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 symbolOop 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 vmSymbolHandles::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 symbolOop 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 symbolHandle(THREAD, 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->klass_part()->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 symbolHandle signature (THREAD, method->signature());
664 SignatureStream ss(signature);
665 while (!ss.at_return_type()) {
666 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
667 mirrors->obj_at_put(index++, mirror);
668 ss.next();
669 }
670 assert(index == parameter_count, "invalid parameter count");
671 if (return_type != NULL) {
672 // Collect return type as well
673 assert(ss.at_return_type(), "return type should be present");
674 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
675 }
676 return mirrors;
677 }
678
679 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
680 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
681 }
682
683
684 Handle Reflection::new_type(symbolHandle signature, KlassHandle k, TRAPS) {
685 // Basic types
686 BasicType type = vmSymbols::signature_type(signature());
687 if (type != T_OBJECT) {
688 return Handle(THREAD, Universe::java_mirror(type));
689 }
690
691 oop loader = instanceKlass::cast(k())->class_loader();
692 oop protection_domain = Klass::cast(k())->protection_domain();
693 klassOop result = SystemDictionary::resolve_or_fail(signature,
694 Handle(THREAD, loader),
695 Handle(THREAD, protection_domain),
696 true, CHECK_(Handle()));
697
698 if (TraceClassResolution) {
699 trace_class_resolution(result);
700 }
701
702 oop nt = Klass::cast(result)->java_mirror();
703 return Handle(THREAD, nt);
704 }
705
706
707 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
708 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
709 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
710 assert(!method()->is_initializer() ||
711 (for_constant_pool_access && method()->is_static()) ||
712 (method()->name() == vmSymbols::class_initializer_name()
713 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
714 instanceKlassHandle holder (THREAD, method->method_holder());
715 int slot = method->method_idnum();
716
717 symbolHandle signature (THREAD, method->signature());
718 int parameter_count = ArgumentCount(signature).size();
719 oop return_type_oop = NULL;
720 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
721 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
722
723 Handle return_type(THREAD, return_type_oop);
724
725 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
726
727 if (exception_types.is_null()) return NULL;
728
729 symbolHandle method_name(THREAD, method->name());
730 Handle name;
731 if (intern_name) {
732 // intern_name is only true with UseNewReflection
733 oop name_oop = StringTable::intern(method_name(), CHECK_NULL);
734 name = Handle(THREAD, name_oop);
735 } else {
736 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
737 }
738 if (name.is_null()) return NULL;
739
740 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
741
742 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
743
744 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
745 java_lang_reflect_Method::set_slot(mh(), slot);
746 java_lang_reflect_Method::set_name(mh(), name());
747 java_lang_reflect_Method::set_return_type(mh(), return_type());
748 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
749 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
750 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
751 java_lang_reflect_Method::set_override(mh(), false);
752 if (java_lang_reflect_Method::has_signature_field() &&
753 method->generic_signature() != NULL) {
754 symbolHandle gs(THREAD, method->generic_signature());
755 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
756 java_lang_reflect_Method::set_signature(mh(), sig());
757 }
758 if (java_lang_reflect_Method::has_annotations_field()) {
759 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
760 }
761 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
762 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
763 }
764 if (java_lang_reflect_Method::has_annotation_default_field()) {
765 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
766 }
767 return mh();
768 }
769
770
771 oop Reflection::new_constructor(methodHandle method, TRAPS) {
772 assert(method()->is_initializer(), "should call new_method instead");
773
774 instanceKlassHandle holder (THREAD, method->method_holder());
775 int slot = method->method_idnum();
776
777 symbolHandle signature (THREAD, method->signature());
778 int parameter_count = ArgumentCount(signature).size();
779 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
780 if (parameter_types.is_null()) return NULL;
781
782 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
783 if (exception_types.is_null()) return NULL;
784
785 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
786
787 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
788
789 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
790 java_lang_reflect_Constructor::set_slot(ch(), slot);
791 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
792 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
793 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
794 java_lang_reflect_Constructor::set_override(ch(), false);
795 if (java_lang_reflect_Constructor::has_signature_field() &&
796 method->generic_signature() != NULL) {
797 symbolHandle gs(THREAD, method->generic_signature());
798 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
799 java_lang_reflect_Constructor::set_signature(ch(), sig());
800 }
801 if (java_lang_reflect_Constructor::has_annotations_field()) {
802 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
803 }
804 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
805 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
806 }
807 return ch();
808 }
809
810
811 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
812 symbolHandle field_name(THREAD, fd->name());
813 Handle name;
814 if (intern_name) {
815 // intern_name is only true with UseNewReflection
816 oop name_oop = StringTable::intern(field_name(), CHECK_NULL);
817 name = Handle(THREAD, name_oop);
818 } else {
819 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
820 }
821 symbolHandle signature (THREAD, fd->signature());
822 KlassHandle holder (THREAD, fd->field_holder());
823 Handle type = new_type(signature, holder, CHECK_NULL);
824 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
825
826 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
827 java_lang_reflect_Field::set_slot(rh(), fd->index());
828 java_lang_reflect_Field::set_name(rh(), name());
829 java_lang_reflect_Field::set_type(rh(), type());
830 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
831 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
832 java_lang_reflect_Field::set_override(rh(), false);
833 if (java_lang_reflect_Field::has_signature_field() &&
834 fd->generic_signature() != NULL) {
835 symbolHandle gs(THREAD, fd->generic_signature());
836 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
837 java_lang_reflect_Field::set_signature(rh(), sig());
838 }
839 if (java_lang_reflect_Field::has_annotations_field()) {
840 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
841 }
842 return rh();
843 }
844
845
846 //---------------------------------------------------------------------------
847 //
848 // Supporting routines for old native code-based reflection (pre-JDK 1.4).
849 //
850 // See reflection.hpp for details.
851 //
852 //---------------------------------------------------------------------------
853
854 #ifdef SUPPORT_OLD_REFLECTION
855
856 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
857 KlassHandle recv_klass, Handle receiver, TRAPS) {
858 assert(!method.is_null() , "method should not be null");
859
860 CallInfo info;
861 symbolHandle signature (THREAD, method->signature());
862 symbolHandle name (THREAD, method->name());
863 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
864 name, signature,
865 KlassHandle(), false, true,
866 CHECK_(methodHandle()));
867 return info.selected_method();
868 }
869
870
871 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
872 Handle receiver, bool override, objArrayHandle ptypes,
873 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
874 ResourceMark rm(THREAD);
875
876 methodHandle method; // actual method to invoke
877 KlassHandle target_klass; // target klass, receiver's klass for non-static
878
879 // Ensure klass is initialized
880 klass->initialize(CHECK_NULL);
881
882 bool is_static = reflected_method->is_static();
883 if (is_static) {
884 // ignore receiver argument
885 method = reflected_method;
886 target_klass = klass;
887 } else {
888 // check for null receiver
889 if (receiver.is_null()) {
890 THROW_0(vmSymbols::java_lang_NullPointerException());
891 }
892 // Check class of receiver against class declaring method
893 if (!receiver->is_a(klass())) {
894 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
895 }
896 // target klass is receiver's klass
897 target_klass = KlassHandle(THREAD, receiver->klass());
898 // no need to resolve if method is private or <init>
899 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
900 method = reflected_method;
901 } else {
902 // resolve based on the receiver
903 if (instanceKlass::cast(reflected_method->method_holder())->is_interface()) {
904 // resolve interface call
905 if (ReflectionWrapResolutionErrors) {
906 // new default: 6531596
907 // Match resolution errors with those thrown due to reflection inlining
908 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
909 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
910 if (HAS_PENDING_EXCEPTION) {
911 // Method resolution threw an exception; wrap it in an InvocationTargetException
912 oop resolution_exception = PENDING_EXCEPTION;
913 CLEAR_PENDING_EXCEPTION;
914 JavaCallArguments args(Handle(THREAD, resolution_exception));
915 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
916 vmSymbolHandles::throwable_void_signature(),
917 &args);
918 }
919 } else {
920 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
921 }
922 } else {
923 // if the method can be overridden, we resolve using the vtable index.
924 int index = reflected_method->vtable_index();
925 method = reflected_method;
926 if (index != methodOopDesc::nonvirtual_vtable_index) {
927 // target_klass might be an arrayKlassOop but all vtables start at
928 // the same place. The cast is to avoid virtual call and assertion.
929 instanceKlass* inst = (instanceKlass*)target_klass()->klass_part();
930 method = methodHandle(THREAD, inst->method_at_vtable(index));
931 }
932 if (!method.is_null()) {
933 // Check for abstract methods as well
934 if (method->is_abstract()) {
935 // new default: 6531596
936 if (ReflectionWrapResolutionErrors) {
937 ResourceMark rm(THREAD);
938 Handle h_origexception = Exceptions::new_exception(THREAD,
939 vmSymbols::java_lang_AbstractMethodError(),
940 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
941 method->name(),
942 method->signature()));
943 JavaCallArguments args(h_origexception);
944 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
945 vmSymbolHandles::throwable_void_signature(),
946 &args);
947 } else {
948 ResourceMark rm(THREAD);
949 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
950 methodOopDesc::name_and_sig_as_C_string(Klass::cast(target_klass()),
951 method->name(),
952 method->signature()));
953 }
954 }
955 }
956 }
957 }
958 }
959
960 // I believe this is a ShouldNotGetHere case which requires
961 // an internal vtable bug. If you ever get this please let Karen know.
962 if (method.is_null()) {
963 ResourceMark rm(THREAD);
964 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
965 methodOopDesc::name_and_sig_as_C_string(Klass::cast(klass()),
966 reflected_method->name(),
967 reflected_method->signature()));
968 }
969
970 // In the JDK 1.4 reflection implementation, the security check is
971 // done at the Java level
972 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
973
974 // Access checking (unless overridden by Method)
975 if (!override) {
976 if (!(klass->is_public() && reflected_method->is_public())) {
977 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
978 if (!access) {
979 return NULL; // exception
980 }
981 }
982 }
983
984 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
985
986 assert(ptypes->is_objArray(), "just checking");
987 int args_len = args.is_null() ? 0 : args->length();
988 // Check number of arguments
989 if (ptypes->length() != args_len) {
990 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
991 }
992
993 // Create object to contain parameters for the JavaCall
994 JavaCallArguments java_args(method->size_of_parameters());
995
996 if (!is_static) {
997 java_args.push_oop(receiver);
998 }
999
1000 for (int i = 0; i < args_len; i++) {
1001 oop type_mirror = ptypes->obj_at(i);
1002 oop arg = args->obj_at(i);
1003 if (java_lang_Class::is_primitive(type_mirror)) {
1004 jvalue value;
1005 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1006 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
1007 if (ptype != atype) {
1008 widen(&value, atype, ptype, CHECK_NULL);
1009 }
1010 switch (ptype) {
1011 case T_BOOLEAN: java_args.push_int(value.z); break;
1012 case T_CHAR: java_args.push_int(value.c); break;
1013 case T_BYTE: java_args.push_int(value.b); break;
1014 case T_SHORT: java_args.push_int(value.s); break;
1015 case T_INT: java_args.push_int(value.i); break;
1016 case T_LONG: java_args.push_long(value.j); break;
1017 case T_FLOAT: java_args.push_float(value.f); break;
1018 case T_DOUBLE: java_args.push_double(value.d); break;
1019 default:
1020 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1021 }
1022 } else {
1023 if (arg != NULL) {
1024 klassOop k = java_lang_Class::as_klassOop(type_mirror);
1025 if (!arg->is_a(k)) {
1026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1027 }
1028 }
1029 Handle arg_handle(THREAD, arg); // Create handle for argument
1030 java_args.push_oop(arg_handle); // Push handle
1031 }
1032 }
1033
1034 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1035
1036 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1037 // oop (i.e., NOT as an handle)
1038 JavaValue result(rtype);
1039 JavaCalls::call(&result, method, &java_args, THREAD);
1040
1041 if (HAS_PENDING_EXCEPTION) {
1042 // Method threw an exception; wrap it in an InvocationTargetException
1043 oop target_exception = PENDING_EXCEPTION;
1044 CLEAR_PENDING_EXCEPTION;
1045 JavaCallArguments args(Handle(THREAD, target_exception));
1046 THROW_ARG_0(vmSymbolHandles::java_lang_reflect_InvocationTargetException(),
1047 vmSymbolHandles::throwable_void_signature(),
1048 &args);
1049 } else {
1050 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1051 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1052 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1053 }
1054 }
1055
1056
1057 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1058 switch (narrow_type) {
1059 case T_BOOLEAN:
1060 value->z = (jboolean) value->i;
1061 return;
1062 case T_BYTE:
1063 value->b = (jbyte) value->i;
1064 return;
1065 case T_CHAR:
1066 value->c = (jchar) value->i;
1067 return;
1068 case T_SHORT:
1069 value->s = (jshort) value->i;
1070 return;
1071 default:
1072 break; // fail
1073 }
1074 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1075 }
1076
1077
1078 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1079 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1080 return java_lang_Class::primitive_type(basic_type_mirror);
1081 }
1082
1083
1084 bool Reflection::match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS) {
1085 int types_len = types.is_null() ? 0 : types->length();
1086 if (types_len != parameter_count) return false;
1087 if (parameter_count > 0) {
1088 objArrayHandle method_types = get_parameter_types(method, parameter_count, NULL, CHECK_false);
1089 for (int index = 0; index < parameter_count; index++) {
1090 if (types->obj_at(index) != method_types->obj_at(index)) {
1091 return false;
1092 }
1093 }
1094 }
1095 return true;
1096 }
1097
1098
1099 oop Reflection::new_field(FieldStream* st, TRAPS) {
1100 symbolHandle field_name(THREAD, st->name());
1101 Handle name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
1102 symbolHandle signature(THREAD, st->signature());
1103 Handle type = new_type(signature, st->klass(), CHECK_NULL);
1104 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
1105 oop result = rh();
1106
1107 java_lang_reflect_Field::set_clazz(result, st->klass()->java_mirror());
1108 java_lang_reflect_Field::set_slot(result, st->index());
1109 java_lang_reflect_Field::set_name(result, name());
1110 java_lang_reflect_Field::set_type(result, type());
1111 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
1112 java_lang_reflect_Field::set_modifiers(result, st->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
1113 java_lang_reflect_Field::set_override(result, false);
1114 return result;
1115 }
1116
1117
1118 bool Reflection::resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS) {
1119 if (field_mirror.is_null()) {
1120 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1121 }
1122
1123 instanceKlassHandle klass (THREAD, java_lang_Class::as_klassOop(java_lang_reflect_Field::clazz(field_mirror())));
1124 int slot = java_lang_reflect_Field::slot(field_mirror());
1125
1126 // Ensure klass is initialized
1127 klass->initialize(CHECK_false);
1128 fd->initialize(klass(), slot);
1129
1130 bool is_static = fd->is_static();
1131 KlassHandle receiver_klass;
1132
1133 if (is_static) {
1134 receiver = KlassHandle(THREAD, klass());
1135 receiver_klass = klass;
1136 } else {
1137 // Check object is a non-null instance of declaring class
1138 if (receiver.is_null()) {
1139 THROW_(vmSymbols::java_lang_NullPointerException(), false);
1140 }
1141 if (!receiver->is_a(klass())) {
1142 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class", false);
1143 }
1144 receiver_klass = KlassHandle(THREAD, receiver->klass());
1145 }
1146
1147 // Access checking (unless overridden by Field)
1148 if (!java_lang_reflect_Field::override(field_mirror())) {
1149 if (!(klass->is_public() && fd->is_public())) {
1150 bool access_check = reflect_check_access(klass(), fd->access_flags(), receiver_klass(), false, CHECK_false);
1151 if (!access_check) {
1152 return false; // exception
1153 }
1154 }
1155 }
1156
1157 if (check_final && fd->is_final()) {
1158 // In 1.3 we always throw an error when attempting to set a final field.
1159 // In 1.2.x, this was allowed in the override bit was set by calling Field.setAccessible(true).
1160 // We currently maintain backwards compatibility. See bug 4250960.
1161 bool strict_final_check = !JDK_Version::is_jdk12x_version();
1162 if (strict_final_check || !java_lang_reflect_Field::override(field_mirror())) {
1163 THROW_MSG_(vmSymbols::java_lang_IllegalAccessException(), "field is final", false);
1164 }
1165 }
1166 return true;
1167 }
1168
1169
1170 BasicType Reflection::field_get(jvalue* value, fieldDescriptor* fd, Handle receiver) {
1171 BasicType field_type = fd->field_type();
1172 int offset = fd->offset();
1173 switch (field_type) {
1174 case T_BOOLEAN:
1175 value->z = receiver->bool_field(offset);
1176 break;
1177 case T_CHAR:
1178 value->c = receiver->char_field(offset);
1179 break;
1180 case T_FLOAT:
1181 value->f = receiver->float_field(offset);
1182 break;
1183 case T_DOUBLE:
1184 value->d = receiver->double_field(offset);
1185 break;
1186 case T_BYTE:
1187 value->b = receiver->byte_field(offset);
1188 break;
1189 case T_SHORT:
1190 value->s = receiver->short_field(offset);
1191 break;
1192 case T_INT:
1193 value->i = receiver->int_field(offset);
1194 break;
1195 case T_LONG:
1196 value->j = receiver->long_field(offset);
1197 break;
1198 case T_OBJECT:
1199 case T_ARRAY:
1200 value->l = (jobject) receiver->obj_field(offset);
1201 break;
1202 default:
1203 return T_ILLEGAL;
1204 }
1205 return field_type;
1206 }
1207
1208
1209 void Reflection::field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS) {
1210 BasicType field_type = fd->field_type();
1211 if (field_type != value_type) {
1212 widen(value, value_type, field_type, CHECK);
1213 }
1214
1215 int offset = fd->offset();
1216 switch (field_type) {
1217 case T_BOOLEAN:
1218 receiver->bool_field_put(offset, value->z);
1219 break;
1220 case T_CHAR:
1221 receiver->char_field_put(offset, value->c);
1222 break;
1223 case T_FLOAT:
1224 receiver->float_field_put(offset, value->f);
1225 break;
1226 case T_DOUBLE:
1227 receiver->double_field_put(offset, value->d);
1228 break;
1229 case T_BYTE:
1230 receiver->byte_field_put(offset, value->b);
1231 break;
1232 case T_SHORT:
1233 receiver->short_field_put(offset, value->s);
1234 break;
1235 case T_INT:
1236 receiver->int_field_put(offset, value->i);
1237 break;
1238 case T_LONG:
1239 receiver->long_field_put(offset, value->j);
1240 break;
1241 case T_OBJECT:
1242 case T_ARRAY: {
1243 Handle obj(THREAD, (oop) value->l);
1244 if (obj.not_null()) {
1245 symbolHandle signature(THREAD, fd->signature());
1246 Handle loader (THREAD, fd->loader());
1247 Handle protect (THREAD, Klass::cast(fd->field_holder())->protection_domain());
1248 klassOop k = SystemDictionary::resolve_or_fail(signature, loader, protect, true, CHECK); // may block
1249 if (!obj->is_a(k)) {
1250 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1251 }
1252 }
1253 receiver->obj_field_put(offset, obj());
1254 break;
1255 }
1256 default:
1257 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "field type mismatch");
1258 }
1259 }
1260
1261
1262 oop Reflection::reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS) {
1263 // Exclude primitive types and array types
1264 if (java_lang_Class::is_primitive(mirror)) return NULL;
1265 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) return NULL;
1266
1267 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1268 bool local_fields_only = (which == DECLARED);
1269
1270 // Ensure class is linked
1271 k->link_class(CHECK_NULL);
1272
1273 // Search class and interface fields
1274 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1275 if (st.name() == field_name) {
1276 if (local_fields_only || st.access_flags().is_public()) {
1277 return new_field(&st, THREAD);
1278 }
1279 }
1280 }
1281
1282 return NULL;
1283 }
1284
1285
1286 objArrayOop Reflection::reflect_fields(oop mirror, jint which, TRAPS) {
1287 // Exclude primitive types and array types
1288 if (java_lang_Class::is_primitive(mirror)
1289 || Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1290 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1291 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1292 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1293 }
1294
1295 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(mirror));
1296
1297 // Ensure class is linked
1298 k->link_class(CHECK_NULL);
1299
1300 bool local_fields_only = (which == DECLARED);
1301 int count = 0;
1302 { // Compute fields count for class and interface fields
1303 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1304 if (local_fields_only || st.access_flags().is_public()) {
1305 count++;
1306 }
1307 }
1308 }
1309
1310 // Allocate result
1311 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
1312 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1313 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1314 objArrayHandle result (THREAD, r);
1315
1316 // Fill in results backwards
1317 {
1318 for (FieldStream st(k, local_fields_only, false); !st.eos(); st.next()) {
1319 if (local_fields_only || st.access_flags().is_public()) {
1320 oop field = new_field(&st, CHECK_NULL);
1321 result->obj_at_put(--count, field);
1322 }
1323 }
1324 assert(count == 0, "just checking");
1325 }
1326 return result();
1327 }
1328
1329
1330 oop Reflection::reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS) {
1331 if (java_lang_Class::is_primitive(mirror)) return NULL;
1332 klassOop klass = java_lang_Class::as_klassOop(mirror);
1333 if (Klass::cast(klass)->oop_is_array() && which == MEMBER_DECLARED) return NULL;
1334
1335 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1336 klass = SystemDictionary::Object_klass();
1337 }
1338 instanceKlassHandle h_k(THREAD, klass);
1339
1340 // Ensure klass is linked (need not be initialized)
1341 h_k->link_class(CHECK_NULL);
1342
1343 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1344 bool include_clinit = JDK_Version::is_jdk12x_version() && h_k->is_interface();
1345
1346 switch (which) {
1347 case MEMBER_PUBLIC:
1348 // First the public non-static methods (works if method holder is an interface)
1349 // Note that we can ignore checks for overridden methods, since we go up the hierarchy.
1350 {
1351 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1352 methodHandle m(THREAD, st.method());
1353 // For interfaces include static initializers since classic does that!
1354 if (method_name() == m->name() && (include_clinit || (m->is_public() && !m->is_static() && !m->is_initializer()))) {
1355 symbolHandle signature(THREAD, m->signature());
1356 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1357 if (parameter_match) {
1358 return new_method(m, false, false, THREAD);
1359 }
1360 }
1361 }
1362 }
1363 // Then the public static methods (works if method holder is an interface)
1364 {
1365 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1366 methodHandle m(THREAD, st.method());
1367 if (method_name() == m->name() && m->is_public() && m->is_static() && !m->is_initializer()) {
1368 symbolHandle signature(THREAD, m->signature());
1369 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1370 if (parameter_match) {
1371 return new_method(m, false, false, THREAD);
1372 }
1373 }
1374 }
1375 }
1376 break;
1377 case MEMBER_DECLARED:
1378 // All local methods
1379 {
1380 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1381 methodHandle m(THREAD, st.method());
1382 if (method_name() == m->name() && !m->is_initializer()) {
1383 symbolHandle signature(THREAD, m->signature());
1384 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1385 if (parameter_match) {
1386 return new_method(m, false, false, THREAD);
1387 }
1388 }
1389 }
1390 }
1391 break;
1392 default:
1393 break;
1394 }
1395 return NULL;
1396 }
1397
1398
1399 objArrayOop Reflection::reflect_methods(oop mirror, jint which, TRAPS) {
1400 // Exclude primitive types
1401 if (java_lang_Class::is_primitive(mirror) ||
1402 (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array() && (which == MEMBER_DECLARED))) {
1403 klassOop klass = SystemDictionary::reflect_Method_klass();
1404 return oopFactory::new_objArray(klass, 0, CHECK_NULL); // Return empty array
1405 }
1406
1407 klassOop klass = java_lang_Class::as_klassOop(mirror);
1408 if (Klass::cast(java_lang_Class::as_klassOop(mirror))->oop_is_array()) {
1409 klass = SystemDictionary::Object_klass();
1410 }
1411 instanceKlassHandle h_k(THREAD, klass);
1412
1413 // Ensure klass is linked (need not be initialized)
1414 h_k->link_class(CHECK_NULL);
1415
1416 // We search the (super)interfaces only if h_k is an interface itself
1417 bool is_interface = h_k->is_interface();
1418
1419 // For interfaces include static initializers under jdk1.2.x (since classic does that)
1420 bool include_clinit = JDK_Version::is_jdk12x_version() && is_interface;
1421
1422 switch (which) {
1423 case MEMBER_PUBLIC:
1424 {
1425
1426 // Count public methods (non-static and static)
1427 int count = 0;
1428 {
1429 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1430 methodOop m = st.method();
1431 // For interfaces include static initializers since classic does that!
1432 if (include_clinit || (!m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k()))) {
1433 count++;
1434 }
1435 }
1436 }
1437
1438 // Allocate result
1439 klassOop klass = SystemDictionary::reflect_Method_klass();
1440 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1441 objArrayHandle h_result (THREAD, r);
1442
1443 // Fill in results backwards
1444 {
1445 // First the non-static public methods
1446 for (MethodStream st(h_k, false, false); !st.eos(); st.next()) {
1447 methodHandle m (THREAD, st.method());
1448 if (!m->is_static() && !m->is_initializer() && m->is_public() && !m->is_overridden_in(h_k())) {
1449 oop method = new_method(m, false, false, CHECK_NULL);
1450 if (method == NULL) {
1451 return NULL;
1452 } else {
1453 h_result->obj_at_put(--count, method);
1454 }
1455 }
1456 }
1457 }
1458 {
1459 // Then the static public methods
1460 for (MethodStream st(h_k, false, !is_interface); !st.eos(); st.next()) {
1461 methodHandle m (THREAD, st.method());
1462 if (m->is_static() && (include_clinit || (!m->is_initializer()) && m->is_public() && !m->is_overridden_in(h_k()))) {
1463 oop method = new_method(m, false, false, CHECK_NULL);
1464 if (method == NULL) {
1465 return NULL;
1466 } else {
1467 h_result->obj_at_put(--count, method);
1468 }
1469 }
1470 }
1471 }
1472
1473 assert(count == 0, "just checking");
1474 return h_result();
1475 }
1476
1477 case MEMBER_DECLARED:
1478 {
1479 // Count all methods
1480 int count = 0;
1481 {
1482 for (MethodStream st(h_k, true, !is_interface); !st.eos(); st.next()) {
1483 methodOop m = st.method();
1484 if (!m->is_initializer()) {
1485 count++;
1486 }
1487 }
1488 }
1489 // Allocate result
1490 klassOop klass = SystemDictionary::reflect_Method_klass();
1491 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1492 objArrayHandle h_result (THREAD, r);
1493
1494 // Fill in results backwards
1495 {
1496 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1497 methodHandle m (THREAD, st.method());
1498 if (!m->is_initializer()) {
1499 oop method = new_method(m, false, false, CHECK_NULL);
1500 if (method == NULL) {
1501 return NULL;
1502 } else {
1503 h_result->obj_at_put(--count, method);
1504 }
1505 }
1506 }
1507 }
1508 assert(count == 0, "just checking");
1509 return h_result();
1510 }
1511 }
1512 ShouldNotReachHere();
1513 return NULL;
1514 }
1515
1516
1517 oop Reflection::reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS) {
1518
1519 // Exclude primitive, interface and array types
1520 bool prim = java_lang_Class::is_primitive(mirror);
1521 Klass* klass = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1522 if (prim || klass->is_interface() || klass->oop_is_array()) return NULL;
1523
1524 // Must be instance klass
1525 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1526
1527 // Ensure klass is linked (need not be initialized)
1528 h_k->link_class(CHECK_NULL);
1529
1530 bool local_only = (which == MEMBER_DECLARED);
1531 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1532 methodHandle m(THREAD, st.method());
1533 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1534 symbolHandle signature(THREAD, m->signature());
1535 bool parameter_match = match_parameter_types(m, types, ArgumentCount(signature).size(), CHECK_NULL);
1536 if (parameter_match) {
1537 return new_constructor(m, THREAD);
1538 }
1539 }
1540 }
1541
1542 return NULL;
1543 }
1544
1545
1546 objArrayOop Reflection::reflect_constructors(oop mirror, jint which, TRAPS) {
1547 // Exclude primitive, interface and array types
1548 bool prim = java_lang_Class::is_primitive(mirror);
1549 Klass* k = prim ? NULL : Klass::cast(java_lang_Class::as_klassOop(mirror));
1550 if (prim || k->is_interface() || k->oop_is_array()) {
1551 return oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0, CHECK_NULL); // Return empty array
1552 }
1553
1554 // Must be instanceKlass at this point
1555 instanceKlassHandle h_k(THREAD, java_lang_Class::as_klassOop(mirror));
1556
1557 // Ensure klass is linked (need not be initialized)
1558 h_k->link_class(CHECK_NULL);
1559
1560 bool local_only = (which == MEMBER_DECLARED);
1561 int count = 0;
1562 {
1563 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1564 methodOop m = st.method();
1565 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1566 count++;
1567 }
1568 }
1569 }
1570
1571 // Allocate result
1572 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
1573 klassOop klass = SystemDictionary::resolve_or_fail(name, true, CHECK_NULL);
1574 objArrayOop r = oopFactory::new_objArray(klass, count, CHECK_NULL);
1575 objArrayHandle h_result (THREAD, r);
1576
1577 // Fill in results backwards
1578 {
1579 for (MethodStream st(h_k, true, true); !st.eos(); st.next()) {
1580 methodHandle m (THREAD, st.method());
1581 if (m->name() == vmSymbols::object_initializer_name() && (local_only || m->is_public())) {
1582 oop constr = new_constructor(m, CHECK_NULL);
1583 if (constr == NULL) {
1584 return NULL;
1585 } else {
1586 h_result->obj_at_put(--count, constr);
1587 }
1588 }
1589 }
1590 assert(count == 0, "just checking");
1591 }
1592 return h_result();
1593 }
1594
1595
1596 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1597 // of java.lang.reflect.Constructor
1598
1599 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1600 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1601 int slot = java_lang_reflect_Method::slot(method_mirror);
1602 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1603 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1604
1605 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1606 BasicType rtype;
1607 if (java_lang_Class::is_primitive(return_type_mirror)) {
1608 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1609 } else {
1610 rtype = T_OBJECT;
1611 }
1612
1613 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1614 methodOop m = klass->method_with_idnum(slot);
1615 if (m == NULL) {
1616 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1617 }
1618 methodHandle method(THREAD, m);
1619
1620 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1621 }
1622
1623
1624 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1625 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1626 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1627 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1628 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1629
1630 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(mirror));
1631 methodOop m = klass->method_with_idnum(slot);
1632 if (m == NULL) {
1633 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1634 }
1635 methodHandle method(THREAD, m);
1636 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1637
1638 // Make sure klass gets initialize
1639 klass->initialize(CHECK_NULL);
1640
1641 // Create new instance (the receiver)
1642 klass->check_valid_for_instantiation(false, CHECK_NULL);
1643 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1644
1645 // Ignore result from call and return receiver
1646 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1647 return receiver();
1648 }
1649
1650
1651 #endif /* SUPPORT_OLD_REFLECTION */