1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/verifier.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "prims/jvm.h"
39 #include "prims/methodHandleWalk.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/handles.inline.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/reflection.hpp"
44 #include "runtime/reflectionUtils.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/vframe.hpp"
47
48 #define JAVA_1_5_VERSION 49
49
50 static void trace_class_resolution(klassOop to_class) {
51 ResourceMark rm;
52 int line_number = -1;
53 const char * source_file = NULL;
54 klassOop caller = NULL;
55 JavaThread* jthread = JavaThread::current();
56 if (jthread->has_last_Java_frame()) {
57 vframeStream vfst(jthread);
58 // skip over any frames belonging to java.lang.Class
59 while (!vfst.at_end() &&
60 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) {
61 vfst.next();
62 }
63 if (!vfst.at_end()) {
64 // this frame is a likely suspect
65 caller = vfst.method()->method_holder();
66 line_number = vfst.method()->line_number_from_bci(vfst.bci());
67 Symbol* s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
68 if (s != NULL) {
69 source_file = s->as_C_string();
70 }
71 }
72 }
73 if (caller != NULL) {
74 const char * from = Klass::cast(caller)->external_name();
75 const char * to = Klass::cast(to_class)->external_name();
76 // print in a single call to reduce interleaving between threads
77 if (source_file != NULL) {
78 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
79 } else {
80 tty->print("RESOLVE %s %s (reflection)\n", from, to);
81 }
82 }
83 }
84
85
86 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
87 if (type == T_VOID) {
88 return NULL;
89 }
90 if (type == T_OBJECT || type == T_ARRAY) {
91 // regular objects are not boxed
92 return (oop) value->l;
93 }
94 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
95 if (result == NULL) {
96 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
97 }
98 return result;
99 }
100
101
102 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
103 if (box == NULL) {
104 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
105 }
106 return java_lang_boxing_object::get_value(box, value);
107 }
108
109 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
110 // Note: box is really the unboxed oop. It might even be a Short, etc.!
111 value->l = (jobject) box;
112 return T_OBJECT;
113 }
114
115
116 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
117 assert(wide_type != current_type, "widen should not be called with identical types");
118 switch (wide_type) {
119 case T_BOOLEAN:
120 case T_BYTE:
121 case T_CHAR:
122 break; // fail
123 case T_SHORT:
124 switch (current_type) {
125 case T_BYTE:
126 value->s = (jshort) value->b;
127 return;
128 }
129 break; // fail
130 case T_INT:
131 switch (current_type) {
132 case T_BYTE:
133 value->i = (jint) value->b;
134 return;
135 case T_CHAR:
136 value->i = (jint) value->c;
137 return;
138 case T_SHORT:
139 value->i = (jint) value->s;
140 return;
141 }
142 break; // fail
143 case T_LONG:
144 switch (current_type) {
145 case T_BYTE:
146 value->j = (jlong) value->b;
147 return;
148 case T_CHAR:
149 value->j = (jlong) value->c;
150 return;
151 case T_SHORT:
152 value->j = (jlong) value->s;
153 return;
154 case T_INT:
155 value->j = (jlong) value->i;
156 return;
157 }
158 break; // fail
159 case T_FLOAT:
160 switch (current_type) {
161 case T_BYTE:
162 value->f = (jfloat) value->b;
163 return;
164 case T_CHAR:
165 value->f = (jfloat) value->c;
166 return;
167 case T_SHORT:
168 value->f = (jfloat) value->s;
169 return;
170 case T_INT:
171 value->f = (jfloat) value->i;
172 return;
173 case T_LONG:
174 value->f = (jfloat) value->j;
175 return;
176 }
177 break; // fail
178 case T_DOUBLE:
179 switch (current_type) {
180 case T_BYTE:
181 value->d = (jdouble) value->b;
182 return;
183 case T_CHAR:
184 value->d = (jdouble) value->c;
185 return;
186 case T_SHORT:
187 value->d = (jdouble) value->s;
188 return;
189 case T_INT:
190 value->d = (jdouble) value->i;
191 return;
192 case T_FLOAT:
193 value->d = (jdouble) value->f;
194 return;
195 case T_LONG:
196 value->d = (jdouble) value->j;
197 return;
198 }
199 break; // fail
200 default:
201 break; // fail
202 }
203 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
204 }
205
206
207 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
208 if (!a->is_within_bounds(index)) {
209 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
210 }
211 if (a->is_objArray()) {
212 value->l = (jobject) objArrayOop(a)->obj_at(index);
213 return T_OBJECT;
214 } else {
215 assert(a->is_typeArray(), "just checking");
216 BasicType type = typeArrayKlass::cast(a->klass())->element_type();
217 switch (type) {
218 case T_BOOLEAN:
219 value->z = typeArrayOop(a)->bool_at(index);
220 break;
221 case T_CHAR:
222 value->c = typeArrayOop(a)->char_at(index);
223 break;
224 case T_FLOAT:
225 value->f = typeArrayOop(a)->float_at(index);
226 break;
227 case T_DOUBLE:
228 value->d = typeArrayOop(a)->double_at(index);
229 break;
230 case T_BYTE:
231 value->b = typeArrayOop(a)->byte_at(index);
232 break;
233 case T_SHORT:
234 value->s = typeArrayOop(a)->short_at(index);
235 break;
236 case T_INT:
237 value->i = typeArrayOop(a)->int_at(index);
238 break;
239 case T_LONG:
240 value->j = typeArrayOop(a)->long_at(index);
241 break;
242 default:
243 return T_ILLEGAL;
244 }
245 return type;
246 }
247 }
248
249
250 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
251 if (!a->is_within_bounds(index)) {
252 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
253 }
254 if (a->is_objArray()) {
255 if (value_type == T_OBJECT) {
256 oop obj = (oop) value->l;
257 if (obj != NULL) {
258 klassOop element_klass = objArrayKlass::cast(a->klass())->element_klass();
259 if (!obj->is_a(element_klass)) {
260 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
261 }
262 }
263 objArrayOop(a)->obj_at_put(index, obj);
264 }
265 } else {
266 assert(a->is_typeArray(), "just checking");
267 BasicType array_type = typeArrayKlass::cast(a->klass())->element_type();
268 if (array_type != value_type) {
269 // The widen operation can potentially throw an exception, but cannot block,
270 // so typeArrayOop a is safe if the call succeeds.
271 widen(value, value_type, array_type, CHECK);
272 }
273 switch (array_type) {
274 case T_BOOLEAN:
275 typeArrayOop(a)->bool_at_put(index, value->z);
276 break;
277 case T_CHAR:
278 typeArrayOop(a)->char_at_put(index, value->c);
279 break;
280 case T_FLOAT:
281 typeArrayOop(a)->float_at_put(index, value->f);
282 break;
283 case T_DOUBLE:
284 typeArrayOop(a)->double_at_put(index, value->d);
285 break;
286 case T_BYTE:
287 typeArrayOop(a)->byte_at_put(index, value->b);
288 break;
289 case T_SHORT:
290 typeArrayOop(a)->short_at_put(index, value->s);
291 break;
292 case T_INT:
293 typeArrayOop(a)->int_at_put(index, value->i);
294 break;
295 case T_LONG:
296 typeArrayOop(a)->long_at_put(index, value->j);
297 break;
298 default:
299 THROW(vmSymbols::java_lang_IllegalArgumentException());
300 }
301 }
302 }
303
304
305 klassOop Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
306 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
307 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
308 if (type == T_VOID) {
309 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
310 } else {
311 return Universe::typeArrayKlassObj(type);
312 }
313 }
314
315
316 oop Reflection:: basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS) {
317 BasicType type = typeArrayKlass::cast(basic_type_arrayklass)->element_type();
318 return Universe::java_mirror(type);
319 }
320
321
322 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
323 if (element_mirror == NULL) {
324 THROW_0(vmSymbols::java_lang_NullPointerException());
325 }
326 if (length < 0) {
327 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
328 }
329 if (java_lang_Class::is_primitive(element_mirror)) {
330 klassOop tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
331 return typeArrayKlass::cast(tak)->allocate(length, THREAD);
332 } else {
333 klassOop k = java_lang_Class::as_klassOop(element_mirror);
334 if (Klass::cast(k)->oop_is_array() && arrayKlass::cast(k)->dimension() >= MAX_DIM) {
335 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
336 }
337 return oopFactory::new_objArray(k, length, THREAD);
338 }
339 }
340
341
342 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
343 assert(dim_array->is_typeArray(), "just checking");
344 assert(typeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
345
346 if (element_mirror == NULL) {
347 THROW_0(vmSymbols::java_lang_NullPointerException());
348 }
349
350 int len = dim_array->length();
351 if (len <= 0 || len > MAX_DIM) {
352 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
353 }
354
355 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
356 for (int i = 0; i < len; i++) {
357 int d = dim_array->int_at(i);
358 if (d < 0) {
359 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
360 }
361 dimensions[i] = d;
362 }
363
364 klassOop klass;
365 int dim = len;
366 if (java_lang_Class::is_primitive(element_mirror)) {
367 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
368 } else {
369 klass = java_lang_Class::as_klassOop(element_mirror);
370 if (Klass::cast(klass)->oop_is_array()) {
371 int k_dim = arrayKlass::cast(klass)->dimension();
372 if (k_dim + len > MAX_DIM) {
373 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
374 }
375 dim += k_dim;
376 }
377 }
378 klass = Klass::cast(klass)->array_klass(dim, CHECK_NULL);
379 oop obj = arrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD);
380 assert(obj->is_array(), "just checking");
381 return arrayOop(obj);
382 }
383
384
385 oop Reflection::array_component_type(oop mirror, TRAPS) {
386 if (java_lang_Class::is_primitive(mirror)) {
387 return NULL;
388 }
389
390 klassOop klass = java_lang_Class::as_klassOop(mirror);
391 if (!Klass::cast(klass)->oop_is_array()) {
392 return NULL;
393 }
394
395 oop result = arrayKlass::cast(klass)->component_mirror();
396 #ifdef ASSERT
397 oop result2 = NULL;
398 if (arrayKlass::cast(klass)->dimension() == 1) {
399 if (Klass::cast(klass)->oop_is_typeArray()) {
400 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
401 } else {
402 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror();
403 }
404 } else {
405 klassOop lower_dim = arrayKlass::cast(klass)->lower_dimension();
406 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking");
407 result2 = Klass::cast(lower_dim)->java_mirror();
408 }
409 assert(result == result2, "results must be consistent");
410 #endif //ASSERT
411 return result;
412 }
413
414
415 bool Reflection::reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS) {
416 // field_class : declaring class
417 // acc : declared field access
418 // target_class : for protected
419
420 // Check if field or method is accessible to client. Throw an
421 // IllegalAccessException and return false if not.
422
423 // The "client" is the class associated with the nearest real frame
424 // getCallerClass already skips Method.invoke frames, so pass 0 in
425 // that case (same as classic).
426 ResourceMark rm(THREAD);
427 assert(THREAD->is_Java_thread(), "sanity check");
428 klassOop client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
429
430 if (client_class != field_class) {
431 if (!verify_class_access(client_class, field_class, false)
432 || !verify_field_access(client_class,
433 field_class,
434 field_class,
435 acc,
436 false)) {
437 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
438 }
439 }
440
441 // Additional test for protected members: JLS 6.6.2
442
443 if (acc.is_protected()) {
444 if (target_class != client_class) {
445 if (!is_same_class_package(client_class, field_class)) {
446 if (!Klass::cast(target_class)->is_subclass_of(client_class)) {
447 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
448 }
449 }
450 }
451 }
452
453 // Passed all tests
454 return true;
455 }
456
457
458 bool Reflection::verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only) {
459 // Verify that current_class can access new_class. If the classloader_only
460 // flag is set, we automatically allow any accesses in which current_class
461 // doesn't have a classloader.
462 if ((current_class == NULL) ||
463 (current_class == new_class) ||
464 (instanceKlass::cast(new_class)->is_public()) ||
465 is_same_class_package(current_class, new_class)) {
466 return true;
467 }
468 // New (1.4) reflection implementation. Allow all accesses from
469 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
470 if ( JDK_Version::is_gte_jdk14x_version()
471 && UseNewReflection
472 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
473 return true;
474 }
475
476 return can_relax_access_check_for(current_class, new_class, classloader_only);
477 }
478
479 static bool under_host_klass(instanceKlass* ik, klassOop host_klass) {
480 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
481 for (;;) {
482 klassOop hc = (klassOop) ik->host_klass();
483 if (hc == NULL) return false;
484 if (hc == host_klass) return true;
485 ik = instanceKlass::cast(hc);
486
487 // There's no way to make a host class loop short of patching memory.
488 // Therefore there cannot be a loop here unles there's another bug.
489 // Still, let's check for it.
490 assert(--inf_loop_check > 0, "no host_klass loop");
491 }
492 }
493
494 bool Reflection::can_relax_access_check_for(
495 klassOop accessor, klassOop accessee, bool classloader_only) {
496 instanceKlass* accessor_ik = instanceKlass::cast(accessor);
497 instanceKlass* accessee_ik = instanceKlass::cast(accessee);
498
499 // If either is on the other's host_klass chain, access is OK,
500 // because one is inside the other.
501 if (under_host_klass(accessor_ik, accessee) ||
502 under_host_klass(accessee_ik, accessor))
503 return true;
504
505 // Adapter frames can access anything.
506 if (MethodHandleCompiler::klass_is_method_handle_adapter_holder(accessor))
507 // This is an internal adapter frame from the MethodHandleCompiler.
508 return true;
509
510 if (RelaxAccessControlCheck ||
511 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
512 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
513 return classloader_only &&
514 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
515 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
516 accessor_ik->class_loader() == accessee_ik->class_loader();
517 } else {
518 return false;
519 }
520 }
521
522 bool Reflection::verify_field_access(klassOop current_class,
523 klassOop resolved_class,
524 klassOop field_class,
525 AccessFlags access,
526 bool classloader_only,
527 bool protected_restriction) {
528 // Verify that current_class can access a field of field_class, where that
529 // field's access bits are "access". We assume that we've already verified
530 // that current_class can access field_class.
531 //
532 // If the classloader_only flag is set, we automatically allow any accesses
533 // in which current_class doesn't have a classloader.
534 //
535 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
536 // need this distinction (e.g. if all we have is the runtime type, or during
537 // class file parsing when we only care about the static type); in that case
538 // callers should ensure that resolved_class == field_class.
539 //
540 if ((current_class == NULL) ||
541 (current_class == field_class) ||
542 access.is_public()) {
543 return true;
544 }
545
546 if (access.is_protected()) {
547 if (!protected_restriction) {
548 // See if current_class is a subclass of field_class
549 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
550 if (access.is_static() || // static fields are ok, see 6622385
551 current_class == resolved_class ||
552 field_class == resolved_class ||
553 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
554 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
555 return true;
556 }
557 }
558 }
559 }
560
561 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
562 return true;
563 }
564
565 // New (1.4) reflection implementation. Allow all accesses from
566 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
567 if ( JDK_Version::is_gte_jdk14x_version()
568 && UseNewReflection
569 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
570 return true;
571 }
572
573 return can_relax_access_check_for(
574 current_class, field_class, classloader_only);
575 }
576
577
578 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
579 return instanceKlass::cast(class1)->is_same_class_package(class2);
580 }
581
582 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) {
583 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
584 }
585
586
587 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
588 // throw an incompatible class change exception
589 // If inner_is_member, require the inner to be a member of the outer.
590 // If !inner_is_member, require the inner to be anonymous (a non-member).
591 // Caller is responsible for figuring out in advance which case must be true.
592 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
593 bool inner_is_member, TRAPS) {
594 const int inner_class_info_index = 0;
595 const int outer_class_info_index = 1;
596
597 typeArrayHandle icls (THREAD, outer->inner_classes());
598 constantPoolHandle cp (THREAD, outer->constants());
599 for(int i = 0; i < icls->length(); i += 4) {
600 int ioff = icls->ushort_at(i + inner_class_info_index);
601 int ooff = icls->ushort_at(i + outer_class_info_index);
602
603 if (inner_is_member && ioff != 0 && ooff != 0) {
604 klassOop o = cp->klass_at(ooff, CHECK);
605 if (o == outer()) {
606 klassOop i = cp->klass_at(ioff, CHECK);
607 if (i == inner()) {
608 return;
609 }
610 }
611 }
612 if (!inner_is_member && ioff != 0 && ooff == 0 &&
613 cp->klass_name_at_matches(inner, ioff)) {
614 klassOop i = cp->klass_at(ioff, CHECK);
615 if (i == inner()) {
616 return;
617 }
618 }
619 }
620
621 // 'inner' not declared as an inner klass in outer
622 ResourceMark rm(THREAD);
623 Exceptions::fthrow(
624 THREAD_AND_LOCATION,
625 vmSymbols::java_lang_IncompatibleClassChangeError(),
626 "%s and %s disagree on InnerClasses attribute",
627 outer->external_name(),
628 inner->external_name()
629 );
630 }
631
632 // Utility method converting a single SignatureStream element into java.lang.Class instance
633
634 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
635 switch (ss->type()) {
636 default:
637 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
638 return java_lang_Class::primitive_mirror(ss->type());
639 case T_OBJECT:
640 case T_ARRAY:
641 Symbol* name = ss->as_symbol(CHECK_NULL);
642 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
643 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
644 klassOop k = SystemDictionary::resolve_or_fail(
645 name,
646 Handle(THREAD, loader),
647 Handle(THREAD, protection_domain),
648 true, CHECK_NULL);
649 if (TraceClassResolution) {
650 trace_class_resolution(k);
651 }
652 return k->java_mirror();
653 };
654 }
655
656
657 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
658 // Allocate array holding parameter types (java.lang.Class instances)
659 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
660 objArrayHandle mirrors (THREAD, m);
661 int index = 0;
662 // Collect parameter types
663 ResourceMark rm(THREAD);
664 Symbol* signature = method->signature();
665 SignatureStream ss(signature);
666 while (!ss.at_return_type()) {
667 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
668 mirrors->obj_at_put(index++, mirror);
669 ss.next();
670 }
671 assert(index == parameter_count, "invalid parameter count");
672 if (return_type != NULL) {
673 // Collect return type as well
674 assert(ss.at_return_type(), "return type should be present");
675 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
676 }
677 return mirrors;
678 }
679
680 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
681 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
682 }
683
684
685 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
686 // Basic types
687 BasicType type = vmSymbols::signature_type(signature);
688 if (type != T_OBJECT) {
689 return Handle(THREAD, Universe::java_mirror(type));
690 }
691
692 oop loader = instanceKlass::cast(k())->class_loader();
693 oop protection_domain = Klass::cast(k())->protection_domain();
694 klassOop result = SystemDictionary::resolve_or_fail(signature,
695 Handle(THREAD, loader),
696 Handle(THREAD, protection_domain),
697 true, CHECK_(Handle()));
698
699 if (TraceClassResolution) {
700 trace_class_resolution(result);
701 }
702
703 oop nt = Klass::cast(result)->java_mirror();
704 return Handle(THREAD, nt);
705 }
706
707
708 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
709 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
710 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
711 assert(!method()->is_initializer() ||
712 (for_constant_pool_access && method()->is_static()) ||
713 (method()->name() == vmSymbols::class_initializer_name()
714 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
715 instanceKlassHandle holder (THREAD, method->method_holder());
716 int slot = method->method_idnum();
717
718 Symbol* signature = method->signature();
719 int parameter_count = ArgumentCount(signature).size();
720 oop return_type_oop = NULL;
721 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
722 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
723
724 Handle return_type(THREAD, return_type_oop);
725
726 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
727
728 if (exception_types.is_null()) return NULL;
729
730 Symbol* method_name = method->name();
731 Handle name;
732 if (intern_name) {
733 // intern_name is only true with UseNewReflection
734 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
735 name = Handle(THREAD, name_oop);
736 } else {
737 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
738 }
739 if (name == NULL) return NULL;
740
741 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
742
743 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
744
745 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
746 java_lang_reflect_Method::set_slot(mh(), slot);
747 java_lang_reflect_Method::set_name(mh(), name());
748 java_lang_reflect_Method::set_return_type(mh(), return_type());
749 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
750 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
751 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
752 java_lang_reflect_Method::set_override(mh(), false);
753 if (java_lang_reflect_Method::has_signature_field() &&
754 method->generic_signature() != NULL) {
755 Symbol* gs = method->generic_signature();
756 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
757 java_lang_reflect_Method::set_signature(mh(), sig());
758 }
759 if (java_lang_reflect_Method::has_annotations_field()) {
760 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
761 }
762 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
763 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
764 }
765 if (java_lang_reflect_Method::has_annotation_default_field()) {
766 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
767 }
768 return mh();
769 }
770
771
772 oop Reflection::new_constructor(methodHandle method, TRAPS) {
773 assert(method()->is_initializer(), "should call new_method instead");
774
775 instanceKlassHandle holder (THREAD, method->method_holder());
776 int slot = method->method_idnum();
777
778 Symbol* signature = method->signature();
779 int parameter_count = ArgumentCount(signature).size();
780 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
781 if (parameter_types.is_null()) return NULL;
782
783 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
784 if (exception_types.is_null()) return NULL;
785
786 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
787
788 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
789
790 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
791 java_lang_reflect_Constructor::set_slot(ch(), slot);
792 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
793 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
794 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
795 java_lang_reflect_Constructor::set_override(ch(), false);
796 if (java_lang_reflect_Constructor::has_signature_field() &&
797 method->generic_signature() != NULL) {
798 Symbol* gs = method->generic_signature();
799 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
800 java_lang_reflect_Constructor::set_signature(ch(), sig());
801 }
802 if (java_lang_reflect_Constructor::has_annotations_field()) {
803 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
804 }
805 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
806 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
807 }
808 return ch();
809 }
810
811
812 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
813 Symbol* field_name = fd->name();
814 Handle name;
815 if (intern_name) {
816 // intern_name is only true with UseNewReflection
817 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
818 name = Handle(THREAD, name_oop);
819 } else {
820 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
821 }
822 Symbol* signature = fd->signature();
823 KlassHandle holder (THREAD, fd->field_holder());
824 Handle type = new_type(signature, holder, CHECK_NULL);
825 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
826
827 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
828 java_lang_reflect_Field::set_slot(rh(), fd->index());
829 java_lang_reflect_Field::set_name(rh(), name());
830 java_lang_reflect_Field::set_type(rh(), type());
831 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
832 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
833 java_lang_reflect_Field::set_override(rh(), false);
834 if (java_lang_reflect_Field::has_signature_field() &&
835 fd->generic_signature() != NULL) {
836 Symbol* gs = fd->generic_signature();
837 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
838 java_lang_reflect_Field::set_signature(rh(), sig());
839 }
840 if (java_lang_reflect_Field::has_annotations_field()) {
841 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
842 }
843 return rh();
844 }
845
846
847 //---------------------------------------------------------------------------
848 //
849 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
850 //
851 // See reflection.hpp for details.
852 //
853 //---------------------------------------------------------------------------
854
855 #ifdef SUPPORT_OLD_REFLECTION
856
857 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
858 KlassHandle recv_klass, Handle receiver, TRAPS) {
859 assert(!method.is_null() , "method should not be null");
860
861 CallInfo info;
862 Symbol* signature = method->signature();
863 Symbol* name = method->name();
864 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
865 name, signature,
866 KlassHandle(), false, true,
867 CHECK_(methodHandle()));
868 return info.selected_method();
869 }
870
871
872 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
873 Handle receiver, bool override, objArrayHandle ptypes,
874 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
875 ResourceMark rm(THREAD);
876
877 methodHandle method; // actual method to invoke
878 KlassHandle target_klass; // target klass, receiver's klass for non-static
879
880 // Ensure klass is initialized
881 klass->initialize(CHECK_NULL);
882
883 bool is_static = reflected_method->is_static();
884 if (is_static) {
885 // ignore receiver argument
886 method = reflected_method;
887 target_klass = klass;
888 } else {
889 // check for null receiver
890 if (receiver.is_null()) {
891 THROW_0(vmSymbols::java_lang_NullPointerException());
892 }
893 // Check class of receiver against class declaring method
894 if (!receiver->is_a(klass())) {
895 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
896 }
897 // target klass is receiver's klass
898 target_klass = KlassHandle(THREAD, receiver->klass());
899 // no need to resolve if method is private or <init>
900 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
901 method = reflected_method;
902 } else {
903 // resolve based on the receiver
904 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
905 // resolve interface call
906 if (ReflectionWrapResolutionErrors) {
907 // new default: 6531596
908 // Match resolution errors with those thrown due to reflection inlining
909 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
910 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
911 if (HAS_PENDING_EXCEPTION) {
912 // Method resolution threw an exception; wrap it in an InvocationTargetException
913 oop resolution_exception = PENDING_EXCEPTION;
914 CLEAR_PENDING_EXCEPTION;
915 JavaCallArguments args(Handle(THREAD, resolution_exception));
916 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
917 vmSymbols::throwable_void_signature(),
918 &args);
919 }
920 } else {
921 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
922 }
923 } else {
924 // if the method can be overridden, we resolve using the vtable index.
925 int index = reflected_method->vtable_index();
926 method = reflected_method;
927 if (index != methodOopDesc::nonvirtual_vtable_index) {
928 // target_klass might be an arrayKlassOop but all vtables start at
929 // the same place. The cast is to avoid virtual call and assertion.
930 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
931 method = methodHandle(THREAD, inst->method_at_vtable(index));
932 }
933 if (!method.is_null()) {
934 // Check for abstract methods as well
935 if (method->is_abstract()) {
936 // new default: 6531596
937 if (ReflectionWrapResolutionErrors) {
938 ResourceMark rm(THREAD);
939 Handle h_origexception = Exceptions::new_exception(THREAD,
940 vmSymbols::java_lang_AbstractMethodError(),
941 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
942 method->name(),
943 method->signature()));
944 JavaCallArguments args(h_origexception);
945 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
946 vmSymbols::throwable_void_signature(),
947 &args);
948 } else {
949 ResourceMark rm(THREAD);
950 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
951 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
952 method->name(),
953 method->signature()));
954 }
955 }
956 }
957 }
958 }
959 }
960
961 // I believe this is a ShouldNotGetHere case which requires
962 // an internal vtable bug. If you ever get this please let Karen know.
963 if (method.is_null()) {
964 ResourceMark rm(THREAD);
965 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
966 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
967 reflected_method->name(),
968 reflected_method->signature()));
969 }
970
971 // In the JDK 1.4 reflection implementation, the security check is
972 // done at the Java level
973 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
974
975 // Access checking (unless overridden by Method)
976 if (!override) {
977 if (!(klass->is_public() && reflected_method->is_public())) {
978 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
979 if (!access) {
980 return NULL; // exception
981 }
982 }
983 }
984
985 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
986
987 assert(ptypes->is_objArray(), "just checking");
988 int args_len = args.is_null() ? 0 : args->length();
989 // Check number of arguments
990 if (ptypes->length() != args_len) {
991 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
992 }
993
994 // Create object to contain parameters for the JavaCall
995 JavaCallArguments java_args(method->size_of_parameters());
996
997 if (!is_static) {
998 java_args.push_oop(receiver);
999 }
1000
1001 for (int i = 0; i < args_len; i++) {
1002 oop type_mirror = ptypes->obj_at(i);
1003 oop arg = args->obj_at(i);
1004 if (java_lang_Class::is_primitive(type_mirror)) {
1005 jvalue value;
1006 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1007 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
1008 if (ptype != atype) {
1009 widen(&value, atype, ptype, CHECK_NULL);
1010 }
1011 switch (ptype) {
1012 case T_BOOLEAN: java_args.push_int(value.z); break;
1013 case T_CHAR: java_args.push_int(value.c); break;
1014 case T_BYTE: java_args.push_int(value.b); break;
1015 case T_SHORT: java_args.push_int(value.s); break;
1016 case T_INT: java_args.push_int(value.i); break;
1017 case T_LONG: java_args.push_long(value.j); break;
1018 case T_FLOAT: java_args.push_float(value.f); break;
1019 case T_DOUBLE: java_args.push_double(value.d); break;
1020 default:
1021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1022 }
1023 } else {
1024 if (arg != NULL) {
1025 klassOop k = java_lang_Class::as_klassOop(type_mirror);
1026 if (!arg->is_a(k)) {
1027 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1028 }
1029 }
1030 Handle arg_handle(THREAD, arg); // Create handle for argument
1031 java_args.push_oop(arg_handle); // Push handle
1032 }
1033 }
1034
1035 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1036
1037 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1038 // oop (i.e., NOT as an handle)
1039 JavaValue result(rtype);
1040 JavaCalls::call(&result, method, &java_args, THREAD);
1041
1042 if (HAS_PENDING_EXCEPTION) {
1043 // Method threw an exception; wrap it in an InvocationTargetException
1044 oop target_exception = PENDING_EXCEPTION;
1045 CLEAR_PENDING_EXCEPTION;
1046 JavaCallArguments args(Handle(THREAD, target_exception));
1047 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1048 vmSymbols::throwable_void_signature(),
1049 &args);
1050 } else {
1051 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1052 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1053 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1054 }
1055 }
1056
1057
1058 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1059 switch (narrow_type) {
1060 case T_BOOLEAN:
1061 value->z = (jboolean) value->i;
1062 return;
1063 case T_BYTE:
1064 value->b = (jbyte) value->i;
1065 return;
1066 case T_CHAR:
1067 value->c = (jchar) value->i;
1068 return;
1069 case T_SHORT:
1070 value->s = (jshort) value->i;
1071 return;
1072 default:
1073 break; // fail
1074 }
1075 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1076 }
1077
1078
1079 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1080 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1081 return java_lang_Class::primitive_type(basic_type_mirror);
1082 }
1083
1084
1085 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1086 int types_len = types.is_null() ? 0 : types->length();
1087 if (types_len != parameter_count) return false;
1088 if (parameter_count > 0) {
1089 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1090 for (int index = 0; index < parameter_count; index++) {
1091 if (types->obj_at(index) != method_types->obj_at(index)) {
1092 return false;
1093 }
1094 }
1095 }
1096 return true;
1097 }
1098
1099
1100 oop Reflection::new_field(FieldStream* st, TRAPS) {
1101 Symbol* field_name = st->name();
1102 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1103 Symbol* signature = st->signature();
1104 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1105 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1106 oop result = rh();
1107
1108 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1109 java_lang_reflect_Field::set_slot(result, st->index());
1110 java_lang_reflect_Field::set_name(result, name());
1111 java_lang_reflect_Field::set_type(result, type());
1112 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1113 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1114 java_lang_reflect_Field::set_override(result, false);
1115 return result;
1116 }
1117
1118
1119 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1120 if (field_mirror.is_null()) {
1121 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1122 }
1123
1124 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1125 int slot = java_lang_reflect_Field::slot(field_mirror());
1126
1127 // Ensure klass is initialized
1128 klass->initialize(CHECK_false);
1129 fd->initialize(klass(), slot);
1130
1131 bool is_static = fd->is_static();
1132 KlassHandle receiver_klass;
1133
1134 if (is_static) {
1135 receiver = KlassHandle(THREAD, klass());
1136 receiver_klass = klass;
1137 } else {
1138 // Check object is a non-null instance of declaring class
1139 if (receiver.is_null()) {
1140 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1141 }
1142 if (!receiver->is_a(klass())) {
1143 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1144 }
1145 receiver_klass = KlassHandle(THREAD, receiver->klass());
1146 }
1147
1148 // Access checking (unless overridden by Field)
1149 if (!java_lang_reflect_Field::override(field_mirror())) {
1150 if (!(klass->is_public() && fd->is_public())) {
1151 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1152 if (!access_check) {
1153 return false; // exception
1154 }
1155 }
1156 }
1157
1158 if (check_final && fd->is_final()) {
1159 // In 1.3 we always throw an error when attempting to set a final field.
1160 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1161 // We currently maintain backwards compatibility. See bug 4250960.
1162 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1163 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1164 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1165 }
1166 }
1167 return true;
1168 }
1169
1170
1171 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1172 BasicType field_type = fd->field_type();
1173 int offset = fd->offset();
1174 switch (field_type) {
1175 case T_BOOLEAN:
1176 value->z = receiver->bool_field(offset);
1177 break;
1178 case T_CHAR:
1179 value->c = receiver->char_field(offset);
1180 break;
1181 case T_FLOAT:
1182 value->f = receiver->float_field(offset);
1183 break;
1184 case T_DOUBLE:
1185 value->d = receiver->double_field(offset);
1186 break;
1187 case T_BYTE:
1188 value->b = receiver->byte_field(offset);
1189 break;
1190 case T_SHORT:
1191 value->s = receiver->short_field(offset);
1192 break;
1193 case T_INT:
1194 value->i = receiver->int_field(offset);
1195 break;
1196 case T_LONG:
1197 value->j = receiver->long_field(offset);
1198 break;
1199 case T_OBJECT:
1200 case T_ARRAY:
1201 value->l = (jobject) receiver->obj_field(offset);
1202 break;
1203 default:
1204 return T_ILLEGAL;
1205 }
1206 return field_type;
1207 }
1208
1209
1210 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1211 BasicType field_type = fd->field_type();
1212 if (field_type != value_type) {
1213 widen(value, value_type, field_type, CHECK);
1214 }
1215
1216 int offset = fd->offset();
1217 switch (field_type) {
1218 case T_BOOLEAN:
1219 receiver->bool_field_put(offset, value->z);
1220 break;
1221 case T_CHAR:
1222 receiver->char_field_put(offset, value->c);
1223 break;
1224 case T_FLOAT:
1225 receiver->float_field_put(offset, value->f);
1226 break;
1227 case T_DOUBLE:
1228 receiver->double_field_put(offset, value->d);
1229 break;
1230 case T_BYTE:
1231 receiver->byte_field_put(offset, value->b);
1232 break;
1233 case T_SHORT:
1234 receiver->short_field_put(offset, value->s);
1235 break;
1236 case T_INT:
1237 receiver->int_field_put(offset, value->i);
1238 break;
1239 case T_LONG:
1240 receiver->long_field_put(offset, value->j);
1241 break;
1242 case T_OBJECT:
1243 case T_ARRAY: {
1244 Handle obj(THREAD, (oop) value->l);
1245 if (obj.not_null()) {
1246 Symbol* signature = fd->signature();
1247 Handle loader (THREAD, fd->loader());
1248 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1249 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1250 if (!obj->is_a(k)) {
1251 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1252 }
1253 }
1254 receiver->obj_field_put(offset, obj());
1255 break;
1256 }
1257 default:
1258 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1259 }
1260 }
1261
1262
1263 oop Reflection::reflect_field(oop mirror, Symbol* field_name, jint which, TRAPS) {
1264 // Exclude primitive types and array types
1265 if (java_lang_Class::is_primitive(mirror)) return NULL;
1266 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1267
1268 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1269 bool local_fields_only = (which == DECLARED);
1270
1271 // Ensure class is linked
1272 k->link_class(CHECK_NULL);
1273
1274 // Search class and interface fields
1275 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1276 if (st.name() == field_name) {
1277 if (local_fields_only || st.access_flags().is_public()) {
1278 return new_field(&st, THREAD);
1279 }
1280 }
1281 }
1282
1283 return NULL;
1284 }
1285
1286
1287 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1288 // Exclude primitive types and array types
1289 if (java_lang_Class::is_primitive(mirror)
1290 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1291 Symbol* name = vmSymbols::java_lang_reflect_Field();
1292 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1293 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1294 }
1295
1296 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1297
1298 // Ensure class is linked
1299 k->link_class(CHECK_NULL);
1300
1301 bool local_fields_only = (which == DECLARED);
1302 int count = 0;
1303 { // Compute fields count for class and interface fields
1304 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1305 if (local_fields_only || st.access_flags().is_public()) {
1306 count++;
1307 }
1308 }
1309 }
1310
1311 // Allocate result
1312 Symbol* name = vmSymbols::java_lang_reflect_Field();
1313 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1314 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1315 objArrayHandle result (THREAD, r);
1316
1317 // Fill in results backwards
1318 {
1319 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1320 if (local_fields_only || st.access_flags().is_public()) {
1321 oop field = new_field(&st, CHECK_NULL);
1322 result->obj_at_put(--count, field);
1323 }
1324 }
1325 assert(count == 0, "just checking");
1326 }
1327 return result();
1328 }
1329
1330
1331 oop Reflection::reflect_method(oop mirror, Symbol* method_name, objArrayHandle types, jint which, TRAPS) {
1332 if (java_lang_Class::is_primitive(mirror)) return NULL;
1333 klassOop klass = java_lang_Class::as_klassOop(mirror);
1334 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1335
1336 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1337 klass = SystemDictionary::Object_klass();
1338 }
1339 instanceKlassHandle h_k(THREAD, klass);
1340
1341 // Ensure klass is linked (need not be initialized)
1342 h_k->link_class(CHECK_NULL);
1343
1344 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1345 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1346
1347 switch (which) {
1348 case MEMBER_PUBLIC:
1349 // First the public non-static methods (works if method holder is an interface)
1350 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1351 {
1352 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1353 methodHandle m(THREAD, st.method());
1354 // For interfaces include static initializers since classic does that!
1355 if (method_name == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1356 Symbol* signature = m->signature();
1357 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1358 if (parameter_match) {
1359 return new_method(m, false, false, THREAD);
1360 }
1361 }
1362 }
1363 }
1364 // Then the public static methods (works if method holder is an interface)
1365 {
1366 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1367 methodHandle m(THREAD, st.method());
1368 if (method_name == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1369 Symbol* signature = m->signature();
1370 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1371 if (parameter_match) {
1372 return new_method(m, false, false, THREAD);
1373 }
1374 }
1375 }
1376 }
1377 break;
1378 case MEMBER_DECLARED:
1379 // All local methods
1380 {
1381 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1382 methodHandle m(THREAD, st.method());
1383 if (method_name == m->name() && !m->is_initializer()) {
1384 Symbol* signature = m->signature();
1385 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1386 if (parameter_match) {
1387 return new_method(m, false, false, THREAD);
1388 }
1389 }
1390 }
1391 }
1392 break;
1393 default:
1394 break;
1395 }
1396 return NULL;
1397 }
1398
1399
1400 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1401 // Exclude primitive types
1402 if (java_lang_Class::is_primitive(mirror) ||
1403 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1404 klassOop klass = SystemDictionary::reflect_Method_klass();
1405 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1406 }
1407
1408 klassOop klass = java_lang_Class::as_klassOop(mirror);
1409 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1410 klass = SystemDictionary::Object_klass();
1411 }
1412 instanceKlassHandle h_k(THREAD, klass);
1413
1414 // Ensure klass is linked (need not be initialized)
1415 h_k->link_class(CHECK_NULL);
1416
1417 // We search the (super)interfaces only if h_k is an interface itself
1418 bool is_interface = h_k->is_interface();
1419
1420 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1421 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1422
1423 switch (which) {
1424 case MEMBER_PUBLIC:
1425 {
1426
1427 // Count public methods (non-static and static)
1428 int count = 0;
1429 {
1430 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1431 methodOop m = st.method();
1432 // For interfaces include static initializers since classic does that!
1433 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1434 count++;
1435 }
1436 }
1437 }
1438
1439 // Allocate result
1440 klassOop klass = SystemDictionary::reflect_Method_klass();
1441 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1442 objArrayHandle h_result (THREAD, r);
1443
1444 // Fill in results backwards
1445 {
1446 // First the non-static public methods
1447 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1448 methodHandle m (THREAD, st.method());
1449 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1450 oop method = new_method(m, false, false, CHECK_NULL);
1451 if (method == NULL) {
1452 return NULL;
1453 } else {
1454 h_result->obj_at_put(--count, method);
1455 }
1456 }
1457 }
1458 }
1459 {
1460 // Then the static public methods
1461 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1462 methodHandle m (THREAD, st.method());
1463 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1464 oop method = new_method(m, false, false, CHECK_NULL);
1465 if (method == NULL) {
1466 return NULL;
1467 } else {
1468 h_result->obj_at_put(--count, method);
1469 }
1470 }
1471 }
1472 }
1473
1474 assert(count == 0, "just checking");
1475 return h_result();
1476 }
1477
1478 case MEMBER_DECLARED:
1479 {
1480 // Count all methods
1481 int count = 0;
1482 {
1483 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1484 methodOop m = st.method();
1485 if (!m->is_initializer()) {
1486 count++;
1487 }
1488 }
1489 }
1490 // Allocate result
1491 klassOop klass = SystemDictionary::reflect_Method_klass();
1492 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1493 objArrayHandle h_result (THREAD, r);
1494
1495 // Fill in results backwards
1496 {
1497 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1498 methodHandle m (THREAD, st.method());
1499 if (!m->is_initializer()) {
1500 oop method = new_method(m, false, false, CHECK_NULL);
1501 if (method == NULL) {
1502 return NULL;
1503 } else {
1504 h_result->obj_at_put(--count, method);
1505 }
1506 }
1507 }
1508 }
1509 assert(count == 0, "just checking");
1510 return h_result();
1511 }
1512 }
1513 ShouldNotReachHere();
1514 return NULL;
1515 }
1516
1517
1518 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1519
1520 // Exclude primitive, interface and array types
1521 bool prim = java_lang_Class::is_primitive(mirror);
1522 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1523 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1524
1525 // Must be instance klass
1526 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1527
1528 // Ensure klass is linked (need not be initialized)
1529 h_k->link_class(CHECK_NULL);
1530
1531 bool local_only = (which == MEMBER_DECLARED);
1532 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1533 methodHandle m(THREAD, st.method());
1534 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1535 Symbol* signature = m->signature();
1536 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1537 if (parameter_match) {
1538 return new_constructor(m, THREAD);
1539 }
1540 }
1541 }
1542
1543 return NULL;
1544 }
1545
1546
1547 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1548 // Exclude primitive, interface and array types
1549 bool prim = java_lang_Class::is_primitive(mirror);
1550 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1551 if (prim || k->is_interface() || k->oop_is_array()) {
1552 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array
1553 }
1554
1555 // Must be instanceKlass at this point
1556 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1557
1558 // Ensure klass is linked (need not be initialized)
1559 h_k->link_class(CHECK_NULL);
1560
1561 bool local_only = (which == MEMBER_DECLARED);
1562 int count = 0;
1563 {
1564 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1565 methodOop m = st.method();
1566 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1567 count++;
1568 }
1569 }
1570 }
1571
1572 // Allocate result
1573 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
1574 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1575 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1576 objArrayHandle h_result (THREAD, r);
1577
1578 // Fill in results backwards
1579 {
1580 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1581 methodHandle m (THREAD, st.method());
1582 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1583 oop constr = new_constructor(m, CHECK_NULL);
1584 if (constr == NULL) {
1585 return NULL;
1586 } else {
1587 h_result->obj_at_put(--count, constr);
1588 }
1589 }
1590 }
1591 assert(count == 0, "just checking");
1592 }
1593 return h_result();
1594 }
1595
1596
1597 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1598 // of java.lang.reflect.Constructor
1599
1600 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1601 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1602 int slot = java_lang_reflect_Method::slot(method_mirror);
1603 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1604 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1605
1606 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1607 BasicType rtype;
1608 if (java_lang_Class::is_primitive(return_type_mirror)) {
1609 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1610 } else {
1611 rtype = T_OBJECT;
1612 }
1613
1614 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1615 methodOop m = klass->method_with_idnum(slot);
1616 if (m == NULL) {
1617 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1618 }
1619 methodHandle method(THREAD, m);
1620
1621 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1622 }
1623
1624
1625 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1626 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1627 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1628 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1629 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1630
1631 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1632 methodOop m = klass->method_with_idnum(slot);
1633 if (m == NULL) {
1634 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1635 }
1636 methodHandle method(THREAD, m);
1637 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1638
1639 // Make sure klass gets initialize
1640 klass->initialize(CHECK_NULL);
1641
1642 // Create new instance (the receiver)
1643 klass->check_valid_for_instantiation(false, CHECK_NULL);
1644 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1645
1646 // Ignore result from call and return receiver
1647 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1648 return receiver();
1649 }
1650
1651
1652 #endif /* SUPPORT_OLD_REFLECTION */