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