Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/reflection.cpp@ffe19141e312
src/share/vm/runtime/reflection.cpp
Fri, 12 Dec 2008 15:37:46 -0800
- author
- jmasa
- date
- Fri, 12 Dec 2008 15:37:46 -0800
- changeset 919
- ffe19141e312
- parent 866
- a45484ea312d
- child 1100
- c89f86385056
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright 1997-2008 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 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_reflection.cpp.incl"
28 #define JAVA_1_5_VERSION 49
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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");
326 if (element_mirror == NULL) {
327 THROW_0(vmSymbols::java_lang_NullPointerException());
328 }
330 int len = dim_array->length();
331 if (len <= 0 || len > MAX_DIM) {
332 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
333 }
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 }
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 }
365 oop Reflection::array_component_type(oop mirror, TRAPS) {
366 if (java_lang_Class::is_primitive(mirror)) {
367 return NULL;
368 }
370 klassOop klass = java_lang_Class::as_klassOop(mirror);
371 if (!Klass::cast(klass)->oop_is_array()) {
372 return NULL;
373 }
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 }
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
400 // Check if field or method is accessible to client. Throw an
401 // IllegalAccessException and return false if not.
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);
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 }
421 // Additional test for protected members: JLS 6.6.2
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 }
433 // Passed all tests
434 return true;
435 }
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 }
456 return can_relax_access_check_for(current_class, new_class, classloader_only);
457 }
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);
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 }
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);
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;
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 }
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 }
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 }
536 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
537 return true;
538 }
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_magic_klass())) {
545 return true;
546 }
548 return can_relax_access_check_for(
549 current_class, field_class, classloader_only);
550 }
553 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
554 return instanceKlass::cast(class1)->is_same_class_package(class2);
555 }
558 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
559 // throw an incompatible class change exception
560 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, TRAPS) {
561 const int inner_class_info_index = 0;
562 const int outer_class_info_index = 1;
564 typeArrayHandle icls (THREAD, outer->inner_classes());
565 constantPoolHandle cp (THREAD, outer->constants());
566 for(int i = 0; i < icls->length(); i += 4) {
567 int ioff = icls->ushort_at(i + inner_class_info_index);
568 int ooff = icls->ushort_at(i + outer_class_info_index);
570 if (ioff != 0 && ooff != 0) {
571 klassOop o = cp->klass_at(ooff, CHECK);
572 if (o == outer()) {
573 klassOop i = cp->klass_at(ioff, CHECK);
574 if (i == inner()) {
575 return;
576 }
577 }
578 }
579 }
581 // 'inner' not declared as an inner klass in outer
582 ResourceMark rm(THREAD);
583 Exceptions::fthrow(
584 THREAD_AND_LOCATION,
585 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
586 "%s and %s disagree on InnerClasses attribute",
587 outer->external_name(),
588 inner->external_name()
589 );
590 }
592 // Utility method converting a single SignatureStream element into java.lang.Class instance
594 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
595 switch (ss->type()) {
596 default:
597 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
598 return java_lang_Class::primitive_mirror(ss->type());
599 case T_OBJECT:
600 case T_ARRAY:
601 symbolOop name = ss->as_symbol(CHECK_NULL);
602 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
603 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
604 klassOop k = SystemDictionary::resolve_or_fail(
605 symbolHandle(THREAD, name),
606 Handle(THREAD, loader),
607 Handle(THREAD, protection_domain),
608 true, CHECK_NULL);
609 if (TraceClassResolution) {
610 trace_class_resolution(k);
611 }
612 return k->klass_part()->java_mirror();
613 };
614 }
617 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
618 // Allocate array holding parameter types (java.lang.Class instances)
619 objArrayOop m = oopFactory::new_objArray(SystemDictionary::class_klass(), parameter_count, CHECK_(objArrayHandle()));
620 objArrayHandle mirrors (THREAD, m);
621 int index = 0;
622 // Collect parameter types
623 symbolHandle signature (THREAD, method->signature());
624 SignatureStream ss(signature);
625 while (!ss.at_return_type()) {
626 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
627 mirrors->obj_at_put(index++, mirror);
628 ss.next();
629 }
630 assert(index == parameter_count, "invalid parameter count");
631 if (return_type != NULL) {
632 // Collect return type as well
633 assert(ss.at_return_type(), "return type should be present");
634 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
635 }
636 return mirrors;
637 }
639 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
640 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
641 }
644 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
645 // Basic types
646 BasicType type = vmSymbols::signature_type(signature());
647 if (type != T_OBJECT) {
648 return Handle(THREAD, Universe::java_mirror(type));
649 }
651 oop loader = instanceKlass::cast(k())->class_loader();
652 oop protection_domain = Klass::cast(k())->protection_domain();
653 klassOop result = SystemDictionary::resolve_or_fail(signature,
654 Handle(THREAD, loader),
655 Handle(THREAD, protection_domain),
656 true, CHECK_(Handle()));
658 if (TraceClassResolution) {
659 trace_class_resolution(result);
660 }
662 oop nt = Klass::cast(result)->java_mirror();
663 return Handle(THREAD, nt);
664 }
667 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
668 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
669 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
670 assert(!method()->is_initializer() ||
671 (for_constant_pool_access && method()->is_static()) ||
672 (method()->name() == vmSymbols::class_initializer_name()
673 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
674 instanceKlassHandle holder (THREAD, method->method_holder());
675 int slot = method->method_idnum();
677 symbolHandle signature (THREAD, method->signature());
678 int parameter_count = ArgumentCount(signature).size();
679 oop return_type_oop = NULL;
680 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
681 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
683 Handle return_type(THREAD, return_type_oop);
685 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
687 if (exception_types.is_null()) return NULL;
689 symbolHandle method_name(THREAD, method->name());
690 Handle name;
691 if (intern_name) {
692 // intern_name is only true with UseNewReflection
693 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
694 name = Handle(THREAD, name_oop);
695 } else {
696 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
697 }
698 if (name.is_null()) return NULL;
700 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
702 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
704 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
705 java_lang_reflect_Method::set_slot(mh(), slot);
706 java_lang_reflect_Method::set_name(mh(), name());
707 java_lang_reflect_Method::set_return_type(mh(), return_type());
708 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
709 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
710 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
711 java_lang_reflect_Method::set_override(mh(), false);
712 if (java_lang_reflect_Method::has_signature_field() &&
713 method->generic_signature() != NULL) {
714 symbolHandle gs(THREAD, method->generic_signature());
715 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
716 java_lang_reflect_Method::set_signature(mh(), sig());
717 }
718 if (java_lang_reflect_Method::has_annotations_field()) {
719 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
720 }
721 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
722 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
723 }
724 if (java_lang_reflect_Method::has_annotation_default_field()) {
725 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
726 }
727 return mh();
728 }
731 oop Reflection::new_constructor(methodHandle method, TRAPS) {
732 assert(method()->is_initializer(), "should call new_method instead");
734 instanceKlassHandle holder (THREAD, method->method_holder());
735 int slot = method->method_idnum();
737 symbolHandle signature (THREAD, method->signature());
738 int parameter_count = ArgumentCount(signature).size();
739 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
740 if (parameter_types.is_null()) return NULL;
742 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
743 if (exception_types.is_null()) return NULL;
745 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
747 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
749 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
750 java_lang_reflect_Constructor::set_slot(ch(), slot);
751 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
752 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
753 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
754 java_lang_reflect_Constructor::set_override(ch(), false);
755 if (java_lang_reflect_Constructor::has_signature_field() &&
756 method->generic_signature() != NULL) {
757 symbolHandle gs(THREAD, method->generic_signature());
758 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
759 java_lang_reflect_Constructor::set_signature(ch(), sig());
760 }
761 if (java_lang_reflect_Constructor::has_annotations_field()) {
762 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
763 }
764 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
765 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
766 }
767 return ch();
768 }
771 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
772 symbolHandle field_name(THREAD, fd->name());
773 Handle name;
774 if (intern_name) {
775 // intern_name is only true with UseNewReflection
776 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
777 name = Handle(THREAD, name_oop);
778 } else {
779 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
780 }
781 symbolHandle signature (THREAD, fd->signature());
782 KlassHandle holder (THREAD, fd->field_holder());
783 Handle type = new_type(signature, holder, CHECK_NULL);
784 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
786 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
787 java_lang_reflect_Field::set_slot(rh(), fd->index());
788 java_lang_reflect_Field::set_name(rh(), name());
789 java_lang_reflect_Field::set_type(rh(), type());
790 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
791 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
792 java_lang_reflect_Field::set_override(rh(), false);
793 if (java_lang_reflect_Field::has_signature_field() &&
794 fd->generic_signature() != NULL) {
795 symbolHandle gs(THREAD, fd->generic_signature());
796 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
797 java_lang_reflect_Field::set_signature(rh(), sig());
798 }
799 if (java_lang_reflect_Field::has_annotations_field()) {
800 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
801 }
802 return rh();
803 }
806 //---------------------------------------------------------------------------
807 //
808 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
809 //
810 // See reflection.hpp for details.
811 //
812 //---------------------------------------------------------------------------
814 #ifdef SUPPORT_OLD_REFLECTION
816 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
817 KlassHandle recv_klass, Handle receiver, TRAPS) {
818 assert(!method.is_null() , "method should not be null");
820 CallInfo info;
821 symbolHandle signature (THREAD, method->signature());
822 symbolHandle name (THREAD, method->name());
823 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
824 name, signature,
825 KlassHandle(), false, true,
826 CHECK_(methodHandle()));
827 return info.selected_method();
828 }
831 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
832 Handle receiver, bool override, objArrayHandle ptypes,
833 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
834 ResourceMark rm(THREAD);
836 methodHandle method; // actual method to invoke
837 KlassHandle target_klass; // target klass, receiver's klass for non-static
839 // Ensure klass is initialized
840 klass->initialize(CHECK_NULL);
842 bool is_static = reflected_method->is_static();
843 if (is_static) {
844 // ignore receiver argument
845 method = reflected_method;
846 target_klass = klass;
847 } else {
848 // check for null receiver
849 if (receiver.is_null()) {
850 THROW_0(vmSymbols::java_lang_NullPointerException());
851 }
852 // Check class of receiver against class declaring method
853 if (!receiver->is_a(klass())) {
854 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
855 }
856 // target klass is receiver's klass
857 target_klass = KlassHandle(THREAD, receiver->klass());
858 // no need to resolve if method is private or <init>
859 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
860 method = reflected_method;
861 } else {
862 // resolve based on the receiver
863 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
864 // resolve interface call
865 if (ReflectionWrapResolutionErrors) {
866 // new default: 6531596
867 // Match resolution errors with those thrown due to reflection inlining
868 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
869 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
870 if (HAS_PENDING_EXCEPTION) {
871 // Method resolution threw an exception; wrap it in an InvocationTargetException
872 oop resolution_exception = PENDING_EXCEPTION;
873 CLEAR_PENDING_EXCEPTION;
874 JavaCallArguments args(Handle(THREAD, resolution_exception));
875 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
876 vmSymbolHandles::throwable_void_signature(),
877 &args);
878 }
879 } else {
880 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
881 }
882 } else {
883 // if the method can be overridden, we resolve using the vtable index.
884 int index = reflected_method->vtable_index();
885 method = reflected_method;
886 if (index != methodOopDesc::nonvirtual_vtable_index) {
887 // target_klass might be an arrayKlassOop but all vtables start at
888 // the same place. The cast is to avoid virtual call and assertion.
889 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
890 method = methodHandle(THREAD, inst->method_at_vtable(index));
891 }
892 if (!method.is_null()) {
893 // Check for abstract methods as well
894 if (method->is_abstract()) {
895 // new default: 6531596
896 if (ReflectionWrapResolutionErrors) {
897 ResourceMark rm(THREAD);
898 Handle h_origexception = Exceptions::new_exception(THREAD,
899 vmSymbols::java_lang_AbstractMethodError(),
900 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
901 method->name(),
902 method->signature()));
903 JavaCallArguments args(h_origexception);
904 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
905 vmSymbolHandles::throwable_void_signature(),
906 &args);
907 } else {
908 ResourceMark rm(THREAD);
909 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
910 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
911 method->name(),
912 method->signature()));
913 }
914 }
915 }
916 }
917 }
918 }
920 // I believe this is a ShouldNotGetHere case which requires
921 // an internal vtable bug. If you ever get this please let Karen know.
922 if (method.is_null()) {
923 ResourceMark rm(THREAD);
924 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
925 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
926 reflected_method->name(),
927 reflected_method->signature()));
928 }
930 // In the JDK 1.4 reflection implementation, the security check is
931 // done at the Java level
932 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
934 // Access checking (unless overridden by Method)
935 if (!override) {
936 if (!(klass->is_public() && reflected_method->is_public())) {
937 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
938 if (!access) {
939 return NULL; // exception
940 }
941 }
942 }
944 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
946 assert(ptypes->is_objArray(), "just checking");
947 int args_len = args.is_null() ? 0 : args->length();
948 // Check number of arguments
949 if (ptypes->length() != args_len) {
950 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
951 }
953 // Create object to contain parameters for the JavaCall
954 JavaCallArguments java_args(method->size_of_parameters());
956 if (!is_static) {
957 java_args.push_oop(receiver);
958 }
960 for (int i = 0; i < args_len; i++) {
961 oop type_mirror = ptypes->obj_at(i);
962 oop arg = args->obj_at(i);
963 if (java_lang_Class::is_primitive(type_mirror)) {
964 jvalue value;
965 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
966 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
967 if (ptype != atype) {
968 widen(&value, atype, ptype, CHECK_NULL);
969 }
970 switch (ptype) {
971 case T_BOOLEAN: java_args.push_int(value.z); break;
972 case T_CHAR: java_args.push_int(value.c); break;
973 case T_BYTE: java_args.push_int(value.b); break;
974 case T_SHORT: java_args.push_int(value.s); break;
975 case T_INT: java_args.push_int(value.i); break;
976 case T_LONG: java_args.push_long(value.j); break;
977 case T_FLOAT: java_args.push_float(value.f); break;
978 case T_DOUBLE: java_args.push_double(value.d); break;
979 default:
980 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
981 }
982 } else {
983 if (arg != NULL) {
984 klassOop k = java_lang_Class::as_klassOop(type_mirror);
985 if (!arg->is_a(k)) {
986 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
987 }
988 }
989 Handle arg_handle(THREAD, arg); // Create handle for argument
990 java_args.push_oop(arg_handle); // Push handle
991 }
992 }
994 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
996 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
997 // oop (i.e., NOT as an handle)
998 JavaValue result(rtype);
999 JavaCalls::call(&result, method, &java_args, THREAD);
1001 if (HAS_PENDING_EXCEPTION) {
1002 // Method threw an exception; wrap it in an InvocationTargetException
1003 oop target_exception = PENDING_EXCEPTION;
1004 CLEAR_PENDING_EXCEPTION;
1005 JavaCallArguments args(Handle(THREAD, target_exception));
1006 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
1007 vmSymbolHandles::throwable_void_signature(),
1008 &args);
1009 } else {
1010 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1011 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1012 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1013 }
1014 }
1017 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1018 switch (narrow_type) {
1019 case T_BOOLEAN:
1020 value->z = (jboolean) value->i;
1021 return;
1022 case T_BYTE:
1023 value->b = (jbyte) value->i;
1024 return;
1025 case T_CHAR:
1026 value->c = (jchar) value->i;
1027 return;
1028 case T_SHORT:
1029 value->s = (jshort) value->i;
1030 return;
1031 default:
1032 break; // fail
1033 }
1034 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1035 }
1038 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1039 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1040 return java_lang_Class::primitive_type(basic_type_mirror);
1041 }
1044 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1045 int types_len = types.is_null() ? 0 : types->length();
1046 if (types_len != parameter_count) return false;
1047 if (parameter_count > 0) {
1048 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1049 for (int index = 0; index < parameter_count; index++) {
1050 if (types->obj_at(index) != method_types->obj_at(index)) {
1051 return false;
1052 }
1053 }
1054 }
1055 return true;
1056 }
1059 oop Reflection::new_field(FieldStream* st, TRAPS) {
1060 symbolHandle field_name(THREAD, st->name());
1061 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1062 symbolHandle signature(THREAD, st->signature());
1063 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1064 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1065 oop result = rh();
1067 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1068 java_lang_reflect_Field::set_slot(result, st->index());
1069 java_lang_reflect_Field::set_name(result, name());
1070 java_lang_reflect_Field::set_type(result, type());
1071 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1072 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1073 java_lang_reflect_Field::set_override(result, false);
1074 return result;
1075 }
1078 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1079 if (field_mirror.is_null()) {
1080 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1081 }
1083 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1084 int slot = java_lang_reflect_Field::slot(field_mirror());
1086 // Ensure klass is initialized
1087 klass->initialize(CHECK_false);
1088 fd->initialize(klass(), slot);
1090 bool is_static = fd->is_static();
1091 KlassHandle receiver_klass;
1093 if (is_static) {
1094 receiver = KlassHandle(THREAD, klass());
1095 receiver_klass = klass;
1096 } else {
1097 // Check object is a non-null instance of declaring class
1098 if (receiver.is_null()) {
1099 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1100 }
1101 if (!receiver->is_a(klass())) {
1102 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1103 }
1104 receiver_klass = KlassHandle(THREAD, receiver->klass());
1105 }
1107 // Access checking (unless overridden by Field)
1108 if (!java_lang_reflect_Field::override(field_mirror())) {
1109 if (!(klass->is_public() && fd->is_public())) {
1110 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1111 if (!access_check) {
1112 return false; // exception
1113 }
1114 }
1115 }
1117 if (check_final && fd->is_final()) {
1118 // In 1.3 we always throw an error when attempting to set a final field.
1119 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1120 // We currently maintain backwards compatibility. See bug 4250960.
1121 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1122 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1123 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1124 }
1125 }
1126 return true;
1127 }
1130 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1131 BasicType field_type = fd->field_type();
1132 int offset = fd->offset();
1133 switch (field_type) {
1134 case T_BOOLEAN:
1135 value->z = receiver->bool_field(offset);
1136 break;
1137 case T_CHAR:
1138 value->c = receiver->char_field(offset);
1139 break;
1140 case T_FLOAT:
1141 value->f = receiver->float_field(offset);
1142 break;
1143 case T_DOUBLE:
1144 value->d = receiver->double_field(offset);
1145 break;
1146 case T_BYTE:
1147 value->b = receiver->byte_field(offset);
1148 break;
1149 case T_SHORT:
1150 value->s = receiver->short_field(offset);
1151 break;
1152 case T_INT:
1153 value->i = receiver->int_field(offset);
1154 break;
1155 case T_LONG:
1156 value->j = receiver->long_field(offset);
1157 break;
1158 case T_OBJECT:
1159 case T_ARRAY:
1160 value->l = (jobject) receiver->obj_field(offset);
1161 break;
1162 default:
1163 return T_ILLEGAL;
1164 }
1165 return field_type;
1166 }
1169 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1170 BasicType field_type = fd->field_type();
1171 if (field_type != value_type) {
1172 widen(value, value_type, field_type, CHECK);
1173 }
1175 int offset = fd->offset();
1176 switch (field_type) {
1177 case T_BOOLEAN:
1178 receiver->bool_field_put(offset, value->z);
1179 break;
1180 case T_CHAR:
1181 receiver->char_field_put(offset, value->c);
1182 break;
1183 case T_FLOAT:
1184 receiver->float_field_put(offset, value->f);
1185 break;
1186 case T_DOUBLE:
1187 receiver->double_field_put(offset, value->d);
1188 break;
1189 case T_BYTE:
1190 receiver->byte_field_put(offset, value->b);
1191 break;
1192 case T_SHORT:
1193 receiver->short_field_put(offset, value->s);
1194 break;
1195 case T_INT:
1196 receiver->int_field_put(offset, value->i);
1197 break;
1198 case T_LONG:
1199 receiver->long_field_put(offset, value->j);
1200 break;
1201 case T_OBJECT:
1202 case T_ARRAY: {
1203 Handle obj(THREAD, (oop) value->l);
1204 if (obj.not_null()) {
1205 symbolHandle signature(THREAD, fd->signature());
1206 Handle loader (THREAD, fd->loader());
1207 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1208 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1209 if (!obj->is_a(k)) {
1210 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1211 }
1212 }
1213 receiver->obj_field_put(offset, obj());
1214 break;
1215 }
1216 default:
1217 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1218 }
1219 }
1222 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1223 // Exclude primitive types and array types
1224 if (java_lang_Class::is_primitive(mirror)) return NULL;
1225 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1227 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1228 bool local_fields_only = (which == DECLARED);
1230 // Ensure class is linked
1231 k->link_class(CHECK_NULL);
1233 // Search class and interface fields
1234 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1235 if (st.name() == field_name) {
1236 if (local_fields_only || st.access_flags().is_public()) {
1237 return new_field(&st, THREAD);
1238 }
1239 }
1240 }
1242 return NULL;
1243 }
1246 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1247 // Exclude primitive types and array types
1248 if (java_lang_Class::is_primitive(mirror)
1249 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1250 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1251 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1252 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1253 }
1255 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1257 // Ensure class is linked
1258 k->link_class(CHECK_NULL);
1260 bool local_fields_only = (which == DECLARED);
1261 int count = 0;
1262 { // Compute fields count for class and interface fields
1263 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1264 if (local_fields_only || st.access_flags().is_public()) {
1265 count++;
1266 }
1267 }
1268 }
1270 // Allocate result
1271 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1272 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1273 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1274 objArrayHandle result (THREAD, r);
1276 // Fill in results backwards
1277 {
1278 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1279 if (local_fields_only || st.access_flags().is_public()) {
1280 oop field = new_field(&st, CHECK_NULL);
1281 result->obj_at_put(--count, field);
1282 }
1283 }
1284 assert(count == 0, "just checking");
1285 }
1286 return result();
1287 }
1290 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1291 if (java_lang_Class::is_primitive(mirror)) return NULL;
1292 klassOop klass = java_lang_Class::as_klassOop(mirror);
1293 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1295 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1296 klass = SystemDictionary::object_klass();
1297 }
1298 instanceKlassHandle h_k(THREAD, klass);
1300 // Ensure klass is linked (need not be initialized)
1301 h_k->link_class(CHECK_NULL);
1303 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1304 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1306 switch (which) {
1307 case MEMBER_PUBLIC:
1308 // First the public non-static methods (works if method holder is an interface)
1309 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1310 {
1311 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1312 methodHandle m(THREAD, st.method());
1313 // For interfaces include static initializers since classic does that!
1314 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1315 symbolHandle signature(THREAD, m->signature());
1316 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1317 if (parameter_match) {
1318 return new_method(m, false, false, THREAD);
1319 }
1320 }
1321 }
1322 }
1323 // Then the public static methods (works if method holder is an interface)
1324 {
1325 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1326 methodHandle m(THREAD, st.method());
1327 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1328 symbolHandle signature(THREAD, m->signature());
1329 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1330 if (parameter_match) {
1331 return new_method(m, false, false, THREAD);
1332 }
1333 }
1334 }
1335 }
1336 break;
1337 case MEMBER_DECLARED:
1338 // All local methods
1339 {
1340 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1341 methodHandle m(THREAD, st.method());
1342 if (method_name() == m->name() && !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 default:
1353 break;
1354 }
1355 return NULL;
1356 }
1359 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1360 // Exclude primitive types
1361 if (java_lang_Class::is_primitive(mirror) ||
1362 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1363 klassOop klass = SystemDictionary::reflect_method_klass();
1364 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1365 }
1367 klassOop klass = java_lang_Class::as_klassOop(mirror);
1368 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1369 klass = SystemDictionary::object_klass();
1370 }
1371 instanceKlassHandle h_k(THREAD, klass);
1373 // Ensure klass is linked (need not be initialized)
1374 h_k->link_class(CHECK_NULL);
1376 // We search the (super)interfaces only if h_k is an interface itself
1377 bool is_interface = h_k->is_interface();
1379 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1380 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1382 switch (which) {
1383 case MEMBER_PUBLIC:
1384 {
1386 // Count public methods (non-static and static)
1387 int count = 0;
1388 {
1389 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1390 methodOop m = st.method();
1391 // For interfaces include static initializers since classic does that!
1392 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1393 count++;
1394 }
1395 }
1396 }
1398 // Allocate result
1399 klassOop klass = SystemDictionary::reflect_method_klass();
1400 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1401 objArrayHandle h_result (THREAD, r);
1403 // Fill in results backwards
1404 {
1405 // First the non-static public methods
1406 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1407 methodHandle m (THREAD, st.method());
1408 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1409 oop method = new_method(m, false, false, CHECK_NULL);
1410 if (method == NULL) {
1411 return NULL;
1412 } else {
1413 h_result->obj_at_put(--count, method);
1414 }
1415 }
1416 }
1417 }
1418 {
1419 // Then the static public methods
1420 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1421 methodHandle m (THREAD, st.method());
1422 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1423 oop method = new_method(m, false, false, CHECK_NULL);
1424 if (method == NULL) {
1425 return NULL;
1426 } else {
1427 h_result->obj_at_put(--count, method);
1428 }
1429 }
1430 }
1431 }
1433 assert(count == 0, "just checking");
1434 return h_result();
1435 }
1437 case MEMBER_DECLARED:
1438 {
1439 // Count all methods
1440 int count = 0;
1441 {
1442 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1443 methodOop m = st.method();
1444 if (!m->is_initializer()) {
1445 count++;
1446 }
1447 }
1448 }
1449 // Allocate result
1450 klassOop klass = SystemDictionary::reflect_method_klass();
1451 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1452 objArrayHandle h_result (THREAD, r);
1454 // Fill in results backwards
1455 {
1456 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1457 methodHandle m (THREAD, st.method());
1458 if (!m->is_initializer()) {
1459 oop method = new_method(m, false, false, CHECK_NULL);
1460 if (method == NULL) {
1461 return NULL;
1462 } else {
1463 h_result->obj_at_put(--count, method);
1464 }
1465 }
1466 }
1467 }
1468 assert(count == 0, "just checking");
1469 return h_result();
1470 }
1471 }
1472 ShouldNotReachHere();
1473 return NULL;
1474 }
1477 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1479 // Exclude primitive, interface and array types
1480 bool prim = java_lang_Class::is_primitive(mirror);
1481 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1482 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1484 // Must be instance klass
1485 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1487 // Ensure klass is linked (need not be initialized)
1488 h_k->link_class(CHECK_NULL);
1490 bool local_only = (which == MEMBER_DECLARED);
1491 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1492 methodHandle m(THREAD, st.method());
1493 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1494 symbolHandle signature(THREAD, m->signature());
1495 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1496 if (parameter_match) {
1497 return new_constructor(m, THREAD);
1498 }
1499 }
1500 }
1502 return NULL;
1503 }
1506 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1507 // Exclude primitive, interface and array types
1508 bool prim = java_lang_Class::is_primitive(mirror);
1509 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1510 if (prim || k->is_interface() || k->oop_is_array()) {
1511 return oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0, CHECK_NULL); // Return empty array
1512 }
1514 // Must be instanceKlass at this point
1515 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1517 // Ensure klass is linked (need not be initialized)
1518 h_k->link_class(CHECK_NULL);
1520 bool local_only = (which == MEMBER_DECLARED);
1521 int count = 0;
1522 {
1523 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1524 methodOop m = st.method();
1525 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1526 count++;
1527 }
1528 }
1529 }
1531 // Allocate result
1532 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1533 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1534 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1535 objArrayHandle h_result (THREAD, r);
1537 // Fill in results backwards
1538 {
1539 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1540 methodHandle m (THREAD, st.method());
1541 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1542 oop constr = new_constructor(m, CHECK_NULL);
1543 if (constr == NULL) {
1544 return NULL;
1545 } else {
1546 h_result->obj_at_put(--count, constr);
1547 }
1548 }
1549 }
1550 assert(count == 0, "just checking");
1551 }
1552 return h_result();
1553 }
1556 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1557 // of java.lang.reflect.Constructor
1559 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1560 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1561 int slot = java_lang_reflect_Method::slot(method_mirror);
1562 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1563 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1565 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1566 BasicType rtype;
1567 if (java_lang_Class::is_primitive(return_type_mirror)) {
1568 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1569 } else {
1570 rtype = T_OBJECT;
1571 }
1573 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1574 methodOop m = klass->method_with_idnum(slot);
1575 if (m == NULL) {
1576 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1577 }
1578 methodHandle method(THREAD, m);
1580 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1581 }
1584 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1585 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1586 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1587 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1588 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1590 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1591 methodOop m = klass->method_with_idnum(slot);
1592 if (m == NULL) {
1593 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1594 }
1595 methodHandle method(THREAD, m);
1596 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1598 // Make sure klass gets initialize
1599 klass->initialize(CHECK_NULL);
1601 // Create new instance (the receiver)
1602 klass->check_valid_for_instantiation(false, CHECK_NULL);
1603 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1605 // Ignore result from call and return receiver
1606 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1607 return receiver();
1608 }
1611 #endif /* SUPPORT_OLD_REFLECTION */
