Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/reflection.cpp@248ff38d2950
src/share/vm/runtime/reflection.cpp
Fri, 28 Mar 2014 10:13:37 -0700
- author
- vlivanov
- date
- Fri, 28 Mar 2014 10:13:37 -0700
- changeset 6528
- 248ff38d2950
- parent 6161
- 9a60f4ac6a37
- child 6824
- 2373a1f4987c
- permissions
- -rw-r--r--
8035828: Turn on @Stable support in VM
Reviewed-by: jrose, twisti
1 /*
2 * Copyright (c) 1997, 2013, 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 static void trace_class_resolution(Klass* to_class) {
48 ResourceMark rm;
49 int line_number = -1;
50 const char * source_file = NULL;
51 Klass* caller = NULL;
52 JavaThread* jthread = JavaThread::current();
53 if (jthread->has_last_Java_frame()) {
54 vframeStream vfst(jthread);
55 // skip over any frames belonging to java.lang.Class
56 while (!vfst.at_end() &&
57 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
58 vfst.next();
59 }
60 if (!vfst.at_end()) {
61 // this frame is a likely suspect
62 caller = vfst.method()->method_holder();
63 line_number = vfst.method()->line_number_from_bci(vfst.bci());
64 Symbol* s = vfst.method()->method_holder()->source_file_name();
65 if (s != NULL) {
66 source_file = s->as_C_string();
67 }
68 }
69 }
70 if (caller != NULL) {
71 const char * from = caller->external_name();
72 const char * to = to_class->external_name();
73 // print in a single call to reduce interleaving between threads
74 if (source_file != NULL) {
75 tty->print("RESOLVE %s %s %s:%d (reflection)\n", from, to, source_file, line_number);
76 } else {
77 tty->print("RESOLVE %s %s (reflection)\n", from, to);
78 }
79 }
80 }
83 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
84 if (type == T_VOID) {
85 return NULL;
86 }
87 if (type == T_OBJECT || type == T_ARRAY) {
88 // regular objects are not boxed
89 return (oop) value->l;
90 }
91 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
92 if (result == NULL) {
93 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
94 }
95 return result;
96 }
99 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
100 if (box == NULL) {
101 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
102 }
103 return java_lang_boxing_object::get_value(box, value);
104 }
106 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
107 // Note: box is really the unboxed oop. It might even be a Short, etc.!
108 value->l = (jobject) box;
109 return T_OBJECT;
110 }
113 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
114 assert(wide_type != current_type, "widen should not be called with identical types");
115 switch (wide_type) {
116 case T_BOOLEAN:
117 case T_BYTE:
118 case T_CHAR:
119 break; // fail
120 case T_SHORT:
121 switch (current_type) {
122 case T_BYTE:
123 value->s = (jshort) value->b;
124 return;
125 }
126 break; // fail
127 case T_INT:
128 switch (current_type) {
129 case T_BYTE:
130 value->i = (jint) value->b;
131 return;
132 case T_CHAR:
133 value->i = (jint) value->c;
134 return;
135 case T_SHORT:
136 value->i = (jint) value->s;
137 return;
138 }
139 break; // fail
140 case T_LONG:
141 switch (current_type) {
142 case T_BYTE:
143 value->j = (jlong) value->b;
144 return;
145 case T_CHAR:
146 value->j = (jlong) value->c;
147 return;
148 case T_SHORT:
149 value->j = (jlong) value->s;
150 return;
151 case T_INT:
152 value->j = (jlong) value->i;
153 return;
154 }
155 break; // fail
156 case T_FLOAT:
157 switch (current_type) {
158 case T_BYTE:
159 value->f = (jfloat) value->b;
160 return;
161 case T_CHAR:
162 value->f = (jfloat) value->c;
163 return;
164 case T_SHORT:
165 value->f = (jfloat) value->s;
166 return;
167 case T_INT:
168 value->f = (jfloat) value->i;
169 return;
170 case T_LONG:
171 value->f = (jfloat) value->j;
172 return;
173 }
174 break; // fail
175 case T_DOUBLE:
176 switch (current_type) {
177 case T_BYTE:
178 value->d = (jdouble) value->b;
179 return;
180 case T_CHAR:
181 value->d = (jdouble) value->c;
182 return;
183 case T_SHORT:
184 value->d = (jdouble) value->s;
185 return;
186 case T_INT:
187 value->d = (jdouble) value->i;
188 return;
189 case T_FLOAT:
190 value->d = (jdouble) value->f;
191 return;
192 case T_LONG:
193 value->d = (jdouble) value->j;
194 return;
195 }
196 break; // fail
197 default:
198 break; // fail
199 }
200 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
201 }
204 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
205 if (!a->is_within_bounds(index)) {
206 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
207 }
208 if (a->is_objArray()) {
209 value->l = (jobject) objArrayOop(a)->obj_at(index);
210 return T_OBJECT;
211 } else {
212 assert(a->is_typeArray(), "just checking");
213 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
214 switch (type) {
215 case T_BOOLEAN:
216 value->z = typeArrayOop(a)->bool_at(index);
217 break;
218 case T_CHAR:
219 value->c = typeArrayOop(a)->char_at(index);
220 break;
221 case T_FLOAT:
222 value->f = typeArrayOop(a)->float_at(index);
223 break;
224 case T_DOUBLE:
225 value->d = typeArrayOop(a)->double_at(index);
226 break;
227 case T_BYTE:
228 value->b = typeArrayOop(a)->byte_at(index);
229 break;
230 case T_SHORT:
231 value->s = typeArrayOop(a)->short_at(index);
232 break;
233 case T_INT:
234 value->i = typeArrayOop(a)->int_at(index);
235 break;
236 case T_LONG:
237 value->j = typeArrayOop(a)->long_at(index);
238 break;
239 default:
240 return T_ILLEGAL;
241 }
242 return type;
243 }
244 }
247 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
248 if (!a->is_within_bounds(index)) {
249 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
250 }
251 if (a->is_objArray()) {
252 if (value_type == T_OBJECT) {
253 oop obj = (oop) value->l;
254 if (obj != NULL) {
255 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
256 if (!obj->is_a(element_klass)) {
257 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
258 }
259 }
260 objArrayOop(a)->obj_at_put(index, obj);
261 }
262 } else {
263 assert(a->is_typeArray(), "just checking");
264 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
265 if (array_type != value_type) {
266 // The widen operation can potentially throw an exception, but cannot block,
267 // so typeArrayOop a is safe if the call succeeds.
268 widen(value, value_type, array_type, CHECK);
269 }
270 switch (array_type) {
271 case T_BOOLEAN:
272 typeArrayOop(a)->bool_at_put(index, value->z);
273 break;
274 case T_CHAR:
275 typeArrayOop(a)->char_at_put(index, value->c);
276 break;
277 case T_FLOAT:
278 typeArrayOop(a)->float_at_put(index, value->f);
279 break;
280 case T_DOUBLE:
281 typeArrayOop(a)->double_at_put(index, value->d);
282 break;
283 case T_BYTE:
284 typeArrayOop(a)->byte_at_put(index, value->b);
285 break;
286 case T_SHORT:
287 typeArrayOop(a)->short_at_put(index, value->s);
288 break;
289 case T_INT:
290 typeArrayOop(a)->int_at_put(index, value->i);
291 break;
292 case T_LONG:
293 typeArrayOop(a)->long_at_put(index, value->j);
294 break;
295 default:
296 THROW(vmSymbols::java_lang_IllegalArgumentException());
297 }
298 }
299 }
302 Klass* Reflection::basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
303 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
304 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
305 if (type == T_VOID) {
306 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
307 } else {
308 return Universe::typeArrayKlassObj(type);
309 }
310 }
313 oop Reflection:: basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) {
314 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type();
315 return Universe::java_mirror(type);
316 }
319 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
320 if (element_mirror == NULL) {
321 THROW_0(vmSymbols::java_lang_NullPointerException());
322 }
323 if (length < 0) {
324 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
325 }
326 if (java_lang_Class::is_primitive(element_mirror)) {
327 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
328 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
329 } else {
330 Klass* k = java_lang_Class::as_Klass(element_mirror);
331 if (k->oop_is_array() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
332 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
333 }
334 return oopFactory::new_objArray(k, length, THREAD);
335 }
336 }
339 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
340 assert(dim_array->is_typeArray(), "just checking");
341 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
343 if (element_mirror == NULL) {
344 THROW_0(vmSymbols::java_lang_NullPointerException());
345 }
347 int len = dim_array->length();
348 if (len <= 0 || len > MAX_DIM) {
349 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
350 }
352 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
353 for (int i = 0; i < len; i++) {
354 int d = dim_array->int_at(i);
355 if (d < 0) {
356 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
357 }
358 dimensions[i] = d;
359 }
361 Klass* klass;
362 int dim = len;
363 if (java_lang_Class::is_primitive(element_mirror)) {
364 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
365 } else {
366 klass = java_lang_Class::as_Klass(element_mirror);
367 if (klass->oop_is_array()) {
368 int k_dim = ArrayKlass::cast(klass)->dimension();
369 if (k_dim + len > MAX_DIM) {
370 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
371 }
372 dim += k_dim;
373 }
374 }
375 klass = klass->array_klass(dim, CHECK_NULL);
376 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
377 assert(obj->is_array(), "just checking");
378 return arrayOop(obj);
379 }
382 oop Reflection::array_component_type(oop mirror, TRAPS) {
383 if (java_lang_Class::is_primitive(mirror)) {
384 return NULL;
385 }
387 Klass* klass = java_lang_Class::as_Klass(mirror);
388 if (!klass->oop_is_array()) {
389 return NULL;
390 }
392 oop result = ArrayKlass::cast(klass)->component_mirror();
393 #ifdef ASSERT
394 oop result2 = NULL;
395 if (ArrayKlass::cast(klass)->dimension() == 1) {
396 if (klass->oop_is_typeArray()) {
397 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
398 } else {
399 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror();
400 }
401 } else {
402 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension();
403 assert(lower_dim->oop_is_array(), "just checking");
404 result2 = lower_dim->java_mirror();
405 }
406 assert(result == result2, "results must be consistent");
407 #endif //ASSERT
408 return result;
409 }
412 bool Reflection::reflect_check_access(Klass* field_class, AccessFlags acc, Klass* target_class, bool is_method_invoke, TRAPS) {
413 // field_class : declaring class
414 // acc : declared field access
415 // target_class : for protected
417 // Check if field or method is accessible to client. Throw an
418 // IllegalAccessException and return false if not.
420 // The "client" is the class associated with the nearest real frame
421 // getCallerClass already skips Method.invoke frames, so pass 0 in
422 // that case (same as classic).
423 ResourceMark rm(THREAD);
424 assert(THREAD->is_Java_thread(), "sanity check");
425 Klass* client_class = ((JavaThread *)THREAD)->security_get_caller_class(is_method_invoke ? 0 : 1);
427 if (client_class != field_class) {
428 if (!verify_class_access(client_class, field_class, false)
429 || !verify_field_access(client_class,
430 field_class,
431 field_class,
432 acc,
433 false)) {
434 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
435 }
436 }
438 // Additional test for protected members: JLS 6.6.2
440 if (acc.is_protected()) {
441 if (target_class != client_class) {
442 if (!is_same_class_package(client_class, field_class)) {
443 if (!target_class->is_subclass_of(client_class)) {
444 THROW_(vmSymbols::java_lang_IllegalAccessException(), false);
445 }
446 }
447 }
448 }
450 // Passed all tests
451 return true;
452 }
455 bool Reflection::verify_class_access(Klass* current_class, Klass* new_class, bool classloader_only) {
456 // Verify that current_class can access new_class. If the classloader_only
457 // flag is set, we automatically allow any accesses in which current_class
458 // doesn't have a classloader.
459 if ((current_class == NULL) ||
460 (current_class == new_class) ||
461 (new_class->is_public()) ||
462 is_same_class_package(current_class, new_class)) {
463 return true;
464 }
465 // New (1.4) reflection implementation. Allow all accesses from
466 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
467 if ( JDK_Version::is_gte_jdk14x_version()
468 && UseNewReflection
469 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
470 return true;
471 }
473 return can_relax_access_check_for(current_class, new_class, classloader_only);
474 }
476 static bool under_host_klass(InstanceKlass* ik, Klass* host_klass) {
477 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
478 for (;;) {
479 Klass* hc = (Klass*) ik->host_klass();
480 if (hc == NULL) return false;
481 if (hc == host_klass) return true;
482 ik = InstanceKlass::cast(hc);
484 // There's no way to make a host class loop short of patching memory.
485 // Therefore there cannot be a loop here unles there's another bug.
486 // Still, let's check for it.
487 assert(--inf_loop_check > 0, "no host_klass loop");
488 }
489 }
491 bool Reflection::can_relax_access_check_for(
492 Klass* accessor, Klass* accessee, bool classloader_only) {
493 InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
494 InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
496 // If either is on the other's host_klass chain, access is OK,
497 // because one is inside the other.
498 if (under_host_klass(accessor_ik, accessee) ||
499 under_host_klass(accessee_ik, accessor))
500 return true;
502 if ((RelaxAccessControlCheck &&
503 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
504 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) ||
505 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION &&
506 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_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 Klass* host_class = current_class;
541 while (host_class->oop_is_instance() &&
542 InstanceKlass::cast(host_class)->is_anonymous()) {
543 Klass* next_host_class = InstanceKlass::cast(host_class)->host_klass();
544 if (next_host_class == NULL) break;
545 host_class = next_host_class;
546 }
547 if (host_class == field_class) {
548 return true;
549 }
551 if (access.is_protected()) {
552 if (!protected_restriction) {
553 // See if current_class (or outermost host class) is a subclass of field_class
554 if (host_class->is_subclass_of(field_class)) {
555 if (access.is_static() || // static fields are ok, see 6622385
556 current_class == resolved_class ||
557 field_class == resolved_class ||
558 host_class->is_subclass_of(resolved_class) ||
559 resolved_class->is_subclass_of(host_class)) {
560 return true;
561 }
562 }
563 }
564 }
566 if (!access.is_private() && is_same_class_package(current_class, field_class)) {
567 return true;
568 }
570 // New (1.4) reflection implementation. Allow all accesses from
571 // sun/reflect/MagicAccessorImpl subclasses to succeed trivially.
572 if ( JDK_Version::is_gte_jdk14x_version()
573 && UseNewReflection
574 && current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
575 return true;
576 }
578 return can_relax_access_check_for(
579 current_class, field_class, classloader_only);
580 }
583 bool Reflection::is_same_class_package(Klass* class1, Klass* class2) {
584 return InstanceKlass::cast(class1)->is_same_class_package(class2);
585 }
587 bool Reflection::is_same_package_member(Klass* class1, Klass* class2, TRAPS) {
588 return InstanceKlass::cast(class1)->is_same_package_member(class2, THREAD);
589 }
592 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
593 // throw an incompatible class change exception
594 // If inner_is_member, require the inner to be a member of the outer.
595 // If !inner_is_member, require the inner to be anonymous (a non-member).
596 // Caller is responsible for figuring out in advance which case must be true.
597 void Reflection::check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner,
598 bool inner_is_member, TRAPS) {
599 InnerClassesIterator iter(outer);
600 constantPoolHandle cp (THREAD, outer->constants());
601 for (; !iter.done(); iter.next()) {
602 int ioff = iter.inner_class_info_index();
603 int ooff = iter.outer_class_info_index();
605 if (inner_is_member && ioff != 0 && ooff != 0) {
606 Klass* o = cp->klass_at(ooff, CHECK);
607 if (o == outer()) {
608 Klass* i = cp->klass_at(ioff, CHECK);
609 if (i == inner()) {
610 return;
611 }
612 }
613 }
614 if (!inner_is_member && ioff != 0 && ooff == 0 &&
615 cp->klass_name_at_matches(inner, ioff)) {
616 Klass* i = cp->klass_at(ioff, CHECK);
617 if (i == inner()) {
618 return;
619 }
620 }
621 }
623 // 'inner' not declared as an inner klass in outer
624 ResourceMark rm(THREAD);
625 Exceptions::fthrow(
626 THREAD_AND_LOCATION,
627 vmSymbols::java_lang_IncompatibleClassChangeError(),
628 "%s and %s disagree on InnerClasses attribute",
629 outer->external_name(),
630 inner->external_name()
631 );
632 }
634 // Utility method converting a single SignatureStream element into java.lang.Class instance
636 oop get_mirror_from_signature(methodHandle method, SignatureStream* ss, TRAPS) {
637 switch (ss->type()) {
638 default:
639 assert(ss->type() != T_VOID || ss->at_return_type(), "T_VOID should only appear as return type");
640 return java_lang_Class::primitive_mirror(ss->type());
641 case T_OBJECT:
642 case T_ARRAY:
643 Symbol* name = ss->as_symbol(CHECK_NULL);
644 oop loader = method->method_holder()->class_loader();
645 oop protection_domain = method->method_holder()->protection_domain();
646 Klass* k = SystemDictionary::resolve_or_fail(
647 name,
648 Handle(THREAD, loader),
649 Handle(THREAD, protection_domain),
650 true, CHECK_NULL);
651 if (TraceClassResolution) {
652 trace_class_resolution(k);
653 }
654 return k->java_mirror();
655 };
656 }
659 objArrayHandle Reflection::get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS) {
660 // Allocate array holding parameter types (java.lang.Class instances)
661 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
662 objArrayHandle mirrors (THREAD, m);
663 int index = 0;
664 // Collect parameter types
665 ResourceMark rm(THREAD);
666 Symbol* signature = method->signature();
667 SignatureStream ss(signature);
668 while (!ss.at_return_type()) {
669 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
670 mirrors->obj_at_put(index++, mirror);
671 ss.next();
672 }
673 assert(index == parameter_count, "invalid parameter count");
674 if (return_type != NULL) {
675 // Collect return type as well
676 assert(ss.at_return_type(), "return type should be present");
677 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
678 }
679 return mirrors;
680 }
682 objArrayHandle Reflection::get_exception_types(methodHandle method, TRAPS) {
683 return method->resolved_checked_exceptions(CHECK_(objArrayHandle()));
684 }
687 Handle Reflection::new_type(Symbol* signature, KlassHandle k, TRAPS) {
688 // Basic types
689 BasicType type = vmSymbols::signature_type(signature);
690 if (type != T_OBJECT) {
691 return Handle(THREAD, Universe::java_mirror(type));
692 }
694 oop loader = InstanceKlass::cast(k())->class_loader();
695 oop protection_domain = k()->protection_domain();
696 Klass* result = SystemDictionary::resolve_or_fail(signature,
697 Handle(THREAD, loader),
698 Handle(THREAD, protection_domain),
699 true, CHECK_(Handle()));
701 if (TraceClassResolution) {
702 trace_class_resolution(result);
703 }
705 oop nt = result->java_mirror();
706 return Handle(THREAD, nt);
707 }
710 oop Reflection::new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS) {
711 // In jdk1.2.x, getMethods on an interface erroneously includes <clinit>, thus the complicated assert.
712 // Also allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
713 assert(!method()->is_initializer() ||
714 (for_constant_pool_access && method()->is_static()) ||
715 (method()->name() == vmSymbols::class_initializer_name()
716 && method()->method_holder()->is_interface() && JDK_Version::is_jdk12x_version()), "should call new_constructor instead");
717 instanceKlassHandle holder (THREAD, method->method_holder());
718 int slot = method->method_idnum();
720 Symbol* signature = method->signature();
721 int parameter_count = ArgumentCount(signature).size();
722 oop return_type_oop = NULL;
723 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
724 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
726 Handle return_type(THREAD, return_type_oop);
728 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
730 if (exception_types.is_null()) return NULL;
732 Symbol* method_name = method->name();
733 Handle name;
734 if (intern_name) {
735 // intern_name is only true with UseNewReflection
736 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
737 name = Handle(THREAD, name_oop);
738 } else {
739 name = java_lang_String::create_from_symbol(method_name, CHECK_NULL);
740 }
741 if (name == NULL) return NULL;
743 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
745 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
747 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
748 java_lang_reflect_Method::set_slot(mh(), slot);
749 java_lang_reflect_Method::set_name(mh(), name());
750 java_lang_reflect_Method::set_return_type(mh(), return_type());
751 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
752 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
753 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
754 java_lang_reflect_Method::set_override(mh(), false);
755 if (java_lang_reflect_Method::has_signature_field() &&
756 method->generic_signature() != NULL) {
757 Symbol* gs = method->generic_signature();
758 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
759 java_lang_reflect_Method::set_signature(mh(), sig());
760 }
761 if (java_lang_reflect_Method::has_annotations_field()) {
762 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
763 java_lang_reflect_Method::set_annotations(mh(), an_oop);
764 }
765 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
766 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
767 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
768 }
769 if (java_lang_reflect_Method::has_annotation_default_field()) {
770 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
771 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
772 }
773 if (java_lang_reflect_Method::has_type_annotations_field()) {
774 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
775 java_lang_reflect_Method::set_type_annotations(mh(), an_oop);
776 }
777 return mh();
778 }
781 oop Reflection::new_constructor(methodHandle method, TRAPS) {
782 assert(method()->is_initializer(), "should call new_method instead");
784 instanceKlassHandle holder (THREAD, method->method_holder());
785 int slot = method->method_idnum();
787 Symbol* signature = method->signature();
788 int parameter_count = ArgumentCount(signature).size();
789 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
790 if (parameter_types.is_null()) return NULL;
792 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
793 if (exception_types.is_null()) return NULL;
795 int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
797 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
799 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
800 java_lang_reflect_Constructor::set_slot(ch(), slot);
801 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
802 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
803 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
804 java_lang_reflect_Constructor::set_override(ch(), false);
805 if (java_lang_reflect_Constructor::has_signature_field() &&
806 method->generic_signature() != NULL) {
807 Symbol* gs = method->generic_signature();
808 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
809 java_lang_reflect_Constructor::set_signature(ch(), sig());
810 }
811 if (java_lang_reflect_Constructor::has_annotations_field()) {
812 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
813 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
814 }
815 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
816 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
817 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
818 }
819 if (java_lang_reflect_Constructor::has_type_annotations_field()) {
820 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
821 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop);
822 }
823 return ch();
824 }
827 oop Reflection::new_field(fieldDescriptor* fd, bool intern_name, TRAPS) {
828 Symbol* field_name = fd->name();
829 Handle name;
830 if (intern_name) {
831 // intern_name is only true with UseNewReflection
832 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
833 name = Handle(THREAD, name_oop);
834 } else {
835 name = java_lang_String::create_from_symbol(field_name, CHECK_NULL);
836 }
837 Symbol* signature = fd->signature();
838 instanceKlassHandle holder (THREAD, fd->field_holder());
839 Handle type = new_type(signature, holder, CHECK_NULL);
840 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
842 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
843 java_lang_reflect_Field::set_slot(rh(), fd->index());
844 java_lang_reflect_Field::set_name(rh(), name());
845 java_lang_reflect_Field::set_type(rh(), type());
846 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
847 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
848 java_lang_reflect_Field::set_override(rh(), false);
849 if (java_lang_reflect_Field::has_signature_field() &&
850 fd->has_generic_signature()) {
851 Symbol* gs = fd->generic_signature();
852 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
853 java_lang_reflect_Field::set_signature(rh(), sig());
854 }
855 if (java_lang_reflect_Field::has_annotations_field()) {
856 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
857 java_lang_reflect_Field::set_annotations(rh(), an_oop);
858 }
859 if (java_lang_reflect_Field::has_type_annotations_field()) {
860 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL);
861 java_lang_reflect_Field::set_type_annotations(rh(), an_oop);
862 }
863 return rh();
864 }
866 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
867 int flags, TRAPS) {
868 Handle name;
870 // A null symbol here translates to the empty string
871 if(NULL != sym) {
872 name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
873 } else {
874 name = java_lang_String::create_from_str("", CHECK_NULL);
875 }
877 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
878 java_lang_reflect_Parameter::set_name(rh(), name());
879 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
880 java_lang_reflect_Parameter::set_executable(rh(), method());
881 java_lang_reflect_Parameter::set_index(rh(), index);
882 return rh();
883 }
886 methodHandle Reflection::resolve_interface_call(instanceKlassHandle klass, methodHandle method,
887 KlassHandle recv_klass, Handle receiver, TRAPS) {
888 assert(!method.is_null() , "method should not be null");
890 CallInfo info;
891 Symbol* signature = method->signature();
892 Symbol* name = method->name();
893 LinkResolver::resolve_interface_call(info, receiver, recv_klass, klass,
894 name, signature,
895 KlassHandle(), false, true,
896 CHECK_(methodHandle()));
897 return info.selected_method();
898 }
901 oop Reflection::invoke(instanceKlassHandle klass, methodHandle reflected_method,
902 Handle receiver, bool override, objArrayHandle ptypes,
903 BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS) {
904 ResourceMark rm(THREAD);
906 methodHandle method; // actual method to invoke
907 KlassHandle target_klass; // target klass, receiver's klass for non-static
909 // Ensure klass is initialized
910 klass->initialize(CHECK_NULL);
912 bool is_static = reflected_method->is_static();
913 if (is_static) {
914 // ignore receiver argument
915 method = reflected_method;
916 target_klass = klass;
917 } else {
918 // check for null receiver
919 if (receiver.is_null()) {
920 THROW_0(vmSymbols::java_lang_NullPointerException());
921 }
922 // Check class of receiver against class declaring method
923 if (!receiver->is_a(klass())) {
924 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
925 }
926 // target klass is receiver's klass
927 target_klass = KlassHandle(THREAD, receiver->klass());
928 // no need to resolve if method is private or <init>
929 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
930 method = reflected_method;
931 } else {
932 // resolve based on the receiver
933 if (reflected_method->method_holder()->is_interface()) {
934 // resolve interface call
935 if (ReflectionWrapResolutionErrors) {
936 // new default: 6531596
937 // Match resolution errors with those thrown due to reflection inlining
938 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
939 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
940 if (HAS_PENDING_EXCEPTION) {
941 // Method resolution threw an exception; wrap it in an InvocationTargetException
942 oop resolution_exception = PENDING_EXCEPTION;
943 CLEAR_PENDING_EXCEPTION;
944 JavaCallArguments args(Handle(THREAD, resolution_exception));
945 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
946 vmSymbols::throwable_void_signature(),
947 &args);
948 }
949 } else {
950 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, CHECK_(NULL));
951 }
952 } else {
953 // if the method can be overridden, we resolve using the vtable index.
954 assert(!reflected_method->has_itable_index(), "");
955 int index = reflected_method->vtable_index();
956 method = reflected_method;
957 if (index != Method::nonvirtual_vtable_index) {
958 // target_klass might be an arrayKlassOop but all vtables start at
959 // the same place. The cast is to avoid virtual call and assertion.
960 InstanceKlass* inst = (InstanceKlass*)target_klass();
961 method = methodHandle(THREAD, inst->method_at_vtable(index));
962 }
963 if (!method.is_null()) {
964 // Check for abstract methods as well
965 if (method->is_abstract()) {
966 // new default: 6531596
967 if (ReflectionWrapResolutionErrors) {
968 ResourceMark rm(THREAD);
969 Handle h_origexception = Exceptions::new_exception(THREAD,
970 vmSymbols::java_lang_AbstractMethodError(),
971 Method::name_and_sig_as_C_string(target_klass(),
972 method->name(),
973 method->signature()));
974 JavaCallArguments args(h_origexception);
975 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
976 vmSymbols::throwable_void_signature(),
977 &args);
978 } else {
979 ResourceMark rm(THREAD);
980 THROW_MSG_0(vmSymbols::java_lang_AbstractMethodError(),
981 Method::name_and_sig_as_C_string(target_klass(),
982 method->name(),
983 method->signature()));
984 }
985 }
986 }
987 }
988 }
989 }
991 // I believe this is a ShouldNotGetHere case which requires
992 // an internal vtable bug. If you ever get this please let Karen know.
993 if (method.is_null()) {
994 ResourceMark rm(THREAD);
995 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
996 Method::name_and_sig_as_C_string(klass(),
997 reflected_method->name(),
998 reflected_method->signature()));
999 }
1001 // In the JDK 1.4 reflection implementation, the security check is
1002 // done at the Java level
1003 if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
1005 // Access checking (unless overridden by Method)
1006 if (!override) {
1007 if (!(klass->is_public() && reflected_method->is_public())) {
1008 bool access = Reflection::reflect_check_access(klass(), reflected_method->access_flags(), target_klass(), is_method_invoke, CHECK_NULL);
1009 if (!access) {
1010 return NULL; // exception
1011 }
1012 }
1013 }
1015 } // !(Universe::is_gte_jdk14x_version() && UseNewReflection)
1017 assert(ptypes->is_objArray(), "just checking");
1018 int args_len = args.is_null() ? 0 : args->length();
1019 // Check number of arguments
1020 if (ptypes->length() != args_len) {
1021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "wrong number of arguments");
1022 }
1024 // Create object to contain parameters for the JavaCall
1025 JavaCallArguments java_args(method->size_of_parameters());
1027 if (!is_static) {
1028 java_args.push_oop(receiver);
1029 }
1031 for (int i = 0; i < args_len; i++) {
1032 oop type_mirror = ptypes->obj_at(i);
1033 oop arg = args->obj_at(i);
1034 if (java_lang_Class::is_primitive(type_mirror)) {
1035 jvalue value;
1036 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1037 BasicType atype = unbox_for_primitive(arg, &value, CHECK_NULL);
1038 if (ptype != atype) {
1039 widen(&value, atype, ptype, CHECK_NULL);
1040 }
1041 switch (ptype) {
1042 case T_BOOLEAN: java_args.push_int(value.z); break;
1043 case T_CHAR: java_args.push_int(value.c); break;
1044 case T_BYTE: java_args.push_int(value.b); break;
1045 case T_SHORT: java_args.push_int(value.s); break;
1046 case T_INT: java_args.push_int(value.i); break;
1047 case T_LONG: java_args.push_long(value.j); break;
1048 case T_FLOAT: java_args.push_float(value.f); break;
1049 case T_DOUBLE: java_args.push_double(value.d); break;
1050 default:
1051 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1052 }
1053 } else {
1054 if (arg != NULL) {
1055 Klass* k = java_lang_Class::as_Klass(type_mirror);
1056 if (!arg->is_a(k)) {
1057 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1058 }
1059 }
1060 Handle arg_handle(THREAD, arg); // Create handle for argument
1061 java_args.push_oop(arg_handle); // Push handle
1062 }
1063 }
1065 assert(java_args.size_of_parameters() == method->size_of_parameters(), "just checking");
1067 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1068 // oop (i.e., NOT as an handle)
1069 JavaValue result(rtype);
1070 JavaCalls::call(&result, method, &java_args, THREAD);
1072 if (HAS_PENDING_EXCEPTION) {
1073 // Method threw an exception; wrap it in an InvocationTargetException
1074 oop target_exception = PENDING_EXCEPTION;
1075 CLEAR_PENDING_EXCEPTION;
1076 JavaCallArguments args(Handle(THREAD, target_exception));
1077 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1078 vmSymbols::throwable_void_signature(),
1079 &args);
1080 } else {
1081 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT)
1082 narrow((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1083 return box((jvalue*) result.get_value_addr(), rtype, CHECK_NULL);
1084 }
1085 }
1088 void Reflection::narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1089 switch (narrow_type) {
1090 case T_BOOLEAN:
1091 value->z = (jboolean) value->i;
1092 return;
1093 case T_BYTE:
1094 value->b = (jbyte) value->i;
1095 return;
1096 case T_CHAR:
1097 value->c = (jchar) value->i;
1098 return;
1099 case T_SHORT:
1100 value->s = (jshort) value->i;
1101 return;
1102 default:
1103 break; // fail
1104 }
1105 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1106 }
1109 BasicType Reflection::basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1110 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
1111 return java_lang_Class::primitive_type(basic_type_mirror);
1112 }
1114 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1115 // of java.lang.reflect.Constructor
1117 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1118 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1119 int slot = java_lang_reflect_Method::slot(method_mirror);
1120 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1121 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1123 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1124 BasicType rtype;
1125 if (java_lang_Class::is_primitive(return_type_mirror)) {
1126 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1127 } else {
1128 rtype = T_OBJECT;
1129 }
1131 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1132 Method* m = klass->method_with_idnum(slot);
1133 if (m == NULL) {
1134 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1135 }
1136 methodHandle method(THREAD, m);
1138 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1139 }
1142 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1143 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1144 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1145 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1146 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1148 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(mirror));
1149 Method* m = klass->method_with_idnum(slot);
1150 if (m == NULL) {
1151 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1152 }
1153 methodHandle method(THREAD, m);
1154 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1156 // Make sure klass gets initialize
1157 klass->initialize(CHECK_NULL);
1159 // Create new instance (the receiver)
1160 klass->check_valid_for_instantiation(false, CHECK_NULL);
1161 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1163 // Ignore result from call and return receiver
1164 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1165 return receiver();
1166 }
