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src/share/vm/runtime/reflection.cpp@b5cb079ecaa4
src/share/vm/runtime/reflection.cpp
Sun, 03 Feb 2013 22:43:57 +0100
- author
- ewendeli
- date
- Sun, 03 Feb 2013 22:43:57 +0100
- changeset 4703
- b5cb079ecaa4
- parent 4431
- f9eb431c3efe
- child 5210
- a589c78a8811
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "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 "runtime/arguments.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/javaCalls.hpp"
42 #include "runtime/reflection.hpp"
43 #include "runtime/reflectionUtils.hpp"
44 #include "runtime/signature.hpp"
45 #include "runtime/vframe.hpp"
47 #define JAVA_1_5_VERSION 49
49 static void trace_class_resolution(Klass* to_class) {
50 ResourceMark rm;
51 int line_number = -1;
52 const char * source_file = NULL;
53 Klass* caller = NULL;
54 JavaThread* jthread = JavaThread::current();
55 if (jthread->has_last_Java_frame()) {
56 vframeStream vfst(jthread);
57 // skip over any frames belonging to java.lang.Class
58 while (!vfst.at_end() &&
59 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
60 vfst.next();
61 }
62 if (!vfst.at_end()) {
63 // this frame is a likely suspect
64 caller = vfst.method()->method_holder();
65 line_number = vfst.method()->line_number_from_bci(vfst.bci());
66 Symbol* s = vfst.method()->method_holder()->source_file_name();
67 if (s != NULL) {
68 source_file = s->as_C_string();
69 }
70 }
71 }
72 if (caller != NULL) {
73 const char * from = caller->external_name();
74 const char * to = to_class->external_name();
75 // print in a single call to reduce interleaving between threads
76 if (source_file != NULL) {
77 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
78 } else {
79 tty->print("RESOLVE %s %s (reflection)\n", from, to);
80 }
81 }
82 }
85 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
86 if (type == T_VOID) {
87 return NULL;
88 }
89 if (type == T_OBJECT || type == T_ARRAY) {
90 // regular objects are not boxed
91 return (oop) value->l;
92 }
93 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
94 if (result == NULL) {
95 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
96 }
97 return result;
98 }
101 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
102 if (box == NULL) {
103 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
104 }
105 return java_lang_boxing_object::get_value(box, value);
106 }
108 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
109 // Note: box is really the unboxed oop. It might even be a Short, etc.!
110 value->l = (jobject) box;
111 return T_OBJECT;
112 }
115 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
116 assert(wide_type != current_type, "widen should not be called with identical types");
117 switch (wide_type) {
118 case T_BOOLEAN:
119 case T_BYTE:
120 case T_CHAR:
121 break; // fail
122 case T_SHORT:
123 switch (current_type) {
124 case T_BYTE:
125 value->s = (jshort) value->b;
126 return;
127 }
128 break; // fail
129 case T_INT:
130 switch (current_type) {
131 case T_BYTE:
132 value->i = (jint) value->b;
133 return;
134 case T_CHAR:
135 value->i = (jint) value->c;
136 return;
137 case T_SHORT:
138 value->i = (jint) value->s;
139 return;
140 }
141 break; // fail
142 case T_LONG:
143 switch (current_type) {
144 case T_BYTE:
145 value->j = (jlong) value->b;
146 return;
147 case T_CHAR:
148 value->j = (jlong) value->c;
149 return;
150 case T_SHORT:
151 value->j = (jlong) value->s;
152 return;
153 case T_INT:
154 value->j = (jlong) value->i;
155 return;
156 }
157 break; // fail
158 case T_FLOAT:
159 switch (current_type) {
160 case T_BYTE:
161 value->f = (jfloat) value->b;
162 return;
163 case T_CHAR:
164 value->f = (jfloat) value->c;
165 return;
166 case T_SHORT:
167 value->f = (jfloat) value->s;
168 return;
169 case T_INT:
170 value->f = (jfloat) value->i;
171 return;
172 case T_LONG:
173 value->f = (jfloat) value->j;
174 return;
175 }
176 break; // fail
177 case T_DOUBLE:
178 switch (current_type) {
179 case T_BYTE:
180 value->d = (jdouble) value->b;
181 return;
182 case T_CHAR:
183 value->d = (jdouble) value->c;
184 return;
185 case T_SHORT:
186 value->d = (jdouble) value->s;
187 return;
188 case T_INT:
189 value->d = (jdouble) value->i;
190 return;
191 case T_FLOAT:
192 value->d = (jdouble) value->f;
193 return;
194 case T_LONG:
195 value->d = (jdouble) value->j;
196 return;
197 }
198 break; // fail
199 default:
200 break; // fail
201 }
202 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
203 }
206 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
207 if (!a->is_within_bounds(index)) {
208 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
209 }
210 if (a->is_objArray()) {
211 value->l = (jobject) objArrayOop(a)->obj_at(index);
212 return T_OBJECT;
213 } else {
214 assert(a->is_typeArray(), "just checking");
215 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
216 switch (type) {
217 case T_BOOLEAN:
218 value->z = typeArrayOop(a)->bool_at(index);
219 break;
220 case T_CHAR:
221 value->c = typeArrayOop(a)->char_at(index);
222 break;
223 case T_FLOAT:
224 value->f = typeArrayOop(a)->float_at(index);
225 break;
226 case T_DOUBLE:
227 value->d = typeArrayOop(a)->double_at(index);
228 break;
229 case T_BYTE:
230 value->b = typeArrayOop(a)->byte_at(index);
231 break;
232 case T_SHORT:
233 value->s = typeArrayOop(a)->short_at(index);
234 break;
235 case T_INT:
236 value->i = typeArrayOop(a)->int_at(index);
237 break;
238 case T_LONG:
239 value->j = typeArrayOop(a)->long_at(index);
240 break;
241 default:
242 return T_ILLEGAL;
243 }
244 return type;
245 }
246 }
249 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
250 if (!a->is_within_bounds(index)) {
251 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
252 }
253 if (a->is_objArray()) {
254 if (value_type == T_OBJECT) {
255 oop obj = (oop) value->l;
256 if (obj != NULL) {
257 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
258 if (!obj->is_a(element_klass)) {
259 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
260 }
261 }
262 objArrayOop(a)->obj_at_put(index, obj);
263 }
264 } else {
265 assert(a->is_typeArray(), "just checking");
266 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
267 if (array_type != value_type) {
268 // The widen operation can potentially throw an exception, but cannot block,
269 // so typeArrayOop a is safe if the call succeeds.
270 widen(value, value_type, array_type, CHECK);
271 }
272 switch (array_type) {
273 case T_BOOLEAN:
274 typeArrayOop(a)->bool_at_put(index, value->z);
275 break;
276 case T_CHAR:
277 typeArrayOop(a)->char_at_put(index, value->c);
278 break;
279 case T_FLOAT:
280 typeArrayOop(a)->float_at_put(index, value->f);
281 break;
282 case T_DOUBLE:
283 typeArrayOop(a)->double_at_put(index, value->d);
284 break;
285 case T_BYTE:
286 typeArrayOop(a)->byte_at_put(index, value->b);
287 break;
288 case T_SHORT:
289 typeArrayOop(a)->short_at_put(index, value->s);
290 break;
291 case T_INT:
292 typeArrayOop(a)->int_at_put(index, value->i);
293 break;
294 case T_LONG:
295 typeArrayOop(a)->long_at_put(index, value->j);
296 break;
297 default:
298 THROW(vmSymbols::java_lang_IllegalArgumentException());
299 }
300 }
301 }
304 Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
305 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
306 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
307 if (type == T_VOID) {
308 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
309 } else {
310 return Universe::typeArrayKlassObj(type);
311 }
312 }
315 oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) {
316 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type();
317 return Universe::java_mirror(type);
318 }
321 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
322 if (element_mirror == NULL) {
323 THROW_0(vmSymbols::java_lang_NullPointerException());
324 }
325 if (length < 0) {
326 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
327 }
328 if (java_lang_Class::is_primitive(element_mirror)) {
329 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
330 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
331 } else {
332 Klass* k = java_lang_Class::as_Klass(element_mirror);
333 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
334 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
335 }
336 return oopFactory::new_objArray(k, length, THREAD);
337 }
338 }
341 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
342 assert(dim_array->is_typeArray(), "just checking");
343 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
345 if (element_mirror == NULL) {
346 THROW_0(vmSymbols::java_lang_NullPointerException());
347 }
349 int len = dim_array->length();
350 if (len <= 0 || len > MAX_DIM) {
351 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
352 }
354 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
355 for (int i = 0; i < len; i++) {
356 int d = dim_array->int_at(i);
357 if (d < 0) {
358 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
359 }
360 dimensions[i] = d;
361 }
363 Klass* klass;
364 int dim = len;
365 if (java_lang_Class::is_primitive(element_mirror)) {
366 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
367 } else {
368 klass = java_lang_Class::as_Klass(element_mirror);
369 if (klass->oop_is_array()) {
370 int k_dim = ArrayKlass::cast(klass)->dimension();
371 if (k_dim + len > MAX_DIM) {
372 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
373 }
374 dim += k_dim;
375 }
376 }
377 klass = klass->array_klass(dim, CHECK_NULL);
378 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, THREAD);
379 assert(obj->is_array(), "just checking");
380 return arrayOop(obj);
381 }
384 oop Reflection::array_component_type(oop mirror, TRAPS) {
385 if (java_lang_Class::is_primitive(mirror)) {
386 return NULL;
387 }
389 Klass* klass = java_lang_Class::as_Klass(mirror);
390 if (!klass->oop_is_array()) {
391 return NULL;
392 }
394 oop result = ArrayKlass::cast(klass)->component_mirror();
395 #ifdef ASSERT
396 oop result2 = NULL;
397 if (ArrayKlass::cast(klass)->dimension() == 1) {
398 if (klass->oop_is_typeArray()) {
399 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
400 } else {
401 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror();
402 }
403 } else {
404 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension();
405 assert(lower_dim->oop_is_array(), "just checking");
406 result2 = lower_dim->java_mirror();
407 }
408 assert(result == result2, "results must be consistent");
409 #endif //ASSERT
410 return result;
411 }
414 bool Reflection::reflect_check_access(Klass* field_class, AccessFlags acc, Klass* target_class, bool is_method_invoke, TRAPS) {
415 // field_class : declaring class
416 // acc : declared field access
417 // target_class : for protected
419 // Check if field or method is accessible to client. Throw an
420 // IllegalAccessException and return false if not.
422 // The "client" is the class associated with the nearest real frame
423 // getCallerClass already skips Method.invoke frames, so pass 0 in
424 // that case (same as classic).
425 ResourceMark rm(THREAD);
426 assert(THREAD->is_Java_thread(), "sanity check");
427 Klass* client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
429 if (client_class != field_class) {
430 if (!verify_class_access(client_class, field_class, false)
431 || !verify_field_access(client_class,
432 field_class,
433 field_class,
434 acc,
435 false)) {
436 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
437 }
438 }
440 // Additional test for protected members: JLS 6.6.2
442 if (acc.is_protected()) {
443 if (target_class != client_class) {
444 if (!is_same_class_package(client_class, field_class)) {
445 if (!target_class->is_subclass_of(client_class)) {
446 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
447 }
448 }
449 }
450 }
452 // Passed all tests
453 return true;
454 }
457 bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) {
458 // Verify that current_class can access new_class. If the classloader_only
459 // flag is set, we automatically allow any accesses in which current_class
460 // doesn't have a classloader.
461 if ((current_class == NULL) ||
462 (current_class == new_class) ||
463 (InstanceKlass::cast(new_class)->is_public()) ||
464 is_same_class_package(current_class, new_class)) {
465 return true;
466 }
467 // New (1.4) reflection implementation. Allow all accesses from
468 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
469 if ( JDK_Version::is_gte_jdk14x_version()
470 && UseNewReflection
471 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
472 return true;
473 }
475 // Also allow all accesses from
476 // java/lang/invoke/MagicLambdaImpl subclasses to succeed trivially.
477 if (current_class->is_subclass_of(SystemDictionary::lambda_MagicLambdaImpl_klass())) {
478 return true;
479 }
481 return can_relax_access_check_for(current_class, new_class, classloader_only);
482 }
484 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) {
485 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
486 for (;;) {
487 Klass* hc = (Klass*) ik->host_klass();
488 if (hc == NULL) return false;
489 if (hc == host_klass) return true;
490 ik = InstanceKlass::cast(hc);
492 // There's no way to make a host class loop short of patching memory.
493 // Therefore there cannot be a loop here unles there's another bug.
494 // Still, let's check for it.
495 assert(--inf_loop_check > 0, "no host_klass loop");
496 }
497 }
499 bool Reflection::can_relax_access_check_for(
500 Klass* accessor, Klass* accessee, bool classloader_only) {
501 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
502 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
504 // If either is on the other's host_klass chain, access is OK,
505 // because one is inside the other.
506 if (under_host_klass(accessor_ik, accessee) ||
507 under_host_klass(accessee_ik, accessor))
508 return true;
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 }
522 bool Reflection::verify_field_access(Klass* current_class,
523 Klass* resolved_class,
524 Klass* 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 }
546 if (access.is_protected()) {
547 if (!protected_restriction) {
548 // See if current_class is a subclass of field_class
549 if (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 current_class->is_subclass_of(resolved_class) ||
554 resolved_class->is_subclass_of(current_class)) {
555 return true;
556 }
557 }
558 }
559 }
561 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
562 return true;
563 }
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 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
570 return true;
571 }
573 // Also allow all accesses from
574 // java/lang/invoke/MagicLambdaImpl subclasses to succeed trivially.
575 if (current_class->is_subclass_of(SystemDictionary::lambda_MagicLambdaImpl_klass())) {
576 return true;
577 }
579 return can_relax_access_check_for(
580 current_class, field_class, classloader_only);
581 }
584 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) {
585 return InstanceKlass::cast(class1)->is_same_class_package(class2);
586 }
588 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) {
589 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
590 }
593 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
594 // throw an incompatible class change exception
595 // If inner_is_member, require the inner to be a member of the outer.
596 // If !inner_is_member, require the inner to be anonymous (a non-member).
597 // Caller is responsible for figuring out in advance which case must be true.
598 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
599 bool inner_is_member, TRAPS) {
600 InnerClassesIterator iter(outer);
601 constantPoolHandle cp (THREAD, outer->constants());
602 for (; !iter.done(); iter.next()) {
603 int ioff = iter.inner_class_info_index();
604 int ooff = iter.outer_class_info_index();
606 if (inner_is_member && ioff != 0 && ooff != 0) {
607 Klass* o = cp->klass_at(ooff, CHECK);
608 if (o == outer()) {
609 Klass* i = cp->klass_at(ioff, CHECK);
610 if (i == inner()) {
611 return;
612 }
613 }
614 }
615 if (!inner_is_member && ioff != 0 && ooff == 0 &&
616 cp->klass_name_at_matches(inner, ioff)) {
617 Klass* i = cp->klass_at(ioff, CHECK);
618 if (i == inner()) {
619 return;
620 }
621 }
622 }
624 // 'inner' not declared as an inner klass in outer
625 ResourceMark rm(THREAD);
626 Exceptions::fthrow(
627 THREAD_AND_LOCATION,
628 vmSymbols::java_lang_IncompatibleClassChangeError(),
629 "%s and %s disagree on InnerClasses attribute",
630 outer->external_name(),
631 inner->external_name()
632 );
633 }
635 // Utility method converting a single SignatureStream element into java.lang.Class instance
637 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
638 switch (ss->type()) {
639 default:
640 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
641 return java_lang_Class::primitive_mirror(ss->type());
642 case T_OBJECT:
643 case T_ARRAY:
644 Symbol* name = ss->as_symbol(CHECK_NULL);
645 oop loader = method->method_holder()->class_loader();
646 oop protection_domain = method->method_holder()->protection_domain();
647 Klass* k = SystemDictionary::resolve_or_fail(
648 name,
649 Handle(THREAD, loader),
650 Handle(THREAD, protection_domain),
651 true, CHECK_NULL);
652 if (TraceClassResolution) {
653 trace_class_resolution(k);
654 }
655 return k->java_mirror();
656 };
657 }
660 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
661 // Allocate array holding parameter types (java.lang.Class instances)
662 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
663 objArrayHandle mirrors (THREAD, m);
664 int index = 0;
665 // Collect parameter types
666 ResourceMark rm(THREAD);
667 Symbol* signature = method->signature();
668 SignatureStream ss(signature);
669 while (!ss.at_return_type()) {
670 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
671 mirrors->obj_at_put(index++, mirror);
672 ss.next();
673 }
674 assert(index == parameter_count, "invalid parameter count");
675 if (return_type != NULL) {
676 // Collect return type as well
677 assert(ss.at_return_type(), "return type should be present");
678 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
679 }
680 return mirrors;
681 }
683 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
684 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
685 }
688 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
689 // Basic types
690 BasicType type = vmSymbols::signature_type(signature);
691 if (type != T_OBJECT) {
692 return Handle(THREAD, Universe::java_mirror(type));
693 }
695 oop loader = InstanceKlass::cast(k())->class_loader();
696 oop protection_domain = k()->protection_domain();
697 Klass* result = SystemDictionary::resolve_or_fail(signature,
698 Handle(THREAD, loader),
699 Handle(THREAD, protection_domain),
700 true, CHECK_(Handle()));
702 if (TraceClassResolution) {
703 trace_class_resolution(result);
704 }
706 oop nt = result->java_mirror();
707 return Handle(THREAD, nt);
708 }
711 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
712 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
713 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
714 assert(!method()->is_initializer() ||
715 (for_constant_pool_access && method()->is_static()) ||
716 (method()->name() == vmSymbols::class_initializer_name()
717 && method()->method_holder()->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
718 instanceKlassHandle holder (THREAD, method->method_holder());
719 int slot = method->method_idnum();
721 Symbol* signature = method->signature();
722 int parameter_count = ArgumentCount(signature).size();
723 oop return_type_oop = NULL;
724 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
725 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
727 Handle return_type(THREAD, return_type_oop);
729 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
731 if (exception_types.is_null()) return NULL;
733 Symbol* method_name = method->name();
734 Handle name;
735 if (intern_name) {
736 // intern_name is only true with UseNewReflection
737 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
738 name = Handle(THREAD, name_oop);
739 } else {
740 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
741 }
742 if (name == NULL) return NULL;
744 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
746 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
748 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
749 java_lang_reflect_Method::set_slot(mh(), slot);
750 java_lang_reflect_Method::set_name(mh(), name());
751 java_lang_reflect_Method::set_return_type(mh(), return_type());
752 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
753 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
754 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
755 java_lang_reflect_Method::set_override(mh(), false);
756 if (java_lang_reflect_Method::has_signature_field() &&
757 method->generic_signature() != NULL) {
758 Symbol* gs = method->generic_signature();
759 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
760 java_lang_reflect_Method::set_signature(mh(), sig());
761 }
762 if (java_lang_reflect_Method::has_annotations_field()) {
763 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
764 java_lang_reflect_Method::set_annotations(mh(), an_oop);
765 }
766 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
767 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
768 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
769 }
770 if (java_lang_reflect_Method::has_annotation_default_field()) {
771 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
772 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
773 }
774 if (java_lang_reflect_Method::has_type_annotations_field()) {
775 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
776 java_lang_reflect_Method::set_type_annotations(mh(), an_oop);
777 }
778 return mh();
779 }
782 oop Reflection::new_constructor(methodHandle method, TRAPS) {
783 assert(method()->is_initializer(), "should call new_method instead");
785 instanceKlassHandle holder (THREAD, method->method_holder());
786 int slot = method->method_idnum();
788 Symbol* signature = method->signature();
789 int parameter_count = ArgumentCount(signature).size();
790 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
791 if (parameter_types.is_null()) return NULL;
793 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
794 if (exception_types.is_null()) return NULL;
796 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
798 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
800 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
801 java_lang_reflect_Constructor::set_slot(ch(), slot);
802 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
803 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
804 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
805 java_lang_reflect_Constructor::set_override(ch(), false);
806 if (java_lang_reflect_Constructor::has_signature_field() &&
807 method->generic_signature() != NULL) {
808 Symbol* gs = method->generic_signature();
809 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
810 java_lang_reflect_Constructor::set_signature(ch(), sig());
811 }
812 if (java_lang_reflect_Constructor::has_annotations_field()) {
813 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
814 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
815 }
816 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
817 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
818 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
819 }
820 return ch();
821 }
824 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
825 Symbol* field_name = fd->name();
826 Handle name;
827 if (intern_name) {
828 // intern_name is only true with UseNewReflection
829 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
830 name = Handle(THREAD, name_oop);
831 } else {
832 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
833 }
834 Symbol* signature = fd->signature();
835 instanceKlassHandle holder (THREAD, fd->field_holder());
836 Handle type = new_type(signature, holder, CHECK_NULL);
837 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
839 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
840 java_lang_reflect_Field::set_slot(rh(), fd->index());
841 java_lang_reflect_Field::set_name(rh(), name());
842 java_lang_reflect_Field::set_type(rh(), type());
843 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
844 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
845 java_lang_reflect_Field::set_override(rh(), false);
846 if (java_lang_reflect_Field::has_signature_field() &&
847 fd->has_generic_signature()) {
848 Symbol* gs = fd->generic_signature();
849 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
850 java_lang_reflect_Field::set_signature(rh(), sig());
851 }
852 if (java_lang_reflect_Field::has_annotations_field()) {
853 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
854 java_lang_reflect_Field::set_annotations(rh(), an_oop);
855 }
856 if (java_lang_reflect_Field::has_type_annotations_field()) {
857 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL);
858 java_lang_reflect_Field::set_type_annotations(rh(), an_oop);
859 }
860 return rh();
861 }
863 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
864 int flags, TRAPS) {
865 Handle name;
867 // A null symbol here translates to the empty string
868 if(NULL != sym) {
869 name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
870 } else {
871 name = java_lang_String::create_from_str("", CHECK_NULL);
872 }
874 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
875 java_lang_reflect_Parameter::set_name(rh(), name());
876 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
877 java_lang_reflect_Parameter::set_executable(rh(), method());
878 java_lang_reflect_Parameter::set_index(rh(), index);
879 return rh();
880 }
883 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
884 KlassHandle recv_klass, Handle receiver, TRAPS) {
885 assert(!method.is_null() , "method should not be null");
887 CallInfo info;
888 Symbol* signature = method->signature();
889 Symbol* name = method->name();
890 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
891 name, signature,
892 KlassHandle(), false, true,
893 CHECK_(methodHandle()));
894 return info.selected_method();
895 }
898 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
899 Handle receiver, bool override, objArrayHandle ptypes,
900 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
901 ResourceMark rm(THREAD);
903 methodHandle method; // actual method to invoke
904 KlassHandle target_klass; // target klass, receiver's klass for non-static
906 // Ensure klass is initialized
907 klass->initialize(CHECK_NULL);
909 bool is_static = reflected_method->is_static();
910 if (is_static) {
911 // ignore receiver argument
912 method = reflected_method;
913 target_klass = klass;
914 } else {
915 // check for null receiver
916 if (receiver.is_null()) {
917 THROW_0(vmSymbols::java_lang_NullPointerException());
918 }
919 // Check class of receiver against class declaring method
920 if (!receiver->is_a(klass())) {
921 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
922 }
923 // target klass is receiver's klass
924 target_klass = KlassHandle(THREAD, receiver->klass());
925 // no need to resolve if method is private or <init>
926 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
927 method = reflected_method;
928 } else {
929 // resolve based on the receiver
930 if (reflected_method->method_holder()->is_interface()) {
931 // resolve interface call
932 if (ReflectionWrapResolutionErrors) {
933 // new default: 6531596
934 // Match resolution errors with those thrown due to reflection inlining
935 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
936 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
937 if (HAS_PENDING_EXCEPTION) {
938 // Method resolution threw an exception; wrap it in an InvocationTargetException
939 oop resolution_exception = PENDING_EXCEPTION;
940 CLEAR_PENDING_EXCEPTION;
941 JavaCallArguments args(Handle(THREAD, resolution_exception));
942 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
943 vmSymbols::throwable_void_signature(),
944 &args);
945 }
946 } else {
947 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
948 }
949 } else {
950 // if the method can be overridden, we resolve using the vtable index.
951 int index = reflected_method->vtable_index();
952 method = reflected_method;
953 if (index != Method::nonvirtual_vtable_index) {
954 // target_klass might be an arrayKlassOop but all vtables start at
955 // the same place. The cast is to avoid virtual call and assertion.
956 InstanceKlass* inst = (InstanceKlass*)target_klass();
957 method = methodHandle(THREAD, inst->method_at_vtable(index));
958 }
959 if (!method.is_null()) {
960 // Check for abstract methods as well
961 if (method->is_abstract()) {
962 // new default: 6531596
963 if (ReflectionWrapResolutionErrors) {
964 ResourceMark rm(THREAD);
965 Handle h_origexception = Exceptions::new_exception(THREAD,
966 vmSymbols::java_lang_AbstractMethodError(),
967 Method::name_and_sig_as_C_string(target_klass(),
968 method->name(),
969 method->signature()));
970 JavaCallArguments args(h_origexception);
971 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
972 vmSymbols::throwable_void_signature(),
973 &args);
974 } else {
975 ResourceMark rm(THREAD);
976 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
977 Method::name_and_sig_as_C_string(target_klass(),
978 method->name(),
979 method->signature()));
980 }
981 }
982 }
983 }
984 }
985 }
987 // I believe this is a ShouldNotGetHere case which requires
988 // an internal vtable bug. If you ever get this please let Karen know.
989 if (method.is_null()) {
990 ResourceMark rm(THREAD);
991 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
992 Method::name_and_sig_as_C_string(klass(),
993 reflected_method->name(),
994 reflected_method->signature()));
995 }
997 // In the JDK 1.4 reflection implementation, the security check is
998 // done at the Java level
999 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
1001 // Access checking (unless overridden by Method)
1002 if (!override) {
1003 if (!(klass->is_public() && reflected_method->is_public())) {
1004 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
1005 if (!access) {
1006 return NULL; // exception
1007 }
1008 }
1009 }
1011 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
1013 assert(ptypes->is_objArray(), "just checking");
1014 int args_len = args.is_null() ? 0 : args->length();
1015 // Check number of arguments
1016 if (ptypes->length() != args_len) {
1017 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
1018 }
1020 // Create object to contain parameters for the JavaCall
1021 JavaCallArguments java_args(method->size_of_parameters());
1023 if (!is_static) {
1024 java_args.push_oop(receiver);
1025 }
1027 for (int i = 0; i < args_len; i++) {
1028 oop type_mirror = ptypes->obj_at(i);
1029 oop arg = args->obj_at(i);
1030 if (java_lang_Class::is_primitive(type_mirror)) {
1031 jvalue value;
1032 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1033 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
1034 if (ptype != atype) {
1035 widen(&value, atype, ptype, CHECK_NULL);
1036 }
1037 switch (ptype) {
1038 case T_BOOLEAN: java_args.push_int(value.z); break;
1039 case T_CHAR: java_args.push_int(value.c); break;
1040 case T_BYTE: java_args.push_int(value.b); break;
1041 case T_SHORT: java_args.push_int(value.s); break;
1042 case T_INT: java_args.push_int(value.i); break;
1043 case T_LONG: java_args.push_long(value.j); break;
1044 case T_FLOAT: java_args.push_float(value.f); break;
1045 case T_DOUBLE: java_args.push_double(value.d); break;
1046 default:
1047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1048 }
1049 } else {
1050 if (arg != NULL) {
1051 Klass* k = java_lang_Class::as_Klass(type_mirror);
1052 if (!arg->is_a(k)) {
1053 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1054 }
1055 }
1056 Handle arg_handle(THREAD, arg); // Create handle for argument
1057 java_args.push_oop(arg_handle); // Push handle
1058 }
1059 }
1061 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1063 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1064 // oop (i.e., NOT as an handle)
1065 JavaValue result(rtype);
1066 JavaCalls::call(&result, method, &java_args, THREAD);
1068 if (HAS_PENDING_EXCEPTION) {
1069 // Method threw an exception; wrap it in an InvocationTargetException
1070 oop target_exception = PENDING_EXCEPTION;
1071 CLEAR_PENDING_EXCEPTION;
1072 JavaCallArguments args(Handle(THREAD, target_exception));
1073 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1074 vmSymbols::throwable_void_signature(),
1075 &args);
1076 } else {
1077 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1078 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1079 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1080 }
1081 }
1084 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1085 switch (narrow_type) {
1086 case T_BOOLEAN:
1087 value->z = (jboolean) value->i;
1088 return;
1089 case T_BYTE:
1090 value->b = (jbyte) value->i;
1091 return;
1092 case T_CHAR:
1093 value->c = (jchar) value->i;
1094 return;
1095 case T_SHORT:
1096 value->s = (jshort) value->i;
1097 return;
1098 default:
1099 break; // fail
1100 }
1101 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1102 }
1105 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1106 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1107 return java_lang_Class::primitive_type(basic_type_mirror);
1108 }
1110 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1111 // of java.lang.reflect.Constructor
1113 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1114 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1115 int slot = java_lang_reflect_Method::slot(method_mirror);
1116 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1117 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1119 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1120 BasicType rtype;
1121 if (java_lang_Class::is_primitive(return_type_mirror)) {
1122 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1123 } else {
1124 rtype = T_OBJECT;
1125 }
1127 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1128 Method* m = klass->method_with_idnum(slot);
1129 if (m == NULL) {
1130 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1131 }
1132 methodHandle method(THREAD, m);
1134 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1135 }
1138 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1139 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1140 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1141 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1142 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1144 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1145 Method* m = klass->method_with_idnum(slot);
1146 if (m == NULL) {
1147 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1148 }
1149 methodHandle method(THREAD, m);
1150 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1152 // Make sure klass gets initialize
1153 klass->initialize(CHECK_NULL);
1155 // Create new instance (the receiver)
1156 klass->check_valid_for_instantiation(false, CHECK_NULL);
1157 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1159 // Ignore result from call and return receiver
1160 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1161 return receiver();
1162 }
