libjava/jni.cc

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