libjava/jni.cc

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