1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/javaClasses.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/valueKlass.hpp"
44 #include "oops/typeArrayOop.inline.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/fieldDescriptor.inline.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/javaCalls.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 #include "utilities/globalDefinitions.hpp"
56
57 static void trace_class_resolution(const Klass* to_class) {
58 ResourceMark rm;
59 int line_number = -1;
60 const char * source_file = NULL;
61 Klass* caller = NULL;
62 JavaThread* jthread = JavaThread::current();
63 if (jthread->has_last_Java_frame()) {
64 vframeStream vfst(jthread);
65 // skip over any frames belonging to java.lang.Class
66 while (!vfst.at_end() &&
67 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
68 vfst.next();
69 }
70 if (!vfst.at_end()) {
71 // this frame is a likely suspect
72 caller = vfst.method()->method_holder();
73 line_number = vfst.method()->line_number_from_bci(vfst.bci());
74 Symbol* s = vfst.method()->method_holder()->source_file_name();
75 if (s != NULL) {
76 source_file = s->as_C_string();
77 }
78 }
79 }
80 if (caller != NULL) {
81 const char * from = caller->external_name();
82 const char * to = to_class->external_name();
83 // print in a single call to reduce interleaving between threads
84 if (source_file != NULL) {
85 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
86 } else {
87 log_debug(class, resolve)("%s %s (reflection)", from, to);
88 }
89 }
90 }
91
92
93 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
94 if (type == T_VOID) {
95 return NULL;
96 }
97 if (type == T_OBJECT || type == T_ARRAY || type == T_VALUETYPE) {
98 // regular objects are not boxed
99 return (oop) value->l;
100 }
101 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
102 if (result == NULL) {
103 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
104 }
105 return result;
106 }
107
108
109 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
110 if (box == NULL) {
111 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
112 }
113 return java_lang_boxing_object::get_value(box, value);
114 }
115
116 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
117 // Note: box is really the unboxed oop. It might even be a Short, etc.!
118 value->l = (jobject) box;
119 return T_OBJECT;
120 }
121
122
123 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
124 assert(wide_type != current_type, "widen should not be called with identical types");
125 switch (wide_type) {
126 case T_BOOLEAN:
127 case T_BYTE:
128 case T_CHAR:
129 break; // fail
130 case T_SHORT:
131 switch (current_type) {
132 case T_BYTE:
133 value->s = (jshort) value->b;
134 return;
135 default:
136 break;
137 }
138 break; // fail
139 case T_INT:
140 switch (current_type) {
141 case T_BYTE:
142 value->i = (jint) value->b;
143 return;
144 case T_CHAR:
145 value->i = (jint) value->c;
146 return;
147 case T_SHORT:
148 value->i = (jint) value->s;
149 return;
150 default:
151 break;
152 }
153 break; // fail
154 case T_LONG:
155 switch (current_type) {
156 case T_BYTE:
157 value->j = (jlong) value->b;
158 return;
159 case T_CHAR:
160 value->j = (jlong) value->c;
161 return;
162 case T_SHORT:
163 value->j = (jlong) value->s;
164 return;
165 case T_INT:
166 value->j = (jlong) value->i;
167 return;
168 default:
169 break;
170 }
171 break; // fail
172 case T_FLOAT:
173 switch (current_type) {
174 case T_BYTE:
175 value->f = (jfloat) value->b;
176 return;
177 case T_CHAR:
178 value->f = (jfloat) value->c;
179 return;
180 case T_SHORT:
181 value->f = (jfloat) value->s;
182 return;
183 case T_INT:
184 value->f = (jfloat) value->i;
185 return;
186 case T_LONG:
187 value->f = (jfloat) value->j;
188 return;
189 default:
190 break;
191 }
192 break; // fail
193 case T_DOUBLE:
194 switch (current_type) {
195 case T_BYTE:
196 value->d = (jdouble) value->b;
197 return;
198 case T_CHAR:
199 value->d = (jdouble) value->c;
200 return;
201 case T_SHORT:
202 value->d = (jdouble) value->s;
203 return;
204 case T_INT:
205 value->d = (jdouble) value->i;
206 return;
207 case T_FLOAT:
208 value->d = (jdouble) value->f;
209 return;
210 case T_LONG:
211 value->d = (jdouble) value->j;
212 return;
213 default:
214 break;
215 }
216 break; // fail
217 default:
218 break; // fail
219 }
220 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
221 }
222
223
224 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
225 if (!a->is_within_bounds(index)) {
226 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
227 }
228 if (a->is_objArray()) {
229 value->l = (jobject) objArrayOop(a)->obj_at(index);
230 return T_OBJECT;
231 } else {
232 assert(a->is_typeArray(), "just checking");
233 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
234 switch (type) {
235 case T_BOOLEAN:
236 value->z = typeArrayOop(a)->bool_at(index);
237 break;
238 case T_CHAR:
239 value->c = typeArrayOop(a)->char_at(index);
240 break;
241 case T_FLOAT:
242 value->f = typeArrayOop(a)->float_at(index);
243 break;
244 case T_DOUBLE:
245 value->d = typeArrayOop(a)->double_at(index);
246 break;
247 case T_BYTE:
248 value->b = typeArrayOop(a)->byte_at(index);
249 break;
250 case T_SHORT:
251 value->s = typeArrayOop(a)->short_at(index);
252 break;
253 case T_INT:
254 value->i = typeArrayOop(a)->int_at(index);
255 break;
256 case T_LONG:
257 value->j = typeArrayOop(a)->long_at(index);
258 break;
259 default:
260 return T_ILLEGAL;
261 }
262 return type;
263 }
264 }
265
266
267 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
268 if (!a->is_within_bounds(index)) {
269 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
270 }
271 if (a->is_objArray()) {
272 if (value_type == T_OBJECT) {
273 oop obj = (oop) value->l;
274 if (obj != NULL) {
275 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
276 if (!obj->is_a(element_klass)) {
277 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
278 }
279 }
280 objArrayOop(a)->obj_at_put(index, obj);
281 }
282 } else {
283 assert(a->is_typeArray(), "just checking");
284 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
285 if (array_type != value_type) {
286 // The widen operation can potentially throw an exception, but cannot block,
287 // so typeArrayOop a is safe if the call succeeds.
288 widen(value, value_type, array_type, CHECK);
289 }
290 switch (array_type) {
291 case T_BOOLEAN:
292 typeArrayOop(a)->bool_at_put(index, value->z);
293 break;
294 case T_CHAR:
295 typeArrayOop(a)->char_at_put(index, value->c);
296 break;
297 case T_FLOAT:
298 typeArrayOop(a)->float_at_put(index, value->f);
299 break;
300 case T_DOUBLE:
301 typeArrayOop(a)->double_at_put(index, value->d);
302 break;
303 case T_BYTE:
304 typeArrayOop(a)->byte_at_put(index, value->b);
305 break;
306 case T_SHORT:
307 typeArrayOop(a)->short_at_put(index, value->s);
308 break;
309 case T_INT:
310 typeArrayOop(a)->int_at_put(index, value->i);
311 break;
312 case T_LONG:
313 typeArrayOop(a)->long_at_put(index, value->j);
314 break;
315 default:
316 THROW(vmSymbols::java_lang_IllegalArgumentException());
317 }
318 }
319 }
320
321 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
322 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
323 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
324 if (type == T_VOID) {
325 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
326 }
327 else {
328 return Universe::typeArrayKlassObj(type);
329 }
330 }
331
332 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
333 if (element_mirror == NULL) {
334 THROW_0(vmSymbols::java_lang_NullPointerException());
335 }
336 if (length < 0) {
337 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
338 }
339 if (java_lang_Class::is_primitive(element_mirror)) {
340 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
341 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
342 } else {
343 Klass* k = java_lang_Class::as_Klass(element_mirror);
344 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
345 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
346 }
347 return oopFactory::new_array(k, length, THREAD);
348 }
349 }
350
351
352 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
353 assert(dim_array->is_typeArray(), "just checking");
354 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
355
356 if (element_mirror == NULL) {
357 THROW_0(vmSymbols::java_lang_NullPointerException());
358 }
359
360 int len = dim_array->length();
361 if (len <= 0 || len > MAX_DIM) {
362 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
363 }
364
365 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
366 for (int i = 0; i < len; i++) {
367 int d = dim_array->int_at(i);
368 if (d < 0) {
369 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
370 }
371 dimensions[i] = d;
372 }
373
374 Klass* klass;
375 int dim = len;
376 if (java_lang_Class::is_primitive(element_mirror)) {
377 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
378 } else {
379 klass = java_lang_Class::as_Klass(element_mirror);
380 if (klass->is_array_klass()) {
381 int k_dim = ArrayKlass::cast(klass)->dimension();
382 if (k_dim + len > MAX_DIM) {
383 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
384 }
385 dim += k_dim;
386 }
387 }
388 klass = klass->array_klass(dim, CHECK_NULL);
389 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
390 assert(obj->is_array(), "just checking");
391 return arrayOop(obj);
392 }
393
394
395 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
396 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
397 for (;;) {
398 const InstanceKlass* hc = ik->unsafe_anonymous_host();
399 if (hc == NULL) return false;
400 if (hc == unsafe_anonymous_host) return true;
401 ik = hc;
402
403 // There's no way to make a host class loop short of patching memory.
404 // Therefore there cannot be a loop here unless there's another bug.
405 // Still, let's check for it.
406 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop");
407 }
408 }
409
410 static bool can_relax_access_check_for(const Klass* accessor,
411 const Klass* accessee,
412 bool classloader_only) {
413
414 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
415 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
416
417 // If either is on the other's unsafe_anonymous_host chain, access is OK,
418 // because one is inside the other.
419 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) ||
420 under_unsafe_anonymous_host(accessee_ik, accessor_ik))
421 return true;
422
423 if (RelaxAccessControlCheck &&
424 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
425 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) {
426 return classloader_only &&
427 Verifier::relax_access_for(accessor_ik->class_loader()) &&
428 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
429 accessor_ik->class_loader() == accessee_ik->class_loader();
430 }
431
432 return false;
433 }
434
435 /*
436 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
437
438 Callee T in Callee T in package PT,
439 unnamed module runtime module MT
440 ------------------------------------------------------------------------------------------------
441
442 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
443 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
444 unnamed module: YES
445 Else if (MS can read MT (establish readability) &&
446 ((MT exports PT to MS or to all modules) ||
447 (MT is open))): YES
448
449 ------------------------------------------------------------------------------------------------
450 Caller S in unnamed YES Readability exists because unnamed module
451 module UM "reads" all modules
452 if (MT exports PT to UM or to all modules): YES
453
454 ------------------------------------------------------------------------------------------------
455
456 Note: a loose module is a module that can read all current and future unnamed modules.
457 */
458 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
459 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
460
461 // Verify that current_class can access new_class. If the classloader_only
462 // flag is set, we automatically allow any accesses in which current_class
463 // doesn't have a classloader.
464 if ((current_class == NULL) ||
465 (current_class == new_class) ||
466 is_same_class_package(current_class, new_class)) {
467 return ACCESS_OK;
468 }
469 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
470 // succeed trivially.
471 if (SystemDictionary::reflect_MagicAccessorImpl_klass_is_loaded() &&
472 current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
473 return ACCESS_OK;
474 }
475
476 // module boundaries
477 if (new_class->is_public()) {
478 // Ignore modules for DumpSharedSpaces because we do not have any package
479 // or module information for modules other than java.base.
480 if (DumpSharedSpaces) {
481 return ACCESS_OK;
482 }
483
484 // Find the module entry for current_class, the accessor
485 ModuleEntry* module_from = current_class->module();
486 // Find the module entry for new_class, the accessee
487 ModuleEntry* module_to = new_class->module();
488
489 // both in same (possibly unnamed) module
490 if (module_from == module_to) {
491 return ACCESS_OK;
492 }
493
494 // Acceptable access to a type in an unnamed module. Note that since
495 // unnamed modules can read all unnamed modules, this also handles the
496 // case where module_from is also unnamed but in a different class loader.
497 if (!module_to->is_named() &&
498 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
499 return ACCESS_OK;
500 }
501
502 // Establish readability, check if module_from is allowed to read module_to.
503 if (!module_from->can_read(module_to)) {
504 return MODULE_NOT_READABLE;
505 }
506
507 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
508 if (module_to->is_open()) {
509 return ACCESS_OK;
510 }
511
512 PackageEntry* package_to = new_class->package();
513 assert(package_to != NULL, "can not obtain new_class' package");
514
515 {
516 MutexLocker m1(Module_lock);
517
518 // Once readability is established, if module_to exports T unqualifiedly,
519 // (to all modules), than whether module_from is in the unnamed module
520 // or not does not matter, access is allowed.
521 if (package_to->is_unqual_exported()) {
522 return ACCESS_OK;
523 }
524
525 // Access is allowed if both 1 & 2 hold:
526 // 1. Readability, module_from can read module_to (established above).
527 // 2. Either module_to exports T to module_from qualifiedly.
528 // or
529 // module_to exports T to all unnamed modules and module_from is unnamed.
530 // or
531 // module_to exports T unqualifiedly to all modules (checked above).
532 if (!package_to->is_qexported_to(module_from)) {
533 return TYPE_NOT_EXPORTED;
534 }
535 }
536 return ACCESS_OK;
537 }
538
539 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
540 return ACCESS_OK;
541 }
542 return OTHER_PROBLEM;
543 }
544
545 // Return an error message specific to the specified Klass*'s and result.
546 // This function must be called from within a block containing a ResourceMark.
547 char* Reflection::verify_class_access_msg(const Klass* current_class,
548 const InstanceKlass* new_class,
549 const VerifyClassAccessResults result) {
550 assert(result != ACCESS_OK, "must be failure result");
551 char * msg = NULL;
552 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) {
553 // Find the module entry for current_class, the accessor
554 ModuleEntry* module_from = current_class->module();
555 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
556 const char * current_class_name = current_class->external_name();
557
558 // Find the module entry for new_class, the accessee
559 ModuleEntry* module_to = NULL;
560 module_to = new_class->module();
561 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
562 const char * new_class_name = new_class->external_name();
563
564 if (result == MODULE_NOT_READABLE) {
565 assert(module_from->is_named(), "Unnamed modules can read all modules");
566 if (module_to->is_named()) {
567 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
568 strlen(new_class_name) + 2*strlen(module_to_name);
569 msg = NEW_RESOURCE_ARRAY(char, len);
570 jio_snprintf(msg, len - 1,
571 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
572 current_class_name, module_from_name, new_class_name,
573 module_to_name, module_from_name, module_to_name);
574 } else {
575 oop jlm = module_to->module();
576 assert(jlm != NULL, "Null jlm in module_to ModuleEntry");
577 intptr_t identity_hash = jlm->identity_hash();
578 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
579 strlen(new_class_name) + 2*sizeof(uintx);
580 msg = NEW_RESOURCE_ARRAY(char, len);
581 jio_snprintf(msg, len - 1,
582 "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,
583 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
584 module_from_name, uintx(identity_hash));
585 }
586
587 } else if (result == TYPE_NOT_EXPORTED) {
588 assert(new_class->package() != NULL,
589 "Unnamed packages are always exported");
590 const char * package_name =
591 new_class->package()->name()->as_klass_external_name();
592 assert(module_to->is_named(), "Unnamed modules export all packages");
593 if (module_from->is_named()) {
594 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
595 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
596 msg = NEW_RESOURCE_ARRAY(char, len);
597 jio_snprintf(msg, len - 1,
598 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
599 current_class_name, module_from_name, new_class_name,
600 module_to_name, module_to_name, package_name, module_from_name);
601 } else {
602 oop jlm = module_from->module();
603 assert(jlm != NULL, "Null jlm in module_from ModuleEntry");
604 intptr_t identity_hash = jlm->identity_hash();
605 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
606 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
607 msg = NEW_RESOURCE_ARRAY(char, len);
608 jio_snprintf(msg, len - 1,
609 "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,
610 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
611 module_to_name, package_name, uintx(identity_hash));
612 }
613 } else {
614 ShouldNotReachHere();
615 }
616 } // result != OTHER_PROBLEM...
617 return msg;
618 }
619
620 bool Reflection::verify_member_access(const Klass* current_class,
621 const Klass* resolved_class,
622 const Klass* member_class,
623 AccessFlags access,
624 bool classloader_only,
625 bool protected_restriction,
626 TRAPS) {
627 // Verify that current_class can access a member of member_class, where that
628 // field's access bits are "access". We assume that we've already verified
629 // that current_class can access member_class.
630 //
631 // If the classloader_only flag is set, we automatically allow any accesses
632 // in which current_class doesn't have a classloader.
633 //
634 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
635 // need this distinction (e.g. if all we have is the runtime type, or during
636 // class file parsing when we only care about the static type); in that case
637 // callers should ensure that resolved_class == member_class.
638 //
639 if ((current_class == NULL) ||
640 (current_class == member_class) ||
641 access.is_public()) {
642 return true;
643 }
644
645 const Klass* host_class = current_class;
646 if (current_class->is_instance_klass() &&
647 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) {
648 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host();
649 assert(host_class != NULL, "Unsafe anonymous class has null host class");
650 assert(!(host_class->is_instance_klass() &&
651 InstanceKlass::cast(host_class)->is_unsafe_anonymous()),
652 "unsafe_anonymous_host should not be unsafe anonymous itself");
653 }
654 if (host_class == member_class) {
655 return true;
656 }
657
658 if (access.is_protected()) {
659 if (!protected_restriction) {
660 // See if current_class (or outermost host class) is a subclass of member_class
661 // An interface may not access protected members of j.l.Object
662 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) {
663 if (access.is_static() || // static fields are ok, see 6622385
664 current_class == resolved_class ||
665 member_class == resolved_class ||
666 host_class->is_subclass_of(resolved_class) ||
667 resolved_class->is_subclass_of(host_class)) {
668 return true;
669 }
670 }
671 }
672 }
673
674 // package access
675 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
676 return true;
677 }
678
679 // private access between different classes needs a nestmate check, but
680 // not for unsafe anonymous classes - so check host_class
681 if (access.is_private() && host_class == current_class) {
682 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
683 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
684 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
685 // Nestmate access checks may require resolution and validation of the nest-host.
686 // It is up to the caller to check for pending exceptions and handle appropriately.
687 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
688 if (access) {
689 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
690 return true;
691 }
692 }
693 }
694
695 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
696 // succeed trivially.
697 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
698 return true;
699 }
700
701 // Check for special relaxations
702 return can_relax_access_check_for(current_class, member_class, classloader_only);
703 }
704
705 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
706 return InstanceKlass::cast(class1)->is_same_class_package(class2);
707 }
708
709 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
710 // throw an incompatible class change exception
711 // If inner_is_member, require the inner to be a member of the outer.
712 // If !inner_is_member, require the inner to be unsafe anonymous (a non-member).
713 // Caller is responsible for figuring out in advance which case must be true.
714 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
715 bool inner_is_member, TRAPS) {
716 InnerClassesIterator iter(outer);
717 constantPoolHandle cp (THREAD, outer->constants());
718 for (; !iter.done(); iter.next()) {
719 int ioff = iter.inner_class_info_index();
720 int ooff = iter.outer_class_info_index();
721
722 if (inner_is_member && ioff != 0 && ooff != 0) {
723 if (cp->klass_name_at_matches(outer, ooff) &&
724 cp->klass_name_at_matches(inner, ioff)) {
725 Klass* o = cp->klass_at(ooff, CHECK);
726 if (o == outer) {
727 Klass* i = cp->klass_at(ioff, CHECK);
728 if (i == inner) {
729 return;
730 }
731 }
732 }
733 }
734
735 if (!inner_is_member && ioff != 0 && ooff == 0 &&
736 cp->klass_name_at_matches(inner, ioff)) {
737 Klass* i = cp->klass_at(ioff, CHECK);
738 if (i == inner) {
739 return;
740 }
741 }
742 }
743
744 // 'inner' not declared as an inner klass in outer
745 ResourceMark rm(THREAD);
746 Exceptions::fthrow(
747 THREAD_AND_LOCATION,
748 vmSymbols::java_lang_IncompatibleClassChangeError(),
749 "%s and %s disagree on InnerClasses attribute",
750 outer->external_name(),
751 inner->external_name()
752 );
753 }
754
755 // Returns Q-mirror if qtype_if_value is true and k is a ValueKlass;
756 // otherwise returns java_mirror or L-mirror for ValueKlass
757 static oop java_mirror(Klass* k, jboolean qtype_if_value) {
758 if (qtype_if_value && k->is_value()) {
759 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(k));
760 return vk->value_mirror();
761 } else {
762 return k->java_mirror();
763 }
764 }
765
766 // Utility method converting a single SignatureStream element into java.lang.Class instance
767 static oop get_mirror_from_signature(const methodHandle& method,
768 SignatureStream* ss,
769 TRAPS) {
770
771 BasicType bt = ss->type();
772 if (T_OBJECT == bt || T_ARRAY == bt || T_VALUETYPE == bt) {
773 Symbol* name = ss->as_symbol(CHECK_NULL);
774 oop loader = method->method_holder()->class_loader();
775 oop protection_domain = method->method_holder()->protection_domain();
776 const Klass* k = SystemDictionary::resolve_or_fail(name,
777 Handle(THREAD, loader),
778 Handle(THREAD, protection_domain),
779 true,
780 CHECK_NULL);
781 if (log_is_enabled(Debug, class, resolve)) {
782 trace_class_resolution(k);
783 }
784 return java_mirror((Klass*)k, bt == T_VALUETYPE);
785 }
786
787 assert(bt != T_VOID || ss->at_return_type(),
788 "T_VOID should only appear as return type");
789
790 return java_lang_Class::primitive_mirror(bt);
791 }
792
793 static objArrayHandle get_parameter_types(const methodHandle& method,
794 int parameter_count,
795 oop* return_type,
796 TRAPS) {
797 // Allocate array holding parameter types (java.lang.Class instances)
798 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
799 objArrayHandle mirrors(THREAD, m);
800 int index = 0;
801 // Collect parameter types
802 ResourceMark rm(THREAD);
803 Symbol* signature = method->signature();
804 SignatureStream ss(signature);
805 while (!ss.at_return_type()) {
806 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
807 mirrors->obj_at_put(index++, mirror);
808 ss.next();
809 }
810 assert(index == parameter_count, "invalid parameter count");
811 if (return_type != NULL) {
812 // Collect return type as well
813 assert(ss.at_return_type(), "return type should be present");
814 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
815 }
816 return mirrors;
817 }
818
819 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
820 return method->resolved_checked_exceptions(THREAD);
821 }
822
823 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
824 // Basic types
825 BasicType type = vmSymbols::signature_type(signature);
826 if (type != T_OBJECT && type != T_VALUETYPE) {
827 return Handle(THREAD, Universe::java_mirror(type));
828 }
829
830 Klass* result =
831 SystemDictionary::resolve_or_fail(signature,
832 Handle(THREAD, k->class_loader()),
833 Handle(THREAD, k->protection_domain()),
834 true, CHECK_(Handle()));
835
836 if (log_is_enabled(Debug, class, resolve)) {
837 trace_class_resolution(result);
838 }
839 oop nt = java_mirror(result, type == T_VALUETYPE);
840 return Handle(THREAD, nt);
841 }
842
843
844 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
845 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
846 assert(!method()->is_initializer() ||
847 (for_constant_pool_access && method()->is_static()),
848 "should call new_constructor instead");
849 InstanceKlass* holder = method->method_holder();
850 int slot = method->method_idnum();
851
852 Symbol* signature = method->signature();
853 int parameter_count = ArgumentCount(signature).size();
854 oop return_type_oop = NULL;
855 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
856 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
857
858 Handle return_type(THREAD, return_type_oop);
859
860 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
861
862 if (exception_types.is_null()) return NULL;
863
864 Symbol* method_name = method->name();
865 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
866 Handle name = Handle(THREAD, name_oop);
867 if (name == NULL) return NULL;
868
869 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
870
871 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
872
873 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
874 java_lang_reflect_Method::set_slot(mh(), slot);
875 java_lang_reflect_Method::set_name(mh(), name());
876 java_lang_reflect_Method::set_return_type(mh(), return_type());
877 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
878 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
879 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
880 java_lang_reflect_Method::set_override(mh(), false);
881 if (method->generic_signature() != NULL) {
882 Symbol* gs = method->generic_signature();
883 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
884 java_lang_reflect_Method::set_signature(mh(), sig());
885 }
886 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
887 java_lang_reflect_Method::set_annotations(mh(), an_oop);
888 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
889 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
890 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
891 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
892 return mh();
893 }
894
895
896 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
897 assert(method()->is_initializer(), "should call new_method instead");
898
899 InstanceKlass* holder = method->method_holder();
900 int slot = method->method_idnum();
901
902 Symbol* signature = method->signature();
903 int parameter_count = ArgumentCount(signature).size();
904 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
905 if (parameter_types.is_null()) return NULL;
906
907 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
908 if (exception_types.is_null()) return NULL;
909
910 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
911
912 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
913
914 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
915 java_lang_reflect_Constructor::set_slot(ch(), slot);
916 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
917 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
918 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
919 java_lang_reflect_Constructor::set_override(ch(), false);
920 if (method->generic_signature() != NULL) {
921 Symbol* gs = method->generic_signature();
922 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
923 java_lang_reflect_Constructor::set_signature(ch(), sig());
924 }
925 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
926 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
927 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
928 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
929 return ch();
930 }
931
932
933 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
934 Symbol* field_name = fd->name();
935 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
936 Handle name = Handle(THREAD, name_oop);
937 Symbol* signature = fd->signature();
938 InstanceKlass* holder = fd->field_holder();
939 Handle type = new_type(signature, holder, CHECK_NULL);
940 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
941
942 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
943 java_lang_reflect_Field::set_slot(rh(), fd->index());
944 java_lang_reflect_Field::set_name(rh(), name());
945 java_lang_reflect_Field::set_type(rh(), type());
946 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
947 int modifiers = fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS;
948 if (fd->is_flattenable()) {
949 modifiers |= JVM_ACC_FLATTENABLE;
950 }
951 if (fd->is_flattened()) {
952 modifiers |= JVM_ACC_FIELD_FLATTENED;
953 }
954 java_lang_reflect_Field::set_modifiers(rh(), modifiers);
955 java_lang_reflect_Field::set_override(rh(), false);
956 if (fd->has_generic_signature()) {
957 Symbol* gs = fd->generic_signature();
958 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
959 java_lang_reflect_Field::set_signature(rh(), sig());
960 }
961 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
962 java_lang_reflect_Field::set_annotations(rh(), an_oop);
963 return rh();
964 }
965
966 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
967 int flags, TRAPS) {
968
969 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
970
971 if(NULL != sym) {
972 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
973 java_lang_reflect_Parameter::set_name(rh(), name());
974 } else {
975 java_lang_reflect_Parameter::set_name(rh(), NULL);
976 }
977
978 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
979 java_lang_reflect_Parameter::set_executable(rh(), method());
980 java_lang_reflect_Parameter::set_index(rh(), index);
981 return rh();
982 }
983
984
985 static methodHandle resolve_interface_call(InstanceKlass* klass,
986 const methodHandle& method,
987 Klass* recv_klass,
988 Handle receiver,
989 TRAPS) {
990
991 assert(!method.is_null() , "method should not be null");
992
993 CallInfo info;
994 Symbol* signature = method->signature();
995 Symbol* name = method->name();
996 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
997 LinkInfo(klass, name, signature),
998 true,
999 CHECK_(methodHandle()));
1000 return info.selected_method();
1001 }
1002
1003 // Conversion
1004 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1005 assert(java_lang_Class::is_primitive(basic_type_mirror),
1006 "just checking");
1007 return java_lang_Class::primitive_type(basic_type_mirror);
1008 }
1009
1010 // Narrowing of basic types. Used to create correct jvalues for
1011 // boolean, byte, char and short return return values from interpreter
1012 // which are returned as ints. Throws IllegalArgumentException.
1013 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1014 switch (narrow_type) {
1015 case T_BOOLEAN:
1016 value->z = (jboolean) (value->i & 1);
1017 return;
1018 case T_BYTE:
1019 value->b = (jbyte)value->i;
1020 return;
1021 case T_CHAR:
1022 value->c = (jchar)value->i;
1023 return;
1024 case T_SHORT:
1025 value->s = (jshort)value->i;
1026 return;
1027 default:
1028 break; // fail
1029 }
1030 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1031 }
1032
1033
1034 // Method call (shared by invoke_method and invoke_constructor)
1035 static oop invoke(InstanceKlass* klass,
1036 const methodHandle& reflected_method,
1037 Handle receiver,
1038 bool override,
1039 objArrayHandle ptypes,
1040 BasicType rtype,
1041 objArrayHandle args,
1042 bool is_method_invoke,
1043 TRAPS) {
1044
1045 ResourceMark rm(THREAD);
1046
1047 methodHandle method; // actual method to invoke
1048 Klass* target_klass; // target klass, receiver's klass for non-static
1049
1050 // Ensure klass is initialized
1051 klass->initialize(CHECK_NULL);
1052
1053 bool is_static = reflected_method->is_static();
1054 if (is_static) {
1055 // ignore receiver argument
1056 method = reflected_method;
1057 target_klass = klass;
1058 } else {
1059 // check for null receiver
1060 if (receiver.is_null()) {
1061 THROW_0(vmSymbols::java_lang_NullPointerException());
1062 }
1063 // Check class of receiver against class declaring method
1064 if (!receiver->is_a(klass)) {
1065 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1066 }
1067 // target klass is receiver's klass
1068 target_klass = receiver->klass();
1069 // no need to resolve if method is private or <init>
1070 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
1071 method = reflected_method;
1072 } else {
1073 // resolve based on the receiver
1074 if (reflected_method->method_holder()->is_interface()) {
1075 // resolve interface call
1076 //
1077 // Match resolution errors with those thrown due to reflection inlining
1078 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1079 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1080 if (HAS_PENDING_EXCEPTION) {
1081 // Method resolution threw an exception; wrap it in an InvocationTargetException
1082 oop resolution_exception = PENDING_EXCEPTION;
1083 CLEAR_PENDING_EXCEPTION;
1084 // JVMTI has already reported the pending exception
1085 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1086 if (THREAD->is_Java_thread()) {
1087 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1088 }
1089 JavaCallArguments args(Handle(THREAD, resolution_exception));
1090 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1091 vmSymbols::throwable_void_signature(),
1092 &args);
1093 }
1094 } else {
1095 // if the method can be overridden, we resolve using the vtable index.
1096 assert(!reflected_method->has_itable_index(), "");
1097 int index = reflected_method->vtable_index();
1098 method = reflected_method;
1099 if (index != Method::nonvirtual_vtable_index) {
1100 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1101 }
1102 if (!method.is_null()) {
1103 // Check for abstract methods as well
1104 if (method->is_abstract()) {
1105 // new default: 6531596
1106 ResourceMark rm(THREAD);
1107 stringStream ss;
1108 ss.print("'");
1109 Method::print_external_name(&ss, target_klass, method->name(), method->signature());
1110 ss.print("'");
1111 Handle h_origexception = Exceptions::new_exception(THREAD,
1112 vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1113 JavaCallArguments args(h_origexception);
1114 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1115 vmSymbols::throwable_void_signature(),
1116 &args);
1117 }
1118 }
1119 }
1120 }
1121 }
1122
1123 // I believe this is a ShouldNotGetHere case which requires
1124 // an internal vtable bug. If you ever get this please let Karen know.
1125 if (method.is_null()) {
1126 ResourceMark rm(THREAD);
1127 stringStream ss;
1128 ss.print("'");
1129 Method::print_external_name(&ss, klass,
1130 reflected_method->name(),
1131 reflected_method->signature());
1132 ss.print("'");
1133 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
1134 }
1135
1136 assert(ptypes->is_objArray(), "just checking");
1137 int args_len = args.is_null() ? 0 : args->length();
1138 // Check number of arguments
1139 if (ptypes->length() != args_len) {
1140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1141 "wrong number of arguments");
1142 }
1143
1144 // Create object to contain parameters for the JavaCall
1145 JavaCallArguments java_args(method->size_of_parameters());
1146
1147 if (!is_static) {
1148 java_args.push_oop(receiver);
1149 }
1150
1151 for (int i = 0; i < args_len; i++) {
1152 oop type_mirror = ptypes->obj_at(i);
1153 oop arg = args->obj_at(i);
1154 if (java_lang_Class::is_primitive(type_mirror)) {
1155 jvalue value;
1156 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1157 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1158 if (ptype != atype) {
1159 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1160 }
1161 switch (ptype) {
1162 case T_BOOLEAN: java_args.push_int(value.z); break;
1163 case T_CHAR: java_args.push_int(value.c); break;
1164 case T_BYTE: java_args.push_int(value.b); break;
1165 case T_SHORT: java_args.push_int(value.s); break;
1166 case T_INT: java_args.push_int(value.i); break;
1167 case T_LONG: java_args.push_long(value.j); break;
1168 case T_FLOAT: java_args.push_float(value.f); break;
1169 case T_DOUBLE: java_args.push_double(value.d); break;
1170 default:
1171 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1172 }
1173 } else {
1174 if (arg != NULL) {
1175 Klass* k = java_lang_Class::as_Klass(type_mirror);
1176 if (!arg->is_a(k)) {
1177 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1178 "argument type mismatch");
1179 }
1180 }
1181 Handle arg_handle(THREAD, arg); // Create handle for argument
1182 java_args.push_oop(arg_handle); // Push handle
1183 }
1184 }
1185
1186 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1187 "just checking");
1188
1189 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1190 // oop (i.e., NOT as an handle)
1191 JavaValue result(rtype);
1192 JavaCalls::call(&result, method, &java_args, THREAD);
1193
1194 if (HAS_PENDING_EXCEPTION) {
1195 // Method threw an exception; wrap it in an InvocationTargetException
1196 oop target_exception = PENDING_EXCEPTION;
1197 CLEAR_PENDING_EXCEPTION;
1198 // JVMTI has already reported the pending exception
1199 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1200 if (THREAD->is_Java_thread()) {
1201 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1202 }
1203
1204 JavaCallArguments args(Handle(THREAD, target_exception));
1205 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1206 vmSymbols::throwable_void_signature(),
1207 &args);
1208 } else {
1209 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1210 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1211 }
1212 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1213 }
1214 }
1215
1216 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1217 // of java.lang.reflect.Constructor
1218
1219 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1220 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1221 int slot = java_lang_reflect_Method::slot(method_mirror);
1222 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1223 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1224
1225 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1226 BasicType rtype;
1227 if (java_lang_Class::is_primitive(return_type_mirror)) {
1228 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1229 } else if (java_lang_Class::value_mirror(return_type_mirror) == return_type_mirror) {
1230 rtype = T_VALUETYPE;
1231 } else {
1232 rtype = T_OBJECT;
1233 }
1234
1235 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1236 Method* m = klass->method_with_idnum(slot);
1237 if (m == NULL) {
1238 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1239 }
1240 methodHandle method(THREAD, m);
1241
1242 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1243 }
1244
1245
1246 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1247 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1248 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1249 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1250 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1251
1252 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1253 Method* m = klass->method_with_idnum(slot);
1254 if (m == NULL) {
1255 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1256 }
1257 methodHandle method(THREAD, m);
1258 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1259
1260 // Make sure klass gets initialize
1261 klass->initialize(CHECK_NULL);
1262
1263 // Create new instance (the receiver)
1264 klass->check_valid_for_instantiation(false, CHECK_NULL);
1265 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1266
1267 // Ignore result from call and return receiver
1268 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1269 return receiver();
1270 }