Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/reflection.cpp@2b42b31e7928
src/share/vm/runtime/reflection.cpp
Fri, 21 Nov 2008 08:09:11 -0800
- author
- coleenp
- date
- Fri, 21 Nov 2008 08:09:11 -0800
- changeset 882
- 2b42b31e7928
- parent 631
- d1605aabd0a1
- child 866
- a45484ea312d
- permissions
- -rw-r--r--
6676175: BigApps crash JVM Client VM (build 10.0-b22, mixed mode, sharing) with SIGSEGV (0xb)
Summary: Add test for biased locking epoch before walking own thread stack in case of rare race
Reviewed-by: phh, never
1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_reflection.cpp.incl"
28 #define JAVA_1_5_VERSION 49
30 static void trace_class_resolution(klassOop to_class) {
31 ResourceMark rm;
32 int line_number = -1;
33 const char * source_file = NULL;
34 klassOop caller = NULL;
35 JavaThread* jthread = JavaThread::current();
36 if (jthread->has_last_Java_frame()) {
37 vframeStream vfst(jthread);
38 // skip over any frames belonging to java.lang.Class
39 while (!vfst.at_end() &&
40 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) {
41 vfst.next();
42 }
43 if (!vfst.at_end()) {
44 // this frame is a likely suspect
45 caller = vfst.method()->method_holder();
46 line_number = vfst.method()->line_number_from_bci(vfst.bci());
47 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
48 if (s != NULL) {
49 source_file = s->as_C_string();
50 }
51 }
52 }
53 if (caller != NULL) {
54 const char * from = Klass::cast(caller)->external_name();
55 const char * to = Klass::cast(to_class)->external_name();
56 // print in a single call to reduce interleaving between threads
57 if (source_file != NULL) {
58 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
59 } else {
60 tty->print("RESOLVE %s %s (reflection)\n", from, to);
61 }
62 }
63 }
66 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
67 if (type == T_VOID) {
68 return NULL;
69 }
70 if (type == T_OBJECT || type == T_ARRAY) {
71 // regular objects are not boxed
72 return (oop) value->l;
73 }
74 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
75 if (result == NULL) {
76 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
77 }
78 return result;
79 }
82 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
83 if (box == NULL) {
84 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
85 }
86 return java_lang_boxing_object::get_value(box, value);
87 }
89 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
90 // Note: box is really the unboxed oop. It might even be a Short, etc.!
91 value->l = (jobject) box;
92 return T_OBJECT;
93 }
96 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
97 assert(wide_type != current_type, "widen should not be called with identical types");
98 switch (wide_type) {
99 case T_BOOLEAN:
100 case T_BYTE:
101 case T_CHAR:
102 break; // fail
103 case T_SHORT:
104 switch (current_type) {
105 case T_BYTE:
106 value->s = (jshort) value->b;
107 return;
108 }
109 break; // fail
110 case T_INT:
111 switch (current_type) {
112 case T_BYTE:
113 value->i = (jint) value->b;
114 return;
115 case T_CHAR:
116 value->i = (jint) value->c;
117 return;
118 case T_SHORT:
119 value->i = (jint) value->s;
120 return;
121 }
122 break; // fail
123 case T_LONG:
124 switch (current_type) {
125 case T_BYTE:
126 value->j = (jlong) value->b;
127 return;
128 case T_CHAR:
129 value->j = (jlong) value->c;
130 return;
131 case T_SHORT:
132 value->j = (jlong) value->s;
133 return;
134 case T_INT:
135 value->j = (jlong) value->i;
136 return;
137 }
138 break; // fail
139 case T_FLOAT:
140 switch (current_type) {
141 case T_BYTE:
142 value->f = (jfloat) value->b;
143 return;
144 case T_CHAR:
145 value->f = (jfloat) value->c;
146 return;
147 case T_SHORT:
148 value->f = (jfloat) value->s;
149 return;
150 case T_INT:
151 value->f = (jfloat) value->i;
152 return;
153 case T_LONG:
154 value->f = (jfloat) value->j;
155 return;
156 }
157 break; // fail
158 case T_DOUBLE:
159 switch (current_type) {
160 case T_BYTE:
161 value->d = (jdouble) value->b;
162 return;
163 case T_CHAR:
164 value->d = (jdouble) value->c;
165 return;
166 case T_SHORT:
167 value->d = (jdouble) value->s;
168 return;
169 case T_INT:
170 value->d = (jdouble) value->i;
171 return;
172 case T_FLOAT:
173 value->d = (jdouble) value->f;
174 return;
175 case T_LONG:
176 value->d = (jdouble) value->j;
177 return;
178 }
179 break; // fail
180 default:
181 break; // fail
182 }
183 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
184 }
187 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
188 if (!a->is_within_bounds(index)) {
189 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
190 }
191 if (a->is_objArray()) {
192 value->l = (jobject) objArrayOop(a)->obj_at(index);
193 return T_OBJECT;
194 } else {
195 assert(a->is_typeArray(), "just checking");
196 BasicType type = typeArrayKlass::cast(a->klass())->element_type();
197 switch (type) {
198 case T_BOOLEAN:
199 value->z = typeArrayOop(a)->bool_at(index);
200 break;
201 case T_CHAR:
202 value->c = typeArrayOop(a)->char_at(index);
203 break;
204 case T_FLOAT:
205 value->f = typeArrayOop(a)->float_at(index);
206 break;
207 case T_DOUBLE:
208 value->d = typeArrayOop(a)->double_at(index);
209 break;
210 case T_BYTE:
211 value->b = typeArrayOop(a)->byte_at(index);
212 break;
213 case T_SHORT:
214 value->s = typeArrayOop(a)->short_at(index);
215 break;
216 case T_INT:
217 value->i = typeArrayOop(a)->int_at(index);
218 break;
219 case T_LONG:
220 value->j = typeArrayOop(a)->long_at(index);
221 break;
222 default:
223 return T_ILLEGAL;
224 }
225 return type;
226 }
227 }
230 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
231 if (!a->is_within_bounds(index)) {
232 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
233 }
234 if (a->is_objArray()) {
235 if (value_type == T_OBJECT) {
236 oop obj = (oop) value->l;
237 if (obj != NULL) {
238 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass();
239 if (!obj->is_a(element_klass)) {
240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
241 }
242 }
243 objArrayOop(a)->obj_at_put(index, obj);
244 }
245 } else {
246 assert(a->is_typeArray(), "just checking");
247 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type();
248 if (array_type != value_type) {
249 // The widen operation can potentially throw an exception, but cannot block,
250 // so typeArrayOop a is safe if the call succeeds.
251 widen(value, value_type, array_type, CHECK);
252 }
253 switch (array_type) {
254 case T_BOOLEAN:
255 typeArrayOop(a)->bool_at_put(index, value->z);
256 break;
257 case T_CHAR:
258 typeArrayOop(a)->char_at_put(index, value->c);
259 break;
260 case T_FLOAT:
261 typeArrayOop(a)->float_at_put(index, value->f);
262 break;
263 case T_DOUBLE:
264 typeArrayOop(a)->double_at_put(index, value->d);
265 break;
266 case T_BYTE:
267 typeArrayOop(a)->byte_at_put(index, value->b);
268 break;
269 case T_SHORT:
270 typeArrayOop(a)->short_at_put(index, value->s);
271 break;
272 case T_INT:
273 typeArrayOop(a)->int_at_put(index, value->i);
274 break;
275 case T_LONG:
276 typeArrayOop(a)->long_at_put(index, value->j);
277 break;
278 default:
279 THROW(vmSymbols::java_lang_IllegalArgumentException());
280 }
281 }
282 }
285 klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
286 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
287 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
288 if (type == T_VOID) {
289 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
290 } else {
291 return Universe::typeArrayKlassObj(type);
292 }
293 }
296 oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) {
297 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type();
298 return Universe::java_mirror(type);
299 }
302 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
303 if (element_mirror == NULL) {
304 THROW_0(vmSymbols::java_lang_NullPointerException());
305 }
306 if (length < 0) {
307 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
308 }
309 if (java_lang_Class::is_primitive(element_mirror)) {
310 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
311 return typeArrayKlass::cast(tak)->allocate(length, THREAD);
312 } else {
313 klassOop k = java_lang_Class::as_klassOop(element_mirror);
314 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) {
315 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
316 }
317 return oopFactory::new_objArray(k, length, THREAD);
318 }
319 }
322 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
323 assert(dim_array->is_typeArray(), "just checking");
324 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
326 if (element_mirror == NULL) {
327 THROW_0(vmSymbols::java_lang_NullPointerException());
328 }
330 int len = dim_array->length();
331 if (len <= 0 || len > MAX_DIM) {
332 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
333 }
335 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
336 for (int i = 0; i < len; i++) {
337 int d = dim_array->int_at(i);
338 if (d < 0) {
339 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
340 }
341 dimensions[i] = d;
342 }
344 klassOop klass;
345 int dim = len;
346 if (java_lang_Class::is_primitive(element_mirror)) {
347 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
348 } else {
349 klass = java_lang_Class::as_klassOop(element_mirror);
350 if (Klass::cast(klass)->oop_is_array()) {
351 int k_dim = arrayKlass::cast(klass)->dimension();
352 if (k_dim + len > MAX_DIM) {
353 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
354 }
355 dim += k_dim;
356 }
357 }
358 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL);
359 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD);
360 assert(obj->is_array(), "just checking");
361 return arrayOop(obj);
362 }
365 oop Reflection::array_component_type(oop mirror, TRAPS) {
366 if (java_lang_Class::is_primitive(mirror)) {
367 return NULL;
368 }
370 klassOop klass = java_lang_Class::as_klassOop(mirror);
371 if (!Klass::cast(klass)->oop_is_array()) {
372 return NULL;
373 }
375 oop result = arrayKlass::cast(klass)->component_mirror();
376 #ifdef ASSERT
377 oop result2 = NULL;
378 if (arrayKlass::cast(klass)->dimension() == 1) {
379 if (Klass::cast(klass)->oop_is_typeArray()) {
380 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
381 } else {
382 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror();
383 }
384 } else {
385 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension();
386 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking");
387 result2 = Klass::cast(lower_dim)->java_mirror();
388 }
389 assert(result == result2, "results must be consistent");
390 #endif //ASSERT
391 return result;
392 }
395 bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) {
396 // field_class : declaring class
397 // acc : declared field access
398 // target_class : for protected
400 // Check if field or method is accessible to client. Throw an
401 // IllegalAccessException and return false if not.
403 // The "client" is the class associated with the nearest real frame
404 // getCallerClass already skips Method.invoke frames, so pass 0 in
405 // that case (same as classic).
406 ResourceMark rm(THREAD);
407 assert(THREAD->is_Java_thread(), "sanity check");
408 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
410 if (client_class != field_class) {
411 if (!verify_class_access(client_class, field_class, false)
412 || !verify_field_access(client_class,
413 field_class,
414 field_class,
415 acc,
416 false)) {
417 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
418 }
419 }
421 // Additional test for protected members: JLS 6.6.2
423 if (acc.is_protected()) {
424 if (target_class != client_class) {
425 if (!is_same_class_package(client_class, field_class)) {
426 if (!Klass::cast(target_class)->is_subclass_of(client_class)) {
427 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
428 }
429 }
430 }
431 }
433 // Passed all tests
434 return true;
435 }
438 bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) {
439 // Verify that current_class can access new_class. If the classloader_only
440 // flag is set, we automatically allow any accesses in which current_class
441 // doesn't have a classloader.
442 if ((current_class == NULL) ||
443 (current_class == new_class) ||
444 (instanceKlass::cast(new_class)->is_public()) ||
445 is_same_class_package(current_class, new_class)) {
446 return true;
447 }
448 // New (1.4) reflection implementation. Allow all accesses from
449 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
450 if ( JDK_Version::is_gte_jdk14x_version()
451 && UseNewReflection
452 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
453 return true;
454 }
456 return can_relax_access_check_for(current_class, new_class, classloader_only);
457 }
459 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 }
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 }
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 (access.is_static() || // static fields are ok, see 6622385
504 current_class == resolved_class ||
505 field_class == resolved_class ||
506 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
507 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
508 return true;
509 }
510 }
511 }
512 }
514 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
515 return true;
516 }
518 // New (1.4) reflection implementation. Allow all accesses from
519 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
520 if ( JDK_Version::is_gte_jdk14x_version()
521 && UseNewReflection
522 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_magic_klass())) {
523 return true;
524 }
526 return can_relax_access_check_for(
527 current_class, field_class, classloader_only);
528 }
531 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
532 return instanceKlass::cast(class1)->is_same_class_package(class2);
533 }
536 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
537 // throw an incompatible class change exception
538 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, TRAPS) {
539 const int inner_class_info_index = 0;
540 const int outer_class_info_index = 1;
542 typeArrayHandle icls (THREAD, outer->inner_classes());
543 constantPoolHandle cp (THREAD, outer->constants());
544 for(int i = 0; i < icls->length(); i += 4) {
545 int ioff = icls->ushort_at(i + inner_class_info_index);
546 int ooff = icls->ushort_at(i + outer_class_info_index);
548 if (ioff != 0 && ooff != 0) {
549 klassOop o = cp->klass_at(ooff, CHECK);
550 if (o == outer()) {
551 klassOop i = cp->klass_at(ioff, CHECK);
552 if (i == inner()) {
553 return;
554 }
555 }
556 }
557 }
559 // 'inner' not declared as an inner klass in outer
560 ResourceMark rm(THREAD);
561 Exceptions::fthrow(
562 THREAD_AND_LOCATION,
563 vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
564 "%s and %s disagree on InnerClasses attribute",
565 outer->external_name(),
566 inner->external_name()
567 );
568 }
570 // Utility method converting a single SignatureStream element into java.lang.Class instance
572 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
573 switch (ss->type()) {
574 default:
575 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
576 return java_lang_Class::primitive_mirror(ss->type());
577 case T_OBJECT:
578 case T_ARRAY:
579 symbolOop name = ss->as_symbol(CHECK_NULL);
580 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
581 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
582 klassOop k = SystemDictionary::resolve_or_fail(
583 symbolHandle(THREAD, name),
584 Handle(THREAD, loader),
585 Handle(THREAD, protection_domain),
586 true, CHECK_NULL);
587 if (TraceClassResolution) {
588 trace_class_resolution(k);
589 }
590 return k->klass_part()->java_mirror();
591 };
592 }
595 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
596 // Allocate array holding parameter types (java.lang.Class instances)
597 objArrayOop m = oopFactory::new_objArray(SystemDictionary::class_klass(), parameter_count, CHECK_(objArrayHandle()));
598 objArrayHandle mirrors (THREAD, m);
599 int index = 0;
600 // Collect parameter types
601 symbolHandle signature (THREAD, method->signature());
602 SignatureStream ss(signature);
603 while (!ss.at_return_type()) {
604 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
605 mirrors->obj_at_put(index++, mirror);
606 ss.next();
607 }
608 assert(index == parameter_count, "invalid parameter count");
609 if (return_type != NULL) {
610 // Collect return type as well
611 assert(ss.at_return_type(), "return type should be present");
612 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
613 }
614 return mirrors;
615 }
617 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
618 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
619 }
622 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
623 // Basic types
624 BasicType type = vmSymbols::signature_type(signature());
625 if (type != T_OBJECT) {
626 return Handle(THREAD, Universe::java_mirror(type));
627 }
629 oop loader = instanceKlass::cast(k())->class_loader();
630 oop protection_domain = Klass::cast(k())->protection_domain();
631 klassOop result = SystemDictionary::resolve_or_fail(signature,
632 Handle(THREAD, loader),
633 Handle(THREAD, protection_domain),
634 true, CHECK_(Handle()));
636 if (TraceClassResolution) {
637 trace_class_resolution(result);
638 }
640 oop nt = Klass::cast(result)->java_mirror();
641 return Handle(THREAD, nt);
642 }
645 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
646 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
647 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
648 assert(!method()->is_initializer() ||
649 (for_constant_pool_access && method()->is_static()) ||
650 (method()->name() == vmSymbols::class_initializer_name()
651 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
652 instanceKlassHandle holder (THREAD, method->method_holder());
653 int slot = method->method_idnum();
655 symbolHandle signature (THREAD, method->signature());
656 int parameter_count = ArgumentCount(signature).size();
657 oop return_type_oop = NULL;
658 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
659 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
661 Handle return_type(THREAD, return_type_oop);
663 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
665 if (exception_types.is_null()) return NULL;
667 symbolHandle method_name(THREAD, method->name());
668 Handle name;
669 if (intern_name) {
670 // intern_name is only true with UseNewReflection
671 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
672 name = Handle(THREAD, name_oop);
673 } else {
674 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
675 }
676 if (name.is_null()) return NULL;
678 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
680 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
682 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
683 java_lang_reflect_Method::set_slot(mh(), slot);
684 java_lang_reflect_Method::set_name(mh(), name());
685 java_lang_reflect_Method::set_return_type(mh(), return_type());
686 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
687 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
688 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
689 java_lang_reflect_Method::set_override(mh(), false);
690 if (java_lang_reflect_Method::has_signature_field() &&
691 method->generic_signature() != NULL) {
692 symbolHandle gs(THREAD, method->generic_signature());
693 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
694 java_lang_reflect_Method::set_signature(mh(), sig());
695 }
696 if (java_lang_reflect_Method::has_annotations_field()) {
697 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
698 }
699 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
700 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
701 }
702 if (java_lang_reflect_Method::has_annotation_default_field()) {
703 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
704 }
705 return mh();
706 }
709 oop Reflection::new_constructor(methodHandle method, TRAPS) {
710 assert(method()->is_initializer(), "should call new_method instead");
712 instanceKlassHandle holder (THREAD, method->method_holder());
713 int slot = method->method_idnum();
715 symbolHandle signature (THREAD, method->signature());
716 int parameter_count = ArgumentCount(signature).size();
717 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
718 if (parameter_types.is_null()) return NULL;
720 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
721 if (exception_types.is_null()) return NULL;
723 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
725 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
727 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
728 java_lang_reflect_Constructor::set_slot(ch(), slot);
729 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
730 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
731 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
732 java_lang_reflect_Constructor::set_override(ch(), false);
733 if (java_lang_reflect_Constructor::has_signature_field() &&
734 method->generic_signature() != NULL) {
735 symbolHandle gs(THREAD, method->generic_signature());
736 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
737 java_lang_reflect_Constructor::set_signature(ch(), sig());
738 }
739 if (java_lang_reflect_Constructor::has_annotations_field()) {
740 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
741 }
742 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
743 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
744 }
745 return ch();
746 }
749 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
750 symbolHandle field_name(THREAD, fd->name());
751 Handle name;
752 if (intern_name) {
753 // intern_name is only true with UseNewReflection
754 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
755 name = Handle(THREAD, name_oop);
756 } else {
757 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
758 }
759 symbolHandle signature (THREAD, fd->signature());
760 KlassHandle holder (THREAD, fd->field_holder());
761 Handle type = new_type(signature, holder, CHECK_NULL);
762 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
764 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
765 java_lang_reflect_Field::set_slot(rh(), fd->index());
766 java_lang_reflect_Field::set_name(rh(), name());
767 java_lang_reflect_Field::set_type(rh(), type());
768 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
769 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
770 java_lang_reflect_Field::set_override(rh(), false);
771 if (java_lang_reflect_Field::has_signature_field() &&
772 fd->generic_signature() != NULL) {
773 symbolHandle gs(THREAD, fd->generic_signature());
774 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
775 java_lang_reflect_Field::set_signature(rh(), sig());
776 }
777 if (java_lang_reflect_Field::has_annotations_field()) {
778 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
779 }
780 return rh();
781 }
784 //---------------------------------------------------------------------------
785 //
786 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
787 //
788 // See reflection.hpp for details.
789 //
790 //---------------------------------------------------------------------------
792 #ifdef SUPPORT_OLD_REFLECTION
794 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
795 KlassHandle recv_klass, Handle receiver, TRAPS) {
796 assert(!method.is_null() , "method should not be null");
798 CallInfo info;
799 symbolHandle signature (THREAD, method->signature());
800 symbolHandle name (THREAD, method->name());
801 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
802 name, signature,
803 KlassHandle(), false, true,
804 CHECK_(methodHandle()));
805 return info.selected_method();
806 }
809 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
810 Handle receiver, bool override, objArrayHandle ptypes,
811 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
812 ResourceMark rm(THREAD);
814 methodHandle method; // actual method to invoke
815 KlassHandle target_klass; // target klass, receiver's klass for non-static
817 // Ensure klass is initialized
818 klass->initialize(CHECK_NULL);
820 bool is_static = reflected_method->is_static();
821 if (is_static) {
822 // ignore receiver argument
823 method = reflected_method;
824 target_klass = klass;
825 } else {
826 // check for null receiver
827 if (receiver.is_null()) {
828 THROW_0(vmSymbols::java_lang_NullPointerException());
829 }
830 // Check class of receiver against class declaring method
831 if (!receiver->is_a(klass())) {
832 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
833 }
834 // target klass is receiver's klass
835 target_klass = KlassHandle(THREAD, receiver->klass());
836 // no need to resolve if method is private or <init>
837 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
838 method = reflected_method;
839 } else {
840 // resolve based on the receiver
841 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
842 // resolve interface call
843 if (ReflectionWrapResolutionErrors) {
844 // new default: 6531596
845 // Match resolution errors with those thrown due to reflection inlining
846 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
847 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
848 if (HAS_PENDING_EXCEPTION) {
849 // Method resolution threw an exception; wrap it in an InvocationTargetException
850 oop resolution_exception = PENDING_EXCEPTION;
851 CLEAR_PENDING_EXCEPTION;
852 JavaCallArguments args(Handle(THREAD, resolution_exception));
853 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
854 vmSymbolHandles::throwable_void_signature(),
855 &args);
856 }
857 } else {
858 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
859 }
860 } else {
861 // if the method can be overridden, we resolve using the vtable index.
862 int index = reflected_method->vtable_index();
863 method = reflected_method;
864 if (index != methodOopDesc::nonvirtual_vtable_index) {
865 // target_klass might be an arrayKlassOop but all vtables start at
866 // the same place. The cast is to avoid virtual call and assertion.
867 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
868 method = methodHandle(THREAD, inst->method_at_vtable(index));
869 }
870 if (!method.is_null()) {
871 // Check for abstract methods as well
872 if (method->is_abstract()) {
873 // new default: 6531596
874 if (ReflectionWrapResolutionErrors) {
875 ResourceMark rm(THREAD);
876 Handle h_origexception = Exceptions::new_exception(THREAD,
877 vmSymbols::java_lang_AbstractMethodError(),
878 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
879 method->name(),
880 method->signature()));
881 JavaCallArguments args(h_origexception);
882 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
883 vmSymbolHandles::throwable_void_signature(),
884 &args);
885 } else {
886 ResourceMark rm(THREAD);
887 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
888 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
889 method->name(),
890 method->signature()));
891 }
892 }
893 }
894 }
895 }
896 }
898 // I believe this is a ShouldNotGetHere case which requires
899 // an internal vtable bug. If you ever get this please let Karen know.
900 if (method.is_null()) {
901 ResourceMark rm(THREAD);
902 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
903 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
904 reflected_method->name(),
905 reflected_method->signature()));
906 }
908 // In the JDK 1.4 reflection implementation, the security check is
909 // done at the Java level
910 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
912 // Access checking (unless overridden by Method)
913 if (!override) {
914 if (!(klass->is_public() && reflected_method->is_public())) {
915 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
916 if (!access) {
917 return NULL; // exception
918 }
919 }
920 }
922 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
924 assert(ptypes->is_objArray(), "just checking");
925 int args_len = args.is_null() ? 0 : args->length();
926 // Check number of arguments
927 if (ptypes->length() != args_len) {
928 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
929 }
931 // Create object to contain parameters for the JavaCall
932 JavaCallArguments java_args(method->size_of_parameters());
934 if (!is_static) {
935 java_args.push_oop(receiver);
936 }
938 for (int i = 0; i < args_len; i++) {
939 oop type_mirror = ptypes->obj_at(i);
940 oop arg = args->obj_at(i);
941 if (java_lang_Class::is_primitive(type_mirror)) {
942 jvalue value;
943 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
944 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
945 if (ptype != atype) {
946 widen(&value, atype, ptype, CHECK_NULL);
947 }
948 switch (ptype) {
949 case T_BOOLEAN: java_args.push_int(value.z); break;
950 case T_CHAR: java_args.push_int(value.c); break;
951 case T_BYTE: java_args.push_int(value.b); break;
952 case T_SHORT: java_args.push_int(value.s); break;
953 case T_INT: java_args.push_int(value.i); break;
954 case T_LONG: java_args.push_long(value.j); break;
955 case T_FLOAT: java_args.push_float(value.f); break;
956 case T_DOUBLE: java_args.push_double(value.d); break;
957 default:
958 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
959 }
960 } else {
961 if (arg != NULL) {
962 klassOop k = java_lang_Class::as_klassOop(type_mirror);
963 if (!arg->is_a(k)) {
964 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
965 }
966 }
967 Handle arg_handle(THREAD, arg); // Create handle for argument
968 java_args.push_oop(arg_handle); // Push handle
969 }
970 }
972 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
974 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
975 // oop (i.e., NOT as an handle)
976 JavaValue result(rtype);
977 JavaCalls::call(&result, method, &java_args, THREAD);
979 if (HAS_PENDING_EXCEPTION) {
980 // Method threw an exception; wrap it in an InvocationTargetException
981 oop target_exception = PENDING_EXCEPTION;
982 CLEAR_PENDING_EXCEPTION;
983 JavaCallArguments args(Handle(THREAD, target_exception));
984 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
985 vmSymbolHandles::throwable_void_signature(),
986 &args);
987 } else {
988 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
989 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
990 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
991 }
992 }
995 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
996 switch (narrow_type) {
997 case T_BOOLEAN:
998 value->z = (jboolean) value->i;
999 return;
1000 case T_BYTE:
1001 value->b = (jbyte) value->i;
1002 return;
1003 case T_CHAR:
1004 value->c = (jchar) value->i;
1005 return;
1006 case T_SHORT:
1007 value->s = (jshort) value->i;
1008 return;
1009 default:
1010 break; // fail
1011 }
1012 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1013 }
1016 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1017 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1018 return java_lang_Class::primitive_type(basic_type_mirror);
1019 }
1022 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1023 int types_len = types.is_null() ? 0 : types->length();
1024 if (types_len != parameter_count) return false;
1025 if (parameter_count > 0) {
1026 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1027 for (int index = 0; index < parameter_count; index++) {
1028 if (types->obj_at(index) != method_types->obj_at(index)) {
1029 return false;
1030 }
1031 }
1032 }
1033 return true;
1034 }
1037 oop Reflection::new_field(FieldStream* st, TRAPS) {
1038 symbolHandle field_name(THREAD, st->name());
1039 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1040 symbolHandle signature(THREAD, st->signature());
1041 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1042 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1043 oop result = rh();
1045 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1046 java_lang_reflect_Field::set_slot(result, st->index());
1047 java_lang_reflect_Field::set_name(result, name());
1048 java_lang_reflect_Field::set_type(result, type());
1049 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1050 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1051 java_lang_reflect_Field::set_override(result, false);
1052 return result;
1053 }
1056 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1057 if (field_mirror.is_null()) {
1058 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1059 }
1061 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1062 int slot = java_lang_reflect_Field::slot(field_mirror());
1064 // Ensure klass is initialized
1065 klass->initialize(CHECK_false);
1066 fd->initialize(klass(), slot);
1068 bool is_static = fd->is_static();
1069 KlassHandle receiver_klass;
1071 if (is_static) {
1072 receiver = KlassHandle(THREAD, klass());
1073 receiver_klass = klass;
1074 } else {
1075 // Check object is a non-null instance of declaring class
1076 if (receiver.is_null()) {
1077 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1078 }
1079 if (!receiver->is_a(klass())) {
1080 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1081 }
1082 receiver_klass = KlassHandle(THREAD, receiver->klass());
1083 }
1085 // Access checking (unless overridden by Field)
1086 if (!java_lang_reflect_Field::override(field_mirror())) {
1087 if (!(klass->is_public() && fd->is_public())) {
1088 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1089 if (!access_check) {
1090 return false; // exception
1091 }
1092 }
1093 }
1095 if (check_final && fd->is_final()) {
1096 // In 1.3 we always throw an error when attempting to set a final field.
1097 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1098 // We currently maintain backwards compatibility. See bug 4250960.
1099 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1100 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1101 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1102 }
1103 }
1104 return true;
1105 }
1108 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1109 BasicType field_type = fd->field_type();
1110 int offset = fd->offset();
1111 switch (field_type) {
1112 case T_BOOLEAN:
1113 value->z = receiver->bool_field(offset);
1114 break;
1115 case T_CHAR:
1116 value->c = receiver->char_field(offset);
1117 break;
1118 case T_FLOAT:
1119 value->f = receiver->float_field(offset);
1120 break;
1121 case T_DOUBLE:
1122 value->d = receiver->double_field(offset);
1123 break;
1124 case T_BYTE:
1125 value->b = receiver->byte_field(offset);
1126 break;
1127 case T_SHORT:
1128 value->s = receiver->short_field(offset);
1129 break;
1130 case T_INT:
1131 value->i = receiver->int_field(offset);
1132 break;
1133 case T_LONG:
1134 value->j = receiver->long_field(offset);
1135 break;
1136 case T_OBJECT:
1137 case T_ARRAY:
1138 value->l = (jobject) receiver->obj_field(offset);
1139 break;
1140 default:
1141 return T_ILLEGAL;
1142 }
1143 return field_type;
1144 }
1147 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1148 BasicType field_type = fd->field_type();
1149 if (field_type != value_type) {
1150 widen(value, value_type, field_type, CHECK);
1151 }
1153 int offset = fd->offset();
1154 switch (field_type) {
1155 case T_BOOLEAN:
1156 receiver->bool_field_put(offset, value->z);
1157 break;
1158 case T_CHAR:
1159 receiver->char_field_put(offset, value->c);
1160 break;
1161 case T_FLOAT:
1162 receiver->float_field_put(offset, value->f);
1163 break;
1164 case T_DOUBLE:
1165 receiver->double_field_put(offset, value->d);
1166 break;
1167 case T_BYTE:
1168 receiver->byte_field_put(offset, value->b);
1169 break;
1170 case T_SHORT:
1171 receiver->short_field_put(offset, value->s);
1172 break;
1173 case T_INT:
1174 receiver->int_field_put(offset, value->i);
1175 break;
1176 case T_LONG:
1177 receiver->long_field_put(offset, value->j);
1178 break;
1179 case T_OBJECT:
1180 case T_ARRAY: {
1181 Handle obj(THREAD, (oop) value->l);
1182 if (obj.not_null()) {
1183 symbolHandle signature(THREAD, fd->signature());
1184 Handle loader (THREAD, fd->loader());
1185 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1186 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1187 if (!obj->is_a(k)) {
1188 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1189 }
1190 }
1191 receiver->obj_field_put(offset, obj());
1192 break;
1193 }
1194 default:
1195 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1196 }
1197 }
1200 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1201 // Exclude primitive types and array types
1202 if (java_lang_Class::is_primitive(mirror)) return NULL;
1203 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1205 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1206 bool local_fields_only = (which == DECLARED);
1208 // Ensure class is linked
1209 k->link_class(CHECK_NULL);
1211 // Search class and interface fields
1212 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1213 if (st.name() == field_name) {
1214 if (local_fields_only || st.access_flags().is_public()) {
1215 return new_field(&st, THREAD);
1216 }
1217 }
1218 }
1220 return NULL;
1221 }
1224 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1225 // Exclude primitive types and array types
1226 if (java_lang_Class::is_primitive(mirror)
1227 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1228 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1229 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1230 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1231 }
1233 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1235 // Ensure class is linked
1236 k->link_class(CHECK_NULL);
1238 bool local_fields_only = (which == DECLARED);
1239 int count = 0;
1240 { // Compute fields count for class and interface fields
1241 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1242 if (local_fields_only || st.access_flags().is_public()) {
1243 count++;
1244 }
1245 }
1246 }
1248 // Allocate result
1249 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1250 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1251 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1252 objArrayHandle result (THREAD, r);
1254 // Fill in results backwards
1255 {
1256 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1257 if (local_fields_only || st.access_flags().is_public()) {
1258 oop field = new_field(&st, CHECK_NULL);
1259 result->obj_at_put(--count, field);
1260 }
1261 }
1262 assert(count == 0, "just checking");
1263 }
1264 return result();
1265 }
1268 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1269 if (java_lang_Class::is_primitive(mirror)) return NULL;
1270 klassOop klass = java_lang_Class::as_klassOop(mirror);
1271 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1273 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1274 klass = SystemDictionary::object_klass();
1275 }
1276 instanceKlassHandle h_k(THREAD, klass);
1278 // Ensure klass is linked (need not be initialized)
1279 h_k->link_class(CHECK_NULL);
1281 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1282 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1284 switch (which) {
1285 case MEMBER_PUBLIC:
1286 // First the public non-static methods (works if method holder is an interface)
1287 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1288 {
1289 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1290 methodHandle m(THREAD, st.method());
1291 // For interfaces include static initializers since classic does that!
1292 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1293 symbolHandle signature(THREAD, m->signature());
1294 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1295 if (parameter_match) {
1296 return new_method(m, false, false, THREAD);
1297 }
1298 }
1299 }
1300 }
1301 // Then the public static methods (works if method holder is an interface)
1302 {
1303 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1304 methodHandle m(THREAD, st.method());
1305 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1306 symbolHandle signature(THREAD, m->signature());
1307 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1308 if (parameter_match) {
1309 return new_method(m, false, false, THREAD);
1310 }
1311 }
1312 }
1313 }
1314 break;
1315 case MEMBER_DECLARED:
1316 // All local methods
1317 {
1318 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1319 methodHandle m(THREAD, st.method());
1320 if (method_name() == m->name() && !m->is_initializer()) {
1321 symbolHandle signature(THREAD, m->signature());
1322 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1323 if (parameter_match) {
1324 return new_method(m, false, false, THREAD);
1325 }
1326 }
1327 }
1328 }
1329 break;
1330 default:
1331 break;
1332 }
1333 return NULL;
1334 }
1337 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1338 // Exclude primitive types
1339 if (java_lang_Class::is_primitive(mirror) ||
1340 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1341 klassOop klass = SystemDictionary::reflect_method_klass();
1342 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1343 }
1345 klassOop klass = java_lang_Class::as_klassOop(mirror);
1346 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1347 klass = SystemDictionary::object_klass();
1348 }
1349 instanceKlassHandle h_k(THREAD, klass);
1351 // Ensure klass is linked (need not be initialized)
1352 h_k->link_class(CHECK_NULL);
1354 // We search the (super)interfaces only if h_k is an interface itself
1355 bool is_interface = h_k->is_interface();
1357 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1358 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1360 switch (which) {
1361 case MEMBER_PUBLIC:
1362 {
1364 // Count public methods (non-static and static)
1365 int count = 0;
1366 {
1367 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1368 methodOop m = st.method();
1369 // For interfaces include static initializers since classic does that!
1370 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1371 count++;
1372 }
1373 }
1374 }
1376 // Allocate result
1377 klassOop klass = SystemDictionary::reflect_method_klass();
1378 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1379 objArrayHandle h_result (THREAD, r);
1381 // Fill in results backwards
1382 {
1383 // First the non-static public methods
1384 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1385 methodHandle m (THREAD, st.method());
1386 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1387 oop method = new_method(m, false, false, CHECK_NULL);
1388 if (method == NULL) {
1389 return NULL;
1390 } else {
1391 h_result->obj_at_put(--count, method);
1392 }
1393 }
1394 }
1395 }
1396 {
1397 // Then the static public methods
1398 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1399 methodHandle m (THREAD, st.method());
1400 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1401 oop method = new_method(m, false, false, CHECK_NULL);
1402 if (method == NULL) {
1403 return NULL;
1404 } else {
1405 h_result->obj_at_put(--count, method);
1406 }
1407 }
1408 }
1409 }
1411 assert(count == 0, "just checking");
1412 return h_result();
1413 }
1415 case MEMBER_DECLARED:
1416 {
1417 // Count all methods
1418 int count = 0;
1419 {
1420 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1421 methodOop m = st.method();
1422 if (!m->is_initializer()) {
1423 count++;
1424 }
1425 }
1426 }
1427 // Allocate result
1428 klassOop klass = SystemDictionary::reflect_method_klass();
1429 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1430 objArrayHandle h_result (THREAD, r);
1432 // Fill in results backwards
1433 {
1434 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1435 methodHandle m (THREAD, st.method());
1436 if (!m->is_initializer()) {
1437 oop method = new_method(m, false, false, CHECK_NULL);
1438 if (method == NULL) {
1439 return NULL;
1440 } else {
1441 h_result->obj_at_put(--count, method);
1442 }
1443 }
1444 }
1445 }
1446 assert(count == 0, "just checking");
1447 return h_result();
1448 }
1449 }
1450 ShouldNotReachHere();
1451 return NULL;
1452 }
1455 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1457 // Exclude primitive, interface and array types
1458 bool prim = java_lang_Class::is_primitive(mirror);
1459 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1460 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1462 // Must be instance klass
1463 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1465 // Ensure klass is linked (need not be initialized)
1466 h_k->link_class(CHECK_NULL);
1468 bool local_only = (which == MEMBER_DECLARED);
1469 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1470 methodHandle m(THREAD, st.method());
1471 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1472 symbolHandle signature(THREAD, m->signature());
1473 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1474 if (parameter_match) {
1475 return new_constructor(m, THREAD);
1476 }
1477 }
1478 }
1480 return NULL;
1481 }
1484 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1485 // Exclude primitive, interface and array types
1486 bool prim = java_lang_Class::is_primitive(mirror);
1487 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1488 if (prim || k->is_interface() || k->oop_is_array()) {
1489 return oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0, CHECK_NULL); // Return empty array
1490 }
1492 // Must be instanceKlass at this point
1493 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1495 // Ensure klass is linked (need not be initialized)
1496 h_k->link_class(CHECK_NULL);
1498 bool local_only = (which == MEMBER_DECLARED);
1499 int count = 0;
1500 {
1501 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1502 methodOop m = st.method();
1503 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1504 count++;
1505 }
1506 }
1507 }
1509 // Allocate result
1510 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1511 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1512 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1513 objArrayHandle h_result (THREAD, r);
1515 // Fill in results backwards
1516 {
1517 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1518 methodHandle m (THREAD, st.method());
1519 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1520 oop constr = new_constructor(m, CHECK_NULL);
1521 if (constr == NULL) {
1522 return NULL;
1523 } else {
1524 h_result->obj_at_put(--count, constr);
1525 }
1526 }
1527 }
1528 assert(count == 0, "just checking");
1529 }
1530 return h_result();
1531 }
1534 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1535 // of java.lang.reflect.Constructor
1537 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1538 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1539 int slot = java_lang_reflect_Method::slot(method_mirror);
1540 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1541 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1543 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1544 BasicType rtype;
1545 if (java_lang_Class::is_primitive(return_type_mirror)) {
1546 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1547 } else {
1548 rtype = T_OBJECT;
1549 }
1551 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1552 methodOop m = klass->method_with_idnum(slot);
1553 if (m == NULL) {
1554 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1555 }
1556 methodHandle method(THREAD, m);
1558 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1559 }
1562 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1563 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1564 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1565 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1566 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1568 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1569 methodOop m = klass->method_with_idnum(slot);
1570 if (m == NULL) {
1571 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1572 }
1573 methodHandle method(THREAD, m);
1574 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1576 // Make sure klass gets initialize
1577 klass->initialize(CHECK_NULL);
1579 // Create new instance (the receiver)
1580 klass->check_valid_for_instantiation(false, CHECK_NULL);
1581 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1583 // Ignore result from call and return receiver
1584 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1585 return receiver();
1586 }
1589 #endif /* SUPPORT_OLD_REFLECTION */
