1 /*
2 * Copyright 1997-2009 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_MagicAccessorImpl_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 if (RelaxAccessControlCheck ||
486 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
487 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
488 return classloader_only &&
489 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
490 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
491 accessor_ik->class_loader() == accessee_ik->class_loader();
492 } else {
493 return false;
494 }
495 }
496
497 bool Reflection::verify_field_access(klassOop current_class,
498 klassOop resolved_class,
499 klassOop field_class,
500 AccessFlags access,
501 bool classloader_only,
502 bool protected_restriction) {
503 // Verify that current_class can access a field of field_class, where that
504 // field's access bits are "access". We assume that we've already verified
505 // that current_class can access field_class.
506 //
507 // If the classloader_only flag is set, we automatically allow any accesses
508 // in which current_class doesn't have a classloader.
509 //
510 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
511 // need this distinction (e.g. if all we have is the runtime type, or during
512 // class file parsing when we only care about the static type); in that case
513 // callers should ensure that resolved_class == field_class.
514 //
515 if ((current_class == NULL) ||
516 (current_class == field_class) ||
517 access.is_public()) {
518 return true;
519 }
520
521 if (access.is_protected()) {
522 if (!protected_restriction) {
523 // See if current_class is a subclass of field_class
524 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
525 if (access.is_static() || // static fields are ok, see 6622385
526 current_class == resolved_class ||
527 field_class == resolved_class ||
528 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
529 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
530 return true;
531 }
532 }
533 }
534 }
535
536 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
537 return true;
538 }
539
540 // New (1.4) reflection implementation. Allow all accesses from
541 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
542 if ( JDK_Version::is_gte_jdk14x_version()
543 && UseNewReflection
544 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
545 return true;
546 }
547
548 return can_relax_access_check_for(
549 current_class, field_class, classloader_only);
550 }
551
552
553 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
554 return instanceKlass::cast(class1)->is_same_class_package(class2);
555 }
556
557 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) {
558 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
559 }
560
561
562 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
563 // throw an incompatible class change exception
564 // If inner_is_member, require the inner to be a member of the outer.
565 // If !inner_is_member, require the inner to be anonymous (a non-member).
566 // Caller is responsible for figuring out in advance which case must be true.
567 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
568 bool inner_is_member, TRAPS) {
569 const int inner_class_info_index = 0;
570 const int outer_class_info_index = 1;
571
572 typeArrayHandle icls (THREAD, outer->inner_classes());
573 constantPoolHandle cp (THREAD, outer->constants());
574 for(int i = 0; i < icls->length(); i += 4) {
575 int ioff = icls->ushort_at(i + inner_class_info_index);
576 int ooff = icls->ushort_at(i + outer_class_info_index);
577
578 if (inner_is_member && ioff != 0 && ooff != 0) {
579 klassOop o = cp->klass_at(ooff, CHECK);
580 if (o == outer()) {
581 klassOop i = cp->klass_at(ioff, CHECK);
582 if (i == inner()) {
583 return;
584 }
585 }
586 }
587 if (!inner_is_member && ioff != 0 && ooff == 0 &&
588 cp->klass_name_at_matches(inner, ioff)) {
589 klassOop i = cp->klass_at(ioff, CHECK);
590 if (i == inner()) {
591 return;
592 }
593 }
594 }
595
596 // 'inner' not declared as an inner klass in outer
597 ResourceMark rm(THREAD);
598 Exceptions::fthrow(
599 THREAD_AND_LOCATION,
600 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
601 "%s and %s disagree on InnerClasses attribute",
602 outer->external_name(),
603 inner->external_name()
604 );
605 }
606
607 // Utility method converting a single SignatureStream element into java.lang.Class instance
608
609 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
610 switch (ss->type()) {
611 default:
612 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
613 return java_lang_Class::primitive_mirror(ss->type());
614 case T_OBJECT:
615 case T_ARRAY:
616 symbolOop name = ss->as_symbol(CHECK_NULL);
617 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
618 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
619 klassOop k = SystemDictionary::resolve_or_fail(
620 symbolHandle(THREAD, name),
621 Handle(THREAD, loader),
622 Handle(THREAD, protection_domain),
623 true, CHECK_NULL);
624 if (TraceClassResolution) {
625 trace_class_resolution(k);
626 }
627 return k->klass_part()->java_mirror();
628 };
629 }
630
631
632 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
633 // Allocate array holding parameter types (java.lang.Class instances)
634 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
635 objArrayHandle mirrors (THREAD, m);
636 int index = 0;
637 // Collect parameter types
638 symbolHandle signature (THREAD, method->signature());
639 SignatureStream ss(signature);
640 while (!ss.at_return_type()) {
641 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
642 mirrors->obj_at_put(index++, mirror);
643 ss.next();
644 }
645 assert(index == parameter_count, "invalid parameter count");
646 if (return_type != NULL) {
647 // Collect return type as well
648 assert(ss.at_return_type(), "return type should be present");
649 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
650 }
651 return mirrors;
652 }
653
654 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
655 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
656 }
657
658
659 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
660 // Basic types
661 BasicType type = vmSymbols::signature_type(signature());
662 if (type != T_OBJECT) {
663 return Handle(THREAD, Universe::java_mirror(type));
664 }
665
666 oop loader = instanceKlass::cast(k())->class_loader();
667 oop protection_domain = Klass::cast(k())->protection_domain();
668 klassOop result = SystemDictionary::resolve_or_fail(signature,
669 Handle(THREAD, loader),
670 Handle(THREAD, protection_domain),
671 true, CHECK_(Handle()));
672
673 if (TraceClassResolution) {
674 trace_class_resolution(result);
675 }
676
677 oop nt = Klass::cast(result)->java_mirror();
678 return Handle(THREAD, nt);
679 }
680
681
682 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
683 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
684 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
685 assert(!method()->is_initializer() ||
686 (for_constant_pool_access && method()->is_static()) ||
687 (method()->name() == vmSymbols::class_initializer_name()
688 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
689 instanceKlassHandle holder (THREAD, method->method_holder());
690 int slot = method->method_idnum();
691
692 symbolHandle signature (THREAD, method->signature());
693 int parameter_count = ArgumentCount(signature).size();
694 oop return_type_oop = NULL;
695 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
696 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
697
698 Handle return_type(THREAD, return_type_oop);
699
700 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
701
702 if (exception_types.is_null()) return NULL;
703
704 symbolHandle method_name(THREAD, method->name());
705 Handle name;
706 if (intern_name) {
707 // intern_name is only true with UseNewReflection
708 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
709 name = Handle(THREAD, name_oop);
710 } else {
711 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
712 }
713 if (name.is_null()) return NULL;
714
715 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
716
717 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
718
719 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
720 java_lang_reflect_Method::set_slot(mh(), slot);
721 java_lang_reflect_Method::set_name(mh(), name());
722 java_lang_reflect_Method::set_return_type(mh(), return_type());
723 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
724 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
725 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
726 java_lang_reflect_Method::set_override(mh(), false);
727 if (java_lang_reflect_Method::has_signature_field() &&
728 method->generic_signature() != NULL) {
729 symbolHandle gs(THREAD, method->generic_signature());
730 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
731 java_lang_reflect_Method::set_signature(mh(), sig());
732 }
733 if (java_lang_reflect_Method::has_annotations_field()) {
734 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
735 }
736 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
737 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
738 }
739 if (java_lang_reflect_Method::has_annotation_default_field()) {
740 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
741 }
742 return mh();
743 }
744
745
746 oop Reflection::new_constructor(methodHandle method, TRAPS) {
747 assert(method()->is_initializer(), "should call new_method instead");
748
749 instanceKlassHandle holder (THREAD, method->method_holder());
750 int slot = method->method_idnum();
751
752 symbolHandle signature (THREAD, method->signature());
753 int parameter_count = ArgumentCount(signature).size();
754 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
755 if (parameter_types.is_null()) return NULL;
756
757 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
758 if (exception_types.is_null()) return NULL;
759
760 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
761
762 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
763
764 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
765 java_lang_reflect_Constructor::set_slot(ch(), slot);
766 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
767 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
768 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
769 java_lang_reflect_Constructor::set_override(ch(), false);
770 if (java_lang_reflect_Constructor::has_signature_field() &&
771 method->generic_signature() != NULL) {
772 symbolHandle gs(THREAD, method->generic_signature());
773 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
774 java_lang_reflect_Constructor::set_signature(ch(), sig());
775 }
776 if (java_lang_reflect_Constructor::has_annotations_field()) {
777 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
778 }
779 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
780 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
781 }
782 return ch();
783 }
784
785
786 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
787 symbolHandle field_name(THREAD, fd->name());
788 Handle name;
789 if (intern_name) {
790 // intern_name is only true with UseNewReflection
791 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
792 name = Handle(THREAD, name_oop);
793 } else {
794 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
795 }
796 symbolHandle signature (THREAD, fd->signature());
797 KlassHandle holder (THREAD, fd->field_holder());
798 Handle type = new_type(signature, holder, CHECK_NULL);
799 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
800
801 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
802 java_lang_reflect_Field::set_slot(rh(), fd->index());
803 java_lang_reflect_Field::set_name(rh(), name());
804 java_lang_reflect_Field::set_type(rh(), type());
805 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
806 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
807 java_lang_reflect_Field::set_override(rh(), false);
808 if (java_lang_reflect_Field::has_signature_field() &&
809 fd->generic_signature() != NULL) {
810 symbolHandle gs(THREAD, fd->generic_signature());
811 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
812 java_lang_reflect_Field::set_signature(rh(), sig());
813 }
814 if (java_lang_reflect_Field::has_annotations_field()) {
815 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
816 }
817 return rh();
818 }
819
820
821 //---------------------------------------------------------------------------
822 //
823 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
824 //
825 // See reflection.hpp for details.
826 //
827 //---------------------------------------------------------------------------
828
829 #ifdef SUPPORT_OLD_REFLECTION
830
831 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
832 KlassHandle recv_klass, Handle receiver, TRAPS) {
833 assert(!method.is_null() , "method should not be null");
834
835 CallInfo info;
836 symbolHandle signature (THREAD, method->signature());
837 symbolHandle name (THREAD, method->name());
838 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
839 name, signature,
840 KlassHandle(), false, true,
841 CHECK_(methodHandle()));
842 return info.selected_method();
843 }
844
845
846 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
847 Handle receiver, bool override, objArrayHandle ptypes,
848 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
849 ResourceMark rm(THREAD);
850
851 methodHandle method; // actual method to invoke
852 KlassHandle target_klass; // target klass, receiver's klass for non-static
853
854 // Ensure klass is initialized
855 klass->initialize(CHECK_NULL);
856
857 bool is_static = reflected_method->is_static();
858 if (is_static) {
859 // ignore receiver argument
860 method = reflected_method;
861 target_klass = klass;
862 } else {
863 // check for null receiver
864 if (receiver.is_null()) {
865 THROW_0(vmSymbols::java_lang_NullPointerException());
866 }
867 // Check class of receiver against class declaring method
868 if (!receiver->is_a(klass())) {
869 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
870 }
871 // target klass is receiver's klass
872 target_klass = KlassHandle(THREAD, receiver->klass());
873 // no need to resolve if method is private or <init>
874 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
875 method = reflected_method;
876 } else {
877 // resolve based on the receiver
878 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
879 // resolve interface call
880 if (ReflectionWrapResolutionErrors) {
881 // new default: 6531596
882 // Match resolution errors with those thrown due to reflection inlining
883 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
884 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
885 if (HAS_PENDING_EXCEPTION) {
886 // Method resolution threw an exception; wrap it in an InvocationTargetException
887 oop resolution_exception = PENDING_EXCEPTION;
888 CLEAR_PENDING_EXCEPTION;
889 JavaCallArguments args(Handle(THREAD, resolution_exception));
890 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
891 vmSymbolHandles::throwable_void_signature(),
892 &args);
893 }
894 } else {
895 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
896 }
897 } else {
898 // if the method can be overridden, we resolve using the vtable index.
899 int index = reflected_method->vtable_index();
900 method = reflected_method;
901 if (index != methodOopDesc::nonvirtual_vtable_index) {
902 // target_klass might be an arrayKlassOop but all vtables start at
903 // the same place. The cast is to avoid virtual call and assertion.
904 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
905 method = methodHandle(THREAD, inst->method_at_vtable(index));
906 }
907 if (!method.is_null()) {
908 // Check for abstract methods as well
909 if (method->is_abstract()) {
910 // new default: 6531596
911 if (ReflectionWrapResolutionErrors) {
912 ResourceMark rm(THREAD);
913 Handle h_origexception = Exceptions::new_exception(THREAD,
914 vmSymbols::java_lang_AbstractMethodError(),
915 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
916 method->name(),
917 method->signature()));
918 JavaCallArguments args(h_origexception);
919 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
920 vmSymbolHandles::throwable_void_signature(),
921 &args);
922 } else {
923 ResourceMark rm(THREAD);
924 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
925 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
926 method->name(),
927 method->signature()));
928 }
929 }
930 }
931 }
932 }
933 }
934
935 // I believe this is a ShouldNotGetHere case which requires
936 // an internal vtable bug. If you ever get this please let Karen know.
937 if (method.is_null()) {
938 ResourceMark rm(THREAD);
939 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
940 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
941 reflected_method->name(),
942 reflected_method->signature()));
943 }
944
945 // In the JDK 1.4 reflection implementation, the security check is
946 // done at the Java level
947 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
948
949 // Access checking (unless overridden by Method)
950 if (!override) {
951 if (!(klass->is_public() && reflected_method->is_public())) {
952 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
953 if (!access) {
954 return NULL; // exception
955 }
956 }
957 }
958
959 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
960
961 assert(ptypes->is_objArray(), "just checking");
962 int args_len = args.is_null() ? 0 : args->length();
963 // Check number of arguments
964 if (ptypes->length() != args_len) {
965 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
966 }
967
968 // Create object to contain parameters for the JavaCall
969 JavaCallArguments java_args(method->size_of_parameters());
970
971 if (!is_static) {
972 java_args.push_oop(receiver);
973 }
974
975 for (int i = 0; i < args_len; i++) {
976 oop type_mirror = ptypes->obj_at(i);
977 oop arg = args->obj_at(i);
978 if (java_lang_Class::is_primitive(type_mirror)) {
979 jvalue value;
980 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
981 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
982 if (ptype != atype) {
983 widen(&value, atype, ptype, CHECK_NULL);
984 }
985 switch (ptype) {
986 case T_BOOLEAN: java_args.push_int(value.z); break;
987 case T_CHAR: java_args.push_int(value.c); break;
988 case T_BYTE: java_args.push_int(value.b); break;
989 case T_SHORT: java_args.push_int(value.s); break;
990 case T_INT: java_args.push_int(value.i); break;
991 case T_LONG: java_args.push_long(value.j); break;
992 case T_FLOAT: java_args.push_float(value.f); break;
993 case T_DOUBLE: java_args.push_double(value.d); break;
994 default:
995 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
996 }
997 } else {
998 if (arg != NULL) {
999 klassOop k = java_lang_Class::as_klassOop(type_mirror);
1000 if (!arg->is_a(k)) {
1001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1002 }
1003 }
1004 Handle arg_handle(THREAD, arg); // Create handle for argument
1005 java_args.push_oop(arg_handle); // Push handle
1006 }
1007 }
1008
1009 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1010
1011 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1012 // oop (i.e., NOT as an handle)
1013 JavaValue result(rtype);
1014 JavaCalls::call(&result, method, &java_args, THREAD);
1015
1016 if (HAS_PENDING_EXCEPTION) {
1017 // Method threw an exception; wrap it in an InvocationTargetException
1018 oop target_exception = PENDING_EXCEPTION;
1019 CLEAR_PENDING_EXCEPTION;
1020 JavaCallArguments args(Handle(THREAD, target_exception));
1021 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
1022 vmSymbolHandles::throwable_void_signature(),
1023 &args);
1024 } else {
1025 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1026 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1027 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1028 }
1029 }
1030
1031
1032 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1033 switch (narrow_type) {
1034 case T_BOOLEAN:
1035 value->z = (jboolean) value->i;
1036 return;
1037 case T_BYTE:
1038 value->b = (jbyte) value->i;
1039 return;
1040 case T_CHAR:
1041 value->c = (jchar) value->i;
1042 return;
1043 case T_SHORT:
1044 value->s = (jshort) value->i;
1045 return;
1046 default:
1047 break; // fail
1048 }
1049 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1050 }
1051
1052
1053 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1054 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1055 return java_lang_Class::primitive_type(basic_type_mirror);
1056 }
1057
1058
1059 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1060 int types_len = types.is_null() ? 0 : types->length();
1061 if (types_len != parameter_count) return false;
1062 if (parameter_count > 0) {
1063 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1064 for (int index = 0; index < parameter_count; index++) {
1065 if (types->obj_at(index) != method_types->obj_at(index)) {
1066 return false;
1067 }
1068 }
1069 }
1070 return true;
1071 }
1072
1073
1074 oop Reflection::new_field(FieldStream* st, TRAPS) {
1075 symbolHandle field_name(THREAD, st->name());
1076 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1077 symbolHandle signature(THREAD, st->signature());
1078 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1079 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1080 oop result = rh();
1081
1082 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1083 java_lang_reflect_Field::set_slot(result, st->index());
1084 java_lang_reflect_Field::set_name(result, name());
1085 java_lang_reflect_Field::set_type(result, type());
1086 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1087 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1088 java_lang_reflect_Field::set_override(result, false);
1089 return result;
1090 }
1091
1092
1093 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1094 if (field_mirror.is_null()) {
1095 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1096 }
1097
1098 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1099 int slot = java_lang_reflect_Field::slot(field_mirror());
1100
1101 // Ensure klass is initialized
1102 klass->initialize(CHECK_false);
1103 fd->initialize(klass(), slot);
1104
1105 bool is_static = fd->is_static();
1106 KlassHandle receiver_klass;
1107
1108 if (is_static) {
1109 receiver = KlassHandle(THREAD, klass());
1110 receiver_klass = klass;
1111 } else {
1112 // Check object is a non-null instance of declaring class
1113 if (receiver.is_null()) {
1114 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1115 }
1116 if (!receiver->is_a(klass())) {
1117 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1118 }
1119 receiver_klass = KlassHandle(THREAD, receiver->klass());
1120 }
1121
1122 // Access checking (unless overridden by Field)
1123 if (!java_lang_reflect_Field::override(field_mirror())) {
1124 if (!(klass->is_public() && fd->is_public())) {
1125 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1126 if (!access_check) {
1127 return false; // exception
1128 }
1129 }
1130 }
1131
1132 if (check_final && fd->is_final()) {
1133 // In 1.3 we always throw an error when attempting to set a final field.
1134 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1135 // We currently maintain backwards compatibility. See bug 4250960.
1136 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1137 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1138 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1139 }
1140 }
1141 return true;
1142 }
1143
1144
1145 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1146 BasicType field_type = fd->field_type();
1147 int offset = fd->offset();
1148 switch (field_type) {
1149 case T_BOOLEAN:
1150 value->z = receiver->bool_field(offset);
1151 break;
1152 case T_CHAR:
1153 value->c = receiver->char_field(offset);
1154 break;
1155 case T_FLOAT:
1156 value->f = receiver->float_field(offset);
1157 break;
1158 case T_DOUBLE:
1159 value->d = receiver->double_field(offset);
1160 break;
1161 case T_BYTE:
1162 value->b = receiver->byte_field(offset);
1163 break;
1164 case T_SHORT:
1165 value->s = receiver->short_field(offset);
1166 break;
1167 case T_INT:
1168 value->i = receiver->int_field(offset);
1169 break;
1170 case T_LONG:
1171 value->j = receiver->long_field(offset);
1172 break;
1173 case T_OBJECT:
1174 case T_ARRAY:
1175 value->l = (jobject) receiver->obj_field(offset);
1176 break;
1177 default:
1178 return T_ILLEGAL;
1179 }
1180 return field_type;
1181 }
1182
1183
1184 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1185 BasicType field_type = fd->field_type();
1186 if (field_type != value_type) {
1187 widen(value, value_type, field_type, CHECK);
1188 }
1189
1190 int offset = fd->offset();
1191 switch (field_type) {
1192 case T_BOOLEAN:
1193 receiver->bool_field_put(offset, value->z);
1194 break;
1195 case T_CHAR:
1196 receiver->char_field_put(offset, value->c);
1197 break;
1198 case T_FLOAT:
1199 receiver->float_field_put(offset, value->f);
1200 break;
1201 case T_DOUBLE:
1202 receiver->double_field_put(offset, value->d);
1203 break;
1204 case T_BYTE:
1205 receiver->byte_field_put(offset, value->b);
1206 break;
1207 case T_SHORT:
1208 receiver->short_field_put(offset, value->s);
1209 break;
1210 case T_INT:
1211 receiver->int_field_put(offset, value->i);
1212 break;
1213 case T_LONG:
1214 receiver->long_field_put(offset, value->j);
1215 break;
1216 case T_OBJECT:
1217 case T_ARRAY: {
1218 Handle obj(THREAD, (oop) value->l);
1219 if (obj.not_null()) {
1220 symbolHandle signature(THREAD, fd->signature());
1221 Handle loader (THREAD, fd->loader());
1222 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1223 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1224 if (!obj->is_a(k)) {
1225 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1226 }
1227 }
1228 receiver->obj_field_put(offset, obj());
1229 break;
1230 }
1231 default:
1232 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1233 }
1234 }
1235
1236
1237 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1238 // Exclude primitive types and array types
1239 if (java_lang_Class::is_primitive(mirror)) return NULL;
1240 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1241
1242 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1243 bool local_fields_only = (which == DECLARED);
1244
1245 // Ensure class is linked
1246 k->link_class(CHECK_NULL);
1247
1248 // Search class and interface fields
1249 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1250 if (st.name() == field_name) {
1251 if (local_fields_only || st.access_flags().is_public()) {
1252 return new_field(&st, THREAD);
1253 }
1254 }
1255 }
1256
1257 return NULL;
1258 }
1259
1260
1261 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1262 // Exclude primitive types and array types
1263 if (java_lang_Class::is_primitive(mirror)
1264 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1265 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1266 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1267 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1268 }
1269
1270 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1271
1272 // Ensure class is linked
1273 k->link_class(CHECK_NULL);
1274
1275 bool local_fields_only = (which == DECLARED);
1276 int count = 0;
1277 { // Compute fields count for class and interface fields
1278 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1279 if (local_fields_only || st.access_flags().is_public()) {
1280 count++;
1281 }
1282 }
1283 }
1284
1285 // Allocate result
1286 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1287 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1288 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1289 objArrayHandle result (THREAD, r);
1290
1291 // Fill in results backwards
1292 {
1293 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1294 if (local_fields_only || st.access_flags().is_public()) {
1295 oop field = new_field(&st, CHECK_NULL);
1296 result->obj_at_put(--count, field);
1297 }
1298 }
1299 assert(count == 0, "just checking");
1300 }
1301 return result();
1302 }
1303
1304
1305 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1306 if (java_lang_Class::is_primitive(mirror)) return NULL;
1307 klassOop klass = java_lang_Class::as_klassOop(mirror);
1308 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1309
1310 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1311 klass = SystemDictionary::Object_klass();
1312 }
1313 instanceKlassHandle h_k(THREAD, klass);
1314
1315 // Ensure klass is linked (need not be initialized)
1316 h_k->link_class(CHECK_NULL);
1317
1318 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1319 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1320
1321 switch (which) {
1322 case MEMBER_PUBLIC:
1323 // First the public non-static methods (works if method holder is an interface)
1324 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1325 {
1326 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1327 methodHandle m(THREAD, st.method());
1328 // For interfaces include static initializers since classic does that!
1329 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1330 symbolHandle signature(THREAD, m->signature());
1331 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1332 if (parameter_match) {
1333 return new_method(m, false, false, THREAD);
1334 }
1335 }
1336 }
1337 }
1338 // Then the public static methods (works if method holder is an interface)
1339 {
1340 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1341 methodHandle m(THREAD, st.method());
1342 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1343 symbolHandle signature(THREAD, m->signature());
1344 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1345 if (parameter_match) {
1346 return new_method(m, false, false, THREAD);
1347 }
1348 }
1349 }
1350 }
1351 break;
1352 case MEMBER_DECLARED:
1353 // All local methods
1354 {
1355 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1356 methodHandle m(THREAD, st.method());
1357 if (method_name() == m->name() && !m->is_initializer()) {
1358 symbolHandle signature(THREAD, m->signature());
1359 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1360 if (parameter_match) {
1361 return new_method(m, false, false, THREAD);
1362 }
1363 }
1364 }
1365 }
1366 break;
1367 default:
1368 break;
1369 }
1370 return NULL;
1371 }
1372
1373
1374 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1375 // Exclude primitive types
1376 if (java_lang_Class::is_primitive(mirror) ||
1377 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1378 klassOop klass = SystemDictionary::reflect_Method_klass();
1379 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1380 }
1381
1382 klassOop klass = java_lang_Class::as_klassOop(mirror);
1383 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1384 klass = SystemDictionary::Object_klass();
1385 }
1386 instanceKlassHandle h_k(THREAD, klass);
1387
1388 // Ensure klass is linked (need not be initialized)
1389 h_k->link_class(CHECK_NULL);
1390
1391 // We search the (super)interfaces only if h_k is an interface itself
1392 bool is_interface = h_k->is_interface();
1393
1394 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1395 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1396
1397 switch (which) {
1398 case MEMBER_PUBLIC:
1399 {
1400
1401 // Count public methods (non-static and static)
1402 int count = 0;
1403 {
1404 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1405 methodOop m = st.method();
1406 // For interfaces include static initializers since classic does that!
1407 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1408 count++;
1409 }
1410 }
1411 }
1412
1413 // Allocate result
1414 klassOop klass = SystemDictionary::reflect_Method_klass();
1415 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1416 objArrayHandle h_result (THREAD, r);
1417
1418 // Fill in results backwards
1419 {
1420 // First the non-static public methods
1421 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1422 methodHandle m (THREAD, st.method());
1423 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1424 oop method = new_method(m, false, false, CHECK_NULL);
1425 if (method == NULL) {
1426 return NULL;
1427 } else {
1428 h_result->obj_at_put(--count, method);
1429 }
1430 }
1431 }
1432 }
1433 {
1434 // Then the static public methods
1435 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1436 methodHandle m (THREAD, st.method());
1437 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1438 oop method = new_method(m, false, false, CHECK_NULL);
1439 if (method == NULL) {
1440 return NULL;
1441 } else {
1442 h_result->obj_at_put(--count, method);
1443 }
1444 }
1445 }
1446 }
1447
1448 assert(count == 0, "just checking");
1449 return h_result();
1450 }
1451
1452 case MEMBER_DECLARED:
1453 {
1454 // Count all methods
1455 int count = 0;
1456 {
1457 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1458 methodOop m = st.method();
1459 if (!m->is_initializer()) {
1460 count++;
1461 }
1462 }
1463 }
1464 // Allocate result
1465 klassOop klass = SystemDictionary::reflect_Method_klass();
1466 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1467 objArrayHandle h_result (THREAD, r);
1468
1469 // Fill in results backwards
1470 {
1471 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1472 methodHandle m (THREAD, st.method());
1473 if (!m->is_initializer()) {
1474 oop method = new_method(m, false, false, CHECK_NULL);
1475 if (method == NULL) {
1476 return NULL;
1477 } else {
1478 h_result->obj_at_put(--count, method);
1479 }
1480 }
1481 }
1482 }
1483 assert(count == 0, "just checking");
1484 return h_result();
1485 }
1486 }
1487 ShouldNotReachHere();
1488 return NULL;
1489 }
1490
1491
1492 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1493
1494 // Exclude primitive, interface and array types
1495 bool prim = java_lang_Class::is_primitive(mirror);
1496 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1497 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1498
1499 // Must be instance klass
1500 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1501
1502 // Ensure klass is linked (need not be initialized)
1503 h_k->link_class(CHECK_NULL);
1504
1505 bool local_only = (which == MEMBER_DECLARED);
1506 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1507 methodHandle m(THREAD, st.method());
1508 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1509 symbolHandle signature(THREAD, m->signature());
1510 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1511 if (parameter_match) {
1512 return new_constructor(m, THREAD);
1513 }
1514 }
1515 }
1516
1517 return NULL;
1518 }
1519
1520
1521 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1522 // Exclude primitive, interface and array types
1523 bool prim = java_lang_Class::is_primitive(mirror);
1524 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1525 if (prim || k->is_interface() || k->oop_is_array()) {
1526 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array
1527 }
1528
1529 // Must be instanceKlass at this point
1530 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1531
1532 // Ensure klass is linked (need not be initialized)
1533 h_k->link_class(CHECK_NULL);
1534
1535 bool local_only = (which == MEMBER_DECLARED);
1536 int count = 0;
1537 {
1538 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1539 methodOop m = st.method();
1540 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1541 count++;
1542 }
1543 }
1544 }
1545
1546 // Allocate result
1547 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1548 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1549 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1550 objArrayHandle h_result (THREAD, r);
1551
1552 // Fill in results backwards
1553 {
1554 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1555 methodHandle m (THREAD, st.method());
1556 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1557 oop constr = new_constructor(m, CHECK_NULL);
1558 if (constr == NULL) {
1559 return NULL;
1560 } else {
1561 h_result->obj_at_put(--count, constr);
1562 }
1563 }
1564 }
1565 assert(count == 0, "just checking");
1566 }
1567 return h_result();
1568 }
1569
1570
1571 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1572 // of java.lang.reflect.Constructor
1573
1574 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1575 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1576 int slot = java_lang_reflect_Method::slot(method_mirror);
1577 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1578 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1579
1580 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1581 BasicType rtype;
1582 if (java_lang_Class::is_primitive(return_type_mirror)) {
1583 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1584 } else {
1585 rtype = T_OBJECT;
1586 }
1587
1588 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1589 methodOop m = klass->method_with_idnum(slot);
1590 if (m == NULL) {
1591 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1592 }
1593 methodHandle method(THREAD, m);
1594
1595 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1596 }
1597
1598
1599 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1600 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1601 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1602 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1603 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1604
1605 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1606 methodOop m = klass->method_with_idnum(slot);
1607 if (m == NULL) {
1608 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1609 }
1610 methodHandle method(THREAD, m);
1611 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1612
1613 // Make sure klass gets initialize
1614 klass->initialize(CHECK_NULL);
1615
1616 // Create new instance (the receiver)
1617 klass->check_valid_for_instantiation(false, CHECK_NULL);
1618 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1619
1620 // Ignore result from call and return receiver
1621 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1622 return receiver();
1623 }
1624
1625
1626 #endif /* SUPPORT_OLD_REFLECTION */