_load(class_java_lang_Byte);
 218         class_link(class_java_lang_Byte);
 219
 220         class_java_lang_Short = class_new(utf_new_char("java/lang/Short"));
 221         class_load(class_java_lang_Short);
 222         class_link(class_java_lang_Short);
 223
 224         class_java_lang_Boolean = class_new(utf_new_char("java/lang/Boolean"));
 225         class_load(class_java_lang_Boolean);
 226         class_link(class_java_lang_Boolean);
 227
 228         class_java_lang_Void = class_new(utf_new_char("java/lang/Void"));
 229         class_load(class_java_lang_Void);
 230         class_link(class_java_lang_Void);
 231
 232 }
 233
 234
 235 /*****************************************************************************
 236
 237         create systemclassloader object and initialize instance fields
 238
 239 ******************************************************************************/
 240
 241 void init_systemclassloader()
 242 {
 243         log_text("init_systemclassloader");
 244         if (!SystemClassLoader) {
 245                 native_loadclasses();
 246                 log_text("Initializing new system class loader");
 247                 /* create object and call initializer */
 248                 SystemClassLoader = (java_lang_ClassLoader *) native_new_and_init(class_new(utf_new_char("gnu/java/lang/SystemClassLoader")));
 249
 250                 /* systemclassloader has no parent */
 251                 SystemClassLoader->parent      = NULL;
 252                 SystemClassLoader->initialized = true;
 253         }
 254         log_text("leaving system class loader");
 255 }
 256
 257
 258 /*********************** Function: native_findfunction *************************
 259
 260         Looks up a method (must have the same class name, method name, descriptor
 261         and 'static'ness) and returns a function pointer to it.
 262         Returns: function pointer or NULL (if there is no such method)
 263
 264         Remark: For faster operation, the names/descriptors are converted from C
 265                 strings to Unicode the first time this function is called.
 266
 267 *******************************************************************************/
 268
 269 functionptr native_findfunction(utf *cname, utf *mname,
 270                                                                 utf *desc, bool isstatic)
 271 {
 272 #ifdef STATIC_CLASSPATH
 273         int i;
 274         /* entry of table for fast string comparison */
 275         struct nativecompref *n;
 276         /* for warning message if no function is found */
 277         char *buffer;
 278         int buffer_len;
 279
 280         isstatic = isstatic ? true : false;
 281
 282         if (!nativecompdone) {
 283                 for (i = 0; i < NATIVETABLESIZE; i++) {
 284                         nativecomptable[i].classname  =
 285                                 utf_new_char(nativetable[i].classname);
 286                         nativecomptable[i].methodname =
 287                                 utf_new_char(nativetable[i].methodname);
 288                         nativecomptable[i].descriptor =
 289                                 utf_new_char(nativetable[i].descriptor);
 290                         nativecomptable[i].isstatic   =
 291                                 nativetable[i].isstatic;
 292                         nativecomptable[i].func       =
 293                                 nativetable[i].func;
 294                 }
 295                 nativecompdone = true;
 296         }
 297
 298 #ifdef JOWENN_DEBUG
 299         buffer_len =
 300                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 301
 302         buffer = MNEW(char, buffer_len);
 303
 304         strcpy(buffer, "searching matching function in native table:");
 305         utf_sprint(buffer+strlen(buffer), mname);
 306         strcpy(buffer+strlen(buffer), ": ");
 307         utf_sprint(buffer+strlen(buffer), desc);
 308         strcpy(buffer+strlen(buffer), " for class ");
 309         utf_sprint(buffer+strlen(buffer), cname);
 310
 311         log_text(buffer);
 312
 313         MFREE(buffer, char, buffer_len);
 314 #endif
 315
 316         for (i = 0; i < NATIVETABLESIZE; i++) {
 317                 n = &(nativecomptable[i]);
 318
 319                 if (cname == n->classname && mname == n->methodname &&
 320                     desc == n->descriptor && isstatic == n->isstatic)
 321                         return n->func;
 322 #ifdef JOWENN_DEBUG
 323                         else {
 324                                 if (cname == n->classname && mname == n->methodname )  log_text("static and descriptor mismatch");
 325
 326                                 else {
 327                                         buffer_len =
 328                                           utf_strlen(n->classname) + utf_strlen(n->methodname) + utf_strlen(n->descriptor) + 64;
 329
 330                                         buffer = MNEW(char, buffer_len);
 331
 332                                         strcpy(buffer, "comparing with:");
 333                                         utf_sprint(buffer+strlen(buffer), n->methodname);
 334                                         strcpy (buffer+strlen(buffer), ": ");
 335                                         utf_sprint(buffer+strlen(buffer), n->descriptor);
 336                                         strcpy(buffer+strlen(buffer), " for class ");
 337                                         utf_sprint(buffer+strlen(buffer), n->classname);
 338
 339                                         log_text(buffer);
 340
 341                                         MFREE(buffer, char, buffer_len);
 342                                 }
 343                         }
 344 #endif
 345         }
 346
 347
 348         /* no function was found, display warning */
 349
 350         buffer_len =
 351                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 352
 353         buffer = MNEW(char, buffer_len);
 354
 355         strcpy(buffer, "warning: native function ");
 356         utf_sprint(buffer + strlen(buffer), mname);
 357         strcpy(buffer + strlen(buffer), ": ");
 358         utf_sprint(buffer + strlen(buffer), desc);
 359         strcpy(buffer + strlen(buffer), " not found in class ");
 360         utf_sprint(buffer + strlen(buffer), cname);
 361
 362         log_text(buffer);
 363
 364         MFREE(buffer, char, buffer_len);
 365
 366 /*      exit(1); */
 367
 368         /* keep compiler happy */
 369         return NULL;
 370 #else
 371 /* dynamic classpath */
 372   return 0;
 373 #endif
 374 }
 375
 376
 377 /********************** function: javastring_new *******************************
 378
 379         creates a new object of type java/lang/String with the text of
 380         the specified utf8-string
 381
 382         return: pointer to the string or NULL if memory is exhausted.
 383
 384 *******************************************************************************/
 385
 386 java_lang_String *javastring_new(utf *u)
 387 {
 388         char *utf_ptr;                  /* current utf character in utf string    */
 389         u4 utflength;                   /* length of utf-string if uncompressed   */
 390         java_lang_String *s;                /* result-string                          */
 391         java_chararray *a;
 392         s4 i;
 393
 394         if (!u) {
 395                 *exceptionptr = new_nullpointerexception();
 396                 return NULL;
 397         }
 398
 399         utf_ptr = u->text;
 400         utflength = utf_strlen(u);
 401
 402         s = (java_lang_String *) builtin_new(class_java_lang_String);
 403         a = builtin_newarray_char(utflength);
 404
 405         /* javastring or character-array could not be created */
 406         if (!a || !s)
 407                 return NULL;
 408
 409         /* decompress utf-string */
 410         for (i = 0; i < utflength; i++)
 411                 a->data[i] = utf_nextu2(&utf_ptr);
 412
 413         /* set fields of the javastring-object */
 414         s->value  = a;
 415         s->offset = 0;
 416         s->count  = utflength;
 417
 418         return s;
 419 }
 420
 421
 422 /********************** function: javastring_new_char **************************
 423
 424         creates a new java/lang/String object which contains the convertet
 425         C-string passed via text.
 426
 427         return: the object pointer or NULL if memory is exhausted.
 428
 429 *******************************************************************************/
 430
 431 java_lang_String *javastring_new_char(char *text)
 432 {
 433         s4 i;
 434         s4 len;                /* length of the string */
 435         java_lang_String *s;   /* result-string */
 436         java_chararray *a;
 437
 438         if (!text) {
 439                 *exceptionptr = new_nullpointerexception();
 440                 return NULL;
 441         }
 442
 443         len = strlen(text);
 444
 445         s = (java_lang_String *) builtin_new(class_java_lang_String);
 446         a = builtin_newarray_char(len);
 447
 448         /* javastring or character-array could not be created */
 449         if (!a || !s)
 450                 return NULL;
 451
 452         /* copy text */
 453         for (i = 0; i < len; i++)
 454                 a->data[i] = text[i];
 455
 456         /* set fields of the javastring-object */
 457         s->value  = a;
 458         s->offset = 0;
 459         s->count  = len;
 460
 461         return s;
 462 }
 463
 464
 465 /************************* function javastring_tochar **************************
 466
 467         converts a Java string into a C string.
 468
 469         return: pointer to C string
 470
 471         Caution: every call of this function overwrites the previous string !!!
 472
 473 *******************************************************************************/
 474
 475 static char stringbuffer[MAXSTRINGSIZE];
 476
 477 char *javastring_tochar(java_objectheader *so)
 478 {
 479         java_lang_String *s = (java_lang_String *) so;
 480         java_chararray *a;
 481         s4 i;
 482
 483         if (!s)
 484                 return "";
 485
 486         a = s->value;
 487
 488         if (!a)
 489                 return "";
 490
 491         if (s->count > MAXSTRINGSIZE)
 492                 return "";
 493
 494         for (i = 0; i < s->count; i++)
 495                 stringbuffer[i] = a->data[s->offset + i];
 496
 497         stringbuffer[i] = '\0';
 498
 499         return stringbuffer;
 500 }
 501
 502
 503 /****************** function class_findfield_approx ****************************
 504
 505         searches in 'classinfo'-structure for a field with the
 506         specified name
 507
 508 *******************************************************************************/
 509
 510 fieldinfo *class_findfield_approx(classinfo *c, utf *name)
 511 {
 512         s4 i;
 513
 514         for (i = 0; i < c->fieldscount; i++) {
 515                 /* compare field names */
 516                 if ((c->fields[i].name == name))
 517                         return &(c->fields[i]);
 518         }
 519
 520         /* field was not found, raise exception */
 521         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 522
 523         return NULL;
 524 }
 525
 526
 527 s4 class_findfield_index_approx(classinfo *c, utf *name)
 528 {
 529         s4 i;
 530
 531         for (i = 0; i < c->fieldscount; i++) {
 532                 /* compare field names */
 533                 if ((c->fields[i].name == name))
 534                         return i;
 535         }
 536
 537         /* field was not found, raise exception */
 538         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 539
 540         return -1;
 541 }
 542
 543
 544 /********************** function: native_new_and_init *************************
 545
 546         Creates a new object on the heap and calls the initializer.
 547         Returns the object pointer or NULL if memory is exhausted.
 548
 549 *******************************************************************************/
 550
 551 java_objectheader *native_new_and_init(classinfo *c)
 552 {
 553         methodinfo *m;
 554         java_objectheader *o;
 555
 556         if (!c)
 557                 return *exceptionptr;
 558
 559         o = builtin_new(c);                 /* create object                      */
 560
 561         if (!o)
 562                 return NULL;
 563
 564         /* find initializer */
 565
 566         m = class_findmethod(c,
 567                                                  utf_new_char("<init>"),
 568                                                  utf_new_char("()V"));
 569
 570         if (!m) {                           /* initializer not found              */
 571                 if (opt_verbose) {
 572                         char logtext[MAXLOGTEXT];
 573                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 574                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 575                         log_text(logtext);
 576                 }
 577                 return o;
 578         }
 579
 580         /* call initializer */
 581
 582         asm_calljavafunction(m, o, NULL, NULL, NULL);
 583
 584         return o;
 585 }
 586
 587
 588 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
 589 {
 590         methodinfo *m;
 591         java_objectheader *o;
 592
 593         if (!c)
 594                 return *exceptionptr;
 595
 596         o = builtin_new(c);          /* create object          */
 597
 598         if (!o)
 599                 return NULL;
 600
 601         /* find initializer */
 602
 603         m = class_findmethod(c,
 604                                                  utf_new_char("<init>"),
 605                                                  utf_new_char("(Ljava/lang/String;)V"));
 606
 607         if (!m) {                                       /* initializer not found  */
 608                 if (opt_verbose) {
 609                         char logtext[MAXLOGTEXT];
 610                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 611                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 612                         log_text(logtext);
 613                 }
 614                 return o;
 615         }
 616
 617         /* call initializer */
 618
 619         asm_calljavafunction(m, o, s, NULL, NULL);
 620
 621         return o;
 622 }
 623
 624
 625 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
 626 {
 627         methodinfo *m;
 628         java_objectheader *o;
 629
 630         if (!c)
 631                 return *exceptionptr;
 632
 633         o = builtin_new(c);          /* create object          */
 634
 635         if (!o) return NULL;
 636
 637         /* find initializer */
 638
 639         m = class_findmethod(c,
 640                                                  utf_new_char("<init>"),
 641                                                  utf_new_char("(I)V"));
 642
 643         if (!m) {                                       /* initializer not found  */
 644                 if (opt_verbose) {
 645                         char logtext[MAXLOGTEXT];
 646                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 647                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 648                         log_text(logtext);
 649                 }
 650                 return o;
 651         }
 652
 653         /* call initializer */
 654
 655 #if defined(__I386__) || defined(__POWERPC__)
 656         asm_calljavafunction(m, o, (void *) i, NULL, NULL);
 657 #else
 658         asm_calljavafunction(m, o, (void *) (s8) i, NULL, NULL);
 659 #endif
 660
 661         return o;
 662 }
 663
 664
 665 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
 666 {
 667         methodinfo *m;
 668         java_objectheader *o;
 669
 670         if (!c)
 671                 return *exceptionptr;
 672
 673         o = builtin_new(c);          /* create object          */
 674
 675         if (!o) return NULL;
 676
 677         /* find initializer */
 678
 679         m = class_findmethod(c,
 680                                                  utf_new_char("<init>"),
 681                                                  utf_new_char("(Ljava/lang/Throwable;)V"));
 682
 683         if (!m) {                                       /* initializer not found  */
 684                 if (opt_verbose) {
 685                         char logtext[MAXLOGTEXT];
 686                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 687                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 688                         log_text(logtext);
 689                 }
 690                 return o;
 691         }
 692
 693         /* call initializer */
 694
 695         asm_calljavafunction(m, o, t, NULL, NULL);
 696
 697         return o;
 698 }
 699
 700
 701 /******************** function: stringtable_update ****************************
 702
 703         traverses the javastring hashtable and sets the vftbl-entries of
 704         javastrings which were temporarily set to NULL, because
 705         java.lang.Object was not yet loaded
 706
 707 *******************************************************************************/
 708
 709 void stringtable_update ()
 710 {
 711         java_lang_String *js;
 712         java_chararray *a;
 713         literalstring *s;       /* hashtable entry */
 714         int i;
 715
 716         for (i = 0; i < string_hash.size; i++) {
 717                 s = string_hash.ptr[i];
 718                 if (s) {
 719                         while (s) {
 720
 721                                 js = (java_lang_String *) s->string;
 722
 723                                 if (!js || !js->value)
 724                                         /* error in hashtable found */
 725                                         panic("invalid literalstring in hashtable");
 726
 727                                 a = js->value;
 728
 729                                 if (!js->header.vftbl)
 730                                         /* vftbl of javastring is NULL */
 731                                         js->header.vftbl = class_java_lang_String->vftbl;
 732
 733                                 if (!a->header.objheader.vftbl)
 734                                         /* vftbl of character-array is NULL */
 735                                         a->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 736
 737                                 /* follow link in external hash chain */
 738                                 s = s->hashlink;
 739                         }
 740                 }
 741         }
 742 }
 743
 744
 745 /************************* function: u2_utflength ***************************
 746
 747         returns the utf length in bytes of a u2 array
 748
 749 *****************************************************************************/
 750
 751 u4 u2_utflength(u2 *text, u4 u2_length)
 752 {
 753         u4 result_len =  0;  /* utf length in bytes  */
 754         u2 ch;               /* current unicode character */
 755         u4 len;
 756
 757         for (len = 0; len < u2_length; len++) {
 758                 /* next unicode character */
 759                 ch = *text++;
 760
 761                 /* determine bytes required to store unicode character as utf */
 762                 if (ch && (ch < 0x80))
 763                         result_len++;
 764                 else if (ch < 0x800)
 765                         result_len += 2;
 766                 else
 767                         result_len += 3;
 768         }
 769
 770     return result_len;
 771 }
 772
 773
 774 /********************* function: utf_new_u2 ***********************************
 775
 776         make utf symbol from u2 array,
 777         if isclassname is true '.' is replaced by '/'
 778
 779 *******************************************************************************/
 780
 781 utf *utf_new_u2(u2 *unicode_pos, u4 unicode_length, bool isclassname)
 782 {
 783         char *buffer; /* memory buffer for  unicode characters */
 784         char *pos;    /* pointer to current position in buffer */
 785         u4 left;      /* unicode characters left */
 786         u4 buflength; /* utf length in bytes of the u2 array  */
 787         utf *result;  /* resulting utf-string */
 788         int i;
 789
 790         /* determine utf length in bytes and allocate memory */
 791         /* printf("utf_new_u2: unicode_length=%d\n",unicode_length);            */
 792         buflength = u2_utflength(unicode_pos, unicode_length);
 793         buffer    = MNEW(char, buflength);
 794
 795         left = buflength;
 796         pos  = buffer;
 797
 798         for (i = 0; i++ < unicode_length; unicode_pos++) {
 799                 /* next unicode character */
 800                 u2 c = *unicode_pos;
 801
 802                 if ((c != 0) && (c < 0x80)) {
 803                         /* 1 character */
 804                         left--;
 805                 if ((int) left < 0) break;
 806                         /* convert classname */
 807                         if (isclassname && c == '.')
 808                                 *pos++ = '/';
 809                         else
 810                                 *pos++ = (char) c;
 811
 812                 } else if (c < 0x800) {
 813                         /* 2 characters */
 814                 unsigned char high = c >> 6;
 815                 unsigned char low  = c & 0x3F;
 816                         left = left - 2;
 817                 if ((int) left < 0) break;
 818                 *pos++ = high | 0xC0;
 819                 *pos++ = low  | 0x80;
 820
 821                 } else {
 822                 /* 3 characters */
 823                 char low  = c & 0x3f;
 824                 char mid  = (c >> 6) & 0x3F;
 825                 char high = c >> 12;
 826                         left = left - 3;
 827                 if ((int) left < 0) break;
 828                 *pos++ = high | 0xE0;
 829                 *pos++ = mid  | 0x80;
 830                 *pos++ = low  | 0x80;
 831                 }
 832         }
 833
 834         /* insert utf-string into symbol-table */
 835         result = utf_new(buffer,buflength);
 836
 837         MFREE(buffer, char, buflength);
 838
 839         return result;
 840 }
 841
 842
 843 /********************* function: javastring_toutf *****************************
 844
 845         make utf symbol from javastring
 846
 847 *******************************************************************************/
 848
 849 utf *javastring_toutf(java_lang_String *string, bool isclassname)
 850 {
 851         java_lang_String *str = (java_lang_String *) string;
 852
 853 /*      printf("javastring_toutf offset: %d, len %d\n",str->offset, str->count); */
 854 /*      fflush(stdout); */
 855
 856         return utf_new_u2(str->value->data + str->offset, str->count, isclassname);
 857 }
 858
 859
 860 /********************* function: literalstring_u2 *****************************
 861
 862     searches for the javastring with the specified u2-array in
 863     the string hashtable, if there is no such string a new one is
 864     created
 865
 866     if copymode is true a copy of the u2-array is made
 867
 868 *******************************************************************************/
 869
 870 java_objectheader *literalstring_u2(java_chararray *a, u4 length, u4 offset,
 871                                                                         bool copymode)
 872 {
 873     literalstring *s;                /* hashtable element */
 874     java_lang_String *js;            /* u2-array wrapped in javastring */
 875     java_chararray *stringdata;      /* copy of u2-array */
 876     u4 key;
 877     u4 slot;
 878     u2 i;
 879
 880 /* #define DEBUG_LITERALSTRING_U2 */
 881 #ifdef DEBUG_LITERALSTRING_U2
 882     printf("literalstring_u2: length=%d, offset=%d\n", length, offset);
 883         fflush(stdout);
 884 #endif
 885
 886     /* find location in hashtable */
 887     key  = unicode_hashkey(a->data + offset, length);
 888     slot = key & (string_hash.size - 1);
 889     s    = string_hash.ptr[slot];
 890
 891     while (s) {
 892                 js = (java_lang_String *) s->string;
 893
 894                 if (length == js->count) {
 895                         /* compare text */
 896                         for (i = 0; i < length; i++) {
 897                                 if (a->data[offset + i] != js->value->data[i])
 898                                         goto nomatch;
 899                         }
 900
 901                         /* string already in hashtable, free memory */
 902                         if (!copymode)
 903                                 mem_free(a, sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10);
 904
 905 #ifdef DEBUG_LITERALSTRING_U2
 906                         printf("literalstring_u2: foundentry at %p\n", js);
 907                         utf_display(javastring_toutf(js, 0));
 908                         printf("\n\n");
 909                         fflush(stdout);
 910 #endif
 911                         return (java_objectheader *) js;
 912                 }
 913
 914         nomatch:
 915                 /* follow link in external hash chain */
 916                 s = s->hashlink;
 917     }
 918
 919     if (copymode) {
 920                 /* create copy of u2-array for new javastring */
 921                 u4 arraysize = sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10;
 922                 stringdata = mem_alloc(arraysize);
 923 /*              memcpy(stringdata, a, arraysize); */
 924                 memcpy(&(stringdata->header), &(a->header), sizeof(java_arrayheader));
 925                 memcpy(&(stringdata->data), &(a->data) + offset, sizeof(u2) * (length - 1) + 10);
 926
 927     } else {
 928                 stringdata = a;
 929         }
 930
 931     /* location in hashtable found, complete arrayheader */
 932     stringdata->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 933     stringdata->header.size = length;
 934
 935         /* if we use eager loading, we have to check loaded String class */
 936         if (opt_eager) {
 937                 class_java_lang_String =
 938                         class_new_intern(utf_new_char("java/lang/String"));
 939
 940                 if (!class_load(class_java_lang_String))
 941                         return NULL;
 942
 943                 list_addfirst(&unlinkedclasses, class_java_lang_String);
 944         }
 945
 946         /* create new javastring */
 947         js = NEW(java_lang_String);
 948 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
 949         initObjectLock(&js->header);
 950 #endif
 951         js->header.vftbl = class_java_lang_String->vftbl;
 952         js->value  = stringdata;
 953         js->offset = 0;
 954         js->count  = length;
 955
 956 #ifdef DEBUG_LITERALSTRING_U2
 957         printf("literalstring_u2: newly created at %p\n", js);
 958         utf_display(javastring_toutf(js, 0));
 959         printf("\n\n");
 960         fflush(stdout);
 961 #endif
 962
 963         /* create new literalstring */
 964         s = NEW(literalstring);
 965         s->hashlink = string_hash.ptr[slot];
 966         s->string   = (java_objectheader *) js;
 967         string_hash.ptr[slot] = s;
 968
 969         /* update number of hashtable entries */
 970         string_hash.entries++;
 971
 972         /* reorganization of hashtable */
 973         if (string_hash.entries > (string_hash.size * 2)) {
 974                 /* reorganization of hashtable, average length of
 975                    the external chains is approx. 2                */
 976
 977                 u4 i;
 978                 literalstring *s;
 979                 hashtable newhash; /* the new hashtable */
 980
 981                 /* create new hashtable, double the size */
 982                 init_hashtable(&newhash, string_hash.size * 2);
 983                 newhash.entries = string_hash.entries;
 984
 985                 /* transfer elements to new hashtable */
 986                 for (i = 0; i < string_hash.size; i++) {
 987                         s = string_hash.ptr[i];
 988                         while (s) {
 989                                 literalstring *nexts = s->hashlink;
 990                                 js   = (java_lang_String *) s->string;
 991                                 slot = unicode_hashkey(js->value->data, js->count) & (newhash.size - 1);
 992
 993                                 s->hashlink = newhash.ptr[slot];
 994                                 newhash.ptr[slot] = s;
 995
 996                                 /* follow link in external hash chain */
 997                                 s = nexts;
 998                         }
 999                 }
1000
1001                 /* dispose old table */
1002                 MFREE(string_hash.ptr, void*, string_hash.size);
1003                 string_hash = newhash;
1004         }
1005
1006         return (java_objectheader *) js;
1007 }
1008
1009
1010 /******************** Function: literalstring_new *****************************
1011
1012     creates a new javastring with the text of the utf-symbol
1013     and inserts it into the string hashtable
1014
1015 *******************************************************************************/
1016
1017 java_objectheader *literalstring_new(utf *u)
1018 {
1019     char *utf_ptr = u->text;         /* pointer to current unicode character in utf string */
1020     u4 utflength  = utf_strlen(u);   /* length of utf-string if uncompressed */
1021     java_chararray *a;               /* u2-array constructed from utf string */
1022     u4 i;
1023
1024     /* allocate memory */
1025     a = mem_alloc(sizeof(java_chararray) + sizeof(u2) * (utflength - 1) + 10);
1026
1027     /* convert utf-string to u2-array */
1028     for (i = 0; i < utflength; i++)
1029                 a->data[i] = utf_nextu2(&utf_ptr);
1030
1031     return literalstring_u2(a, utflength, 0, false);
1032 }
1033
1034
1035 /********************** function: literalstring_free **************************
1036
1037         removes a javastring from memory
1038
1039 ******************************************************************************/
1040
1041 void literalstring_free(java_objectheader* sobj)
1042 {
1043         java_lang_String *s = (java_lang_String *) sobj;
1044         java_chararray *a = s->value;
1045
1046         /* dispose memory of java.lang.String object */
1047         FREE(s, java_lang_String);
1048
1049         /* dispose memory of java-characterarray */
1050         FREE(a, sizeof(java_chararray) + sizeof(u2) * (a->header.size - 1)); /* +10 ?? */
1051 }
1052
1053
1054 void copy_vftbl(vftbl_t **dest, vftbl_t *src)
1055 {
1056     *dest = src;
1057 #if 0
1058     /* XXX this kind of copying does not work (in the general
1059      * case). The interface tables would have to be copied, too. I
1060      * don't see why we should make a copy anyway. -Edwin
1061      */
1062         *dest = mem_alloc(sizeof(vftbl) + sizeof(methodptr)*(src->vftbllength-1));
1063         memcpy(*dest, src, sizeof(vftbl) - sizeof(methodptr));
1064         memcpy(&(*dest)->table, &src->table, src->vftbllength * sizeof(methodptr));
1065 #endif
1066 }
1067
1068
1069 /******************************************************************************************
1070
1071         creates method signature (excluding return type) from array of
1072         class-objects representing the parameters of the method
1073
1074 *******************************************************************************************/
1075
1076
1077 utf *create_methodsig(java_objectarray* types, char *retType)
1078 {
1079     char *buffer;       /* buffer for building the desciptor */
1080     char *pos;          /* current position in buffer */
1081     utf *result;        /* the method signature */
1082     u4 buffer_size = 3; /* minimal size=3: room for parenthesis and returntype */
1083     u4 i, j;
1084
1085     if (!types) return NULL;
1086
1087     /* determine required buffer-size */
1088     for (i = 0; i < types->header.size; i++) {
1089                 classinfo *c = (classinfo *) types->data[i];
1090                 buffer_size  = buffer_size + c->name->blength + 2;
1091     }
1092
1093     if (retType) buffer_size += strlen(retType);
1094
1095     /* allocate buffer */
1096     buffer = MNEW(char, buffer_size);
1097     pos    = buffer;
1098
1099     /* method-desciptor starts with parenthesis */
1100     *pos++ = '(';
1101
1102     for (i = 0; i < types->header.size; i++) {
1103                 char ch;
1104
1105                 /* current argument */
1106             classinfo *c = (classinfo *) types->data[i];
1107
1108             /* current position in utf-text */
1109             char *utf_ptr = c->name->text;
1110
1111             /* determine type of argument */
1112             if ((ch = utf_nextu2(&utf_ptr)) == '[') {
1113                 /* arrayclass */
1114                 for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1115                                 *pos++ = *utf_ptr; /* copy text */
1116                         }
1117
1118             } else {
1119                         /* check for primitive types */
1120                         for (j = 0; j < PRIMITIVETYPE_COUNT; j++) {
1121                                 char *utf_pos   = utf_ptr - 1;
1122                                 char *primitive = primitivetype_table[j].wrapname;
1123
1124                                 /* compare text */
1125                                 while (utf_pos < utf_end(c->name)) {
1126                                         if (*utf_pos++ != *primitive++) goto nomatch;
1127                                 }
1128
1129                                 /* primitive type found */
1130                                 *pos++ = primitivetype_table[j].typesig;
1131                                 goto next_type;
1132
1133                         nomatch:
1134                                 ;
1135                         }
1136
1137                         /* no primitive type and no arrayclass, so must be object */
1138                         *pos++ = 'L';
1139
1140                         /* copy text */
1141                         for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1142                                 *pos++ = *utf_ptr;
1143                         }
1144
1145                         *pos++ = ';';
1146
1147                 next_type:
1148                         ;
1149                 }
1150     }
1151
1152     *pos++ = ')';
1153
1154     if (retType) {
1155                 for (i = 0; i < strlen(retType); i++) {
1156                         *pos++ = retType[i];
1157                 }
1158     }
1159
1160     /* create utf-string */
1161     result = utf_new(buffer, (pos - buffer));
1162     MFREE(buffer, char, buffer_size);
1163
1164     return result;
1165 }
1166
1167
1168 /******************************************************************************************
1169
1170         retrieve the next argument or returntype from a descriptor
1171         and return the corresponding class
1172
1173 *******************************************************************************************/
1174
1175 classinfo *get_type(char **utf_ptr,char *desc_end, bool skip)
1176 {
1177     classinfo *c = class_from_descriptor(*utf_ptr,desc_end,utf_ptr,
1178                                          (skip) ? CLASSLOAD_SKIP : CLASSLOAD_LOAD);
1179     if (!c)
1180         /* unknown type */
1181         panic("illegal descriptor");
1182
1183     if (skip) return NULL;
1184
1185     use_class_as_object(c);
1186     return c;
1187 }
1188
1189
1190 /* get_parametertypes **********************************************************
1191
1192    use the descriptor of a method to generate a java/lang/Class array
1193    which contains the classes of the parametertypes of the method
1194
1195 *******************************************************************************/
1196
1197 java_objectarray* get_parametertypes(methodinfo *m)
1198 {
1199     utf  *descr    =  m->descriptor;    /* method-descriptor */
1200     char *utf_ptr  =  descr->text;      /* current position in utf-text */
1201     char *desc_end =  utf_end(descr);   /* points behind utf string     */
1202     java_objectarray* result;
1203     int parametercount = 0;
1204     int i;
1205
1206     /* skip '(' */
1207     utf_nextu2(&utf_ptr);
1208
1209     /* determine number of parameters */
1210     while (*utf_ptr != ')') {
1211         get_type(&utf_ptr, desc_end, true);
1212                 parametercount++;
1213     }
1214
1215     /* create class-array */
1216     result = builtin_anewarray(parametercount, class_java_lang_Class);
1217
1218     utf_ptr = descr->text;
1219     utf_nextu2(&utf_ptr);
1220
1221     /* get returntype classes */
1222     for (i = 0; i < parametercount; i++)
1223             result->data[i] =
1224                         (java_objectheader *) get_type(&utf_ptr, desc_end, false);
1225
1226     return result;
1227 }
1228
1229
1230 /* get_exceptiontypes **********************************************************
1231
1232    get the exceptions which can be thrown by a method
1233
1234 *******************************************************************************/
1235
1236 java_objectarray* get_exceptiontypes(methodinfo *m)
1237 {
1238     u2 excount;
1239     u2 i;
1240     java_objectarray *result;
1241
1242         excount = m->thrownexceptionscount;
1243
1244     /* create class-array */
1245     result = builtin_anewarray(excount, class_java_lang_Class);
1246
1247     for (i = 0; i < excount; i++) {
1248                 java_objectheader *o = (java_objectheader *) (m->thrownexceptions[i]);
1249                 use_class_as_object((classinfo *) o);
1250                 result->data[i] = o;
1251     }
1252
1253     return result;
1254 }
1255
1256
1257
1258
1259
1260 /******************************************************************************************
1261
1262         get the returntype class of a method
1263
1264 *******************************************************************************************/
1265
1266 classinfo *get_returntype(methodinfo *m)
1267 {
1268         char *utf_ptr;   /* current position in utf-text */
1269         char *desc_end;  /* points behind utf string     */
1270         utf *desc = m->descriptor; /* method-descriptor  */
1271
1272         utf_ptr  = desc->text;
1273         desc_end = utf_end(desc);
1274
1275         /* ignore parametertypes */
1276         while ((utf_ptr<desc_end) && utf_nextu2(&utf_ptr)!=')')
1277                 /* skip */ ;
1278
1279         return get_type(&utf_ptr,desc_end, false);
1280 }
1281
1282
1283 /*****************************************************************************/
1284 /*****************************************************************************/
1285
1286
1287 /*--------------------------------------------------------*/
1288 void printNativeCall(nativeCall nc) {
1289   int i,j;
1290
1291   printf("\n%s's Native Methods call:\n",nc.classname); fflush(stdout);
1292   for (i=0; i<nc.methCnt; i++) {
1293       printf("\tMethod=%s %s\n",nc.methods[i].methodname, nc.methods[i].descriptor);fflush(stdout);
1294
1295     for (j=0; j<nc.callCnt[i]; j++) {
1296         printf("\t\t<%i,%i>aCalled = %s %s %s\n",i,j,
1297         nc.methods[i].methodCalls[j].classname,
1298         nc.methods[i].methodCalls[j].methodname,
1299         nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1300       }
1301     }
1302   printf("-+++++--------------------\n");fflush(stdout);
1303 }
1304
1305 /*--------------------------------------------------------*/
1306 void printCompNativeCall(nativeCompCall nc) {
1307   int i,j;
1308   printf("printCompNativeCall BEGIN\n");fflush(stdout);
1309   printf("\n%s's Native Comp Methods call:\n",nc.classname->text);fflush(stdout);
1310   utf_display(nc.classname); fflush(stdout);
1311
1312   for (i=0; i<nc.methCnt; i++) {
1313     printf("\tMethod=%s %s\n",nc.methods[i].methodname->text,nc.methods[i].descriptor->text);fflush(stdout);
1314     utf_display(nc.methods[i].methodname); fflush(stdout);
1315     utf_display(nc.methods[i].descriptor);fflush(stdout);
1316     printf("\n");fflush(stdout);
1317
1318     for (j=0; j<nc.callCnt[i]; j++) {
1319       printf("\t\t<%i,%i>bCalled = ",i,j);fflush(stdout);
1320         utf_display(nc.methods[i].methodCalls[j].classname);fflush(stdout);
1321         utf_display(nc.methods[i].methodCalls[j].methodname); fflush(stdout);
1322         utf_display(nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1323         printf("\n");fflush(stdout);
1324       }
1325     }
1326 printf("---------------------\n");fflush(stdout);
1327 }
1328
1329
1330 /*--------------------------------------------------------*/
1331 classMeth findNativeMethodCalls(utf *c, utf *m, utf *d )
1332 {
1333     int i = 0;
1334     int j = 0;
1335     int cnt = 0;
1336     classMeth mc;
1337     mc.i_class = i;
1338     mc.j_method = j;
1339     mc.methCnt = cnt;
1340
1341     return mc;
1342 }
1343
1344 /*--------------------------------------------------------*/
1345 nativeCall* findNativeClassCalls(char *aclassname ) {
1346 int i;
1347
1348 for (i=0;i<NATIVECALLSSIZE; i++) {
1349    /* convert table to utf later to speed up search */
1350    if (strcmp(nativeCalls[i].classname, aclassname) == 0)
1351         return &nativeCalls[i];
1352    }
1353
1354 return NULL;
1355 }
1356 /*--------------------------------------------------------*/
1357 /*--------------------------------------------------------*/
1358 void utfNativeCall(nativeCall nc, nativeCompCall *ncc) {
1359   int i,j;
1360
1361
1362   ncc->classname = utf_new_char(nc.classname);
1363   ncc->methCnt = nc.methCnt;
1364
1365   for (i=0; i<nc.methCnt; i++) {
1366     ncc->methods[i].methodname = utf_new_char(nc.methods[i].methodname);
1367     ncc->methods[i].descriptor = utf_new_char(nc.methods[i].descriptor);
1368     ncc->callCnt[i] = nc.callCnt[i];
1369
1370     for (j=0; j<nc.callCnt[i]; j++) {
1371
1372         ncc->methods[i].methodCalls[j].classname  = utf_new_char(nc.methods[i].methodCalls[j].classname);
1373
1374         if (strcmp("", nc.methods[i].methodCalls[j].methodname) != 0) {
1375           ncc->methods[i].methodCalls[j].methodname = utf_new_char(nc.methods[i].methodCalls[j].methodname);
1376           ncc->methods[i].methodCalls[j].descriptor = utf_new_char(nc.methods[i].methodCalls[j].descriptor);
1377           }
1378         else {
1379           ncc->methods[i].methodCalls[j].methodname = NULL;
1380           ncc->methods[i].methodCalls[j].descriptor = NULL;
1381           }
1382       }
1383     }
1384 }
1385
1386
1387
1388 /*--------------------------------------------------------*/
1389
1390 bool natcall2utf(bool natcallcompdone) {
1391 int i;
1392
1393 if (natcallcompdone)
1394         return true;
1395
1396 for (i=0;i<NATIVECALLSSIZE; i++) {
1397    utfNativeCall  (nativeCalls[i], &nativeCompCalls[i]);
1398    }
1399
1400 return true;
1401 }
1402
1403 /*--------------------------------------------------------*/
1404
1405
1406 java_objectarray *builtin_asm_createclasscontextarray(classinfo **end, classinfo **start)
1407 {
1408 #if defined(__GNUC__)
1409 #warning platform dependend
1410 #endif
1411         java_objectarray *tmpArray;
1412         int i;
1413         classinfo **current;
1414         classinfo *c;
1415         size_t size;
1416
1417         size = (((size_t) start) - ((size_t) end)) / sizeof(classinfo*);
1418
1419         /*printf("end %p, start %p, size %ld\n",end,start,size);*/
1420         if (!class_java_lang_Class)
1421                 class_java_lang_Class = class_new(utf_new_char("java/lang/Class"));
1422
1423         if (!class_java_lang_SecurityManager)
1424                 class_java_lang_SecurityManager =
1425                         class_new(utf_new_char("java/lang/SecurityManager"));
1426
1427         if (size > 0) {
1428                 if (start == class_java_lang_SecurityManager) {
1429                         size--;
1430                         start--;
1431                 }
1432         }
1433
1434         tmpArray =
1435                 builtin_newarray(size, class_array_of(class_java_lang_Class)->vftbl);
1436
1437         for(i = 0, current = start; i < size; i++, current--) {
1438                 c = *current;
1439                 /*              printf("%d\n",i);
1440                 utf_display(c->name);*/
1441                 use_class_as_object(c);
1442                 tmpArray->data[i] = (java_objectheader *) c;
1443         }
1444
1445         return tmpArray;
1446 }
1447
1448
1449 java_lang_ClassLoader *builtin_asm_getclassloader(classinfo **end, classinfo **start)
1450 {
1451 #if defined(__GNUC__)
1452 #warning platform dependend
1453 #endif
1454         int i;
1455         classinfo **current;
1456         classinfo *c;
1457         classinfo *privilegedAction;
1458         size_t size;
1459
1460         size = (((size_t) start) - ((size_t) end)) / sizeof(classinfo*);
1461
1462         /*      log_text("builtin_asm_getclassloader");
1463         printf("end %p, start %p, size %ld\n",end,start,size);*/
1464
1465         if (!class_java_lang_SecurityManager)
1466                 class_java_lang_SecurityManager =
1467                         class_new(utf_new_char("java/lang/SecurityManager"));
1468
1469         if (size > 0) {
1470                 if (start == class_java_lang_SecurityManager) {
1471                         size--;
1472                         start--;
1473                 }
1474         }
1475
1476         privilegedAction=class_new(utf_new_char("java/security/PrivilegedAction"));
1477
1478         for(i = 0, current = start; i < size; i++, current--) {
1479                 c = *current;
1480
1481                 if (c == privilegedAction)
1482                         return NULL;
1483
1484                 if (c->classloader)
1485                         return (java_lang_ClassLoader *) c->classloader;
1486         }
1487
1488         return NULL;
1489
1490         /*
1491         log_text("Java_java_lang_VMSecurityManager_currentClassLoader");
1492         init_systemclassloader();
1493
1494         return SystemClassLoader;*/
1495 }
1496
1497
1498 /*
1499  * These are local overrides for various environment variables in Emacs.
1500  * Please do not remove this and leave it at the end of the file, where
1501  * Emacs will automagically detect them.
1502  * ---------------------------------------------------------------------
1503  * Local variables:
1504  * mode: c
1505  * indent-tabs-mode: t
1506  * c-basic-offset: 4
1507  * tab-width: 4
1508  * End:
1509  */