libjava/jni.cc

   1 // jni.cc - JNI implementation, including the jump table.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #include <config.h>
  12
  13 #include <stddef.h>
  14 #include <string.h>
  15
  16 // Define this before including jni.h.
  17 #define __GCJ_JNI_IMPL__
  18
  19 #include <gcj/cni.h>
  20 #include <jvm.h>
  21 #include <java-assert.h>
  22 #include <jni.h>
  23 #ifdef ENABLE_JVMPI
  24 #include <jvmpi.h>
  25 #endif
  26
  27 #include <java/lang/Class.h>
  28 #include <java/lang/ClassLoader.h>
  29 #include <java/lang/Throwable.h>
  30 #include <java/lang/ArrayIndexOutOfBoundsException.h>
  31 #include <java/lang/StringIndexOutOfBoundsException.h>
  32 #include <java/lang/AbstractMethodError.h>
  33 #include <java/lang/InstantiationException.h>
  34 #include <java/lang/NoSuchFieldError.h>
  35 #include <java/lang/NoSuchMethodError.h>
  36 #include <java/lang/reflect/Constructor.h>
  37 #include <java/lang/reflect/Method.h>
  38 #include <java/lang/reflect/Modifier.h>
  39 #include <java/lang/OutOfMemoryError.h>
  40 #include <java/util/Hashtable.h>
  41 #include <java/lang/Integer.h>
  42 #include <java/lang/ThreadGroup.h>
  43 #include <gnu/gcj/jni/NativeThread.h>
  44
  45 #include <gcj/method.h>
  46 #include <gcj/field.h>
  47
  48 #include <java-interp.h>
  49
  50 // FIXME: remove these defines.
  51 #define ClassClass java::lang::Class::class$
  52 #define ObjectClass java::lang::Object::class$
  53 #define ThrowableClass java::lang::Throwable::class$
  54 #define MethodClass java::lang::reflect::Method::class$
  55 #define ThreadGroupClass java::lang::ThreadGroup::class$
  56 #define NativeThreadClass gnu::gcj::jni::NativeThread::class$
  57
  58 // This enum is used to select different template instantiations in
  59 // the invocation code.
  60 enum invocation_type
  61 {
  62   normal,
  63   nonvirtual,
  64   static_type,
  65   constructor
  66 };
  67
  68 // Forward declarations.
  69 extern struct JNINativeInterface _Jv_JNIFunctions;
  70 extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
  71
  72 // Number of slots in the default frame.  The VM must allow at least
  73 // 16.
  74 #define FRAME_SIZE 32
  75
  76 // Mark value indicating this is an overflow frame.
  77 #define MARK_NONE    0
  78 // Mark value indicating this is a user frame.
  79 #define MARK_USER    1
  80 // Mark value indicating this is a system frame.
  81 #define MARK_SYSTEM  2
  82
  83 // This structure is used to keep track of local references.
  84 struct _Jv_JNI_LocalFrame
  85 {
  86   // This is true if this frame object represents a pushed frame (eg
  87   // from PushLocalFrame).
  88   int marker :  2;
  89
  90   // Number of elements in frame.
  91   int size   : 30;
  92
  93   // Next frame in chain.
  94   _Jv_JNI_LocalFrame *next;
  95
  96   // The elements.  These are allocated using the C "struct hack".
  97   jobject vec[0];
  98 };
  99
 100 // This holds a reference count for all local and global references.
 101 static java::util::Hashtable *ref_table;
 102
 103 // The only VM.
 104 static JavaVM *the_vm;
 105
 106 #ifdef ENABLE_JVMPI
 107 // The only JVMPI interface description.
 108 static JVMPI_Interface _Jv_JVMPI_Interface;
 109
 110 static jint
 111 jvmpiEnableEvent (jint event_type, void *)
 112 {
 113   switch (event_type)
 114     {
 115     case JVMPI_EVENT_OBJECT_ALLOC:
 116       _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
 117       break;
 118
 119     case JVMPI_EVENT_THREAD_START:
 120       _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
 121       break;
 122
 123     case JVMPI_EVENT_THREAD_END:
 124       _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
 125       break;
 126
 127     default:
 128       return JVMPI_NOT_AVAILABLE;
 129     }
 130
 131   return JVMPI_SUCCESS;
 132 }
 133
 134 static jint
 135 jvmpiDisableEvent (jint event_type, void *)
 136 {
 137   switch (event_type)
 138     {
 139     case JVMPI_EVENT_OBJECT_ALLOC:
 140       _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
 141       break;
 142
 143     default:
 144       return JVMPI_NOT_AVAILABLE;
 145     }
 146
 147   return JVMPI_SUCCESS;
 148 }
 149 #endif
 150
 151 \f
 152
 153 void
 154 _Jv_JNI_Init (void)
 155 {
 156   ref_table = new java::util::Hashtable;
 157
 158 #ifdef ENABLE_JVMPI
 159   _Jv_JVMPI_Interface.version = 1;
 160   _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
 161   _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
 162   _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
 163   _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
 164   _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
 165 #endif
 166 }
 167
 168 // Tell the GC that a certain pointer is live.
 169 static void
 170 mark_for_gc (jobject obj)
 171 {
 172   JvSynchronize sync (ref_table);
 173
 174   using namespace java::lang;
 175   Integer *refcount = (Integer *) ref_table->get (obj);
 176   jint val = (refcount == NULL) ? 0 : refcount->intValue ();
 177   // FIXME: what about out of memory error?
 178   ref_table->put (obj, new Integer (val + 1));
 179 }
 180
 181 // Unmark a pointer.
 182 static void
 183 unmark_for_gc (jobject obj)
 184 {
 185   JvSynchronize sync (ref_table);
 186
 187   using namespace java::lang;
 188   Integer *refcount = (Integer *) ref_table->get (obj);
 189   JvAssert (refcount);
 190   jint val = refcount->intValue () - 1;
 191   if (val == 0)
 192     ref_table->remove (obj);
 193   else
 194     // FIXME: what about out of memory error?
 195     ref_table->put (obj, new Integer (val));
 196 }
 197
 198 \f
 199
 200 static jobject
 201 _Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
 202 {
 203   mark_for_gc (obj);
 204   return obj;
 205 }
 206
 207 static void
 208 _Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
 209 {
 210   unmark_for_gc (obj);
 211 }
 212
 213 static void
 214 _Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
 215 {
 216   _Jv_JNI_LocalFrame *frame;
 217
 218   for (frame = env->locals; frame != NULL; frame = frame->next)
 219     {
 220       for (int i = 0; i < FRAME_SIZE; ++i)
 221         {
 222           if (frame->vec[i] == obj)
 223             {
 224               frame->vec[i] = NULL;
 225               unmark_for_gc (obj);
 226               return;
 227             }
 228         }
 229
 230       // Don't go past a marked frame.
 231       JvAssert (frame->marker == MARK_NONE);
 232     }
 233
 234   JvAssert (0);
 235 }
 236
 237 static jint
 238 _Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
 239 {
 240   // It is easier to just always allocate a new frame of the requested
 241   // size.  This isn't the most efficient thing, but for now we don't
 242   // care.  Note that _Jv_JNI_PushLocalFrame relies on this right now.
 243
 244   _Jv_JNI_LocalFrame *frame;
 245   try
 246     {
 247       frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
 248                                                  + size * sizeof (jobject));
 249     }
 250   catch (jthrowable t)
 251     {
 252       env->ex = t;
 253       return JNI_ERR;
 254     }
 255
 256   frame->marker = MARK_NONE;
 257   frame->size = size;
 258   memset (&frame->vec[0], 0, size * sizeof (jobject));
 259   frame->next = env->locals;
 260   env->locals = frame;
 261
 262   return 0;
 263 }
 264
 265 static jint
 266 _Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
 267 {
 268   jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
 269   if (r < 0)
 270     return r;
 271
 272   // The new frame is on top.
 273   env->locals->marker = MARK_USER;
 274
 275   return 0;
 276 }
 277
 278 static jobject
 279 _Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
 280 {
 281   // Try to find an open slot somewhere in the topmost frame.
 282   _Jv_JNI_LocalFrame *frame = env->locals;
 283   bool done = false, set = false;
 284   while (frame != NULL && ! done)
 285     {
 286       for (int i = 0; i < frame->size; ++i)
 287         if (frame->vec[i] == NULL)
 288           {
 289             set = true;
 290             done = true;
 291             frame->vec[i] = obj;
 292             break;
 293           }
 294     }
 295
 296   if (! set)
 297     {
 298       // No slots, so we allocate a new frame.  According to the spec
 299       // we could just die here.  FIXME: return value.
 300       _Jv_JNI_EnsureLocalCapacity (env, 16);
 301       // We know the first element of the new frame will be ok.
 302       env->locals->vec[0] = obj;
 303     }
 304
 305   mark_for_gc (obj);
 306   return obj;
 307 }
 308
 309 static jobject
 310 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result, int stop)
 311 {
 312   _Jv_JNI_LocalFrame *rf = env->locals;
 313
 314   bool done = false;
 315   while (rf != NULL && ! done)
 316     {
 317       for (int i = 0; i < rf->size; ++i)
 318         if (rf->vec[i] != NULL)
 319           unmark_for_gc (rf->vec[i]);
 320
 321       // If the frame we just freed is the marker frame, we are done.
 322       done = (rf->marker == stop);
 323
 324       _Jv_JNI_LocalFrame *n = rf->next;
 325       // When N==NULL, we've reached the stack-allocated frame, and we
 326       // must not free it.  However, we must be sure to clear all its
 327       // elements, since we might conceivably reuse it.
 328       if (n == NULL)
 329         {
 330           memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
 331           break;
 332         }
 333
 334       _Jv_Free (rf);
 335       rf = n;
 336     }
 337
 338   return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
 339 }
 340
 341 static jobject
 342 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
 343 {
 344   return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
 345 }
 346
 347 // Pop a `system' frame from the stack.  This is `extern "C"' as it is
 348 // used by the compiler.
 349 extern "C" void
 350 _Jv_JNI_PopSystemFrame (JNIEnv *env)
 351 {
 352   _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
 353
 354   if (env->ex)
 355     {
 356       jthrowable t = env->ex;
 357       env->ex = NULL;
 358       throw t;
 359     }
 360 }
 361
 362 // This function is used from other template functions.  It wraps the
 363 // return value appropriately; we specialize it so that object returns
 364 // are turned into local references.
 365 template<typename T>
 366 static T
 367 wrap_value (JNIEnv *, T value)
 368 {
 369   return value;
 370 }
 371
 372 template<>
 373 static jobject
 374 wrap_value (JNIEnv *env, jobject value)
 375 {
 376   return value == NULL ? value : _Jv_JNI_NewLocalRef (env, value);
 377 }
 378
 379 \f
 380
 381 static jint
 382 _Jv_JNI_GetVersion (JNIEnv *)
 383 {
 384   return JNI_VERSION_1_2;
 385 }
 386
 387 static jclass
 388 _Jv_JNI_DefineClass (JNIEnv *env, jobject loader,
 389                      const jbyte *buf, jsize bufLen)
 390 {
 391   try
 392     {
 393       jbyteArray bytes = JvNewByteArray (bufLen);
 394
 395       jbyte *elts = elements (bytes);
 396       memcpy (elts, buf, bufLen * sizeof (jbyte));
 397
 398       java::lang::ClassLoader *l
 399         = reinterpret_cast<java::lang::ClassLoader *> (loader);
 400
 401       jclass result = l->defineClass (bytes, 0, bufLen);
 402       return (jclass) wrap_value (env, result);
 403     }
 404   catch (jthrowable t)
 405     {
 406       env->ex = t;
 407       return NULL;
 408     }
 409 }
 410
 411 static jclass
 412 _Jv_JNI_FindClass (JNIEnv *env, const char *name)
 413 {
 414   // FIXME: assume that NAME isn't too long.
 415   int len = strlen (name);
 416   char s[len + 1];
 417   for (int i = 0; i <= len; ++i)
 418     s[i] = (name[i] == '/') ? '.' : name[i];
 419
 420   jclass r = NULL;
 421   try
 422     {
 423       // This might throw an out of memory exception.
 424       jstring n = JvNewStringUTF (s);
 425
 426       java::lang::ClassLoader *loader = NULL;
 427       if (env->klass != NULL)
 428         loader = env->klass->getClassLoader ();
 429
 430       if (loader == NULL)
 431         {
 432           // FIXME: should use getBaseClassLoader, but we don't have that
 433           // yet.
 434           loader = java::lang::ClassLoader::getSystemClassLoader ();
 435         }
 436
 437       r = loader->loadClass (n);
 438     }
 439   catch (jthrowable t)
 440     {
 441       env->ex = t;
 442     }
 443
 444   return (jclass) wrap_value (env, r);
 445 }
 446
 447 static jclass
 448 _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
 449 {
 450   return (jclass) wrap_value (env, clazz->getSuperclass ());
 451 }
 452
 453 static jboolean
 454 _Jv_JNI_IsAssignableFrom(JNIEnv *, jclass clazz1, jclass clazz2)
 455 {
 456   return clazz1->isAssignableFrom (clazz2);
 457 }
 458
 459 static jint
 460 _Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
 461 {
 462   // We check in case the user did some funky cast.
 463   JvAssert (obj != NULL && (&ThrowableClass)->isInstance (obj));
 464   env->ex = obj;
 465   return 0;
 466 }
 467
 468 static jint
 469 _Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
 470 {
 471   using namespace java::lang::reflect;
 472
 473   JvAssert ((&ThrowableClass)->isAssignableFrom (clazz));
 474
 475   int r = JNI_OK;
 476   try
 477     {
 478       JArray<jclass> *argtypes
 479         = (JArray<jclass> *) JvNewObjectArray (1, &ClassClass, NULL);
 480
 481       jclass *elts = elements (argtypes);
 482       elts[0] = &StringClass;
 483
 484       Constructor *cons = clazz->getConstructor (argtypes);
 485
 486       jobjectArray values = JvNewObjectArray (1, &StringClass, NULL);
 487       jobject *velts = elements (values);
 488       velts[0] = JvNewStringUTF (message);
 489
 490       jobject obj = cons->newInstance (values);
 491
 492       env->ex = reinterpret_cast<jthrowable> (obj);
 493     }
 494   catch (jthrowable t)
 495     {
 496       env->ex = t;
 497       r = JNI_ERR;
 498     }
 499
 500   return r;
 501 }
 502
 503 static jthrowable
 504 _Jv_JNI_ExceptionOccurred (JNIEnv *env)
 505 {
 506   return (jthrowable) wrap_value (env, env->ex);
 507 }
 508
 509 static void
 510 _Jv_JNI_ExceptionDescribe (JNIEnv *env)
 511 {
 512   if (env->ex != NULL)
 513     env->ex->printStackTrace();
 514 }
 515
 516 static void
 517 _Jv_JNI_ExceptionClear (JNIEnv *env)
 518 {
 519   env->ex = NULL;
 520 }
 521
 522 static jboolean
 523 _Jv_JNI_ExceptionCheck (JNIEnv *env)
 524 {
 525   return env->ex != NULL;
 526 }
 527
 528 static void
 529 _Jv_JNI_FatalError (JNIEnv *, const char *message)
 530 {
 531   JvFail (message);
 532 }
 533
 534 \f
 535
 536 static jboolean
 537 _Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
 538 {
 539   return obj1 == obj2;
 540 }
 541
 542 static jobject
 543 _Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
 544 {
 545   jobject obj = NULL;
 546   using namespace java::lang::reflect;
 547
 548   try
 549     {
 550       JvAssert (clazz && ! clazz->isArray ());
 551       if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
 552         env->ex = new java::lang::InstantiationException ();
 553       else
 554         {
 555           // FIXME: will this work for String?
 556           obj = JvAllocObject (clazz);
 557         }
 558     }
 559   catch (jthrowable t)
 560     {
 561       env->ex = t;
 562     }
 563
 564   return wrap_value (env, obj);
 565 }
 566
 567 static jclass
 568 _Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
 569 {
 570   JvAssert (obj);
 571   return (jclass) wrap_value (env, obj->getClass());
 572 }
 573
 574 static jboolean
 575 _Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
 576 {
 577   return clazz->isInstance(obj);
 578 }
 579
 580 \f
 581
 582 //
 583 // This section concerns method invocation.
 584 //
 585
 586 template<jboolean is_static>
 587 static jmethodID
 588 _Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
 589                         const char *name, const char *sig)
 590 {
 591   try
 592     {
 593       _Jv_InitClass (clazz);
 594
 595       _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
 596
 597       // FIXME: assume that SIG isn't too long.
 598       int len = strlen (sig);
 599       char s[len + 1];
 600       for (int i = 0; i <= len; ++i)
 601         s[i] = (sig[i] == '/') ? '.' : sig[i];
 602       _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
 603
 604       JvAssert (! clazz->isPrimitive());
 605
 606       using namespace java::lang::reflect;
 607
 608       while (clazz != NULL)
 609         {
 610           jint count = JvNumMethods (clazz);
 611           jmethodID meth = JvGetFirstMethod (clazz);
 612
 613           for (jint i = 0; i < count; ++i)
 614             {
 615               if (((is_static && Modifier::isStatic (meth->accflags))
 616                    || (! is_static && ! Modifier::isStatic (meth->accflags)))
 617                   && _Jv_equalUtf8Consts (meth->name, name_u)
 618                   && _Jv_equalUtf8Consts (meth->signature, sig_u))
 619                 return meth;
 620
 621               meth = meth->getNextMethod();
 622             }
 623
 624           clazz = clazz->getSuperclass ();
 625         }
 626
 627       env->ex = new java::lang::NoSuchMethodError ();
 628     }
 629   catch (jthrowable t)
 630     {
 631       env->ex = t;
 632     }
 633
 634   return NULL;
 635 }
 636
 637 // This is a helper function which turns a va_list into an array of
 638 // `jvalue's.  It needs signature information in order to do its work.
 639 // The array of values must already be allocated.
 640 static void
 641 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
 642 {
 643   jclass *arg_elts = elements (arg_types);
 644   for (int i = 0; i < arg_types->length; ++i)
 645     {
 646       if (arg_elts[i] == JvPrimClass (byte))
 647         values[i].b = va_arg (vargs, jbyte);
 648       else if (arg_elts[i] == JvPrimClass (short))
 649         values[i].s = va_arg (vargs, jshort);
 650       else if (arg_elts[i] == JvPrimClass (int))
 651         values[i].i = va_arg (vargs, jint);
 652       else if (arg_elts[i] == JvPrimClass (long))
 653         values[i].j = va_arg (vargs, jlong);
 654       else if (arg_elts[i] == JvPrimClass (float))
 655         values[i].f = va_arg (vargs, jfloat);
 656       else if (arg_elts[i] == JvPrimClass (double))
 657         values[i].d = va_arg (vargs, jdouble);
 658       else if (arg_elts[i] == JvPrimClass (boolean))
 659         values[i].z = va_arg (vargs, jboolean);
 660       else if (arg_elts[i] == JvPrimClass (char))
 661         values[i].c = va_arg (vargs, jchar);
 662       else
 663         {
 664           // An object.
 665           values[i].l = va_arg (vargs, jobject);
 666         }
 667     }
 668 }
 669
 670 // This can call any sort of method: virtual, "nonvirtual", static, or
 671 // constructor.
 672 template<typename T, invocation_type style>
 673 static T
 674 _Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
 675                         jmethodID id, va_list vargs)
 676 {
 677   if (style == normal)
 678     id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
 679
 680   jclass decl_class = klass ? klass : obj->getClass ();
 681   JvAssert (decl_class != NULL);
 682
 683   jclass return_type;
 684   JArray<jclass> *arg_types;
 685
 686   try
 687     {
 688       _Jv_GetTypesFromSignature (id, decl_class,
 689                                  &arg_types, &return_type);
 690
 691       jvalue args[arg_types->length];
 692       array_from_valist (args, arg_types, vargs);
 693
 694       // For constructors we need to pass the Class we are instantiating.
 695       if (style == constructor)
 696         return_type = klass;
 697
 698       jvalue result;
 699       jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
 700                                           style == constructor,
 701                                           arg_types, args, &result);
 702
 703       if (ex != NULL)
 704         env->ex = ex;
 705
 706       // We cheat a little here.  FIXME.
 707       return wrap_value (env, * (T *) &result);
 708     }
 709   catch (jthrowable t)
 710     {
 711       env->ex = t;
 712     }
 713
 714   return wrap_value (env, (T) 0);
 715 }
 716
 717 template<typename T, invocation_type style>
 718 static T
 719 _Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
 720                        jmethodID method, ...)
 721 {
 722   va_list args;
 723   T result;
 724
 725   va_start (args, method);
 726   result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
 727   va_end (args);
 728
 729   return result;
 730 }
 731
 732 template<typename T, invocation_type style>
 733 static T
 734 _Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
 735                         jmethodID id, jvalue *args)
 736 {
 737   if (style == normal)
 738     id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
 739
 740   jclass decl_class = klass ? klass : obj->getClass ();
 741   JvAssert (decl_class != NULL);
 742
 743   jclass return_type;
 744   JArray<jclass> *arg_types;
 745   try
 746     {
 747       _Jv_GetTypesFromSignature (id, decl_class,
 748                                  &arg_types, &return_type);
 749
 750       // For constructors we need to pass the Class we are instantiating.
 751       if (style == constructor)
 752         return_type = klass;
 753
 754       jvalue result;
 755       jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
 756                                           style == constructor,
 757                                           arg_types, args, &result);
 758
 759       if (ex != NULL)
 760         env->ex = ex;
 761
 762       // We cheat a little here.  FIXME.
 763       return wrap_value (env, * (T *) &result);
 764     }
 765   catch (jthrowable t)
 766     {
 767       env->ex = t;
 768     }
 769
 770   return wrap_value (env, (T) 0);
 771 }
 772
 773 template<invocation_type style>
 774 static void
 775 _Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
 776                             jmethodID id, va_list vargs)
 777 {
 778   if (style == normal)
 779     id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
 780
 781   jclass decl_class = klass ? klass : obj->getClass ();
 782   JvAssert (decl_class != NULL);
 783
 784   jclass return_type;
 785   JArray<jclass> *arg_types;
 786   try
 787     {
 788       _Jv_GetTypesFromSignature (id, decl_class,
 789                                  &arg_types, &return_type);
 790
 791       jvalue args[arg_types->length];
 792       array_from_valist (args, arg_types, vargs);
 793
 794       // For constructors we need to pass the Class we are instantiating.
 795       if (style == constructor)
 796         return_type = klass;
 797
 798       jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
 799                                           style == constructor,
 800                                           arg_types, args, NULL);
 801
 802       if (ex != NULL)
 803         env->ex = ex;
 804     }
 805   catch (jthrowable t)
 806     {
 807       env->ex = t;
 808     }
 809 }
 810
 811 template<invocation_type style>
 812 static void
 813 _Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
 814                            jmethodID method, ...)
 815 {
 816   va_list args;
 817
 818   va_start (args, method);
 819   _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
 820   va_end (args);
 821 }
 822
 823 template<invocation_type style>
 824 static void
 825 _Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
 826                             jmethodID id, jvalue *args)
 827 {
 828   if (style == normal)
 829     id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
 830
 831   jclass decl_class = klass ? klass : obj->getClass ();
 832   JvAssert (decl_class != NULL);
 833
 834   jclass return_type;
 835   JArray<jclass> *arg_types;
 836   try
 837     {
 838       _Jv_GetTypesFromSignature (id, decl_class,
 839                                  &arg_types, &return_type);
 840
 841       jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
 842                                           style == constructor,
 843                                           arg_types, args, NULL);
 844
 845       if (ex != NULL)
 846         env->ex = ex;
 847     }
 848   catch (jthrowable t)
 849     {
 850       env->ex = t;
 851     }
 852 }
 853
 854 // Functions with this signature are used to implement functions in
 855 // the CallMethod family.
 856 template<typename T>
 857 static T
 858 _Jv_JNI_CallMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
 859 {
 860   return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
 861 }
 862
 863 // Functions with this signature are used to implement functions in
 864 // the CallMethod family.
 865 template<typename T>
 866 static T
 867 _Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
 868 {
 869   va_list args;
 870   T result;
 871
 872   va_start (args, id);
 873   result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
 874   va_end (args);
 875
 876   return result;
 877 }
 878
 879 // Functions with this signature are used to implement functions in
 880 // the CallMethod family.
 881 template<typename T>
 882 static T
 883 _Jv_JNI_CallMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
 884 {
 885   return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
 886 }
 887
 888 static void
 889 _Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
 890 {
 891   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
 892 }
 893
 894 static void
 895 _Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
 896 {
 897   va_list args;
 898
 899   va_start (args, id);
 900   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
 901   va_end (args);
 902 }
 903
 904 static void
 905 _Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
 906 {
 907   _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
 908 }
 909
 910 // Functions with this signature are used to implement functions in
 911 // the CallStaticMethod family.
 912 template<typename T>
 913 static T
 914 _Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
 915                            jmethodID id, va_list args)
 916 {
 917   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
 918   JvAssert ((&ClassClass)->isInstance (klass));
 919
 920   return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
 921 }
 922
 923 // Functions with this signature are used to implement functions in
 924 // the CallStaticMethod family.
 925 template<typename T>
 926 static T
 927 _Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
 928 {
 929   va_list args;
 930   T result;
 931
 932   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
 933   JvAssert ((&ClassClass)->isInstance (klass));
 934
 935   va_start (args, id);
 936   result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
 937                                                    id, args);
 938   va_end (args);
 939
 940   return result;
 941 }
 942
 943 // Functions with this signature are used to implement functions in
 944 // the CallStaticMethod family.
 945 template<typename T>
 946 static T
 947 _Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
 948                            jvalue *args)
 949 {
 950   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
 951   JvAssert ((&ClassClass)->isInstance (klass));
 952
 953   return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
 954 }
 955
 956 static void
 957 _Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass, jmethodID id,
 958                                va_list args)
 959 {
 960   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
 961 }
 962
 963 static void
 964 _Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
 965 {
 966   va_list args;
 967
 968   va_start (args, id);
 969   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
 970   va_end (args);
 971 }
 972
 973 static void
 974 _Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass, jmethodID id,
 975                                jvalue *args)
 976 {
 977   _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
 978 }
 979
 980 static jobject
 981 _Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
 982                     jmethodID id, va_list args)
 983 {
 984   JvAssert (klass && ! klass->isArray ());
 985   JvAssert (! strcmp (id->name->data, "<init>")
 986             && id->signature->length > 2
 987             && id->signature->data[0] == '('
 988             && ! strcmp (&id->signature->data[id->signature->length - 2],
 989                          ")V"));
 990
 991   return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
 992                                                        id, args);
 993 }
 994
 995 static jobject
 996 _Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
 997 {
 998   JvAssert (klass && ! klass->isArray ());
 999   JvAssert (! strcmp (id->name->data, "<init>")
1000             && id->signature->length > 2
1001             && id->signature->data[0] == '('
1002             && ! strcmp (&id->signature->data[id->signature->length - 2],
1003                          ")V"));
1004
1005   va_list args;
1006   jobject result;
1007
1008   va_start (args, id);
1009   result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1010                                                          id, args);
1011   va_end (args);
1012
1013   return result;
1014 }
1015
1016 static jobject
1017 _Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
1018                     jvalue *args)
1019 {
1020   JvAssert (klass && ! klass->isArray ());
1021   JvAssert (! strcmp (id->name->data, "<init>")
1022             && id->signature->length > 2
1023             && id->signature->data[0] == '('
1024             && ! strcmp (&id->signature->data[id->signature->length - 2],
1025                          ")V"));
1026
1027   return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1028                                                        id, args);
1029 }
1030
1031 \f
1032
1033 template<typename T>
1034 static T
1035 _Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
1036 {
1037   JvAssert (obj);
1038   T *ptr = (T *) ((char *) obj + field->getOffset ());
1039   return wrap_value (env, *ptr);
1040 }
1041
1042 template<typename T>
1043 static void
1044 _Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
1045 {
1046   JvAssert (obj);
1047   T *ptr = (T *) ((char *) obj + field->getOffset ());
1048   *ptr = value;
1049 }
1050
1051 template<jboolean is_static>
1052 static jfieldID
1053 _Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
1054                        const char *name, const char *sig)
1055 {
1056   try
1057     {
1058       _Jv_InitClass (clazz);
1059
1060       _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1061
1062       // FIXME: assume that SIG isn't too long.
1063       int len = strlen (sig);
1064       char s[len + 1];
1065       for (int i = 0; i <= len; ++i)
1066         s[i] = (sig[i] == '/') ? '.' : sig[i];
1067       jclass field_class = _Jv_FindClassFromSignature ((char *) s, NULL);
1068
1069       // FIXME: what if field_class == NULL?
1070
1071       java::lang::ClassLoader *loader = clazz->getClassLoader ();
1072       while (clazz != NULL)
1073         {
1074           // We acquire the class lock so that fields aren't resolved
1075           // while we are running.
1076           JvSynchronize sync (clazz);
1077
1078           jint count = (is_static
1079                         ? JvNumStaticFields (clazz)
1080                         : JvNumInstanceFields (clazz));
1081           jfieldID field = (is_static
1082                             ? JvGetFirstStaticField (clazz)
1083                             : JvGetFirstInstanceField (clazz));
1084           for (jint i = 0; i < count; ++i)
1085             {
1086               _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1087
1088               // The field might be resolved or it might not be.  It
1089               // is much simpler to always resolve it.
1090               _Jv_ResolveField (field, loader);
1091               if (_Jv_equalUtf8Consts (f_name, a_name)
1092                   && field->getClass() == field_class)
1093                 return field;
1094
1095               field = field->getNextField ();
1096             }
1097
1098           clazz = clazz->getSuperclass ();
1099         }
1100
1101       env->ex = new java::lang::NoSuchFieldError ();
1102     }
1103   catch (jthrowable t)
1104     {
1105       env->ex = t;
1106     }
1107   return NULL;
1108 }
1109
1110 template<typename T>
1111 static T
1112 _Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
1113 {
1114   T *ptr = (T *) field->u.addr;
1115   return wrap_value (env, *ptr);
1116 }
1117
1118 template<typename T>
1119 static void
1120 _Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
1121 {
1122   T *ptr = (T *) field->u.addr;
1123   *ptr = value;
1124 }
1125
1126 static jstring
1127 _Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
1128 {
1129   try
1130     {
1131       jstring r = _Jv_NewString (unichars, len);
1132       return (jstring) wrap_value (env, r);
1133     }
1134   catch (jthrowable t)
1135     {
1136       env->ex = t;
1137       return NULL;
1138     }
1139 }
1140
1141 static jsize
1142 _Jv_JNI_GetStringLength (JNIEnv *, jstring string)
1143 {
1144   return string->length();
1145 }
1146
1147 static const jchar *
1148 _Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
1149 {
1150   jchar *result = _Jv_GetStringChars (string);
1151   mark_for_gc (string);
1152   if (isCopy)
1153     *isCopy = false;
1154   return (const jchar *) result;
1155 }
1156
1157 static void
1158 _Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
1159 {
1160   unmark_for_gc (string);
1161 }
1162
1163 static jstring
1164 _Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
1165 {
1166   try
1167     {
1168       jstring result = JvNewStringUTF (bytes);
1169       return (jstring) wrap_value (env, result);
1170     }
1171   catch (jthrowable t)
1172     {
1173       env->ex = t;
1174       return NULL;
1175     }
1176 }
1177
1178 static jsize
1179 _Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
1180 {
1181   return JvGetStringUTFLength (string);
1182 }
1183
1184 static const char *
1185 _Jv_JNI_GetStringUTFChars (JNIEnv *env, jstring string, jboolean *isCopy)
1186 {
1187   jsize len = JvGetStringUTFLength (string);
1188   try
1189     {
1190       char *r = (char *) _Jv_Malloc (len + 1);
1191       JvGetStringUTFRegion (string, 0, len, r);
1192       r[len] = '\0';
1193
1194       if (isCopy)
1195         *isCopy = true;
1196
1197       return (const char *) r;
1198     }
1199   catch (jthrowable t)
1200     {
1201       env->ex = t;
1202       return NULL;
1203     }
1204 }
1205
1206 static void
1207 _Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
1208 {
1209   _Jv_Free ((void *) utf);
1210 }
1211
1212 static void
1213 _Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start, jsize len,
1214                          jchar *buf)
1215 {
1216   jchar *result = _Jv_GetStringChars (string);
1217   if (start < 0 || start > string->length ()
1218       || len < 0 || start + len > string->length ())
1219     {
1220       try
1221         {
1222           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1223         }
1224       catch (jthrowable t)
1225         {
1226           env->ex = t;
1227         }
1228     }
1229   else
1230     memcpy (buf, &result[start], len * sizeof (jchar));
1231 }
1232
1233 static void
1234 _Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
1235                             jsize len, char *buf)
1236 {
1237   if (start < 0 || start > str->length ()
1238       || len < 0 || start + len > str->length ())
1239     {
1240       try
1241         {
1242           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1243         }
1244       catch (jthrowable t)
1245         {
1246           env->ex = t;
1247         }
1248     }
1249   else
1250     _Jv_GetStringUTFRegion (str, start, len, buf);
1251 }
1252
1253 static const jchar *
1254 _Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
1255 {
1256   jchar *result = _Jv_GetStringChars (str);
1257   if (isCopy)
1258     *isCopy = false;
1259   return result;
1260 }
1261
1262 static void
1263 _Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
1264 {
1265   // Nothing.
1266 }
1267
1268 static jsize
1269 _Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
1270 {
1271   return array->length;
1272 }
1273
1274 static jarray
1275 _Jv_JNI_NewObjectArray (JNIEnv *env, jsize length, jclass elementClass,
1276                         jobject init)
1277 {
1278   try
1279     {
1280       jarray result = JvNewObjectArray (length, elementClass, init);
1281       return (jarray) wrap_value (env, result);
1282     }
1283   catch (jthrowable t)
1284     {
1285       env->ex = t;
1286       return NULL;
1287     }
1288 }
1289
1290 static jobject
1291 _Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array, jsize index)
1292 {
1293   jobject *elts = elements (array);
1294   return wrap_value (env, elts[index]);
1295 }
1296
1297 static void
1298 _Jv_JNI_SetObjectArrayElement (JNIEnv *env, jobjectArray array, jsize index,
1299                                jobject value)
1300 {
1301   try
1302     {
1303       _Jv_CheckArrayStore (array, value);
1304       jobject *elts = elements (array);
1305       elts[index] = value;
1306     }
1307   catch (jthrowable t)
1308     {
1309       env->ex = t;
1310     }
1311 }
1312
1313 template<typename T, jclass K>
1314 static JArray<T> *
1315 _Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
1316 {
1317   try
1318     {
1319       return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1320     }
1321   catch (jthrowable t)
1322     {
1323       env->ex = t;
1324       return NULL;
1325     }
1326 }
1327
1328 template<typename T>
1329 static T *
1330 _Jv_JNI_GetPrimitiveArrayElements (JNIEnv *, JArray<T> *array,
1331                                    jboolean *isCopy)
1332 {
1333   T *elts = elements (array);
1334   if (isCopy)
1335     {
1336       // We elect never to copy.
1337       *isCopy = false;
1338     }
1339   mark_for_gc (array);
1340   return elts;
1341 }
1342
1343 template<typename T>
1344 static void
1345 _Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *, JArray<T> *array,
1346                                        T *, jint /* mode */)
1347 {
1348   // Note that we ignore MODE.  We can do this because we never copy
1349   // the array elements.  My reading of the JNI documentation is that
1350   // this is an option for the implementor.
1351   unmark_for_gc (array);
1352 }
1353
1354 template<typename T>
1355 static void
1356 _Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1357                                  jsize start, jsize len,
1358                                  T *buf)
1359 {
1360   if (start < 0 || len >= array->length || start + len >= array->length)
1361     {
1362       try
1363         {
1364           // FIXME: index.
1365           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1366         }
1367       catch (jthrowable t)
1368         {
1369           // Could have thown out of memory error.
1370           env->ex = t;
1371         }
1372     }
1373   else
1374     {
1375       T *elts = elements (array) + start;
1376       memcpy (buf, elts, len * sizeof (T));
1377     }
1378 }
1379
1380 template<typename T>
1381 static void
1382 _Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1383                                  jsize start, jsize len, T *buf)
1384 {
1385   if (start < 0 || len >= array->length || start + len >= array->length)
1386     {
1387       try
1388         {
1389           // FIXME: index.
1390           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1391         }
1392       catch (jthrowable t)
1393         {
1394           env->ex = t;
1395         }
1396     }
1397   else
1398     {
1399       T *elts = elements (array) + start;
1400       memcpy (elts, buf, len * sizeof (T));
1401     }
1402 }
1403
1404 static void *
1405 _Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
1406                                    jboolean *isCopy)
1407 {
1408   // FIXME: does this work?
1409   jclass klass = array->getClass()->getComponentType();
1410   JvAssert (klass->isPrimitive ());
1411   char *r = _Jv_GetArrayElementFromElementType (array, klass);
1412   if (isCopy)
1413     *isCopy = false;
1414   return r;
1415 }
1416
1417 static void
1418 _Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
1419 {
1420   // Nothing.
1421 }
1422
1423 static jint
1424 _Jv_JNI_MonitorEnter (JNIEnv *env, jobject obj)
1425 {
1426   try
1427     {
1428       return _Jv_MonitorEnter (obj);
1429     }
1430   catch (jthrowable t)
1431     {
1432       env->ex = t;
1433     }
1434   return JNI_ERR;
1435 }
1436
1437 static jint
1438 _Jv_JNI_MonitorExit (JNIEnv *env, jobject obj)
1439 {
1440   try
1441     {
1442       return _Jv_MonitorExit (obj);
1443     }
1444   catch (jthrowable t)
1445     {
1446       env->ex = t;
1447     }
1448   return JNI_ERR;
1449 }
1450
1451 // JDK 1.2
1452 jobject
1453 _Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
1454                           jboolean)
1455 {
1456   try
1457     {
1458       java::lang::reflect::Field *field = new java::lang::reflect::Field();
1459       field->declaringClass = cls;
1460       field->offset = (char*) fieldID - (char *) cls->fields;
1461       field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1462       return wrap_value (env, field);
1463     }
1464   catch (jthrowable t)
1465     {
1466       env->ex = t;
1467     }
1468   return NULL;
1469 }
1470
1471 // JDK 1.2
1472 static jfieldID
1473 _Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
1474 {
1475   using namespace java::lang::reflect;
1476
1477   Field *field = reinterpret_cast<Field *> (f);
1478   return _Jv_FromReflectedField (field);
1479 }
1480
1481 jobject
1482 _Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
1483                            jboolean)
1484 {
1485   using namespace java::lang::reflect;
1486
1487   // FIXME.
1488   static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
1489
1490   jobject result = NULL;
1491
1492   try
1493     {
1494       if (_Jv_equalUtf8Consts (id->name, init_name))
1495         {
1496           // A constructor.
1497           Constructor *cons = new Constructor ();
1498           cons->offset = (char *) id - (char *) &klass->methods;
1499           cons->declaringClass = klass;
1500           result = cons;
1501         }
1502       else
1503         {
1504           Method *meth = new Method ();
1505           meth->offset = (char *) id - (char *) &klass->methods;
1506           meth->declaringClass = klass;
1507           result = meth;
1508         }
1509     }
1510   catch (jthrowable t)
1511     {
1512       env->ex = t;
1513     }
1514
1515   return wrap_value (env, result);
1516 }
1517
1518 static jmethodID
1519 _Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
1520 {
1521   using namespace java::lang::reflect;
1522   if ((&MethodClass)->isInstance (method))
1523     return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1524   return
1525     _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1526 }
1527
1528 static jint
1529 _Jv_JNI_RegisterNatives (JNIEnv *env, jclass k,
1530                          const JNINativeMethod *methods,
1531                          jint nMethods)
1532 {
1533 #ifdef INTERPRETER
1534   // For now, this only matters for interpreted methods.  FIXME.
1535   if (! _Jv_IsInterpretedClass (k))
1536     {
1537       // FIXME: throw exception.
1538       return JNI_ERR;
1539     }
1540   _Jv_InterpClass *klass = reinterpret_cast<_Jv_InterpClass *> (k);
1541
1542   // Look at each descriptor given us, and find the corresponding
1543   // method in the class.
1544   for (int j = 0; j < nMethods; ++j)
1545     {
1546       bool found = false;
1547
1548       _Jv_MethodBase **imeths = _Jv_GetFirstMethod (klass);
1549       for (int i = 0; i < JvNumMethods (klass); ++i)
1550         {
1551           _Jv_MethodBase *meth = imeths[i];
1552           _Jv_Method *self = meth->get_method ();
1553
1554           if (! strcmp (self->name->data, methods[j].name)
1555               && ! strcmp (self->signature->data, methods[j].signature))
1556             {
1557               if (! (self->accflags
1558                      & java::lang::reflect::Modifier::NATIVE))
1559                 break;
1560
1561               // Found a match that is native.
1562               _Jv_JNIMethod *jmeth = reinterpret_cast<_Jv_JNIMethod *> (meth);
1563               jmeth->set_function (methods[i].fnPtr);
1564               found = true;
1565               break;
1566             }
1567         }
1568
1569       if (! found)
1570         {
1571           jstring m = JvNewStringUTF (methods[j].name);
1572           try
1573             {
1574               env->ex =new java::lang::NoSuchMethodError (m);
1575             }
1576           catch (jthrowable t)
1577             {
1578               env->ex = t;
1579             }
1580           return JNI_ERR;
1581         }
1582     }
1583
1584   return JNI_OK;
1585 #else /* INTERPRETER */
1586   return JNI_ERR;
1587 #endif /* INTERPRETER */
1588 }
1589
1590 static jint
1591 _Jv_JNI_UnregisterNatives (JNIEnv *, jclass)
1592 {
1593   return JNI_ERR;
1594 }
1595
1596 \f
1597
1598 #ifdef INTERPRETER
1599
1600 // Add a character to the buffer, encoding properly.
1601 static void
1602 add_char (char *buf, jchar c, int *here)
1603 {
1604   if (c == '_')
1605     {
1606       buf[(*here)++] = '_';
1607       buf[(*here)++] = '1';
1608     }
1609   else if (c == ';')
1610     {
1611       buf[(*here)++] = '_';
1612       buf[(*here)++] = '2';
1613     }
1614   else if (c == '[')
1615     {
1616       buf[(*here)++] = '_';
1617       buf[(*here)++] = '3';
1618     }
1619
1620   // Also check for `.' here because we might be passed an internal
1621   // qualified class name like `foo.bar'.
1622   else if (c == '/' || c == '.')
1623     buf[(*here)++] = '_';
1624   else if ((c >= '0' && c <= '9')
1625       || (c >= 'a' && c <= 'z')
1626       || (c >= 'A' && c <= 'Z'))
1627     buf[(*here)++] = (char) c;
1628   else
1629     {
1630       // "Unicode" character.
1631       buf[(*here)++] = '_';
1632       buf[(*here)++] = '0';
1633       for (int i = 0; i < 4; ++i)
1634         {
1635           int val = c & 0x0f;
1636           buf[(*here) + 4 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
1637           c >>= 4;
1638         }
1639       *here += 4;
1640     }
1641 }
1642
1643 // Compute a mangled name for a native function.  This computes the
1644 // long name, and also returns an index which indicates where a NUL
1645 // can be placed to create the short name.  This function assumes that
1646 // the buffer is large enough for its results.
1647 static void
1648 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
1649               _Jv_Utf8Const *signature, char *buf, int *long_start)
1650 {
1651   strcpy (buf, "Java_");
1652   int here = 5;
1653
1654   // Add fully qualified class name.
1655   jchar *chars = _Jv_GetStringChars (klass->getName ());
1656   jint len = klass->getName ()->length ();
1657   for (int i = 0; i < len; ++i)
1658     add_char (buf, chars[i], &here);
1659
1660   // Don't use add_char because we need a literal `_'.
1661   buf[here++] = '_';
1662
1663   const unsigned char *fn = (const unsigned char *) func_name->data;
1664   const unsigned char *limit = fn + func_name->length;
1665   for (int i = 0; ; ++i)
1666     {
1667       int ch = UTF8_GET (fn, limit);
1668       if (ch < 0)
1669         break;
1670       add_char (buf, ch, &here);
1671     }
1672
1673   // This is where the long signature begins.
1674   *long_start = here;
1675   buf[here++] = '_';
1676   buf[here++] = '_';
1677
1678   const unsigned char *sig = (const unsigned char *) signature->data;
1679   limit = sig + signature->length;
1680   JvAssert (sig[0] == '(');
1681   ++sig;
1682   while (1)
1683     {
1684       int ch = UTF8_GET (sig, limit);
1685       if (ch == ')' || ch < 0)
1686         break;
1687       add_char (buf, ch, &here);
1688     }
1689
1690   buf[here] = '\0';
1691 }
1692
1693 // Return the current thread's JNIEnv; if one does not exist, create
1694 // it.  Also create a new system frame for use.  This is `extern "C"'
1695 // because the compiler calls it.
1696 extern "C" JNIEnv *
1697 _Jv_GetJNIEnvNewFrame (jclass klass)
1698 {
1699   JNIEnv *env = _Jv_GetCurrentJNIEnv ();
1700   if (env == NULL)
1701     {
1702       env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
1703       env->p = &_Jv_JNIFunctions;
1704       env->ex = NULL;
1705       env->klass = klass;
1706       env->locals = NULL;
1707
1708       _Jv_SetCurrentJNIEnv (env);
1709     }
1710
1711   _Jv_JNI_LocalFrame *frame
1712     = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
1713                                                   + (FRAME_SIZE
1714                                                      * sizeof (jobject)));
1715
1716   frame->marker = MARK_SYSTEM;
1717   frame->size = FRAME_SIZE;
1718   frame->next = env->locals;
1719   env->locals = frame;
1720
1721   for (int i = 0; i < frame->size; ++i)
1722     frame->vec[i] = NULL;
1723
1724   return env;
1725 }
1726
1727 // Return the function which implements a particular JNI method.  If
1728 // we can't find the function, we throw the appropriate exception.
1729 // This is `extern "C"' because the compiler uses it.
1730 extern "C" void *
1731 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
1732                      _Jv_Utf8Const *signature)
1733 {
1734   char buf[10 + 6 * (name->length + signature->length)];
1735   int long_start;
1736   void *function;
1737
1738   mangled_name (klass, name, signature, buf, &long_start);
1739   char c = buf[long_start];
1740   buf[long_start] = '\0';
1741   function = _Jv_FindSymbolInExecutable (buf);
1742   if (function == NULL)
1743     {
1744       buf[long_start] = c;
1745       function = _Jv_FindSymbolInExecutable (buf);
1746       if (function == NULL)
1747         {
1748           jstring str = JvNewStringUTF (name->data);
1749           throw new java::lang::AbstractMethodError (str);
1750         }
1751     }
1752
1753   return function;
1754 }
1755
1756 // This function is the stub which is used to turn an ordinary (CNI)
1757 // method call into a JNI call.
1758 void
1759 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
1760 {
1761   _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
1762
1763   JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
1764
1765   // FIXME: we should mark every reference parameter as a local.  For
1766   // now we assume a conservative GC, and we assume that the
1767   // references are on the stack somewhere.
1768
1769   // We cache the value that we find, of course, but if we don't find
1770   // a value we don't cache that fact -- we might subsequently load a
1771   // library which finds the function in question.
1772   if (_this->function == NULL)
1773     _this->function = _Jv_LookupJNIMethod (_this->defining_class,
1774                                            _this->self->name,
1775                                            _this->self->signature);
1776
1777   JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
1778   ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
1779   int offset = 0;
1780
1781   // First argument is always the environment pointer.
1782   real_args[offset++].ptr = env;
1783
1784   // For a static method, we pass in the Class.  For non-static
1785   // methods, the `this' argument is already handled.
1786   if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
1787     real_args[offset++].ptr = _this->defining_class;
1788
1789   // Copy over passed-in arguments.
1790   memcpy (&real_args[offset], args, _this->args_raw_size);
1791
1792   // The actual call to the JNI function.
1793   ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
1794                 ret, real_args);
1795
1796   _Jv_JNI_PopSystemFrame (env);
1797 }
1798
1799 #endif /* INTERPRETER */
1800
1801 \f
1802
1803 //
1804 // Invocation API.
1805 //
1806
1807 // An internal helper function.
1808 static jint
1809 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv, void *args)
1810 {
1811   JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
1812   java::lang::ThreadGroup *group = NULL;
1813
1814   if (attach)
1815     {
1816       // FIXME: do we really want to support 1.1?
1817       if (attach->version != JNI_VERSION_1_2
1818           && attach->version != JNI_VERSION_1_1)
1819         return JNI_EVERSION;
1820
1821       JvAssert ((&ThreadGroupClass)->isInstance (attach->group));
1822       group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
1823     }
1824
1825   // Attaching an already-attached thread is a no-op.
1826   if (_Jv_GetCurrentJNIEnv () != NULL)
1827     return 0;
1828
1829   JNIEnv *env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
1830   if (env == NULL)
1831     return JNI_ERR;
1832   env->p = &_Jv_JNIFunctions;
1833   env->ex = NULL;
1834   env->klass = NULL;
1835   env->locals
1836     = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
1837                                                   + (FRAME_SIZE
1838                                                      * sizeof (jobject)));
1839   if (env->locals == NULL)
1840     {
1841       _Jv_Free (env);
1842       return JNI_ERR;
1843     }
1844   *penv = reinterpret_cast<void *> (env);
1845
1846   // This thread might already be a Java thread -- this function might
1847   // have been called simply to set the new JNIEnv.
1848   if (_Jv_ThreadCurrent () == NULL)
1849     {
1850       try
1851         {
1852           (void) new gnu::gcj::jni::NativeThread (group, name);
1853         }
1854       catch (jthrowable t)
1855         {
1856           return JNI_ERR;
1857         }
1858     }
1859   _Jv_SetCurrentJNIEnv (env);
1860
1861   return 0;
1862 }
1863
1864 // This is the one actually used by JNI.
1865 static jint
1866 _Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
1867 {
1868   return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args);
1869 }
1870
1871 static jint
1872 _Jv_JNI_DestroyJavaVM (JavaVM *vm)
1873 {
1874   JvAssert (the_vm && vm == the_vm);
1875
1876   JNIEnv *env;
1877   if (_Jv_ThreadCurrent () != NULL)
1878     {
1879       jstring main_name;
1880       // This sucks.
1881       try
1882         {
1883           main_name = JvNewStringLatin1 ("main");
1884         }
1885       catch (jthrowable t)
1886         {
1887           return JNI_ERR;
1888         }
1889
1890       jint r = _Jv_JNI_AttachCurrentThread (vm,
1891                                             main_name,
1892                                             reinterpret_cast<void **> (&env),
1893                                             NULL);
1894       if (r < 0)
1895         return r;
1896     }
1897   else
1898     env = _Jv_GetCurrentJNIEnv ();
1899
1900   _Jv_ThreadWait ();
1901
1902   // Docs say that this always returns an error code.
1903   return JNI_ERR;
1904 }
1905
1906 static jint
1907 _Jv_JNI_DetachCurrentThread (JavaVM *)
1908 {
1909   java::lang::Thread *t = _Jv_ThreadCurrent ();
1910   if (t == NULL)
1911     return JNI_EDETACHED;
1912
1913   // FIXME: we only allow threads attached via AttachCurrentThread to
1914   // be detached.  I have no idea how we could implement detaching
1915   // other threads, given the requirement that we must release all the
1916   // monitors.  That just seems evil.
1917   JvAssert ((&NativeThreadClass)->isInstance (t));
1918
1919   // FIXME: release the monitors.  We'll take this to mean all
1920   // monitors acquired via the JNI interface.  This means we have to
1921   // keep track of them.
1922
1923   gnu::gcj::jni::NativeThread *nt
1924     = reinterpret_cast<gnu::gcj::jni::NativeThread *> (t);
1925   nt->finish ();
1926
1927   return 0;
1928 }
1929
1930 static jint
1931 _Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
1932 {
1933   if (_Jv_ThreadCurrent () == NULL)
1934     {
1935       *penv = NULL;
1936       return JNI_EDETACHED;
1937     }
1938
1939 #ifdef ENABLE_JVMPI
1940   // Handle JVMPI requests.
1941   if (version == JVMPI_VERSION_1)
1942     {
1943       *penv = (void *) &_Jv_JVMPI_Interface;
1944       return 0;
1945     }
1946 #endif
1947
1948   // FIXME: do we really want to support 1.1?
1949   if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_1)
1950     {
1951       *penv = NULL;
1952       return JNI_EVERSION;
1953     }
1954
1955   *penv = (void *) _Jv_GetCurrentJNIEnv ();
1956   return 0;
1957 }
1958
1959 jint
1960 JNI_GetDefaultJavaVMInitArgs (void *args)
1961 {
1962   jint version = * (jint *) args;
1963   // Here we only support 1.2.
1964   if (version != JNI_VERSION_1_2)
1965     return JNI_EVERSION;
1966
1967   JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
1968   ia->version = JNI_VERSION_1_2;
1969   ia->nOptions = 0;
1970   ia->options = NULL;
1971   ia->ignoreUnrecognized = true;
1972
1973   return 0;
1974 }
1975
1976 jint
1977 JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
1978 {
1979   JvAssert (! the_vm);
1980   // FIXME: synchronize
1981   JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
1982   if (nvm == NULL)
1983     return JNI_ERR;
1984   nvm->functions = &_Jv_JNI_InvokeFunctions;
1985
1986   // Parse the arguments.
1987   if (args != NULL)
1988     {
1989       jint version = * (jint *) args;
1990       // We only support 1.2.
1991       if (version != JNI_VERSION_1_2)
1992         return JNI_EVERSION;
1993       JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
1994       for (int i = 0; i < ia->nOptions; ++i)
1995         {
1996           if (! strcmp (ia->options[i].optionString, "vfprintf")
1997               || ! strcmp (ia->options[i].optionString, "exit")
1998               || ! strcmp (ia->options[i].optionString, "abort"))
1999             {
2000               // We are required to recognize these, but for now we
2001               // don't handle them in any way.  FIXME.
2002               continue;
2003             }
2004           else if (! strncmp (ia->options[i].optionString,
2005                               "-verbose", sizeof ("-verbose") - 1))
2006             {
2007               // We don't do anything with this option either.  We
2008               // might want to make sure the argument is valid, but we
2009               // don't really care all that much for now.
2010               continue;
2011             }
2012           else if (! strncmp (ia->options[i].optionString, "-D", 2))
2013             {
2014               // FIXME.
2015               continue;
2016             }
2017           else if (ia->ignoreUnrecognized)
2018             {
2019               if (ia->options[i].optionString[0] == '_'
2020                   || ! strncmp (ia->options[i].optionString, "-X", 2))
2021                 continue;
2022             }
2023
2024           return JNI_ERR;
2025         }
2026     }
2027
2028   jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
2029   if (r < 0)
2030     return r;
2031
2032   the_vm = nvm;
2033   *vm = the_vm;
2034   return 0;
2035 }
2036
2037 jint
2038 JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
2039 {
2040   if (buf_len <= 0)
2041     return JNI_ERR;
2042
2043   // We only support a single VM.
2044   if (the_vm != NULL)
2045     {
2046       vm_buffer[0] = the_vm;
2047       *n_vms = 1;
2048     }
2049   else
2050     *n_vms = 0;
2051   return 0;
2052 }
2053
2054 JavaVM *
2055 _Jv_GetJavaVM ()
2056 {
2057   // FIXME: synchronize
2058   if (! the_vm)
2059     {
2060       JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2061       if (nvm != NULL)
2062         nvm->functions = &_Jv_JNI_InvokeFunctions;
2063       the_vm = nvm;
2064     }
2065
2066   // If this is a Java thread, we want to make sure it has an
2067   // associated JNIEnv.
2068   if (_Jv_ThreadCurrent () != NULL)
2069     {
2070       void *ignore;
2071       _Jv_JNI_AttachCurrentThread (the_vm, &ignore, NULL);
2072     }
2073
2074   return the_vm;
2075 }
2076
2077 static jint
2078 _Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
2079 {
2080   *vm = _Jv_GetJavaVM ();
2081   return *vm == NULL ? JNI_ERR : JNI_OK;
2082 }
2083
2084 \f
2085
2086 #define NOT_IMPL NULL
2087 #define RESERVED NULL
2088
2089 struct JNINativeInterface _Jv_JNIFunctions =
2090 {
2091   RESERVED,
2092   RESERVED,
2093   RESERVED,
2094   RESERVED,
2095   _Jv_JNI_GetVersion,           // GetVersion
2096   _Jv_JNI_DefineClass,          // DefineClass
2097   _Jv_JNI_FindClass,            // FindClass
2098   _Jv_JNI_FromReflectedMethod,  // FromReflectedMethod
2099   _Jv_JNI_FromReflectedField,   // FromReflectedField
2100   _Jv_JNI_ToReflectedMethod,    // ToReflectedMethod
2101   _Jv_JNI_GetSuperclass,        // GetSuperclass
2102   _Jv_JNI_IsAssignableFrom,     // IsAssignableFrom
2103   _Jv_JNI_ToReflectedField,     // ToReflectedField
2104   _Jv_JNI_Throw,                // Throw
2105   _Jv_JNI_ThrowNew,             // ThrowNew
2106   _Jv_JNI_ExceptionOccurred,    // ExceptionOccurred
2107   _Jv_JNI_ExceptionDescribe,    // ExceptionDescribe
2108   _Jv_JNI_ExceptionClear,       // ExceptionClear
2109   _Jv_JNI_FatalError,           // FatalError
2110
2111   _Jv_JNI_PushLocalFrame,       // PushLocalFrame
2112   _Jv_JNI_PopLocalFrame,        // PopLocalFrame
2113   _Jv_JNI_NewGlobalRef,         // NewGlobalRef
2114   _Jv_JNI_DeleteGlobalRef,      // DeleteGlobalRef
2115   _Jv_JNI_DeleteLocalRef,       // DeleteLocalRef
2116
2117   _Jv_JNI_IsSameObject,         // IsSameObject
2118
2119   _Jv_JNI_NewLocalRef,          // NewLocalRef
2120   _Jv_JNI_EnsureLocalCapacity,  // EnsureLocalCapacity
2121
2122   _Jv_JNI_AllocObject,              // AllocObject
2123   _Jv_JNI_NewObject,                // NewObject
2124   _Jv_JNI_NewObjectV,               // NewObjectV
2125   _Jv_JNI_NewObjectA,               // NewObjectA
2126   _Jv_JNI_GetObjectClass,           // GetObjectClass
2127   _Jv_JNI_IsInstanceOf,             // IsInstanceOf
2128   _Jv_JNI_GetAnyMethodID<false>,    // GetMethodID
2129
2130   _Jv_JNI_CallMethod<jobject>,          // CallObjectMethod
2131   _Jv_JNI_CallMethodV<jobject>,         // CallObjectMethodV
2132   _Jv_JNI_CallMethodA<jobject>,         // CallObjectMethodA
2133   _Jv_JNI_CallMethod<jboolean>,         // CallBooleanMethod
2134   _Jv_JNI_CallMethodV<jboolean>,        // CallBooleanMethodV
2135   _Jv_JNI_CallMethodA<jboolean>,        // CallBooleanMethodA
2136   _Jv_JNI_CallMethod<jbyte>,            // CallByteMethod
2137   _Jv_JNI_CallMethodV<jbyte>,           // CallByteMethodV
2138   _Jv_JNI_CallMethodA<jbyte>,           // CallByteMethodA
2139   _Jv_JNI_CallMethod<jchar>,            // CallCharMethod
2140   _Jv_JNI_CallMethodV<jchar>,           // CallCharMethodV
2141   _Jv_JNI_CallMethodA<jchar>,           // CallCharMethodA
2142   _Jv_JNI_CallMethod<jshort>,           // CallShortMethod
2143   _Jv_JNI_CallMethodV<jshort>,          // CallShortMethodV
2144   _Jv_JNI_CallMethodA<jshort>,          // CallShortMethodA
2145   _Jv_JNI_CallMethod<jint>,             // CallIntMethod
2146   _Jv_JNI_CallMethodV<jint>,            // CallIntMethodV
2147   _Jv_JNI_CallMethodA<jint>,            // CallIntMethodA
2148   _Jv_JNI_CallMethod<jlong>,            // CallLongMethod
2149   _Jv_JNI_CallMethodV<jlong>,           // CallLongMethodV
2150   _Jv_JNI_CallMethodA<jlong>,           // CallLongMethodA
2151   _Jv_JNI_CallMethod<jfloat>,           // CallFloatMethod
2152   _Jv_JNI_CallMethodV<jfloat>,          // CallFloatMethodV
2153   _Jv_JNI_CallMethodA<jfloat>,          // CallFloatMethodA
2154   _Jv_JNI_CallMethod<jdouble>,          // CallDoubleMethod
2155   _Jv_JNI_CallMethodV<jdouble>,         // CallDoubleMethodV
2156   _Jv_JNI_CallMethodA<jdouble>,         // CallDoubleMethodA
2157   _Jv_JNI_CallVoidMethod,               // CallVoidMethod
2158   _Jv_JNI_CallVoidMethodV,              // CallVoidMethodV
2159   _Jv_JNI_CallVoidMethodA,              // CallVoidMethodA
2160
2161   // Nonvirtual method invocation functions follow.
2162   _Jv_JNI_CallAnyMethod<jobject, nonvirtual>,   // CallNonvirtualObjectMethod
2163   _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>,  // CallNonvirtualObjectMethodV
2164   _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>,  // CallNonvirtualObjectMethodA
2165   _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>,  // CallNonvirtualBooleanMethod
2166   _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2167   _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2168   _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>,     // CallNonvirtualByteMethod
2169   _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>,    // CallNonvirtualByteMethodV
2170   _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>,    // CallNonvirtualByteMethodA
2171   _Jv_JNI_CallAnyMethod<jchar, nonvirtual>,     // CallNonvirtualCharMethod
2172   _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>,    // CallNonvirtualCharMethodV
2173   _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>,    // CallNonvirtualCharMethodA
2174   _Jv_JNI_CallAnyMethod<jshort, nonvirtual>,    // CallNonvirtualShortMethod
2175   _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>,   // CallNonvirtualShortMethodV
2176   _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>,   // CallNonvirtualShortMethodA
2177   _Jv_JNI_CallAnyMethod<jint, nonvirtual>,      // CallNonvirtualIntMethod
2178   _Jv_JNI_CallAnyMethodV<jint, nonvirtual>,     // CallNonvirtualIntMethodV
2179   _Jv_JNI_CallAnyMethodA<jint, nonvirtual>,     // CallNonvirtualIntMethodA
2180   _Jv_JNI_CallAnyMethod<jlong, nonvirtual>,     // CallNonvirtualLongMethod
2181   _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>,    // CallNonvirtualLongMethodV
2182   _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>,    // CallNonvirtualLongMethodA
2183   _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>,    // CallNonvirtualFloatMethod
2184   _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodV
2185   _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodA
2186   _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>,   // CallNonvirtualDoubleMethod
2187   _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodV
2188   _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodA
2189   _Jv_JNI_CallAnyVoidMethod<nonvirtual>,        // CallNonvirtualVoidMethod
2190   _Jv_JNI_CallAnyVoidMethodV<nonvirtual>,       // CallNonvirtualVoidMethodV
2191   _Jv_JNI_CallAnyVoidMethodA<nonvirtual>,       // CallNonvirtualVoidMethodA
2192
2193   _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2194   _Jv_JNI_GetField<jobject>,    // GetObjectField
2195   _Jv_JNI_GetField<jboolean>,   // GetBooleanField
2196   _Jv_JNI_GetField<jbyte>,      // GetByteField
2197   _Jv_JNI_GetField<jchar>,      // GetCharField
2198   _Jv_JNI_GetField<jshort>,     // GetShortField
2199   _Jv_JNI_GetField<jint>,       // GetIntField
2200   _Jv_JNI_GetField<jlong>,      // GetLongField
2201   _Jv_JNI_GetField<jfloat>,     // GetFloatField
2202   _Jv_JNI_GetField<jdouble>,    // GetDoubleField
2203   _Jv_JNI_SetField,             // SetObjectField
2204   _Jv_JNI_SetField,             // SetBooleanField
2205   _Jv_JNI_SetField,             // SetByteField
2206   _Jv_JNI_SetField,             // SetCharField
2207   _Jv_JNI_SetField,             // SetShortField
2208   _Jv_JNI_SetField,             // SetIntField
2209   _Jv_JNI_SetField,             // SetLongField
2210   _Jv_JNI_SetField,             // SetFloatField
2211   _Jv_JNI_SetField,             // SetDoubleField
2212   _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2213
2214   _Jv_JNI_CallStaticMethod<jobject>,      // CallStaticObjectMethod
2215   _Jv_JNI_CallStaticMethodV<jobject>,     // CallStaticObjectMethodV
2216   _Jv_JNI_CallStaticMethodA<jobject>,     // CallStaticObjectMethodA
2217   _Jv_JNI_CallStaticMethod<jboolean>,     // CallStaticBooleanMethod
2218   _Jv_JNI_CallStaticMethodV<jboolean>,    // CallStaticBooleanMethodV
2219   _Jv_JNI_CallStaticMethodA<jboolean>,    // CallStaticBooleanMethodA
2220   _Jv_JNI_CallStaticMethod<jbyte>,        // CallStaticByteMethod
2221   _Jv_JNI_CallStaticMethodV<jbyte>,       // CallStaticByteMethodV
2222   _Jv_JNI_CallStaticMethodA<jbyte>,       // CallStaticByteMethodA
2223   _Jv_JNI_CallStaticMethod<jchar>,        // CallStaticCharMethod
2224   _Jv_JNI_CallStaticMethodV<jchar>,       // CallStaticCharMethodV
2225   _Jv_JNI_CallStaticMethodA<jchar>,       // CallStaticCharMethodA
2226   _Jv_JNI_CallStaticMethod<jshort>,       // CallStaticShortMethod
2227   _Jv_JNI_CallStaticMethodV<jshort>,      // CallStaticShortMethodV
2228   _Jv_JNI_CallStaticMethodA<jshort>,      // CallStaticShortMethodA
2229   _Jv_JNI_CallStaticMethod<jint>,         // CallStaticIntMethod
2230   _Jv_JNI_CallStaticMethodV<jint>,        // CallStaticIntMethodV
2231   _Jv_JNI_CallStaticMethodA<jint>,        // CallStaticIntMethodA
2232   _Jv_JNI_CallStaticMethod<jlong>,        // CallStaticLongMethod
2233   _Jv_JNI_CallStaticMethodV<jlong>,       // CallStaticLongMethodV
2234   _Jv_JNI_CallStaticMethodA<jlong>,       // CallStaticLongMethodA
2235   _Jv_JNI_CallStaticMethod<jfloat>,       // CallStaticFloatMethod
2236   _Jv_JNI_CallStaticMethodV<jfloat>,      // CallStaticFloatMethodV
2237   _Jv_JNI_CallStaticMethodA<jfloat>,      // CallStaticFloatMethodA
2238   _Jv_JNI_CallStaticMethod<jdouble>,      // CallStaticDoubleMethod
2239   _Jv_JNI_CallStaticMethodV<jdouble>,     // CallStaticDoubleMethodV
2240   _Jv_JNI_CallStaticMethodA<jdouble>,     // CallStaticDoubleMethodA
2241   _Jv_JNI_CallStaticVoidMethod,           // CallStaticVoidMethod
2242   _Jv_JNI_CallStaticVoidMethodV,          // CallStaticVoidMethodV
2243   _Jv_JNI_CallStaticVoidMethodA,          // CallStaticVoidMethodA
2244
2245   _Jv_JNI_GetAnyFieldID<true>,         // GetStaticFieldID
2246   _Jv_JNI_GetStaticField<jobject>,     // GetStaticObjectField
2247   _Jv_JNI_GetStaticField<jboolean>,    // GetStaticBooleanField
2248   _Jv_JNI_GetStaticField<jbyte>,       // GetStaticByteField
2249   _Jv_JNI_GetStaticField<jchar>,       // GetStaticCharField
2250   _Jv_JNI_GetStaticField<jshort>,      // GetStaticShortField
2251   _Jv_JNI_GetStaticField<jint>,        // GetStaticIntField
2252   _Jv_JNI_GetStaticField<jlong>,       // GetStaticLongField
2253   _Jv_JNI_GetStaticField<jfloat>,      // GetStaticFloatField
2254   _Jv_JNI_GetStaticField<jdouble>,     // GetStaticDoubleField
2255   _Jv_JNI_SetStaticField,              // SetStaticObjectField
2256   _Jv_JNI_SetStaticField,              // SetStaticBooleanField
2257   _Jv_JNI_SetStaticField,              // SetStaticByteField
2258   _Jv_JNI_SetStaticField,              // SetStaticCharField
2259   _Jv_JNI_SetStaticField,              // SetStaticShortField
2260   _Jv_JNI_SetStaticField,              // SetStaticIntField
2261   _Jv_JNI_SetStaticField,              // SetStaticLongField
2262   _Jv_JNI_SetStaticField,              // SetStaticFloatField
2263   _Jv_JNI_SetStaticField,              // SetStaticDoubleField
2264   _Jv_JNI_NewString,                   // NewString
2265   _Jv_JNI_GetStringLength,             // GetStringLength
2266   _Jv_JNI_GetStringChars,              // GetStringChars
2267   _Jv_JNI_ReleaseStringChars,          // ReleaseStringChars
2268   _Jv_JNI_NewStringUTF,                // NewStringUTF
2269   _Jv_JNI_GetStringUTFLength,          // GetStringUTFLength
2270   _Jv_JNI_GetStringUTFChars,           // GetStringUTFLength
2271   _Jv_JNI_ReleaseStringUTFChars,       // ReleaseStringUTFChars
2272   _Jv_JNI_GetArrayLength,              // GetArrayLength
2273   _Jv_JNI_NewObjectArray,              // NewObjectArray
2274   _Jv_JNI_GetObjectArrayElement,       // GetObjectArrayElement
2275   _Jv_JNI_SetObjectArrayElement,       // SetObjectArrayElement
2276   _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2277                                                             // NewBooleanArray
2278   _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>,     // NewByteArray
2279   _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>,     // NewCharArray
2280   _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>,   // NewShortArray
2281   _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>,       // NewIntArray
2282   _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>,     // NewLongArray
2283   _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>,   // NewFloatArray
2284   _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2285   _Jv_JNI_GetPrimitiveArrayElements,        // GetBooleanArrayElements
2286   _Jv_JNI_GetPrimitiveArrayElements,        // GetByteArrayElements
2287   _Jv_JNI_GetPrimitiveArrayElements,        // GetCharArrayElements
2288   _Jv_JNI_GetPrimitiveArrayElements,        // GetShortArrayElements
2289   _Jv_JNI_GetPrimitiveArrayElements,        // GetIntArrayElements
2290   _Jv_JNI_GetPrimitiveArrayElements,        // GetLongArrayElements
2291   _Jv_JNI_GetPrimitiveArrayElements,        // GetFloatArrayElements
2292   _Jv_JNI_GetPrimitiveArrayElements,        // GetDoubleArrayElements
2293   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseBooleanArrayElements
2294   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseByteArrayElements
2295   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseCharArrayElements
2296   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseShortArrayElements
2297   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseIntArrayElements
2298   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseLongArrayElements
2299   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseFloatArrayElements
2300   _Jv_JNI_ReleasePrimitiveArrayElements,    // ReleaseDoubleArrayElements
2301   _Jv_JNI_GetPrimitiveArrayRegion,          // GetBooleanArrayRegion
2302   _Jv_JNI_GetPrimitiveArrayRegion,          // GetByteArrayRegion
2303   _Jv_JNI_GetPrimitiveArrayRegion,          // GetCharArrayRegion
2304   _Jv_JNI_GetPrimitiveArrayRegion,          // GetShortArrayRegion
2305   _Jv_JNI_GetPrimitiveArrayRegion,          // GetIntArrayRegion
2306   _Jv_JNI_GetPrimitiveArrayRegion,          // GetLongArrayRegion
2307   _Jv_JNI_GetPrimitiveArrayRegion,          // GetFloatArrayRegion
2308   _Jv_JNI_GetPrimitiveArrayRegion,          // GetDoubleArrayRegion
2309   _Jv_JNI_SetPrimitiveArrayRegion,          // SetBooleanArrayRegion
2310   _Jv_JNI_SetPrimitiveArrayRegion,          // SetByteArrayRegion
2311   _Jv_JNI_SetPrimitiveArrayRegion,          // SetCharArrayRegion
2312   _Jv_JNI_SetPrimitiveArrayRegion,          // SetShortArrayRegion
2313   _Jv_JNI_SetPrimitiveArrayRegion,          // SetIntArrayRegion
2314   _Jv_JNI_SetPrimitiveArrayRegion,          // SetLongArrayRegion
2315   _Jv_JNI_SetPrimitiveArrayRegion,          // SetFloatArrayRegion
2316   _Jv_JNI_SetPrimitiveArrayRegion,          // SetDoubleArrayRegion
2317   _Jv_JNI_RegisterNatives,                  // RegisterNatives
2318   _Jv_JNI_UnregisterNatives,                // UnregisterNatives
2319   _Jv_JNI_MonitorEnter,                     // MonitorEnter
2320   _Jv_JNI_MonitorExit,                      // MonitorExit
2321   _Jv_JNI_GetJavaVM,                        // GetJavaVM
2322
2323   _Jv_JNI_GetStringRegion,                  // GetStringRegion
2324   _Jv_JNI_GetStringUTFRegion,               // GetStringUTFRegion
2325   _Jv_JNI_GetPrimitiveArrayCritical,        // GetPrimitiveArrayCritical
2326   _Jv_JNI_ReleasePrimitiveArrayCritical,    // ReleasePrimitiveArrayCritical
2327   _Jv_JNI_GetStringCritical,                // GetStringCritical
2328   _Jv_JNI_ReleaseStringCritical,            // ReleaseStringCritical
2329
2330   NOT_IMPL /* newweakglobalref */,
2331   NOT_IMPL /* deleteweakglobalref */,
2332
2333   _Jv_JNI_ExceptionCheck
2334 };
2335
2336 struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
2337 {
2338   RESERVED,
2339   RESERVED,
2340   RESERVED,
2341
2342   _Jv_JNI_DestroyJavaVM,
2343   _Jv_JNI_AttachCurrentThread,
2344   _Jv_JNI_DetachCurrentThread,
2345   _Jv_JNI_GetEnv
2346 };