src/native/native.c

   1 /* src/native/native.c - table of native functions
   2
   3    Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, 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., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25    Contact: cacao@cacaojvm.org
  26
  27    Authors: Reinhard Grafl
  28             Roman Obermaisser
  29             Andreas Krall
  30
  31    Changes: Christian Thalinger
  32
  33    $Id: native.c 5567 2006-09-28 20:20:18Z edwin $
  34
  35 */
  36
  37
  38 #include "config.h"
  39
  40 #include <assert.h>
  41 #include <ctype.h>
  42
  43 #if !defined(WITH_STATIC_CLASSPATH)
  44 # include <ltdl.h>
  45 #endif
  46
  47 #include "vm/types.h"
  48
  49 #include "mm/memory.h"
  50 #include "native/jni.h"
  51 #include "native/native.h"
  52 #include "native/include/java_lang_Throwable.h"
  53
  54 #if defined(ENABLE_THREADS)
  55 # include "threads/native/lock.h"
  56 #else
  57 # include "threads/none/lock.h"
  58 #endif
  59
  60 #include "toolbox/logging.h"
  61 #include "vm/builtin.h"
  62 #include "vm/exceptions.h"
  63 #include "vm/global.h"
  64 #include "vm/hashtable.h"
  65 #include "vm/loader.h"
  66 #include "vm/options.h"
  67 #include "vm/resolve.h"
  68 #include "vm/stringlocal.h"
  69 #include "vm/vm.h"
  70 #include "vm/jit/asmpart.h"
  71 #include "vm/jit/jit.h"
  72
  73 #if defined(ENABLE_JVMTI)
  74 #include "native/jvmti/cacaodbg.h"
  75 #endif
  76
  77
  78 /* include table of native functions ******************************************/
  79
  80 #include "native/include/java_lang_Cloneable.h"
  81 #include "native/include/java_util_Properties.h"
  82 #include "native/include/java_io_InputStream.h"
  83 #include "native/include/java_io_PrintStream.h"
  84
  85 #include "native/include/gnu_classpath_VMStackWalker.h"
  86 #include "native/include/gnu_classpath_VMSystemProperties.h"
  87 #include "native/include/gnu_java_lang_management_VMClassLoadingMXBeanImpl.h"
  88 #include "native/include/gnu_java_lang_management_VMMemoryMXBeanImpl.h"
  89 #include "native/include/gnu_java_lang_management_VMRuntimeMXBeanImpl.h"
  90 #include "native/include/java_lang_Class.h"
  91 #include "native/include/java_lang_Object.h"
  92 #include "native/include/java_lang_VMClass.h"
  93 #include "native/include/java_lang_VMClassLoader.h"
  94 #include "native/include/java_lang_VMObject.h"
  95 #include "native/include/java_lang_VMRuntime.h"
  96 #include "native/include/java_lang_VMString.h"
  97 #include "native/include/java_lang_VMSystem.h"
  98 #include "native/include/java_lang_VMThread.h"
  99 #include "native/include/java_lang_VMThrowable.h"
 100 #include "native/include/java_lang_management_VMManagementFactory.h"
 101 #include "native/include/java_lang_reflect_Constructor.h"
 102 #include "native/include/java_lang_reflect_Field.h"
 103 #include "native/include/java_lang_reflect_Method.h"
 104 #include "native/include/java_lang_reflect_VMProxy.h"
 105 #include "native/include/java_security_VMAccessController.h"
 106
 107 #if defined(ENABLE_JVMTI)
 108 #include "native/include/gnu_classpath_jdwp_event_EventRequest.h"
 109 #include "native/include/java_nio_ByteBuffer.h"
 110 #include "native/include/gnu_classpath_jdwp_VMVirtualMachine.h"
 111 #include "native/include/gnu_classpath_jdwp_VMFrame.h"
 112 #include "native/include/gnu_classpath_jdwp_VMMethod.h"
 113 #endif
 114
 115 #if defined(WITH_STATIC_CLASSPATH)
 116
 117 /* these are required to prevent compiler warnings */
 118
 119 #include "native/include/java_net_DatagramPacket.h"
 120 #include "native/include/java_net_InetAddress.h"
 121 #include "native/include/java_net_SocketImpl.h"
 122
 123 #include "native/include/gnu_java_net_PlainDatagramSocketImpl.h"
 124 #include "native/include/gnu_java_net_PlainSocketImpl.h"
 125 #include "native/include/gnu_java_nio_PipeImpl.h"
 126 #include "native/include/gnu_java_nio_channels_FileChannelImpl.h"
 127 #include "native/include/gnu_java_nio_charset_iconv_IconvEncoder.h"
 128 #include "native/include/gnu_java_nio_charset_iconv_IconvDecoder.h"
 129 #include "native/include/java_lang_VMProcess.h"
 130 #include "native/include/java_nio_MappedByteBufferImpl.h"
 131 #include "native/include/java_nio_channels_spi_SelectorProvider.h"
 132
 133 /* now include the native table */
 134
 135 #include "native/nativetable.inc"
 136
 137 #elif !defined(ENABLE_LIBJVM)
 138
 139 /* dummynativetable ************************************************************
 140
 141    Ensure that symbols for functions implemented within CACAO are used
 142    and exported to dlopen.
 143
 144    ATTENTION: Don't make this table static!!!  Otherwise the compiler
 145    may optimize it away!
 146
 147 *******************************************************************************/
 148
 149 functionptr dummynativetable[] = {
 150         (functionptr) Java_gnu_classpath_VMStackWalker_getClassContext,
 151         (functionptr) Java_gnu_classpath_VMStackWalker_getCallingClass,
 152         (functionptr) Java_gnu_classpath_VMStackWalker_getCallingClassLoader,
 153         (functionptr) Java_gnu_classpath_VMStackWalker_firstNonNullClassLoader,
 154
 155         (functionptr) Java_gnu_classpath_VMSystemProperties_preInit,
 156
 157         (functionptr) Java_gnu_java_lang_management_VMClassLoadingMXBeanImpl_getLoadedClassCount,
 158         (functionptr) Java_gnu_java_lang_management_VMClassLoadingMXBeanImpl_getUnloadedClassCount,
 159         (functionptr) Java_gnu_java_lang_management_VMClassLoadingMXBeanImpl_isVerbose,
 160         (functionptr) Java_gnu_java_lang_management_VMClassLoadingMXBeanImpl_setVerbose,
 161
 162         (functionptr) Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getHeapMemoryUsage,
 163         (functionptr) Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getNonHeapMemoryUsage,
 164         (functionptr) Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getObjectPendingFinalizationCount,
 165         (functionptr) Java_gnu_java_lang_management_VMMemoryMXBeanImpl_isVerbose,
 166         (functionptr) Java_gnu_java_lang_management_VMMemoryMXBeanImpl_setVerbose,
 167
 168         (functionptr) Java_gnu_java_lang_management_VMRuntimeMXBeanImpl_getInputArguments,
 169         (functionptr) Java_gnu_java_lang_management_VMRuntimeMXBeanImpl_getStartTime,
 170
 171         (functionptr) Java_java_lang_VMClass_isInstance,
 172         (functionptr) Java_java_lang_VMClass_isAssignableFrom,
 173         (functionptr) Java_java_lang_VMClass_isInterface,
 174         (functionptr) Java_java_lang_VMClass_isPrimitive,
 175         (functionptr) Java_java_lang_VMClass_getName,
 176         (functionptr) Java_java_lang_VMClass_getSuperclass,
 177         (functionptr) Java_java_lang_VMClass_getInterfaces,
 178         (functionptr) Java_java_lang_VMClass_getComponentType,
 179         (functionptr) Java_java_lang_VMClass_getModifiers,
 180         (functionptr) Java_java_lang_VMClass_getDeclaringClass,
 181         (functionptr) Java_java_lang_VMClass_getDeclaredClasses,
 182         (functionptr) Java_java_lang_VMClass_getDeclaredFields,
 183         (functionptr) Java_java_lang_VMClass_getDeclaredMethods,
 184         (functionptr) Java_java_lang_VMClass_getDeclaredConstructors,
 185         (functionptr) Java_java_lang_VMClass_getClassLoader,
 186         (functionptr) Java_java_lang_VMClass_forName,
 187         (functionptr) Java_java_lang_VMClass_isArray,
 188         (functionptr) Java_java_lang_VMClass_throwException,
 189
 190         (functionptr) Java_java_lang_VMClassLoader_defineClass,
 191         (functionptr) Java_java_lang_VMClassLoader_resolveClass,
 192         (functionptr) Java_java_lang_VMClassLoader_loadClass,
 193         (functionptr) Java_java_lang_VMClassLoader_getPrimitiveClass,
 194         (functionptr) Java_java_lang_VMClassLoader_nativeGetResources,
 195         (functionptr) Java_java_lang_VMClassLoader_findLoadedClass,
 196
 197         (functionptr) Java_java_lang_VMObject_getClass,
 198         (functionptr) Java_java_lang_VMObject_clone,
 199         (functionptr) Java_java_lang_VMObject_notify,
 200         (functionptr) Java_java_lang_VMObject_notifyAll,
 201         (functionptr) Java_java_lang_VMObject_wait,
 202
 203         (functionptr) Java_java_lang_VMRuntime_availableProcessors,
 204         (functionptr) Java_java_lang_VMRuntime_freeMemory,
 205         (functionptr) Java_java_lang_VMRuntime_totalMemory,
 206         (functionptr) Java_java_lang_VMRuntime_maxMemory,
 207         (functionptr) Java_java_lang_VMRuntime_gc,
 208         (functionptr) Java_java_lang_VMRuntime_runFinalization,
 209         (functionptr) Java_java_lang_VMRuntime_runFinalizationForExit,
 210         (functionptr) Java_java_lang_VMRuntime_traceInstructions,
 211         (functionptr) Java_java_lang_VMRuntime_traceMethodCalls,
 212         (functionptr) Java_java_lang_VMRuntime_runFinalizersOnExit,
 213         (functionptr) Java_java_lang_VMRuntime_exit,
 214         (functionptr) Java_java_lang_VMRuntime_nativeLoad,
 215         (functionptr) Java_java_lang_VMRuntime_mapLibraryName,
 216
 217         (functionptr) Java_java_lang_VMString_intern,
 218
 219         (functionptr) Java_java_lang_VMSystem_arraycopy,
 220         (functionptr) Java_java_lang_VMSystem_identityHashCode,
 221
 222         (functionptr) Java_java_lang_VMThread_start,
 223         (functionptr) Java_java_lang_VMThread_interrupt,
 224         (functionptr) Java_java_lang_VMThread_isInterrupted,
 225         (functionptr) Java_java_lang_VMThread_suspend,
 226         (functionptr) Java_java_lang_VMThread_resume,
 227         (functionptr) Java_java_lang_VMThread_nativeSetPriority,
 228         (functionptr) Java_java_lang_VMThread_nativeStop,
 229         (functionptr) Java_java_lang_VMThread_currentThread,
 230         (functionptr) Java_java_lang_VMThread_yield,
 231         (functionptr) Java_java_lang_VMThread_interrupted,
 232         (functionptr) Java_java_lang_VMThread_holdsLock,
 233
 234         (functionptr) Java_java_lang_VMThrowable_fillInStackTrace,
 235         (functionptr) Java_java_lang_VMThrowable_getStackTrace,
 236
 237         (functionptr) Java_java_lang_management_VMManagementFactory_getMemoryPoolNames,
 238         (functionptr) Java_java_lang_management_VMManagementFactory_getMemoryManagerNames,
 239         (functionptr) Java_java_lang_management_VMManagementFactory_getGarbageCollectorNames,
 240
 241         (functionptr) Java_java_lang_reflect_Constructor_getModifiersInternal,
 242         (functionptr) Java_java_lang_reflect_Constructor_constructNative,
 243
 244         (functionptr) Java_java_lang_reflect_Field_getModifiersInternal,
 245         (functionptr) Java_java_lang_reflect_Field_getType,
 246         (functionptr) Java_java_lang_reflect_Field_get,
 247         (functionptr) Java_java_lang_reflect_Field_getBoolean,
 248         (functionptr) Java_java_lang_reflect_Field_getByte,
 249         (functionptr) Java_java_lang_reflect_Field_getChar,
 250         (functionptr) Java_java_lang_reflect_Field_getShort,
 251         (functionptr) Java_java_lang_reflect_Field_getInt,
 252         (functionptr) Java_java_lang_reflect_Field_getLong,
 253         (functionptr) Java_java_lang_reflect_Field_getFloat,
 254         (functionptr) Java_java_lang_reflect_Field_getDouble,
 255         (functionptr) Java_java_lang_reflect_Field_set,
 256         (functionptr) Java_java_lang_reflect_Field_setBoolean,
 257         (functionptr) Java_java_lang_reflect_Field_setByte,
 258         (functionptr) Java_java_lang_reflect_Field_setChar,
 259         (functionptr) Java_java_lang_reflect_Field_setShort,
 260         (functionptr) Java_java_lang_reflect_Field_setInt,
 261         (functionptr) Java_java_lang_reflect_Field_setLong,
 262         (functionptr) Java_java_lang_reflect_Field_setFloat,
 263         (functionptr) Java_java_lang_reflect_Field_setDouble,
 264
 265         (functionptr) Java_java_lang_reflect_Method_getModifiersInternal,
 266         (functionptr) Java_java_lang_reflect_Method_getReturnType,
 267         (functionptr) Java_java_lang_reflect_Method_getParameterTypes,
 268         (functionptr) Java_java_lang_reflect_Method_getExceptionTypes,
 269         (functionptr) Java_java_lang_reflect_Method_invokeNative,
 270
 271         (functionptr) Java_java_lang_reflect_VMProxy_getProxyClass,
 272         (functionptr) Java_java_lang_reflect_VMProxy_getProxyData,
 273         (functionptr) Java_java_lang_reflect_VMProxy_generateProxyClass,
 274
 275         (functionptr) Java_java_security_VMAccessController_getStack,
 276
 277 #if defined(ENABLE_JVMTI)
 278         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_suspendThread,
 279         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_resumeThread,
 280         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getSuspendCount,
 281         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getAllLoadedClassesCount,
 282         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getClassStatus,
 283         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getAllClassMethods,
 284         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getClassMethod,
 285         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getFrames,
 286         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getFrame,
 287         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getFrameCount,
 288         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getThreadStatus,
 289         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getLoadRequests,
 290         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_executeMethod,
 291         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getSourceFile,
 292         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_registerEvent,
 293         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_unregisterEvent,
 294         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_clearEvents,
 295         (functionptr) Java_gnu_classpath_jdwp_VMVirtualMachine_getAllLoadedClasses,
 296         (functionptr) Java_gnu_classpath_jdwp_VMFrame_setValue,
 297         (functionptr) Java_gnu_classpath_jdwp_VMFrame_getValue,
 298         (functionptr) Java_gnu_classpath_jdwp_VMMethod_getName,
 299         (functionptr) Java_gnu_classpath_jdwp_VMMethod_getSignature,
 300         (functionptr) Java_gnu_classpath_jdwp_VMMethod_getModifiers,
 301         (functionptr) Java_gnu_classpath_jdwp_VMMethod_getLineTable,
 302         (functionptr) Java_gnu_classpath_jdwp_VMMethod_getVariableTable
 303 #endif
 304
 305 };
 306
 307 #endif /* defined(ENABLE_LIBJVM) */
 308
 309
 310 /* tables for methods *********************************************************/
 311
 312 #if defined(WITH_STATIC_CLASSPATH)
 313 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 314
 315 /* table for fast string comparison */
 316 static nativecompref nativecomptable[NATIVETABLESIZE];
 317
 318 /* string comparsion table initialized */
 319 static bool nativecompdone = false;
 320 #endif
 321
 322
 323 /* global variables ***********************************************************/
 324
 325 #if !defined(WITH_STATIC_CLASSPATH)
 326 static hashtable *hashtable_library;
 327 static lt_dlhandle mainhandle;
 328 #endif
 329
 330
 331 /* native_loadclasses **********************************************************
 332
 333    Load classes required for native methods.
 334
 335 *******************************************************************************/
 336
 337 bool native_init(void)
 338 {
 339 #if !defined(WITH_STATIC_CLASSPATH)
 340         /* initialize libltdl */
 341
 342         if (lt_dlinit()) {
 343                 /* XXX how can we throw an exception here? */
 344                 log_text(lt_dlerror());
 345
 346                 return false;
 347         }
 348
 349         /* get the handle for the main program */
 350
 351         if (!(mainhandle = lt_dlopen(NULL)))
 352                 return false;
 353
 354         /* initialize library hashtable, 10 entries should be enough */
 355
 356         hashtable_library = NEW(hashtable);
 357
 358         hashtable_create(hashtable_library, 10);
 359 #endif
 360
 361         /* everything's ok */
 362
 363         return true;
 364 }
 365
 366
 367 /* native_hashtable_library_add ************************************************
 368
 369    Adds an entry to the native library hashtable.
 370
 371 *******************************************************************************/
 372
 373 #if !defined(WITH_STATIC_CLASSPATH)
 374 void native_hashtable_library_add(utf *filename, java_objectheader *loader,
 375                                                                   lt_dlhandle handle)
 376 {
 377         hashtable_library_loader_entry *le;
 378         hashtable_library_name_entry   *ne; /* library name                       */
 379         u4   key;                           /* hashkey                            */
 380         u4   slot;                          /* slot in hashtable                  */
 381
 382         LOCK_MONITOR_ENTER(hashtable_library->header);
 383
 384         /* normally addresses are aligned to 4, 8 or 16 bytes */
 385
 386         key  = ((u4) (ptrint) loader) >> 4;        /* align to 16-byte boundaries */
 387         slot = key & (hashtable_library->size - 1);
 388         le   = hashtable_library->ptr[slot];
 389
 390         /* search external hash chain for the entry */
 391
 392         while (le) {
 393                 if (le->loader == loader)
 394                         break;
 395
 396                 le = le->hashlink;                  /* next element in external chain */
 397         }
 398
 399         /* no loader found? create a new entry */
 400
 401         if (le == NULL) {
 402                 le = NEW(hashtable_library_loader_entry);
 403
 404                 le->loader   = loader;
 405                 le->namelink = NULL;
 406
 407                 /* insert entry into hashtable */
 408
 409                 le->hashlink =
 410                         (hashtable_library_loader_entry *) hashtable_library->ptr[slot];
 411                 hashtable_library->ptr[slot] = le;
 412
 413                 /* update number of hashtable-entries */
 414
 415                 hashtable_library->entries++;
 416         }
 417
 418
 419         /* search for library name */
 420
 421         ne = le->namelink;
 422
 423         while (ne) {
 424                 if (ne->name == filename) {
 425                         LOCK_MONITOR_EXIT(hashtable_library->header);
 426
 427                         return;
 428                 }
 429
 430                 ne = ne->hashlink;                  /* next element in external chain */
 431         }
 432
 433         /* not found? add the library name to the classloader */
 434
 435         ne = NEW(hashtable_library_name_entry);
 436
 437         ne->name   = filename;
 438         ne->handle = handle;
 439
 440         /* insert entry into external chain */
 441
 442         ne->hashlink = le->namelink;
 443         le->namelink = ne;
 444
 445         LOCK_MONITOR_EXIT(hashtable_library->header);
 446 }
 447 #endif /* !defined(WITH_STATIC_CLASSPATH) */
 448
 449
 450 /* native_hashtable_library_find ***********************************************
 451
 452    Find an entry in the native library hashtable.
 453
 454 *******************************************************************************/
 455
 456 #if !defined(WITH_STATIC_CLASSPATH)
 457 hashtable_library_name_entry *native_hashtable_library_find(utf *filename,
 458                                                                                                                         java_objectheader *loader)
 459 {
 460         hashtable_library_loader_entry *le;
 461         hashtable_library_name_entry   *ne; /* library name                       */
 462         u4   key;                           /* hashkey                            */
 463         u4   slot;                          /* slot in hashtable                  */
 464
 465         /* normally addresses are aligned to 4, 8 or 16 bytes */
 466
 467         key  = ((u4) (ptrint) loader) >> 4;        /* align to 16-byte boundaries */
 468         slot = key & (hashtable_library->size - 1);
 469         le   = hashtable_library->ptr[slot];
 470
 471         /* search external hash chain for the entry */
 472
 473         while (le) {
 474                 if (le->loader == loader)
 475                         break;
 476
 477                 le = le->hashlink;                  /* next element in external chain */
 478         }
 479
 480         /* no loader found? return NULL */
 481
 482         if (!le)
 483                 return NULL;
 484
 485         /* search for library name */
 486
 487         ne = le->namelink;
 488
 489         while (ne) {
 490                 if (ne->name == filename)
 491                         return ne;
 492
 493                 ne = ne->hashlink;                  /* next element in external chain */
 494         }
 495
 496         /* return entry, if no entry was found, ne is NULL */
 497
 498         return ne;
 499 }
 500 #endif /* !defined(WITH_STATIC_CLASSPATH) */
 501
 502
 503 /* native_findfunction *********************************************************
 504
 505    Looks up a method (must have the same class name, method name,
 506    descriptor and 'static'ness) and returns a function pointer to it.
 507    Returns: function pointer or NULL (if there is no such method)
 508
 509    Remark: For faster operation, the names/descriptors are converted
 510    from C strings to Unicode the first time this function is called.
 511
 512 *******************************************************************************/
 513
 514 #if defined(WITH_STATIC_CLASSPATH)
 515 functionptr native_findfunction(utf *cname, utf *mname, utf *desc,
 516                                                                 bool isstatic)
 517 {
 518         /* entry of table for fast string comparison */
 519         struct nativecompref *n;
 520         s4 i;
 521
 522         isstatic = isstatic ? true : false;
 523
 524         if (!nativecompdone) {
 525                 for (i = 0; i < NATIVETABLESIZE; i++) {
 526                         nativecomptable[i].classname  =
 527                                 utf_new_char(nativetable[i].classname);
 528
 529                         nativecomptable[i].methodname =
 530                                 utf_new_char(nativetable[i].methodname);
 531
 532                         nativecomptable[i].descriptor =
 533                                 utf_new_char(nativetable[i].descriptor);
 534
 535                         nativecomptable[i].isstatic   = nativetable[i].isstatic;
 536                         nativecomptable[i].func       = nativetable[i].func;
 537                 }
 538
 539                 nativecompdone = true;
 540         }
 541
 542         for (i = 0; i < NATIVETABLESIZE; i++) {
 543                 n = &(nativecomptable[i]);
 544
 545                 if (cname == n->classname && mname == n->methodname &&
 546                     desc == n->descriptor && isstatic == n->isstatic)
 547                         return n->func;
 548         }
 549
 550
 551         /* no function was found, throw exception */
 552
 553         *exceptionptr =
 554                         new_exception_utfmessage(string_java_lang_UnsatisfiedLinkError,
 555                                                                          mname);
 556
 557         return NULL;
 558 }
 559 #endif /* defined(WITH_STATIC_CLASSPATH) */
 560
 561
 562 /* native_make_overloaded_function *********************************************
 563
 564    XXX
 565
 566 *******************************************************************************/
 567
 568 #if !defined(WITH_STATIC_CLASSPATH)
 569 static char *native_make_overloaded_function(char *name, utf *desc)
 570 {
 571         char *newname;
 572         s4    namelen;
 573         char *utf_ptr;
 574         u2    c;
 575         s4    i;
 576
 577         utf_ptr = desc->text;
 578         namelen = strlen(name) + strlen("__") + strlen("0");
 579
 580         /* calculate additional length */
 581
 582         while ((c = utf_nextu2(&utf_ptr)) != ')') {
 583                 switch (c) {
 584                 case 'Z':
 585                 case 'B':
 586                 case 'C':
 587                 case 'S':
 588                 case 'I':
 589                 case 'J':
 590                 case 'F':
 591                 case 'D':
 592                         namelen++;
 593                         break;
 594                 case '[':
 595                         namelen += 2;
 596                         break;
 597                 case 'L':
 598                         namelen++;
 599                         while (utf_nextu2(&utf_ptr) != ';')
 600                                 namelen++;
 601                         namelen += 2;
 602                         break;
 603                 case '(':
 604                         break;
 605                 default:
 606                         assert(0);
 607                 }
 608         }
 609
 610
 611         /* reallocate memory */
 612
 613         i = strlen(name);
 614
 615         newname = DMNEW(char, namelen);
 616         MCOPY(newname, name, char, i);
 617
 618         utf_ptr = desc->text;
 619
 620         newname[i++] = '_';
 621         newname[i++] = '_';
 622
 623         while ((c = utf_nextu2(&utf_ptr)) != ')') {
 624                 switch (c) {
 625                 case 'Z':
 626                 case 'B':
 627                 case 'C':
 628                 case 'S':
 629                 case 'J':
 630                 case 'I':
 631                 case 'F':
 632                 case 'D':
 633                         newname[i++] = c;
 634                         break;
 635                 case '[':
 636                         newname[i++] = '_';
 637                         newname[i++] = '3';
 638                         break;
 639                 case 'L':
 640                         newname[i++] = 'L';
 641                         while ((c = utf_nextu2(&utf_ptr)) != ';')
 642                                 if (((c >= 'a') && (c <= 'z')) ||
 643                                         ((c >= 'A') && (c <= 'Z')) ||
 644                                         ((c >= '0') && (c <= '9')))
 645                                         newname[i++] = c;
 646                                 else
 647                                         newname[i++] = '_';
 648                         newname[i++] = '_';
 649                         newname[i++] = '2';
 650                         break;
 651                 case '(':
 652                         break;
 653                 default:
 654                         assert(0);
 655                 }
 656         }
 657
 658         /* close string */
 659
 660         newname[i] = '\0';
 661
 662         return newname;
 663 }
 664
 665
 666 /* native_insert_char **********************************************************
 667
 668    Inserts the passed UTF character into the native method name.  If
 669    necessary it is escaped properly.
 670
 671 *******************************************************************************/
 672
 673 static s4 native_insert_char(char *name, u4 pos, u2 c)
 674 {
 675         s4 val;
 676         s4 i;
 677
 678         switch (c) {
 679         case '/':
 680         case '.':
 681                 /* replace '/' or '.' with '_' */
 682                 name[pos] = '_';
 683                 break;
 684
 685         case '_':
 686                 /* escape sequence for '_' is '_1' */
 687                 name[pos]   = '_';
 688                 name[++pos] = '1';
 689                 break;
 690
 691         case ';':
 692                 /* escape sequence for ';' is '_2' */
 693                 name[pos]   = '_';
 694                 name[++pos] = '2';
 695                 break;
 696
 697         case '[':
 698                 /* escape sequence for '[' is '_1' */
 699                 name[pos]   = '_';
 700                 name[++pos] = '3';
 701                 break;
 702
 703         default:
 704                 if (isalnum(c))
 705                         name[pos] = c;
 706                 else {
 707                         /* unicode character */
 708                         name[pos]   = '_';
 709                         name[++pos] = '0';
 710
 711                         for (i = 0; i < 4; ++i) {
 712                                 val = c & 0x0f;
 713                                 name[pos + 4 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
 714                                 c >>= 4;
 715                         }
 716
 717                         pos += 4;
 718                 }
 719                 break;
 720         }
 721
 722         /* return the new buffer index */
 723
 724         return pos;
 725 }
 726
 727
 728 /* native_resolve_function *****************************************************
 729
 730    Resolves a native function, maybe from a dynamic library.
 731
 732 *******************************************************************************/
 733
 734 functionptr native_resolve_function(methodinfo *m)
 735 {
 736         lt_ptr                          sym;
 737         char                           *name;
 738         char                           *newname;
 739         s4                              namelen;
 740         char                           *utf_ptr;
 741         char                           *utf_endptr;
 742         u2                              c;
 743         u4                              pos;
 744         s4                              dumpsize;
 745         hashtable_library_loader_entry *le;
 746         hashtable_library_name_entry   *ne;
 747         u4                              key;    /* hashkey                        */
 748         u4                              slot;   /* slot in hashtable              */
 749
 750         /* verbose output */
 751
 752         if (opt_verbosejni) {
 753                 printf("[Dynamic-linking native method ");
 754                 utf_display_printable_ascii_classname(m->class->name);
 755                 printf(".");
 756                 utf_display_printable_ascii(m->name);
 757                 printf(" ... ");
 758         }
 759
 760         /* Calculate length of native function name.  We multiply the
 761            class and method name length by 6 as this is the maxium
 762            escape-sequence that can be generated (unicode). */
 763
 764         namelen = strlen("Java_") +
 765                 utf_get_number_of_u2s(m->class->name) * 6 +
 766                 strlen("_") +
 767                 utf_get_number_of_u2s(m->name) * 6 +
 768                 strlen("0");
 769
 770         /* allocate memory */
 771
 772         dumpsize = dump_size();
 773
 774         name = DMNEW(char, namelen);
 775
 776         /* generate name of native functions */
 777
 778         strcpy(name, "Java_");
 779         pos = strlen("Java_");
 780
 781         utf_ptr    = m->class->name->text;
 782         utf_endptr = UTF_END(m->class->name);
 783
 784         for (; utf_ptr < utf_endptr; utf_ptr++, pos++) {
 785                 c   = *utf_ptr;
 786                 pos = native_insert_char(name, pos, c);
 787         }
 788
 789         /* seperator between class and method */
 790
 791         name[pos++] = '_';
 792
 793         utf_ptr    = m->name->text;
 794         utf_endptr = UTF_END(m->name);
 795
 796         for (; utf_ptr < utf_endptr; utf_ptr++, pos++) {
 797                 c   = *utf_ptr;
 798                 pos = native_insert_char(name, pos, c);
 799         }
 800
 801         /* close string */
 802
 803         name[pos] = '\0';
 804
 805         /* check for an buffer overflow */
 806
 807         assert(pos <= namelen);
 808
 809         /* generate overloaded function (having the types in it's name)           */
 810
 811         newname = native_make_overloaded_function(name, m->descriptor);
 812
 813         /* check the library hash entries of the classloader of the
 814            methods's class  */
 815
 816         sym = NULL;
 817
 818         /* normally addresses are aligned to 4, 8 or 16 bytes */
 819
 820         key  = ((u4) (ptrint) m->class->classloader) >> 4;    /* align to 16-byte */
 821         slot = key & (hashtable_library->size - 1);
 822         le   = hashtable_library->ptr[slot];
 823
 824         /* iterate through loaders in this hash slot */
 825
 826         while ((le != NULL) && (sym == NULL)) {
 827                 /* iterate through names in this loader */
 828
 829                 ne = le->namelink;
 830
 831                 while ((ne != NULL) && (sym == NULL)) {
 832                         sym = lt_dlsym(ne->handle, name);
 833
 834                         if (sym == NULL)
 835                                 sym = lt_dlsym(ne->handle, newname);
 836
 837                         ne = ne->hashlink;
 838                 }
 839
 840                 le = le->hashlink;
 841         }
 842
 843         if (sym != NULL)
 844                 if (opt_verbosejni)
 845                         printf("JNI ]\n");
 846
 847
 848         /* If not found, try to find the native function symbol in the
 849            main program. */
 850
 851         if (sym == NULL) {
 852                 sym = lt_dlsym(mainhandle, name);
 853
 854                 if (sym == NULL)
 855                         sym = lt_dlsym(mainhandle, newname);
 856
 857                 if (sym != NULL)
 858                         if (opt_verbosejni)
 859                                 printf("internal ]\n");
 860         }
 861
 862
 863 #if defined(ENABLE_JVMTI)
 864         /* fire Native Method Bind event */
 865         if (jvmti) jvmti_NativeMethodBind(m, sym, &sym);
 866 #endif
 867
 868         /* no symbol found? throw exception */
 869
 870         if (sym == NULL) {
 871                 if (opt_verbosejni)
 872                         printf("failed ]\n");
 873
 874                 *exceptionptr =
 875                         new_exception_utfmessage(string_java_lang_UnsatisfiedLinkError,
 876                                                                          m->name);
 877         }
 878
 879         /* release memory */
 880
 881         dump_release(dumpsize);
 882
 883         return (functionptr) (ptrint) sym;
 884 }
 885 #endif /* !defined(WITH_STATIC_CLASSPATH) */
 886
 887
 888 /* native_new_and_init *********************************************************
 889
 890    Creates a new object on the heap and calls the initializer.
 891    Returns the object pointer or NULL if memory is exhausted.
 892
 893 *******************************************************************************/
 894
 895 java_objectheader *native_new_and_init(classinfo *c)
 896 {
 897         methodinfo *m;
 898         java_objectheader *o;
 899
 900         if (!c)
 901                 return *exceptionptr;
 902
 903         /* create object */
 904
 905         o = builtin_new(c);
 906
 907         if (!o)
 908                 return NULL;
 909
 910         /* try to find the initializer */
 911
 912         m = class_findmethod(c, utf_init, utf_void__void);
 913
 914         /* ATTENTION: returning the object here is ok, since the class may
 915        not have an initializer */
 916
 917         if (!m)
 918                 return o;
 919
 920         /* call initializer */
 921
 922         (void) vm_call_method(m, o);
 923
 924         return o;
 925 }
 926
 927
 928 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
 929 {
 930         methodinfo *m;
 931         java_objectheader *o;
 932
 933         if (!c)
 934                 return *exceptionptr;
 935
 936         /* create object */
 937
 938         o = builtin_new(c);
 939
 940         if (!o)
 941                 return NULL;
 942
 943         /* find initializer */
 944
 945         m = class_resolveclassmethod(c,
 946                                                                  utf_init,
 947                                                                  utf_java_lang_String__void,
 948                                                                  NULL,
 949                                                                  true);
 950
 951         /* initializer not found */
 952
 953         if (!m)
 954                 return NULL;
 955
 956         /* call initializer */
 957
 958         (void) vm_call_method(m, o, s);
 959
 960         return o;
 961 }
 962
 963
 964 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
 965 {
 966         methodinfo *m;
 967         java_objectheader *o;
 968
 969         if (!c)
 970                 return *exceptionptr;
 971
 972         /* create object */
 973
 974         o = builtin_new(c);
 975
 976         if (!o)
 977                 return NULL;
 978
 979         /* find initializer */
 980
 981         m = class_resolveclassmethod(c, utf_init, utf_int__void, NULL, true);
 982
 983         /* initializer not found  */
 984
 985         if (!m)
 986                 return NULL;
 987
 988         /* call initializer */
 989
 990         (void) vm_call_method(m, o, i);
 991
 992         return o;
 993 }
 994
 995
 996 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
 997 {
 998         methodinfo *m;
 999         java_objectheader *o;
1000
1001         if (!c)
1002                 return *exceptionptr;
1003
1004         /* create object */
1005
1006         o = builtin_new(c);
1007
1008         if (!o)
1009                 return NULL;
1010
1011         /* find initializer */
1012
1013         m = class_findmethod(c, utf_init, utf_java_lang_Throwable__void);
1014
1015         /* initializer not found */
1016
1017         if (!m)
1018                 return NULL;
1019
1020         /* call initializer */
1021
1022         (void) vm_call_method(m, o, t);
1023
1024         return o;
1025 }
1026
1027
1028 /* native_get_parametertypes ***************************************************
1029
1030    Use the descriptor of a method to generate a java/lang/Class array
1031    which contains the classes of the parametertypes of the method.
1032
1033 *******************************************************************************/
1034
1035 java_objectarray *native_get_parametertypes(methodinfo *m)
1036 {
1037         methoddesc       *md;
1038         typedesc         *paramtypes;
1039         s4                paramcount;
1040     java_objectarray *oa;
1041         s4                i;
1042
1043         md = m->parseddesc;
1044
1045         /* is the descriptor fully parsed? */
1046
1047         if (!m->parseddesc->params)
1048                 if (!descriptor_params_from_paramtypes(md, m->flags))
1049                         return NULL;
1050
1051         paramtypes = md->paramtypes;
1052         paramcount = md->paramcount;
1053
1054         /* skip `this' pointer */
1055
1056         if (!(m->flags & ACC_STATIC)) {
1057                 paramtypes++;
1058                 paramcount--;
1059         }
1060
1061         /* create class-array */
1062
1063         oa = builtin_anewarray(paramcount, class_java_lang_Class);
1064
1065         if (!oa)
1066                 return NULL;
1067
1068     /* get classes */
1069
1070         for (i = 0; i < paramcount; i++)
1071                 if (!resolve_class_from_typedesc(&paramtypes[i], true, false,
1072                                                                                  (classinfo **) &oa->data[i]))
1073                         return NULL;
1074
1075         return oa;
1076 }
1077
1078
1079 /* native_get_exceptiontypes ***************************************************
1080
1081    Get the exceptions which can be thrown by a method.
1082
1083 *******************************************************************************/
1084
1085 java_objectarray *native_get_exceptiontypes(methodinfo *m)
1086 {
1087         java_objectarray *oa;
1088         classinfo        *c;
1089         u2                i;
1090
1091         /* create class-array */
1092
1093         oa = builtin_anewarray(m->thrownexceptionscount, class_java_lang_Class);
1094
1095         if (!oa)
1096                 return NULL;
1097
1098         for (i = 0; i < m->thrownexceptionscount; i++) {
1099                 if (!resolve_classref_or_classinfo(NULL, m->thrownexceptions[i],
1100                                                                                    resolveEager, true, false, &c))
1101                         return NULL;
1102
1103                 oa->data[i] = (java_objectheader *) c;
1104         }
1105
1106         return oa;
1107 }
1108
1109
1110 /* native_get_returntype *******************************************************
1111
1112    Get the returntype class of a method.
1113
1114 *******************************************************************************/
1115
1116 classinfo *native_get_returntype(methodinfo *m)
1117 {
1118         classinfo *c;
1119
1120         if (!resolve_class_from_typedesc(&(m->parseddesc->returntype), true, false,
1121                                                                          &c))
1122                 return NULL;
1123
1124         return c;
1125 }
1126
1127
1128 /*
1129  * These are local overrides for various environment variables in Emacs.
1130  * Please do not remove this and leave it at the end of the file, where
1131  * Emacs will automagically detect them.
1132  * ---------------------------------------------------------------------
1133  * Local variables:
1134  * mode: c
1135  * indent-tabs-mode: t
1136  * c-basic-offset: 4
1137  * tab-width: 4
1138  * End:
1139  */