1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/moduleEntry.hpp"
29 #include "classfile/packageEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/verifier.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "logging/log.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/typeArrayOop.inline.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/reflection.hpp"
49 #include "runtime/reflectionUtils.hpp"
50 #include "runtime/signature.hpp"
51 #include "runtime/vframe.inline.hpp"
52
53 static void trace_class_resolution(const Klass* to_class) {
54 ResourceMark rm;
55 int line_number = -1;
56 const char * source_file = NULL;
57 Klass* caller = NULL;
58 JavaThread* jthread = JavaThread::current();
59 if (jthread->has_last_Java_frame()) {
60 vframeStream vfst(jthread);
61 // skip over any frames belonging to java.lang.Class
62 while (!vfst.at_end() &&
63 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
64 vfst.next();
65 }
66 if (!vfst.at_end()) {
67 // this frame is a likely suspect
68 caller = vfst.method()->method_holder();
69 line_number = vfst.method()->line_number_from_bci(vfst.bci());
70 Symbol* s = vfst.method()->method_holder()->source_file_name();
71 if (s != NULL) {
72 source_file = s->as_C_string();
73 }
74 }
75 }
76 if (caller != NULL) {
77 const char * from = caller->external_name();
78 const char * to = to_class->external_name();
79 // print in a single call to reduce interleaving between threads
80 if (source_file != NULL) {
81 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
82 } else {
83 log_debug(class, resolve)("%s %s (reflection)", from, to);
84 }
85 }
86 }
87
88
89 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
90 if (type == T_VOID) {
91 return NULL;
92 }
93 if (type == T_OBJECT || type == T_ARRAY) {
94 // regular objects are not boxed
95 return (oop) value->l;
96 }
97 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
98 if (result == NULL) {
99 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
100 }
101 return result;
102 }
103
104
105 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
106 if (box == NULL) {
107 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
108 }
109 return java_lang_boxing_object::get_value(box, value);
110 }
111
112 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
113 // Note: box is really the unboxed oop. It might even be a Short, etc.!
114 value->l = (jobject) box;
115 return T_OBJECT;
116 }
117
118
119 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
120 assert(wide_type != current_type, "widen should not be called with identical types");
121 switch (wide_type) {
122 case T_BOOLEAN:
123 case T_BYTE:
124 case T_CHAR:
125 break; // fail
126 case T_SHORT:
127 switch (current_type) {
128 case T_BYTE:
129 value->s = (jshort) value->b;
130 return;
131 default:
132 break;
133 }
134 break; // fail
135 case T_INT:
136 switch (current_type) {
137 case T_BYTE:
138 value->i = (jint) value->b;
139 return;
140 case T_CHAR:
141 value->i = (jint) value->c;
142 return;
143 case T_SHORT:
144 value->i = (jint) value->s;
145 return;
146 default:
147 break;
148 }
149 break; // fail
150 case T_LONG:
151 switch (current_type) {
152 case T_BYTE:
153 value->j = (jlong) value->b;
154 return;
155 case T_CHAR:
156 value->j = (jlong) value->c;
157 return;
158 case T_SHORT:
159 value->j = (jlong) value->s;
160 return;
161 case T_INT:
162 value->j = (jlong) value->i;
163 return;
164 default:
165 break;
166 }
167 break; // fail
168 case T_FLOAT:
169 switch (current_type) {
170 case T_BYTE:
171 value->f = (jfloat) value->b;
172 return;
173 case T_CHAR:
174 value->f = (jfloat) value->c;
175 return;
176 case T_SHORT:
177 value->f = (jfloat) value->s;
178 return;
179 case T_INT:
180 value->f = (jfloat) value->i;
181 return;
182 case T_LONG:
183 value->f = (jfloat) value->j;
184 return;
185 default:
186 break;
187 }
188 break; // fail
189 case T_DOUBLE:
190 switch (current_type) {
191 case T_BYTE:
192 value->d = (jdouble) value->b;
193 return;
194 case T_CHAR:
195 value->d = (jdouble) value->c;
196 return;
197 case T_SHORT:
198 value->d = (jdouble) value->s;
199 return;
200 case T_INT:
201 value->d = (jdouble) value->i;
202 return;
203 case T_FLOAT:
204 value->d = (jdouble) value->f;
205 return;
206 case T_LONG:
207 value->d = (jdouble) value->j;
208 return;
209 default:
210 break;
211 }
212 break; // fail
213 default:
214 break; // fail
215 }
216 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
217 }
218
219
220 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
221 if (!a->is_within_bounds(index)) {
222 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
223 }
224 if (a->is_objArray()) {
225 value->l = (jobject) objArrayOop(a)->obj_at(index);
226 return T_OBJECT;
227 } else {
228 assert(a->is_typeArray(), "just checking");
229 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
230 switch (type) {
231 case T_BOOLEAN:
232 value->z = typeArrayOop(a)->bool_at(index);
233 break;
234 case T_CHAR:
235 value->c = typeArrayOop(a)->char_at(index);
236 break;
237 case T_FLOAT:
238 value->f = typeArrayOop(a)->float_at(index);
239 break;
240 case T_DOUBLE:
241 value->d = typeArrayOop(a)->double_at(index);
242 break;
243 case T_BYTE:
244 value->b = typeArrayOop(a)->byte_at(index);
245 break;
246 case T_SHORT:
247 value->s = typeArrayOop(a)->short_at(index);
248 break;
249 case T_INT:
250 value->i = typeArrayOop(a)->int_at(index);
251 break;
252 case T_LONG:
253 value->j = typeArrayOop(a)->long_at(index);
254 break;
255 default:
256 return T_ILLEGAL;
257 }
258 return type;
259 }
260 }
261
262
263 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
264 if (!a->is_within_bounds(index)) {
265 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
266 }
267 if (a->is_objArray()) {
268 if (value_type == T_OBJECT) {
269 oop obj = (oop) value->l;
270 if (obj != NULL) {
271 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
272 if (!obj->is_a(element_klass)) {
273 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
274 }
275 }
276 objArrayOop(a)->obj_at_put(index, obj);
277 }
278 } else {
279 assert(a->is_typeArray(), "just checking");
280 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
281 if (array_type != value_type) {
282 // The widen operation can potentially throw an exception, but cannot block,
283 // so typeArrayOop a is safe if the call succeeds.
284 widen(value, value_type, array_type, CHECK);
285 }
286 switch (array_type) {
287 case T_BOOLEAN:
288 typeArrayOop(a)->bool_at_put(index, value->z);
289 break;
290 case T_CHAR:
291 typeArrayOop(a)->char_at_put(index, value->c);
292 break;
293 case T_FLOAT:
294 typeArrayOop(a)->float_at_put(index, value->f);
295 break;
296 case T_DOUBLE:
297 typeArrayOop(a)->double_at_put(index, value->d);
298 break;
299 case T_BYTE:
300 typeArrayOop(a)->byte_at_put(index, value->b);
301 break;
302 case T_SHORT:
303 typeArrayOop(a)->short_at_put(index, value->s);
304 break;
305 case T_INT:
306 typeArrayOop(a)->int_at_put(index, value->i);
307 break;
308 case T_LONG:
309 typeArrayOop(a)->long_at_put(index, value->j);
310 break;
311 default:
312 THROW(vmSymbols::java_lang_IllegalArgumentException());
313 }
314 }
315 }
316
317 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
318 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
319 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
320 if (type == T_VOID) {
321 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
322 }
323 else {
324 return Universe::typeArrayKlassObj(type);
325 }
326 }
327
328 #ifdef ASSERT
329 static oop basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) {
330 BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type();
331 return Universe::java_mirror(type);
332 }
333 #endif
334
335 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
336 if (element_mirror == NULL) {
337 THROW_0(vmSymbols::java_lang_NullPointerException());
338 }
339 if (length < 0) {
340 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
341 }
342 if (java_lang_Class::is_primitive(element_mirror)) {
343 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
344 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
345 } else {
346 Klass* k = java_lang_Class::as_Klass(element_mirror);
347 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
348 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
349 }
350 return oopFactory::new_objArray(k, length, THREAD);
351 }
352 }
353
354
355 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
356 assert(dim_array->is_typeArray(), "just checking");
357 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
358
359 if (element_mirror == NULL) {
360 THROW_0(vmSymbols::java_lang_NullPointerException());
361 }
362
363 int len = dim_array->length();
364 if (len <= 0 || len > MAX_DIM) {
365 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
366 }
367
368 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
369 for (int i = 0; i < len; i++) {
370 int d = dim_array->int_at(i);
371 if (d < 0) {
372 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
373 }
374 dimensions[i] = d;
375 }
376
377 Klass* klass;
378 int dim = len;
379 if (java_lang_Class::is_primitive(element_mirror)) {
380 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
381 } else {
382 klass = java_lang_Class::as_Klass(element_mirror);
383 if (klass->is_array_klass()) {
384 int k_dim = ArrayKlass::cast(klass)->dimension();
385 if (k_dim + len > MAX_DIM) {
386 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
387 }
388 dim += k_dim;
389 }
390 }
391 klass = klass->array_klass(dim, CHECK_NULL);
392 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
393 assert(obj->is_array(), "just checking");
394 return arrayOop(obj);
395 }
396
397
398 oop Reflection::array_component_type(oop mirror, TRAPS) {
399 if (java_lang_Class::is_primitive(mirror)) {
400 return NULL;
401 }
402
403 Klass* klass = java_lang_Class::as_Klass(mirror);
404 if (!klass->is_array_klass()) {
405 return NULL;
406 }
407
408 oop result = java_lang_Class::component_mirror(mirror);
409 #ifdef ASSERT
410 oop result2 = NULL;
411 if (ArrayKlass::cast(klass)->dimension() == 1) {
412 if (klass->is_typeArray_klass()) {
413 result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
414 } else {
415 result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror();
416 }
417 } else {
418 Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension();
419 assert(lower_dim->is_array_klass(), "just checking");
420 result2 = lower_dim->java_mirror();
421 }
422 assert(oopDesc::equals(result, result2), "results must be consistent");
423 #endif //ASSERT
424 return result;
425 }
426
427 static bool under_host_klass(const InstanceKlass* ik, const InstanceKlass* host_klass) {
428 DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
429 for (;;) {
430 const InstanceKlass* hc = ik->host_klass();
431 if (hc == NULL) return false;
432 if (hc == host_klass) return true;
433 ik = hc;
434
435 // There's no way to make a host class loop short of patching memory.
436 // Therefore there cannot be a loop here unless there's another bug.
437 // Still, let's check for it.
438 assert(--inf_loop_check > 0, "no host_klass loop");
439 }
440 }
441
442 static bool can_relax_access_check_for(const Klass* accessor,
443 const Klass* accessee,
444 bool classloader_only) {
445
446 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
447 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
448
449 // If either is on the other's host_klass chain, access is OK,
450 // because one is inside the other.
451 if (under_host_klass(accessor_ik, accessee_ik) ||
452 under_host_klass(accessee_ik, accessor_ik))
453 return true;
454
455 if ((RelaxAccessControlCheck &&
456 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
457 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) ||
458 (accessor_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION &&
459 accessee_ik->major_version() < Verifier::STRICTER_ACCESS_CTRL_CHECK_VERSION)) {
460 return classloader_only &&
461 Verifier::relax_access_for(accessor_ik->class_loader()) &&
462 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
463 accessor_ik->class_loader() == accessee_ik->class_loader();
464 }
465
466 return false;
467 }
468
469 /*
470 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
471
472 Callee T in Callee T in package PT,
473 unnamed module runtime module MT
474 ------------------------------------------------------------------------------------------------
475
476 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
477 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
478 unnamed module: YES
479 Else if (MS can read MT (establish readability) &&
480 ((MT exports PT to MS or to all modules) ||
481 (MT is open))): YES
482
483 ------------------------------------------------------------------------------------------------
484 Caller S in unnamed YES Readability exists because unnamed module
485 module UM "reads" all modules
486 if (MT exports PT to UM or to all modules): YES
487
488 ------------------------------------------------------------------------------------------------
489
490 Note: a loose module is a module that can read all current and future unnamed modules.
491 */
492 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
493 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
494
495 // Verify that current_class can access new_class. If the classloader_only
496 // flag is set, we automatically allow any accesses in which current_class
497 // doesn't have a classloader.
498 if ((current_class == NULL) ||
499 (current_class == new_class) ||
500 is_same_class_package(current_class, new_class)) {
501 return ACCESS_OK;
502 }
503 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
504 // succeed trivially.
505 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
506 return ACCESS_OK;
507 }
508
509 // module boundaries
510 if (new_class->is_public()) {
511 // Ignore modules for DumpSharedSpaces because we do not have any package
512 // or module information for modules other than java.base.
513 if (DumpSharedSpaces) {
514 return ACCESS_OK;
515 }
516
517 // Find the module entry for current_class, the accessor
518 ModuleEntry* module_from = current_class->module();
519 // Find the module entry for new_class, the accessee
520 ModuleEntry* module_to = new_class->module();
521
522 // both in same (possibly unnamed) module
523 if (module_from == module_to) {
524 return ACCESS_OK;
525 }
526
527 // Acceptable access to a type in an unnamed module. Note that since
528 // unnamed modules can read all unnamed modules, this also handles the
529 // case where module_from is also unnamed but in a different class loader.
530 if (!module_to->is_named() &&
531 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
532 return ACCESS_OK;
533 }
534
535 // Establish readability, check if module_from is allowed to read module_to.
536 if (!module_from->can_read(module_to)) {
537 return MODULE_NOT_READABLE;
538 }
539
540 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
541 if (module_to->is_open()) {
542 return ACCESS_OK;
543 }
544
545 PackageEntry* package_to = new_class->package();
546 assert(package_to != NULL, "can not obtain new_class' package");
547
548 {
549 MutexLocker m1(Module_lock);
550
551 // Once readability is established, if module_to exports T unqualifiedly,
552 // (to all modules), than whether module_from is in the unnamed module
553 // or not does not matter, access is allowed.
554 if (package_to->is_unqual_exported()) {
555 return ACCESS_OK;
556 }
557
558 // Access is allowed if both 1 & 2 hold:
559 // 1. Readability, module_from can read module_to (established above).
560 // 2. Either module_to exports T to module_from qualifiedly.
561 // or
562 // module_to exports T to all unnamed modules and module_from is unnamed.
563 // or
564 // module_to exports T unqualifiedly to all modules (checked above).
565 if (!package_to->is_qexported_to(module_from)) {
566 return TYPE_NOT_EXPORTED;
567 }
568 }
569 return ACCESS_OK;
570 }
571
572 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
573 return ACCESS_OK;
574 }
575 return OTHER_PROBLEM;
576 }
577
578 // Return an error message specific to the specified Klass*'s and result.
579 // This function must be called from within a block containing a ResourceMark.
580 char* Reflection::verify_class_access_msg(const Klass* current_class,
581 const InstanceKlass* new_class,
582 const VerifyClassAccessResults result) {
583 assert(result != ACCESS_OK, "must be failure result");
584 char * msg = NULL;
585 if (result != OTHER_PROBLEM && new_class != NULL && current_class != NULL) {
586 // Find the module entry for current_class, the accessor
587 ModuleEntry* module_from = current_class->module();
588 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
589 const char * current_class_name = current_class->external_name();
590
591 // Find the module entry for new_class, the accessee
592 ModuleEntry* module_to = NULL;
593 module_to = new_class->module();
594 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
595 const char * new_class_name = new_class->external_name();
596
597 if (result == MODULE_NOT_READABLE) {
598 assert(module_from->is_named(), "Unnamed modules can read all modules");
599 if (module_to->is_named()) {
600 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
601 strlen(new_class_name) + 2*strlen(module_to_name);
602 msg = NEW_RESOURCE_ARRAY(char, len);
603 jio_snprintf(msg, len - 1,
604 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
605 current_class_name, module_from_name, new_class_name,
606 module_to_name, module_from_name, module_to_name);
607 } else {
608 oop jlm = module_to->module();
609 assert(jlm != NULL, "Null jlm in module_to ModuleEntry");
610 intptr_t identity_hash = jlm->identity_hash();
611 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
612 strlen(new_class_name) + 2*sizeof(uintx);
613 msg = NEW_RESOURCE_ARRAY(char, len);
614 jio_snprintf(msg, len - 1,
615 "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,
616 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
617 module_from_name, uintx(identity_hash));
618 }
619
620 } else if (result == TYPE_NOT_EXPORTED) {
621 assert(new_class->package() != NULL,
622 "Unnamed packages are always exported");
623 const char * package_name =
624 new_class->package()->name()->as_klass_external_name();
625 assert(module_to->is_named(), "Unnamed modules export all packages");
626 if (module_from->is_named()) {
627 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
628 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
629 msg = NEW_RESOURCE_ARRAY(char, len);
630 jio_snprintf(msg, len - 1,
631 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
632 current_class_name, module_from_name, new_class_name,
633 module_to_name, module_to_name, package_name, module_from_name);
634 } else {
635 oop jlm = module_from->module();
636 assert(jlm != NULL, "Null jlm in module_from ModuleEntry");
637 intptr_t identity_hash = jlm->identity_hash();
638 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
639 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
640 msg = NEW_RESOURCE_ARRAY(char, len);
641 jio_snprintf(msg, len - 1,
642 "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,
643 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
644 module_to_name, package_name, uintx(identity_hash));
645 }
646 } else {
647 ShouldNotReachHere();
648 }
649 } // result != OTHER_PROBLEM...
650 return msg;
651 }
652
653 bool Reflection::verify_member_access(const Klass* current_class,
654 const Klass* resolved_class,
655 const Klass* member_class,
656 AccessFlags access,
657 bool classloader_only,
658 bool protected_restriction,
659 TRAPS) {
660 // Verify that current_class can access a member of member_class, where that
661 // field's access bits are "access". We assume that we've already verified
662 // that current_class can access member_class.
663 //
664 // If the classloader_only flag is set, we automatically allow any accesses
665 // in which current_class doesn't have a classloader.
666 //
667 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
668 // need this distinction (e.g. if all we have is the runtime type, or during
669 // class file parsing when we only care about the static type); in that case
670 // callers should ensure that resolved_class == member_class.
671 //
672 if ((current_class == NULL) ||
673 (current_class == member_class) ||
674 access.is_public()) {
675 return true;
676 }
677
678 const Klass* host_class = current_class;
679 if (host_class->is_instance_klass() &&
680 InstanceKlass::cast(host_class)->is_anonymous()) {
681 host_class = InstanceKlass::cast(host_class)->host_klass();
682 assert(host_class != NULL, "Anonymous class has null host class");
683 assert(!(host_class->is_instance_klass() &&
684 InstanceKlass::cast(host_class)->is_anonymous()),
685 "host_class should not be anonymous");
686 }
687 if (host_class == member_class) {
688 return true;
689 }
690
691 if (access.is_protected()) {
692 if (!protected_restriction) {
693 // See if current_class (or outermost host class) is a subclass of member_class
694 // An interface may not access protected members of j.l.Object
695 if (!host_class->is_interface() && host_class->is_subclass_of(member_class)) {
696 if (access.is_static() || // static fields are ok, see 6622385
697 current_class == resolved_class ||
698 member_class == resolved_class ||
699 host_class->is_subclass_of(resolved_class) ||
700 resolved_class->is_subclass_of(host_class)) {
701 return true;
702 }
703 }
704 }
705 }
706
707 // package access
708 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
709 return true;
710 }
711
712 // private access between different classes needs a nestmate check, but
713 // not for anonymous classes - so check host_class
714 if (access.is_private() && host_class == current_class) {
715 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
716 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
717 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
718 // Nestmate access checks may require resolution and validation of the nest-host.
719 // It is up to the caller to check for pending exceptions and handle appropriately.
720 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
721 if (access) {
722 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
723 return true;
724 }
725 }
726 }
727
728 // Allow all accesses from jdk/internal/reflect/MagicAccessorImpl subclasses to
729 // succeed trivially.
730 if (current_class->is_subclass_of(SystemDictionary::reflect_MagicAccessorImpl_klass())) {
731 return true;
732 }
733
734 // Check for special relaxations
735 return can_relax_access_check_for(current_class, member_class, classloader_only);
736 }
737
738 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
739 return InstanceKlass::cast(class1)->is_same_class_package(class2);
740 }
741
742 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
743 // throw an incompatible class change exception
744 // If inner_is_member, require the inner to be a member of the outer.
745 // If !inner_is_member, require the inner to be anonymous (a non-member).
746 // Caller is responsible for figuring out in advance which case must be true.
747 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
748 bool inner_is_member, TRAPS) {
749 InnerClassesIterator iter(outer);
750 constantPoolHandle cp (THREAD, outer->constants());
751 for (; !iter.done(); iter.next()) {
752 int ioff = iter.inner_class_info_index();
753 int ooff = iter.outer_class_info_index();
754
755 if (inner_is_member && ioff != 0 && ooff != 0) {
756 Klass* o = cp->klass_at(ooff, CHECK);
757 if (o == outer) {
758 Klass* i = cp->klass_at(ioff, CHECK);
759 if (i == inner) {
760 return;
761 }
762 }
763 }
764 if (!inner_is_member && ioff != 0 && ooff == 0 &&
765 cp->klass_name_at_matches(inner, ioff)) {
766 Klass* i = cp->klass_at(ioff, CHECK);
767 if (i == inner) {
768 return;
769 }
770 }
771 }
772
773 // 'inner' not declared as an inner klass in outer
774 ResourceMark rm(THREAD);
775 Exceptions::fthrow(
776 THREAD_AND_LOCATION,
777 vmSymbols::java_lang_IncompatibleClassChangeError(),
778 "%s and %s disagree on InnerClasses attribute",
779 outer->external_name(),
780 inner->external_name()
781 );
782 }
783
784 // Utility method converting a single SignatureStream element into java.lang.Class instance
785 static oop get_mirror_from_signature(const methodHandle& method,
786 SignatureStream* ss,
787 TRAPS) {
788
789
790 if (T_OBJECT == ss->type() || T_ARRAY == ss->type()) {
791 Symbol* name = ss->as_symbol(CHECK_NULL);
792 oop loader = method->method_holder()->class_loader();
793 oop protection_domain = method->method_holder()->protection_domain();
794 const Klass* k = SystemDictionary::resolve_or_fail(name,
795 Handle(THREAD, loader),
796 Handle(THREAD, protection_domain),
797 true,
798 CHECK_NULL);
799 if (log_is_enabled(Debug, class, resolve)) {
800 trace_class_resolution(k);
801 }
802 return k->java_mirror();
803 }
804
805 assert(ss->type() != T_VOID || ss->at_return_type(),
806 "T_VOID should only appear as return type");
807
808 return java_lang_Class::primitive_mirror(ss->type());
809 }
810
811 static objArrayHandle get_parameter_types(const methodHandle& method,
812 int parameter_count,
813 oop* return_type,
814 TRAPS) {
815 // Allocate array holding parameter types (java.lang.Class instances)
816 objArrayOop m = oopFactory::new_objArray(SystemDictionary::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
817 objArrayHandle mirrors(THREAD, m);
818 int index = 0;
819 // Collect parameter types
820 ResourceMark rm(THREAD);
821 Symbol* signature = method->signature();
822 SignatureStream ss(signature);
823 while (!ss.at_return_type()) {
824 oop mirror = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
825 mirrors->obj_at_put(index++, mirror);
826 ss.next();
827 }
828 assert(index == parameter_count, "invalid parameter count");
829 if (return_type != NULL) {
830 // Collect return type as well
831 assert(ss.at_return_type(), "return type should be present");
832 *return_type = get_mirror_from_signature(method, &ss, CHECK_(objArrayHandle()));
833 }
834 return mirrors;
835 }
836
837 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
838 return method->resolved_checked_exceptions(THREAD);
839 }
840
841 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
842 // Basic types
843 BasicType type = vmSymbols::signature_type(signature);
844 if (type != T_OBJECT) {
845 return Handle(THREAD, Universe::java_mirror(type));
846 }
847
848 Klass* result =
849 SystemDictionary::resolve_or_fail(signature,
850 Handle(THREAD, k->class_loader()),
851 Handle(THREAD, k->protection_domain()),
852 true, CHECK_(Handle()));
853
854 if (log_is_enabled(Debug, class, resolve)) {
855 trace_class_resolution(result);
856 }
857
858 oop nt = result->java_mirror();
859 return Handle(THREAD, nt);
860 }
861
862
863 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
864 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
865 assert(!method()->is_initializer() ||
866 (for_constant_pool_access && method()->is_static()),
867 "should call new_constructor instead");
868 InstanceKlass* holder = method->method_holder();
869 int slot = method->method_idnum();
870
871 Symbol* signature = method->signature();
872 int parameter_count = ArgumentCount(signature).size();
873 oop return_type_oop = NULL;
874 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
875 if (parameter_types.is_null() || return_type_oop == NULL) return NULL;
876
877 Handle return_type(THREAD, return_type_oop);
878
879 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
880
881 if (exception_types.is_null()) return NULL;
882
883 Symbol* method_name = method->name();
884 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
885 Handle name = Handle(THREAD, name_oop);
886 if (name == NULL) return NULL;
887
888 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
889
890 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
891
892 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
893 java_lang_reflect_Method::set_slot(mh(), slot);
894 java_lang_reflect_Method::set_name(mh(), name());
895 java_lang_reflect_Method::set_return_type(mh(), return_type());
896 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
897 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
898 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
899 java_lang_reflect_Method::set_override(mh(), false);
900 if (java_lang_reflect_Method::has_signature_field() &&
901 method->generic_signature() != NULL) {
902 Symbol* gs = method->generic_signature();
903 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
904 java_lang_reflect_Method::set_signature(mh(), sig());
905 }
906 if (java_lang_reflect_Method::has_annotations_field()) {
907 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
908 java_lang_reflect_Method::set_annotations(mh(), an_oop);
909 }
910 if (java_lang_reflect_Method::has_parameter_annotations_field()) {
911 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
912 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
913 }
914 if (java_lang_reflect_Method::has_annotation_default_field()) {
915 typeArrayOop an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
916 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
917 }
918 if (java_lang_reflect_Method::has_type_annotations_field()) {
919 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
920 java_lang_reflect_Method::set_type_annotations(mh(), an_oop);
921 }
922 return mh();
923 }
924
925
926 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
927 assert(method()->is_initializer(), "should call new_method instead");
928
929 InstanceKlass* holder = method->method_holder();
930 int slot = method->method_idnum();
931
932 Symbol* signature = method->signature();
933 int parameter_count = ArgumentCount(signature).size();
934 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, NULL, CHECK_NULL);
935 if (parameter_types.is_null()) return NULL;
936
937 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
938 if (exception_types.is_null()) return NULL;
939
940 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
941
942 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
943
944 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
945 java_lang_reflect_Constructor::set_slot(ch(), slot);
946 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
947 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
948 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
949 java_lang_reflect_Constructor::set_override(ch(), false);
950 if (java_lang_reflect_Constructor::has_signature_field() &&
951 method->generic_signature() != NULL) {
952 Symbol* gs = method->generic_signature();
953 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
954 java_lang_reflect_Constructor::set_signature(ch(), sig());
955 }
956 if (java_lang_reflect_Constructor::has_annotations_field()) {
957 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
958 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
959 }
960 if (java_lang_reflect_Constructor::has_parameter_annotations_field()) {
961 typeArrayOop an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
962 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
963 }
964 if (java_lang_reflect_Constructor::has_type_annotations_field()) {
965 typeArrayOop an_oop = Annotations::make_java_array(method->type_annotations(), CHECK_NULL);
966 java_lang_reflect_Constructor::set_type_annotations(ch(), an_oop);
967 }
968 return ch();
969 }
970
971
972 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
973 Symbol* field_name = fd->name();
974 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
975 Handle name = Handle(THREAD, name_oop);
976 Symbol* signature = fd->signature();
977 InstanceKlass* holder = fd->field_holder();
978 Handle type = new_type(signature, holder, CHECK_NULL);
979 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
980
981 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
982 java_lang_reflect_Field::set_slot(rh(), fd->index());
983 java_lang_reflect_Field::set_name(rh(), name());
984 java_lang_reflect_Field::set_type(rh(), type());
985 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
986 java_lang_reflect_Field::set_modifiers(rh(), fd->access_flags().as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
987 java_lang_reflect_Field::set_override(rh(), false);
988 if (java_lang_reflect_Field::has_signature_field() &&
989 fd->has_generic_signature()) {
990 Symbol* gs = fd->generic_signature();
991 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
992 java_lang_reflect_Field::set_signature(rh(), sig());
993 }
994 if (java_lang_reflect_Field::has_annotations_field()) {
995 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
996 java_lang_reflect_Field::set_annotations(rh(), an_oop);
997 }
998 if (java_lang_reflect_Field::has_type_annotations_field()) {
999 typeArrayOop an_oop = Annotations::make_java_array(fd->type_annotations(), CHECK_NULL);
1000 java_lang_reflect_Field::set_type_annotations(rh(), an_oop);
1001 }
1002 return rh();
1003 }
1004
1005 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
1006 int flags, TRAPS) {
1007
1008 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
1009
1010 if(NULL != sym) {
1011 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1012 java_lang_reflect_Parameter::set_name(rh(), name());
1013 } else {
1014 java_lang_reflect_Parameter::set_name(rh(), NULL);
1015 }
1016
1017 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
1018 java_lang_reflect_Parameter::set_executable(rh(), method());
1019 java_lang_reflect_Parameter::set_index(rh(), index);
1020 return rh();
1021 }
1022
1023
1024 static methodHandle resolve_interface_call(InstanceKlass* klass,
1025 const methodHandle& method,
1026 Klass* recv_klass,
1027 Handle receiver,
1028 TRAPS) {
1029
1030 assert(!method.is_null() , "method should not be null");
1031
1032 CallInfo info;
1033 Symbol* signature = method->signature();
1034 Symbol* name = method->name();
1035 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
1036 LinkInfo(klass, name, signature),
1037 true,
1038 CHECK_(methodHandle()));
1039 return info.selected_method();
1040 }
1041
1042 // Conversion
1043 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS) {
1044 assert(java_lang_Class::is_primitive(basic_type_mirror),
1045 "just checking");
1046 return java_lang_Class::primitive_type(basic_type_mirror);
1047 }
1048
1049 // Narrowing of basic types. Used to create correct jvalues for
1050 // boolean, byte, char and short return return values from interpreter
1051 // which are returned as ints. Throws IllegalArgumentException.
1052 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
1053 switch (narrow_type) {
1054 case T_BOOLEAN:
1055 value->z = (jboolean) (value->i & 1);
1056 return;
1057 case T_BYTE:
1058 value->b = (jbyte)value->i;
1059 return;
1060 case T_CHAR:
1061 value->c = (jchar)value->i;
1062 return;
1063 case T_SHORT:
1064 value->s = (jshort)value->i;
1065 return;
1066 default:
1067 break; // fail
1068 }
1069 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1070 }
1071
1072
1073 // Method call (shared by invoke_method and invoke_constructor)
1074 static oop invoke(InstanceKlass* klass,
1075 const methodHandle& reflected_method,
1076 Handle receiver,
1077 bool override,
1078 objArrayHandle ptypes,
1079 BasicType rtype,
1080 objArrayHandle args,
1081 bool is_method_invoke,
1082 TRAPS) {
1083
1084 ResourceMark rm(THREAD);
1085
1086 methodHandle method; // actual method to invoke
1087 Klass* target_klass; // target klass, receiver's klass for non-static
1088
1089 // Ensure klass is initialized
1090 klass->initialize(CHECK_NULL);
1091
1092 bool is_static = reflected_method->is_static();
1093 if (is_static) {
1094 // ignore receiver argument
1095 method = reflected_method;
1096 target_klass = klass;
1097 } else {
1098 // check for null receiver
1099 if (receiver.is_null()) {
1100 THROW_0(vmSymbols::java_lang_NullPointerException());
1101 }
1102 // Check class of receiver against class declaring method
1103 if (!receiver->is_a(klass)) {
1104 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1105 }
1106 // target klass is receiver's klass
1107 target_klass = receiver->klass();
1108 // no need to resolve if method is private or <init>
1109 if (reflected_method->is_private() || reflected_method->name() == vmSymbols::object_initializer_name()) {
1110 method = reflected_method;
1111 } else {
1112 // resolve based on the receiver
1113 if (reflected_method->method_holder()->is_interface()) {
1114 // resolve interface call
1115 //
1116 // Match resolution errors with those thrown due to reflection inlining
1117 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1118 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1119 if (HAS_PENDING_EXCEPTION) {
1120 // Method resolution threw an exception; wrap it in an InvocationTargetException
1121 oop resolution_exception = PENDING_EXCEPTION;
1122 CLEAR_PENDING_EXCEPTION;
1123 // JVMTI has already reported the pending exception
1124 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1125 if (THREAD->is_Java_thread()) {
1126 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1127 }
1128 JavaCallArguments args(Handle(THREAD, resolution_exception));
1129 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1130 vmSymbols::throwable_void_signature(),
1131 &args);
1132 }
1133 } else {
1134 // if the method can be overridden, we resolve using the vtable index.
1135 assert(!reflected_method->has_itable_index(), "");
1136 int index = reflected_method->vtable_index();
1137 method = reflected_method;
1138 if (index != Method::nonvirtual_vtable_index) {
1139 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1140 }
1141 if (!method.is_null()) {
1142 // Check for abstract methods as well
1143 if (method->is_abstract()) {
1144 // new default: 6531596
1145 ResourceMark rm(THREAD);
1146 Handle h_origexception = Exceptions::new_exception(THREAD,
1147 vmSymbols::java_lang_AbstractMethodError(),
1148 Method::name_and_sig_as_C_string(target_klass,
1149 method->name(),
1150 method->signature()));
1151 JavaCallArguments args(h_origexception);
1152 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1153 vmSymbols::throwable_void_signature(),
1154 &args);
1155 }
1156 }
1157 }
1158 }
1159 }
1160
1161 // I believe this is a ShouldNotGetHere case which requires
1162 // an internal vtable bug. If you ever get this please let Karen know.
1163 if (method.is_null()) {
1164 ResourceMark rm(THREAD);
1165 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
1166 Method::name_and_sig_as_C_string(klass,
1167 reflected_method->name(),
1168 reflected_method->signature()));
1169 }
1170
1171 assert(ptypes->is_objArray(), "just checking");
1172 int args_len = args.is_null() ? 0 : args->length();
1173 // Check number of arguments
1174 if (ptypes->length() != args_len) {
1175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1176 "wrong number of arguments");
1177 }
1178
1179 // Create object to contain parameters for the JavaCall
1180 JavaCallArguments java_args(method->size_of_parameters());
1181
1182 if (!is_static) {
1183 java_args.push_oop(receiver);
1184 }
1185
1186 for (int i = 0; i < args_len; i++) {
1187 oop type_mirror = ptypes->obj_at(i);
1188 oop arg = args->obj_at(i);
1189 if (java_lang_Class::is_primitive(type_mirror)) {
1190 jvalue value;
1191 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror, CHECK_NULL);
1192 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1193 if (ptype != atype) {
1194 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1195 }
1196 switch (ptype) {
1197 case T_BOOLEAN: java_args.push_int(value.z); break;
1198 case T_CHAR: java_args.push_int(value.c); break;
1199 case T_BYTE: java_args.push_int(value.b); break;
1200 case T_SHORT: java_args.push_int(value.s); break;
1201 case T_INT: java_args.push_int(value.i); break;
1202 case T_LONG: java_args.push_long(value.j); break;
1203 case T_FLOAT: java_args.push_float(value.f); break;
1204 case T_DOUBLE: java_args.push_double(value.d); break;
1205 default:
1206 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1207 }
1208 } else {
1209 if (arg != NULL) {
1210 Klass* k = java_lang_Class::as_Klass(type_mirror);
1211 if (!arg->is_a(k)) {
1212 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1213 "argument type mismatch");
1214 }
1215 }
1216 Handle arg_handle(THREAD, arg); // Create handle for argument
1217 java_args.push_oop(arg_handle); // Push handle
1218 }
1219 }
1220
1221 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1222 "just checking");
1223
1224 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1225 // oop (i.e., NOT as an handle)
1226 JavaValue result(rtype);
1227 JavaCalls::call(&result, method, &java_args, THREAD);
1228
1229 if (HAS_PENDING_EXCEPTION) {
1230 // Method threw an exception; wrap it in an InvocationTargetException
1231 oop target_exception = PENDING_EXCEPTION;
1232 CLEAR_PENDING_EXCEPTION;
1233 // JVMTI has already reported the pending exception
1234 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1235 if (THREAD->is_Java_thread()) {
1236 JvmtiExport::clear_detected_exception((JavaThread*)THREAD);
1237 }
1238
1239 JavaCallArguments args(Handle(THREAD, target_exception));
1240 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1241 vmSymbols::throwable_void_signature(),
1242 &args);
1243 } else {
1244 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1245 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1246 }
1247 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1248 }
1249 }
1250
1251 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1252 // of java.lang.reflect.Constructor
1253
1254 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1255 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1256 int slot = java_lang_reflect_Method::slot(method_mirror);
1257 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1258 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1259
1260 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1261 BasicType rtype;
1262 if (java_lang_Class::is_primitive(return_type_mirror)) {
1263 rtype = basic_type_mirror_to_basic_type(return_type_mirror, CHECK_NULL);
1264 } else {
1265 rtype = T_OBJECT;
1266 }
1267
1268 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1269 Method* m = klass->method_with_idnum(slot);
1270 if (m == NULL) {
1271 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1272 }
1273 methodHandle method(THREAD, m);
1274
1275 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1276 }
1277
1278
1279 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1280 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1281 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1282 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1283 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1284
1285 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1286 Method* m = klass->method_with_idnum(slot);
1287 if (m == NULL) {
1288 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1289 }
1290 methodHandle method(THREAD, m);
1291 assert(method->name() == vmSymbols::object_initializer_name(), "invalid constructor");
1292
1293 // Make sure klass gets initialize
1294 klass->initialize(CHECK_NULL);
1295
1296 // Create new instance (the receiver)
1297 klass->check_valid_for_instantiation(false, CHECK_NULL);
1298 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1299
1300 // Ignore result from call and return receiver
1301 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1302 return receiver();
1303 }