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src/share/vm/runtime/reflection.cpp@7432b9db36ff
src/share/vm/runtime/reflection.cpp
Thu, 10 May 2012 15:44:19 +0200
- author
- nloodin
- date
- Thu, 10 May 2012 15:44:19 +0200
- changeset 3783
- 7432b9db36ff
- parent 3670
- f7c4174b33ba
- child 3879
- 634b8615a6ba
- permissions
- -rw-r--r--
7165755: OS Information much longer on linux than other platforms
Reviewed-by: sla, dholmes
1 /*
2 * Copyright (c) 1997, 2011, 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 "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"
48 #define JAVA_1_5_VERSION 49
50 static void trace_class_resolution(klassOop to_class) {
51 ResourceMark rm;
52 int line_number = -1;
53 const char * source_file = NULL;
54 klassOop caller = NULL;
55 JavaThread* jthread = JavaThread::current();
56 if (jthread->has_last_Java_frame()) {
57 vframeStream vfst(jthread);
58 // skip over any frames belonging to java.lang.Class
59 while (!vfst.at_end() &&
60 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class()) {
61 vfst.next();
62 }
63 if (!vfst.at_end()) {
64 // this frame is a likely suspect
65 caller = vfst.method()->method_holder();
66 line_number = vfst.method()->line_number_from_bci(vfst.bci());
67 Symbol* s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
68 if (s != NULL) {
69 source_file = s->as_C_string();
70 }
71 }
72 }
73 if (caller != NULL) {
74 const char * from = Klass::cast(caller)->external_name();
75 const char * to = Klass::cast(to_class)->external_name();
76 // print in a single call to reduce interleaving between threads
77 if (source_file != NULL) {
78 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
79 } else {
80 tty->print("RESOLVE %s %s (reflection)\n", from, to);
81 }
82 }
83 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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");
346 if (element_mirror == NULL) {
347 THROW_0(vmSymbols::java_lang_NullPointerException());
348 }
350 int len = dim_array->length();
351 if (len <= 0 || len > MAX_DIM) {
352 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
353 }
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 }
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 }
385 oop Reflection::array_component_type(oop mirror, TRAPS) {
386 if (java_lang_Class::is_primitive(mirror)) {
387 return NULL;
388 }
390 klassOop klass = java_lang_Class::as_klassOop(mirror);
391 if (!Klass::cast(klass)->oop_is_array()) {
392 return NULL;
393 }
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 }
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
420 // Check if field or method is accessible to client. Throw an
421 // IllegalAccessException and return false if not.
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);
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 }
441 // Additional test for protected members: JLS 6.6.2
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 }
453 // Passed all tests
454 return true;
455 }
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 }
476 return can_relax_access_check_for(current_class, new_class, classloader_only);
477 }
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);
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 }
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);
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;
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;
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(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 }
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 }
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 && Klass::cast(current_class)->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
570 return true;
571 }
573 return can_relax_access_check_for(
574 current_class, field_class, classloader_only);
575 }
578 bool Reflection::is_same_class_package(klassOop class1, klassOop class2) {
579 return instanceKlass::cast(class1)->is_same_class_package(class2);
580 }
582 bool Reflection::is_same_package_member(klassOop class1, klassOop class2, TRAPS) {
583 return instanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
584 }
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 InnerClassesIterator iter(outer);
595 constantPoolHandle cp (THREAD, outer->constants());
596 for (; !iter.done(); iter.next()) {
597 int ioff = iter.inner_class_info_index();
598 int ooff = iter.outer_class_info_index();
600 if (inner_is_member && ioff != 0 && ooff != 0) {
601 klassOop o = cp->klass_at(ooff, CHECK);
602 if (o == outer()) {
603 klassOop i = cp->klass_at(ioff, CHECK);
604 if (i == inner()) {
605 return;
606 }
607 }
608 }
609 if (!inner_is_member && ioff != 0 && ooff == 0 &&
610 cp->klass_name_at_matches(inner, ioff)) {
611 klassOop i = cp->klass_at(ioff, CHECK);
612 if (i == inner()) {
613 return;
614 }
615 }
616 }
618 // 'inner' not declared as an inner klass in outer
619 ResourceMark rm(THREAD);
620 Exceptions::fthrow(
621 THREAD_AND_LOCATION,
622 vmSymbols::java_lang_IncompatibleClassChangeError(),
623 "%s and %s disagree on InnerClasses attribute",
624 outer->external_name(),
625 inner->external_name()
626 );
627 }
629 // Utility method converting a single SignatureStream element into java.lang.Class instance
631 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
632 switch (ss->type()) {
633 default:
634 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
635 return java_lang_Class::primitive_mirror(ss->type());
636 case T_OBJECT:
637 case T_ARRAY:
638 Symbol* name = ss->as_symbol(CHECK_NULL);
639 oop loader = instanceKlass::cast(method->method_holder())->class_loader();
640 oop protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
641 klassOop k = SystemDictionary::resolve_or_fail(
642 name,
643 Handle(THREAD, loader),
644 Handle(THREAD, protection_domain),
645 true, CHECK_NULL);
646 if (TraceClassResolution) {
647 trace_class_resolution(k);
648 }
649 return k->java_mirror();
650 };
651 }
654 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
655 // Allocate array holding parameter types (java.lang.Class instances)
656 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
657 objArrayHandle mirrors (THREAD, m);
658 int index = 0;
659 // Collect parameter types
660 ResourceMark rm(THREAD);
661 Symbol* signature = method->signature();
662 SignatureStream ss(signature);
663 while (!ss.at_return_type()) {
664 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
665 mirrors->obj_at_put(index++, mirror);
666 ss.next();
667 }
668 assert(index == parameter_count, "invalid parameter count");
669 if (return_type != NULL) {
670 // Collect return type as well
671 assert(ss.at_return_type(), "return type should be present");
672 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
673 }
674 return mirrors;
675 }
677 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
678 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
679 }
682 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
683 // Basic types
684 BasicType type = vmSymbols::signature_type(signature);
685 if (type != T_OBJECT) {
686 return Handle(THREAD, Universe::java_mirror(type));
687 }
689 oop loader = instanceKlass::cast(k())->class_loader();
690 oop protection_domain = Klass::cast(k())->protection_domain();
691 klassOop result = SystemDictionary::resolve_or_fail(signature,
692 Handle(THREAD, loader),
693 Handle(THREAD, protection_domain),
694 true, CHECK_(Handle()));
696 if (TraceClassResolution) {
697 trace_class_resolution(result);
698 }
700 oop nt = Klass::cast(result)->java_mirror();
701 return Handle(THREAD, nt);
702 }
705 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
706 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
707 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
708 assert(!method()->is_initializer() ||
709 (for_constant_pool_access && method()->is_static()) ||
710 (method()->name() == vmSymbols::class_initializer_name()
711 && Klass::cast(method()->method_holder())->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
712 instanceKlassHandle holder (THREAD, method->method_holder());
713 int slot = method->method_idnum();
715 Symbol* signature = method->signature();
716 int parameter_count = ArgumentCount(signature).size();
717 oop return_type_oop = NULL;
718 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
719 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
721 Handle return_type(THREAD, return_type_oop);
723 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
725 if (exception_types.is_null()) return NULL;
727 Symbol* method_name = method->name();
728 Handle name;
729 if (intern_name) {
730 // intern_name is only true with UseNewReflection
731 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
732 name = Handle(THREAD, name_oop);
733 } else {
734 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
735 }
736 if (name == NULL) return NULL;
738 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
740 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
742 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
743 java_lang_reflect_Method::set_slot(mh(), slot);
744 java_lang_reflect_Method::set_name(mh(), name());
745 java_lang_reflect_Method::set_return_type(mh(), return_type());
746 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
747 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
748 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
749 java_lang_reflect_Method::set_override(mh(), false);
750 if (java_lang_reflect_Method::has_signature_field() &&
751 method->generic_signature() != NULL) {
752 Symbol* gs = method->generic_signature();
753 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
754 java_lang_reflect_Method::set_signature(mh(), sig());
755 }
756 if (java_lang_reflect_Method::has_annotations_field()) {
757 java_lang_reflect_Method::set_annotations(mh(), method->annotations());
758 }
759 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
760 java_lang_reflect_Method::set_parameter_annotations(mh(), method->parameter_annotations());
761 }
762 if (java_lang_reflect_Method::has_annotation_default_field()) {
763 java_lang_reflect_Method::set_annotation_default(mh(), method->annotation_default());
764 }
765 return mh();
766 }
769 oop Reflection::new_constructor(methodHandle method, TRAPS) {
770 assert(method()->is_initializer(), "should call new_method instead");
772 instanceKlassHandle holder (THREAD, method->method_holder());
773 int slot = method->method_idnum();
775 Symbol* signature = method->signature();
776 int parameter_count = ArgumentCount(signature).size();
777 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
778 if (parameter_types.is_null()) return NULL;
780 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
781 if (exception_types.is_null()) return NULL;
783 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
785 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
787 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
788 java_lang_reflect_Constructor::set_slot(ch(), slot);
789 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
790 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
791 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
792 java_lang_reflect_Constructor::set_override(ch(), false);
793 if (java_lang_reflect_Constructor::has_signature_field() &&
794 method->generic_signature() != NULL) {
795 Symbol* gs = method->generic_signature();
796 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
797 java_lang_reflect_Constructor::set_signature(ch(), sig());
798 }
799 if (java_lang_reflect_Constructor::has_annotations_field()) {
800 java_lang_reflect_Constructor::set_annotations(ch(), method->annotations());
801 }
802 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
803 java_lang_reflect_Constructor::set_parameter_annotations(ch(), method->parameter_annotations());
804 }
805 return ch();
806 }
809 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
810 Symbol* field_name = fd->name();
811 Handle name;
812 if (intern_name) {
813 // intern_name is only true with UseNewReflection
814 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
815 name = Handle(THREAD, name_oop);
816 } else {
817 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
818 }
819 Symbol* signature = fd->signature();
820 KlassHandle holder (THREAD, fd->field_holder());
821 Handle type = new_type(signature, holder, CHECK_NULL);
822 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
824 java_lang_reflect_Field::set_clazz(rh(), Klass::cast(fd->field_holder())->java_mirror());
825 java_lang_reflect_Field::set_slot(rh(), fd->index());
826 java_lang_reflect_Field::set_name(rh(), name());
827 java_lang_reflect_Field::set_type(rh(), type());
828 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
829 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
830 java_lang_reflect_Field::set_override(rh(), false);
831 if (java_lang_reflect_Field::has_signature_field() &&
832 fd->generic_signature() != NULL) {
833 Symbol* gs = fd->generic_signature();
834 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
835 java_lang_reflect_Field::set_signature(rh(), sig());
836 }
837 if (java_lang_reflect_Field::has_annotations_field()) {
838 java_lang_reflect_Field::set_annotations(rh(), fd->annotations());
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 != methodOopDesc::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()->klass_part();
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 methodOopDesc::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 methodOopDesc::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 methodOopDesc::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 klassOop k = java_lang_Class::as_klassOop(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_klassOop(mirror));
1089 methodOop 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_klassOop(mirror));
1106 methodOop 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 }
