1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/moduleEntry.hpp"
29 #include "classfile/packageEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/verifier.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "logging/log.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/typeArrayOop.inline.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/fieldDescriptor.inline.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/reflection.hpp"
50 #include "runtime/reflectionUtils.hpp"
51 #include "runtime/signature.hpp"
52 #include "runtime/vframe.inline.hpp"
53
54 static void trace_class_resolution(const Klass* to_class) {
55 ResourceMark rm;
56 int line_number = -1;
57 const char * source_file = NULL;
58 Klass* caller = NULL;
59 JavaThread* jthread = JavaThread::current();
60 if (jthread->has_last_Java_frame()) {
61 vframeStream vfst(jthread);
62 // skip over any frames belonging to java.lang.Class
63 while (!vfst.at_end() &&
64 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
65 vfst.next();
66 }
67 if (!vfst.at_end()) {
68 // this frame is a likely suspect
69 caller = vfst.method()->method_holder();
70 line_number = vfst.method()->line_number_from_bci(vfst.bci());
71 Symbol* s = vfst.method()->method_holder()->source_file_name();
72 if (s != NULL) {
73 source_file = s->as_C_string();
74 }
75 }
76 }
77 if (caller != NULL) {
78 const char * from = caller->external_name();
79 const char * to = to_class->external_name();
80 // print in a single call to reduce interleaving between threads
81 if (source_file != NULL) {
82 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
83 } else {
84 log_debug(class, resolve)("%s %s (reflection)", from, to);
85 }
86 }
87 }
88
89
90 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
91 if (type == T_VOID) {
92 return NULL;
93 }
94 if (type == T_OBJECT || type == T_ARRAY) {
95 // regular objects are not boxed
96 return (oop) value->l;
97 }
98 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
99 if (result == NULL) {
100 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
101 }
102 return result;
103 }
104
105
106 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
107 if (box == NULL) {
108 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
109 }
110 return java_lang_boxing_object::get_value(box, value);
111 }
112
113 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
114 // Note: box is really the unboxed oop. It might even be a Short, etc.!
115 value->l = (jobject) box;
116 return T_OBJECT;
117 }
118
119
120 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
121 assert(wide_type != current_type, "widen should not be called with identical types");
122 switch (wide_type) {
123 case T_BOOLEAN:
124 case T_BYTE:
125 case T_CHAR:
126 break; // fail
127 case T_SHORT:
128 switch (current_type) {
129 case T_BYTE:
130 value->s = (jshort) value->b;
131 return;
132 default:
133 break;
134 }
135 break; // fail
136 case T_INT:
137 switch (current_type) {
138 case T_BYTE:
139 value->i = (jint) value->b;
140 return;
141 case T_CHAR:
142 value->i = (jint) value->c;
143 return;
144 case T_SHORT:
145 value->i = (jint) value->s;
146 return;
147 default:
148 break;
149 }
150 break; // fail
151 case T_LONG:
152 switch (current_type) {
153 case T_BYTE:
154 value->j = (jlong) value->b;
155 return;
156 case T_CHAR:
157 value->j = (jlong) value->c;
158 return;
159 case T_SHORT:
160 value->j = (jlong) value->s;
161 return;
162 case T_INT:
163 value->j = (jlong) value->i;
164 return;
165 default:
166 break;
167 }
168 break; // fail
169 case T_FLOAT:
170 switch (current_type) {
171 case T_BYTE:
172 value->f = (jfloat) value->b;
173 return;
174 case T_CHAR:
175 value->f = (jfloat) value->c;
176 return;
177 case T_SHORT:
178 value->f = (jfloat) value->s;
179 return;
180 case T_INT:
181 value->f = (jfloat) value->i;
182 return;
183 case T_LONG:
184 value->f = (jfloat) value->j;
185 return;
186 default:
187 break;
188 }
189 break; // fail
190 case T_DOUBLE:
191 switch (current_type) {
192 case T_BYTE:
193 value->d = (jdouble) value->b;
194 return;
195 case T_CHAR:
196 value->d = (jdouble) value->c;
197 return;
198 case T_SHORT:
199 value->d = (jdouble) value->s;
200 return;
201 case T_INT:
202 value->d = (jdouble) value->i;
203 return;
204 case T_FLOAT:
205 value->d = (jdouble) value->f;
206 return;
207 case T_LONG:
208 value->d = (jdouble) value->j;
209 return;
210 default:
211 break;
212 }
213 break; // fail
214 default:
215 break; // fail
216 }
217 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
218 }
219
220
221 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
222 if (!a->is_within_bounds(index)) {
223 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
224 }
225 if (a->is_objArray()) {
226 value->l = (jobject) objArrayOop(a)->obj_at(index);
227 return T_OBJECT;
228 } else {
229 assert(a->is_typeArray(), "just checking");
230 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
231 switch (type) {
232 case T_BOOLEAN:
233 value->z = typeArrayOop(a)->bool_at(index);
234 break;
235 case T_CHAR:
236 value->c = typeArrayOop(a)->char_at(index);
237 break;
238 case T_FLOAT:
239 value->f = typeArrayOop(a)->float_at(index);
240 break;
241 case T_DOUBLE:
242 value->d = typeArrayOop(a)->double_at(index);
243 break;
244 case T_BYTE:
245 value->b = typeArrayOop(a)->byte_at(index);
246 break;
247 case T_SHORT:
248 value->s = typeArrayOop(a)->short_at(index);
249 break;
250 case T_INT:
251 value->i = typeArrayOop(a)->int_at(index);
252 break;
253 case T_LONG:
254 value->j = typeArrayOop(a)->long_at(index);
255 break;
256 default:
257 return T_ILLEGAL;
258 }
259 return type;
260 }
261 }
262
263
264 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
265 if (!a->is_within_bounds(index)) {
266 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
267 }
268 if (a->is_objArray()) {
269 if (value_type == T_OBJECT) {
270 oop obj = (oop) value->l;
271 if (obj != NULL) {
272 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
273 if (!obj->is_a(element_klass)) {
274 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
275 }
276 }
277 objArrayOop(a)->obj_at_put(index, obj);
278 }
279 } else {
280 assert(a->is_typeArray(), "just checking");
281 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
282 if (array_type != value_type) {
283 // The widen operation can potentially throw an exception, but cannot block,
284 // so typeArrayOop a is safe if the call succeeds.
285 widen(value, value_type, array_type, CHECK);
286 }
287 switch (array_type) {
288 case T_BOOLEAN:
289 typeArrayOop(a)->bool_at_put(index, value->z);
290 break;
291 case T_CHAR:
292 typeArrayOop(a)->char_at_put(index, value->c);
293 break;
294 case T_FLOAT:
295 typeArrayOop(a)->float_at_put(index, value->f);
296 break;
297 case T_DOUBLE:
298 typeArrayOop(a)->double_at_put(index, value->d);
299 break;
300 case T_BYTE:
301 typeArrayOop(a)->byte_at_put(index, value->b);
302 break;
303 case T_SHORT:
304 typeArrayOop(a)->short_at_put(index, value->s);
305 break;
306 case T_INT:
307 typeArrayOop(a)->int_at_put(index, value->i);
308 break;
309 case T_LONG:
310 typeArrayOop(a)->long_at_put(index, value->j);
311 break;
312 default:
313 THROW(vmSymbols::java_lang_IllegalArgumentException());
314 }
315 }
316 }
317
318 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
319 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
320 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
321 if (type == T_VOID) {
322 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
323 }
324 else {
325 return Universe::typeArrayKlassObj(type);
326 }
327 }
328
329 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
330 if (element_mirror == NULL) {
331 THROW_0(vmSymbols::java_lang_NullPointerException());
332 }
333 if (length < 0) {
334 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
335 }
336 if (java_lang_Class::is_primitive(element_mirror)) {
337 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
338 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
339 } else {
340 Klass* k = java_lang_Class::as_Klass(element_mirror);
341 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
342 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
343 }
344 return oopFactory::new_objArray(k, length, THREAD);
345 }
346 }
347
348
349 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
350 assert(dim_array->is_typeArray(), "just checking");
351 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
352
353 if (element_mirror == NULL) {
354 THROW_0(vmSymbols::java_lang_NullPointerException());
355 }
356
357 int len = dim_array->length();
358 if (len <= 0 || len > MAX_DIM) {
359 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
360 }
361
362 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
363 for (int i = 0; i < len; i++) {
364 int d = dim_array->int_at(i);
365 if (d < 0) {
366 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
367 }
368 dimensions[i] = d;
369 }
370
371 Klass* klass;
372 int dim = len;
373 if (java_lang_Class::is_primitive(element_mirror)) {
374 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
375 } else {
376 klass = java_lang_Class::as_Klass(element_mirror);
377 if (klass->is_array_klass()) {
378 int k_dim = ArrayKlass::cast(klass)->dimension();
379 if (k_dim + len > MAX_DIM) {
380 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
381 }
382 dim += k_dim;
383 }
384 }
385 klass = klass->array_klass(dim, CHECK_NULL);
386 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
387 assert(obj->is_array(), "just checking");
388 return arrayOop(obj);
389 }
390
391
392 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
393 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
394 for (;;) {
395 const InstanceKlass* hc = ik->unsafe_anonymous_host();
396 if (hc == NULL) return false;
397 if (hc == unsafe_anonymous_host) return true;
398 ik = hc;
399
400 // There's no way to make a host class loop short of patching memory.
401 // Therefore there cannot be a loop here unless there's another bug.
402 // Still, let's check for it.
403 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop");
404 }
405 }
406
407 static bool can_relax_access_check_for(const Klass* accessor,
408 const Klass* accessee,
409 bool classloader_only) {
410
411 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
412 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
413
414 // If either is on the other's unsafe_anonymous_host chain, access is OK,
415 // because one is inside the other.
416 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) ||
417 under_unsafe_anonymous_host(accessee_ik, accessor_ik))
418 return true;
419
420 if ((RelaxAccessControlCheck &&
421 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
422 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) ||
423 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION &&
424 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) {
425 return classloader_only &&
426 Verifier::relax_access_for(accessor_ik->class_loader()) &&
427 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
428 accessor_ik->class_loader() == accessee_ik->class_loader();
429 }
430
431 return false;
432 }
433
434 /*
435 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
436
437 Callee T in Callee T in package PT,
438 unnamed module runtime module MT
439 ------------------------------------------------------------------------------------------------
440
441 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
442 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
443 unnamed module: YES
444 Else if (MS can read MT (establish readability) &&
445 ((MT exports PT to MS or to all modules) ||
446 (MT is open))): YES
447
448 ------------------------------------------------------------------------------------------------
449 Caller S in unnamed YES Readability exists because unnamed module
450 module UM "reads" all modules
451 if (MT exports PT to UM or to all modules): YES
452
453 ------------------------------------------------------------------------------------------------
454
455 Note: a loose module is a module that can read all current and future unnamed modules.
456 */
457 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
458 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
459
460 // Verify that current_class can access new_class. If the classloader_only
461 // flag is set, we automatically allow any accesses in which current_class
462 // doesn't have a classloader.
463 if ((current_class == NULL) ||
464 (current_class == new_class) ||
465 is_same_class_package(current_class, new_class)) {
466 return ACCESS_OK;
467 }
468 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
469 // succeed trivially.
470 if (SystemDictionary::reflect_MagicAccessorImpl_klass_is_loaded() &&
471 current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
472 return ACCESS_OK;
473 }
474
475 // module boundaries
476 if (new_class->is_public()) {
477 // Ignore modules for DumpSharedSpaces because we do not have any package
478 // or module information for modules other than java.base.
479 if (DumpSharedSpaces) {
480 return ACCESS_OK;
481 }
482
483 // Find the module entry for current_class, the accessor
484 ModuleEntry* module_from = current_class->module();
485 // Find the module entry for new_class, the accessee
486 ModuleEntry* module_to = new_class->module();
487
488 // both in same (possibly unnamed) module
489 if (module_from == module_to) {
490 return ACCESS_OK;
491 }
492
493 // Acceptable access to a type in an unnamed module. Note that since
494 // unnamed modules can read all unnamed modules, this also handles the
495 // case where module_from is also unnamed but in a different class loader.
496 if (!module_to->is_named() &&
497 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
498 return ACCESS_OK;
499 }
500
501 // Establish readability, check if module_from is allowed to read module_to.
502 if (!module_from->can_read(module_to)) {
503 return MODULE_NOT_READABLE;
504 }
505
506 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
507 if (module_to->is_open()) {
508 return ACCESS_OK;
509 }
510
511 PackageEntry* package_to = new_class->package();
512 assert(package_to != NULL, "can not obtain new_class' package");
513
514 {
515 MutexLocker m1(Module_lock);
516
517 // Once readability is established, if module_to exports T unqualifiedly,
518 // (to all modules), than whether module_from is in the unnamed module
519 // or not does not matter, access is allowed.
520 if (package_to->is_unqual_exported()) {
521 return ACCESS_OK;
522 }
523
524 // Access is allowed if both 1 & 2 hold:
525 // 1. Readability, module_from can read module_to (established above).
526 // 2. Either module_to exports T to module_from qualifiedly.
527 // or
528 // module_to exports T to all unnamed modules and module_from is unnamed.
529 // or
530 // module_to exports T unqualifiedly to all modules (checked above).
531 if (!package_to->is_qexported_to(module_from)) {
532 return TYPE_NOT_EXPORTED;
533 }
534 }
535 return ACCESS_OK;
536 }
537
538 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
539 return ACCESS_OK;
540 }
541 return OTHER_PROBLEM;
542 }
543
544 // Return an error message specific to the specified Klass*'s and result.
545 // This function must be called from within a block containing a ResourceMark.
546 char* Reflection::verify_class_access_msg(const Klass* current_class,
547 const InstanceKlass* new_class,
548 const VerifyClassAccessResults result) {
549 assert(result != ACCESS_OK, "must be failure result");
550 char * msg = NULL;
551 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) {
552 // Find the module entry for current_class, the accessor
553 ModuleEntry* module_from = current_class->module();
554 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
555 const char * current_class_name = current_class->external_name();
556
557 // Find the module entry for new_class, the accessee
558 ModuleEntry* module_to = NULL;
559 module_to = new_class->module();
560 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
561 const char * new_class_name = new_class->external_name();
562
563 if (result == MODULE_NOT_READABLE) {
564 assert(module_from->is_named(), "Unnamed modules can read all modules");
565 if (module_to->is_named()) {
566 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
567 strlen(new_class_name) + 2*strlen(module_to_name);
568 msg = NEW_RESOURCE_ARRAY(char, len);
569 jio_snprintf(msg, len - 1,
570 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
571 current_class_name, module_from_name, new_class_name,
572 module_to_name, module_from_name, module_to_name);
573 } else {
574 oop jlm = module_to->module();
575 assert(jlm != NULL, "Null jlm in module_to ModuleEntry");
576 intptr_t identity_hash = jlm->identity_hash();
577 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
578 strlen(new_class_name) + 2*sizeof(uintx);
579 msg = NEW_RESOURCE_ARRAY(char, len);
580 jio_snprintf(msg, len - 1,
581 "class %s (in module %s) cannot access class %s (in unnamed module @" SIZE_FORMAT_HEX ") because module %s does not read unnamed module @" SIZE_FORMAT_HEX,
582 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
583 module_from_name, uintx(identity_hash));
584 }
585
586 } else if (result == TYPE_NOT_EXPORTED) {
587 assert(new_class->package() != NULL,
588 "Unnamed packages are always exported");
589 const char * package_name =
590 new_class->package()->name()->as_klass_external_name();
591 assert(module_to->is_named(), "Unnamed modules export all packages");
592 if (module_from->is_named()) {
593 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
594 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
595 msg = NEW_RESOURCE_ARRAY(char, len);
596 jio_snprintf(msg, len - 1,
597 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
598 current_class_name, module_from_name, new_class_name,
599 module_to_name, module_to_name, package_name, module_from_name);
600 } else {
601 oop jlm = module_from->module();
602 assert(jlm != NULL, "Null jlm in module_from ModuleEntry");
603 intptr_t identity_hash = jlm->identity_hash();
604 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
605 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
606 msg = NEW_RESOURCE_ARRAY(char, len);
607 jio_snprintf(msg, len - 1,
608 "class %s (in unnamed module @" SIZE_FORMAT_HEX ") cannot access class %s (in module %s) because module %s does not export %s to unnamed module @" SIZE_FORMAT_HEX,
609 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
610 module_to_name, package_name, uintx(identity_hash));
611 }
612 } else {
613 ShouldNotReachHere();
614 }
615 } // result != OTHER_PROBLEM...
616 return msg;
617 }
618
619 bool Reflection::verify_member_access(const Klass* current_class,
620 const Klass* resolved_class,
621 const Klass* member_class,
622 AccessFlags access,
623 bool classloader_only,
624 bool protected_restriction,
625 TRAPS) {
626 // Verify that current_class can access a member of member_class, where that
627 // field's access bits are "access". We assume that we've already verified
628 // that current_class can access member_class.
629 //
630 // If the classloader_only flag is set, we automatically allow any accesses
631 // in which current_class doesn't have a classloader.
632 //
633 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
634 // need this distinction (e.g. if all we have is the runtime type, or during
635 // class file parsing when we only care about the static type); in that case
636 // callers should ensure that resolved_class == member_class.
637 //
638 if ((current_class == NULL) ||
639 (current_class == member_class) ||
640 access.is_public()) {
641 return true;
642 }
643
644 const Klass* host_class = current_class;
645 if (current_class->is_instance_klass() &&
646 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) {
647 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host();
648 assert(host_class != NULL, "Unsafe anonymous class has null host class");
649 assert(!(host_class->is_instance_klass() &&
650 InstanceKlass::cast(host_class)->is_unsafe_anonymous()),
651 "unsafe_anonymous_host should not be unsafe anonymous itself");
652 }
653 if (host_class == member_class) {
654 return true;
655 }
656
657 if (access.is_protected()) {
658 if (!protected_restriction) {
659 // See if current_class (or outermost host class) is a subclass of member_class
660 // An interface may not access protected members of j.l.Object
661 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) {
662 if (access.is_static() || // static fields are ok, see 6622385
663 current_class == resolved_class ||
664 member_class == resolved_class ||
665 host_class->is_subclass_of(resolved_class) ||
666 resolved_class->is_subclass_of(host_class)) {
667 return true;
668 }
669 }
670 }
671 }
672
673 // package access
674 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
675 return true;
676 }
677
678 // private access between different classes needs a nestmate check, but
679 // not for unsafe anonymous classes - so check host_class
680 if (access.is_private() && host_class == current_class) {
681 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
682 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
683 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
684 // Nestmate access checks may require resolution and validation of the nest-host.
685 // It is up to the caller to check for pending exceptions and handle appropriately.
686 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
687 if (access) {
688 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
689 return true;
690 }
691 }
692 }
693
694 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
695 // succeed trivially.
696 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
697 return true;
698 }
699
700 // Check for special relaxations
701 return can_relax_access_check_for(current_class, member_class, classloader_only);
702 }
703
704 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
705 return InstanceKlass::cast(class1)->is_same_class_package(class2);
706 }
707
708 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
709 // throw an incompatible class change exception
710 // If inner_is_member, require the inner to be a member of the outer.
711 // If !inner_is_member, require the inner to be unsafe anonymous (a non-member).
712 // Caller is responsible for figuring out in advance which case must be true.
713 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
714 bool inner_is_member, TRAPS) {
715 InnerClassesIterator iter(outer);
716 constantPoolHandle cp (THREAD, outer->constants());
717 for (; !iter.done(); iter.next()) {
718 int ioff = iter.inner_class_info_index();
719 int ooff = iter.outer_class_info_index();
720
721 if (inner_is_member && ioff != 0 && ooff != 0) {
722 if (cp->klass_name_at_matches(outer, ooff) &&
723 cp->klass_name_at_matches(inner, ioff)) {
724 Klass* o = cp->klass_at(ooff, CHECK);
725 if (o == outer) {
726 Klass* i = cp->klass_at(ioff, CHECK);
727 if (i == inner) {
728 return;
729 }
730 }
731 }
732 }
733
734 if (!inner_is_member && ioff != 0 && ooff == 0 &&
735 cp->klass_name_at_matches(inner, ioff)) {
736 Klass* i = cp->klass_at(ioff, CHECK);
737 if (i == inner) {
738 return;
739 }
740 }
741 }
742
743 // 'inner' not declared as an inner klass in outer
744 ResourceMark rm(THREAD);
745 Exceptions::fthrow(
746 THREAD_AND_LOCATION,
747 vmSymbols::java_lang_IncompatibleClassChangeError(),
748 "%s and %s disagree on InnerClasses attribute",
749 outer->external_name(),
750 inner->external_name()
751 );
752 }
753
754 // Utility method converting a single SignatureStream element into java.lang.Class instance
755 static oop get_mirror_from_signature(const methodHandle& method,
756 SignatureStream* ss,
757 TRAPS) {
758
759
760 if (T_OBJECT == ss->type() || T_ARRAY == ss->type()) {
761 Symbol* name = ss->as_symbol(CHECK_NULL);
762 oop loader = method->method_holder()->class_loader();
763 oop protection_domain = method->method_holder()->protection_domain();
764 const Klass* k = SystemDictionary::resolve_or_fail(name,
765 Handle(THREAD, loader),
766 Handle(THREAD, protection_domain),
767 true,
768 CHECK_NULL);
769 if (log_is_enabled(Debug, class, resolve)) {
770 trace_class_resolution(k);
771 }
772 return k->java_mirror();
773 }
774
775 assert(ss->type() != T_VOID || ss->at_return_type(),
776 "T_VOID should only appear as return type");
777
778 return java_lang_Class::primitive_mirror(ss->type());
779 }
780
781 static objArrayHandle get_parameter_types(const methodHandle& method,
782 int parameter_count,
783 oop* return_type,
784 TRAPS) {
785 // Allocate array holding parameter types (java.lang.Class instances)
786 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
787 objArrayHandle mirrors(THREAD, m);
788 int index = 0;
789 // Collect parameter types
790 ResourceMark rm(THREAD);
791 Symbol* signature = method->signature();
792 SignatureStream ss(signature);
793 while (!ss.at_return_type()) {
794 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
795 mirrors->obj_at_put(index++, mirror);
796 ss.next();
797 }
798 assert(index == parameter_count, "invalid parameter count");
799 if (return_type != NULL) {
800 // Collect return type as well
801 assert(ss.at_return_type(), "return type should be present");
802 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
803 }
804 return mirrors;
805 }
806
807 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
808 return method->resolved_checked_exceptions(THREAD);
809 }
810
811 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
812 // Basic types
813 BasicType type = vmSymbols::signature_type(signature);
814 if (type != T_OBJECT) {
815 return Handle(THREAD, Universe::java_mirror(type));
816 }
817
818 Klass* result =
819 SystemDictionary::resolve_or_fail(signature,
820 Handle(THREAD, k->class_loader()),
821 Handle(THREAD, k->protection_domain()),
822 true, CHECK_(Handle()));
823
824 if (log_is_enabled(Debug, class, resolve)) {
825 trace_class_resolution(result);
826 }
827
828 oop nt = result->java_mirror();
829 return Handle(THREAD, nt);
830 }
831
832
833 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
834 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
835 assert(!method()->is_initializer() ||
836 (for_constant_pool_access && method()->is_static()),
837 "should call new_constructor instead");
838 InstanceKlass* holder = method->method_holder();
839 int slot = method->method_idnum();
840
841 Symbol* signature = method->signature();
842 int parameter_count = ArgumentCount(signature).size();
843 oop return_type_oop = NULL;
844 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
845 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
846
847 Handle return_type(THREAD, return_type_oop);
848
849 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
850
851 if (exception_types.is_null()) return NULL;
852
853 Symbol* method_name = method->name();
854 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
855 Handle name = Handle(THREAD, name_oop);
856 if (name == NULL) return NULL;
857
858 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
859
860 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
861
862 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
863 java_lang_reflect_Method::set_slot(mh(), slot);
864 java_lang_reflect_Method::set_name(mh(), name());
865 java_lang_reflect_Method::set_return_type(mh(), return_type());
866 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
867 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
868 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
869 java_lang_reflect_Method::set_override(mh(), false);
870 if (method->generic_signature() != NULL) {
871 Symbol* gs = method->generic_signature();
872 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
873 java_lang_reflect_Method::set_signature(mh(), sig());
874 }
875 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
876 java_lang_reflect_Method::set_annotations(mh(), an_oop);
877 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
878 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
879 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
880 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
881 return mh();
882 }
883
884
885 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
886 assert(method()->is_initializer(), "should call new_method instead");
887
888 InstanceKlass* holder = method->method_holder();
889 int slot = method->method_idnum();
890
891 Symbol* signature = method->signature();
892 int parameter_count = ArgumentCount(signature).size();
893 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
894 if (parameter_types.is_null()) return NULL;
895
896 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
897 if (exception_types.is_null()) return NULL;
898
899 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
900
901 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
902
903 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
904 java_lang_reflect_Constructor::set_slot(ch(), slot);
905 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
906 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
907 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
908 java_lang_reflect_Constructor::set_override(ch(), false);
909 if (method->generic_signature() != NULL) {
910 Symbol* gs = method->generic_signature();
911 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
912 java_lang_reflect_Constructor::set_signature(ch(), sig());
913 }
914 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
915 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
916 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
917 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
918 return ch();
919 }
920
921
922 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
923 Symbol* field_name = fd->name();
924 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
925 Handle name = Handle(THREAD, name_oop);
926 Symbol* signature = fd->signature();
927 InstanceKlass* holder = fd->field_holder();
928 Handle type = new_type(signature, holder, CHECK_NULL);
929 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
930
931 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
932 java_lang_reflect_Field::set_slot(rh(), fd->index());
933 java_lang_reflect_Field::set_name(rh(), name());
934 java_lang_reflect_Field::set_type(rh(), type());
935 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
936 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
937 java_lang_reflect_Field::set_override(rh(), false);
938 if (fd->has_generic_signature()) {
939 Symbol* gs = fd->generic_signature();
940 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
941 java_lang_reflect_Field::set_signature(rh(), sig());
942 }
943 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
944 java_lang_reflect_Field::set_annotations(rh(), an_oop);
945 return rh();
946 }
947
948 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
949 int flags, TRAPS) {
950
951 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
952
953 if(NULL != sym) {
954 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
955 java_lang_reflect_Parameter::set_name(rh(), name());
956 } else {
957 java_lang_reflect_Parameter::set_name(rh(), NULL);
958 }
959
960 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
961 java_lang_reflect_Parameter::set_executable(rh(), method());
962 java_lang_reflect_Parameter::set_index(rh(), index);
963 return rh();
964 }
965
966
967 static methodHandle resolve_interface_call(InstanceKlass* klass,
968 const methodHandle& method,
969 Klass* recv_klass,
970 Handle receiver,
971 TRAPS) {
972
973 assert(!method.is_null() , "method should not be null");
974
975 CallInfo info;
976 Symbol* signature = method->signature();
977 Symbol* name = method->name();
978 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
979 LinkInfo(klass, name, signature),
980 true,
981 CHECK_(methodHandle()));
982 return info.selected_method();
983 }
984
985 // Conversion
986 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
987 assert(java_lang_Class::is_primitive(basic_type_mirror),
988 "just checking");
989 return java_lang_Class::primitive_type(basic_type_mirror);
990 }
991
992 // Narrowing of basic types. Used to create correct jvalues for
993 // boolean, byte, char and short return return values from interpreter
994 // which are returned as ints. Throws IllegalArgumentException.
995 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
996 switch (narrow_type) {
997 case T_BOOLEAN:
998 value->z = (jboolean) (value->i & 1);
999 return;
1000 case T_BYTE:
1001 value->b = (jbyte)value->i;
1002 return;
1003 case T_CHAR:
1004 value->c = (jchar)value->i;
1005 return;
1006 case T_SHORT:
1007 value->s = (jshort)value->i;
1008 return;
1009 default:
1010 break; // fail
1011 }
1012 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1013 }
1014
1015
1016 // Method call (shared by invoke_method and invoke_constructor)
1017 static oop invoke(InstanceKlass* klass,
1018 const methodHandle& reflected_method,
1019 Handle receiver,
1020 bool override,
1021 objArrayHandle ptypes,
1022 BasicType rtype,
1023 objArrayHandle args,
1024 bool is_method_invoke,
1025 TRAPS) {
1026
1027 ResourceMark rm(THREAD);
1028
1029 methodHandle method; // actual method to invoke
1030 Klass* target_klass; // target klass, receiver's klass for non-static
1031
1032 // Ensure klass is initialized
1033 klass->initialize(CHECK_NULL);
1034
1035 bool is_static = reflected_method->is_static();
1036 if (is_static) {
1037 // ignore receiver argument
1038 method = reflected_method;
1039 target_klass = klass;
1040 } else {
1041 // check for null receiver
1042 if (receiver.is_null()) {
1043 THROW_0(vmSymbols::java_lang_NullPointerException());
1044 }
1045 // Check class of receiver against class declaring method
1046 if (!receiver->is_a(klass)) {
1047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1048 }
1049 // target klass is receiver's klass
1050 target_klass = receiver->klass();
1051 // no need to resolve if method is private or <init>
1052 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
1053 method = reflected_method;
1054 } else {
1055 // resolve based on the receiver
1056 if (reflected_method->method_holder()->is_interface()) {
1057 // resolve interface call
1058 //
1059 // Match resolution errors with those thrown due to reflection inlining
1060 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1061 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1062 if (HAS_PENDING_EXCEPTION) {
1063 // Method resolution threw an exception; wrap it in an InvocationTargetException
1064 oop resolution_exception = PENDING_EXCEPTION;
1065 CLEAR_PENDING_EXCEPTION;
1066 // JVMTI has already reported the pending exception
1067 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1068 if (THREAD->is_Java_thread()) {
1069 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1070 }
1071 JavaCallArguments args(Handle(THREAD, resolution_exception));
1072 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1073 vmSymbols::throwable_void_signature(),
1074 &args);
1075 }
1076 } else {
1077 // if the method can be overridden, we resolve using the vtable index.
1078 assert(!reflected_method->has_itable_index(), "");
1079 int index = reflected_method->vtable_index();
1080 method = reflected_method;
1081 if (index != Method::nonvirtual_vtable_index) {
1082 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1083 }
1084 if (!method.is_null()) {
1085 // Check for abstract methods as well
1086 if (method->is_abstract()) {
1087 // new default: 6531596
1088 ResourceMark rm(THREAD);
1089 Handle h_origexception = Exceptions::new_exception(THREAD,
1090 vmSymbols::java_lang_AbstractMethodError(),
1091 Method::name_and_sig_as_C_string(target_klass,
1092 method->name(),
1093 method->signature()));
1094 JavaCallArguments args(h_origexception);
1095 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1096 vmSymbols::throwable_void_signature(),
1097 &args);
1098 }
1099 }
1100 }
1101 }
1102 }
1103
1104 // I believe this is a ShouldNotGetHere case which requires
1105 // an internal vtable bug. If you ever get this please let Karen know.
1106 if (method.is_null()) {
1107 ResourceMark rm(THREAD);
1108 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
1109 Method::name_and_sig_as_C_string(klass,
1110 reflected_method->name(),
1111 reflected_method->signature()));
1112 }
1113
1114 assert(ptypes->is_objArray(), "just checking");
1115 int args_len = args.is_null() ? 0 : args->length();
1116 // Check number of arguments
1117 if (ptypes->length() != args_len) {
1118 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1119 "wrong number of arguments");
1120 }
1121
1122 // Create object to contain parameters for the JavaCall
1123 JavaCallArguments java_args(method->size_of_parameters());
1124
1125 if (!is_static) {
1126 java_args.push_oop(receiver);
1127 }
1128
1129 for (int i = 0; i < args_len; i++) {
1130 oop type_mirror = ptypes->obj_at(i);
1131 oop arg = args->obj_at(i);
1132 if (java_lang_Class::is_primitive(type_mirror)) {
1133 jvalue value;
1134 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1135 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1136 if (ptype != atype) {
1137 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1138 }
1139 switch (ptype) {
1140 case T_BOOLEAN: java_args.push_int(value.z); break;
1141 case T_CHAR: java_args.push_int(value.c); break;
1142 case T_BYTE: java_args.push_int(value.b); break;
1143 case T_SHORT: java_args.push_int(value.s); break;
1144 case T_INT: java_args.push_int(value.i); break;
1145 case T_LONG: java_args.push_long(value.j); break;
1146 case T_FLOAT: java_args.push_float(value.f); break;
1147 case T_DOUBLE: java_args.push_double(value.d); break;
1148 default:
1149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1150 }
1151 } else {
1152 if (arg != NULL) {
1153 Klass* k = java_lang_Class::as_Klass(type_mirror);
1154 if (!arg->is_a(k)) {
1155 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1156 "argument type mismatch");
1157 }
1158 }
1159 Handle arg_handle(THREAD, arg); // Create handle for argument
1160 java_args.push_oop(arg_handle); // Push handle
1161 }
1162 }
1163
1164 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1165 "just checking");
1166
1167 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1168 // oop (i.e., NOT as an handle)
1169 JavaValue result(rtype);
1170 JavaCalls::call(&result, method, &java_args, THREAD);
1171
1172 if (HAS_PENDING_EXCEPTION) {
1173 // Method threw an exception; wrap it in an InvocationTargetException
1174 oop target_exception = PENDING_EXCEPTION;
1175 CLEAR_PENDING_EXCEPTION;
1176 // JVMTI has already reported the pending exception
1177 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1178 if (THREAD->is_Java_thread()) {
1179 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1180 }
1181
1182 JavaCallArguments args(Handle(THREAD, target_exception));
1183 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1184 vmSymbols::throwable_void_signature(),
1185 &args);
1186 } else {
1187 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1188 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1189 }
1190 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1191 }
1192 }
1193
1194 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1195 // of java.lang.reflect.Constructor
1196
1197 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1198 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1199 int slot = java_lang_reflect_Method::slot(method_mirror);
1200 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1201 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1202
1203 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1204 BasicType rtype;
1205 if (java_lang_Class::is_primitive(return_type_mirror)) {
1206 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1207 } else {
1208 rtype = T_OBJECT;
1209 }
1210
1211 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1212 Method* m = klass->method_with_idnum(slot);
1213 if (m == NULL) {
1214 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1215 }
1216 methodHandle method(THREAD, m);
1217
1218 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1219 }
1220
1221
1222 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1223 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1224 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1225 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1226 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1227
1228 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1229 Method* m = klass->method_with_idnum(slot);
1230 if (m == NULL) {
1231 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1232 }
1233 methodHandle method(THREAD, m);
1234 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1235
1236 // Make sure klass gets initialize
1237 klass->initialize(CHECK_NULL);
1238
1239 // Create new instance (the receiver)
1240 klass->check_valid_for_instantiation(false, CHECK_NULL);
1241 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1242
1243 // Ignore result from call and return receiver
1244 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1245 return receiver();
1246 }