1 /*
2 * Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_reflection.cpp.incl"
27
28 #define JAVA_1_5_VERSION 49
29
30 static void trace_class_resolution(klassOop to_class) {
31 ResourceMark rm;
32 int line_number = -1;
33 const char * source_file = NULL;
34 klassOop caller = NULL;
35 JavaThread* jthread = JavaThread::current();
36 if (jthread->has_last_Java_frame()) {
37 vframeStream vfst(jthread);
38 // skip over any frames belonging to java.lang.Class
39 while (!vfst.at_end() &&
40 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) {
41 vfst.next();
42 }
43 if (!vfst.at_end()) {
44 // this frame is a likely suspect
45 caller = vfst.method()->method_holder();
46 line_number = vfst.method()->line_number_from_bci(vfst.bci());
47 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
48 if (s != NULL) {
49 source_file = s->as_C_string();
50 }
51 }
52 }
53 if (caller != NULL) {
54 const char * from = Klass::cast(caller)->external_name();
55 const char * to = Klass::cast(to_class)->external_name();
56 // print in a single call to reduce interleaving between threads
57 if (source_file != NULL) {
58 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
59 } else {
60 tty->print("RESOLVE %s %s (reflection)\n", from, to);
61 }
62 }
63 }
64
65
66 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
67 if (type == T_VOID) {
68 return NULL;
69 }
70 if (type == T_OBJECT || type == T_ARRAY) {
71 // regular objects are not boxed
72 return (oop) value->l;
73 }
74 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
75 if (result == NULL) {
76 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
77 }
78 return result;
79 }
80
81
82 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
83 if (box == NULL) {
84 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
85 }
86 return java_lang_boxing_object::get_value(box, value);
87 }
88
89 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
90 // Note: box is really the unboxed oop. It might even be a Short, etc.!
91 value->l = (jobject) box;
92 return T_OBJECT;
93 }
94
95
96 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
97 assert(wide_type != current_type, "widen should not be called with identical types");
98 switch (wide_type) {
99 case T_BOOLEAN:
100 case T_BYTE:
101 case T_CHAR:
102 break; // fail
103 case T_SHORT:
104 switch (current_type) {
105 case T_BYTE:
106 value->s = (jshort) value->b;
107 return;
108 }
109 break; // fail
110 case T_INT:
111 switch (current_type) {
112 case T_BYTE:
113 value->i = (jint) value->b;
114 return;
115 case T_CHAR:
116 value->i = (jint) value->c;
117 return;
118 case T_SHORT:
119 value->i = (jint) value->s;
120 return;
121 }
122 break; // fail
123 case T_LONG:
124 switch (current_type) {
125 case T_BYTE:
126 value->j = (jlong) value->b;
127 return;
128 case T_CHAR:
129 value->j = (jlong) value->c;
130 return;
131 case T_SHORT:
132 value->j = (jlong) value->s;
133 return;
134 case T_INT:
135 value->j = (jlong) value->i;
136 return;
137 }
138 break; // fail
139 case T_FLOAT:
140 switch (current_type) {
141 case T_BYTE:
142 value->f = (jfloat) value->b;
143 return;
144 case T_CHAR:
145 value->f = (jfloat) value->c;
146 return;
147 case T_SHORT:
148 value->f = (jfloat) value->s;
149 return;
150 case T_INT:
151 value->f = (jfloat) value->i;
152 return;
153 case T_LONG:
154 value->f = (jfloat) value->j;
155 return;
156 }
157 break; // fail
158 case T_DOUBLE:
159 switch (current_type) {
160 case T_BYTE:
161 value->d = (jdouble) value->b;
162 return;
163 case T_CHAR:
164 value->d = (jdouble) value->c;
165 return;
166 case T_SHORT:
167 value->d = (jdouble) value->s;
168 return;
169 case T_INT:
170 value->d = (jdouble) value->i;
171 return;
172 case T_FLOAT:
173 value->d = (jdouble) value->f;
174 return;
175 case T_LONG:
176 value->d = (jdouble) value->j;
177 return;
178 }
179 break; // fail
180 default:
181 break; // fail
182 }
183 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
184 }
185
186
187 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
188 if (!a->is_within_bounds(index)) {
189 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
190 }
191 if (a->is_objArray()) {
192 value->l = (jobject) objArrayOop(a)->obj_at(index);
193 return T_OBJECT;
194 } else {
195 assert(a->is_typeArray(), "just checking");
196 BasicType type = typeArrayKlass::cast(a->klass())->element_type();
197 switch (type) {
198 case T_BOOLEAN:
199 value->z = typeArrayOop(a)->bool_at(index);
200 break;
201 case T_CHAR:
202 value->c = typeArrayOop(a)->char_at(index);
203 break;
204 case T_FLOAT:
205 value->f = typeArrayOop(a)->float_at(index);
206 break;
207 case T_DOUBLE:
208 value->d = typeArrayOop(a)->double_at(index);
209 break;
210 case T_BYTE:
211 value->b = typeArrayOop(a)->byte_at(index);
212 break;
213 case T_SHORT:
214 value->s = typeArrayOop(a)->short_at(index);
215 break;
216 case T_INT:
217 value->i = typeArrayOop(a)->int_at(index);
218 break;
219 case T_LONG:
220 value->j = typeArrayOop(a)->long_at(index);
221 break;
222 default:
223 return T_ILLEGAL;
224 }
225 return type;
226 }
227 }
228
229
230 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
231 if (!a->is_within_bounds(index)) {
232 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
233 }
234 if (a->is_objArray()) {
235 if (value_type == T_OBJECT) {
236 oop obj = (oop) value->l;
237 if (obj != NULL) {
238 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass();
239 if (!obj->is_a(element_klass)) {
240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
241 }
242 }
243 objArrayOop(a)->obj_at_put(index, obj);
244 }
245 } else {
246 assert(a->is_typeArray(), "just checking");
247 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type();
248 if (array_type != value_type) {
249 // The widen operation can potentially throw an exception, but cannot block,
250 // so typeArrayOop a is safe if the call succeeds.
251 widen(value, value_type, array_type, CHECK);
252 }
253 switch (array_type) {
254 case T_BOOLEAN:
255 typeArrayOop(a)->bool_at_put(index, value->z);
256 break;
257 case T_CHAR:
258 typeArrayOop(a)->char_at_put(index, value->c);
259 break;
260 case T_FLOAT:
261 typeArrayOop(a)->float_at_put(index, value->f);
262 break;
263 case T_DOUBLE:
264 typeArrayOop(a)->double_at_put(index, value->d);
265 break;
266 case T_BYTE:
267 typeArrayOop(a)->byte_at_put(index, value->b);
268 break;
269 case T_SHORT:
270 typeArrayOop(a)->short_at_put(index, value->s);
271 break;
272 case T_INT:
273 typeArrayOop(a)->int_at_put(index, value->i);
274 break;
275 case T_LONG:
276 typeArrayOop(a)->long_at_put(index, value->j);
277 break;
278 default:
279 THROW(vmSymbols::java_lang_IllegalArgumentException());
280 }
281 }
282 }
283
284
285 klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
286 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
287 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
288 if (type == T_VOID) {
289 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
290 } else {
291 return Universe::typeArrayKlassObj(type);
292 }
293 }
294
295
296 oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) {
297 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type();
298 return Universe::java_mirror(type);
299 }
300
301
302 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
303 if (element_mirror == NULL) {
304 THROW_0(vmSymbols::java_lang_NullPointerException());
305 }
306 if (length < 0) {
307 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
308 }
309 if (java_lang_Class::is_primitive(element_mirror)) {
310 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
311 return typeArrayKlass::cast(tak)->allocate(length, THREAD);
312 } else {
313 klassOop k = java_lang_Class::as_klassOop(element_mirror);
314 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) {
315 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
316 }
317 return oopFactory::new_objArray(k, length, THREAD);
318 }
319 }
320
321
322 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
323 assert(dim_array->is_typeArray(), "just checking");
324 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
325
326 if (element_mirror == NULL) {
327 THROW_0(vmSymbols::java_lang_NullPointerException());
328 }
329
330 int len = dim_array->length();
331 if (len <= 0 || len > MAX_DIM) {
332 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
333 }
334
335 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
336 for (int i = 0; i < len; i++) {
337 int d = dim_array->int_at(i);
338 if (d < 0) {
339 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
340 }
341 dimensions[i] = d;
342 }
343
344 klassOop klass;
345 int dim = len;
346 if (java_lang_Class::is_primitive(element_mirror)) {
347 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
348 } else {
349 klass = java_lang_Class::as_klassOop(element_mirror);
350 if (Klass::cast(klass)->oop_is_array()) {
351 int k_dim = arrayKlass::cast(klass)->dimension();
352 if (k_dim + len > MAX_DIM) {
353 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
354 }
355 dim += k_dim;
356 }
357 }
358 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL);
359 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD);
360 assert(obj->is_array(), "just checking");
361 return arrayOop(obj);
362 }
363
364
365 oop Reflection::array_component_type(oop mirror, TRAPS) {
366 if (java_lang_Class::is_primitive(mirror)) {
367 return NULL;
368 }
369
370 klassOop klass = java_lang_Class::as_klassOop(mirror);
371 if (!Klass::cast(klass)->oop_is_array()) {
372 return NULL;
373 }
374
375 oop result = arrayKlass::cast(klass)->component_mirror();
376 #ifdef ASSERT
377 oop result2 = NULL;
378 if (arrayKlass::cast(klass)->dimension() == 1) {
379 if (Klass::cast(klass)->oop_is_typeArray()) {
380 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
381 } else {
382 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror();
383 }
384 } else {
385 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension();
386 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking");
387 result2 = Klass::cast(lower_dim)->java_mirror();
388 }
389 assert(result == result2, "results must be consistent");
390 #endif //ASSERT
391 return result;
392 }
393
394
395 bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) {
396 // field_class : declaring class
397 // acc : declared field access
398 // target_class : for protected
399
400 // Check if field or method is accessible to client. Throw an
401 // IllegalAccessException and return false if not.
402
403 // The "client" is the class associated with the nearest real frame
404 // getCallerClass already skips Method.invoke frames, so pass 0 in
405 // that case (same as classic).
406 ResourceMark rm(THREAD);
407 assert(THREAD->is_Java_thread(), "sanity check");
408 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
409
410 if (client_class != field_class) {
411 if (!verify_class_access(client_class, field_class, false)
412 || !verify_field_access(client_class,
413 field_class,
414 field_class,
415 acc,
416 false)) {
417 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
418 }
419 }
420
421 // Additional test for protected members: JLS 6.6.2
422
423 if (acc.is_protected()) {
424 if (target_class != client_class) {
425 if (!is_same_class_package(client_class, field_class)) {
426 if (!Klass::cast(target_class)->is_subclass_of(client_class)) {
427 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
428 }
429 }
430 }
431 }
432
433 // Passed all tests
434 return true;
435 }
436
437
438 bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) {
439 // Verify that current_class can access new_class. If the classloader_only
440 // flag is set, we automatically allow any accesses in which current_class
441 // doesn't have a classloader.
442 if ((current_class == NULL) ||
443 (current_class == new_class) ||
444 (instanceKlass::cast(new_class)->is_public()) ||
445 is_same_class_package(current_class, new_class)) {
446 return true;
447 }
448 // New (1.4) reflection implementation. Allow all accesses from
449 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
450 if ( JDK_Version::is_gte_jdk14x_version()
451 && UseNewReflection
452 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
453 return true;
454 }
455
456 return can_relax_access_check_for(current_class, new_class, classloader_only);
457 }
458
459 static bool under_host_klass(instanceKlass* ik, klassOop host_klass) {
460 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
461 for (;;) {
462 klassOop hc = (klassOop) ik->host_klass();
463 if (hc == NULL) return false;
464 if (hc == host_klass) return true;
465 ik = instanceKlass::cast(hc);
466
467 // There's no way to make a host class loop short of patching memory.
468 // Therefore there cannot be a loop here unles there's another bug.
469 // Still, let's check for it.
470 assert(--inf_loop_check > 0, "no host_klass loop");
471 }
472 }
473
474 bool Reflection::can_relax_access_check_for(
475 klassOop accessor, klassOop accessee, bool classloader_only) {
476 instanceKlass* accessor_ik = instanceKlass::cast(accessor);
477 instanceKlass* accessee_ik = instanceKlass::cast(accessee);
478
479 // If either is on the other's host_klass chain, access is OK,
480 // because one is inside the other.
481 if (under_host_klass(accessor_ik, accessee) ||
482 under_host_klass(accessee_ik, accessor))
483 return true;
484
485 // Adapter frames can access anything.
486 if (accessor == SystemDictionary::MethodHandle_klass() ||
487 accessor == SystemDictionary::InvokeDynamic_klass())
488 // FIXME: Hide this match logic in methodOopDesc or MethodHandleCompiler.
489 // This is an internal adapter frame from the MethodHandleCompiler.
490 return true;
491
492 if (RelaxAccessControlCheck ||
493 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
494 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
495 return classloader_only &&
496 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
497 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
498 accessor_ik->class_loader() == accessee_ik->class_loader();
499 } else {
500 return false;
501 }
502 }
503
504 bool Reflection::verify_field_access(klassOop current_class,
505 klassOop resolved_class,
506 klassOop field_class,
507 AccessFlags access,
508 bool classloader_only,
509 bool protected_restriction) {
510 // Verify that current_class can access a field of field_class, where that
511 // field's access bits are "access". We assume that we've already verified
512 // that current_class can access field_class.
513 //
514 // If the classloader_only flag is set, we automatically allow any accesses
515 // in which current_class doesn't have a classloader.
516 //
517 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
518 // need this distinction (e.g. if all we have is the runtime type, or during
519 // class file parsing when we only care about the static type); in that case
520 // callers should ensure that resolved_class == field_class.
521 //
522 if ((current_class == NULL) ||
523 (current_class == field_class) ||
524 access.is_public()) {
525 return true;
526 }
527
528 if (access.is_protected()) {
529 if (!protected_restriction) {
530 // See if current_class is a subclass of field_class
531 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
532 if (access.is_static() || // static fields are ok, see 6622385
533 current_class == resolved_class ||
534 field_class == resolved_class ||
535 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
536 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
537 return true;
538 }
539 }
540 }
541 }
542
543 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
544 return true;
545 }
546
547 // New (1.4) reflection implementation. Allow all accesses from
548 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
549 if ( JDK_Version::is_gte_jdk14x_version()
550 && UseNewReflection
551 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
552 return true;
553 }
554
555 return can_relax_access_check_for(
556 current_class, field_class, classloader_only);
557 }
558
559
560 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
561 return instanceKlass::cast(class1)->is_same_class_package(class2);
562 }
563
564 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) {
565 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
566 }
567
568
569 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
570 // throw an incompatible class change exception
571 // If inner_is_member, require the inner to be a member of the outer.
572 // If !inner_is_member, require the inner to be anonymous (a non-member).
573 // Caller is responsible for figuring out in advance which case must be true.
574 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
575 bool inner_is_member, TRAPS) {
576 const int inner_class_info_index = 0;
577 const int outer_class_info_index = 1;
578
579 typeArrayHandle icls (THREAD, outer->inner_classes());
580 constantPoolHandle cp (THREAD, outer->constants());
581 for(int i = 0; i < icls->length(); i += 4) {
582 int ioff = icls->ushort_at(i + inner_class_info_index);
583 int ooff = icls->ushort_at(i + outer_class_info_index);
584
585 if (inner_is_member && ioff != 0 && ooff != 0) {
586 klassOop o = cp->klass_at(ooff, CHECK);
587 if (o == outer()) {
588 klassOop i = cp->klass_at(ioff, CHECK);
589 if (i == inner()) {
590 return;
591 }
592 }
593 }
594 if (!inner_is_member && ioff != 0 && ooff == 0 &&
595 cp->klass_name_at_matches(inner, ioff)) {
596 klassOop i = cp->klass_at(ioff, CHECK);
597 if (i == inner()) {
598 return;
599 }
600 }
601 }
602
603 // 'inner' not declared as an inner klass in outer
604 ResourceMark rm(THREAD);
605 Exceptions::fthrow(
606 THREAD_AND_LOCATION,
607 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
608 "%s and %s disagree on InnerClasses attribute",
609 outer->external_name(),
610 inner->external_name()
611 );
612 }
613
614 // Utility method converting a single SignatureStream element into java.lang.Class instance
615
616 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
617 switch (ss->type()) {
618 default:
619 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
620 return java_lang_Class::primitive_mirror(ss->type());
621 case T_OBJECT:
622 case T_ARRAY:
623 symbolOop name = ss->as_symbol(CHECK_NULL);
624 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
625 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
626 klassOop k = SystemDictionary::resolve_or_fail(
627 symbolHandle(THREAD, name),
628 Handle(THREAD, loader),
629 Handle(THREAD, protection_domain),
630 true, CHECK_NULL);
631 if (TraceClassResolution) {
632 trace_class_resolution(k);
633 }
634 return k->klass_part()->java_mirror();
635 };
636 }
637
638
639 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
640 // Allocate array holding parameter types (java.lang.Class instances)
641 objArrayOop m = oopFactory::new_objArray(SystemDictionary::class_klass(), parameter_count, CHECK_(objArrayHandle()));
642 objArrayHandle mirrors (THREAD, m);
643 int index = 0;
644 // Collect parameter types
645 symbolHandle signature (THREAD, method->signature());
646 SignatureStream ss(signature);
647 while (!ss.at_return_type()) {
648 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
649 mirrors->obj_at_put(index++, mirror);
650 ss.next();
651 }
652 assert(index == parameter_count, "invalid parameter count");
653 if (return_type != NULL) {
654 // Collect return type as well
655 assert(ss.at_return_type(), "return type should be present");
656 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
657 }
658 return mirrors;
659 }
660
661 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
662 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
663 }
664
665
666 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
667 // Basic types
668 BasicType type = vmSymbols::signature_type(signature());
669 if (type != T_OBJECT) {
670 return Handle(THREAD, Universe::java_mirror(type));
671 }
672
673 oop loader = instanceKlass::cast(k())->class_loader();
674 oop protection_domain = Klass::cast(k())->protection_domain();
675 klassOop result = SystemDictionary::resolve_or_fail(signature,
676 Handle(THREAD, loader),
677 Handle(THREAD, protection_domain),
678 true, CHECK_(Handle()));
679
680 if (TraceClassResolution) {
681 trace_class_resolution(result);
682 }
683
684 oop nt = Klass::cast(result)->java_mirror();
685 return Handle(THREAD, nt);
686 }
687
688
689 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
690 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
691 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
692 assert(!method()->is_initializer() ||
693 (for_constant_pool_access && method()->is_static()) ||
694 (method()->name() == vmSymbols::class_initializer_name()
695 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
696 instanceKlassHandle holder (THREAD, method->method_holder());
697 int slot = method->method_idnum();
698
699 symbolHandle signature (THREAD, method->signature());
700 int parameter_count = ArgumentCount(signature).size();
701 oop return_type_oop = NULL;
702 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
703 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
704
705 Handle return_type(THREAD, return_type_oop);
706
707 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
708
709 if (exception_types.is_null()) return NULL;
710
711 symbolHandle method_name(THREAD, method->name());
712 Handle name;
713 if (intern_name) {
714 // intern_name is only true with UseNewReflection
715 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
716 name = Handle(THREAD, name_oop);
717 } else {
718 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
719 }
720 if (name.is_null()) return NULL;
721
722 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
723
724 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
725
726 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
727 java_lang_reflect_Method::set_slot(mh(), slot);
728 java_lang_reflect_Method::set_name(mh(), name());
729 java_lang_reflect_Method::set_return_type(mh(), return_type());
730 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
731 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
732 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
733 java_lang_reflect_Method::set_override(mh(), false);
734 if (java_lang_reflect_Method::has_signature_field() &&
735 method->generic_signature() != NULL) {
736 symbolHandle gs(THREAD, method->generic_signature());
737 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
738 java_lang_reflect_Method::set_signature(mh(), sig());
739 }
740 if (java_lang_reflect_Method::has_annotations_field()) {
741 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
742 }
743 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
744 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
745 }
746 if (java_lang_reflect_Method::has_annotation_default_field()) {
747 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
748 }
749 return mh();
750 }
751
752
753 oop Reflection::new_constructor(methodHandle method, TRAPS) {
754 assert(method()->is_initializer(), "should call new_method instead");
755
756 instanceKlassHandle holder (THREAD, method->method_holder());
757 int slot = method->method_idnum();
758
759 symbolHandle signature (THREAD, method->signature());
760 int parameter_count = ArgumentCount(signature).size();
761 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
762 if (parameter_types.is_null()) return NULL;
763
764 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
765 if (exception_types.is_null()) return NULL;
766
767 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
768
769 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
770
771 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
772 java_lang_reflect_Constructor::set_slot(ch(), slot);
773 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
774 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
775 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
776 java_lang_reflect_Constructor::set_override(ch(), false);
777 if (java_lang_reflect_Constructor::has_signature_field() &&
778 method->generic_signature() != NULL) {
779 symbolHandle gs(THREAD, method->generic_signature());
780 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
781 java_lang_reflect_Constructor::set_signature(ch(), sig());
782 }
783 if (java_lang_reflect_Constructor::has_annotations_field()) {
784 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
785 }
786 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
787 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
788 }
789 return ch();
790 }
791
792
793 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
794 symbolHandle field_name(THREAD, fd->name());
795 Handle name;
796 if (intern_name) {
797 // intern_name is only true with UseNewReflection
798 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
799 name = Handle(THREAD, name_oop);
800 } else {
801 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
802 }
803 symbolHandle signature (THREAD, fd->signature());
804 KlassHandle holder (THREAD, fd->field_holder());
805 Handle type = new_type(signature, holder, CHECK_NULL);
806 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
807
808 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
809 java_lang_reflect_Field::set_slot(rh(), fd->index());
810 java_lang_reflect_Field::set_name(rh(), name());
811 java_lang_reflect_Field::set_type(rh(), type());
812 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
813 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
814 java_lang_reflect_Field::set_override(rh(), false);
815 if (java_lang_reflect_Field::has_signature_field() &&
816 fd->generic_signature() != NULL) {
817 symbolHandle gs(THREAD, fd->generic_signature());
818 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
819 java_lang_reflect_Field::set_signature(rh(), sig());
820 }
821 if (java_lang_reflect_Field::has_annotations_field()) {
822 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
823 }
824 return rh();
825 }
826
827
828 //---------------------------------------------------------------------------
829 //
830 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
831 //
832 // See reflection.hpp for details.
833 //
834 //---------------------------------------------------------------------------
835
836 #ifdef SUPPORT_OLD_REFLECTION
837
838 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
839 KlassHandle recv_klass, Handle receiver, TRAPS) {
840 assert(!method.is_null() , "method should not be null");
841
842 CallInfo info;
843 symbolHandle signature (THREAD, method->signature());
844 symbolHandle name (THREAD, method->name());
845 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
846 name, signature,
847 KlassHandle(), false, true,
848 CHECK_(methodHandle()));
849 return info.selected_method();
850 }
851
852
853 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
854 Handle receiver, bool override, objArrayHandle ptypes,
855 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
856 ResourceMark rm(THREAD);
857
858 methodHandle method; // actual method to invoke
859 KlassHandle target_klass; // target klass, receiver's klass for non-static
860
861 // Ensure klass is initialized
862 klass->initialize(CHECK_NULL);
863
864 bool is_static = reflected_method->is_static();
865 if (is_static) {
866 // ignore receiver argument
867 method = reflected_method;
868 target_klass = klass;
869 } else {
870 // check for null receiver
871 if (receiver.is_null()) {
872 THROW_0(vmSymbols::java_lang_NullPointerException());
873 }
874 // Check class of receiver against class declaring method
875 if (!receiver->is_a(klass())) {
876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
877 }
878 // target klass is receiver's klass
879 target_klass = KlassHandle(THREAD, receiver->klass());
880 // no need to resolve if method is private or <init>
881 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
882 method = reflected_method;
883 } else {
884 // resolve based on the receiver
885 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
886 // resolve interface call
887 if (ReflectionWrapResolutionErrors) {
888 // new default: 6531596
889 // Match resolution errors with those thrown due to reflection inlining
890 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
891 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
892 if (HAS_PENDING_EXCEPTION) {
893 // Method resolution threw an exception; wrap it in an InvocationTargetException
894 oop resolution_exception = PENDING_EXCEPTION;
895 CLEAR_PENDING_EXCEPTION;
896 JavaCallArguments args(Handle(THREAD, resolution_exception));
897 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
898 vmSymbolHandles::throwable_void_signature(),
899 &args);
900 }
901 } else {
902 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
903 }
904 } else {
905 // if the method can be overridden, we resolve using the vtable index.
906 int index = reflected_method->vtable_index();
907 method = reflected_method;
908 if (index != methodOopDesc::nonvirtual_vtable_index) {
909 // target_klass might be an arrayKlassOop but all vtables start at
910 // the same place. The cast is to avoid virtual call and assertion.
911 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
912 method = methodHandle(THREAD, inst->method_at_vtable(index));
913 }
914 if (!method.is_null()) {
915 // Check for abstract methods as well
916 if (method->is_abstract()) {
917 // new default: 6531596
918 if (ReflectionWrapResolutionErrors) {
919 ResourceMark rm(THREAD);
920 Handle h_origexception = Exceptions::new_exception(THREAD,
921 vmSymbols::java_lang_AbstractMethodError(),
922 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
923 method->name(),
924 method->signature()));
925 JavaCallArguments args(h_origexception);
926 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
927 vmSymbolHandles::throwable_void_signature(),
928 &args);
929 } else {
930 ResourceMark rm(THREAD);
931 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
932 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
933 method->name(),
934 method->signature()));
935 }
936 }
937 }
938 }
939 }
940 }
941
942 // I believe this is a ShouldNotGetHere case which requires
943 // an internal vtable bug. If you ever get this please let Karen know.
944 if (method.is_null()) {
945 ResourceMark rm(THREAD);
946 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
947 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
948 reflected_method->name(),
949 reflected_method->signature()));
950 }
951
952 // In the JDK 1.4 reflection implementation, the security check is
953 // done at the Java level
954 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
955
956 // Access checking (unless overridden by Method)
957 if (!override) {
958 if (!(klass->is_public() && reflected_method->is_public())) {
959 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
960 if (!access) {
961 return NULL; // exception
962 }
963 }
964 }
965
966 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
967
968 assert(ptypes->is_objArray(), "just checking");
969 int args_len = args.is_null() ? 0 : args->length();
970 // Check number of arguments
971 if (ptypes->length() != args_len) {
972 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
973 }
974
975 // Create object to contain parameters for the JavaCall
976 JavaCallArguments java_args(method->size_of_parameters());
977
978 if (!is_static) {
979 java_args.push_oop(receiver);
980 }
981
982 for (int i = 0; i < args_len; i++) {
983 oop type_mirror = ptypes->obj_at(i);
984 oop arg = args->obj_at(i);
985 if (java_lang_Class::is_primitive(type_mirror)) {
986 jvalue value;
987 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
988 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
989 if (ptype != atype) {
990 widen(&value, atype, ptype, CHECK_NULL);
991 }
992 switch (ptype) {
993 case T_BOOLEAN: java_args.push_int(value.z); break;
994 case T_CHAR: java_args.push_int(value.c); break;
995 case T_BYTE: java_args.push_int(value.b); break;
996 case T_SHORT: java_args.push_int(value.s); break;
997 case T_INT: java_args.push_int(value.i); break;
998 case T_LONG: java_args.push_long(value.j); break;
999 case T_FLOAT: java_args.push_float(value.f); break;
1000 case T_DOUBLE: java_args.push_double(value.d); break;
1001 default:
1002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1003 }
1004 } else {
1005 if (arg != NULL) {
1006 klassOop k = java_lang_Class::as_klassOop(type_mirror);
1007 if (!arg->is_a(k)) {
1008 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1009 }
1010 }
1011 Handle arg_handle(THREAD, arg); // Create handle for argument
1012 java_args.push_oop(arg_handle); // Push handle
1013 }
1014 }
1015
1016 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1017
1018 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1019 // oop (i.e., NOT as an handle)
1020 JavaValue result(rtype);
1021 JavaCalls::call(&result, method, &java_args, THREAD);
1022
1023 if (HAS_PENDING_EXCEPTION) {
1024 // Method threw an exception; wrap it in an InvocationTargetException
1025 oop target_exception = PENDING_EXCEPTION;
1026 CLEAR_PENDING_EXCEPTION;
1027 JavaCallArguments args(Handle(THREAD, target_exception));
1028 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
1029 vmSymbolHandles::throwable_void_signature(),
1030 &args);
1031 } else {
1032 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1033 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1034 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1035 }
1036 }
1037
1038
1039 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1040 switch (narrow_type) {
1041 case T_BOOLEAN:
1042 value->z = (jboolean) value->i;
1043 return;
1044 case T_BYTE:
1045 value->b = (jbyte) value->i;
1046 return;
1047 case T_CHAR:
1048 value->c = (jchar) value->i;
1049 return;
1050 case T_SHORT:
1051 value->s = (jshort) value->i;
1052 return;
1053 default:
1054 break; // fail
1055 }
1056 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1057 }
1058
1059
1060 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1061 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1062 return java_lang_Class::primitive_type(basic_type_mirror);
1063 }
1064
1065
1066 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1067 int types_len = types.is_null() ? 0 : types->length();
1068 if (types_len != parameter_count) return false;
1069 if (parameter_count > 0) {
1070 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1071 for (int index = 0; index < parameter_count; index++) {
1072 if (types->obj_at(index) != method_types->obj_at(index)) {
1073 return false;
1074 }
1075 }
1076 }
1077 return true;
1078 }
1079
1080
1081 oop Reflection::new_field(FieldStream* st, TRAPS) {
1082 symbolHandle field_name(THREAD, st->name());
1083 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1084 symbolHandle signature(THREAD, st->signature());
1085 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1086 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1087 oop result = rh();
1088
1089 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1090 java_lang_reflect_Field::set_slot(result, st->index());
1091 java_lang_reflect_Field::set_name(result, name());
1092 java_lang_reflect_Field::set_type(result, type());
1093 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1094 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1095 java_lang_reflect_Field::set_override(result, false);
1096 return result;
1097 }
1098
1099
1100 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1101 if (field_mirror.is_null()) {
1102 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1103 }
1104
1105 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1106 int slot = java_lang_reflect_Field::slot(field_mirror());
1107
1108 // Ensure klass is initialized
1109 klass->initialize(CHECK_false);
1110 fd->initialize(klass(), slot);
1111
1112 bool is_static = fd->is_static();
1113 KlassHandle receiver_klass;
1114
1115 if (is_static) {
1116 receiver = KlassHandle(THREAD, klass());
1117 receiver_klass = klass;
1118 } else {
1119 // Check object is a non-null instance of declaring class
1120 if (receiver.is_null()) {
1121 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1122 }
1123 if (!receiver->is_a(klass())) {
1124 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1125 }
1126 receiver_klass = KlassHandle(THREAD, receiver->klass());
1127 }
1128
1129 // Access checking (unless overridden by Field)
1130 if (!java_lang_reflect_Field::override(field_mirror())) {
1131 if (!(klass->is_public() && fd->is_public())) {
1132 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1133 if (!access_check) {
1134 return false; // exception
1135 }
1136 }
1137 }
1138
1139 if (check_final && fd->is_final()) {
1140 // In 1.3 we always throw an error when attempting to set a final field.
1141 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1142 // We currently maintain backwards compatibility. See bug 4250960.
1143 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1144 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1145 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1146 }
1147 }
1148 return true;
1149 }
1150
1151
1152 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1153 BasicType field_type = fd->field_type();
1154 int offset = fd->offset();
1155 switch (field_type) {
1156 case T_BOOLEAN:
1157 value->z = receiver->bool_field(offset);
1158 break;
1159 case T_CHAR:
1160 value->c = receiver->char_field(offset);
1161 break;
1162 case T_FLOAT:
1163 value->f = receiver->float_field(offset);
1164 break;
1165 case T_DOUBLE:
1166 value->d = receiver->double_field(offset);
1167 break;
1168 case T_BYTE:
1169 value->b = receiver->byte_field(offset);
1170 break;
1171 case T_SHORT:
1172 value->s = receiver->short_field(offset);
1173 break;
1174 case T_INT:
1175 value->i = receiver->int_field(offset);
1176 break;
1177 case T_LONG:
1178 value->j = receiver->long_field(offset);
1179 break;
1180 case T_OBJECT:
1181 case T_ARRAY:
1182 value->l = (jobject) receiver->obj_field(offset);
1183 break;
1184 default:
1185 return T_ILLEGAL;
1186 }
1187 return field_type;
1188 }
1189
1190
1191 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1192 BasicType field_type = fd->field_type();
1193 if (field_type != value_type) {
1194 widen(value, value_type, field_type, CHECK);
1195 }
1196
1197 int offset = fd->offset();
1198 switch (field_type) {
1199 case T_BOOLEAN:
1200 receiver->bool_field_put(offset, value->z);
1201 break;
1202 case T_CHAR:
1203 receiver->char_field_put(offset, value->c);
1204 break;
1205 case T_FLOAT:
1206 receiver->float_field_put(offset, value->f);
1207 break;
1208 case T_DOUBLE:
1209 receiver->double_field_put(offset, value->d);
1210 break;
1211 case T_BYTE:
1212 receiver->byte_field_put(offset, value->b);
1213 break;
1214 case T_SHORT:
1215 receiver->short_field_put(offset, value->s);
1216 break;
1217 case T_INT:
1218 receiver->int_field_put(offset, value->i);
1219 break;
1220 case T_LONG:
1221 receiver->long_field_put(offset, value->j);
1222 break;
1223 case T_OBJECT:
1224 case T_ARRAY: {
1225 Handle obj(THREAD, (oop) value->l);
1226 if (obj.not_null()) {
1227 symbolHandle signature(THREAD, fd->signature());
1228 Handle loader (THREAD, fd->loader());
1229 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1230 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1231 if (!obj->is_a(k)) {
1232 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1233 }
1234 }
1235 receiver->obj_field_put(offset, obj());
1236 break;
1237 }
1238 default:
1239 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1240 }
1241 }
1242
1243
1244 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1245 // Exclude primitive types and array types
1246 if (java_lang_Class::is_primitive(mirror)) return NULL;
1247 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1248
1249 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1250 bool local_fields_only = (which == DECLARED);
1251
1252 // Ensure class is linked
1253 k->link_class(CHECK_NULL);
1254
1255 // Search class and interface fields
1256 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1257 if (st.name() == field_name) {
1258 if (local_fields_only || st.access_flags().is_public()) {
1259 return new_field(&st, THREAD);
1260 }
1261 }
1262 }
1263
1264 return NULL;
1265 }
1266
1267
1268 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1269 // Exclude primitive types and array types
1270 if (java_lang_Class::is_primitive(mirror)
1271 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1272 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1273 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1274 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1275 }
1276
1277 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1278
1279 // Ensure class is linked
1280 k->link_class(CHECK_NULL);
1281
1282 bool local_fields_only = (which == DECLARED);
1283 int count = 0;
1284 { // Compute fields count for class and interface fields
1285 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1286 if (local_fields_only || st.access_flags().is_public()) {
1287 count++;
1288 }
1289 }
1290 }
1291
1292 // Allocate result
1293 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1294 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1295 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1296 objArrayHandle result (THREAD, r);
1297
1298 // Fill in results backwards
1299 {
1300 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1301 if (local_fields_only || st.access_flags().is_public()) {
1302 oop field = new_field(&st, CHECK_NULL);
1303 result->obj_at_put(--count, field);
1304 }
1305 }
1306 assert(count == 0, "just checking");
1307 }
1308 return result();
1309 }
1310
1311
1312 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1313 if (java_lang_Class::is_primitive(mirror)) return NULL;
1314 klassOop klass = java_lang_Class::as_klassOop(mirror);
1315 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1316
1317 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1318 klass = SystemDictionary::object_klass();
1319 }
1320 instanceKlassHandle h_k(THREAD, klass);
1321
1322 // Ensure klass is linked (need not be initialized)
1323 h_k->link_class(CHECK_NULL);
1324
1325 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1326 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1327
1328 switch (which) {
1329 case MEMBER_PUBLIC:
1330 // First the public non-static methods (works if method holder is an interface)
1331 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1332 {
1333 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1334 methodHandle m(THREAD, st.method());
1335 // For interfaces include static initializers since classic does that!
1336 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1337 symbolHandle signature(THREAD, m->signature());
1338 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1339 if (parameter_match) {
1340 return new_method(m, false, false, THREAD);
1341 }
1342 }
1343 }
1344 }
1345 // Then the public static methods (works if method holder is an interface)
1346 {
1347 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1348 methodHandle m(THREAD, st.method());
1349 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1350 symbolHandle signature(THREAD, m->signature());
1351 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1352 if (parameter_match) {
1353 return new_method(m, false, false, THREAD);
1354 }
1355 }
1356 }
1357 }
1358 break;
1359 case MEMBER_DECLARED:
1360 // All local methods
1361 {
1362 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1363 methodHandle m(THREAD, st.method());
1364 if (method_name() == m->name() && !m->is_initializer()) {
1365 symbolHandle signature(THREAD, m->signature());
1366 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1367 if (parameter_match) {
1368 return new_method(m, false, false, THREAD);
1369 }
1370 }
1371 }
1372 }
1373 break;
1374 default:
1375 break;
1376 }
1377 return NULL;
1378 }
1379
1380
1381 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1382 // Exclude primitive types
1383 if (java_lang_Class::is_primitive(mirror) ||
1384 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1385 klassOop klass = SystemDictionary::reflect_method_klass();
1386 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1387 }
1388
1389 klassOop klass = java_lang_Class::as_klassOop(mirror);
1390 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1391 klass = SystemDictionary::object_klass();
1392 }
1393 instanceKlassHandle h_k(THREAD, klass);
1394
1395 // Ensure klass is linked (need not be initialized)
1396 h_k->link_class(CHECK_NULL);
1397
1398 // We search the (super)interfaces only if h_k is an interface itself
1399 bool is_interface = h_k->is_interface();
1400
1401 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1402 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1403
1404 switch (which) {
1405 case MEMBER_PUBLIC:
1406 {
1407
1408 // Count public methods (non-static and static)
1409 int count = 0;
1410 {
1411 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1412 methodOop m = st.method();
1413 // For interfaces include static initializers since classic does that!
1414 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1415 count++;
1416 }
1417 }
1418 }
1419
1420 // Allocate result
1421 klassOop klass = SystemDictionary::reflect_method_klass();
1422 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1423 objArrayHandle h_result (THREAD, r);
1424
1425 // Fill in results backwards
1426 {
1427 // First the non-static public methods
1428 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1429 methodHandle m (THREAD, st.method());
1430 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1431 oop method = new_method(m, false, false, CHECK_NULL);
1432 if (method == NULL) {
1433 return NULL;
1434 } else {
1435 h_result->obj_at_put(--count, method);
1436 }
1437 }
1438 }
1439 }
1440 {
1441 // Then the static public methods
1442 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1443 methodHandle m (THREAD, st.method());
1444 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1445 oop method = new_method(m, false, false, CHECK_NULL);
1446 if (method == NULL) {
1447 return NULL;
1448 } else {
1449 h_result->obj_at_put(--count, method);
1450 }
1451 }
1452 }
1453 }
1454
1455 assert(count == 0, "just checking");
1456 return h_result();
1457 }
1458
1459 case MEMBER_DECLARED:
1460 {
1461 // Count all methods
1462 int count = 0;
1463 {
1464 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1465 methodOop m = st.method();
1466 if (!m->is_initializer()) {
1467 count++;
1468 }
1469 }
1470 }
1471 // Allocate result
1472 klassOop klass = SystemDictionary::reflect_method_klass();
1473 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1474 objArrayHandle h_result (THREAD, r);
1475
1476 // Fill in results backwards
1477 {
1478 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1479 methodHandle m (THREAD, st.method());
1480 if (!m->is_initializer()) {
1481 oop method = new_method(m, false, false, CHECK_NULL);
1482 if (method == NULL) {
1483 return NULL;
1484 } else {
1485 h_result->obj_at_put(--count, method);
1486 }
1487 }
1488 }
1489 }
1490 assert(count == 0, "just checking");
1491 return h_result();
1492 }
1493 }
1494 ShouldNotReachHere();
1495 return NULL;
1496 }
1497
1498
1499 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1500
1501 // Exclude primitive, interface and array types
1502 bool prim = java_lang_Class::is_primitive(mirror);
1503 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1504 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1505
1506 // Must be instance klass
1507 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1508
1509 // Ensure klass is linked (need not be initialized)
1510 h_k->link_class(CHECK_NULL);
1511
1512 bool local_only = (which == MEMBER_DECLARED);
1513 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1514 methodHandle m(THREAD, st.method());
1515 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1516 symbolHandle signature(THREAD, m->signature());
1517 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1518 if (parameter_match) {
1519 return new_constructor(m, THREAD);
1520 }
1521 }
1522 }
1523
1524 return NULL;
1525 }
1526
1527
1528 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1529 // Exclude primitive, interface and array types
1530 bool prim = java_lang_Class::is_primitive(mirror);
1531 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1532 if (prim || k->is_interface() || k->oop_is_array()) {
1533 return oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0, CHECK_NULL); // Return empty array
1534 }
1535
1536 // Must be instanceKlass at this point
1537 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1538
1539 // Ensure klass is linked (need not be initialized)
1540 h_k->link_class(CHECK_NULL);
1541
1542 bool local_only = (which == MEMBER_DECLARED);
1543 int count = 0;
1544 {
1545 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1546 methodOop m = st.method();
1547 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1548 count++;
1549 }
1550 }
1551 }
1552
1553 // Allocate result
1554 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1555 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1556 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1557 objArrayHandle h_result (THREAD, r);
1558
1559 // Fill in results backwards
1560 {
1561 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1562 methodHandle m (THREAD, st.method());
1563 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1564 oop constr = new_constructor(m, CHECK_NULL);
1565 if (constr == NULL) {
1566 return NULL;
1567 } else {
1568 h_result->obj_at_put(--count, constr);
1569 }
1570 }
1571 }
1572 assert(count == 0, "just checking");
1573 }
1574 return h_result();
1575 }
1576
1577
1578 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1579 // of java.lang.reflect.Constructor
1580
1581 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1582 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1583 int slot = java_lang_reflect_Method::slot(method_mirror);
1584 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1585 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1586
1587 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1588 BasicType rtype;
1589 if (java_lang_Class::is_primitive(return_type_mirror)) {
1590 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1591 } else {
1592 rtype = T_OBJECT;
1593 }
1594
1595 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1596 methodOop m = klass->method_with_idnum(slot);
1597 if (m == NULL) {
1598 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1599 }
1600 methodHandle method(THREAD, m);
1601
1602 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1603 }
1604
1605
1606 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1607 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1608 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1609 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1610 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1611
1612 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1613 methodOop m = klass->method_with_idnum(slot);
1614 if (m == NULL) {
1615 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1616 }
1617 methodHandle method(THREAD, m);
1618 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1619
1620 // Make sure klass gets initialize
1621 klass->initialize(CHECK_NULL);
1622
1623 // Create new instance (the receiver)
1624 klass->check_valid_for_instantiation(false, CHECK_NULL);
1625 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1626
1627 // Ignore result from call and return receiver
1628 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1629 return receiver();
1630 }
1631
1632
1633 #endif /* SUPPORT_OLD_REFLECTION */