src/native/native.c

   1 /* src/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    Changes: Christian Thalinger
  32
  33    $Id: native.c 2891 2005-07-04 20:31:45Z twisti $
  34
  35 */
  36
  37
  38 #include <assert.h>
  39
  40 #if !defined(ENABLE_STATICVM)
  41 # include "libltdl/ltdl.h"
  42 #endif
  43
  44 #include "config.h"
  45 #include "types.h"
  46 #include "cacao/cacao.h"
  47 #include "mm/memory.h"
  48 #include "native/jni.h"
  49 #include "native/native.h"
  50 #include "native/include/java_lang_Throwable.h"
  51 #include "toolbox/logging.h"
  52 #include "vm/builtin.h"
  53 #include "vm/exceptions.h"
  54 #include "vm/global.h"
  55 #include "vm/loader.h"
  56 #include "vm/options.h"
  57 #include "vm/resolve.h"
  58 #include "vm/stringlocal.h"
  59 #include "vm/tables.h"
  60 #include "vm/jit/asmpart.h"
  61 #include "vm/jit/jit.h"
  62
  63
  64 /* include table of native functions ******************************************/
  65
  66 #include "native/include/java_lang_Cloneable.h"
  67 #include "native/include/java_util_Properties.h"
  68 #include "native/include/java_io_InputStream.h"
  69 #include "native/include/java_io_PrintStream.h"
  70
  71 #include "native/include/gnu_classpath_VMStackWalker.h"
  72 #include "native/include/gnu_classpath_VMSystemProperties.h"
  73 #include "native/include/java_lang_Class.h"
  74 #include "native/include/java_lang_Object.h"
  75 #include "native/include/java_lang_VMClass.h"
  76 #include "native/include/java_lang_VMClassLoader.h"
  77 #include "native/include/java_lang_VMObject.h"
  78 #include "native/include/java_lang_VMRuntime.h"
  79 #include "native/include/java_lang_VMString.h"
  80 #include "native/include/java_lang_VMSystem.h"
  81 #include "native/include/java_lang_VMThread.h"
  82 #include "native/include/java_lang_VMThrowable.h"
  83 #include "native/include/java_lang_reflect_Constructor.h"
  84 #include "native/include/java_lang_reflect_Field.h"
  85 #include "native/include/java_lang_reflect_Proxy.h"
  86 #include "native/include/java_lang_reflect_Method.h"
  87 #include "native/include/java_security_VMAccessController.h"
  88
  89 #if defined(ENABLE_STATICVM)
  90
  91 /* these are required to prevent compiler warnings */
  92
  93 #include "native/include/java_net_DatagramPacket.h"
  94 #include "native/include/java_net_InetAddress.h"
  95 #include "native/include/java_net_SocketImpl.h"
  96
  97 #include "native/include/gnu_java_net_PlainDatagramSocketImpl.h"
  98 #include "native/include/gnu_java_net_PlainSocketImpl.h"
  99 #include "native/include/gnu_java_nio_PipeImpl.h"
 100 #include "native/include/gnu_java_nio_channels_FileChannelImpl.h"
 101 #include "native/include/gnu_java_nio_charset_iconv_IconvEncoder.h"
 102 #include "native/include/gnu_java_nio_charset_iconv_IconvDecoder.h"
 103 #include "native/include/java_lang_VMProcess.h"
 104 #include "native/include/java_nio_MappedByteBufferImpl.h"
 105 #include "native/include/java_nio_channels_spi_SelectorProvider.h"
 106
 107 /* now include the native table */
 108
 109 #include "native/nativetable.inc"
 110
 111 #else /* defined(ENABLE_STATICVM) */
 112
 113 /* Ensure that symbols for functions implemented within CACAO are used and    */
 114 /* exported to dlopen.                                                        */
 115
 116 static functionptr dummynativetable[] = {
 117         (functionptr) Java_gnu_classpath_VMStackWalker_getClassContext,
 118
 119         (functionptr) Java_gnu_classpath_VMSystemProperties_preInit,
 120
 121         (functionptr) Java_java_lang_VMClass_isInstance,
 122         (functionptr) Java_java_lang_VMClass_isAssignableFrom,
 123         (functionptr) Java_java_lang_VMClass_isInterface,
 124         (functionptr) Java_java_lang_VMClass_isPrimitive,
 125         (functionptr) Java_java_lang_VMClass_getName,
 126         (functionptr) Java_java_lang_VMClass_getSuperclass,
 127         (functionptr) Java_java_lang_VMClass_getInterfaces,
 128         (functionptr) Java_java_lang_VMClass_getComponentType,
 129         (functionptr) Java_java_lang_VMClass_getModifiers,
 130         (functionptr) Java_java_lang_VMClass_getDeclaringClass,
 131         (functionptr) Java_java_lang_VMClass_getDeclaredClasses,
 132         (functionptr) Java_java_lang_VMClass_getDeclaredFields,
 133         (functionptr) Java_java_lang_VMClass_getDeclaredMethods,
 134         (functionptr) Java_java_lang_VMClass_getDeclaredConstructors,
 135         (functionptr) Java_java_lang_VMClass_getClassLoader,
 136         (functionptr) Java_java_lang_VMClass_forName,
 137         (functionptr) Java_java_lang_VMClass_isArray,
 138         (functionptr) Java_java_lang_VMClass_initialize,
 139         (functionptr) Java_java_lang_VMClass_loadArrayClass,
 140         (functionptr) Java_java_lang_VMClass_throwException,
 141
 142         (functionptr) Java_java_lang_VMClassLoader_defineClass,
 143         (functionptr) Java_java_lang_VMClassLoader_resolveClass,
 144         (functionptr) Java_java_lang_VMClassLoader_loadClass,
 145         (functionptr) Java_java_lang_VMClassLoader_getPrimitiveClass,
 146         (functionptr) Java_java_lang_VMClassLoader_nativeGetResources,
 147
 148         (functionptr) Java_java_lang_VMObject_getClass,
 149         (functionptr) Java_java_lang_VMObject_clone,
 150         (functionptr) Java_java_lang_VMObject_notify,
 151         (functionptr) Java_java_lang_VMObject_notifyAll,
 152         (functionptr) Java_java_lang_VMObject_wait,
 153
 154         (functionptr) Java_java_lang_VMRuntime_availableProcessors,
 155         (functionptr) Java_java_lang_VMRuntime_freeMemory,
 156         (functionptr) Java_java_lang_VMRuntime_totalMemory,
 157         (functionptr) Java_java_lang_VMRuntime_maxMemory,
 158         (functionptr) Java_java_lang_VMRuntime_gc,
 159         (functionptr) Java_java_lang_VMRuntime_runFinalization,
 160         (functionptr) Java_java_lang_VMRuntime_runFinalizationForExit,
 161         (functionptr) Java_java_lang_VMRuntime_traceInstructions,
 162         (functionptr) Java_java_lang_VMRuntime_traceMethodCalls,
 163         (functionptr) Java_java_lang_VMRuntime_runFinalizersOnExit,
 164         (functionptr) Java_java_lang_VMRuntime_exit,
 165         (functionptr) Java_java_lang_VMRuntime_nativeLoad,
 166         (functionptr) Java_java_lang_VMRuntime_mapLibraryName,
 167
 168         (functionptr) Java_java_lang_VMString_intern,
 169
 170         (functionptr) Java_java_lang_VMSystem_arraycopy,
 171         (functionptr) Java_java_lang_VMSystem_identityHashCode,
 172
 173         (functionptr) Java_java_lang_VMThread_start,
 174         (functionptr) Java_java_lang_VMThread_interrupt,
 175         (functionptr) Java_java_lang_VMThread_isInterrupted,
 176         (functionptr) Java_java_lang_VMThread_suspend,
 177         (functionptr) Java_java_lang_VMThread_resume,
 178         (functionptr) Java_java_lang_VMThread_nativeSetPriority,
 179         (functionptr) Java_java_lang_VMThread_nativeStop,
 180         (functionptr) Java_java_lang_VMThread_currentThread,
 181         (functionptr) Java_java_lang_VMThread_yield,
 182         (functionptr) Java_java_lang_VMThread_interrupted,
 183         (functionptr) Java_java_lang_VMThread_holdsLock,
 184
 185         (functionptr) Java_java_lang_VMThrowable_fillInStackTrace,
 186         (functionptr) Java_java_lang_VMThrowable_getStackTrace,
 187
 188         (functionptr) Java_java_lang_reflect_Constructor_getModifiers,
 189         (functionptr) Java_java_lang_reflect_Constructor_constructNative,
 190
 191         (functionptr) Java_java_lang_reflect_Field_getModifiers,
 192         (functionptr) Java_java_lang_reflect_Field_getType,
 193         (functionptr) Java_java_lang_reflect_Field_get,
 194         (functionptr) Java_java_lang_reflect_Field_getBoolean,
 195         (functionptr) Java_java_lang_reflect_Field_getByte,
 196         (functionptr) Java_java_lang_reflect_Field_getChar,
 197         (functionptr) Java_java_lang_reflect_Field_getShort,
 198         (functionptr) Java_java_lang_reflect_Field_getInt,
 199         (functionptr) Java_java_lang_reflect_Field_getLong,
 200         (functionptr) Java_java_lang_reflect_Field_getFloat,
 201         (functionptr) Java_java_lang_reflect_Field_getDouble,
 202         (functionptr) Java_java_lang_reflect_Field_set,
 203         (functionptr) Java_java_lang_reflect_Field_setBoolean,
 204         (functionptr) Java_java_lang_reflect_Field_setByte,
 205         (functionptr) Java_java_lang_reflect_Field_setChar,
 206         (functionptr) Java_java_lang_reflect_Field_setShort,
 207         (functionptr) Java_java_lang_reflect_Field_setInt,
 208         (functionptr) Java_java_lang_reflect_Field_setLong,
 209         (functionptr) Java_java_lang_reflect_Field_setFloat,
 210         (functionptr) Java_java_lang_reflect_Field_setDouble,
 211
 212         (functionptr) Java_java_lang_reflect_Proxy_getProxyClass0,
 213         (functionptr) Java_java_lang_reflect_Proxy_getProxyData0,
 214         (functionptr) Java_java_lang_reflect_Proxy_generateProxyClass0,
 215
 216         (functionptr) Java_java_lang_reflect_Method_getModifiers,
 217         (functionptr) Java_java_lang_reflect_Method_getReturnType,
 218         (functionptr) Java_java_lang_reflect_Method_getParameterTypes,
 219         (functionptr) Java_java_lang_reflect_Method_getExceptionTypes,
 220         (functionptr) Java_java_lang_reflect_Method_invokeNative,
 221
 222         (functionptr) Java_java_security_VMAccessController_getStack,
 223 };
 224
 225 #endif /* defined(ENABLE_STATICVM) */
 226
 227
 228 /************* use classinfo structure as java.lang.Class object **************/
 229
 230 bool use_class_as_object(classinfo *c)
 231 {
 232         if (!c->classvftbl) {
 233                 /* is the class loaded */
 234                 if (!c->loaded) {
 235 /*                      if (!class_load(c)) */
 236 /*                              throw_exception_exit(); */
 237                         log_text("use_class_as_object: class_load should not happen");
 238                         assert(0);
 239                 }
 240
 241                 /* is the class linked */
 242                 if (!c->linked)
 243                         if (!link_class(c))
 244                                 return false;
 245
 246                 assert(class_java_lang_Class);
 247
 248                 c->header.vftbl = class_java_lang_Class->vftbl;
 249                 c->classvftbl = true;
 250         }
 251
 252         return true;
 253 }
 254
 255
 256 /************************** tables for methods ********************************/
 257
 258 #undef JOWENN_DEBUG
 259 #undef JOWENN_DEBUG1
 260
 261 #ifdef ENABLE_STATICVM
 262 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 263
 264 /* table for fast string comparison */
 265 static nativecompref nativecomptable[NATIVETABLESIZE];
 266
 267 /* string comparsion table initialized */
 268 static bool nativecompdone = false;
 269 #endif
 270
 271
 272 /* XXX don't define this in a header file!!! */
 273
 274 static struct nativeCall nativeCalls[] =
 275 {
 276 #include "nativecalls.inc"
 277 };
 278
 279 #define NATIVECALLSSIZE    (sizeof(nativeCalls) / sizeof(struct nativeCall))
 280
 281 struct nativeCompCall nativeCompCalls[NATIVECALLSSIZE];
 282
 283
 284 /* global variables ***********************************************************/
 285
 286 #if !defined(ENABLE_STATICVM)
 287 static hashtable library_hash;
 288 static lt_dlhandle mainhandle;
 289 #endif
 290
 291
 292 /* native_loadclasses **********************************************************
 293
 294    Load classes required for native methods.
 295
 296 *******************************************************************************/
 297
 298 bool native_init(void)
 299 {
 300 #if !defined(ENABLE_STATICVM)
 301         void *p;
 302
 303         /* We need to access the dummy native table, not only to remove a warning */
 304         /* but to be sure that the table is not optimized away (gcc does this     */
 305         /* since 3.4).                                                            */
 306
 307         p = &dummynativetable;
 308
 309         /* initialize libltdl */
 310
 311         if (lt_dlinit()) {
 312                 /* XXX how can we throw an exception here? */
 313                 log_text(lt_dlerror());
 314
 315                 return false;
 316         }
 317
 318         /* get the handle for the main program */
 319
 320         if (!(mainhandle = lt_dlopen(NULL)))
 321                 return false;
 322
 323         /* initialize library hashtable, 10 entries should be enough */
 324
 325         init_hashtable(&library_hash, 10);
 326
 327 #endif
 328
 329         /* everything's ok */
 330
 331         return true;
 332 }
 333
 334
 335 /* native_library_hash_add *****************************************************
 336
 337    Adds an entry to the native library hashtable.
 338
 339 *******************************************************************************/
 340
 341 #if !defined(ENABLE_STATICVM)
 342 void native_library_hash_add(utf *filename, java_objectheader *loader,
 343                                                          lt_dlhandle handle)
 344 {
 345         library_hash_loader_entry *le;
 346         library_hash_name_entry   *ne;      /* library name                       */
 347         u4   key;                           /* hashkey                            */
 348         u4   slot;                          /* slot in hashtable                  */
 349
 350         /* normally addresses are aligned to 4, 8 or 16 bytes */
 351
 352         key = ((u4) (ptrint) loader) >> 4;         /* align to 16-byte boundaries */
 353         slot = key & (library_hash.size - 1);
 354         le = library_hash.ptr[slot];
 355
 356         /* search external hash chain for the entry */
 357
 358         while (le) {
 359                 if (le->loader == loader)
 360                         break;
 361
 362                 le = le->hashlink;                  /* next element in external chain */
 363         }
 364
 365         /* no loader found? create a new entry */
 366
 367         if (!le) {
 368                 le = NEW(library_hash_loader_entry);
 369
 370                 le->loader = loader;
 371                 le->namelink = NULL;
 372
 373                 /* insert entry into hashtable */
 374
 375                 le->hashlink = (library_hash_loader_entry *) library_hash.ptr[slot];
 376                 library_hash.ptr[slot] = le;
 377
 378                 /* update number of hashtable-entries */
 379
 380                 library_hash.entries++;
 381         }
 382
 383
 384         /* search for library name */
 385
 386         ne = le->namelink;
 387
 388         while (ne) {
 389                 if (ne->name == filename)
 390                         return;
 391
 392                 ne = ne->hashlink;                  /* next element in external chain */
 393         }
 394
 395         /* not found? add the library name to the classloader */
 396
 397         ne = NEW(library_hash_name_entry);
 398
 399         ne->name = filename;
 400         ne->handle = handle;
 401
 402         /* insert entry into external chain */
 403
 404         ne->hashlink = le->namelink;
 405         le->namelink = ne;
 406 }
 407 #endif /* !defined(ENABLE_STATICVM) */
 408
 409
 410 /* native_findfunction *********************************************************
 411
 412    Looks up a method (must have the same class name, method name,
 413    descriptor and 'static'ness) and returns a function pointer to it.
 414    Returns: function pointer or NULL (if there is no such method)
 415
 416    Remark: For faster operation, the names/descriptors are converted
 417    from C strings to Unicode the first time this function is called.
 418
 419 *******************************************************************************/
 420
 421 #if defined(ENABLE_STATICVM)
 422 functionptr native_findfunction(utf *cname, utf *mname, utf *desc,
 423                                                                 bool isstatic)
 424 {
 425         /* entry of table for fast string comparison */
 426         struct nativecompref *n;
 427         s4 i;
 428
 429         isstatic = isstatic ? true : false;
 430
 431         if (!nativecompdone) {
 432                 for (i = 0; i < NATIVETABLESIZE; i++) {
 433                         nativecomptable[i].classname  =
 434                                 utf_new_char(nativetable[i].classname);
 435
 436                         nativecomptable[i].methodname =
 437                                 utf_new_char(nativetable[i].methodname);
 438
 439                         nativecomptable[i].descriptor =
 440                                 utf_new_char(nativetable[i].descriptor);
 441
 442                         nativecomptable[i].isstatic   = nativetable[i].isstatic;
 443                         nativecomptable[i].func       = nativetable[i].func;
 444                 }
 445
 446                 nativecompdone = true;
 447         }
 448
 449         for (i = 0; i < NATIVETABLESIZE; i++) {
 450                 n = &(nativecomptable[i]);
 451
 452                 if (cname == n->classname && mname == n->methodname &&
 453                     desc == n->descriptor && isstatic == n->isstatic)
 454                         return n->func;
 455         }
 456
 457
 458         /* no function was found, throw exception */
 459
 460         *exceptionptr =
 461                         new_exception_utfmessage(string_java_lang_UnsatisfiedLinkError,
 462                                                                          mname);
 463
 464         return NULL;
 465 }
 466 #endif /* defined(ENABLE_STATICVM) */
 467
 468
 469 /* native_make_overloaded_function *********************************************
 470
 471    XXX
 472
 473 *******************************************************************************/
 474
 475 #if !defined(ENABLE_STATICVM)
 476 static char *native_make_overloaded_function(char *name, utf *desc)
 477 {
 478         char *newname;
 479         s4    namelen;
 480         char *utf_ptr;
 481         u2    c;
 482         s4    i;
 483
 484         utf_ptr = desc->text;
 485         namelen = strlen(name) + strlen("__") + strlen("0");
 486
 487         /* calculate additional length */
 488
 489         while ((c = utf_nextu2(&utf_ptr)) != ')') {
 490                 switch (c) {
 491                 case 'Z':
 492                 case 'B':
 493                 case 'C':
 494                 case 'S':
 495                 case 'I':
 496                 case 'J':
 497                 case 'F':
 498                 case 'D':
 499                         namelen++;
 500                         break;
 501                 case '[':
 502                         namelen += 2;
 503                         break;
 504                 case 'L':
 505                         namelen++;
 506                         while (utf_nextu2(&utf_ptr) != ';')
 507                                 namelen++;
 508                         namelen += 2;
 509                         break;
 510                 case '(':
 511                         break;
 512                 default:
 513                         assert(0);
 514                 }
 515         }
 516
 517
 518         /* reallocate memory */
 519
 520         i = strlen(name);
 521
 522         newname = DMNEW(char, namelen);
 523         MCOPY(newname, name, char, i);
 524
 525         utf_ptr = desc->text;
 526
 527         newname[i++] = '_';
 528         newname[i++] = '_';
 529
 530         while ((c = utf_nextu2(&utf_ptr)) != ')') {
 531                 switch (c) {
 532                 case 'Z':
 533                 case 'B':
 534                 case 'C':
 535                 case 'S':
 536                 case 'J':
 537                 case 'I':
 538                 case 'F':
 539                 case 'D':
 540                         newname[i++] = c;
 541                         break;
 542                 case '[':
 543                         newname[i++] = '_';
 544                         newname[i++] = '3';
 545                         break;
 546                 case 'L':
 547                         newname[i++] = 'L';
 548                         while ((c = utf_nextu2(&utf_ptr)) != ';')
 549                                 if (((c >= 'a') && (c <= 'z')) ||
 550                                         ((c >= 'A') && (c <= 'Z')) ||
 551                                         ((c >= '0') && (c <= '9')))
 552                                         newname[i++] = c;
 553                                 else
 554                                         newname[i++] = '_';
 555                         newname[i++] = '_';
 556                         newname[i++] = '2';
 557                         break;
 558                 case '(':
 559                         break;
 560                 default:
 561                         assert(0);
 562                 }
 563         }
 564
 565         /* close string */
 566
 567         newname[i] = '\0';
 568
 569         return newname;
 570 }
 571
 572
 573 /* native_resolve_function *****************************************************
 574
 575    Resolves a native function, maybe from a dynamic library.
 576
 577 *******************************************************************************/
 578
 579 functionptr native_resolve_function(methodinfo *m)
 580 {
 581         lt_ptr                     sym;
 582         char                      *name;
 583         char                      *newname;
 584         s4                         namelen;
 585         char                      *utf_ptr;
 586         char                      *utf_endptr;
 587         s4                         dumpsize;
 588         library_hash_loader_entry *le;
 589         library_hash_name_entry   *ne;
 590         u4                         key;     /* hashkey                            */
 591         u4                         slot;    /* slot in hashtable                  */
 592         u4                         i;
 593
 594
 595         /* verbose output */
 596
 597         if (opt_verbosejni) {
 598                 printf("[Dynamic-linking native method ");
 599                 utf_display_classname(m->class->name);
 600                 printf(".");
 601                 utf_display(m->name);
 602                 printf(" ... ");
 603         }
 604
 605         /* calculate length of native function name */
 606
 607         namelen = strlen("Java_") + utf_strlen(m->class->name) + strlen("_") +
 608                 utf_strlen(m->name) + strlen("0");
 609
 610         /* check for underscores in class name */
 611
 612         utf_ptr = m->class->name->text;
 613         utf_endptr = UTF_END(m->class->name);
 614
 615         while (utf_ptr < utf_endptr)
 616                 if (utf_nextu2(&utf_ptr) == '_')
 617                         namelen++;
 618
 619         /* check for underscores in method name */
 620
 621         utf_ptr = m->name->text;
 622         utf_endptr = UTF_END(m->name);
 623
 624         while (utf_ptr < utf_endptr)
 625                 if (utf_nextu2(&utf_ptr) == '_')
 626                         namelen++;
 627
 628         /* allocate memory */
 629
 630         dumpsize = dump_size();
 631
 632         name = DMNEW(char, namelen);
 633
 634
 635         /* generate name of native functions */
 636
 637         strcpy(name, "Java_");
 638         i = strlen("Java_");
 639
 640         utf_ptr = m->class->name->text;
 641         utf_endptr = UTF_END(m->class->name);
 642
 643         for (; utf_ptr < utf_endptr; utf_ptr++, i++) {
 644                 name[i] = *utf_ptr;
 645
 646                 /* escape sequence for '_' is '_1' */
 647
 648                 if (name[i] == '_')
 649                         name[++i] = '1';
 650
 651                 /* replace '/' with '_' */
 652
 653                 if (name[i] == '/')
 654                         name[i] = '_';
 655         }
 656
 657         /* seperator between class and method */
 658
 659         name[i++] = '_';
 660
 661         utf_ptr = m->name->text;
 662         utf_endptr = UTF_END(m->name);
 663
 664         for (; utf_ptr < utf_endptr; utf_ptr++, i++) {
 665                 name[i] = *utf_ptr;
 666
 667                 /* escape sequence for '_' is '_1' */
 668
 669                 if (name[i] == '_')
 670                         name[++i] = '1';
 671         }
 672
 673         /* close string */
 674
 675         name[i] = '\0';
 676
 677
 678         /* check the library hash entries of the classloader of the methods's     */
 679         /* class                                                                  */
 680
 681         sym = NULL;
 682
 683         /* normally addresses are aligned to 4, 8 or 16 bytes */
 684
 685         key = ((u4) (ptrint) m->class->classloader) >> 4; /* align to 16-byte */
 686         slot = key & (library_hash.size - 1);
 687         le = library_hash.ptr[slot];
 688
 689         /* iterate through loaders in this hash slot */
 690
 691         while (le && !sym) {
 692                 /* iterate through names in this loader */
 693
 694                 ne = le->namelink;
 695
 696                 while (ne && !sym) {
 697                         sym = lt_dlsym(ne->handle, name);
 698
 699                         if (!sym)
 700                                 sym = lt_dlsym(ne->handle, newname);
 701
 702                         ne = ne->hashlink;
 703                 }
 704
 705                 le = le->hashlink;
 706         }
 707
 708         if (sym)
 709                 if (opt_verbosejni)
 710                         printf("JNI ]\n");
 711
 712
 713         /* if not found, try to find the native function symbol in the main       */
 714         /* program                                                                */
 715
 716         if (!sym) {
 717                 sym = lt_dlsym(mainhandle, name);
 718
 719                 if (!sym) {
 720                         /* we didn't find the symbol yet, try to resolve an overloaded    */
 721                         /* function (having the types in it's name)                       */
 722
 723                         newname = native_make_overloaded_function(name, m->descriptor);
 724
 725                         /* try to find the overloaded symbol */
 726
 727                         sym = lt_dlsym(mainhandle, newname);
 728                 }
 729
 730                 if (sym)
 731                         if (opt_verbosejni)
 732                                 printf("internal ]\n");
 733         }
 734
 735
 736         /* no symbol found? throw exception */
 737
 738         if (!sym)
 739                 *exceptionptr =
 740                         new_exception_utfmessage(string_java_lang_UnsatisfiedLinkError,
 741                                                                          m->name);
 742
 743         /* release memory */
 744
 745         dump_release(dumpsize);
 746
 747         return (functionptr) (ptrint) sym;
 748 }
 749 #endif /* !defined(ENABLE_STATICVM) */
 750
 751
 752 /****************** function class_findfield_approx ****************************
 753
 754         searches in 'classinfo'-structure for a field with the
 755         specified name
 756
 757 *******************************************************************************/
 758
 759 fieldinfo *class_findfield_approx(classinfo *c, utf *name)
 760 {
 761         s4 i;
 762
 763         for (i = 0; i < c->fieldscount; i++) {
 764                 /* compare field names */
 765                 if ((c->fields[i].name == name))
 766                         return &(c->fields[i]);
 767         }
 768
 769         /* field was not found, raise exception */
 770         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 771
 772         return NULL;
 773 }
 774
 775
 776 s4 class_findfield_index_approx(classinfo *c, utf *name)
 777 {
 778         s4 i;
 779
 780         for (i = 0; i < c->fieldscount; i++) {
 781                 /* compare field names */
 782                 if ((c->fields[i].name == name))
 783                         return i;
 784         }
 785
 786         /* field was not found, raise exception */
 787         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 788
 789         return -1;
 790 }
 791
 792
 793 /* native_new_and_init *********************************************************
 794
 795    Creates a new object on the heap and calls the initializer.
 796    Returns the object pointer or NULL if memory is exhausted.
 797
 798 *******************************************************************************/
 799
 800 java_objectheader *native_new_and_init(classinfo *c)
 801 {
 802         methodinfo *m;
 803         java_objectheader *o;
 804
 805         if (!c)
 806                 return *exceptionptr;
 807
 808         /* create object */
 809
 810         o = builtin_new(c);
 811
 812         if (!o)
 813                 return NULL;
 814
 815         /* find initializer */
 816
 817         m = class_findmethod(c, utf_init, utf_void__void);
 818
 819         /* initializer not found */
 820
 821         if (!m)
 822                 return o;
 823
 824         /* call initializer */
 825
 826         asm_calljavafunction(m, o, NULL, NULL, NULL);
 827
 828         return o;
 829 }
 830
 831
 832 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
 833 {
 834         methodinfo *m;
 835         java_objectheader *o;
 836
 837         if (!c)
 838                 return *exceptionptr;
 839
 840         /* create object */
 841
 842         o = builtin_new(c);
 843
 844         if (!o)
 845                 return NULL;
 846
 847         /* find initializer */
 848
 849         m = class_resolveclassmethod(c,
 850                                                                  utf_init,
 851                                                                  utf_java_lang_String__void,
 852                                                                  NULL,
 853                                                                  true);
 854
 855         /* initializer not found */
 856
 857         if (!m)
 858                 return NULL;
 859
 860         /* call initializer */
 861
 862         asm_calljavafunction(m, o, s, NULL, NULL);
 863
 864         return o;
 865 }
 866
 867
 868 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
 869 {
 870         methodinfo *m;
 871         java_objectheader *o;
 872
 873         if (!c)
 874                 return *exceptionptr;
 875
 876         /* create object */
 877
 878         o = builtin_new(c);
 879
 880         if (!o)
 881                 return NULL;
 882
 883         /* find initializer */
 884
 885         m = class_resolveclassmethod(c, utf_init, utf_int__void, NULL, true);
 886
 887         /* initializer not found  */
 888
 889         if (!m)
 890                 return NULL;
 891
 892         /* call initializer */
 893
 894         asm_calljavafunction(m, o, (void *) (ptrint) i, NULL, NULL);
 895
 896         return o;
 897 }
 898
 899
 900 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
 901 {
 902         methodinfo *m;
 903         java_objectheader *o;
 904
 905         if (!c)
 906                 return *exceptionptr;
 907
 908         /* create object */
 909
 910         o = builtin_new(c);
 911
 912         if (!o)
 913                 return NULL;
 914
 915         /* find initializer */
 916
 917         m = class_findmethod(c, utf_init, utf_java_lang_Throwable__void);
 918
 919         /* initializer not found */
 920
 921         if (!m)
 922                 return NULL;
 923
 924         /* call initializer */
 925
 926         asm_calljavafunction(m, o, t, NULL, NULL);
 927
 928         return o;
 929 }
 930
 931
 932 void copy_vftbl(vftbl_t **dest, vftbl_t *src)
 933 {
 934     *dest = src;
 935 #if 0
 936     /* XXX this kind of copying does not work (in the general
 937      * case). The interface tables would have to be copied, too. I
 938      * don't see why we should make a copy anyway. -Edwin
 939      */
 940         *dest = mem_alloc(sizeof(vftbl) + sizeof(methodptr)*(src->vftbllength-1));
 941         memcpy(*dest, src, sizeof(vftbl) - sizeof(methodptr));
 942         memcpy(&(*dest)->table, &src->table, src->vftbllength * sizeof(methodptr));
 943 #endif
 944 }
 945
 946
 947 /******************************************************************************************
 948
 949         creates method signature (excluding return type) from array of
 950         class-objects representing the parameters of the method
 951
 952 *******************************************************************************************/
 953
 954
 955 utf *create_methodsig(java_objectarray* types, char *retType)
 956 {
 957     char *buffer;       /* buffer for building the desciptor */
 958     char *pos;          /* current position in buffer */
 959     utf *result;        /* the method signature */
 960     u4 buffer_size = 3; /* minimal size=3: room for parenthesis and returntype */
 961     u4 i, j;
 962
 963     if (!types) return NULL;
 964
 965     /* determine required buffer-size */
 966     for (i = 0; i < types->header.size; i++) {
 967                 classinfo *c = (classinfo *) types->data[i];
 968                 buffer_size  = buffer_size + c->name->blength + 2;
 969     }
 970
 971     if (retType) buffer_size += strlen(retType);
 972
 973     /* allocate buffer */
 974     buffer = MNEW(char, buffer_size);
 975     pos    = buffer;
 976
 977     /* method-desciptor starts with parenthesis */
 978     *pos++ = '(';
 979
 980     for (i = 0; i < types->header.size; i++) {
 981                 char ch;
 982
 983                 /* current argument */
 984             classinfo *c = (classinfo *) types->data[i];
 985
 986             /* current position in utf-text */
 987             char *utf_ptr = c->name->text;
 988
 989             /* determine type of argument */
 990             if ((ch = utf_nextu2(&utf_ptr)) == '[') {
 991                 /* arrayclass */
 992                 for (utf_ptr--; utf_ptr < UTF_END(c->name); utf_ptr++) {
 993                                 *pos++ = *utf_ptr; /* copy text */
 994                         }
 995
 996             } else {
 997                         /* check for primitive types */
 998                         for (j = 0; j < PRIMITIVETYPE_COUNT; j++) {
 999                                 char *utf_pos   = utf_ptr - 1;
1000                                 char *primitive = primitivetype_table[j].wrapname;
1001
1002                                 /* compare text */
1003                                 while (utf_pos < UTF_END(c->name)) {
1004                                         if (*utf_pos++ != *primitive++) goto nomatch;
1005                                 }
1006
1007                                 /* primitive type found */
1008                                 *pos++ = primitivetype_table[j].typesig;
1009                                 goto next_type;
1010
1011                         nomatch:
1012                                 ;
1013                         }
1014
1015                         /* no primitive type and no arrayclass, so must be object */
1016                         *pos++ = 'L';
1017
1018                         /* copy text */
1019                         for (utf_ptr--; utf_ptr < UTF_END(c->name); utf_ptr++) {
1020                                 *pos++ = *utf_ptr;
1021                         }
1022
1023                         *pos++ = ';';
1024
1025                 next_type:
1026                         ;
1027                 }
1028     }
1029
1030     *pos++ = ')';
1031
1032     if (retType) {
1033                 for (i = 0; i < strlen(retType); i++) {
1034                         *pos++ = retType[i];
1035                 }
1036     }
1037
1038     /* create utf-string */
1039     result = utf_new(buffer, (pos - buffer));
1040     MFREE(buffer, char, buffer_size);
1041
1042     return result;
1043 }
1044
1045
1046 /* native_get_parametertypes ***************************************************
1047
1048    Use the descriptor of a method to generate a java/lang/Class array
1049    which contains the classes of the parametertypes of the method.
1050
1051 *******************************************************************************/
1052
1053 java_objectarray *native_get_parametertypes(methodinfo *m)
1054 {
1055         methoddesc       *md;
1056         typedesc         *paramtypes;
1057         s4                paramcount;
1058     java_objectarray *oa;
1059         s4                i;
1060
1061         md = m->parseddesc;
1062
1063         /* is the descriptor fully parsed? */
1064
1065         if (!m->parseddesc->params)
1066                 if (!descriptor_params_from_paramtypes(md, m->flags))
1067                         return NULL;
1068
1069         paramtypes = md->paramtypes;
1070         paramcount = md->paramcount;
1071
1072         /* skip `this' pointer */
1073
1074         if (!(m->flags & ACC_STATIC)) {
1075                 paramtypes++;
1076                 paramcount--;
1077         }
1078
1079         /* create class-array */
1080
1081         oa = builtin_anewarray(paramcount, class_java_lang_Class);
1082
1083         if (!oa)
1084                 return NULL;
1085
1086     /* get classes */
1087
1088         for (i = 0; i < paramcount; i++) {
1089                 if (!resolve_class_from_typedesc(&paramtypes[i], true, false,
1090                                                                                  (classinfo **) &oa->data[i]))
1091                         return NULL;
1092
1093                 use_class_as_object((classinfo *) oa->data[i]);
1094         }
1095
1096         return oa;
1097 }
1098
1099
1100 /* native_get_exceptiontypes ***************************************************
1101
1102    Get the exceptions which can be thrown by a method.
1103
1104 *******************************************************************************/
1105
1106 java_objectarray *native_get_exceptiontypes(methodinfo *m)
1107 {
1108     u2                excount;
1109     java_objectarray *oa;
1110         classinfo        *c;
1111     u2                i;
1112
1113         /* create class-array */
1114
1115     oa = builtin_anewarray(excount, class_java_lang_Class);
1116
1117         if (!oa)
1118                 return NULL;
1119
1120         /* get exceptions */
1121
1122         excount = m->thrownexceptionscount;
1123
1124     for (i = 0; i < excount; i++) {
1125                 if (!resolve_classref_or_classinfo(NULL, m->thrownexceptions[i],
1126                                                                                    resolveEager, true, false, &c))
1127                         return NULL;
1128
1129                 use_class_as_object(c);
1130
1131                 oa->data[i] = (java_objectheader *) c;
1132     }
1133
1134     return oa;
1135 }
1136
1137
1138 /* native_get_returntype *******************************************************
1139
1140    Get the returntype class of a method.
1141
1142 *******************************************************************************/
1143
1144 classinfo *native_get_returntype(methodinfo *m)
1145 {
1146         classinfo *c;
1147
1148         if (!resolve_class_from_typedesc(&(m->parseddesc->returntype), true, false,
1149                                                                          &c))
1150                 return NULL;
1151
1152         use_class_as_object(c);
1153
1154         return c;
1155 }
1156
1157
1158 /*****************************************************************************/
1159 /*****************************************************************************/
1160
1161
1162 /*--------------------------------------------------------*/
1163 void printNativeCall(nativeCall nc) {
1164   int i,j;
1165
1166   printf("\n%s's Native Methods call:\n",nc.classname); fflush(stdout);
1167   for (i=0; i<nc.methCnt; i++) {
1168       printf("\tMethod=%s %s\n",nc.methods[i].methodname, nc.methods[i].descriptor);fflush(stdout);
1169
1170     for (j=0; j<nc.callCnt[i]; j++) {
1171         printf("\t\t<%i,%i>aCalled = %s %s %s\n",i,j,
1172         nc.methods[i].methodCalls[j].classname,
1173         nc.methods[i].methodCalls[j].methodname,
1174         nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1175       }
1176     }
1177   printf("-+++++--------------------\n");fflush(stdout);
1178 }
1179
1180 /*--------------------------------------------------------*/
1181 void printCompNativeCall(nativeCompCall nc) {
1182   int i,j;
1183   printf("printCompNativeCall BEGIN\n");fflush(stdout);
1184   printf("\n%s's Native Comp Methods call:\n",nc.classname->text);fflush(stdout);
1185   utf_display(nc.classname); fflush(stdout);
1186
1187   for (i=0; i<nc.methCnt; i++) {
1188     printf("\tMethod=%s %s\n",nc.methods[i].methodname->text,nc.methods[i].descriptor->text);fflush(stdout);
1189     utf_display(nc.methods[i].methodname); fflush(stdout);
1190     utf_display(nc.methods[i].descriptor);fflush(stdout);
1191     printf("\n");fflush(stdout);
1192
1193     for (j=0; j<nc.callCnt[i]; j++) {
1194       printf("\t\t<%i,%i>bCalled = ",i,j);fflush(stdout);
1195         utf_display(nc.methods[i].methodCalls[j].classname);fflush(stdout);
1196         utf_display(nc.methods[i].methodCalls[j].methodname); fflush(stdout);
1197         utf_display(nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1198         printf("\n");fflush(stdout);
1199       }
1200     }
1201 printf("---------------------\n");fflush(stdout);
1202 }
1203
1204
1205 /*--------------------------------------------------------*/
1206 classMeth findNativeMethodCalls(utf *c, utf *m, utf *d )
1207 {
1208     int i = 0;
1209     int j = 0;
1210     int cnt = 0;
1211     classMeth mc;
1212     mc.i_class = i;
1213     mc.j_method = j;
1214     mc.methCnt = cnt;
1215
1216     return mc;
1217 }
1218
1219 /*--------------------------------------------------------*/
1220 nativeCall* findNativeClassCalls(char *aclassname ) {
1221 int i;
1222
1223 for (i=0;i<NATIVECALLSSIZE; i++) {
1224    /* convert table to utf later to speed up search */
1225    if (strcmp(nativeCalls[i].classname, aclassname) == 0)
1226         return &nativeCalls[i];
1227    }
1228
1229 return NULL;
1230 }
1231 /*--------------------------------------------------------*/
1232 /*--------------------------------------------------------*/
1233 void utfNativeCall(nativeCall nc, nativeCompCall *ncc) {
1234   int i,j;
1235
1236
1237   ncc->classname = utf_new_char(nc.classname);
1238   ncc->methCnt = nc.methCnt;
1239
1240   for (i=0; i<nc.methCnt; i++) {
1241     ncc->methods[i].methodname = utf_new_char(nc.methods[i].methodname);
1242     ncc->methods[i].descriptor = utf_new_char(nc.methods[i].descriptor);
1243     ncc->callCnt[i] = nc.callCnt[i];
1244
1245     for (j=0; j<nc.callCnt[i]; j++) {
1246
1247         ncc->methods[i].methodCalls[j].classname  = utf_new_char(nc.methods[i].methodCalls[j].classname);
1248
1249         if (strcmp("", nc.methods[i].methodCalls[j].methodname) != 0) {
1250           ncc->methods[i].methodCalls[j].methodname = utf_new_char(nc.methods[i].methodCalls[j].methodname);
1251           ncc->methods[i].methodCalls[j].descriptor = utf_new_char(nc.methods[i].methodCalls[j].descriptor);
1252           }
1253         else {
1254           ncc->methods[i].methodCalls[j].methodname = NULL;
1255           ncc->methods[i].methodCalls[j].descriptor = NULL;
1256           }
1257       }
1258     }
1259 }
1260
1261
1262
1263 /*--------------------------------------------------------*/
1264
1265 bool natcall2utf(bool natcallcompdone) {
1266 int i;
1267
1268 if (natcallcompdone)
1269         return true;
1270
1271 for (i=0;i<NATIVECALLSSIZE; i++) {
1272    utfNativeCall  (nativeCalls[i], &nativeCompCalls[i]);
1273    }
1274
1275 return true;
1276 }
1277
1278 /*
1279  * These are local overrides for various environment variables in Emacs.
1280  * Please do not remove this and leave it at the end of the file, where
1281  * Emacs will automagically detect them.
1282  * ---------------------------------------------------------------------
1283  * Local variables:
1284  * mode: c
1285  * indent-tabs-mode: t
1286  * c-basic-offset: 4
1287  * tab-width: 4
1288  * End:
1289  */