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/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 if (java_lang_Class::is_nullable_type(element_mirror)) {
348 return oopFactory::new_objArray(k, length, THREAD);
349 } else {
350 return oopFactory::new_valueArray(k, length, THREAD);
351 }
352 }
353 }
354
355
356 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
357 assert(dim_array->is_typeArray(), "just checking");
358 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
359
360 if (element_mirror == NULL) {
361 THROW_0(vmSymbols::java_lang_NullPointerException());
362 }
363
364 int len = dim_array->length();
365 if (len <= 0 || len > MAX_DIM) {
366 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
367 }
368
369 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
370 for (int i = 0; i < len; i++) {
371 int d = dim_array->int_at(i);
372 if (d < 0) {
373 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
374 }
375 dimensions[i] = d;
376 }
377
378 Klass* klass;
379 int dim = len;
380 if (java_lang_Class::is_primitive(element_mirror)) {
381 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
382 } else {
383 klass = java_lang_Class::as_Klass(element_mirror);
384 if (klass->is_array_klass()) {
385 int k_dim = ArrayKlass::cast(klass)->dimension();
386 if (k_dim + len > MAX_DIM) {
387 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
388 }
389 dim += k_dim;
390 }
391 }
392 ArrayStorageProperties storage_props = FieldType::get_array_storage_properties(klass->name());
393 klass = klass->array_klass(storage_props, dim, CHECK_NULL);
394 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
395 assert(obj->is_array(), "just checking");
396 return arrayOop(obj);
397 }
398
399
400 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
401 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
402 for (;;) {
403 const InstanceKlass* hc = ik->unsafe_anonymous_host();
404 if (hc == NULL) return false;
405 if (hc == unsafe_anonymous_host) return true;
406 ik = hc;
407
408 // There's no way to make a host class loop short of patching memory.
409 // Therefore there cannot be a loop here unless there's another bug.
410 // Still, let's check for it.
411 assert(--inf_loop_check > 0, "no unsafe_anonymous_host loop");
412 }
413 }
414
415 static bool can_relax_access_check_for(const Klass* accessor,
416 const Klass* accessee,
417 bool classloader_only) {
418
419 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
420 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
421
422 // If either is on the other's unsafe_anonymous_host chain, access is OK,
423 // because one is inside the other.
424 if (under_unsafe_anonymous_host(accessor_ik, accessee_ik) ||
425 under_unsafe_anonymous_host(accessee_ik, accessor_ik))
426 return true;
427
428 if (RelaxAccessControlCheck &&
429 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
430 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) {
431 return classloader_only &&
432 Verifier::relax_access_for(accessor_ik->class_loader()) &&
433 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
434 accessor_ik->class_loader() == accessee_ik->class_loader();
435 }
436
437 return false;
438 }
439
440 /*
441 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
442
443 Callee T in Callee T in package PT,
444 unnamed module runtime module MT
445 ------------------------------------------------------------------------------------------------
446
447 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
448 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
449 unnamed module: YES
450 Else if (MS can read MT (establish readability) &&
451 ((MT exports PT to MS or to all modules) ||
452 (MT is open))): YES
453
454 ------------------------------------------------------------------------------------------------
455 Caller S in unnamed YES Readability exists because unnamed module
456 module UM "reads" all modules
457 if (MT exports PT to UM or to all modules): YES
458
459 ------------------------------------------------------------------------------------------------
460
461 Note: a loose module is a module that can read all current and future unnamed modules.
462 */
463 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
464 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
465
466 // Verify that current_class can access new_class. If the classloader_only
467 // flag is set, we automatically allow any accesses in which current_class
468 // doesn't have a classloader.
469 if ((current_class == NULL) ||
470 (current_class == new_class) ||
471 is_same_class_package(current_class, new_class)) {
472 return ACCESS_OK;
473 }
474 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
475 // succeed trivially.
476 if (SystemDictionary::reflect_MagicAccessorImpl_klass_is_loaded() &&
477 current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
478 return ACCESS_OK;
479 }
480
481 // module boundaries
482 if (new_class->is_public()) {
483 // Ignore modules for DumpSharedSpaces because we do not have any package
484 // or module information for modules other than java.base.
485 if (DumpSharedSpaces) {
486 return ACCESS_OK;
487 }
488
489 // Find the module entry for current_class, the accessor
490 ModuleEntry* module_from = current_class->module();
491 // Find the module entry for new_class, the accessee
492 ModuleEntry* module_to = new_class->module();
493
494 // both in same (possibly unnamed) module
495 if (module_from == module_to) {
496 return ACCESS_OK;
497 }
498
499 // Acceptable access to a type in an unnamed module. Note that since
500 // unnamed modules can read all unnamed modules, this also handles the
501 // case where module_from is also unnamed but in a different class loader.
502 if (!module_to->is_named() &&
503 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
504 return ACCESS_OK;
505 }
506
507 // Establish readability, check if module_from is allowed to read module_to.
508 if (!module_from->can_read(module_to)) {
509 return MODULE_NOT_READABLE;
510 }
511
512 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
513 if (module_to->is_open()) {
514 return ACCESS_OK;
515 }
516
517 PackageEntry* package_to = new_class->package();
518 assert(package_to != NULL, "can not obtain new_class' package");
519
520 {
521 MutexLocker m1(Module_lock);
522
523 // Once readability is established, if module_to exports T unqualifiedly,
524 // (to all modules), than whether module_from is in the unnamed module
525 // or not does not matter, access is allowed.
526 if (package_to->is_unqual_exported()) {
527 return ACCESS_OK;
528 }
529
530 // Access is allowed if both 1 & 2 hold:
531 // 1. Readability, module_from can read module_to (established above).
532 // 2. Either module_to exports T to module_from qualifiedly.
533 // or
534 // module_to exports T to all unnamed modules and module_from is unnamed.
535 // or
536 // module_to exports T unqualifiedly to all modules (checked above).
537 if (!package_to->is_qexported_to(module_from)) {
538 return TYPE_NOT_EXPORTED;
539 }
540 }
541 return ACCESS_OK;
542 }
543
544 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
545 return ACCESS_OK;
546 }
547 return OTHER_PROBLEM;
548 }
549
550 // Return an error message specific to the specified Klass*'s and result.
551 // This function must be called from within a block containing a ResourceMark.
552 char* Reflection::verify_class_access_msg(const Klass* current_class,
553 const InstanceKlass* new_class,
554 const VerifyClassAccessResults result) {
555 assert(result != ACCESS_OK, "must be failure result");
556 char * msg = NULL;
557 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) {
558 // Find the module entry for current_class, the accessor
559 ModuleEntry* module_from = current_class->module();
560 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
561 const char * current_class_name = current_class->external_name();
562
563 // Find the module entry for new_class, the accessee
564 ModuleEntry* module_to = NULL;
565 module_to = new_class->module();
566 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
567 const char * new_class_name = new_class->external_name();
568
569 if (result == MODULE_NOT_READABLE) {
570 assert(module_from->is_named(), "Unnamed modules can read all modules");
571 if (module_to->is_named()) {
572 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
573 strlen(new_class_name) + 2*strlen(module_to_name);
574 msg = NEW_RESOURCE_ARRAY(char, len);
575 jio_snprintf(msg, len - 1,
576 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
577 current_class_name, module_from_name, new_class_name,
578 module_to_name, module_from_name, module_to_name);
579 } else {
580 oop jlm = module_to->module();
581 assert(jlm != NULL, "Null jlm in module_to ModuleEntry");
582 intptr_t identity_hash = jlm->identity_hash();
583 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
584 strlen(new_class_name) + 2*sizeof(uintx);
585 msg = NEW_RESOURCE_ARRAY(char, len);
586 jio_snprintf(msg, len - 1,
587 "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,
588 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
589 module_from_name, uintx(identity_hash));
590 }
591
592 } else if (result == TYPE_NOT_EXPORTED) {
593 assert(new_class->package() != NULL,
594 "Unnamed packages are always exported");
595 const char * package_name =
596 new_class->package()->name()->as_klass_external_name();
597 assert(module_to->is_named(), "Unnamed modules export all packages");
598 if (module_from->is_named()) {
599 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
600 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
601 msg = NEW_RESOURCE_ARRAY(char, len);
602 jio_snprintf(msg, len - 1,
603 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
604 current_class_name, module_from_name, new_class_name,
605 module_to_name, module_to_name, package_name, module_from_name);
606 } else {
607 oop jlm = module_from->module();
608 assert(jlm != NULL, "Null jlm in module_from ModuleEntry");
609 intptr_t identity_hash = jlm->identity_hash();
610 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
611 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
612 msg = NEW_RESOURCE_ARRAY(char, len);
613 jio_snprintf(msg, len - 1,
614 "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,
615 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
616 module_to_name, package_name, uintx(identity_hash));
617 }
618 } else {
619 ShouldNotReachHere();
620 }
621 } // result != OTHER_PROBLEM...
622 return msg;
623 }
624
625 bool Reflection::verify_member_access(const Klass* current_class,
626 const Klass* resolved_class,
627 const Klass* member_class,
628 AccessFlags access,
629 bool classloader_only,
630 bool protected_restriction,
631 TRAPS) {
632 // Verify that current_class can access a member of member_class, where that
633 // field's access bits are "access". We assume that we've already verified
634 // that current_class can access member_class.
635 //
636 // If the classloader_only flag is set, we automatically allow any accesses
637 // in which current_class doesn't have a classloader.
638 //
639 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
640 // need this distinction (e.g. if all we have is the runtime type, or during
641 // class file parsing when we only care about the static type); in that case
642 // callers should ensure that resolved_class == member_class.
643 //
644 if ((current_class == NULL) ||
645 (current_class == member_class) ||
646 access.is_public()) {
647 return true;
648 }
649
650 const Klass* host_class = current_class;
651 if (current_class->is_instance_klass() &&
652 InstanceKlass::cast(current_class)->is_unsafe_anonymous()) {
653 host_class = InstanceKlass::cast(current_class)->unsafe_anonymous_host();
654 assert(host_class != NULL, "Unsafe anonymous class has null host class");
655 assert(!(host_class->is_instance_klass() &&
656 InstanceKlass::cast(host_class)->is_unsafe_anonymous()),
657 "unsafe_anonymous_host should not be unsafe anonymous itself");
658 }
659 if (host_class == member_class) {
660 return true;
661 }
662
663 if (access.is_protected()) {
664 if (!protected_restriction) {
665 // See if current_class (or outermost host class) is a subclass of member_class
666 // An interface may not access protected members of j.l.Object
667 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) {
668 if (access.is_static() || // static fields are ok, see 6622385
669 current_class == resolved_class ||
670 member_class == resolved_class ||
671 host_class->is_subclass_of(resolved_class) ||
672 resolved_class->is_subclass_of(host_class)) {
673 return true;
674 }
675 }
676 }
677 }
678
679 // package access
680 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
681 return true;
682 }
683
684 // private access between different classes needs a nestmate check, but
685 // not for unsafe anonymous classes - so check host_class
686 if (access.is_private() && host_class == current_class) {
687 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
688 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
689 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
690 // Nestmate access checks may require resolution and validation of the nest-host.
691 // It is up to the caller to check for pending exceptions and handle appropriately.
692 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
693 if (access) {
694 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
695 return true;
696 }
697 }
698 }
699
700 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
701 // succeed trivially.
702 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
703 return true;
704 }
705
706 // Check for special relaxations
707 return can_relax_access_check_for(current_class, member_class, classloader_only);
708 }
709
710 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
711 return InstanceKlass::cast(class1)->is_same_class_package(class2);
712 }
713
714 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
715 // throw an incompatible class change exception
716 // If inner_is_member, require the inner to be a member of the outer.
717 // If !inner_is_member, require the inner to be unsafe anonymous (a non-member).
718 // Caller is responsible for figuring out in advance which case must be true.
719 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
720 bool inner_is_member, TRAPS) {
721 InnerClassesIterator iter(outer);
722 constantPoolHandle cp (THREAD, outer->constants());
723 for (; !iter.done(); iter.next()) {
724 int ioff = iter.inner_class_info_index();
725 int ooff = iter.outer_class_info_index();
726
727 if (inner_is_member && ioff != 0 && ooff != 0) {
728 if (cp->klass_name_at_matches(outer, ooff) &&
729 cp->klass_name_at_matches(inner, ioff)) {
730 Klass* o = cp->klass_at(ooff, CHECK);
731 if (o == outer) {
732 Klass* i = cp->klass_at(ioff, CHECK);
733 if (i == inner) {
734 return;
735 }
736 }
737 }
738 }
739
740 if (!inner_is_member && ioff != 0 && ooff == 0 &&
741 cp->klass_name_at_matches(inner, ioff)) {
742 Klass* i = cp->klass_at(ioff, CHECK);
743 if (i == inner) {
744 return;
745 }
746 }
747 }
748
749 // 'inner' not declared as an inner klass in outer
750 ResourceMark rm(THREAD);
751 Exceptions::fthrow(
752 THREAD_AND_LOCATION,
753 vmSymbols::java_lang_IncompatibleClassChangeError(),
754 "%s and %s disagree on InnerClasses attribute",
755 outer->external_name(),
756 inner->external_name()
757 );
758 }
759
760 // Returns Q-mirror if qtype_if_value is true and k is a ValueKlass;
761 // otherwise returns java_mirror or L-mirror for ValueKlass
762 static oop java_mirror(Klass* k, jboolean qtype_if_value) {
763 if (k->is_value()) {
764 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(k));
765 return qtype_if_value ? vk->value_mirror() : vk->nullable_mirror();
766 } else {
767 return k->java_mirror();
768 }
769 }
770
771 // Utility method converting a single SignatureStream element into java.lang.Class instance
772 static oop get_mirror_from_signature(const methodHandle& method,
773 SignatureStream* ss,
774 TRAPS) {
775
776 BasicType bt = ss->type();
777 if (T_OBJECT == bt || T_ARRAY == bt || T_VALUETYPE == bt) {
778 Symbol* name = ss->as_symbol(CHECK_NULL);
779 oop loader = method->method_holder()->class_loader();
780 oop protection_domain = method->method_holder()->protection_domain();
781 const Klass* k = SystemDictionary::resolve_or_fail(name,
782 Handle(THREAD, loader),
783 Handle(THREAD, protection_domain),
784 true,
785 CHECK_NULL);
786 if (log_is_enabled(Debug, class, resolve)) {
787 trace_class_resolution(k);
788 }
789 return java_mirror((Klass*)k, bt == T_VALUETYPE);
790 }
791
792 assert(bt != T_VOID || ss->at_return_type(),
793 "T_VOID should only appear as return type");
794
795 return java_lang_Class::primitive_mirror(bt);
796 }
797
798 static objArrayHandle get_parameter_types(const methodHandle& method,
799 int parameter_count,
800 oop* return_type,
801 TRAPS) {
802 // Allocate array holding parameter types (java.lang.Class instances)
803 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
804 objArrayHandle mirrors(THREAD, m);
805 int index = 0;
806 // Collect parameter types
807 ResourceMark rm(THREAD);
808 Symbol* signature = method->signature();
809 SignatureStream ss(signature);
810 while (!ss.at_return_type()) {
811 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
812 mirrors->obj_at_put(index++, mirror);
813 ss.next();
814 }
815 assert(index == parameter_count, "invalid parameter count");
816 if (return_type != NULL) {
817 // Collect return type as well
818 assert(ss.at_return_type(), "return type should be present");
819 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
820 }
821 return mirrors;
822 }
823
824 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
825 return method->resolved_checked_exceptions(THREAD);
826 }
827
828 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
829 // Basic types
830 BasicType type = vmSymbols::signature_type(signature);
831 if (type != T_OBJECT && type != T_VALUETYPE) {
832 return Handle(THREAD, Universe::java_mirror(type));
833 }
834
835 Klass* result =
836 SystemDictionary::resolve_or_fail(signature,
837 Handle(THREAD, k->class_loader()),
838 Handle(THREAD, k->protection_domain()),
839 true, CHECK_(Handle()));
840
841 if (log_is_enabled(Debug, class, resolve)) {
842 trace_class_resolution(result);
843 }
844 oop nt = java_mirror(result, type == T_VALUETYPE);
845 return Handle(THREAD, nt);
846 }
847
848
849 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
850 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
851 assert(!method()->name()->starts_with('<') || for_constant_pool_access,
852 "should call new_constructor instead");
853 InstanceKlass* holder = method->method_holder();
854 int slot = method->method_idnum();
855
856 Symbol* signature = method->signature();
857 int parameter_count = ArgumentCount(signature).size();
858 oop return_type_oop = NULL;
859 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
860 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
861
862 Handle return_type(THREAD, return_type_oop);
863
864 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
865
866 if (exception_types.is_null()) return NULL;
867
868 Symbol* method_name = method->name();
869 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
870 Handle name = Handle(THREAD, name_oop);
871 if (name == NULL) return NULL;
872
873 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
874
875 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
876
877 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
878 java_lang_reflect_Method::set_slot(mh(), slot);
879 java_lang_reflect_Method::set_name(mh(), name());
880 java_lang_reflect_Method::set_return_type(mh(), return_type());
881 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
882 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
883 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
884 java_lang_reflect_Method::set_override(mh(), false);
885 if (method->generic_signature() != NULL) {
886 Symbol* gs = method->generic_signature();
887 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
888 java_lang_reflect_Method::set_signature(mh(), sig());
889 }
890 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
891 java_lang_reflect_Method::set_annotations(mh(), an_oop);
892 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
893 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
894 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
895 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
896 return mh();
897 }
898
899
900 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
901 assert(method()->is_object_constructor() ||
902 method()->is_static_init_factory(),
903 "should call new_method instead");
904
905 InstanceKlass* holder = method->method_holder();
906 int slot = method->method_idnum();
907
908 Symbol* signature = method->signature();
909 int parameter_count = ArgumentCount(signature).size();
910 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
911 if (parameter_types.is_null()) return NULL;
912
913 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
914 if (exception_types.is_null()) return NULL;
915
916 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
917
918 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
919
920 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
921 java_lang_reflect_Constructor::set_slot(ch(), slot);
922 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
923 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
924 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
925 java_lang_reflect_Constructor::set_override(ch(), false);
926 if (method->generic_signature() != NULL) {
927 Symbol* gs = method->generic_signature();
928 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
929 java_lang_reflect_Constructor::set_signature(ch(), sig());
930 }
931 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
932 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
933 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
934 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
935 return ch();
936 }
937
938
939 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
940 Symbol* field_name = fd->name();
941 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
942 Handle name = Handle(THREAD, name_oop);
943 Symbol* signature = fd->signature();
944 InstanceKlass* holder = fd->field_holder();
945 Handle type = new_type(signature, holder, CHECK_NULL);
946 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
947
948 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
949 java_lang_reflect_Field::set_slot(rh(), fd->index());
950 java_lang_reflect_Field::set_name(rh(), name());
951 java_lang_reflect_Field::set_type(rh(), type());
952 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
953 int modifiers = fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS;
954 if (fd->is_flattenable()) {
955 modifiers |= JVM_ACC_FIELD_FLATTENABLE;
956 // JVM_ACC_FLATTENABLE should not be set in LWorld. set_is_flattenable should be re-examined.
957 modifiers &= ~JVM_ACC_FLATTENABLE;
958 }
959 if (fd->is_flattened()) {
960 modifiers |= JVM_ACC_FIELD_FLATTENED;
961 }
962 java_lang_reflect_Field::set_modifiers(rh(), modifiers);
963 java_lang_reflect_Field::set_override(rh(), false);
964 if (fd->has_generic_signature()) {
965 Symbol* gs = fd->generic_signature();
966 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
967 java_lang_reflect_Field::set_signature(rh(), sig());
968 }
969 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
970 java_lang_reflect_Field::set_annotations(rh(), an_oop);
971 return rh();
972 }
973
974 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
975 int flags, TRAPS) {
976
977 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
978
979 if(NULL != sym) {
980 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
981 java_lang_reflect_Parameter::set_name(rh(), name());
982 } else {
983 java_lang_reflect_Parameter::set_name(rh(), NULL);
984 }
985
986 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
987 java_lang_reflect_Parameter::set_executable(rh(), method());
988 java_lang_reflect_Parameter::set_index(rh(), index);
989 return rh();
990 }
991
992
993 static methodHandle resolve_interface_call(InstanceKlass* klass,
994 const methodHandle& method,
995 Klass* recv_klass,
996 Handle receiver,
997 TRAPS) {
998
999 assert(!method.is_null() , "method should not be null");
1000
1001 CallInfo info;
1002 Symbol* signature = method->signature();
1003 Symbol* name = method->name();
1004 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
1005 LinkInfo(klass, name, signature),
1006 true,
1007 CHECK_(methodHandle()));
1008 return info.selected_method();
1009 }
1010
1011 // Conversion
1012 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1013 assert(java_lang_Class::is_primitive(basic_type_mirror),
1014 "just checking");
1015 return java_lang_Class::primitive_type(basic_type_mirror);
1016 }
1017
1018 // Narrowing of basic types. Used to create correct jvalues for
1019 // boolean, byte, char and short return return values from interpreter
1020 // which are returned as ints. Throws IllegalArgumentException.
1021 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1022 switch (narrow_type) {
1023 case T_BOOLEAN:
1024 value->z = (jboolean) (value->i & 1);
1025 return;
1026 case T_BYTE:
1027 value->b = (jbyte)value->i;
1028 return;
1029 case T_CHAR:
1030 value->c = (jchar)value->i;
1031 return;
1032 case T_SHORT:
1033 value->s = (jshort)value->i;
1034 return;
1035 default:
1036 break; // fail
1037 }
1038 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1039 }
1040
1041
1042 // Method call (shared by invoke_method and invoke_constructor)
1043 static oop invoke(InstanceKlass* klass,
1044 const methodHandle& reflected_method,
1045 Handle receiver,
1046 bool override,
1047 objArrayHandle ptypes,
1048 BasicType rtype,
1049 objArrayHandle args,
1050 bool is_method_invoke,
1051 TRAPS) {
1052
1053 ResourceMark rm(THREAD);
1054
1055 methodHandle method; // actual method to invoke
1056 Klass* target_klass; // target klass, receiver's klass for non-static
1057
1058 // Ensure klass is initialized
1059 klass->initialize(CHECK_NULL);
1060
1061 bool is_static = reflected_method->is_static();
1062 if (is_static) {
1063 // ignore receiver argument
1064 method = reflected_method;
1065 target_klass = klass;
1066 } else {
1067 // check for null receiver
1068 if (receiver.is_null()) {
1069 THROW_0(vmSymbols::java_lang_NullPointerException());
1070 }
1071 // Check class of receiver against class declaring method
1072 if (!receiver->is_a(klass)) {
1073 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1074 }
1075 // target klass is receiver's klass
1076 target_klass = receiver->klass();
1077 // no need to resolve if method is private or <init>
1078 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
1079 method = reflected_method;
1080 } else {
1081 // resolve based on the receiver
1082 if (reflected_method->method_holder()->is_interface()) {
1083 // resolve interface call
1084 //
1085 // Match resolution errors with those thrown due to reflection inlining
1086 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1087 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1088 if (HAS_PENDING_EXCEPTION) {
1089 // Method resolution threw an exception; wrap it in an InvocationTargetException
1090 oop resolution_exception = PENDING_EXCEPTION;
1091 CLEAR_PENDING_EXCEPTION;
1092 // JVMTI has already reported the pending exception
1093 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1094 if (THREAD->is_Java_thread()) {
1095 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1096 }
1097 JavaCallArguments args(Handle(THREAD, resolution_exception));
1098 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1099 vmSymbols::throwable_void_signature(),
1100 &args);
1101 }
1102 } else {
1103 // if the method can be overridden, we resolve using the vtable index.
1104 assert(!reflected_method->has_itable_index(), "");
1105 int index = reflected_method->vtable_index();
1106 method = reflected_method;
1107 if (index != Method::nonvirtual_vtable_index) {
1108 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1109 }
1110 if (!method.is_null()) {
1111 // Check for abstract methods as well
1112 if (method->is_abstract()) {
1113 // new default: 6531596
1114 ResourceMark rm(THREAD);
1115 stringStream ss;
1116 ss.print("'");
1117 Method::print_external_name(&ss, target_klass, method->name(), method->signature());
1118 ss.print("'");
1119 Handle h_origexception = Exceptions::new_exception(THREAD,
1120 vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1121 JavaCallArguments args(h_origexception);
1122 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1123 vmSymbols::throwable_void_signature(),
1124 &args);
1125 }
1126 }
1127 }
1128 }
1129 }
1130
1131 // I believe this is a ShouldNotGetHere case which requires
1132 // an internal vtable bug. If you ever get this please let Karen know.
1133 if (method.is_null()) {
1134 ResourceMark rm(THREAD);
1135 stringStream ss;
1136 ss.print("'");
1137 Method::print_external_name(&ss, klass,
1138 reflected_method->name(),
1139 reflected_method->signature());
1140 ss.print("'");
1141 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
1142 }
1143
1144 assert(ptypes->is_objArray(), "just checking");
1145 int args_len = args.is_null() ? 0 : args->length();
1146 // Check number of arguments
1147 if (ptypes->length() != args_len) {
1148 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1149 "wrong number of arguments");
1150 }
1151
1152 // Create object to contain parameters for the JavaCall
1153 JavaCallArguments java_args(method->size_of_parameters());
1154
1155 if (!is_static) {
1156 java_args.push_oop(receiver);
1157 }
1158
1159 for (int i = 0; i < args_len; i++) {
1160 oop type_mirror = ptypes->obj_at(i);
1161 oop arg = args->obj_at(i);
1162 if (java_lang_Class::is_primitive(type_mirror)) {
1163 jvalue value;
1164 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1165 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1166 if (ptype != atype) {
1167 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1168 }
1169 switch (ptype) {
1170 case T_BOOLEAN: java_args.push_int(value.z); break;
1171 case T_CHAR: java_args.push_int(value.c); break;
1172 case T_BYTE: java_args.push_int(value.b); break;
1173 case T_SHORT: java_args.push_int(value.s); break;
1174 case T_INT: java_args.push_int(value.i); break;
1175 case T_LONG: java_args.push_long(value.j); break;
1176 case T_FLOAT: java_args.push_float(value.f); break;
1177 case T_DOUBLE: java_args.push_double(value.d); break;
1178 default:
1179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1180 }
1181 } else {
1182 if (arg != NULL) {
1183 Klass* k = java_lang_Class::as_Klass(type_mirror);
1184 if (!arg->is_a(k)) {
1185 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1186 "argument type mismatch");
1187 }
1188 }
1189 Handle arg_handle(THREAD, arg); // Create handle for argument
1190 java_args.push_oop(arg_handle); // Push handle
1191 }
1192 }
1193
1194 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1195 "just checking");
1196
1197 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1198 // oop (i.e., NOT as an handle)
1199 JavaValue result(rtype);
1200 JavaCalls::call(&result, method, &java_args, THREAD);
1201
1202 if (HAS_PENDING_EXCEPTION) {
1203 // Method threw an exception; wrap it in an InvocationTargetException
1204 oop target_exception = PENDING_EXCEPTION;
1205 CLEAR_PENDING_EXCEPTION;
1206 // JVMTI has already reported the pending exception
1207 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1208 if (THREAD->is_Java_thread()) {
1209 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1210 }
1211
1212 JavaCallArguments args(Handle(THREAD, target_exception));
1213 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1214 vmSymbols::throwable_void_signature(),
1215 &args);
1216 } else {
1217 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1218 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1219 }
1220 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1221 }
1222 }
1223
1224 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1225 // of java.lang.reflect.Constructor
1226
1227 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1228 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1229 int slot = java_lang_reflect_Method::slot(method_mirror);
1230 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1231 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1232
1233 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1234 BasicType rtype;
1235 if (java_lang_Class::is_primitive(return_type_mirror)) {
1236 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1237 } else if (java_lang_Class::inline_type_mirror(return_type_mirror) == return_type_mirror) {
1238 rtype = T_VALUETYPE;
1239 } else {
1240 rtype = T_OBJECT;
1241 }
1242
1243 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1244 Method* m = klass->method_with_idnum(slot);
1245 if (m == NULL) {
1246 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1247 }
1248 methodHandle method(THREAD, m);
1249
1250 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1251 }
1252
1253
1254 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1255 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1256 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1257 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1258 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1259
1260 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1261 Method* m = klass->method_with_idnum(slot);
1262 if (m == NULL) {
1263 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1264 }
1265 methodHandle method(THREAD, m);
1266 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1267
1268 // Make sure klass gets initialize
1269 klass->initialize(CHECK_NULL);
1270
1271 // Create new instance (the receiver)
1272 klass->check_valid_for_instantiation(false, CHECK_NULL);
1273
1274 // Special case for factory methods
1275 if (!method->signature()->is_void_method_signature()) {
1276 assert(klass->is_value(), "inline classes must use factory methods");
1277 Handle no_receiver; // null instead of receiver
1278 return invoke(klass, method, no_receiver, override, ptypes, T_OBJECT, args, false, CHECK_NULL);
1279 }
1280
1281 // main branch of code creates a non-inline object:
1282 assert(!klass->is_value(), "classic constructors are only for non-inline classes");
1283 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1284
1285 // Ignore result from call and return receiver
1286 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1287 return receiver();
1288 }