1 /*
2 * Copyright (c) 1997, 2023, 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 "cds/cdsConfig.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/moduleEntry.hpp"
29 #include "classfile/packageEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/verifier.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "jvm.h"
36 #include "logging/log.hpp"
37 #include "memory/oopFactory.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "memory/universe.hpp"
40 #include "oops/inlineKlass.inline.hpp"
41 #include "oops/instanceKlass.inline.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/objArrayKlass.hpp"
44 #include "oops/objArrayOop.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/typeArrayOop.inline.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "runtime/fieldDescriptor.inline.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/javaThread.hpp"
52 #include "runtime/reflection.hpp"
53 #include "runtime/reflectionUtils.hpp"
54 #include "runtime/signature.hpp"
55 #include "runtime/vframe.inline.hpp"
56 #include "utilities/formatBuffer.hpp"
57 #include "utilities/globalDefinitions.hpp"
58
59 static void trace_class_resolution(oop mirror) {
60 if (mirror == nullptr || java_lang_Class::is_primitive(mirror)) {
61 return;
62 }
63 Klass* to_class = java_lang_Class::as_Klass(mirror);
64 ResourceMark rm;
65 int line_number = -1;
66 const char * source_file = nullptr;
67 Klass* caller = nullptr;
68 JavaThread* jthread = JavaThread::current();
69 if (jthread->has_last_Java_frame()) {
70 vframeStream vfst(jthread);
71 // skip over any frames belonging to java.lang.Class
72 while (!vfst.at_end() &&
73 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class()) {
74 vfst.next();
75 }
76 if (!vfst.at_end()) {
77 // this frame is a likely suspect
78 caller = vfst.method()->method_holder();
79 line_number = vfst.method()->line_number_from_bci(vfst.bci());
80 Symbol* s = vfst.method()->method_holder()->source_file_name();
81 if (s != nullptr) {
82 source_file = s->as_C_string();
83 }
84 }
85 }
86 if (caller != nullptr) {
87 const char * from = caller->external_name();
88 const char * to = to_class->external_name();
89 // print in a single call to reduce interleaving between threads
90 if (source_file != nullptr) {
91 log_debug(class, resolve)("%s %s %s:%d (reflection)", from, to, source_file, line_number);
92 } else {
93 log_debug(class, resolve)("%s %s (reflection)", from, to);
94 }
95 }
96 }
97
98
99 oop Reflection::box(jvalue* value, BasicType type, TRAPS) {
100 if (type == T_VOID) {
101 return nullptr;
102 }
103 if (is_reference_type(type)) {
104 // regular objects are not boxed
105 return cast_to_oop(value->l);
106 }
107 oop result = java_lang_boxing_object::create(type, value, CHECK_NULL);
108 if (result == nullptr) {
109 THROW_(vmSymbols::java_lang_IllegalArgumentException(), result);
110 }
111 return result;
112 }
113
114
115 BasicType Reflection::unbox_for_primitive(oop box, jvalue* value, TRAPS) {
116 if (box == nullptr) {
117 THROW_(vmSymbols::java_lang_IllegalArgumentException(), T_ILLEGAL);
118 }
119 return java_lang_boxing_object::get_value(box, value);
120 }
121
122 BasicType Reflection::unbox_for_regular_object(oop box, jvalue* value) {
123 // Note: box is really the unboxed oop. It might even be a Short, etc.!
124 value->l = cast_from_oop<jobject>(box);
125 return T_OBJECT;
126 }
127
128
129 void Reflection::widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS) {
130 assert(wide_type != current_type, "widen should not be called with identical types");
131 switch (wide_type) {
132 case T_BOOLEAN:
133 case T_BYTE:
134 case T_CHAR:
135 break; // fail
136 case T_SHORT:
137 switch (current_type) {
138 case T_BYTE:
139 value->s = (jshort) value->b;
140 return;
141 default:
142 break;
143 }
144 break; // fail
145 case T_INT:
146 switch (current_type) {
147 case T_BYTE:
148 value->i = (jint) value->b;
149 return;
150 case T_CHAR:
151 value->i = (jint) value->c;
152 return;
153 case T_SHORT:
154 value->i = (jint) value->s;
155 return;
156 default:
157 break;
158 }
159 break; // fail
160 case T_LONG:
161 switch (current_type) {
162 case T_BYTE:
163 value->j = (jlong) value->b;
164 return;
165 case T_CHAR:
166 value->j = (jlong) value->c;
167 return;
168 case T_SHORT:
169 value->j = (jlong) value->s;
170 return;
171 case T_INT:
172 value->j = (jlong) value->i;
173 return;
174 default:
175 break;
176 }
177 break; // fail
178 case T_FLOAT:
179 switch (current_type) {
180 case T_BYTE:
181 value->f = (jfloat) value->b;
182 return;
183 case T_CHAR:
184 value->f = (jfloat) value->c;
185 return;
186 case T_SHORT:
187 value->f = (jfloat) value->s;
188 return;
189 case T_INT:
190 value->f = (jfloat) value->i;
191 return;
192 case T_LONG:
193 value->f = (jfloat) value->j;
194 return;
195 default:
196 break;
197 }
198 break; // fail
199 case T_DOUBLE:
200 switch (current_type) {
201 case T_BYTE:
202 value->d = (jdouble) value->b;
203 return;
204 case T_CHAR:
205 value->d = (jdouble) value->c;
206 return;
207 case T_SHORT:
208 value->d = (jdouble) value->s;
209 return;
210 case T_INT:
211 value->d = (jdouble) value->i;
212 return;
213 case T_FLOAT:
214 value->d = (jdouble) value->f;
215 return;
216 case T_LONG:
217 value->d = (jdouble) value->j;
218 return;
219 default:
220 break;
221 }
222 break; // fail
223 default:
224 break; // fail
225 }
226 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
227 }
228
229
230 BasicType Reflection::array_get(jvalue* value, arrayOop a, int index, TRAPS) {
231 if (!a->is_within_bounds(index)) {
232 THROW_(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), T_ILLEGAL);
233 }
234 if (a->is_objArray()) {
235 value->l = cast_from_oop<jobject>(objArrayOop(a)->obj_at(index));
236 return T_OBJECT;
237 } else {
238 assert(a->is_typeArray(), "just checking");
239 BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
240 switch (type) {
241 case T_BOOLEAN:
242 value->z = typeArrayOop(a)->bool_at(index);
243 break;
244 case T_CHAR:
245 value->c = typeArrayOop(a)->char_at(index);
246 break;
247 case T_FLOAT:
248 value->f = typeArrayOop(a)->float_at(index);
249 break;
250 case T_DOUBLE:
251 value->d = typeArrayOop(a)->double_at(index);
252 break;
253 case T_BYTE:
254 value->b = typeArrayOop(a)->byte_at(index);
255 break;
256 case T_SHORT:
257 value->s = typeArrayOop(a)->short_at(index);
258 break;
259 case T_INT:
260 value->i = typeArrayOop(a)->int_at(index);
261 break;
262 case T_LONG:
263 value->j = typeArrayOop(a)->long_at(index);
264 break;
265 default:
266 return T_ILLEGAL;
267 }
268 return type;
269 }
270 }
271
272
273 void Reflection::array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS) {
274 if (!a->is_within_bounds(index)) {
275 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
276 }
277
278 if (a->is_objArray()) {
279 if (value_type == T_OBJECT) {
280 oop obj = cast_to_oop(value->l);
281 if (a->is_null_free_array() && obj == nullptr) {
282 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "null-restricted array");
283 }
284
285 if (obj != nullptr) {
286 Klass* element_klass = ObjArrayKlass::cast(a->klass())->element_klass();
287 if (!obj->is_a(element_klass)) {
288 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array element type mismatch");
289 }
290 }
291 objArrayOop(a)->obj_at_put(index, obj);
292 }
293 } else {
294 assert(a->is_typeArray(), "just checking");
295 BasicType array_type = TypeArrayKlass::cast(a->klass())->element_type();
296 if (array_type != value_type) {
297 // The widen operation can potentially throw an exception, but cannot block,
298 // so typeArrayOop a is safe if the call succeeds.
299 widen(value, value_type, array_type, CHECK);
300 }
301 switch (array_type) {
302 case T_BOOLEAN:
303 typeArrayOop(a)->bool_at_put(index, value->z);
304 break;
305 case T_CHAR:
306 typeArrayOop(a)->char_at_put(index, value->c);
307 break;
308 case T_FLOAT:
309 typeArrayOop(a)->float_at_put(index, value->f);
310 break;
311 case T_DOUBLE:
312 typeArrayOop(a)->double_at_put(index, value->d);
313 break;
314 case T_BYTE:
315 typeArrayOop(a)->byte_at_put(index, value->b);
316 break;
317 case T_SHORT:
318 typeArrayOop(a)->short_at_put(index, value->s);
319 break;
320 case T_INT:
321 typeArrayOop(a)->int_at_put(index, value->i);
322 break;
323 case T_LONG:
324 typeArrayOop(a)->long_at_put(index, value->j);
325 break;
326 default:
327 THROW(vmSymbols::java_lang_IllegalArgumentException());
328 }
329 }
330 }
331
332 static Klass* basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS) {
333 assert(java_lang_Class::is_primitive(basic_type_mirror), "just checking");
334 BasicType type = java_lang_Class::primitive_type(basic_type_mirror);
335 if (type == T_VOID) {
336 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
337 }
338 else {
339 return Universe::typeArrayKlassObj(type);
340 }
341 }
342
343 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
344 if (element_mirror == nullptr) {
345 THROW_0(vmSymbols::java_lang_NullPointerException());
346 }
347 if (length < 0) {
348 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", length));
349 }
350 if (java_lang_Class::is_primitive(element_mirror)) {
351 Klass* tak = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
352 return TypeArrayKlass::cast(tak)->allocate(length, THREAD);
353 } else {
354 Klass* k = java_lang_Class::as_Klass(element_mirror);
355 if (k->is_array_klass() && ArrayKlass::cast(k)->dimension() >= MAX_DIM) {
356 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
357 }
358 return oopFactory::new_objArray(k, length, THREAD);
359 }
360 }
361
362
363 arrayOop Reflection::reflect_new_multi_array(oop element_mirror, typeArrayOop dim_array, TRAPS) {
364 assert(dim_array->is_typeArray(), "just checking");
365 assert(TypeArrayKlass::cast(dim_array->klass())->element_type() == T_INT, "just checking");
366
367 if (element_mirror == nullptr) {
368 THROW_0(vmSymbols::java_lang_NullPointerException());
369 }
370
371 int len = dim_array->length();
372 if (len <= 0 || len > MAX_DIM) {
373 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
374 }
375
376 jint dimensions[MAX_DIM]; // C array copy of intArrayOop
377 for (int i = 0; i < len; i++) {
378 int d = dim_array->int_at(i);
379 if (d < 0) {
380 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", d));
381 }
382 dimensions[i] = d;
383 }
384
385 Klass* klass;
386 int dim = len;
387 if (java_lang_Class::is_primitive(element_mirror)) {
388 klass = basic_type_mirror_to_arrayklass(element_mirror, CHECK_NULL);
389 } else {
390 klass = java_lang_Class::as_Klass(element_mirror);
391 if (klass->is_array_klass()) {
392 int k_dim = ArrayKlass::cast(klass)->dimension();
393 if (k_dim + len > MAX_DIM) {
394 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
395 }
396 dim += k_dim;
397 }
398 }
399 klass = klass->array_klass(dim, CHECK_NULL);
400 oop obj = ArrayKlass::cast(klass)->multi_allocate(len, dimensions, CHECK_NULL);
401 assert(obj->is_array(), "just checking");
402 return arrayOop(obj);
403 }
404
405
406 static bool can_relax_access_check_for(const Klass* accessor,
407 const Klass* accessee,
408 bool classloader_only) {
409
410 const InstanceKlass* accessor_ik = InstanceKlass::cast(accessor);
411 const InstanceKlass* accessee_ik = InstanceKlass::cast(accessee);
412
413 if (RelaxAccessControlCheck &&
414 accessor_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION &&
415 accessee_ik->major_version() < Verifier::NO_RELAX_ACCESS_CTRL_CHECK_VERSION) {
416 return classloader_only &&
417 Verifier::relax_access_for(accessor_ik->class_loader()) &&
418 accessor_ik->protection_domain() == accessee_ik->protection_domain() &&
419 accessor_ik->class_loader() == accessee_ik->class_loader();
420 }
421
422 return false;
423 }
424
425 /*
426 Type Accessibility check for public types: Callee Type T is accessible to Caller Type S if:
427
428 Callee T in Callee T in package PT,
429 unnamed module runtime module MT
430 ------------------------------------------------------------------------------------------------
431
432 Caller S in package If MS is loose: YES If same classloader/package (PS == PT): YES
433 PS, runtime module MS If MS can read T's If same runtime module: (MS == MT): YES
434 unnamed module: YES
435 Else if (MS can read MT (establish readability) &&
436 ((MT exports PT to MS or to all modules) ||
437 (MT is open))): YES
438
439 ------------------------------------------------------------------------------------------------
440 Caller S in unnamed YES Readability exists because unnamed module
441 module UM "reads" all modules
442 if (MT exports PT to UM or to all modules): YES
443
444 ------------------------------------------------------------------------------------------------
445
446 Note: a loose module is a module that can read all current and future unnamed modules.
447 */
448 Reflection::VerifyClassAccessResults Reflection::verify_class_access(
449 const Klass* current_class, const InstanceKlass* new_class, bool classloader_only) {
450
451 // Verify that current_class can access new_class. If the classloader_only
452 // flag is set, we automatically allow any accesses in which current_class
453 // doesn't have a classloader.
454 if ((current_class == nullptr) ||
455 (current_class == new_class) ||
456 is_same_class_package(current_class, new_class)) {
457 return ACCESS_OK;
458 }
459 // Allow all accesses from jdk/internal/reflect/SerializationConstructorAccessorImpl subclasses to
460 // succeed trivially.
461 if (vmClasses::reflect_SerializationConstructorAccessorImpl_klass_is_loaded() &&
462 current_class->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
463 return ACCESS_OK;
464 }
465
466 // module boundaries
467 if (new_class->is_public()) {
468 // Ignore modules for -Xshare:dump because we do not have any package
469 // or module information for modules other than java.base.
470 if (CDSConfig::is_dumping_static_archive()) {
471 return ACCESS_OK;
472 }
473
474 // Find the module entry for current_class, the accessor
475 ModuleEntry* module_from = current_class->module();
476 // Find the module entry for new_class, the accessee
477 ModuleEntry* module_to = new_class->module();
478
479 // both in same (possibly unnamed) module
480 if (module_from == module_to) {
481 return ACCESS_OK;
482 }
483
484 // Acceptable access to a type in an unnamed module. Note that since
485 // unnamed modules can read all unnamed modules, this also handles the
486 // case where module_from is also unnamed but in a different class loader.
487 if (!module_to->is_named() &&
488 (module_from->can_read_all_unnamed() || module_from->can_read(module_to))) {
489 return ACCESS_OK;
490 }
491
492 // Establish readability, check if module_from is allowed to read module_to.
493 if (!module_from->can_read(module_to)) {
494 return MODULE_NOT_READABLE;
495 }
496
497 // Access is allowed if module_to is open, i.e. all its packages are unqualifiedly exported
498 if (module_to->is_open()) {
499 return ACCESS_OK;
500 }
501
502 PackageEntry* package_to = new_class->package();
503 assert(package_to != nullptr, "can not obtain new_class' package");
504
505 {
506 MutexLocker m1(Module_lock);
507
508 // Once readability is established, if module_to exports T unqualifiedly,
509 // (to all modules), than whether module_from is in the unnamed module
510 // or not does not matter, access is allowed.
511 if (package_to->is_unqual_exported()) {
512 return ACCESS_OK;
513 }
514
515 // Access is allowed if both 1 & 2 hold:
516 // 1. Readability, module_from can read module_to (established above).
517 // 2. Either module_to exports T to module_from qualifiedly.
518 // or
519 // module_to exports T to all unnamed modules and module_from is unnamed.
520 // or
521 // module_to exports T unqualifiedly to all modules (checked above).
522 if (!package_to->is_qexported_to(module_from)) {
523 return TYPE_NOT_EXPORTED;
524 }
525 }
526 return ACCESS_OK;
527 }
528
529 if (can_relax_access_check_for(current_class, new_class, classloader_only)) {
530 return ACCESS_OK;
531 }
532 return OTHER_PROBLEM;
533 }
534
535 // Return an error message specific to the specified Klass*'s and result.
536 // This function must be called from within a block containing a ResourceMark.
537 char* Reflection::verify_class_access_msg(const Klass* current_class,
538 const InstanceKlass* new_class,
539 const VerifyClassAccessResults result) {
540 assert(result != ACCESS_OK, "must be failure result");
541 char * msg = nullptr;
542 if (result != OTHER_PROBLEM && new_class != nullptr && current_class != nullptr) {
543 // Find the module entry for current_class, the accessor
544 ModuleEntry* module_from = current_class->module();
545 const char * module_from_name = module_from->is_named() ? module_from->name()->as_C_string() : UNNAMED_MODULE;
546 const char * current_class_name = current_class->external_name();
547
548 // Find the module entry for new_class, the accessee
549 ModuleEntry* module_to = nullptr;
550 module_to = new_class->module();
551 const char * module_to_name = module_to->is_named() ? module_to->name()->as_C_string() : UNNAMED_MODULE;
552 const char * new_class_name = new_class->external_name();
553
554 if (result == MODULE_NOT_READABLE) {
555 assert(module_from->is_named(), "Unnamed modules can read all modules");
556 if (module_to->is_named()) {
557 size_t len = 100 + strlen(current_class_name) + 2*strlen(module_from_name) +
558 strlen(new_class_name) + 2*strlen(module_to_name);
559 msg = NEW_RESOURCE_ARRAY(char, len);
560 jio_snprintf(msg, len - 1,
561 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not read module %s",
562 current_class_name, module_from_name, new_class_name,
563 module_to_name, module_from_name, module_to_name);
564 } else {
565 oop jlm = module_to->module();
566 assert(jlm != nullptr, "Null jlm in module_to ModuleEntry");
567 intptr_t identity_hash = jlm->identity_hash();
568 size_t len = 160 + strlen(current_class_name) + 2*strlen(module_from_name) +
569 strlen(new_class_name) + 2*sizeof(uintx);
570 msg = NEW_RESOURCE_ARRAY(char, len);
571 jio_snprintf(msg, len - 1,
572 "class %s (in module %s) cannot access class %s (in unnamed module @" SIZE_FORMAT_X ") because module %s does not read unnamed module @" SIZE_FORMAT_X,
573 current_class_name, module_from_name, new_class_name, uintx(identity_hash),
574 module_from_name, uintx(identity_hash));
575 }
576
577 } else if (result == TYPE_NOT_EXPORTED) {
578 assert(new_class->package() != nullptr,
579 "Unnamed packages are always exported");
580 const char * package_name =
581 new_class->package()->name()->as_klass_external_name();
582 assert(module_to->is_named(), "Unnamed modules export all packages");
583 if (module_from->is_named()) {
584 size_t len = 118 + strlen(current_class_name) + 2*strlen(module_from_name) +
585 strlen(new_class_name) + 2*strlen(module_to_name) + strlen(package_name);
586 msg = NEW_RESOURCE_ARRAY(char, len);
587 jio_snprintf(msg, len - 1,
588 "class %s (in module %s) cannot access class %s (in module %s) because module %s does not export %s to module %s",
589 current_class_name, module_from_name, new_class_name,
590 module_to_name, module_to_name, package_name, module_from_name);
591 } else {
592 oop jlm = module_from->module();
593 assert(jlm != nullptr, "Null jlm in module_from ModuleEntry");
594 intptr_t identity_hash = jlm->identity_hash();
595 size_t len = 170 + strlen(current_class_name) + strlen(new_class_name) +
596 2*strlen(module_to_name) + strlen(package_name) + 2*sizeof(uintx);
597 msg = NEW_RESOURCE_ARRAY(char, len);
598 jio_snprintf(msg, len - 1,
599 "class %s (in unnamed module @" SIZE_FORMAT_X ") cannot access class %s (in module %s) because module %s does not export %s to unnamed module @" SIZE_FORMAT_X,
600 current_class_name, uintx(identity_hash), new_class_name, module_to_name,
601 module_to_name, package_name, uintx(identity_hash));
602 }
603 } else {
604 ShouldNotReachHere();
605 }
606 } // result != OTHER_PROBLEM...
607 return msg;
608 }
609
610 bool Reflection::verify_member_access(const Klass* current_class,
611 const Klass* resolved_class,
612 const Klass* member_class,
613 AccessFlags access,
614 bool classloader_only,
615 bool protected_restriction,
616 TRAPS) {
617 // Verify that current_class can access a member of member_class, where that
618 // field's access bits are "access". We assume that we've already verified
619 // that current_class can access member_class.
620 //
621 // If the classloader_only flag is set, we automatically allow any accesses
622 // in which current_class doesn't have a classloader.
623 //
624 // "resolved_class" is the runtime type of "member_class". Sometimes we don't
625 // need this distinction (e.g. if all we have is the runtime type, or during
626 // class file parsing when we only care about the static type); in that case
627 // callers should ensure that resolved_class == member_class.
628 //
629 if ((current_class == nullptr) ||
630 (current_class == member_class) ||
631 access.is_public()) {
632 return true;
633 }
634
635 if (current_class == member_class) {
636 return true;
637 }
638
639 if (access.is_protected()) {
640 if (!protected_restriction) {
641 // See if current_class (or outermost host class) is a subclass of member_class
642 // An interface may not access protected members of j.l.Object
643 if (!current_class->is_interface() && current_class->is_subclass_of(member_class)) {
644 if (access.is_static() || // static fields are ok, see 6622385
645 current_class == resolved_class ||
646 member_class == resolved_class ||
647 current_class->is_subclass_of(resolved_class) ||
648 resolved_class->is_subclass_of(current_class)) {
649 return true;
650 }
651 }
652 }
653 }
654
655 // package access
656 if (!access.is_private() && is_same_class_package(current_class, member_class)) {
657 return true;
658 }
659
660 // private access between different classes needs a nestmate check.
661 if (access.is_private()) {
662 if (current_class->is_instance_klass() && member_class->is_instance_klass() ) {
663 InstanceKlass* cur_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(current_class));
664 InstanceKlass* field_ik = const_cast<InstanceKlass*>(InstanceKlass::cast(member_class));
665 // Nestmate access checks may require resolution and validation of the nest-host.
666 // It is up to the caller to check for pending exceptions and handle appropriately.
667 bool access = cur_ik->has_nestmate_access_to(field_ik, CHECK_false);
668 if (access) {
669 guarantee(resolved_class->is_subclass_of(member_class), "must be!");
670 return true;
671 }
672 }
673 }
674
675 // Allow all accesses from jdk/internal/reflect/SerializationConstructorAccessorImpl subclasses to
676 // succeed trivially.
677 if (current_class->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
678 return true;
679 }
680
681 // Check for special relaxations
682 return can_relax_access_check_for(current_class, member_class, classloader_only);
683 }
684
685 bool Reflection::is_same_class_package(const Klass* class1, const Klass* class2) {
686 return InstanceKlass::cast(class1)->is_same_class_package(class2);
687 }
688
689 // Checks that the 'outer' klass has declared 'inner' as being an inner klass. If not,
690 // throw an incompatible class change exception
691 // If inner_is_member, require the inner to be a member of the outer.
692 // If !inner_is_member, require the inner to be hidden (non-member).
693 // Caller is responsible for figuring out in advance which case must be true.
694 void Reflection::check_for_inner_class(const InstanceKlass* outer, const InstanceKlass* inner,
695 bool inner_is_member, TRAPS) {
696 InnerClassesIterator iter(outer);
697 constantPoolHandle cp (THREAD, outer->constants());
698 for (; !iter.done(); iter.next()) {
699 int ioff = iter.inner_class_info_index();
700 int ooff = iter.outer_class_info_index();
701
702 if (inner_is_member && ioff != 0 && ooff != 0) {
703 if (cp->klass_name_at_matches(outer, ooff) &&
704 cp->klass_name_at_matches(inner, ioff)) {
705 Klass* o = cp->klass_at(ooff, CHECK);
706 if (o == outer) {
707 Klass* i = cp->klass_at(ioff, CHECK);
708 if (i == inner) {
709 return;
710 }
711 }
712 }
713 }
714
715 if (!inner_is_member && ioff != 0 && ooff == 0 &&
716 cp->klass_name_at_matches(inner, ioff)) {
717 Klass* i = cp->klass_at(ioff, CHECK);
718 if (i == inner) {
719 return;
720 }
721 }
722 }
723
724 // 'inner' not declared as an inner klass in outer
725 ResourceMark rm(THREAD);
726 Exceptions::fthrow(
727 THREAD_AND_LOCATION,
728 vmSymbols::java_lang_IncompatibleClassChangeError(),
729 "%s and %s disagree on InnerClasses attribute",
730 outer->external_name(),
731 inner->external_name()
732 );
733 }
734
735 static objArrayHandle get_parameter_types(const methodHandle& method,
736 int parameter_count,
737 oop* return_type,
738 TRAPS) {
739 objArrayOop m;
740 if (parameter_count == 0) {
741 // Avoid allocating an array for the empty case
742 // Still need to parse the signature for the return type below
743 m = Universe::the_empty_class_array();
744 } else {
745 // Allocate array holding parameter types (java.lang.Class instances)
746 m = oopFactory::new_objArray(vmClasses::Class_klass(), parameter_count, CHECK_(objArrayHandle()));
747 }
748 objArrayHandle mirrors(THREAD, m);
749 int index = 0;
750 // Collect parameter types
751 ResourceMark rm(THREAD);
752 for (ResolvingSignatureStream ss(method()); !ss.is_done(); ss.next()) {
753 oop mirror = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_(objArrayHandle()));
754 if (log_is_enabled(Debug, class, resolve)) {
755 trace_class_resolution(mirror);
756 }
757 if (!ss.at_return_type()) {
758 mirrors->obj_at_put(index++, mirror);
759 } else if (return_type != nullptr) {
760 // Collect return type as well
761 assert(ss.at_return_type(), "return type should be present");
762 *return_type = mirror;
763 }
764 }
765 assert(index == parameter_count, "invalid parameter count");
766 return mirrors;
767 }
768
769 static objArrayHandle get_exception_types(const methodHandle& method, TRAPS) {
770 return method->resolved_checked_exceptions(THREAD);
771 }
772
773 static Handle new_type(Symbol* signature, Klass* k, TRAPS) {
774 ResolvingSignatureStream ss(signature, k, false);
775 oop nt = ss.as_java_mirror(SignatureStream::NCDFError, CHECK_NH);
776 return Handle(THREAD, nt);
777 }
778
779 oop Reflection::new_method(const methodHandle& method, bool for_constant_pool_access, TRAPS) {
780 // Allow sun.reflect.ConstantPool to refer to <clinit> methods as java.lang.reflect.Methods.
781 assert(!method()->name()->starts_with('<') || for_constant_pool_access,
782 "should call new_constructor instead");
783 InstanceKlass* holder = method->method_holder();
784 int slot = method->method_idnum();
785
786 Symbol* signature = method->signature();
787 int parameter_count = ArgumentCount(signature).size();
788 oop return_type_oop = nullptr;
789 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, &return_type_oop, CHECK_NULL);
790 if (parameter_types.is_null() || return_type_oop == nullptr) return nullptr;
791
792 Handle return_type(THREAD, return_type_oop);
793
794 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
795 assert(!exception_types.is_null(), "cannot return null");
796
797 Symbol* method_name = method->name();
798 oop name_oop = StringTable::intern(method_name, CHECK_NULL);
799 Handle name = Handle(THREAD, name_oop);
800 if (name == nullptr) return nullptr;
801
802 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
803
804 Handle mh = java_lang_reflect_Method::create(CHECK_NULL);
805
806 java_lang_reflect_Method::set_clazz(mh(), holder->java_mirror());
807 java_lang_reflect_Method::set_slot(mh(), slot);
808 java_lang_reflect_Method::set_name(mh(), name());
809 java_lang_reflect_Method::set_return_type(mh(), return_type());
810 java_lang_reflect_Method::set_parameter_types(mh(), parameter_types());
811 java_lang_reflect_Method::set_exception_types(mh(), exception_types());
812 java_lang_reflect_Method::set_modifiers(mh(), modifiers);
813 java_lang_reflect_Method::set_override(mh(), false);
814 if (method->generic_signature() != nullptr) {
815 Symbol* gs = method->generic_signature();
816 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
817 java_lang_reflect_Method::set_signature(mh(), sig());
818 }
819 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
820 java_lang_reflect_Method::set_annotations(mh(), an_oop);
821 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
822 java_lang_reflect_Method::set_parameter_annotations(mh(), an_oop);
823 an_oop = Annotations::make_java_array(method->annotation_default(), CHECK_NULL);
824 java_lang_reflect_Method::set_annotation_default(mh(), an_oop);
825 return mh();
826 }
827
828
829 oop Reflection::new_constructor(const methodHandle& method, TRAPS) {
830 assert(method()->is_object_constructor(),
831 "should call new_method instead");
832
833 InstanceKlass* holder = method->method_holder();
834 int slot = method->method_idnum();
835
836 Symbol* signature = method->signature();
837 int parameter_count = ArgumentCount(signature).size();
838 objArrayHandle parameter_types = get_parameter_types(method, parameter_count, nullptr, CHECK_NULL);
839 if (parameter_types.is_null()) return nullptr;
840
841 objArrayHandle exception_types = get_exception_types(method, CHECK_NULL);
842 assert(!exception_types.is_null(), "cannot return null");
843
844 const int modifiers = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
845
846 Handle ch = java_lang_reflect_Constructor::create(CHECK_NULL);
847
848 java_lang_reflect_Constructor::set_clazz(ch(), holder->java_mirror());
849 java_lang_reflect_Constructor::set_slot(ch(), slot);
850 java_lang_reflect_Constructor::set_parameter_types(ch(), parameter_types());
851 java_lang_reflect_Constructor::set_exception_types(ch(), exception_types());
852 java_lang_reflect_Constructor::set_modifiers(ch(), modifiers);
853 java_lang_reflect_Constructor::set_override(ch(), false);
854 if (method->generic_signature() != nullptr) {
855 Symbol* gs = method->generic_signature();
856 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
857 java_lang_reflect_Constructor::set_signature(ch(), sig());
858 }
859 typeArrayOop an_oop = Annotations::make_java_array(method->annotations(), CHECK_NULL);
860 java_lang_reflect_Constructor::set_annotations(ch(), an_oop);
861 an_oop = Annotations::make_java_array(method->parameter_annotations(), CHECK_NULL);
862 java_lang_reflect_Constructor::set_parameter_annotations(ch(), an_oop);
863 return ch();
864 }
865
866
867 oop Reflection::new_field(fieldDescriptor* fd, TRAPS) {
868 Symbol* field_name = fd->name();
869 oop name_oop = StringTable::intern(field_name, CHECK_NULL);
870 Handle name = Handle(THREAD, name_oop);
871 Symbol* signature = fd->signature();
872 InstanceKlass* holder = fd->field_holder();
873 Handle type = new_type(signature, holder, CHECK_NULL);
874 Handle rh = java_lang_reflect_Field::create(CHECK_NULL);
875
876 java_lang_reflect_Field::set_clazz(rh(), fd->field_holder()->java_mirror());
877 java_lang_reflect_Field::set_slot(rh(), fd->index());
878 java_lang_reflect_Field::set_name(rh(), name());
879 java_lang_reflect_Field::set_type(rh(), type());
880
881 int flags = 0;
882 if (fd->is_trusted_final()) {
883 flags |= TRUSTED_FINAL;
884 }
885 if (fd->is_null_free_inline_type()) {
886 flags |= NULL_RESTRICTED;
887 }
888 java_lang_reflect_Field::set_flags(rh(), flags);
889
890 // Note the ACC_ANNOTATION bit, which is a per-class access flag, is never set here.
891 int modifiers = fd->access_flags().as_int();
892 java_lang_reflect_Field::set_modifiers(rh(), modifiers);
893 java_lang_reflect_Field::set_override(rh(), false);
894 if (fd->has_generic_signature()) {
895 Symbol* gs = fd->generic_signature();
896 Handle sig = java_lang_String::create_from_symbol(gs, CHECK_NULL);
897 java_lang_reflect_Field::set_signature(rh(), sig());
898 }
899 typeArrayOop an_oop = Annotations::make_java_array(fd->annotations(), CHECK_NULL);
900 java_lang_reflect_Field::set_annotations(rh(), an_oop);
901 return rh();
902 }
903
904 oop Reflection::new_parameter(Handle method, int index, Symbol* sym,
905 int flags, TRAPS) {
906
907 Handle rh = java_lang_reflect_Parameter::create(CHECK_NULL);
908
909 if(nullptr != sym) {
910 Handle name = java_lang_String::create_from_symbol(sym, CHECK_NULL);
911 java_lang_reflect_Parameter::set_name(rh(), name());
912 } else {
913 java_lang_reflect_Parameter::set_name(rh(), nullptr);
914 }
915
916 java_lang_reflect_Parameter::set_modifiers(rh(), flags);
917 java_lang_reflect_Parameter::set_executable(rh(), method());
918 java_lang_reflect_Parameter::set_index(rh(), index);
919 return rh();
920 }
921
922
923 static methodHandle resolve_interface_call(InstanceKlass* klass,
924 const methodHandle& method,
925 Klass* recv_klass,
926 Handle receiver,
927 TRAPS) {
928
929 assert(!method.is_null() , "method should not be null");
930
931 CallInfo info;
932 Symbol* signature = method->signature();
933 Symbol* name = method->name();
934 LinkResolver::resolve_interface_call(info, receiver, recv_klass,
935 LinkInfo(klass, name, signature),
936 true,
937 CHECK_(methodHandle()));
938 return methodHandle(THREAD, info.selected_method());
939 }
940
941 // Conversion
942 static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror) {
943 assert(java_lang_Class::is_primitive(basic_type_mirror),
944 "just checking");
945 return java_lang_Class::primitive_type(basic_type_mirror);
946 }
947
948 // Narrowing of basic types. Used to create correct jvalues for
949 // boolean, byte, char and short return return values from interpreter
950 // which are returned as ints. Throws IllegalArgumentException.
951 static void narrow(jvalue* value, BasicType narrow_type, TRAPS) {
952 switch (narrow_type) {
953 case T_BOOLEAN:
954 value->z = (jboolean) (value->i & 1);
955 return;
956 case T_BYTE:
957 value->b = (jbyte)value->i;
958 return;
959 case T_CHAR:
960 value->c = (jchar)value->i;
961 return;
962 case T_SHORT:
963 value->s = (jshort)value->i;
964 return;
965 default:
966 break; // fail
967 }
968 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
969 }
970
971
972 // Method call (shared by invoke_method and invoke_constructor)
973 static oop invoke(InstanceKlass* klass,
974 const methodHandle& reflected_method,
975 Handle receiver,
976 bool override,
977 objArrayHandle ptypes,
978 BasicType rtype,
979 objArrayHandle args,
980 bool is_method_invoke,
981 TRAPS) {
982
983 ResourceMark rm(THREAD);
984
985 methodHandle method; // actual method to invoke
986 Klass* target_klass; // target klass, receiver's klass for non-static
987
988 // Ensure klass is initialized
989 klass->initialize(CHECK_NULL);
990
991 bool is_static = reflected_method->is_static();
992 if (is_static) {
993 // ignore receiver argument
994 method = reflected_method;
995 target_klass = klass;
996 } else {
997 // check for null receiver
998 if (receiver.is_null()) {
999 THROW_0(vmSymbols::java_lang_NullPointerException());
1000 }
1001 // Check class of receiver against class declaring method
1002 if (!receiver->is_a(klass)) {
1003 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "object is not an instance of declaring class");
1004 }
1005 // target klass is receiver's klass
1006 target_klass = receiver->klass();
1007 // no need to resolve if method is private or <init>
1008 if (reflected_method->is_private() ||
1009 reflected_method->name() == vmSymbols::object_initializer_name()) {
1010 method = reflected_method;
1011 } else {
1012 // resolve based on the receiver
1013 if (reflected_method->method_holder()->is_interface()) {
1014 // resolve interface call
1015 //
1016 // Match resolution errors with those thrown due to reflection inlining
1017 // Linktime resolution & IllegalAccessCheck already done by Class.getMethod()
1018 method = resolve_interface_call(klass, reflected_method, target_klass, receiver, THREAD);
1019 if (HAS_PENDING_EXCEPTION) {
1020 // Method resolution threw an exception; wrap it in an InvocationTargetException
1021 oop resolution_exception = PENDING_EXCEPTION;
1022 CLEAR_PENDING_EXCEPTION;
1023 // JVMTI has already reported the pending exception
1024 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1025 JvmtiExport::clear_detected_exception(THREAD);
1026 JavaCallArguments args(Handle(THREAD, resolution_exception));
1027 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1028 vmSymbols::throwable_void_signature(),
1029 &args);
1030 }
1031 } else {
1032 // if the method can be overridden, we resolve using the vtable index.
1033 assert(!reflected_method->has_itable_index(), "");
1034 int index = reflected_method->vtable_index();
1035 method = reflected_method;
1036 if (index != Method::nonvirtual_vtable_index) {
1037 method = methodHandle(THREAD, target_klass->method_at_vtable(index));
1038 }
1039 if (!method.is_null()) {
1040 // Check for abstract methods as well
1041 if (method->is_abstract()) {
1042 // new default: 6531596
1043 ResourceMark rm(THREAD);
1044 stringStream ss;
1045 ss.print("'");
1046 Method::print_external_name(&ss, target_klass, method->name(), method->signature());
1047 ss.print("'");
1048 Handle h_origexception = Exceptions::new_exception(THREAD,
1049 vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
1050 JavaCallArguments args(h_origexception);
1051 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1052 vmSymbols::throwable_void_signature(),
1053 &args);
1054 }
1055 }
1056 }
1057 }
1058 }
1059
1060 // I believe this is a ShouldNotGetHere case which requires
1061 // an internal vtable bug. If you ever get this please let Karen know.
1062 if (method.is_null()) {
1063 ResourceMark rm(THREAD);
1064 stringStream ss;
1065 ss.print("'");
1066 Method::print_external_name(&ss, klass,
1067 reflected_method->name(),
1068 reflected_method->signature());
1069 ss.print("'");
1070 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
1071 }
1072
1073 assert(ptypes->is_objArray(), "just checking");
1074 int args_len = args.is_null() ? 0 : args->length();
1075 // Check number of arguments
1076 if (ptypes->length() != args_len) {
1077 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1078 "wrong number of arguments");
1079 }
1080
1081 // Create object to contain parameters for the JavaCall
1082 JavaCallArguments java_args(method->size_of_parameters());
1083
1084 if (!is_static) {
1085 java_args.push_oop(receiver);
1086 }
1087
1088 for (int i = 0; i < args_len; i++) {
1089 oop type_mirror = ptypes->obj_at(i);
1090 oop arg = args->obj_at(i);
1091 if (java_lang_Class::is_primitive(type_mirror)) {
1092 jvalue value;
1093 BasicType ptype = basic_type_mirror_to_basic_type(type_mirror);
1094 BasicType atype = Reflection::unbox_for_primitive(arg, &value, CHECK_NULL);
1095 if (ptype != atype) {
1096 Reflection::widen(&value, atype, ptype, CHECK_NULL);
1097 }
1098 switch (ptype) {
1099 case T_BOOLEAN: java_args.push_int(value.z); break;
1100 case T_CHAR: java_args.push_int(value.c); break;
1101 case T_BYTE: java_args.push_int(value.b); break;
1102 case T_SHORT: java_args.push_int(value.s); break;
1103 case T_INT: java_args.push_int(value.i); break;
1104 case T_LONG: java_args.push_long(value.j); break;
1105 case T_FLOAT: java_args.push_float(value.f); break;
1106 case T_DOUBLE: java_args.push_double(value.d); break;
1107 default:
1108 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "argument type mismatch");
1109 }
1110 } else {
1111 if (arg != nullptr) {
1112 Klass* k = java_lang_Class::as_Klass(type_mirror);
1113 if (!arg->is_a(k)) {
1114 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1115 "argument type mismatch");
1116 }
1117 }
1118 Handle arg_handle(THREAD, arg); // Create handle for argument
1119 java_args.push_oop(arg_handle); // Push handle
1120 }
1121 }
1122
1123 assert(java_args.size_of_parameters() == method->size_of_parameters(),
1124 "just checking");
1125
1126 // All oops (including receiver) is passed in as Handles. An potential oop is returned as an
1127 // oop (i.e., NOT as an handle)
1128 JavaValue result(rtype);
1129 JavaCalls::call(&result, method, &java_args, THREAD);
1130
1131 if (HAS_PENDING_EXCEPTION) {
1132 // Method threw an exception; wrap it in an InvocationTargetException
1133 oop target_exception = PENDING_EXCEPTION;
1134 CLEAR_PENDING_EXCEPTION;
1135 // JVMTI has already reported the pending exception
1136 // JVMTI internal flag reset is needed in order to report InvocationTargetException
1137 JvmtiExport::clear_detected_exception(THREAD);
1138
1139 JavaCallArguments args(Handle(THREAD, target_exception));
1140 THROW_ARG_0(vmSymbols::java_lang_reflect_InvocationTargetException(),
1141 vmSymbols::throwable_void_signature(),
1142 &args);
1143 } else {
1144 if (rtype == T_BOOLEAN || rtype == T_BYTE || rtype == T_CHAR || rtype == T_SHORT) {
1145 narrow((jvalue*)result.get_value_addr(), rtype, CHECK_NULL);
1146 }
1147 return Reflection::box((jvalue*)result.get_value_addr(), rtype, THREAD);
1148 }
1149 }
1150
1151 // This would be nicer if, say, java.lang.reflect.Method was a subclass
1152 // of java.lang.reflect.Constructor
1153
1154 oop Reflection::invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS) {
1155 oop mirror = java_lang_reflect_Method::clazz(method_mirror);
1156 int slot = java_lang_reflect_Method::slot(method_mirror);
1157 bool override = java_lang_reflect_Method::override(method_mirror) != 0;
1158 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Method::parameter_types(method_mirror)));
1159
1160 oop return_type_mirror = java_lang_reflect_Method::return_type(method_mirror);
1161 BasicType rtype;
1162 if (java_lang_Class::is_primitive(return_type_mirror)) {
1163 rtype = basic_type_mirror_to_basic_type(return_type_mirror);
1164 } else {
1165 rtype = T_OBJECT;
1166 }
1167
1168 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1169 Method* m = klass->method_with_idnum(slot);
1170 if (m == nullptr) {
1171 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1172 }
1173 methodHandle method(THREAD, m);
1174
1175 return invoke(klass, method, receiver, override, ptypes, rtype, args, true, THREAD);
1176 }
1177
1178
1179 oop Reflection::invoke_constructor(oop constructor_mirror, objArrayHandle args, TRAPS) {
1180 oop mirror = java_lang_reflect_Constructor::clazz(constructor_mirror);
1181 int slot = java_lang_reflect_Constructor::slot(constructor_mirror);
1182 bool override = java_lang_reflect_Constructor::override(constructor_mirror) != 0;
1183 objArrayHandle ptypes(THREAD, objArrayOop(java_lang_reflect_Constructor::parameter_types(constructor_mirror)));
1184
1185 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1186 Method* m = klass->method_with_idnum(slot);
1187 if (m == nullptr) {
1188 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "invoke");
1189 }
1190 methodHandle method(THREAD, m);
1191
1192 // Make sure klass gets initialize
1193 klass->initialize(CHECK_NULL);
1194
1195 // Create new instance (the receiver)
1196 klass->check_valid_for_instantiation(false, CHECK_NULL);
1197 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
1198
1199 // Ignore result from call and return receiver
1200 invoke(klass, method, receiver, override, ptypes, T_VOID, args, false, CHECK_NULL);
1201 return receiver();
1202 }