1 /*
   2  * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2024 Red Hat, Inc.
   4  * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
   5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   6  *
   7  * This code is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 only, as
   9  * published by the Free Software Foundation.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  *
  25  */
  26 
  27 #include "precompiled.hpp"
  28 #include "ci/ciReplay.hpp"
  29 #include "classfile/altHashing.hpp"
  30 #include "classfile/classFileStream.hpp"
  31 #include "classfile/classLoader.hpp"
  32 #include "classfile/classLoadInfo.hpp"
  33 #include "classfile/javaClasses.hpp"
  34 #include "classfile/javaClasses.inline.hpp"
  35 #include "classfile/javaThreadStatus.hpp"
  36 #include "classfile/moduleEntry.hpp"
  37 #include "classfile/modules.hpp"
  38 #include "classfile/symbolTable.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmClasses.hpp"
  41 #include "classfile/vmSymbols.hpp"
  42 #include "compiler/compiler_globals.hpp"
  43 #include "gc/shared/collectedHeap.hpp"
  44 #include "gc/shared/gcLocker.inline.hpp"
  45 #include "gc/shared/stringdedup/stringDedup.hpp"
  46 #include "interpreter/linkResolver.hpp"
  47 #include "jni.h"
  48 #include "jvm.h"
  49 #include "logging/log.hpp"
  50 #include "memory/allocation.hpp"
  51 #include "memory/allocation.inline.hpp"
  52 #include "memory/oopFactory.hpp"
  53 #include "memory/resourceArea.hpp"
  54 #include "memory/universe.hpp"
  55 #include "nmt/memTracker.hpp"
  56 #include "oops/access.inline.hpp"
  57 #include "oops/arrayOop.hpp"
  58 #include "oops/instanceKlass.inline.hpp"
  59 #include "oops/instanceOop.hpp"
  60 #include "oops/klass.inline.hpp"
  61 #include "oops/markWord.hpp"
  62 #include "oops/method.hpp"
  63 #include "oops/objArrayKlass.hpp"
  64 #include "oops/objArrayOop.inline.hpp"
  65 #include "oops/oop.inline.hpp"
  66 #include "oops/symbol.hpp"
  67 #include "oops/typeArrayKlass.hpp"
  68 #include "oops/typeArrayOop.inline.hpp"
  69 #include "prims/jniCheck.hpp"
  70 #include "prims/jniExport.hpp"
  71 #include "prims/jniFastGetField.hpp"
  72 #include "prims/jvm_misc.hpp"
  73 #include "prims/jvmtiExport.hpp"
  74 #include "prims/jvmtiThreadState.hpp"
  75 #include "runtime/arguments.hpp"
  76 #include "runtime/atomic.hpp"
  77 #include "runtime/fieldDescriptor.inline.hpp"
  78 #include "runtime/handles.inline.hpp"
  79 #include "runtime/interfaceSupport.inline.hpp"
  80 #include "runtime/java.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.inline.hpp"
  83 #include "runtime/jfieldIDWorkaround.hpp"
  84 #include "runtime/jniHandles.inline.hpp"
  85 #include "runtime/reflection.hpp"
  86 #include "runtime/safepointVerifiers.hpp"
  87 #include "runtime/sharedRuntime.hpp"
  88 #include "runtime/signature.hpp"
  89 #include "runtime/synchronizer.hpp"
  90 #include "runtime/thread.inline.hpp"
  91 #include "runtime/vmOperations.hpp"
  92 #include "services/runtimeService.hpp"
  93 #include "utilities/defaultStream.hpp"
  94 #include "utilities/dtrace.hpp"
  95 #include "utilities/events.hpp"
  96 #include "utilities/macros.hpp"
  97 #include "utilities/vmError.hpp"
  98 #if INCLUDE_JVMCI
  99 #include "jvmci/jvmciCompiler.hpp"
 100 #endif
 101 #if INCLUDE_JFR
 102 #include "jfr/jfr.hpp"
 103 #endif
 104 
 105 static jint CurrentVersion = JNI_VERSION_24;
 106 
 107 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
 108 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
 109 #endif
 110 
 111 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
 112 // '-return' probe regardless of the return path is taken out of the function.
 113 // Methods that have multiple return paths use this to avoid having to
 114 // instrument each return path.  Methods that use CHECK or THROW must use this
 115 // since those macros can cause an immediate uninstrumented return.
 116 //
 117 // In order to get the return value, a reference to the variable containing
 118 // the return value must be passed to the constructor of the object, and
 119 // the return value must be set before return (since the mark object has
 120 // a reference to it).
 121 //
 122 // Example:
 123 // DT_RETURN_MARK_DECL(SomeFunc, int);
 124 // JNI_ENTRY(int, SomeFunc, ...)
 125 //   int return_value = 0;
 126 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 127 //   foo(CHECK_0)
 128 //   return_value = 5;
 129 //   return return_value;
 130 // JNI_END
 131 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 132   DTRACE_ONLY(                                                             \
 133     class DTraceReturnProbeMark_##name {                                   \
 134      public:                                                               \
 135       const type& _ret_ref;                                                \
 136       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 137       ~DTraceReturnProbeMark_##name() {                                    \
 138         probe;                                                             \
 139       }                                                                    \
 140     }                                                                      \
 141   )
 142 // Void functions are simpler since there's no return value
 143 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 144   DTRACE_ONLY(                                                             \
 145     class DTraceReturnProbeMark_##name {                                   \
 146      public:                                                               \
 147       ~DTraceReturnProbeMark_##name() {                                    \
 148         probe;                                                             \
 149       }                                                                    \
 150     }                                                                      \
 151   )
 152 
 153 // Place these macros in the function to mark the return.  Non-void
 154 // functions need the type and address of the return value.
 155 #define DT_RETURN_MARK(name, type, ref) \
 156   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 157 #define DT_VOID_RETURN_MARK(name) \
 158   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 159 
 160 
 161 // Use these to select distinct code for floating-point vs. non-floating point
 162 // situations.  Used from within common macros where we need slightly
 163 // different behavior for Float/Double
 164 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 165 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 166 #define FP_SELECT_Char(intcode, fpcode)    intcode
 167 #define FP_SELECT_Short(intcode, fpcode)   intcode
 168 #define FP_SELECT_Object(intcode, fpcode)  intcode
 169 #define FP_SELECT_Int(intcode, fpcode)     intcode
 170 #define FP_SELECT_Long(intcode, fpcode)    intcode
 171 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 172 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 173 #define FP_SELECT(TypeName, intcode, fpcode) \
 174   FP_SELECT_##TypeName(intcode, fpcode)
 175 
 176 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 177 // (dtrace doesn't do FP yet)
 178 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 179   FP_SELECT(TypeName, \
 180     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 181 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 182   FP_SELECT(TypeName, \
 183     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 184 
 185 
 186 // out-of-line helpers for class jfieldIDWorkaround:
 187 
 188 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 189   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 190     uintptr_t as_uint = (uintptr_t) id;
 191     int offset = raw_instance_offset(id);
 192     if (is_checked_jfieldID(id)) {
 193       if (!klass_hash_ok(k, id)) {
 194         return false;
 195       }
 196     }
 197     return InstanceKlass::cast(k)->contains_field_offset(offset);
 198   } else {
 199     JNIid* result = (JNIid*) id;
 200 #ifdef ASSERT
 201     return result != nullptr && result->is_static_field_id();
 202 #else
 203     return result != nullptr;
 204 #endif
 205   }
 206 }
 207 
 208 
 209 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
 210   if (offset <= small_offset_mask) {
 211     Klass* field_klass = k;
 212     Klass* super_klass = field_klass->super();
 213     // With compressed oops the most super class with nonstatic fields would
 214     // be the owner of fields embedded in the header.
 215     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 216            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 217       field_klass = super_klass;   // super contains the field also
 218       super_klass = field_klass->super();
 219     }
 220     debug_only(NoSafepointVerifier nosafepoint;)
 221     uintptr_t klass_hash = field_klass->identity_hash();
 222     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 223   } else {
 224 #if 0
 225     #ifndef PRODUCT
 226     {
 227       ResourceMark rm;
 228       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 229     }
 230     #endif
 231 #endif
 232     return 0;
 233   }
 234 }
 235 
 236 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 237   uintptr_t as_uint = (uintptr_t) id;
 238   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 239   do {
 240     debug_only(NoSafepointVerifier nosafepoint;)
 241     // Could use a non-blocking query for identity_hash here...
 242     if ((k->identity_hash() & klass_mask) == klass_hash)
 243       return true;
 244     k = k->super();
 245   } while (k != nullptr);
 246   return false;
 247 }
 248 
 249 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 250   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 251   uintptr_t as_uint = (uintptr_t) id;
 252   int offset = raw_instance_offset(id);
 253   if (VerifyJNIFields) {
 254     if (is_checked_jfieldID(id)) {
 255       guarantee(klass_hash_ok(k, id),
 256     "Bug in native code: jfieldID class must match object");
 257     } else {
 258 #if 0
 259       #ifndef PRODUCT
 260       if (Verbose) {
 261   ResourceMark rm;
 262   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 263       }
 264       #endif
 265 #endif
 266     }
 267   }
 268   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 269       "Bug in native code: jfieldID offset must address interior of object");
 270 }
 271 
 272 // Implementation of JNI entries
 273 
 274 DT_RETURN_MARK_DECL(DefineClass, jclass
 275                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 276 
 277 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 278                                   const jbyte *buf, jsize bufLen))
 279   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 280     env, (char*) name, loaderRef, (char*) buf, bufLen);
 281 
 282   jclass cls = nullptr;
 283   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 284 
 285   // Class resolution will get the class name from the .class stream if the name is null.
 286   TempNewSymbol class_name = name == nullptr ? nullptr :
 287     SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
 288                                         CHECK_NULL);
 289 
 290   ResourceMark rm(THREAD);
 291   ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify);
 292   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 293   Handle protection_domain;
 294   ClassLoadInfo cl_info(protection_domain);
 295   Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
 296                                                    class_loader,
 297                                                    cl_info,
 298                                                    CHECK_NULL);
 299 
 300   if (log_is_enabled(Debug, class, resolve)) {
 301     trace_class_resolution(k);
 302   }
 303 
 304   cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
 305   return cls;
 306 JNI_END
 307 
 308 
 309 
 310 DT_RETURN_MARK_DECL(FindClass, jclass
 311                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 312 
 313 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 314   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 315 
 316   jclass result = nullptr;
 317   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 318 
 319   // This should be ClassNotFoundException imo.
 320   TempNewSymbol class_name =
 321     SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
 322                                         CHECK_NULL);
 323 
 324   //%note jni_3
 325   Handle protection_domain;
 326   // Find calling class
 327   Klass* k = thread->security_get_caller_class(0);
 328   // default to the system loader when no context
 329   Handle loader(THREAD, SystemDictionary::java_system_loader());
 330   if (k != nullptr) {
 331     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 332     // in the correct class context.
 333     if (k->class_loader() == nullptr &&
 334         k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
 335       JavaValue result(T_OBJECT);
 336       JavaCalls::call_static(&result, k,
 337                              vmSymbols::getFromClass_name(),
 338                              vmSymbols::void_class_signature(),
 339                              CHECK_NULL);
 340       // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
 341       // a non-null Class object.  When invoked from JNI_OnUnload,
 342       // it will return null to indicate no context.
 343       oop mirror = result.get_oop();
 344       if (mirror != nullptr) {
 345         Klass* fromClass = java_lang_Class::as_Klass(mirror);
 346         loader = Handle(THREAD, fromClass->class_loader());
 347         protection_domain = Handle(THREAD, fromClass->protection_domain());
 348       }
 349     } else {
 350       loader = Handle(THREAD, k->class_loader());
 351     }
 352   }
 353 
 354   result = find_class_from_class_loader(env, class_name, true, loader,
 355                                         protection_domain, true, thread);
 356 
 357   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
 358     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 359   }
 360 
 361   return result;
 362 JNI_END
 363 
 364 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 365                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 366 
 367 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 368   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 369 
 370   jmethodID ret = nullptr;
 371   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 372 
 373   // method is a handle to a java.lang.reflect.Method object
 374   oop reflected  = JNIHandles::resolve_non_null(method);
 375   oop mirror     = nullptr;
 376   int slot       = 0;
 377 
 378   if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
 379     mirror = java_lang_reflect_Constructor::clazz(reflected);
 380     slot   = java_lang_reflect_Constructor::slot(reflected);
 381   } else {
 382     assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
 383     mirror = java_lang_reflect_Method::clazz(reflected);
 384     slot   = java_lang_reflect_Method::slot(reflected);
 385   }
 386   Klass* k1 = java_lang_Class::as_Klass(mirror);
 387 
 388   // Make sure class is initialized before handing id's out to methods
 389   k1->initialize(CHECK_NULL);
 390   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 391   ret = m==nullptr? nullptr : m->jmethod_id();  // return null if reflected method deleted
 392   return ret;
 393 JNI_END
 394 
 395 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 396                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 397 
 398 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 399   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 400 
 401   jfieldID ret = nullptr;
 402   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 403 
 404   // field is a handle to a java.lang.reflect.Field object
 405   oop reflected   = JNIHandles::resolve_non_null(field);
 406   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 407   Klass* k1       = java_lang_Class::as_Klass(mirror);
 408   int slot        = java_lang_reflect_Field::slot(reflected);
 409   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 410 
 411   // Make sure class is initialized before handing id's out to fields
 412   k1->initialize(CHECK_NULL);
 413 
 414   // First check if this is a static field
 415   if (modifiers & JVM_ACC_STATIC) {
 416     int offset = InstanceKlass::cast(k1)->field_offset( slot );
 417     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 418     assert(id != nullptr, "corrupt Field object");
 419     debug_only(id->set_is_static_field_id();)
 420     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 421     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 422     return ret;
 423   }
 424 
 425   // The slot is the index of the field description in the field-array
 426   // The jfieldID is the offset of the field within the object
 427   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 428   int offset = InstanceKlass::cast(k1)->field_offset( slot );
 429   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 430   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
 431   return ret;
 432 JNI_END
 433 
 434 
 435 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 436                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 437 
 438 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 439   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 440 
 441   jobject ret = nullptr;
 442   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 443 
 444   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 445   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 446   oop reflection_method;
 447   if (m->is_object_initializer()) {
 448     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 449   } else {
 450     // Note: Static initializers can theoretically be here, if JNI users manage
 451     // to get their jmethodID. Record them as plain methods.
 452     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 453   }
 454   ret = JNIHandles::make_local(THREAD, reflection_method);
 455   return ret;
 456 JNI_END
 457 
 458 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 459                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 460 
 461 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 462   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 463 
 464   jclass obj = nullptr;
 465   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 466 
 467   oop mirror = JNIHandles::resolve_non_null(sub);
 468   // primitive classes return null
 469   if (java_lang_Class::is_primitive(mirror)) return nullptr;
 470 
 471   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 472   // arrays return Object
 473   // interfaces return null
 474   // proper classes return Klass::super()
 475   Klass* k = java_lang_Class::as_Klass(mirror);
 476   if (k->is_interface()) return nullptr;
 477 
 478   // return mirror for superclass
 479   Klass* super = k->java_super();
 480   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 481   debug_only(Klass* super2 = ( k->is_array_klass()
 482                                  ? vmClasses::Object_klass()
 483                                  : k->super() ) );
 484   assert(super == super2,
 485          "java_super computation depends on interface, array, other super");
 486   obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
 487   return obj;
 488 JNI_END
 489 
 490 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 491   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 492 
 493   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 494   oop super_mirror = JNIHandles::resolve_non_null(super);
 495   if (java_lang_Class::is_primitive(sub_mirror) ||
 496       java_lang_Class::is_primitive(super_mirror)) {
 497     jboolean ret = (sub_mirror == super_mirror);
 498 
 499     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 500     return ret;
 501   }
 502   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 503   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 504   assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
 505   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 506                    JNI_TRUE : JNI_FALSE;
 507 
 508   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 509   return ret;
 510 JNI_END
 511 
 512 
 513 DT_RETURN_MARK_DECL(Throw, jint
 514                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 515 
 516 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 517   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 518 
 519   jint ret = JNI_OK;
 520   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 521 
 522   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 523   ShouldNotReachHere();
 524   return 0;  // Mute compiler.
 525 JNI_END
 526 
 527 
 528 DT_RETURN_MARK_DECL(ThrowNew, jint
 529                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 530 
 531 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 532   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 533 
 534   jint ret = JNI_OK;
 535   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 536 
 537   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 538   Symbol*  name = k->name();
 539   Handle class_loader (THREAD,  k->class_loader());
 540   Handle protection_domain (THREAD, k->protection_domain());
 541   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 542   ShouldNotReachHere();
 543   return 0;  // Mute compiler.
 544 JNI_END
 545 
 546 
 547 // JNI functions only transform a pending async exception to a synchronous
 548 // exception in ExceptionOccurred and ExceptionCheck calls, since
 549 // delivering an async exception in other places won't change the native
 550 // code's control flow and would be harmful when native code further calls
 551 // JNI functions with a pending exception. Async exception is also checked
 552 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 553 // false but deliver the async exception at the very end during
 554 // state transition.
 555 
 556 static void jni_check_async_exceptions(JavaThread *thread) {
 557   assert(thread == Thread::current(), "must be itself");
 558   if (thread->has_async_exception_condition()) {
 559     SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
 560   }
 561 }
 562 
 563 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 564   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 565 
 566   jni_check_async_exceptions(thread);
 567   oop exception = thread->pending_exception();
 568   jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
 569 
 570   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 571   return ret;
 572 JNI_END
 573 
 574 
 575 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 576   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 577 
 578   if (thread->has_pending_exception()) {
 579     Handle ex(thread, thread->pending_exception());
 580     thread->clear_pending_exception();
 581     jio_fprintf(defaultStream::error_stream(), "Exception ");
 582     if (thread != nullptr && thread->threadObj() != nullptr) {
 583       ResourceMark rm(THREAD);
 584       jio_fprintf(defaultStream::error_stream(),
 585                   "in thread \"%s\" ", thread->name());
 586     }
 587     if (ex->is_a(vmClasses::Throwable_klass())) {
 588       JavaValue result(T_VOID);
 589       JavaCalls::call_virtual(&result,
 590                               ex,
 591                               vmClasses::Throwable_klass(),
 592                               vmSymbols::printStackTrace_name(),
 593                               vmSymbols::void_method_signature(),
 594                               THREAD);
 595       // If an exception is thrown in the call it gets thrown away. Not much
 596       // we can do with it. The native code that calls this, does not check
 597       // for the exception - hence, it might still be in the thread when DestroyVM gets
 598       // called, potentially causing a few asserts to trigger - since no pending exception
 599       // is expected.
 600       CLEAR_PENDING_EXCEPTION;
 601     } else {
 602       ResourceMark rm(THREAD);
 603       jio_fprintf(defaultStream::error_stream(),
 604                   ". Uncaught exception of type %s.",
 605                   ex->klass()->external_name());
 606     }
 607   }
 608 
 609   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 610 JNI_END
 611 
 612 
 613 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
 614   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 615 
 616   // The jni code might be using this API to clear java thrown exception.
 617   // So just mark jvmti thread exception state as exception caught.
 618   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 619   if (state != nullptr && state->is_exception_detected()) {
 620     state->set_exception_caught();
 621   }
 622   thread->clear_pending_exception();
 623 
 624   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 625 JNI_END
 626 
 627 
 628 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 629   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 630 
 631   tty->print_cr("FATAL ERROR in native method: %s", msg);
 632   thread->print_jni_stack();
 633   os::abort(); // Dump core and abort
 634 JNI_END
 635 
 636 
 637 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 638   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 639 
 640   //%note jni_11
 641   if (capacity < 0 ||
 642       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 643     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 644     return JNI_ERR;
 645   }
 646 
 647   thread->push_jni_handle_block();
 648   jint ret = JNI_OK;
 649   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 650   return ret;
 651 JNI_END
 652 
 653 
 654 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 655   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 656 
 657   //%note jni_11
 658   Handle result_handle(thread, JNIHandles::resolve(result));
 659   JNIHandleBlock* old_handles = thread->active_handles();
 660   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 661   if (new_handles != nullptr) {
 662     // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
 663     // This way code will still work if PopLocalFrame is called without a corresponding
 664     // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
 665     // the release_block call will release the blocks.
 666     thread->set_active_handles(new_handles);
 667     old_handles->set_pop_frame_link(nullptr);              // clear link we won't release new_handles below
 668     JNIHandleBlock::release_block(old_handles, thread); // may block
 669     result = JNIHandles::make_local(thread, result_handle());
 670   }
 671   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 672   return result;
 673 JNI_END
 674 
 675 
 676 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 677   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 678 
 679   Handle ref_handle(thread, JNIHandles::resolve(ref));
 680   jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
 681 
 682   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 683   return ret;
 684 JNI_END
 685 
 686 // Must be JNI_ENTRY (with HandleMark)
 687 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 688   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 689 
 690   JNIHandles::destroy_global(ref);
 691 
 692   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 693 JNI_END
 694 
 695 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 696   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 697 
 698   JNIHandles::destroy_local(obj);
 699 
 700   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 701 JNI_END
 702 
 703 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 704   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 705 
 706   jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
 707 
 708   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 709   return ret;
 710 JNI_END
 711 
 712 
 713 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 714   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 715 
 716   jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
 717                                        AllocFailStrategy::RETURN_NULL);
 718 
 719   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 720   return ret;
 721 JNI_END
 722 
 723 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 724   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 725 
 726   jint ret;
 727   if (capacity >= 0 &&
 728       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 729     ret = JNI_OK;
 730   } else {
 731     ret = JNI_ERR;
 732   }
 733 
 734   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 735   return ret;
 736 JNI_END
 737 
 738 // Return the Handle Type
 739 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 740   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 741 
 742   jobjectRefType ret = JNIInvalidRefType;
 743   if (obj != nullptr) {
 744     ret = JNIHandles::handle_type(thread, obj);
 745   }
 746 
 747   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 748   return ret;
 749 JNI_END
 750 
 751 
 752 class JNI_ArgumentPusher : public SignatureIterator {
 753  protected:
 754   JavaCallArguments*  _arguments;
 755 
 756   void push_int(jint x)         { _arguments->push_int(x); }
 757   void push_long(jlong x)       { _arguments->push_long(x); }
 758   void push_float(jfloat x)     { _arguments->push_float(x); }
 759   void push_double(jdouble x)   { _arguments->push_double(x); }
 760   void push_object(jobject x)   { _arguments->push_jobject(x); }
 761 
 762   void push_boolean(jboolean b) {
 763     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 764     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 765     // TemplateInterpreterGenerator::generate_result_handler_for and
 766     // SharedRuntime::generate_native_wrapper.
 767     push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
 768   }
 769 
 770   JNI_ArgumentPusher(Method* method)
 771     : SignatureIterator(method->signature(),
 772                         Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
 773   {
 774     _arguments = nullptr;
 775   }
 776 
 777  public:
 778   virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
 779 };
 780 
 781 
 782 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 783   va_list _ap;
 784 
 785   void set_ap(va_list rap) {
 786     va_copy(_ap, rap);
 787   }
 788 
 789   friend class SignatureIterator;  // so do_parameters_on can call do_type
 790   void do_type(BasicType type) {
 791     switch (type) {
 792     // these are coerced to int when using va_arg
 793     case T_BYTE:
 794     case T_CHAR:
 795     case T_SHORT:
 796     case T_INT:         push_int(va_arg(_ap, jint)); break;
 797     case T_BOOLEAN:     push_boolean((jboolean) va_arg(_ap, jint)); break;
 798 
 799     // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 800 
 801     case T_LONG:        push_long(va_arg(_ap, jlong)); break;
 802     // float is coerced to double w/ va_arg
 803     case T_FLOAT:       push_float((jfloat) va_arg(_ap, jdouble)); break;
 804     case T_DOUBLE:      push_double(va_arg(_ap, jdouble)); break;
 805 
 806     case T_ARRAY:
 807     case T_OBJECT:      push_object(va_arg(_ap, jobject)); break;
 808     default:            ShouldNotReachHere();
 809     }
 810   }
 811 
 812  public:
 813   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 814       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
 815     set_ap(rap);
 816   }
 817 
 818   ~JNI_ArgumentPusherVaArg() {
 819     va_end(_ap);
 820   }
 821 
 822   virtual void push_arguments_on(JavaCallArguments* arguments) {
 823     _arguments = arguments;
 824     do_parameters_on(this);
 825   }
 826 };
 827 
 828 
 829 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
 830  protected:
 831   const jvalue *_ap;
 832 
 833   inline void set_ap(const jvalue *rap) { _ap = rap; }
 834 
 835   friend class SignatureIterator;  // so do_parameters_on can call do_type
 836   void do_type(BasicType type) {
 837     switch (type) {
 838     case T_CHAR:        push_int((_ap++)->c); break;
 839     case T_SHORT:       push_int((_ap++)->s); break;
 840     case T_BYTE:        push_int((_ap++)->b); break;
 841     case T_INT:         push_int((_ap++)->i); break;
 842     case T_BOOLEAN:     push_boolean((_ap++)->z); break;
 843     case T_LONG:        push_long((_ap++)->j); break;
 844     case T_FLOAT:       push_float((_ap++)->f); break;
 845     case T_DOUBLE:      push_double((_ap++)->d); break;
 846     case T_ARRAY:
 847     case T_OBJECT:      push_object((_ap++)->l); break;
 848     default:            ShouldNotReachHere();
 849     }
 850   }
 851 
 852  public:
 853   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
 854       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
 855     set_ap(rap);
 856   }
 857 
 858   virtual void push_arguments_on(JavaCallArguments* arguments) {
 859     _arguments = arguments;
 860     do_parameters_on(this);
 861   }
 862 };
 863 
 864 
 865 enum JNICallType {
 866   JNI_STATIC,
 867   JNI_VIRTUAL,
 868   JNI_NONVIRTUAL
 869 };
 870 
 871 
 872 
 873 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
 874   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
 875 
 876   // Create object to hold arguments for the JavaCall, and associate it with
 877   // the jni parser
 878   ResourceMark rm(THREAD);
 879   int number_of_parameters = method->size_of_parameters();
 880   JavaCallArguments java_args(number_of_parameters);
 881 
 882   assert(method->is_static(), "method should be static");
 883 
 884   // Fill out JavaCallArguments object
 885   args->push_arguments_on(&java_args);
 886   // Initialize result type
 887   result->set_type(args->return_type());
 888 
 889   // Invoke the method. Result is returned as oop.
 890   JavaCalls::call(result, method, &java_args, CHECK);
 891 
 892   // Convert result
 893   if (is_reference_type(result->get_type())) {
 894     result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
 895   }
 896 }
 897 
 898 
 899 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
 900   oop recv = JNIHandles::resolve(receiver);
 901   if (recv == nullptr) {
 902     THROW(vmSymbols::java_lang_NullPointerException());
 903   }
 904   Handle h_recv(THREAD, recv);
 905 
 906   int number_of_parameters;
 907   Method* selected_method;
 908   {
 909     Method* m = Method::resolve_jmethod_id(method_id);
 910     number_of_parameters = m->size_of_parameters();
 911     InstanceKlass* holder = m->method_holder();
 912     if (call_type != JNI_VIRTUAL) {
 913         selected_method = m;
 914     } else if (!m->has_itable_index()) {
 915       // non-interface call -- for that little speed boost, don't handlize
 916       debug_only(NoSafepointVerifier nosafepoint;)
 917       // jni_GetMethodID makes sure class is linked and initialized
 918       // so m should have a valid vtable index.
 919       assert(m->valid_vtable_index(), "no valid vtable index");
 920       int vtbl_index = m->vtable_index();
 921       if (vtbl_index != Method::nonvirtual_vtable_index) {
 922         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
 923       } else {
 924         // final method
 925         selected_method = m;
 926       }
 927     } else {
 928       // interface call
 929       int itbl_index = m->itable_index();
 930       Klass* k = h_recv->klass();
 931       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
 932     }
 933   }
 934 
 935   if (selected_method->is_abstract()) {
 936     ResourceMark rm(THREAD);
 937     THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), selected_method->name()->as_C_string());
 938   }
 939 
 940   methodHandle method(THREAD, selected_method);
 941 
 942   // Create object to hold arguments for the JavaCall, and associate it with
 943   // the jni parser
 944   ResourceMark rm(THREAD);
 945   JavaCallArguments java_args(number_of_parameters);
 946 
 947   // handle arguments
 948   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
 949   java_args.push_oop(h_recv); // Push jobject handle
 950 
 951   // Fill out JavaCallArguments object
 952   args->push_arguments_on(&java_args);
 953   // Initialize result type
 954   result->set_type(args->return_type());
 955 
 956   // Invoke the method. Result is returned as oop.
 957   JavaCalls::call(result, method, &java_args, CHECK);
 958 
 959   // Convert result
 960   if (is_reference_type(result->get_type())) {
 961     result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
 962   }
 963 }
 964 
 965 DT_RETURN_MARK_DECL(AllocObject, jobject
 966                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
 967 
 968 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
 969   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
 970 
 971   jobject ret = nullptr;
 972   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
 973 
 974   instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
 975   ret = JNIHandles::make_local(THREAD, i);
 976   return ret;
 977 JNI_END
 978 
 979 DT_RETURN_MARK_DECL(NewObjectA, jobject
 980                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
 981 
 982 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
 983   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
 984 
 985   jobject obj = nullptr;
 986   DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
 987 
 988   instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
 989   obj = JNIHandles::make_local(THREAD, i);
 990   JavaValue jvalue(T_VOID);
 991   JNI_ArgumentPusherArray ap(methodID, args);
 992   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
 993   return obj;
 994 JNI_END
 995 
 996 
 997 DT_RETURN_MARK_DECL(NewObjectV, jobject
 998                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
 999 
1000 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1001   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1002 
1003   jobject obj = nullptr;
1004   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1005 
1006   instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1007   obj = JNIHandles::make_local(THREAD, i);
1008   JavaValue jvalue(T_VOID);
1009   JNI_ArgumentPusherVaArg ap(methodID, args);
1010   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1011   return obj;
1012 JNI_END
1013 
1014 
1015 DT_RETURN_MARK_DECL(NewObject, jobject
1016                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1017 
1018 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1019   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1020 
1021   jobject obj = nullptr;
1022   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1023 
1024   instanceOop i = InstanceKlass::allocate_instance(JNIHandles::resolve_non_null(clazz), CHECK_NULL);
1025   obj = JNIHandles::make_local(THREAD, i);
1026   va_list args;
1027   va_start(args, methodID);
1028   JavaValue jvalue(T_VOID);
1029   JNI_ArgumentPusherVaArg ap(methodID, args);
1030   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1031   va_end(args);
1032   return obj;
1033 JNI_END
1034 
1035 
1036 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1037   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1038 
1039   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1040   jclass ret =
1041     (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1042 
1043   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1044   return ret;
1045 JNI_END
1046 
1047 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1048   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1049 
1050   jboolean ret = JNI_TRUE;
1051   if (obj != nullptr) {
1052     ret = JNI_FALSE;
1053     Klass* k = java_lang_Class::as_Klass(
1054       JNIHandles::resolve_non_null(clazz));
1055     if (k != nullptr) {
1056       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1057     }
1058   }
1059 
1060   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1061   return ret;
1062 JNI_END
1063 
1064 
1065 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1066                                const char *sig, bool is_static, TRAPS) {
1067   // %%%% This code should probably just call into a method in the LinkResolver
1068   //
1069   // The class should have been loaded (we have an instance of the class
1070   // passed in) so the method and signature should already be in the symbol
1071   // table.  If they're not there, the method doesn't exist.
1072   const char *name_to_probe = (name_str == nullptr)
1073                         ? vmSymbols::object_initializer_name()->as_C_string()
1074                         : name_str;
1075   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1076   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1077 
1078   if (name == nullptr || signature == nullptr) {
1079     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1080   }
1081 
1082   oop mirror = JNIHandles::resolve_non_null(clazz);
1083   Klass* klass = java_lang_Class::as_Klass(mirror);
1084 
1085   // Throw a NoSuchMethodError exception if we have an instance of a
1086   // primitive java.lang.Class
1087   if (java_lang_Class::is_primitive(mirror)) {
1088     ResourceMark rm(THREAD);
1089     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1090   }
1091 
1092   // Make sure class is linked and initialized before handing id's out to
1093   // Method*s.
1094   klass->initialize(CHECK_NULL);
1095 
1096   Method* m;
1097   if (name == vmSymbols::object_initializer_name() ||
1098       name == vmSymbols::class_initializer_name()) {
1099     // Never search superclasses for constructors
1100     if (klass->is_instance_klass()) {
1101       m = InstanceKlass::cast(klass)->find_method(name, signature);
1102     } else {
1103       m = nullptr;
1104     }
1105   } else {
1106     m = klass->lookup_method(name, signature);
1107     if (m == nullptr &&  klass->is_instance_klass()) {
1108       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1109     }
1110   }
1111   if (m == nullptr || (m->is_static() != is_static)) {
1112     ResourceMark rm(THREAD);
1113     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1114   }
1115   return m->jmethod_id();
1116 }
1117 
1118 
1119 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1120           const char *name, const char *sig))
1121   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1122   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1123   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1124   return ret;
1125 JNI_END
1126 
1127 
1128 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1129           const char *name, const char *sig))
1130   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1131   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1132   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1133   return ret;
1134 JNI_END
1135 
1136 
1137 
1138 //
1139 // Calling Methods
1140 //
1141 
1142 
1143 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1144                           , EntryProbe, ReturnProbe)    \
1145 \
1146   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1147                           , ReturnProbe);                          \
1148 \
1149 JNI_ENTRY(ResultType, \
1150           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1151 \
1152   EntryProbe; \
1153   ResultType ret{}; \
1154   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1155                      (const ResultType&)ret);\
1156 \
1157   va_list args; \
1158   va_start(args, methodID); \
1159   JavaValue jvalue(Tag); \
1160   JNI_ArgumentPusherVaArg ap(methodID, args); \
1161   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1162   va_end(args); \
1163   ret = jvalue.get_##ResultType(); \
1164   return ret;\
1165 JNI_END
1166 
1167 // the runtime type of subword integral basic types is integer
1168 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1169                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1170                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1171 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1172                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1173                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1174 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1175                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1176                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1177 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1178                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1179                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1180 
1181 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1182                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1183                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1184 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1185                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1186                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1187 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1188                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1189                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1190 // Float and double probes don't return value because dtrace doesn't currently support it
1191 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1192                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1193                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1194 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1195                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1196                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1197 
1198 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1199                           , EntryProbe, ReturnProbe)    \
1200 \
1201   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1202                           , ReturnProbe);                          \
1203 \
1204 JNI_ENTRY(ResultType, \
1205           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1206 \
1207   EntryProbe;\
1208   ResultType ret{}; \
1209   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1210                      (const ResultType&)ret);\
1211 \
1212   JavaValue jvalue(Tag); \
1213   JNI_ArgumentPusherVaArg ap(methodID, args); \
1214   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1215   ret = jvalue.get_##ResultType(); \
1216   return ret;\
1217 JNI_END
1218 
1219 // the runtime type of subword integral basic types is integer
1220 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1221                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1222                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1223 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1224                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1225                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1226 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1227                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1228                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1229 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1230                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1231                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1232 
1233 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1234                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1235                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1236 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1237                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1238                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1239 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1240                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1241                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1242 // Float and double probes don't return value because dtrace doesn't currently support it
1243 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1244                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1245                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1246 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1247                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1248                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1249 
1250 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1251                           , EntryProbe, ReturnProbe)    \
1252 \
1253   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1254                           , ReturnProbe);                          \
1255 \
1256 JNI_ENTRY(ResultType, \
1257           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1258   EntryProbe; \
1259   ResultType ret{}; \
1260   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1261                      (const ResultType&)ret);\
1262 \
1263   JavaValue jvalue(Tag); \
1264   JNI_ArgumentPusherArray ap(methodID, args); \
1265   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1266   ret = jvalue.get_##ResultType(); \
1267   return ret;\
1268 JNI_END
1269 
1270 // the runtime type of subword integral basic types is integer
1271 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1272                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1273                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1274 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1275                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1276                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1277 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1278                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1279                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1280 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1281                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1282                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1283 
1284 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1285                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1286                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1287 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1288                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1289                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1290 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1291                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1292                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1293 // Float and double probes don't return value because dtrace doesn't currently support it
1294 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1295                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1296                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1297 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1298                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1299                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1300 
1301 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1302 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1303 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1304 
1305 
1306 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1307   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1308   DT_VOID_RETURN_MARK(CallVoidMethod);
1309 
1310   va_list args;
1311   va_start(args, methodID);
1312   JavaValue jvalue(T_VOID);
1313   JNI_ArgumentPusherVaArg ap(methodID, args);
1314   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1315   va_end(args);
1316 JNI_END
1317 
1318 
1319 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1320   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1321   DT_VOID_RETURN_MARK(CallVoidMethodV);
1322 
1323   JavaValue jvalue(T_VOID);
1324   JNI_ArgumentPusherVaArg ap(methodID, args);
1325   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1326 JNI_END
1327 
1328 
1329 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1330   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1331   DT_VOID_RETURN_MARK(CallVoidMethodA);
1332 
1333   JavaValue jvalue(T_VOID);
1334   JNI_ArgumentPusherArray ap(methodID, args);
1335   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1336 JNI_END
1337 
1338 
1339 
1340 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1341                                     , EntryProbe, ReturnProbe)      \
1342 \
1343   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1344                           , ReturnProbe);\
1345 \
1346 JNI_ENTRY(ResultType, \
1347           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1348 \
1349   EntryProbe;\
1350   ResultType ret;\
1351   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1352                      (const ResultType&)ret);\
1353 \
1354   va_list args; \
1355   va_start(args, methodID); \
1356   JavaValue jvalue(Tag); \
1357   JNI_ArgumentPusherVaArg ap(methodID, args); \
1358   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1359   va_end(args); \
1360   ret = jvalue.get_##ResultType(); \
1361   return ret;\
1362 JNI_END
1363 
1364 // the runtime type of subword integral basic types is integer
1365 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1366                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1367                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1368 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1369                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1370                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1371 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1372                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1373                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1374 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1375                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1376                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1377 
1378 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1379                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1380                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1381 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1382                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1383                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1384 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1385                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1386 // Float and double probes don't return value because dtrace doesn't currently support it
1387                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1388 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1389                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1390                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1391 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1392                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1393                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1394 
1395 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1396                                     , EntryProbe, ReturnProbe)      \
1397 \
1398   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1399                           , ReturnProbe);\
1400 \
1401 JNI_ENTRY(ResultType, \
1402           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1403 \
1404   EntryProbe;\
1405   ResultType ret;\
1406   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1407                      (const ResultType&)ret);\
1408 \
1409   JavaValue jvalue(Tag); \
1410   JNI_ArgumentPusherVaArg ap(methodID, args); \
1411   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1412   ret = jvalue.get_##ResultType(); \
1413   return ret;\
1414 JNI_END
1415 
1416 // the runtime type of subword integral basic types is integer
1417 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1418                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1419                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1420 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1421                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1422                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1423 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1424                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1425                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1426 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1427                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1428                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1429 
1430 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1431                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1432                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1433 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1434                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1435                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1436 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1437                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1438 // Float and double probes don't return value because dtrace doesn't currently support it
1439                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1440 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1441                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1442                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1443 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1444                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1445                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1446 
1447 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1448                                     , EntryProbe, ReturnProbe)      \
1449 \
1450   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1451                           , ReturnProbe);\
1452 \
1453 JNI_ENTRY(ResultType, \
1454           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1455 \
1456   EntryProbe;\
1457   ResultType ret;\
1458   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1459                      (const ResultType&)ret);\
1460 \
1461   JavaValue jvalue(Tag); \
1462   JNI_ArgumentPusherArray ap(methodID, args); \
1463   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_(ResultType{})); \
1464   ret = jvalue.get_##ResultType(); \
1465   return ret;\
1466 JNI_END
1467 
1468 // the runtime type of subword integral basic types is integer
1469 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1470                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1471                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1472 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1473                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1474                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1475 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1476                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1477                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1478 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1479                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1480                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1481 
1482 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1483                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1484                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1485 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1486                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1487                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1488 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1489                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1490 // Float and double probes don't return value because dtrace doesn't currently support it
1491                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1492 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1493                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1494                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1495 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1496                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1497                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1498 
1499 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1500                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1501 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1502                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1503 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1504                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1505 
1506 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1507   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1508   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1509 
1510   va_list args;
1511   va_start(args, methodID);
1512   JavaValue jvalue(T_VOID);
1513   JNI_ArgumentPusherVaArg ap(methodID, args);
1514   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1515   va_end(args);
1516 JNI_END
1517 
1518 
1519 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1520   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1521                env, obj, cls, (uintptr_t) methodID);
1522   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1523 
1524   JavaValue jvalue(T_VOID);
1525   JNI_ArgumentPusherVaArg ap(methodID, args);
1526   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1527 JNI_END
1528 
1529 
1530 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1531   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1532                 env, obj, cls, (uintptr_t) methodID);
1533   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1534   JavaValue jvalue(T_VOID);
1535   JNI_ArgumentPusherArray ap(methodID, args);
1536   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1537 JNI_END
1538 
1539 
1540 
1541 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1542                                 , EntryProbe, ResultProbe) \
1543 \
1544   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1545                           , ResultProbe);                               \
1546 \
1547 JNI_ENTRY(ResultType, \
1548           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1549 \
1550   EntryProbe; \
1551   ResultType ret{}; \
1552   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1553                      (const ResultType&)ret);\
1554 \
1555   va_list args; \
1556   va_start(args, methodID); \
1557   JavaValue jvalue(Tag); \
1558   JNI_ArgumentPusherVaArg ap(methodID, args); \
1559   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1560   va_end(args); \
1561   ret = jvalue.get_##ResultType(); \
1562   return ret;\
1563 JNI_END
1564 
1565 // the runtime type of subword integral basic types is integer
1566 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1567                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1568                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1569 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1570                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1571                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1572 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1573                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1574                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1575 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1576                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1577                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1578 
1579 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1580                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1581                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1582 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1583                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1584                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1585 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1586                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1587                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1588 // Float and double probes don't return value because dtrace doesn't currently support it
1589 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1590                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1591                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1592 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1593                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1594                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1595 
1596 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1597                                 , EntryProbe, ResultProbe) \
1598 \
1599   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1600                           , ResultProbe);                               \
1601 \
1602 JNI_ENTRY(ResultType, \
1603           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1604 \
1605   EntryProbe; \
1606   ResultType ret{}; \
1607   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1608                      (const ResultType&)ret);\
1609 \
1610   JavaValue jvalue(Tag); \
1611   JNI_ArgumentPusherVaArg ap(methodID, args); \
1612   /* Make sure class is initialized before trying to invoke its method */ \
1613   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1614   k->initialize(CHECK_(ResultType{})); \
1615   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1616   va_end(args); \
1617   ret = jvalue.get_##ResultType(); \
1618   return ret;\
1619 JNI_END
1620 
1621 // the runtime type of subword integral basic types is integer
1622 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1623                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1624                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1625 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1626                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1627                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1628 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1629                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1630                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1631 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1632                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1633                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1634 
1635 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1636                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1637                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1638 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1639                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1640                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1641 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1642                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1643                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1644 // Float and double probes don't return value because dtrace doesn't currently support it
1645 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1646                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1647                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1648 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1649                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1650                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1651 
1652 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1653                                 , EntryProbe, ResultProbe) \
1654 \
1655   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1656                           , ResultProbe);                               \
1657 \
1658 JNI_ENTRY(ResultType, \
1659           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1660 \
1661   EntryProbe; \
1662   ResultType ret{}; \
1663   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1664                      (const ResultType&)ret);\
1665 \
1666   JavaValue jvalue(Tag); \
1667   JNI_ArgumentPusherArray ap(methodID, args); \
1668   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_(ResultType{})); \
1669   ret = jvalue.get_##ResultType(); \
1670   return ret;\
1671 JNI_END
1672 
1673 // the runtime type of subword integral basic types is integer
1674 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1675                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1676                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1677 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1678                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1679                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1680 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1681                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1682                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1683 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1684                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1685                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1686 
1687 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1688                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1689                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1690 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1691                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1692                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1693 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1694                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1695                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1698                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1699                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1700 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1701                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1702                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1703 
1704 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1705                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1706 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1707                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1708 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1709                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1710 
1711 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1712   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1713   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1714 
1715   va_list args;
1716   va_start(args, methodID);
1717   JavaValue jvalue(T_VOID);
1718   JNI_ArgumentPusherVaArg ap(methodID, args);
1719   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1720   va_end(args);
1721 JNI_END
1722 
1723 
1724 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1725   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1726   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1727 
1728   JavaValue jvalue(T_VOID);
1729   JNI_ArgumentPusherVaArg ap(methodID, args);
1730   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1731 JNI_END
1732 
1733 
1734 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1735   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1736   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1737 
1738   JavaValue jvalue(T_VOID);
1739   JNI_ArgumentPusherArray ap(methodID, args);
1740   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1741 JNI_END
1742 
1743 
1744 //
1745 // Accessing Fields
1746 //
1747 
1748 
1749 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1750                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1751 
1752 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1753           const char *name, const char *sig))
1754   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1755   jfieldID ret = nullptr;
1756   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1757 
1758   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1759 
1760   // The class should have been loaded (we have an instance of the class
1761   // passed in) so the field and signature should already be in the symbol
1762   // table.  If they're not there, the field doesn't exist.
1763   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1764   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1765   if (fieldname == nullptr || signame == nullptr) {
1766     ResourceMark rm;
1767     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1768   }
1769 
1770   // Make sure class is initialized before handing id's out to fields
1771   k->initialize(CHECK_NULL);
1772 
1773   fieldDescriptor fd;
1774   if (!k->is_instance_klass() ||
1775       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1776     ResourceMark rm;
1777     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1778   }
1779 
1780   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1781   // It may also have hash bits for k, if VerifyJNIFields is turned on.
1782   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
1783   return ret;
1784 JNI_END
1785 
1786 
1787 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1788   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1789   oop o = JNIHandles::resolve_non_null(obj);
1790   Klass* k = o->klass();
1791   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1792   // Keep JVMTI addition small and only check enabled flag here.
1793   // jni_GetField_probe() assumes that is okay to create handles.
1794   if (JvmtiExport::should_post_field_access()) {
1795     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1796   }
1797   oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1798   jobject ret = JNIHandles::make_local(THREAD, loaded_obj);
1799   HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1800   return ret;
1801 JNI_END
1802 
1803 
1804 
1805 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1806   , EntryProbe, ReturnProbe) \
1807 \
1808   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1809   , ReturnProbe); \
1810 \
1811 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1812 \
1813   EntryProbe; \
1814   Return ret = 0;\
1815   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1816 \
1817   oop o = JNIHandles::resolve_non_null(obj); \
1818   Klass* k = o->klass(); \
1819   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
1820   /* Keep JVMTI addition small and only check enabled flag here.       */ \
1821   if (JvmtiExport::should_post_field_access()) { \
1822     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1823   } \
1824   ret = o->Fieldname##_field(offset); \
1825   return ret; \
1826 JNI_END
1827 
1828 DEFINE_GETFIELD(jboolean, bool,   Boolean
1829                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1830                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1831 DEFINE_GETFIELD(jbyte,    byte,   Byte
1832                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1833                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1834 DEFINE_GETFIELD(jchar,    char,   Char
1835                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1836                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1837 DEFINE_GETFIELD(jshort,   short,  Short
1838                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1839                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1840 DEFINE_GETFIELD(jint,     int,    Int
1841                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1842                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1843 DEFINE_GETFIELD(jlong,    long,   Long
1844                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1845                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1846 // Float and double probes don't return value because dtrace doesn't currently support it
1847 DEFINE_GETFIELD(jfloat,   float,  Float
1848                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1849                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1850 DEFINE_GETFIELD(jdouble,  double, Double
1851                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1852                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1853 
1854 address jni_GetBooleanField_addr() {
1855   return (address)jni_GetBooleanField;
1856 }
1857 address jni_GetByteField_addr() {
1858   return (address)jni_GetByteField;
1859 }
1860 address jni_GetCharField_addr() {
1861   return (address)jni_GetCharField;
1862 }
1863 address jni_GetShortField_addr() {
1864   return (address)jni_GetShortField;
1865 }
1866 address jni_GetIntField_addr() {
1867   return (address)jni_GetIntField;
1868 }
1869 address jni_GetLongField_addr() {
1870   return (address)jni_GetLongField;
1871 }
1872 address jni_GetFloatField_addr() {
1873   return (address)jni_GetFloatField;
1874 }
1875 address jni_GetDoubleField_addr() {
1876   return (address)jni_GetDoubleField;
1877 }
1878 
1879 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1880   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1881   oop o = JNIHandles::resolve_non_null(obj);
1882   Klass* k = o->klass();
1883   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1884   // Keep JVMTI addition small and only check enabled flag here.
1885   if (JvmtiExport::should_post_field_modification()) {
1886     jvalue field_value;
1887     field_value.l = value;
1888     o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1889   }
1890   HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1891   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1892 JNI_END
1893 
1894 // TODO: make this a template
1895 
1896 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1897                         , EntryProbe, ReturnProbe) \
1898 \
1899 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1900 \
1901   EntryProbe; \
1902 \
1903   oop o = JNIHandles::resolve_non_null(obj); \
1904   Klass* k = o->klass(); \
1905   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
1906   /* Keep JVMTI addition small and only check enabled flag here.       */ \
1907   if (JvmtiExport::should_post_field_modification()) { \
1908     jvalue field_value; \
1909     field_value.unionType = value; \
1910     o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1911   } \
1912   o->Fieldname##_field_put(offset, value); \
1913   ReturnProbe; \
1914 JNI_END
1915 
1916 DEFINE_SETFIELD(jboolean, bool,   Boolean, JVM_SIGNATURE_BOOLEAN, z
1917                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1918                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1919 DEFINE_SETFIELD(jbyte,    byte,   Byte,    JVM_SIGNATURE_BYTE, b
1920                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1921                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1922 DEFINE_SETFIELD(jchar,    char,   Char,    JVM_SIGNATURE_CHAR, c
1923                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1924                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1925 DEFINE_SETFIELD(jshort,   short,  Short,   JVM_SIGNATURE_SHORT, s
1926                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1927                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1928 DEFINE_SETFIELD(jint,     int,    Int,     JVM_SIGNATURE_INT, i
1929                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1930                 HOTSPOT_JNI_SETINTFIELD_RETURN())
1931 DEFINE_SETFIELD(jlong,    long,   Long,    JVM_SIGNATURE_LONG, j
1932                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1933                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1934 // Float and double probes don't return value because dtrace doesn't currently support it
1935 DEFINE_SETFIELD(jfloat,   float,  Float,   JVM_SIGNATURE_FLOAT, f
1936                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1937                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1938 DEFINE_SETFIELD(jdouble,  double, Double,  JVM_SIGNATURE_DOUBLE, d
1939                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1940                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1941 
1942 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1943                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1944 
1945 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1946   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1947   jobject ret = nullptr;
1948   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
1949 
1950   fieldDescriptor fd;
1951   bool found = false;
1952   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1953 
1954   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
1955 
1956   if (isStatic) {
1957     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
1958     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
1959     assert(id->is_static_field_id(), "invalid static field id");
1960     found = id->find_local_field(&fd);
1961   } else {
1962     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
1963     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1964     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
1965   }
1966   assert(found, "bad fieldID passed into jni_ToReflectedField");
1967   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
1968   ret = JNIHandles::make_local(THREAD, reflected);
1969   return ret;
1970 JNI_END
1971 
1972 
1973 //
1974 // Accessing Static Fields
1975 //
1976 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
1977                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
1978 
1979 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
1980           const char *name, const char *sig))
1981   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1982   jfieldID ret = nullptr;
1983   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
1984 
1985   // The class should have been loaded (we have an instance of the class
1986   // passed in) so the field and signature should already be in the symbol
1987   // table.  If they're not there, the field doesn't exist.
1988   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1989   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1990   if (fieldname == nullptr || signame == nullptr) {
1991     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
1992   }
1993   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1994   // Make sure class is initialized before handing id's out to static fields
1995   k->initialize(CHECK_NULL);
1996 
1997   fieldDescriptor fd;
1998   if (!k->is_instance_klass() ||
1999       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2000     THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2001   }
2002 
2003   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2004   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2005   debug_only(id->set_is_static_field_id();)
2006 
2007   debug_only(id->verify(fd.field_holder()));
2008 
2009   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2010   return ret;
2011 JNI_END
2012 
2013 
2014 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2015   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2016 #if INCLUDE_JNI_CHECK
2017   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2018 #endif // INCLUDE_JNI_CHECK
2019   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2020   assert(id->is_static_field_id(), "invalid static field id");
2021   // Keep JVMTI addition small and only check enabled flag here.
2022   // jni_GetField_probe() assumes that is okay to create handles.
2023   if (JvmtiExport::should_post_field_access()) {
2024     JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2025   }
2026   jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2027   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2028   return ret;
2029 JNI_END
2030 
2031 
2032 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2033                               , EntryProbe, ReturnProbe) \
2034 \
2035   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2036                           , ReturnProbe);                                          \
2037 \
2038 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2039   EntryProbe; \
2040   Return ret = 0;\
2041   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2042                      (const Return&)ret);\
2043   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2044   assert(id->is_static_field_id(), "invalid static field id"); \
2045   /* Keep JVMTI addition small and only check enabled flag here. */ \
2046   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2047   if (JvmtiExport::should_post_field_access()) { \
2048     JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2049   } \
2050   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2051   return ret;\
2052 JNI_END
2053 
2054 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2055                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2056 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2057                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2058 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2059                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2060 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2061                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2062 DEFINE_GETSTATICFIELD(jint,     int,    Int
2063                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2064 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2065                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2066 // Float and double probes don't return value because dtrace doesn't currently support it
2067 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2068                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2069 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2070                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2071 
2072 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2073  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2074   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2075   assert(id->is_static_field_id(), "invalid static field id");
2076   // Keep JVMTI addition small and only check enabled flag here.
2077   // jni_SetField_probe() assumes that is okay to create handles.
2078   if (JvmtiExport::should_post_field_modification()) {
2079     jvalue field_value;
2080     field_value.l = value;
2081     JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2082   }
2083   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2084   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2085 JNI_END
2086 
2087 
2088 
2089 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2090                               , EntryProbe, ReturnProbe) \
2091 \
2092 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2093   EntryProbe; \
2094 \
2095   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2096   assert(id->is_static_field_id(), "invalid static field id"); \
2097   /* Keep JVMTI addition small and only check enabled flag here. */ \
2098   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2099   if (JvmtiExport::should_post_field_modification()) { \
2100     jvalue field_value; \
2101     field_value.unionType = value; \
2102     JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2103   } \
2104   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2105   ReturnProbe;\
2106 JNI_END
2107 
2108 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, JVM_SIGNATURE_BOOLEAN, z
2109                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2110                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2111 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    JVM_SIGNATURE_BYTE, b
2112                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2113                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2114 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    JVM_SIGNATURE_CHAR, c
2115                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2116                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2117 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   JVM_SIGNATURE_SHORT, s
2118                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2119                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2120 DEFINE_SETSTATICFIELD(jint,     int,    Int,     JVM_SIGNATURE_INT, i
2121                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2122                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2123 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    JVM_SIGNATURE_LONG, j
2124                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2125                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2126 // Float and double probes don't return value because dtrace doesn't currently support it
2127 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   JVM_SIGNATURE_FLOAT, f
2128                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2129                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2130 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  JVM_SIGNATURE_DOUBLE, d
2131                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2132                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2133 
2134 //
2135 // String Operations
2136 //
2137 
2138 // Unicode Interface
2139 
2140 DT_RETURN_MARK_DECL(NewString, jstring
2141                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2142 
2143 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2144  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2145   jstring ret = nullptr;
2146   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2147   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2148   ret = (jstring) JNIHandles::make_local(THREAD, string);
2149   return ret;
2150 JNI_END
2151 
2152 
2153 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2154   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2155   jsize ret = 0;
2156   oop s = JNIHandles::resolve_non_null(string);
2157   ret = java_lang_String::length(s);
2158  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2159   return ret;
2160 JNI_END
2161 
2162 
2163 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2164   JNIEnv *env, jstring string, jboolean *isCopy))
2165  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2166   jchar* buf = nullptr;
2167   oop s = JNIHandles::resolve_non_null(string);
2168   typeArrayOop s_value = java_lang_String::value(s);
2169   if (s_value != nullptr) {
2170     int s_len = java_lang_String::length(s, s_value);
2171     bool is_latin1 = java_lang_String::is_latin1(s);
2172     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2173     /* JNI Specification states return null on OOM */
2174     if (buf != nullptr) {
2175       if (s_len > 0) {
2176         if (!is_latin1) {
2177           ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2178                                              buf, s_len);
2179         } else {
2180           for (int i = 0; i < s_len; i++) {
2181             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2182           }
2183         }
2184       }
2185       buf[s_len] = 0;
2186       //%note jni_5
2187       if (isCopy != nullptr) {
2188         *isCopy = JNI_TRUE;
2189       }
2190     }
2191   }
2192   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2193   return buf;
2194 JNI_END
2195 
2196 
2197 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2198   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2199   //%note jni_6
2200   if (chars != nullptr) {
2201     // Since String objects are supposed to be immutable, don't copy any
2202     // new data back.  A bad user will have to go after the char array.
2203     FreeHeap((void*) chars);
2204   }
2205   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2206 JNI_END
2207 
2208 
2209 // UTF Interface
2210 
2211 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2212                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2213 
2214 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2215   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2216   jstring ret;
2217   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2218 
2219   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2220   ret = (jstring) JNIHandles::make_local(THREAD, result);
2221   return ret;
2222 JNI_END
2223 
2224 
2225 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2226   HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2227   oop java_string = JNIHandles::resolve_non_null(string);
2228   jsize ret = java_lang_String::utf8_length_as_int(java_string);
2229   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2230   return ret;
2231 JNI_END
2232 
2233 JNI_ENTRY(jlong, jni_GetStringUTFLengthAsLong(JNIEnv *env, jstring string))
2234   HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_ENTRY(env, string);
2235   oop java_string = JNIHandles::resolve_non_null(string);
2236   size_t ret = java_lang_String::utf8_length(java_string);
2237   HOTSPOT_JNI_GETSTRINGUTFLENGTHASLONG_RETURN(ret);
2238 return checked_cast<jlong>(ret);
2239 JNI_END
2240 
2241 
2242 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2243  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2244   char* result = nullptr;
2245   oop java_string = JNIHandles::resolve_non_null(string);
2246   typeArrayOop s_value = java_lang_String::value(java_string);
2247   if (s_value != nullptr) {
2248     size_t length = java_lang_String::utf8_length(java_string, s_value);
2249     // JNI Specification states return null on OOM.
2250     // The resulting sequence doesn't have to be NUL-terminated but we do.
2251     result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2252     if (result != nullptr) {
2253       java_lang_String::as_utf8_string(java_string, s_value, result, length + 1);
2254       if (isCopy != nullptr) {
2255         *isCopy = JNI_TRUE;
2256       }
2257     }
2258   }
2259  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2260   return result;
2261 JNI_END
2262 
2263 
2264 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2265  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2266   if (chars != nullptr) {
2267     FreeHeap((char*) chars);
2268   }
2269 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2270 JNI_END
2271 
2272 
2273 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2274  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2275   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2276   assert(a->is_array(), "must be array");
2277   jsize ret = a->length();
2278  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2279   return ret;
2280 JNI_END
2281 
2282 
2283 //
2284 // Object Array Operations
2285 //
2286 
2287 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2288                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2289 
2290 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2291  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2292   jobjectArray ret = nullptr;
2293   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2294   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2295   Klass* ak = ek->array_klass(CHECK_NULL);
2296   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2297   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2298   oop initial_value = JNIHandles::resolve(initialElement);
2299   if (initial_value != nullptr) {  // array already initialized with null
2300     for (int index = 0; index < length; index++) {
2301       result->obj_at_put(index, initial_value);
2302     }
2303   }
2304   ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2305   return ret;
2306 JNI_END
2307 
2308 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2309                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2310 
2311 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2312  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2313   jobject ret = nullptr;
2314   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2315   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2316   if (a->is_within_bounds(index)) {
2317     ret = JNIHandles::make_local(THREAD, a->obj_at(index));
2318     return ret;
2319   } else {
2320     ResourceMark rm(THREAD);
2321     stringStream ss;
2322     ss.print("Index %d out of bounds for length %d", index, a->length());
2323     THROW_MSG_NULL(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2324   }
2325 JNI_END
2326 
2327 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2328                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2329 
2330 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2331  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2332   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2333 
2334   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2335   oop v = JNIHandles::resolve(value);
2336   if (a->is_within_bounds(index)) {
2337     if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2338       a->obj_at_put(index, v);
2339     } else {
2340       ResourceMark rm(THREAD);
2341       stringStream ss;
2342       Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2343       ss.print("type mismatch: can not store %s to %s[%d]",
2344                v->klass()->external_name(),
2345                bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2346                index);
2347       for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2348         ss.print("[]");
2349       }
2350       THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2351     }
2352   } else {
2353     ResourceMark rm(THREAD);
2354     stringStream ss;
2355     ss.print("Index %d out of bounds for length %d", index, a->length());
2356     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2357   }
2358 JNI_END
2359 
2360 
2361 
2362 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2363                               ,EntryProbe,ReturnProbe)  \
2364 \
2365   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2366                       , ReturnProbe); \
2367 \
2368 JNI_ENTRY(Return, \
2369           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2370   EntryProbe; \
2371   Return ret = nullptr;\
2372   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2373 \
2374   oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2375   ret = (Return) JNIHandles::make_local(THREAD, obj); \
2376   return ret;\
2377 JNI_END
2378 
2379 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2380                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2381                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2382 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2383                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2384                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2385 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2386                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2387                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2388 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2389                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2390                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2391 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2392                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2393                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2394 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2395                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2396                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2397 DEFINE_NEWSCALARARRAY(jfloatArray,   new_floatArray,  Float,
2398                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2399                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2400 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2401                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2402                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2403 
2404 // Return an address which will fault if the caller writes to it.
2405 
2406 static char* get_bad_address() {
2407   static char* bad_address = nullptr;
2408   if (bad_address == nullptr) {
2409     size_t size = os::vm_allocation_granularity();
2410     bad_address = os::reserve_memory(size);
2411     if (bad_address != nullptr) {
2412       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2413                          /*is_committed*/false);
2414       MemTracker::record_virtual_memory_tag((void*)bad_address, mtInternal);
2415     }
2416   }
2417   return bad_address;
2418 }
2419 
2420 
2421 
2422 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2423                                       , EntryProbe, ReturnProbe) \
2424 \
2425 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2426           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2427   EntryProbe; \
2428   /* allocate an chunk of memory in c land */ \
2429   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2430   ElementType* result; \
2431   int len = a->length(); \
2432   if (len == 0) { \
2433     if (isCopy != nullptr) { \
2434       *isCopy = JNI_FALSE; \
2435     } \
2436     /* Empty array: legal but useless, can't return null. \
2437      * Return a pointer to something useless. \
2438      * Avoid asserts in typeArrayOop. */ \
2439     result = (ElementType*)get_bad_address(); \
2440   } else { \
2441     /* JNI Specification states return null on OOM */                    \
2442     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2443     if (result != nullptr) {                                             \
2444       /* copy the array to the c chunk */                                \
2445       ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2446                                          result, len);                   \
2447       if (isCopy) {                                                      \
2448         *isCopy = JNI_TRUE;                                              \
2449       }                                                                  \
2450     }                                                                    \
2451   } \
2452   ReturnProbe; \
2453   return result; \
2454 JNI_END
2455 
2456 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2457                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2458                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2459 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2460                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2461                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2462 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2463                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2464                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2465 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2466                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2467                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2468 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2469                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2470                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2471 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2472                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2473                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2474 // Float and double probes don't return value because dtrace doesn't currently support it
2475 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2476                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2477                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2478 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2479                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2480                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2481 
2482 
2483 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2484                                           , EntryProbe, ReturnProbe);\
2485 \
2486 JNI_ENTRY_NO_PRESERVE(void, \
2487           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2488                                              ElementType *buf, jint mode)) \
2489   EntryProbe; \
2490   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2491   int len = a->length(); \
2492   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2493     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2494       ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2495     } \
2496     if ((mode == 0) || (mode == JNI_ABORT)) { \
2497       FreeHeap(buf); \
2498     } \
2499   } \
2500   ReturnProbe; \
2501 JNI_END
2502 
2503 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2504                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2505                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2506 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2507                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2508                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2509 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2510                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2511                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2512 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2513                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2514                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2515 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2516                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2517                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2518 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2519                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2520                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2521 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2522                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2523                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2524 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2525                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2526                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2527 
2528 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2529   ResourceMark rm(THREAD);
2530   if (copy_len < 0) {
2531     stringStream ss;
2532     ss.print("Length %d is negative", copy_len);
2533     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2534   } else if (start < 0 || (start > array_len - copy_len)) {
2535     stringStream ss;
2536     ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2537              start, (int64_t)start+(int64_t)copy_len, array_len);
2538     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2539   }
2540 }
2541 
2542 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2543                                     , EntryProbe, ReturnProbe); \
2544   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2545                            , ReturnProbe); \
2546 \
2547 JNI_ENTRY(void, \
2548 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2549              jsize len, ElementType *buf)) \
2550   EntryProbe; \
2551   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2552   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2553   check_bounds(start, len, src->length(), CHECK); \
2554   if (len > 0) {    \
2555     ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2556   } \
2557 JNI_END
2558 
2559 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2560                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2561                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2562 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2563                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2564                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2565 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2566                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2567                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2568 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2569                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2570                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2571 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2572                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2573                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2574 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2575                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2576                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2577 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2578                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2579                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2580 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2581                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2582                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2583 
2584 
2585 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2586                                     , EntryProbe, ReturnProbe); \
2587   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2588                            ,ReturnProbe);           \
2589 \
2590 JNI_ENTRY(void, \
2591 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2592              jsize len, const ElementType *buf)) \
2593   EntryProbe; \
2594   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2595   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2596   check_bounds(start, len, dst->length(), CHECK); \
2597   if (len > 0) { \
2598     ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2599   } \
2600 JNI_END
2601 
2602 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2603                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2604                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2605 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2606                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2607                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2608 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2609                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2610                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2611 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2612                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2613                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2614 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2615                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2616                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2617 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2618                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2619                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2620 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2621                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2622                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2623 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2624                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2625                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2626 
2627 
2628 DT_RETURN_MARK_DECL(RegisterNatives, jint
2629                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2630 
2631 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2632                                     const JNINativeMethod *methods,
2633                                     jint nMethods))
2634   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2635   jint ret = 0;
2636   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2637 
2638   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2639 
2640   // There are no restrictions on native code registering native methods,
2641   // which allows agents to redefine the bindings to native methods, however
2642   // we issue a warning if any code running outside of the boot/platform
2643   // loader is rebinding any native methods in classes loaded by the
2644   // boot/platform loader that are in named modules. That will catch changes
2645   // to platform classes while excluding classes added to the bootclasspath.
2646   bool do_warning = false;
2647 
2648   // Only instanceKlasses can have native methods
2649   if (k->is_instance_klass()) {
2650     oop cl = k->class_loader();
2651     InstanceKlass* ik = InstanceKlass::cast(k);
2652     // Check for a platform class
2653     if ((cl ==  nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2654         ik->module()->is_named()) {
2655       Klass* caller = thread->security_get_caller_class(1);
2656       // If no caller class, or caller class has a different loader, then
2657       // issue a warning below.
2658       do_warning = (caller == nullptr) || caller->class_loader() != cl;
2659     }
2660   }
2661 
2662 
2663   for (int index = 0; index < nMethods; index++) {
2664     const char* meth_name = methods[index].name;
2665     const char* meth_sig = methods[index].signature;
2666     int meth_name_len = (int)strlen(meth_name);
2667 
2668     // The class should have been loaded (we have an instance of the class
2669     // passed in) so the method and signature should already be in the symbol
2670     // table.  If they're not there, the method doesn't exist.
2671     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
2672     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2673 
2674     if (name == nullptr || signature == nullptr) {
2675       ResourceMark rm(THREAD);
2676       stringStream st;
2677       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2678       // Must return negative value on failure
2679       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2680     }
2681 
2682     if (do_warning) {
2683       ResourceMark rm(THREAD);
2684       log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2685               "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2686     }
2687 
2688     bool res = Method::register_native(k, name, signature,
2689                                        (address) methods[index].fnPtr, THREAD);
2690     if (!res) {
2691       ret = -1;
2692       break;
2693     }
2694   }
2695   return ret;
2696 JNI_END
2697 
2698 
2699 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2700  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2701   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2702   //%note jni_2
2703   if (k->is_instance_klass()) {
2704     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2705       Method* m = InstanceKlass::cast(k)->methods()->at(index);
2706       if (m->is_native()) {
2707         m->clear_native_function();
2708         m->set_signature_handler(nullptr);
2709       }
2710     }
2711   }
2712  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2713   return 0;
2714 JNI_END
2715 
2716 //
2717 // Monitor functions
2718 //
2719 
2720 DT_RETURN_MARK_DECL(MonitorEnter, jint
2721                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2722 
2723 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2724  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2725   jint ret = JNI_ERR;
2726   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2727 
2728   // If the object is null, we can't do anything with it
2729   if (jobj == nullptr) {
2730     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2731   }
2732 
2733   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2734   ObjectSynchronizer::jni_enter(obj, thread);
2735   return JNI_OK;
2736 JNI_END
2737 
2738 DT_RETURN_MARK_DECL(MonitorExit, jint
2739                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2740 
2741 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2742  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2743   jint ret = JNI_ERR;
2744   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2745 
2746   // Don't do anything with a null object
2747   if (jobj == nullptr) {
2748     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2749   }
2750 
2751   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2752   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2753   return JNI_OK;
2754 JNI_END
2755 
2756 //
2757 // Extensions
2758 //
2759 
2760 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2761                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2762 
2763 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2764  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2765   DT_VOID_RETURN_MARK(GetStringRegion);
2766   oop s = JNIHandles::resolve_non_null(string);
2767   typeArrayOop s_value = java_lang_String::value(s);
2768   int s_len = java_lang_String::length(s, s_value);
2769   if (start < 0 || len < 0 || start > s_len - len) {
2770     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2771   } else {
2772     if (len > 0) {
2773       bool is_latin1 = java_lang_String::is_latin1(s);
2774       if (!is_latin1) {
2775         ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2776                                            buf, len);
2777       } else {
2778         for (int i = 0; i < len; i++) {
2779           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2780         }
2781       }
2782     }
2783   }
2784 JNI_END
2785 
2786 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2787                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2788 
2789 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2790  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2791   DT_VOID_RETURN_MARK(GetStringUTFRegion);
2792   oop s = JNIHandles::resolve_non_null(string);
2793   typeArrayOop s_value = java_lang_String::value(s);
2794   int s_len = java_lang_String::length(s, s_value);
2795   if (start < 0 || len < 0 || start > s_len - len) {
2796     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2797   } else {
2798     //%note jni_7
2799     if (len > 0) {
2800       // Assume the buffer is large enough as the JNI spec. does not require user error checking
2801       java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2802       // as_utf8_string null-terminates the result string
2803     } else {
2804       // JDK null-terminates the buffer even in len is zero
2805       if (buf != nullptr) {
2806         buf[0] = 0;
2807       }
2808     }
2809   }
2810 JNI_END
2811 
2812 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2813  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2814   Handle a(thread, JNIHandles::resolve_non_null(array));
2815   assert(a->is_typeArray(), "just checking");
2816 
2817   // Pin object
2818   Universe::heap()->pin_object(thread, a());
2819 
2820   BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2821   void* ret = arrayOop(a())->base(type);
2822   if (isCopy != nullptr) {
2823     *isCopy = JNI_FALSE;
2824   }
2825  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2826   return ret;
2827 JNI_END
2828 
2829 
2830 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2831   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2832   // Unpin object
2833   Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2834 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2835 JNI_END
2836 
2837 
2838 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2839   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2840   oop s = JNIHandles::resolve_non_null(string);
2841   jchar* ret;
2842   if (!java_lang_String::is_latin1(s)) {
2843     typeArrayHandle s_value(thread, java_lang_String::value(s));
2844 
2845     // Pin value array
2846     Universe::heap()->pin_object(thread, s_value());
2847 
2848     ret = (jchar*) s_value->base(T_CHAR);
2849     if (isCopy != nullptr) *isCopy = JNI_FALSE;
2850   } else {
2851     // Inflate latin1 encoded string to UTF16
2852     typeArrayOop s_value = java_lang_String::value(s);
2853     int s_len = java_lang_String::length(s, s_value);
2854     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2855     /* JNI Specification states return null on OOM */
2856     if (ret != nullptr) {
2857       for (int i = 0; i < s_len; i++) {
2858         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2859       }
2860       ret[s_len] = 0;
2861     }
2862     if (isCopy != nullptr) *isCopy = JNI_TRUE;
2863   }
2864  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2865   return ret;
2866 JNI_END
2867 
2868 
2869 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2870   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2871   oop s = JNIHandles::resolve_non_null(str);
2872   bool is_latin1 = java_lang_String::is_latin1(s);
2873 
2874   if (is_latin1) {
2875     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2876     // This assumes that ReleaseStringCritical bookends GetStringCritical.
2877     FREE_C_HEAP_ARRAY(jchar, chars);
2878   } else {
2879     // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2880     // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2881     oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2882 
2883     // Unpin value array
2884     Universe::heap()->unpin_object(thread, value);
2885   }
2886 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2887 JNI_END
2888 
2889 
2890 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2891   HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2892   Handle ref_handle(thread, JNIHandles::resolve(ref));
2893   jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2894   if (ret == nullptr && ref_handle.not_null()) {
2895     THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2896   }
2897   HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2898   return ret;
2899 JNI_END
2900 
2901 // Must be JNI_ENTRY (with HandleMark)
2902 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2903   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2904   JNIHandles::destroy_weak_global(ref);
2905   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2906 JNI_END
2907 
2908 
2909 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2910  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2911   jni_check_async_exceptions(thread);
2912   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2913  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2914   return ret;
2915 JNI_END
2916 
2917 
2918 // Initialization state for three routines below relating to
2919 // java.nio.DirectBuffers
2920 static          int directBufferSupportInitializeStarted = 0;
2921 static volatile int directBufferSupportInitializeEnded   = 0;
2922 static volatile int directBufferSupportInitializeFailed  = 0;
2923 static jclass    bufferClass                 = nullptr;
2924 static jclass    directBufferClass           = nullptr;
2925 static jclass    directByteBufferClass       = nullptr;
2926 static jmethodID directByteBufferConstructor = nullptr;
2927 static jfieldID  directBufferAddressField    = nullptr;
2928 static jfieldID  bufferCapacityField         = nullptr;
2929 
2930 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
2931   Handle loader;            // null (bootstrap) loader
2932   Handle protection_domain; // null protection domain
2933 
2934   TempNewSymbol sym = SymbolTable::new_symbol(name);
2935   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
2936 
2937   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
2938     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
2939   }
2940   return result;
2941 }
2942 
2943 // These lookups are done with the null (bootstrap) ClassLoader to
2944 // circumvent any security checks that would be done by jni_FindClass.
2945 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
2946 {
2947   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == nullptr) { return false; }
2948   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == nullptr) { return false; }
2949   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
2950   return true;
2951 }
2952 JNI_END
2953 
2954 
2955 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
2956   if (directBufferSupportInitializeFailed) {
2957     return false;
2958   }
2959 
2960   if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
2961     if (!lookupDirectBufferClasses(env)) {
2962       directBufferSupportInitializeFailed = 1;
2963       return false;
2964     }
2965 
2966     // Make global references for these
2967     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
2968     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
2969     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
2970 
2971     // Global refs will be null if out-of-memory (no exception is pending)
2972     if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
2973       directBufferSupportInitializeFailed = 1;
2974       return false;
2975     }
2976 
2977     // Get needed field and method IDs
2978     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
2979     if (env->ExceptionCheck()) {
2980       env->ExceptionClear();
2981       directBufferSupportInitializeFailed = 1;
2982       return false;
2983     }
2984     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
2985     if (env->ExceptionCheck()) {
2986       env->ExceptionClear();
2987       directBufferSupportInitializeFailed = 1;
2988       return false;
2989     }
2990     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
2991     if (env->ExceptionCheck()) {
2992       env->ExceptionClear();
2993       directBufferSupportInitializeFailed = 1;
2994       return false;
2995     }
2996 
2997     if ((directByteBufferConstructor == nullptr) ||
2998         (directBufferAddressField    == nullptr) ||
2999         (bufferCapacityField         == nullptr)) {
3000       directBufferSupportInitializeFailed = 1;
3001       return false;
3002     }
3003 
3004     directBufferSupportInitializeEnded = 1;
3005   } else {
3006     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3007       os::naked_yield();
3008     }
3009   }
3010 
3011   return !directBufferSupportInitializeFailed;
3012 }
3013 
3014 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3015 {
3016   // thread_from_jni_environment() will block if VM is gone.
3017   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3018 
3019  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3020 
3021   if (!directBufferSupportInitializeEnded) {
3022     if (!initializeDirectBufferSupport(env, thread)) {
3023       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3024       return nullptr;
3025     }
3026   }
3027 
3028   // Being paranoid about accidental sign extension on address
3029   jlong addr = (jlong) ((uintptr_t) address);
3030   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3031   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3032   return ret;
3033 }
3034 
3035 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3036                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3037 
3038 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3039 {
3040   // thread_from_jni_environment() will block if VM is gone.
3041   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3042 
3043   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3044   void* ret = nullptr;
3045   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3046 
3047   if (!directBufferSupportInitializeEnded) {
3048     if (!initializeDirectBufferSupport(env, thread)) {
3049       return nullptr;
3050     }
3051   }
3052 
3053   if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3054     return nullptr;
3055   }
3056 
3057   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3058   return ret;
3059 }
3060 
3061 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3062                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3063 
3064 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3065 {
3066   // thread_from_jni_environment() will block if VM is gone.
3067   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3068 
3069   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3070   jlong ret = -1;
3071   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3072 
3073   if (!directBufferSupportInitializeEnded) {
3074     if (!initializeDirectBufferSupport(env, thread)) {
3075       ret = 0;
3076       return ret;
3077     }
3078   }
3079 
3080   if (buf == nullptr) {
3081     return -1;
3082   }
3083 
3084   if (!env->IsInstanceOf(buf, directBufferClass)) {
3085     return -1;
3086   }
3087 
3088   // NOTE that capacity is currently an int in the implementation
3089   ret = env->GetIntField(buf, bufferCapacityField);
3090   return ret;
3091 }
3092 
3093 
3094 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3095   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3096   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3097   return CurrentVersion;
3098 JNI_END
3099 
3100 extern struct JavaVM_ main_vm;
3101 
3102 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3103   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3104   *vm  = (JavaVM *)(&main_vm);
3105   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3106   return JNI_OK;
3107 JNI_END
3108 
3109 
3110 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3111   return Modules::get_module(clazz, THREAD);
3112 JNI_END
3113 
3114 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3115   oop thread_obj = JNIHandles::resolve_external_guard(obj);
3116   if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3117     return JNI_TRUE;
3118   } else {
3119     return JNI_FALSE;
3120   }
3121 JNI_END
3122 
3123 
3124 // Structure containing all jni functions
3125 struct JNINativeInterface_ jni_NativeInterface = {
3126     nullptr,
3127     nullptr,
3128     nullptr,
3129 
3130     nullptr,
3131 
3132     jni_GetVersion,
3133 
3134     jni_DefineClass,
3135     jni_FindClass,
3136 
3137     jni_FromReflectedMethod,
3138     jni_FromReflectedField,
3139 
3140     jni_ToReflectedMethod,
3141 
3142     jni_GetSuperclass,
3143     jni_IsAssignableFrom,
3144 
3145     jni_ToReflectedField,
3146 
3147     jni_Throw,
3148     jni_ThrowNew,
3149     jni_ExceptionOccurred,
3150     jni_ExceptionDescribe,
3151     jni_ExceptionClear,
3152     jni_FatalError,
3153 
3154     jni_PushLocalFrame,
3155     jni_PopLocalFrame,
3156 
3157     jni_NewGlobalRef,
3158     jni_DeleteGlobalRef,
3159     jni_DeleteLocalRef,
3160     jni_IsSameObject,
3161 
3162     jni_NewLocalRef,
3163     jni_EnsureLocalCapacity,
3164 
3165     jni_AllocObject,
3166     jni_NewObject,
3167     jni_NewObjectV,
3168     jni_NewObjectA,
3169 
3170     jni_GetObjectClass,
3171     jni_IsInstanceOf,
3172 
3173     jni_GetMethodID,
3174 
3175     jni_CallObjectMethod,
3176     jni_CallObjectMethodV,
3177     jni_CallObjectMethodA,
3178     jni_CallBooleanMethod,
3179     jni_CallBooleanMethodV,
3180     jni_CallBooleanMethodA,
3181     jni_CallByteMethod,
3182     jni_CallByteMethodV,
3183     jni_CallByteMethodA,
3184     jni_CallCharMethod,
3185     jni_CallCharMethodV,
3186     jni_CallCharMethodA,
3187     jni_CallShortMethod,
3188     jni_CallShortMethodV,
3189     jni_CallShortMethodA,
3190     jni_CallIntMethod,
3191     jni_CallIntMethodV,
3192     jni_CallIntMethodA,
3193     jni_CallLongMethod,
3194     jni_CallLongMethodV,
3195     jni_CallLongMethodA,
3196     jni_CallFloatMethod,
3197     jni_CallFloatMethodV,
3198     jni_CallFloatMethodA,
3199     jni_CallDoubleMethod,
3200     jni_CallDoubleMethodV,
3201     jni_CallDoubleMethodA,
3202     jni_CallVoidMethod,
3203     jni_CallVoidMethodV,
3204     jni_CallVoidMethodA,
3205 
3206     jni_CallNonvirtualObjectMethod,
3207     jni_CallNonvirtualObjectMethodV,
3208     jni_CallNonvirtualObjectMethodA,
3209     jni_CallNonvirtualBooleanMethod,
3210     jni_CallNonvirtualBooleanMethodV,
3211     jni_CallNonvirtualBooleanMethodA,
3212     jni_CallNonvirtualByteMethod,
3213     jni_CallNonvirtualByteMethodV,
3214     jni_CallNonvirtualByteMethodA,
3215     jni_CallNonvirtualCharMethod,
3216     jni_CallNonvirtualCharMethodV,
3217     jni_CallNonvirtualCharMethodA,
3218     jni_CallNonvirtualShortMethod,
3219     jni_CallNonvirtualShortMethodV,
3220     jni_CallNonvirtualShortMethodA,
3221     jni_CallNonvirtualIntMethod,
3222     jni_CallNonvirtualIntMethodV,
3223     jni_CallNonvirtualIntMethodA,
3224     jni_CallNonvirtualLongMethod,
3225     jni_CallNonvirtualLongMethodV,
3226     jni_CallNonvirtualLongMethodA,
3227     jni_CallNonvirtualFloatMethod,
3228     jni_CallNonvirtualFloatMethodV,
3229     jni_CallNonvirtualFloatMethodA,
3230     jni_CallNonvirtualDoubleMethod,
3231     jni_CallNonvirtualDoubleMethodV,
3232     jni_CallNonvirtualDoubleMethodA,
3233     jni_CallNonvirtualVoidMethod,
3234     jni_CallNonvirtualVoidMethodV,
3235     jni_CallNonvirtualVoidMethodA,
3236 
3237     jni_GetFieldID,
3238 
3239     jni_GetObjectField,
3240     jni_GetBooleanField,
3241     jni_GetByteField,
3242     jni_GetCharField,
3243     jni_GetShortField,
3244     jni_GetIntField,
3245     jni_GetLongField,
3246     jni_GetFloatField,
3247     jni_GetDoubleField,
3248 
3249     jni_SetObjectField,
3250     jni_SetBooleanField,
3251     jni_SetByteField,
3252     jni_SetCharField,
3253     jni_SetShortField,
3254     jni_SetIntField,
3255     jni_SetLongField,
3256     jni_SetFloatField,
3257     jni_SetDoubleField,
3258 
3259     jni_GetStaticMethodID,
3260 
3261     jni_CallStaticObjectMethod,
3262     jni_CallStaticObjectMethodV,
3263     jni_CallStaticObjectMethodA,
3264     jni_CallStaticBooleanMethod,
3265     jni_CallStaticBooleanMethodV,
3266     jni_CallStaticBooleanMethodA,
3267     jni_CallStaticByteMethod,
3268     jni_CallStaticByteMethodV,
3269     jni_CallStaticByteMethodA,
3270     jni_CallStaticCharMethod,
3271     jni_CallStaticCharMethodV,
3272     jni_CallStaticCharMethodA,
3273     jni_CallStaticShortMethod,
3274     jni_CallStaticShortMethodV,
3275     jni_CallStaticShortMethodA,
3276     jni_CallStaticIntMethod,
3277     jni_CallStaticIntMethodV,
3278     jni_CallStaticIntMethodA,
3279     jni_CallStaticLongMethod,
3280     jni_CallStaticLongMethodV,
3281     jni_CallStaticLongMethodA,
3282     jni_CallStaticFloatMethod,
3283     jni_CallStaticFloatMethodV,
3284     jni_CallStaticFloatMethodA,
3285     jni_CallStaticDoubleMethod,
3286     jni_CallStaticDoubleMethodV,
3287     jni_CallStaticDoubleMethodA,
3288     jni_CallStaticVoidMethod,
3289     jni_CallStaticVoidMethodV,
3290     jni_CallStaticVoidMethodA,
3291 
3292     jni_GetStaticFieldID,
3293 
3294     jni_GetStaticObjectField,
3295     jni_GetStaticBooleanField,
3296     jni_GetStaticByteField,
3297     jni_GetStaticCharField,
3298     jni_GetStaticShortField,
3299     jni_GetStaticIntField,
3300     jni_GetStaticLongField,
3301     jni_GetStaticFloatField,
3302     jni_GetStaticDoubleField,
3303 
3304     jni_SetStaticObjectField,
3305     jni_SetStaticBooleanField,
3306     jni_SetStaticByteField,
3307     jni_SetStaticCharField,
3308     jni_SetStaticShortField,
3309     jni_SetStaticIntField,
3310     jni_SetStaticLongField,
3311     jni_SetStaticFloatField,
3312     jni_SetStaticDoubleField,
3313 
3314     jni_NewString,
3315     jni_GetStringLength,
3316     jni_GetStringChars,
3317     jni_ReleaseStringChars,
3318 
3319     jni_NewStringUTF,
3320     jni_GetStringUTFLength,
3321     jni_GetStringUTFChars,
3322     jni_ReleaseStringUTFChars,
3323 
3324     jni_GetArrayLength,
3325 
3326     jni_NewObjectArray,
3327     jni_GetObjectArrayElement,
3328     jni_SetObjectArrayElement,
3329 
3330     jni_NewBooleanArray,
3331     jni_NewByteArray,
3332     jni_NewCharArray,
3333     jni_NewShortArray,
3334     jni_NewIntArray,
3335     jni_NewLongArray,
3336     jni_NewFloatArray,
3337     jni_NewDoubleArray,
3338 
3339     jni_GetBooleanArrayElements,
3340     jni_GetByteArrayElements,
3341     jni_GetCharArrayElements,
3342     jni_GetShortArrayElements,
3343     jni_GetIntArrayElements,
3344     jni_GetLongArrayElements,
3345     jni_GetFloatArrayElements,
3346     jni_GetDoubleArrayElements,
3347 
3348     jni_ReleaseBooleanArrayElements,
3349     jni_ReleaseByteArrayElements,
3350     jni_ReleaseCharArrayElements,
3351     jni_ReleaseShortArrayElements,
3352     jni_ReleaseIntArrayElements,
3353     jni_ReleaseLongArrayElements,
3354     jni_ReleaseFloatArrayElements,
3355     jni_ReleaseDoubleArrayElements,
3356 
3357     jni_GetBooleanArrayRegion,
3358     jni_GetByteArrayRegion,
3359     jni_GetCharArrayRegion,
3360     jni_GetShortArrayRegion,
3361     jni_GetIntArrayRegion,
3362     jni_GetLongArrayRegion,
3363     jni_GetFloatArrayRegion,
3364     jni_GetDoubleArrayRegion,
3365 
3366     jni_SetBooleanArrayRegion,
3367     jni_SetByteArrayRegion,
3368     jni_SetCharArrayRegion,
3369     jni_SetShortArrayRegion,
3370     jni_SetIntArrayRegion,
3371     jni_SetLongArrayRegion,
3372     jni_SetFloatArrayRegion,
3373     jni_SetDoubleArrayRegion,
3374 
3375     jni_RegisterNatives,
3376     jni_UnregisterNatives,
3377 
3378     jni_MonitorEnter,
3379     jni_MonitorExit,
3380 
3381     jni_GetJavaVM,
3382 
3383     jni_GetStringRegion,
3384     jni_GetStringUTFRegion,
3385 
3386     jni_GetPrimitiveArrayCritical,
3387     jni_ReleasePrimitiveArrayCritical,
3388 
3389     jni_GetStringCritical,
3390     jni_ReleaseStringCritical,
3391 
3392     jni_NewWeakGlobalRef,
3393     jni_DeleteWeakGlobalRef,
3394 
3395     jni_ExceptionCheck,
3396 
3397     jni_NewDirectByteBuffer,
3398     jni_GetDirectBufferAddress,
3399     jni_GetDirectBufferCapacity,
3400 
3401     // New 1_6 features
3402 
3403     jni_GetObjectRefType,
3404 
3405     // Module features
3406 
3407     jni_GetModule,
3408 
3409     // Virtual threads
3410 
3411     jni_IsVirtualThread,
3412 
3413     // Large UTF8 support
3414 
3415     jni_GetStringUTFLengthAsLong
3416 };
3417 
3418 
3419 // For jvmti use to modify jni function table.
3420 // Java threads in native contiues to run until it is transitioned
3421 // to VM at safepoint. Before the transition or before it is blocked
3422 // for safepoint it may access jni function table. VM could crash if
3423 // any java thread access the jni function table in the middle of memcpy.
3424 // To avoid this each function pointers are copied automically.
3425 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3426   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3427   intptr_t *a = (intptr_t *) jni_functions();
3428   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3429   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3430     Atomic::store(a++, *b++);
3431   }
3432 }
3433 
3434 void quicken_jni_functions() {
3435   // Replace Get<Primitive>Field with fast versions
3436   if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3437     address func;
3438     func = JNI_FastGetField::generate_fast_get_boolean_field();
3439     if (func != (address)-1) {
3440       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3441     }
3442     func = JNI_FastGetField::generate_fast_get_byte_field();
3443     if (func != (address)-1) {
3444       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3445     }
3446     func = JNI_FastGetField::generate_fast_get_char_field();
3447     if (func != (address)-1) {
3448       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3449     }
3450     func = JNI_FastGetField::generate_fast_get_short_field();
3451     if (func != (address)-1) {
3452       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3453     }
3454     func = JNI_FastGetField::generate_fast_get_int_field();
3455     if (func != (address)-1) {
3456       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3457     }
3458     func = JNI_FastGetField::generate_fast_get_long_field();
3459     if (func != (address)-1) {
3460       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3461     }
3462     func = JNI_FastGetField::generate_fast_get_float_field();
3463     if (func != (address)-1) {
3464       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3465     }
3466     func = JNI_FastGetField::generate_fast_get_double_field();
3467     if (func != (address)-1) {
3468       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3469     }
3470   }
3471 }
3472 
3473 // Returns the function structure
3474 struct JNINativeInterface_* jni_functions() {
3475 #if INCLUDE_JNI_CHECK
3476   if (CheckJNICalls) return jni_functions_check();
3477 #endif // INCLUDE_JNI_CHECK
3478   return &jni_NativeInterface;
3479 }
3480 
3481 // Returns the function structure
3482 struct JNINativeInterface_* jni_functions_nocheck() {
3483   return &jni_NativeInterface;
3484 }
3485 
3486 
3487 // Invocation API
3488 
3489 
3490 // Forward declaration
3491 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3492 
3493 // Global invocation API vars
3494 enum VM_Creation_State {
3495   NOT_CREATED = 0,
3496   IN_PROGRESS,  // Most JNI operations are permitted during this phase to
3497                 // allow for initialization actions by libraries and agents.
3498   COMPLETE
3499 };
3500 
3501 volatile VM_Creation_State vm_created = NOT_CREATED;
3502 
3503 // Indicate whether it is safe to recreate VM. Recreation is only
3504 // possible after a failed initial creation attempt in some cases.
3505 volatile int safe_to_recreate_vm = 1;
3506 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3507 
3508 
3509 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3510 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3511 
3512 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3513                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3514 
3515 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3516   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3517   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3518   jint ret = JNI_ERR;
3519   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3520 
3521   if (Threads::is_supported_jni_version(args->version)) {
3522     ret = JNI_OK;
3523   }
3524   // 1.1 style no longer supported in hotspot.
3525   // According the JNI spec, we should update args->version on return.
3526   // We also use the structure to communicate with launcher about default
3527   // stack size.
3528   if (args->version == JNI_VERSION_1_1) {
3529     args->version = JNI_VERSION_1_2;
3530     // javaStackSize is int in arguments structure
3531     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3532     args->javaStackSize = (jint)(ThreadStackSize * K);
3533   }
3534   return ret;
3535 }
3536 
3537 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3538                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3539 
3540 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3541   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3542 
3543   jint result = JNI_ERR;
3544   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3545 
3546   // We're about to use Atomic::xchg for synchronization.  Some Zero
3547   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3548   // but __sync_lock_test_and_set is not guaranteed to do what we want
3549   // on all architectures.  So we check it works before relying on it.
3550 #if defined(ZERO) && defined(ASSERT)
3551   {
3552     jint a = 0xcafebabe;
3553     jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3554     void *c = &a;
3555     void *d = Atomic::xchg(&c, &b);
3556     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3557     assert(c == &b && d == &a, "Atomic::xchg() works");
3558   }
3559 #endif // ZERO && ASSERT
3560 
3561   // At the moment it's only possible to have one Java VM,
3562   // since some of the runtime state is in global variables.
3563 
3564   // We cannot use our mutex locks here, since they only work on
3565   // Threads. We do an atomic compare and exchange to ensure only
3566   // one thread can call this method at a time
3567 
3568   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3569   // the add/dec implementations are dependent on whether we are running
3570   // on a multiprocessor Atomic::xchg does not have this problem.
3571   if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3572     return JNI_EEXIST;   // already created, or create attempt in progress
3573   }
3574 
3575   // If a previous creation attempt failed but can be retried safely,
3576   // then safe_to_recreate_vm will have been reset to 1 after being
3577   // cleared here. If a previous creation attempt succeeded and we then
3578   // destroyed that VM, we will be prevented from trying to recreate
3579   // the VM in the same process, as the value will still be 0.
3580   if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3581     return JNI_ERR;
3582   }
3583 
3584   /**
3585    * Certain errors during initialization are recoverable and do not
3586    * prevent this method from being called again at a later time
3587    * (perhaps with different arguments).  However, at a certain
3588    * point during initialization if an error occurs we cannot allow
3589    * this function to be called again (or it will crash).  In those
3590    * situations, the 'canTryAgain' flag is set to false, which atomically
3591    * sets safe_to_recreate_vm to 1, such that any new call to
3592    * JNI_CreateJavaVM will immediately fail using the above logic.
3593    */
3594   bool can_try_again = true;
3595 
3596   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3597   if (result == JNI_OK) {
3598     JavaThread *thread = JavaThread::current();
3599     assert(!thread->has_pending_exception(), "should have returned not OK");
3600     // thread is thread_in_vm here
3601     *vm = (JavaVM *)(&main_vm);
3602     *(JNIEnv**)penv = thread->jni_environment();
3603     // mark creation complete for other JNI ops
3604     Atomic::release_store(&vm_created, COMPLETE);
3605 
3606 #if INCLUDE_JVMCI
3607     if (EnableJVMCI) {
3608       if (UseJVMCICompiler) {
3609         // JVMCI is initialized on a CompilerThread
3610         if (BootstrapJVMCI) {
3611           JavaThread* THREAD = thread; // For exception macros.
3612           JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3613           compiler->bootstrap(THREAD);
3614           if (HAS_PENDING_EXCEPTION) {
3615             HandleMark hm(THREAD);
3616             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3617           }
3618         }
3619       }
3620     }
3621 #endif
3622 
3623     // Notify JVMTI
3624     if (JvmtiExport::should_post_thread_life()) {
3625        JvmtiExport::post_thread_start(thread);
3626     }
3627 
3628     JFR_ONLY(Jfr::on_thread_start(thread);)
3629 
3630     if (ReplayCompiles) ciReplay::replay(thread);
3631 
3632 #ifdef ASSERT
3633     // Some platforms (like Win*) need a wrapper around these test
3634     // functions in order to properly handle error conditions.
3635     if (ErrorHandlerTest != 0) {
3636       VMError::controlled_crash(ErrorHandlerTest);
3637     }
3638 #endif
3639 
3640     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3641     ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3642     MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3643   } else {
3644     // If create_vm exits because of a pending exception, exit with that
3645     // exception.  In the future when we figure out how to reclaim memory,
3646     // we may be able to exit with JNI_ERR and allow the calling application
3647     // to continue.
3648     if (Universe::is_fully_initialized()) {
3649       // otherwise no pending exception possible - VM will already have aborted
3650       Thread* current = Thread::current_or_null();
3651       if (current != nullptr) {
3652         JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3653         assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3654         HandleMark hm(THREAD);
3655         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3656       }
3657     }
3658 
3659     if (can_try_again) {
3660       // reset safe_to_recreate_vm to 1 so that retrial would be possible
3661       safe_to_recreate_vm = 1;
3662     }
3663 
3664     // Creation failed. We must reset vm_created
3665     *vm = nullptr;
3666     *(JNIEnv**)penv = nullptr;
3667     // reset vm_created last to avoid race condition. Use OrderAccess to
3668     // control both compiler and architectural-based reordering.
3669     assert(vm_created == IN_PROGRESS, "must be");
3670     Atomic::release_store(&vm_created, NOT_CREATED);
3671   }
3672 
3673   // Flush stdout and stderr before exit.
3674   fflush(stdout);
3675   fflush(stderr);
3676 
3677   return result;
3678 
3679 }
3680 
3681 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3682   jint result = JNI_ERR;
3683   // On Windows, let CreateJavaVM run with SEH protection
3684 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3685   __try {
3686 #endif
3687     result = JNI_CreateJavaVM_inner(vm, penv, args);
3688 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3689   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3690     // Nothing to do.
3691   }
3692 #endif
3693   return result;
3694 }
3695 
3696 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3697   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3698 
3699   if (vm_created == COMPLETE) {
3700     if (numVMs != nullptr) *numVMs = 1;
3701     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
3702   } else {
3703     if (numVMs != nullptr) *numVMs = 0;
3704   }
3705   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3706   return JNI_OK;
3707 }
3708 
3709 extern "C" {
3710 
3711 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3712                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3713 
3714 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3715   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3716   jint res = JNI_ERR;
3717   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3718 
3719   if (vm_created == NOT_CREATED) {
3720     res = JNI_ERR;
3721     return res;
3722   }
3723 
3724   JNIEnv *env;
3725   JavaVMAttachArgs destroyargs;
3726   destroyargs.version = CurrentVersion;
3727   destroyargs.name = (char *)"DestroyJavaVM";
3728   destroyargs.group = nullptr;
3729   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3730   if (res != JNI_OK) {
3731     return res;
3732   }
3733 
3734   JavaThread* thread = JavaThread::current();
3735 
3736   // Make sure we are actually in a newly attached thread, with no
3737   // existing Java frame.
3738   if (thread->has_last_Java_frame()) {
3739     return JNI_ERR;
3740   }
3741 
3742   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3743 
3744   // We are going to VM, change W^X state to the expected one.
3745   MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3746 
3747   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3748   Threads::destroy_vm();
3749   // Don't bother restoring thread state, VM is gone.
3750   vm_created = NOT_CREATED;
3751   return JNI_OK;
3752 }
3753 
3754 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3755   jint result = JNI_ERR;
3756   // On Windows, we need SEH protection
3757 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3758   __try {
3759 #endif
3760     result = jni_DestroyJavaVM_inner(vm);
3761 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3762   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3763     // Nothing to do.
3764   }
3765 #endif
3766   return result;
3767 }
3768 
3769 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3770   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3771 
3772   // Check below commented out from JDK1.2fcs as well
3773   /*
3774   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3775     return JNI_EVERSION;
3776   }
3777   */
3778 
3779   Thread* t = Thread::current_or_null();
3780   if (t != nullptr) {
3781     // If executing from an atexit hook we may be in the VMThread.
3782     if (t->is_Java_thread()) {
3783       // If the thread has been attached this operation is a no-op
3784       *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3785       return JNI_OK;
3786     } else {
3787       return JNI_ERR;
3788     }
3789   }
3790 
3791   // Create a thread and mark it as attaching so it will be skipped by the
3792   // ThreadsListEnumerator - see CR 6404306
3793   JavaThread* thread = JavaThread::create_attaching_thread();
3794 
3795   // Set correct safepoint info. The thread is going to call into Java when
3796   // initializing the Java level thread object. Hence, the correct state must
3797   // be set in order for the Safepoint code to deal with it correctly.
3798   thread->set_thread_state(_thread_in_vm);
3799   thread->record_stack_base_and_size();
3800   thread->register_thread_stack_with_NMT();
3801   thread->initialize_thread_current();
3802   MACOS_AARCH64_ONLY(thread->init_wx());
3803 
3804   if (!os::create_attached_thread(thread)) {
3805     thread->smr_delete();
3806     return JNI_ERR;
3807   }
3808   // Enable stack overflow checks
3809   thread->stack_overflow_state()->create_stack_guard_pages();
3810 
3811   thread->initialize_tlab();
3812 
3813   thread->cache_global_variables();
3814 
3815   // This thread will not do a safepoint check, since it has
3816   // not been added to the Thread list yet.
3817   { MutexLocker ml(Threads_lock);
3818     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3819     // avoid this thread trying to do a GC before it is added to the thread-list
3820     thread->set_active_handles(JNIHandleBlock::allocate_block());
3821     Threads::add(thread, daemon);
3822   }
3823   // Create thread group and name info from attach arguments
3824   oop group = nullptr;
3825   char* thread_name = nullptr;
3826   if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3827     group = JNIHandles::resolve(args->group);
3828     thread_name = args->name; // may be null
3829   }
3830   if (group == nullptr) group = Universe::main_thread_group();
3831 
3832   // Create Java level thread object and attach it to this thread
3833   bool attach_failed = false;
3834   {
3835     EXCEPTION_MARK;
3836     HandleMark hm(THREAD);
3837     Handle thread_group(THREAD, group);
3838     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3839     if (HAS_PENDING_EXCEPTION) {
3840       CLEAR_PENDING_EXCEPTION;
3841       // cleanup outside the handle mark.
3842       attach_failed = true;
3843     }
3844   }
3845 
3846   if (attach_failed) {
3847     // Added missing cleanup
3848     thread->cleanup_failed_attach_current_thread(daemon);
3849     return JNI_ERR;
3850   }
3851 
3852   // mark the thread as no longer attaching
3853   // this uses a fence to push the change through so we don't have
3854   // to regrab the threads_lock
3855   thread->set_done_attaching_via_jni();
3856 
3857   // Set java thread status.
3858   java_lang_Thread::set_thread_status(thread->threadObj(),
3859               JavaThreadStatus::RUNNABLE);
3860 
3861   // Notify the debugger
3862   if (JvmtiExport::should_post_thread_life()) {
3863     JvmtiExport::post_thread_start(thread);
3864   }
3865 
3866   JFR_ONLY(Jfr::on_thread_start(thread);)
3867 
3868   *(JNIEnv**)penv = thread->jni_environment();
3869 
3870   // Now leaving the VM, so change thread_state. This is normally automatically taken care
3871   // of in the JVM_ENTRY. But in this situation we have to do it manually.
3872   ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3873   MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3874 
3875   // Perform any platform dependent FPU setup
3876   os::setup_fpu();
3877 
3878   return JNI_OK;
3879 }
3880 
3881 
3882 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3883   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3884   if (vm_created == NOT_CREATED) {
3885     // Not sure how we could possibly get here.
3886     HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3887     return JNI_ERR;
3888   }
3889 
3890   jint ret = attach_current_thread(vm, penv, _args, false);
3891   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3892   return ret;
3893 }
3894 
3895 
3896 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
3897   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3898   if (vm_created == NOT_CREATED) {
3899     // Not sure how we could possibly get here.
3900     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3901     return JNI_ERR;
3902   }
3903 
3904   Thread* current = Thread::current_or_null();
3905 
3906   // If the thread has already been detached the operation is a no-op
3907   if (current == nullptr) {
3908     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3909     return JNI_OK;
3910   }
3911 
3912   // If executing from an atexit hook we may be in the VMThread.
3913   if (!current->is_Java_thread()) {
3914     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3915     return JNI_ERR;
3916   }
3917 
3918   VM_Exit::block_if_vm_exited();
3919 
3920   JavaThread* thread = JavaThread::cast(current);
3921   if (thread->has_last_Java_frame()) {
3922     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3923     // Can't detach a thread that's running java, that can't work.
3924     return JNI_ERR;
3925   }
3926 
3927   // We are going to VM, change W^X state to the expected one.
3928   MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
3929 
3930   // Safepoint support. Have to do call-back to safepoint code, if in the
3931   // middle of a safepoint operation
3932   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3933 
3934   // XXX: Note that JavaThread::exit() call below removes the guards on the
3935   // stack pages set up via enable_stack_{red,yellow}_zone() calls
3936   // above in jni_AttachCurrentThread. Unfortunately, while the setting
3937   // of the guards is visible in jni_AttachCurrentThread above,
3938   // the removal of the guards is buried below in JavaThread::exit()
3939   // here. The abstraction should be more symmetrically either exposed
3940   // or hidden (e.g. it could probably be hidden in the same
3941   // (platform-dependent) methods where we do alternate stack
3942   // maintenance work?)
3943   thread->exit(false, JavaThread::jni_detach);
3944   thread->smr_delete();
3945 
3946   // Go to the execute mode, the initial state of the thread on creation.
3947   // Use os interface as the thread is not a JavaThread anymore.
3948   MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
3949 
3950   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3951   return JNI_OK;
3952 }
3953 
3954 DT_RETURN_MARK_DECL(GetEnv, jint
3955                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
3956 
3957 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
3958   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
3959   jint ret = JNI_ERR;
3960   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
3961 
3962   if (vm_created == NOT_CREATED) {
3963     *penv = nullptr;
3964     ret = JNI_EDETACHED;
3965     return ret;
3966   }
3967 
3968   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
3969     return ret;
3970   }
3971 
3972 #ifndef JVMPI_VERSION_1
3973 // need these in order to be polite about older agents
3974 #define JVMPI_VERSION_1   ((jint)0x10000001)
3975 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
3976 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
3977 #endif // !JVMPI_VERSION_1
3978 
3979   Thread* thread = Thread::current_or_null();
3980   if (thread != nullptr && thread->is_Java_thread()) {
3981     if (Threads::is_supported_jni_version_including_1_1(version)) {
3982       *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
3983       ret = JNI_OK;
3984       return ret;
3985 
3986     } else if (version == JVMPI_VERSION_1 ||
3987                version == JVMPI_VERSION_1_1 ||
3988                version == JVMPI_VERSION_1_2) {
3989       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
3990       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
3991       ret = JNI_EVERSION;
3992       return ret;
3993     } else if (JvmtiExport::is_jvmdi_version(version)) {
3994       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
3995       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
3996       ret = JNI_EVERSION;
3997       return ret;
3998     } else {
3999       *penv = nullptr;
4000       ret = JNI_EVERSION;
4001       return ret;
4002     }
4003   } else {
4004     *penv = nullptr;
4005     ret = JNI_EDETACHED;
4006     return ret;
4007   }
4008 }
4009 
4010 
4011 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4012   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4013   if (vm_created == NOT_CREATED) {
4014     // Not sure how we could possibly get here.
4015     HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4016     return JNI_ERR;
4017   }
4018 
4019   jint ret = attach_current_thread(vm, penv, _args, true);
4020   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4021   return ret;
4022 }
4023 
4024 
4025 } // End extern "C"
4026 
4027 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4028     nullptr,
4029     nullptr,
4030     nullptr,
4031 
4032     jni_DestroyJavaVM,
4033     jni_AttachCurrentThread,
4034     jni_DetachCurrentThread,
4035     jni_GetEnv,
4036     jni_AttachCurrentThreadAsDaemon
4037 };