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oops - omitted from previouys delta
[official-gcc.git] / libjava / jni.cc
blobbe45cb231605559d42b167eed81fdb6161f9abe5
1 // jni.cc - JNI implementation, including the jump table.
2
3 /* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
4
5 This file is part of libgcj.
6
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
9 details. */
10
11 #include <config.h>
12
13 #include <stddef.h>
14 #include <string.h>
15
16 // Define this before including jni.h.
17 #define __GCJ_JNI_IMPL__
18
19 #include <gcj/cni.h>
20 #include <jvm.h>
21 #include <java-assert.h>
22 #include <jni.h>
23 #ifdef ENABLE_JVMPI
24 #include <jvmpi.h>
25 #endif
26
27 #include <java/lang/Class.h>
28 #include <java/lang/ClassLoader.h>
29 #include <java/lang/Throwable.h>
30 #include <java/lang/ArrayIndexOutOfBoundsException.h>
31 #include <java/lang/StringIndexOutOfBoundsException.h>
32 #include <java/lang/AbstractMethodError.h>
33 #include <java/lang/InstantiationException.h>
34 #include <java/lang/NoSuchFieldError.h>
35 #include <java/lang/NoSuchMethodError.h>
36 #include <java/lang/reflect/Constructor.h>
37 #include <java/lang/reflect/Method.h>
38 #include <java/lang/reflect/Modifier.h>
39 #include <java/lang/OutOfMemoryError.h>
40 #include <java/util/IdentityHashMap.h>
41 #include <java/lang/Integer.h>
42 #include <java/lang/ThreadGroup.h>
43 #include <java/lang/Thread.h>
44
45 #include <gcj/method.h>
46 #include <gcj/field.h>
47
48 #include <java-interp.h>
49 #include <java-threads.h>
50
51 // This enum is used to select different template instantiations in
52 // the invocation code.
53 enum invocation_type
54 {
55 normal,
56 nonvirtual,
57 static_type,
58 constructor
59 };
60
61 // Forward declarations.
62 extern struct JNINativeInterface _Jv_JNIFunctions;
63 extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
64
65 // Number of slots in the default frame. The VM must allow at least
66 // 16.
67 #define FRAME_SIZE 32
68
69 // Mark value indicating this is an overflow frame.
70 #define MARK_NONE 0
71 // Mark value indicating this is a user frame.
72 #define MARK_USER 1
73 // Mark value indicating this is a system frame.
74 #define MARK_SYSTEM 2
75
76 // This structure is used to keep track of local references.
77 struct _Jv_JNI_LocalFrame
78 {
79 // This is true if this frame object represents a pushed frame (eg
80 // from PushLocalFrame).
81 int marker : 2;
82
83 // Number of elements in frame.
84 int size : 30;
85
86 // Next frame in chain.
87 _Jv_JNI_LocalFrame *next;
88
89 // The elements. These are allocated using the C "struct hack".
90 jobject vec[0];
91 };
92
93 // This holds a reference count for all local references.
94 static java::util::IdentityHashMap *local_ref_table;
95 // This holds a reference count for all global references.
96 static java::util::IdentityHashMap *global_ref_table;
97
98 // The only VM.
99 static JavaVM *the_vm;
100
101 #ifdef ENABLE_JVMPI
102 // The only JVMPI interface description.
103 static JVMPI_Interface _Jv_JVMPI_Interface;
104
105 static jint
106 jvmpiEnableEvent (jint event_type, void *)
107 {
108 switch (event_type)
109 {
110 case JVMPI_EVENT_OBJECT_ALLOC:
111 _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
112 break;
113
114 case JVMPI_EVENT_THREAD_START:
115 _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
116 break;
117
118 case JVMPI_EVENT_THREAD_END:
119 _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
120 break;
121
122 default:
123 return JVMPI_NOT_AVAILABLE;
124 }
125
126 return JVMPI_SUCCESS;
127 }
128
129 static jint
130 jvmpiDisableEvent (jint event_type, void *)
131 {
132 switch (event_type)
133 {
134 case JVMPI_EVENT_OBJECT_ALLOC:
135 _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
136 break;
137
138 default:
139 return JVMPI_NOT_AVAILABLE;
140 }
141
142 return JVMPI_SUCCESS;
143 }
144 #endif
145
146 \f
147
148 void
149 _Jv_JNI_Init (void)
150 {
151 local_ref_table = new java::util::IdentityHashMap;
152 global_ref_table = new java::util::IdentityHashMap;
153
154 #ifdef ENABLE_JVMPI
155 _Jv_JVMPI_Interface.version = 1;
156 _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
157 _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
158 _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
159 _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
160 _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
161 #endif
162 }
163
164 // Tell the GC that a certain pointer is live.
165 static void
166 mark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
167 {
168 JvSynchronize sync (ref_table);
169
170 using namespace java::lang;
171 Integer *refcount = (Integer *) ref_table->get (obj);
172 jint val = (refcount == NULL) ? 0 : refcount->intValue ();
173 // FIXME: what about out of memory error?
174 ref_table->put (obj, new Integer (val + 1));
175 }
176
177 // Unmark a pointer.
178 static void
179 unmark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
180 {
181 JvSynchronize sync (ref_table);
182
183 using namespace java::lang;
184 Integer *refcount = (Integer *) ref_table->get (obj);
185 JvAssert (refcount);
186 jint val = refcount->intValue () - 1;
187 JvAssert (val >= 0);
188 if (val == 0)
189 ref_table->remove (obj);
190 else
191 // FIXME: what about out of memory error?
192 ref_table->put (obj, new Integer (val));
193 }
194
195 \f
196
197 static jobject
198 _Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
199 {
200 mark_for_gc (obj, global_ref_table);
201 return obj;
202 }
203
204 static void
205 _Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
206 {
207 unmark_for_gc (obj, global_ref_table);
208 }
209
210 static void
211 _Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
212 {
213 _Jv_JNI_LocalFrame *frame;
214
215 for (frame = env->locals; frame != NULL; frame = frame->next)
216 {
217 for (int i = 0; i < FRAME_SIZE; ++i)
218 {
219 if (frame->vec[i] == obj)
220 {
221 frame->vec[i] = NULL;
222 unmark_for_gc (obj, local_ref_table);
223 return;
224 }
225 }
226
227 // Don't go past a marked frame.
228 JvAssert (frame->marker == MARK_NONE);
229 }
230
231 JvAssert (0);
232 }
233
234 static jint
235 _Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
236 {
237 // It is easier to just always allocate a new frame of the requested
238 // size. This isn't the most efficient thing, but for now we don't
239 // care. Note that _Jv_JNI_PushLocalFrame relies on this right now.
240
241 _Jv_JNI_LocalFrame *frame;
242 try
243 {
244 frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
245 + size * sizeof (jobject));
246 }
247 catch (jthrowable t)
248 {
249 env->ex = t;
250 return JNI_ERR;
251 }
252
253 frame->marker = MARK_NONE;
254 frame->size = size;
255 memset (&frame->vec[0], 0, size * sizeof (jobject));
256 frame->next = env->locals;
257 env->locals = frame;
258
259 return 0;
260 }
261
262 static jint
263 _Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
264 {
265 jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
266 if (r < 0)
267 return r;
268
269 // The new frame is on top.
270 env->locals->marker = MARK_USER;
271
272 return 0;
273 }
274
275 static jobject
276 _Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
277 {
278 // Try to find an open slot somewhere in the topmost frame.
279 _Jv_JNI_LocalFrame *frame = env->locals;
280 bool done = false, set = false;
281 for (; frame != NULL && ! done; frame = frame->next)
282 {
283 for (int i = 0; i < frame->size; ++i)
284 {
285 if (frame->vec[i] == NULL)
286 {
287 set = true;
288 done = true;
289 frame->vec[i] = obj;
290 break;
291 }
292 }
293
294 // If we found a slot, or if the frame we just searched is the
295 // mark frame, then we are done.
296 if (done || frame->marker != MARK_NONE)
297 break;
298 }
299
300 if (! set)
301 {
302 // No slots, so we allocate a new frame. According to the spec
303 // we could just die here. FIXME: return value.
304 _Jv_JNI_EnsureLocalCapacity (env, 16);
305 // We know the first element of the new frame will be ok.
306 env->locals->vec[0] = obj;
307 }
308
309 mark_for_gc (obj, local_ref_table);
310 return obj;
311 }
312
313 static jobject
314 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result, int stop)
315 {
316 _Jv_JNI_LocalFrame *rf = env->locals;
317
318 bool done = false;
319 while (rf != NULL && ! done)
320 {
321 for (int i = 0; i < rf->size; ++i)
322 if (rf->vec[i] != NULL)
323 unmark_for_gc (rf->vec[i], local_ref_table);
324
325 // If the frame we just freed is the marker frame, we are done.
326 done = (rf->marker == stop);
327
328 _Jv_JNI_LocalFrame *n = rf->next;
329 // When N==NULL, we've reached the stack-allocated frame, and we
330 // must not free it. However, we must be sure to clear all its
331 // elements, since we might conceivably reuse it.
332 if (n == NULL)
333 {
334 memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
335 break;
336 }
337
338 _Jv_Free (rf);
339 rf = n;
340 }
341
342 // Update the local frame information.
343 env->locals = rf;
344
345 return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
346 }
347
348 static jobject
349 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
350 {
351 return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
352 }
353
354 // Pop a `system' frame from the stack. This is `extern "C"' as it is
355 // used by the compiler.
356 extern "C" void
357 _Jv_JNI_PopSystemFrame (JNIEnv *env)
358 {
359 _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
360
361 if (env->ex)
362 {
363 jthrowable t = env->ex;
364 env->ex = NULL;
365 throw t;
366 }
367 }
368
369 // This function is used from other template functions. It wraps the
370 // return value appropriately; we specialize it so that object returns
371 // are turned into local references.
372 template<typename T>
373 static T
374 wrap_value (JNIEnv *, T value)
375 {
376 return value;
377 }
378
379 // This specialization is used for jobject, jclass, jstring, jarray,
380 // etc.
381 template<typename T>
382 static T *
383 wrap_value (JNIEnv *env, T *value)
384 {
385 return (value == NULL
386 ? value
387 : (T *) _Jv_JNI_NewLocalRef (env, (jobject) value));
388 }
389
390 \f
391
392 static jint
393 _Jv_JNI_GetVersion (JNIEnv *)
394 {
395 return JNI_VERSION_1_2;
396 }
397
398 static jclass
399 _Jv_JNI_DefineClass (JNIEnv *env, jobject loader,
400 const jbyte *buf, jsize bufLen)
401 {
402 try
403 {
404 jbyteArray bytes = JvNewByteArray (bufLen);
405
406 jbyte *elts = elements (bytes);
407 memcpy (elts, buf, bufLen * sizeof (jbyte));
408
409 java::lang::ClassLoader *l
410 = reinterpret_cast<java::lang::ClassLoader *> (loader);
411
412 jclass result = l->defineClass (bytes, 0, bufLen);
413 return (jclass) wrap_value (env, result);
414 }
415 catch (jthrowable t)
416 {
417 env->ex = t;
418 return NULL;
419 }
420 }
421
422 static jclass
423 _Jv_JNI_FindClass (JNIEnv *env, const char *name)
424 {
425 // FIXME: assume that NAME isn't too long.
426 int len = strlen (name);
427 char s[len + 1];
428 for (int i = 0; i <= len; ++i)
429 s[i] = (name[i] == '/') ? '.' : name[i];
430
431 jclass r = NULL;
432 try
433 {
434 // This might throw an out of memory exception.
435 jstring n = JvNewStringUTF (s);
436
437 java::lang::ClassLoader *loader = NULL;
438 if (env->klass != NULL)
439 loader = env->klass->getClassLoader ();
440
441 if (loader == NULL)
442 {
443 // FIXME: should use getBaseClassLoader, but we don't have that
444 // yet.
445 loader = java::lang::ClassLoader::getSystemClassLoader ();
446 }
447
448 r = loader->loadClass (n);
449 }
450 catch (jthrowable t)
451 {
452 env->ex = t;
453 }
454
455 return (jclass) wrap_value (env, r);
456 }
457
458 static jclass
459 _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
460 {
461 return (jclass) wrap_value (env, clazz->getSuperclass ());
462 }
463
464 static jboolean
465 _Jv_JNI_IsAssignableFrom(JNIEnv *, jclass clazz1, jclass clazz2)
466 {
467 return clazz1->isAssignableFrom (clazz2);
468 }
469
470 static jint
471 _Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
472 {
473 // We check in case the user did some funky cast.
474 JvAssert (obj != NULL && java::lang::Throwable::class$.isInstance (obj));
475 env->ex = obj;
476 return 0;
477 }
478
479 static jint
480 _Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
481 {
482 using namespace java::lang::reflect;
483
484 JvAssert (java::lang::Throwable::class$.isAssignableFrom (clazz));
485
486 int r = JNI_OK;
487 try
488 {
489 JArray<jclass> *argtypes
490 = (JArray<jclass> *) JvNewObjectArray (1, &java::lang::Class::class$,
491 NULL);
492
493 jclass *elts = elements (argtypes);
494 elts[0] = &StringClass;
495
496 Constructor *cons = clazz->getConstructor (argtypes);
497
498 jobjectArray values = JvNewObjectArray (1, &StringClass, NULL);
499 jobject *velts = elements (values);
500 velts[0] = JvNewStringUTF (message);
501
502 jobject obj = cons->newInstance (values);
503
504 env->ex = reinterpret_cast<jthrowable> (obj);
505 }
506 catch (jthrowable t)
507 {
508 env->ex = t;
509 r = JNI_ERR;
510 }
511
512 return r;
513 }
514
515 static jthrowable
516 _Jv_JNI_ExceptionOccurred (JNIEnv *env)
517 {
518 return (jthrowable) wrap_value (env, env->ex);
519 }
520
521 static void
522 _Jv_JNI_ExceptionDescribe (JNIEnv *env)
523 {
524 if (env->ex != NULL)
525 env->ex->printStackTrace();
526 }
527
528 static void
529 _Jv_JNI_ExceptionClear (JNIEnv *env)
530 {
531 env->ex = NULL;
532 }
533
534 static jboolean
535 _Jv_JNI_ExceptionCheck (JNIEnv *env)
536 {
537 return env->ex != NULL;
538 }
539
540 static void
541 _Jv_JNI_FatalError (JNIEnv *, const char *message)
542 {
543 JvFail (message);
544 }
545
546 \f
547
548 static jboolean
549 _Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
550 {
551 return obj1 == obj2;
552 }
553
554 static jobject
555 _Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
556 {
557 jobject obj = NULL;
558 using namespace java::lang::reflect;
559
560 try
561 {
562 JvAssert (clazz && ! clazz->isArray ());
563 if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
564 env->ex = new java::lang::InstantiationException ();
565 else
566 {
567 // FIXME: will this work for String?
568 obj = JvAllocObject (clazz);
569 }
570 }
571 catch (jthrowable t)
572 {
573 env->ex = t;
574 }
575
576 return wrap_value (env, obj);
577 }
578
579 static jclass
580 _Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
581 {
582 JvAssert (obj);
583 return (jclass) wrap_value (env, obj->getClass());
584 }
585
586 static jboolean
587 _Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
588 {
589 return clazz->isInstance(obj);
590 }
591
592 \f
593
594 //
595 // This section concerns method invocation.
596 //
597
598 template<jboolean is_static>
599 static jmethodID
600 _Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
601 const char *name, const char *sig)
602 {
603 try
604 {
605 _Jv_InitClass (clazz);
606
607 _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
608
609 // FIXME: assume that SIG isn't too long.
610 int len = strlen (sig);
611 char s[len + 1];
612 for (int i = 0; i <= len; ++i)
613 s[i] = (sig[i] == '/') ? '.' : sig[i];
614 _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
615
616 JvAssert (! clazz->isPrimitive());
617
618 using namespace java::lang::reflect;
619
620 while (clazz != NULL)
621 {
622 jint count = JvNumMethods (clazz);
623 jmethodID meth = JvGetFirstMethod (clazz);
624
625 for (jint i = 0; i < count; ++i)
626 {
627 if (((is_static && Modifier::isStatic (meth->accflags))
628 || (! is_static && ! Modifier::isStatic (meth->accflags)))
629 && _Jv_equalUtf8Consts (meth->name, name_u)
630 && _Jv_equalUtf8Consts (meth->signature, sig_u))
631 return meth;
632
633 meth = meth->getNextMethod();
634 }
635
636 clazz = clazz->getSuperclass ();
637 }
638
639 env->ex = new java::lang::NoSuchMethodError ();
640 }
641 catch (jthrowable t)
642 {
643 env->ex = t;
644 }
645
646 return NULL;
647 }
648
649 // This is a helper function which turns a va_list into an array of
650 // `jvalue's. It needs signature information in order to do its work.
651 // The array of values must already be allocated.
652 static void
653 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
654 {
655 jclass *arg_elts = elements (arg_types);
656 for (int i = 0; i < arg_types->length; ++i)
657 {
658 if (arg_elts[i] == JvPrimClass (byte))
659 values[i].b = va_arg (vargs, jbyte);
660 else if (arg_elts[i] == JvPrimClass (short))
661 values[i].s = va_arg (vargs, jshort);
662 else if (arg_elts[i] == JvPrimClass (int))
663 values[i].i = va_arg (vargs, jint);
664 else if (arg_elts[i] == JvPrimClass (long))
665 values[i].j = va_arg (vargs, jlong);
666 else if (arg_elts[i] == JvPrimClass (float))
667 values[i].f = va_arg (vargs, jfloat);
668 else if (arg_elts[i] == JvPrimClass (double))
669 values[i].d = va_arg (vargs, jdouble);
670 else if (arg_elts[i] == JvPrimClass (boolean))
671 values[i].z = va_arg (vargs, jboolean);
672 else if (arg_elts[i] == JvPrimClass (char))
673 values[i].c = va_arg (vargs, jchar);
674 else
675 {
676 // An object.
677 values[i].l = va_arg (vargs, jobject);
678 }
679 }
680 }
681
682 // This can call any sort of method: virtual, "nonvirtual", static, or
683 // constructor.
684 template<typename T, invocation_type style>
685 static T
686 _Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
687 jmethodID id, va_list vargs)
688 {
689 if (style == normal)
690 id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
691
692 jclass decl_class = klass ? klass : obj->getClass ();
693 JvAssert (decl_class != NULL);
694
695 jclass return_type;
696 JArray<jclass> *arg_types;
697
698 try
699 {
700 _Jv_GetTypesFromSignature (id, decl_class,
701 &arg_types, &return_type);
702
703 jvalue args[arg_types->length];
704 array_from_valist (args, arg_types, vargs);
705
706 // For constructors we need to pass the Class we are instantiating.
707 if (style == constructor)
708 return_type = klass;
709
710 jvalue result;
711 jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
712 style == constructor,
713 arg_types, args, &result);
714
715 if (ex != NULL)
716 env->ex = ex;
717
718 // We cheat a little here. FIXME.
719 return wrap_value (env, * (T *) &result);
720 }
721 catch (jthrowable t)
722 {
723 env->ex = t;
724 }
725
726 return wrap_value (env, (T) 0);
727 }
728
729 template<typename T, invocation_type style>
730 static T
731 _Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
732 jmethodID method, ...)
733 {
734 va_list args;
735 T result;
736
737 va_start (args, method);
738 result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
739 va_end (args);
740
741 return result;
742 }
743
744 template<typename T, invocation_type style>
745 static T
746 _Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
747 jmethodID id, jvalue *args)
748 {
749 if (style == normal)
750 id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
751
752 jclass decl_class = klass ? klass : obj->getClass ();
753 JvAssert (decl_class != NULL);
754
755 jclass return_type;
756 JArray<jclass> *arg_types;
757 try
758 {
759 _Jv_GetTypesFromSignature (id, decl_class,
760 &arg_types, &return_type);
761
762 // For constructors we need to pass the Class we are instantiating.
763 if (style == constructor)
764 return_type = klass;
765
766 jvalue result;
767 jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
768 style == constructor,
769 arg_types, args, &result);
770
771 if (ex != NULL)
772 env->ex = ex;
773
774 // We cheat a little here. FIXME.
775 return wrap_value (env, * (T *) &result);
776 }
777 catch (jthrowable t)
778 {
779 env->ex = t;
780 }
781
782 return wrap_value (env, (T) 0);
783 }
784
785 template<invocation_type style>
786 static void
787 _Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
788 jmethodID id, va_list vargs)
789 {
790 if (style == normal)
791 id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
792
793 jclass decl_class = klass ? klass : obj->getClass ();
794 JvAssert (decl_class != NULL);
795
796 jclass return_type;
797 JArray<jclass> *arg_types;
798 try
799 {
800 _Jv_GetTypesFromSignature (id, decl_class,
801 &arg_types, &return_type);
802
803 jvalue args[arg_types->length];
804 array_from_valist (args, arg_types, vargs);
805
806 // For constructors we need to pass the Class we are instantiating.
807 if (style == constructor)
808 return_type = klass;
809
810 jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
811 style == constructor,
812 arg_types, args, NULL);
813
814 if (ex != NULL)
815 env->ex = ex;
816 }
817 catch (jthrowable t)
818 {
819 env->ex = t;
820 }
821 }
822
823 template<invocation_type style>
824 static void
825 _Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
826 jmethodID method, ...)
827 {
828 va_list args;
829
830 va_start (args, method);
831 _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
832 va_end (args);
833 }
834
835 template<invocation_type style>
836 static void
837 _Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
838 jmethodID id, jvalue *args)
839 {
840 if (style == normal)
841 id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
842
843 jclass decl_class = klass ? klass : obj->getClass ();
844 JvAssert (decl_class != NULL);
845
846 jclass return_type;
847 JArray<jclass> *arg_types;
848 try
849 {
850 _Jv_GetTypesFromSignature (id, decl_class,
851 &arg_types, &return_type);
852
853 jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
854 style == constructor,
855 arg_types, args, NULL);
856
857 if (ex != NULL)
858 env->ex = ex;
859 }
860 catch (jthrowable t)
861 {
862 env->ex = t;
863 }
864 }
865
866 // Functions with this signature are used to implement functions in
867 // the CallMethod family.
868 template<typename T>
869 static T
870 _Jv_JNI_CallMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
871 {
872 return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
873 }
874
875 // Functions with this signature are used to implement functions in
876 // the CallMethod family.
877 template<typename T>
878 static T
879 _Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
880 {
881 va_list args;
882 T result;
883
884 va_start (args, id);
885 result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
886 va_end (args);
887
888 return result;
889 }
890
891 // Functions with this signature are used to implement functions in
892 // the CallMethod family.
893 template<typename T>
894 static T
895 _Jv_JNI_CallMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
896 {
897 return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
898 }
899
900 static void
901 _Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
902 {
903 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
904 }
905
906 static void
907 _Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
908 {
909 va_list args;
910
911 va_start (args, id);
912 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
913 va_end (args);
914 }
915
916 static void
917 _Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
918 {
919 _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
920 }
921
922 // Functions with this signature are used to implement functions in
923 // the CallStaticMethod family.
924 template<typename T>
925 static T
926 _Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
927 jmethodID id, va_list args)
928 {
929 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
930 JvAssert (java::lang::Class::class$.isInstance (klass));
931
932 return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
933 }
934
935 // Functions with this signature are used to implement functions in
936 // the CallStaticMethod family.
937 template<typename T>
938 static T
939 _Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
940 {
941 va_list args;
942 T result;
943
944 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
945 JvAssert (java::lang::Class::class$.isInstance (klass));
946
947 va_start (args, id);
948 result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
949 id, args);
950 va_end (args);
951
952 return result;
953 }
954
955 // Functions with this signature are used to implement functions in
956 // the CallStaticMethod family.
957 template<typename T>
958 static T
959 _Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
960 jvalue *args)
961 {
962 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
963 JvAssert (java::lang::Class::class$.isInstance (klass));
964
965 return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
966 }
967
968 static void
969 _Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass, jmethodID id,
970 va_list args)
971 {
972 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
973 }
974
975 static void
976 _Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
977 {
978 va_list args;
979
980 va_start (args, id);
981 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
982 va_end (args);
983 }
984
985 static void
986 _Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass, jmethodID id,
987 jvalue *args)
988 {
989 _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
990 }
991
992 static jobject
993 _Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
994 jmethodID id, va_list args)
995 {
996 JvAssert (klass && ! klass->isArray ());
997 JvAssert (! strcmp (id->name->data, "<init>")
998 && id->signature->length > 2
999 && id->signature->data[0] == '('
1000 && ! strcmp (&id->signature->data[id->signature->length - 2],
1001 ")V"));
1002
1003 return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1004 id, args);
1005 }
1006
1007 static jobject
1008 _Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
1009 {
1010 JvAssert (klass && ! klass->isArray ());
1011 JvAssert (! strcmp (id->name->data, "<init>")
1012 && id->signature->length > 2
1013 && id->signature->data[0] == '('
1014 && ! strcmp (&id->signature->data[id->signature->length - 2],
1015 ")V"));
1016
1017 va_list args;
1018 jobject result;
1019
1020 va_start (args, id);
1021 result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1022 id, args);
1023 va_end (args);
1024
1025 return result;
1026 }
1027
1028 static jobject
1029 _Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
1030 jvalue *args)
1031 {
1032 JvAssert (klass && ! klass->isArray ());
1033 JvAssert (! strcmp (id->name->data, "<init>")
1034 && id->signature->length > 2
1035 && id->signature->data[0] == '('
1036 && ! strcmp (&id->signature->data[id->signature->length - 2],
1037 ")V"));
1038
1039 return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1040 id, args);
1041 }
1042
1043 \f
1044
1045 template<typename T>
1046 static T
1047 _Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
1048 {
1049 JvAssert (obj);
1050 T *ptr = (T *) ((char *) obj + field->getOffset ());
1051 return wrap_value (env, *ptr);
1052 }
1053
1054 template<typename T>
1055 static void
1056 _Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
1057 {
1058 JvAssert (obj);
1059 T *ptr = (T *) ((char *) obj + field->getOffset ());
1060 *ptr = value;
1061 }
1062
1063 template<jboolean is_static>
1064 static jfieldID
1065 _Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
1066 const char *name, const char *sig)
1067 {
1068 try
1069 {
1070 _Jv_InitClass (clazz);
1071
1072 _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1073
1074 // FIXME: assume that SIG isn't too long.
1075 int len = strlen (sig);
1076 char s[len + 1];
1077 for (int i = 0; i <= len; ++i)
1078 s[i] = (sig[i] == '/') ? '.' : sig[i];
1079 jclass field_class = _Jv_FindClassFromSignature ((char *) s, NULL);
1080
1081 // FIXME: what if field_class == NULL?
1082
1083 java::lang::ClassLoader *loader = clazz->getClassLoader ();
1084 while (clazz != NULL)
1085 {
1086 // We acquire the class lock so that fields aren't resolved
1087 // while we are running.
1088 JvSynchronize sync (clazz);
1089
1090 jint count = (is_static
1091 ? JvNumStaticFields (clazz)
1092 : JvNumInstanceFields (clazz));
1093 jfieldID field = (is_static
1094 ? JvGetFirstStaticField (clazz)
1095 : JvGetFirstInstanceField (clazz));
1096 for (jint i = 0; i < count; ++i)
1097 {
1098 _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1099
1100 // The field might be resolved or it might not be. It
1101 // is much simpler to always resolve it.
1102 _Jv_ResolveField (field, loader);
1103 if (_Jv_equalUtf8Consts (f_name, a_name)
1104 && field->getClass() == field_class)
1105 return field;
1106
1107 field = field->getNextField ();
1108 }
1109
1110 clazz = clazz->getSuperclass ();
1111 }
1112
1113 env->ex = new java::lang::NoSuchFieldError ();
1114 }
1115 catch (jthrowable t)
1116 {
1117 env->ex = t;
1118 }
1119 return NULL;
1120 }
1121
1122 template<typename T>
1123 static T
1124 _Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
1125 {
1126 T *ptr = (T *) field->u.addr;
1127 return wrap_value (env, *ptr);
1128 }
1129
1130 template<typename T>
1131 static void
1132 _Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
1133 {
1134 T *ptr = (T *) field->u.addr;
1135 *ptr = value;
1136 }
1137
1138 static jstring
1139 _Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
1140 {
1141 try
1142 {
1143 jstring r = _Jv_NewString (unichars, len);
1144 return (jstring) wrap_value (env, r);
1145 }
1146 catch (jthrowable t)
1147 {
1148 env->ex = t;
1149 return NULL;
1150 }
1151 }
1152
1153 static jsize
1154 _Jv_JNI_GetStringLength (JNIEnv *, jstring string)
1155 {
1156 return string->length();
1157 }
1158
1159 static const jchar *
1160 _Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
1161 {
1162 jchar *result = _Jv_GetStringChars (string);
1163 mark_for_gc (string, global_ref_table);
1164 if (isCopy)
1165 *isCopy = false;
1166 return (const jchar *) result;
1167 }
1168
1169 static void
1170 _Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
1171 {
1172 unmark_for_gc (string, global_ref_table);
1173 }
1174
1175 static jstring
1176 _Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
1177 {
1178 try
1179 {
1180 jstring result = JvNewStringUTF (bytes);
1181 return (jstring) wrap_value (env, result);
1182 }
1183 catch (jthrowable t)
1184 {
1185 env->ex = t;
1186 return NULL;
1187 }
1188 }
1189
1190 static jsize
1191 _Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
1192 {
1193 return JvGetStringUTFLength (string);
1194 }
1195
1196 static const char *
1197 _Jv_JNI_GetStringUTFChars (JNIEnv *env, jstring string, jboolean *isCopy)
1198 {
1199 jsize len = JvGetStringUTFLength (string);
1200 try
1201 {
1202 char *r = (char *) _Jv_Malloc (len + 1);
1203 JvGetStringUTFRegion (string, 0, len, r);
1204 r[len] = '\0';
1205
1206 if (isCopy)
1207 *isCopy = true;
1208
1209 return (const char *) r;
1210 }
1211 catch (jthrowable t)
1212 {
1213 env->ex = t;
1214 return NULL;
1215 }
1216 }
1217
1218 static void
1219 _Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
1220 {
1221 _Jv_Free ((void *) utf);
1222 }
1223
1224 static void
1225 _Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start, jsize len,
1226 jchar *buf)
1227 {
1228 jchar *result = _Jv_GetStringChars (string);
1229 if (start < 0 || start > string->length ()
1230 || len < 0 || start + len > string->length ())
1231 {
1232 try
1233 {
1234 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1235 }
1236 catch (jthrowable t)
1237 {
1238 env->ex = t;
1239 }
1240 }
1241 else
1242 memcpy (buf, &result[start], len * sizeof (jchar));
1243 }
1244
1245 static void
1246 _Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
1247 jsize len, char *buf)
1248 {
1249 if (start < 0 || start > str->length ()
1250 || len < 0 || start + len > str->length ())
1251 {
1252 try
1253 {
1254 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1255 }
1256 catch (jthrowable t)
1257 {
1258 env->ex = t;
1259 }
1260 }
1261 else
1262 _Jv_GetStringUTFRegion (str, start, len, buf);
1263 }
1264
1265 static const jchar *
1266 _Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
1267 {
1268 jchar *result = _Jv_GetStringChars (str);
1269 if (isCopy)
1270 *isCopy = false;
1271 return result;
1272 }
1273
1274 static void
1275 _Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
1276 {
1277 // Nothing.
1278 }
1279
1280 static jsize
1281 _Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
1282 {
1283 return array->length;
1284 }
1285
1286 static jarray
1287 _Jv_JNI_NewObjectArray (JNIEnv *env, jsize length, jclass elementClass,
1288 jobject init)
1289 {
1290 try
1291 {
1292 jarray result = JvNewObjectArray (length, elementClass, init);
1293 return (jarray) wrap_value (env, result);
1294 }
1295 catch (jthrowable t)
1296 {
1297 env->ex = t;
1298 return NULL;
1299 }
1300 }
1301
1302 static jobject
1303 _Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array, jsize index)
1304 {
1305 jobject *elts = elements (array);
1306 return wrap_value (env, elts[index]);
1307 }
1308
1309 static void
1310 _Jv_JNI_SetObjectArrayElement (JNIEnv *env, jobjectArray array, jsize index,
1311 jobject value)
1312 {
1313 try
1314 {
1315 _Jv_CheckArrayStore (array, value);
1316 jobject *elts = elements (array);
1317 elts[index] = value;
1318 }
1319 catch (jthrowable t)
1320 {
1321 env->ex = t;
1322 }
1323 }
1324
1325 template<typename T, jclass K>
1326 static JArray<T> *
1327 _Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
1328 {
1329 try
1330 {
1331 return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1332 }
1333 catch (jthrowable t)
1334 {
1335 env->ex = t;
1336 return NULL;
1337 }
1338 }
1339
1340 template<typename T>
1341 static T *
1342 _Jv_JNI_GetPrimitiveArrayElements (JNIEnv *, JArray<T> *array,
1343 jboolean *isCopy)
1344 {
1345 T *elts = elements (array);
1346 if (isCopy)
1347 {
1348 // We elect never to copy.
1349 *isCopy = false;
1350 }
1351 mark_for_gc (array, global_ref_table);
1352 return elts;
1353 }
1354
1355 template<typename T>
1356 static void
1357 _Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *, JArray<T> *array,
1358 T *, jint /* mode */)
1359 {
1360 // Note that we ignore MODE. We can do this because we never copy
1361 // the array elements. My reading of the JNI documentation is that
1362 // this is an option for the implementor.
1363 unmark_for_gc (array, global_ref_table);
1364 }
1365
1366 template<typename T>
1367 static void
1368 _Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1369 jsize start, jsize len,
1370 T *buf)
1371 {
1372 // The cast to unsigned lets us save a comparison.
1373 if (start < 0 || len < 0
1374 || (unsigned long) (start + len) > (unsigned long) array->length)
1375 {
1376 try
1377 {
1378 // FIXME: index.
1379 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1380 }
1381 catch (jthrowable t)
1382 {
1383 // Could have thown out of memory error.
1384 env->ex = t;
1385 }
1386 }
1387 else
1388 {
1389 T *elts = elements (array) + start;
1390 memcpy (buf, elts, len * sizeof (T));
1391 }
1392 }
1393
1394 template<typename T>
1395 static void
1396 _Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1397 jsize start, jsize len, T *buf)
1398 {
1399 // The cast to unsigned lets us save a comparison.
1400 if (start < 0 || len < 0
1401 || (unsigned long) (start + len) > (unsigned long) array->length)
1402 {
1403 try
1404 {
1405 // FIXME: index.
1406 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1407 }
1408 catch (jthrowable t)
1409 {
1410 env->ex = t;
1411 }
1412 }
1413 else
1414 {
1415 T *elts = elements (array) + start;
1416 memcpy (elts, buf, len * sizeof (T));
1417 }
1418 }
1419
1420 static void *
1421 _Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
1422 jboolean *isCopy)
1423 {
1424 // FIXME: does this work?
1425 jclass klass = array->getClass()->getComponentType();
1426 JvAssert (klass->isPrimitive ());
1427 char *r = _Jv_GetArrayElementFromElementType (array, klass);
1428 if (isCopy)
1429 *isCopy = false;
1430 return r;
1431 }
1432
1433 static void
1434 _Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
1435 {
1436 // Nothing.
1437 }
1438
1439 static jint
1440 _Jv_JNI_MonitorEnter (JNIEnv *env, jobject obj)
1441 {
1442 try
1443 {
1444 _Jv_MonitorEnter (obj);
1445 return 0;
1446 }
1447 catch (jthrowable t)
1448 {
1449 env->ex = t;
1450 }
1451 return JNI_ERR;
1452 }
1453
1454 static jint
1455 _Jv_JNI_MonitorExit (JNIEnv *env, jobject obj)
1456 {
1457 try
1458 {
1459 _Jv_MonitorExit (obj);
1460 return 0;
1461 }
1462 catch (jthrowable t)
1463 {
1464 env->ex = t;
1465 }
1466 return JNI_ERR;
1467 }
1468
1469 // JDK 1.2
1470 jobject
1471 _Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
1472 jboolean)
1473 {
1474 try
1475 {
1476 java::lang::reflect::Field *field = new java::lang::reflect::Field();
1477 field->declaringClass = cls;
1478 field->offset = (char*) fieldID - (char *) cls->fields;
1479 field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1480 return wrap_value (env, field);
1481 }
1482 catch (jthrowable t)
1483 {
1484 env->ex = t;
1485 }
1486 return NULL;
1487 }
1488
1489 // JDK 1.2
1490 static jfieldID
1491 _Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
1492 {
1493 using namespace java::lang::reflect;
1494
1495 Field *field = reinterpret_cast<Field *> (f);
1496 return _Jv_FromReflectedField (field);
1497 }
1498
1499 jobject
1500 _Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
1501 jboolean)
1502 {
1503 using namespace java::lang::reflect;
1504
1505 // FIXME.
1506 static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
1507
1508 jobject result = NULL;
1509
1510 try
1511 {
1512 if (_Jv_equalUtf8Consts (id->name, init_name))
1513 {
1514 // A constructor.
1515 Constructor *cons = new Constructor ();
1516 cons->offset = (char *) id - (char *) &klass->methods;
1517 cons->declaringClass = klass;
1518 result = cons;
1519 }
1520 else
1521 {
1522 Method *meth = new Method ();
1523 meth->offset = (char *) id - (char *) &klass->methods;
1524 meth->declaringClass = klass;
1525 result = meth;
1526 }
1527 }
1528 catch (jthrowable t)
1529 {
1530 env->ex = t;
1531 }
1532
1533 return wrap_value (env, result);
1534 }
1535
1536 static jmethodID
1537 _Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
1538 {
1539 using namespace java::lang::reflect;
1540 if (Method::class$.isInstance (method))
1541 return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1542 return
1543 _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1544 }
1545
1546 \f
1547
1548 // Hash table of native methods.
1549 static JNINativeMethod *nathash;
1550 // Number of slots used.
1551 static int nathash_count = 0;
1552 // Number of slots available. Must be power of 2.
1553 static int nathash_size = 0;
1554
1555 #define DELETED_ENTRY ((char *) (~0))
1556
1557 // Compute a hash value for a native method descriptor.
1558 static int
1559 hash (const JNINativeMethod *method)
1560 {
1561 char *ptr;
1562 int hash = 0;
1563
1564 ptr = method->name;
1565 while (*ptr)
1566 hash = (31 * hash) + *ptr++;
1567
1568 ptr = method->signature;
1569 while (*ptr)
1570 hash = (31 * hash) + *ptr++;
1571
1572 return hash;
1573 }
1574
1575 // Find the slot where a native method goes.
1576 static JNINativeMethod *
1577 nathash_find_slot (const JNINativeMethod *method)
1578 {
1579 jint h = hash (method);
1580 int step = (h ^ (h >> 16)) | 1;
1581 int w = h & (nathash_size - 1);
1582 int del = -1;
1583
1584 for (;;)
1585 {
1586 JNINativeMethod *slotp = &nathash[w];
1587 if (slotp->name == NULL)
1588 {
1589 if (del >= 0)
1590 return &nathash[del];
1591 else
1592 return slotp;
1593 }
1594 else if (slotp->name == DELETED_ENTRY)
1595 del = w;
1596 else if (! strcmp (slotp->name, method->name)
1597 && ! strcmp (slotp->signature, method->signature))
1598 return slotp;
1599 w = (w + step) & (nathash_size - 1);
1600 }
1601 }
1602
1603 // Find a method. Return NULL if it isn't in the hash table.
1604 static void *
1605 nathash_find (JNINativeMethod *method)
1606 {
1607 if (nathash == NULL)
1608 return NULL;
1609 JNINativeMethod *slot = nathash_find_slot (method);
1610 if (slot->name == NULL || slot->name == DELETED_ENTRY)
1611 return NULL;
1612 return slot->fnPtr;
1613 }
1614
1615 static void
1616 natrehash ()
1617 {
1618 if (nathash == NULL)
1619 {
1620 nathash_size = 1024;
1621 nathash =
1622 (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1623 * sizeof (JNINativeMethod));
1624 memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1625 }
1626 else
1627 {
1628 int savesize = nathash_size;
1629 JNINativeMethod *savehash = nathash;
1630 nathash_size *= 2;
1631 nathash =
1632 (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1633 * sizeof (JNINativeMethod));
1634 memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1635
1636 for (int i = 0; i < savesize; ++i)
1637 {
1638 if (savehash[i].name != NULL && savehash[i].name != DELETED_ENTRY)
1639 {
1640 JNINativeMethod *slot = nathash_find_slot (&savehash[i]);
1641 *slot = savehash[i];
1642 }
1643 }
1644 }
1645 }
1646
1647 static void
1648 nathash_add (const JNINativeMethod *method)
1649 {
1650 if (3 * nathash_count >= 2 * nathash_size)
1651 natrehash ();
1652 JNINativeMethod *slot = nathash_find_slot (method);
1653 // If the slot has a real entry in it, then there is no work to do.
1654 if (slot->name != NULL && slot->name != DELETED_ENTRY)
1655 return;
1656 // FIXME
1657 slot->name = strdup (method->name);
1658 slot->signature = strdup (method->signature);
1659 slot->fnPtr = method->fnPtr;
1660 }
1661
1662 static jint
1663 _Jv_JNI_RegisterNatives (JNIEnv *env, jclass klass,
1664 const JNINativeMethod *methods,
1665 jint nMethods)
1666 {
1667 // Synchronize while we do the work. This must match
1668 // synchronization in some other functions that manipulate or use
1669 // the nathash table.
1670 JvSynchronize sync (global_ref_table);
1671
1672 // Look at each descriptor given us, and find the corresponding
1673 // method in the class.
1674 for (int j = 0; j < nMethods; ++j)
1675 {
1676 bool found = false;
1677
1678 _Jv_Method *imeths = JvGetFirstMethod (klass);
1679 for (int i = 0; i < JvNumMethods (klass); ++i)
1680 {
1681 _Jv_Method *self = &imeths[i];
1682
1683 if (! strcmp (self->name->data, methods[j].name)
1684 && ! strcmp (self->signature->data, methods[j].signature))
1685 {
1686 if (! (self->accflags
1687 & java::lang::reflect::Modifier::NATIVE))
1688 break;
1689
1690 // Found a match that is native.
1691 found = true;
1692 nathash_add (&methods[j]);
1693
1694 break;
1695 }
1696 }
1697
1698 if (! found)
1699 {
1700 jstring m = JvNewStringUTF (methods[j].name);
1701 try
1702 {
1703 env->ex =new java::lang::NoSuchMethodError (m);
1704 }
1705 catch (jthrowable t)
1706 {
1707 env->ex = t;
1708 }
1709 return JNI_ERR;
1710 }
1711 }
1712
1713 return JNI_OK;
1714 }
1715
1716 static jint
1717 _Jv_JNI_UnregisterNatives (JNIEnv *, jclass)
1718 {
1719 // FIXME -- we could implement this.
1720 return JNI_ERR;
1721 }
1722
1723 \f
1724
1725 // Add a character to the buffer, encoding properly.
1726 static void
1727 add_char (char *buf, jchar c, int *here)
1728 {
1729 if (c == '_')
1730 {
1731 buf[(*here)++] = '_';
1732 buf[(*here)++] = '1';
1733 }
1734 else if (c == ';')
1735 {
1736 buf[(*here)++] = '_';
1737 buf[(*here)++] = '2';
1738 }
1739 else if (c == '[')
1740 {
1741 buf[(*here)++] = '_';
1742 buf[(*here)++] = '3';
1743 }
1744
1745 // Also check for `.' here because we might be passed an internal
1746 // qualified class name like `foo.bar'.
1747 else if (c == '/' || c == '.')
1748 buf[(*here)++] = '_';
1749 else if ((c >= '0' && c <= '9')
1750 || (c >= 'a' && c <= 'z')
1751 || (c >= 'A' && c <= 'Z'))
1752 buf[(*here)++] = (char) c;
1753 else
1754 {
1755 // "Unicode" character.
1756 buf[(*here)++] = '_';
1757 buf[(*here)++] = '0';
1758 for (int i = 0; i < 4; ++i)
1759 {
1760 int val = c & 0x0f;
1761 buf[(*here) + 3 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
1762 c >>= 4;
1763 }
1764 *here += 4;
1765 }
1766 }
1767
1768 // Compute a mangled name for a native function. This computes the
1769 // long name, and also returns an index which indicates where a NUL
1770 // can be placed to create the short name. This function assumes that
1771 // the buffer is large enough for its results.
1772 static void
1773 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
1774 _Jv_Utf8Const *signature, char *buf, int *long_start)
1775 {
1776 strcpy (buf, "Java_");
1777 int here = 5;
1778
1779 // Add fully qualified class name.
1780 jchar *chars = _Jv_GetStringChars (klass->getName ());
1781 jint len = klass->getName ()->length ();
1782 for (int i = 0; i < len; ++i)
1783 add_char (buf, chars[i], &here);
1784
1785 // Don't use add_char because we need a literal `_'.
1786 buf[here++] = '_';
1787
1788 const unsigned char *fn = (const unsigned char *) func_name->data;
1789 const unsigned char *limit = fn + func_name->length;
1790 for (int i = 0; ; ++i)
1791 {
1792 int ch = UTF8_GET (fn, limit);
1793 if (ch < 0)
1794 break;
1795 add_char (buf, ch, &here);
1796 }
1797
1798 // This is where the long signature begins.
1799 *long_start = here;
1800 buf[here++] = '_';
1801 buf[here++] = '_';
1802
1803 const unsigned char *sig = (const unsigned char *) signature->data;
1804 limit = sig + signature->length;
1805 JvAssert (sig[0] == '(');
1806 ++sig;
1807 while (1)
1808 {
1809 int ch = UTF8_GET (sig, limit);
1810 if (ch == ')' || ch < 0)
1811 break;
1812 add_char (buf, ch, &here);
1813 }
1814
1815 buf[here] = '\0';
1816 }
1817
1818 // Return the current thread's JNIEnv; if one does not exist, create
1819 // it. Also create a new system frame for use. This is `extern "C"'
1820 // because the compiler calls it.
1821 extern "C" JNIEnv *
1822 _Jv_GetJNIEnvNewFrame (jclass klass)
1823 {
1824 JNIEnv *env = _Jv_GetCurrentJNIEnv ();
1825 if (env == NULL)
1826 {
1827 env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
1828 env->p = &_Jv_JNIFunctions;
1829 env->ex = NULL;
1830 env->klass = klass;
1831 env->locals = NULL;
1832
1833 _Jv_SetCurrentJNIEnv (env);
1834 }
1835
1836 _Jv_JNI_LocalFrame *frame
1837 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
1838 + (FRAME_SIZE
1839 * sizeof (jobject)));
1840
1841 frame->marker = MARK_SYSTEM;
1842 frame->size = FRAME_SIZE;
1843 frame->next = env->locals;
1844 env->locals = frame;
1845
1846 for (int i = 0; i < frame->size; ++i)
1847 frame->vec[i] = NULL;
1848
1849 return env;
1850 }
1851
1852 // Return the function which implements a particular JNI method. If
1853 // we can't find the function, we throw the appropriate exception.
1854 // This is `extern "C"' because the compiler uses it.
1855 extern "C" void *
1856 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
1857 _Jv_Utf8Const *signature)
1858 {
1859 char buf[10 + 6 * (name->length + signature->length)];
1860 int long_start;
1861 void *function;
1862
1863 // Synchronize on something convenient. Right now we use the hash.
1864 JvSynchronize sync (global_ref_table);
1865
1866 // First see if we have an override in the hash table.
1867 strncpy (buf, name->data, name->length);
1868 buf[name->length] = '\0';
1869 strncpy (buf + name->length + 1, signature->data, signature->length);
1870 buf[name->length + signature->length + 1] = '\0';
1871 JNINativeMethod meth;
1872 meth.name = buf;
1873 meth.signature = buf + name->length + 1;
1874 function = nathash_find (&meth);
1875 if (function != NULL)
1876 return function;
1877
1878 // If there was no override, then look in the symbol table.
1879 mangled_name (klass, name, signature, buf, &long_start);
1880 char c = buf[long_start];
1881 buf[long_start] = '\0';
1882 function = _Jv_FindSymbolInExecutable (buf);
1883 if (function == NULL)
1884 {
1885 buf[long_start] = c;
1886 function = _Jv_FindSymbolInExecutable (buf);
1887 if (function == NULL)
1888 {
1889 jstring str = JvNewStringUTF (name->data);
1890 throw new java::lang::AbstractMethodError (str);
1891 }
1892 }
1893
1894 return function;
1895 }
1896
1897 #ifdef INTERPRETER
1898
1899 // This function is the stub which is used to turn an ordinary (CNI)
1900 // method call into a JNI call.
1901 void
1902 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
1903 {
1904 _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
1905
1906 JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
1907
1908 // FIXME: we should mark every reference parameter as a local. For
1909 // now we assume a conservative GC, and we assume that the
1910 // references are on the stack somewhere.
1911
1912 // We cache the value that we find, of course, but if we don't find
1913 // a value we don't cache that fact -- we might subsequently load a
1914 // library which finds the function in question.
1915 {
1916 // Synchronize on a convenient object to ensure sanity in case two
1917 // threads reach this point for the same function at the same
1918 // time.
1919 JvSynchronize sync (global_ref_table);
1920 if (_this->function == NULL)
1921 _this->function = _Jv_LookupJNIMethod (_this->defining_class,
1922 _this->self->name,
1923 _this->self->signature);
1924 }
1925
1926 JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
1927 ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
1928 int offset = 0;
1929
1930 // First argument is always the environment pointer.
1931 real_args[offset++].ptr = env;
1932
1933 // For a static method, we pass in the Class. For non-static
1934 // methods, the `this' argument is already handled.
1935 if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
1936 real_args[offset++].ptr = _this->defining_class;
1937
1938 // Copy over passed-in arguments.
1939 memcpy (&real_args[offset], args, _this->args_raw_size);
1940
1941 // The actual call to the JNI function.
1942 ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
1943 ret, real_args);
1944
1945 _Jv_JNI_PopSystemFrame (env);
1946 }
1947
1948 #endif /* INTERPRETER */
1949
1950 \f
1951
1952 //
1953 // Invocation API.
1954 //
1955
1956 // An internal helper function.
1957 static jint
1958 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv, void *args)
1959 {
1960 JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
1961 java::lang::ThreadGroup *group = NULL;
1962
1963 if (attach)
1964 {
1965 // FIXME: do we really want to support 1.1?
1966 if (attach->version != JNI_VERSION_1_2
1967 && attach->version != JNI_VERSION_1_1)
1968 return JNI_EVERSION;
1969
1970 JvAssert (java::lang::ThreadGroup::class$.isInstance (attach->group));
1971 group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
1972 }
1973
1974 // Attaching an already-attached thread is a no-op.
1975 if (_Jv_GetCurrentJNIEnv () != NULL)
1976 return 0;
1977
1978 JNIEnv *env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
1979 if (env == NULL)
1980 return JNI_ERR;
1981 env->p = &_Jv_JNIFunctions;
1982 env->ex = NULL;
1983 env->klass = NULL;
1984 env->locals
1985 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
1986 + (FRAME_SIZE
1987 * sizeof (jobject)));
1988 if (env->locals == NULL)
1989 {
1990 _Jv_Free (env);
1991 return JNI_ERR;
1992 }
1993 *penv = reinterpret_cast<void *> (env);
1994
1995 // This thread might already be a Java thread -- this function might
1996 // have been called simply to set the new JNIEnv.
1997 if (_Jv_ThreadCurrent () == NULL)
1998 {
1999 try
2000 {
2001 _Jv_AttachCurrentThread (name, group);
2002 }
2003 catch (jthrowable t)
2004 {
2005 return JNI_ERR;
2006 }
2007 }
2008 _Jv_SetCurrentJNIEnv (env);
2009
2010 return 0;
2011 }
2012
2013 // This is the one actually used by JNI.
2014 static jint
2015 _Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
2016 {
2017 return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args);
2018 }
2019
2020 static jint
2021 _Jv_JNI_DestroyJavaVM (JavaVM *vm)
2022 {
2023 JvAssert (the_vm && vm == the_vm);
2024
2025 JNIEnv *env;
2026 if (_Jv_ThreadCurrent () != NULL)
2027 {
2028 jstring main_name;
2029 // This sucks.
2030 try
2031 {
2032 main_name = JvNewStringLatin1 ("main");
2033 }
2034 catch (jthrowable t)
2035 {
2036 return JNI_ERR;
2037 }
2038
2039 jint r = _Jv_JNI_AttachCurrentThread (vm,
2040 main_name,
2041 reinterpret_cast<void **> (&env),
2042 NULL);
2043 if (r < 0)
2044 return r;
2045 }
2046 else
2047 env = _Jv_GetCurrentJNIEnv ();
2048
2049 _Jv_ThreadWait ();
2050
2051 // Docs say that this always returns an error code.
2052 return JNI_ERR;
2053 }
2054
2055 jint
2056 _Jv_JNI_DetachCurrentThread (JavaVM *)
2057 {
2058 jint code = _Jv_DetachCurrentThread ();
2059 return code ? JNI_EDETACHED : 0;
2060 }
2061
2062 static jint
2063 _Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
2064 {
2065 if (_Jv_ThreadCurrent () == NULL)
2066 {
2067 *penv = NULL;
2068 return JNI_EDETACHED;
2069 }
2070
2071 #ifdef ENABLE_JVMPI
2072 // Handle JVMPI requests.
2073 if (version == JVMPI_VERSION_1)
2074 {
2075 *penv = (void *) &_Jv_JVMPI_Interface;
2076 return 0;
2077 }
2078 #endif
2079
2080 // FIXME: do we really want to support 1.1?
2081 if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_1)
2082 {
2083 *penv = NULL;
2084 return JNI_EVERSION;
2085 }
2086
2087 *penv = (void *) _Jv_GetCurrentJNIEnv ();
2088 return 0;
2089 }
2090
2091 jint
2092 JNI_GetDefaultJavaVMInitArgs (void *args)
2093 {
2094 jint version = * (jint *) args;
2095 // Here we only support 1.2.
2096 if (version != JNI_VERSION_1_2)
2097 return JNI_EVERSION;
2098
2099 JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2100 ia->version = JNI_VERSION_1_2;
2101 ia->nOptions = 0;
2102 ia->options = NULL;
2103 ia->ignoreUnrecognized = true;
2104
2105 return 0;
2106 }
2107
2108 jint
2109 JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
2110 {
2111 JvAssert (! the_vm);
2112 // FIXME: synchronize
2113 JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2114 if (nvm == NULL)
2115 return JNI_ERR;
2116 nvm->functions = &_Jv_JNI_InvokeFunctions;
2117
2118 // Parse the arguments.
2119 if (args != NULL)
2120 {
2121 jint version = * (jint *) args;
2122 // We only support 1.2.
2123 if (version != JNI_VERSION_1_2)
2124 return JNI_EVERSION;
2125 JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2126 for (int i = 0; i < ia->nOptions; ++i)
2127 {
2128 if (! strcmp (ia->options[i].optionString, "vfprintf")
2129 || ! strcmp (ia->options[i].optionString, "exit")
2130 || ! strcmp (ia->options[i].optionString, "abort"))
2131 {
2132 // We are required to recognize these, but for now we
2133 // don't handle them in any way. FIXME.
2134 continue;
2135 }
2136 else if (! strncmp (ia->options[i].optionString,
2137 "-verbose", sizeof ("-verbose") - 1))
2138 {
2139 // We don't do anything with this option either. We
2140 // might want to make sure the argument is valid, but we
2141 // don't really care all that much for now.
2142 continue;
2143 }
2144 else if (! strncmp (ia->options[i].optionString, "-D", 2))
2145 {
2146 // FIXME.
2147 continue;
2148 }
2149 else if (ia->ignoreUnrecognized)
2150 {
2151 if (ia->options[i].optionString[0] == '_'
2152 || ! strncmp (ia->options[i].optionString, "-X", 2))
2153 continue;
2154 }
2155
2156 return JNI_ERR;
2157 }
2158 }
2159
2160 jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
2161 if (r < 0)
2162 return r;
2163
2164 the_vm = nvm;
2165 *vm = the_vm;
2166
2167 _Jv_JNI_Init();
2168
2169 return 0;
2170 }
2171
2172 jint
2173 JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
2174 {
2175 if (buf_len <= 0)
2176 return JNI_ERR;
2177
2178 // We only support a single VM.
2179 if (the_vm != NULL)
2180 {
2181 vm_buffer[0] = the_vm;
2182 *n_vms = 1;
2183 }
2184 else
2185 *n_vms = 0;
2186 return 0;
2187 }
2188
2189 JavaVM *
2190 _Jv_GetJavaVM ()
2191 {
2192 // FIXME: synchronize
2193 if (! the_vm)
2194 {
2195 JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2196 if (nvm != NULL)
2197 nvm->functions = &_Jv_JNI_InvokeFunctions;
2198 the_vm = nvm;
2199 }
2200
2201 // If this is a Java thread, we want to make sure it has an
2202 // associated JNIEnv.
2203 if (_Jv_ThreadCurrent () != NULL)
2204 {
2205 void *ignore;
2206 _Jv_JNI_AttachCurrentThread (the_vm, &ignore, NULL);
2207 }
2208
2209 return the_vm;
2210 }
2211
2212 static jint
2213 _Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
2214 {
2215 *vm = _Jv_GetJavaVM ();
2216 return *vm == NULL ? JNI_ERR : JNI_OK;
2217 }
2218
2219 \f
2220
2221 #define NOT_IMPL NULL
2222 #define RESERVED NULL
2223
2224 struct JNINativeInterface _Jv_JNIFunctions =
2225 {
2226 RESERVED,
2227 RESERVED,
2228 RESERVED,
2229 RESERVED,
2230 _Jv_JNI_GetVersion, // GetVersion
2231 _Jv_JNI_DefineClass, // DefineClass
2232 _Jv_JNI_FindClass, // FindClass
2233 _Jv_JNI_FromReflectedMethod, // FromReflectedMethod
2234 _Jv_JNI_FromReflectedField, // FromReflectedField
2235 _Jv_JNI_ToReflectedMethod, // ToReflectedMethod
2236 _Jv_JNI_GetSuperclass, // GetSuperclass
2237 _Jv_JNI_IsAssignableFrom, // IsAssignableFrom
2238 _Jv_JNI_ToReflectedField, // ToReflectedField
2239 _Jv_JNI_Throw, // Throw
2240 _Jv_JNI_ThrowNew, // ThrowNew
2241 _Jv_JNI_ExceptionOccurred, // ExceptionOccurred
2242 _Jv_JNI_ExceptionDescribe, // ExceptionDescribe
2243 _Jv_JNI_ExceptionClear, // ExceptionClear
2244 _Jv_JNI_FatalError, // FatalError
2245
2246 _Jv_JNI_PushLocalFrame, // PushLocalFrame
2247 _Jv_JNI_PopLocalFrame, // PopLocalFrame
2248 _Jv_JNI_NewGlobalRef, // NewGlobalRef
2249 _Jv_JNI_DeleteGlobalRef, // DeleteGlobalRef
2250 _Jv_JNI_DeleteLocalRef, // DeleteLocalRef
2251
2252 _Jv_JNI_IsSameObject, // IsSameObject
2253
2254 _Jv_JNI_NewLocalRef, // NewLocalRef
2255 _Jv_JNI_EnsureLocalCapacity, // EnsureLocalCapacity
2256
2257 _Jv_JNI_AllocObject, // AllocObject
2258 _Jv_JNI_NewObject, // NewObject
2259 _Jv_JNI_NewObjectV, // NewObjectV
2260 _Jv_JNI_NewObjectA, // NewObjectA
2261 _Jv_JNI_GetObjectClass, // GetObjectClass
2262 _Jv_JNI_IsInstanceOf, // IsInstanceOf
2263 _Jv_JNI_GetAnyMethodID<false>, // GetMethodID
2264
2265 _Jv_JNI_CallMethod<jobject>, // CallObjectMethod
2266 _Jv_JNI_CallMethodV<jobject>, // CallObjectMethodV
2267 _Jv_JNI_CallMethodA<jobject>, // CallObjectMethodA
2268 _Jv_JNI_CallMethod<jboolean>, // CallBooleanMethod
2269 _Jv_JNI_CallMethodV<jboolean>, // CallBooleanMethodV
2270 _Jv_JNI_CallMethodA<jboolean>, // CallBooleanMethodA
2271 _Jv_JNI_CallMethod<jbyte>, // CallByteMethod
2272 _Jv_JNI_CallMethodV<jbyte>, // CallByteMethodV
2273 _Jv_JNI_CallMethodA<jbyte>, // CallByteMethodA
2274 _Jv_JNI_CallMethod<jchar>, // CallCharMethod
2275 _Jv_JNI_CallMethodV<jchar>, // CallCharMethodV
2276 _Jv_JNI_CallMethodA<jchar>, // CallCharMethodA
2277 _Jv_JNI_CallMethod<jshort>, // CallShortMethod
2278 _Jv_JNI_CallMethodV<jshort>, // CallShortMethodV
2279 _Jv_JNI_CallMethodA<jshort>, // CallShortMethodA
2280 _Jv_JNI_CallMethod<jint>, // CallIntMethod
2281 _Jv_JNI_CallMethodV<jint>, // CallIntMethodV
2282 _Jv_JNI_CallMethodA<jint>, // CallIntMethodA
2283 _Jv_JNI_CallMethod<jlong>, // CallLongMethod
2284 _Jv_JNI_CallMethodV<jlong>, // CallLongMethodV
2285 _Jv_JNI_CallMethodA<jlong>, // CallLongMethodA
2286 _Jv_JNI_CallMethod<jfloat>, // CallFloatMethod
2287 _Jv_JNI_CallMethodV<jfloat>, // CallFloatMethodV
2288 _Jv_JNI_CallMethodA<jfloat>, // CallFloatMethodA
2289 _Jv_JNI_CallMethod<jdouble>, // CallDoubleMethod
2290 _Jv_JNI_CallMethodV<jdouble>, // CallDoubleMethodV
2291 _Jv_JNI_CallMethodA<jdouble>, // CallDoubleMethodA
2292 _Jv_JNI_CallVoidMethod, // CallVoidMethod
2293 _Jv_JNI_CallVoidMethodV, // CallVoidMethodV
2294 _Jv_JNI_CallVoidMethodA, // CallVoidMethodA
2295
2296 // Nonvirtual method invocation functions follow.
2297 _Jv_JNI_CallAnyMethod<jobject, nonvirtual>, // CallNonvirtualObjectMethod
2298 _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>, // CallNonvirtualObjectMethodV
2299 _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>, // CallNonvirtualObjectMethodA
2300 _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>, // CallNonvirtualBooleanMethod
2301 _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2302 _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2303 _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>, // CallNonvirtualByteMethod
2304 _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>, // CallNonvirtualByteMethodV
2305 _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>, // CallNonvirtualByteMethodA
2306 _Jv_JNI_CallAnyMethod<jchar, nonvirtual>, // CallNonvirtualCharMethod
2307 _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>, // CallNonvirtualCharMethodV
2308 _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>, // CallNonvirtualCharMethodA
2309 _Jv_JNI_CallAnyMethod<jshort, nonvirtual>, // CallNonvirtualShortMethod
2310 _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>, // CallNonvirtualShortMethodV
2311 _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>, // CallNonvirtualShortMethodA
2312 _Jv_JNI_CallAnyMethod<jint, nonvirtual>, // CallNonvirtualIntMethod
2313 _Jv_JNI_CallAnyMethodV<jint, nonvirtual>, // CallNonvirtualIntMethodV
2314 _Jv_JNI_CallAnyMethodA<jint, nonvirtual>, // CallNonvirtualIntMethodA
2315 _Jv_JNI_CallAnyMethod<jlong, nonvirtual>, // CallNonvirtualLongMethod
2316 _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>, // CallNonvirtualLongMethodV
2317 _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>, // CallNonvirtualLongMethodA
2318 _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>, // CallNonvirtualFloatMethod
2319 _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>, // CallNonvirtualFloatMethodV
2320 _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>, // CallNonvirtualFloatMethodA
2321 _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>, // CallNonvirtualDoubleMethod
2322 _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodV
2323 _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodA
2324 _Jv_JNI_CallAnyVoidMethod<nonvirtual>, // CallNonvirtualVoidMethod
2325 _Jv_JNI_CallAnyVoidMethodV<nonvirtual>, // CallNonvirtualVoidMethodV
2326 _Jv_JNI_CallAnyVoidMethodA<nonvirtual>, // CallNonvirtualVoidMethodA
2327
2328 _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2329 _Jv_JNI_GetField<jobject>, // GetObjectField
2330 _Jv_JNI_GetField<jboolean>, // GetBooleanField
2331 _Jv_JNI_GetField<jbyte>, // GetByteField
2332 _Jv_JNI_GetField<jchar>, // GetCharField
2333 _Jv_JNI_GetField<jshort>, // GetShortField
2334 _Jv_JNI_GetField<jint>, // GetIntField
2335 _Jv_JNI_GetField<jlong>, // GetLongField
2336 _Jv_JNI_GetField<jfloat>, // GetFloatField
2337 _Jv_JNI_GetField<jdouble>, // GetDoubleField
2338 _Jv_JNI_SetField, // SetObjectField
2339 _Jv_JNI_SetField, // SetBooleanField
2340 _Jv_JNI_SetField, // SetByteField
2341 _Jv_JNI_SetField, // SetCharField
2342 _Jv_JNI_SetField, // SetShortField
2343 _Jv_JNI_SetField, // SetIntField
2344 _Jv_JNI_SetField, // SetLongField
2345 _Jv_JNI_SetField, // SetFloatField
2346 _Jv_JNI_SetField, // SetDoubleField
2347 _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2348
2349 _Jv_JNI_CallStaticMethod<jobject>, // CallStaticObjectMethod
2350 _Jv_JNI_CallStaticMethodV<jobject>, // CallStaticObjectMethodV
2351 _Jv_JNI_CallStaticMethodA<jobject>, // CallStaticObjectMethodA
2352 _Jv_JNI_CallStaticMethod<jboolean>, // CallStaticBooleanMethod
2353 _Jv_JNI_CallStaticMethodV<jboolean>, // CallStaticBooleanMethodV
2354 _Jv_JNI_CallStaticMethodA<jboolean>, // CallStaticBooleanMethodA
2355 _Jv_JNI_CallStaticMethod<jbyte>, // CallStaticByteMethod
2356 _Jv_JNI_CallStaticMethodV<jbyte>, // CallStaticByteMethodV
2357 _Jv_JNI_CallStaticMethodA<jbyte>, // CallStaticByteMethodA
2358 _Jv_JNI_CallStaticMethod<jchar>, // CallStaticCharMethod
2359 _Jv_JNI_CallStaticMethodV<jchar>, // CallStaticCharMethodV
2360 _Jv_JNI_CallStaticMethodA<jchar>, // CallStaticCharMethodA
2361 _Jv_JNI_CallStaticMethod<jshort>, // CallStaticShortMethod
2362 _Jv_JNI_CallStaticMethodV<jshort>, // CallStaticShortMethodV
2363 _Jv_JNI_CallStaticMethodA<jshort>, // CallStaticShortMethodA
2364 _Jv_JNI_CallStaticMethod<jint>, // CallStaticIntMethod
2365 _Jv_JNI_CallStaticMethodV<jint>, // CallStaticIntMethodV
2366 _Jv_JNI_CallStaticMethodA<jint>, // CallStaticIntMethodA
2367 _Jv_JNI_CallStaticMethod<jlong>, // CallStaticLongMethod
2368 _Jv_JNI_CallStaticMethodV<jlong>, // CallStaticLongMethodV
2369 _Jv_JNI_CallStaticMethodA<jlong>, // CallStaticLongMethodA
2370 _Jv_JNI_CallStaticMethod<jfloat>, // CallStaticFloatMethod
2371 _Jv_JNI_CallStaticMethodV<jfloat>, // CallStaticFloatMethodV
2372 _Jv_JNI_CallStaticMethodA<jfloat>, // CallStaticFloatMethodA
2373 _Jv_JNI_CallStaticMethod<jdouble>, // CallStaticDoubleMethod
2374 _Jv_JNI_CallStaticMethodV<jdouble>, // CallStaticDoubleMethodV
2375 _Jv_JNI_CallStaticMethodA<jdouble>, // CallStaticDoubleMethodA
2376 _Jv_JNI_CallStaticVoidMethod, // CallStaticVoidMethod
2377 _Jv_JNI_CallStaticVoidMethodV, // CallStaticVoidMethodV
2378 _Jv_JNI_CallStaticVoidMethodA, // CallStaticVoidMethodA
2379
2380 _Jv_JNI_GetAnyFieldID<true>, // GetStaticFieldID
2381 _Jv_JNI_GetStaticField<jobject>, // GetStaticObjectField
2382 _Jv_JNI_GetStaticField<jboolean>, // GetStaticBooleanField
2383 _Jv_JNI_GetStaticField<jbyte>, // GetStaticByteField
2384 _Jv_JNI_GetStaticField<jchar>, // GetStaticCharField
2385 _Jv_JNI_GetStaticField<jshort>, // GetStaticShortField
2386 _Jv_JNI_GetStaticField<jint>, // GetStaticIntField
2387 _Jv_JNI_GetStaticField<jlong>, // GetStaticLongField
2388 _Jv_JNI_GetStaticField<jfloat>, // GetStaticFloatField
2389 _Jv_JNI_GetStaticField<jdouble>, // GetStaticDoubleField
2390 _Jv_JNI_SetStaticField, // SetStaticObjectField
2391 _Jv_JNI_SetStaticField, // SetStaticBooleanField
2392 _Jv_JNI_SetStaticField, // SetStaticByteField
2393 _Jv_JNI_SetStaticField, // SetStaticCharField
2394 _Jv_JNI_SetStaticField, // SetStaticShortField
2395 _Jv_JNI_SetStaticField, // SetStaticIntField
2396 _Jv_JNI_SetStaticField, // SetStaticLongField
2397 _Jv_JNI_SetStaticField, // SetStaticFloatField
2398 _Jv_JNI_SetStaticField, // SetStaticDoubleField
2399 _Jv_JNI_NewString, // NewString
2400 _Jv_JNI_GetStringLength, // GetStringLength
2401 _Jv_JNI_GetStringChars, // GetStringChars
2402 _Jv_JNI_ReleaseStringChars, // ReleaseStringChars
2403 _Jv_JNI_NewStringUTF, // NewStringUTF
2404 _Jv_JNI_GetStringUTFLength, // GetStringUTFLength
2405 _Jv_JNI_GetStringUTFChars, // GetStringUTFLength
2406 _Jv_JNI_ReleaseStringUTFChars, // ReleaseStringUTFChars
2407 _Jv_JNI_GetArrayLength, // GetArrayLength
2408 _Jv_JNI_NewObjectArray, // NewObjectArray
2409 _Jv_JNI_GetObjectArrayElement, // GetObjectArrayElement
2410 _Jv_JNI_SetObjectArrayElement, // SetObjectArrayElement
2411 _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2412 // NewBooleanArray
2413 _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>, // NewByteArray
2414 _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>, // NewCharArray
2415 _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>, // NewShortArray
2416 _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>, // NewIntArray
2417 _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>, // NewLongArray
2418 _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>, // NewFloatArray
2419 _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2420 _Jv_JNI_GetPrimitiveArrayElements, // GetBooleanArrayElements
2421 _Jv_JNI_GetPrimitiveArrayElements, // GetByteArrayElements
2422 _Jv_JNI_GetPrimitiveArrayElements, // GetCharArrayElements
2423 _Jv_JNI_GetPrimitiveArrayElements, // GetShortArrayElements
2424 _Jv_JNI_GetPrimitiveArrayElements, // GetIntArrayElements
2425 _Jv_JNI_GetPrimitiveArrayElements, // GetLongArrayElements
2426 _Jv_JNI_GetPrimitiveArrayElements, // GetFloatArrayElements
2427 _Jv_JNI_GetPrimitiveArrayElements, // GetDoubleArrayElements
2428 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseBooleanArrayElements
2429 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseByteArrayElements
2430 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseCharArrayElements
2431 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseShortArrayElements
2432 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseIntArrayElements
2433 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseLongArrayElements
2434 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseFloatArrayElements
2435 _Jv_JNI_ReleasePrimitiveArrayElements, // ReleaseDoubleArrayElements
2436 _Jv_JNI_GetPrimitiveArrayRegion, // GetBooleanArrayRegion
2437 _Jv_JNI_GetPrimitiveArrayRegion, // GetByteArrayRegion
2438 _Jv_JNI_GetPrimitiveArrayRegion, // GetCharArrayRegion
2439 _Jv_JNI_GetPrimitiveArrayRegion, // GetShortArrayRegion
2440 _Jv_JNI_GetPrimitiveArrayRegion, // GetIntArrayRegion
2441 _Jv_JNI_GetPrimitiveArrayRegion, // GetLongArrayRegion
2442 _Jv_JNI_GetPrimitiveArrayRegion, // GetFloatArrayRegion
2443 _Jv_JNI_GetPrimitiveArrayRegion, // GetDoubleArrayRegion
2444 _Jv_JNI_SetPrimitiveArrayRegion, // SetBooleanArrayRegion
2445 _Jv_JNI_SetPrimitiveArrayRegion, // SetByteArrayRegion
2446 _Jv_JNI_SetPrimitiveArrayRegion, // SetCharArrayRegion
2447 _Jv_JNI_SetPrimitiveArrayRegion, // SetShortArrayRegion
2448 _Jv_JNI_SetPrimitiveArrayRegion, // SetIntArrayRegion
2449 _Jv_JNI_SetPrimitiveArrayRegion, // SetLongArrayRegion
2450 _Jv_JNI_SetPrimitiveArrayRegion, // SetFloatArrayRegion
2451 _Jv_JNI_SetPrimitiveArrayRegion, // SetDoubleArrayRegion
2452 _Jv_JNI_RegisterNatives, // RegisterNatives
2453 _Jv_JNI_UnregisterNatives, // UnregisterNatives
2454 _Jv_JNI_MonitorEnter, // MonitorEnter
2455 _Jv_JNI_MonitorExit, // MonitorExit
2456 _Jv_JNI_GetJavaVM, // GetJavaVM
2457
2458 _Jv_JNI_GetStringRegion, // GetStringRegion
2459 _Jv_JNI_GetStringUTFRegion, // GetStringUTFRegion
2460 _Jv_JNI_GetPrimitiveArrayCritical, // GetPrimitiveArrayCritical
2461 _Jv_JNI_ReleasePrimitiveArrayCritical, // ReleasePrimitiveArrayCritical
2462 _Jv_JNI_GetStringCritical, // GetStringCritical
2463 _Jv_JNI_ReleaseStringCritical, // ReleaseStringCritical
2464
2465 NOT_IMPL /* newweakglobalref */,
2466 NOT_IMPL /* deleteweakglobalref */,
2467
2468 _Jv_JNI_ExceptionCheck
2469 };
2470
2471 struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
2472 {
2473 RESERVED,
2474 RESERVED,
2475 RESERVED,
2476
2477 _Jv_JNI_DestroyJavaVM,
2478 _Jv_JNI_AttachCurrentThread,
2479 _Jv_JNI_DetachCurrentThread,
2480 _Jv_JNI_GetEnv
2481 };
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