libjava/jni.cc

   1 // jni.cc - JNI implementation, including the jump table.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
   4    Free Software Foundation
   5
   6    This file is part of libgcj.
   7
   8 This software is copyrighted work licensed under the terms of the
   9 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
  10 details.  */
  11
  12 #include <config.h>
  13
  14 #include <stdio.h>
  15 #include <stddef.h>
  16 #include <string.h>
  17
  18 #include <gcj/cni.h>
  19 #include <jvm.h>
  20 #include <java-assert.h>
  21 #include <jni.h>
  22 #ifdef ENABLE_JVMPI
  23 #include <jvmpi.h>
  24 #endif
  25
  26 #include <java/lang/Class.h>
  27 #include <java/lang/ClassLoader.h>
  28 #include <java/lang/Throwable.h>
  29 #include <java/lang/ArrayIndexOutOfBoundsException.h>
  30 #include <java/lang/StringIndexOutOfBoundsException.h>
  31 #include <java/lang/StringBuffer.h>
  32 #include <java/lang/UnsatisfiedLinkError.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/lang/Integer.h>
  41 #include <java/lang/ThreadGroup.h>
  42 #include <java/lang/Thread.h>
  43 #include <java/lang/IllegalAccessError.h>
  44 #include <java/nio/DirectByteBufferImpl.h>
  45 #include <java/nio/DirectByteBufferImpl$ReadWrite.h>
  46 #include <java/util/IdentityHashMap.h>
  47 #include <gnu/gcj/RawData.h>
  48
  49 #include <gcj/method.h>
  50 #include <gcj/field.h>
  51
  52 #include <java-interp.h>
  53 #include <java-threads.h>
  54
  55 using namespace gcj;
  56
  57 // This enum is used to select different template instantiations in
  58 // the invocation code.
  59 enum invocation_type
  60 {
  61   normal,
  62   nonvirtual,
  63   static_type,
  64   constructor
  65 };
  66
  67 // Forward declarations.
  68 extern struct JNINativeInterface _Jv_JNIFunctions;
  69 extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
  70
  71 // Number of slots in the default frame.  The VM must allow at least
  72 // 16.
  73 #define FRAME_SIZE 32
  74
  75 // Mark value indicating this is an overflow frame.
  76 #define MARK_NONE    0
  77 // Mark value indicating this is a user frame.
  78 #define MARK_USER    1
  79 // Mark value indicating this is a system frame.
  80 #define MARK_SYSTEM  2
  81
  82 // This structure is used to keep track of local references.
  83 struct _Jv_JNI_LocalFrame
  84 {
  85   // This is true if this frame object represents a pushed frame (eg
  86   // from PushLocalFrame).
  87   int marker :  2;
  88
  89   // Number of elements in frame.
  90   int size   : 30;
  91
  92   // Next frame in chain.
  93   _Jv_JNI_LocalFrame *next;
  94
  95   // The elements.  These are allocated using the C "struct hack".
  96   jobject vec[0];
  97 };
  98
  99 // This holds a reference count for all local references.
 100 static java::util::IdentityHashMap *local_ref_table;
 101 // This holds a reference count for all global references.
 102 static java::util::IdentityHashMap *global_ref_table;
 103
 104 // The only VM.
 105 static JavaVM *the_vm;
 106
 107 #ifdef ENABLE_JVMPI
 108 // The only JVMPI interface description.
 109 static JVMPI_Interface _Jv_JVMPI_Interface;
 110
 111 static jint
 112 jvmpiEnableEvent (jint event_type, void *)
 113 {
 114   switch (event_type)
 115     {
 116     case JVMPI_EVENT_OBJECT_ALLOC:
 117       _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
 118       break;
 119
 120     case JVMPI_EVENT_THREAD_START:
 121       _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
 122       break;
 123
 124     case JVMPI_EVENT_THREAD_END:
 125       _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
 126       break;
 127
 128     default:
 129       return JVMPI_NOT_AVAILABLE;
 130     }
 131
 132   return JVMPI_SUCCESS;
 133 }
 134
 135 static jint
 136 jvmpiDisableEvent (jint event_type, void *)
 137 {
 138   switch (event_type)
 139     {
 140     case JVMPI_EVENT_OBJECT_ALLOC:
 141       _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
 142       break;
 143
 144     default:
 145       return JVMPI_NOT_AVAILABLE;
 146     }
 147
 148   return JVMPI_SUCCESS;
 149 }
 150 #endif
 151
 152 \f
 153
 154 void
 155 _Jv_JNI_Init (void)
 156 {
 157   local_ref_table = new java::util::IdentityHashMap;
 158   global_ref_table = new java::util::IdentityHashMap;
 159
 160 #ifdef ENABLE_JVMPI
 161   _Jv_JVMPI_Interface.version = 1;
 162   _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
 163   _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
 164   _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
 165   _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
 166   _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
 167 #endif
 168 }
 169
 170 // Tell the GC that a certain pointer is live.
 171 static void
 172 mark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
 173 {
 174   JvSynchronize sync (ref_table);
 175
 176   using namespace java::lang;
 177   Integer *refcount = (Integer *) ref_table->get (obj);
 178   jint val = (refcount == NULL) ? 0 : refcount->intValue ();
 179   // FIXME: what about out of memory error?
 180   ref_table->put (obj, new Integer (val + 1));
 181 }
 182
 183 // Unmark a pointer.
 184 static void
 185 unmark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
 186 {
 187   JvSynchronize sync (ref_table);
 188
 189   using namespace java::lang;
 190   Integer *refcount = (Integer *) ref_table->get (obj);
 191   JvAssert (refcount);
 192   jint val = refcount->intValue () - 1;
 193   JvAssert (val >= 0);
 194   if (val == 0)
 195     ref_table->remove (obj);
 196   else
 197     // FIXME: what about out of memory error?
 198     ref_table->put (obj, new Integer (val));
 199 }
 200
 201 // "Unwrap" some random non-reference type.  This exists to simplify
 202 // other template functions.
 203 template<typename T>
 204 static T
 205 unwrap (T val)
 206 {
 207   return val;
 208 }
 209
 210 // Unwrap a weak reference, if required.
 211 template<typename T>
 212 static T *
 213 unwrap (T *obj)
 214 {
 215   using namespace gnu::gcj::runtime;
 216   // We can compare the class directly because JNIWeakRef is `final'.
 217   // Doing it this way is much faster.
 218   if (obj == NULL || obj->getClass () != &JNIWeakRef::class$)
 219     return obj;
 220   JNIWeakRef *wr = reinterpret_cast<JNIWeakRef *> (obj);
 221   return reinterpret_cast<T *> (wr->get ());
 222 }
 223
 224 \f
 225
 226 static jobject JNICALL
 227 _Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
 228 {
 229   // This seems weird but I think it is correct.
 230   obj = unwrap (obj);
 231   mark_for_gc (obj, global_ref_table);
 232   return obj;
 233 }
 234
 235 static void JNICALL
 236 _Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
 237 {
 238   // This seems weird but I think it is correct.
 239   obj = unwrap (obj);
 240   unmark_for_gc (obj, global_ref_table);
 241 }
 242
 243 static void JNICALL
 244 _Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
 245 {
 246   _Jv_JNI_LocalFrame *frame;
 247
 248   // This seems weird but I think it is correct.
 249   obj = unwrap (obj);
 250
 251   for (frame = env->locals; frame != NULL; frame = frame->next)
 252     {
 253       for (int i = 0; i < frame->size; ++i)
 254         {
 255           if (frame->vec[i] == obj)
 256             {
 257               frame->vec[i] = NULL;
 258               unmark_for_gc (obj, local_ref_table);
 259               return;
 260             }
 261         }
 262
 263       // Don't go past a marked frame.
 264       JvAssert (frame->marker == MARK_NONE);
 265     }
 266
 267   JvAssert (0);
 268 }
 269
 270 static jint JNICALL
 271 _Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
 272 {
 273   // It is easier to just always allocate a new frame of the requested
 274   // size.  This isn't the most efficient thing, but for now we don't
 275   // care.  Note that _Jv_JNI_PushLocalFrame relies on this right now.
 276
 277   _Jv_JNI_LocalFrame *frame;
 278   try
 279     {
 280       frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
 281                                                  + size * sizeof (jobject));
 282     }
 283   catch (jthrowable t)
 284     {
 285       env->ex = t;
 286       return JNI_ERR;
 287     }
 288
 289   frame->marker = MARK_NONE;
 290   frame->size = size;
 291   memset (&frame->vec[0], 0, size * sizeof (jobject));
 292   frame->next = env->locals;
 293   env->locals = frame;
 294
 295   return 0;
 296 }
 297
 298 static jint JNICALL
 299 _Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
 300 {
 301   jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
 302   if (r < 0)
 303     return r;
 304
 305   // The new frame is on top.
 306   env->locals->marker = MARK_USER;
 307
 308   return 0;
 309 }
 310
 311 static jobject JNICALL
 312 _Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
 313 {
 314   // This seems weird but I think it is correct.
 315   obj = unwrap (obj);
 316
 317   // Try to find an open slot somewhere in the topmost frame.
 318   _Jv_JNI_LocalFrame *frame = env->locals;
 319   bool done = false, set = false;
 320   for (; frame != NULL && ! done; frame = frame->next)
 321     {
 322       for (int i = 0; i < frame->size; ++i)
 323         {
 324           if (frame->vec[i] == NULL)
 325             {
 326               set = true;
 327               done = true;
 328               frame->vec[i] = obj;
 329               break;
 330             }
 331         }
 332
 333       // If we found a slot, or if the frame we just searched is the
 334       // mark frame, then we are done.
 335       if (done || frame == NULL || frame->marker != MARK_NONE)
 336         break;
 337     }
 338
 339   if (! set)
 340     {
 341       // No slots, so we allocate a new frame.  According to the spec
 342       // we could just die here.  FIXME: return value.
 343       _Jv_JNI_EnsureLocalCapacity (env, 16);
 344       // We know the first element of the new frame will be ok.
 345       env->locals->vec[0] = obj;
 346     }
 347
 348   mark_for_gc (obj, local_ref_table);
 349   return obj;
 350 }
 351
 352 static jobject JNICALL
 353 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result, int stop)
 354 {
 355   _Jv_JNI_LocalFrame *rf = env->locals;
 356
 357   bool done = false;
 358   while (rf != NULL && ! done)
 359     {
 360       for (int i = 0; i < rf->size; ++i)
 361         if (rf->vec[i] != NULL)
 362           unmark_for_gc (rf->vec[i], local_ref_table);
 363
 364       // If the frame we just freed is the marker frame, we are done.
 365       done = (rf->marker == stop);
 366
 367       _Jv_JNI_LocalFrame *n = rf->next;
 368       // When N==NULL, we've reached the stack-allocated frame, and we
 369       // must not free it.  However, we must be sure to clear all its
 370       // elements, since we might conceivably reuse it.
 371       if (n == NULL)
 372         {
 373           memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
 374           break;
 375         }
 376
 377       _Jv_Free (rf);
 378       rf = n;
 379     }
 380
 381   // Update the local frame information.
 382   env->locals = rf;
 383
 384   return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
 385 }
 386
 387 static jobject JNICALL
 388 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
 389 {
 390   return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
 391 }
 392
 393 // Make sure an array's type is compatible with the type of the
 394 // destination.
 395 template<typename T>
 396 static bool
 397 _Jv_JNI_check_types (JNIEnv *env, JArray<T> *array, jclass K)
 398 {
 399   jclass klass = array->getClass()->getComponentType();
 400   if (__builtin_expect (klass != K, false))
 401     {
 402       env->ex = new java::lang::IllegalAccessError ();
 403       return false;
 404     }
 405   else
 406     return true;
 407 }
 408
 409 // Pop a `system' frame from the stack.  This is `extern "C"' as it is
 410 // used by the compiler.
 411 extern "C" void
 412 _Jv_JNI_PopSystemFrame (JNIEnv *env)
 413 {
 414   _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
 415
 416   if (env->ex)
 417     {
 418       jthrowable t = env->ex;
 419       env->ex = NULL;
 420       throw t;
 421     }
 422 }
 423
 424 template<typename T> T extract_from_jvalue(jvalue const & t);
 425 template<> jboolean extract_from_jvalue(jvalue const & jv) { return jv.z; }
 426 template<> jbyte    extract_from_jvalue(jvalue const & jv) { return jv.b; }
 427 template<> jchar    extract_from_jvalue(jvalue const & jv) { return jv.c; }
 428 template<> jshort   extract_from_jvalue(jvalue const & jv) { return jv.s; }
 429 template<> jint     extract_from_jvalue(jvalue const & jv) { return jv.i; }
 430 template<> jlong    extract_from_jvalue(jvalue const & jv) { return jv.j; }
 431 template<> jfloat   extract_from_jvalue(jvalue const & jv) { return jv.f; }
 432 template<> jdouble  extract_from_jvalue(jvalue const & jv) { return jv.d; }
 433 template<> jobject  extract_from_jvalue(jvalue const & jv) { return jv.l; }
 434
 435
 436 // This function is used from other template functions.  It wraps the
 437 // return value appropriately; we specialize it so that object returns
 438 // are turned into local references.
 439 template<typename T>
 440 static T
 441 wrap_value (JNIEnv *, T value)
 442 {
 443   return value;
 444 }
 445
 446 // This specialization is used for jobject, jclass, jstring, jarray,
 447 // etc.
 448 template<typename R, typename T>
 449 static T *
 450 wrap_value (JNIEnv *env, T *value)
 451 {
 452   return (value == NULL
 453           ? value
 454           : (T *) _Jv_JNI_NewLocalRef (env, (jobject) value));
 455 }
 456
 457 \f
 458
 459 static jint JNICALL
 460 _Jv_JNI_GetVersion (JNIEnv *)
 461 {
 462   return JNI_VERSION_1_4;
 463 }
 464
 465 static jclass JNICALL
 466 _Jv_JNI_DefineClass (JNIEnv *env, const char *name, jobject loader,
 467                      const jbyte *buf, jsize bufLen)
 468 {
 469   try
 470     {
 471       loader = unwrap (loader);
 472
 473       jstring sname = JvNewStringUTF (name);
 474       jbyteArray bytes = JvNewByteArray (bufLen);
 475
 476       jbyte *elts = elements (bytes);
 477       memcpy (elts, buf, bufLen * sizeof (jbyte));
 478
 479       java::lang::ClassLoader *l
 480         = reinterpret_cast<java::lang::ClassLoader *> (loader);
 481
 482       jclass result = l->defineClass (sname, bytes, 0, bufLen);
 483       return (jclass) wrap_value (env, result);
 484     }
 485   catch (jthrowable t)
 486     {
 487       env->ex = t;
 488       return NULL;
 489     }
 490 }
 491
 492 static jclass JNICALL
 493 _Jv_JNI_FindClass (JNIEnv *env, const char *name)
 494 {
 495   // FIXME: assume that NAME isn't too long.
 496   int len = strlen (name);
 497   char s[len + 1];
 498   for (int i = 0; i <= len; ++i)
 499     s[i] = (name[i] == '/') ? '.' : name[i];
 500
 501   jclass r = NULL;
 502   try
 503     {
 504       // This might throw an out of memory exception.
 505       jstring n = JvNewStringUTF (s);
 506
 507       java::lang::ClassLoader *loader = NULL;
 508       if (env->klass != NULL)
 509         loader = env->klass->getClassLoaderInternal ();
 510
 511       if (loader == NULL)
 512         {
 513           // FIXME: should use getBaseClassLoader, but we don't have that
 514           // yet.
 515           loader = java::lang::ClassLoader::getSystemClassLoader ();
 516         }
 517
 518       r = loader->loadClass (n);
 519     }
 520   catch (jthrowable t)
 521     {
 522       env->ex = t;
 523     }
 524
 525   return (jclass) wrap_value (env, r);
 526 }
 527
 528 static jclass JNICALL
 529 _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
 530 {
 531   return (jclass) wrap_value (env, unwrap (clazz)->getSuperclass ());
 532 }
 533
 534 static jboolean JNICALL
 535 _Jv_JNI_IsAssignableFrom (JNIEnv *, jclass clazz1, jclass clazz2)
 536 {
 537   return unwrap (clazz1)->isAssignableFrom (unwrap (clazz2));
 538 }
 539
 540 static jint JNICALL
 541 _Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
 542 {
 543   // We check in case the user did some funky cast.
 544   obj = unwrap (obj);
 545   JvAssert (obj != NULL && java::lang::Throwable::class$.isInstance (obj));
 546   env->ex = obj;
 547   return 0;
 548 }
 549
 550 static jint JNICALL
 551 _Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
 552 {
 553   using namespace java::lang::reflect;
 554
 555   clazz = unwrap (clazz);
 556   JvAssert (java::lang::Throwable::class$.isAssignableFrom (clazz));
 557
 558   int r = JNI_OK;
 559   try
 560     {
 561       JArray<jclass> *argtypes
 562         = (JArray<jclass> *) JvNewObjectArray (1, &java::lang::Class::class$,
 563                                                NULL);
 564
 565       jclass *elts = elements (argtypes);
 566       elts[0] = &java::lang::String::class$;
 567
 568       Constructor *cons = clazz->getConstructor (argtypes);
 569
 570       jobjectArray values = JvNewObjectArray (1, &java::lang::String::class$,
 571                                               NULL);
 572       jobject *velts = elements (values);
 573       velts[0] = JvNewStringUTF (message);
 574
 575       jobject obj = cons->newInstance (values);
 576
 577       env->ex = reinterpret_cast<jthrowable> (obj);
 578     }
 579   catch (jthrowable t)
 580     {
 581       env->ex = t;
 582       r = JNI_ERR;
 583     }
 584
 585   return r;
 586 }
 587
 588 static jthrowable JNICALL
 589 _Jv_JNI_ExceptionOccurred (JNIEnv *env)
 590 {
 591   return (jthrowable) wrap_value (env, env->ex);
 592 }
 593
 594 static void JNICALL
 595 _Jv_JNI_ExceptionDescribe (JNIEnv *env)
 596 {
 597   if (env->ex != NULL)
 598     env->ex->printStackTrace();
 599 }
 600
 601 static void JNICALL
 602 _Jv_JNI_ExceptionClear (JNIEnv *env)
 603 {
 604   env->ex = NULL;
 605 }
 606
 607 static jboolean JNICALL
 608 _Jv_JNI_ExceptionCheck (JNIEnv *env)
 609 {
 610   return env->ex != NULL;
 611 }
 612
 613 static void JNICALL
 614 _Jv_JNI_FatalError (JNIEnv *, const char *message)
 615 {
 616   JvFail (message);
 617 }
 618
 619 \f
 620
 621 static jboolean JNICALL
 622 _Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
 623 {
 624   return unwrap (obj1) == unwrap (obj2);
 625 }
 626
 627 static jobject JNICALL
 628 _Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
 629 {
 630   jobject obj = NULL;
 631   using namespace java::lang::reflect;
 632
 633   try
 634     {
 635       clazz = unwrap (clazz);
 636       JvAssert (clazz && ! clazz->isArray ());
 637       if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
 638         env->ex = new java::lang::InstantiationException ();
 639       else
 640         obj = _Jv_AllocObject (clazz);
 641     }
 642   catch (jthrowable t)
 643     {
 644       env->ex = t;
 645     }
 646
 647   return wrap_value (env, obj);
 648 }
 649
 650 static jclass JNICALL
 651 _Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
 652 {
 653   obj = unwrap (obj);
 654   JvAssert (obj);
 655   return (jclass) wrap_value (env, obj->getClass());
 656 }
 657
 658 static jboolean JNICALL
 659 _Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
 660 {
 661   return unwrap (clazz)->isInstance(unwrap (obj));
 662 }
 663
 664 \f
 665
 666 //
 667 // This section concerns method invocation.
 668 //
 669
 670 template<jboolean is_static>
 671 static jmethodID JNICALL
 672 _Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
 673                         const char *name, const char *sig)
 674 {
 675   try
 676     {
 677       clazz = unwrap (clazz);
 678       _Jv_InitClass (clazz);
 679
 680       _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
 681
 682       // FIXME: assume that SIG isn't too long.
 683       int len = strlen (sig);
 684       char s[len + 1];
 685       for (int i = 0; i <= len; ++i)
 686         s[i] = (sig[i] == '/') ? '.' : sig[i];
 687       _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
 688
 689       JvAssert (! clazz->isPrimitive());
 690
 691       using namespace java::lang::reflect;
 692
 693       while (clazz != NULL)
 694         {
 695           jint count = JvNumMethods (clazz);
 696           jmethodID meth = JvGetFirstMethod (clazz);
 697
 698           for (jint i = 0; i < count; ++i)
 699             {
 700               if (((is_static && Modifier::isStatic (meth->accflags))
 701                    || (! is_static && ! Modifier::isStatic (meth->accflags)))
 702                   && _Jv_equalUtf8Consts (meth->name, name_u)
 703                   && _Jv_equalUtf8Consts (meth->signature, sig_u))
 704                 return meth;
 705
 706               meth = meth->getNextMethod();
 707             }
 708
 709           clazz = clazz->getSuperclass ();
 710         }
 711
 712       java::lang::StringBuffer *name_sig =
 713         new java::lang::StringBuffer (JvNewStringUTF (name));
 714       name_sig->append ((jchar) ' ')->append (JvNewStringUTF (s));
 715       env->ex = new java::lang::NoSuchMethodError (name_sig->toString ());
 716     }
 717   catch (jthrowable t)
 718     {
 719       env->ex = t;
 720     }
 721
 722   return NULL;
 723 }
 724
 725 // This is a helper function which turns a va_list into an array of
 726 // `jvalue's.  It needs signature information in order to do its work.
 727 // The array of values must already be allocated.
 728 static void
 729 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
 730 {
 731   jclass *arg_elts = elements (arg_types);
 732   for (int i = 0; i < arg_types->length; ++i)
 733     {
 734       // Here we assume that sizeof(int) >= sizeof(jint), because we
 735       // use `int' when decoding the varargs.  Likewise for
 736       // float, and double.  Also we assume that sizeof(jlong) >=
 737       // sizeof(int), i.e. that jlong values are not further
 738       // promoted.
 739       JvAssert (sizeof (int) >= sizeof (jint));
 740       JvAssert (sizeof (jlong) >= sizeof (int));
 741       JvAssert (sizeof (double) >= sizeof (jfloat));
 742       JvAssert (sizeof (double) >= sizeof (jdouble));
 743       if (arg_elts[i] == JvPrimClass (byte))
 744         values[i].b = (jbyte) va_arg (vargs, int);
 745       else if (arg_elts[i] == JvPrimClass (short))
 746         values[i].s = (jshort) va_arg (vargs, int);
 747       else if (arg_elts[i] == JvPrimClass (int))
 748         values[i].i = (jint) va_arg (vargs, int);
 749       else if (arg_elts[i] == JvPrimClass (long))
 750         values[i].j = (jlong) va_arg (vargs, jlong);
 751       else if (arg_elts[i] == JvPrimClass (float))
 752         values[i].f = (jfloat) va_arg (vargs, double);
 753       else if (arg_elts[i] == JvPrimClass (double))
 754         values[i].d = (jdouble) va_arg (vargs, double);
 755       else if (arg_elts[i] == JvPrimClass (boolean))
 756         values[i].z = (jboolean) va_arg (vargs, int);
 757       else if (arg_elts[i] == JvPrimClass (char))
 758         values[i].c = (jchar) va_arg (vargs, int);
 759       else
 760         {
 761           // An object.
 762           values[i].l = unwrap (va_arg (vargs, jobject));
 763         }
 764     }
 765 }
 766
 767 // This can call any sort of method: virtual, "nonvirtual", static, or
 768 // constructor.
 769 template<typename T, invocation_type style>
 770 static T JNICALL
 771 _Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
 772                         jmethodID id, va_list vargs)
 773 {
 774   obj = unwrap (obj);
 775   klass = unwrap (klass);
 776
 777   jclass decl_class = klass ? klass : obj->getClass ();
 778   JvAssert (decl_class != NULL);
 779
 780   jclass return_type;
 781   JArray<jclass> *arg_types;
 782
 783   try
 784     {
 785       _Jv_GetTypesFromSignature (id, decl_class,
 786                                  &arg_types, &return_type);
 787
 788       jvalue args[arg_types->length];
 789       array_from_valist (args, arg_types, vargs);
 790
 791       // For constructors we need to pass the Class we are instantiating.
 792       if (style == constructor)
 793         return_type = klass;
 794
 795       jvalue result;
 796       _Jv_CallAnyMethodA (obj, return_type, id,
 797                           style == constructor,
 798                           style == normal,
 799                           arg_types, args, &result);
 800
 801       return wrap_value (env, extract_from_jvalue<T>(result));
 802     }
 803   catch (jthrowable t)
 804     {
 805       env->ex = t;
 806     }
 807
 808   return wrap_value (env, (T) 0);
 809 }
 810
 811 template<typename T, invocation_type style>
 812 static T JNICALL
 813 _Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
 814                        jmethodID method, ...)
 815 {
 816   va_list args;
 817   T result;
 818
 819   va_start (args, method);
 820   result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
 821   va_end (args);
 822
 823   return result;
 824 }
 825
 826 template<typename T, invocation_type style>
 827 static T JNICALL
 828 _Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
 829                         jmethodID id, jvalue *args)
 830 {
 831   obj = unwrap (obj);
 832   klass = unwrap (klass);
 833
 834   jclass decl_class = klass ? klass : obj->getClass ();
 835   JvAssert (decl_class != NULL);
 836
 837   jclass return_type;
 838   JArray<jclass> *arg_types;
 839   try
 840     {
 841       _Jv_GetTypesFromSignature (id, decl_class,
 842                                  &arg_types, &return_type);
 843
 844       // For constructors we need to pass the Class we are instantiating.
 845       if (style == constructor)
 846         return_type = klass;
 847
 848       // Unwrap arguments as required.  Eww.
 849       jclass *type_elts = elements (arg_types);
 850       jvalue arg_copy[arg_types->length];
 851       for (int i = 0; i < arg_types->length; ++i)
 852         {
 853           if (type_elts[i]->isPrimitive ())
 854             arg_copy[i] = args[i];
 855           else
 856             arg_copy[i].l = unwrap (args[i].l);
 857         }
 858
 859       jvalue result;
 860       _Jv_CallAnyMethodA (obj, return_type, id,
 861                           style == constructor,
 862                           style == normal,
 863                           arg_types, arg_copy, &result);
 864
 865       return wrap_value (env, extract_from_jvalue<T>(result));
 866     }
 867   catch (jthrowable t)
 868     {
 869       env->ex = t;
 870     }
 871
 872   return wrap_value (env, (T) 0);
 873 }
 874
 875 template<invocation_type style>
 876 static void JNICALL
 877 _Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
 878                             jmethodID id, va_list vargs)
 879 {
 880   obj = unwrap (obj);
 881   klass = unwrap (klass);
 882
 883   jclass decl_class = klass ? klass : obj->getClass ();
 884   JvAssert (decl_class != NULL);
 885
 886   jclass return_type;
 887   JArray<jclass> *arg_types;
 888   try
 889     {
 890       _Jv_GetTypesFromSignature (id, decl_class,
 891                                  &arg_types, &return_type);
 892
 893       jvalue args[arg_types->length];
 894       array_from_valist (args, arg_types, vargs);
 895
 896       // For constructors we need to pass the Class we are instantiating.
 897       if (style == constructor)
 898         return_type = klass;
 899
 900       _Jv_CallAnyMethodA (obj, return_type, id,
 901                           style == constructor,
 902                           style == normal,
 903                           arg_types, args, NULL);
 904     }
 905   catch (jthrowable t)
 906     {
 907       env->ex = t;
 908     }
 909 }
 910
 911 template<invocation_type style>
 912 static void JNICALL
 913 _Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
 914                            jmethodID method, ...)
 915 {
 916   va_list args;
 917
 918   va_start (args, method);
 919   _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
 920   va_end (args);
 921 }
 922
 923 template<invocation_type style>
 924 static void JNICALL
 925 _Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
 926                             jmethodID id, jvalue *args)
 927 {
 928   jclass decl_class = klass ? klass : obj->getClass ();
 929   JvAssert (decl_class != NULL);
 930
 931   jclass return_type;
 932   JArray<jclass> *arg_types;
 933   try
 934     {
 935       _Jv_GetTypesFromSignature (id, decl_class,
 936                                  &arg_types, &return_type);
 937
 938       // Unwrap arguments as required.  Eww.
 939       jclass *type_elts = elements (arg_types);
 940       jvalue arg_copy[arg_types->length];
 941       for (int i = 0; i < arg_types->length; ++i)
 942         {
 943           if (type_elts[i]->isPrimitive ())
 944             arg_copy[i] = args[i];
 945           else
 946             arg_copy[i].l = unwrap (args[i].l);
 947         }
 948
 949       _Jv_CallAnyMethodA (obj, return_type, id,
 950                           style == constructor,
 951                           style == normal,
 952                           arg_types, args, NULL);
 953     }
 954   catch (jthrowable t)
 955     {
 956       env->ex = t;
 957     }
 958 }
 959
 960 // Functions with this signature are used to implement functions in
 961 // the CallMethod family.
 962 template<typename T>
 963 static T JNICALL
 964 _Jv_JNI_CallMethodV (JNIEnv *env, jobject obj,
 965                      jmethodID id, va_list args)
 966 {
 967   return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
 968 }
 969
 970 // Functions with this signature are used to implement functions in
 971 // the CallMethod family.
 972 template<typename T>
 973 static T JNICALL
 974 _Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
 975 {
 976   va_list args;
 977   T result;
 978
 979   va_start (args, id);
 980   result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
 981   va_end (args);
 982
 983   return result;
 984 }
 985
 986 // Functions with this signature are used to implement functions in
 987 // the CallMethod family.
 988 template<typename T>
 989 static T JNICALL
 990 _Jv_JNI_CallMethodA (JNIEnv *env, jobject obj,
 991                      jmethodID id, jvalue *args)
 992 {
 993   return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
 994 }
 995
 996 static void JNICALL
 997 _Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj,
 998                          jmethodID id, va_list args)
 999 {
1000   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1001 }
1002
1003 static void JNICALL
1004 _Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
1005 {
1006   va_list args;
1007
1008   va_start (args, id);
1009   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1010   va_end (args);
1011 }
1012
1013 static void JNICALL
1014 _Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj,
1015                          jmethodID id, jvalue *args)
1016 {
1017   _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
1018 }
1019
1020 // Functions with this signature are used to implement functions in
1021 // the CallStaticMethod family.
1022 template<typename T>
1023 static T JNICALL
1024 _Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
1025                            jmethodID id, va_list args)
1026 {
1027   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1028   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1029
1030   return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
1031 }
1032
1033 // Functions with this signature are used to implement functions in
1034 // the CallStaticMethod family.
1035 template<typename T>
1036 static T JNICALL
1037 _Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass,
1038                           jmethodID id, ...)
1039 {
1040   va_list args;
1041   T result;
1042
1043   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1044   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1045
1046   va_start (args, id);
1047   result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
1048                                                    id, args);
1049   va_end (args);
1050
1051   return result;
1052 }
1053
1054 // Functions with this signature are used to implement functions in
1055 // the CallStaticMethod family.
1056 template<typename T>
1057 static T JNICALL
1058 _Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
1059                            jvalue *args)
1060 {
1061   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1062   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1063
1064   return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
1065 }
1066
1067 static void JNICALL
1068 _Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass,
1069                                jmethodID id, va_list args)
1070 {
1071   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1072 }
1073
1074 static void JNICALL
1075 _Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass,
1076                               jmethodID id, ...)
1077 {
1078   va_list args;
1079
1080   va_start (args, id);
1081   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1082   va_end (args);
1083 }
1084
1085 static void JNICALL
1086 _Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass,
1087                                jmethodID id, jvalue *args)
1088 {
1089   _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
1090 }
1091
1092 static jobject JNICALL
1093 _Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
1094                     jmethodID id, va_list args)
1095 {
1096   JvAssert (klass && ! klass->isArray ());
1097   JvAssert (! strcmp (id->name->data, "<init>")
1098             && id->signature->length > 2
1099             && id->signature->data[0] == '('
1100             && ! strcmp (&id->signature->data[id->signature->length - 2],
1101                          ")V"));
1102
1103   return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1104                                                        id, args);
1105 }
1106
1107 static jobject JNICALL
1108 _Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
1109 {
1110   JvAssert (klass && ! klass->isArray ());
1111   JvAssert (! strcmp (id->name->data, "<init>")
1112             && id->signature->length > 2
1113             && id->signature->data[0] == '('
1114             && ! strcmp (&id->signature->data[id->signature->length - 2],
1115                          ")V"));
1116
1117   va_list args;
1118   jobject result;
1119
1120   va_start (args, id);
1121   result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1122                                                          id, args);
1123   va_end (args);
1124
1125   return result;
1126 }
1127
1128 static jobject JNICALL
1129 _Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
1130                     jvalue *args)
1131 {
1132   JvAssert (klass && ! klass->isArray ());
1133   JvAssert (! strcmp (id->name->data, "<init>")
1134             && id->signature->length > 2
1135             && id->signature->data[0] == '('
1136             && ! strcmp (&id->signature->data[id->signature->length - 2],
1137                          ")V"));
1138
1139   return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1140                                                        id, args);
1141 }
1142
1143 \f
1144
1145 template<typename T>
1146 static T JNICALL
1147 _Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
1148 {
1149   obj = unwrap (obj);
1150   JvAssert (obj);
1151   T *ptr = (T *) ((char *) obj + field->getOffset ());
1152   return wrap_value (env, *ptr);
1153 }
1154
1155 template<typename T>
1156 static void JNICALL
1157 _Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
1158 {
1159   obj = unwrap (obj);
1160   value = unwrap (value);
1161
1162   JvAssert (obj);
1163   T *ptr = (T *) ((char *) obj + field->getOffset ());
1164   *ptr = value;
1165 }
1166
1167 template<jboolean is_static>
1168 static jfieldID JNICALL
1169 _Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
1170                        const char *name, const char *sig)
1171 {
1172   try
1173     {
1174       clazz = unwrap (clazz);
1175
1176       _Jv_InitClass (clazz);
1177
1178       _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1179
1180       // FIXME: assume that SIG isn't too long.
1181       int len = strlen (sig);
1182       char s[len + 1];
1183       for (int i = 0; i <= len; ++i)
1184         s[i] = (sig[i] == '/') ? '.' : sig[i];
1185       jclass field_class = _Jv_FindClassFromSignature ((char *) s, NULL);
1186
1187       // FIXME: what if field_class == NULL?
1188
1189       java::lang::ClassLoader *loader = clazz->getClassLoaderInternal ();
1190       while (clazz != NULL)
1191         {
1192           // We acquire the class lock so that fields aren't resolved
1193           // while we are running.
1194           JvSynchronize sync (clazz);
1195
1196           jint count = (is_static
1197                         ? JvNumStaticFields (clazz)
1198                         : JvNumInstanceFields (clazz));
1199           jfieldID field = (is_static
1200                             ? JvGetFirstStaticField (clazz)
1201                             : JvGetFirstInstanceField (clazz));
1202           for (jint i = 0; i < count; ++i)
1203             {
1204               _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1205
1206               // The field might be resolved or it might not be.  It
1207               // is much simpler to always resolve it.
1208               _Jv_Linker::resolve_field (field, loader);
1209               if (_Jv_equalUtf8Consts (f_name, a_name)
1210                   && field->getClass() == field_class)
1211                 return field;
1212
1213               field = field->getNextField ();
1214             }
1215
1216           clazz = clazz->getSuperclass ();
1217         }
1218
1219       env->ex = new java::lang::NoSuchFieldError ();
1220     }
1221   catch (jthrowable t)
1222     {
1223       env->ex = t;
1224     }
1225   return NULL;
1226 }
1227
1228 template<typename T>
1229 static T JNICALL
1230 _Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
1231 {
1232   T *ptr = (T *) field->u.addr;
1233   return wrap_value (env, *ptr);
1234 }
1235
1236 template<typename T>
1237 static void JNICALL
1238 _Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
1239 {
1240   value = unwrap (value);
1241   T *ptr = (T *) field->u.addr;
1242   *ptr = value;
1243 }
1244
1245 static jstring JNICALL
1246 _Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
1247 {
1248   try
1249     {
1250       jstring r = _Jv_NewString (unichars, len);
1251       return (jstring) wrap_value (env, r);
1252     }
1253   catch (jthrowable t)
1254     {
1255       env->ex = t;
1256       return NULL;
1257     }
1258 }
1259
1260 static jsize JNICALL
1261 _Jv_JNI_GetStringLength (JNIEnv *, jstring string)
1262 {
1263   return unwrap (string)->length();
1264 }
1265
1266 static const jchar * JNICALL
1267 _Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
1268 {
1269   string = unwrap (string);
1270   jchar *result = _Jv_GetStringChars (string);
1271   mark_for_gc (string, global_ref_table);
1272   if (isCopy)
1273     *isCopy = false;
1274   return (const jchar *) result;
1275 }
1276
1277 static void JNICALL
1278 _Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
1279 {
1280   unmark_for_gc (unwrap (string), global_ref_table);
1281 }
1282
1283 static jstring JNICALL
1284 _Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
1285 {
1286   try
1287     {
1288       jstring result = JvNewStringUTF (bytes);
1289       return (jstring) wrap_value (env, result);
1290     }
1291   catch (jthrowable t)
1292     {
1293       env->ex = t;
1294       return NULL;
1295     }
1296 }
1297
1298 static jsize JNICALL
1299 _Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
1300 {
1301   return JvGetStringUTFLength (unwrap (string));
1302 }
1303
1304 static const char * JNICALL
1305 _Jv_JNI_GetStringUTFChars (JNIEnv *env, jstring string,
1306                            jboolean *isCopy)
1307 {
1308   try
1309     {
1310       string = unwrap (string);
1311       if (string == NULL)
1312         return NULL;
1313       jsize len = JvGetStringUTFLength (string);
1314       char *r = (char *) _Jv_Malloc (len + 1);
1315       JvGetStringUTFRegion (string, 0, string->length(), r);
1316       r[len] = '\0';
1317
1318       if (isCopy)
1319         *isCopy = true;
1320
1321       return (const char *) r;
1322     }
1323   catch (jthrowable t)
1324     {
1325       env->ex = t;
1326       return NULL;
1327     }
1328 }
1329
1330 static void JNICALL
1331 _Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
1332 {
1333   _Jv_Free ((void *) utf);
1334 }
1335
1336 static void JNICALL
1337 _Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start,
1338                          jsize len, jchar *buf)
1339 {
1340   string = unwrap (string);
1341   jchar *result = _Jv_GetStringChars (string);
1342   if (start < 0 || start > string->length ()
1343       || len < 0 || start + len > string->length ())
1344     {
1345       try
1346         {
1347           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1348         }
1349       catch (jthrowable t)
1350         {
1351           env->ex = t;
1352         }
1353     }
1354   else
1355     memcpy (buf, &result[start], len * sizeof (jchar));
1356 }
1357
1358 static void JNICALL
1359 _Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
1360                             jsize len, char *buf)
1361 {
1362   str = unwrap (str);
1363
1364   if (start < 0 || start > str->length ()
1365       || len < 0 || start + len > str->length ())
1366     {
1367       try
1368         {
1369           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1370         }
1371       catch (jthrowable t)
1372         {
1373           env->ex = t;
1374         }
1375     }
1376   else
1377     _Jv_GetStringUTFRegion (str, start, len, buf);
1378 }
1379
1380 static const jchar * JNICALL
1381 _Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
1382 {
1383   jchar *result = _Jv_GetStringChars (unwrap (str));
1384   if (isCopy)
1385     *isCopy = false;
1386   return result;
1387 }
1388
1389 static void JNICALL
1390 _Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
1391 {
1392   // Nothing.
1393 }
1394
1395 static jsize JNICALL
1396 _Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
1397 {
1398   return unwrap (array)->length;
1399 }
1400
1401 static jobjectArray JNICALL
1402 _Jv_JNI_NewObjectArray (JNIEnv *env, jsize length,
1403                         jclass elementClass, jobject init)
1404 {
1405   try
1406     {
1407       elementClass = unwrap (elementClass);
1408       init = unwrap (init);
1409
1410       _Jv_CheckCast (elementClass, init);
1411       jarray result = JvNewObjectArray (length, elementClass, init);
1412       return (jobjectArray) wrap_value (env, result);
1413     }
1414   catch (jthrowable t)
1415     {
1416       env->ex = t;
1417       return NULL;
1418     }
1419 }
1420
1421 static jobject JNICALL
1422 _Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array,
1423                                jsize index)
1424 {
1425   if ((unsigned) index >= (unsigned) array->length)
1426     _Jv_ThrowBadArrayIndex (index);
1427   jobject *elts = elements (unwrap (array));
1428   return wrap_value (env, elts[index]);
1429 }
1430
1431 static void JNICALL
1432 _Jv_JNI_SetObjectArrayElement (JNIEnv *env, jobjectArray array,
1433                                jsize index, jobject value)
1434 {
1435   try
1436     {
1437       array = unwrap (array);
1438       value = unwrap (value);
1439
1440       _Jv_CheckArrayStore (array, value);
1441       if ((unsigned) index >= (unsigned) array->length)
1442         _Jv_ThrowBadArrayIndex (index);
1443       jobject *elts = elements (array);
1444       elts[index] = value;
1445     }
1446   catch (jthrowable t)
1447     {
1448       env->ex = t;
1449     }
1450 }
1451
1452 template<typename T, jclass K>
1453 static JArray<T> * JNICALL
1454 _Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
1455 {
1456   try
1457     {
1458       return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1459     }
1460   catch (jthrowable t)
1461     {
1462       env->ex = t;
1463       return NULL;
1464     }
1465 }
1466
1467 template<typename T, jclass K>
1468 static T * JNICALL
1469 _Jv_JNI_GetPrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1470                                    jboolean *isCopy)
1471 {
1472   array = unwrap (array);
1473   if (! _Jv_JNI_check_types (env, array, K))
1474     return NULL;
1475   T *elts = elements (array);
1476   if (isCopy)
1477     {
1478       // We elect never to copy.
1479       *isCopy = false;
1480     }
1481   mark_for_gc (array, global_ref_table);
1482   return elts;
1483 }
1484
1485 template<typename T, jclass K>
1486 static void JNICALL
1487 _Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1488                                        T *, jint /* mode */)
1489 {
1490   array = unwrap (array);
1491   _Jv_JNI_check_types (env, array, K);
1492   // Note that we ignore MODE.  We can do this because we never copy
1493   // the array elements.  My reading of the JNI documentation is that
1494   // this is an option for the implementor.
1495   unmark_for_gc (array, global_ref_table);
1496 }
1497
1498 template<typename T, jclass K>
1499 static void JNICALL
1500 _Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1501                                  jsize start, jsize len,
1502                                  T *buf)
1503 {
1504   array = unwrap (array);
1505   if (! _Jv_JNI_check_types (env, array, K))
1506     return;
1507
1508   // The cast to unsigned lets us save a comparison.
1509   if (start < 0 || len < 0
1510       || (unsigned long) (start + len) > (unsigned long) array->length)
1511     {
1512       try
1513         {
1514           // FIXME: index.
1515           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1516         }
1517       catch (jthrowable t)
1518         {
1519           // Could have thown out of memory error.
1520           env->ex = t;
1521         }
1522     }
1523   else
1524     {
1525       T *elts = elements (array) + start;
1526       memcpy (buf, elts, len * sizeof (T));
1527     }
1528 }
1529
1530 template<typename T, jclass K>
1531 static void JNICALL
1532 _Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1533                                  jsize start, jsize len, T *buf)
1534 {
1535   array = unwrap (array);
1536   if (! _Jv_JNI_check_types (env, array, K))
1537     return;
1538
1539   // The cast to unsigned lets us save a comparison.
1540   if (start < 0 || len < 0
1541       || (unsigned long) (start + len) > (unsigned long) array->length)
1542     {
1543       try
1544         {
1545           // FIXME: index.
1546           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1547         }
1548       catch (jthrowable t)
1549         {
1550           env->ex = t;
1551         }
1552     }
1553   else
1554     {
1555       T *elts = elements (array) + start;
1556       memcpy (elts, buf, len * sizeof (T));
1557     }
1558 }
1559
1560 static void * JNICALL
1561 _Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
1562                                    jboolean *isCopy)
1563 {
1564   array = unwrap (array);
1565   // FIXME: does this work?
1566   jclass klass = array->getClass()->getComponentType();
1567   JvAssert (klass->isPrimitive ());
1568   char *r = _Jv_GetArrayElementFromElementType (array, klass);
1569   if (isCopy)
1570     *isCopy = false;
1571   return r;
1572 }
1573
1574 static void JNICALL
1575 _Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
1576 {
1577   // Nothing.
1578 }
1579
1580 static jint JNICALL
1581 _Jv_JNI_MonitorEnter (JNIEnv *env, jobject obj)
1582 {
1583   try
1584     {
1585       _Jv_MonitorEnter (unwrap (obj));
1586       return 0;
1587     }
1588   catch (jthrowable t)
1589     {
1590       env->ex = t;
1591     }
1592   return JNI_ERR;
1593 }
1594
1595 static jint JNICALL
1596 _Jv_JNI_MonitorExit (JNIEnv *env, jobject obj)
1597 {
1598   try
1599     {
1600       _Jv_MonitorExit (unwrap (obj));
1601       return 0;
1602     }
1603   catch (jthrowable t)
1604     {
1605       env->ex = t;
1606     }
1607   return JNI_ERR;
1608 }
1609
1610 // JDK 1.2
1611 jobject JNICALL
1612 _Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
1613                           jboolean)
1614 {
1615   try
1616     {
1617       cls = unwrap (cls);
1618       java::lang::reflect::Field *field = new java::lang::reflect::Field();
1619       field->declaringClass = cls;
1620       field->offset = (char*) fieldID - (char *) cls->fields;
1621       field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1622       return wrap_value (env, field);
1623     }
1624   catch (jthrowable t)
1625     {
1626       env->ex = t;
1627     }
1628   return NULL;
1629 }
1630
1631 // JDK 1.2
1632 static jfieldID JNICALL
1633 _Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
1634 {
1635   using namespace java::lang::reflect;
1636
1637   f = unwrap (f);
1638   Field *field = reinterpret_cast<Field *> (f);
1639   return _Jv_FromReflectedField (field);
1640 }
1641
1642 jobject JNICALL
1643 _Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
1644                            jboolean)
1645 {
1646   using namespace java::lang::reflect;
1647
1648   jobject result = NULL;
1649   klass = unwrap (klass);
1650
1651   try
1652     {
1653       if (_Jv_equalUtf8Consts (id->name, init_name))
1654         {
1655           // A constructor.
1656           Constructor *cons = new Constructor ();
1657           cons->offset = (char *) id - (char *) &klass->methods;
1658           cons->declaringClass = klass;
1659           result = cons;
1660         }
1661       else
1662         {
1663           Method *meth = new Method ();
1664           meth->offset = (char *) id - (char *) &klass->methods;
1665           meth->declaringClass = klass;
1666           result = meth;
1667         }
1668     }
1669   catch (jthrowable t)
1670     {
1671       env->ex = t;
1672     }
1673
1674   return wrap_value (env, result);
1675 }
1676
1677 static jmethodID JNICALL
1678 _Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
1679 {
1680   using namespace java::lang::reflect;
1681   method = unwrap (method);
1682   if (Method::class$.isInstance (method))
1683     return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1684   return
1685     _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1686 }
1687
1688 // JDK 1.2.
1689 jweak JNICALL
1690 _Jv_JNI_NewWeakGlobalRef (JNIEnv *env, jobject obj)
1691 {
1692   using namespace gnu::gcj::runtime;
1693   JNIWeakRef *ref = NULL;
1694
1695   try
1696     {
1697       // This seems weird but I think it is correct.
1698       obj = unwrap (obj);
1699       ref = new JNIWeakRef (obj);
1700       mark_for_gc (ref, global_ref_table);
1701     }
1702   catch (jthrowable t)
1703     {
1704       env->ex = t;
1705     }
1706
1707   return reinterpret_cast<jweak> (ref);
1708 }
1709
1710 void JNICALL
1711 _Jv_JNI_DeleteWeakGlobalRef (JNIEnv *, jweak obj)
1712 {
1713   using namespace gnu::gcj::runtime;
1714   JNIWeakRef *ref = reinterpret_cast<JNIWeakRef *> (obj);
1715   unmark_for_gc (ref, global_ref_table);
1716   ref->clear ();
1717 }
1718
1719 \f
1720
1721 // Direct byte buffers.
1722
1723 static jobject JNICALL
1724 _Jv_JNI_NewDirectByteBuffer (JNIEnv *, void *address, jlong length)
1725 {
1726   using namespace gnu::gcj;
1727   using namespace java::nio;
1728   return new DirectByteBufferImpl$ReadWrite
1729     (reinterpret_cast<RawData *> (address), length);
1730 }
1731
1732 static void * JNICALL
1733 _Jv_JNI_GetDirectBufferAddress (JNIEnv *, jobject buffer)
1734 {
1735   using namespace java::nio;
1736   DirectByteBufferImpl* bb = static_cast<DirectByteBufferImpl *> (buffer);
1737   return reinterpret_cast<void *> (bb->address);
1738 }
1739
1740 static jlong JNICALL
1741 _Jv_JNI_GetDirectBufferCapacity (JNIEnv *, jobject buffer)
1742 {
1743   using namespace java::nio;
1744   DirectByteBufferImpl* bb = static_cast<DirectByteBufferImpl *> (buffer);
1745   return bb->capacity();
1746 }
1747
1748 \f
1749
1750 // Hash table of native methods.
1751 static JNINativeMethod *nathash;
1752 // Number of slots used.
1753 static int nathash_count = 0;
1754 // Number of slots available.  Must be power of 2.
1755 static int nathash_size = 0;
1756
1757 #define DELETED_ENTRY ((char *) (~0))
1758
1759 // Compute a hash value for a native method descriptor.
1760 static int
1761 hash (const JNINativeMethod *method)
1762 {
1763   char *ptr;
1764   int hash = 0;
1765
1766   ptr = method->name;
1767   while (*ptr)
1768     hash = (31 * hash) + *ptr++;
1769
1770   ptr = method->signature;
1771   while (*ptr)
1772     hash = (31 * hash) + *ptr++;
1773
1774   return hash;
1775 }
1776
1777 // Find the slot where a native method goes.
1778 static JNINativeMethod *
1779 nathash_find_slot (const JNINativeMethod *method)
1780 {
1781   jint h = hash (method);
1782   int step = (h ^ (h >> 16)) | 1;
1783   int w = h & (nathash_size - 1);
1784   int del = -1;
1785
1786   for (;;)
1787     {
1788       JNINativeMethod *slotp = &nathash[w];
1789       if (slotp->name == NULL)
1790         {
1791           if (del >= 0)
1792             return &nathash[del];
1793           else
1794             return slotp;
1795         }
1796       else if (slotp->name == DELETED_ENTRY)
1797         del = w;
1798       else if (! strcmp (slotp->name, method->name)
1799                && ! strcmp (slotp->signature, method->signature))
1800         return slotp;
1801       w = (w + step) & (nathash_size - 1);
1802     }
1803 }
1804
1805 // Find a method.  Return NULL if it isn't in the hash table.
1806 static void *
1807 nathash_find (JNINativeMethod *method)
1808 {
1809   if (nathash == NULL)
1810     return NULL;
1811   JNINativeMethod *slot = nathash_find_slot (method);
1812   if (slot->name == NULL || slot->name == DELETED_ENTRY)
1813     return NULL;
1814   return slot->fnPtr;
1815 }
1816
1817 static void
1818 natrehash ()
1819 {
1820   if (nathash == NULL)
1821     {
1822       nathash_size = 1024;
1823       nathash =
1824         (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1825                                             * sizeof (JNINativeMethod));
1826       memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1827     }
1828   else
1829     {
1830       int savesize = nathash_size;
1831       JNINativeMethod *savehash = nathash;
1832       nathash_size *= 2;
1833       nathash =
1834         (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1835                                             * sizeof (JNINativeMethod));
1836       memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1837
1838       for (int i = 0; i < savesize; ++i)
1839         {
1840           if (savehash[i].name != NULL && savehash[i].name != DELETED_ENTRY)
1841             {
1842               JNINativeMethod *slot = nathash_find_slot (&savehash[i]);
1843               *slot = savehash[i];
1844             }
1845         }
1846     }
1847 }
1848
1849 static void
1850 nathash_add (const JNINativeMethod *method)
1851 {
1852   if (3 * nathash_count >= 2 * nathash_size)
1853     natrehash ();
1854   JNINativeMethod *slot = nathash_find_slot (method);
1855   // If the slot has a real entry in it, then there is no work to do.
1856   if (slot->name != NULL && slot->name != DELETED_ENTRY)
1857     return;
1858   // FIXME
1859   slot->name = strdup (method->name);
1860   slot->signature = strdup (method->signature);
1861   slot->fnPtr = method->fnPtr;
1862 }
1863
1864 static jint JNICALL
1865 _Jv_JNI_RegisterNatives (JNIEnv *env, jclass klass,
1866                          const JNINativeMethod *methods,
1867                          jint nMethods)
1868 {
1869   // Synchronize while we do the work.  This must match
1870   // synchronization in some other functions that manipulate or use
1871   // the nathash table.
1872   JvSynchronize sync (global_ref_table);
1873
1874   // Look at each descriptor given us, and find the corresponding
1875   // method in the class.
1876   for (int j = 0; j < nMethods; ++j)
1877     {
1878       bool found = false;
1879
1880       _Jv_Method *imeths = JvGetFirstMethod (klass);
1881       for (int i = 0; i < JvNumMethods (klass); ++i)
1882         {
1883           _Jv_Method *self = &imeths[i];
1884
1885           if (! strcmp (self->name->chars (), methods[j].name)
1886               && ! strcmp (self->signature->chars (), methods[j].signature))
1887             {
1888               if (! (self->accflags & java::lang::reflect::Modifier::NATIVE))
1889                 break;
1890
1891               // Found a match that is native.
1892               found = true;
1893               nathash_add (&methods[j]);
1894
1895               break;
1896             }
1897         }
1898
1899       if (! found)
1900         {
1901           jstring m = JvNewStringUTF (methods[j].name);
1902           try
1903             {
1904               env->ex = new java::lang::NoSuchMethodError (m);
1905             }
1906           catch (jthrowable t)
1907             {
1908               env->ex = t;
1909             }
1910           return JNI_ERR;
1911         }
1912     }
1913
1914   return JNI_OK;
1915 }
1916
1917 static jint JNICALL
1918 _Jv_JNI_UnregisterNatives (JNIEnv *, jclass)
1919 {
1920   // FIXME -- we could implement this.
1921   return JNI_ERR;
1922 }
1923
1924 \f
1925
1926 // Add a character to the buffer, encoding properly.
1927 static void
1928 add_char (char *buf, jchar c, int *here)
1929 {
1930   if (c == '_')
1931     {
1932       buf[(*here)++] = '_';
1933       buf[(*here)++] = '1';
1934     }
1935   else if (c == ';')
1936     {
1937       buf[(*here)++] = '_';
1938       buf[(*here)++] = '2';
1939     }
1940   else if (c == '[')
1941     {
1942       buf[(*here)++] = '_';
1943       buf[(*here)++] = '3';
1944     }
1945
1946   // Also check for `.' here because we might be passed an internal
1947   // qualified class name like `foo.bar'.
1948   else if (c == '/' || c == '.')
1949     buf[(*here)++] = '_';
1950   else if ((c >= '0' && c <= '9')
1951            || (c >= 'a' && c <= 'z')
1952            || (c >= 'A' && c <= 'Z'))
1953     buf[(*here)++] = (char) c;
1954   else
1955     {
1956       // "Unicode" character.
1957       buf[(*here)++] = '_';
1958       buf[(*here)++] = '0';
1959       for (int i = 0; i < 4; ++i)
1960         {
1961           int val = c & 0x0f;
1962           buf[(*here) + 3 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
1963           c >>= 4;
1964         }
1965       *here += 4;
1966     }
1967 }
1968
1969 // Compute a mangled name for a native function.  This computes the
1970 // long name, and also returns an index which indicates where a NUL
1971 // can be placed to create the short name.  This function assumes that
1972 // the buffer is large enough for its results.
1973 static void
1974 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
1975               _Jv_Utf8Const *signature, char *buf, int *long_start)
1976 {
1977   strcpy (buf, "Java_");
1978   int here = 5;
1979
1980   // Add fully qualified class name.
1981   jchar *chars = _Jv_GetStringChars (klass->getName ());
1982   jint len = klass->getName ()->length ();
1983   for (int i = 0; i < len; ++i)
1984     add_char (buf, chars[i], &here);
1985
1986   // Don't use add_char because we need a literal `_'.
1987   buf[here++] = '_';
1988
1989   const unsigned char *fn = (const unsigned char *) func_name->chars ();
1990   const unsigned char *limit = fn + func_name->len ();
1991   for (int i = 0; ; ++i)
1992     {
1993       int ch = UTF8_GET (fn, limit);
1994       if (ch < 0)
1995         break;
1996       add_char (buf, ch, &here);
1997     }
1998
1999   // This is where the long signature begins.
2000   *long_start = here;
2001   buf[here++] = '_';
2002   buf[here++] = '_';
2003
2004   const unsigned char *sig = (const unsigned char *) signature->chars ();
2005   limit = sig + signature->len ();
2006   JvAssert (sig[0] == '(');
2007   ++sig;
2008   while (1)
2009     {
2010       int ch = UTF8_GET (sig, limit);
2011       if (ch == ')' || ch < 0)
2012         break;
2013       add_char (buf, ch, &here);
2014     }
2015
2016   buf[here] = '\0';
2017 }
2018
2019 // Return the current thread's JNIEnv; if one does not exist, create
2020 // it.  Also create a new system frame for use.  This is `extern "C"'
2021 // because the compiler calls it.
2022 extern "C" JNIEnv *
2023 _Jv_GetJNIEnvNewFrame (jclass klass)
2024 {
2025   JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2026   if (env == NULL)
2027     {
2028       env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2029       env->p = &_Jv_JNIFunctions;
2030       env->klass = klass;
2031       env->locals = NULL;
2032       // We set env->ex below.
2033
2034       _Jv_SetCurrentJNIEnv (env);
2035     }
2036
2037   _Jv_JNI_LocalFrame *frame
2038     = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2039                                                   + (FRAME_SIZE
2040                                                      * sizeof (jobject)));
2041
2042   frame->marker = MARK_SYSTEM;
2043   frame->size = FRAME_SIZE;
2044   frame->next = env->locals;
2045
2046   for (int i = 0; i < frame->size; ++i)
2047     frame->vec[i] = NULL;
2048
2049   env->locals = frame;
2050   env->ex = NULL;
2051
2052   return env;
2053 }
2054
2055 // Return the function which implements a particular JNI method.  If
2056 // we can't find the function, we throw the appropriate exception.
2057 // This is `extern "C"' because the compiler uses it.
2058 extern "C" void *
2059 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
2060                      _Jv_Utf8Const *signature, MAYBE_UNUSED int args_size)
2061 {
2062   int name_length = name->len();
2063   int sig_length = signature->len();
2064   char buf[10 + 6 * (name_length + sig_length) + 12];
2065   int long_start;
2066   void *function;
2067
2068   // Synchronize on something convenient.  Right now we use the hash.
2069   JvSynchronize sync (global_ref_table);
2070
2071   // First see if we have an override in the hash table.
2072   strncpy (buf, name->chars (), name_length);
2073   buf[name_length] = '\0';
2074   strncpy (buf + name_length + 1, signature->chars (), sig_length);
2075   buf[name_length + sig_length + 1] = '\0';
2076   JNINativeMethod meth;
2077   meth.name = buf;
2078   meth.signature = buf + name_length + 1;
2079   function = nathash_find (&meth);
2080   if (function != NULL)
2081     return function;
2082
2083   // If there was no override, then look in the symbol table.
2084   buf[0] = '_';
2085   mangled_name (klass, name, signature, buf + 1, &long_start);
2086   char c = buf[long_start + 1];
2087   buf[long_start + 1] = '\0';
2088
2089   function = _Jv_FindSymbolInExecutable (buf + 1);
2090 #ifdef WIN32
2091   // On Win32, we use the "stdcall" calling convention (see JNICALL
2092   // in jni.h).
2093   //
2094   // For a function named 'fooBar' that takes 'nn' bytes as arguments,
2095   // by default, MinGW GCC exports it as 'fooBar@nn', MSVC exports it
2096   // as '_fooBar@nn' and Borland C exports it as 'fooBar'. We try to
2097   // take care of all these variations here.
2098
2099   char asz_buf[12];    /* '@' + '2147483647' (32-bit INT_MAX) + '\0' */
2100   char long_nm_sv[11]; /* Ditto, except for the '\0'. */
2101
2102   if (function == NULL)
2103     {
2104       // We have tried searching for the 'fooBar' form (BCC) - now
2105       // try the others.
2106
2107       // First, save the part of the long name that will be damaged
2108       // by appending '@nn'.
2109       memcpy (long_nm_sv, (buf + long_start + 1 + 1), sizeof (long_nm_sv));
2110
2111       sprintf (asz_buf, "@%d", args_size);
2112       strcat (buf, asz_buf);
2113
2114       // Search for the '_fooBar@nn' form (MSVC).
2115       function = _Jv_FindSymbolInExecutable (buf);
2116
2117       if (function == NULL)
2118         {
2119           // Search for the 'fooBar@nn' form (MinGW GCC).
2120           function = _Jv_FindSymbolInExecutable (buf + 1);
2121         }
2122     }
2123 #endif /* WIN32 */
2124
2125   if (function == NULL)
2126     {
2127       buf[long_start + 1] = c;
2128 #ifdef WIN32
2129       // Restore the part of the long name that was damaged by
2130       // appending the '@nn'.
2131       memcpy ((buf + long_start + 1 + 1), long_nm_sv, sizeof (long_nm_sv));
2132 #endif /* WIN32 */
2133       function = _Jv_FindSymbolInExecutable (buf + 1);
2134       if (function == NULL)
2135         {
2136 #ifdef WIN32
2137           strcat (buf, asz_buf);
2138           function = _Jv_FindSymbolInExecutable (buf);
2139           if (function == NULL)
2140             function = _Jv_FindSymbolInExecutable (buf + 1);
2141
2142           if (function == NULL)
2143 #endif /* WIN32 */
2144             {
2145               jstring str = JvNewStringUTF (name->chars ());
2146               throw new java::lang::UnsatisfiedLinkError (str);
2147             }
2148         }
2149     }
2150
2151   return function;
2152 }
2153
2154 #ifdef INTERPRETER
2155
2156 // This function is the stub which is used to turn an ordinary (CNI)
2157 // method call into a JNI call.
2158 void
2159 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
2160 {
2161   _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
2162
2163   JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
2164
2165   // FIXME: we should mark every reference parameter as a local.  For
2166   // now we assume a conservative GC, and we assume that the
2167   // references are on the stack somewhere.
2168
2169   // We cache the value that we find, of course, but if we don't find
2170   // a value we don't cache that fact -- we might subsequently load a
2171   // library which finds the function in question.
2172   {
2173     // Synchronize on a convenient object to ensure sanity in case two
2174     // threads reach this point for the same function at the same
2175     // time.
2176     JvSynchronize sync (global_ref_table);
2177     if (_this->function == NULL)
2178       {
2179         int args_size = sizeof (JNIEnv *) + _this->args_raw_size;
2180
2181         if (_this->self->accflags & java::lang::reflect::Modifier::STATIC)
2182           args_size += sizeof (_this->defining_class);
2183
2184         _this->function = _Jv_LookupJNIMethod (_this->defining_class,
2185                                                _this->self->name,
2186                                                _this->self->signature,
2187                                                args_size);
2188       }
2189   }
2190
2191   JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
2192   ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
2193   int offset = 0;
2194
2195   // First argument is always the environment pointer.
2196   real_args[offset++].ptr = env;
2197
2198   // For a static method, we pass in the Class.  For non-static
2199   // methods, the `this' argument is already handled.
2200   if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2201     real_args[offset++].ptr = _this->defining_class;
2202
2203   // In libgcj, the callee synchronizes.
2204   jobject sync = NULL;
2205   if ((_this->self->accflags & java::lang::reflect::Modifier::SYNCHRONIZED))
2206     {
2207       if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2208         sync = _this->defining_class;
2209       else
2210         sync = (jobject) args[0].ptr;
2211       _Jv_MonitorEnter (sync);
2212     }
2213
2214   // Copy over passed-in arguments.
2215   memcpy (&real_args[offset], args, _this->args_raw_size);
2216
2217   // The actual call to the JNI function.
2218 #if FFI_NATIVE_RAW_API
2219   ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2220                 ret, real_args);
2221 #else
2222   ffi_java_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2223                      ret, real_args);
2224 #endif
2225
2226   if (sync != NULL)
2227     _Jv_MonitorExit (sync);
2228
2229   _Jv_JNI_PopSystemFrame (env);
2230 }
2231
2232 #endif /* INTERPRETER */
2233
2234 \f
2235
2236 //
2237 // Invocation API.
2238 //
2239
2240 // An internal helper function.
2241 static jint
2242 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv,
2243                              void *args, jboolean is_daemon)
2244 {
2245   JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
2246   java::lang::ThreadGroup *group = NULL;
2247
2248   if (attach)
2249     {
2250       // FIXME: do we really want to support 1.1?
2251       if (attach->version != JNI_VERSION_1_4
2252           && attach->version != JNI_VERSION_1_2
2253           && attach->version != JNI_VERSION_1_1)
2254         return JNI_EVERSION;
2255
2256       JvAssert (java::lang::ThreadGroup::class$.isInstance (attach->group));
2257       group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
2258     }
2259
2260   // Attaching an already-attached thread is a no-op.
2261   if (_Jv_GetCurrentJNIEnv () != NULL)
2262     return 0;
2263
2264   JNIEnv *env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2265   if (env == NULL)
2266     return JNI_ERR;
2267   env->p = &_Jv_JNIFunctions;
2268   env->ex = NULL;
2269   env->klass = NULL;
2270   env->locals
2271     = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2272                                                   + (FRAME_SIZE
2273                                                      * sizeof (jobject)));
2274   if (env->locals == NULL)
2275     {
2276       _Jv_Free (env);
2277       return JNI_ERR;
2278     }
2279
2280   env->locals->marker = MARK_SYSTEM;
2281   env->locals->size = FRAME_SIZE;
2282   env->locals->next = NULL;
2283
2284   for (int i = 0; i < env->locals->size; ++i)
2285     env->locals->vec[i] = NULL;
2286
2287   *penv = reinterpret_cast<void *> (env);
2288
2289   // This thread might already be a Java thread -- this function might
2290   // have been called simply to set the new JNIEnv.
2291   if (_Jv_ThreadCurrent () == NULL)
2292     {
2293       try
2294         {
2295           if (is_daemon)
2296             _Jv_AttachCurrentThreadAsDaemon (name, group);
2297           else
2298             _Jv_AttachCurrentThread (name, group);
2299         }
2300       catch (jthrowable t)
2301         {
2302           return JNI_ERR;
2303         }
2304     }
2305   _Jv_SetCurrentJNIEnv (env);
2306
2307   return 0;
2308 }
2309
2310 // This is the one actually used by JNI.
2311 static jint JNICALL
2312 _Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
2313 {
2314   return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, false);
2315 }
2316
2317 static jint JNICALL
2318 _Jv_JNI_AttachCurrentThreadAsDaemon (JavaVM *vm, void **penv,
2319                                      void *args)
2320 {
2321   return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, true);
2322 }
2323
2324 static jint JNICALL
2325 _Jv_JNI_DestroyJavaVM (JavaVM *vm)
2326 {
2327   JvAssert (the_vm && vm == the_vm);
2328
2329   JNIEnv *env;
2330   if (_Jv_ThreadCurrent () != NULL)
2331     {
2332       jstring main_name;
2333       // This sucks.
2334       try
2335         {
2336           main_name = JvNewStringLatin1 ("main");
2337         }
2338       catch (jthrowable t)
2339         {
2340           return JNI_ERR;
2341         }
2342
2343       jint r = _Jv_JNI_AttachCurrentThread (vm, main_name,
2344                                             reinterpret_cast<void **> (&env),
2345                                             NULL, false);
2346       if (r < 0)
2347         return r;
2348     }
2349   else
2350     env = _Jv_GetCurrentJNIEnv ();
2351
2352   _Jv_ThreadWait ();
2353
2354   // Docs say that this always returns an error code.
2355   return JNI_ERR;
2356 }
2357
2358 jint JNICALL
2359 _Jv_JNI_DetachCurrentThread (JavaVM *)
2360 {
2361   jint code = _Jv_DetachCurrentThread ();
2362   return code  ? JNI_EDETACHED : 0;
2363 }
2364
2365 static jint JNICALL
2366 _Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
2367 {
2368   if (_Jv_ThreadCurrent () == NULL)
2369     {
2370       *penv = NULL;
2371       return JNI_EDETACHED;
2372     }
2373
2374 #ifdef ENABLE_JVMPI
2375   // Handle JVMPI requests.
2376   if (version == JVMPI_VERSION_1)
2377     {
2378       *penv = (void *) &_Jv_JVMPI_Interface;
2379       return 0;
2380     }
2381 #endif
2382
2383   // FIXME: do we really want to support 1.1?
2384   if (version != JNI_VERSION_1_4 && version != JNI_VERSION_1_2
2385       && version != JNI_VERSION_1_1)
2386     {
2387       *penv = NULL;
2388       return JNI_EVERSION;
2389     }
2390
2391   *penv = (void *) _Jv_GetCurrentJNIEnv ();
2392   return 0;
2393 }
2394
2395 jint JNICALL
2396 JNI_GetDefaultJavaVMInitArgs (void *args)
2397 {
2398   jint version = * (jint *) args;
2399   // Here we only support 1.2 and 1.4.
2400   if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2401     return JNI_EVERSION;
2402
2403   JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2404   ia->version = JNI_VERSION_1_4;
2405   ia->nOptions = 0;
2406   ia->options = NULL;
2407   ia->ignoreUnrecognized = true;
2408
2409   return 0;
2410 }
2411
2412 jint JNICALL
2413 JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
2414 {
2415   JvAssert (! the_vm);
2416
2417   _Jv_CreateJavaVM (NULL);
2418
2419   // FIXME: synchronize
2420   JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2421   if (nvm == NULL)
2422     return JNI_ERR;
2423   nvm->functions = &_Jv_JNI_InvokeFunctions;
2424
2425   // Parse the arguments.
2426   if (args != NULL)
2427     {
2428       jint version = * (jint *) args;
2429       // We only support 1.2 and 1.4.
2430       if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2431         return JNI_EVERSION;
2432       JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2433       for (int i = 0; i < ia->nOptions; ++i)
2434         {
2435           if (! strcmp (ia->options[i].optionString, "vfprintf")
2436               || ! strcmp (ia->options[i].optionString, "exit")
2437               || ! strcmp (ia->options[i].optionString, "abort"))
2438             {
2439               // We are required to recognize these, but for now we
2440               // don't handle them in any way.  FIXME.
2441               continue;
2442             }
2443           else if (! strncmp (ia->options[i].optionString,
2444                               "-verbose", sizeof ("-verbose") - 1))
2445             {
2446               // We don't do anything with this option either.  We
2447               // might want to make sure the argument is valid, but we
2448               // don't really care all that much for now.
2449               continue;
2450             }
2451           else if (! strncmp (ia->options[i].optionString, "-D", 2))
2452             {
2453               // FIXME.
2454               continue;
2455             }
2456           else if (ia->ignoreUnrecognized)
2457             {
2458               if (ia->options[i].optionString[0] == '_'
2459                   || ! strncmp (ia->options[i].optionString, "-X", 2))
2460                 continue;
2461             }
2462
2463           return JNI_ERR;
2464         }
2465     }
2466
2467   jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
2468   if (r < 0)
2469     return r;
2470
2471   the_vm = nvm;
2472   *vm = the_vm;
2473
2474   return 0;
2475 }
2476
2477 jint JNICALL
2478 JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
2479 {
2480   if (buf_len <= 0)
2481     return JNI_ERR;
2482
2483   // We only support a single VM.
2484   if (the_vm != NULL)
2485     {
2486       vm_buffer[0] = the_vm;
2487       *n_vms = 1;
2488     }
2489   else
2490     *n_vms = 0;
2491   return 0;
2492 }
2493
2494 JavaVM *
2495 _Jv_GetJavaVM ()
2496 {
2497   // FIXME: synchronize
2498   if (! the_vm)
2499     {
2500       JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2501       if (nvm != NULL)
2502         nvm->functions = &_Jv_JNI_InvokeFunctions;
2503       the_vm = nvm;
2504     }
2505
2506   // If this is a Java thread, we want to make sure it has an
2507   // associated JNIEnv.
2508   if (_Jv_ThreadCurrent () != NULL)
2509     {
2510       void *ignore;
2511       _Jv_JNI_AttachCurrentThread (the_vm, &ignore, NULL);
2512     }
2513
2514   return the_vm;
2515 }
2516
2517 static jint JNICALL
2518 _Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
2519 {
2520   *vm = _Jv_GetJavaVM ();
2521   return *vm == NULL ? JNI_ERR : JNI_OK;
2522 }
2523
2524 \f
2525
2526 #define RESERVED NULL
2527
2528 struct JNINativeInterface _Jv_JNIFunctions =
2529 {
2530   RESERVED,
2531   RESERVED,
2532   RESERVED,
2533   RESERVED,
2534   _Jv_JNI_GetVersion,           // GetVersion
2535   _Jv_JNI_DefineClass,          // DefineClass
2536   _Jv_JNI_FindClass,            // FindClass
2537   _Jv_JNI_FromReflectedMethod,  // FromReflectedMethod
2538   _Jv_JNI_FromReflectedField,   // FromReflectedField
2539   _Jv_JNI_ToReflectedMethod,    // ToReflectedMethod
2540   _Jv_JNI_GetSuperclass,        // GetSuperclass
2541   _Jv_JNI_IsAssignableFrom,     // IsAssignableFrom
2542   _Jv_JNI_ToReflectedField,     // ToReflectedField
2543   _Jv_JNI_Throw,                // Throw
2544   _Jv_JNI_ThrowNew,             // ThrowNew
2545   _Jv_JNI_ExceptionOccurred,    // ExceptionOccurred
2546   _Jv_JNI_ExceptionDescribe,    // ExceptionDescribe
2547   _Jv_JNI_ExceptionClear,       // ExceptionClear
2548   _Jv_JNI_FatalError,           // FatalError
2549
2550   _Jv_JNI_PushLocalFrame,       // PushLocalFrame
2551   _Jv_JNI_PopLocalFrame,        // PopLocalFrame
2552   _Jv_JNI_NewGlobalRef,         // NewGlobalRef
2553   _Jv_JNI_DeleteGlobalRef,      // DeleteGlobalRef
2554   _Jv_JNI_DeleteLocalRef,       // DeleteLocalRef
2555
2556   _Jv_JNI_IsSameObject,         // IsSameObject
2557
2558   _Jv_JNI_NewLocalRef,          // NewLocalRef
2559   _Jv_JNI_EnsureLocalCapacity,  // EnsureLocalCapacity
2560
2561   _Jv_JNI_AllocObject,              // AllocObject
2562   _Jv_JNI_NewObject,                // NewObject
2563   _Jv_JNI_NewObjectV,               // NewObjectV
2564   _Jv_JNI_NewObjectA,               // NewObjectA
2565   _Jv_JNI_GetObjectClass,           // GetObjectClass
2566   _Jv_JNI_IsInstanceOf,             // IsInstanceOf
2567   _Jv_JNI_GetAnyMethodID<false>,    // GetMethodID
2568
2569   _Jv_JNI_CallMethod<jobject>,          // CallObjectMethod
2570   _Jv_JNI_CallMethodV<jobject>,         // CallObjectMethodV
2571   _Jv_JNI_CallMethodA<jobject>,         // CallObjectMethodA
2572   _Jv_JNI_CallMethod<jboolean>,         // CallBooleanMethod
2573   _Jv_JNI_CallMethodV<jboolean>,        // CallBooleanMethodV
2574   _Jv_JNI_CallMethodA<jboolean>,        // CallBooleanMethodA
2575   _Jv_JNI_CallMethod<jbyte>,            // CallByteMethod
2576   _Jv_JNI_CallMethodV<jbyte>,           // CallByteMethodV
2577   _Jv_JNI_CallMethodA<jbyte>,           // CallByteMethodA
2578   _Jv_JNI_CallMethod<jchar>,            // CallCharMethod
2579   _Jv_JNI_CallMethodV<jchar>,           // CallCharMethodV
2580   _Jv_JNI_CallMethodA<jchar>,           // CallCharMethodA
2581   _Jv_JNI_CallMethod<jshort>,           // CallShortMethod
2582   _Jv_JNI_CallMethodV<jshort>,          // CallShortMethodV
2583   _Jv_JNI_CallMethodA<jshort>,          // CallShortMethodA
2584   _Jv_JNI_CallMethod<jint>,             // CallIntMethod
2585   _Jv_JNI_CallMethodV<jint>,            // CallIntMethodV
2586   _Jv_JNI_CallMethodA<jint>,            // CallIntMethodA
2587   _Jv_JNI_CallMethod<jlong>,            // CallLongMethod
2588   _Jv_JNI_CallMethodV<jlong>,           // CallLongMethodV
2589   _Jv_JNI_CallMethodA<jlong>,           // CallLongMethodA
2590   _Jv_JNI_CallMethod<jfloat>,           // CallFloatMethod
2591   _Jv_JNI_CallMethodV<jfloat>,          // CallFloatMethodV
2592   _Jv_JNI_CallMethodA<jfloat>,          // CallFloatMethodA
2593   _Jv_JNI_CallMethod<jdouble>,          // CallDoubleMethod
2594   _Jv_JNI_CallMethodV<jdouble>,         // CallDoubleMethodV
2595   _Jv_JNI_CallMethodA<jdouble>,         // CallDoubleMethodA
2596   _Jv_JNI_CallVoidMethod,               // CallVoidMethod
2597   _Jv_JNI_CallVoidMethodV,              // CallVoidMethodV
2598   _Jv_JNI_CallVoidMethodA,              // CallVoidMethodA
2599
2600   // Nonvirtual method invocation functions follow.
2601   _Jv_JNI_CallAnyMethod<jobject, nonvirtual>,   // CallNonvirtualObjectMethod
2602   _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>,  // CallNonvirtualObjectMethodV
2603   _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>,  // CallNonvirtualObjectMethodA
2604   _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>,  // CallNonvirtualBooleanMethod
2605   _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2606   _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2607   _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>,     // CallNonvirtualByteMethod
2608   _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>,    // CallNonvirtualByteMethodV
2609   _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>,    // CallNonvirtualByteMethodA
2610   _Jv_JNI_CallAnyMethod<jchar, nonvirtual>,     // CallNonvirtualCharMethod
2611   _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>,    // CallNonvirtualCharMethodV
2612   _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>,    // CallNonvirtualCharMethodA
2613   _Jv_JNI_CallAnyMethod<jshort, nonvirtual>,    // CallNonvirtualShortMethod
2614   _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>,   // CallNonvirtualShortMethodV
2615   _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>,   // CallNonvirtualShortMethodA
2616   _Jv_JNI_CallAnyMethod<jint, nonvirtual>,      // CallNonvirtualIntMethod
2617   _Jv_JNI_CallAnyMethodV<jint, nonvirtual>,     // CallNonvirtualIntMethodV
2618   _Jv_JNI_CallAnyMethodA<jint, nonvirtual>,     // CallNonvirtualIntMethodA
2619   _Jv_JNI_CallAnyMethod<jlong, nonvirtual>,     // CallNonvirtualLongMethod
2620   _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>,    // CallNonvirtualLongMethodV
2621   _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>,    // CallNonvirtualLongMethodA
2622   _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>,    // CallNonvirtualFloatMethod
2623   _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodV
2624   _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodA
2625   _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>,   // CallNonvirtualDoubleMethod
2626   _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodV
2627   _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodA
2628   _Jv_JNI_CallAnyVoidMethod<nonvirtual>,        // CallNonvirtualVoidMethod
2629   _Jv_JNI_CallAnyVoidMethodV<nonvirtual>,       // CallNonvirtualVoidMethodV
2630   _Jv_JNI_CallAnyVoidMethodA<nonvirtual>,       // CallNonvirtualVoidMethodA
2631
2632   _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2633   _Jv_JNI_GetField<jobject>,    // GetObjectField
2634   _Jv_JNI_GetField<jboolean>,   // GetBooleanField
2635   _Jv_JNI_GetField<jbyte>,      // GetByteField
2636   _Jv_JNI_GetField<jchar>,      // GetCharField
2637   _Jv_JNI_GetField<jshort>,     // GetShortField
2638   _Jv_JNI_GetField<jint>,       // GetIntField
2639   _Jv_JNI_GetField<jlong>,      // GetLongField
2640   _Jv_JNI_GetField<jfloat>,     // GetFloatField
2641   _Jv_JNI_GetField<jdouble>,    // GetDoubleField
2642   _Jv_JNI_SetField,             // SetObjectField
2643   _Jv_JNI_SetField,             // SetBooleanField
2644   _Jv_JNI_SetField,             // SetByteField
2645   _Jv_JNI_SetField,             // SetCharField
2646   _Jv_JNI_SetField,             // SetShortField
2647   _Jv_JNI_SetField,             // SetIntField
2648   _Jv_JNI_SetField,             // SetLongField
2649   _Jv_JNI_SetField,             // SetFloatField
2650   _Jv_JNI_SetField,             // SetDoubleField
2651   _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2652
2653   _Jv_JNI_CallStaticMethod<jobject>,      // CallStaticObjectMethod
2654   _Jv_JNI_CallStaticMethodV<jobject>,     // CallStaticObjectMethodV
2655   _Jv_JNI_CallStaticMethodA<jobject>,     // CallStaticObjectMethodA
2656   _Jv_JNI_CallStaticMethod<jboolean>,     // CallStaticBooleanMethod
2657   _Jv_JNI_CallStaticMethodV<jboolean>,    // CallStaticBooleanMethodV
2658   _Jv_JNI_CallStaticMethodA<jboolean>,    // CallStaticBooleanMethodA
2659   _Jv_JNI_CallStaticMethod<jbyte>,        // CallStaticByteMethod
2660   _Jv_JNI_CallStaticMethodV<jbyte>,       // CallStaticByteMethodV
2661   _Jv_JNI_CallStaticMethodA<jbyte>,       // CallStaticByteMethodA
2662   _Jv_JNI_CallStaticMethod<jchar>,        // CallStaticCharMethod
2663   _Jv_JNI_CallStaticMethodV<jchar>,       // CallStaticCharMethodV
2664   _Jv_JNI_CallStaticMethodA<jchar>,       // CallStaticCharMethodA
2665   _Jv_JNI_CallStaticMethod<jshort>,       // CallStaticShortMethod
2666   _Jv_JNI_CallStaticMethodV<jshort>,      // CallStaticShortMethodV
2667   _Jv_JNI_CallStaticMethodA<jshort>,      // CallStaticShortMethodA
2668   _Jv_JNI_CallStaticMethod<jint>,         // CallStaticIntMethod
2669   _Jv_JNI_CallStaticMethodV<jint>,        // CallStaticIntMethodV
2670   _Jv_JNI_CallStaticMethodA<jint>,        // CallStaticIntMethodA
2671   _Jv_JNI_CallStaticMethod<jlong>,        // CallStaticLongMethod
2672   _Jv_JNI_CallStaticMethodV<jlong>,       // CallStaticLongMethodV
2673   _Jv_JNI_CallStaticMethodA<jlong>,       // CallStaticLongMethodA
2674   _Jv_JNI_CallStaticMethod<jfloat>,       // CallStaticFloatMethod
2675   _Jv_JNI_CallStaticMethodV<jfloat>,      // CallStaticFloatMethodV
2676   _Jv_JNI_CallStaticMethodA<jfloat>,      // CallStaticFloatMethodA
2677   _Jv_JNI_CallStaticMethod<jdouble>,      // CallStaticDoubleMethod
2678   _Jv_JNI_CallStaticMethodV<jdouble>,     // CallStaticDoubleMethodV
2679   _Jv_JNI_CallStaticMethodA<jdouble>,     // CallStaticDoubleMethodA
2680   _Jv_JNI_CallStaticVoidMethod,           // CallStaticVoidMethod
2681   _Jv_JNI_CallStaticVoidMethodV,          // CallStaticVoidMethodV
2682   _Jv_JNI_CallStaticVoidMethodA,          // CallStaticVoidMethodA
2683
2684   _Jv_JNI_GetAnyFieldID<true>,         // GetStaticFieldID
2685   _Jv_JNI_GetStaticField<jobject>,     // GetStaticObjectField
2686   _Jv_JNI_GetStaticField<jboolean>,    // GetStaticBooleanField
2687   _Jv_JNI_GetStaticField<jbyte>,       // GetStaticByteField
2688   _Jv_JNI_GetStaticField<jchar>,       // GetStaticCharField
2689   _Jv_JNI_GetStaticField<jshort>,      // GetStaticShortField
2690   _Jv_JNI_GetStaticField<jint>,        // GetStaticIntField
2691   _Jv_JNI_GetStaticField<jlong>,       // GetStaticLongField
2692   _Jv_JNI_GetStaticField<jfloat>,      // GetStaticFloatField
2693   _Jv_JNI_GetStaticField<jdouble>,     // GetStaticDoubleField
2694   _Jv_JNI_SetStaticField,              // SetStaticObjectField
2695   _Jv_JNI_SetStaticField,              // SetStaticBooleanField
2696   _Jv_JNI_SetStaticField,              // SetStaticByteField
2697   _Jv_JNI_SetStaticField,              // SetStaticCharField
2698   _Jv_JNI_SetStaticField,              // SetStaticShortField
2699   _Jv_JNI_SetStaticField,              // SetStaticIntField
2700   _Jv_JNI_SetStaticField,              // SetStaticLongField
2701   _Jv_JNI_SetStaticField,              // SetStaticFloatField
2702   _Jv_JNI_SetStaticField,              // SetStaticDoubleField
2703   _Jv_JNI_NewString,                   // NewString
2704   _Jv_JNI_GetStringLength,             // GetStringLength
2705   _Jv_JNI_GetStringChars,              // GetStringChars
2706   _Jv_JNI_ReleaseStringChars,          // ReleaseStringChars
2707   _Jv_JNI_NewStringUTF,                // NewStringUTF
2708   _Jv_JNI_GetStringUTFLength,          // GetStringUTFLength
2709   _Jv_JNI_GetStringUTFChars,           // GetStringUTFChars
2710   _Jv_JNI_ReleaseStringUTFChars,       // ReleaseStringUTFChars
2711   _Jv_JNI_GetArrayLength,              // GetArrayLength
2712   _Jv_JNI_NewObjectArray,              // NewObjectArray
2713   _Jv_JNI_GetObjectArrayElement,       // GetObjectArrayElement
2714   _Jv_JNI_SetObjectArrayElement,       // SetObjectArrayElement
2715   _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2716                                                             // NewBooleanArray
2717   _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>,     // NewByteArray
2718   _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>,     // NewCharArray
2719   _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>,   // NewShortArray
2720   _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>,       // NewIntArray
2721   _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>,     // NewLongArray
2722   _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>,   // NewFloatArray
2723   _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2724   _Jv_JNI_GetPrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2725                                             // GetBooleanArrayElements
2726   _Jv_JNI_GetPrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2727                                             // GetByteArrayElements
2728   _Jv_JNI_GetPrimitiveArrayElements<jchar, JvPrimClass (char)>,
2729                                             // GetCharArrayElements
2730   _Jv_JNI_GetPrimitiveArrayElements<jshort, JvPrimClass (short)>,
2731                                             // GetShortArrayElements
2732   _Jv_JNI_GetPrimitiveArrayElements<jint, JvPrimClass (int)>,
2733                                             // GetIntArrayElements
2734   _Jv_JNI_GetPrimitiveArrayElements<jlong, JvPrimClass (long)>,
2735                                             // GetLongArrayElements
2736   _Jv_JNI_GetPrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2737                                             // GetFloatArrayElements
2738   _Jv_JNI_GetPrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2739                                             // GetDoubleArrayElements
2740   _Jv_JNI_ReleasePrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2741                                             // ReleaseBooleanArrayElements
2742   _Jv_JNI_ReleasePrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2743                                             // ReleaseByteArrayElements
2744   _Jv_JNI_ReleasePrimitiveArrayElements<jchar, JvPrimClass (char)>,
2745                                             // ReleaseCharArrayElements
2746   _Jv_JNI_ReleasePrimitiveArrayElements<jshort, JvPrimClass (short)>,
2747                                             // ReleaseShortArrayElements
2748   _Jv_JNI_ReleasePrimitiveArrayElements<jint, JvPrimClass (int)>,
2749                                             // ReleaseIntArrayElements
2750   _Jv_JNI_ReleasePrimitiveArrayElements<jlong, JvPrimClass (long)>,
2751                                             // ReleaseLongArrayElements
2752   _Jv_JNI_ReleasePrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2753                                             // ReleaseFloatArrayElements
2754   _Jv_JNI_ReleasePrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2755                                             // ReleaseDoubleArrayElements
2756   _Jv_JNI_GetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2757                                             // GetBooleanArrayRegion
2758   _Jv_JNI_GetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2759                                             // GetByteArrayRegion
2760   _Jv_JNI_GetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2761                                             // GetCharArrayRegion
2762   _Jv_JNI_GetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2763                                             // GetShortArrayRegion
2764   _Jv_JNI_GetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2765                                             // GetIntArrayRegion
2766   _Jv_JNI_GetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2767                                             // GetLongArrayRegion
2768   _Jv_JNI_GetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2769                                             // GetFloatArrayRegion
2770   _Jv_JNI_GetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2771                                             // GetDoubleArrayRegion
2772   _Jv_JNI_SetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2773                                             // SetBooleanArrayRegion
2774   _Jv_JNI_SetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2775                                             // SetByteArrayRegion
2776   _Jv_JNI_SetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2777                                             // SetCharArrayRegion
2778   _Jv_JNI_SetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2779                                             // SetShortArrayRegion
2780   _Jv_JNI_SetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2781                                             // SetIntArrayRegion
2782   _Jv_JNI_SetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2783                                             // SetLongArrayRegion
2784   _Jv_JNI_SetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2785                                             // SetFloatArrayRegion
2786   _Jv_JNI_SetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2787                                             // SetDoubleArrayRegion
2788   _Jv_JNI_RegisterNatives,                  // RegisterNatives
2789   _Jv_JNI_UnregisterNatives,                // UnregisterNatives
2790   _Jv_JNI_MonitorEnter,                     // MonitorEnter
2791   _Jv_JNI_MonitorExit,                      // MonitorExit
2792   _Jv_JNI_GetJavaVM,                        // GetJavaVM
2793
2794   _Jv_JNI_GetStringRegion,                  // GetStringRegion
2795   _Jv_JNI_GetStringUTFRegion,               // GetStringUTFRegion
2796   _Jv_JNI_GetPrimitiveArrayCritical,        // GetPrimitiveArrayCritical
2797   _Jv_JNI_ReleasePrimitiveArrayCritical,    // ReleasePrimitiveArrayCritical
2798   _Jv_JNI_GetStringCritical,                // GetStringCritical
2799   _Jv_JNI_ReleaseStringCritical,            // ReleaseStringCritical
2800
2801   _Jv_JNI_NewWeakGlobalRef,                 // NewWeakGlobalRef
2802   _Jv_JNI_DeleteWeakGlobalRef,              // DeleteWeakGlobalRef
2803
2804   _Jv_JNI_ExceptionCheck,                   // ExceptionCheck
2805
2806   _Jv_JNI_NewDirectByteBuffer,              // NewDirectByteBuffer
2807   _Jv_JNI_GetDirectBufferAddress,           // GetDirectBufferAddress
2808   _Jv_JNI_GetDirectBufferCapacity           // GetDirectBufferCapacity
2809 };
2810
2811 struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
2812 {
2813   RESERVED,
2814   RESERVED,
2815   RESERVED,
2816
2817   _Jv_JNI_DestroyJavaVM,
2818   _Jv_JNI_AttachCurrentThread,
2819   _Jv_JNI_DetachCurrentThread,
2820   _Jv_JNI_GetEnv,
2821   _Jv_JNI_AttachCurrentThreadAsDaemon
2822 };