1 /*
2 * Copyright (c) 1997, 2019, 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/mutexLocker.inline.hpp"
50 #include "runtime/reflection.hpp"
51 #include "runtime/reflectionUtils.hpp"
52 #include "runtime/signature.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vframe.inline.hpp"
55
56 static void trace_class_resolution(const Klass* to_class) {
57 ResourceMark rm;
58 int line_number = -1;
59 const char * source_file = NULL;
60 Klass* caller = NULL;
61 JavaThread* jthread = JavaThread::current();
62 if (jthread->has_last_Java_frame()) {
63 vframeStream vfst(jthread);
64 // skip over any frames belonging to java.lang.Class
65 while (!vfst.at_end() &&
66 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
67 vfst.next();
68 }
69 if (!vfst.at_end()) {
70 // this frame is a likely suspect
71 caller = vfst.method()->method_holder();
72 line_number = vfst.method()->line_number_from_bci(vfst.bci());
73 Symbol* s = vfst.method()->method_holder()->source_file_name();
74 if (s != NULL) {
75 source_file = s->as_C_string();
76 }
77 }
78 }
79 if (caller != NULL) {
80 const char * from = caller->external_name();
81 const char * to = to_class->external_name();
82 // print in a single call to reduce interleaving between threads
83 if (source_file != NULL) {
84 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
85 } else {
86 log_debug(class, resolve)("%s %s (reflection)", from, to);
87 }
88 }
89 }
90
91
92 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
93 if (type == T_VOID) {
94 return NULL;
95 }
96 if (is_reference_type(type)) {
97 // regular objects are not boxed
98 return (oop) value->l;
99 }
100 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
101 if (result == NULL) {
102 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
103 }
104 return result;
105 }
106
107
108 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
109 if (box == NULL) {
110 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
111 }
112 return java_lang_boxing_object::get_value(box, value);
113 }
114
115 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
116 // Note: box is really the unboxed oop. It might even be a Short, etc.!
117 value->l = (jobject) box;
118 return T_OBJECT;
119 }
120
121
122 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
123 assert(wide_type != current_type, "widen should not be called with identical types");
124 switch (wide_type) {
125 case T_BOOLEAN:
126 case T_BYTE:
127 case T_CHAR:
128 break; // fail
129 case T_SHORT:
130 switch (current_type) {
131 case T_BYTE:
132 value->s = (jshort) value->b;
133 return;
134 default:
135 break;
136 }
137 break; // fail
138 case T_INT:
139 switch (current_type) {
140 case T_BYTE:
141 value->i = (jint) value->b;
142 return;
143 case T_CHAR:
144 value->i = (jint) value->c;
145 return;
146 case T_SHORT:
147 value->i = (jint) value->s;
148 return;
149 default:
150 break;
151 }
152 break; // fail
153 case T_LONG:
154 switch (current_type) {
155 case T_BYTE:
156 value->j = (jlong) value->b;
157 return;
158 case T_CHAR:
159 value->j = (jlong) value->c;
160 return;
161 case T_SHORT:
162 value->j = (jlong) value->s;
163 return;
164 case T_INT:
165 value->j = (jlong) value->i;
166 return;
167 default:
168 break;
169 }
170 break; // fail
171 case T_FLOAT:
172 switch (current_type) {
173 case T_BYTE:
174 value->f = (jfloat) value->b;
175 return;
176 case T_CHAR:
177 value->f = (jfloat) value->c;
178 return;
179 case T_SHORT:
180 value->f = (jfloat) value->s;
181 return;
182 case T_INT:
183 value->f = (jfloat) value->i;
184 return;
185 case T_LONG:
186 value->f = (jfloat) value->j;
187 return;
188 default:
189 break;
190 }
191 break; // fail
192 case T_DOUBLE:
193 switch (current_type) {
194 case T_BYTE:
195 value->d = (jdouble) value->b;
196 return;
197 case T_CHAR:
198 value->d = (jdouble) value->c;
199 return;
200 case T_SHORT:
201 value->d = (jdouble) value->s;
202 return;
203 case T_INT:
204 value->d = (jdouble) value->i;
205 return;
206 case T_FLOAT:
207 value->d = (jdouble) value->f;
208 return;
209 case T_LONG:
210 value->d = (jdouble) value->j;
211 return;
212 default:
213 break;
214 }
215 break; // fail
216 default:
217 break; // fail
218 }
219 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
220 }
221
222
223 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
224 if (!a->is_within_bounds(index)) {
225 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
226 }
227 if (a->is_objArray()) {
228 value->l = (jobject) objArrayOop(a)->obj_at(index);
229 return T_OBJECT;
230 } else {
231 assert(a->is_typeArray(), "just checking");
232 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
233 switch (type) {
234 case T_BOOLEAN:
235 value->z = typeArrayOop(a)->bool_at(index);
236 break;
237 case T_CHAR:
238 value->c = typeArrayOop(a)->char_at(index);
239 break;
240 case T_FLOAT:
241 value->f = typeArrayOop(a)->float_at(index);
242 break;
243 case T_DOUBLE:
244 value->d = typeArrayOop(a)->double_at(index);
245 break;
246 case T_BYTE:
247 value->b = typeArrayOop(a)->byte_at(index);
248 break;
249 case T_SHORT:
250 value->s = typeArrayOop(a)->short_at(index);
251 break;
252 case T_INT:
253 value->i = typeArrayOop(a)->int_at(index);
254 break;
255 case T_LONG:
256 value->j = typeArrayOop(a)->long_at(index);
257 break;
258 default:
259 return T_ILLEGAL;
260 }
261 return type;
262 }
263 }
264
265
266 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
267 if (!a->is_within_bounds(index)) {
268 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
269 }
270 if (a->is_objArray()) {
271 if (value_type == T_OBJECT) {
272 oop obj = (oop) value->l;
273 if (obj != NULL) {
274 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
275 if (!obj->is_a(element_klass)) {
276 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
277 }
278 }
279 objArrayOop(a)->obj_at_put(index, obj);
280 }
281 } else {
282 assert(a->is_typeArray(), "just checking");
283 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
284 if (array_type != value_type) {
285 // The widen operation can potentially throw an exception, but cannot block,
286 // so typeArrayOop a is safe if the call succeeds.
287 widen(value, value_type, array_type, CHECK);
288 }
289 switch (array_type) {
290 case T_BOOLEAN:
291 typeArrayOop(a)->bool_at_put(index, value->z);
292 break;
293 case T_CHAR:
294 typeArrayOop(a)->char_at_put(index, value->c);
295 break;
296 case T_FLOAT:
297 typeArrayOop(a)->float_at_put(index, value->f);
298 break;
299 case T_DOUBLE:
300 typeArrayOop(a)->double_at_put(index, value->d);
301 break;
302 case T_BYTE:
303 typeArrayOop(a)->byte_at_put(index, value->b);
304 break;
305 case T_SHORT:
306 typeArrayOop(a)->short_at_put(index, value->s);
307 break;
308 case T_INT:
309 typeArrayOop(a)->int_at_put(index, value->i);
310 break;
311 case T_LONG:
312 typeArrayOop(a)->long_at_put(index, value->j);
313 break;
314 default:
315 THROW(vmSymbols::java_lang_IllegalArgumentException());
316 }
317 }
318 }
319
320 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
321 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
322 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
323 if (type == T_VOID) {
324 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
325 }
326 else {
327 return Universe::typeArrayKlassObj(type);
328 }
329 }
330
331 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
332 if (element_mirror == NULL) {
333 THROW_0(vmSymbols::java_lang_NullPointerException());
334 }
335 if (length < 0) {
336 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
337 }
338 if (java_lang_Class::is_primitive(element_mirror)) {
339 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
340 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
341 } else {
342 Klass* k = java_lang_Class::as_Klass(element_mirror);
343 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
344 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
345 }
346 return oopFactory::new_objArray(k, length, THREAD);
347 }
348 }
349
350
351 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
352 assert(dim_array->is_typeArray(), "just checking");
353 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
354
355 if (element_mirror == NULL) {
356 THROW_0(vmSymbols::java_lang_NullPointerException());
357 }
358
359 int len = dim_array->length();
360 if (len <= 0 || len > MAX_DIM) {
361 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
362 }
363
364 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
365 for (int i = 0; i < len; i++) {
366 int d = dim_array->int_at(i);
367 if (d < 0) {
368 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
369 }
370 dimensions[i] = d;
371 }
372
373 Klass* klass;
374 int dim = len;
375 if (java_lang_Class::is_primitive(element_mirror)) {
376 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
377 } else {
378 klass = java_lang_Class::as_Klass(element_mirror);
379 if (klass->is_array_klass()) {
380 int k_dim = ArrayKlass::cast(klass)->dimension();
381 if (k_dim + len > MAX_DIM) {
382 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
383 }
384 dim += k_dim;
385 }
386 }
387 klass = klass->array_klass(dim, CHECK_NULL);
388 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
389 assert(obj->is_array(), "just checking");
390 return arrayOop(obj);
391 }
392
393
394 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
395 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
396 for (;;) {
397 const InstanceKlass* hc = ik->unsafe_anonymous_host();
398 if (hc == NULL) return false;
399 if (hc == unsafe_anonymous_host) return true;
400 ik = hc;
401
402 // There's no way to make a host class loop short of patching memory.
403 // Therefore there cannot be a loop here unless there's another bug.
404 // Still, let's check for it.
405 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop");
406 }
407 }
408
409 static bool can_relax_access_check_for(const Klass* accessor,
410 const Klass* accessee,
411 bool classloader_only) {
412
413 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
414 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
415
416 // If either is on the other's unsafe_anonymous_host chain, access is OK,
417 // because one is inside the other.
418 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) ||
419 under_unsafe_anonymous_host(accessee_ik, accessor_ik))
420 return true;
421
422 if (RelaxAccessControlCheck &&
423 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
424 accessee_ik->major_version() < Verifier::NO_RELAX_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 (is_reference_type(ss->type())) {
761 Symbol* name = ss->as_symbol();
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 stringStream ss;
1090 ss.print("'");
1091 Method::print_external_name(&ss, target_klass, method->name(), method->signature());
1092 ss.print("'");
1093 Handle h_origexception = Exceptions::new_exception(THREAD,
1094 vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1095 JavaCallArguments args(h_origexception);
1096 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1097 vmSymbols::throwable_void_signature(),
1098 &args);
1099 }
1100 }
1101 }
1102 }
1103 }
1104
1105 // I believe this is a ShouldNotGetHere case which requires
1106 // an internal vtable bug. If you ever get this please let Karen know.
1107 if (method.is_null()) {
1108 ResourceMark rm(THREAD);
1109 stringStream ss;
1110 ss.print("'");
1111 Method::print_external_name(&ss, klass,
1112 reflected_method->name(),
1113 reflected_method->signature());
1114 ss.print("'");
1115 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
1116 }
1117
1118 assert(ptypes->is_objArray(), "just checking");
1119 int args_len = args.is_null() ? 0 : args->length();
1120 // Check number of arguments
1121 if (ptypes->length() != args_len) {
1122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1123 "wrong number of arguments");
1124 }
1125
1126 // Create object to contain parameters for the JavaCall
1127 JavaCallArguments java_args(method->size_of_parameters());
1128
1129 if (!is_static) {
1130 java_args.push_oop(receiver);
1131 }
1132
1133 for (int i = 0; i < args_len; i++) {
1134 oop type_mirror = ptypes->obj_at(i);
1135 oop arg = args->obj_at(i);
1136 if (java_lang_Class::is_primitive(type_mirror)) {
1137 jvalue value;
1138 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1139 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1140 if (ptype != atype) {
1141 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1142 }
1143 switch (ptype) {
1144 case T_BOOLEAN: java_args.push_int(value.z); break;
1145 case T_CHAR: java_args.push_int(value.c); break;
1146 case T_BYTE: java_args.push_int(value.b); break;
1147 case T_SHORT: java_args.push_int(value.s); break;
1148 case T_INT: java_args.push_int(value.i); break;
1149 case T_LONG: java_args.push_long(value.j); break;
1150 case T_FLOAT: java_args.push_float(value.f); break;
1151 case T_DOUBLE: java_args.push_double(value.d); break;
1152 default:
1153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1154 }
1155 } else {
1156 if (arg != NULL) {
1157 Klass* k = java_lang_Class::as_Klass(type_mirror);
1158 if (!arg->is_a(k)) {
1159 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1160 "argument type mismatch");
1161 }
1162 }
1163 Handle arg_handle(THREAD, arg); // Create handle for argument
1164 java_args.push_oop(arg_handle); // Push handle
1165 }
1166 }
1167
1168 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1169 "just checking");
1170
1171 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1172 // oop (i.e., NOT as an handle)
1173 JavaValue result(rtype);
1174 JavaCalls::call(&result, method, &java_args, THREAD);
1175
1176 if (HAS_PENDING_EXCEPTION) {
1177 // Method threw an exception; wrap it in an InvocationTargetException
1178 oop target_exception = PENDING_EXCEPTION;
1179 CLEAR_PENDING_EXCEPTION;
1180 // JVMTI has already reported the pending exception
1181 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1182 if (THREAD->is_Java_thread()) {
1183 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1184 }
1185
1186 JavaCallArguments args(Handle(THREAD, target_exception));
1187 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1188 vmSymbols::throwable_void_signature(),
1189 &args);
1190 } else {
1191 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1192 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1193 }
1194 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1195 }
1196 }
1197
1198 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1199 // of java.lang.reflect.Constructor
1200
1201 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1202 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1203 int slot = java_lang_reflect_Method::slot(method_mirror);
1204 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1205 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1206
1207 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1208 BasicType rtype;
1209 if (java_lang_Class::is_primitive(return_type_mirror)) {
1210 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1211 } else {
1212 rtype = T_OBJECT;
1213 }
1214
1215 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1216 Method* m = klass->method_with_idnum(slot);
1217 if (m == NULL) {
1218 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1219 }
1220 methodHandle method(THREAD, m);
1221
1222 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1223 }
1224
1225
1226 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1227 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1228 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1229 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1230 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1231
1232 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1233 Method* m = klass->method_with_idnum(slot);
1234 if (m == NULL) {
1235 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1236 }
1237 methodHandle method(THREAD, m);
1238 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1239
1240 // Make sure klass gets initialize
1241 klass->initialize(CHECK_NULL);
1242
1243 // Create new instance (the receiver)
1244 klass->check_valid_for_instantiation(false, CHECK_NULL);
1245 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1246
1247 // Ignore result from call and return receiver
1248 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1249 return receiver();
1250 }