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src/share/vm/runtime/reflection.cpp@a7509aff1b06
src/share/vm/runtime/reflection.cpp
Mon, 17 Sep 2012 07:36:31 -0400
- author
- dholmes
- date
- Mon, 17 Sep 2012 07:36:31 -0400
- changeset 4077
- a7509aff1b06
- parent 4037
- da91efe96a93
- child 4142
- d8ce2825b193
- permissions
- -rw-r--r--
7194254: jstack reports wrong thread priorities
Reviewed-by: dholmes, sla, fparain
Contributed-by: Dmytro Sheyko <dmytro_sheyko@hotmail.com>
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 InstanceKlass::cast(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 = InstanceKlass::cast(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 = Klass::cast(caller)->external_name();
74 const char * to = Klass::cast(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 (Klass::cast(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::cast(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::cast(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::cast(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::cast(klass)->oop_is_typeArray()) {
399 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
400 } else {
401 result2 = Klass::cast(objArrayKlass::cast(klass)->element_klass())->java_mirror();
402 }
403 } else {
404 Klass* lower_dim = arrayKlass::cast(klass)->lower_dimension();
405 assert(Klass::cast(lower_dim)->oop_is_array(), "just checking");
406 result2 = Klass::cast(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 (!Klass::cast(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 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
472 return true;
473 }
475 return can_relax_access_check_for(current_class, new_class, classloader_only);
476 }
478 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) {
479 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
480 for (;;) {
481 Klass* hc = (Klass*) ik->host_klass();
482 if (hc == NULL) return false;
483 if (hc == host_klass) return true;
484 ik = InstanceKlass::cast(hc);
486 // There's no way to make a host class loop short of patching memory.
487 // Therefore there cannot be a loop here unles there's another bug.
488 // Still, let's check for it.
489 assert(--inf_loop_check > 0, "no host_klass loop");
490 }
491 }
493 bool Reflection::can_relax_access_check_for(
494 Klass* accessor, Klass* accessee, bool classloader_only) {
495 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
496 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
498 // If either is on the other's host_klass chain, access is OK,
499 // because one is inside the other.
500 if (under_host_klass(accessor_ik, accessee) ||
501 under_host_klass(accessee_ik, accessor))
502 return true;
504 if (RelaxAccessControlCheck ||
505 (accessor_ik->major_version() < JAVA_1_5_VERSION &&
506 accessee_ik->major_version() < JAVA_1_5_VERSION)) {
507 return classloader_only &&
508 Verifier::relax_verify_for(accessor_ik->class_loader()) &&
509 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
510 accessor_ik->class_loader() == accessee_ik->class_loader();
511 } else {
512 return false;
513 }
514 }
516 bool Reflection::verify_field_access(Klass* current_class,
517 Klass* resolved_class,
518 Klass* field_class,
519 AccessFlags access,
520 bool classloader_only,
521 bool protected_restriction) {
522 // Verify that current_class can access a field of field_class, where that
523 // field's access bits are "access". We assume that we've already verified
524 // that current_class can access field_class.
525 //
526 // If the classloader_only flag is set, we automatically allow any accesses
527 // in which current_class doesn't have a classloader.
528 //
529 // "resolved_class" is the runtime type of "field_class". Sometimes we don't
530 // need this distinction (e.g. if all we have is the runtime type, or during
531 // class file parsing when we only care about the static type); in that case
532 // callers should ensure that resolved_class == field_class.
533 //
534 if ((current_class == NULL) ||
535 (current_class == field_class) ||
536 access.is_public()) {
537 return true;
538 }
540 if (access.is_protected()) {
541 if (!protected_restriction) {
542 // See if current_class is a subclass of field_class
543 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
544 if (access.is_static() || // static fields are ok, see 6622385
545 current_class == resolved_class ||
546 field_class == resolved_class ||
547 Klass::cast(current_class)->is_subclass_of(resolved_class) ||
548 Klass::cast(resolved_class)->is_subclass_of(current_class)) {
549 return true;
550 }
551 }
552 }
553 }
555 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
556 return true;
557 }
559 // New (1.4) reflection implementation. Allow all accesses from
560 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
561 if ( JDK_Version::is_gte_jdk14x_version()
562 && UseNewReflection
563 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
564 return true;
565 }
567 return can_relax_access_check_for(
568 current_class, field_class, classloader_only);
569 }
572 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) {
573 return InstanceKlass::cast(class1)->is_same_class_package(class2);
574 }
576 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) {
577 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
578 }
581 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
582 // throw an incompatible class change exception
583 // If inner_is_member, require the inner to be a member of the outer.
584 // If !inner_is_member, require the inner to be anonymous (a non-member).
585 // Caller is responsible for figuring out in advance which case must be true.
586 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
587 bool inner_is_member, TRAPS) {
588 InnerClassesIterator iter(outer);
589 constantPoolHandle cp (THREAD, outer->constants());
590 for (; !iter.done(); iter.next()) {
591 int ioff = iter.inner_class_info_index();
592 int ooff = iter.outer_class_info_index();
594 if (inner_is_member && ioff != 0 && ooff != 0) {
595 Klass* o = cp->klass_at(ooff, CHECK);
596 if (o == outer()) {
597 Klass* i = cp->klass_at(ioff, CHECK);
598 if (i == inner()) {
599 return;
600 }
601 }
602 }
603 if (!inner_is_member && ioff != 0 && ooff == 0 &&
604 cp->klass_name_at_matches(inner, ioff)) {
605 Klass* i = cp->klass_at(ioff, CHECK);
606 if (i == inner()) {
607 return;
608 }
609 }
610 }
612 // 'inner' not declared as an inner klass in outer
613 ResourceMark rm(THREAD);
614 Exceptions::fthrow(
615 THREAD_AND_LOCATION,
616 vmSymbols::java_lang_IncompatibleClassChangeError(),
617 "%s and %s disagree on InnerClasses attribute",
618 outer->external_name(),
619 inner->external_name()
620 );
621 }
623 // Utility method converting a single SignatureStream element into java.lang.Class instance
625 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
626 switch (ss->type()) {
627 default:
628 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
629 return java_lang_Class::primitive_mirror(ss->type());
630 case T_OBJECT:
631 case T_ARRAY:
632 Symbol* name = ss->as_symbol(CHECK_NULL);
633 oop loader = InstanceKlass::cast(method->method_holder())->class_loader();
634 oop protection_domain = InstanceKlass::cast(method->method_holder())->protection_domain();
635 Klass* k = SystemDictionary::resolve_or_fail(
636 name,
637 Handle(THREAD, loader),
638 Handle(THREAD, protection_domain),
639 true, CHECK_NULL);
640 if (TraceClassResolution) {
641 trace_class_resolution(k);
642 }
643 return k->java_mirror();
644 };
645 }
648 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
649 // Allocate array holding parameter types (java.lang.Class instances)
650 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
651 objArrayHandle mirrors (THREAD, m);
652 int index = 0;
653 // Collect parameter types
654 ResourceMark rm(THREAD);
655 Symbol* signature = method->signature();
656 SignatureStream ss(signature);
657 while (!ss.at_return_type()) {
658 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
659 mirrors->obj_at_put(index++, mirror);
660 ss.next();
661 }
662 assert(index == parameter_count, "invalid parameter count");
663 if (return_type != NULL) {
664 // Collect return type as well
665 assert(ss.at_return_type(), "return type should be present");
666 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
667 }
668 return mirrors;
669 }
671 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
672 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
673 }
676 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
677 // Basic types
678 BasicType type = vmSymbols::signature_type(signature);
679 if (type != T_OBJECT) {
680 return Handle(THREAD, Universe::java_mirror(type));
681 }
683 oop loader = InstanceKlass::cast(k())->class_loader();
684 oop protection_domain = Klass::cast(k())->protection_domain();
685 Klass* result = SystemDictionary::resolve_or_fail(signature,
686 Handle(THREAD, loader),
687 Handle(THREAD, protection_domain),
688 true, CHECK_(Handle()));
690 if (TraceClassResolution) {
691 trace_class_resolution(result);
692 }
694 oop nt = Klass::cast(result)->java_mirror();
695 return Handle(THREAD, nt);
696 }
699 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
700 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
701 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
702 assert(!method()->is_initializer() ||
703 (for_constant_pool_access && method()->is_static()) ||
704 (method()->name() == vmSymbols::class_initializer_name()
705 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
706 instanceKlassHandle holder (THREAD, method->method_holder());
707 int slot = method->method_idnum();
709 Symbol* signature = method->signature();
710 int parameter_count = ArgumentCount(signature).size();
711 oop return_type_oop = NULL;
712 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
713 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
715 Handle return_type(THREAD, return_type_oop);
717 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
719 if (exception_types.is_null()) return NULL;
721 Symbol* method_name = method->name();
722 Handle name;
723 if (intern_name) {
724 // intern_name is only true with UseNewReflection
725 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
726 name = Handle(THREAD, name_oop);
727 } else {
728 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
729 }
730 if (name == NULL) return NULL;
732 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
734 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
736 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
737 java_lang_reflect_Method::set_slot(mh(), slot);
738 java_lang_reflect_Method::set_name(mh(), name());
739 java_lang_reflect_Method::set_return_type(mh(), return_type());
740 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
741 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
742 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
743 java_lang_reflect_Method::set_override(mh(), false);
744 if (java_lang_reflect_Method::has_signature_field() &&
745 method->generic_signature() != NULL) {
746 Symbol* gs = method->generic_signature();
747 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
748 java_lang_reflect_Method::set_signature(mh(), sig());
749 }
750 if (java_lang_reflect_Method::has_annotations_field()) {
751 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
752 java_lang_reflect_Method::set_annotations(mh(), an_oop);
753 }
754 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
755 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
756 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
757 }
758 if (java_lang_reflect_Method::has_annotation_default_field()) {
759 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
760 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
761 }
762 return mh();
763 }
766 oop Reflection::new_constructor(methodHandle method, TRAPS) {
767 assert(method()->is_initializer(), "should call new_method instead");
769 instanceKlassHandle holder (THREAD, method->method_holder());
770 int slot = method->method_idnum();
772 Symbol* signature = method->signature();
773 int parameter_count = ArgumentCount(signature).size();
774 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
775 if (parameter_types.is_null()) return NULL;
777 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
778 if (exception_types.is_null()) return NULL;
780 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
782 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
784 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
785 java_lang_reflect_Constructor::set_slot(ch(), slot);
786 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
787 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
788 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
789 java_lang_reflect_Constructor::set_override(ch(), false);
790 if (java_lang_reflect_Constructor::has_signature_field() &&
791 method->generic_signature() != NULL) {
792 Symbol* gs = method->generic_signature();
793 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
794 java_lang_reflect_Constructor::set_signature(ch(), sig());
795 }
796 if (java_lang_reflect_Constructor::has_annotations_field()) {
797 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
798 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
799 }
800 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
801 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
802 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
803 }
804 return ch();
805 }
808 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
809 Symbol* field_name = fd->name();
810 Handle name;
811 if (intern_name) {
812 // intern_name is only true with UseNewReflection
813 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
814 name = Handle(THREAD, name_oop);
815 } else {
816 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
817 }
818 Symbol* signature = fd->signature();
819 instanceKlassHandle holder (THREAD, fd->field_holder());
820 Handle type = new_type(signature, holder, CHECK_NULL);
821 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
823 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
824 java_lang_reflect_Field::set_slot(rh(), fd->index());
825 java_lang_reflect_Field::set_name(rh(), name());
826 java_lang_reflect_Field::set_type(rh(), type());
827 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
828 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
829 java_lang_reflect_Field::set_override(rh(), false);
830 if (java_lang_reflect_Field::has_signature_field() &&
831 fd->has_generic_signature()) {
832 Symbol* gs = fd->generic_signature();
833 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
834 java_lang_reflect_Field::set_signature(rh(), sig());
835 }
836 if (java_lang_reflect_Field::has_annotations_field()) {
837 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
838 java_lang_reflect_Field::set_annotations(rh(), an_oop);
839 }
840 return rh();
841 }
844 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
845 KlassHandle recv_klass, Handle receiver, TRAPS) {
846 assert(!method.is_null() , "method should not be null");
848 CallInfo info;
849 Symbol* signature = method->signature();
850 Symbol* name = method->name();
851 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
852 name, signature,
853 KlassHandle(), false, true,
854 CHECK_(methodHandle()));
855 return info.selected_method();
856 }
859 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
860 Handle receiver, bool override, objArrayHandle ptypes,
861 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
862 ResourceMark rm(THREAD);
864 methodHandle method; // actual method to invoke
865 KlassHandle target_klass; // target klass, receiver's klass for non-static
867 // Ensure klass is initialized
868 klass->initialize(CHECK_NULL);
870 bool is_static = reflected_method->is_static();
871 if (is_static) {
872 // ignore receiver argument
873 method = reflected_method;
874 target_klass = klass;
875 } else {
876 // check for null receiver
877 if (receiver.is_null()) {
878 THROW_0(vmSymbols::java_lang_NullPointerException());
879 }
880 // Check class of receiver against class declaring method
881 if (!receiver->is_a(klass())) {
882 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
883 }
884 // target klass is receiver's klass
885 target_klass = KlassHandle(THREAD, receiver->klass());
886 // no need to resolve if method is private or <init>
887 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
888 method = reflected_method;
889 } else {
890 // resolve based on the receiver
891 if (InstanceKlass::cast(reflected_method->method_holder())->is_interface()) {
892 // resolve interface call
893 if (ReflectionWrapResolutionErrors) {
894 // new default: 6531596
895 // Match resolution errors with those thrown due to reflection inlining
896 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
897 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
898 if (HAS_PENDING_EXCEPTION) {
899 // Method resolution threw an exception; wrap it in an InvocationTargetException
900 oop resolution_exception = PENDING_EXCEPTION;
901 CLEAR_PENDING_EXCEPTION;
902 JavaCallArguments args(Handle(THREAD, resolution_exception));
903 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
904 vmSymbols::throwable_void_signature(),
905 &args);
906 }
907 } else {
908 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
909 }
910 } else {
911 // if the method can be overridden, we resolve using the vtable index.
912 int index = reflected_method->vtable_index();
913 method = reflected_method;
914 if (index != Method::nonvirtual_vtable_index) {
915 // target_klass might be an arrayKlassOop but all vtables start at
916 // the same place. The cast is to avoid virtual call and assertion.
917 InstanceKlass* inst = (InstanceKlass*)target_klass();
918 method = methodHandle(THREAD, inst->method_at_vtable(index));
919 }
920 if (!method.is_null()) {
921 // Check for abstract methods as well
922 if (method->is_abstract()) {
923 // new default: 6531596
924 if (ReflectionWrapResolutionErrors) {
925 ResourceMark rm(THREAD);
926 Handle h_origexception = Exceptions::new_exception(THREAD,
927 vmSymbols::java_lang_AbstractMethodError(),
928 Method::name_and_sig_as_C_string(Klass::cast(target_klass()),
929 method->name(),
930 method->signature()));
931 JavaCallArguments args(h_origexception);
932 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
933 vmSymbols::throwable_void_signature(),
934 &args);
935 } else {
936 ResourceMark rm(THREAD);
937 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
938 Method::name_and_sig_as_C_string(Klass::cast(target_klass()),
939 method->name(),
940 method->signature()));
941 }
942 }
943 }
944 }
945 }
946 }
948 // I believe this is a ShouldNotGetHere case which requires
949 // an internal vtable bug. If you ever get this please let Karen know.
950 if (method.is_null()) {
951 ResourceMark rm(THREAD);
952 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
953 Method::name_and_sig_as_C_string(Klass::cast(klass()),
954 reflected_method->name(),
955 reflected_method->signature()));
956 }
958 // In the JDK 1.4 reflection implementation, the security check is
959 // done at the Java level
960 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
962 // Access checking (unless overridden by Method)
963 if (!override) {
964 if (!(klass->is_public() && reflected_method->is_public())) {
965 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
966 if (!access) {
967 return NULL; // exception
968 }
969 }
970 }
972 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
974 assert(ptypes->is_objArray(), "just checking");
975 int args_len = args.is_null() ? 0 : args->length();
976 // Check number of arguments
977 if (ptypes->length() != args_len) {
978 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
979 }
981 // Create object to contain parameters for the JavaCall
982 JavaCallArguments java_args(method->size_of_parameters());
984 if (!is_static) {
985 java_args.push_oop(receiver);
986 }
988 for (int i = 0; i < args_len; i++) {
989 oop type_mirror = ptypes->obj_at(i);
990 oop arg = args->obj_at(i);
991 if (java_lang_Class::is_primitive(type_mirror)) {
992 jvalue value;
993 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
994 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
995 if (ptype != atype) {
996 widen(&value, atype, ptype, CHECK_NULL);
997 }
998 switch (ptype) {
999 case T_BOOLEAN: java_args.push_int(value.z); break;
1000 case T_CHAR: java_args.push_int(value.c); break;
1001 case T_BYTE: java_args.push_int(value.b); break;
1002 case T_SHORT: java_args.push_int(value.s); break;
1003 case T_INT: java_args.push_int(value.i); break;
1004 case T_LONG: java_args.push_long(value.j); break;
1005 case T_FLOAT: java_args.push_float(value.f); break;
1006 case T_DOUBLE: java_args.push_double(value.d); break;
1007 default:
1008 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1009 }
1010 } else {
1011 if (arg != NULL) {
1012 Klass* k = java_lang_Class::as_Klass(type_mirror);
1013 if (!arg->is_a(k)) {
1014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1015 }
1016 }
1017 Handle arg_handle(THREAD, arg); // Create handle for argument
1018 java_args.push_oop(arg_handle); // Push handle
1019 }
1020 }
1022 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1024 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1025 // oop (i.e., NOT as an handle)
1026 JavaValue result(rtype);
1027 JavaCalls::call(&result, method, &java_args, THREAD);
1029 if (HAS_PENDING_EXCEPTION) {
1030 // Method threw an exception; wrap it in an InvocationTargetException
1031 oop target_exception = PENDING_EXCEPTION;
1032 CLEAR_PENDING_EXCEPTION;
1033 JavaCallArguments args(Handle(THREAD, target_exception));
1034 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1035 vmSymbols::throwable_void_signature(),
1036 &args);
1037 } else {
1038 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1039 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1040 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1041 }
1042 }
1045 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1046 switch (narrow_type) {
1047 case T_BOOLEAN:
1048 value->z = (jboolean) value->i;
1049 return;
1050 case T_BYTE:
1051 value->b = (jbyte) value->i;
1052 return;
1053 case T_CHAR:
1054 value->c = (jchar) value->i;
1055 return;
1056 case T_SHORT:
1057 value->s = (jshort) value->i;
1058 return;
1059 default:
1060 break; // fail
1061 }
1062 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1063 }
1066 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1067 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1068 return java_lang_Class::primitive_type(basic_type_mirror);
1069 }
1071 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1072 // of java.lang.reflect.Constructor
1074 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1075 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1076 int slot = java_lang_reflect_Method::slot(method_mirror);
1077 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1078 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1080 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1081 BasicType rtype;
1082 if (java_lang_Class::is_primitive(return_type_mirror)) {
1083 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1084 } else {
1085 rtype = T_OBJECT;
1086 }
1088 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1089 Method* m = klass->method_with_idnum(slot);
1090 if (m == NULL) {
1091 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1092 }
1093 methodHandle method(THREAD, m);
1095 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1096 }
1099 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1100 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1101 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1102 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1103 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1105 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1106 Method* m = klass->method_with_idnum(slot);
1107 if (m == NULL) {
1108 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1109 }
1110 methodHandle method(THREAD, m);
1111 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1113 // Make sure klass gets initialize
1114 klass->initialize(CHECK_NULL);
1116 // Create new instance (the receiver)
1117 klass->check_valid_for_instantiation(false, CHECK_NULL);
1118 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1120 // Ignore result from call and return receiver
1121 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1122 return receiver();
1123 }
