libjava/jni.cc

   1 // jni.cc - JNI implementation, including the jump table.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
   4    Free Software Foundation
   5
   6    This file is part of libgcj.
   7
   8 This software is copyrighted work licensed under the terms of the
   9 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
  10 details.  */
  11
  12 #include <config.h>
  13
  14 #include <stdio.h>
  15 #include <stddef.h>
  16 #include <string.h>
  17
  18 #include <gcj/cni.h>
  19 #include <jvm.h>
  20 #include <java-assert.h>
  21 #include <jni.h>
  22 #ifdef ENABLE_JVMPI
  23 #include <jvmpi.h>
  24 #endif
  25
  26 #include <java/lang/Class.h>
  27 #include <java/lang/ClassLoader.h>
  28 #include <java/lang/Throwable.h>
  29 #include <java/lang/ArrayIndexOutOfBoundsException.h>
  30 #include <java/lang/StringIndexOutOfBoundsException.h>
  31 #include <java/lang/StringBuffer.h>
  32 #include <java/lang/UnsatisfiedLinkError.h>
  33 #include <java/lang/InstantiationException.h>
  34 #include <java/lang/NoSuchFieldError.h>
  35 #include <java/lang/NoSuchMethodError.h>
  36 #include <java/lang/reflect/Constructor.h>
  37 #include <java/lang/reflect/Method.h>
  38 #include <java/lang/reflect/Modifier.h>
  39 #include <java/lang/OutOfMemoryError.h>
  40 #include <java/lang/Integer.h>
  41 #include <java/lang/ThreadGroup.h>
  42 #include <java/lang/Thread.h>
  43 #include <java/lang/IllegalAccessError.h>
  44 #include <java/nio/Buffer.h>
  45 #include <java/nio/DirectByteBufferImpl.h>
  46 #include <java/nio/DirectByteBufferImpl$ReadWrite.h>
  47 #include <java/util/IdentityHashMap.h>
  48 #include <gnu/gcj/RawData.h>
  49 #include <java/lang/ClassNotFoundException.h>
  50
  51 #include <gcj/method.h>
  52 #include <gcj/field.h>
  53
  54 #include <java-interp.h>
  55 #include <java-threads.h>
  56
  57 using namespace gcj;
  58
  59 // This enum is used to select different template instantiations in
  60 // the invocation code.
  61 enum invocation_type
  62 {
  63   normal,
  64   nonvirtual,
  65   static_type,
  66   constructor
  67 };
  68
  69 // Forward declarations.
  70 extern struct JNINativeInterface _Jv_JNIFunctions;
  71 extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
  72
  73 // Number of slots in the default frame.  The VM must allow at least
  74 // 16.
  75 #define FRAME_SIZE 16
  76
  77 // Mark value indicating this is an overflow frame.
  78 #define MARK_NONE    0
  79 // Mark value indicating this is a user frame.
  80 #define MARK_USER    1
  81 // Mark value indicating this is a system frame.
  82 #define MARK_SYSTEM  2
  83
  84 // This structure is used to keep track of local references.
  85 struct _Jv_JNI_LocalFrame
  86 {
  87   // This is true if this frame object represents a pushed frame (eg
  88   // from PushLocalFrame).
  89   int marker;
  90
  91   // Flag to indicate some locals were allocated.
  92   int allocated_p;
  93
  94   // Number of elements in frame.
  95   int size;
  96
  97   // Next frame in chain.
  98   _Jv_JNI_LocalFrame *next;
  99
 100   // The elements.  These are allocated using the C "struct hack".
 101   jobject vec[0];
 102 };
 103
 104 // This holds a reference count for all local references.
 105 static java::util::IdentityHashMap *local_ref_table;
 106 // This holds a reference count for all global references.
 107 static java::util::IdentityHashMap *global_ref_table;
 108
 109 // The only VM.
 110 static JavaVM *the_vm;
 111
 112 #ifdef ENABLE_JVMPI
 113 // The only JVMPI interface description.
 114 static JVMPI_Interface _Jv_JVMPI_Interface;
 115
 116 static jint
 117 jvmpiEnableEvent (jint event_type, void *)
 118 {
 119   switch (event_type)
 120     {
 121     case JVMPI_EVENT_OBJECT_ALLOC:
 122       _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
 123       break;
 124
 125     case JVMPI_EVENT_THREAD_START:
 126       _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
 127       break;
 128
 129     case JVMPI_EVENT_THREAD_END:
 130       _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
 131       break;
 132
 133     default:
 134       return JVMPI_NOT_AVAILABLE;
 135     }
 136
 137   return JVMPI_SUCCESS;
 138 }
 139
 140 static jint
 141 jvmpiDisableEvent (jint event_type, void *)
 142 {
 143   switch (event_type)
 144     {
 145     case JVMPI_EVENT_OBJECT_ALLOC:
 146       _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
 147       break;
 148
 149     default:
 150       return JVMPI_NOT_AVAILABLE;
 151     }
 152
 153   return JVMPI_SUCCESS;
 154 }
 155 #endif
 156
 157 \f
 158
 159 void
 160 _Jv_JNI_Init (void)
 161 {
 162   local_ref_table = new java::util::IdentityHashMap;
 163   global_ref_table = new java::util::IdentityHashMap;
 164
 165 #ifdef ENABLE_JVMPI
 166   _Jv_JVMPI_Interface.version = 1;
 167   _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
 168   _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
 169   _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
 170   _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
 171   _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
 172 #endif
 173 }
 174
 175 // Tell the GC that a certain pointer is live.
 176 static void
 177 mark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
 178 {
 179   JvSynchronize sync (ref_table);
 180
 181   using namespace java::lang;
 182   Integer *refcount = (Integer *) ref_table->get (obj);
 183   jint val = (refcount == NULL) ? 0 : refcount->intValue ();
 184   // FIXME: what about out of memory error?
 185   ref_table->put (obj, new Integer (val + 1));
 186 }
 187
 188 // Unmark a pointer.
 189 static void
 190 unmark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
 191 {
 192   JvSynchronize sync (ref_table);
 193
 194   using namespace java::lang;
 195   Integer *refcount = (Integer *) ref_table->get (obj);
 196   JvAssert (refcount);
 197   jint val = refcount->intValue () - 1;
 198   JvAssert (val >= 0);
 199   if (val == 0)
 200     ref_table->remove (obj);
 201   else
 202     // FIXME: what about out of memory error?
 203     ref_table->put (obj, new Integer (val));
 204 }
 205
 206 // "Unwrap" some random non-reference type.  This exists to simplify
 207 // other template functions.
 208 template<typename T>
 209 static T
 210 unwrap (T val)
 211 {
 212   return val;
 213 }
 214
 215 // Unwrap a weak reference, if required.
 216 template<typename T>
 217 static T *
 218 unwrap (T *obj)
 219 {
 220   using namespace gnu::gcj::runtime;
 221   // We can compare the class directly because JNIWeakRef is `final'.
 222   // Doing it this way is much faster.
 223   if (obj == NULL || obj->getClass () != &JNIWeakRef::class$)
 224     return obj;
 225   JNIWeakRef *wr = reinterpret_cast<JNIWeakRef *> (obj);
 226   return reinterpret_cast<T *> (wr->get ());
 227 }
 228
 229 jobject
 230 _Jv_UnwrapJNIweakReference (jobject obj)
 231 {
 232   return unwrap (obj);
 233 }
 234
 235 \f
 236
 237 static jobject JNICALL
 238 _Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
 239 {
 240   // This seems weird but I think it is correct.
 241   obj = unwrap (obj);
 242   mark_for_gc (obj, global_ref_table);
 243   return obj;
 244 }
 245
 246 static void JNICALL
 247 _Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
 248 {
 249   // This seems weird but I think it is correct.
 250   obj = unwrap (obj);
 251   unmark_for_gc (obj, global_ref_table);
 252 }
 253
 254 static void JNICALL
 255 _Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
 256 {
 257   _Jv_JNI_LocalFrame *frame;
 258
 259   // This seems weird but I think it is correct.
 260   obj = unwrap (obj);
 261
 262   for (frame = env->locals; frame != NULL; frame = frame->next)
 263     {
 264       for (int i = 0; i < frame->size; ++i)
 265         {
 266           if (frame->vec[i] == obj)
 267             {
 268               frame->vec[i] = NULL;
 269               unmark_for_gc (obj, local_ref_table);
 270               return;
 271             }
 272         }
 273
 274       // Don't go past a marked frame.
 275       JvAssert (frame->marker == MARK_NONE);
 276     }
 277
 278   JvAssert (0);
 279 }
 280
 281 static jint JNICALL
 282 _Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
 283 {
 284   // It is easier to just always allocate a new frame of the requested
 285   // size.  This isn't the most efficient thing, but for now we don't
 286   // care.  Note that _Jv_JNI_PushLocalFrame relies on this right now.
 287
 288   _Jv_JNI_LocalFrame *frame;
 289   try
 290     {
 291       frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
 292                                                  + size * sizeof (jobject));
 293     }
 294   catch (jthrowable t)
 295     {
 296       env->ex = t;
 297       return JNI_ERR;
 298     }
 299
 300   frame->marker = MARK_NONE;
 301   frame->size = size;
 302   frame->allocated_p = 0;
 303   memset (&frame->vec[0], 0, size * sizeof (jobject));
 304   frame->next = env->locals;
 305   env->locals = frame;
 306
 307   return 0;
 308 }
 309
 310 static jint JNICALL
 311 _Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
 312 {
 313   jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
 314   if (r < 0)
 315     return r;
 316
 317   // The new frame is on top.
 318   env->locals->marker = MARK_USER;
 319
 320   return 0;
 321 }
 322
 323 static jobject JNICALL
 324 _Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
 325 {
 326   // This seems weird but I think it is correct.
 327   obj = unwrap (obj);
 328
 329   // Try to find an open slot somewhere in the topmost frame.
 330   _Jv_JNI_LocalFrame *frame = env->locals;
 331   bool done = false, set = false;
 332   for (; frame != NULL && ! done; frame = frame->next)
 333     {
 334       for (int i = 0; i < frame->size; ++i)
 335         {
 336           if (frame->vec[i] == NULL)
 337             {
 338               set = true;
 339               done = true;
 340               frame->vec[i] = obj;
 341               frame->allocated_p = 1;
 342               break;
 343             }
 344         }
 345
 346       // If we found a slot, or if the frame we just searched is the
 347       // mark frame, then we are done.
 348       if (done || frame == NULL || frame->marker != MARK_NONE)
 349         break;
 350     }
 351
 352   if (! set)
 353     {
 354       // No slots, so we allocate a new frame.  According to the spec
 355       // we could just die here.  FIXME: return value.
 356       _Jv_JNI_EnsureLocalCapacity (env, 16);
 357       // We know the first element of the new frame will be ok.
 358       env->locals->vec[0] = obj;
 359       env->locals->allocated_p = 1;
 360     }
 361
 362   mark_for_gc (obj, local_ref_table);
 363   return obj;
 364 }
 365
 366 static jobject JNICALL
 367 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result, int stop)
 368 {
 369   _Jv_JNI_LocalFrame *rf = env->locals;
 370
 371   bool done = false;
 372   while (rf != NULL && ! done)
 373     {
 374       for (int i = 0; i < rf->size; ++i)
 375         if (rf->vec[i] != NULL)
 376           unmark_for_gc (rf->vec[i], local_ref_table);
 377
 378       // If the frame we just freed is the marker frame, we are done.
 379       done = (rf->marker == stop);
 380
 381       _Jv_JNI_LocalFrame *n = rf->next;
 382       // When N==NULL, we've reached the reusable bottom_locals, and we must
 383       // not free it.  However, we must be sure to clear all its elements.
 384       if (n == NULL)
 385         {
 386           if (rf->allocated_p)
 387             memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
 388           rf->allocated_p = 0;
 389           rf = NULL;
 390           break;
 391         }
 392
 393       _Jv_Free (rf);
 394       rf = n;
 395     }
 396
 397   // Update the local frame information.
 398   env->locals = rf;
 399
 400   return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
 401 }
 402
 403 static jobject JNICALL
 404 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
 405 {
 406   return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
 407 }
 408
 409 // Make sure an array's type is compatible with the type of the
 410 // destination.
 411 template<typename T>
 412 static bool
 413 _Jv_JNI_check_types (JNIEnv *env, JArray<T> *array, jclass K)
 414 {
 415   jclass klass = array->getClass()->getComponentType();
 416   if (__builtin_expect (klass != K, false))
 417     {
 418       env->ex = new java::lang::IllegalAccessError ();
 419       return false;
 420     }
 421   else
 422     return true;
 423 }
 424
 425 // Pop a `system' frame from the stack.  This is `extern "C"' as it is
 426 // used by the compiler.
 427 extern "C" void
 428 _Jv_JNI_PopSystemFrame (JNIEnv *env)
 429 {
 430   // Only enter slow path when we're not at the bottom, or there have been
 431   // allocations. Usually this is false and we can just null out the locals
 432   // field.
 433
 434   if (__builtin_expect ((env->locals->next
 435                          || env->locals->allocated_p), false))
 436     _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
 437   else
 438     env->locals = NULL;
 439
 440   if (__builtin_expect (env->ex != NULL, false))
 441     {
 442       jthrowable t = env->ex;
 443       env->ex = NULL;
 444       throw t;
 445     }
 446 }
 447
 448 template<typename T> T extract_from_jvalue(jvalue const & t);
 449 template<> jboolean extract_from_jvalue(jvalue const & jv) { return jv.z; }
 450 template<> jbyte    extract_from_jvalue(jvalue const & jv) { return jv.b; }
 451 template<> jchar    extract_from_jvalue(jvalue const & jv) { return jv.c; }
 452 template<> jshort   extract_from_jvalue(jvalue const & jv) { return jv.s; }
 453 template<> jint     extract_from_jvalue(jvalue const & jv) { return jv.i; }
 454 template<> jlong    extract_from_jvalue(jvalue const & jv) { return jv.j; }
 455 template<> jfloat   extract_from_jvalue(jvalue const & jv) { return jv.f; }
 456 template<> jdouble  extract_from_jvalue(jvalue const & jv) { return jv.d; }
 457 template<> jobject  extract_from_jvalue(jvalue const & jv) { return jv.l; }
 458
 459
 460 // This function is used from other template functions.  It wraps the
 461 // return value appropriately; we specialize it so that object returns
 462 // are turned into local references.
 463 template<typename T>
 464 static T
 465 wrap_value (JNIEnv *, T value)
 466 {
 467   return value;
 468 }
 469
 470 // This specialization is used for jobject, jclass, jstring, jarray,
 471 // etc.
 472 template<typename R, typename T>
 473 static T *
 474 wrap_value (JNIEnv *env, T *value)
 475 {
 476   return (value == NULL
 477           ? value
 478           : (T *) _Jv_JNI_NewLocalRef (env, (jobject) value));
 479 }
 480
 481 \f
 482
 483 static jint JNICALL
 484 _Jv_JNI_GetVersion (JNIEnv *)
 485 {
 486   return JNI_VERSION_1_4;
 487 }
 488
 489 static jclass JNICALL
 490 _Jv_JNI_DefineClass (JNIEnv *env, const char *name, jobject loader,
 491                      const jbyte *buf, jsize bufLen)
 492 {
 493   try
 494     {
 495       loader = unwrap (loader);
 496
 497       jstring sname = JvNewStringUTF (name);
 498       jbyteArray bytes = JvNewByteArray (bufLen);
 499
 500       jbyte *elts = elements (bytes);
 501       memcpy (elts, buf, bufLen * sizeof (jbyte));
 502
 503       java::lang::ClassLoader *l
 504         = reinterpret_cast<java::lang::ClassLoader *> (loader);
 505
 506       jclass result = l->defineClass (sname, bytes, 0, bufLen);
 507       return (jclass) wrap_value (env, result);
 508     }
 509   catch (jthrowable t)
 510     {
 511       env->ex = t;
 512       return NULL;
 513     }
 514 }
 515
 516 static jclass JNICALL
 517 _Jv_JNI_FindClass (JNIEnv *env, const char *name)
 518 {
 519   // FIXME: assume that NAME isn't too long.
 520   int len = strlen (name);
 521   char s[len + 1];
 522   for (int i = 0; i <= len; ++i)
 523     s[i] = (name[i] == '/') ? '.' : name[i];
 524
 525   jclass r = NULL;
 526   try
 527     {
 528       // This might throw an out of memory exception.
 529       jstring n = JvNewStringUTF (s);
 530
 531       java::lang::ClassLoader *loader = NULL;
 532       if (env->klass != NULL)
 533         loader = env->klass->getClassLoaderInternal ();
 534
 535       if (loader == NULL)
 536         {
 537           // FIXME: should use getBaseClassLoader, but we don't have that
 538           // yet.
 539           loader = java::lang::ClassLoader::getSystemClassLoader ();
 540         }
 541
 542       r = loader->loadClass (n);
 543     }
 544   catch (jthrowable t)
 545     {
 546       env->ex = t;
 547     }
 548
 549   return (jclass) wrap_value (env, r);
 550 }
 551
 552 static jclass JNICALL
 553 _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
 554 {
 555   return (jclass) wrap_value (env, unwrap (clazz)->getSuperclass ());
 556 }
 557
 558 static jboolean JNICALL
 559 _Jv_JNI_IsAssignableFrom (JNIEnv *, jclass clazz1, jclass clazz2)
 560 {
 561   return unwrap (clazz2)->isAssignableFrom (unwrap (clazz1));
 562 }
 563
 564 static jint JNICALL
 565 _Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
 566 {
 567   // We check in case the user did some funky cast.
 568   obj = unwrap (obj);
 569   JvAssert (obj != NULL && java::lang::Throwable::class$.isInstance (obj));
 570   env->ex = obj;
 571   return 0;
 572 }
 573
 574 static jint JNICALL
 575 _Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
 576 {
 577   using namespace java::lang::reflect;
 578
 579   clazz = unwrap (clazz);
 580   JvAssert (java::lang::Throwable::class$.isAssignableFrom (clazz));
 581
 582   int r = JNI_OK;
 583   try
 584     {
 585       JArray<jclass> *argtypes
 586         = (JArray<jclass> *) JvNewObjectArray (1, &java::lang::Class::class$,
 587                                                NULL);
 588
 589       jclass *elts = elements (argtypes);
 590       elts[0] = &java::lang::String::class$;
 591
 592       Constructor *cons = clazz->getConstructor (argtypes);
 593
 594       jobjectArray values = JvNewObjectArray (1, &java::lang::String::class$,
 595                                               NULL);
 596       jobject *velts = elements (values);
 597       velts[0] = JvNewStringUTF (message);
 598
 599       jobject obj = cons->newInstance (values);
 600
 601       env->ex = reinterpret_cast<jthrowable> (obj);
 602     }
 603   catch (jthrowable t)
 604     {
 605       env->ex = t;
 606       r = JNI_ERR;
 607     }
 608
 609   return r;
 610 }
 611
 612 static jthrowable JNICALL
 613 _Jv_JNI_ExceptionOccurred (JNIEnv *env)
 614 {
 615   return (jthrowable) wrap_value (env, env->ex);
 616 }
 617
 618 static void JNICALL
 619 _Jv_JNI_ExceptionDescribe (JNIEnv *env)
 620 {
 621   if (env->ex != NULL)
 622     env->ex->printStackTrace();
 623 }
 624
 625 static void JNICALL
 626 _Jv_JNI_ExceptionClear (JNIEnv *env)
 627 {
 628   env->ex = NULL;
 629 }
 630
 631 static jboolean JNICALL
 632 _Jv_JNI_ExceptionCheck (JNIEnv *env)
 633 {
 634   return env->ex != NULL;
 635 }
 636
 637 static void JNICALL
 638 _Jv_JNI_FatalError (JNIEnv *, const char *message)
 639 {
 640   JvFail (message);
 641 }
 642
 643 \f
 644
 645 static jboolean JNICALL
 646 _Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
 647 {
 648   return unwrap (obj1) == unwrap (obj2);
 649 }
 650
 651 static jobject JNICALL
 652 _Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
 653 {
 654   jobject obj = NULL;
 655   using namespace java::lang::reflect;
 656
 657   try
 658     {
 659       clazz = unwrap (clazz);
 660       JvAssert (clazz && ! clazz->isArray ());
 661       if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
 662         env->ex = new java::lang::InstantiationException ();
 663       else
 664         obj = _Jv_AllocObject (clazz);
 665     }
 666   catch (jthrowable t)
 667     {
 668       env->ex = t;
 669     }
 670
 671   return wrap_value (env, obj);
 672 }
 673
 674 static jclass JNICALL
 675 _Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
 676 {
 677   obj = unwrap (obj);
 678   JvAssert (obj);
 679   return (jclass) wrap_value (env, obj->getClass());
 680 }
 681
 682 static jboolean JNICALL
 683 _Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
 684 {
 685   return unwrap (clazz)->isInstance(unwrap (obj));
 686 }
 687
 688 \f
 689
 690 //
 691 // This section concerns method invocation.
 692 //
 693
 694 template<jboolean is_static>
 695 static jmethodID JNICALL
 696 _Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
 697                         const char *name, const char *sig)
 698 {
 699   try
 700     {
 701       clazz = unwrap (clazz);
 702       _Jv_InitClass (clazz);
 703
 704       _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
 705
 706       // FIXME: assume that SIG isn't too long.
 707       int len = strlen (sig);
 708       char s[len + 1];
 709       for (int i = 0; i <= len; ++i)
 710         s[i] = (sig[i] == '/') ? '.' : sig[i];
 711       _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
 712
 713       JvAssert (! clazz->isPrimitive());
 714
 715       using namespace java::lang::reflect;
 716
 717       while (clazz != NULL)
 718         {
 719           jint count = JvNumMethods (clazz);
 720           jmethodID meth = JvGetFirstMethod (clazz);
 721
 722           for (jint i = 0; i < count; ++i)
 723             {
 724               if (((is_static && Modifier::isStatic (meth->accflags))
 725                    || (! is_static && ! Modifier::isStatic (meth->accflags)))
 726                   && _Jv_equalUtf8Consts (meth->name, name_u)
 727                   && _Jv_equalUtf8Consts (meth->signature, sig_u))
 728                 return meth;
 729
 730               meth = meth->getNextMethod();
 731             }
 732
 733           clazz = clazz->getSuperclass ();
 734         }
 735
 736       java::lang::StringBuffer *name_sig =
 737         new java::lang::StringBuffer (JvNewStringUTF (name));
 738       name_sig->append ((jchar) ' ')->append (JvNewStringUTF (s));
 739       env->ex = new java::lang::NoSuchMethodError (name_sig->toString ());
 740     }
 741   catch (jthrowable t)
 742     {
 743       env->ex = t;
 744     }
 745
 746   return NULL;
 747 }
 748
 749 // This is a helper function which turns a va_list into an array of
 750 // `jvalue's.  It needs signature information in order to do its work.
 751 // The array of values must already be allocated.
 752 static void
 753 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
 754 {
 755   jclass *arg_elts = elements (arg_types);
 756   for (int i = 0; i < arg_types->length; ++i)
 757     {
 758       // Here we assume that sizeof(int) >= sizeof(jint), because we
 759       // use `int' when decoding the varargs.  Likewise for
 760       // float, and double.  Also we assume that sizeof(jlong) >=
 761       // sizeof(int), i.e. that jlong values are not further
 762       // promoted.
 763       JvAssert (sizeof (int) >= sizeof (jint));
 764       JvAssert (sizeof (jlong) >= sizeof (int));
 765       JvAssert (sizeof (double) >= sizeof (jfloat));
 766       JvAssert (sizeof (double) >= sizeof (jdouble));
 767       if (arg_elts[i] == JvPrimClass (byte))
 768         values[i].b = (jbyte) va_arg (vargs, int);
 769       else if (arg_elts[i] == JvPrimClass (short))
 770         values[i].s = (jshort) va_arg (vargs, int);
 771       else if (arg_elts[i] == JvPrimClass (int))
 772         values[i].i = (jint) va_arg (vargs, int);
 773       else if (arg_elts[i] == JvPrimClass (long))
 774         values[i].j = (jlong) va_arg (vargs, jlong);
 775       else if (arg_elts[i] == JvPrimClass (float))
 776         values[i].f = (jfloat) va_arg (vargs, double);
 777       else if (arg_elts[i] == JvPrimClass (double))
 778         values[i].d = (jdouble) va_arg (vargs, double);
 779       else if (arg_elts[i] == JvPrimClass (boolean))
 780         values[i].z = (jboolean) va_arg (vargs, int);
 781       else if (arg_elts[i] == JvPrimClass (char))
 782         values[i].c = (jchar) va_arg (vargs, int);
 783       else
 784         {
 785           // An object.
 786           values[i].l = unwrap (va_arg (vargs, jobject));
 787         }
 788     }
 789 }
 790
 791 // This can call any sort of method: virtual, "nonvirtual", static, or
 792 // constructor.
 793 template<typename T, invocation_type style>
 794 static T JNICALL
 795 _Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
 796                         jmethodID id, va_list vargs)
 797 {
 798   obj = unwrap (obj);
 799   klass = unwrap (klass);
 800
 801   jclass decl_class = klass ? klass : obj->getClass ();
 802   JvAssert (decl_class != NULL);
 803
 804   jclass return_type;
 805   JArray<jclass> *arg_types;
 806
 807   try
 808     {
 809       _Jv_GetTypesFromSignature (id, decl_class,
 810                                  &arg_types, &return_type);
 811
 812       jvalue args[arg_types->length];
 813       array_from_valist (args, arg_types, vargs);
 814
 815       // For constructors we need to pass the Class we are instantiating.
 816       if (style == constructor)
 817         return_type = klass;
 818
 819       jvalue result;
 820       _Jv_CallAnyMethodA (obj, return_type, id,
 821                           style == constructor,
 822                           style == normal,
 823                           arg_types, args, &result);
 824
 825       return wrap_value (env, extract_from_jvalue<T>(result));
 826     }
 827   catch (jthrowable t)
 828     {
 829       env->ex = t;
 830     }
 831
 832   return wrap_value (env, (T) 0);
 833 }
 834
 835 template<typename T, invocation_type style>
 836 static T JNICALL
 837 _Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
 838                        jmethodID method, ...)
 839 {
 840   va_list args;
 841   T result;
 842
 843   va_start (args, method);
 844   result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
 845   va_end (args);
 846
 847   return result;
 848 }
 849
 850 template<typename T, invocation_type style>
 851 static T JNICALL
 852 _Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
 853                         jmethodID id, jvalue *args)
 854 {
 855   obj = unwrap (obj);
 856   klass = unwrap (klass);
 857
 858   jclass decl_class = klass ? klass : obj->getClass ();
 859   JvAssert (decl_class != NULL);
 860
 861   jclass return_type;
 862   JArray<jclass> *arg_types;
 863   try
 864     {
 865       _Jv_GetTypesFromSignature (id, decl_class,
 866                                  &arg_types, &return_type);
 867
 868       // For constructors we need to pass the Class we are instantiating.
 869       if (style == constructor)
 870         return_type = klass;
 871
 872       // Unwrap arguments as required.  Eww.
 873       jclass *type_elts = elements (arg_types);
 874       jvalue arg_copy[arg_types->length];
 875       for (int i = 0; i < arg_types->length; ++i)
 876         {
 877           if (type_elts[i]->isPrimitive ())
 878             arg_copy[i] = args[i];
 879           else
 880             arg_copy[i].l = unwrap (args[i].l);
 881         }
 882
 883       jvalue result;
 884       _Jv_CallAnyMethodA (obj, return_type, id,
 885                           style == constructor,
 886                           style == normal,
 887                           arg_types, arg_copy, &result);
 888
 889       return wrap_value (env, extract_from_jvalue<T>(result));
 890     }
 891   catch (jthrowable t)
 892     {
 893       env->ex = t;
 894     }
 895
 896   return wrap_value (env, (T) 0);
 897 }
 898
 899 template<invocation_type style>
 900 static void JNICALL
 901 _Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
 902                             jmethodID id, va_list vargs)
 903 {
 904   obj = unwrap (obj);
 905   klass = unwrap (klass);
 906
 907   jclass decl_class = klass ? klass : obj->getClass ();
 908   JvAssert (decl_class != NULL);
 909
 910   jclass return_type;
 911   JArray<jclass> *arg_types;
 912   try
 913     {
 914       _Jv_GetTypesFromSignature (id, decl_class,
 915                                  &arg_types, &return_type);
 916
 917       jvalue args[arg_types->length];
 918       array_from_valist (args, arg_types, vargs);
 919
 920       // For constructors we need to pass the Class we are instantiating.
 921       if (style == constructor)
 922         return_type = klass;
 923
 924       _Jv_CallAnyMethodA (obj, return_type, id,
 925                           style == constructor,
 926                           style == normal,
 927                           arg_types, args, NULL);
 928     }
 929   catch (jthrowable t)
 930     {
 931       env->ex = t;
 932     }
 933 }
 934
 935 template<invocation_type style>
 936 static void JNICALL
 937 _Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
 938                            jmethodID method, ...)
 939 {
 940   va_list args;
 941
 942   va_start (args, method);
 943   _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
 944   va_end (args);
 945 }
 946
 947 template<invocation_type style>
 948 static void JNICALL
 949 _Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
 950                             jmethodID id, jvalue *args)
 951 {
 952   jclass decl_class = klass ? klass : obj->getClass ();
 953   JvAssert (decl_class != NULL);
 954
 955   jclass return_type;
 956   JArray<jclass> *arg_types;
 957   try
 958     {
 959       _Jv_GetTypesFromSignature (id, decl_class,
 960                                  &arg_types, &return_type);
 961
 962       // Unwrap arguments as required.  Eww.
 963       jclass *type_elts = elements (arg_types);
 964       jvalue arg_copy[arg_types->length];
 965       for (int i = 0; i < arg_types->length; ++i)
 966         {
 967           if (type_elts[i]->isPrimitive ())
 968             arg_copy[i] = args[i];
 969           else
 970             arg_copy[i].l = unwrap (args[i].l);
 971         }
 972
 973       _Jv_CallAnyMethodA (obj, return_type, id,
 974                           style == constructor,
 975                           style == normal,
 976                           arg_types, args, NULL);
 977     }
 978   catch (jthrowable t)
 979     {
 980       env->ex = t;
 981     }
 982 }
 983
 984 // Functions with this signature are used to implement functions in
 985 // the CallMethod family.
 986 template<typename T>
 987 static T JNICALL
 988 _Jv_JNI_CallMethodV (JNIEnv *env, jobject obj,
 989                      jmethodID id, va_list args)
 990 {
 991   return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
 992 }
 993
 994 // Functions with this signature are used to implement functions in
 995 // the CallMethod family.
 996 template<typename T>
 997 static T JNICALL
 998 _Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
 999 {
1000   va_list args;
1001   T result;
1002
1003   va_start (args, id);
1004   result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
1005   va_end (args);
1006
1007   return result;
1008 }
1009
1010 // Functions with this signature are used to implement functions in
1011 // the CallMethod family.
1012 template<typename T>
1013 static T JNICALL
1014 _Jv_JNI_CallMethodA (JNIEnv *env, jobject obj,
1015                      jmethodID id, jvalue *args)
1016 {
1017   return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
1018 }
1019
1020 static void JNICALL
1021 _Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj,
1022                          jmethodID id, va_list args)
1023 {
1024   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1025 }
1026
1027 static void JNICALL
1028 _Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
1029 {
1030   va_list args;
1031
1032   va_start (args, id);
1033   _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1034   va_end (args);
1035 }
1036
1037 static void JNICALL
1038 _Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj,
1039                          jmethodID id, jvalue *args)
1040 {
1041   _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
1042 }
1043
1044 // Functions with this signature are used to implement functions in
1045 // the CallStaticMethod family.
1046 template<typename T>
1047 static T JNICALL
1048 _Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
1049                            jmethodID id, va_list args)
1050 {
1051   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1052   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1053
1054   return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
1055 }
1056
1057 // Functions with this signature are used to implement functions in
1058 // the CallStaticMethod family.
1059 template<typename T>
1060 static T JNICALL
1061 _Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass,
1062                           jmethodID id, ...)
1063 {
1064   va_list args;
1065   T result;
1066
1067   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1068   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1069
1070   va_start (args, id);
1071   result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
1072                                                    id, args);
1073   va_end (args);
1074
1075   return result;
1076 }
1077
1078 // Functions with this signature are used to implement functions in
1079 // the CallStaticMethod family.
1080 template<typename T>
1081 static T JNICALL
1082 _Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
1083                            jvalue *args)
1084 {
1085   JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1086   JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1087
1088   return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
1089 }
1090
1091 static void JNICALL
1092 _Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass,
1093                                jmethodID id, va_list args)
1094 {
1095   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1096 }
1097
1098 static void JNICALL
1099 _Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass,
1100                               jmethodID id, ...)
1101 {
1102   va_list args;
1103
1104   va_start (args, id);
1105   _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1106   va_end (args);
1107 }
1108
1109 static void JNICALL
1110 _Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass,
1111                                jmethodID id, jvalue *args)
1112 {
1113   _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
1114 }
1115
1116 static jobject JNICALL
1117 _Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
1118                     jmethodID id, va_list args)
1119 {
1120   JvAssert (klass && ! klass->isArray ());
1121   JvAssert (! strcmp (id->name->chars(), "<init>")
1122             && id->signature->len() > 2
1123             && id->signature->chars()[0] == '('
1124             && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1125                          ")V"));
1126
1127   return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1128                                                        id, args);
1129 }
1130
1131 static jobject JNICALL
1132 _Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
1133 {
1134   JvAssert (klass && ! klass->isArray ());
1135   JvAssert (! strcmp (id->name->chars(), "<init>")
1136             && id->signature->len() > 2
1137             && id->signature->chars()[0] == '('
1138             && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1139                          ")V"));
1140
1141   va_list args;
1142   jobject result;
1143
1144   va_start (args, id);
1145   result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1146                                                          id, args);
1147   va_end (args);
1148
1149   return result;
1150 }
1151
1152 static jobject JNICALL
1153 _Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
1154                     jvalue *args)
1155 {
1156   JvAssert (klass && ! klass->isArray ());
1157   JvAssert (! strcmp (id->name->chars(), "<init>")
1158             && id->signature->len() > 2
1159             && id->signature->chars()[0] == '('
1160             && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1161                          ")V"));
1162
1163   return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1164                                                        id, args);
1165 }
1166
1167 \f
1168
1169 template<typename T>
1170 static T JNICALL
1171 _Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
1172 {
1173   obj = unwrap (obj);
1174   JvAssert (obj);
1175   T *ptr = (T *) ((char *) obj + field->getOffset ());
1176   return wrap_value (env, *ptr);
1177 }
1178
1179 template<typename T>
1180 static void JNICALL
1181 _Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
1182 {
1183   obj = unwrap (obj);
1184   value = unwrap (value);
1185
1186   JvAssert (obj);
1187   T *ptr = (T *) ((char *) obj + field->getOffset ());
1188   *ptr = value;
1189 }
1190
1191 template<jboolean is_static>
1192 static jfieldID JNICALL
1193 _Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
1194                        const char *name, const char *sig)
1195 {
1196   try
1197     {
1198       clazz = unwrap (clazz);
1199
1200       _Jv_InitClass (clazz);
1201
1202       _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1203
1204       // FIXME: assume that SIG isn't too long.
1205       int len = strlen (sig);
1206       char s[len + 1];
1207       for (int i = 0; i <= len; ++i)
1208         s[i] = (sig[i] == '/') ? '.' : sig[i];
1209       java::lang::ClassLoader *loader = clazz->getClassLoaderInternal ();
1210       jclass field_class = _Jv_FindClassFromSignature ((char *) s, loader);
1211       if (! field_class)
1212         throw new java::lang::ClassNotFoundException(JvNewStringUTF(s));
1213
1214       while (clazz != NULL)
1215         {
1216           // We acquire the class lock so that fields aren't resolved
1217           // while we are running.
1218           JvSynchronize sync (clazz);
1219
1220           jint count = (is_static
1221                         ? JvNumStaticFields (clazz)
1222                         : JvNumInstanceFields (clazz));
1223           jfieldID field = (is_static
1224                             ? JvGetFirstStaticField (clazz)
1225                             : JvGetFirstInstanceField (clazz));
1226           for (jint i = 0; i < count; ++i)
1227             {
1228               _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1229
1230               // The field might be resolved or it might not be.  It
1231               // is much simpler to always resolve it.
1232               _Jv_Linker::resolve_field (field, loader);
1233               if (_Jv_equalUtf8Consts (f_name, a_name)
1234                   && field->getClass() == field_class)
1235                 return field;
1236
1237               field = field->getNextField ();
1238             }
1239
1240           clazz = clazz->getSuperclass ();
1241         }
1242
1243       env->ex = new java::lang::NoSuchFieldError ();
1244     }
1245   catch (jthrowable t)
1246     {
1247       env->ex = t;
1248     }
1249   return NULL;
1250 }
1251
1252 template<typename T>
1253 static T JNICALL
1254 _Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
1255 {
1256   T *ptr = (T *) field->u.addr;
1257   return wrap_value (env, *ptr);
1258 }
1259
1260 template<typename T>
1261 static void JNICALL
1262 _Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
1263 {
1264   value = unwrap (value);
1265   T *ptr = (T *) field->u.addr;
1266   *ptr = value;
1267 }
1268
1269 static jstring JNICALL
1270 _Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
1271 {
1272   try
1273     {
1274       jstring r = _Jv_NewString (unichars, len);
1275       return (jstring) wrap_value (env, r);
1276     }
1277   catch (jthrowable t)
1278     {
1279       env->ex = t;
1280       return NULL;
1281     }
1282 }
1283
1284 static jsize JNICALL
1285 _Jv_JNI_GetStringLength (JNIEnv *, jstring string)
1286 {
1287   return unwrap (string)->length();
1288 }
1289
1290 static const jchar * JNICALL
1291 _Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
1292 {
1293   string = unwrap (string);
1294   jchar *result = _Jv_GetStringChars (string);
1295   mark_for_gc (string, global_ref_table);
1296   if (isCopy)
1297     *isCopy = false;
1298   return (const jchar *) result;
1299 }
1300
1301 static void JNICALL
1302 _Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
1303 {
1304   unmark_for_gc (unwrap (string), global_ref_table);
1305 }
1306
1307 static jstring JNICALL
1308 _Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
1309 {
1310   try
1311     {
1312       jstring result = JvNewStringUTF (bytes);
1313       return (jstring) wrap_value (env, result);
1314     }
1315   catch (jthrowable t)
1316     {
1317       env->ex = t;
1318       return NULL;
1319     }
1320 }
1321
1322 static jsize JNICALL
1323 _Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
1324 {
1325   return JvGetStringUTFLength (unwrap (string));
1326 }
1327
1328 static const char * JNICALL
1329 _Jv_JNI_GetStringUTFChars (JNIEnv *env, jstring string,
1330                            jboolean *isCopy)
1331 {
1332   try
1333     {
1334       string = unwrap (string);
1335       if (string == NULL)
1336         return NULL;
1337       jsize len = JvGetStringUTFLength (string);
1338       char *r = (char *) _Jv_Malloc (len + 1);
1339       JvGetStringUTFRegion (string, 0, string->length(), r);
1340       r[len] = '\0';
1341
1342       if (isCopy)
1343         *isCopy = true;
1344
1345       return (const char *) r;
1346     }
1347   catch (jthrowable t)
1348     {
1349       env->ex = t;
1350       return NULL;
1351     }
1352 }
1353
1354 static void JNICALL
1355 _Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
1356 {
1357   _Jv_Free ((void *) utf);
1358 }
1359
1360 static void JNICALL
1361 _Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start,
1362                          jsize len, jchar *buf)
1363 {
1364   string = unwrap (string);
1365   jchar *result = _Jv_GetStringChars (string);
1366   if (start < 0 || start > string->length ()
1367       || len < 0 || start + len > string->length ())
1368     {
1369       try
1370         {
1371           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1372         }
1373       catch (jthrowable t)
1374         {
1375           env->ex = t;
1376         }
1377     }
1378   else
1379     memcpy (buf, &result[start], len * sizeof (jchar));
1380 }
1381
1382 static void JNICALL
1383 _Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
1384                             jsize len, char *buf)
1385 {
1386   str = unwrap (str);
1387
1388   if (start < 0 || start > str->length ()
1389       || len < 0 || start + len > str->length ())
1390     {
1391       try
1392         {
1393           env->ex = new java::lang::StringIndexOutOfBoundsException ();
1394         }
1395       catch (jthrowable t)
1396         {
1397           env->ex = t;
1398         }
1399     }
1400   else
1401     _Jv_GetStringUTFRegion (str, start, len, buf);
1402 }
1403
1404 static const jchar * JNICALL
1405 _Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
1406 {
1407   jchar *result = _Jv_GetStringChars (unwrap (str));
1408   if (isCopy)
1409     *isCopy = false;
1410   return result;
1411 }
1412
1413 static void JNICALL
1414 _Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
1415 {
1416   // Nothing.
1417 }
1418
1419 static jsize JNICALL
1420 _Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
1421 {
1422   return unwrap (array)->length;
1423 }
1424
1425 static jobjectArray JNICALL
1426 _Jv_JNI_NewObjectArray (JNIEnv *env, jsize length,
1427                         jclass elementClass, jobject init)
1428 {
1429   try
1430     {
1431       elementClass = unwrap (elementClass);
1432       init = unwrap (init);
1433
1434       _Jv_CheckCast (elementClass, init);
1435       jarray result = JvNewObjectArray (length, elementClass, init);
1436       return (jobjectArray) wrap_value (env, result);
1437     }
1438   catch (jthrowable t)
1439     {
1440       env->ex = t;
1441       return NULL;
1442     }
1443 }
1444
1445 static jobject JNICALL
1446 _Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array,
1447                                jsize index)
1448 {
1449   if ((unsigned) index >= (unsigned) array->length)
1450     _Jv_ThrowBadArrayIndex (index);
1451   jobject *elts = elements (unwrap (array));
1452   return wrap_value (env, elts[index]);
1453 }
1454
1455 static void JNICALL
1456 _Jv_JNI_SetObjectArrayElement (JNIEnv *env, jobjectArray array,
1457                                jsize index, jobject value)
1458 {
1459   try
1460     {
1461       array = unwrap (array);
1462       value = unwrap (value);
1463
1464       _Jv_CheckArrayStore (array, value);
1465       if ((unsigned) index >= (unsigned) array->length)
1466         _Jv_ThrowBadArrayIndex (index);
1467       jobject *elts = elements (array);
1468       elts[index] = value;
1469     }
1470   catch (jthrowable t)
1471     {
1472       env->ex = t;
1473     }
1474 }
1475
1476 template<typename T, jclass K>
1477 static JArray<T> * JNICALL
1478 _Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
1479 {
1480   try
1481     {
1482       return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1483     }
1484   catch (jthrowable t)
1485     {
1486       env->ex = t;
1487       return NULL;
1488     }
1489 }
1490
1491 template<typename T, jclass K>
1492 static T * JNICALL
1493 _Jv_JNI_GetPrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1494                                    jboolean *isCopy)
1495 {
1496   array = unwrap (array);
1497   if (! _Jv_JNI_check_types (env, array, K))
1498     return NULL;
1499   T *elts = elements (array);
1500   if (isCopy)
1501     {
1502       // We elect never to copy.
1503       *isCopy = false;
1504     }
1505   mark_for_gc (array, global_ref_table);
1506   return elts;
1507 }
1508
1509 template<typename T, jclass K>
1510 static void JNICALL
1511 _Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1512                                        T *, jint /* mode */)
1513 {
1514   array = unwrap (array);
1515   _Jv_JNI_check_types (env, array, K);
1516   // Note that we ignore MODE.  We can do this because we never copy
1517   // the array elements.  My reading of the JNI documentation is that
1518   // this is an option for the implementor.
1519   unmark_for_gc (array, global_ref_table);
1520 }
1521
1522 template<typename T, jclass K>
1523 static void JNICALL
1524 _Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1525                                  jsize start, jsize len,
1526                                  T *buf)
1527 {
1528   array = unwrap (array);
1529   if (! _Jv_JNI_check_types (env, array, K))
1530     return;
1531
1532   // The cast to unsigned lets us save a comparison.
1533   if (start < 0 || len < 0
1534       || (unsigned long) (start + len) > (unsigned long) array->length)
1535     {
1536       try
1537         {
1538           // FIXME: index.
1539           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1540         }
1541       catch (jthrowable t)
1542         {
1543           // Could have thown out of memory error.
1544           env->ex = t;
1545         }
1546     }
1547   else
1548     {
1549       T *elts = elements (array) + start;
1550       memcpy (buf, elts, len * sizeof (T));
1551     }
1552 }
1553
1554 template<typename T, jclass K>
1555 static void JNICALL
1556 _Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1557                                  jsize start, jsize len, T *buf)
1558 {
1559   array = unwrap (array);
1560   if (! _Jv_JNI_check_types (env, array, K))
1561     return;
1562
1563   // The cast to unsigned lets us save a comparison.
1564   if (start < 0 || len < 0
1565       || (unsigned long) (start + len) > (unsigned long) array->length)
1566     {
1567       try
1568         {
1569           // FIXME: index.
1570           env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1571         }
1572       catch (jthrowable t)
1573         {
1574           env->ex = t;
1575         }
1576     }
1577   else
1578     {
1579       T *elts = elements (array) + start;
1580       memcpy (elts, buf, len * sizeof (T));
1581     }
1582 }
1583
1584 static void * JNICALL
1585 _Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
1586                                    jboolean *isCopy)
1587 {
1588   array = unwrap (array);
1589   // FIXME: does this work?
1590   jclass klass = array->getClass()->getComponentType();
1591   JvAssert (klass->isPrimitive ());
1592   char *r = _Jv_GetArrayElementFromElementType (array, klass);
1593   if (isCopy)
1594     *isCopy = false;
1595   return r;
1596 }
1597
1598 static void JNICALL
1599 _Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
1600 {
1601   // Nothing.
1602 }
1603
1604 static jint JNICALL
1605 _Jv_JNI_MonitorEnter (JNIEnv *env, jobject obj)
1606 {
1607   try
1608     {
1609       _Jv_MonitorEnter (unwrap (obj));
1610       return 0;
1611     }
1612   catch (jthrowable t)
1613     {
1614       env->ex = t;
1615     }
1616   return JNI_ERR;
1617 }
1618
1619 static jint JNICALL
1620 _Jv_JNI_MonitorExit (JNIEnv *env, jobject obj)
1621 {
1622   try
1623     {
1624       _Jv_MonitorExit (unwrap (obj));
1625       return 0;
1626     }
1627   catch (jthrowable t)
1628     {
1629       env->ex = t;
1630     }
1631   return JNI_ERR;
1632 }
1633
1634 // JDK 1.2
1635 jobject JNICALL
1636 _Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
1637                           jboolean)
1638 {
1639   try
1640     {
1641       cls = unwrap (cls);
1642       java::lang::reflect::Field *field = new java::lang::reflect::Field();
1643       field->declaringClass = cls;
1644       field->offset = (char*) fieldID - (char *) cls->fields;
1645       field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1646       return wrap_value (env, field);
1647     }
1648   catch (jthrowable t)
1649     {
1650       env->ex = t;
1651     }
1652   return NULL;
1653 }
1654
1655 // JDK 1.2
1656 static jfieldID JNICALL
1657 _Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
1658 {
1659   using namespace java::lang::reflect;
1660
1661   f = unwrap (f);
1662   Field *field = reinterpret_cast<Field *> (f);
1663   return _Jv_FromReflectedField (field);
1664 }
1665
1666 jobject JNICALL
1667 _Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
1668                            jboolean)
1669 {
1670   using namespace java::lang::reflect;
1671
1672   jobject result = NULL;
1673   klass = unwrap (klass);
1674
1675   try
1676     {
1677       if (_Jv_equalUtf8Consts (id->name, init_name))
1678         {
1679           // A constructor.
1680           Constructor *cons = new Constructor ();
1681           cons->offset = (char *) id - (char *) &klass->methods;
1682           cons->declaringClass = klass;
1683           result = cons;
1684         }
1685       else
1686         {
1687           Method *meth = new Method ();
1688           meth->offset = (char *) id - (char *) &klass->methods;
1689           meth->declaringClass = klass;
1690           result = meth;
1691         }
1692     }
1693   catch (jthrowable t)
1694     {
1695       env->ex = t;
1696     }
1697
1698   return wrap_value (env, result);
1699 }
1700
1701 static jmethodID JNICALL
1702 _Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
1703 {
1704   using namespace java::lang::reflect;
1705   method = unwrap (method);
1706   if (Method::class$.isInstance (method))
1707     return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1708   return
1709     _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1710 }
1711
1712 // JDK 1.2.
1713 jweak JNICALL
1714 _Jv_JNI_NewWeakGlobalRef (JNIEnv *env, jobject obj)
1715 {
1716   using namespace gnu::gcj::runtime;
1717   JNIWeakRef *ref = NULL;
1718
1719   try
1720     {
1721       // This seems weird but I think it is correct.
1722       obj = unwrap (obj);
1723       ref = new JNIWeakRef (obj);
1724       mark_for_gc (ref, global_ref_table);
1725     }
1726   catch (jthrowable t)
1727     {
1728       env->ex = t;
1729     }
1730
1731   return reinterpret_cast<jweak> (ref);
1732 }
1733
1734 void JNICALL
1735 _Jv_JNI_DeleteWeakGlobalRef (JNIEnv *, jweak obj)
1736 {
1737   using namespace gnu::gcj::runtime;
1738   JNIWeakRef *ref = reinterpret_cast<JNIWeakRef *> (obj);
1739   unmark_for_gc (ref, global_ref_table);
1740   ref->clear ();
1741 }
1742
1743 \f
1744
1745 // Direct byte buffers.
1746
1747 static jobject JNICALL
1748 _Jv_JNI_NewDirectByteBuffer (JNIEnv *, void *address, jlong length)
1749 {
1750   using namespace gnu::gcj;
1751   using namespace java::nio;
1752   return new DirectByteBufferImpl$ReadWrite
1753     (reinterpret_cast<RawData *> (address), length);
1754 }
1755
1756 static void * JNICALL
1757 _Jv_JNI_GetDirectBufferAddress (JNIEnv *, jobject buffer)
1758 {
1759   using namespace java::nio;
1760   if (! _Jv_IsInstanceOf (buffer, &Buffer::class$))
1761     return NULL;
1762   Buffer *tmp = static_cast<Buffer *> (buffer);
1763   return reinterpret_cast<void *> (tmp->address);
1764 }
1765
1766 static jlong JNICALL
1767 _Jv_JNI_GetDirectBufferCapacity (JNIEnv *, jobject buffer)
1768 {
1769   using namespace java::nio;
1770   if (! _Jv_IsInstanceOf (buffer, &Buffer::class$))
1771     return -1;
1772   Buffer *tmp = static_cast<Buffer *> (buffer);
1773   if (tmp->address == NULL)
1774     return -1;
1775   return tmp->capacity();
1776 }
1777
1778 \f
1779
1780 // Hash table of native methods.
1781 static JNINativeMethod *nathash;
1782 // Number of slots used.
1783 static int nathash_count = 0;
1784 // Number of slots available.  Must be power of 2.
1785 static int nathash_size = 0;
1786
1787 #define DELETED_ENTRY ((char *) (~0))
1788
1789 // Compute a hash value for a native method descriptor.
1790 static int
1791 hash (const JNINativeMethod *method)
1792 {
1793   char *ptr;
1794   int hash = 0;
1795
1796   ptr = method->name;
1797   while (*ptr)
1798     hash = (31 * hash) + *ptr++;
1799
1800   ptr = method->signature;
1801   while (*ptr)
1802     hash = (31 * hash) + *ptr++;
1803
1804   return hash;
1805 }
1806
1807 // Find the slot where a native method goes.
1808 static JNINativeMethod *
1809 nathash_find_slot (const JNINativeMethod *method)
1810 {
1811   jint h = hash (method);
1812   int step = (h ^ (h >> 16)) | 1;
1813   int w = h & (nathash_size - 1);
1814   int del = -1;
1815
1816   for (;;)
1817     {
1818       JNINativeMethod *slotp = &nathash[w];
1819       if (slotp->name == NULL)
1820         {
1821           if (del >= 0)
1822             return &nathash[del];
1823           else
1824             return slotp;
1825         }
1826       else if (slotp->name == DELETED_ENTRY)
1827         del = w;
1828       else if (! strcmp (slotp->name, method->name)
1829                && ! strcmp (slotp->signature, method->signature))
1830         return slotp;
1831       w = (w + step) & (nathash_size - 1);
1832     }
1833 }
1834
1835 // Find a method.  Return NULL if it isn't in the hash table.
1836 static void *
1837 nathash_find (JNINativeMethod *method)
1838 {
1839   if (nathash == NULL)
1840     return NULL;
1841   JNINativeMethod *slot = nathash_find_slot (method);
1842   if (slot->name == NULL || slot->name == DELETED_ENTRY)
1843     return NULL;
1844   return slot->fnPtr;
1845 }
1846
1847 static void
1848 natrehash ()
1849 {
1850   if (nathash == NULL)
1851     {
1852       nathash_size = 1024;
1853       nathash =
1854         (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1855                                             * sizeof (JNINativeMethod));
1856     }
1857   else
1858     {
1859       int savesize = nathash_size;
1860       JNINativeMethod *savehash = nathash;
1861       nathash_size *= 2;
1862       nathash =
1863         (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1864                                             * sizeof (JNINativeMethod));
1865
1866       for (int i = 0; i < savesize; ++i)
1867         {
1868           if (savehash[i].name != NULL && savehash[i].name != DELETED_ENTRY)
1869             {
1870               JNINativeMethod *slot = nathash_find_slot (&savehash[i]);
1871               *slot = savehash[i];
1872             }
1873         }
1874     }
1875 }
1876
1877 static void
1878 nathash_add (const JNINativeMethod *method)
1879 {
1880   if (3 * nathash_count >= 2 * nathash_size)
1881     natrehash ();
1882   JNINativeMethod *slot = nathash_find_slot (method);
1883   // If the slot has a real entry in it, then there is no work to do.
1884   if (slot->name != NULL && slot->name != DELETED_ENTRY)
1885     return;
1886   // FIXME
1887   slot->name = strdup (method->name);
1888   // This was already strduped in _Jv_JNI_RegisterNatives.
1889   slot->signature = method->signature;
1890   slot->fnPtr = method->fnPtr;
1891 }
1892
1893 static jint JNICALL
1894 _Jv_JNI_RegisterNatives (JNIEnv *env, jclass klass,
1895                          const JNINativeMethod *methods,
1896                          jint nMethods)
1897 {
1898   // Synchronize while we do the work.  This must match
1899   // synchronization in some other functions that manipulate or use
1900   // the nathash table.
1901   JvSynchronize sync (global_ref_table);
1902
1903   JNINativeMethod dottedMethod;
1904
1905   // Look at each descriptor given us, and find the corresponding
1906   // method in the class.
1907   for (int j = 0; j < nMethods; ++j)
1908     {
1909       bool found = false;
1910
1911       _Jv_Method *imeths = JvGetFirstMethod (klass);
1912       for (int i = 0; i < JvNumMethods (klass); ++i)
1913         {
1914           _Jv_Method *self = &imeths[i];
1915
1916           // Copy this JNINativeMethod and do a slash to dot
1917           // conversion on the signature.
1918           dottedMethod.name = methods[j].name;
1919           dottedMethod.signature = strdup (methods[j].signature);
1920           dottedMethod.fnPtr = methods[j].fnPtr;
1921           char *c = dottedMethod.signature;
1922           while (*c)
1923             {
1924               if (*c == '/')
1925                 *c = '.';
1926               c++;
1927             }
1928
1929           if (! strcmp (self->name->chars (), dottedMethod.name)
1930               && ! strcmp (self->signature->chars (), dottedMethod.signature))
1931             {
1932               if (! (self->accflags & java::lang::reflect::Modifier::NATIVE))
1933                 break;
1934
1935               // Found a match that is native.
1936               found = true;
1937               nathash_add (&dottedMethod);
1938
1939               break;
1940             }
1941         }
1942
1943       if (! found)
1944         {
1945           jstring m = JvNewStringUTF (methods[j].name);
1946           try
1947             {
1948               env->ex = new java::lang::NoSuchMethodError (m);
1949             }
1950           catch (jthrowable t)
1951             {
1952               env->ex = t;
1953             }
1954           return JNI_ERR;
1955         }
1956     }
1957
1958   return JNI_OK;
1959 }
1960
1961 static jint JNICALL
1962 _Jv_JNI_UnregisterNatives (JNIEnv *, jclass)
1963 {
1964   // FIXME -- we could implement this.
1965   return JNI_ERR;
1966 }
1967
1968 \f
1969
1970 // Add a character to the buffer, encoding properly.
1971 static void
1972 add_char (char *buf, jchar c, int *here)
1973 {
1974   if (c == '_')
1975     {
1976       buf[(*here)++] = '_';
1977       buf[(*here)++] = '1';
1978     }
1979   else if (c == ';')
1980     {
1981       buf[(*here)++] = '_';
1982       buf[(*here)++] = '2';
1983     }
1984   else if (c == '[')
1985     {
1986       buf[(*here)++] = '_';
1987       buf[(*here)++] = '3';
1988     }
1989
1990   // Also check for `.' here because we might be passed an internal
1991   // qualified class name like `foo.bar'.
1992   else if (c == '/' || c == '.')
1993     buf[(*here)++] = '_';
1994   else if ((c >= '0' && c <= '9')
1995            || (c >= 'a' && c <= 'z')
1996            || (c >= 'A' && c <= 'Z'))
1997     buf[(*here)++] = (char) c;
1998   else
1999     {
2000       // "Unicode" character.
2001       buf[(*here)++] = '_';
2002       buf[(*here)++] = '0';
2003       for (int i = 0; i < 4; ++i)
2004         {
2005           int val = c & 0x0f;
2006           buf[(*here) + 3 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
2007           c >>= 4;
2008         }
2009       *here += 4;
2010     }
2011 }
2012
2013 // Compute a mangled name for a native function.  This computes the
2014 // long name, and also returns an index which indicates where a NUL
2015 // can be placed to create the short name.  This function assumes that
2016 // the buffer is large enough for its results.
2017 static void
2018 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
2019               _Jv_Utf8Const *signature, char *buf, int *long_start)
2020 {
2021   strcpy (buf, "Java_");
2022   int here = 5;
2023
2024   // Add fully qualified class name.
2025   jchar *chars = _Jv_GetStringChars (klass->getName ());
2026   jint len = klass->getName ()->length ();
2027   for (int i = 0; i < len; ++i)
2028     add_char (buf, chars[i], &here);
2029
2030   // Don't use add_char because we need a literal `_'.
2031   buf[here++] = '_';
2032
2033   const unsigned char *fn = (const unsigned char *) func_name->chars ();
2034   const unsigned char *limit = fn + func_name->len ();
2035   for (int i = 0; ; ++i)
2036     {
2037       int ch = UTF8_GET (fn, limit);
2038       if (ch < 0)
2039         break;
2040       add_char (buf, ch, &here);
2041     }
2042
2043   // This is where the long signature begins.
2044   *long_start = here;
2045   buf[here++] = '_';
2046   buf[here++] = '_';
2047
2048   const unsigned char *sig = (const unsigned char *) signature->chars ();
2049   limit = sig + signature->len ();
2050   JvAssert (sig[0] == '(');
2051   ++sig;
2052   while (1)
2053     {
2054       int ch = UTF8_GET (sig, limit);
2055       if (ch == ')' || ch < 0)
2056         break;
2057       add_char (buf, ch, &here);
2058     }
2059
2060   buf[here] = '\0';
2061 }
2062
2063 // Return the current thread's JNIEnv; if one does not exist, create
2064 // it.  Also create a new system frame for use.  This is `extern "C"'
2065 // because the compiler calls it.
2066 extern "C" JNIEnv *
2067 _Jv_GetJNIEnvNewFrame (jclass klass)
2068 {
2069   JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2070   if (__builtin_expect (env == NULL, false))
2071     {
2072       env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2073       env->p = &_Jv_JNIFunctions;
2074       env->klass = klass;
2075       env->locals = NULL;
2076       // We set env->ex below.
2077
2078       // Set up the bottom, reusable frame.
2079       env->bottom_locals = (_Jv_JNI_LocalFrame *)
2080         _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2081                              + (FRAME_SIZE
2082                                 * sizeof (jobject)));
2083
2084       env->bottom_locals->marker = MARK_SYSTEM;
2085       env->bottom_locals->size = FRAME_SIZE;
2086       env->bottom_locals->next = NULL;
2087       env->bottom_locals->allocated_p = 0;
2088       memset (&env->bottom_locals->vec[0], 0,
2089               env->bottom_locals->size * sizeof (jobject));
2090
2091       _Jv_SetCurrentJNIEnv (env);
2092     }
2093
2094   // If we're in a simple JNI call (non-nested), we can just reuse the
2095   // locals frame we allocated many calls ago, back when the env was first
2096   // built, above.
2097
2098   if (__builtin_expect (env->locals == NULL, true))
2099     env->locals = env->bottom_locals;
2100
2101   else
2102     {
2103       // Alternatively, we might be re-entering JNI, in which case we can't
2104       // reuse the bottom_locals frame, because it is already underneath
2105       // us. So we need to make a new one.
2106
2107       _Jv_JNI_LocalFrame *frame
2108         = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2109                                                       + (FRAME_SIZE
2110                                                          * sizeof (jobject)));
2111
2112       frame->marker = MARK_SYSTEM;
2113       frame->size = FRAME_SIZE;
2114       frame->allocated_p = 0;
2115       frame->next = env->locals;
2116
2117       memset (&frame->vec[0], 0,
2118               frame->size * sizeof (jobject));
2119
2120       env->locals = frame;
2121     }
2122
2123   env->ex = NULL;
2124
2125   return env;
2126 }
2127
2128 // Destroy the env's reusable resources. This is called from the thread
2129 // destructor "finalize_native" in natThread.cc
2130 void
2131 _Jv_FreeJNIEnv (_Jv_JNIEnv *env)
2132 {
2133   if (env == NULL)
2134     return;
2135
2136   if (env->bottom_locals != NULL)
2137     _Jv_Free (env->bottom_locals);
2138
2139   _Jv_Free (env);
2140 }
2141
2142 // Return the function which implements a particular JNI method.  If
2143 // we can't find the function, we throw the appropriate exception.
2144 // This is `extern "C"' because the compiler uses it.
2145 extern "C" void *
2146 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
2147                      _Jv_Utf8Const *signature, MAYBE_UNUSED int args_size)
2148 {
2149   int name_length = name->len();
2150   int sig_length = signature->len();
2151   char buf[10 + 6 * (name_length + sig_length) + 12];
2152   int long_start;
2153   void *function;
2154
2155   // Synchronize on something convenient.  Right now we use the hash.
2156   JvSynchronize sync (global_ref_table);
2157
2158   // First see if we have an override in the hash table.
2159   strncpy (buf, name->chars (), name_length);
2160   buf[name_length] = '\0';
2161   strncpy (buf + name_length + 1, signature->chars (), sig_length);
2162   buf[name_length + sig_length + 1] = '\0';
2163   JNINativeMethod meth;
2164   meth.name = buf;
2165   meth.signature = buf + name_length + 1;
2166   function = nathash_find (&meth);
2167   if (function != NULL)
2168     return function;
2169
2170   // If there was no override, then look in the symbol table.
2171   buf[0] = '_';
2172   mangled_name (klass, name, signature, buf + 1, &long_start);
2173   char c = buf[long_start + 1];
2174   buf[long_start + 1] = '\0';
2175
2176   function = _Jv_FindSymbolInExecutable (buf + 1);
2177 #ifdef WIN32
2178   // On Win32, we use the "stdcall" calling convention (see JNICALL
2179   // in jni.h).
2180   //
2181   // For a function named 'fooBar' that takes 'nn' bytes as arguments,
2182   // by default, MinGW GCC exports it as 'fooBar@nn', MSVC exports it
2183   // as '_fooBar@nn' and Borland C exports it as 'fooBar'. We try to
2184   // take care of all these variations here.
2185
2186   char asz_buf[12];    /* '@' + '2147483647' (32-bit INT_MAX) + '\0' */
2187   char long_nm_sv[11]; /* Ditto, except for the '\0'. */
2188
2189   if (function == NULL)
2190     {
2191       // We have tried searching for the 'fooBar' form (BCC) - now
2192       // try the others.
2193
2194       // First, save the part of the long name that will be damaged
2195       // by appending '@nn'.
2196       memcpy (long_nm_sv, (buf + long_start + 1 + 1), sizeof (long_nm_sv));
2197
2198       sprintf (asz_buf, "@%d", args_size);
2199       strcat (buf, asz_buf);
2200
2201       // Search for the '_fooBar@nn' form (MSVC).
2202       function = _Jv_FindSymbolInExecutable (buf);
2203
2204       if (function == NULL)
2205         {
2206           // Search for the 'fooBar@nn' form (MinGW GCC).
2207           function = _Jv_FindSymbolInExecutable (buf + 1);
2208         }
2209     }
2210 #endif /* WIN32 */
2211
2212   if (function == NULL)
2213     {
2214       buf[long_start + 1] = c;
2215 #ifdef WIN32
2216       // Restore the part of the long name that was damaged by
2217       // appending the '@nn'.
2218       memcpy ((buf + long_start + 1 + 1), long_nm_sv, sizeof (long_nm_sv));
2219 #endif /* WIN32 */
2220       function = _Jv_FindSymbolInExecutable (buf + 1);
2221       if (function == NULL)
2222         {
2223 #ifdef WIN32
2224           strcat (buf, asz_buf);
2225           function = _Jv_FindSymbolInExecutable (buf);
2226           if (function == NULL)
2227             function = _Jv_FindSymbolInExecutable (buf + 1);
2228
2229           if (function == NULL)
2230 #endif /* WIN32 */
2231             {
2232               jstring str = JvNewStringUTF (name->chars ());
2233               throw new java::lang::UnsatisfiedLinkError (str);
2234             }
2235         }
2236     }
2237
2238   return function;
2239 }
2240
2241 #ifdef INTERPRETER
2242
2243 // This function is the stub which is used to turn an ordinary (CNI)
2244 // method call into a JNI call.
2245 void
2246 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
2247 {
2248   _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
2249
2250   JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
2251
2252   // FIXME: we should mark every reference parameter as a local.  For
2253   // now we assume a conservative GC, and we assume that the
2254   // references are on the stack somewhere.
2255
2256   // We cache the value that we find, of course, but if we don't find
2257   // a value we don't cache that fact -- we might subsequently load a
2258   // library which finds the function in question.
2259   {
2260     // Synchronize on a convenient object to ensure sanity in case two
2261     // threads reach this point for the same function at the same
2262     // time.
2263     JvSynchronize sync (global_ref_table);
2264     if (_this->function == NULL)
2265       {
2266         int args_size = sizeof (JNIEnv *) + _this->args_raw_size;
2267
2268         if (_this->self->accflags & java::lang::reflect::Modifier::STATIC)
2269           args_size += sizeof (_this->defining_class);
2270
2271         _this->function = _Jv_LookupJNIMethod (_this->defining_class,
2272                                                _this->self->name,
2273                                                _this->self->signature,
2274                                                args_size);
2275       }
2276   }
2277
2278   JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
2279   ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
2280   int offset = 0;
2281
2282   // First argument is always the environment pointer.
2283   real_args[offset++].ptr = env;
2284
2285   // For a static method, we pass in the Class.  For non-static
2286   // methods, the `this' argument is already handled.
2287   if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2288     real_args[offset++].ptr = _this->defining_class;
2289
2290   // In libgcj, the callee synchronizes.
2291   jobject sync = NULL;
2292   if ((_this->self->accflags & java::lang::reflect::Modifier::SYNCHRONIZED))
2293     {
2294       if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2295         sync = _this->defining_class;
2296       else
2297         sync = (jobject) args[0].ptr;
2298       _Jv_MonitorEnter (sync);
2299     }
2300
2301   // Copy over passed-in arguments.
2302   memcpy (&real_args[offset], args, _this->args_raw_size);
2303
2304   // The actual call to the JNI function.
2305 #if FFI_NATIVE_RAW_API
2306   ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2307                 ret, real_args);
2308 #else
2309   ffi_java_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2310                      ret, real_args);
2311 #endif
2312
2313   // We might need to unwrap a JNI weak reference here.
2314   if (_this->jni_cif.rtype == &ffi_type_pointer)
2315     {
2316       _Jv_value *val = (_Jv_value *) ret;
2317       val->object_value = unwrap (val->object_value);
2318     }
2319
2320   if (sync != NULL)
2321     _Jv_MonitorExit (sync);
2322
2323   _Jv_JNI_PopSystemFrame (env);
2324 }
2325
2326 #endif /* INTERPRETER */
2327
2328 \f
2329
2330 //
2331 // Invocation API.
2332 //
2333
2334 // An internal helper function.
2335 static jint
2336 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv,
2337                              void *args, jboolean is_daemon)
2338 {
2339   JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
2340   java::lang::ThreadGroup *group = NULL;
2341
2342   if (attach)
2343     {
2344       // FIXME: do we really want to support 1.1?
2345       if (attach->version != JNI_VERSION_1_4
2346           && attach->version != JNI_VERSION_1_2
2347           && attach->version != JNI_VERSION_1_1)
2348         return JNI_EVERSION;
2349
2350       JvAssert (java::lang::ThreadGroup::class$.isInstance (attach->group));
2351       group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
2352     }
2353
2354   // Attaching an already-attached thread is a no-op.
2355   JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2356   if (env != NULL)
2357     {
2358       *penv = reinterpret_cast<void *> (env);
2359       return 0;
2360     }
2361
2362   env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2363   if (env == NULL)
2364     return JNI_ERR;
2365   env->p = &_Jv_JNIFunctions;
2366   env->ex = NULL;
2367   env->klass = NULL;
2368   env->bottom_locals
2369     = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2370                                                   + (FRAME_SIZE
2371                                                      * sizeof (jobject)));
2372   env->locals = env->bottom_locals;
2373   if (env->locals == NULL)
2374     {
2375       _Jv_Free (env);
2376       return JNI_ERR;
2377     }
2378
2379   env->locals->allocated_p = 0;
2380   env->locals->marker = MARK_SYSTEM;
2381   env->locals->size = FRAME_SIZE;
2382   env->locals->next = NULL;
2383
2384   for (int i = 0; i < env->locals->size; ++i)
2385     env->locals->vec[i] = NULL;
2386
2387   *penv = reinterpret_cast<void *> (env);
2388
2389   // This thread might already be a Java thread -- this function might
2390   // have been called simply to set the new JNIEnv.
2391   if (_Jv_ThreadCurrent () == NULL)
2392     {
2393       try
2394         {
2395           if (is_daemon)
2396             _Jv_AttachCurrentThreadAsDaemon (name, group);
2397           else
2398             _Jv_AttachCurrentThread (name, group);
2399         }
2400       catch (jthrowable t)
2401         {
2402           return JNI_ERR;
2403         }
2404     }
2405   _Jv_SetCurrentJNIEnv (env);
2406
2407   return 0;
2408 }
2409
2410 // This is the one actually used by JNI.
2411 static jint JNICALL
2412 _Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
2413 {
2414   return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, false);
2415 }
2416
2417 static jint JNICALL
2418 _Jv_JNI_AttachCurrentThreadAsDaemon (JavaVM *vm, void **penv,
2419                                      void *args)
2420 {
2421   return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, true);
2422 }
2423
2424 static jint JNICALL
2425 _Jv_JNI_DestroyJavaVM (JavaVM *vm)
2426 {
2427   JvAssert (the_vm && vm == the_vm);
2428
2429   union
2430   {
2431     JNIEnv *env;
2432     void *env_p;
2433   };
2434
2435   if (_Jv_ThreadCurrent () != NULL)
2436     {
2437       jstring main_name;
2438       // This sucks.
2439       try
2440         {
2441           main_name = JvNewStringLatin1 ("main");
2442         }
2443       catch (jthrowable t)
2444         {
2445           return JNI_ERR;
2446         }
2447
2448       jint r = _Jv_JNI_AttachCurrentThread (vm, main_name, &env_p,
2449                                             NULL, false);
2450       if (r < 0)
2451         return r;
2452     }
2453   else
2454     env = _Jv_GetCurrentJNIEnv ();
2455
2456   _Jv_ThreadWait ();
2457
2458   // Docs say that this always returns an error code.
2459   return JNI_ERR;
2460 }
2461
2462 jint JNICALL
2463 _Jv_JNI_DetachCurrentThread (JavaVM *)
2464 {
2465   jint code = _Jv_DetachCurrentThread ();
2466   return code  ? JNI_EDETACHED : 0;
2467 }
2468
2469 static jint JNICALL
2470 _Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
2471 {
2472   if (_Jv_ThreadCurrent () == NULL)
2473     {
2474       *penv = NULL;
2475       return JNI_EDETACHED;
2476     }
2477
2478 #ifdef ENABLE_JVMPI
2479   // Handle JVMPI requests.
2480   if (version == JVMPI_VERSION_1)
2481     {
2482       *penv = (void *) &_Jv_JVMPI_Interface;
2483       return 0;
2484     }
2485 #endif
2486
2487   // FIXME: do we really want to support 1.1?
2488   if (version != JNI_VERSION_1_4 && version != JNI_VERSION_1_2
2489       && version != JNI_VERSION_1_1)
2490     {
2491       *penv = NULL;
2492       return JNI_EVERSION;
2493     }
2494
2495   *penv = (void *) _Jv_GetCurrentJNIEnv ();
2496   return 0;
2497 }
2498
2499 jint JNICALL
2500 JNI_GetDefaultJavaVMInitArgs (void *args)
2501 {
2502   jint version = * (jint *) args;
2503   // Here we only support 1.2 and 1.4.
2504   if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2505     return JNI_EVERSION;
2506
2507   JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2508   ia->version = JNI_VERSION_1_4;
2509   ia->nOptions = 0;
2510   ia->options = NULL;
2511   ia->ignoreUnrecognized = true;
2512
2513   return 0;
2514 }
2515
2516 jint JNICALL
2517 JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
2518 {
2519   JvAssert (! the_vm);
2520
2521   jint version = * (jint *) args;
2522   // We only support 1.2 and 1.4.
2523   if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2524     return JNI_EVERSION;
2525
2526   JvVMInitArgs* vm_args = reinterpret_cast<JvVMInitArgs *> (args);
2527
2528   jint result = _Jv_CreateJavaVM (vm_args);
2529   if (result)
2530     return result;
2531
2532   // FIXME: synchronize
2533   JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2534   if (nvm == NULL)
2535     return JNI_ERR;
2536   nvm->functions = &_Jv_JNI_InvokeFunctions;
2537
2538   jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
2539   if (r < 0)
2540     return r;
2541
2542   the_vm = nvm;
2543   *vm = the_vm;
2544
2545   return 0;
2546 }
2547
2548 jint JNICALL
2549 JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
2550 {
2551   if (buf_len <= 0)
2552     return JNI_ERR;
2553
2554   // We only support a single VM.
2555   if (the_vm != NULL)
2556     {
2557       vm_buffer[0] = the_vm;
2558       *n_vms = 1;
2559     }
2560   else
2561     *n_vms = 0;
2562   return 0;
2563 }
2564
2565 JavaVM *
2566 _Jv_GetJavaVM ()
2567 {
2568   // FIXME: synchronize
2569   if (! the_vm)
2570     {
2571       JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2572       if (nvm != NULL)
2573         nvm->functions = &_Jv_JNI_InvokeFunctions;
2574       the_vm = nvm;
2575     }
2576
2577   // If this is a Java thread, we want to make sure it has an
2578   // associated JNIEnv.
2579   if (_Jv_ThreadCurrent () != NULL)
2580     {
2581       void *ignore;
2582       _Jv_JNI_AttachCurrentThread (the_vm, &ignore, NULL);
2583     }
2584
2585   return the_vm;
2586 }
2587
2588 static jint JNICALL
2589 _Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
2590 {
2591   *vm = _Jv_GetJavaVM ();
2592   return *vm == NULL ? JNI_ERR : JNI_OK;
2593 }
2594
2595 \f
2596
2597 #define RESERVED NULL
2598
2599 struct JNINativeInterface _Jv_JNIFunctions =
2600 {
2601   RESERVED,
2602   RESERVED,
2603   RESERVED,
2604   RESERVED,
2605   _Jv_JNI_GetVersion,           // GetVersion
2606   _Jv_JNI_DefineClass,          // DefineClass
2607   _Jv_JNI_FindClass,            // FindClass
2608   _Jv_JNI_FromReflectedMethod,  // FromReflectedMethod
2609   _Jv_JNI_FromReflectedField,   // FromReflectedField
2610   _Jv_JNI_ToReflectedMethod,    // ToReflectedMethod
2611   _Jv_JNI_GetSuperclass,        // GetSuperclass
2612   _Jv_JNI_IsAssignableFrom,     // IsAssignableFrom
2613   _Jv_JNI_ToReflectedField,     // ToReflectedField
2614   _Jv_JNI_Throw,                // Throw
2615   _Jv_JNI_ThrowNew,             // ThrowNew
2616   _Jv_JNI_ExceptionOccurred,    // ExceptionOccurred
2617   _Jv_JNI_ExceptionDescribe,    // ExceptionDescribe
2618   _Jv_JNI_ExceptionClear,       // ExceptionClear
2619   _Jv_JNI_FatalError,           // FatalError
2620
2621   _Jv_JNI_PushLocalFrame,       // PushLocalFrame
2622   _Jv_JNI_PopLocalFrame,        // PopLocalFrame
2623   _Jv_JNI_NewGlobalRef,         // NewGlobalRef
2624   _Jv_JNI_DeleteGlobalRef,      // DeleteGlobalRef
2625   _Jv_JNI_DeleteLocalRef,       // DeleteLocalRef
2626
2627   _Jv_JNI_IsSameObject,         // IsSameObject
2628
2629   _Jv_JNI_NewLocalRef,          // NewLocalRef
2630   _Jv_JNI_EnsureLocalCapacity,  // EnsureLocalCapacity
2631
2632   _Jv_JNI_AllocObject,              // AllocObject
2633   _Jv_JNI_NewObject,                // NewObject
2634   _Jv_JNI_NewObjectV,               // NewObjectV
2635   _Jv_JNI_NewObjectA,               // NewObjectA
2636   _Jv_JNI_GetObjectClass,           // GetObjectClass
2637   _Jv_JNI_IsInstanceOf,             // IsInstanceOf
2638   _Jv_JNI_GetAnyMethodID<false>,    // GetMethodID
2639
2640   _Jv_JNI_CallMethod<jobject>,          // CallObjectMethod
2641   _Jv_JNI_CallMethodV<jobject>,         // CallObjectMethodV
2642   _Jv_JNI_CallMethodA<jobject>,         // CallObjectMethodA
2643   _Jv_JNI_CallMethod<jboolean>,         // CallBooleanMethod
2644   _Jv_JNI_CallMethodV<jboolean>,        // CallBooleanMethodV
2645   _Jv_JNI_CallMethodA<jboolean>,        // CallBooleanMethodA
2646   _Jv_JNI_CallMethod<jbyte>,            // CallByteMethod
2647   _Jv_JNI_CallMethodV<jbyte>,           // CallByteMethodV
2648   _Jv_JNI_CallMethodA<jbyte>,           // CallByteMethodA
2649   _Jv_JNI_CallMethod<jchar>,            // CallCharMethod
2650   _Jv_JNI_CallMethodV<jchar>,           // CallCharMethodV
2651   _Jv_JNI_CallMethodA<jchar>,           // CallCharMethodA
2652   _Jv_JNI_CallMethod<jshort>,           // CallShortMethod
2653   _Jv_JNI_CallMethodV<jshort>,          // CallShortMethodV
2654   _Jv_JNI_CallMethodA<jshort>,          // CallShortMethodA
2655   _Jv_JNI_CallMethod<jint>,             // CallIntMethod
2656   _Jv_JNI_CallMethodV<jint>,            // CallIntMethodV
2657   _Jv_JNI_CallMethodA<jint>,            // CallIntMethodA
2658   _Jv_JNI_CallMethod<jlong>,            // CallLongMethod
2659   _Jv_JNI_CallMethodV<jlong>,           // CallLongMethodV
2660   _Jv_JNI_CallMethodA<jlong>,           // CallLongMethodA
2661   _Jv_JNI_CallMethod<jfloat>,           // CallFloatMethod
2662   _Jv_JNI_CallMethodV<jfloat>,          // CallFloatMethodV
2663   _Jv_JNI_CallMethodA<jfloat>,          // CallFloatMethodA
2664   _Jv_JNI_CallMethod<jdouble>,          // CallDoubleMethod
2665   _Jv_JNI_CallMethodV<jdouble>,         // CallDoubleMethodV
2666   _Jv_JNI_CallMethodA<jdouble>,         // CallDoubleMethodA
2667   _Jv_JNI_CallVoidMethod,               // CallVoidMethod
2668   _Jv_JNI_CallVoidMethodV,              // CallVoidMethodV
2669   _Jv_JNI_CallVoidMethodA,              // CallVoidMethodA
2670
2671   // Nonvirtual method invocation functions follow.
2672   _Jv_JNI_CallAnyMethod<jobject, nonvirtual>,   // CallNonvirtualObjectMethod
2673   _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>,  // CallNonvirtualObjectMethodV
2674   _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>,  // CallNonvirtualObjectMethodA
2675   _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>,  // CallNonvirtualBooleanMethod
2676   _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2677   _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2678   _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>,     // CallNonvirtualByteMethod
2679   _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>,    // CallNonvirtualByteMethodV
2680   _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>,    // CallNonvirtualByteMethodA
2681   _Jv_JNI_CallAnyMethod<jchar, nonvirtual>,     // CallNonvirtualCharMethod
2682   _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>,    // CallNonvirtualCharMethodV
2683   _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>,    // CallNonvirtualCharMethodA
2684   _Jv_JNI_CallAnyMethod<jshort, nonvirtual>,    // CallNonvirtualShortMethod
2685   _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>,   // CallNonvirtualShortMethodV
2686   _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>,   // CallNonvirtualShortMethodA
2687   _Jv_JNI_CallAnyMethod<jint, nonvirtual>,      // CallNonvirtualIntMethod
2688   _Jv_JNI_CallAnyMethodV<jint, nonvirtual>,     // CallNonvirtualIntMethodV
2689   _Jv_JNI_CallAnyMethodA<jint, nonvirtual>,     // CallNonvirtualIntMethodA
2690   _Jv_JNI_CallAnyMethod<jlong, nonvirtual>,     // CallNonvirtualLongMethod
2691   _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>,    // CallNonvirtualLongMethodV
2692   _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>,    // CallNonvirtualLongMethodA
2693   _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>,    // CallNonvirtualFloatMethod
2694   _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodV
2695   _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>,   // CallNonvirtualFloatMethodA
2696   _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>,   // CallNonvirtualDoubleMethod
2697   _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodV
2698   _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>,  // CallNonvirtualDoubleMethodA
2699   _Jv_JNI_CallAnyVoidMethod<nonvirtual>,        // CallNonvirtualVoidMethod
2700   _Jv_JNI_CallAnyVoidMethodV<nonvirtual>,       // CallNonvirtualVoidMethodV
2701   _Jv_JNI_CallAnyVoidMethodA<nonvirtual>,       // CallNonvirtualVoidMethodA
2702
2703   _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2704   _Jv_JNI_GetField<jobject>,    // GetObjectField
2705   _Jv_JNI_GetField<jboolean>,   // GetBooleanField
2706   _Jv_JNI_GetField<jbyte>,      // GetByteField
2707   _Jv_JNI_GetField<jchar>,      // GetCharField
2708   _Jv_JNI_GetField<jshort>,     // GetShortField
2709   _Jv_JNI_GetField<jint>,       // GetIntField
2710   _Jv_JNI_GetField<jlong>,      // GetLongField
2711   _Jv_JNI_GetField<jfloat>,     // GetFloatField
2712   _Jv_JNI_GetField<jdouble>,    // GetDoubleField
2713   _Jv_JNI_SetField,             // SetObjectField
2714   _Jv_JNI_SetField,             // SetBooleanField
2715   _Jv_JNI_SetField,             // SetByteField
2716   _Jv_JNI_SetField,             // SetCharField
2717   _Jv_JNI_SetField,             // SetShortField
2718   _Jv_JNI_SetField,             // SetIntField
2719   _Jv_JNI_SetField,             // SetLongField
2720   _Jv_JNI_SetField,             // SetFloatField
2721   _Jv_JNI_SetField,             // SetDoubleField
2722   _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2723
2724   _Jv_JNI_CallStaticMethod<jobject>,      // CallStaticObjectMethod
2725   _Jv_JNI_CallStaticMethodV<jobject>,     // CallStaticObjectMethodV
2726   _Jv_JNI_CallStaticMethodA<jobject>,     // CallStaticObjectMethodA
2727   _Jv_JNI_CallStaticMethod<jboolean>,     // CallStaticBooleanMethod
2728   _Jv_JNI_CallStaticMethodV<jboolean>,    // CallStaticBooleanMethodV
2729   _Jv_JNI_CallStaticMethodA<jboolean>,    // CallStaticBooleanMethodA
2730   _Jv_JNI_CallStaticMethod<jbyte>,        // CallStaticByteMethod
2731   _Jv_JNI_CallStaticMethodV<jbyte>,       // CallStaticByteMethodV
2732   _Jv_JNI_CallStaticMethodA<jbyte>,       // CallStaticByteMethodA
2733   _Jv_JNI_CallStaticMethod<jchar>,        // CallStaticCharMethod
2734   _Jv_JNI_CallStaticMethodV<jchar>,       // CallStaticCharMethodV
2735   _Jv_JNI_CallStaticMethodA<jchar>,       // CallStaticCharMethodA
2736   _Jv_JNI_CallStaticMethod<jshort>,       // CallStaticShortMethod
2737   _Jv_JNI_CallStaticMethodV<jshort>,      // CallStaticShortMethodV
2738   _Jv_JNI_CallStaticMethodA<jshort>,      // CallStaticShortMethodA
2739   _Jv_JNI_CallStaticMethod<jint>,         // CallStaticIntMethod
2740   _Jv_JNI_CallStaticMethodV<jint>,        // CallStaticIntMethodV
2741   _Jv_JNI_CallStaticMethodA<jint>,        // CallStaticIntMethodA
2742   _Jv_JNI_CallStaticMethod<jlong>,        // CallStaticLongMethod
2743   _Jv_JNI_CallStaticMethodV<jlong>,       // CallStaticLongMethodV
2744   _Jv_JNI_CallStaticMethodA<jlong>,       // CallStaticLongMethodA
2745   _Jv_JNI_CallStaticMethod<jfloat>,       // CallStaticFloatMethod
2746   _Jv_JNI_CallStaticMethodV<jfloat>,      // CallStaticFloatMethodV
2747   _Jv_JNI_CallStaticMethodA<jfloat>,      // CallStaticFloatMethodA
2748   _Jv_JNI_CallStaticMethod<jdouble>,      // CallStaticDoubleMethod
2749   _Jv_JNI_CallStaticMethodV<jdouble>,     // CallStaticDoubleMethodV
2750   _Jv_JNI_CallStaticMethodA<jdouble>,     // CallStaticDoubleMethodA
2751   _Jv_JNI_CallStaticVoidMethod,           // CallStaticVoidMethod
2752   _Jv_JNI_CallStaticVoidMethodV,          // CallStaticVoidMethodV
2753   _Jv_JNI_CallStaticVoidMethodA,          // CallStaticVoidMethodA
2754
2755   _Jv_JNI_GetAnyFieldID<true>,         // GetStaticFieldID
2756   _Jv_JNI_GetStaticField<jobject>,     // GetStaticObjectField
2757   _Jv_JNI_GetStaticField<jboolean>,    // GetStaticBooleanField
2758   _Jv_JNI_GetStaticField<jbyte>,       // GetStaticByteField
2759   _Jv_JNI_GetStaticField<jchar>,       // GetStaticCharField
2760   _Jv_JNI_GetStaticField<jshort>,      // GetStaticShortField
2761   _Jv_JNI_GetStaticField<jint>,        // GetStaticIntField
2762   _Jv_JNI_GetStaticField<jlong>,       // GetStaticLongField
2763   _Jv_JNI_GetStaticField<jfloat>,      // GetStaticFloatField
2764   _Jv_JNI_GetStaticField<jdouble>,     // GetStaticDoubleField
2765   _Jv_JNI_SetStaticField,              // SetStaticObjectField
2766   _Jv_JNI_SetStaticField,              // SetStaticBooleanField
2767   _Jv_JNI_SetStaticField,              // SetStaticByteField
2768   _Jv_JNI_SetStaticField,              // SetStaticCharField
2769   _Jv_JNI_SetStaticField,              // SetStaticShortField
2770   _Jv_JNI_SetStaticField,              // SetStaticIntField
2771   _Jv_JNI_SetStaticField,              // SetStaticLongField
2772   _Jv_JNI_SetStaticField,              // SetStaticFloatField
2773   _Jv_JNI_SetStaticField,              // SetStaticDoubleField
2774   _Jv_JNI_NewString,                   // NewString
2775   _Jv_JNI_GetStringLength,             // GetStringLength
2776   _Jv_JNI_GetStringChars,              // GetStringChars
2777   _Jv_JNI_ReleaseStringChars,          // ReleaseStringChars
2778   _Jv_JNI_NewStringUTF,                // NewStringUTF
2779   _Jv_JNI_GetStringUTFLength,          // GetStringUTFLength
2780   _Jv_JNI_GetStringUTFChars,           // GetStringUTFChars
2781   _Jv_JNI_ReleaseStringUTFChars,       // ReleaseStringUTFChars
2782   _Jv_JNI_GetArrayLength,              // GetArrayLength
2783   _Jv_JNI_NewObjectArray,              // NewObjectArray
2784   _Jv_JNI_GetObjectArrayElement,       // GetObjectArrayElement
2785   _Jv_JNI_SetObjectArrayElement,       // SetObjectArrayElement
2786   _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2787                                                             // NewBooleanArray
2788   _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>,     // NewByteArray
2789   _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>,     // NewCharArray
2790   _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>,   // NewShortArray
2791   _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>,       // NewIntArray
2792   _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>,     // NewLongArray
2793   _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>,   // NewFloatArray
2794   _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2795   _Jv_JNI_GetPrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2796                                             // GetBooleanArrayElements
2797   _Jv_JNI_GetPrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2798                                             // GetByteArrayElements
2799   _Jv_JNI_GetPrimitiveArrayElements<jchar, JvPrimClass (char)>,
2800                                             // GetCharArrayElements
2801   _Jv_JNI_GetPrimitiveArrayElements<jshort, JvPrimClass (short)>,
2802                                             // GetShortArrayElements
2803   _Jv_JNI_GetPrimitiveArrayElements<jint, JvPrimClass (int)>,
2804                                             // GetIntArrayElements
2805   _Jv_JNI_GetPrimitiveArrayElements<jlong, JvPrimClass (long)>,
2806                                             // GetLongArrayElements
2807   _Jv_JNI_GetPrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2808                                             // GetFloatArrayElements
2809   _Jv_JNI_GetPrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2810                                             // GetDoubleArrayElements
2811   _Jv_JNI_ReleasePrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2812                                             // ReleaseBooleanArrayElements
2813   _Jv_JNI_ReleasePrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2814                                             // ReleaseByteArrayElements
2815   _Jv_JNI_ReleasePrimitiveArrayElements<jchar, JvPrimClass (char)>,
2816                                             // ReleaseCharArrayElements
2817   _Jv_JNI_ReleasePrimitiveArrayElements<jshort, JvPrimClass (short)>,
2818                                             // ReleaseShortArrayElements
2819   _Jv_JNI_ReleasePrimitiveArrayElements<jint, JvPrimClass (int)>,
2820                                             // ReleaseIntArrayElements
2821   _Jv_JNI_ReleasePrimitiveArrayElements<jlong, JvPrimClass (long)>,
2822                                             // ReleaseLongArrayElements
2823   _Jv_JNI_ReleasePrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2824                                             // ReleaseFloatArrayElements
2825   _Jv_JNI_ReleasePrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2826                                             // ReleaseDoubleArrayElements
2827   _Jv_JNI_GetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2828                                             // GetBooleanArrayRegion
2829   _Jv_JNI_GetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2830                                             // GetByteArrayRegion
2831   _Jv_JNI_GetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2832                                             // GetCharArrayRegion
2833   _Jv_JNI_GetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2834                                             // GetShortArrayRegion
2835   _Jv_JNI_GetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2836                                             // GetIntArrayRegion
2837   _Jv_JNI_GetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2838                                             // GetLongArrayRegion
2839   _Jv_JNI_GetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2840                                             // GetFloatArrayRegion
2841   _Jv_JNI_GetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2842                                             // GetDoubleArrayRegion
2843   _Jv_JNI_SetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2844                                             // SetBooleanArrayRegion
2845   _Jv_JNI_SetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2846                                             // SetByteArrayRegion
2847   _Jv_JNI_SetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2848                                             // SetCharArrayRegion
2849   _Jv_JNI_SetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2850                                             // SetShortArrayRegion
2851   _Jv_JNI_SetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2852                                             // SetIntArrayRegion
2853   _Jv_JNI_SetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2854                                             // SetLongArrayRegion
2855   _Jv_JNI_SetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2856                                             // SetFloatArrayRegion
2857   _Jv_JNI_SetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2858                                             // SetDoubleArrayRegion
2859   _Jv_JNI_RegisterNatives,                  // RegisterNatives
2860   _Jv_JNI_UnregisterNatives,                // UnregisterNatives
2861   _Jv_JNI_MonitorEnter,                     // MonitorEnter
2862   _Jv_JNI_MonitorExit,                      // MonitorExit
2863   _Jv_JNI_GetJavaVM,                        // GetJavaVM
2864
2865   _Jv_JNI_GetStringRegion,                  // GetStringRegion
2866   _Jv_JNI_GetStringUTFRegion,               // GetStringUTFRegion
2867   _Jv_JNI_GetPrimitiveArrayCritical,        // GetPrimitiveArrayCritical
2868   _Jv_JNI_ReleasePrimitiveArrayCritical,    // ReleasePrimitiveArrayCritical
2869   _Jv_JNI_GetStringCritical,                // GetStringCritical
2870   _Jv_JNI_ReleaseStringCritical,            // ReleaseStringCritical
2871
2872   _Jv_JNI_NewWeakGlobalRef,                 // NewWeakGlobalRef
2873   _Jv_JNI_DeleteWeakGlobalRef,              // DeleteWeakGlobalRef
2874
2875   _Jv_JNI_ExceptionCheck,                   // ExceptionCheck
2876
2877   _Jv_JNI_NewDirectByteBuffer,              // NewDirectByteBuffer
2878   _Jv_JNI_GetDirectBufferAddress,           // GetDirectBufferAddress
2879   _Jv_JNI_GetDirectBufferCapacity           // GetDirectBufferCapacity
2880 };
2881
2882 struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
2883 {
2884   RESERVED,
2885   RESERVED,
2886   RESERVED,
2887
2888   _Jv_JNI_DestroyJavaVM,
2889   _Jv_JNI_AttachCurrentThread,
2890   _Jv_JNI_DetachCurrentThread,
2891   _Jv_JNI_GetEnv,
2892   _Jv_JNI_AttachCurrentThreadAsDaemon
2893 };