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PR c++/5247
[official-gcc.git] / libjava / jni.cc
bloba65952bedc9e61489f0d32a0e317c21e2e729770
1 // jni.cc - JNI implementation, including the jump table.
2
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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 #ifdef INTERPRETER
26 #include <jvmti.h>
27 #include "jvmti-int.h"
28 #endif
29 #include <java/lang/Class.h>
30 #include <java/lang/ClassLoader.h>
31 #include <java/lang/Throwable.h>
32 #include <java/lang/ArrayIndexOutOfBoundsException.h>
33 #include <java/lang/StringIndexOutOfBoundsException.h>
34 #include <java/lang/StringBuffer.h>
35 #include <java/lang/UnsatisfiedLinkError.h>
36 #include <java/lang/InstantiationException.h>
37 #include <java/lang/NoSuchFieldError.h>
38 #include <java/lang/NoSuchMethodError.h>
39 #include <java/lang/reflect/Constructor.h>
40 #include <java/lang/reflect/Method.h>
41 #include <java/lang/reflect/Modifier.h>
42 #include <java/lang/OutOfMemoryError.h>
43 #include <java/lang/Integer.h>
44 #include <java/lang/ThreadGroup.h>
45 #include <java/lang/Thread.h>
46 #include <java/lang/IllegalAccessError.h>
47 #include <java/nio/Buffer.h>
48 #include <java/nio/DirectByteBufferImpl.h>
49 #include <java/nio/DirectByteBufferImpl$ReadWrite.h>
50 #include <java/util/IdentityHashMap.h>
51 #include <gnu/gcj/RawData.h>
52 #include <java/lang/ClassNotFoundException.h>
53
54 #include <gcj/method.h>
55 #include <gcj/field.h>
56
57 #include <java-interp.h>
58 #include <java-threads.h>
59
60 using namespace gcj;
61
62 // This enum is used to select different template instantiations in
63 // the invocation code.
64 enum invocation_type
65 {
66 normal,
67 nonvirtual,
68 static_type,
69 constructor
70 };
71
72 // Forward declarations.
73 extern struct JNINativeInterface_ _Jv_JNIFunctions;
74 extern struct JNIInvokeInterface_ _Jv_JNI_InvokeFunctions;
75
76 // Number of slots in the default frame. The VM must allow at least
77 // 16.
78 #define FRAME_SIZE 16
79
80 // Mark value indicating this is an overflow frame.
81 #define MARK_NONE 0
82 // Mark value indicating this is a user frame.
83 #define MARK_USER 1
84 // Mark value indicating this is a system frame.
85 #define MARK_SYSTEM 2
86
87 // This structure is used to keep track of local references.
88 struct _Jv_JNI_LocalFrame
89 {
90 // This is one of the MARK_ constants.
91 unsigned char marker;
92
93 // Flag to indicate some locals were allocated.
94 bool allocated_p;
95
96 // Number of elements in frame.
97 int size;
98
99 // The class loader of the JNI method that allocated this frame.
100 ::java::lang::ClassLoader *loader;
101
102 // Next frame in chain.
103 _Jv_JNI_LocalFrame *next;
104
105 // The elements. These are allocated using the C "struct hack".
106 jobject vec[0];
107 };
108
109 // This holds a reference count for all local references.
110 static java::util::IdentityHashMap *local_ref_table;
111 // This holds a reference count for all global references.
112 static java::util::IdentityHashMap *global_ref_table;
113
114 // The only VM.
115 JavaVM *_Jv_the_vm;
116
117 #ifdef ENABLE_JVMPI
118 // The only JVMPI interface description.
119 static JVMPI_Interface _Jv_JVMPI_Interface;
120
121 static jint
122 jvmpiEnableEvent (jint event_type, void *)
123 {
124 switch (event_type)
125 {
126 case JVMPI_EVENT_OBJECT_ALLOC:
127 _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
128 break;
129
130 case JVMPI_EVENT_THREAD_START:
131 _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
132 break;
133
134 case JVMPI_EVENT_THREAD_END:
135 _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
136 break;
137
138 default:
139 return JVMPI_NOT_AVAILABLE;
140 }
141
142 return JVMPI_SUCCESS;
143 }
144
145 static jint
146 jvmpiDisableEvent (jint event_type, void *)
147 {
148 switch (event_type)
149 {
150 case JVMPI_EVENT_OBJECT_ALLOC:
151 _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
152 break;
153
154 default:
155 return JVMPI_NOT_AVAILABLE;
156 }
157
158 return JVMPI_SUCCESS;
159 }
160 #endif
161
162 \f
163
164 void
165 _Jv_JNI_Init (void)
166 {
167 local_ref_table = new java::util::IdentityHashMap;
168 global_ref_table = new java::util::IdentityHashMap;
169
170 #ifdef ENABLE_JVMPI
171 _Jv_JVMPI_Interface.version = 1;
172 _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
173 _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
174 _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
175 _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
176 _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
177 #endif
178 }
179
180 // Tell the GC that a certain pointer is live.
181 static void
182 mark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
183 {
184 JvSynchronize sync (ref_table);
185
186 using namespace java::lang;
187 Integer *refcount = (Integer *) ref_table->get (obj);
188 jint val = (refcount == NULL) ? 0 : refcount->intValue ();
189 // FIXME: what about out of memory error?
190 ref_table->put (obj, new Integer (val + 1));
191 }
192
193 // Unmark a pointer.
194 static void
195 unmark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
196 {
197 JvSynchronize sync (ref_table);
198
199 using namespace java::lang;
200 Integer *refcount = (Integer *) ref_table->get (obj);
201 JvAssert (refcount);
202 jint val = refcount->intValue () - 1;
203 JvAssert (val >= 0);
204 if (val == 0)
205 ref_table->remove (obj);
206 else
207 // FIXME: what about out of memory error?
208 ref_table->put (obj, new Integer (val));
209 }
210
211 // "Unwrap" some random non-reference type. This exists to simplify
212 // other template functions.
213 template<typename T>
214 static T
215 unwrap (T val)
216 {
217 return val;
218 }
219
220 // Unwrap a weak reference, if required.
221 template<typename T>
222 static T *
223 unwrap (T *obj)
224 {
225 using namespace gnu::gcj::runtime;
226 // We can compare the class directly because JNIWeakRef is `final'.
227 // Doing it this way is much faster.
228 if (obj == NULL || obj->getClass () != &JNIWeakRef::class$)
229 return obj;
230 JNIWeakRef *wr = reinterpret_cast<JNIWeakRef *> (obj);
231 return reinterpret_cast<T *> (wr->get ());
232 }
233
234 jobject
235 _Jv_UnwrapJNIweakReference (jobject obj)
236 {
237 return unwrap (obj);
238 }
239
240 \f
241
242 static jobject JNICALL
243 _Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
244 {
245 // This seems weird but I think it is correct.
246 obj = unwrap (obj);
247 mark_for_gc (obj, global_ref_table);
248 return obj;
249 }
250
251 static void JNICALL
252 _Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
253 {
254 // This seems weird but I think it is correct.
255 obj = unwrap (obj);
256
257 // NULL is ok here -- the JNI specification doesn't say so, but this
258 // is a no-op.
259 if (! obj)
260 return;
261
262 unmark_for_gc (obj, global_ref_table);
263 }
264
265 static void JNICALL
266 _Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
267 {
268 _Jv_JNI_LocalFrame *frame;
269
270 // This seems weird but I think it is correct.
271 obj = unwrap (obj);
272
273 // NULL is ok here -- the JNI specification doesn't say so, but this
274 // is a no-op.
275 if (! obj)
276 return;
277
278 for (frame = env->locals; frame != NULL; frame = frame->next)
279 {
280 for (int i = 0; i < frame->size; ++i)
281 {
282 if (frame->vec[i] == obj)
283 {
284 frame->vec[i] = NULL;
285 unmark_for_gc (obj, local_ref_table);
286 return;
287 }
288 }
289
290 // Don't go past a marked frame.
291 JvAssert (frame->marker == MARK_NONE);
292 }
293
294 JvAssert (0);
295 }
296
297 static jint JNICALL
298 _Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
299 {
300 // It is easier to just always allocate a new frame of the requested
301 // size. This isn't the most efficient thing, but for now we don't
302 // care. Note that _Jv_JNI_PushLocalFrame relies on this right now.
303
304 _Jv_JNI_LocalFrame *frame;
305 try
306 {
307 frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
308 + size * sizeof (jobject));
309 }
310 catch (jthrowable t)
311 {
312 env->ex = t;
313 return JNI_ERR;
314 }
315
316 frame->marker = MARK_NONE;
317 frame->size = size;
318 frame->allocated_p = false;
319 memset (&frame->vec[0], 0, size * sizeof (jobject));
320 frame->loader = env->locals->loader;
321 frame->next = env->locals;
322 env->locals = frame;
323
324 return 0;
325 }
326
327 static jint JNICALL
328 _Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
329 {
330 jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
331 if (r < 0)
332 return r;
333
334 // The new frame is on top.
335 env->locals->marker = MARK_USER;
336
337 return 0;
338 }
339
340 static jobject JNICALL
341 _Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
342 {
343 // This seems weird but I think it is correct.
344 obj = unwrap (obj);
345
346 // Try to find an open slot somewhere in the topmost frame.
347 _Jv_JNI_LocalFrame *frame = env->locals;
348 bool done = false, set = false;
349 for (; frame != NULL && ! done; frame = frame->next)
350 {
351 for (int i = 0; i < frame->size; ++i)
352 {
353 if (frame->vec[i] == NULL)
354 {
355 set = true;
356 done = true;
357 frame->vec[i] = obj;
358 frame->allocated_p = true;
359 break;
360 }
361 }
362
363 // If we found a slot, or if the frame we just searched is the
364 // mark frame, then we are done.
365 if (done || frame == NULL || frame->marker != MARK_NONE)
366 break;
367 }
368
369 if (! set)
370 {
371 // No slots, so we allocate a new frame. According to the spec
372 // we could just die here. FIXME: return value.
373 _Jv_JNI_EnsureLocalCapacity (env, 16);
374 // We know the first element of the new frame will be ok.
375 env->locals->vec[0] = obj;
376 env->locals->allocated_p = true;
377 }
378
379 mark_for_gc (obj, local_ref_table);
380 return obj;
381 }
382
383 static jobject JNICALL
384 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result, int stop)
385 {
386 _Jv_JNI_LocalFrame *rf = env->locals;
387
388 bool done = false;
389 while (rf != NULL && ! done)
390 {
391 for (int i = 0; i < rf->size; ++i)
392 if (rf->vec[i] != NULL)
393 unmark_for_gc (rf->vec[i], local_ref_table);
394
395 // If the frame we just freed is the marker frame, we are done.
396 done = (rf->marker == stop);
397
398 _Jv_JNI_LocalFrame *n = rf->next;
399 // When N==NULL, we've reached the reusable bottom_locals, and we must
400 // not free it. However, we must be sure to clear all its elements.
401 if (n == NULL)
402 {
403 if (rf->allocated_p)
404 memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
405 rf->allocated_p = false;
406 rf = NULL;
407 break;
408 }
409
410 _Jv_Free (rf);
411 rf = n;
412 }
413
414 // Update the local frame information.
415 env->locals = rf;
416
417 return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
418 }
419
420 static jobject JNICALL
421 _Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
422 {
423 return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
424 }
425
426 // Make sure an array's type is compatible with the type of the
427 // destination.
428 template<typename T>
429 static bool
430 _Jv_JNI_check_types (JNIEnv *env, JArray<T> *array, jclass K)
431 {
432 jclass klass = array->getClass()->getComponentType();
433 if (__builtin_expect (klass != K, false))
434 {
435 env->ex = new java::lang::IllegalAccessError ();
436 return false;
437 }
438 else
439 return true;
440 }
441
442 // Pop a `system' frame from the stack. This is `extern "C"' as it is
443 // used by the compiler.
444 extern "C" void
445 _Jv_JNI_PopSystemFrame (JNIEnv *env)
446 {
447 // Only enter slow path when we're not at the bottom, or there have been
448 // allocations. Usually this is false and we can just null out the locals
449 // field.
450
451 if (__builtin_expect ((env->locals->next
452 || env->locals->allocated_p), false))
453 _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
454 else
455 env->locals = NULL;
456
457 #ifdef INTERPRETER
458 if (__builtin_expect (env->ex != NULL, false))
459 {
460 jthrowable t = env->ex;
461 env->ex = NULL;
462 if (JVMTI_REQUESTED_EVENT (Exception))
463 _Jv_ReportJVMTIExceptionThrow (t);
464 throw t;
465 }
466 #endif
467 }
468
469 template<typename T> T extract_from_jvalue(jvalue const & t);
470 template<> jboolean extract_from_jvalue(jvalue const & jv) { return jv.z; }
471 template<> jbyte extract_from_jvalue(jvalue const & jv) { return jv.b; }
472 template<> jchar extract_from_jvalue(jvalue const & jv) { return jv.c; }
473 template<> jshort extract_from_jvalue(jvalue const & jv) { return jv.s; }
474 template<> jint extract_from_jvalue(jvalue const & jv) { return jv.i; }
475 template<> jlong extract_from_jvalue(jvalue const & jv) { return jv.j; }
476 template<> jfloat extract_from_jvalue(jvalue const & jv) { return jv.f; }
477 template<> jdouble extract_from_jvalue(jvalue const & jv) { return jv.d; }
478 template<> jobject extract_from_jvalue(jvalue const & jv) { return jv.l; }
479
480
481 // This function is used from other template functions. It wraps the
482 // return value appropriately; we specialize it so that object returns
483 // are turned into local references.
484 template<typename T>
485 static T
486 wrap_value (JNIEnv *, T value)
487 {
488 return value;
489 }
490
491 // This specialization is used for jobject, jclass, jstring, jarray,
492 // etc.
493 template<typename R, typename T>
494 static T *
495 wrap_value (JNIEnv *env, T *value)
496 {
497 return (value == NULL
498 ? value
499 : (T *) _Jv_JNI_NewLocalRef (env, (jobject) value));
500 }
501
502 \f
503
504 static jint JNICALL
505 _Jv_JNI_GetVersion (JNIEnv *)
506 {
507 return JNI_VERSION_1_4;
508 }
509
510 static jclass JNICALL
511 _Jv_JNI_DefineClass (JNIEnv *env, const char *name, jobject loader,
512 const jbyte *buf, jsize bufLen)
513 {
514 try
515 {
516 loader = unwrap (loader);
517
518 jstring sname = JvNewStringUTF (name);
519 jbyteArray bytes = JvNewByteArray (bufLen);
520
521 jbyte *elts = elements (bytes);
522 memcpy (elts, buf, bufLen * sizeof (jbyte));
523
524 java::lang::ClassLoader *l
525 = reinterpret_cast<java::lang::ClassLoader *> (loader);
526
527 jclass result = l->defineClass (sname, bytes, 0, bufLen);
528 return (jclass) wrap_value (env, result);
529 }
530 catch (jthrowable t)
531 {
532 env->ex = t;
533 return NULL;
534 }
535 }
536
537 static jclass JNICALL
538 _Jv_JNI_FindClass (JNIEnv *env, const char *name)
539 {
540 // FIXME: assume that NAME isn't too long.
541 int len = strlen (name);
542 char s[len + 1];
543 for (int i = 0; i <= len; ++i)
544 s[i] = (name[i] == '/') ? '.' : name[i];
545
546 jclass r = NULL;
547 try
548 {
549 // This might throw an out of memory exception.
550 jstring n = JvNewStringUTF (s);
551
552 java::lang::ClassLoader *loader = NULL;
553 if (env->locals->loader != NULL)
554 loader = env->locals->loader;
555
556 if (loader == NULL)
557 {
558 // FIXME: should use getBaseClassLoader, but we don't have that
559 // yet.
560 loader = java::lang::ClassLoader::getSystemClassLoader ();
561 }
562
563 r = loader->loadClass (n);
564 _Jv_InitClass (r);
565 }
566 catch (jthrowable t)
567 {
568 env->ex = t;
569 }
570
571 return (jclass) wrap_value (env, r);
572 }
573
574 static jclass JNICALL
575 _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
576 {
577 return (jclass) wrap_value (env, unwrap (clazz)->getSuperclass ());
578 }
579
580 static jboolean JNICALL
581 _Jv_JNI_IsAssignableFrom (JNIEnv *, jclass clazz1, jclass clazz2)
582 {
583 return unwrap (clazz2)->isAssignableFrom (unwrap (clazz1));
584 }
585
586 static jint JNICALL
587 _Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
588 {
589 // We check in case the user did some funky cast.
590 obj = unwrap (obj);
591 JvAssert (obj != NULL && java::lang::Throwable::class$.isInstance (obj));
592 env->ex = obj;
593 return 0;
594 }
595
596 static jint JNICALL
597 _Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
598 {
599 using namespace java::lang::reflect;
600
601 clazz = unwrap (clazz);
602 JvAssert (java::lang::Throwable::class$.isAssignableFrom (clazz));
603
604 int r = JNI_OK;
605 try
606 {
607 JArray<jclass> *argtypes
608 = (JArray<jclass> *) JvNewObjectArray (1, &java::lang::Class::class$,
609 NULL);
610
611 jclass *elts = elements (argtypes);
612 elts[0] = &java::lang::String::class$;
613
614 Constructor *cons = clazz->getConstructor (argtypes);
615
616 jobjectArray values = JvNewObjectArray (1, &java::lang::String::class$,
617 NULL);
618 jobject *velts = elements (values);
619 velts[0] = JvNewStringUTF (message);
620
621 jobject obj = cons->newInstance (values);
622
623 env->ex = reinterpret_cast<jthrowable> (obj);
624 }
625 catch (jthrowable t)
626 {
627 env->ex = t;
628 r = JNI_ERR;
629 }
630
631 return r;
632 }
633
634 static jthrowable JNICALL
635 _Jv_JNI_ExceptionOccurred (JNIEnv *env)
636 {
637 return (jthrowable) wrap_value (env, env->ex);
638 }
639
640 static void JNICALL
641 _Jv_JNI_ExceptionDescribe (JNIEnv *env)
642 {
643 if (env->ex != NULL)
644 env->ex->printStackTrace();
645 }
646
647 static void JNICALL
648 _Jv_JNI_ExceptionClear (JNIEnv *env)
649 {
650 env->ex = NULL;
651 }
652
653 static jboolean JNICALL
654 _Jv_JNI_ExceptionCheck (JNIEnv *env)
655 {
656 return env->ex != NULL;
657 }
658
659 static void JNICALL
660 _Jv_JNI_FatalError (JNIEnv *, const char *message)
661 {
662 JvFail (message);
663 }
664
665 \f
666
667 static jboolean JNICALL
668 _Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
669 {
670 return unwrap (obj1) == unwrap (obj2);
671 }
672
673 static jobject JNICALL
674 _Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
675 {
676 jobject obj = NULL;
677 using namespace java::lang::reflect;
678
679 try
680 {
681 clazz = unwrap (clazz);
682 JvAssert (clazz && ! clazz->isArray ());
683 if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
684 env->ex = new java::lang::InstantiationException ();
685 else
686 obj = _Jv_AllocObject (clazz);
687 }
688 catch (jthrowable t)
689 {
690 env->ex = t;
691 }
692
693 return wrap_value (env, obj);
694 }
695
696 static jclass JNICALL
697 _Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
698 {
699 obj = unwrap (obj);
700 JvAssert (obj);
701 return (jclass) wrap_value (env, obj->getClass());
702 }
703
704 static jboolean JNICALL
705 _Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
706 {
707 return unwrap (clazz)->isInstance(unwrap (obj));
708 }
709
710 \f
711
712 //
713 // This section concerns method invocation.
714 //
715
716 template<jboolean is_static>
717 static jmethodID JNICALL
718 _Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
719 const char *name, const char *sig)
720 {
721 try
722 {
723 clazz = unwrap (clazz);
724 _Jv_InitClass (clazz);
725
726 _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
727
728 // FIXME: assume that SIG isn't too long.
729 int len = strlen (sig);
730 char s[len + 1];
731 for (int i = 0; i <= len; ++i)
732 s[i] = (sig[i] == '/') ? '.' : sig[i];
733 _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
734
735 JvAssert (! clazz->isPrimitive());
736
737 using namespace java::lang::reflect;
738
739 while (clazz != NULL)
740 {
741 jint count = JvNumMethods (clazz);
742 jmethodID meth = JvGetFirstMethod (clazz);
743
744 for (jint i = 0; i < count; ++i)
745 {
746 if (((is_static && Modifier::isStatic (meth->accflags))
747 || (! is_static && ! Modifier::isStatic (meth->accflags)))
748 && _Jv_equalUtf8Consts (meth->name, name_u)
749 && _Jv_equalUtf8Consts (meth->signature, sig_u))
750 return meth;
751
752 meth = meth->getNextMethod();
753 }
754
755 clazz = clazz->getSuperclass ();
756 }
757
758 java::lang::StringBuffer *name_sig =
759 new java::lang::StringBuffer (JvNewStringUTF (name));
760 name_sig->append ((jchar) ' ');
761 name_sig->append (JvNewStringUTF (s));
762 env->ex = new java::lang::NoSuchMethodError (name_sig->toString ());
763 }
764 catch (jthrowable t)
765 {
766 env->ex = t;
767 }
768
769 return NULL;
770 }
771
772 // This is a helper function which turns a va_list into an array of
773 // `jvalue's. It needs signature information in order to do its work.
774 // The array of values must already be allocated.
775 static void
776 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
777 {
778 jclass *arg_elts = elements (arg_types);
779 for (int i = 0; i < arg_types->length; ++i)
780 {
781 // Here we assume that sizeof(int) >= sizeof(jint), because we
782 // use `int' when decoding the varargs. Likewise for
783 // float, and double. Also we assume that sizeof(jlong) >=
784 // sizeof(int), i.e. that jlong values are not further
785 // promoted.
786 JvAssert (sizeof (int) >= sizeof (jint));
787 JvAssert (sizeof (jlong) >= sizeof (int));
788 JvAssert (sizeof (double) >= sizeof (jfloat));
789 JvAssert (sizeof (double) >= sizeof (jdouble));
790 if (arg_elts[i] == JvPrimClass (byte))
791 values[i].b = (jbyte) va_arg (vargs, int);
792 else if (arg_elts[i] == JvPrimClass (short))
793 values[i].s = (jshort) va_arg (vargs, int);
794 else if (arg_elts[i] == JvPrimClass (int))
795 values[i].i = (jint) va_arg (vargs, int);
796 else if (arg_elts[i] == JvPrimClass (long))
797 values[i].j = (jlong) va_arg (vargs, jlong);
798 else if (arg_elts[i] == JvPrimClass (float))
799 values[i].f = (jfloat) va_arg (vargs, double);
800 else if (arg_elts[i] == JvPrimClass (double))
801 values[i].d = (jdouble) va_arg (vargs, double);
802 else if (arg_elts[i] == JvPrimClass (boolean))
803 values[i].z = (jboolean) va_arg (vargs, int);
804 else if (arg_elts[i] == JvPrimClass (char))
805 values[i].c = (jchar) va_arg (vargs, int);
806 else
807 {
808 // An object.
809 values[i].l = unwrap (va_arg (vargs, jobject));
810 }
811 }
812 }
813
814 // This can call any sort of method: virtual, "nonvirtual", static, or
815 // constructor.
816 template<typename T, invocation_type style>
817 static T JNICALL
818 _Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
819 jmethodID id, va_list vargs)
820 {
821 obj = unwrap (obj);
822 klass = unwrap (klass);
823
824 jclass decl_class = klass ? klass : obj->getClass ();
825 JvAssert (decl_class != NULL);
826
827 jclass return_type;
828 JArray<jclass> *arg_types;
829
830 try
831 {
832 _Jv_GetTypesFromSignature (id, decl_class,
833 &arg_types, &return_type);
834
835 jvalue args[arg_types->length];
836 array_from_valist (args, arg_types, vargs);
837
838 // For constructors we need to pass the Class we are instantiating.
839 if (style == constructor)
840 return_type = klass;
841
842 jvalue result;
843 _Jv_CallAnyMethodA (obj, return_type, id,
844 style == constructor,
845 style == normal,
846 arg_types, args, &result);
847
848 return wrap_value (env, extract_from_jvalue<T>(result));
849 }
850 catch (jthrowable t)
851 {
852 env->ex = t;
853 }
854
855 return wrap_value (env, (T) 0);
856 }
857
858 template<typename T, invocation_type style>
859 static T JNICALL
860 _Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
861 jmethodID method, ...)
862 {
863 va_list args;
864 T result;
865
866 va_start (args, method);
867 result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
868 va_end (args);
869
870 return result;
871 }
872
873 template<typename T, invocation_type style>
874 static T JNICALL
875 _Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
876 jmethodID id, const jvalue *args)
877 {
878 obj = unwrap (obj);
879 klass = unwrap (klass);
880
881 jclass decl_class = klass ? klass : obj->getClass ();
882 JvAssert (decl_class != NULL);
883
884 jclass return_type;
885 JArray<jclass> *arg_types;
886 try
887 {
888 _Jv_GetTypesFromSignature (id, decl_class,
889 &arg_types, &return_type);
890
891 // For constructors we need to pass the Class we are instantiating.
892 if (style == constructor)
893 return_type = klass;
894
895 // Unwrap arguments as required. Eww.
896 jclass *type_elts = elements (arg_types);
897 jvalue arg_copy[arg_types->length];
898 for (int i = 0; i < arg_types->length; ++i)
899 {
900 if (type_elts[i]->isPrimitive ())
901 arg_copy[i] = args[i];
902 else
903 arg_copy[i].l = unwrap (args[i].l);
904 }
905
906 jvalue result;
907 _Jv_CallAnyMethodA (obj, return_type, id,
908 style == constructor,
909 style == normal,
910 arg_types, arg_copy, &result);
911
912 return wrap_value (env, extract_from_jvalue<T>(result));
913 }
914 catch (jthrowable t)
915 {
916 env->ex = t;
917 }
918
919 return wrap_value (env, (T) 0);
920 }
921
922 template<invocation_type style>
923 static void JNICALL
924 _Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
925 jmethodID id, va_list vargs)
926 {
927 obj = unwrap (obj);
928 klass = unwrap (klass);
929
930 jclass decl_class = klass ? klass : obj->getClass ();
931 JvAssert (decl_class != NULL);
932
933 jclass return_type;
934 JArray<jclass> *arg_types;
935 try
936 {
937 _Jv_GetTypesFromSignature (id, decl_class,
938 &arg_types, &return_type);
939
940 jvalue args[arg_types->length];
941 array_from_valist (args, arg_types, vargs);
942
943 // For constructors we need to pass the Class we are instantiating.
944 if (style == constructor)
945 return_type = klass;
946
947 _Jv_CallAnyMethodA (obj, return_type, id,
948 style == constructor,
949 style == normal,
950 arg_types, args, NULL);
951 }
952 catch (jthrowable t)
953 {
954 env->ex = t;
955 }
956 }
957
958 template<invocation_type style>
959 static void JNICALL
960 _Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
961 jmethodID method, ...)
962 {
963 va_list args;
964
965 va_start (args, method);
966 _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
967 va_end (args);
968 }
969
970 template<invocation_type style>
971 static void JNICALL
972 _Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
973 jmethodID id, const jvalue *args)
974 {
975 jclass decl_class = klass ? klass : obj->getClass ();
976 JvAssert (decl_class != NULL);
977
978 jclass return_type;
979 JArray<jclass> *arg_types;
980 try
981 {
982 _Jv_GetTypesFromSignature (id, decl_class,
983 &arg_types, &return_type);
984
985 // Unwrap arguments as required. Eww.
986 jclass *type_elts = elements (arg_types);
987 jvalue arg_copy[arg_types->length];
988 for (int i = 0; i < arg_types->length; ++i)
989 {
990 if (type_elts[i]->isPrimitive ())
991 arg_copy[i] = args[i];
992 else
993 arg_copy[i].l = unwrap (args[i].l);
994 }
995
996 _Jv_CallAnyMethodA (obj, return_type, id,
997 style == constructor,
998 style == normal,
999 arg_types, args, NULL);
1000 }
1001 catch (jthrowable t)
1002 {
1003 env->ex = t;
1004 }
1005 }
1006
1007 // Functions with this signature are used to implement functions in
1008 // the CallMethod family.
1009 template<typename T>
1010 static T JNICALL
1011 _Jv_JNI_CallMethodV (JNIEnv *env, jobject obj,
1012 jmethodID id, va_list args)
1013 {
1014 return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
1015 }
1016
1017 // Functions with this signature are used to implement functions in
1018 // the CallMethod family.
1019 template<typename T>
1020 static T JNICALL
1021 _Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
1022 {
1023 va_list args;
1024 T result;
1025
1026 va_start (args, id);
1027 result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
1028 va_end (args);
1029
1030 return result;
1031 }
1032
1033 // Functions with this signature are used to implement functions in
1034 // the CallMethod family.
1035 template<typename T>
1036 static T JNICALL
1037 _Jv_JNI_CallMethodA (JNIEnv *env, jobject obj,
1038 jmethodID id, const jvalue *args)
1039 {
1040 return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
1041 }
1042
1043 static void JNICALL
1044 _Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj,
1045 jmethodID id, va_list args)
1046 {
1047 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1048 }
1049
1050 static void JNICALL
1051 _Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
1052 {
1053 va_list args;
1054
1055 va_start (args, id);
1056 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1057 va_end (args);
1058 }
1059
1060 static void JNICALL
1061 _Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj,
1062 jmethodID id, const jvalue *args)
1063 {
1064 _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
1065 }
1066
1067 // Functions with this signature are used to implement functions in
1068 // the CallStaticMethod family.
1069 template<typename T>
1070 static T JNICALL
1071 _Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
1072 jmethodID id, va_list args)
1073 {
1074 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1075 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1076
1077 return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
1078 }
1079
1080 // Functions with this signature are used to implement functions in
1081 // the CallStaticMethod family.
1082 template<typename T>
1083 static T JNICALL
1084 _Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass,
1085 jmethodID id, ...)
1086 {
1087 va_list args;
1088 T result;
1089
1090 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1091 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1092
1093 va_start (args, id);
1094 result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
1095 id, args);
1096 va_end (args);
1097
1098 return result;
1099 }
1100
1101 // Functions with this signature are used to implement functions in
1102 // the CallStaticMethod family.
1103 template<typename T>
1104 static T JNICALL
1105 _Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
1106 const jvalue *args)
1107 {
1108 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1109 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1110
1111 return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
1112 }
1113
1114 static void JNICALL
1115 _Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass,
1116 jmethodID id, va_list args)
1117 {
1118 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1119 }
1120
1121 static void JNICALL
1122 _Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass,
1123 jmethodID id, ...)
1124 {
1125 va_list args;
1126
1127 va_start (args, id);
1128 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1129 va_end (args);
1130 }
1131
1132 static void JNICALL
1133 _Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass,
1134 jmethodID id, const jvalue *args)
1135 {
1136 _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
1137 }
1138
1139 static jobject JNICALL
1140 _Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
1141 jmethodID id, va_list args)
1142 {
1143 JvAssert (klass && ! klass->isArray ());
1144 JvAssert (! strcmp (id->name->chars(), "<init>")
1145 && id->signature->len() > 2
1146 && id->signature->chars()[0] == '('
1147 && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1148 ")V"));
1149
1150 return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1151 id, args);
1152 }
1153
1154 static jobject JNICALL
1155 _Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
1156 {
1157 JvAssert (klass && ! klass->isArray ());
1158 JvAssert (! strcmp (id->name->chars(), "<init>")
1159 && id->signature->len() > 2
1160 && id->signature->chars()[0] == '('
1161 && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1162 ")V"));
1163
1164 va_list args;
1165 jobject result;
1166
1167 va_start (args, id);
1168 result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1169 id, args);
1170 va_end (args);
1171
1172 return result;
1173 }
1174
1175 static jobject JNICALL
1176 _Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
1177 const jvalue *args)
1178 {
1179 JvAssert (klass && ! klass->isArray ());
1180 JvAssert (! strcmp (id->name->chars(), "<init>")
1181 && id->signature->len() > 2
1182 && id->signature->chars()[0] == '('
1183 && ! strcmp (&id->signature->chars()[id->signature->len() - 2],
1184 ")V"));
1185
1186 return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1187 id, args);
1188 }
1189
1190 \f
1191
1192 template<typename T>
1193 static T JNICALL
1194 _Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
1195 {
1196 obj = unwrap (obj);
1197 JvAssert (obj);
1198 T *ptr = (T *) ((char *) obj + field->getOffset ());
1199 return wrap_value (env, *ptr);
1200 }
1201
1202 template<typename T>
1203 static void JNICALL
1204 _Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
1205 {
1206 obj = unwrap (obj);
1207 value = unwrap (value);
1208
1209 JvAssert (obj);
1210 T *ptr = (T *) ((char *) obj + field->getOffset ());
1211 *ptr = value;
1212 }
1213
1214 template<jboolean is_static>
1215 static jfieldID JNICALL
1216 _Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
1217 const char *name, const char *sig)
1218 {
1219 try
1220 {
1221 clazz = unwrap (clazz);
1222
1223 _Jv_InitClass (clazz);
1224
1225 _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1226
1227 // FIXME: assume that SIG isn't too long.
1228 int len = strlen (sig);
1229 char s[len + 1];
1230 for (int i = 0; i <= len; ++i)
1231 s[i] = (sig[i] == '/') ? '.' : sig[i];
1232 java::lang::ClassLoader *loader = clazz->getClassLoaderInternal ();
1233 jclass field_class = _Jv_FindClassFromSignature ((char *) s, loader);
1234 if (! field_class)
1235 throw new java::lang::ClassNotFoundException(JvNewStringUTF(s));
1236
1237 while (clazz != NULL)
1238 {
1239 // We acquire the class lock so that fields aren't resolved
1240 // while we are running.
1241 JvSynchronize sync (clazz);
1242
1243 jint count = (is_static
1244 ? JvNumStaticFields (clazz)
1245 : JvNumInstanceFields (clazz));
1246 jfieldID field = (is_static
1247 ? JvGetFirstStaticField (clazz)
1248 : JvGetFirstInstanceField (clazz));
1249 for (jint i = 0; i < count; ++i)
1250 {
1251 _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1252
1253 // The field might be resolved or it might not be. It
1254 // is much simpler to always resolve it.
1255 _Jv_Linker::resolve_field (field, loader);
1256 if (_Jv_equalUtf8Consts (f_name, a_name)
1257 && field->getClass() == field_class)
1258 return field;
1259
1260 field = field->getNextField ();
1261 }
1262
1263 clazz = clazz->getSuperclass ();
1264 }
1265
1266 env->ex = new java::lang::NoSuchFieldError ();
1267 }
1268 catch (jthrowable t)
1269 {
1270 env->ex = t;
1271 }
1272 return NULL;
1273 }
1274
1275 template<typename T>
1276 static T JNICALL
1277 _Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
1278 {
1279 T *ptr = (T *) field->u.addr;
1280 return wrap_value (env, *ptr);
1281 }
1282
1283 template<typename T>
1284 static void JNICALL
1285 _Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
1286 {
1287 value = unwrap (value);
1288 T *ptr = (T *) field->u.addr;
1289 *ptr = value;
1290 }
1291
1292 static jstring JNICALL
1293 _Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
1294 {
1295 try
1296 {
1297 jstring r = _Jv_NewString (unichars, len);
1298 return (jstring) wrap_value (env, r);
1299 }
1300 catch (jthrowable t)
1301 {
1302 env->ex = t;
1303 return NULL;
1304 }
1305 }
1306
1307 static jsize JNICALL
1308 _Jv_JNI_GetStringLength (JNIEnv *, jstring string)
1309 {
1310 return unwrap (string)->length();
1311 }
1312
1313 static const jchar * JNICALL
1314 _Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
1315 {
1316 string = unwrap (string);
1317 jchar *result = _Jv_GetStringChars (string);
1318 mark_for_gc (string, global_ref_table);
1319 if (isCopy)
1320 *isCopy = false;
1321 return (const jchar *) result;
1322 }
1323
1324 static void JNICALL
1325 _Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
1326 {
1327 unmark_for_gc (unwrap (string), global_ref_table);
1328 }
1329
1330 static jstring JNICALL
1331 _Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
1332 {
1333 try
1334 {
1335 jstring result = JvNewStringUTF (bytes);
1336 return (jstring) wrap_value (env, result);
1337 }
1338 catch (jthrowable t)
1339 {
1340 env->ex = t;
1341 return NULL;
1342 }
1343 }
1344
1345 static jsize JNICALL
1346 _Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
1347 {
1348 return JvGetStringUTFLength (unwrap (string));
1349 }
1350
1351 static const char * JNICALL
1352 _Jv_JNI_GetStringUTFChars (JNIEnv *env, jstring string,
1353 jboolean *isCopy)
1354 {
1355 try
1356 {
1357 string = unwrap (string);
1358 if (string == NULL)
1359 return NULL;
1360 jsize len = JvGetStringUTFLength (string);
1361 char *r = (char *) _Jv_Malloc (len + 1);
1362 JvGetStringUTFRegion (string, 0, string->length(), r);
1363 r[len] = '\0';
1364
1365 if (isCopy)
1366 *isCopy = true;
1367
1368 return (const char *) r;
1369 }
1370 catch (jthrowable t)
1371 {
1372 env->ex = t;
1373 return NULL;
1374 }
1375 }
1376
1377 static void JNICALL
1378 _Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
1379 {
1380 _Jv_Free ((void *) utf);
1381 }
1382
1383 static void JNICALL
1384 _Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start,
1385 jsize len, jchar *buf)
1386 {
1387 string = unwrap (string);
1388 jchar *result = _Jv_GetStringChars (string);
1389 if (start < 0 || start > string->length ()
1390 || len < 0 || start + len > string->length ())
1391 {
1392 try
1393 {
1394 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1395 }
1396 catch (jthrowable t)
1397 {
1398 env->ex = t;
1399 }
1400 }
1401 else
1402 memcpy (buf, &result[start], len * sizeof (jchar));
1403 }
1404
1405 static void JNICALL
1406 _Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
1407 jsize len, char *buf)
1408 {
1409 str = unwrap (str);
1410
1411 if (start < 0 || start > str->length ()
1412 || len < 0 || start + len > str->length ())
1413 {
1414 try
1415 {
1416 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1417 }
1418 catch (jthrowable t)
1419 {
1420 env->ex = t;
1421 }
1422 }
1423 else
1424 _Jv_GetStringUTFRegion (str, start, len, buf);
1425 }
1426
1427 static const jchar * JNICALL
1428 _Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
1429 {
1430 jchar *result = _Jv_GetStringChars (unwrap (str));
1431 if (isCopy)
1432 *isCopy = false;
1433 return result;
1434 }
1435
1436 static void JNICALL
1437 _Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
1438 {
1439 // Nothing.
1440 }
1441
1442 static jsize JNICALL
1443 _Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
1444 {
1445 return unwrap (array)->length;
1446 }
1447
1448 static jobjectArray JNICALL
1449 _Jv_JNI_NewObjectArray (JNIEnv *env, jsize length,
1450 jclass elementClass, jobject init)
1451 {
1452 try
1453 {
1454 elementClass = unwrap (elementClass);
1455 init = unwrap (init);
1456
1457 _Jv_CheckCast (elementClass, init);
1458 jarray result = JvNewObjectArray (length, elementClass, init);
1459 return (jobjectArray) wrap_value (env, result);
1460 }
1461 catch (jthrowable t)
1462 {
1463 env->ex = t;
1464 return NULL;
1465 }
1466 }
1467
1468 static jobject JNICALL
1469 _Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array,
1470 jsize index)
1471 {
1472 if ((unsigned) index >= (unsigned) array->length)
1473 _Jv_ThrowBadArrayIndex (index);
1474 jobject *elts = elements (unwrap (array));
1475 return wrap_value (env, elts[index]);
1476 }
1477
1478 static void JNICALL
1479 _Jv_JNI_SetObjectArrayElement (JNIEnv *env, jobjectArray array,
1480 jsize index, jobject value)
1481 {
1482 try
1483 {
1484 array = unwrap (array);
1485 value = unwrap (value);
1486
1487 _Jv_CheckArrayStore (array, value);
1488 if ((unsigned) index >= (unsigned) array->length)
1489 _Jv_ThrowBadArrayIndex (index);
1490 jobject *elts = elements (array);
1491 elts[index] = value;
1492 }
1493 catch (jthrowable t)
1494 {
1495 env->ex = t;
1496 }
1497 }
1498
1499 template<typename T, jclass K>
1500 static JArray<T> * JNICALL
1501 _Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
1502 {
1503 try
1504 {
1505 return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1506 }
1507 catch (jthrowable t)
1508 {
1509 env->ex = t;
1510 return NULL;
1511 }
1512 }
1513
1514 template<typename T, jclass K>
1515 static T * JNICALL
1516 _Jv_JNI_GetPrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1517 jboolean *isCopy)
1518 {
1519 array = unwrap (array);
1520 if (! _Jv_JNI_check_types (env, array, K))
1521 return NULL;
1522 T *elts = elements (array);
1523 if (isCopy)
1524 {
1525 // We elect never to copy.
1526 *isCopy = false;
1527 }
1528 mark_for_gc (array, global_ref_table);
1529 return elts;
1530 }
1531
1532 template<typename T, jclass K>
1533 static void JNICALL
1534 _Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *env, JArray<T> *array,
1535 T *, jint /* mode */)
1536 {
1537 array = unwrap (array);
1538 _Jv_JNI_check_types (env, array, K);
1539 // Note that we ignore MODE. We can do this because we never copy
1540 // the array elements. My reading of the JNI documentation is that
1541 // this is an option for the implementor.
1542 unmark_for_gc (array, global_ref_table);
1543 }
1544
1545 template<typename T, jclass K>
1546 static void JNICALL
1547 _Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1548 jsize start, jsize len,
1549 T *buf)
1550 {
1551 array = unwrap (array);
1552 if (! _Jv_JNI_check_types (env, array, K))
1553 return;
1554
1555 // The cast to unsigned lets us save a comparison.
1556 if (start < 0 || len < 0
1557 || (unsigned long) (start + len) > (unsigned long) array->length)
1558 {
1559 try
1560 {
1561 // FIXME: index.
1562 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1563 }
1564 catch (jthrowable t)
1565 {
1566 // Could have thown out of memory error.
1567 env->ex = t;
1568 }
1569 }
1570 else
1571 {
1572 T *elts = elements (array) + start;
1573 memcpy (buf, elts, len * sizeof (T));
1574 }
1575 }
1576
1577 template<typename T, jclass K>
1578 static void JNICALL
1579 _Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
1580 jsize start, jsize len, const T *buf)
1581 {
1582 array = unwrap (array);
1583 if (! _Jv_JNI_check_types (env, array, K))
1584 return;
1585
1586 // The cast to unsigned lets us save a comparison.
1587 if (start < 0 || len < 0
1588 || (unsigned long) (start + len) > (unsigned long) array->length)
1589 {
1590 try
1591 {
1592 // FIXME: index.
1593 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1594 }
1595 catch (jthrowable t)
1596 {
1597 env->ex = t;
1598 }
1599 }
1600 else
1601 {
1602 T *elts = elements (array) + start;
1603 memcpy (elts, buf, len * sizeof (T));
1604 }
1605 }
1606
1607 static void * JNICALL
1608 _Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
1609 jboolean *isCopy)
1610 {
1611 array = unwrap (array);
1612 // FIXME: does this work?
1613 jclass klass = array->getClass()->getComponentType();
1614 JvAssert (klass->isPrimitive ());
1615 char *r = _Jv_GetArrayElementFromElementType (array, klass);
1616 if (isCopy)
1617 *isCopy = false;
1618 return r;
1619 }
1620
1621 static void JNICALL
1622 _Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
1623 {
1624 // Nothing.
1625 }
1626
1627 static jint JNICALL
1628 _Jv_JNI_MonitorEnter (JNIEnv *env, jobject obj)
1629 {
1630 try
1631 {
1632 _Jv_MonitorEnter (unwrap (obj));
1633 return 0;
1634 }
1635 catch (jthrowable t)
1636 {
1637 env->ex = t;
1638 }
1639 return JNI_ERR;
1640 }
1641
1642 static jint JNICALL
1643 _Jv_JNI_MonitorExit (JNIEnv *env, jobject obj)
1644 {
1645 try
1646 {
1647 _Jv_MonitorExit (unwrap (obj));
1648 return 0;
1649 }
1650 catch (jthrowable t)
1651 {
1652 env->ex = t;
1653 }
1654 return JNI_ERR;
1655 }
1656
1657 // JDK 1.2
1658 jobject JNICALL
1659 _Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
1660 jboolean)
1661 {
1662 try
1663 {
1664 cls = unwrap (cls);
1665 java::lang::reflect::Field *field = new java::lang::reflect::Field();
1666 field->declaringClass = cls;
1667 field->offset = (char*) fieldID - (char *) cls->fields;
1668 field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1669 return wrap_value (env, field);
1670 }
1671 catch (jthrowable t)
1672 {
1673 env->ex = t;
1674 }
1675 return NULL;
1676 }
1677
1678 // JDK 1.2
1679 static jfieldID JNICALL
1680 _Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
1681 {
1682 using namespace java::lang::reflect;
1683
1684 f = unwrap (f);
1685 Field *field = reinterpret_cast<Field *> (f);
1686 return _Jv_FromReflectedField (field);
1687 }
1688
1689 jobject JNICALL
1690 _Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
1691 jboolean)
1692 {
1693 using namespace java::lang::reflect;
1694
1695 jobject result = NULL;
1696 klass = unwrap (klass);
1697
1698 try
1699 {
1700 if (_Jv_equalUtf8Consts (id->name, init_name))
1701 {
1702 // A constructor.
1703 Constructor *cons = new Constructor ();
1704 cons->offset = (char *) id - (char *) &klass->methods;
1705 cons->declaringClass = klass;
1706 result = cons;
1707 }
1708 else
1709 {
1710 Method *meth = new Method ();
1711 meth->offset = (char *) id - (char *) &klass->methods;
1712 meth->declaringClass = klass;
1713 result = meth;
1714 }
1715 }
1716 catch (jthrowable t)
1717 {
1718 env->ex = t;
1719 }
1720
1721 return wrap_value (env, result);
1722 }
1723
1724 static jmethodID JNICALL
1725 _Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
1726 {
1727 using namespace java::lang::reflect;
1728 method = unwrap (method);
1729 if (Method::class$.isInstance (method))
1730 return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1731 return
1732 _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1733 }
1734
1735 // JDK 1.2.
1736 jweak JNICALL
1737 _Jv_JNI_NewWeakGlobalRef (JNIEnv *env, jobject obj)
1738 {
1739 using namespace gnu::gcj::runtime;
1740 JNIWeakRef *ref = NULL;
1741
1742 try
1743 {
1744 // This seems weird but I think it is correct.
1745 obj = unwrap (obj);
1746 ref = new JNIWeakRef (obj);
1747 mark_for_gc (ref, global_ref_table);
1748 }
1749 catch (jthrowable t)
1750 {
1751 env->ex = t;
1752 }
1753
1754 return reinterpret_cast<jweak> (ref);
1755 }
1756
1757 void JNICALL
1758 _Jv_JNI_DeleteWeakGlobalRef (JNIEnv *, jweak obj)
1759 {
1760 // JDK compatibility.
1761 if (obj == NULL)
1762 return;
1763
1764 using namespace gnu::gcj::runtime;
1765 JNIWeakRef *ref = reinterpret_cast<JNIWeakRef *> (obj);
1766 unmark_for_gc (ref, global_ref_table);
1767 ref->clear ();
1768 }
1769
1770 \f
1771
1772 // Direct byte buffers.
1773
1774 static jobject JNICALL
1775 _Jv_JNI_NewDirectByteBuffer (JNIEnv *, void *address, jlong length)
1776 {
1777 using namespace gnu::gcj;
1778 using namespace java::nio;
1779 return new DirectByteBufferImpl$ReadWrite
1780 (reinterpret_cast<RawData *> (address), length);
1781 }
1782
1783 static void * JNICALL
1784 _Jv_JNI_GetDirectBufferAddress (JNIEnv *, jobject buffer)
1785 {
1786 using namespace java::nio;
1787 if (! _Jv_IsInstanceOf (buffer, &Buffer::class$))
1788 return NULL;
1789 Buffer *tmp = static_cast<Buffer *> (buffer);
1790 return reinterpret_cast<void *> (tmp->address);
1791 }
1792
1793 static jlong JNICALL
1794 _Jv_JNI_GetDirectBufferCapacity (JNIEnv *, jobject buffer)
1795 {
1796 using namespace java::nio;
1797 if (! _Jv_IsInstanceOf (buffer, &Buffer::class$))
1798 return -1;
1799 Buffer *tmp = static_cast<Buffer *> (buffer);
1800 if (tmp->address == NULL)
1801 return -1;
1802 return tmp->capacity();
1803 }
1804
1805 \f
1806
1807 struct NativeMethodCacheEntry : public JNINativeMethod
1808 {
1809 char *className;
1810 };
1811
1812 // Hash table of native methods.
1813 static NativeMethodCacheEntry *nathash;
1814 // Number of slots used.
1815 static int nathash_count = 0;
1816 // Number of slots available. Must be power of 2.
1817 static int nathash_size = 0;
1818
1819 #define DELETED_ENTRY ((char *) (~0))
1820
1821 // Compute a hash value for a native method descriptor.
1822 static int
1823 hash (const NativeMethodCacheEntry *method)
1824 {
1825 char *ptr;
1826 int hash = 0;
1827
1828 ptr = method->className;
1829 while (*ptr)
1830 hash = (31 * hash) + *ptr++;
1831
1832 ptr = method->name;
1833 while (*ptr)
1834 hash = (31 * hash) + *ptr++;
1835
1836 ptr = method->signature;
1837 while (*ptr)
1838 hash = (31 * hash) + *ptr++;
1839
1840 return hash;
1841 }
1842
1843 // Find the slot where a native method goes.
1844 static NativeMethodCacheEntry *
1845 nathash_find_slot (const NativeMethodCacheEntry *method)
1846 {
1847 jint h = hash (method);
1848 int step = (h ^ (h >> 16)) | 1;
1849 int w = h & (nathash_size - 1);
1850 int del = -1;
1851
1852 for (;;)
1853 {
1854 NativeMethodCacheEntry *slotp = &nathash[w];
1855 if (slotp->name == NULL)
1856 {
1857 if (del >= 0)
1858 return &nathash[del];
1859 else
1860 return slotp;
1861 }
1862 else if (slotp->name == DELETED_ENTRY)
1863 del = w;
1864 else if (! strcmp (slotp->name, method->name)
1865 && ! strcmp (slotp->signature, method->signature)
1866 && ! strcmp (slotp->className, method->className))
1867 return slotp;
1868 w = (w + step) & (nathash_size - 1);
1869 }
1870 }
1871
1872 // Find a method. Return NULL if it isn't in the hash table.
1873 static void *
1874 nathash_find (NativeMethodCacheEntry *method)
1875 {
1876 if (nathash == NULL)
1877 return NULL;
1878 NativeMethodCacheEntry *slot = nathash_find_slot (method);
1879 if (slot->name == NULL || slot->name == DELETED_ENTRY)
1880 return NULL;
1881 return slot->fnPtr;
1882 }
1883
1884 static void
1885 natrehash ()
1886 {
1887 if (nathash == NULL)
1888 {
1889 nathash_size = 1024;
1890 nathash =
1891 (NativeMethodCacheEntry *) _Jv_AllocBytes (nathash_size
1892 * sizeof (NativeMethodCacheEntry));
1893 }
1894 else
1895 {
1896 int savesize = nathash_size;
1897 NativeMethodCacheEntry *savehash = nathash;
1898 nathash_size *= 2;
1899 nathash =
1900 (NativeMethodCacheEntry *) _Jv_AllocBytes (nathash_size
1901 * sizeof (NativeMethodCacheEntry));
1902
1903 for (int i = 0; i < savesize; ++i)
1904 {
1905 if (savehash[i].name != NULL && savehash[i].name != DELETED_ENTRY)
1906 {
1907 NativeMethodCacheEntry *slot = nathash_find_slot (&savehash[i]);
1908 *slot = savehash[i];
1909 }
1910 }
1911 }
1912 }
1913
1914 static void
1915 nathash_add (const NativeMethodCacheEntry *method)
1916 {
1917 if (3 * nathash_count >= 2 * nathash_size)
1918 natrehash ();
1919 NativeMethodCacheEntry *slot = nathash_find_slot (method);
1920 // If the slot has a real entry in it, then there is no work to do.
1921 if (slot->name != NULL && slot->name != DELETED_ENTRY)
1922 return;
1923 // FIXME: memory leak?
1924 slot->name = strdup (method->name);
1925 slot->className = strdup (method->className);
1926 // This was already strduped in _Jv_JNI_RegisterNatives.
1927 slot->signature = method->signature;
1928 slot->fnPtr = method->fnPtr;
1929 }
1930
1931 static jint JNICALL
1932 _Jv_JNI_RegisterNatives (JNIEnv *env, jclass klass,
1933 const JNINativeMethod *methods,
1934 jint nMethods)
1935 {
1936 // Synchronize while we do the work. This must match
1937 // synchronization in some other functions that manipulate or use
1938 // the nathash table.
1939 JvSynchronize sync (global_ref_table);
1940
1941 NativeMethodCacheEntry dottedMethod;
1942
1943 // Look at each descriptor given us, and find the corresponding
1944 // method in the class.
1945 for (int j = 0; j < nMethods; ++j)
1946 {
1947 bool found = false;
1948
1949 _Jv_Method *imeths = JvGetFirstMethod (klass);
1950 for (int i = 0; i < JvNumMethods (klass); ++i)
1951 {
1952 _Jv_Method *self = &imeths[i];
1953
1954 // Copy this JNINativeMethod and do a slash to dot
1955 // conversion on the signature.
1956 dottedMethod.name = methods[j].name;
1957 // FIXME: we leak a little memory here if the method
1958 // is not found.
1959 dottedMethod.signature = strdup (methods[j].signature);
1960 dottedMethod.fnPtr = methods[j].fnPtr;
1961 dottedMethod.className = _Jv_GetClassNameUtf8 (klass)->chars();
1962 char *c = dottedMethod.signature;
1963 while (*c)
1964 {
1965 if (*c == '/')
1966 *c = '.';
1967 c++;
1968 }
1969
1970 if (! strcmp (self->name->chars (), dottedMethod.name)
1971 && ! strcmp (self->signature->chars (), dottedMethod.signature))
1972 {
1973 if (! (self->accflags & java::lang::reflect::Modifier::NATIVE))
1974 break;
1975
1976 // Found a match that is native.
1977 found = true;
1978 nathash_add (&dottedMethod);
1979
1980 break;
1981 }
1982 }
1983
1984 if (! found)
1985 {
1986 jstring m = JvNewStringUTF (methods[j].name);
1987 try
1988 {
1989 env->ex = new java::lang::NoSuchMethodError (m);
1990 }
1991 catch (jthrowable t)
1992 {
1993 env->ex = t;
1994 }
1995 return JNI_ERR;
1996 }
1997 }
1998
1999 return JNI_OK;
2000 }
2001
2002 static jint JNICALL
2003 _Jv_JNI_UnregisterNatives (JNIEnv *, jclass)
2004 {
2005 // FIXME -- we could implement this.
2006 return JNI_ERR;
2007 }
2008
2009 \f
2010
2011 // Add a character to the buffer, encoding properly.
2012 static void
2013 add_char (char *buf, jchar c, int *here)
2014 {
2015 if (c == '_')
2016 {
2017 buf[(*here)++] = '_';
2018 buf[(*here)++] = '1';
2019 }
2020 else if (c == ';')
2021 {
2022 buf[(*here)++] = '_';
2023 buf[(*here)++] = '2';
2024 }
2025 else if (c == '[')
2026 {
2027 buf[(*here)++] = '_';
2028 buf[(*here)++] = '3';
2029 }
2030
2031 // Also check for `.' here because we might be passed an internal
2032 // qualified class name like `foo.bar'.
2033 else if (c == '/' || c == '.')
2034 buf[(*here)++] = '_';
2035 else if ((c >= '0' && c <= '9')
2036 || (c >= 'a' && c <= 'z')
2037 || (c >= 'A' && c <= 'Z'))
2038 buf[(*here)++] = (char) c;
2039 else
2040 {
2041 // "Unicode" character.
2042 buf[(*here)++] = '_';
2043 buf[(*here)++] = '0';
2044 for (int i = 0; i < 4; ++i)
2045 {
2046 int val = c & 0x0f;
2047 buf[(*here) + 3 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
2048 c >>= 4;
2049 }
2050 *here += 4;
2051 }
2052 }
2053
2054 // Compute a mangled name for a native function. This computes the
2055 // long name, and also returns an index which indicates where a NUL
2056 // can be placed to create the short name. This function assumes that
2057 // the buffer is large enough for its results.
2058 static void
2059 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
2060 _Jv_Utf8Const *signature, char *buf, int *long_start)
2061 {
2062 strcpy (buf, "Java_");
2063 int here = 5;
2064
2065 // Add fully qualified class name.
2066 jchar *chars = _Jv_GetStringChars (klass->getName ());
2067 jint len = klass->getName ()->length ();
2068 for (int i = 0; i < len; ++i)
2069 add_char (buf, chars[i], &here);
2070
2071 // Don't use add_char because we need a literal `_'.
2072 buf[here++] = '_';
2073
2074 const unsigned char *fn = (const unsigned char *) func_name->chars ();
2075 const unsigned char *limit = fn + func_name->len ();
2076 for (int i = 0; ; ++i)
2077 {
2078 int ch = UTF8_GET (fn, limit);
2079 if (ch < 0)
2080 break;
2081 add_char (buf, ch, &here);
2082 }
2083
2084 // This is where the long signature begins.
2085 *long_start = here;
2086 buf[here++] = '_';
2087 buf[here++] = '_';
2088
2089 const unsigned char *sig = (const unsigned char *) signature->chars ();
2090 limit = sig + signature->len ();
2091 JvAssert (sig[0] == '(');
2092 ++sig;
2093 while (1)
2094 {
2095 int ch = UTF8_GET (sig, limit);
2096 if (ch == ')' || ch < 0)
2097 break;
2098 add_char (buf, ch, &here);
2099 }
2100
2101 buf[here] = '\0';
2102 }
2103
2104 JNIEnv *
2105 _Jv_GetJNIEnvNewFrameWithLoader (::java::lang::ClassLoader *loader)
2106 {
2107 JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2108 if (__builtin_expect (env == NULL, false))
2109 {
2110 env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2111 env->p = &_Jv_JNIFunctions;
2112 env->locals = NULL;
2113 // We set env->ex below.
2114
2115 // Set up the bottom, reusable frame.
2116 env->bottom_locals = (_Jv_JNI_LocalFrame *)
2117 _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2118 + (FRAME_SIZE
2119 * sizeof (jobject)));
2120
2121 env->bottom_locals->marker = MARK_SYSTEM;
2122 env->bottom_locals->size = FRAME_SIZE;
2123 env->bottom_locals->next = NULL;
2124 env->bottom_locals->allocated_p = false;
2125 // We set the klass field below.
2126 memset (&env->bottom_locals->vec[0], 0,
2127 env->bottom_locals->size * sizeof (jobject));
2128
2129 _Jv_SetCurrentJNIEnv (env);
2130 }
2131
2132 // If we're in a simple JNI call (non-nested), we can just reuse the
2133 // locals frame we allocated many calls ago, back when the env was first
2134 // built, above.
2135
2136 if (__builtin_expect (env->locals == NULL, true))
2137 {
2138 env->locals = env->bottom_locals;
2139 env->locals->loader = loader;
2140 }
2141 else
2142 {
2143 // Alternatively, we might be re-entering JNI, in which case we can't
2144 // reuse the bottom_locals frame, because it is already underneath
2145 // us. So we need to make a new one.
2146 _Jv_JNI_LocalFrame *frame
2147 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2148 + (FRAME_SIZE
2149 * sizeof (jobject)));
2150
2151 frame->marker = MARK_SYSTEM;
2152 frame->size = FRAME_SIZE;
2153 frame->allocated_p = false;
2154 frame->next = env->locals;
2155 frame->loader = loader;
2156
2157 memset (&frame->vec[0], 0,
2158 frame->size * sizeof (jobject));
2159
2160 env->locals = frame;
2161 }
2162
2163 env->ex = NULL;
2164
2165 return env;
2166 }
2167
2168 // Return the current thread's JNIEnv; if one does not exist, create
2169 // it. Also create a new system frame for use. This is `extern "C"'
2170 // because the compiler calls it.
2171 extern "C" JNIEnv *
2172 _Jv_GetJNIEnvNewFrame (jclass klass)
2173 {
2174 return _Jv_GetJNIEnvNewFrameWithLoader (klass->getClassLoaderInternal());
2175 }
2176
2177 // Destroy the env's reusable resources. This is called from the thread
2178 // destructor "finalize_native" in natThread.cc
2179 void
2180 _Jv_FreeJNIEnv (_Jv_JNIEnv *env)
2181 {
2182 if (env == NULL)
2183 return;
2184
2185 if (env->bottom_locals != NULL)
2186 _Jv_Free (env->bottom_locals);
2187
2188 _Jv_Free (env);
2189 }
2190
2191 // Return the function which implements a particular JNI method. If
2192 // we can't find the function, we throw the appropriate exception.
2193 // This is `extern "C"' because the compiler uses it.
2194 extern "C" void *
2195 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
2196 _Jv_Utf8Const *signature, MAYBE_UNUSED int args_size)
2197 {
2198 int name_length = name->len();
2199 int sig_length = signature->len();
2200 char buf[10 + 6 * (name_length + sig_length) + 12];
2201 int long_start;
2202 void *function;
2203
2204 // Synchronize on something convenient. Right now we use the hash.
2205 JvSynchronize sync (global_ref_table);
2206
2207 // First see if we have an override in the hash table.
2208 strncpy (buf, name->chars (), name_length);
2209 buf[name_length] = '\0';
2210 strncpy (buf + name_length + 1, signature->chars (), sig_length);
2211 buf[name_length + sig_length + 1] = '\0';
2212 NativeMethodCacheEntry meth;
2213 meth.name = buf;
2214 meth.signature = buf + name_length + 1;
2215 meth.className = _Jv_GetClassNameUtf8(klass)->chars();
2216 function = nathash_find (&meth);
2217 if (function != NULL)
2218 return function;
2219
2220 // If there was no override, then look in the symbol table.
2221 buf[0] = '_';
2222 mangled_name (klass, name, signature, buf + 1, &long_start);
2223 char c = buf[long_start + 1];
2224 buf[long_start + 1] = '\0';
2225
2226 function = _Jv_FindSymbolInExecutable (buf + 1);
2227 #ifdef WIN32
2228 // On Win32, we use the "stdcall" calling convention (see JNICALL
2229 // in jni.h).
2230 //
2231 // For a function named 'fooBar' that takes 'nn' bytes as arguments,
2232 // by default, MinGW GCC exports it as 'fooBar@nn', MSVC exports it
2233 // as '_fooBar@nn' and Borland C exports it as 'fooBar'. We try to
2234 // take care of all these variations here.
2235
2236 char asz_buf[12]; /* '@' + '2147483647' (32-bit INT_MAX) + '\0' */
2237 char long_nm_sv[11]; /* Ditto, except for the '\0'. */
2238
2239 if (function == NULL)
2240 {
2241 // We have tried searching for the 'fooBar' form (BCC) - now
2242 // try the others.
2243
2244 // First, save the part of the long name that will be damaged
2245 // by appending '@nn'.
2246 memcpy (long_nm_sv, (buf + long_start + 1 + 1), sizeof (long_nm_sv));
2247
2248 sprintf (asz_buf, "@%d", args_size);
2249 strcat (buf, asz_buf);
2250
2251 // Search for the '_fooBar@nn' form (MSVC).
2252 function = _Jv_FindSymbolInExecutable (buf);
2253
2254 if (function == NULL)
2255 {
2256 // Search for the 'fooBar@nn' form (MinGW GCC).
2257 function = _Jv_FindSymbolInExecutable (buf + 1);
2258 }
2259 }
2260 #endif /* WIN32 */
2261
2262 if (function == NULL)
2263 {
2264 buf[long_start + 1] = c;
2265 #ifdef WIN32
2266 // Restore the part of the long name that was damaged by
2267 // appending the '@nn'.
2268 memcpy ((buf + long_start + 1 + 1), long_nm_sv, sizeof (long_nm_sv));
2269 #endif /* WIN32 */
2270 function = _Jv_FindSymbolInExecutable (buf + 1);
2271 if (function == NULL)
2272 {
2273 #ifdef WIN32
2274 strcat (buf, asz_buf);
2275 function = _Jv_FindSymbolInExecutable (buf);
2276 if (function == NULL)
2277 function = _Jv_FindSymbolInExecutable (buf + 1);
2278
2279 if (function == NULL)
2280 #endif /* WIN32 */
2281 {
2282 jstring str = JvNewStringUTF (name->chars ());
2283 throw new java::lang::UnsatisfiedLinkError (str);
2284 }
2285 }
2286 }
2287
2288 return function;
2289 }
2290
2291 #ifdef INTERPRETER
2292
2293 // This function is the stub which is used to turn an ordinary (CNI)
2294 // method call into a JNI call.
2295 void
2296 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
2297 {
2298 _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
2299
2300 JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
2301
2302 // FIXME: we should mark every reference parameter as a local. For
2303 // now we assume a conservative GC, and we assume that the
2304 // references are on the stack somewhere.
2305
2306 // We cache the value that we find, of course, but if we don't find
2307 // a value we don't cache that fact -- we might subsequently load a
2308 // library which finds the function in question.
2309 {
2310 // Synchronize on a convenient object to ensure sanity in case two
2311 // threads reach this point for the same function at the same
2312 // time.
2313 JvSynchronize sync (global_ref_table);
2314 if (_this->function == NULL)
2315 {
2316 int args_size = sizeof (JNIEnv *) + _this->args_raw_size;
2317
2318 if (_this->self->accflags & java::lang::reflect::Modifier::STATIC)
2319 args_size += sizeof (_this->defining_class);
2320
2321 _this->function = _Jv_LookupJNIMethod (_this->defining_class,
2322 _this->self->name,
2323 _this->self->signature,
2324 args_size);
2325 }
2326 }
2327
2328 JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
2329 ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
2330 int offset = 0;
2331
2332 // First argument is always the environment pointer.
2333 real_args[offset++].ptr = env;
2334
2335 // For a static method, we pass in the Class. For non-static
2336 // methods, the `this' argument is already handled.
2337 if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2338 real_args[offset++].ptr = _this->defining_class;
2339
2340 // In libgcj, the callee synchronizes.
2341 jobject sync = NULL;
2342 if ((_this->self->accflags & java::lang::reflect::Modifier::SYNCHRONIZED))
2343 {
2344 if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2345 sync = _this->defining_class;
2346 else
2347 sync = (jobject) args[0].ptr;
2348 _Jv_MonitorEnter (sync);
2349 }
2350
2351 // Copy over passed-in arguments.
2352 memcpy (&real_args[offset], args, _this->args_raw_size);
2353
2354 // Add a frame to the composite (interpreted + JNI) call stack
2355 java::lang::Thread *thread = java::lang::Thread::currentThread();
2356 _Jv_NativeFrame nat_frame (_this, thread);
2357
2358 // The actual call to the JNI function.
2359 #if FFI_NATIVE_RAW_API
2360 ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2361 ret, real_args);
2362 #else
2363 ffi_java_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2364 ret, real_args);
2365 #endif
2366
2367 // We might need to unwrap a JNI weak reference here.
2368 if (_this->jni_cif.rtype == &ffi_type_pointer)
2369 {
2370 _Jv_value *val = (_Jv_value *) ret;
2371 val->object_value = unwrap (val->object_value);
2372 }
2373
2374 if (sync != NULL)
2375 _Jv_MonitorExit (sync);
2376
2377 _Jv_JNI_PopSystemFrame (env);
2378 }
2379
2380 #endif /* INTERPRETER */
2381
2382 \f
2383
2384 //
2385 // Invocation API.
2386 //
2387
2388 // An internal helper function.
2389 static jint
2390 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv,
2391 void *args, jboolean is_daemon)
2392 {
2393 JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
2394 java::lang::ThreadGroup *group = NULL;
2395
2396 if (attach)
2397 {
2398 // FIXME: do we really want to support 1.1?
2399 if (attach->version != JNI_VERSION_1_4
2400 && attach->version != JNI_VERSION_1_2
2401 && attach->version != JNI_VERSION_1_1)
2402 return JNI_EVERSION;
2403
2404 JvAssert (java::lang::ThreadGroup::class$.isInstance (attach->group));
2405 group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
2406 }
2407
2408 // Attaching an already-attached thread is a no-op.
2409 JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2410 if (env != NULL)
2411 {
2412 *penv = reinterpret_cast<void *> (env);
2413 return 0;
2414 }
2415
2416 env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2417 if (env == NULL)
2418 return JNI_ERR;
2419 env->p = &_Jv_JNIFunctions;
2420 env->ex = NULL;
2421 env->bottom_locals
2422 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2423 + (FRAME_SIZE
2424 * sizeof (jobject)));
2425 env->locals = env->bottom_locals;
2426 if (env->locals == NULL)
2427 {
2428 _Jv_Free (env);
2429 return JNI_ERR;
2430 }
2431
2432 env->locals->allocated_p = false;
2433 env->locals->marker = MARK_SYSTEM;
2434 env->locals->size = FRAME_SIZE;
2435 env->locals->loader = NULL;
2436 env->locals->next = NULL;
2437
2438 for (int i = 0; i < env->locals->size; ++i)
2439 env->locals->vec[i] = NULL;
2440
2441 *penv = reinterpret_cast<void *> (env);
2442
2443 // This thread might already be a Java thread -- this function might
2444 // have been called simply to set the new JNIEnv.
2445 if (_Jv_ThreadCurrent () == NULL)
2446 {
2447 try
2448 {
2449 if (is_daemon)
2450 _Jv_AttachCurrentThreadAsDaemon (name, group);
2451 else
2452 _Jv_AttachCurrentThread (name, group);
2453 }
2454 catch (jthrowable t)
2455 {
2456 return JNI_ERR;
2457 }
2458 }
2459 _Jv_SetCurrentJNIEnv (env);
2460
2461 return 0;
2462 }
2463
2464 // This is the one actually used by JNI.
2465 jint JNICALL
2466 _Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
2467 {
2468 return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, false);
2469 }
2470
2471 static jint JNICALL
2472 _Jv_JNI_AttachCurrentThreadAsDaemon (JavaVM *vm, void **penv,
2473 void *args)
2474 {
2475 return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, true);
2476 }
2477
2478 static jint JNICALL
2479 _Jv_JNI_DestroyJavaVM (JavaVM *vm)
2480 {
2481 JvAssert (_Jv_the_vm && vm == _Jv_the_vm);
2482
2483 union
2484 {
2485 JNIEnv *env;
2486 void *env_p;
2487 };
2488
2489 if (_Jv_ThreadCurrent () != NULL)
2490 {
2491 jstring main_name;
2492 // This sucks.
2493 try
2494 {
2495 main_name = JvNewStringLatin1 ("main");
2496 }
2497 catch (jthrowable t)
2498 {
2499 return JNI_ERR;
2500 }
2501
2502 jint r = _Jv_JNI_AttachCurrentThread (vm, main_name, &env_p,
2503 NULL, false);
2504 if (r < 0)
2505 return r;
2506 }
2507 else
2508 env = _Jv_GetCurrentJNIEnv ();
2509
2510 _Jv_ThreadWait ();
2511
2512 // Docs say that this always returns an error code.
2513 return JNI_ERR;
2514 }
2515
2516 jint JNICALL
2517 _Jv_JNI_DetachCurrentThread (JavaVM *)
2518 {
2519 jint code = _Jv_DetachCurrentThread ();
2520 return code ? JNI_EDETACHED : 0;
2521 }
2522
2523 static jint JNICALL
2524 _Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
2525 {
2526 if (_Jv_ThreadCurrent () == NULL)
2527 {
2528 *penv = NULL;
2529 return JNI_EDETACHED;
2530 }
2531
2532 #ifdef ENABLE_JVMPI
2533 // Handle JVMPI requests.
2534 if (version == JVMPI_VERSION_1)
2535 {
2536 *penv = (void *) &_Jv_JVMPI_Interface;
2537 return 0;
2538 }
2539 #endif
2540
2541 #ifdef INTERPRETER
2542 // Handle JVMTI requests
2543 if (version == JVMTI_VERSION_1_0)
2544 {
2545 *penv = (void *) _Jv_GetJVMTIEnv ();
2546 return 0;
2547 }
2548 #endif
2549
2550 // FIXME: do we really want to support 1.1?
2551 if (version != JNI_VERSION_1_4 && version != JNI_VERSION_1_2
2552 && version != JNI_VERSION_1_1)
2553 {
2554 *penv = NULL;
2555 return JNI_EVERSION;
2556 }
2557
2558 *penv = (void *) _Jv_GetCurrentJNIEnv ();
2559 return 0;
2560 }
2561
2562 JavaVM *
2563 _Jv_GetJavaVM ()
2564 {
2565 // FIXME: synchronize
2566 if (! _Jv_the_vm)
2567 {
2568 JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2569 if (nvm != NULL)
2570 nvm->functions = &_Jv_JNI_InvokeFunctions;
2571 _Jv_the_vm = nvm;
2572 }
2573
2574 // If this is a Java thread, we want to make sure it has an
2575 // associated JNIEnv.
2576 if (_Jv_ThreadCurrent () != NULL)
2577 {
2578 void *ignore;
2579 _Jv_JNI_AttachCurrentThread (_Jv_the_vm, &ignore, NULL);
2580 }
2581
2582 return _Jv_the_vm;
2583 }
2584
2585 static jint JNICALL
2586 _Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
2587 {
2588 *vm = _Jv_GetJavaVM ();
2589 return *vm == NULL ? JNI_ERR : JNI_OK;
2590 }
2591
2592 \f
2593
2594 #define RESERVED NULL
2595
2596 struct JNINativeInterface_ _Jv_JNIFunctions =
2597 {
2598 RESERVED,
2599 RESERVED,
2600 RESERVED,
2601 RESERVED,
2602 _Jv_JNI_GetVersion, // GetVersion
2603 _Jv_JNI_DefineClass, // DefineClass
2604 _Jv_JNI_FindClass, // FindClass
2605 _Jv_JNI_FromReflectedMethod, // FromReflectedMethod
2606 _Jv_JNI_FromReflectedField, // FromReflectedField
2607 _Jv_JNI_ToReflectedMethod, // ToReflectedMethod
2608 _Jv_JNI_GetSuperclass, // GetSuperclass
2609 _Jv_JNI_IsAssignableFrom, // IsAssignableFrom
2610 _Jv_JNI_ToReflectedField, // ToReflectedField
2611 _Jv_JNI_Throw, // Throw
2612 _Jv_JNI_ThrowNew, // ThrowNew
2613 _Jv_JNI_ExceptionOccurred, // ExceptionOccurred
2614 _Jv_JNI_ExceptionDescribe, // ExceptionDescribe
2615 _Jv_JNI_ExceptionClear, // ExceptionClear
2616 _Jv_JNI_FatalError, // FatalError
2617
2618 _Jv_JNI_PushLocalFrame, // PushLocalFrame
2619 _Jv_JNI_PopLocalFrame, // PopLocalFrame
2620 _Jv_JNI_NewGlobalRef, // NewGlobalRef
2621 _Jv_JNI_DeleteGlobalRef, // DeleteGlobalRef
2622 _Jv_JNI_DeleteLocalRef, // DeleteLocalRef
2623
2624 _Jv_JNI_IsSameObject, // IsSameObject
2625
2626 _Jv_JNI_NewLocalRef, // NewLocalRef
2627 _Jv_JNI_EnsureLocalCapacity, // EnsureLocalCapacity
2628
2629 _Jv_JNI_AllocObject, // AllocObject
2630 _Jv_JNI_NewObject, // NewObject
2631 _Jv_JNI_NewObjectV, // NewObjectV
2632 _Jv_JNI_NewObjectA, // NewObjectA
2633 _Jv_JNI_GetObjectClass, // GetObjectClass
2634 _Jv_JNI_IsInstanceOf, // IsInstanceOf
2635 _Jv_JNI_GetAnyMethodID<false>, // GetMethodID
2636
2637 _Jv_JNI_CallMethod<jobject>, // CallObjectMethod
2638 _Jv_JNI_CallMethodV<jobject>, // CallObjectMethodV
2639 _Jv_JNI_CallMethodA<jobject>, // CallObjectMethodA
2640 _Jv_JNI_CallMethod<jboolean>, // CallBooleanMethod
2641 _Jv_JNI_CallMethodV<jboolean>, // CallBooleanMethodV
2642 _Jv_JNI_CallMethodA<jboolean>, // CallBooleanMethodA
2643 _Jv_JNI_CallMethod<jbyte>, // CallByteMethod
2644 _Jv_JNI_CallMethodV<jbyte>, // CallByteMethodV
2645 _Jv_JNI_CallMethodA<jbyte>, // CallByteMethodA
2646 _Jv_JNI_CallMethod<jchar>, // CallCharMethod
2647 _Jv_JNI_CallMethodV<jchar>, // CallCharMethodV
2648 _Jv_JNI_CallMethodA<jchar>, // CallCharMethodA
2649 _Jv_JNI_CallMethod<jshort>, // CallShortMethod
2650 _Jv_JNI_CallMethodV<jshort>, // CallShortMethodV
2651 _Jv_JNI_CallMethodA<jshort>, // CallShortMethodA
2652 _Jv_JNI_CallMethod<jint>, // CallIntMethod
2653 _Jv_JNI_CallMethodV<jint>, // CallIntMethodV
2654 _Jv_JNI_CallMethodA<jint>, // CallIntMethodA
2655 _Jv_JNI_CallMethod<jlong>, // CallLongMethod
2656 _Jv_JNI_CallMethodV<jlong>, // CallLongMethodV
2657 _Jv_JNI_CallMethodA<jlong>, // CallLongMethodA
2658 _Jv_JNI_CallMethod<jfloat>, // CallFloatMethod
2659 _Jv_JNI_CallMethodV<jfloat>, // CallFloatMethodV
2660 _Jv_JNI_CallMethodA<jfloat>, // CallFloatMethodA
2661 _Jv_JNI_CallMethod<jdouble>, // CallDoubleMethod
2662 _Jv_JNI_CallMethodV<jdouble>, // CallDoubleMethodV
2663 _Jv_JNI_CallMethodA<jdouble>, // CallDoubleMethodA
2664 _Jv_JNI_CallVoidMethod, // CallVoidMethod
2665 _Jv_JNI_CallVoidMethodV, // CallVoidMethodV
2666 _Jv_JNI_CallVoidMethodA, // CallVoidMethodA
2667
2668 // Nonvirtual method invocation functions follow.
2669 _Jv_JNI_CallAnyMethod<jobject, nonvirtual>, // CallNonvirtualObjectMethod
2670 _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>, // CallNonvirtualObjectMethodV
2671 _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>, // CallNonvirtualObjectMethodA
2672 _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>, // CallNonvirtualBooleanMethod
2673 _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2674 _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2675 _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>, // CallNonvirtualByteMethod
2676 _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>, // CallNonvirtualByteMethodV
2677 _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>, // CallNonvirtualByteMethodA
2678 _Jv_JNI_CallAnyMethod<jchar, nonvirtual>, // CallNonvirtualCharMethod
2679 _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>, // CallNonvirtualCharMethodV
2680 _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>, // CallNonvirtualCharMethodA
2681 _Jv_JNI_CallAnyMethod<jshort, nonvirtual>, // CallNonvirtualShortMethod
2682 _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>, // CallNonvirtualShortMethodV
2683 _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>, // CallNonvirtualShortMethodA
2684 _Jv_JNI_CallAnyMethod<jint, nonvirtual>, // CallNonvirtualIntMethod
2685 _Jv_JNI_CallAnyMethodV<jint, nonvirtual>, // CallNonvirtualIntMethodV
2686 _Jv_JNI_CallAnyMethodA<jint, nonvirtual>, // CallNonvirtualIntMethodA
2687 _Jv_JNI_CallAnyMethod<jlong, nonvirtual>, // CallNonvirtualLongMethod
2688 _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>, // CallNonvirtualLongMethodV
2689 _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>, // CallNonvirtualLongMethodA
2690 _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>, // CallNonvirtualFloatMethod
2691 _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>, // CallNonvirtualFloatMethodV
2692 _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>, // CallNonvirtualFloatMethodA
2693 _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>, // CallNonvirtualDoubleMethod
2694 _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodV
2695 _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodA
2696 _Jv_JNI_CallAnyVoidMethod<nonvirtual>, // CallNonvirtualVoidMethod
2697 _Jv_JNI_CallAnyVoidMethodV<nonvirtual>, // CallNonvirtualVoidMethodV
2698 _Jv_JNI_CallAnyVoidMethodA<nonvirtual>, // CallNonvirtualVoidMethodA
2699
2700 _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2701 _Jv_JNI_GetField<jobject>, // GetObjectField
2702 _Jv_JNI_GetField<jboolean>, // GetBooleanField
2703 _Jv_JNI_GetField<jbyte>, // GetByteField
2704 _Jv_JNI_GetField<jchar>, // GetCharField
2705 _Jv_JNI_GetField<jshort>, // GetShortField
2706 _Jv_JNI_GetField<jint>, // GetIntField
2707 _Jv_JNI_GetField<jlong>, // GetLongField
2708 _Jv_JNI_GetField<jfloat>, // GetFloatField
2709 _Jv_JNI_GetField<jdouble>, // GetDoubleField
2710 _Jv_JNI_SetField, // SetObjectField
2711 _Jv_JNI_SetField, // SetBooleanField
2712 _Jv_JNI_SetField, // SetByteField
2713 _Jv_JNI_SetField, // SetCharField
2714 _Jv_JNI_SetField, // SetShortField
2715 _Jv_JNI_SetField, // SetIntField
2716 _Jv_JNI_SetField, // SetLongField
2717 _Jv_JNI_SetField, // SetFloatField
2718 _Jv_JNI_SetField, // SetDoubleField
2719 _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2720
2721 _Jv_JNI_CallStaticMethod<jobject>, // CallStaticObjectMethod
2722 _Jv_JNI_CallStaticMethodV<jobject>, // CallStaticObjectMethodV
2723 _Jv_JNI_CallStaticMethodA<jobject>, // CallStaticObjectMethodA
2724 _Jv_JNI_CallStaticMethod<jboolean>, // CallStaticBooleanMethod
2725 _Jv_JNI_CallStaticMethodV<jboolean>, // CallStaticBooleanMethodV
2726 _Jv_JNI_CallStaticMethodA<jboolean>, // CallStaticBooleanMethodA
2727 _Jv_JNI_CallStaticMethod<jbyte>, // CallStaticByteMethod
2728 _Jv_JNI_CallStaticMethodV<jbyte>, // CallStaticByteMethodV
2729 _Jv_JNI_CallStaticMethodA<jbyte>, // CallStaticByteMethodA
2730 _Jv_JNI_CallStaticMethod<jchar>, // CallStaticCharMethod
2731 _Jv_JNI_CallStaticMethodV<jchar>, // CallStaticCharMethodV
2732 _Jv_JNI_CallStaticMethodA<jchar>, // CallStaticCharMethodA
2733 _Jv_JNI_CallStaticMethod<jshort>, // CallStaticShortMethod
2734 _Jv_JNI_CallStaticMethodV<jshort>, // CallStaticShortMethodV
2735 _Jv_JNI_CallStaticMethodA<jshort>, // CallStaticShortMethodA
2736 _Jv_JNI_CallStaticMethod<jint>, // CallStaticIntMethod
2737 _Jv_JNI_CallStaticMethodV<jint>, // CallStaticIntMethodV
2738 _Jv_JNI_CallStaticMethodA<jint>, // CallStaticIntMethodA
2739 _Jv_JNI_CallStaticMethod<jlong>, // CallStaticLongMethod
2740 _Jv_JNI_CallStaticMethodV<jlong>, // CallStaticLongMethodV
2741 _Jv_JNI_CallStaticMethodA<jlong>, // CallStaticLongMethodA
2742 _Jv_JNI_CallStaticMethod<jfloat>, // CallStaticFloatMethod
2743 _Jv_JNI_CallStaticMethodV<jfloat>, // CallStaticFloatMethodV
2744 _Jv_JNI_CallStaticMethodA<jfloat>, // CallStaticFloatMethodA
2745 _Jv_JNI_CallStaticMethod<jdouble>, // CallStaticDoubleMethod
2746 _Jv_JNI_CallStaticMethodV<jdouble>, // CallStaticDoubleMethodV
2747 _Jv_JNI_CallStaticMethodA<jdouble>, // CallStaticDoubleMethodA
2748 _Jv_JNI_CallStaticVoidMethod, // CallStaticVoidMethod
2749 _Jv_JNI_CallStaticVoidMethodV, // CallStaticVoidMethodV
2750 _Jv_JNI_CallStaticVoidMethodA, // CallStaticVoidMethodA
2751
2752 _Jv_JNI_GetAnyFieldID<true>, // GetStaticFieldID
2753 _Jv_JNI_GetStaticField<jobject>, // GetStaticObjectField
2754 _Jv_JNI_GetStaticField<jboolean>, // GetStaticBooleanField
2755 _Jv_JNI_GetStaticField<jbyte>, // GetStaticByteField
2756 _Jv_JNI_GetStaticField<jchar>, // GetStaticCharField
2757 _Jv_JNI_GetStaticField<jshort>, // GetStaticShortField
2758 _Jv_JNI_GetStaticField<jint>, // GetStaticIntField
2759 _Jv_JNI_GetStaticField<jlong>, // GetStaticLongField
2760 _Jv_JNI_GetStaticField<jfloat>, // GetStaticFloatField
2761 _Jv_JNI_GetStaticField<jdouble>, // GetStaticDoubleField
2762 _Jv_JNI_SetStaticField, // SetStaticObjectField
2763 _Jv_JNI_SetStaticField, // SetStaticBooleanField
2764 _Jv_JNI_SetStaticField, // SetStaticByteField
2765 _Jv_JNI_SetStaticField, // SetStaticCharField
2766 _Jv_JNI_SetStaticField, // SetStaticShortField
2767 _Jv_JNI_SetStaticField, // SetStaticIntField
2768 _Jv_JNI_SetStaticField, // SetStaticLongField
2769 _Jv_JNI_SetStaticField, // SetStaticFloatField
2770 _Jv_JNI_SetStaticField, // SetStaticDoubleField
2771 _Jv_JNI_NewString, // NewString
2772 _Jv_JNI_GetStringLength, // GetStringLength
2773 _Jv_JNI_GetStringChars, // GetStringChars
2774 _Jv_JNI_ReleaseStringChars, // ReleaseStringChars
2775 _Jv_JNI_NewStringUTF, // NewStringUTF
2776 _Jv_JNI_GetStringUTFLength, // GetStringUTFLength
2777 _Jv_JNI_GetStringUTFChars, // GetStringUTFChars
2778 _Jv_JNI_ReleaseStringUTFChars, // ReleaseStringUTFChars
2779 _Jv_JNI_GetArrayLength, // GetArrayLength
2780 _Jv_JNI_NewObjectArray, // NewObjectArray
2781 _Jv_JNI_GetObjectArrayElement, // GetObjectArrayElement
2782 _Jv_JNI_SetObjectArrayElement, // SetObjectArrayElement
2783 _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2784 // NewBooleanArray
2785 _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>, // NewByteArray
2786 _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>, // NewCharArray
2787 _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>, // NewShortArray
2788 _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>, // NewIntArray
2789 _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>, // NewLongArray
2790 _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>, // NewFloatArray
2791 _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2792 _Jv_JNI_GetPrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2793 // GetBooleanArrayElements
2794 _Jv_JNI_GetPrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2795 // GetByteArrayElements
2796 _Jv_JNI_GetPrimitiveArrayElements<jchar, JvPrimClass (char)>,
2797 // GetCharArrayElements
2798 _Jv_JNI_GetPrimitiveArrayElements<jshort, JvPrimClass (short)>,
2799 // GetShortArrayElements
2800 _Jv_JNI_GetPrimitiveArrayElements<jint, JvPrimClass (int)>,
2801 // GetIntArrayElements
2802 _Jv_JNI_GetPrimitiveArrayElements<jlong, JvPrimClass (long)>,
2803 // GetLongArrayElements
2804 _Jv_JNI_GetPrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2805 // GetFloatArrayElements
2806 _Jv_JNI_GetPrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2807 // GetDoubleArrayElements
2808 _Jv_JNI_ReleasePrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2809 // ReleaseBooleanArrayElements
2810 _Jv_JNI_ReleasePrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2811 // ReleaseByteArrayElements
2812 _Jv_JNI_ReleasePrimitiveArrayElements<jchar, JvPrimClass (char)>,
2813 // ReleaseCharArrayElements
2814 _Jv_JNI_ReleasePrimitiveArrayElements<jshort, JvPrimClass (short)>,
2815 // ReleaseShortArrayElements
2816 _Jv_JNI_ReleasePrimitiveArrayElements<jint, JvPrimClass (int)>,
2817 // ReleaseIntArrayElements
2818 _Jv_JNI_ReleasePrimitiveArrayElements<jlong, JvPrimClass (long)>,
2819 // ReleaseLongArrayElements
2820 _Jv_JNI_ReleasePrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2821 // ReleaseFloatArrayElements
2822 _Jv_JNI_ReleasePrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2823 // ReleaseDoubleArrayElements
2824 _Jv_JNI_GetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2825 // GetBooleanArrayRegion
2826 _Jv_JNI_GetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2827 // GetByteArrayRegion
2828 _Jv_JNI_GetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2829 // GetCharArrayRegion
2830 _Jv_JNI_GetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2831 // GetShortArrayRegion
2832 _Jv_JNI_GetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2833 // GetIntArrayRegion
2834 _Jv_JNI_GetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2835 // GetLongArrayRegion
2836 _Jv_JNI_GetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2837 // GetFloatArrayRegion
2838 _Jv_JNI_GetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2839 // GetDoubleArrayRegion
2840 _Jv_JNI_SetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2841 // SetBooleanArrayRegion
2842 _Jv_JNI_SetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2843 // SetByteArrayRegion
2844 _Jv_JNI_SetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2845 // SetCharArrayRegion
2846 _Jv_JNI_SetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2847 // SetShortArrayRegion
2848 _Jv_JNI_SetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2849 // SetIntArrayRegion
2850 _Jv_JNI_SetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2851 // SetLongArrayRegion
2852 _Jv_JNI_SetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2853 // SetFloatArrayRegion
2854 _Jv_JNI_SetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2855 // SetDoubleArrayRegion
2856 _Jv_JNI_RegisterNatives, // RegisterNatives
2857 _Jv_JNI_UnregisterNatives, // UnregisterNatives
2858 _Jv_JNI_MonitorEnter, // MonitorEnter
2859 _Jv_JNI_MonitorExit, // MonitorExit
2860 _Jv_JNI_GetJavaVM, // GetJavaVM
2861
2862 _Jv_JNI_GetStringRegion, // GetStringRegion
2863 _Jv_JNI_GetStringUTFRegion, // GetStringUTFRegion
2864 _Jv_JNI_GetPrimitiveArrayCritical, // GetPrimitiveArrayCritical
2865 _Jv_JNI_ReleasePrimitiveArrayCritical, // ReleasePrimitiveArrayCritical
2866 _Jv_JNI_GetStringCritical, // GetStringCritical
2867 _Jv_JNI_ReleaseStringCritical, // ReleaseStringCritical
2868
2869 _Jv_JNI_NewWeakGlobalRef, // NewWeakGlobalRef
2870 _Jv_JNI_DeleteWeakGlobalRef, // DeleteWeakGlobalRef
2871
2872 _Jv_JNI_ExceptionCheck, // ExceptionCheck
2873
2874 _Jv_JNI_NewDirectByteBuffer, // NewDirectByteBuffer
2875 _Jv_JNI_GetDirectBufferAddress, // GetDirectBufferAddress
2876 _Jv_JNI_GetDirectBufferCapacity // GetDirectBufferCapacity
2877 };
2878
2879 struct JNIInvokeInterface_ _Jv_JNI_InvokeFunctions =
2880 {
2881 RESERVED,
2882 RESERVED,
2883 RESERVED,
2884
2885 _Jv_JNI_DestroyJavaVM,
2886 _Jv_JNI_AttachCurrentThread,
2887 _Jv_JNI_DetachCurrentThread,
2888 _Jv_JNI_GetEnv,
2889 _Jv_JNI_AttachCurrentThreadAsDaemon
2890 };
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