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comparison src/share/vm/runtime/reflection.cpp @ 0:a61af66fc99e jdk7-b24

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date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_reflection.cpp.incl"
27
28 #define JAVA_1_5_VERSION 49
29
30 static void trace_class_resolution(klassOop to_class) {
31 ResourceMark rm;
32 int line_number = -1;
33 const char * source_file = NULL;
34 klassOop caller = NULL;
35 JavaThread* jthread = JavaThread::current();
36 if (jthread->has_last_Java_frame()) {
37 vframeStream vfst(jthread);
38 // skip over any frames belonging to java.lang.Class
39 while (!vfst.at_end() &&
40 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) {
41 vfst.next();
42 }
43 if (!vfst.at_end()) {
44 // this frame is a likely suspect
45 caller = vfst.method()->method_holder();
46 line_number = vfst.method()->line_number_from_bci(vfst.bci());
47 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
48 if (s != NULL) {
49 source_file = s->as_C_string();
50 }
51 }
52 }
53 if (caller != NULL) {
54 const char * from = Klass::cast(caller)->external_name();
55 const char * to = Klass::cast(to_class)->external_name();
56 // print in a single call to reduce interleaving between threads
57 if (source_file != NULL) {
58 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
59 } else {
60 tty->print("RESOLVE %s %s (reflection)\n", from, to);
61 }
62 }
63 }
64
65
66 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
67 if (type == T_VOID) {
68 return NULL;
69 }
70 if (type == T_OBJECT || type == T_ARRAY) {
71 // regular objects are not boxed
72 return (oop) value->l;
73 }
74 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
75 if (result == NULL) {
76 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
77 }
78 return result;
79 }
80
81
82 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
83 if (box == NULL) {
84 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
85 }
86 return java_lang_boxing_object::get_value(box, value);
87 }
88
89 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
90 // Note: box is really the unboxed oop. It might even be a Short, etc.!
91 value->l = (jobject) box;
92 return T_OBJECT;
93 }
94
95
96 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
97 assert(wide_type != current_type, "widen should not be called with identical types");
98 switch (wide_type) {
99 case T_BOOLEAN:
100 case T_BYTE:
101 case T_CHAR:
102 break; // fail
103 case T_SHORT:
104 switch (current_type) {
105 case T_BYTE:
106 value->s = (jshort) value->b;
107 return;
108 }
109 break; // fail
110 case T_INT:
111 switch (current_type) {
112 case T_BYTE:
113 value->i = (jint) value->b;
114 return;
115 case T_CHAR:
116 value->i = (jint) value->c;
117 return;
118 case T_SHORT:
119 value->i = (jint) value->s;
120 return;
121 }
122 break; // fail
123 case T_LONG:
124 switch (current_type) {
125 case T_BYTE:
126 value->j = (jlong) value->b;
127 return;
128 case T_CHAR:
129 value->j = (jlong) value->c;
130 return;
131 case T_SHORT:
132 value->j = (jlong) value->s;
133 return;
134 case T_INT:
135 value->j = (jlong) value->i;
136 return;
137 }
138 break; // fail
139 case T_FLOAT:
140 switch (current_type) {
141 case T_BYTE:
142 value->f = (jfloat) value->b;
143 return;
144 case T_CHAR:
145 value->f = (jfloat) value->c;
146 return;
147 case T_SHORT:
148 value->f = (jfloat) value->s;
149 return;
150 case T_INT:
151 value->f = (jfloat) value->i;
152 return;
153 case T_LONG:
154 value->f = (jfloat) value->j;
155 return;
156 }
157 break; // fail
158 case T_DOUBLE:
159 switch (current_type) {
160 case T_BYTE:
161 value->d = (jdouble) value->b;
162 return;
163 case T_CHAR:
164 value->d = (jdouble) value->c;
165 return;
166 case T_SHORT:
167 value->d = (jdouble) value->s;
168 return;
169 case T_INT:
170 value->d = (jdouble) value->i;
171 return;
172 case T_FLOAT:
173 value->d = (jdouble) value->f;
174 return;
175 case T_LONG:
176 value->d = (jdouble) value->j;
177 return;
178 }
179 break; // fail
180 default:
181 break; // fail
182 }
183 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
184 }
185
186
187 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
188 if (!a->is_within_bounds(index)) {
189 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
190 }
191 if (a->is_objArray()) {
192 value->l = (jobject) objArrayOop(a)->obj_at(index);
193 return T_OBJECT;
194 } else {
195 assert(a->is_typeArray(), "just checking");
196 BasicType type = typeArrayKlass::cast(a->klass())->element_type();
197 switch (type) {
198 case T_BOOLEAN:
199 value->z = typeArrayOop(a)->bool_at(index);
200 break;
201 case T_CHAR:
202 value->c = typeArrayOop(a)->char_at(index);
203 break;
204 case T_FLOAT:
205 value->f = typeArrayOop(a)->float_at(index);
206 break;
207 case T_DOUBLE:
208 value->d = typeArrayOop(a)->double_at(index);
209 break;
210 case T_BYTE:
211 value->b = typeArrayOop(a)->byte_at(index);
212 break;
213 case T_SHORT:
214 value->s = typeArrayOop(a)->short_at(index);
215 break;
216 case T_INT:
217 value->i = typeArrayOop(a)->int_at(index);
218 break;
219 case T_LONG:
220 value->j = typeArrayOop(a)->long_at(index);
221 break;
222 default:
223 return T_ILLEGAL;
224 }
225 return type;
226 }
227 }
228
229
230 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
231 if (!a->is_within_bounds(index)) {
232 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
233 }
234 if (a->is_objArray()) {
235 if (value_type == T_OBJECT) {
236 oop obj = (oop) value->l;
237 if (obj != NULL) {
238 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass();
239 if (!obj->is_a(element_klass)) {
240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
241 }
242 }
243 objArrayOop(a)->obj_at_put(index, obj);
244 }
245 } else {
246 assert(a->is_typeArray(), "just checking");
247 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type();
248 if (array_type != value_type) {
249 // The widen operation can potentially throw an exception, but cannot block,
250 // so typeArrayOop a is safe if the call succeeds.
251 widen(value, value_type, array_type, CHECK);
252 }
253 switch (array_type) {
254 case T_BOOLEAN:
255 typeArrayOop(a)->bool_at_put(index, value->z);
256 break;
257 case T_CHAR:
258 typeArrayOop(a)->char_at_put(index, value->c);
259 break;
260 case T_FLOAT:
261 typeArrayOop(a)->float_at_put(index, value->f);
262 break;
263 case T_DOUBLE:
264 typeArrayOop(a)->double_at_put(index, value->d);
265 break;
266 case T_BYTE:
267 typeArrayOop(a)->byte_at_put(index, value->b);
268 break;
269 case T_SHORT:
270 typeArrayOop(a)->short_at_put(index, value->s);
271 break;
272 case T_INT:
273 typeArrayOop(a)->int_at_put(index, value->i);
274 break;
275 case T_LONG:
276 typeArrayOop(a)->long_at_put(index, value->j);
277 break;
278 default:
279 THROW(vmSymbols::java_lang_IllegalArgumentException());
280 }
281 }
282 }
283
284
285 klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
286 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
287 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
288 if (type == T_VOID) {
289 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
290 } else {
291 return Universe::typeArrayKlassObj(type);
292 }
293 }
294
295
296 oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) {
297 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type();
298 return Universe::java_mirror(type);
299 }
300
301
302 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
303 if (element_mirror == NULL) {
304 THROW_0(vmSymbols::java_lang_NullPointerException());
305 }
306 if (length < 0) {
307 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
308 }
309 if (java_lang_Class::is_primitive(element_mirror)) {
310 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
311 return typeArrayKlass::cast(tak)->allocate(length, THREAD);
312 } else {
313 klassOop k = java_lang_Class::as_klassOop(element_mirror);
314 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) {
315 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
316 }
317 return oopFactory::new_objArray(k, length, THREAD);
318 }
319 }
320
321
322 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
323 assert(dim_array->is_typeArray(), "just checking");
324 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
325
326 if (element_mirror == NULL) {
327 THROW_0(vmSymbols::java_lang_NullPointerException());
328 }
329
330 int len = dim_array->length();
331 if (len <= 0 || len > MAX_DIM) {
332 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
333 }
334
335 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
336 for (int i = 0; i < len; i++) {
337 int d = dim_array->int_at(i);
338 if (d < 0) {
339 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
340 }
341 dimensions[i] = d;
342 }
343
344 klassOop klass;
345 int dim = len;
346 if (java_lang_Class::is_primitive(element_mirror)) {
347 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
348 } else {
349 klass = java_lang_Class::as_klassOop(element_mirror);
350 if (Klass::cast(klass)->oop_is_array()) {
351 int k_dim = arrayKlass::cast(klass)->dimension();
352 if (k_dim + len > MAX_DIM) {
353 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
354 }
355 dim += k_dim;
356 }
357 }
358 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL);
359 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD);
360 assert(obj->is_array(), "just checking");
361 return arrayOop(obj);
362 }
363
364
365 oop Reflection::array_component_type(oop mirror, TRAPS) {
366 if (java_lang_Class::is_primitive(mirror)) {
367 return NULL;
368 }
369
370 klassOop klass = java_lang_Class::as_klassOop(mirror);
371 if (!Klass::cast(klass)->oop_is_array()) {
372 return NULL;
373 }
374
375 oop result = arrayKlass::cast(klass)->component_mirror();
376 #ifdef ASSERT
377 oop result2 = NULL;
378 if (arrayKlass::cast(klass)->dimension() == 1) {
379 if (Klass::cast(klass)->oop_is_typeArray()) {
380 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
381 } else {
382 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror();
383 }
384 } else {
385 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension();
386 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking");
387 result2 = Klass::cast(lower_dim)->java_mirror();
388 }
389 assert(result == result2, "results must be consistent");
390 #endif //ASSERT
391 return result;
392 }
393
394
395 bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) {
396 // field_class : declaring class
397 // acc : declared field access
398 // target_class : for protected
399
400 // Check if field or method is accessible to client. Throw an
401 // IllegalAccessException and return false if not.
402
403 // The "client" is the class associated with the nearest real frame
404 // getCallerClass already skips Method.invoke frames, so pass 0 in
405 // that case (same as classic).
406 ResourceMark rm(THREAD);
407 assert(THREAD->is_Java_thread(), "sanity check");
408 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
409
410 if (client_class != field_class) {
411 if (!verify_class_access(client_class, field_class, false)
412 || !verify_field_access(client_class,
413 field_class,
414 field_class,
415 acc,
416 false)) {
417 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
418 }
419 }
420
421 // Additional test for protected members: JLS 6.6.2
422
423 if (acc.is_protected()) {
424 if (target_class != client_class) {
425 if (!is_same_class_package(client_class, field_class)) {
426 if (!Klass::cast(target_class)->is_subclass_of(client_class)) {
427 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
428 }
429 }
430 }
431 }
432
433 // Passed all tests
434 return true;
435 }
436
437
438 bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) {
439 // Verify that current_class can access new_class. If the classloader_only
440 // flag is set, we automatically allow any accesses in which current_class
441 // doesn't have a classloader.
442 if ((current_class == NULL) ||
443 (current_class == new_class) ||
444 (instanceKlass::cast(new_class)->is_public()) ||
445 is_same_class_package(current_class, new_class)) {
446 return true;
447 }
448 // New (1.4) reflection implementation. Allow all accesses from
449 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
450 if ( JDK_Version::is_gte_jdk14x_version()
451 && UseNewReflection
452 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
453 return true;
454 }
455
456 return can_relax_access_check_for(current_class, new_class, classloader_only);
457 }
458
459 bool Reflection::can_relax_access_check_for(
460 klassOop accessor, klassOop accessee, bool classloader_only) {
461 instanceKlass* accessor_ik = instanceKlass::cast(accessor);
462 instanceKlass* accessee_ik = instanceKlass::cast(accessee);
463 if (RelaxAccessControlCheck ||
464 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
465 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
466 return classloader_only &&
467 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
468 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
469 accessor_ik->class_loader() == accessee_ik->class_loader();
470 } else {
471 return false;
472 }
473 }
474
475 bool Reflection::verify_field_access(klassOop current_class,
476 klassOop resolved_class,
477 klassOop field_class,
478 AccessFlags access,
479 bool classloader_only,
480 bool protected_restriction) {
481 // Verify that current_class can access a field of field_class, where that
482 // field's access bits are "access". We assume that we've already verified
483 // that current_class can access field_class.
484 //
485 // If the classloader_only flag is set, we automatically allow any accesses
486 // in which current_class doesn't have a classloader.
487 //
488 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
489 // need this distinction (e.g. if all we have is the runtime type, or during
490 // class file parsing when we only care about the static type); in that case
491 // callers should ensure that resolved_class == field_class.
492 //
493 if ((current_class == NULL) ||
494 (current_class == field_class) ||
495 access.is_public()) {
496 return true;
497 }
498
499 if (access.is_protected()) {
500 if (!protected_restriction) {
501 // See if current_class is a subclass of field_class
502 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
503 if (current_class == resolved_class ||
504 field_class == resolved_class ||
505 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
506 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
507 return true;
508 }
509 }
510 }
511 }
512
513 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
514 return true;
515 }
516
517 // New (1.4) reflection implementation. Allow all accesses from
518 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
519 if ( JDK_Version::is_gte_jdk14x_version()
520 && UseNewReflection
521 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
522 return true;
523 }
524
525 return can_relax_access_check_for(
526 current_class, field_class, classloader_only);
527 }
528
529
530 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
531 return instanceKlass::cast(class1)->is_same_class_package(class2);
532 }
533
534
535 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
536 // throw an incompatible class change exception
537 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, TRAPS) {
538 const int inner_class_info_index = 0;
539 const int outer_class_info_index = 1;
540
541 typeArrayHandle icls (THREAD, outer->inner_classes());
542 constantPoolHandle cp (THREAD, outer->constants());
543 for(int i = 0; i < icls->length(); i += 4) {
544 int ioff = icls->ushort_at(i + inner_class_info_index);
545 int ooff = icls->ushort_at(i + outer_class_info_index);
546
547 if (ioff != 0 && ooff != 0) {
548 klassOop o = cp->klass_at(ooff, CHECK);
549 if (o == outer()) {
550 klassOop i = cp->klass_at(ioff, CHECK);
551 if (i == inner()) {
552 return;
553 }
554 }
555 }
556 }
557
558 // 'inner' not declared as an inner klass in outer
559 ResourceMark rm(THREAD);
560 Exceptions::fthrow(
561 THREAD_AND_LOCATION,
562 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
563 "%s and %s disagree on InnerClasses attribute",
564 outer->external_name(),
565 inner->external_name()
566 );
567 }
568
569 // Utility method converting a single SignatureStream element into java.lang.Class instance
570
571 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
572 switch (ss->type()) {
573 default:
574 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
575 return java_lang_Class::primitive_mirror(ss->type());
576 case T_OBJECT:
577 case T_ARRAY:
578 symbolOop name = ss->as_symbol(CHECK_NULL);
579 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
580 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
581 klassOop k = SystemDictionary::resolve_or_fail(
582 symbolHandle(THREAD, name),
583 Handle(THREAD, loader),
584 Handle(THREAD, protection_domain),
585 true, CHECK_NULL);
586 if (TraceClassResolution) {
587 trace_class_resolution(k);
588 }
589 return k->klass_part()->java_mirror();
590 };
591 }
592
593
594 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
595 // Allocate array holding parameter types (java.lang.Class instances)
596 objArrayOop m = oopFactory::new_objArray(SystemDictionary::class_klass(), parameter_count, CHECK_(objArrayHandle()));
597 objArrayHandle mirrors (THREAD, m);
598 int index = 0;
599 // Collect parameter types
600 symbolHandle signature (THREAD, method->signature());
601 SignatureStream ss(signature);
602 while (!ss.at_return_type()) {
603 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
604 mirrors->obj_at_put(index++, mirror);
605 ss.next();
606 }
607 assert(index == parameter_count, "invalid parameter count");
608 if (return_type != NULL) {
609 // Collect return type as well
610 assert(ss.at_return_type(), "return type should be present");
611 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
612 }
613 return mirrors;
614 }
615
616 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
617 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
618 }
619
620
621 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
622 // Basic types
623 BasicType type = vmSymbols::signature_type(signature());
624 if (type != T_OBJECT) {
625 return Handle(THREAD, Universe::java_mirror(type));
626 }
627
628 oop loader = instanceKlass::cast(k())->class_loader();
629 oop protection_domain = Klass::cast(k())->protection_domain();
630 klassOop result = SystemDictionary::resolve_or_fail(signature,
631 Handle(THREAD, loader),
632 Handle(THREAD, protection_domain),
633 true, CHECK_(Handle()));
634
635 if (TraceClassResolution) {
636 trace_class_resolution(result);
637 }
638
639 oop nt = Klass::cast(result)->java_mirror();
640 return Handle(THREAD, nt);
641 }
642
643
644 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
645 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
646 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
647 assert(!method()->is_initializer() ||
648 (for_constant_pool_access && method()->is_static()) ||
649 (method()->name() == vmSymbols::class_initializer_name()
650 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
651 instanceKlassHandle holder (THREAD, method->method_holder());
652 int slot = method->method_idnum();
653
654 symbolHandle signature (THREAD, method->signature());
655 int parameter_count = ArgumentCount(signature).size();
656 oop return_type_oop = NULL;
657 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
658 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
659
660 Handle return_type(THREAD, return_type_oop);
661
662 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
663
664 if (exception_types.is_null()) return NULL;
665
666 symbolHandle method_name(THREAD, method->name());
667 Handle name;
668 if (intern_name) {
669 // intern_name is only true with UseNewReflection
670 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
671 name = Handle(THREAD, name_oop);
672 } else {
673 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
674 }
675 if (name.is_null()) return NULL;
676
677 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
678
679 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
680
681 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
682 java_lang_reflect_Method::set_slot(mh(), slot);
683 java_lang_reflect_Method::set_name(mh(), name());
684 java_lang_reflect_Method::set_return_type(mh(), return_type());
685 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
686 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
687 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
688 java_lang_reflect_Method::set_override(mh(), false);
689 if (java_lang_reflect_Method::has_signature_field() &&
690 method->generic_signature() != NULL) {
691 symbolHandle gs(THREAD, method->generic_signature());
692 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
693 java_lang_reflect_Method::set_signature(mh(), sig());
694 }
695 if (java_lang_reflect_Method::has_annotations_field()) {
696 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
697 }
698 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
699 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
700 }
701 if (java_lang_reflect_Method::has_annotation_default_field()) {
702 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
703 }
704 return mh();
705 }
706
707
708 oop Reflection::new_constructor(methodHandle method, TRAPS) {
709 assert(method()->is_initializer(), "should call new_method instead");
710
711 instanceKlassHandle holder (THREAD, method->method_holder());
712 int slot = method->method_idnum();
713
714 symbolHandle signature (THREAD, method->signature());
715 int parameter_count = ArgumentCount(signature).size();
716 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
717 if (parameter_types.is_null()) return NULL;
718
719 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
720 if (exception_types.is_null()) return NULL;
721
722 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
723
724 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
725
726 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
727 java_lang_reflect_Constructor::set_slot(ch(), slot);
728 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
729 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
730 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
731 java_lang_reflect_Constructor::set_override(ch(), false);
732 if (java_lang_reflect_Constructor::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_Constructor::set_signature(ch(), sig());
737 }
738 if (java_lang_reflect_Constructor::has_annotations_field()) {
739 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
740 }
741 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
742 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
743 }
744 return ch();
745 }
746
747
748 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
749 symbolHandle field_name(THREAD, fd->name());
750 Handle name;
751 if (intern_name) {
752 // intern_name is only true with UseNewReflection
753 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
754 name = Handle(THREAD, name_oop);
755 } else {
756 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
757 }
758 symbolHandle signature (THREAD, fd->signature());
759 KlassHandle holder (THREAD, fd->field_holder());
760 Handle type = new_type(signature, holder, CHECK_NULL);
761 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
762
763 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
764 java_lang_reflect_Field::set_slot(rh(), fd->index());
765 java_lang_reflect_Field::set_name(rh(), name());
766 java_lang_reflect_Field::set_type(rh(), type());
767 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
768 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
769 java_lang_reflect_Field::set_override(rh(), false);
770 if (java_lang_reflect_Field::has_signature_field() &&
771 fd->generic_signature() != NULL) {
772 symbolHandle gs(THREAD, fd->generic_signature());
773 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
774 java_lang_reflect_Field::set_signature(rh(), sig());
775 }
776 if (java_lang_reflect_Field::has_annotations_field()) {
777 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
778 }
779 return rh();
780 }
781
782
783 //---------------------------------------------------------------------------
784 //
785 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
786 //
787 // See reflection.hpp for details.
788 //
789 //---------------------------------------------------------------------------
790
791 #ifdef SUPPORT_OLD_REFLECTION
792
793 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
794 KlassHandle recv_klass, Handle receiver, TRAPS) {
795 assert(!method.is_null() , "method should not be null");
796
797 CallInfo info;
798 symbolHandle signature (THREAD, method->signature());
799 symbolHandle name (THREAD, method->name());
800 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
801 name, signature,
802 KlassHandle(), false, true,
803 CHECK_(methodHandle()));
804 return info.selected_method();
805 }
806
807
808 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
809 Handle receiver, bool override, objArrayHandle ptypes,
810 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
811 ResourceMark rm(THREAD);
812
813 methodHandle method; // actual method to invoke
814 KlassHandle target_klass; // target klass, receiver's klass for non-static
815
816 // Ensure klass is initialized
817 klass->initialize(CHECK_NULL);
818
819 bool is_static = reflected_method->is_static();
820 if (is_static) {
821 // ignore receiver argument
822 method = reflected_method;
823 target_klass = klass;
824 } else {
825 // check for null receiver
826 if (receiver.is_null()) {
827 THROW_0(vmSymbols::java_lang_NullPointerException());
828 }
829 // Check class of receiver against class declaring method
830 if (!receiver->is_a(klass())) {
831 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
832 }
833 // target klass is receiver's klass
834 target_klass = KlassHandle(THREAD, receiver->klass());
835 // no need to resolve if method is private or <init>
836 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
837 method = reflected_method;
838 } else {
839 // resolve based on the receiver
840 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
841 // resolve interface call
842 if (ReflectionWrapResolutionErrors) {
843 // new default: 6531596
844 // Match resolution errors with those thrown due to reflection inlining
845 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
846 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
847 if (HAS_PENDING_EXCEPTION) {
848 // Method resolution threw an exception; wrap it in an InvocationTargetException
849 oop resolution_exception = PENDING_EXCEPTION;
850 CLEAR_PENDING_EXCEPTION;
851 JavaCallArguments args(Handle(THREAD, resolution_exception));
852 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
853 vmSymbolHandles::throwable_void_signature(),
854 &args);
855 }
856 } else {
857 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
858 }
859 } else {
860 // if the method can be overridden, we resolve using the vtable index.
861 int index = reflected_method->vtable_index();
862 method = reflected_method;
863 if (index != methodOopDesc::nonvirtual_vtable_index) {
864 // target_klass might be an arrayKlassOop but all vtables start at
865 // the same place. The cast is to avoid virtual call and assertion.
866 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
867 method = methodHandle(THREAD, inst->method_at_vtable(index));
868 }
869 if (!method.is_null()) {
870 // Check for abstract methods as well
871 if (method->is_abstract()) {
872 // new default: 6531596
873 if (ReflectionWrapResolutionErrors) {
874 ResourceMark rm(THREAD);
875 Handle h_origexception = Exceptions::new_exception(THREAD,
876 vmSymbols::java_lang_AbstractMethodError(),
877 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
878 method->name(),
879 method->signature()));
880 JavaCallArguments args(h_origexception);
881 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
882 vmSymbolHandles::throwable_void_signature(),
883 &args);
884 } else {
885 ResourceMark rm(THREAD);
886 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
887 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
888 method->name(),
889 method->signature()));
890 }
891 }
892 }
893 }
894 }
895 }
896
897 // I believe this is a ShouldNotGetHere case which requires
898 // an internal vtable bug. If you ever get this please let Karen know.
899 if (method.is_null()) {
900 ResourceMark rm(THREAD);
901 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
902 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
903 reflected_method->name(),
904 reflected_method->signature()));
905 }
906
907 // In the JDK 1.4 reflection implementation, the security check is
908 // done at the Java level
909 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
910
911 // Access checking (unless overridden by Method)
912 if (!override) {
913 if (!(klass->is_public() && reflected_method->is_public())) {
914 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
915 if (!access) {
916 return NULL; // exception
917 }
918 }
919 }
920
921 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
922
923 assert(ptypes->is_objArray(), "just checking");
924 int args_len = args.is_null() ? 0 : args->length();
925 // Check number of arguments
926 if (ptypes->length() != args_len) {
927 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
928 }
929
930 // Create object to contain parameters for the JavaCall
931 JavaCallArguments java_args(method->size_of_parameters());
932
933 if (!is_static) {
934 java_args.push_oop(receiver);
935 }
936
937 for (int i = 0; i < args_len; i++) {
938 oop type_mirror = ptypes->obj_at(i);
939 oop arg = args->obj_at(i);
940 if (java_lang_Class::is_primitive(type_mirror)) {
941 jvalue value;
942 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
943 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
944 if (ptype != atype) {
945 widen(&value, atype, ptype, CHECK_NULL);
946 }
947 switch (ptype) {
948 case T_BOOLEAN: java_args.push_int(value.z); break;
949 case T_CHAR: java_args.push_int(value.c); break;
950 case T_BYTE: java_args.push_int(value.b); break;
951 case T_SHORT: java_args.push_int(value.s); break;
952 case T_INT: java_args.push_int(value.i); break;
953 case T_LONG: java_args.push_long(value.j); break;
954 case T_FLOAT: java_args.push_float(value.f); break;
955 case T_DOUBLE: java_args.push_double(value.d); break;
956 default:
957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
958 }
959 } else {
960 if (arg != NULL) {
961 klassOop k = java_lang_Class::as_klassOop(type_mirror);
962 if (!arg->is_a(k)) {
963 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
964 }
965 }
966 Handle arg_handle(THREAD, arg); // Create handle for argument
967 java_args.push_oop(arg_handle); // Push handle
968 }
969 }
970
971 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
972
973 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
974 // oop (i.e., NOT as an handle)
975 JavaValue result(rtype);
976 JavaCalls::call(&result, method, &java_args, THREAD);
977
978 if (HAS_PENDING_EXCEPTION) {
979 // Method threw an exception; wrap it in an InvocationTargetException
980 oop target_exception = PENDING_EXCEPTION;
981 CLEAR_PENDING_EXCEPTION;
982 JavaCallArguments args(Handle(THREAD, target_exception));
983 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
984 vmSymbolHandles::throwable_void_signature(),
985 &args);
986 } else {
987 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
988 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
989 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
990 }
991 }
992
993
994 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
995 switch (narrow_type) {
996 case T_BOOLEAN:
997 value->z = (jboolean) value->i;
998 return;
999 case T_BYTE:
1000 value->b = (jbyte) value->i;
1001 return;
1002 case T_CHAR:
1003 value->c = (jchar) value->i;
1004 return;
1005 case T_SHORT:
1006 value->s = (jshort) value->i;
1007 return;
1008 default:
1009 break; // fail
1010 }
1011 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1012 }
1013
1014
1015 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1016 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1017 return java_lang_Class::primitive_type(basic_type_mirror);
1018 }
1019
1020
1021 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1022 int types_len = types.is_null() ? 0 : types->length();
1023 if (types_len != parameter_count) return false;
1024 if (parameter_count > 0) {
1025 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1026 for (int index = 0; index < parameter_count; index++) {
1027 if (types->obj_at(index) != method_types->obj_at(index)) {
1028 return false;
1029 }
1030 }
1031 }
1032 return true;
1033 }
1034
1035
1036 oop Reflection::new_field(FieldStream* st, TRAPS) {
1037 symbolHandle field_name(THREAD, st->name());
1038 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1039 symbolHandle signature(THREAD, st->signature());
1040 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1041 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1042 oop result = rh();
1043
1044 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1045 java_lang_reflect_Field::set_slot(result, st->index());
1046 java_lang_reflect_Field::set_name(result, name());
1047 java_lang_reflect_Field::set_type(result, type());
1048 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1049 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1050 java_lang_reflect_Field::set_override(result, false);
1051 return result;
1052 }
1053
1054
1055 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1056 if (field_mirror.is_null()) {
1057 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1058 }
1059
1060 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1061 int slot = java_lang_reflect_Field::slot(field_mirror());
1062
1063 // Ensure klass is initialized
1064 klass->initialize(CHECK_false);
1065 fd->initialize(klass(), slot);
1066
1067 bool is_static = fd->is_static();
1068 KlassHandle receiver_klass;
1069
1070 if (is_static) {
1071 receiver = KlassHandle(THREAD, klass());
1072 receiver_klass = klass;
1073 } else {
1074 // Check object is a non-null instance of declaring class
1075 if (receiver.is_null()) {
1076 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1077 }
1078 if (!receiver->is_a(klass())) {
1079 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1080 }
1081 receiver_klass = KlassHandle(THREAD, receiver->klass());
1082 }
1083
1084 // Access checking (unless overridden by Field)
1085 if (!java_lang_reflect_Field::override(field_mirror())) {
1086 if (!(klass->is_public() && fd->is_public())) {
1087 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1088 if (!access_check) {
1089 return false; // exception
1090 }
1091 }
1092 }
1093
1094 if (check_final && fd->is_final()) {
1095 // In 1.3 we always throw an error when attempting to set a final field.
1096 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1097 // We currently maintain backwards compatibility. See bug 4250960.
1098 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1099 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1100 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1101 }
1102 }
1103 return true;
1104 }
1105
1106
1107 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1108 BasicType field_type = fd->field_type();
1109 int offset = fd->offset();
1110 switch (field_type) {
1111 case T_BOOLEAN:
1112 value->z = receiver->bool_field(offset);
1113 break;
1114 case T_CHAR:
1115 value->c = receiver->char_field(offset);
1116 break;
1117 case T_FLOAT:
1118 value->f = receiver->float_field(offset);
1119 break;
1120 case T_DOUBLE:
1121 value->d = receiver->double_field(offset);
1122 break;
1123 case T_BYTE:
1124 value->b = receiver->byte_field(offset);
1125 break;
1126 case T_SHORT:
1127 value->s = receiver->short_field(offset);
1128 break;
1129 case T_INT:
1130 value->i = receiver->int_field(offset);
1131 break;
1132 case T_LONG:
1133 value->j = receiver->long_field(offset);
1134 break;
1135 case T_OBJECT:
1136 case T_ARRAY:
1137 value->l = (jobject) receiver->obj_field(offset);
1138 break;
1139 default:
1140 return T_ILLEGAL;
1141 }
1142 return field_type;
1143 }
1144
1145
1146 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1147 BasicType field_type = fd->field_type();
1148 if (field_type != value_type) {
1149 widen(value, value_type, field_type, CHECK);
1150 }
1151
1152 int offset = fd->offset();
1153 switch (field_type) {
1154 case T_BOOLEAN:
1155 receiver->bool_field_put(offset, value->z);
1156 break;
1157 case T_CHAR:
1158 receiver->char_field_put(offset, value->c);
1159 break;
1160 case T_FLOAT:
1161 receiver->float_field_put(offset, value->f);
1162 break;
1163 case T_DOUBLE:
1164 receiver->double_field_put(offset, value->d);
1165 break;
1166 case T_BYTE:
1167 receiver->byte_field_put(offset, value->b);
1168 break;
1169 case T_SHORT:
1170 receiver->short_field_put(offset, value->s);
1171 break;
1172 case T_INT:
1173 receiver->int_field_put(offset, value->i);
1174 break;
1175 case T_LONG:
1176 receiver->long_field_put(offset, value->j);
1177 break;
1178 case T_OBJECT:
1179 case T_ARRAY: {
1180 Handle obj(THREAD, (oop) value->l);
1181 if (obj.not_null()) {
1182 symbolHandle signature(THREAD, fd->signature());
1183 Handle loader (THREAD, fd->loader());
1184 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1185 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1186 if (!obj->is_a(k)) {
1187 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1188 }
1189 }
1190 receiver->obj_field_put(offset, obj());
1191 break;
1192 }
1193 default:
1194 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1195 }
1196 }
1197
1198
1199 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1200 // Exclude primitive types and array types
1201 if (java_lang_Class::is_primitive(mirror)) return NULL;
1202 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1203
1204 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1205 bool local_fields_only = (which == DECLARED);
1206
1207 // Ensure class is linked
1208 k->link_class(CHECK_NULL);
1209
1210 // Search class and interface fields
1211 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1212 if (st.name() == field_name) {
1213 if (local_fields_only || st.access_flags().is_public()) {
1214 return new_field(&st, THREAD);
1215 }
1216 }
1217 }
1218
1219 return NULL;
1220 }
1221
1222
1223 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1224 // Exclude primitive types and array types
1225 if (java_lang_Class::is_primitive(mirror)
1226 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1227 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1228 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1229 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1230 }
1231
1232 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1233
1234 // Ensure class is linked
1235 k->link_class(CHECK_NULL);
1236
1237 bool local_fields_only = (which == DECLARED);
1238 int count = 0;
1239 { // Compute fields count for class and interface fields
1240 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1241 if (local_fields_only || st.access_flags().is_public()) {
1242 count++;
1243 }
1244 }
1245 }
1246
1247 // Allocate result
1248 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1249 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1250 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1251 objArrayHandle result (THREAD, r);
1252
1253 // Fill in results backwards
1254 {
1255 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1256 if (local_fields_only || st.access_flags().is_public()) {
1257 oop field = new_field(&st, CHECK_NULL);
1258 result->obj_at_put(--count, field);
1259 }
1260 }
1261 assert(count == 0, "just checking");
1262 }
1263 return result();
1264 }
1265
1266
1267 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1268 if (java_lang_Class::is_primitive(mirror)) return NULL;
1269 klassOop klass = java_lang_Class::as_klassOop(mirror);
1270 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1271
1272 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1273 klass = SystemDictionary::object_klass();
1274 }
1275 instanceKlassHandle h_k(THREAD, klass);
1276
1277 // Ensure klass is linked (need not be initialized)
1278 h_k->link_class(CHECK_NULL);
1279
1280 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1281 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1282
1283 switch (which) {
1284 case MEMBER_PUBLIC:
1285 // First the public non-static methods (works if method holder is an interface)
1286 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1287 {
1288 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1289 methodHandle m(THREAD, st.method());
1290 // For interfaces include static initializers since classic does that!
1291 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1292 symbolHandle signature(THREAD, m->signature());
1293 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1294 if (parameter_match) {
1295 return new_method(m, false, false, THREAD);
1296 }
1297 }
1298 }
1299 }
1300 // Then the public static methods (works if method holder is an interface)
1301 {
1302 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1303 methodHandle m(THREAD, st.method());
1304 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1305 symbolHandle signature(THREAD, m->signature());
1306 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1307 if (parameter_match) {
1308 return new_method(m, false, false, THREAD);
1309 }
1310 }
1311 }
1312 }
1313 break;
1314 case MEMBER_DECLARED:
1315 // All local methods
1316 {
1317 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1318 methodHandle m(THREAD, st.method());
1319 if (method_name() == m->name() && !m->is_initializer()) {
1320 symbolHandle signature(THREAD, m->signature());
1321 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1322 if (parameter_match) {
1323 return new_method(m, false, false, THREAD);
1324 }
1325 }
1326 }
1327 }
1328 break;
1329 default:
1330 break;
1331 }
1332 return NULL;
1333 }
1334
1335
1336 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1337 // Exclude primitive types
1338 if (java_lang_Class::is_primitive(mirror) ||
1339 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1340 klassOop klass = SystemDictionary::reflect_method_klass();
1341 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1342 }
1343
1344 klassOop klass = java_lang_Class::as_klassOop(mirror);
1345 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1346 klass = SystemDictionary::object_klass();
1347 }
1348 instanceKlassHandle h_k(THREAD, klass);
1349
1350 // Ensure klass is linked (need not be initialized)
1351 h_k->link_class(CHECK_NULL);
1352
1353 // We search the (super)interfaces only if h_k is an interface itself
1354 bool is_interface = h_k->is_interface();
1355
1356 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1357 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1358
1359 switch (which) {
1360 case MEMBER_PUBLIC:
1361 {
1362
1363 // Count public methods (non-static and static)
1364 int count = 0;
1365 {
1366 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1367 methodOop m = st.method();
1368 // For interfaces include static initializers since classic does that!
1369 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1370 count++;
1371 }
1372 }
1373 }
1374
1375 // Allocate result
1376 klassOop klass = SystemDictionary::reflect_method_klass();
1377 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1378 objArrayHandle h_result (THREAD, r);
1379
1380 // Fill in results backwards
1381 {
1382 // First the non-static public methods
1383 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1384 methodHandle m (THREAD, st.method());
1385 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1386 oop method = new_method(m, false, false, CHECK_NULL);
1387 if (method == NULL) {
1388 return NULL;
1389 } else {
1390 h_result->obj_at_put(--count, method);
1391 }
1392 }
1393 }
1394 }
1395 {
1396 // Then the static public methods
1397 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1398 methodHandle m (THREAD, st.method());
1399 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1400 oop method = new_method(m, false, false, CHECK_NULL);
1401 if (method == NULL) {
1402 return NULL;
1403 } else {
1404 h_result->obj_at_put(--count, method);
1405 }
1406 }
1407 }
1408 }
1409
1410 assert(count == 0, "just checking");
1411 return h_result();
1412 }
1413
1414 case MEMBER_DECLARED:
1415 {
1416 // Count all methods
1417 int count = 0;
1418 {
1419 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1420 methodOop m = st.method();
1421 if (!m->is_initializer()) {
1422 count++;
1423 }
1424 }
1425 }
1426 // Allocate result
1427 klassOop klass = SystemDictionary::reflect_method_klass();
1428 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1429 objArrayHandle h_result (THREAD, r);
1430
1431 // Fill in results backwards
1432 {
1433 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1434 methodHandle m (THREAD, st.method());
1435 if (!m->is_initializer()) {
1436 oop method = new_method(m, false, false, CHECK_NULL);
1437 if (method == NULL) {
1438 return NULL;
1439 } else {
1440 h_result->obj_at_put(--count, method);
1441 }
1442 }
1443 }
1444 }
1445 assert(count == 0, "just checking");
1446 return h_result();
1447 }
1448 }
1449 ShouldNotReachHere();
1450 return NULL;
1451 }
1452
1453
1454 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1455
1456 // Exclude primitive, interface and array types
1457 bool prim = java_lang_Class::is_primitive(mirror);
1458 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1459 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1460
1461 // Must be instance klass
1462 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1463
1464 // Ensure klass is linked (need not be initialized)
1465 h_k->link_class(CHECK_NULL);
1466
1467 bool local_only = (which == MEMBER_DECLARED);
1468 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1469 methodHandle m(THREAD, st.method());
1470 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1471 symbolHandle signature(THREAD, m->signature());
1472 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1473 if (parameter_match) {
1474 return new_constructor(m, THREAD);
1475 }
1476 }
1477 }
1478
1479 return NULL;
1480 }
1481
1482
1483 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1484 // Exclude primitive, interface and array types
1485 bool prim = java_lang_Class::is_primitive(mirror);
1486 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1487 if (prim || k->is_interface() || k->oop_is_array()) {
1488 return oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0, CHECK_NULL); // Return empty array
1489 }
1490
1491 // Must be instanceKlass at this point
1492 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1493
1494 // Ensure klass is linked (need not be initialized)
1495 h_k->link_class(CHECK_NULL);
1496
1497 bool local_only = (which == MEMBER_DECLARED);
1498 int count = 0;
1499 {
1500 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1501 methodOop m = st.method();
1502 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1503 count++;
1504 }
1505 }
1506 }
1507
1508 // Allocate result
1509 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1510 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1511 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1512 objArrayHandle h_result (THREAD, r);
1513
1514 // Fill in results backwards
1515 {
1516 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1517 methodHandle m (THREAD, st.method());
1518 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1519 oop constr = new_constructor(m, CHECK_NULL);
1520 if (constr == NULL) {
1521 return NULL;
1522 } else {
1523 h_result->obj_at_put(--count, constr);
1524 }
1525 }
1526 }
1527 assert(count == 0, "just checking");
1528 }
1529 return h_result();
1530 }
1531
1532
1533 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1534 // of java.lang.reflect.Constructor
1535
1536 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1537 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1538 int slot = java_lang_reflect_Method::slot(method_mirror);
1539 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1540 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1541
1542 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1543 BasicType rtype;
1544 if (java_lang_Class::is_primitive(return_type_mirror)) {
1545 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1546 } else {
1547 rtype = T_OBJECT;
1548 }
1549
1550 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1551 if (!klass->methods()->is_within_bounds(slot)) {
1552 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1553 }
1554 methodHandle method(THREAD, methodOop(klass->methods()->obj_at(slot)));
1555
1556 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1557 }
1558
1559
1560 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1561 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1562 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1563 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1564 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1565
1566 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1567 if (!klass->methods()->is_within_bounds(slot)) {
1568 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1569 }
1570 methodHandle method(THREAD, methodOop(klass->methods()->obj_at(slot)));
1571 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1572
1573 // Make sure klass gets initialize
1574 klass->initialize(CHECK_NULL);
1575
1576 // Create new instance (the receiver)
1577 klass->check_valid_for_instantiation(false, CHECK_NULL);
1578 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1579
1580 // Ignore result from call and return receiver
1581 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1582 return receiver();
1583 }
1584
1585
1586 #endif /* SUPPORT_OLD_REFLECTION */