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src/share/vm/runtime/reflection.cpp@0715f0cf171d
src/share/vm/runtime/reflection.cpp
Fri, 08 Oct 2010 09:29:09 -0700
- author
- jcoomes
- date
- Fri, 08 Oct 2010 09:29:09 -0700
- changeset 2198
- 0715f0cf171d
- parent 1907
- c18cbe5936b8
- child 2314
- f95d63e2154a
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * 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_MagicAccessorImpl_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 // Adapter frames can access anything.
486 if (MethodHandleCompiler::klass_is_method_handle_adapter_holder(accessor))
487 // This is an internal adapter frame from the MethodHandleCompiler.
488 return true;
490 if (RelaxAccessControlCheck ||
491 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
492 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
493 return classloader_only &&
494 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
495 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
496 accessor_ik->class_loader() == accessee_ik->class_loader();
497 } else {
498 return false;
499 }
500 }
502 bool Reflection::verify_field_access(klassOop current_class,
503 klassOop resolved_class,
504 klassOop field_class,
505 AccessFlags access,
506 bool classloader_only,
507 bool protected_restriction) {
508 // Verify that current_class can access a field of field_class, where that
509 // field's access bits are "access". We assume that we've already verified
510 // that current_class can access field_class.
511 //
512 // If the classloader_only flag is set, we automatically allow any accesses
513 // in which current_class doesn't have a classloader.
514 //
515 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
516 // need this distinction (e.g. if all we have is the runtime type, or during
517 // class file parsing when we only care about the static type); in that case
518 // callers should ensure that resolved_class == field_class.
519 //
520 if ((current_class == NULL) ||
521 (current_class == field_class) ||
522 access.is_public()) {
523 return true;
524 }
526 if (access.is_protected()) {
527 if (!protected_restriction) {
528 // See if current_class is a subclass of field_class
529 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
530 if (access.is_static() || // static fields are ok, see 6622385
531 current_class == resolved_class ||
532 field_class == resolved_class ||
533 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
534 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
535 return true;
536 }
537 }
538 }
539 }
541 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
542 return true;
543 }
545 // New (1.4) reflection implementation. Allow all accesses from
546 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
547 if ( JDK_Version::is_gte_jdk14x_version()
548 && UseNewReflection
549 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
550 return true;
551 }
553 return can_relax_access_check_for(
554 current_class, field_class, classloader_only);
555 }
558 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
559 return instanceKlass::cast(class1)->is_same_class_package(class2);
560 }
562 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) {
563 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
564 }
567 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
568 // throw an incompatible class change exception
569 // If inner_is_member, require the inner to be a member of the outer.
570 // If !inner_is_member, require the inner to be anonymous (a non-member).
571 // Caller is responsible for figuring out in advance which case must be true.
572 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
573 bool inner_is_member, TRAPS) {
574 const int inner_class_info_index = 0;
575 const int outer_class_info_index = 1;
577 typeArrayHandle icls (THREAD, outer->inner_classes());
578 constantPoolHandle cp (THREAD, outer->constants());
579 for(int i = 0; i < icls->length(); i += 4) {
580 int ioff = icls->ushort_at(i + inner_class_info_index);
581 int ooff = icls->ushort_at(i + outer_class_info_index);
583 if (inner_is_member && ioff != 0 && ooff != 0) {
584 klassOop o = cp->klass_at(ooff, CHECK);
585 if (o == outer()) {
586 klassOop i = cp->klass_at(ioff, CHECK);
587 if (i == inner()) {
588 return;
589 }
590 }
591 }
592 if (!inner_is_member && ioff != 0 && ooff == 0 &&
593 cp->klass_name_at_matches(inner, ioff)) {
594 klassOop i = cp->klass_at(ioff, CHECK);
595 if (i == inner()) {
596 return;
597 }
598 }
599 }
601 // 'inner' not declared as an inner klass in outer
602 ResourceMark rm(THREAD);
603 Exceptions::fthrow(
604 THREAD_AND_LOCATION,
605 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
606 "%s and %s disagree on InnerClasses attribute",
607 outer->external_name(),
608 inner->external_name()
609 );
610 }
612 // Utility method converting a single SignatureStream element into java.lang.Class instance
614 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
615 switch (ss->type()) {
616 default:
617 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
618 return java_lang_Class::primitive_mirror(ss->type());
619 case T_OBJECT:
620 case T_ARRAY:
621 symbolOop name = ss->as_symbol(CHECK_NULL);
622 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
623 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
624 klassOop k = SystemDictionary::resolve_or_fail(
625 symbolHandle(THREAD, name),
626 Handle(THREAD, loader),
627 Handle(THREAD, protection_domain),
628 true, CHECK_NULL);
629 if (TraceClassResolution) {
630 trace_class_resolution(k);
631 }
632 return k->klass_part()->java_mirror();
633 };
634 }
637 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
638 // Allocate array holding parameter types (java.lang.Class instances)
639 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
640 objArrayHandle mirrors (THREAD, m);
641 int index = 0;
642 // Collect parameter types
643 symbolHandle signature (THREAD, method->signature());
644 SignatureStream ss(signature);
645 while (!ss.at_return_type()) {
646 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
647 mirrors->obj_at_put(index++, mirror);
648 ss.next();
649 }
650 assert(index == parameter_count, "invalid parameter count");
651 if (return_type != NULL) {
652 // Collect return type as well
653 assert(ss.at_return_type(), "return type should be present");
654 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
655 }
656 return mirrors;
657 }
659 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
660 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
661 }
664 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
665 // Basic types
666 BasicType type = vmSymbols::signature_type(signature());
667 if (type != T_OBJECT) {
668 return Handle(THREAD, Universe::java_mirror(type));
669 }
671 oop loader = instanceKlass::cast(k())->class_loader();
672 oop protection_domain = Klass::cast(k())->protection_domain();
673 klassOop result = SystemDictionary::resolve_or_fail(signature,
674 Handle(THREAD, loader),
675 Handle(THREAD, protection_domain),
676 true, CHECK_(Handle()));
678 if (TraceClassResolution) {
679 trace_class_resolution(result);
680 }
682 oop nt = Klass::cast(result)->java_mirror();
683 return Handle(THREAD, nt);
684 }
687 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
688 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
689 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
690 assert(!method()->is_initializer() ||
691 (for_constant_pool_access && method()->is_static()) ||
692 (method()->name() == vmSymbols::class_initializer_name()
693 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
694 instanceKlassHandle holder (THREAD, method->method_holder());
695 int slot = method->method_idnum();
697 symbolHandle signature (THREAD, method->signature());
698 int parameter_count = ArgumentCount(signature).size();
699 oop return_type_oop = NULL;
700 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
701 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
703 Handle return_type(THREAD, return_type_oop);
705 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
707 if (exception_types.is_null()) return NULL;
709 symbolHandle method_name(THREAD, method->name());
710 Handle name;
711 if (intern_name) {
712 // intern_name is only true with UseNewReflection
713 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
714 name = Handle(THREAD, name_oop);
715 } else {
716 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
717 }
718 if (name.is_null()) return NULL;
720 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
722 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
724 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
725 java_lang_reflect_Method::set_slot(mh(), slot);
726 java_lang_reflect_Method::set_name(mh(), name());
727 java_lang_reflect_Method::set_return_type(mh(), return_type());
728 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
729 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
730 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
731 java_lang_reflect_Method::set_override(mh(), false);
732 if (java_lang_reflect_Method::has_signature_field() &&
733 method->generic_signature() != NULL) {
734 symbolHandle gs(THREAD, method->generic_signature());
735 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
736 java_lang_reflect_Method::set_signature(mh(), sig());
737 }
738 if (java_lang_reflect_Method::has_annotations_field()) {
739 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
740 }
741 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
742 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
743 }
744 if (java_lang_reflect_Method::has_annotation_default_field()) {
745 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
746 }
747 return mh();
748 }
751 oop Reflection::new_constructor(methodHandle method, TRAPS) {
752 assert(method()->is_initializer(), "should call new_method instead");
754 instanceKlassHandle holder (THREAD, method->method_holder());
755 int slot = method->method_idnum();
757 symbolHandle signature (THREAD, method->signature());
758 int parameter_count = ArgumentCount(signature).size();
759 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
760 if (parameter_types.is_null()) return NULL;
762 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
763 if (exception_types.is_null()) return NULL;
765 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
767 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
769 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
770 java_lang_reflect_Constructor::set_slot(ch(), slot);
771 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
772 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
773 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
774 java_lang_reflect_Constructor::set_override(ch(), false);
775 if (java_lang_reflect_Constructor::has_signature_field() &&
776 method->generic_signature() != NULL) {
777 symbolHandle gs(THREAD, method->generic_signature());
778 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
779 java_lang_reflect_Constructor::set_signature(ch(), sig());
780 }
781 if (java_lang_reflect_Constructor::has_annotations_field()) {
782 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
783 }
784 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
785 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
786 }
787 return ch();
788 }
791 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
792 symbolHandle field_name(THREAD, fd->name());
793 Handle name;
794 if (intern_name) {
795 // intern_name is only true with UseNewReflection
796 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
797 name = Handle(THREAD, name_oop);
798 } else {
799 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
800 }
801 symbolHandle signature (THREAD, fd->signature());
802 KlassHandle holder (THREAD, fd->field_holder());
803 Handle type = new_type(signature, holder, CHECK_NULL);
804 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
806 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
807 java_lang_reflect_Field::set_slot(rh(), fd->index());
808 java_lang_reflect_Field::set_name(rh(), name());
809 java_lang_reflect_Field::set_type(rh(), type());
810 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
811 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
812 java_lang_reflect_Field::set_override(rh(), false);
813 if (java_lang_reflect_Field::has_signature_field() &&
814 fd->generic_signature() != NULL) {
815 symbolHandle gs(THREAD, fd->generic_signature());
816 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
817 java_lang_reflect_Field::set_signature(rh(), sig());
818 }
819 if (java_lang_reflect_Field::has_annotations_field()) {
820 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
821 }
822 return rh();
823 }
826 //---------------------------------------------------------------------------
827 //
828 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
829 //
830 // See reflection.hpp for details.
831 //
832 //---------------------------------------------------------------------------
834 #ifdef SUPPORT_OLD_REFLECTION
836 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
837 KlassHandle recv_klass, Handle receiver, TRAPS) {
838 assert(!method.is_null() , "method should not be null");
840 CallInfo info;
841 symbolHandle signature (THREAD, method->signature());
842 symbolHandle name (THREAD, method->name());
843 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
844 name, signature,
845 KlassHandle(), false, true,
846 CHECK_(methodHandle()));
847 return info.selected_method();
848 }
851 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
852 Handle receiver, bool override, objArrayHandle ptypes,
853 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
854 ResourceMark rm(THREAD);
856 methodHandle method; // actual method to invoke
857 KlassHandle target_klass; // target klass, receiver's klass for non-static
859 // Ensure klass is initialized
860 klass->initialize(CHECK_NULL);
862 bool is_static = reflected_method->is_static();
863 if (is_static) {
864 // ignore receiver argument
865 method = reflected_method;
866 target_klass = klass;
867 } else {
868 // check for null receiver
869 if (receiver.is_null()) {
870 THROW_0(vmSymbols::java_lang_NullPointerException());
871 }
872 // Check class of receiver against class declaring method
873 if (!receiver->is_a(klass())) {
874 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
875 }
876 // target klass is receiver's klass
877 target_klass = KlassHandle(THREAD, receiver->klass());
878 // no need to resolve if method is private or <init>
879 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
880 method = reflected_method;
881 } else {
882 // resolve based on the receiver
883 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
884 // resolve interface call
885 if (ReflectionWrapResolutionErrors) {
886 // new default: 6531596
887 // Match resolution errors with those thrown due to reflection inlining
888 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
889 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
890 if (HAS_PENDING_EXCEPTION) {
891 // Method resolution threw an exception; wrap it in an InvocationTargetException
892 oop resolution_exception = PENDING_EXCEPTION;
893 CLEAR_PENDING_EXCEPTION;
894 JavaCallArguments args(Handle(THREAD, resolution_exception));
895 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
896 vmSymbolHandles::throwable_void_signature(),
897 &args);
898 }
899 } else {
900 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
901 }
902 } else {
903 // if the method can be overridden, we resolve using the vtable index.
904 int index = reflected_method->vtable_index();
905 method = reflected_method;
906 if (index != methodOopDesc::nonvirtual_vtable_index) {
907 // target_klass might be an arrayKlassOop but all vtables start at
908 // the same place. The cast is to avoid virtual call and assertion.
909 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
910 method = methodHandle(THREAD, inst->method_at_vtable(index));
911 }
912 if (!method.is_null()) {
913 // Check for abstract methods as well
914 if (method->is_abstract()) {
915 // new default: 6531596
916 if (ReflectionWrapResolutionErrors) {
917 ResourceMark rm(THREAD);
918 Handle h_origexception = Exceptions::new_exception(THREAD,
919 vmSymbols::java_lang_AbstractMethodError(),
920 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
921 method->name(),
922 method->signature()));
923 JavaCallArguments args(h_origexception);
924 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
925 vmSymbolHandles::throwable_void_signature(),
926 &args);
927 } else {
928 ResourceMark rm(THREAD);
929 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
930 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
931 method->name(),
932 method->signature()));
933 }
934 }
935 }
936 }
937 }
938 }
940 // I believe this is a ShouldNotGetHere case which requires
941 // an internal vtable bug. If you ever get this please let Karen know.
942 if (method.is_null()) {
943 ResourceMark rm(THREAD);
944 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
945 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
946 reflected_method->name(),
947 reflected_method->signature()));
948 }
950 // In the JDK 1.4 reflection implementation, the security check is
951 // done at the Java level
952 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
954 // Access checking (unless overridden by Method)
955 if (!override) {
956 if (!(klass->is_public() && reflected_method->is_public())) {
957 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
958 if (!access) {
959 return NULL; // exception
960 }
961 }
962 }
964 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
966 assert(ptypes->is_objArray(), "just checking");
967 int args_len = args.is_null() ? 0 : args->length();
968 // Check number of arguments
969 if (ptypes->length() != args_len) {
970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
971 }
973 // Create object to contain parameters for the JavaCall
974 JavaCallArguments java_args(method->size_of_parameters());
976 if (!is_static) {
977 java_args.push_oop(receiver);
978 }
980 for (int i = 0; i < args_len; i++) {
981 oop type_mirror = ptypes->obj_at(i);
982 oop arg = args->obj_at(i);
983 if (java_lang_Class::is_primitive(type_mirror)) {
984 jvalue value;
985 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
986 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
987 if (ptype != atype) {
988 widen(&value, atype, ptype, CHECK_NULL);
989 }
990 switch (ptype) {
991 case T_BOOLEAN: java_args.push_int(value.z); break;
992 case T_CHAR: java_args.push_int(value.c); break;
993 case T_BYTE: java_args.push_int(value.b); break;
994 case T_SHORT: java_args.push_int(value.s); break;
995 case T_INT: java_args.push_int(value.i); break;
996 case T_LONG: java_args.push_long(value.j); break;
997 case T_FLOAT: java_args.push_float(value.f); break;
998 case T_DOUBLE: java_args.push_double(value.d); break;
999 default:
1000 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1001 }
1002 } else {
1003 if (arg != NULL) {
1004 klassOop k = java_lang_Class::as_klassOop(type_mirror);
1005 if (!arg->is_a(k)) {
1006 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1007 }
1008 }
1009 Handle arg_handle(THREAD, arg); // Create handle for argument
1010 java_args.push_oop(arg_handle); // Push handle
1011 }
1012 }
1014 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1016 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1017 // oop (i.e., NOT as an handle)
1018 JavaValue result(rtype);
1019 JavaCalls::call(&result, method, &java_args, THREAD);
1021 if (HAS_PENDING_EXCEPTION) {
1022 // Method threw an exception; wrap it in an InvocationTargetException
1023 oop target_exception = PENDING_EXCEPTION;
1024 CLEAR_PENDING_EXCEPTION;
1025 JavaCallArguments args(Handle(THREAD, target_exception));
1026 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
1027 vmSymbolHandles::throwable_void_signature(),
1028 &args);
1029 } else {
1030 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1031 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1032 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1033 }
1034 }
1037 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1038 switch (narrow_type) {
1039 case T_BOOLEAN:
1040 value->z = (jboolean) value->i;
1041 return;
1042 case T_BYTE:
1043 value->b = (jbyte) value->i;
1044 return;
1045 case T_CHAR:
1046 value->c = (jchar) value->i;
1047 return;
1048 case T_SHORT:
1049 value->s = (jshort) value->i;
1050 return;
1051 default:
1052 break; // fail
1053 }
1054 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1055 }
1058 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1059 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1060 return java_lang_Class::primitive_type(basic_type_mirror);
1061 }
1064 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1065 int types_len = types.is_null() ? 0 : types->length();
1066 if (types_len != parameter_count) return false;
1067 if (parameter_count > 0) {
1068 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1069 for (int index = 0; index < parameter_count; index++) {
1070 if (types->obj_at(index) != method_types->obj_at(index)) {
1071 return false;
1072 }
1073 }
1074 }
1075 return true;
1076 }
1079 oop Reflection::new_field(FieldStream* st, TRAPS) {
1080 symbolHandle field_name(THREAD, st->name());
1081 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1082 symbolHandle signature(THREAD, st->signature());
1083 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1084 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1085 oop result = rh();
1087 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1088 java_lang_reflect_Field::set_slot(result, st->index());
1089 java_lang_reflect_Field::set_name(result, name());
1090 java_lang_reflect_Field::set_type(result, type());
1091 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1092 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1093 java_lang_reflect_Field::set_override(result, false);
1094 return result;
1095 }
1098 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1099 if (field_mirror.is_null()) {
1100 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1101 }
1103 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1104 int slot = java_lang_reflect_Field::slot(field_mirror());
1106 // Ensure klass is initialized
1107 klass->initialize(CHECK_false);
1108 fd->initialize(klass(), slot);
1110 bool is_static = fd->is_static();
1111 KlassHandle receiver_klass;
1113 if (is_static) {
1114 receiver = KlassHandle(THREAD, klass());
1115 receiver_klass = klass;
1116 } else {
1117 // Check object is a non-null instance of declaring class
1118 if (receiver.is_null()) {
1119 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1120 }
1121 if (!receiver->is_a(klass())) {
1122 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1123 }
1124 receiver_klass = KlassHandle(THREAD, receiver->klass());
1125 }
1127 // Access checking (unless overridden by Field)
1128 if (!java_lang_reflect_Field::override(field_mirror())) {
1129 if (!(klass->is_public() && fd->is_public())) {
1130 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1131 if (!access_check) {
1132 return false; // exception
1133 }
1134 }
1135 }
1137 if (check_final && fd->is_final()) {
1138 // In 1.3 we always throw an error when attempting to set a final field.
1139 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1140 // We currently maintain backwards compatibility. See bug 4250960.
1141 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1142 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1143 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1144 }
1145 }
1146 return true;
1147 }
1150 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1151 BasicType field_type = fd->field_type();
1152 int offset = fd->offset();
1153 switch (field_type) {
1154 case T_BOOLEAN:
1155 value->z = receiver->bool_field(offset);
1156 break;
1157 case T_CHAR:
1158 value->c = receiver->char_field(offset);
1159 break;
1160 case T_FLOAT:
1161 value->f = receiver->float_field(offset);
1162 break;
1163 case T_DOUBLE:
1164 value->d = receiver->double_field(offset);
1165 break;
1166 case T_BYTE:
1167 value->b = receiver->byte_field(offset);
1168 break;
1169 case T_SHORT:
1170 value->s = receiver->short_field(offset);
1171 break;
1172 case T_INT:
1173 value->i = receiver->int_field(offset);
1174 break;
1175 case T_LONG:
1176 value->j = receiver->long_field(offset);
1177 break;
1178 case T_OBJECT:
1179 case T_ARRAY:
1180 value->l = (jobject) receiver->obj_field(offset);
1181 break;
1182 default:
1183 return T_ILLEGAL;
1184 }
1185 return field_type;
1186 }
1189 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1190 BasicType field_type = fd->field_type();
1191 if (field_type != value_type) {
1192 widen(value, value_type, field_type, CHECK);
1193 }
1195 int offset = fd->offset();
1196 switch (field_type) {
1197 case T_BOOLEAN:
1198 receiver->bool_field_put(offset, value->z);
1199 break;
1200 case T_CHAR:
1201 receiver->char_field_put(offset, value->c);
1202 break;
1203 case T_FLOAT:
1204 receiver->float_field_put(offset, value->f);
1205 break;
1206 case T_DOUBLE:
1207 receiver->double_field_put(offset, value->d);
1208 break;
1209 case T_BYTE:
1210 receiver->byte_field_put(offset, value->b);
1211 break;
1212 case T_SHORT:
1213 receiver->short_field_put(offset, value->s);
1214 break;
1215 case T_INT:
1216 receiver->int_field_put(offset, value->i);
1217 break;
1218 case T_LONG:
1219 receiver->long_field_put(offset, value->j);
1220 break;
1221 case T_OBJECT:
1222 case T_ARRAY: {
1223 Handle obj(THREAD, (oop) value->l);
1224 if (obj.not_null()) {
1225 symbolHandle signature(THREAD, fd->signature());
1226 Handle loader (THREAD, fd->loader());
1227 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1228 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1229 if (!obj->is_a(k)) {
1230 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1231 }
1232 }
1233 receiver->obj_field_put(offset, obj());
1234 break;
1235 }
1236 default:
1237 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1238 }
1239 }
1242 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1243 // Exclude primitive types and array types
1244 if (java_lang_Class::is_primitive(mirror)) return NULL;
1245 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1247 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1248 bool local_fields_only = (which == DECLARED);
1250 // Ensure class is linked
1251 k->link_class(CHECK_NULL);
1253 // Search class and interface fields
1254 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1255 if (st.name() == field_name) {
1256 if (local_fields_only || st.access_flags().is_public()) {
1257 return new_field(&st, THREAD);
1258 }
1259 }
1260 }
1262 return NULL;
1263 }
1266 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1267 // Exclude primitive types and array types
1268 if (java_lang_Class::is_primitive(mirror)
1269 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1270 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1271 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1272 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1273 }
1275 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1277 // Ensure class is linked
1278 k->link_class(CHECK_NULL);
1280 bool local_fields_only = (which == DECLARED);
1281 int count = 0;
1282 { // Compute fields count for class and interface fields
1283 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1284 if (local_fields_only || st.access_flags().is_public()) {
1285 count++;
1286 }
1287 }
1288 }
1290 // Allocate result
1291 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1292 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1293 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1294 objArrayHandle result (THREAD, r);
1296 // Fill in results backwards
1297 {
1298 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1299 if (local_fields_only || st.access_flags().is_public()) {
1300 oop field = new_field(&st, CHECK_NULL);
1301 result->obj_at_put(--count, field);
1302 }
1303 }
1304 assert(count == 0, "just checking");
1305 }
1306 return result();
1307 }
1310 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1311 if (java_lang_Class::is_primitive(mirror)) return NULL;
1312 klassOop klass = java_lang_Class::as_klassOop(mirror);
1313 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1315 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1316 klass = SystemDictionary::Object_klass();
1317 }
1318 instanceKlassHandle h_k(THREAD, klass);
1320 // Ensure klass is linked (need not be initialized)
1321 h_k->link_class(CHECK_NULL);
1323 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1324 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1326 switch (which) {
1327 case MEMBER_PUBLIC:
1328 // First the public non-static methods (works if method holder is an interface)
1329 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1330 {
1331 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1332 methodHandle m(THREAD, st.method());
1333 // For interfaces include static initializers since classic does that!
1334 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1335 symbolHandle signature(THREAD, m->signature());
1336 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1337 if (parameter_match) {
1338 return new_method(m, false, false, THREAD);
1339 }
1340 }
1341 }
1342 }
1343 // Then the public static methods (works if method holder is an interface)
1344 {
1345 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1346 methodHandle m(THREAD, st.method());
1347 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1348 symbolHandle signature(THREAD, m->signature());
1349 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1350 if (parameter_match) {
1351 return new_method(m, false, false, THREAD);
1352 }
1353 }
1354 }
1355 }
1356 break;
1357 case MEMBER_DECLARED:
1358 // All local methods
1359 {
1360 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1361 methodHandle m(THREAD, st.method());
1362 if (method_name() == m->name() && !m->is_initializer()) {
1363 symbolHandle signature(THREAD, m->signature());
1364 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1365 if (parameter_match) {
1366 return new_method(m, false, false, THREAD);
1367 }
1368 }
1369 }
1370 }
1371 break;
1372 default:
1373 break;
1374 }
1375 return NULL;
1376 }
1379 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1380 // Exclude primitive types
1381 if (java_lang_Class::is_primitive(mirror) ||
1382 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1383 klassOop klass = SystemDictionary::reflect_Method_klass();
1384 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1385 }
1387 klassOop klass = java_lang_Class::as_klassOop(mirror);
1388 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1389 klass = SystemDictionary::Object_klass();
1390 }
1391 instanceKlassHandle h_k(THREAD, klass);
1393 // Ensure klass is linked (need not be initialized)
1394 h_k->link_class(CHECK_NULL);
1396 // We search the (super)interfaces only if h_k is an interface itself
1397 bool is_interface = h_k->is_interface();
1399 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1400 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1402 switch (which) {
1403 case MEMBER_PUBLIC:
1404 {
1406 // Count public methods (non-static and static)
1407 int count = 0;
1408 {
1409 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1410 methodOop m = st.method();
1411 // For interfaces include static initializers since classic does that!
1412 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1413 count++;
1414 }
1415 }
1416 }
1418 // Allocate result
1419 klassOop klass = SystemDictionary::reflect_Method_klass();
1420 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1421 objArrayHandle h_result (THREAD, r);
1423 // Fill in results backwards
1424 {
1425 // First the non-static public methods
1426 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1427 methodHandle m (THREAD, st.method());
1428 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1429 oop method = new_method(m, false, false, CHECK_NULL);
1430 if (method == NULL) {
1431 return NULL;
1432 } else {
1433 h_result->obj_at_put(--count, method);
1434 }
1435 }
1436 }
1437 }
1438 {
1439 // Then the static public methods
1440 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1441 methodHandle m (THREAD, st.method());
1442 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1443 oop method = new_method(m, false, false, CHECK_NULL);
1444 if (method == NULL) {
1445 return NULL;
1446 } else {
1447 h_result->obj_at_put(--count, method);
1448 }
1449 }
1450 }
1451 }
1453 assert(count == 0, "just checking");
1454 return h_result();
1455 }
1457 case MEMBER_DECLARED:
1458 {
1459 // Count all methods
1460 int count = 0;
1461 {
1462 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1463 methodOop m = st.method();
1464 if (!m->is_initializer()) {
1465 count++;
1466 }
1467 }
1468 }
1469 // Allocate result
1470 klassOop klass = SystemDictionary::reflect_Method_klass();
1471 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1472 objArrayHandle h_result (THREAD, r);
1474 // Fill in results backwards
1475 {
1476 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1477 methodHandle m (THREAD, st.method());
1478 if (!m->is_initializer()) {
1479 oop method = new_method(m, false, false, CHECK_NULL);
1480 if (method == NULL) {
1481 return NULL;
1482 } else {
1483 h_result->obj_at_put(--count, method);
1484 }
1485 }
1486 }
1487 }
1488 assert(count == 0, "just checking");
1489 return h_result();
1490 }
1491 }
1492 ShouldNotReachHere();
1493 return NULL;
1494 }
1497 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1499 // Exclude primitive, interface and array types
1500 bool prim = java_lang_Class::is_primitive(mirror);
1501 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1502 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1504 // Must be instance klass
1505 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1507 // Ensure klass is linked (need not be initialized)
1508 h_k->link_class(CHECK_NULL);
1510 bool local_only = (which == MEMBER_DECLARED);
1511 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1512 methodHandle m(THREAD, st.method());
1513 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1514 symbolHandle signature(THREAD, m->signature());
1515 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1516 if (parameter_match) {
1517 return new_constructor(m, THREAD);
1518 }
1519 }
1520 }
1522 return NULL;
1523 }
1526 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1527 // Exclude primitive, interface and array types
1528 bool prim = java_lang_Class::is_primitive(mirror);
1529 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1530 if (prim || k->is_interface() || k->oop_is_array()) {
1531 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array
1532 }
1534 // Must be instanceKlass at this point
1535 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1537 // Ensure klass is linked (need not be initialized)
1538 h_k->link_class(CHECK_NULL);
1540 bool local_only = (which == MEMBER_DECLARED);
1541 int count = 0;
1542 {
1543 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1544 methodOop m = st.method();
1545 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1546 count++;
1547 }
1548 }
1549 }
1551 // Allocate result
1552 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1553 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1554 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1555 objArrayHandle h_result (THREAD, r);
1557 // Fill in results backwards
1558 {
1559 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1560 methodHandle m (THREAD, st.method());
1561 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1562 oop constr = new_constructor(m, CHECK_NULL);
1563 if (constr == NULL) {
1564 return NULL;
1565 } else {
1566 h_result->obj_at_put(--count, constr);
1567 }
1568 }
1569 }
1570 assert(count == 0, "just checking");
1571 }
1572 return h_result();
1573 }
1576 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1577 // of java.lang.reflect.Constructor
1579 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1580 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1581 int slot = java_lang_reflect_Method::slot(method_mirror);
1582 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1583 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1585 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1586 BasicType rtype;
1587 if (java_lang_Class::is_primitive(return_type_mirror)) {
1588 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1589 } else {
1590 rtype = T_OBJECT;
1591 }
1593 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1594 methodOop m = klass->method_with_idnum(slot);
1595 if (m == NULL) {
1596 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1597 }
1598 methodHandle method(THREAD, m);
1600 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1601 }
1604 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1605 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1606 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1607 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1608 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1610 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1611 methodOop m = klass->method_with_idnum(slot);
1612 if (m == NULL) {
1613 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1614 }
1615 methodHandle method(THREAD, m);
1616 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1618 // Make sure klass gets initialize
1619 klass->initialize(CHECK_NULL);
1621 // Create new instance (the receiver)
1622 klass->check_valid_for_instantiation(false, CHECK_NULL);
1623 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1625 // Ignore result from call and return receiver
1626 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1627 return receiver();
1628 }
1631 #endif /* SUPPORT_OLD_REFLECTION */
