1 /*
2 * Copyright (c) 1997, 2020, 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.inline.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/thread.inline.hpp"
53 #include "runtime/vframe.inline.hpp"
54
55 static void trace_class_resolution(oop mirror) {
56 if (mirror == NULL || java_lang_Class::is_primitive(mirror)) {
57 return;
58 }
59 Klass* to_class = java_lang_Class::as_Klass(mirror);
60 ResourceMark rm;
61 int line_number = -1;
62 const char * source_file = NULL;
63 Klass* caller = NULL;
64 JavaThread* jthread = JavaThread::current();
65 if (jthread->has_last_Java_frame()) {
66 vframeStream vfst(jthread);
67 // skip over any frames belonging to java.lang.Class
68 while (!vfst.at_end() &&
69 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
70 vfst.next();
71 }
72 if (!vfst.at_end()) {
73 // this frame is a likely suspect
74 caller = vfst.method()->method_holder();
75 line_number = vfst.method()->line_number_from_bci(vfst.bci());
76 Symbol* s = vfst.method()->method_holder()->source_file_name();
77 if (s != NULL) {
78 source_file = s->as_C_string();
79 }
80 }
81 }
82 if (caller != NULL) {
83 const char * from = caller->external_name();
84 const char * to = to_class->external_name();
85 // print in a single call to reduce interleaving between threads
86 if (source_file != NULL) {
87 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
88 } else {
89 log_debug(class, resolve)("%s %s (reflection)", from, to);
90 }
91 }
92 }
93
94
95 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
96 if (type == T_VOID) {
97 return NULL;
98 }
99 if (is_reference_type(type)) {
100 // regular objects are not boxed
101 return (oop) value->l;
102 }
103 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
104 if (result == NULL) {
105 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
106 }
107 return result;
108 }
109
110
111 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
112 if (box == NULL) {
113 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
114 }
115 return java_lang_boxing_object::get_value(box, value);
116 }
117
118 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
119 // Note: box is really the unboxed oop. It might even be a Short, etc.!
120 value->l = cast_from_oop<jobject>(box);
121 return T_OBJECT;
122 }
123
124
125 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
126 assert(wide_type != current_type, "widen should not be called with identical types");
127 switch (wide_type) {
128 case T_BOOLEAN:
129 case T_BYTE:
130 case T_CHAR:
131 break; // fail
132 case T_SHORT:
133 switch (current_type) {
134 case T_BYTE:
135 value->s = (jshort) value->b;
136 return;
137 default:
138 break;
139 }
140 break; // fail
141 case T_INT:
142 switch (current_type) {
143 case T_BYTE:
144 value->i = (jint) value->b;
145 return;
146 case T_CHAR:
147 value->i = (jint) value->c;
148 return;
149 case T_SHORT:
150 value->i = (jint) value->s;
151 return;
152 default:
153 break;
154 }
155 break; // fail
156 case T_LONG:
157 switch (current_type) {
158 case T_BYTE:
159 value->j = (jlong) value->b;
160 return;
161 case T_CHAR:
162 value->j = (jlong) value->c;
163 return;
164 case T_SHORT:
165 value->j = (jlong) value->s;
166 return;
167 case T_INT:
168 value->j = (jlong) value->i;
169 return;
170 default:
171 break;
172 }
173 break; // fail
174 case T_FLOAT:
175 switch (current_type) {
176 case T_BYTE:
177 value->f = (jfloat) value->b;
178 return;
179 case T_CHAR:
180 value->f = (jfloat) value->c;
181 return;
182 case T_SHORT:
183 value->f = (jfloat) value->s;
184 return;
185 case T_INT:
186 value->f = (jfloat) value->i;
187 return;
188 case T_LONG:
189 value->f = (jfloat) value->j;
190 return;
191 default:
192 break;
193 }
194 break; // fail
195 case T_DOUBLE:
196 switch (current_type) {
197 case T_BYTE:
198 value->d = (jdouble) value->b;
199 return;
200 case T_CHAR:
201 value->d = (jdouble) value->c;
202 return;
203 case T_SHORT:
204 value->d = (jdouble) value->s;
205 return;
206 case T_INT:
207 value->d = (jdouble) value->i;
208 return;
209 case T_FLOAT:
210 value->d = (jdouble) value->f;
211 return;
212 case T_LONG:
213 value->d = (jdouble) value->j;
214 return;
215 default:
216 break;
217 }
218 break; // fail
219 default:
220 break; // fail
221 }
222 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
223 }
224
225
226 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
227 if (!a->is_within_bounds(index)) {
228 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
229 }
230 if (a->is_objArray()) {
231 value->l = cast_from_oop<jobject>(objArrayOop(a)->obj_at(index));
232 return T_OBJECT;
233 } else {
234 assert(a->is_typeArray(), "just checking");
235 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
236 switch (type) {
237 case T_BOOLEAN:
238 value->z = typeArrayOop(a)->bool_at(index);
239 break;
240 case T_CHAR:
241 value->c = typeArrayOop(a)->char_at(index);
242 break;
243 case T_FLOAT:
244 value->f = typeArrayOop(a)->float_at(index);
245 break;
246 case T_DOUBLE:
247 value->d = typeArrayOop(a)->double_at(index);
248 break;
249 case T_BYTE:
250 value->b = typeArrayOop(a)->byte_at(index);
251 break;
252 case T_SHORT:
253 value->s = typeArrayOop(a)->short_at(index);
254 break;
255 case T_INT:
256 value->i = typeArrayOop(a)->int_at(index);
257 break;
258 case T_LONG:
259 value->j = typeArrayOop(a)->long_at(index);
260 break;
261 default:
262 return T_ILLEGAL;
263 }
264 return type;
265 }
266 }
267
268
269 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
270 if (!a->is_within_bounds(index)) {
271 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
272 }
273 if (a->is_objArray()) {
274 if (value_type == T_OBJECT) {
275 oop obj = (oop) value->l;
276 if (obj != NULL) {
277 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
278 if (!obj->is_a(element_klass)) {
279 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
280 }
281 }
282 objArrayOop(a)->obj_at_put(index, obj);
283 }
284 } else {
285 assert(a->is_typeArray(), "just checking");
286 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
287 if (array_type != value_type) {
288 // The widen operation can potentially throw an exception, but cannot block,
289 // so typeArrayOop a is safe if the call succeeds.
290 widen(value, value_type, array_type, CHECK);
291 }
292 switch (array_type) {
293 case T_BOOLEAN:
294 typeArrayOop(a)->bool_at_put(index, value->z);
295 break;
296 case T_CHAR:
297 typeArrayOop(a)->char_at_put(index, value->c);
298 break;
299 case T_FLOAT:
300 typeArrayOop(a)->float_at_put(index, value->f);
301 break;
302 case T_DOUBLE:
303 typeArrayOop(a)->double_at_put(index, value->d);
304 break;
305 case T_BYTE:
306 typeArrayOop(a)->byte_at_put(index, value->b);
307 break;
308 case T_SHORT:
309 typeArrayOop(a)->short_at_put(index, value->s);
310 break;
311 case T_INT:
312 typeArrayOop(a)->int_at_put(index, value->i);
313 break;
314 case T_LONG:
315 typeArrayOop(a)->long_at_put(index, value->j);
316 break;
317 default:
318 THROW(vmSymbols::java_lang_IllegalArgumentException());
319 }
320 }
321 }
322
323 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
324 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
325 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
326 if (type == T_VOID) {
327 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
328 }
329 else {
330 return Universe::typeArrayKlassObj(type);
331 }
332 }
333
334 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
335 if (element_mirror == NULL) {
336 THROW_0(vmSymbols::java_lang_NullPointerException());
337 }
338 if (length < 0) {
339 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
340 }
341 if (java_lang_Class::is_primitive(element_mirror)) {
342 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
343 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
344 } else {
345 Klass* k = java_lang_Class::as_Klass(element_mirror);
346 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
347 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
348 }
349 return oopFactory::new_objArray(k, length, THREAD);
350 }
351 }
352
353
354 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
355 assert(dim_array->is_typeArray(), "just checking");
356 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
357
358 if (element_mirror == NULL) {
359 THROW_0(vmSymbols::java_lang_NullPointerException());
360 }
361
362 int len = dim_array->length();
363 if (len <= 0 || len > MAX_DIM) {
364 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
365 }
366
367 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
368 for (int i = 0; i < len; i++) {
369 int d = dim_array->int_at(i);
370 if (d < 0) {
371 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
372 }
373 dimensions[i] = d;
374 }
375
376 Klass* klass;
377 int dim = len;
378 if (java_lang_Class::is_primitive(element_mirror)) {
379 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
380 } else {
381 klass = java_lang_Class::as_Klass(element_mirror);
382 if (klass->is_array_klass()) {
383 int k_dim = ArrayKlass::cast(klass)->dimension();
384 if (k_dim + len > MAX_DIM) {
385 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
386 }
387 dim += k_dim;
388 }
389 }
390 klass = klass->array_klass(dim, CHECK_NULL);
391 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
392 assert(obj->is_array(), "just checking");
393 return arrayOop(obj);
394 }
395
396
397 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
398 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
399 for (;;) {
400 const InstanceKlass* hc = ik->unsafe_anonymous_host();
401 if (hc == NULL) return false;
402 if (hc == unsafe_anonymous_host) return true;
403 ik = hc;
404
405 // There's no way to make a host class loop short of patching memory.
406 // Therefore there cannot be a loop here unless there's another bug.
407 // Still, let's check for it.
408 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop");
409 }
410 }
411
412 static bool can_relax_access_check_for(const Klass* accessor,
413 const Klass* accessee,
414 bool classloader_only) {
415
416 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
417 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
418
419 // If either is on the other's unsafe_anonymous_host chain, access is OK,
420 // because one is inside the other.
421 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) ||
422 under_unsafe_anonymous_host(accessee_ik, accessor_ik))
423 return true;
424
425 if (RelaxAccessControlCheck &&
426 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
427 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) {
428 return classloader_only &&
429 Verifier::relax_access_for(accessor_ik->class_loader()) &&
430 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
431 accessor_ik->class_loader() == accessee_ik->class_loader();
432 }
433
434 return false;
435 }
436
437 /*
438 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
439
440 Callee T in Callee T in package PT,
441 unnamed module runtime module MT
442 ------------------------------------------------------------------------------------------------
443
444 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
445 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
446 unnamed module: YES
447 Else if (MS can read MT (establish readability) &&
448 ((MT exports PT to MS or to all modules) ||
449 (MT is open))): YES
450
451 ------------------------------------------------------------------------------------------------
452 Caller S in unnamed YES Readability exists because unnamed module
453 module UM "reads" all modules
454 if (MT exports PT to UM or to all modules): YES
455
456 ------------------------------------------------------------------------------------------------
457
458 Note: a loose module is a module that can read all current and future unnamed modules.
459 */
460 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
461 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
462
463 // Verify that current_class can access new_class. If the classloader_only
464 // flag is set, we automatically allow any accesses in which current_class
465 // doesn't have a classloader.
466 if ((current_class == NULL) ||
467 (current_class == new_class) ||
468 is_same_class_package(current_class, new_class)) {
469 return ACCESS_OK;
470 }
471 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
472 // succeed trivially.
473 if (SystemDictionary::reflect_MagicAccessorImpl_klass_is_loaded() &&
474 current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
475 return ACCESS_OK;
476 }
477
478 // module boundaries
479 if (new_class->is_public()) {
480 // Ignore modules for DumpSharedSpaces because we do not have any package
481 // or module information for modules other than java.base.
482 if (DumpSharedSpaces) {
483 return ACCESS_OK;
484 }
485
486 // Find the module entry for current_class, the accessor
487 ModuleEntry* module_from = current_class->module();
488 // Find the module entry for new_class, the accessee
489 ModuleEntry* module_to = new_class->module();
490
491 // both in same (possibly unnamed) module
492 if (module_from == module_to) {
493 return ACCESS_OK;
494 }
495
496 // Acceptable access to a type in an unnamed module. Note that since
497 // unnamed modules can read all unnamed modules, this also handles the
498 // case where module_from is also unnamed but in a different class loader.
499 if (!module_to->is_named() &&
500 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
501 return ACCESS_OK;
502 }
503
504 // Establish readability, check if module_from is allowed to read module_to.
505 if (!module_from->can_read(module_to)) {
506 return MODULE_NOT_READABLE;
507 }
508
509 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
510 if (module_to->is_open()) {
511 return ACCESS_OK;
512 }
513
514 PackageEntry* package_to = new_class->package();
515 assert(package_to != NULL, "can not obtain new_class' package");
516
517 {
518 MutexLocker m1(Module_lock);
519
520 // Once readability is established, if module_to exports T unqualifiedly,
521 // (to all modules), than whether module_from is in the unnamed module
522 // or not does not matter, access is allowed.
523 if (package_to->is_unqual_exported()) {
524 return ACCESS_OK;
525 }
526
527 // Access is allowed if both 1 & 2 hold:
528 // 1. Readability, module_from can read module_to (established above).
529 // 2. Either module_to exports T to module_from qualifiedly.
530 // or
531 // module_to exports T to all unnamed modules and module_from is unnamed.
532 // or
533 // module_to exports T unqualifiedly to all modules (checked above).
534 if (!package_to->is_qexported_to(module_from)) {
535 return TYPE_NOT_EXPORTED;
536 }
537 }
538 return ACCESS_OK;
539 }
540
541 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
542 return ACCESS_OK;
543 }
544 return OTHER_PROBLEM;
545 }
546
547 // Return an error message specific to the specified Klass*'s and result.
548 // This function must be called from within a block containing a ResourceMark.
549 char* Reflection::verify_class_access_msg(const Klass* current_class,
550 const InstanceKlass* new_class,
551 const VerifyClassAccessResults result) {
552 assert(result != ACCESS_OK, "must be failure result");
553 char * msg = NULL;
554 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) {
555 // Find the module entry for current_class, the accessor
556 ModuleEntry* module_from = current_class->module();
557 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
558 const char * current_class_name = current_class->external_name();
559
560 // Find the module entry for new_class, the accessee
561 ModuleEntry* module_to = NULL;
562 module_to = new_class->module();
563 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
564 const char * new_class_name = new_class->external_name();
565
566 if (result == MODULE_NOT_READABLE) {
567 assert(module_from->is_named(), "Unnamed modules can read all modules");
568 if (module_to->is_named()) {
569 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
570 strlen(new_class_name) + 2*strlen(module_to_name);
571 msg = NEW_RESOURCE_ARRAY(char, len);
572 jio_snprintf(msg, len - 1,
573 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
574 current_class_name, module_from_name, new_class_name,
575 module_to_name, module_from_name, module_to_name);
576 } else {
577 oop jlm = module_to->module();
578 assert(jlm != NULL, "Null jlm in module_to ModuleEntry");
579 intptr_t identity_hash = jlm->identity_hash();
580 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
581 strlen(new_class_name) + 2*sizeof(uintx);
582 msg = NEW_RESOURCE_ARRAY(char, len);
583 jio_snprintf(msg, len - 1,
584 "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,
585 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
586 module_from_name, uintx(identity_hash));
587 }
588
589 } else if (result == TYPE_NOT_EXPORTED) {
590 assert(new_class->package() != NULL,
591 "Unnamed packages are always exported");
592 const char * package_name =
593 new_class->package()->name()->as_klass_external_name();
594 assert(module_to->is_named(), "Unnamed modules export all packages");
595 if (module_from->is_named()) {
596 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
597 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
598 msg = NEW_RESOURCE_ARRAY(char, len);
599 jio_snprintf(msg, len - 1,
600 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
601 current_class_name, module_from_name, new_class_name,
602 module_to_name, module_to_name, package_name, module_from_name);
603 } else {
604 oop jlm = module_from->module();
605 assert(jlm != NULL, "Null jlm in module_from ModuleEntry");
606 intptr_t identity_hash = jlm->identity_hash();
607 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
608 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
609 msg = NEW_RESOURCE_ARRAY(char, len);
610 jio_snprintf(msg, len - 1,
611 "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,
612 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
613 module_to_name, package_name, uintx(identity_hash));
614 }
615 } else {
616 ShouldNotReachHere();
617 }
618 } // result != OTHER_PROBLEM...
619 return msg;
620 }
621
622 bool Reflection::verify_member_access(const Klass* current_class,
623 const Klass* resolved_class,
624 const Klass* member_class,
625 AccessFlags access,
626 bool classloader_only,
627 bool protected_restriction,
628 TRAPS) {
629 // Verify that current_class can access a member of member_class, where that
630 // field's access bits are "access". We assume that we've already verified
631 // that current_class can access member_class.
632 //
633 // If the classloader_only flag is set, we automatically allow any accesses
634 // in which current_class doesn't have a classloader.
635 //
636 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
637 // need this distinction (e.g. if all we have is the runtime type, or during
638 // class file parsing when we only care about the static type); in that case
639 // callers should ensure that resolved_class == member_class.
640 //
641 if ((current_class == NULL) ||
642 (current_class == member_class) ||
643 access.is_public()) {
644 return true;
645 }
646
647 const Klass* host_class = current_class;
648 if (current_class->is_instance_klass() &&
649 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) {
650 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host();
651 assert(host_class != NULL, "Unsafe anonymous class has null host class");
652 assert(!(host_class->is_instance_klass() &&
653 InstanceKlass::cast(host_class)->is_unsafe_anonymous()),
654 "unsafe_anonymous_host should not be unsafe anonymous itself");
655 }
656 if (host_class == member_class) {
657 return true;
658 }
659
660 if (access.is_protected()) {
661 if (!protected_restriction) {
662 // See if current_class (or outermost host class) is a subclass of member_class
663 // An interface may not access protected members of j.l.Object
664 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) {
665 if (access.is_static() || // static fields are ok, see 6622385
666 current_class == resolved_class ||
667 member_class == resolved_class ||
668 host_class->is_subclass_of(resolved_class) ||
669 resolved_class->is_subclass_of(host_class)) {
670 return true;
671 }
672 }
673 }
674 }
675
676 // package access
677 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
678 return true;
679 }
680
681 // private access between different classes needs a nestmate check, but
682 // not for unsafe anonymous classes - so check host_class
683 if (access.is_private() && host_class == current_class) {
684 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
685 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
686 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
687 // Nestmate access checks may require resolution and validation of the nest-host.
688 // It is up to the caller to check for pending exceptions and handle appropriately.
689 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
690 if (access) {
691 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
692 return true;
693 }
694 }
695 }
696
697 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
698 // succeed trivially.
699 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
700 return true;
701 }
702
703 // Check for special relaxations
704 return can_relax_access_check_for(current_class, member_class, classloader_only);
705 }
706
707 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
708 return InstanceKlass::cast(class1)->is_same_class_package(class2);
709 }
710
711 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
712 // throw an incompatible class change exception
713 // If inner_is_member, require the inner to be a member of the outer.
714 // If !inner_is_member, require the inner to be unsafe anonymous (a non-member).
715 // Caller is responsible for figuring out in advance which case must be true.
716 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
717 bool inner_is_member, TRAPS) {
718 InnerClassesIterator iter(outer);
719 constantPoolHandle cp (THREAD, outer->constants());
720 for (; !iter.done(); iter.next()) {
721 int ioff = iter.inner_class_info_index();
722 int ooff = iter.outer_class_info_index();
723
724 if (inner_is_member && ioff != 0 && ooff != 0) {
725 if (cp->klass_name_at_matches(outer, ooff) &&
726 cp->klass_name_at_matches(inner, ioff)) {
727 Klass* o = cp->klass_at(ooff, CHECK);
728 if (o == outer) {
729 Klass* i = cp->klass_at(ioff, CHECK);
730 if (i == inner) {
731 return;
732 }
733 }
734 }
735 }
736
737 if (!inner_is_member && ioff != 0 && ooff == 0 &&
738 cp->klass_name_at_matches(inner, ioff)) {
739 Klass* i = cp->klass_at(ioff, CHECK);
740 if (i == inner) {
741 return;
742 }
743 }
744 }
745
746 // 'inner' not declared as an inner klass in outer
747 ResourceMark rm(THREAD);
748 Exceptions::fthrow(
749 THREAD_AND_LOCATION,
750 vmSymbols::java_lang_IncompatibleClassChangeError(),
751 "%s and %s disagree on InnerClasses attribute",
752 outer->external_name(),
753 inner->external_name()
754 );
755 }
756
757 static objArrayHandle get_parameter_types(const methodHandle& method,
758 int parameter_count,
759 oop* return_type,
760 TRAPS) {
761 // Allocate array holding parameter types (java.lang.Class instances)
762 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
763 objArrayHandle mirrors(THREAD, m);
764 int index = 0;
765 // Collect parameter types
766 ResourceMark rm(THREAD);
767 for (ResolvingSignatureStream ss(method()); !ss.is_done(); ss.next()) {
768 oop mirror = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_(objArrayHandle()));
769 if (log_is_enabled(Debug, class, resolve)) {
770 trace_class_resolution(mirror);
771 }
772 if (!ss.at_return_type()) {
773 mirrors->obj_at_put(index++, mirror);
774 } else if (return_type != NULL) {
775 // Collect return type as well
776 assert(ss.at_return_type(), "return type should be present");
777 *return_type = mirror;
778 }
779 }
780 assert(index == parameter_count, "invalid parameter count");
781 return mirrors;
782 }
783
784 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
785 return method->resolved_checked_exceptions(THREAD);
786 }
787
788 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
789 ResolvingSignatureStream ss(signature, k, false);
790 oop nt = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_NH);
791 if (log_is_enabled(Debug, class, resolve)) {
792 trace_class_resolution(nt);
793 }
794 return Handle(THREAD, nt);
795 }
796
797
798 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
799 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
800 assert(!method()->is_initializer() ||
801 (for_constant_pool_access && method()->is_static()),
802 "should call new_constructor instead");
803 InstanceKlass* holder = method->method_holder();
804 int slot = method->method_idnum();
805
806 Symbol* signature = method->signature();
807 int parameter_count = ArgumentCount(signature).size();
808 oop return_type_oop = NULL;
809 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
810 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
811
812 Handle return_type(THREAD, return_type_oop);
813
814 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
815
816 if (exception_types.is_null()) return NULL;
817
818 Symbol* method_name = method->name();
819 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
820 Handle name = Handle(THREAD, name_oop);
821 if (name == NULL) return NULL;
822
823 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
824
825 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
826
827 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
828 java_lang_reflect_Method::set_slot(mh(), slot);
829 java_lang_reflect_Method::set_name(mh(), name());
830 java_lang_reflect_Method::set_return_type(mh(), return_type());
831 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
832 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
833 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
834 java_lang_reflect_Method::set_override(mh(), false);
835 if (method->generic_signature() != NULL) {
836 Symbol* gs = method->generic_signature();
837 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
838 java_lang_reflect_Method::set_signature(mh(), sig());
839 }
840 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
841 java_lang_reflect_Method::set_annotations(mh(), an_oop);
842 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
843 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
844 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
845 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
846 return mh();
847 }
848
849
850 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
851 assert(method()->is_initializer(), "should call new_method instead");
852
853 InstanceKlass* holder = method->method_holder();
854 int slot = method->method_idnum();
855
856 Symbol* signature = method->signature();
857 int parameter_count = ArgumentCount(signature).size();
858 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
859 if (parameter_types.is_null()) return NULL;
860
861 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
862 if (exception_types.is_null()) return NULL;
863
864 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
865
866 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
867
868 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
869 java_lang_reflect_Constructor::set_slot(ch(), slot);
870 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
871 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
872 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
873 java_lang_reflect_Constructor::set_override(ch(), false);
874 if (method->generic_signature() != NULL) {
875 Symbol* gs = method->generic_signature();
876 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
877 java_lang_reflect_Constructor::set_signature(ch(), sig());
878 }
879 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
880 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
881 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
882 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
883 return ch();
884 }
885
886
887 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
888 Symbol* field_name = fd->name();
889 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
890 Handle name = Handle(THREAD, name_oop);
891 Symbol* signature = fd->signature();
892 InstanceKlass* holder = fd->field_holder();
893 Handle type = new_type(signature, holder, CHECK_NULL);
894 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
895
896 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
897 java_lang_reflect_Field::set_slot(rh(), fd->index());
898 java_lang_reflect_Field::set_name(rh(), name());
899 java_lang_reflect_Field::set_type(rh(), type());
900 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
901 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
902 java_lang_reflect_Field::set_override(rh(), false);
903 if (fd->has_generic_signature()) {
904 Symbol* gs = fd->generic_signature();
905 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
906 java_lang_reflect_Field::set_signature(rh(), sig());
907 }
908 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
909 java_lang_reflect_Field::set_annotations(rh(), an_oop);
910 return rh();
911 }
912
913 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
914 int flags, TRAPS) {
915
916 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
917
918 if(NULL != sym) {
919 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
920 java_lang_reflect_Parameter::set_name(rh(), name());
921 } else {
922 java_lang_reflect_Parameter::set_name(rh(), NULL);
923 }
924
925 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
926 java_lang_reflect_Parameter::set_executable(rh(), method());
927 java_lang_reflect_Parameter::set_index(rh(), index);
928 return rh();
929 }
930
931
932 static methodHandle resolve_interface_call(InstanceKlass* klass,
933 const methodHandle& method,
934 Klass* recv_klass,
935 Handle receiver,
936 TRAPS) {
937
938 assert(!method.is_null() , "method should not be null");
939
940 CallInfo info;
941 Symbol* signature = method->signature();
942 Symbol* name = method->name();
943 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
944 LinkInfo(klass, name, signature),
945 true,
946 CHECK_(methodHandle()));
947 return methodHandle(THREAD, info.selected_method());
948 }
949
950 // Conversion
951 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
952 assert(java_lang_Class::is_primitive(basic_type_mirror),
953 "just checking");
954 return java_lang_Class::primitive_type(basic_type_mirror);
955 }
956
957 // Narrowing of basic types. Used to create correct jvalues for
958 // boolean, byte, char and short return return values from interpreter
959 // which are returned as ints. Throws IllegalArgumentException.
960 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
961 switch (narrow_type) {
962 case T_BOOLEAN:
963 value->z = (jboolean) (value->i & 1);
964 return;
965 case T_BYTE:
966 value->b = (jbyte)value->i;
967 return;
968 case T_CHAR:
969 value->c = (jchar)value->i;
970 return;
971 case T_SHORT:
972 value->s = (jshort)value->i;
973 return;
974 default:
975 break; // fail
976 }
977 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
978 }
979
980
981 // Method call (shared by invoke_method and invoke_constructor)
982 static oop invoke(InstanceKlass* klass,
983 const methodHandle& reflected_method,
984 Handle receiver,
985 bool override,
986 objArrayHandle ptypes,
987 BasicType rtype,
988 objArrayHandle args,
989 bool is_method_invoke,
990 TRAPS) {
991
992 ResourceMark rm(THREAD);
993
994 methodHandle method; // actual method to invoke
995 Klass* target_klass; // target klass, receiver's klass for non-static
996
997 // Ensure klass is initialized
998 klass->initialize(CHECK_NULL);
999
1000 bool is_static = reflected_method->is_static();
1001 if (is_static) {
1002 // ignore receiver argument
1003 method = reflected_method;
1004 target_klass = klass;
1005 } else {
1006 // check for null receiver
1007 if (receiver.is_null()) {
1008 THROW_0(vmSymbols::java_lang_NullPointerException());
1009 }
1010 // Check class of receiver against class declaring method
1011 if (!receiver->is_a(klass)) {
1012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1013 }
1014 // target klass is receiver's klass
1015 target_klass = receiver->klass();
1016 // no need to resolve if method is private or <init>
1017 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
1018 method = reflected_method;
1019 } else {
1020 // resolve based on the receiver
1021 if (reflected_method->method_holder()->is_interface()) {
1022 // resolve interface call
1023 //
1024 // Match resolution errors with those thrown due to reflection inlining
1025 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1026 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1027 if (HAS_PENDING_EXCEPTION) {
1028 // Method resolution threw an exception; wrap it in an InvocationTargetException
1029 oop resolution_exception = PENDING_EXCEPTION;
1030 CLEAR_PENDING_EXCEPTION;
1031 // JVMTI has already reported the pending exception
1032 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1033 if (THREAD->is_Java_thread()) {
1034 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1035 }
1036 JavaCallArguments args(Handle(THREAD, resolution_exception));
1037 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1038 vmSymbols::throwable_void_signature(),
1039 &args);
1040 }
1041 } else {
1042 // if the method can be overridden, we resolve using the vtable index.
1043 assert(!reflected_method->has_itable_index(), "");
1044 int index = reflected_method->vtable_index();
1045 method = reflected_method;
1046 if (index != Method::nonvirtual_vtable_index) {
1047 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1048 }
1049 if (!method.is_null()) {
1050 // Check for abstract methods as well
1051 if (method->is_abstract()) {
1052 // new default: 6531596
1053 ResourceMark rm(THREAD);
1054 stringStream ss;
1055 ss.print("'");
1056 Method::print_external_name(&ss, target_klass, method->name(), method->signature());
1057 ss.print("'");
1058 Handle h_origexception = Exceptions::new_exception(THREAD,
1059 vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1060 JavaCallArguments args(h_origexception);
1061 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1062 vmSymbols::throwable_void_signature(),
1063 &args);
1064 }
1065 }
1066 }
1067 }
1068 }
1069
1070 // I believe this is a ShouldNotGetHere case which requires
1071 // an internal vtable bug. If you ever get this please let Karen know.
1072 if (method.is_null()) {
1073 ResourceMark rm(THREAD);
1074 stringStream ss;
1075 ss.print("'");
1076 Method::print_external_name(&ss, klass,
1077 reflected_method->name(),
1078 reflected_method->signature());
1079 ss.print("'");
1080 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
1081 }
1082
1083 assert(ptypes->is_objArray(), "just checking");
1084 int args_len = args.is_null() ? 0 : args->length();
1085 // Check number of arguments
1086 if (ptypes->length() != args_len) {
1087 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1088 "wrong number of arguments");
1089 }
1090
1091 // Create object to contain parameters for the JavaCall
1092 JavaCallArguments java_args(method->size_of_parameters());
1093
1094 if (!is_static) {
1095 java_args.push_oop(receiver);
1096 }
1097
1098 for (int i = 0; i < args_len; i++) {
1099 oop type_mirror = ptypes->obj_at(i);
1100 oop arg = args->obj_at(i);
1101 if (java_lang_Class::is_primitive(type_mirror)) {
1102 jvalue value;
1103 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1104 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1105 if (ptype != atype) {
1106 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1107 }
1108 switch (ptype) {
1109 case T_BOOLEAN: java_args.push_int(value.z); break;
1110 case T_CHAR: java_args.push_int(value.c); break;
1111 case T_BYTE: java_args.push_int(value.b); break;
1112 case T_SHORT: java_args.push_int(value.s); break;
1113 case T_INT: java_args.push_int(value.i); break;
1114 case T_LONG: java_args.push_long(value.j); break;
1115 case T_FLOAT: java_args.push_float(value.f); break;
1116 case T_DOUBLE: java_args.push_double(value.d); break;
1117 default:
1118 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1119 }
1120 } else {
1121 if (arg != NULL) {
1122 Klass* k = java_lang_Class::as_Klass(type_mirror);
1123 if (!arg->is_a(k)) {
1124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1125 "argument type mismatch");
1126 }
1127 }
1128 Handle arg_handle(THREAD, arg); // Create handle for argument
1129 java_args.push_oop(arg_handle); // Push handle
1130 }
1131 }
1132
1133 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1134 "just checking");
1135
1136 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1137 // oop (i.e., NOT as an handle)
1138 JavaValue result(rtype);
1139 JavaCalls::call(&result, method, &java_args, THREAD);
1140
1141 if (HAS_PENDING_EXCEPTION) {
1142 // Method threw an exception; wrap it in an InvocationTargetException
1143 oop target_exception = PENDING_EXCEPTION;
1144 CLEAR_PENDING_EXCEPTION;
1145 // JVMTI has already reported the pending exception
1146 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1147 if (THREAD->is_Java_thread()) {
1148 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1149 }
1150
1151 JavaCallArguments args(Handle(THREAD, target_exception));
1152 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1153 vmSymbols::throwable_void_signature(),
1154 &args);
1155 } else {
1156 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1157 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1158 }
1159 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1160 }
1161 }
1162
1163 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1164 // of java.lang.reflect.Constructor
1165
1166 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1167 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1168 int slot = java_lang_reflect_Method::slot(method_mirror);
1169 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1170 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1171
1172 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1173 BasicType rtype;
1174 if (java_lang_Class::is_primitive(return_type_mirror)) {
1175 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1176 } else {
1177 rtype = T_OBJECT;
1178 }
1179
1180 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1181 Method* m = klass->method_with_idnum(slot);
1182 if (m == NULL) {
1183 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1184 }
1185 methodHandle method(THREAD, m);
1186
1187 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1188 }
1189
1190
1191 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1192 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1193 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1194 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1195 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1196
1197 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1198 Method* m = klass->method_with_idnum(slot);
1199 if (m == NULL) {
1200 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1201 }
1202 methodHandle method(THREAD, m);
1203 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1204
1205 // Make sure klass gets initialize
1206 klass->initialize(CHECK_NULL);
1207
1208 // Create new instance (the receiver)
1209 klass->check_valid_for_instantiation(false, CHECK_NULL);
1210 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1211
1212 // Ignore result from call and return receiver
1213 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1214 return receiver();
1215 }