* raise.c (get_action_description_for): Fix typo in last change.
[official-gcc.git] / libjava / jni.cc
blobe2e10defd0a8cfefe4b2be6c3c9c7b92dd381632
1 // jni.cc - JNI implementation, including the jump table.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
9 details. */
11 #include <config.h>
13 #include <stdio.h>
14 #include <stddef.h>
15 #include <string.h>
17 #include <gcj/cni.h>
18 #include <jvm.h>
19 #include <java-assert.h>
20 #include <jni.h>
21 #ifdef ENABLE_JVMPI
22 #include <jvmpi.h>
23 #endif
25 #include <java/lang/Class.h>
26 #include <java/lang/ClassLoader.h>
27 #include <java/lang/Throwable.h>
28 #include <java/lang/ArrayIndexOutOfBoundsException.h>
29 #include <java/lang/StringIndexOutOfBoundsException.h>
30 #include <java/lang/UnsatisfiedLinkError.h>
31 #include <java/lang/InstantiationException.h>
32 #include <java/lang/NoSuchFieldError.h>
33 #include <java/lang/NoSuchMethodError.h>
34 #include <java/lang/reflect/Constructor.h>
35 #include <java/lang/reflect/Method.h>
36 #include <java/lang/reflect/Modifier.h>
37 #include <java/lang/OutOfMemoryError.h>
38 #include <java/lang/Integer.h>
39 #include <java/lang/ThreadGroup.h>
40 #include <java/lang/Thread.h>
41 #include <java/lang/IllegalAccessError.h>
42 #include <java/nio/DirectByteBufferImpl.h>
43 #include <java/util/IdentityHashMap.h>
44 #include <gnu/gcj/RawData.h>
46 #include <gcj/method.h>
47 #include <gcj/field.h>
49 #include <java-interp.h>
50 #include <java-threads.h>
52 using namespace gcj;
54 // This enum is used to select different template instantiations in
55 // the invocation code.
56 enum invocation_type
58 normal,
59 nonvirtual,
60 static_type,
61 constructor
64 // Forward declarations.
65 extern struct JNINativeInterface _Jv_JNIFunctions;
66 extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
68 // Number of slots in the default frame. The VM must allow at least
69 // 16.
70 #define FRAME_SIZE 32
72 // Mark value indicating this is an overflow frame.
73 #define MARK_NONE 0
74 // Mark value indicating this is a user frame.
75 #define MARK_USER 1
76 // Mark value indicating this is a system frame.
77 #define MARK_SYSTEM 2
79 // This structure is used to keep track of local references.
80 struct _Jv_JNI_LocalFrame
82 // This is true if this frame object represents a pushed frame (eg
83 // from PushLocalFrame).
84 int marker : 2;
86 // Number of elements in frame.
87 int size : 30;
89 // Next frame in chain.
90 _Jv_JNI_LocalFrame *next;
92 // The elements. These are allocated using the C "struct hack".
93 jobject vec[0];
96 // This holds a reference count for all local references.
97 static java::util::IdentityHashMap *local_ref_table;
98 // This holds a reference count for all global references.
99 static java::util::IdentityHashMap *global_ref_table;
101 // The only VM.
102 static JavaVM *the_vm;
104 #ifdef ENABLE_JVMPI
105 // The only JVMPI interface description.
106 static JVMPI_Interface _Jv_JVMPI_Interface;
108 static jint
109 jvmpiEnableEvent (jint event_type, void *)
111 switch (event_type)
113 case JVMPI_EVENT_OBJECT_ALLOC:
114 _Jv_JVMPI_Notify_OBJECT_ALLOC = _Jv_JVMPI_Interface.NotifyEvent;
115 break;
117 case JVMPI_EVENT_THREAD_START:
118 _Jv_JVMPI_Notify_THREAD_START = _Jv_JVMPI_Interface.NotifyEvent;
119 break;
121 case JVMPI_EVENT_THREAD_END:
122 _Jv_JVMPI_Notify_THREAD_END = _Jv_JVMPI_Interface.NotifyEvent;
123 break;
125 default:
126 return JVMPI_NOT_AVAILABLE;
129 return JVMPI_SUCCESS;
132 static jint
133 jvmpiDisableEvent (jint event_type, void *)
135 switch (event_type)
137 case JVMPI_EVENT_OBJECT_ALLOC:
138 _Jv_JVMPI_Notify_OBJECT_ALLOC = NULL;
139 break;
141 default:
142 return JVMPI_NOT_AVAILABLE;
145 return JVMPI_SUCCESS;
147 #endif
151 void
152 _Jv_JNI_Init (void)
154 local_ref_table = new java::util::IdentityHashMap;
155 global_ref_table = new java::util::IdentityHashMap;
157 #ifdef ENABLE_JVMPI
158 _Jv_JVMPI_Interface.version = 1;
159 _Jv_JVMPI_Interface.EnableEvent = &jvmpiEnableEvent;
160 _Jv_JVMPI_Interface.DisableEvent = &jvmpiDisableEvent;
161 _Jv_JVMPI_Interface.EnableGC = &_Jv_EnableGC;
162 _Jv_JVMPI_Interface.DisableGC = &_Jv_DisableGC;
163 _Jv_JVMPI_Interface.RunGC = &_Jv_RunGC;
164 #endif
167 // Tell the GC that a certain pointer is live.
168 static void
169 mark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
171 JvSynchronize sync (ref_table);
173 using namespace java::lang;
174 Integer *refcount = (Integer *) ref_table->get (obj);
175 jint val = (refcount == NULL) ? 0 : refcount->intValue ();
176 // FIXME: what about out of memory error?
177 ref_table->put (obj, new Integer (val + 1));
180 // Unmark a pointer.
181 static void
182 unmark_for_gc (jobject obj, java::util::IdentityHashMap *ref_table)
184 JvSynchronize sync (ref_table);
186 using namespace java::lang;
187 Integer *refcount = (Integer *) ref_table->get (obj);
188 JvAssert (refcount);
189 jint val = refcount->intValue () - 1;
190 JvAssert (val >= 0);
191 if (val == 0)
192 ref_table->remove (obj);
193 else
194 // FIXME: what about out of memory error?
195 ref_table->put (obj, new Integer (val));
198 // "Unwrap" some random non-reference type. This exists to simplify
199 // other template functions.
200 template<typename T>
201 static T
202 unwrap (T val)
204 return val;
207 // Unwrap a weak reference, if required.
208 template<typename T>
209 static T *
210 unwrap (T *obj)
212 using namespace gnu::gcj::runtime;
213 // We can compare the class directly because JNIWeakRef is `final'.
214 // Doing it this way is much faster.
215 if (obj == NULL || obj->getClass () != &JNIWeakRef::class$)
216 return obj;
217 JNIWeakRef *wr = reinterpret_cast<JNIWeakRef *> (obj);
218 return reinterpret_cast<T *> (wr->get ());
223 static jobject
224 (JNICALL _Jv_JNI_NewGlobalRef) (JNIEnv *, jobject obj)
226 // This seems weird but I think it is correct.
227 obj = unwrap (obj);
228 mark_for_gc (obj, global_ref_table);
229 return obj;
232 static void
233 (JNICALL _Jv_JNI_DeleteGlobalRef) (JNIEnv *, jobject obj)
235 // This seems weird but I think it is correct.
236 obj = unwrap (obj);
237 unmark_for_gc (obj, global_ref_table);
240 static void
241 (JNICALL _Jv_JNI_DeleteLocalRef) (JNIEnv *env, jobject obj)
243 _Jv_JNI_LocalFrame *frame;
245 // This seems weird but I think it is correct.
246 obj = unwrap (obj);
248 for (frame = env->locals; frame != NULL; frame = frame->next)
250 for (int i = 0; i < frame->size; ++i)
252 if (frame->vec[i] == obj)
254 frame->vec[i] = NULL;
255 unmark_for_gc (obj, local_ref_table);
256 return;
260 // Don't go past a marked frame.
261 JvAssert (frame->marker == MARK_NONE);
264 JvAssert (0);
267 static jint
268 (JNICALL _Jv_JNI_EnsureLocalCapacity) (JNIEnv *env, jint size)
270 // It is easier to just always allocate a new frame of the requested
271 // size. This isn't the most efficient thing, but for now we don't
272 // care. Note that _Jv_JNI_PushLocalFrame relies on this right now.
274 _Jv_JNI_LocalFrame *frame;
277 frame = (_Jv_JNI_LocalFrame *) _Jv_Malloc (sizeof (_Jv_JNI_LocalFrame)
278 + size * sizeof (jobject));
280 catch (jthrowable t)
282 env->ex = t;
283 return JNI_ERR;
286 frame->marker = MARK_NONE;
287 frame->size = size;
288 memset (&frame->vec[0], 0, size * sizeof (jobject));
289 frame->next = env->locals;
290 env->locals = frame;
292 return 0;
295 static jint
296 (JNICALL _Jv_JNI_PushLocalFrame) (JNIEnv *env, jint size)
298 jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
299 if (r < 0)
300 return r;
302 // The new frame is on top.
303 env->locals->marker = MARK_USER;
305 return 0;
308 static jobject
309 (JNICALL _Jv_JNI_NewLocalRef) (JNIEnv *env, jobject obj)
311 // This seems weird but I think it is correct.
312 obj = unwrap (obj);
314 // Try to find an open slot somewhere in the topmost frame.
315 _Jv_JNI_LocalFrame *frame = env->locals;
316 bool done = false, set = false;
317 for (; frame != NULL && ! done; frame = frame->next)
319 for (int i = 0; i < frame->size; ++i)
321 if (frame->vec[i] == NULL)
323 set = true;
324 done = true;
325 frame->vec[i] = obj;
326 break;
330 // If we found a slot, or if the frame we just searched is the
331 // mark frame, then we are done.
332 if (done || frame == NULL || frame->marker != MARK_NONE)
333 break;
336 if (! set)
338 // No slots, so we allocate a new frame. According to the spec
339 // we could just die here. FIXME: return value.
340 _Jv_JNI_EnsureLocalCapacity (env, 16);
341 // We know the first element of the new frame will be ok.
342 env->locals->vec[0] = obj;
345 mark_for_gc (obj, local_ref_table);
346 return obj;
349 static jobject
350 (JNICALL _Jv_JNI_PopLocalFrame) (JNIEnv *env, jobject result, int stop)
352 _Jv_JNI_LocalFrame *rf = env->locals;
354 bool done = false;
355 while (rf != NULL && ! done)
357 for (int i = 0; i < rf->size; ++i)
358 if (rf->vec[i] != NULL)
359 unmark_for_gc (rf->vec[i], local_ref_table);
361 // If the frame we just freed is the marker frame, we are done.
362 done = (rf->marker == stop);
364 _Jv_JNI_LocalFrame *n = rf->next;
365 // When N==NULL, we've reached the stack-allocated frame, and we
366 // must not free it. However, we must be sure to clear all its
367 // elements, since we might conceivably reuse it.
368 if (n == NULL)
370 memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
371 break;
374 _Jv_Free (rf);
375 rf = n;
378 // Update the local frame information.
379 env->locals = rf;
381 return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
384 static jobject
385 (JNICALL _Jv_JNI_PopLocalFrame) (JNIEnv *env, jobject result)
387 return _Jv_JNI_PopLocalFrame (env, result, MARK_USER);
390 // Make sure an array's type is compatible with the type of the
391 // destination.
392 template<typename T>
393 static bool
394 _Jv_JNI_check_types (JNIEnv *env, JArray<T> *array, jclass K)
396 jclass klass = array->getClass()->getComponentType();
397 if (__builtin_expect (klass != K, false))
399 env->ex = new java::lang::IllegalAccessError ();
400 return false;
402 else
403 return true;
406 // Pop a `system' frame from the stack. This is `extern "C"' as it is
407 // used by the compiler.
408 extern "C" void
409 _Jv_JNI_PopSystemFrame (JNIEnv *env)
411 _Jv_JNI_PopLocalFrame (env, NULL, MARK_SYSTEM);
413 if (env->ex)
415 jthrowable t = env->ex;
416 env->ex = NULL;
417 throw t;
421 template<typename T> T extract_from_jvalue(jvalue const & t);
422 template<> jboolean extract_from_jvalue(jvalue const & jv) { return jv.z; }
423 template<> jbyte extract_from_jvalue(jvalue const & jv) { return jv.b; }
424 template<> jchar extract_from_jvalue(jvalue const & jv) { return jv.c; }
425 template<> jshort extract_from_jvalue(jvalue const & jv) { return jv.s; }
426 template<> jint extract_from_jvalue(jvalue const & jv) { return jv.i; }
427 template<> jlong extract_from_jvalue(jvalue const & jv) { return jv.j; }
428 template<> jfloat extract_from_jvalue(jvalue const & jv) { return jv.f; }
429 template<> jdouble extract_from_jvalue(jvalue const & jv) { return jv.d; }
430 template<> jobject extract_from_jvalue(jvalue const & jv) { return jv.l; }
433 // This function is used from other template functions. It wraps the
434 // return value appropriately; we specialize it so that object returns
435 // are turned into local references.
436 template<typename T>
437 static T
438 wrap_value (JNIEnv *, T value)
440 return value;
443 // This specialization is used for jobject, jclass, jstring, jarray,
444 // etc.
445 template<typename R, typename T>
446 static T *
447 wrap_value (JNIEnv *env, T *value)
449 return (value == NULL
450 ? value
451 : (T *) _Jv_JNI_NewLocalRef (env, (jobject) value));
456 static jint
457 (JNICALL _Jv_JNI_GetVersion) (JNIEnv *)
459 return JNI_VERSION_1_4;
462 static jclass
463 (JNICALL _Jv_JNI_DefineClass) (JNIEnv *env, const char *name, jobject loader,
464 const jbyte *buf, jsize bufLen)
468 loader = unwrap (loader);
470 jstring sname = JvNewStringUTF (name);
471 jbyteArray bytes = JvNewByteArray (bufLen);
473 jbyte *elts = elements (bytes);
474 memcpy (elts, buf, bufLen * sizeof (jbyte));
476 java::lang::ClassLoader *l
477 = reinterpret_cast<java::lang::ClassLoader *> (loader);
479 jclass result = l->defineClass (sname, bytes, 0, bufLen);
480 return (jclass) wrap_value (env, result);
482 catch (jthrowable t)
484 env->ex = t;
485 return NULL;
489 static jclass
490 (JNICALL _Jv_JNI_FindClass) (JNIEnv *env, const char *name)
492 // FIXME: assume that NAME isn't too long.
493 int len = strlen (name);
494 char s[len + 1];
495 for (int i = 0; i <= len; ++i)
496 s[i] = (name[i] == '/') ? '.' : name[i];
498 jclass r = NULL;
501 // This might throw an out of memory exception.
502 jstring n = JvNewStringUTF (s);
504 java::lang::ClassLoader *loader = NULL;
505 if (env->klass != NULL)
506 loader = env->klass->getClassLoaderInternal ();
508 if (loader == NULL)
510 // FIXME: should use getBaseClassLoader, but we don't have that
511 // yet.
512 loader = java::lang::ClassLoader::getSystemClassLoader ();
515 r = loader->loadClass (n);
517 catch (jthrowable t)
519 env->ex = t;
522 return (jclass) wrap_value (env, r);
525 static jclass
526 (JNICALL _Jv_JNI_GetSuperclass) (JNIEnv *env, jclass clazz)
528 return (jclass) wrap_value (env, unwrap (clazz)->getSuperclass ());
531 static jboolean
532 (JNICALL _Jv_JNI_IsAssignableFrom) (JNIEnv *, jclass clazz1, jclass clazz2)
534 return unwrap (clazz1)->isAssignableFrom (unwrap (clazz2));
537 static jint
538 (JNICALL _Jv_JNI_Throw) (JNIEnv *env, jthrowable obj)
540 // We check in case the user did some funky cast.
541 obj = unwrap (obj);
542 JvAssert (obj != NULL && java::lang::Throwable::class$.isInstance (obj));
543 env->ex = obj;
544 return 0;
547 static jint
548 (JNICALL _Jv_JNI_ThrowNew) (JNIEnv *env, jclass clazz, const char *message)
550 using namespace java::lang::reflect;
552 clazz = unwrap (clazz);
553 JvAssert (java::lang::Throwable::class$.isAssignableFrom (clazz));
555 int r = JNI_OK;
558 JArray<jclass> *argtypes
559 = (JArray<jclass> *) JvNewObjectArray (1, &java::lang::Class::class$,
560 NULL);
562 jclass *elts = elements (argtypes);
563 elts[0] = &StringClass;
565 Constructor *cons = clazz->getConstructor (argtypes);
567 jobjectArray values = JvNewObjectArray (1, &StringClass, NULL);
568 jobject *velts = elements (values);
569 velts[0] = JvNewStringUTF (message);
571 jobject obj = cons->newInstance (values);
573 env->ex = reinterpret_cast<jthrowable> (obj);
575 catch (jthrowable t)
577 env->ex = t;
578 r = JNI_ERR;
581 return r;
584 static jthrowable
585 (JNICALL _Jv_JNI_ExceptionOccurred) (JNIEnv *env)
587 return (jthrowable) wrap_value (env, env->ex);
590 static void
591 (JNICALL _Jv_JNI_ExceptionDescribe) (JNIEnv *env)
593 if (env->ex != NULL)
594 env->ex->printStackTrace();
597 static void
598 (JNICALL _Jv_JNI_ExceptionClear) (JNIEnv *env)
600 env->ex = NULL;
603 static jboolean
604 (JNICALL _Jv_JNI_ExceptionCheck) (JNIEnv *env)
606 return env->ex != NULL;
609 static void
610 (JNICALL _Jv_JNI_FatalError) (JNIEnv *, const char *message)
612 JvFail (message);
617 static jboolean
618 (JNICALL _Jv_JNI_IsSameObject) (JNIEnv *, jobject obj1, jobject obj2)
620 return unwrap (obj1) == unwrap (obj2);
623 static jobject
624 (JNICALL _Jv_JNI_AllocObject) (JNIEnv *env, jclass clazz)
626 jobject obj = NULL;
627 using namespace java::lang::reflect;
631 clazz = unwrap (clazz);
632 JvAssert (clazz && ! clazz->isArray ());
633 if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
634 env->ex = new java::lang::InstantiationException ();
635 else
636 obj = JvAllocObject (clazz);
638 catch (jthrowable t)
640 env->ex = t;
643 return wrap_value (env, obj);
646 static jclass
647 (JNICALL _Jv_JNI_GetObjectClass) (JNIEnv *env, jobject obj)
649 obj = unwrap (obj);
650 JvAssert (obj);
651 return (jclass) wrap_value (env, obj->getClass());
654 static jboolean
655 (JNICALL _Jv_JNI_IsInstanceOf) (JNIEnv *, jobject obj, jclass clazz)
657 return unwrap (clazz)->isInstance(unwrap (obj));
663 // This section concerns method invocation.
666 template<jboolean is_static>
667 static jmethodID
668 (JNICALL _Jv_JNI_GetAnyMethodID) (JNIEnv *env, jclass clazz,
669 const char *name, const char *sig)
673 clazz = unwrap (clazz);
674 _Jv_InitClass (clazz);
676 _Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
678 // FIXME: assume that SIG isn't too long.
679 int len = strlen (sig);
680 char s[len + 1];
681 for (int i = 0; i <= len; ++i)
682 s[i] = (sig[i] == '/') ? '.' : sig[i];
683 _Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) s, -1);
685 JvAssert (! clazz->isPrimitive());
687 using namespace java::lang::reflect;
689 while (clazz != NULL)
691 jint count = JvNumMethods (clazz);
692 jmethodID meth = JvGetFirstMethod (clazz);
694 for (jint i = 0; i < count; ++i)
696 if (((is_static && Modifier::isStatic (meth->accflags))
697 || (! is_static && ! Modifier::isStatic (meth->accflags)))
698 && _Jv_equalUtf8Consts (meth->name, name_u)
699 && _Jv_equalUtf8Consts (meth->signature, sig_u))
700 return meth;
702 meth = meth->getNextMethod();
705 clazz = clazz->getSuperclass ();
708 env->ex = new java::lang::NoSuchMethodError ();
710 catch (jthrowable t)
712 env->ex = t;
715 return NULL;
718 // This is a helper function which turns a va_list into an array of
719 // `jvalue's. It needs signature information in order to do its work.
720 // The array of values must already be allocated.
721 static void
722 array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
724 jclass *arg_elts = elements (arg_types);
725 for (int i = 0; i < arg_types->length; ++i)
727 // Here we assume that sizeof(int) >= sizeof(jint), because we
728 // use `int' when decoding the varargs. Likewise for
729 // float, and double. Also we assume that sizeof(jlong) >=
730 // sizeof(int), i.e. that jlong values are not further
731 // promoted.
732 JvAssert (sizeof (int) >= sizeof (jint));
733 JvAssert (sizeof (jlong) >= sizeof (int));
734 JvAssert (sizeof (double) >= sizeof (jfloat));
735 JvAssert (sizeof (double) >= sizeof (jdouble));
736 if (arg_elts[i] == JvPrimClass (byte))
737 values[i].b = (jbyte) va_arg (vargs, int);
738 else if (arg_elts[i] == JvPrimClass (short))
739 values[i].s = (jshort) va_arg (vargs, int);
740 else if (arg_elts[i] == JvPrimClass (int))
741 values[i].i = (jint) va_arg (vargs, int);
742 else if (arg_elts[i] == JvPrimClass (long))
743 values[i].j = (jlong) va_arg (vargs, jlong);
744 else if (arg_elts[i] == JvPrimClass (float))
745 values[i].f = (jfloat) va_arg (vargs, double);
746 else if (arg_elts[i] == JvPrimClass (double))
747 values[i].d = (jdouble) va_arg (vargs, double);
748 else if (arg_elts[i] == JvPrimClass (boolean))
749 values[i].z = (jboolean) va_arg (vargs, int);
750 else if (arg_elts[i] == JvPrimClass (char))
751 values[i].c = (jchar) va_arg (vargs, int);
752 else
754 // An object.
755 values[i].l = unwrap (va_arg (vargs, jobject));
760 // This can call any sort of method: virtual, "nonvirtual", static, or
761 // constructor.
762 template<typename T, invocation_type style>
763 static T
764 (JNICALL _Jv_JNI_CallAnyMethodV) (JNIEnv *env, jobject obj, jclass klass,
765 jmethodID id, va_list vargs)
767 obj = unwrap (obj);
768 klass = unwrap (klass);
770 jclass decl_class = klass ? klass : obj->getClass ();
771 JvAssert (decl_class != NULL);
773 jclass return_type;
774 JArray<jclass> *arg_types;
778 _Jv_GetTypesFromSignature (id, decl_class,
779 &arg_types, &return_type);
781 jvalue args[arg_types->length];
782 array_from_valist (args, arg_types, vargs);
784 // For constructors we need to pass the Class we are instantiating.
785 if (style == constructor)
786 return_type = klass;
788 jvalue result;
789 _Jv_CallAnyMethodA (obj, return_type, id,
790 style == constructor,
791 style == normal,
792 arg_types, args, &result);
794 return wrap_value (env, extract_from_jvalue<T>(result));
796 catch (jthrowable t)
798 env->ex = t;
801 return wrap_value (env, (T) 0);
804 template<typename T, invocation_type style>
805 static T
806 (JNICALL _Jv_JNI_CallAnyMethod) (JNIEnv *env, jobject obj, jclass klass,
807 jmethodID method, ...)
809 va_list args;
810 T result;
812 va_start (args, method);
813 result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
814 va_end (args);
816 return result;
819 template<typename T, invocation_type style>
820 static T
821 (JNICALL _Jv_JNI_CallAnyMethodA) (JNIEnv *env, jobject obj, jclass klass,
822 jmethodID id, jvalue *args)
824 obj = unwrap (obj);
825 klass = unwrap (klass);
827 jclass decl_class = klass ? klass : obj->getClass ();
828 JvAssert (decl_class != NULL);
830 jclass return_type;
831 JArray<jclass> *arg_types;
834 _Jv_GetTypesFromSignature (id, decl_class,
835 &arg_types, &return_type);
837 // For constructors we need to pass the Class we are instantiating.
838 if (style == constructor)
839 return_type = klass;
841 // Unwrap arguments as required. Eww.
842 jclass *type_elts = elements (arg_types);
843 jvalue arg_copy[arg_types->length];
844 for (int i = 0; i < arg_types->length; ++i)
846 if (type_elts[i]->isPrimitive ())
847 arg_copy[i] = args[i];
848 else
849 arg_copy[i].l = unwrap (args[i].l);
852 jvalue result;
853 _Jv_CallAnyMethodA (obj, return_type, id,
854 style == constructor,
855 style == normal,
856 arg_types, arg_copy, &result);
858 return wrap_value (env, extract_from_jvalue<T>(result));
860 catch (jthrowable t)
862 env->ex = t;
865 return wrap_value (env, (T) 0);
868 template<invocation_type style>
869 static void
870 (JNICALL _Jv_JNI_CallAnyVoidMethodV) (JNIEnv *env, jobject obj, jclass klass,
871 jmethodID id, va_list vargs)
873 obj = unwrap (obj);
874 klass = unwrap (klass);
876 jclass decl_class = klass ? klass : obj->getClass ();
877 JvAssert (decl_class != NULL);
879 jclass return_type;
880 JArray<jclass> *arg_types;
883 _Jv_GetTypesFromSignature (id, decl_class,
884 &arg_types, &return_type);
886 jvalue args[arg_types->length];
887 array_from_valist (args, arg_types, vargs);
889 // For constructors we need to pass the Class we are instantiating.
890 if (style == constructor)
891 return_type = klass;
893 _Jv_CallAnyMethodA (obj, return_type, id,
894 style == constructor,
895 style == normal,
896 arg_types, args, NULL);
898 catch (jthrowable t)
900 env->ex = t;
904 template<invocation_type style>
905 static void
906 (JNICALL _Jv_JNI_CallAnyVoidMethod) (JNIEnv *env, jobject obj, jclass klass,
907 jmethodID method, ...)
909 va_list args;
911 va_start (args, method);
912 _Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
913 va_end (args);
916 template<invocation_type style>
917 static void
918 (JNICALL _Jv_JNI_CallAnyVoidMethodA) (JNIEnv *env, jobject obj, jclass klass,
919 jmethodID id, jvalue *args)
921 jclass decl_class = klass ? klass : obj->getClass ();
922 JvAssert (decl_class != NULL);
924 jclass return_type;
925 JArray<jclass> *arg_types;
928 _Jv_GetTypesFromSignature (id, decl_class,
929 &arg_types, &return_type);
931 // Unwrap arguments as required. Eww.
932 jclass *type_elts = elements (arg_types);
933 jvalue arg_copy[arg_types->length];
934 for (int i = 0; i < arg_types->length; ++i)
936 if (type_elts[i]->isPrimitive ())
937 arg_copy[i] = args[i];
938 else
939 arg_copy[i].l = unwrap (args[i].l);
942 _Jv_CallAnyMethodA (obj, return_type, id,
943 style == constructor,
944 style == normal,
945 arg_types, args, NULL);
947 catch (jthrowable t)
949 env->ex = t;
953 // Functions with this signature are used to implement functions in
954 // the CallMethod family.
955 template<typename T>
956 static T
957 (JNICALL _Jv_JNI_CallMethodV) (JNIEnv *env, jobject obj,
958 jmethodID id, va_list args)
960 return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
963 // Functions with this signature are used to implement functions in
964 // the CallMethod family.
965 template<typename T>
966 static T
967 (JNICALL _Jv_JNI_CallMethod) (JNIEnv *env, jobject obj, jmethodID id, ...)
969 va_list args;
970 T result;
972 va_start (args, id);
973 result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
974 va_end (args);
976 return result;
979 // Functions with this signature are used to implement functions in
980 // the CallMethod family.
981 template<typename T>
982 static T
983 (JNICALL _Jv_JNI_CallMethodA) (JNIEnv *env, jobject obj,
984 jmethodID id, jvalue *args)
986 return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
989 static void
990 (JNICALL _Jv_JNI_CallVoidMethodV) (JNIEnv *env, jobject obj,
991 jmethodID id, va_list args)
993 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
996 static void
997 (JNICALL _Jv_JNI_CallVoidMethod) (JNIEnv *env, jobject obj, jmethodID id, ...)
999 va_list args;
1001 va_start (args, id);
1002 _Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
1003 va_end (args);
1006 static void
1007 (JNICALL _Jv_JNI_CallVoidMethodA) (JNIEnv *env, jobject obj,
1008 jmethodID id, jvalue *args)
1010 _Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
1013 // Functions with this signature are used to implement functions in
1014 // the CallStaticMethod family.
1015 template<typename T>
1016 static T
1017 (JNICALL _Jv_JNI_CallStaticMethodV) (JNIEnv *env, jclass klass,
1018 jmethodID id, va_list args)
1020 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1021 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1023 return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
1026 // Functions with this signature are used to implement functions in
1027 // the CallStaticMethod family.
1028 template<typename T>
1029 static T
1030 (JNICALL _Jv_JNI_CallStaticMethod) (JNIEnv *env, jclass klass,
1031 jmethodID id, ...)
1033 va_list args;
1034 T result;
1036 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1037 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1039 va_start (args, id);
1040 result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
1041 id, args);
1042 va_end (args);
1044 return result;
1047 // Functions with this signature are used to implement functions in
1048 // the CallStaticMethod family.
1049 template<typename T>
1050 static T
1051 (JNICALL _Jv_JNI_CallStaticMethodA) (JNIEnv *env, jclass klass, jmethodID id,
1052 jvalue *args)
1054 JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
1055 JvAssert (java::lang::Class::class$.isInstance (unwrap (klass)));
1057 return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
1060 static void
1061 (JNICALL _Jv_JNI_CallStaticVoidMethodV) (JNIEnv *env, jclass klass,
1062 jmethodID id, va_list args)
1064 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1067 static void
1068 (JNICALL _Jv_JNI_CallStaticVoidMethod) (JNIEnv *env, jclass klass,
1069 jmethodID id, ...)
1071 va_list args;
1073 va_start (args, id);
1074 _Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
1075 va_end (args);
1078 static void
1079 (JNICALL _Jv_JNI_CallStaticVoidMethodA) (JNIEnv *env, jclass klass,
1080 jmethodID id, jvalue *args)
1082 _Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
1085 static jobject
1086 (JNICALL _Jv_JNI_NewObjectV) (JNIEnv *env, jclass klass,
1087 jmethodID id, va_list args)
1089 JvAssert (klass && ! klass->isArray ());
1090 JvAssert (! strcmp (id->name->data, "<init>")
1091 && id->signature->length > 2
1092 && id->signature->data[0] == '('
1093 && ! strcmp (&id->signature->data[id->signature->length - 2],
1094 ")V"));
1096 return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1097 id, args);
1100 static jobject
1101 (JNICALL _Jv_JNI_NewObject) (JNIEnv *env, jclass klass, jmethodID id, ...)
1103 JvAssert (klass && ! klass->isArray ());
1104 JvAssert (! strcmp (id->name->data, "<init>")
1105 && id->signature->length > 2
1106 && id->signature->data[0] == '('
1107 && ! strcmp (&id->signature->data[id->signature->length - 2],
1108 ")V"));
1110 va_list args;
1111 jobject result;
1113 va_start (args, id);
1114 result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
1115 id, args);
1116 va_end (args);
1118 return result;
1121 static jobject
1122 (JNICALL _Jv_JNI_NewObjectA) (JNIEnv *env, jclass klass, jmethodID id,
1123 jvalue *args)
1125 JvAssert (klass && ! klass->isArray ());
1126 JvAssert (! strcmp (id->name->data, "<init>")
1127 && id->signature->length > 2
1128 && id->signature->data[0] == '('
1129 && ! strcmp (&id->signature->data[id->signature->length - 2],
1130 ")V"));
1132 return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
1133 id, args);
1138 template<typename T>
1139 static T
1140 (JNICALL _Jv_JNI_GetField) (JNIEnv *env, jobject obj, jfieldID field)
1142 obj = unwrap (obj);
1143 JvAssert (obj);
1144 T *ptr = (T *) ((char *) obj + field->getOffset ());
1145 return wrap_value (env, *ptr);
1148 template<typename T>
1149 static void
1150 (JNICALL _Jv_JNI_SetField) (JNIEnv *, jobject obj, jfieldID field, T value)
1152 obj = unwrap (obj);
1153 value = unwrap (value);
1155 JvAssert (obj);
1156 T *ptr = (T *) ((char *) obj + field->getOffset ());
1157 *ptr = value;
1160 template<jboolean is_static>
1161 static jfieldID
1162 (JNICALL _Jv_JNI_GetAnyFieldID) (JNIEnv *env, jclass clazz,
1163 const char *name, const char *sig)
1167 clazz = unwrap (clazz);
1169 _Jv_InitClass (clazz);
1171 _Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
1173 // FIXME: assume that SIG isn't too long.
1174 int len = strlen (sig);
1175 char s[len + 1];
1176 for (int i = 0; i <= len; ++i)
1177 s[i] = (sig[i] == '/') ? '.' : sig[i];
1178 jclass field_class = _Jv_FindClassFromSignature ((char *) s, NULL);
1180 // FIXME: what if field_class == NULL?
1182 java::lang::ClassLoader *loader = clazz->getClassLoaderInternal ();
1183 while (clazz != NULL)
1185 // We acquire the class lock so that fields aren't resolved
1186 // while we are running.
1187 JvSynchronize sync (clazz);
1189 jint count = (is_static
1190 ? JvNumStaticFields (clazz)
1191 : JvNumInstanceFields (clazz));
1192 jfieldID field = (is_static
1193 ? JvGetFirstStaticField (clazz)
1194 : JvGetFirstInstanceField (clazz));
1195 for (jint i = 0; i < count; ++i)
1197 _Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
1199 // The field might be resolved or it might not be. It
1200 // is much simpler to always resolve it.
1201 _Jv_ResolveField (field, loader);
1202 if (_Jv_equalUtf8Consts (f_name, a_name)
1203 && field->getClass() == field_class)
1204 return field;
1206 field = field->getNextField ();
1209 clazz = clazz->getSuperclass ();
1212 env->ex = new java::lang::NoSuchFieldError ();
1214 catch (jthrowable t)
1216 env->ex = t;
1218 return NULL;
1221 template<typename T>
1222 static T
1223 (JNICALL _Jv_JNI_GetStaticField) (JNIEnv *env, jclass, jfieldID field)
1225 T *ptr = (T *) field->u.addr;
1226 return wrap_value (env, *ptr);
1229 template<typename T>
1230 static void
1231 (JNICALL _Jv_JNI_SetStaticField) (JNIEnv *, jclass, jfieldID field, T value)
1233 value = unwrap (value);
1234 T *ptr = (T *) field->u.addr;
1235 *ptr = value;
1238 static jstring
1239 (JNICALL _Jv_JNI_NewString) (JNIEnv *env, const jchar *unichars, jsize len)
1243 jstring r = _Jv_NewString (unichars, len);
1244 return (jstring) wrap_value (env, r);
1246 catch (jthrowable t)
1248 env->ex = t;
1249 return NULL;
1253 static jsize
1254 (JNICALL _Jv_JNI_GetStringLength) (JNIEnv *, jstring string)
1256 return unwrap (string)->length();
1259 static const jchar *
1260 (JNICALL _Jv_JNI_GetStringChars) (JNIEnv *, jstring string, jboolean *isCopy)
1262 string = unwrap (string);
1263 jchar *result = _Jv_GetStringChars (string);
1264 mark_for_gc (string, global_ref_table);
1265 if (isCopy)
1266 *isCopy = false;
1267 return (const jchar *) result;
1270 static void
1271 (JNICALL _Jv_JNI_ReleaseStringChars) (JNIEnv *, jstring string, const jchar *)
1273 unmark_for_gc (unwrap (string), global_ref_table);
1276 static jstring
1277 (JNICALL _Jv_JNI_NewStringUTF) (JNIEnv *env, const char *bytes)
1281 jstring result = JvNewStringUTF (bytes);
1282 return (jstring) wrap_value (env, result);
1284 catch (jthrowable t)
1286 env->ex = t;
1287 return NULL;
1291 static jsize
1292 (JNICALL _Jv_JNI_GetStringUTFLength) (JNIEnv *, jstring string)
1294 return JvGetStringUTFLength (unwrap (string));
1297 static const char *
1298 (JNICALL _Jv_JNI_GetStringUTFChars) (JNIEnv *env, jstring string,
1299 jboolean *isCopy)
1301 string = unwrap (string);
1302 jsize len = JvGetStringUTFLength (string);
1305 char *r = (char *) _Jv_Malloc (len + 1);
1306 JvGetStringUTFRegion (string, 0, len, r);
1307 r[len] = '\0';
1309 if (isCopy)
1310 *isCopy = true;
1312 return (const char *) r;
1314 catch (jthrowable t)
1316 env->ex = t;
1317 return NULL;
1321 static void
1322 (JNICALL _Jv_JNI_ReleaseStringUTFChars) (JNIEnv *, jstring, const char *utf)
1324 _Jv_Free ((void *) utf);
1327 static void
1328 (JNICALL _Jv_JNI_GetStringRegion) (JNIEnv *env, jstring string, jsize start,
1329 jsize len, jchar *buf)
1331 string = unwrap (string);
1332 jchar *result = _Jv_GetStringChars (string);
1333 if (start < 0 || start > string->length ()
1334 || len < 0 || start + len > string->length ())
1338 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1340 catch (jthrowable t)
1342 env->ex = t;
1345 else
1346 memcpy (buf, &result[start], len * sizeof (jchar));
1349 static void
1350 (JNICALL _Jv_JNI_GetStringUTFRegion) (JNIEnv *env, jstring str, jsize start,
1351 jsize len, char *buf)
1353 str = unwrap (str);
1355 if (start < 0 || start > str->length ()
1356 || len < 0 || start + len > str->length ())
1360 env->ex = new java::lang::StringIndexOutOfBoundsException ();
1362 catch (jthrowable t)
1364 env->ex = t;
1367 else
1368 _Jv_GetStringUTFRegion (str, start, len, buf);
1371 static const jchar *
1372 (JNICALL _Jv_JNI_GetStringCritical) (JNIEnv *, jstring str, jboolean *isCopy)
1374 jchar *result = _Jv_GetStringChars (unwrap (str));
1375 if (isCopy)
1376 *isCopy = false;
1377 return result;
1380 static void
1381 (JNICALL _Jv_JNI_ReleaseStringCritical) (JNIEnv *, jstring, const jchar *)
1383 // Nothing.
1386 static jsize
1387 (JNICALL _Jv_JNI_GetArrayLength) (JNIEnv *, jarray array)
1389 return unwrap (array)->length;
1392 static jarray
1393 (JNICALL _Jv_JNI_NewObjectArray) (JNIEnv *env, jsize length,
1394 jclass elementClass, jobject init)
1398 elementClass = unwrap (elementClass);
1399 init = unwrap (init);
1401 _Jv_CheckCast (elementClass, init);
1402 jarray result = JvNewObjectArray (length, elementClass, init);
1403 return (jarray) wrap_value (env, result);
1405 catch (jthrowable t)
1407 env->ex = t;
1408 return NULL;
1412 static jobject
1413 (JNICALL _Jv_JNI_GetObjectArrayElement) (JNIEnv *env, jobjectArray array,
1414 jsize index)
1416 if ((unsigned) index >= (unsigned) array->length)
1417 _Jv_ThrowBadArrayIndex (index);
1418 jobject *elts = elements (unwrap (array));
1419 return wrap_value (env, elts[index]);
1422 static void
1423 (JNICALL _Jv_JNI_SetObjectArrayElement) (JNIEnv *env, jobjectArray array,
1424 jsize index, jobject value)
1428 array = unwrap (array);
1429 value = unwrap (value);
1431 _Jv_CheckArrayStore (array, value);
1432 if ((unsigned) index >= (unsigned) array->length)
1433 _Jv_ThrowBadArrayIndex (index);
1434 jobject *elts = elements (array);
1435 elts[index] = value;
1437 catch (jthrowable t)
1439 env->ex = t;
1443 template<typename T, jclass K>
1444 static JArray<T> *
1445 (JNICALL _Jv_JNI_NewPrimitiveArray) (JNIEnv *env, jsize length)
1449 return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
1451 catch (jthrowable t)
1453 env->ex = t;
1454 return NULL;
1458 template<typename T, jclass K>
1459 static T *
1460 (JNICALL _Jv_JNI_GetPrimitiveArrayElements) (JNIEnv *env, JArray<T> *array,
1461 jboolean *isCopy)
1463 array = unwrap (array);
1464 if (! _Jv_JNI_check_types (env, array, K))
1465 return NULL;
1466 T *elts = elements (array);
1467 if (isCopy)
1469 // We elect never to copy.
1470 *isCopy = false;
1472 mark_for_gc (array, global_ref_table);
1473 return elts;
1476 template<typename T, jclass K>
1477 static void
1478 (JNICALL _Jv_JNI_ReleasePrimitiveArrayElements) (JNIEnv *env, JArray<T> *array,
1479 T *, jint /* mode */)
1481 array = unwrap (array);
1482 _Jv_JNI_check_types (env, array, K);
1483 // Note that we ignore MODE. We can do this because we never copy
1484 // the array elements. My reading of the JNI documentation is that
1485 // this is an option for the implementor.
1486 unmark_for_gc (array, global_ref_table);
1489 template<typename T, jclass K>
1490 static void
1491 (JNICALL _Jv_JNI_GetPrimitiveArrayRegion) (JNIEnv *env, JArray<T> *array,
1492 jsize start, jsize len,
1493 T *buf)
1495 array = unwrap (array);
1496 if (! _Jv_JNI_check_types (env, array, K))
1497 return;
1499 // The cast to unsigned lets us save a comparison.
1500 if (start < 0 || len < 0
1501 || (unsigned long) (start + len) > (unsigned long) array->length)
1505 // FIXME: index.
1506 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1508 catch (jthrowable t)
1510 // Could have thown out of memory error.
1511 env->ex = t;
1514 else
1516 T *elts = elements (array) + start;
1517 memcpy (buf, elts, len * sizeof (T));
1521 template<typename T, jclass K>
1522 static void
1523 (JNICALL _Jv_JNI_SetPrimitiveArrayRegion) (JNIEnv *env, JArray<T> *array,
1524 jsize start, jsize len, T *buf)
1526 array = unwrap (array);
1527 if (! _Jv_JNI_check_types (env, array, K))
1528 return;
1530 // The cast to unsigned lets us save a comparison.
1531 if (start < 0 || len < 0
1532 || (unsigned long) (start + len) > (unsigned long) array->length)
1536 // FIXME: index.
1537 env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
1539 catch (jthrowable t)
1541 env->ex = t;
1544 else
1546 T *elts = elements (array) + start;
1547 memcpy (elts, buf, len * sizeof (T));
1551 static void *
1552 (JNICALL _Jv_JNI_GetPrimitiveArrayCritical) (JNIEnv *, jarray array,
1553 jboolean *isCopy)
1555 array = unwrap (array);
1556 // FIXME: does this work?
1557 jclass klass = array->getClass()->getComponentType();
1558 JvAssert (klass->isPrimitive ());
1559 char *r = _Jv_GetArrayElementFromElementType (array, klass);
1560 if (isCopy)
1561 *isCopy = false;
1562 return r;
1565 static void
1566 (JNICALL _Jv_JNI_ReleasePrimitiveArrayCritical) (JNIEnv *, jarray, void *, jint)
1568 // Nothing.
1571 static jint
1572 (JNICALL _Jv_JNI_MonitorEnter) (JNIEnv *env, jobject obj)
1576 _Jv_MonitorEnter (unwrap (obj));
1577 return 0;
1579 catch (jthrowable t)
1581 env->ex = t;
1583 return JNI_ERR;
1586 static jint
1587 (JNICALL _Jv_JNI_MonitorExit) (JNIEnv *env, jobject obj)
1591 _Jv_MonitorExit (unwrap (obj));
1592 return 0;
1594 catch (jthrowable t)
1596 env->ex = t;
1598 return JNI_ERR;
1601 // JDK 1.2
1602 jobject
1603 (JNICALL _Jv_JNI_ToReflectedField) (JNIEnv *env, jclass cls, jfieldID fieldID,
1604 jboolean)
1608 cls = unwrap (cls);
1609 java::lang::reflect::Field *field = new java::lang::reflect::Field();
1610 field->declaringClass = cls;
1611 field->offset = (char*) fieldID - (char *) cls->fields;
1612 field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
1613 return wrap_value (env, field);
1615 catch (jthrowable t)
1617 env->ex = t;
1619 return NULL;
1622 // JDK 1.2
1623 static jfieldID
1624 (JNICALL _Jv_JNI_FromReflectedField) (JNIEnv *, jobject f)
1626 using namespace java::lang::reflect;
1628 f = unwrap (f);
1629 Field *field = reinterpret_cast<Field *> (f);
1630 return _Jv_FromReflectedField (field);
1633 jobject
1634 (JNICALL _Jv_JNI_ToReflectedMethod) (JNIEnv *env, jclass klass, jmethodID id,
1635 jboolean)
1637 using namespace java::lang::reflect;
1639 jobject result = NULL;
1640 klass = unwrap (klass);
1644 if (_Jv_equalUtf8Consts (id->name, init_name))
1646 // A constructor.
1647 Constructor *cons = new Constructor ();
1648 cons->offset = (char *) id - (char *) &klass->methods;
1649 cons->declaringClass = klass;
1650 result = cons;
1652 else
1654 Method *meth = new Method ();
1655 meth->offset = (char *) id - (char *) &klass->methods;
1656 meth->declaringClass = klass;
1657 result = meth;
1660 catch (jthrowable t)
1662 env->ex = t;
1665 return wrap_value (env, result);
1668 static jmethodID
1669 (JNICALL _Jv_JNI_FromReflectedMethod) (JNIEnv *, jobject method)
1671 using namespace java::lang::reflect;
1672 method = unwrap (method);
1673 if (Method::class$.isInstance (method))
1674 return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
1675 return
1676 _Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
1679 // JDK 1.2.
1680 jweak
1681 (JNICALL _Jv_JNI_NewWeakGlobalRef) (JNIEnv *env, jobject obj)
1683 using namespace gnu::gcj::runtime;
1684 JNIWeakRef *ref = NULL;
1688 // This seems weird but I think it is correct.
1689 obj = unwrap (obj);
1690 ref = new JNIWeakRef (obj);
1691 mark_for_gc (ref, global_ref_table);
1693 catch (jthrowable t)
1695 env->ex = t;
1698 return reinterpret_cast<jweak> (ref);
1701 void
1702 (JNICALL _Jv_JNI_DeleteWeakGlobalRef) (JNIEnv *, jweak obj)
1704 using namespace gnu::gcj::runtime;
1705 JNIWeakRef *ref = reinterpret_cast<JNIWeakRef *> (obj);
1706 unmark_for_gc (ref, global_ref_table);
1707 ref->clear ();
1712 // Direct byte buffers.
1714 static jobject
1715 (JNICALL _Jv_JNI_NewDirectByteBuffer) (JNIEnv *, void *address, jlong length)
1717 using namespace gnu::gcj;
1718 using namespace java::nio;
1719 return new DirectByteBufferImpl (reinterpret_cast<RawData *> (address),
1720 length);
1723 static void *
1724 (JNICALL _Jv_JNI_GetDirectBufferAddress) (JNIEnv *, jobject buffer)
1726 using namespace java::nio;
1727 DirectByteBufferImpl* bb = static_cast<DirectByteBufferImpl *> (buffer);
1728 return reinterpret_cast<void *> (bb->address);
1731 static jlong
1732 (JNICALL _Jv_JNI_GetDirectBufferCapacity) (JNIEnv *, jobject buffer)
1734 using namespace java::nio;
1735 DirectByteBufferImpl* bb = static_cast<DirectByteBufferImpl *> (buffer);
1736 return bb->capacity();
1741 // Hash table of native methods.
1742 static JNINativeMethod *nathash;
1743 // Number of slots used.
1744 static int nathash_count = 0;
1745 // Number of slots available. Must be power of 2.
1746 static int nathash_size = 0;
1748 #define DELETED_ENTRY ((char *) (~0))
1750 // Compute a hash value for a native method descriptor.
1751 static int
1752 hash (const JNINativeMethod *method)
1754 char *ptr;
1755 int hash = 0;
1757 ptr = method->name;
1758 while (*ptr)
1759 hash = (31 * hash) + *ptr++;
1761 ptr = method->signature;
1762 while (*ptr)
1763 hash = (31 * hash) + *ptr++;
1765 return hash;
1768 // Find the slot where a native method goes.
1769 static JNINativeMethod *
1770 nathash_find_slot (const JNINativeMethod *method)
1772 jint h = hash (method);
1773 int step = (h ^ (h >> 16)) | 1;
1774 int w = h & (nathash_size - 1);
1775 int del = -1;
1777 for (;;)
1779 JNINativeMethod *slotp = &nathash[w];
1780 if (slotp->name == NULL)
1782 if (del >= 0)
1783 return &nathash[del];
1784 else
1785 return slotp;
1787 else if (slotp->name == DELETED_ENTRY)
1788 del = w;
1789 else if (! strcmp (slotp->name, method->name)
1790 && ! strcmp (slotp->signature, method->signature))
1791 return slotp;
1792 w = (w + step) & (nathash_size - 1);
1796 // Find a method. Return NULL if it isn't in the hash table.
1797 static void *
1798 nathash_find (JNINativeMethod *method)
1800 if (nathash == NULL)
1801 return NULL;
1802 JNINativeMethod *slot = nathash_find_slot (method);
1803 if (slot->name == NULL || slot->name == DELETED_ENTRY)
1804 return NULL;
1805 return slot->fnPtr;
1808 static void
1809 natrehash ()
1811 if (nathash == NULL)
1813 nathash_size = 1024;
1814 nathash =
1815 (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1816 * sizeof (JNINativeMethod));
1817 memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1819 else
1821 int savesize = nathash_size;
1822 JNINativeMethod *savehash = nathash;
1823 nathash_size *= 2;
1824 nathash =
1825 (JNINativeMethod *) _Jv_AllocBytes (nathash_size
1826 * sizeof (JNINativeMethod));
1827 memset (nathash, 0, nathash_size * sizeof (JNINativeMethod));
1829 for (int i = 0; i < savesize; ++i)
1831 if (savehash[i].name != NULL && savehash[i].name != DELETED_ENTRY)
1833 JNINativeMethod *slot = nathash_find_slot (&savehash[i]);
1834 *slot = savehash[i];
1840 static void
1841 nathash_add (const JNINativeMethod *method)
1843 if (3 * nathash_count >= 2 * nathash_size)
1844 natrehash ();
1845 JNINativeMethod *slot = nathash_find_slot (method);
1846 // If the slot has a real entry in it, then there is no work to do.
1847 if (slot->name != NULL && slot->name != DELETED_ENTRY)
1848 return;
1849 // FIXME
1850 slot->name = strdup (method->name);
1851 slot->signature = strdup (method->signature);
1852 slot->fnPtr = method->fnPtr;
1855 static jint
1856 (JNICALL _Jv_JNI_RegisterNatives) (JNIEnv *env, jclass klass,
1857 const JNINativeMethod *methods,
1858 jint nMethods)
1860 // Synchronize while we do the work. This must match
1861 // synchronization in some other functions that manipulate or use
1862 // the nathash table.
1863 JvSynchronize sync (global_ref_table);
1865 // Look at each descriptor given us, and find the corresponding
1866 // method in the class.
1867 for (int j = 0; j < nMethods; ++j)
1869 bool found = false;
1871 _Jv_Method *imeths = JvGetFirstMethod (klass);
1872 for (int i = 0; i < JvNumMethods (klass); ++i)
1874 _Jv_Method *self = &imeths[i];
1876 if (! strcmp (self->name->data, methods[j].name)
1877 && ! strcmp (self->signature->data, methods[j].signature))
1879 if (! (self->accflags
1880 & java::lang::reflect::Modifier::NATIVE))
1881 break;
1883 // Found a match that is native.
1884 found = true;
1885 nathash_add (&methods[j]);
1887 break;
1891 if (! found)
1893 jstring m = JvNewStringUTF (methods[j].name);
1896 env->ex =new java::lang::NoSuchMethodError (m);
1898 catch (jthrowable t)
1900 env->ex = t;
1902 return JNI_ERR;
1906 return JNI_OK;
1909 static jint
1910 (JNICALL _Jv_JNI_UnregisterNatives) (JNIEnv *, jclass)
1912 // FIXME -- we could implement this.
1913 return JNI_ERR;
1918 // Add a character to the buffer, encoding properly.
1919 static void
1920 add_char (char *buf, jchar c, int *here)
1922 if (c == '_')
1924 buf[(*here)++] = '_';
1925 buf[(*here)++] = '1';
1927 else if (c == ';')
1929 buf[(*here)++] = '_';
1930 buf[(*here)++] = '2';
1932 else if (c == '[')
1934 buf[(*here)++] = '_';
1935 buf[(*here)++] = '3';
1938 // Also check for `.' here because we might be passed an internal
1939 // qualified class name like `foo.bar'.
1940 else if (c == '/' || c == '.')
1941 buf[(*here)++] = '_';
1942 else if ((c >= '0' && c <= '9')
1943 || (c >= 'a' && c <= 'z')
1944 || (c >= 'A' && c <= 'Z'))
1945 buf[(*here)++] = (char) c;
1946 else
1948 // "Unicode" character.
1949 buf[(*here)++] = '_';
1950 buf[(*here)++] = '0';
1951 for (int i = 0; i < 4; ++i)
1953 int val = c & 0x0f;
1954 buf[(*here) + 3 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
1955 c >>= 4;
1957 *here += 4;
1961 // Compute a mangled name for a native function. This computes the
1962 // long name, and also returns an index which indicates where a NUL
1963 // can be placed to create the short name. This function assumes that
1964 // the buffer is large enough for its results.
1965 static void
1966 mangled_name (jclass klass, _Jv_Utf8Const *func_name,
1967 _Jv_Utf8Const *signature, char *buf, int *long_start)
1969 strcpy (buf, "Java_");
1970 int here = 5;
1972 // Add fully qualified class name.
1973 jchar *chars = _Jv_GetStringChars (klass->getName ());
1974 jint len = klass->getName ()->length ();
1975 for (int i = 0; i < len; ++i)
1976 add_char (buf, chars[i], &here);
1978 // Don't use add_char because we need a literal `_'.
1979 buf[here++] = '_';
1981 const unsigned char *fn = (const unsigned char *) func_name->data;
1982 const unsigned char *limit = fn + func_name->length;
1983 for (int i = 0; ; ++i)
1985 int ch = UTF8_GET (fn, limit);
1986 if (ch < 0)
1987 break;
1988 add_char (buf, ch, &here);
1991 // This is where the long signature begins.
1992 *long_start = here;
1993 buf[here++] = '_';
1994 buf[here++] = '_';
1996 const unsigned char *sig = (const unsigned char *) signature->data;
1997 limit = sig + signature->length;
1998 JvAssert (sig[0] == '(');
1999 ++sig;
2000 while (1)
2002 int ch = UTF8_GET (sig, limit);
2003 if (ch == ')' || ch < 0)
2004 break;
2005 add_char (buf, ch, &here);
2008 buf[here] = '\0';
2011 // Return the current thread's JNIEnv; if one does not exist, create
2012 // it. Also create a new system frame for use. This is `extern "C"'
2013 // because the compiler calls it.
2014 extern "C" JNIEnv *
2015 _Jv_GetJNIEnvNewFrame (jclass klass)
2017 JNIEnv *env = _Jv_GetCurrentJNIEnv ();
2018 if (env == NULL)
2020 env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2021 env->p = &_Jv_JNIFunctions;
2022 env->klass = klass;
2023 env->locals = NULL;
2024 // We set env->ex below.
2026 _Jv_SetCurrentJNIEnv (env);
2029 _Jv_JNI_LocalFrame *frame
2030 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2031 + (FRAME_SIZE
2032 * sizeof (jobject)));
2034 frame->marker = MARK_SYSTEM;
2035 frame->size = FRAME_SIZE;
2036 frame->next = env->locals;
2038 for (int i = 0; i < frame->size; ++i)
2039 frame->vec[i] = NULL;
2041 env->locals = frame;
2042 env->ex = NULL;
2044 return env;
2047 // Return the function which implements a particular JNI method. If
2048 // we can't find the function, we throw the appropriate exception.
2049 // This is `extern "C"' because the compiler uses it.
2050 extern "C" void *
2051 _Jv_LookupJNIMethod (jclass klass, _Jv_Utf8Const *name,
2052 _Jv_Utf8Const *signature, int args_size)
2054 char buf[10 + 6 * (name->length + signature->length) + 12];
2055 int long_start;
2056 void *function;
2058 // Synchronize on something convenient. Right now we use the hash.
2059 JvSynchronize sync (global_ref_table);
2061 // First see if we have an override in the hash table.
2062 strncpy (buf, name->data, name->length);
2063 buf[name->length] = '\0';
2064 strncpy (buf + name->length + 1, signature->data, signature->length);
2065 buf[name->length + signature->length + 1] = '\0';
2066 JNINativeMethod meth;
2067 meth.name = buf;
2068 meth.signature = buf + name->length + 1;
2069 function = nathash_find (&meth);
2070 if (function != NULL)
2071 return function;
2073 // If there was no override, then look in the symbol table.
2074 buf[0] = '_';
2075 mangled_name (klass, name, signature, buf + 1, &long_start);
2076 char c = buf[long_start + 1];
2077 buf[long_start + 1] = '\0';
2079 function = _Jv_FindSymbolInExecutable (buf + 1);
2080 #ifdef WIN32
2081 // On Win32, we use the "stdcall" calling convention (see JNICALL
2082 // in jni.h).
2084 // For a function named 'fooBar' that takes 'nn' bytes as arguments,
2085 // by default, MinGW GCC exports it as 'fooBar@nn', MSVC exports it
2086 // as '_fooBar@nn' and Borland C exports it as 'fooBar'. We try to
2087 // take care of all these variations here.
2089 char asz_buf[12]; /* '@' + '2147483647' (32-bit INT_MAX) + '\0' */
2090 char long_nm_sv[11]; /* Ditto, except for the '\0'. */
2092 if (function == NULL)
2094 // We have tried searching for the 'fooBar' form (BCC) - now
2095 // try the others.
2097 // First, save the part of the long name that will be damaged
2098 // by appending '@nn'.
2099 memcpy (long_nm_sv, (buf + long_start + 1 + 1), sizeof (long_nm_sv));
2101 sprintf (asz_buf, "@%d", args_size);
2102 strcat (buf, asz_buf);
2104 // Search for the '_fooBar@nn' form (MSVC).
2105 function = _Jv_FindSymbolInExecutable (buf);
2107 if (function == NULL)
2109 // Search for the 'fooBar@nn' form (MinGW GCC).
2110 function = _Jv_FindSymbolInExecutable (buf + 1);
2113 #endif /* WIN32 */
2115 if (function == NULL)
2117 buf[long_start + 1] = c;
2118 #ifdef WIN32
2119 // Restore the part of the long name that was damaged by
2120 // appending the '@nn'.
2121 memcpy ((buf + long_start + 1 + 1), long_nm_sv, sizeof (long_nm_sv));
2122 #endif /* WIN32 */
2123 function = _Jv_FindSymbolInExecutable (buf + 1);
2124 if (function == NULL)
2126 #ifdef WIN32
2127 strcat (buf, asz_buf);
2128 function = _Jv_FindSymbolInExecutable (buf);
2129 if (function == NULL)
2130 function = _Jv_FindSymbolInExecutable (buf + 1);
2132 if (function == NULL)
2133 #endif /* WIN32 */
2135 jstring str = JvNewStringUTF (name->data);
2136 throw new java::lang::UnsatisfiedLinkError (str);
2141 return function;
2144 #ifdef INTERPRETER
2146 // This function is the stub which is used to turn an ordinary (CNI)
2147 // method call into a JNI call.
2148 void
2149 _Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
2151 _Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
2153 JNIEnv *env = _Jv_GetJNIEnvNewFrame (_this->defining_class);
2155 // FIXME: we should mark every reference parameter as a local. For
2156 // now we assume a conservative GC, and we assume that the
2157 // references are on the stack somewhere.
2159 // We cache the value that we find, of course, but if we don't find
2160 // a value we don't cache that fact -- we might subsequently load a
2161 // library which finds the function in question.
2163 // Synchronize on a convenient object to ensure sanity in case two
2164 // threads reach this point for the same function at the same
2165 // time.
2166 JvSynchronize sync (global_ref_table);
2167 if (_this->function == NULL)
2169 int args_size = sizeof (JNIEnv *) + _this->args_raw_size;
2171 if (_this->self->accflags & java::lang::reflect::Modifier::STATIC)
2172 args_size += sizeof (_this->defining_class);
2174 _this->function = _Jv_LookupJNIMethod (_this->defining_class,
2175 _this->self->name,
2176 _this->self->signature,
2177 args_size);
2181 JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
2182 ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
2183 int offset = 0;
2185 // First argument is always the environment pointer.
2186 real_args[offset++].ptr = env;
2188 // For a static method, we pass in the Class. For non-static
2189 // methods, the `this' argument is already handled.
2190 if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2191 real_args[offset++].ptr = _this->defining_class;
2193 // In libgcj, the callee synchronizes.
2194 jobject sync = NULL;
2195 if ((_this->self->accflags & java::lang::reflect::Modifier::SYNCHRONIZED))
2197 if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
2198 sync = _this->defining_class;
2199 else
2200 sync = (jobject) args[0].ptr;
2201 _Jv_MonitorEnter (sync);
2204 // Copy over passed-in arguments.
2205 memcpy (&real_args[offset], args, _this->args_raw_size);
2207 // The actual call to the JNI function.
2208 ffi_raw_call (&_this->jni_cif, (void (*)()) _this->function,
2209 ret, real_args);
2211 if (sync != NULL)
2212 _Jv_MonitorExit (sync);
2214 _Jv_JNI_PopSystemFrame (env);
2217 #endif /* INTERPRETER */
2222 // Invocation API.
2225 // An internal helper function.
2226 static jint
2227 _Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv,
2228 void *args, jboolean is_daemon)
2230 JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
2231 java::lang::ThreadGroup *group = NULL;
2233 if (attach)
2235 // FIXME: do we really want to support 1.1?
2236 if (attach->version != JNI_VERSION_1_4
2237 && attach->version != JNI_VERSION_1_2
2238 && attach->version != JNI_VERSION_1_1)
2239 return JNI_EVERSION;
2241 JvAssert (java::lang::ThreadGroup::class$.isInstance (attach->group));
2242 group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
2245 // Attaching an already-attached thread is a no-op.
2246 if (_Jv_GetCurrentJNIEnv () != NULL)
2247 return 0;
2249 JNIEnv *env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
2250 if (env == NULL)
2251 return JNI_ERR;
2252 env->p = &_Jv_JNIFunctions;
2253 env->ex = NULL;
2254 env->klass = NULL;
2255 env->locals
2256 = (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
2257 + (FRAME_SIZE
2258 * sizeof (jobject)));
2259 if (env->locals == NULL)
2261 _Jv_Free (env);
2262 return JNI_ERR;
2265 env->locals->marker = MARK_SYSTEM;
2266 env->locals->size = FRAME_SIZE;
2267 env->locals->next = NULL;
2269 for (int i = 0; i < env->locals->size; ++i)
2270 env->locals->vec[i] = NULL;
2272 *penv = reinterpret_cast<void *> (env);
2274 // This thread might already be a Java thread -- this function might
2275 // have been called simply to set the new JNIEnv.
2276 if (_Jv_ThreadCurrent () == NULL)
2280 if (is_daemon)
2281 _Jv_AttachCurrentThreadAsDaemon (name, group);
2282 else
2283 _Jv_AttachCurrentThread (name, group);
2285 catch (jthrowable t)
2287 return JNI_ERR;
2290 _Jv_SetCurrentJNIEnv (env);
2292 return 0;
2295 // This is the one actually used by JNI.
2296 static jint
2297 (JNICALL _Jv_JNI_AttachCurrentThread) (JavaVM *vm, void **penv, void *args)
2299 return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, false);
2302 static jint
2303 (JNICALL _Jv_JNI_AttachCurrentThreadAsDaemon) (JavaVM *vm, void **penv,
2304 void *args)
2306 return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args, true);
2309 static jint
2310 (JNICALL _Jv_JNI_DestroyJavaVM) (JavaVM *vm)
2312 JvAssert (the_vm && vm == the_vm);
2314 JNIEnv *env;
2315 if (_Jv_ThreadCurrent () != NULL)
2317 jstring main_name;
2318 // This sucks.
2321 main_name = JvNewStringLatin1 ("main");
2323 catch (jthrowable t)
2325 return JNI_ERR;
2328 jint r = _Jv_JNI_AttachCurrentThread (vm, main_name,
2329 reinterpret_cast<void **> (&env),
2330 NULL, false);
2331 if (r < 0)
2332 return r;
2334 else
2335 env = _Jv_GetCurrentJNIEnv ();
2337 _Jv_ThreadWait ();
2339 // Docs say that this always returns an error code.
2340 return JNI_ERR;
2343 jint
2344 (JNICALL _Jv_JNI_DetachCurrentThread) (JavaVM *)
2346 jint code = _Jv_DetachCurrentThread ();
2347 return code ? JNI_EDETACHED : 0;
2350 static jint
2351 (JNICALL _Jv_JNI_GetEnv) (JavaVM *, void **penv, jint version)
2353 if (_Jv_ThreadCurrent () == NULL)
2355 *penv = NULL;
2356 return JNI_EDETACHED;
2359 #ifdef ENABLE_JVMPI
2360 // Handle JVMPI requests.
2361 if (version == JVMPI_VERSION_1)
2363 *penv = (void *) &_Jv_JVMPI_Interface;
2364 return 0;
2366 #endif
2368 // FIXME: do we really want to support 1.1?
2369 if (version != JNI_VERSION_1_4 && version != JNI_VERSION_1_2
2370 && version != JNI_VERSION_1_1)
2372 *penv = NULL;
2373 return JNI_EVERSION;
2376 *penv = (void *) _Jv_GetCurrentJNIEnv ();
2377 return 0;
2380 JNIEXPORT jint JNICALL
2381 JNI_GetDefaultJavaVMInitArgs (void *args)
2383 jint version = * (jint *) args;
2384 // Here we only support 1.2 and 1.4.
2385 if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2386 return JNI_EVERSION;
2388 JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2389 ia->version = JNI_VERSION_1_4;
2390 ia->nOptions = 0;
2391 ia->options = NULL;
2392 ia->ignoreUnrecognized = true;
2394 return 0;
2397 JNIEXPORT jint JNICALL
2398 JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
2400 JvAssert (! the_vm);
2402 _Jv_CreateJavaVM (NULL);
2404 // FIXME: synchronize
2405 JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2406 if (nvm == NULL)
2407 return JNI_ERR;
2408 nvm->functions = &_Jv_JNI_InvokeFunctions;
2410 // Parse the arguments.
2411 if (args != NULL)
2413 jint version = * (jint *) args;
2414 // We only support 1.2 and 1.4.
2415 if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
2416 return JNI_EVERSION;
2417 JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
2418 for (int i = 0; i < ia->nOptions; ++i)
2420 if (! strcmp (ia->options[i].optionString, "vfprintf")
2421 || ! strcmp (ia->options[i].optionString, "exit")
2422 || ! strcmp (ia->options[i].optionString, "abort"))
2424 // We are required to recognize these, but for now we
2425 // don't handle them in any way. FIXME.
2426 continue;
2428 else if (! strncmp (ia->options[i].optionString,
2429 "-verbose", sizeof ("-verbose") - 1))
2431 // We don't do anything with this option either. We
2432 // might want to make sure the argument is valid, but we
2433 // don't really care all that much for now.
2434 continue;
2436 else if (! strncmp (ia->options[i].optionString, "-D", 2))
2438 // FIXME.
2439 continue;
2441 else if (ia->ignoreUnrecognized)
2443 if (ia->options[i].optionString[0] == '_'
2444 || ! strncmp (ia->options[i].optionString, "-X", 2))
2445 continue;
2448 return JNI_ERR;
2452 jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
2453 if (r < 0)
2454 return r;
2456 the_vm = nvm;
2457 *vm = the_vm;
2459 return 0;
2462 JNIEXPORT jint JNICALL
2463 JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
2465 if (buf_len <= 0)
2466 return JNI_ERR;
2468 // We only support a single VM.
2469 if (the_vm != NULL)
2471 vm_buffer[0] = the_vm;
2472 *n_vms = 1;
2474 else
2475 *n_vms = 0;
2476 return 0;
2479 JavaVM *
2480 _Jv_GetJavaVM ()
2482 // FIXME: synchronize
2483 if (! the_vm)
2485 JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
2486 if (nvm != NULL)
2487 nvm->functions = &_Jv_JNI_InvokeFunctions;
2488 the_vm = nvm;
2491 // If this is a Java thread, we want to make sure it has an
2492 // associated JNIEnv.
2493 if (_Jv_ThreadCurrent () != NULL)
2495 void *ignore;
2496 _Jv_JNI_AttachCurrentThread (the_vm, &ignore, NULL);
2499 return the_vm;
2502 static jint
2503 (JNICALL _Jv_JNI_GetJavaVM) (JNIEnv *, JavaVM **vm)
2505 *vm = _Jv_GetJavaVM ();
2506 return *vm == NULL ? JNI_ERR : JNI_OK;
2511 #define RESERVED NULL
2513 struct JNINativeInterface _Jv_JNIFunctions =
2515 RESERVED,
2516 RESERVED,
2517 RESERVED,
2518 RESERVED,
2519 _Jv_JNI_GetVersion, // GetVersion
2520 _Jv_JNI_DefineClass, // DefineClass
2521 _Jv_JNI_FindClass, // FindClass
2522 _Jv_JNI_FromReflectedMethod, // FromReflectedMethod
2523 _Jv_JNI_FromReflectedField, // FromReflectedField
2524 _Jv_JNI_ToReflectedMethod, // ToReflectedMethod
2525 _Jv_JNI_GetSuperclass, // GetSuperclass
2526 _Jv_JNI_IsAssignableFrom, // IsAssignableFrom
2527 _Jv_JNI_ToReflectedField, // ToReflectedField
2528 _Jv_JNI_Throw, // Throw
2529 _Jv_JNI_ThrowNew, // ThrowNew
2530 _Jv_JNI_ExceptionOccurred, // ExceptionOccurred
2531 _Jv_JNI_ExceptionDescribe, // ExceptionDescribe
2532 _Jv_JNI_ExceptionClear, // ExceptionClear
2533 _Jv_JNI_FatalError, // FatalError
2535 _Jv_JNI_PushLocalFrame, // PushLocalFrame
2536 _Jv_JNI_PopLocalFrame, // PopLocalFrame
2537 _Jv_JNI_NewGlobalRef, // NewGlobalRef
2538 _Jv_JNI_DeleteGlobalRef, // DeleteGlobalRef
2539 _Jv_JNI_DeleteLocalRef, // DeleteLocalRef
2541 _Jv_JNI_IsSameObject, // IsSameObject
2543 _Jv_JNI_NewLocalRef, // NewLocalRef
2544 _Jv_JNI_EnsureLocalCapacity, // EnsureLocalCapacity
2546 _Jv_JNI_AllocObject, // AllocObject
2547 _Jv_JNI_NewObject, // NewObject
2548 _Jv_JNI_NewObjectV, // NewObjectV
2549 _Jv_JNI_NewObjectA, // NewObjectA
2550 _Jv_JNI_GetObjectClass, // GetObjectClass
2551 _Jv_JNI_IsInstanceOf, // IsInstanceOf
2552 _Jv_JNI_GetAnyMethodID<false>, // GetMethodID
2554 _Jv_JNI_CallMethod<jobject>, // CallObjectMethod
2555 _Jv_JNI_CallMethodV<jobject>, // CallObjectMethodV
2556 _Jv_JNI_CallMethodA<jobject>, // CallObjectMethodA
2557 _Jv_JNI_CallMethod<jboolean>, // CallBooleanMethod
2558 _Jv_JNI_CallMethodV<jboolean>, // CallBooleanMethodV
2559 _Jv_JNI_CallMethodA<jboolean>, // CallBooleanMethodA
2560 _Jv_JNI_CallMethod<jbyte>, // CallByteMethod
2561 _Jv_JNI_CallMethodV<jbyte>, // CallByteMethodV
2562 _Jv_JNI_CallMethodA<jbyte>, // CallByteMethodA
2563 _Jv_JNI_CallMethod<jchar>, // CallCharMethod
2564 _Jv_JNI_CallMethodV<jchar>, // CallCharMethodV
2565 _Jv_JNI_CallMethodA<jchar>, // CallCharMethodA
2566 _Jv_JNI_CallMethod<jshort>, // CallShortMethod
2567 _Jv_JNI_CallMethodV<jshort>, // CallShortMethodV
2568 _Jv_JNI_CallMethodA<jshort>, // CallShortMethodA
2569 _Jv_JNI_CallMethod<jint>, // CallIntMethod
2570 _Jv_JNI_CallMethodV<jint>, // CallIntMethodV
2571 _Jv_JNI_CallMethodA<jint>, // CallIntMethodA
2572 _Jv_JNI_CallMethod<jlong>, // CallLongMethod
2573 _Jv_JNI_CallMethodV<jlong>, // CallLongMethodV
2574 _Jv_JNI_CallMethodA<jlong>, // CallLongMethodA
2575 _Jv_JNI_CallMethod<jfloat>, // CallFloatMethod
2576 _Jv_JNI_CallMethodV<jfloat>, // CallFloatMethodV
2577 _Jv_JNI_CallMethodA<jfloat>, // CallFloatMethodA
2578 _Jv_JNI_CallMethod<jdouble>, // CallDoubleMethod
2579 _Jv_JNI_CallMethodV<jdouble>, // CallDoubleMethodV
2580 _Jv_JNI_CallMethodA<jdouble>, // CallDoubleMethodA
2581 _Jv_JNI_CallVoidMethod, // CallVoidMethod
2582 _Jv_JNI_CallVoidMethodV, // CallVoidMethodV
2583 _Jv_JNI_CallVoidMethodA, // CallVoidMethodA
2585 // Nonvirtual method invocation functions follow.
2586 _Jv_JNI_CallAnyMethod<jobject, nonvirtual>, // CallNonvirtualObjectMethod
2587 _Jv_JNI_CallAnyMethodV<jobject, nonvirtual>, // CallNonvirtualObjectMethodV
2588 _Jv_JNI_CallAnyMethodA<jobject, nonvirtual>, // CallNonvirtualObjectMethodA
2589 _Jv_JNI_CallAnyMethod<jboolean, nonvirtual>, // CallNonvirtualBooleanMethod
2590 _Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodV
2591 _Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>, // CallNonvirtualBooleanMethodA
2592 _Jv_JNI_CallAnyMethod<jbyte, nonvirtual>, // CallNonvirtualByteMethod
2593 _Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>, // CallNonvirtualByteMethodV
2594 _Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>, // CallNonvirtualByteMethodA
2595 _Jv_JNI_CallAnyMethod<jchar, nonvirtual>, // CallNonvirtualCharMethod
2596 _Jv_JNI_CallAnyMethodV<jchar, nonvirtual>, // CallNonvirtualCharMethodV
2597 _Jv_JNI_CallAnyMethodA<jchar, nonvirtual>, // CallNonvirtualCharMethodA
2598 _Jv_JNI_CallAnyMethod<jshort, nonvirtual>, // CallNonvirtualShortMethod
2599 _Jv_JNI_CallAnyMethodV<jshort, nonvirtual>, // CallNonvirtualShortMethodV
2600 _Jv_JNI_CallAnyMethodA<jshort, nonvirtual>, // CallNonvirtualShortMethodA
2601 _Jv_JNI_CallAnyMethod<jint, nonvirtual>, // CallNonvirtualIntMethod
2602 _Jv_JNI_CallAnyMethodV<jint, nonvirtual>, // CallNonvirtualIntMethodV
2603 _Jv_JNI_CallAnyMethodA<jint, nonvirtual>, // CallNonvirtualIntMethodA
2604 _Jv_JNI_CallAnyMethod<jlong, nonvirtual>, // CallNonvirtualLongMethod
2605 _Jv_JNI_CallAnyMethodV<jlong, nonvirtual>, // CallNonvirtualLongMethodV
2606 _Jv_JNI_CallAnyMethodA<jlong, nonvirtual>, // CallNonvirtualLongMethodA
2607 _Jv_JNI_CallAnyMethod<jfloat, nonvirtual>, // CallNonvirtualFloatMethod
2608 _Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>, // CallNonvirtualFloatMethodV
2609 _Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>, // CallNonvirtualFloatMethodA
2610 _Jv_JNI_CallAnyMethod<jdouble, nonvirtual>, // CallNonvirtualDoubleMethod
2611 _Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodV
2612 _Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>, // CallNonvirtualDoubleMethodA
2613 _Jv_JNI_CallAnyVoidMethod<nonvirtual>, // CallNonvirtualVoidMethod
2614 _Jv_JNI_CallAnyVoidMethodV<nonvirtual>, // CallNonvirtualVoidMethodV
2615 _Jv_JNI_CallAnyVoidMethodA<nonvirtual>, // CallNonvirtualVoidMethodA
2617 _Jv_JNI_GetAnyFieldID<false>, // GetFieldID
2618 _Jv_JNI_GetField<jobject>, // GetObjectField
2619 _Jv_JNI_GetField<jboolean>, // GetBooleanField
2620 _Jv_JNI_GetField<jbyte>, // GetByteField
2621 _Jv_JNI_GetField<jchar>, // GetCharField
2622 _Jv_JNI_GetField<jshort>, // GetShortField
2623 _Jv_JNI_GetField<jint>, // GetIntField
2624 _Jv_JNI_GetField<jlong>, // GetLongField
2625 _Jv_JNI_GetField<jfloat>, // GetFloatField
2626 _Jv_JNI_GetField<jdouble>, // GetDoubleField
2627 _Jv_JNI_SetField, // SetObjectField
2628 _Jv_JNI_SetField, // SetBooleanField
2629 _Jv_JNI_SetField, // SetByteField
2630 _Jv_JNI_SetField, // SetCharField
2631 _Jv_JNI_SetField, // SetShortField
2632 _Jv_JNI_SetField, // SetIntField
2633 _Jv_JNI_SetField, // SetLongField
2634 _Jv_JNI_SetField, // SetFloatField
2635 _Jv_JNI_SetField, // SetDoubleField
2636 _Jv_JNI_GetAnyMethodID<true>, // GetStaticMethodID
2638 _Jv_JNI_CallStaticMethod<jobject>, // CallStaticObjectMethod
2639 _Jv_JNI_CallStaticMethodV<jobject>, // CallStaticObjectMethodV
2640 _Jv_JNI_CallStaticMethodA<jobject>, // CallStaticObjectMethodA
2641 _Jv_JNI_CallStaticMethod<jboolean>, // CallStaticBooleanMethod
2642 _Jv_JNI_CallStaticMethodV<jboolean>, // CallStaticBooleanMethodV
2643 _Jv_JNI_CallStaticMethodA<jboolean>, // CallStaticBooleanMethodA
2644 _Jv_JNI_CallStaticMethod<jbyte>, // CallStaticByteMethod
2645 _Jv_JNI_CallStaticMethodV<jbyte>, // CallStaticByteMethodV
2646 _Jv_JNI_CallStaticMethodA<jbyte>, // CallStaticByteMethodA
2647 _Jv_JNI_CallStaticMethod<jchar>, // CallStaticCharMethod
2648 _Jv_JNI_CallStaticMethodV<jchar>, // CallStaticCharMethodV
2649 _Jv_JNI_CallStaticMethodA<jchar>, // CallStaticCharMethodA
2650 _Jv_JNI_CallStaticMethod<jshort>, // CallStaticShortMethod
2651 _Jv_JNI_CallStaticMethodV<jshort>, // CallStaticShortMethodV
2652 _Jv_JNI_CallStaticMethodA<jshort>, // CallStaticShortMethodA
2653 _Jv_JNI_CallStaticMethod<jint>, // CallStaticIntMethod
2654 _Jv_JNI_CallStaticMethodV<jint>, // CallStaticIntMethodV
2655 _Jv_JNI_CallStaticMethodA<jint>, // CallStaticIntMethodA
2656 _Jv_JNI_CallStaticMethod<jlong>, // CallStaticLongMethod
2657 _Jv_JNI_CallStaticMethodV<jlong>, // CallStaticLongMethodV
2658 _Jv_JNI_CallStaticMethodA<jlong>, // CallStaticLongMethodA
2659 _Jv_JNI_CallStaticMethod<jfloat>, // CallStaticFloatMethod
2660 _Jv_JNI_CallStaticMethodV<jfloat>, // CallStaticFloatMethodV
2661 _Jv_JNI_CallStaticMethodA<jfloat>, // CallStaticFloatMethodA
2662 _Jv_JNI_CallStaticMethod<jdouble>, // CallStaticDoubleMethod
2663 _Jv_JNI_CallStaticMethodV<jdouble>, // CallStaticDoubleMethodV
2664 _Jv_JNI_CallStaticMethodA<jdouble>, // CallStaticDoubleMethodA
2665 _Jv_JNI_CallStaticVoidMethod, // CallStaticVoidMethod
2666 _Jv_JNI_CallStaticVoidMethodV, // CallStaticVoidMethodV
2667 _Jv_JNI_CallStaticVoidMethodA, // CallStaticVoidMethodA
2669 _Jv_JNI_GetAnyFieldID<true>, // GetStaticFieldID
2670 _Jv_JNI_GetStaticField<jobject>, // GetStaticObjectField
2671 _Jv_JNI_GetStaticField<jboolean>, // GetStaticBooleanField
2672 _Jv_JNI_GetStaticField<jbyte>, // GetStaticByteField
2673 _Jv_JNI_GetStaticField<jchar>, // GetStaticCharField
2674 _Jv_JNI_GetStaticField<jshort>, // GetStaticShortField
2675 _Jv_JNI_GetStaticField<jint>, // GetStaticIntField
2676 _Jv_JNI_GetStaticField<jlong>, // GetStaticLongField
2677 _Jv_JNI_GetStaticField<jfloat>, // GetStaticFloatField
2678 _Jv_JNI_GetStaticField<jdouble>, // GetStaticDoubleField
2679 _Jv_JNI_SetStaticField, // SetStaticObjectField
2680 _Jv_JNI_SetStaticField, // SetStaticBooleanField
2681 _Jv_JNI_SetStaticField, // SetStaticByteField
2682 _Jv_JNI_SetStaticField, // SetStaticCharField
2683 _Jv_JNI_SetStaticField, // SetStaticShortField
2684 _Jv_JNI_SetStaticField, // SetStaticIntField
2685 _Jv_JNI_SetStaticField, // SetStaticLongField
2686 _Jv_JNI_SetStaticField, // SetStaticFloatField
2687 _Jv_JNI_SetStaticField, // SetStaticDoubleField
2688 _Jv_JNI_NewString, // NewString
2689 _Jv_JNI_GetStringLength, // GetStringLength
2690 _Jv_JNI_GetStringChars, // GetStringChars
2691 _Jv_JNI_ReleaseStringChars, // ReleaseStringChars
2692 _Jv_JNI_NewStringUTF, // NewStringUTF
2693 _Jv_JNI_GetStringUTFLength, // GetStringUTFLength
2694 _Jv_JNI_GetStringUTFChars, // GetStringUTFChars
2695 _Jv_JNI_ReleaseStringUTFChars, // ReleaseStringUTFChars
2696 _Jv_JNI_GetArrayLength, // GetArrayLength
2697 _Jv_JNI_NewObjectArray, // NewObjectArray
2698 _Jv_JNI_GetObjectArrayElement, // GetObjectArrayElement
2699 _Jv_JNI_SetObjectArrayElement, // SetObjectArrayElement
2700 _Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
2701 // NewBooleanArray
2702 _Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>, // NewByteArray
2703 _Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>, // NewCharArray
2704 _Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>, // NewShortArray
2705 _Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>, // NewIntArray
2706 _Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>, // NewLongArray
2707 _Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>, // NewFloatArray
2708 _Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>, // NewDoubleArray
2709 _Jv_JNI_GetPrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2710 // GetBooleanArrayElements
2711 _Jv_JNI_GetPrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2712 // GetByteArrayElements
2713 _Jv_JNI_GetPrimitiveArrayElements<jchar, JvPrimClass (char)>,
2714 // GetCharArrayElements
2715 _Jv_JNI_GetPrimitiveArrayElements<jshort, JvPrimClass (short)>,
2716 // GetShortArrayElements
2717 _Jv_JNI_GetPrimitiveArrayElements<jint, JvPrimClass (int)>,
2718 // GetIntArrayElements
2719 _Jv_JNI_GetPrimitiveArrayElements<jlong, JvPrimClass (long)>,
2720 // GetLongArrayElements
2721 _Jv_JNI_GetPrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2722 // GetFloatArrayElements
2723 _Jv_JNI_GetPrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2724 // GetDoubleArrayElements
2725 _Jv_JNI_ReleasePrimitiveArrayElements<jboolean, JvPrimClass (boolean)>,
2726 // ReleaseBooleanArrayElements
2727 _Jv_JNI_ReleasePrimitiveArrayElements<jbyte, JvPrimClass (byte)>,
2728 // ReleaseByteArrayElements
2729 _Jv_JNI_ReleasePrimitiveArrayElements<jchar, JvPrimClass (char)>,
2730 // ReleaseCharArrayElements
2731 _Jv_JNI_ReleasePrimitiveArrayElements<jshort, JvPrimClass (short)>,
2732 // ReleaseShortArrayElements
2733 _Jv_JNI_ReleasePrimitiveArrayElements<jint, JvPrimClass (int)>,
2734 // ReleaseIntArrayElements
2735 _Jv_JNI_ReleasePrimitiveArrayElements<jlong, JvPrimClass (long)>,
2736 // ReleaseLongArrayElements
2737 _Jv_JNI_ReleasePrimitiveArrayElements<jfloat, JvPrimClass (float)>,
2738 // ReleaseFloatArrayElements
2739 _Jv_JNI_ReleasePrimitiveArrayElements<jdouble, JvPrimClass (double)>,
2740 // ReleaseDoubleArrayElements
2741 _Jv_JNI_GetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2742 // GetBooleanArrayRegion
2743 _Jv_JNI_GetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2744 // GetByteArrayRegion
2745 _Jv_JNI_GetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2746 // GetCharArrayRegion
2747 _Jv_JNI_GetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2748 // GetShortArrayRegion
2749 _Jv_JNI_GetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2750 // GetIntArrayRegion
2751 _Jv_JNI_GetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2752 // GetLongArrayRegion
2753 _Jv_JNI_GetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2754 // GetFloatArrayRegion
2755 _Jv_JNI_GetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2756 // GetDoubleArrayRegion
2757 _Jv_JNI_SetPrimitiveArrayRegion<jboolean, JvPrimClass (boolean)>,
2758 // SetBooleanArrayRegion
2759 _Jv_JNI_SetPrimitiveArrayRegion<jbyte, JvPrimClass (byte)>,
2760 // SetByteArrayRegion
2761 _Jv_JNI_SetPrimitiveArrayRegion<jchar, JvPrimClass (char)>,
2762 // SetCharArrayRegion
2763 _Jv_JNI_SetPrimitiveArrayRegion<jshort, JvPrimClass (short)>,
2764 // SetShortArrayRegion
2765 _Jv_JNI_SetPrimitiveArrayRegion<jint, JvPrimClass (int)>,
2766 // SetIntArrayRegion
2767 _Jv_JNI_SetPrimitiveArrayRegion<jlong, JvPrimClass (long)>,
2768 // SetLongArrayRegion
2769 _Jv_JNI_SetPrimitiveArrayRegion<jfloat, JvPrimClass (float)>,
2770 // SetFloatArrayRegion
2771 _Jv_JNI_SetPrimitiveArrayRegion<jdouble, JvPrimClass (double)>,
2772 // SetDoubleArrayRegion
2773 _Jv_JNI_RegisterNatives, // RegisterNatives
2774 _Jv_JNI_UnregisterNatives, // UnregisterNatives
2775 _Jv_JNI_MonitorEnter, // MonitorEnter
2776 _Jv_JNI_MonitorExit, // MonitorExit
2777 _Jv_JNI_GetJavaVM, // GetJavaVM
2779 _Jv_JNI_GetStringRegion, // GetStringRegion
2780 _Jv_JNI_GetStringUTFRegion, // GetStringUTFRegion
2781 _Jv_JNI_GetPrimitiveArrayCritical, // GetPrimitiveArrayCritical
2782 _Jv_JNI_ReleasePrimitiveArrayCritical, // ReleasePrimitiveArrayCritical
2783 _Jv_JNI_GetStringCritical, // GetStringCritical
2784 _Jv_JNI_ReleaseStringCritical, // ReleaseStringCritical
2786 _Jv_JNI_NewWeakGlobalRef, // NewWeakGlobalRef
2787 _Jv_JNI_DeleteWeakGlobalRef, // DeleteWeakGlobalRef
2789 _Jv_JNI_ExceptionCheck, // ExceptionCheck
2791 _Jv_JNI_NewDirectByteBuffer, // NewDirectByteBuffer
2792 _Jv_JNI_GetDirectBufferAddress, // GetDirectBufferAddress
2793 _Jv_JNI_GetDirectBufferCapacity // GetDirectBufferCapacity
2796 struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
2798 RESERVED,
2799 RESERVED,
2800 RESERVED,
2802 _Jv_JNI_DestroyJavaVM,
2803 _Jv_JNI_AttachCurrentThread,
2804 _Jv_JNI_DetachCurrentThread,
2805 _Jv_JNI_GetEnv,
2806 _Jv_JNI_AttachCurrentThreadAsDaemon