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