1 /*
   2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012 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/flatArrayOop.inline.hpp"
  59 #include "oops/inlineKlass.inline.hpp"
  60 #include "oops/instanceKlass.inline.hpp"
  61 #include "oops/instanceOop.hpp"
  62 #include "oops/klass.inline.hpp"
  63 #include "oops/markWord.hpp"
  64 #include "oops/method.hpp"
  65 #include "oops/objArrayKlass.hpp"
  66 #include "oops/objArrayOop.inline.hpp"
  67 #include "oops/oop.inline.hpp"
  68 #include "oops/symbol.hpp"
  69 #include "oops/typeArrayKlass.hpp"
  70 #include "oops/typeArrayOop.inline.hpp"
  71 #include "prims/jniCheck.hpp"
  72 #include "prims/jniExport.hpp"
  73 #include "prims/jniFastGetField.hpp"
  74 #include "prims/jvm_misc.hpp"
  75 #include "prims/jvmtiExport.hpp"
  76 #include "prims/jvmtiThreadState.hpp"
  77 #include "runtime/arguments.hpp"
  78 #include "runtime/atomic.hpp"
  79 #include "runtime/fieldDescriptor.inline.hpp"
  80 #include "runtime/handles.inline.hpp"
  81 #include "runtime/interfaceSupport.inline.hpp"
  82 #include "runtime/java.hpp"
  83 #include "runtime/javaCalls.hpp"
  84 #include "runtime/javaThread.inline.hpp"
  85 #include "runtime/jfieldIDWorkaround.hpp"
  86 #include "runtime/jniHandles.inline.hpp"
  87 #include "runtime/reflection.hpp"
  88 #include "runtime/safepointVerifiers.hpp"
  89 #include "runtime/sharedRuntime.hpp"
  90 #include "runtime/signature.hpp"
  91 #include "runtime/synchronizer.hpp"
  92 #include "runtime/thread.inline.hpp"
  93 #include "runtime/vmOperations.hpp"
  94 #include "services/runtimeService.hpp"
  95 #include "utilities/defaultStream.hpp"
  96 #include "utilities/dtrace.hpp"
  97 #include "utilities/events.hpp"
  98 #include "utilities/macros.hpp"
  99 #include "utilities/vmError.hpp"
 100 #if INCLUDE_JVMCI
 101 #include "jvmci/jvmciCompiler.hpp"
 102 #endif
 103 #if INCLUDE_JFR
 104 #include "jfr/jfr.hpp"
 105 #endif
 106 
 107 static jint CurrentVersion = JNI_VERSION_21;
 108 
 109 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
 110 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
 111 #endif
 112 
 113 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
 114 // '-return' probe regardless of the return path is taken out of the function.
 115 // Methods that have multiple return paths use this to avoid having to
 116 // instrument each return path.  Methods that use CHECK or THROW must use this
 117 // since those macros can cause an immediate uninstrumented return.
 118 //
 119 // In order to get the return value, a reference to the variable containing
 120 // the return value must be passed to the constructor of the object, and
 121 // the return value must be set before return (since the mark object has
 122 // a reference to it).
 123 //
 124 // Example:
 125 // DT_RETURN_MARK_DECL(SomeFunc, int);
 126 // JNI_ENTRY(int, SomeFunc, ...)
 127 //   int return_value = 0;
 128 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 129 //   foo(CHECK_0)
 130 //   return_value = 5;
 131 //   return return_value;
 132 // JNI_END
 133 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 134   DTRACE_ONLY(                                                             \
 135     class DTraceReturnProbeMark_##name {                                   \
 136      public:                                                               \
 137       const type& _ret_ref;                                                \
 138       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 139       ~DTraceReturnProbeMark_##name() {                                    \
 140         probe;                                                             \
 141       }                                                                    \
 142     }                                                                      \
 143   )
 144 // Void functions are simpler since there's no return value
 145 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 146   DTRACE_ONLY(                                                             \
 147     class DTraceReturnProbeMark_##name {                                   \
 148      public:                                                               \
 149       ~DTraceReturnProbeMark_##name() {                                    \
 150         probe;                                                             \
 151       }                                                                    \
 152     }                                                                      \
 153   )
 154 
 155 // Place these macros in the function to mark the return.  Non-void
 156 // functions need the type and address of the return value.
 157 #define DT_RETURN_MARK(name, type, ref) \
 158   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 159 #define DT_VOID_RETURN_MARK(name) \
 160   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 161 
 162 
 163 // Use these to select distinct code for floating-point vs. non-floating point
 164 // situations.  Used from within common macros where we need slightly
 165 // different behavior for Float/Double
 166 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 167 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 168 #define FP_SELECT_Char(intcode, fpcode)    intcode
 169 #define FP_SELECT_Short(intcode, fpcode)   intcode
 170 #define FP_SELECT_Object(intcode, fpcode)  intcode
 171 #define FP_SELECT_Int(intcode, fpcode)     intcode
 172 #define FP_SELECT_Long(intcode, fpcode)    intcode
 173 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 174 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 175 #define FP_SELECT(TypeName, intcode, fpcode) \
 176   FP_SELECT_##TypeName(intcode, fpcode)
 177 
 178 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 179 // (dtrace doesn't do FP yet)
 180 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 181   FP_SELECT(TypeName, \
 182     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 183 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 184   FP_SELECT(TypeName, \
 185     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 186 
 187 
 188 // out-of-line helpers for class jfieldIDWorkaround:
 189 
 190 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 191   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 192     uintptr_t as_uint = (uintptr_t) id;
 193     int offset = raw_instance_offset(id);
 194     if (is_checked_jfieldID(id)) {
 195       if (!klass_hash_ok(k, id)) {
 196         return false;
 197       }
 198     }
 199     return InstanceKlass::cast(k)->contains_field_offset(offset);
 200   } else {
 201     JNIid* result = (JNIid*) id;
 202 #ifdef ASSERT
 203     return result != nullptr && result->is_static_field_id();
 204 #else
 205     return result != nullptr;
 206 #endif
 207   }
 208 }
 209 
 210 
 211 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, int offset) {
 212   if (offset <= small_offset_mask) {
 213     Klass* field_klass = k;
 214     Klass* super_klass = field_klass->super();
 215     // With compressed oops the most super class with nonstatic fields would
 216     // be the owner of fields embedded in the header.
 217     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 218            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 219       field_klass = super_klass;   // super contains the field also
 220       super_klass = field_klass->super();
 221     }
 222     debug_only(NoSafepointVerifier nosafepoint;)
 223     uintptr_t klass_hash = field_klass->identity_hash();
 224     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 225   } else {
 226 #if 0
 227     #ifndef PRODUCT
 228     {
 229       ResourceMark rm;
 230       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 231     }
 232     #endif
 233 #endif
 234     return 0;
 235   }
 236 }
 237 
 238 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 239   uintptr_t as_uint = (uintptr_t) id;
 240   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 241   do {
 242     debug_only(NoSafepointVerifier nosafepoint;)
 243     // Could use a non-blocking query for identity_hash here...
 244     if ((k->identity_hash() & klass_mask) == klass_hash)
 245       return true;
 246     k = k->super();
 247   } while (k != nullptr);
 248   return false;
 249 }
 250 
 251 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 252   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 253   uintptr_t as_uint = (uintptr_t) id;
 254   int offset = raw_instance_offset(id);
 255   if (VerifyJNIFields) {
 256     if (is_checked_jfieldID(id)) {
 257       guarantee(klass_hash_ok(k, id),
 258     "Bug in native code: jfieldID class must match object");
 259     } else {
 260 #if 0
 261       #ifndef PRODUCT
 262       if (Verbose) {
 263   ResourceMark rm;
 264   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 265       }
 266       #endif
 267 #endif
 268     }
 269   }
 270   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 271       "Bug in native code: jfieldID offset must address interior of object");
 272 }
 273 
 274 // Implementation of JNI entries
 275 
 276 DT_RETURN_MARK_DECL(DefineClass, jclass
 277                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 278 
 279 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 280                                   const jbyte *buf, jsize bufLen))
 281   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 282     env, (char*) name, loaderRef, (char*) buf, bufLen);
 283 
 284   jclass cls = nullptr;
 285   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 286 
 287   // Class resolution will get the class name from the .class stream if the name is null.
 288   TempNewSymbol class_name = name == nullptr ? nullptr :
 289     SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
 290                                         CHECK_NULL);
 291 
 292   ResourceMark rm(THREAD);
 293   ClassFileStream st((u1*)buf, bufLen, nullptr, ClassFileStream::verify);
 294   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 295   Handle protection_domain;
 296   ClassLoadInfo cl_info(protection_domain);
 297   Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
 298                                                    class_loader,
 299                                                    cl_info,
 300                                                    CHECK_NULL);
 301 
 302   if (log_is_enabled(Debug, class, resolve)) {
 303     trace_class_resolution(k);
 304   }
 305 
 306   cls = (jclass)JNIHandles::make_local(THREAD, k->java_mirror());
 307   return cls;
 308 JNI_END
 309 
 310 
 311 
 312 DT_RETURN_MARK_DECL(FindClass, jclass
 313                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 314 
 315 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 316   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 317 
 318   jclass result = nullptr;
 319   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 320 
 321   // This should be ClassNotFoundException imo.
 322   TempNewSymbol class_name =
 323     SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
 324                                         CHECK_NULL);
 325 
 326   //%note jni_3
 327   Handle protection_domain;
 328   // Find calling class
 329   Klass* k = thread->security_get_caller_class(0);
 330   // default to the system loader when no context
 331   Handle loader(THREAD, SystemDictionary::java_system_loader());
 332   if (k != nullptr) {
 333     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 334     // in the correct class context.
 335     if (k->class_loader() == nullptr &&
 336         k->name() == vmSymbols::jdk_internal_loader_NativeLibraries()) {
 337       JavaValue result(T_OBJECT);
 338       JavaCalls::call_static(&result, k,
 339                              vmSymbols::getFromClass_name(),
 340                              vmSymbols::void_class_signature(),
 341                              CHECK_NULL);
 342       // When invoked from JNI_OnLoad, NativeLibraries::getFromClass returns
 343       // a non-null Class object.  When invoked from JNI_OnUnload,
 344       // it will return null to indicate no context.
 345       oop mirror = result.get_oop();
 346       if (mirror != nullptr) {
 347         Klass* fromClass = java_lang_Class::as_Klass(mirror);
 348         loader = Handle(THREAD, fromClass->class_loader());
 349         protection_domain = Handle(THREAD, fromClass->protection_domain());
 350       }
 351     } else {
 352       loader = Handle(THREAD, k->class_loader());
 353     }
 354   }
 355 
 356   result = find_class_from_class_loader(env, class_name, true, loader,
 357                                         protection_domain, true, thread);
 358 
 359   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
 360     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 361   }
 362 
 363   return result;
 364 JNI_END
 365 
 366 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 367                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 368 
 369 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 370   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 371 
 372   jmethodID ret = nullptr;
 373   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 374 
 375   // method is a handle to a java.lang.reflect.Method object
 376   oop reflected  = JNIHandles::resolve_non_null(method);
 377   oop mirror     = nullptr;
 378   int slot       = 0;
 379 
 380   if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
 381     mirror = java_lang_reflect_Constructor::clazz(reflected);
 382     slot   = java_lang_reflect_Constructor::slot(reflected);
 383   } else {
 384     assert(reflected->klass() == vmClasses::reflect_Method_klass(), "wrong type");
 385     mirror = java_lang_reflect_Method::clazz(reflected);
 386     slot   = java_lang_reflect_Method::slot(reflected);
 387   }
 388   Klass* k1 = java_lang_Class::as_Klass(mirror);
 389 
 390   // Make sure class is initialized before handing id's out to methods
 391   k1->initialize(CHECK_NULL);
 392   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 393   ret = m==nullptr? nullptr : m->jmethod_id();  // return null if reflected method deleted
 394   return ret;
 395 JNI_END
 396 
 397 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 398                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 399 
 400 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 401   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 402 
 403   jfieldID ret = nullptr;
 404   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 405 
 406   // field is a handle to a java.lang.reflect.Field object
 407   oop reflected   = JNIHandles::resolve_non_null(field);
 408   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 409   Klass* k1       = java_lang_Class::as_Klass(mirror);
 410   int slot        = java_lang_reflect_Field::slot(reflected);
 411   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 412 
 413   // Make sure class is initialized before handing id's out to fields
 414   k1->initialize(CHECK_NULL);
 415 
 416   // First check if this is a static field
 417   if (modifiers & JVM_ACC_STATIC) {
 418     int offset = InstanceKlass::cast(k1)->field_offset( slot );
 419     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 420     assert(id != nullptr, "corrupt Field object");
 421     debug_only(id->set_is_static_field_id();)
 422     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 423     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 424     return ret;
 425   }
 426 
 427   // The slot is the index of the field description in the field-array
 428   // The jfieldID is the offset of the field within the object
 429   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 430   int offset = InstanceKlass::cast(k1)->field_offset( slot );
 431   bool is_flat = InstanceKlass::cast(k1)->field_is_flat(slot);
 432   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 433   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset, is_flat);
 434   return ret;
 435 JNI_END
 436 
 437 
 438 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 439                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 440 
 441 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 442   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 443 
 444   jobject ret = nullptr;
 445   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 446 
 447   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 448   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 449   oop reflection_method;
 450   if (m->is_object_constructor()) {
 451     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 452   } else {
 453     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 454   }
 455   ret = JNIHandles::make_local(THREAD, reflection_method);
 456   return ret;
 457 JNI_END
 458 
 459 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 460                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 461 
 462 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 463   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 464 
 465   jclass obj = nullptr;
 466   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 467 
 468   oop mirror = JNIHandles::resolve_non_null(sub);
 469   // primitive classes return null
 470   if (java_lang_Class::is_primitive(mirror)) return nullptr;
 471 
 472   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 473   // arrays return Object
 474   // interfaces return null
 475   // proper classes return Klass::super()
 476   Klass* k = java_lang_Class::as_Klass(mirror);
 477   if (k->is_interface()) return nullptr;
 478 
 479   // return mirror for superclass
 480   Klass* super = k->java_super();
 481   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 482   debug_only(Klass* super2 = ( k->is_array_klass()
 483                                  ? vmClasses::Object_klass()
 484                                  : k->super() ) );
 485   assert(super == super2,
 486          "java_super computation depends on interface, array, other super");
 487   obj = (super == nullptr) ? nullptr : (jclass) JNIHandles::make_local(THREAD, super->java_mirror());
 488   return obj;
 489 JNI_END
 490 
 491 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 492   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 493 
 494   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 495   oop super_mirror = JNIHandles::resolve_non_null(super);
 496   if (java_lang_Class::is_primitive(sub_mirror) ||
 497       java_lang_Class::is_primitive(super_mirror)) {
 498     jboolean ret = (sub_mirror == super_mirror);
 499 
 500     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 501     return ret;
 502   }
 503   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 504   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 505   assert(sub_klass != nullptr && super_klass != nullptr, "invalid arguments to jni_IsAssignableFrom");
 506   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 507                    JNI_TRUE : JNI_FALSE;
 508 
 509   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 510   return ret;
 511 JNI_END
 512 
 513 
 514 DT_RETURN_MARK_DECL(Throw, jint
 515                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 516 
 517 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 518   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 519 
 520   jint ret = JNI_OK;
 521   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 522 
 523   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 524   ShouldNotReachHere();
 525   return 0;  // Mute compiler.
 526 JNI_END
 527 
 528 
 529 DT_RETURN_MARK_DECL(ThrowNew, jint
 530                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 531 
 532 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 533   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 534 
 535   jint ret = JNI_OK;
 536   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 537 
 538   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 539   Symbol*  name = k->name();
 540   Handle class_loader (THREAD,  k->class_loader());
 541   Handle protection_domain (THREAD, k->protection_domain());
 542   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 543   ShouldNotReachHere();
 544   return 0;  // Mute compiler.
 545 JNI_END
 546 
 547 
 548 // JNI functions only transform a pending async exception to a synchronous
 549 // exception in ExceptionOccurred and ExceptionCheck calls, since
 550 // delivering an async exception in other places won't change the native
 551 // code's control flow and would be harmful when native code further calls
 552 // JNI functions with a pending exception. Async exception is also checked
 553 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 554 // false but deliver the async exception at the very end during
 555 // state transition.
 556 
 557 static void jni_check_async_exceptions(JavaThread *thread) {
 558   assert(thread == Thread::current(), "must be itself");
 559   if (thread->has_async_exception_condition()) {
 560     SafepointMechanism::process_if_requested_with_exit_check(thread, true /* check asyncs */);
 561   }
 562 }
 563 
 564 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 565   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 566 
 567   jni_check_async_exceptions(thread);
 568   oop exception = thread->pending_exception();
 569   jthrowable ret = (jthrowable) JNIHandles::make_local(THREAD, exception);
 570 
 571   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 572   return ret;
 573 JNI_END
 574 
 575 
 576 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 577   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 578 
 579   if (thread->has_pending_exception()) {
 580     Handle ex(thread, thread->pending_exception());
 581     thread->clear_pending_exception();
 582     jio_fprintf(defaultStream::error_stream(), "Exception ");
 583     if (thread != nullptr && thread->threadObj() != nullptr) {
 584       ResourceMark rm(THREAD);
 585       jio_fprintf(defaultStream::error_stream(),
 586                   "in thread \"%s\" ", thread->name());
 587     }
 588     if (ex->is_a(vmClasses::Throwable_klass())) {
 589       JavaValue result(T_VOID);
 590       JavaCalls::call_virtual(&result,
 591                               ex,
 592                               vmClasses::Throwable_klass(),
 593                               vmSymbols::printStackTrace_name(),
 594                               vmSymbols::void_method_signature(),
 595                               THREAD);
 596       // If an exception is thrown in the call it gets thrown away. Not much
 597       // we can do with it. The native code that calls this, does not check
 598       // for the exception - hence, it might still be in the thread when DestroyVM gets
 599       // called, potentially causing a few asserts to trigger - since no pending exception
 600       // is expected.
 601       CLEAR_PENDING_EXCEPTION;
 602     } else {
 603       ResourceMark rm(THREAD);
 604       jio_fprintf(defaultStream::error_stream(),
 605                   ". Uncaught exception of type %s.",
 606                   ex->klass()->external_name());
 607     }
 608   }
 609 
 610   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 611 JNI_END
 612 
 613 
 614 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionClear(JNIEnv *env))
 615   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 616 
 617   // The jni code might be using this API to clear java thrown exception.
 618   // So just mark jvmti thread exception state as exception caught.
 619   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 620   if (state != nullptr && state->is_exception_detected()) {
 621     state->set_exception_caught();
 622   }
 623   thread->clear_pending_exception();
 624 
 625   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 626 JNI_END
 627 
 628 
 629 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 630   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 631 
 632   tty->print_cr("FATAL ERROR in native method: %s", msg);
 633   thread->print_jni_stack();
 634   os::abort(); // Dump core and abort
 635 JNI_END
 636 
 637 
 638 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 639   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 640 
 641   //%note jni_11
 642   if (capacity < 0 ||
 643       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 644     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 645     return JNI_ERR;
 646   }
 647 
 648   thread->push_jni_handle_block();
 649   jint ret = JNI_OK;
 650   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 651   return ret;
 652 JNI_END
 653 
 654 
 655 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 656   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 657 
 658   //%note jni_11
 659   Handle result_handle(thread, JNIHandles::resolve(result));
 660   JNIHandleBlock* old_handles = thread->active_handles();
 661   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 662   if (new_handles != nullptr) {
 663     // As a sanity check we only release the handle blocks if the pop_frame_link is not null.
 664     // This way code will still work if PopLocalFrame is called without a corresponding
 665     // PushLocalFrame call. Note that we set the pop_frame_link to null explicitly, otherwise
 666     // the release_block call will release the blocks.
 667     thread->set_active_handles(new_handles);
 668     old_handles->set_pop_frame_link(nullptr);              // clear link we won't release new_handles below
 669     JNIHandleBlock::release_block(old_handles, thread); // may block
 670     result = JNIHandles::make_local(thread, result_handle());
 671   }
 672   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 673   return result;
 674 JNI_END
 675 
 676 
 677 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 678   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 679 
 680   Handle ref_handle(thread, JNIHandles::resolve(ref));
 681   jobject ret = JNIHandles::make_global(ref_handle, AllocFailStrategy::RETURN_NULL);
 682 
 683   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 684   return ret;
 685 JNI_END
 686 
 687 // Must be JNI_ENTRY (with HandleMark)
 688 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 689   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 690 
 691   JNIHandles::destroy_global(ref);
 692 
 693   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 694 JNI_END
 695 
 696 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 697   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 698 
 699   JNIHandles::destroy_local(obj);
 700 
 701   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 702 JNI_END
 703 
 704 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 705   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 706 
 707   jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
 708 
 709   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 710   return ret;
 711 JNI_END
 712 
 713 
 714 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 715   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 716 
 717   jobject ret = JNIHandles::make_local(THREAD, JNIHandles::resolve(ref),
 718                                        AllocFailStrategy::RETURN_NULL);
 719 
 720   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 721   return ret;
 722 JNI_END
 723 
 724 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 725   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 726 
 727   jint ret;
 728   if (capacity >= 0 &&
 729       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 730     ret = JNI_OK;
 731   } else {
 732     ret = JNI_ERR;
 733   }
 734 
 735   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 736   return ret;
 737 JNI_END
 738 
 739 // Return the Handle Type
 740 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 741   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 742 
 743   jobjectRefType ret = JNIInvalidRefType;
 744   if (obj != nullptr) {
 745     ret = JNIHandles::handle_type(thread, obj);
 746   }
 747 
 748   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 749   return ret;
 750 JNI_END
 751 
 752 
 753 class JNI_ArgumentPusher : public SignatureIterator {
 754  protected:
 755   JavaCallArguments*  _arguments;
 756 
 757   void push_int(jint x)         { _arguments->push_int(x); }
 758   void push_long(jlong x)       { _arguments->push_long(x); }
 759   void push_float(jfloat x)     { _arguments->push_float(x); }
 760   void push_double(jdouble x)   { _arguments->push_double(x); }
 761   void push_object(jobject x)   { _arguments->push_jobject(x); }
 762 
 763   void push_boolean(jboolean b) {
 764     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 765     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 766     // TemplateInterpreterGenerator::generate_result_handler_for and
 767     // SharedRuntime::generate_native_wrapper.
 768     push_int(b == 0 ? JNI_FALSE : JNI_TRUE);
 769   }
 770 
 771   JNI_ArgumentPusher(Method* method)
 772     : SignatureIterator(method->signature(),
 773                         Fingerprinter(methodHandle(Thread::current(), method)).fingerprint())
 774   {
 775     _arguments = nullptr;
 776   }
 777 
 778  public:
 779   virtual void push_arguments_on(JavaCallArguments* arguments) = 0;
 780 };
 781 
 782 
 783 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 784   va_list _ap;
 785 
 786   void set_ap(va_list rap) {
 787     va_copy(_ap, rap);
 788   }
 789 
 790   friend class SignatureIterator;  // so do_parameters_on can call do_type
 791   void do_type(BasicType type) {
 792     switch (type) {
 793     // these are coerced to int when using va_arg
 794     case T_BYTE:
 795     case T_CHAR:
 796     case T_SHORT:
 797     case T_INT:         push_int(va_arg(_ap, jint)); break;
 798     case T_BOOLEAN:     push_boolean((jboolean) va_arg(_ap, jint)); break;
 799 
 800     // each of these paths is exercised by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 801 
 802     case T_LONG:        push_long(va_arg(_ap, jlong)); break;
 803     // float is coerced to double w/ va_arg
 804     case T_FLOAT:       push_float((jfloat) va_arg(_ap, jdouble)); break;
 805     case T_DOUBLE:      push_double(va_arg(_ap, jdouble)); break;
 806 
 807     case T_ARRAY:
 808     case T_OBJECT: push_object(va_arg(_ap, jobject)); break;
 809     default:            ShouldNotReachHere();
 810     }
 811   }
 812 
 813  public:
 814   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 815       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
 816     set_ap(rap);
 817   }
 818 
 819   ~JNI_ArgumentPusherVaArg() {
 820     va_end(_ap);
 821   }
 822 
 823   virtual void push_arguments_on(JavaCallArguments* arguments) {
 824     _arguments = arguments;
 825     do_parameters_on(this);
 826   }
 827 };
 828 
 829 
 830 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
 831  protected:
 832   const jvalue *_ap;
 833 
 834   inline void set_ap(const jvalue *rap) { _ap = rap; }
 835 
 836   friend class SignatureIterator;  // so do_parameters_on can call do_type
 837   void do_type(BasicType type) {
 838     switch (type) {
 839     case T_CHAR:        push_int((_ap++)->c); break;
 840     case T_SHORT:       push_int((_ap++)->s); break;
 841     case T_BYTE:        push_int((_ap++)->b); break;
 842     case T_INT:         push_int((_ap++)->i); break;
 843     case T_BOOLEAN:     push_boolean((_ap++)->z); break;
 844     case T_LONG:        push_long((_ap++)->j); break;
 845     case T_FLOAT:       push_float((_ap++)->f); break;
 846     case T_DOUBLE:      push_double((_ap++)->d); break;
 847     case T_ARRAY:
 848     case T_OBJECT:
 849     case T_PRIMITIVE_OBJECT: push_object((_ap++)->l); break;
 850     default:            ShouldNotReachHere();
 851     }
 852   }
 853 
 854  public:
 855   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
 856       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)) {
 857     set_ap(rap);
 858   }
 859 
 860   virtual void push_arguments_on(JavaCallArguments* arguments) {
 861     _arguments = arguments;
 862     do_parameters_on(this);
 863   }
 864 };
 865 
 866 
 867 enum JNICallType {
 868   JNI_STATIC,
 869   JNI_VIRTUAL,
 870   JNI_NONVIRTUAL
 871 };
 872 
 873 
 874 
 875 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
 876   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
 877 
 878   // Create object to hold arguments for the JavaCall, and associate it with
 879   // the jni parser
 880   ResourceMark rm(THREAD);
 881   int number_of_parameters = method->size_of_parameters();
 882   JavaCallArguments java_args(number_of_parameters);
 883 
 884   assert(method->is_static(), "method should be static");
 885 
 886   // Fill out JavaCallArguments object
 887   args->push_arguments_on(&java_args);
 888   // Initialize result type
 889   result->set_type(args->return_type());
 890 
 891   // Invoke the method. Result is returned as oop.
 892   JavaCalls::call(result, method, &java_args, CHECK);
 893 
 894   // Convert result
 895   if (is_reference_type(result->get_type())) {
 896     result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
 897   }
 898 }
 899 
 900 
 901 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
 902   oop recv = JNIHandles::resolve(receiver);
 903   if (recv == nullptr) {
 904     THROW(vmSymbols::java_lang_NullPointerException());
 905   }
 906   Handle h_recv(THREAD, recv);
 907 
 908   int number_of_parameters;
 909   Method* selected_method;
 910   {
 911     Method* m = Method::resolve_jmethod_id(method_id);
 912     number_of_parameters = m->size_of_parameters();
 913     InstanceKlass* holder = m->method_holder();
 914     if (call_type != JNI_VIRTUAL) {
 915         selected_method = m;
 916     } else if (!m->has_itable_index()) {
 917       // non-interface call -- for that little speed boost, don't handlize
 918       debug_only(NoSafepointVerifier nosafepoint;)
 919       // jni_GetMethodID makes sure class is linked and initialized
 920       // so m should have a valid vtable index.
 921       assert(m->valid_vtable_index(), "no valid vtable index");
 922       int vtbl_index = m->vtable_index();
 923       if (vtbl_index != Method::nonvirtual_vtable_index) {
 924         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
 925       } else {
 926         // final method
 927         selected_method = m;
 928       }
 929     } else {
 930       // interface call
 931       int itbl_index = m->itable_index();
 932       Klass* k = h_recv->klass();
 933       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
 934     }
 935   }
 936 
 937   methodHandle method(THREAD, selected_method);
 938 
 939   // Create object to hold arguments for the JavaCall, and associate it with
 940   // the jni parser
 941   ResourceMark rm(THREAD);
 942   JavaCallArguments java_args(number_of_parameters);
 943 
 944   // handle arguments
 945   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
 946   java_args.push_oop(h_recv); // Push jobject handle
 947 
 948   // Fill out JavaCallArguments object
 949   args->push_arguments_on(&java_args);
 950   // Initialize result type
 951   result->set_type(args->return_type());
 952 
 953   // Invoke the method. Result is returned as oop.
 954   JavaCalls::call(result, method, &java_args, CHECK);
 955 
 956   // Convert result
 957   if (is_reference_type(result->get_type())) {
 958     result->set_jobject(JNIHandles::make_local(THREAD, result->get_oop()));
 959   }
 960 }
 961 
 962 DT_RETURN_MARK_DECL(AllocObject, jobject
 963                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
 964 
 965 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
 966   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
 967 
 968   jobject ret = nullptr;
 969   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
 970 
 971   oop clazzoop = JNIHandles::resolve_non_null(clazz);
 972   Klass* k = java_lang_Class::as_Klass(clazzoop);
 973   if (k == nullptr || k->is_inline_klass()) {
 974     ResourceMark rm(THREAD);
 975     THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
 976   }
 977   instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
 978   ret = JNIHandles::make_local(THREAD, i);
 979   return ret;
 980 JNI_END
 981 
 982 DT_RETURN_MARK_DECL(NewObjectA, jobject
 983                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
 984 
 985 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
 986   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
 987 
 988   jobject obj = nullptr;
 989   DT_RETURN_MARK(NewObjectA, jobject, (const jobject&)obj);
 990 
 991   oop clazzoop = JNIHandles::resolve_non_null(clazz);
 992   Klass* k = java_lang_Class::as_Klass(clazzoop);
 993   if (k == nullptr) {
 994     ResourceMark rm(THREAD);
 995     THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
 996   }
 997 
 998   instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
 999   obj = JNIHandles::make_local(THREAD, i);
1000   JavaValue jvalue(T_VOID);
1001   JNI_ArgumentPusherArray ap(methodID, args);
1002   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1003 
1004   return obj;
1005   JNI_END
1006 
1007 
1008 DT_RETURN_MARK_DECL(NewObjectV, jobject
1009                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1010 
1011 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1012   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1013 
1014   jobject obj = nullptr;
1015   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1016 
1017   oop clazzoop = JNIHandles::resolve_non_null(clazz);
1018   Klass* k = java_lang_Class::as_Klass(clazzoop);
1019   if (k == nullptr) {
1020     ResourceMark rm(THREAD);
1021     THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1022   }
1023 
1024   instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1025   obj = JNIHandles::make_local(THREAD, i);
1026   JavaValue jvalue(T_VOID);
1027   JNI_ArgumentPusherVaArg ap(methodID, args);
1028   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1029 
1030   return obj;
1031 JNI_END
1032 
1033 
1034 DT_RETURN_MARK_DECL(NewObject, jobject
1035                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1036 
1037 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1038   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1039 
1040   jobject obj = nullptr;
1041   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1042 
1043   oop clazzoop = JNIHandles::resolve_non_null(clazz);
1044   Klass* k = java_lang_Class::as_Klass(clazzoop);
1045   if (k == nullptr) {
1046     ResourceMark rm(THREAD);
1047     THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1048   }
1049 
1050   instanceOop i = InstanceKlass::allocate_instance(clazzoop, CHECK_NULL);
1051   obj = JNIHandles::make_local(THREAD, i);
1052   va_list args;
1053   va_start(args, methodID);
1054   JavaValue jvalue(T_VOID);
1055   JNI_ArgumentPusherVaArg ap(methodID, args);
1056   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1057   va_end(args);
1058 
1059   return obj;
1060 JNI_END
1061 
1062 
1063 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1064   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1065 
1066   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1067   jclass ret =
1068     (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1069 
1070   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1071   return ret;
1072 JNI_END
1073 
1074 JNI_ENTRY_NO_PRESERVE(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1075   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1076 
1077   jboolean ret = JNI_TRUE;
1078   if (obj != nullptr) {
1079     ret = JNI_FALSE;
1080     Klass* k = java_lang_Class::as_Klass(
1081       JNIHandles::resolve_non_null(clazz));
1082     if (k != nullptr) {
1083       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1084     }
1085   }
1086 
1087   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1088   return ret;
1089 JNI_END
1090 
1091 
1092 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1093                                const char *sig, bool is_static, TRAPS) {
1094   // %%%% This code should probably just call into a method in the LinkResolver
1095   //
1096   // The class should have been loaded (we have an instance of the class
1097   // passed in) so the method and signature should already be in the symbol
1098   // table.  If they're not there, the method doesn't exist.
1099   const char *name_to_probe = (name_str == nullptr)
1100                         ? vmSymbols::object_initializer_name()->as_C_string()
1101                         : name_str;
1102   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1103   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1104 
1105   if (name == nullptr || signature == nullptr) {
1106     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1107   }
1108 
1109   oop mirror = JNIHandles::resolve_non_null(clazz);
1110   Klass* klass = java_lang_Class::as_Klass(mirror);
1111 
1112   // Throw a NoSuchMethodError exception if we have an instance of a
1113   // primitive java.lang.Class
1114   if (java_lang_Class::is_primitive(mirror)) {
1115     ResourceMark rm(THREAD);
1116     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1117   }
1118 
1119   // Make sure class is linked and initialized before handing id's out to
1120   // Method*s.
1121   klass->initialize(CHECK_NULL);
1122 
1123   Method* m;
1124   if (name == vmSymbols::object_initializer_name() ||
1125       name == vmSymbols::class_initializer_name()) {
1126     // Never search superclasses for constructors
1127     if (klass->is_instance_klass()) {
1128       m = InstanceKlass::cast(klass)->find_method(name, signature);
1129     } else {
1130       m = nullptr;
1131     }
1132   } else {
1133     m = klass->lookup_method(name, signature);
1134     if (m == nullptr &&  klass->is_instance_klass()) {
1135       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1136     }
1137   }
1138   if (m == nullptr || (m->is_static() != is_static)) {
1139     ResourceMark rm(THREAD);
1140     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1141   }
1142   return m->jmethod_id();
1143 }
1144 
1145 
1146 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1147           const char *name, const char *sig))
1148   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1149   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1150   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1151   return ret;
1152 JNI_END
1153 
1154 
1155 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1156           const char *name, const char *sig))
1157   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1158   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1159   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1160   return ret;
1161 JNI_END
1162 
1163 
1164 
1165 //
1166 // Calling Methods
1167 //
1168 
1169 
1170 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1171                           , EntryProbe, ReturnProbe)    \
1172 \
1173   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1174                           , ReturnProbe);                          \
1175 \
1176 JNI_ENTRY(ResultType, \
1177           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1178 \
1179   EntryProbe; \
1180   ResultType ret = 0;\
1181   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1182                      (const ResultType&)ret);\
1183 \
1184   va_list args; \
1185   va_start(args, methodID); \
1186   JavaValue jvalue(Tag); \
1187   JNI_ArgumentPusherVaArg ap(methodID, args); \
1188   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1189   va_end(args); \
1190   ret = jvalue.get_##ResultType(); \
1191   return ret;\
1192 JNI_END
1193 
1194 // the runtime type of subword integral basic types is integer
1195 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1196                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1197                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1198 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1199                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1200                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1201 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1202                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1203                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1204 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1205                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1206                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1207 
1208 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1209                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1210                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1211 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1212                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1213                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1214 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1215                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1216                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1217 // Float and double probes don't return value because dtrace doesn't currently support it
1218 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1219                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1220                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1221 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1222                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1223                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1224 
1225 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1226                           , EntryProbe, ReturnProbe)    \
1227 \
1228   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1229                           , ReturnProbe);                          \
1230 \
1231 JNI_ENTRY(ResultType, \
1232           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1233 \
1234   EntryProbe;\
1235   ResultType ret = 0;\
1236   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1237                      (const ResultType&)ret);\
1238 \
1239   JavaValue jvalue(Tag); \
1240   JNI_ArgumentPusherVaArg ap(methodID, args); \
1241   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1242   ret = jvalue.get_##ResultType(); \
1243   return ret;\
1244 JNI_END
1245 
1246 // the runtime type of subword integral basic types is integer
1247 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1248                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1249                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1250 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1251                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1252                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1253 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1254                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1255                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1256 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1257                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1258                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1259 
1260 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1261                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1262                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1263 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1264                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1265                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1266 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1267                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1268                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1269 // Float and double probes don't return value because dtrace doesn't currently support it
1270 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1271                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1272                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1273 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1274                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1275                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1276 
1277 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1278                           , EntryProbe, ReturnProbe)    \
1279 \
1280   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1281                           , ReturnProbe);                          \
1282 \
1283 JNI_ENTRY(ResultType, \
1284           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1285   EntryProbe; \
1286   ResultType ret = 0;\
1287   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1288                      (const ResultType&)ret);\
1289 \
1290   JavaValue jvalue(Tag); \
1291   JNI_ArgumentPusherArray ap(methodID, args); \
1292   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1293   ret = jvalue.get_##ResultType(); \
1294   return ret;\
1295 JNI_END
1296 
1297 // the runtime type of subword integral basic types is integer
1298 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1299                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1300                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1301 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1302                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1303                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1304 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1305                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1306                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1307 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1308                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1309                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1310 
1311 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1312                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1313                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1314 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1315                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1316                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1317 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1318                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1319                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1320 // Float and double probes don't return value because dtrace doesn't currently support it
1321 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1322                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1323                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1324 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1325                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1326                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1327 
1328 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1329 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1330 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1331 
1332 
1333 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1334   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1335   DT_VOID_RETURN_MARK(CallVoidMethod);
1336 
1337   va_list args;
1338   va_start(args, methodID);
1339   JavaValue jvalue(T_VOID);
1340   JNI_ArgumentPusherVaArg ap(methodID, args);
1341   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1342   va_end(args);
1343 JNI_END
1344 
1345 
1346 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1347   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1348   DT_VOID_RETURN_MARK(CallVoidMethodV);
1349 
1350   JavaValue jvalue(T_VOID);
1351   JNI_ArgumentPusherVaArg ap(methodID, args);
1352   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1353 JNI_END
1354 
1355 
1356 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1357   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1358   DT_VOID_RETURN_MARK(CallVoidMethodA);
1359 
1360   JavaValue jvalue(T_VOID);
1361   JNI_ArgumentPusherArray ap(methodID, args);
1362   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1363 JNI_END
1364 
1365 
1366 
1367 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1368                                     , EntryProbe, ReturnProbe)      \
1369 \
1370   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1371                           , ReturnProbe);\
1372 \
1373 JNI_ENTRY(ResultType, \
1374           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1375 \
1376   EntryProbe;\
1377   ResultType ret;\
1378   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1379                      (const ResultType&)ret);\
1380 \
1381   va_list args; \
1382   va_start(args, methodID); \
1383   JavaValue jvalue(Tag); \
1384   JNI_ArgumentPusherVaArg ap(methodID, args); \
1385   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1386   va_end(args); \
1387   ret = jvalue.get_##ResultType(); \
1388   return ret;\
1389 JNI_END
1390 
1391 // the runtime type of subword integral basic types is integer
1392 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1393                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1394                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1395 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1396                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1397                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1398 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1399                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1400                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1401 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1402                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1403                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1404 
1405 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1406                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1407                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1408 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1409                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1410                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1411 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1412                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1413 // Float and double probes don't return value because dtrace doesn't currently support it
1414                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1415 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1416                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1417                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1418 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1419                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1420                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1421 
1422 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1423                                     , EntryProbe, ReturnProbe)      \
1424 \
1425   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1426                           , ReturnProbe);\
1427 \
1428 JNI_ENTRY(ResultType, \
1429           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1430 \
1431   EntryProbe;\
1432   ResultType ret;\
1433   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1434                      (const ResultType&)ret);\
1435 \
1436   JavaValue jvalue(Tag); \
1437   JNI_ArgumentPusherVaArg ap(methodID, args); \
1438   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1439   ret = jvalue.get_##ResultType(); \
1440   return ret;\
1441 JNI_END
1442 
1443 // the runtime type of subword integral basic types is integer
1444 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1445                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1446                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1447 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1448                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1449                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1450 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1451                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1452                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1453 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1454                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1455                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1456 
1457 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1458                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1459                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1461                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1462                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1464                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1465 // Float and double probes don't return value because dtrace doesn't currently support it
1466                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1467 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1468                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1469                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1470 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1471                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1472                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1473 
1474 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1475                                     , EntryProbe, ReturnProbe)      \
1476 \
1477   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1478                           , ReturnProbe);\
1479 \
1480 JNI_ENTRY(ResultType, \
1481           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1482 \
1483   EntryProbe;\
1484   ResultType ret;\
1485   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1486                      (const ResultType&)ret);\
1487 \
1488   JavaValue jvalue(Tag); \
1489   JNI_ArgumentPusherArray ap(methodID, args); \
1490   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1491   ret = jvalue.get_##ResultType(); \
1492   return ret;\
1493 JNI_END
1494 
1495 // the runtime type of subword integral basic types is integer
1496 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1497                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1498                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1499 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1500                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1501                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1502 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1503                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1504                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1505 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1506                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1507                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1508 
1509 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1510                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1511                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1513                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1514                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1516                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1517 // Float and double probes don't return value because dtrace doesn't currently support it
1518                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1519 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1520                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1521                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1522 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1523                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1524                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1525 
1526 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1527                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1528 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1529                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1530 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1531                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1532 
1533 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1534   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1535   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1536 
1537   va_list args;
1538   va_start(args, methodID);
1539   JavaValue jvalue(T_VOID);
1540   JNI_ArgumentPusherVaArg ap(methodID, args);
1541   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1542   va_end(args);
1543 JNI_END
1544 
1545 
1546 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1547   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1548                env, obj, cls, (uintptr_t) methodID);
1549   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1550 
1551   JavaValue jvalue(T_VOID);
1552   JNI_ArgumentPusherVaArg ap(methodID, args);
1553   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1554 JNI_END
1555 
1556 
1557 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1558   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1559                 env, obj, cls, (uintptr_t) methodID);
1560   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1561   JavaValue jvalue(T_VOID);
1562   JNI_ArgumentPusherArray ap(methodID, args);
1563   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1564 JNI_END
1565 
1566 
1567 
1568 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1569                                 , EntryProbe, ResultProbe) \
1570 \
1571   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1572                           , ResultProbe);                               \
1573 \
1574 JNI_ENTRY(ResultType, \
1575           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1576 \
1577   EntryProbe; \
1578   ResultType ret = 0;\
1579   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1580                      (const ResultType&)ret);\
1581 \
1582   va_list args; \
1583   va_start(args, methodID); \
1584   JavaValue jvalue(Tag); \
1585   JNI_ArgumentPusherVaArg ap(methodID, args); \
1586   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1587   va_end(args); \
1588   ret = jvalue.get_##ResultType(); \
1589   return ret;\
1590 JNI_END
1591 
1592 // the runtime type of subword integral basic types is integer
1593 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1594                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1595                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1596 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1597                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1598                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1599 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1600                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1601                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1602 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1603                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1604                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1605 
1606 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1607                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1608                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1609 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1610                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1611                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1612 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1613                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1614                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1615 // Float and double probes don't return value because dtrace doesn't currently support it
1616 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1617                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1618                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1619 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1620                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1621                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1622 
1623 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1624                                 , EntryProbe, ResultProbe) \
1625 \
1626   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1627                           , ResultProbe);                               \
1628 \
1629 JNI_ENTRY(ResultType, \
1630           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1631 \
1632   EntryProbe; \
1633   ResultType ret = 0;\
1634   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1635                      (const ResultType&)ret);\
1636 \
1637   JavaValue jvalue(Tag); \
1638   JNI_ArgumentPusherVaArg ap(methodID, args); \
1639   /* Make sure class is initialized before trying to invoke its method */ \
1640   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1641   k->initialize(CHECK_0); \
1642   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1643   va_end(args); \
1644   ret = jvalue.get_##ResultType(); \
1645   return ret;\
1646 JNI_END
1647 
1648 // the runtime type of subword integral basic types is integer
1649 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1650                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1651                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1652 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1653                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1654                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1655 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1656                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1657                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1658 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1659                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1660                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1661 
1662 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1663                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1664                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1665 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1666                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1667                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1668 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1669                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1670                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1671 // Float and double probes don't return value because dtrace doesn't currently support it
1672 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1673                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1674                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1675 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1676                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1677                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1678 
1679 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1680                                 , EntryProbe, ResultProbe) \
1681 \
1682   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1683                           , ResultProbe);                               \
1684 \
1685 JNI_ENTRY(ResultType, \
1686           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1687 \
1688   EntryProbe; \
1689   ResultType ret = 0;\
1690   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1691                      (const ResultType&)ret);\
1692 \
1693   JavaValue jvalue(Tag); \
1694   JNI_ArgumentPusherArray ap(methodID, args); \
1695   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK_0); \
1696   ret = jvalue.get_##ResultType(); \
1697   return ret;\
1698 JNI_END
1699 
1700 // the runtime type of subword integral basic types is integer
1701 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1702                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1703                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1704 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1705                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1706                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1707 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1708                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1709                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1710 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1711                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1712                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1713 
1714 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1715                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1716                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1717 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1718                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1719                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1720 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1721                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1722                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1723 // Float and double probes don't return value because dtrace doesn't currently support it
1724 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1725                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1726                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1727 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1728                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1729                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1730 
1731 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1732                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1733 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1734                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1735 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1736                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1737 
1738 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1739   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1740   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1741 
1742   va_list args;
1743   va_start(args, methodID);
1744   JavaValue jvalue(T_VOID);
1745   JNI_ArgumentPusherVaArg ap(methodID, args);
1746   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1747   va_end(args);
1748 JNI_END
1749 
1750 
1751 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1752   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1753   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1754 
1755   JavaValue jvalue(T_VOID);
1756   JNI_ArgumentPusherVaArg ap(methodID, args);
1757   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1758 JNI_END
1759 
1760 
1761 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1762   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1763   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1764 
1765   JavaValue jvalue(T_VOID);
1766   JNI_ArgumentPusherArray ap(methodID, args);
1767   jni_invoke_static(env, &jvalue, nullptr, JNI_STATIC, methodID, &ap, CHECK);
1768 JNI_END
1769 
1770 
1771 //
1772 // Accessing Fields
1773 //
1774 
1775 
1776 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
1777                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
1778 
1779 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
1780           const char *name, const char *sig))
1781   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
1782   jfieldID ret = 0;
1783   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
1784 
1785   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1786 
1787   // The class should have been loaded (we have an instance of the class
1788   // passed in) so the field and signature should already be in the symbol
1789   // table.  If they're not there, the field doesn't exist.
1790   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
1791   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
1792   if (fieldname == nullptr || signame == nullptr) {
1793     ResourceMark rm;
1794     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1795   }
1796 
1797   // Make sure class is initialized before handing id's out to fields
1798   k->initialize(CHECK_NULL);
1799 
1800   fieldDescriptor fd;
1801   if (!k->is_instance_klass() ||
1802       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
1803     ResourceMark rm;
1804     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
1805   }
1806 
1807   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
1808   // It may also have hash bits for k, if VerifyJNIFields is turned on.
1809   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset(), fd.is_flat());
1810   return ret;
1811 JNI_END
1812 
1813 
1814 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
1815   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
1816   oop o = JNIHandles::resolve_non_null(obj);
1817   Klass* k = o->klass();
1818   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1819   oop res = nullptr;
1820   // Keep JVMTI addition small and only check enabled flag here.
1821   // jni_GetField_probe() assumes that is okay to create handles.
1822   if (JvmtiExport::should_post_field_access()) {
1823     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
1824   }
1825   if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1826     res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
1827   } else {
1828     assert(k->is_instance_klass(), "Only instance can have flat fields");
1829     InstanceKlass* ik = InstanceKlass::cast(k);
1830     fieldDescriptor fd;
1831     ik->find_field_from_offset(offset, false, &fd);  // performance bottleneck
1832     InstanceKlass* holder = fd.field_holder();
1833     InlineKlass* field_vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1834     res = field_vklass->read_flat_field(o, ik->field_offset(fd.index()), CHECK_NULL);
1835   }
1836   jobject ret = JNIHandles::make_local(THREAD, res);
1837   HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
1838   return ret;
1839 JNI_END
1840 
1841 
1842 
1843 #define DEFINE_GETFIELD(Return,Fieldname,Result \
1844   , EntryProbe, ReturnProbe) \
1845 \
1846   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
1847   , ReturnProbe); \
1848 \
1849 JNI_ENTRY_NO_PRESERVE(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
1850 \
1851   EntryProbe; \
1852   Return ret = 0;\
1853   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
1854 \
1855   oop o = JNIHandles::resolve_non_null(obj); \
1856   Klass* k = o->klass(); \
1857   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
1858   /* Keep JVMTI addition small and only check enabled flag here.       */ \
1859   if (JvmtiExport::should_post_field_access()) { \
1860     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); \
1861   } \
1862   ret = o->Fieldname##_field(offset); \
1863   return ret; \
1864 JNI_END
1865 
1866 DEFINE_GETFIELD(jboolean, bool,   Boolean
1867                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1868                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
1869 DEFINE_GETFIELD(jbyte,    byte,   Byte
1870                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1871                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
1872 DEFINE_GETFIELD(jchar,    char,   Char
1873                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1874                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
1875 DEFINE_GETFIELD(jshort,   short,  Short
1876                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1877                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
1878 DEFINE_GETFIELD(jint,     int,    Int
1879                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1880                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
1881 DEFINE_GETFIELD(jlong,    long,   Long
1882                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1883                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
1884 // Float and double probes don't return value because dtrace doesn't currently support it
1885 DEFINE_GETFIELD(jfloat,   float,  Float
1886                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1887                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
1888 DEFINE_GETFIELD(jdouble,  double, Double
1889                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1890                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
1891 
1892 address jni_GetBooleanField_addr() {
1893   return (address)jni_GetBooleanField;
1894 }
1895 address jni_GetByteField_addr() {
1896   return (address)jni_GetByteField;
1897 }
1898 address jni_GetCharField_addr() {
1899   return (address)jni_GetCharField;
1900 }
1901 address jni_GetShortField_addr() {
1902   return (address)jni_GetShortField;
1903 }
1904 address jni_GetIntField_addr() {
1905   return (address)jni_GetIntField;
1906 }
1907 address jni_GetLongField_addr() {
1908   return (address)jni_GetLongField;
1909 }
1910 address jni_GetFloatField_addr() {
1911   return (address)jni_GetFloatField;
1912 }
1913 address jni_GetDoubleField_addr() {
1914   return (address)jni_GetDoubleField;
1915 }
1916 
1917 JNI_ENTRY_NO_PRESERVE(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
1918   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
1919   oop o = JNIHandles::resolve_non_null(obj);
1920   Klass* k = o->klass();
1921   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
1922   // Keep JVMTI addition small and only check enabled flag here.
1923   if (JvmtiExport::should_post_field_modification()) {
1924     jvalue field_value;
1925     field_value.l = value;
1926     o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
1927   }
1928   if (!jfieldIDWorkaround::is_flat_jfieldID(fieldID)) {
1929     HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
1930   } else {
1931     assert(k->is_instance_klass(), "Only instances can have flat fields");
1932     InstanceKlass* ik = InstanceKlass::cast(k);
1933     fieldDescriptor fd;
1934     ik->find_field_from_offset(offset, false, &fd);
1935     InstanceKlass* holder = fd.field_holder();
1936     InlineKlass* vklass = InlineKlass::cast(holder->get_inline_type_field_klass(fd.index()));
1937     oop v = JNIHandles::resolve_non_null(value);
1938     vklass->write_flat_field(o, offset, v, CHECK);
1939   }
1940   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
1941 JNI_END
1942 
1943 // TODO: make this a template
1944 
1945 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
1946                         , EntryProbe, ReturnProbe) \
1947 \
1948 JNI_ENTRY_NO_PRESERVE(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
1949 \
1950   EntryProbe; \
1951 \
1952   oop o = JNIHandles::resolve_non_null(obj); \
1953   Klass* k = o->klass(); \
1954   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
1955   /* Keep JVMTI addition small and only check enabled flag here.       */ \
1956   if (JvmtiExport::should_post_field_modification()) { \
1957     jvalue field_value; \
1958     field_value.unionType = value; \
1959     o = JvmtiExport::jni_SetField_probe(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
1960   } \
1961   o->Fieldname##_field_put(offset, value); \
1962   ReturnProbe; \
1963 JNI_END
1964 
1965 DEFINE_SETFIELD(jboolean, bool,   Boolean, JVM_SIGNATURE_BOOLEAN, z
1966                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1967                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
1968 DEFINE_SETFIELD(jbyte,    byte,   Byte,    JVM_SIGNATURE_BYTE, b
1969                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1970                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
1971 DEFINE_SETFIELD(jchar,    char,   Char,    JVM_SIGNATURE_CHAR, c
1972                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1973                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
1974 DEFINE_SETFIELD(jshort,   short,  Short,   JVM_SIGNATURE_SHORT, s
1975                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1976                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
1977 DEFINE_SETFIELD(jint,     int,    Int,     JVM_SIGNATURE_INT, i
1978                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1979                 HOTSPOT_JNI_SETINTFIELD_RETURN())
1980 DEFINE_SETFIELD(jlong,    long,   Long,    JVM_SIGNATURE_LONG, j
1981                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
1982                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
1983 // Float and double probes don't return value because dtrace doesn't currently support it
1984 DEFINE_SETFIELD(jfloat,   float,  Float,   JVM_SIGNATURE_FLOAT, f
1985                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1986                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
1987 DEFINE_SETFIELD(jdouble,  double, Double,  JVM_SIGNATURE_DOUBLE, d
1988                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
1989                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
1990 
1991 DT_RETURN_MARK_DECL(ToReflectedField, jobject
1992                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
1993 
1994 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
1995   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
1996   jobject ret = nullptr;
1997   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
1998 
1999   fieldDescriptor fd;
2000   bool found = false;
2001   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2002 
2003   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2004 
2005   if (isStatic) {
2006     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2007     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2008     assert(id->is_static_field_id(), "invalid static field id");
2009     found = id->find_local_field(&fd);
2010   } else {
2011     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2012     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2013     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2014   }
2015   assert(found, "bad fieldID passed into jni_ToReflectedField");
2016   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2017   ret = JNIHandles::make_local(THREAD, reflected);
2018   return ret;
2019 JNI_END
2020 
2021 
2022 //
2023 // Accessing Static Fields
2024 //
2025 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2026                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2027 
2028 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2029           const char *name, const char *sig))
2030   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2031   jfieldID ret = nullptr;
2032   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2033 
2034   // The class should have been loaded (we have an instance of the class
2035   // passed in) so the field and signature should already be in the symbol
2036   // table.  If they're not there, the field doesn't exist.
2037   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2038   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2039   if (fieldname == nullptr || signame == nullptr) {
2040     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2041   }
2042   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2043   // Make sure class is initialized before handing id's out to static fields
2044   k->initialize(CHECK_NULL);
2045 
2046   fieldDescriptor fd;
2047   if (!k->is_instance_klass() ||
2048       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2049     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2050   }
2051 
2052   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2053   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2054   debug_only(id->set_is_static_field_id();)
2055 
2056   debug_only(id->verify(fd.field_holder()));
2057 
2058   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2059   return ret;
2060 JNI_END
2061 
2062 
2063 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2064   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2065 #if INCLUDE_JNI_CHECK
2066   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2067 #endif // INCLUDE_JNI_CHECK
2068   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2069   assert(id->is_static_field_id(), "invalid static field id");
2070   // Keep JVMTI addition small and only check enabled flag here.
2071   // jni_GetField_probe() assumes that is okay to create handles.
2072   if (JvmtiExport::should_post_field_access()) {
2073     JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true);
2074   }
2075   jobject ret = JNIHandles::make_local(THREAD, id->holder()->java_mirror()->obj_field(id->offset()));
2076   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2077   return ret;
2078 JNI_END
2079 
2080 
2081 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2082                               , EntryProbe, ReturnProbe) \
2083 \
2084   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2085                           , ReturnProbe);                                          \
2086 \
2087 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2088   EntryProbe; \
2089   Return ret = 0;\
2090   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2091                      (const Return&)ret);\
2092   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2093   assert(id->is_static_field_id(), "invalid static field id"); \
2094   /* Keep JVMTI addition small and only check enabled flag here. */ \
2095   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2096   if (JvmtiExport::should_post_field_access()) { \
2097     JvmtiExport::jni_GetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true); \
2098   } \
2099   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2100   return ret;\
2101 JNI_END
2102 
2103 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2104                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2105 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2106                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2107 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2108                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2109 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2110                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2111 DEFINE_GETSTATICFIELD(jint,     int,    Int
2112                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2113 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2114                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2115 // Float and double probes don't return value because dtrace doesn't currently support it
2116 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2117                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2118 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2119                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2120 
2121 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2122  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2123   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2124   assert(id->is_static_field_id(), "invalid static field id");
2125   // Keep JVMTI addition small and only check enabled flag here.
2126   // jni_SetField_probe() assumes that is okay to create handles.
2127   if (JvmtiExport::should_post_field_modification()) {
2128     jvalue field_value;
2129     field_value.l = value;
2130     JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, JVM_SIGNATURE_CLASS, (jvalue *)&field_value);
2131   }
2132   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2133   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2134 JNI_END
2135 
2136 
2137 
2138 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2139                               , EntryProbe, ReturnProbe) \
2140 \
2141 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2142   EntryProbe; \
2143 \
2144   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2145   assert(id->is_static_field_id(), "invalid static field id"); \
2146   /* Keep JVMTI addition small and only check enabled flag here. */ \
2147   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2148   if (JvmtiExport::should_post_field_modification()) { \
2149     jvalue field_value; \
2150     field_value.unionType = value; \
2151     JvmtiExport::jni_SetField_probe(thread, nullptr, nullptr, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2152   } \
2153   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2154   ReturnProbe;\
2155 JNI_END
2156 
2157 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, JVM_SIGNATURE_BOOLEAN, z
2158                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2159                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2160 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    JVM_SIGNATURE_BYTE, b
2161                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2162                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2163 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    JVM_SIGNATURE_CHAR, c
2164                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2165                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2166 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   JVM_SIGNATURE_SHORT, s
2167                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2168                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2169 DEFINE_SETSTATICFIELD(jint,     int,    Int,     JVM_SIGNATURE_INT, i
2170                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2171                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2172 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    JVM_SIGNATURE_LONG, j
2173                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2174                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2175 // Float and double probes don't return value because dtrace doesn't currently support it
2176 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   JVM_SIGNATURE_FLOAT, f
2177                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2178                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2179 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  JVM_SIGNATURE_DOUBLE, d
2180                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2181                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2182 
2183 //
2184 // String Operations
2185 //
2186 
2187 // Unicode Interface
2188 
2189 DT_RETURN_MARK_DECL(NewString, jstring
2190                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2191 
2192 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2193  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2194   jstring ret = nullptr;
2195   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2196   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2197   ret = (jstring) JNIHandles::make_local(THREAD, string);
2198   return ret;
2199 JNI_END
2200 
2201 
2202 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2203   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2204   jsize ret = 0;
2205   oop s = JNIHandles::resolve_non_null(string);
2206   ret = java_lang_String::length(s);
2207  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2208   return ret;
2209 JNI_END
2210 
2211 
2212 JNI_ENTRY_NO_PRESERVE(const jchar*, jni_GetStringChars(
2213   JNIEnv *env, jstring string, jboolean *isCopy))
2214  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2215   jchar* buf = nullptr;
2216   oop s = JNIHandles::resolve_non_null(string);
2217   typeArrayOop s_value = java_lang_String::value(s);
2218   if (s_value != nullptr) {
2219     int s_len = java_lang_String::length(s, s_value);
2220     bool is_latin1 = java_lang_String::is_latin1(s);
2221     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2222     /* JNI Specification states return null on OOM */
2223     if (buf != nullptr) {
2224       if (s_len > 0) {
2225         if (!is_latin1) {
2226           ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2227                                              buf, s_len);
2228         } else {
2229           for (int i = 0; i < s_len; i++) {
2230             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2231           }
2232         }
2233       }
2234       buf[s_len] = 0;
2235       //%note jni_5
2236       if (isCopy != nullptr) {
2237         *isCopy = JNI_TRUE;
2238       }
2239     }
2240   }
2241   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2242   return buf;
2243 JNI_END
2244 
2245 
2246 JNI_ENTRY_NO_PRESERVE(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2247   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2248   //%note jni_6
2249   if (chars != nullptr) {
2250     // Since String objects are supposed to be immutable, don't copy any
2251     // new data back.  A bad user will have to go after the char array.
2252     FreeHeap((void*) chars);
2253   }
2254   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2255 JNI_END
2256 
2257 
2258 // UTF Interface
2259 
2260 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2261                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2262 
2263 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2264   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2265   jstring ret;
2266   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2267 
2268   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2269   ret = (jstring) JNIHandles::make_local(THREAD, result);
2270   return ret;
2271 JNI_END
2272 
2273 
2274 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2275  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2276   oop java_string = JNIHandles::resolve_non_null(string);
2277   jsize ret = java_lang_String::utf8_length(java_string);
2278   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2279   return ret;
2280 JNI_END
2281 
2282 
2283 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2284  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2285   char* result = nullptr;
2286   oop java_string = JNIHandles::resolve_non_null(string);
2287   typeArrayOop s_value = java_lang_String::value(java_string);
2288   if (s_value != nullptr) {
2289     size_t length = java_lang_String::utf8_length(java_string, s_value);
2290     /* JNI Specification states return null on OOM */
2291     result = AllocateHeap(length + 1, mtInternal, AllocFailStrategy::RETURN_NULL);
2292     if (result != nullptr) {
2293       java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2294       if (isCopy != nullptr) {
2295         *isCopy = JNI_TRUE;
2296       }
2297     }
2298   }
2299  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2300   return result;
2301 JNI_END
2302 
2303 
2304 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2305  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2306   if (chars != nullptr) {
2307     FreeHeap((char*) chars);
2308   }
2309 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2310 JNI_END
2311 
2312 
2313 JNI_ENTRY_NO_PRESERVE(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2314  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2315   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2316   assert(a->is_array(), "must be array");
2317   jsize ret = a->length();
2318  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2319   return ret;
2320 JNI_END
2321 
2322 
2323 //
2324 // Object Array Operations
2325 //
2326 
2327 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2328                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2329 
2330 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2331  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2332   jobjectArray ret = nullptr;
2333   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2334   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2335   Klass* ak = ek->array_klass(CHECK_NULL);
2336   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2337   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2338   oop initial_value = JNIHandles::resolve(initialElement);
2339   if (initial_value != nullptr) {  // array already initialized with null
2340     for (int index = 0; index < length; index++) {
2341       result->obj_at_put(index, initial_value);
2342     }
2343   }
2344   ret = (jobjectArray) JNIHandles::make_local(THREAD, result);
2345   return ret;
2346 JNI_END
2347 
2348 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2349                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2350 
2351 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2352  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2353   jobject ret = nullptr;
2354   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2355   oop res = nullptr;
2356   arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2357   if (arr->is_within_bounds(index)) {
2358     if (arr->is_flatArray()) {
2359       flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2360       flatArrayHandle vah(thread, a);
2361       res = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK_NULL);
2362       assert(res != nullptr, "Must be set in one of two paths above");
2363     } else {
2364       assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2365       objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2366       res = a->obj_at(index);
2367     }
2368   } else {
2369     ResourceMark rm(THREAD);
2370     stringStream ss;
2371     ss.print("Index %d out of bounds for length %d", index,arr->length());
2372     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2373   }
2374   ret = JNIHandles::make_local(THREAD, res);
2375   return ret;
2376 JNI_END
2377 
2378 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2379                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2380 
2381 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2382  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2383   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2384 
2385    bool oob = false;
2386    int length = -1;
2387    oop res = nullptr;
2388    arrayOop arr((arrayOop)JNIHandles::resolve_non_null(array));
2389    if (arr->is_within_bounds(index)) {
2390      if (arr->is_flatArray()) {
2391        flatArrayOop a = flatArrayOop(JNIHandles::resolve_non_null(array));
2392        oop v = JNIHandles::resolve(value);
2393        FlatArrayKlass* vaklass = FlatArrayKlass::cast(a->klass());
2394        InlineKlass* element_vklass = vaklass->element_klass();
2395        if (v != nullptr && v->is_a(element_vklass)) {
2396          a->value_copy_to_index(v, index);
2397        } else {
2398          ResourceMark rm(THREAD);
2399          stringStream ss;
2400          Klass *kl = FlatArrayKlass::cast(a->klass());
2401          ss.print("type mismatch: can not store %s to %s[%d]",
2402              v->klass()->external_name(),
2403              kl->external_name(),
2404              index);
2405          for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2406            ss.print("[]");
2407          }
2408          THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2409        }
2410      } else {
2411        assert(arr->is_objArray(), "If not a valueArray. must be an objArray");
2412        objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2413        oop v = JNIHandles::resolve(value);
2414        if (v == nullptr || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2415          a->obj_at_put(index, v);
2416        } else {
2417          ResourceMark rm(THREAD);
2418          stringStream ss;
2419          Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2420          ss.print("type mismatch: can not store %s to %s[%d]",
2421              v->klass()->external_name(),
2422              bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2423                  index);
2424          for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2425            ss.print("[]");
2426          }
2427          THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2428        }
2429      }
2430    } else {
2431      ResourceMark rm(THREAD);
2432      stringStream ss;
2433      ss.print("Index %d out of bounds for length %d", index, arr->length());
2434      THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2435    }
2436 JNI_END
2437 
2438 
2439 
2440 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2441                               ,EntryProbe,ReturnProbe)  \
2442 \
2443   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2444                       , ReturnProbe); \
2445 \
2446 JNI_ENTRY(Return, \
2447           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2448   EntryProbe; \
2449   Return ret = nullptr;\
2450   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2451 \
2452   oop obj= oopFactory::Allocator(len, CHECK_NULL); \
2453   ret = (Return) JNIHandles::make_local(THREAD, obj); \
2454   return ret;\
2455 JNI_END
2456 
2457 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2458                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2459                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2460 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2461                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2462                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2463 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2464                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2465                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2466 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2467                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2468                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2469 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2470                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2471                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2472 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2473                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2474                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2475 DEFINE_NEWSCALARARRAY(jfloatArray,   new_floatArray,  Float,
2476                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2477                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2478 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2479                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2480                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2481 
2482 // Return an address which will fault if the caller writes to it.
2483 
2484 static char* get_bad_address() {
2485   static char* bad_address = nullptr;
2486   if (bad_address == nullptr) {
2487     size_t size = os::vm_allocation_granularity();
2488     bad_address = os::reserve_memory(size);
2489     if (bad_address != nullptr) {
2490       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2491                          /*is_committed*/false);
2492       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2493     }
2494   }
2495   return bad_address;
2496 }
2497 
2498 
2499 
2500 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2501                                       , EntryProbe, ReturnProbe) \
2502 \
2503 JNI_ENTRY_NO_PRESERVE(ElementType*, \
2504           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2505   EntryProbe; \
2506   /* allocate an chunk of memory in c land */ \
2507   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2508   ElementType* result; \
2509   int len = a->length(); \
2510   if (len == 0) { \
2511     if (isCopy != nullptr) { \
2512       *isCopy = JNI_FALSE; \
2513     } \
2514     /* Empty array: legal but useless, can't return null. \
2515      * Return a pointer to something useless. \
2516      * Avoid asserts in typeArrayOop. */ \
2517     result = (ElementType*)get_bad_address(); \
2518   } else { \
2519     /* JNI Specification states return null on OOM */                    \
2520     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2521     if (result != nullptr) {                                             \
2522       /* copy the array to the c chunk */                                \
2523       ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2524                                          result, len);                   \
2525       if (isCopy) {                                                      \
2526         *isCopy = JNI_TRUE;                                              \
2527       }                                                                  \
2528     }                                                                    \
2529   } \
2530   ReturnProbe; \
2531   return result; \
2532 JNI_END
2533 
2534 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2535                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2536                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2537 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2538                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2539                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2540 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2541                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2542                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2543 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2544                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2545                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2546 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2547                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2548                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2549 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2550                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2551                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2552 // Float and double probes don't return value because dtrace doesn't currently support it
2553 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2554                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2555                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2556 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2557                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2558                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2559 
2560 
2561 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2562                                           , EntryProbe, ReturnProbe);\
2563 \
2564 JNI_ENTRY_NO_PRESERVE(void, \
2565           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2566                                              ElementType *buf, jint mode)) \
2567   EntryProbe; \
2568   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2569   int len = a->length(); \
2570   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2571     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2572       ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2573     } \
2574     if ((mode == 0) || (mode == JNI_ABORT)) { \
2575       FreeHeap(buf); \
2576     } \
2577   } \
2578   ReturnProbe; \
2579 JNI_END
2580 
2581 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2582                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2583                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2584 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2585                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2586                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2587 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2588                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2589                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2590 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2591                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2592                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2593 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2594                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2595                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2596 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2597                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2598                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2599 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2600                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2601                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2602 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2603                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2604                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2605 
2606 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2607   ResourceMark rm(THREAD);
2608   if (copy_len < 0) {
2609     stringStream ss;
2610     ss.print("Length %d is negative", copy_len);
2611     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2612   } else if (start < 0 || (start > array_len - copy_len)) {
2613     stringStream ss;
2614     ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2615              start, (int64_t)start+(int64_t)copy_len, array_len);
2616     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2617   }
2618 }
2619 
2620 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2621                                     , EntryProbe, ReturnProbe); \
2622   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2623                            , ReturnProbe); \
2624 \
2625 JNI_ENTRY(void, \
2626 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2627              jsize len, ElementType *buf)) \
2628   EntryProbe; \
2629   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2630   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2631   check_bounds(start, len, src->length(), CHECK); \
2632   if (len > 0) {    \
2633     ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2634   } \
2635 JNI_END
2636 
2637 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2638                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2639                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2640 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2641                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2642                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2643 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2644                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2645                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2646 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2647                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2648                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2649 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2650                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2651                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2652 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2653                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2654                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2655 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2656                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2657                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2658 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2659                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2660                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2661 
2662 
2663 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2664                                     , EntryProbe, ReturnProbe); \
2665   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2666                            ,ReturnProbe);           \
2667 \
2668 JNI_ENTRY(void, \
2669 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2670              jsize len, const ElementType *buf)) \
2671   EntryProbe; \
2672   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2673   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2674   check_bounds(start, len, dst->length(), CHECK); \
2675   if (len > 0) { \
2676     ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2677   } \
2678 JNI_END
2679 
2680 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2681                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2682                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2683 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2684                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2685                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2686 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2687                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2688                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2689 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2690                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2691                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2692 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2693                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2694                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2695 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2696                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2697                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2698 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2699                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2700                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2701 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2702                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2703                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2704 
2705 
2706 DT_RETURN_MARK_DECL(RegisterNatives, jint
2707                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2708 
2709 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2710                                     const JNINativeMethod *methods,
2711                                     jint nMethods))
2712   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2713   jint ret = 0;
2714   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2715 
2716   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2717 
2718   // There are no restrictions on native code registering native methods,
2719   // which allows agents to redefine the bindings to native methods, however
2720   // we issue a warning if any code running outside of the boot/platform
2721   // loader is rebinding any native methods in classes loaded by the
2722   // boot/platform loader that are in named modules. That will catch changes
2723   // to platform classes while excluding classes added to the bootclasspath.
2724   bool do_warning = false;
2725 
2726   // Only instanceKlasses can have native methods
2727   if (k->is_instance_klass()) {
2728     oop cl = k->class_loader();
2729     InstanceKlass* ik = InstanceKlass::cast(k);
2730     // Check for a platform class
2731     if ((cl ==  nullptr || SystemDictionary::is_platform_class_loader(cl)) &&
2732         ik->module()->is_named()) {
2733       Klass* caller = thread->security_get_caller_class(1);
2734       // If no caller class, or caller class has a different loader, then
2735       // issue a warning below.
2736       do_warning = (caller == nullptr) || caller->class_loader() != cl;
2737     }
2738   }
2739 
2740 
2741   for (int index = 0; index < nMethods; index++) {
2742     const char* meth_name = methods[index].name;
2743     const char* meth_sig = methods[index].signature;
2744     int meth_name_len = (int)strlen(meth_name);
2745 
2746     // The class should have been loaded (we have an instance of the class
2747     // passed in) so the method and signature should already be in the symbol
2748     // table.  If they're not there, the method doesn't exist.
2749     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
2750     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
2751 
2752     if (name == nullptr || signature == nullptr) {
2753       ResourceMark rm(THREAD);
2754       stringStream st;
2755       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
2756       // Must return negative value on failure
2757       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
2758     }
2759 
2760     if (do_warning) {
2761       ResourceMark rm(THREAD);
2762       log_warning(jni, resolve)("Re-registering of platform native method: %s.%s%s "
2763               "from code in a different classloader", k->external_name(), meth_name, meth_sig);
2764     }
2765 
2766     bool res = Method::register_native(k, name, signature,
2767                                        (address) methods[index].fnPtr, THREAD);
2768     if (!res) {
2769       ret = -1;
2770       break;
2771     }
2772   }
2773   return ret;
2774 JNI_END
2775 
2776 
2777 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
2778  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
2779   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2780   //%note jni_2
2781   if (k->is_instance_klass()) {
2782     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
2783       Method* m = InstanceKlass::cast(k)->methods()->at(index);
2784       if (m->is_native()) {
2785         m->clear_native_function();
2786         m->set_signature_handler(nullptr);
2787       }
2788     }
2789   }
2790  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
2791   return 0;
2792 JNI_END
2793 
2794 //
2795 // Monitor functions
2796 //
2797 
2798 DT_RETURN_MARK_DECL(MonitorEnter, jint
2799                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
2800 
2801 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
2802  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
2803   jint ret = JNI_ERR;
2804   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
2805 
2806   // If the object is null, we can't do anything with it
2807   if (jobj == nullptr) {
2808     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2809   }
2810 
2811   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
2812   ObjectSynchronizer::jni_enter(obj, thread);
2813   return JNI_OK;
2814 JNI_END
2815 
2816 DT_RETURN_MARK_DECL(MonitorExit, jint
2817                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
2818 
2819 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
2820  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
2821   jint ret = JNI_ERR;
2822   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
2823 
2824   // Don't do anything with a null object
2825   if (jobj == nullptr) {
2826     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
2827   }
2828 
2829   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
2830   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
2831   return JNI_OK;
2832 JNI_END
2833 
2834 //
2835 // Extensions
2836 //
2837 
2838 DT_VOID_RETURN_MARK_DECL(GetStringRegion
2839                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
2840 
2841 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
2842  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
2843   DT_VOID_RETURN_MARK(GetStringRegion);
2844   oop s = JNIHandles::resolve_non_null(string);
2845   typeArrayOop s_value = java_lang_String::value(s);
2846   int s_len = java_lang_String::length(s, s_value);
2847   if (start < 0 || len < 0 || start > s_len - len) {
2848     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2849   } else {
2850     if (len > 0) {
2851       bool is_latin1 = java_lang_String::is_latin1(s);
2852       if (!is_latin1) {
2853         ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
2854                                            buf, len);
2855       } else {
2856         for (int i = 0; i < len; i++) {
2857           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
2858         }
2859       }
2860     }
2861   }
2862 JNI_END
2863 
2864 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
2865                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
2866 
2867 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
2868  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
2869   DT_VOID_RETURN_MARK(GetStringUTFRegion);
2870   oop s = JNIHandles::resolve_non_null(string);
2871   typeArrayOop s_value = java_lang_String::value(s);
2872   int s_len = java_lang_String::length(s, s_value);
2873   if (start < 0 || len < 0 || start > s_len - len) {
2874     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
2875   } else {
2876     //%note jni_7
2877     if (len > 0) {
2878       // Assume the buffer is large enough as the JNI spec. does not require user error checking
2879       java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
2880       // as_utf8_string null-terminates the result string
2881     } else {
2882       // JDK null-terminates the buffer even in len is zero
2883       if (buf != nullptr) {
2884         buf[0] = 0;
2885       }
2886     }
2887   }
2888 JNI_END
2889 
2890 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
2891  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
2892   Handle a(thread, JNIHandles::resolve_non_null(array));
2893   assert(a->is_typeArray(), "just checking");
2894 
2895   // Pin object
2896   Universe::heap()->pin_object(thread, a());
2897 
2898   BasicType type = TypeArrayKlass::cast(a->klass())->element_type();
2899   void* ret = arrayOop(a())->base(type);
2900   if (isCopy != nullptr) {
2901     *isCopy = JNI_FALSE;
2902   }
2903  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
2904   return ret;
2905 JNI_END
2906 
2907 
2908 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
2909   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
2910   // Unpin object
2911   Universe::heap()->unpin_object(thread, JNIHandles::resolve_non_null(array));
2912 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
2913 JNI_END
2914 
2915 
2916 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
2917   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
2918   oop s = JNIHandles::resolve_non_null(string);
2919   jchar* ret;
2920   if (!java_lang_String::is_latin1(s)) {
2921     typeArrayHandle s_value(thread, java_lang_String::value(s));
2922 
2923     // Pin value array
2924     Universe::heap()->pin_object(thread, s_value());
2925 
2926     ret = (jchar*) s_value->base(T_CHAR);
2927     if (isCopy != nullptr) *isCopy = JNI_FALSE;
2928   } else {
2929     // Inflate latin1 encoded string to UTF16
2930     typeArrayOop s_value = java_lang_String::value(s);
2931     int s_len = java_lang_String::length(s, s_value);
2932     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2933     /* JNI Specification states return null on OOM */
2934     if (ret != nullptr) {
2935       for (int i = 0; i < s_len; i++) {
2936         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2937       }
2938       ret[s_len] = 0;
2939     }
2940     if (isCopy != nullptr) *isCopy = JNI_TRUE;
2941   }
2942  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
2943   return ret;
2944 JNI_END
2945 
2946 
2947 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
2948   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
2949   oop s = JNIHandles::resolve_non_null(str);
2950   bool is_latin1 = java_lang_String::is_latin1(s);
2951 
2952   if (is_latin1) {
2953     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
2954     // This assumes that ReleaseStringCritical bookends GetStringCritical.
2955     FREE_C_HEAP_ARRAY(jchar, chars);
2956   } else {
2957     // StringDedup can have replaced the value array, so don't fetch the array from 's'.
2958     // Instead, we calculate the address based on the jchar array exposed with GetStringCritical.
2959     oop value = cast_to_oop((address)chars - arrayOopDesc::base_offset_in_bytes(T_CHAR));
2960 
2961     // Unpin value array
2962     Universe::heap()->unpin_object(thread, value);
2963   }
2964 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
2965 JNI_END
2966 
2967 
2968 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
2969   HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
2970   Handle ref_handle(thread, JNIHandles::resolve(ref));
2971   jweak ret = JNIHandles::make_weak_global(ref_handle, AllocFailStrategy::RETURN_NULL);
2972   if (ret == nullptr && ref_handle.not_null()) {
2973     THROW_OOP_(Universe::out_of_memory_error_c_heap(), nullptr);
2974   }
2975   HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
2976   return ret;
2977 JNI_END
2978 
2979 // Must be JNI_ENTRY (with HandleMark)
2980 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
2981   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
2982   JNIHandles::destroy_weak_global(ref);
2983   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
2984 JNI_END
2985 
2986 
2987 JNI_ENTRY_NO_PRESERVE(jboolean, jni_ExceptionCheck(JNIEnv *env))
2988  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
2989   jni_check_async_exceptions(thread);
2990   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
2991  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
2992   return ret;
2993 JNI_END
2994 
2995 
2996 // Initialization state for three routines below relating to
2997 // java.nio.DirectBuffers
2998 static          int directBufferSupportInitializeStarted = 0;
2999 static volatile int directBufferSupportInitializeEnded   = 0;
3000 static volatile int directBufferSupportInitializeFailed  = 0;
3001 static jclass    bufferClass                 = nullptr;
3002 static jclass    directBufferClass           = nullptr;
3003 static jclass    directByteBufferClass       = nullptr;
3004 static jmethodID directByteBufferConstructor = nullptr;
3005 static jfieldID  directBufferAddressField    = nullptr;
3006 static jfieldID  bufferCapacityField         = nullptr;
3007 
3008 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3009   Handle loader;            // null (bootstrap) loader
3010   Handle protection_domain; // null protection domain
3011 
3012   TempNewSymbol sym = SymbolTable::new_symbol(name);
3013   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3014 
3015   if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
3016     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3017   }
3018   return result;
3019 }
3020 
3021 // These lookups are done with the null (bootstrap) ClassLoader to
3022 // circumvent any security checks that would be done by jni_FindClass.
3023 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3024 {
3025   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == nullptr) { return false; }
3026   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == nullptr) { return false; }
3027   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == nullptr) { return false; }
3028   return true;
3029 }
3030 JNI_END
3031 
3032 
3033 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3034   if (directBufferSupportInitializeFailed) {
3035     return false;
3036   }
3037 
3038   if (Atomic::cmpxchg(&directBufferSupportInitializeStarted, 0, 1) == 0) {
3039     if (!lookupDirectBufferClasses(env)) {
3040       directBufferSupportInitializeFailed = 1;
3041       return false;
3042     }
3043 
3044     // Make global references for these
3045     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3046     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3047     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3048 
3049     // Global refs will be null if out-of-memory (no exception is pending)
3050     if (bufferClass == nullptr || directBufferClass == nullptr || directByteBufferClass == nullptr) {
3051       directBufferSupportInitializeFailed = 1;
3052       return false;
3053     }
3054 
3055     // Get needed field and method IDs
3056     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JJ)V");
3057     if (env->ExceptionCheck()) {
3058       env->ExceptionClear();
3059       directBufferSupportInitializeFailed = 1;
3060       return false;
3061     }
3062     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3063     if (env->ExceptionCheck()) {
3064       env->ExceptionClear();
3065       directBufferSupportInitializeFailed = 1;
3066       return false;
3067     }
3068     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3069     if (env->ExceptionCheck()) {
3070       env->ExceptionClear();
3071       directBufferSupportInitializeFailed = 1;
3072       return false;
3073     }
3074 
3075     if ((directByteBufferConstructor == nullptr) ||
3076         (directBufferAddressField    == nullptr) ||
3077         (bufferCapacityField         == nullptr)) {
3078       directBufferSupportInitializeFailed = 1;
3079       return false;
3080     }
3081 
3082     directBufferSupportInitializeEnded = 1;
3083   } else {
3084     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3085       os::naked_yield();
3086     }
3087   }
3088 
3089   return !directBufferSupportInitializeFailed;
3090 }
3091 
3092 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3093 {
3094   // thread_from_jni_environment() will block if VM is gone.
3095   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3096 
3097  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3098 
3099   if (!directBufferSupportInitializeEnded) {
3100     if (!initializeDirectBufferSupport(env, thread)) {
3101       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(nullptr);
3102       return nullptr;
3103     }
3104   }
3105 
3106   // Being paranoid about accidental sign extension on address
3107   jlong addr = (jlong) ((uintptr_t) address);
3108   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, capacity);
3109   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3110   return ret;
3111 }
3112 
3113 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3114                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3115 
3116 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3117 {
3118   // thread_from_jni_environment() will block if VM is gone.
3119   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3120 
3121   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3122   void* ret = nullptr;
3123   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3124 
3125   if (!directBufferSupportInitializeEnded) {
3126     if (!initializeDirectBufferSupport(env, thread)) {
3127       return 0;
3128     }
3129   }
3130 
3131   if ((buf != nullptr) && (!env->IsInstanceOf(buf, directBufferClass))) {
3132     return 0;
3133   }
3134 
3135   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3136   return ret;
3137 }
3138 
3139 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3140                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3141 
3142 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3143 {
3144   // thread_from_jni_environment() will block if VM is gone.
3145   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3146 
3147   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3148   jlong ret = -1;
3149   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3150 
3151   if (!directBufferSupportInitializeEnded) {
3152     if (!initializeDirectBufferSupport(env, thread)) {
3153       ret = 0;
3154       return ret;
3155     }
3156   }
3157 
3158   if (buf == nullptr) {
3159     return -1;
3160   }
3161 
3162   if (!env->IsInstanceOf(buf, directBufferClass)) {
3163     return -1;
3164   }
3165 
3166   // NOTE that capacity is currently an int in the implementation
3167   ret = env->GetIntField(buf, bufferCapacityField);
3168   return ret;
3169 }
3170 
3171 
3172 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3173   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3174   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3175   return CurrentVersion;
3176 JNI_END
3177 
3178 extern struct JavaVM_ main_vm;
3179 
3180 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3181   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3182   *vm  = (JavaVM *)(&main_vm);
3183   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3184   return JNI_OK;
3185 JNI_END
3186 
3187 
3188 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3189   return Modules::get_module(clazz, THREAD);
3190 JNI_END
3191 
3192 JNI_ENTRY(jboolean, jni_IsVirtualThread(JNIEnv* env, jobject obj))
3193   oop thread_obj = JNIHandles::resolve_external_guard(obj);
3194   if (thread_obj != nullptr && thread_obj->is_a(vmClasses::BaseVirtualThread_klass())) {
3195     return JNI_TRUE;
3196   } else {
3197     return JNI_FALSE;
3198   }
3199 JNI_END
3200 
3201 
3202 // Structure containing all jni functions
3203 struct JNINativeInterface_ jni_NativeInterface = {
3204     nullptr,
3205     nullptr,
3206     nullptr,
3207 
3208     nullptr,
3209 
3210     jni_GetVersion,
3211 
3212     jni_DefineClass,
3213     jni_FindClass,
3214 
3215     jni_FromReflectedMethod,
3216     jni_FromReflectedField,
3217 
3218     jni_ToReflectedMethod,
3219 
3220     jni_GetSuperclass,
3221     jni_IsAssignableFrom,
3222 
3223     jni_ToReflectedField,
3224 
3225     jni_Throw,
3226     jni_ThrowNew,
3227     jni_ExceptionOccurred,
3228     jni_ExceptionDescribe,
3229     jni_ExceptionClear,
3230     jni_FatalError,
3231 
3232     jni_PushLocalFrame,
3233     jni_PopLocalFrame,
3234 
3235     jni_NewGlobalRef,
3236     jni_DeleteGlobalRef,
3237     jni_DeleteLocalRef,
3238     jni_IsSameObject,
3239 
3240     jni_NewLocalRef,
3241     jni_EnsureLocalCapacity,
3242 
3243     jni_AllocObject,
3244     jni_NewObject,
3245     jni_NewObjectV,
3246     jni_NewObjectA,
3247 
3248     jni_GetObjectClass,
3249     jni_IsInstanceOf,
3250 
3251     jni_GetMethodID,
3252 
3253     jni_CallObjectMethod,
3254     jni_CallObjectMethodV,
3255     jni_CallObjectMethodA,
3256     jni_CallBooleanMethod,
3257     jni_CallBooleanMethodV,
3258     jni_CallBooleanMethodA,
3259     jni_CallByteMethod,
3260     jni_CallByteMethodV,
3261     jni_CallByteMethodA,
3262     jni_CallCharMethod,
3263     jni_CallCharMethodV,
3264     jni_CallCharMethodA,
3265     jni_CallShortMethod,
3266     jni_CallShortMethodV,
3267     jni_CallShortMethodA,
3268     jni_CallIntMethod,
3269     jni_CallIntMethodV,
3270     jni_CallIntMethodA,
3271     jni_CallLongMethod,
3272     jni_CallLongMethodV,
3273     jni_CallLongMethodA,
3274     jni_CallFloatMethod,
3275     jni_CallFloatMethodV,
3276     jni_CallFloatMethodA,
3277     jni_CallDoubleMethod,
3278     jni_CallDoubleMethodV,
3279     jni_CallDoubleMethodA,
3280     jni_CallVoidMethod,
3281     jni_CallVoidMethodV,
3282     jni_CallVoidMethodA,
3283 
3284     jni_CallNonvirtualObjectMethod,
3285     jni_CallNonvirtualObjectMethodV,
3286     jni_CallNonvirtualObjectMethodA,
3287     jni_CallNonvirtualBooleanMethod,
3288     jni_CallNonvirtualBooleanMethodV,
3289     jni_CallNonvirtualBooleanMethodA,
3290     jni_CallNonvirtualByteMethod,
3291     jni_CallNonvirtualByteMethodV,
3292     jni_CallNonvirtualByteMethodA,
3293     jni_CallNonvirtualCharMethod,
3294     jni_CallNonvirtualCharMethodV,
3295     jni_CallNonvirtualCharMethodA,
3296     jni_CallNonvirtualShortMethod,
3297     jni_CallNonvirtualShortMethodV,
3298     jni_CallNonvirtualShortMethodA,
3299     jni_CallNonvirtualIntMethod,
3300     jni_CallNonvirtualIntMethodV,
3301     jni_CallNonvirtualIntMethodA,
3302     jni_CallNonvirtualLongMethod,
3303     jni_CallNonvirtualLongMethodV,
3304     jni_CallNonvirtualLongMethodA,
3305     jni_CallNonvirtualFloatMethod,
3306     jni_CallNonvirtualFloatMethodV,
3307     jni_CallNonvirtualFloatMethodA,
3308     jni_CallNonvirtualDoubleMethod,
3309     jni_CallNonvirtualDoubleMethodV,
3310     jni_CallNonvirtualDoubleMethodA,
3311     jni_CallNonvirtualVoidMethod,
3312     jni_CallNonvirtualVoidMethodV,
3313     jni_CallNonvirtualVoidMethodA,
3314 
3315     jni_GetFieldID,
3316 
3317     jni_GetObjectField,
3318     jni_GetBooleanField,
3319     jni_GetByteField,
3320     jni_GetCharField,
3321     jni_GetShortField,
3322     jni_GetIntField,
3323     jni_GetLongField,
3324     jni_GetFloatField,
3325     jni_GetDoubleField,
3326 
3327     jni_SetObjectField,
3328     jni_SetBooleanField,
3329     jni_SetByteField,
3330     jni_SetCharField,
3331     jni_SetShortField,
3332     jni_SetIntField,
3333     jni_SetLongField,
3334     jni_SetFloatField,
3335     jni_SetDoubleField,
3336 
3337     jni_GetStaticMethodID,
3338 
3339     jni_CallStaticObjectMethod,
3340     jni_CallStaticObjectMethodV,
3341     jni_CallStaticObjectMethodA,
3342     jni_CallStaticBooleanMethod,
3343     jni_CallStaticBooleanMethodV,
3344     jni_CallStaticBooleanMethodA,
3345     jni_CallStaticByteMethod,
3346     jni_CallStaticByteMethodV,
3347     jni_CallStaticByteMethodA,
3348     jni_CallStaticCharMethod,
3349     jni_CallStaticCharMethodV,
3350     jni_CallStaticCharMethodA,
3351     jni_CallStaticShortMethod,
3352     jni_CallStaticShortMethodV,
3353     jni_CallStaticShortMethodA,
3354     jni_CallStaticIntMethod,
3355     jni_CallStaticIntMethodV,
3356     jni_CallStaticIntMethodA,
3357     jni_CallStaticLongMethod,
3358     jni_CallStaticLongMethodV,
3359     jni_CallStaticLongMethodA,
3360     jni_CallStaticFloatMethod,
3361     jni_CallStaticFloatMethodV,
3362     jni_CallStaticFloatMethodA,
3363     jni_CallStaticDoubleMethod,
3364     jni_CallStaticDoubleMethodV,
3365     jni_CallStaticDoubleMethodA,
3366     jni_CallStaticVoidMethod,
3367     jni_CallStaticVoidMethodV,
3368     jni_CallStaticVoidMethodA,
3369 
3370     jni_GetStaticFieldID,
3371 
3372     jni_GetStaticObjectField,
3373     jni_GetStaticBooleanField,
3374     jni_GetStaticByteField,
3375     jni_GetStaticCharField,
3376     jni_GetStaticShortField,
3377     jni_GetStaticIntField,
3378     jni_GetStaticLongField,
3379     jni_GetStaticFloatField,
3380     jni_GetStaticDoubleField,
3381 
3382     jni_SetStaticObjectField,
3383     jni_SetStaticBooleanField,
3384     jni_SetStaticByteField,
3385     jni_SetStaticCharField,
3386     jni_SetStaticShortField,
3387     jni_SetStaticIntField,
3388     jni_SetStaticLongField,
3389     jni_SetStaticFloatField,
3390     jni_SetStaticDoubleField,
3391 
3392     jni_NewString,
3393     jni_GetStringLength,
3394     jni_GetStringChars,
3395     jni_ReleaseStringChars,
3396 
3397     jni_NewStringUTF,
3398     jni_GetStringUTFLength,
3399     jni_GetStringUTFChars,
3400     jni_ReleaseStringUTFChars,
3401 
3402     jni_GetArrayLength,
3403 
3404     jni_NewObjectArray,
3405     jni_GetObjectArrayElement,
3406     jni_SetObjectArrayElement,
3407 
3408     jni_NewBooleanArray,
3409     jni_NewByteArray,
3410     jni_NewCharArray,
3411     jni_NewShortArray,
3412     jni_NewIntArray,
3413     jni_NewLongArray,
3414     jni_NewFloatArray,
3415     jni_NewDoubleArray,
3416 
3417     jni_GetBooleanArrayElements,
3418     jni_GetByteArrayElements,
3419     jni_GetCharArrayElements,
3420     jni_GetShortArrayElements,
3421     jni_GetIntArrayElements,
3422     jni_GetLongArrayElements,
3423     jni_GetFloatArrayElements,
3424     jni_GetDoubleArrayElements,
3425 
3426     jni_ReleaseBooleanArrayElements,
3427     jni_ReleaseByteArrayElements,
3428     jni_ReleaseCharArrayElements,
3429     jni_ReleaseShortArrayElements,
3430     jni_ReleaseIntArrayElements,
3431     jni_ReleaseLongArrayElements,
3432     jni_ReleaseFloatArrayElements,
3433     jni_ReleaseDoubleArrayElements,
3434 
3435     jni_GetBooleanArrayRegion,
3436     jni_GetByteArrayRegion,
3437     jni_GetCharArrayRegion,
3438     jni_GetShortArrayRegion,
3439     jni_GetIntArrayRegion,
3440     jni_GetLongArrayRegion,
3441     jni_GetFloatArrayRegion,
3442     jni_GetDoubleArrayRegion,
3443 
3444     jni_SetBooleanArrayRegion,
3445     jni_SetByteArrayRegion,
3446     jni_SetCharArrayRegion,
3447     jni_SetShortArrayRegion,
3448     jni_SetIntArrayRegion,
3449     jni_SetLongArrayRegion,
3450     jni_SetFloatArrayRegion,
3451     jni_SetDoubleArrayRegion,
3452 
3453     jni_RegisterNatives,
3454     jni_UnregisterNatives,
3455 
3456     jni_MonitorEnter,
3457     jni_MonitorExit,
3458 
3459     jni_GetJavaVM,
3460 
3461     jni_GetStringRegion,
3462     jni_GetStringUTFRegion,
3463 
3464     jni_GetPrimitiveArrayCritical,
3465     jni_ReleasePrimitiveArrayCritical,
3466 
3467     jni_GetStringCritical,
3468     jni_ReleaseStringCritical,
3469 
3470     jni_NewWeakGlobalRef,
3471     jni_DeleteWeakGlobalRef,
3472 
3473     jni_ExceptionCheck,
3474 
3475     jni_NewDirectByteBuffer,
3476     jni_GetDirectBufferAddress,
3477     jni_GetDirectBufferCapacity,
3478 
3479     // New 1_6 features
3480 
3481     jni_GetObjectRefType,
3482 
3483     // Module features
3484 
3485     jni_GetModule,
3486 
3487     // Virtual threads
3488 
3489     jni_IsVirtualThread
3490 };
3491 
3492 
3493 // For jvmti use to modify jni function table.
3494 // Java threads in native contiues to run until it is transitioned
3495 // to VM at safepoint. Before the transition or before it is blocked
3496 // for safepoint it may access jni function table. VM could crash if
3497 // any java thread access the jni function table in the middle of memcpy.
3498 // To avoid this each function pointers are copied automically.
3499 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3500   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3501   intptr_t *a = (intptr_t *) jni_functions();
3502   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3503   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3504     Atomic::store(a++, *b++);
3505   }
3506 }
3507 
3508 void quicken_jni_functions() {
3509   // Replace Get<Primitive>Field with fast versions
3510   if (UseFastJNIAccessors && !VerifyJNIFields && !CheckJNICalls) {
3511     address func;
3512     func = JNI_FastGetField::generate_fast_get_boolean_field();
3513     if (func != (address)-1) {
3514       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3515     }
3516     func = JNI_FastGetField::generate_fast_get_byte_field();
3517     if (func != (address)-1) {
3518       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3519     }
3520     func = JNI_FastGetField::generate_fast_get_char_field();
3521     if (func != (address)-1) {
3522       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3523     }
3524     func = JNI_FastGetField::generate_fast_get_short_field();
3525     if (func != (address)-1) {
3526       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3527     }
3528     func = JNI_FastGetField::generate_fast_get_int_field();
3529     if (func != (address)-1) {
3530       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3531     }
3532     func = JNI_FastGetField::generate_fast_get_long_field();
3533     if (func != (address)-1) {
3534       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3535     }
3536     func = JNI_FastGetField::generate_fast_get_float_field();
3537     if (func != (address)-1) {
3538       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3539     }
3540     func = JNI_FastGetField::generate_fast_get_double_field();
3541     if (func != (address)-1) {
3542       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3543     }
3544   }
3545 }
3546 
3547 // Returns the function structure
3548 struct JNINativeInterface_* jni_functions() {
3549 #if INCLUDE_JNI_CHECK
3550   if (CheckJNICalls) return jni_functions_check();
3551 #endif // INCLUDE_JNI_CHECK
3552   return &jni_NativeInterface;
3553 }
3554 
3555 // Returns the function structure
3556 struct JNINativeInterface_* jni_functions_nocheck() {
3557   return &jni_NativeInterface;
3558 }
3559 
3560 
3561 // Invocation API
3562 
3563 
3564 // Forward declaration
3565 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3566 
3567 // Global invocation API vars
3568 enum VM_Creation_State {
3569   NOT_CREATED = 0,
3570   IN_PROGRESS,  // Most JNI operations are permitted during this phase to
3571                 // allow for initialization actions by libraries and agents.
3572   COMPLETE
3573 };
3574 
3575 volatile VM_Creation_State vm_created = NOT_CREATED;
3576 
3577 // Indicate whether it is safe to recreate VM. Recreation is only
3578 // possible after a failed initial creation attempt in some cases.
3579 volatile int safe_to_recreate_vm = 1;
3580 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3581 
3582 
3583 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3584 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3585 
3586 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3587                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3588 
3589 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3590   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3591   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3592   jint ret = JNI_ERR;
3593   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3594 
3595   if (Threads::is_supported_jni_version(args->version)) {
3596     ret = JNI_OK;
3597   }
3598   // 1.1 style no longer supported in hotspot.
3599   // According the JNI spec, we should update args->version on return.
3600   // We also use the structure to communicate with launcher about default
3601   // stack size.
3602   if (args->version == JNI_VERSION_1_1) {
3603     args->version = JNI_VERSION_1_2;
3604     // javaStackSize is int in arguments structure
3605     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3606     args->javaStackSize = (jint)(ThreadStackSize * K);
3607   }
3608   return ret;
3609 }
3610 
3611 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3612                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3613 
3614 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3615   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3616 
3617   jint result = JNI_ERR;
3618   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3619 
3620   // We're about to use Atomic::xchg for synchronization.  Some Zero
3621   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3622   // but __sync_lock_test_and_set is not guaranteed to do what we want
3623   // on all architectures.  So we check it works before relying on it.
3624 #if defined(ZERO) && defined(ASSERT)
3625   {
3626     jint a = 0xcafebabe;
3627     jint b = Atomic::xchg(&a, (jint) 0xdeadbeef);
3628     void *c = &a;
3629     void *d = Atomic::xchg(&c, &b);
3630     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3631     assert(c == &b && d == &a, "Atomic::xchg() works");
3632   }
3633 #endif // ZERO && ASSERT
3634 
3635   // At the moment it's only possible to have one Java VM,
3636   // since some of the runtime state is in global variables.
3637 
3638   // We cannot use our mutex locks here, since they only work on
3639   // Threads. We do an atomic compare and exchange to ensure only
3640   // one thread can call this method at a time
3641 
3642   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3643   // the add/dec implementations are dependent on whether we are running
3644   // on a multiprocessor Atomic::xchg does not have this problem.
3645   if (Atomic::xchg(&vm_created, IN_PROGRESS) != NOT_CREATED) {
3646     return JNI_EEXIST;   // already created, or create attempt in progress
3647   }
3648 
3649   // If a previous creation attempt failed but can be retried safely,
3650   // then safe_to_recreate_vm will have been reset to 1 after being
3651   // cleared here. If a previous creation attempt succeeded and we then
3652   // destroyed that VM, we will be prevented from trying to recreate
3653   // the VM in the same process, as the value will still be 0.
3654   if (Atomic::xchg(&safe_to_recreate_vm, 0) == 0) {
3655     return JNI_ERR;
3656   }
3657 
3658   /**
3659    * Certain errors during initialization are recoverable and do not
3660    * prevent this method from being called again at a later time
3661    * (perhaps with different arguments).  However, at a certain
3662    * point during initialization if an error occurs we cannot allow
3663    * this function to be called again (or it will crash).  In those
3664    * situations, the 'canTryAgain' flag is set to false, which atomically
3665    * sets safe_to_recreate_vm to 1, such that any new call to
3666    * JNI_CreateJavaVM will immediately fail using the above logic.
3667    */
3668   bool can_try_again = true;
3669 
3670   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3671   if (result == JNI_OK) {
3672     JavaThread *thread = JavaThread::current();
3673     assert(!thread->has_pending_exception(), "should have returned not OK");
3674     // thread is thread_in_vm here
3675     *vm = (JavaVM *)(&main_vm);
3676     *(JNIEnv**)penv = thread->jni_environment();
3677     // mark creation complete for other JNI ops
3678     Atomic::release_store(&vm_created, COMPLETE);
3679 
3680 #if INCLUDE_JVMCI
3681     if (EnableJVMCI) {
3682       if (UseJVMCICompiler) {
3683         // JVMCI is initialized on a CompilerThread
3684         if (BootstrapJVMCI) {
3685           JavaThread* THREAD = thread; // For exception macros.
3686           JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3687           compiler->bootstrap(THREAD);
3688           if (HAS_PENDING_EXCEPTION) {
3689             HandleMark hm(THREAD);
3690             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3691           }
3692         }
3693       }
3694     }
3695 #endif
3696 
3697     // Notify JVMTI
3698     if (JvmtiExport::should_post_thread_life()) {
3699        JvmtiExport::post_thread_start(thread);
3700     }
3701 
3702     JFR_ONLY(Jfr::on_thread_start(thread);)
3703 
3704     if (ReplayCompiles) ciReplay::replay(thread);
3705 
3706 #ifdef ASSERT
3707     // Some platforms (like Win*) need a wrapper around these test
3708     // functions in order to properly handle error conditions.
3709     if (ErrorHandlerTest != 0) {
3710       VMError::controlled_crash(ErrorHandlerTest);
3711     }
3712 #endif
3713 
3714     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3715     ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3716     MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3717   } else {
3718     // If create_vm exits because of a pending exception, exit with that
3719     // exception.  In the future when we figure out how to reclaim memory,
3720     // we may be able to exit with JNI_ERR and allow the calling application
3721     // to continue.
3722     if (Universe::is_fully_initialized()) {
3723       // otherwise no pending exception possible - VM will already have aborted
3724       Thread* current = Thread::current_or_null();
3725       if (current != nullptr) {
3726         JavaThread* THREAD = JavaThread::cast(current); // For exception macros.
3727         assert(HAS_PENDING_EXCEPTION, "must be - else no current thread exists");
3728         HandleMark hm(THREAD);
3729         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3730       }
3731     }
3732 
3733     if (can_try_again) {
3734       // reset safe_to_recreate_vm to 1 so that retrial would be possible
3735       safe_to_recreate_vm = 1;
3736     }
3737 
3738     // Creation failed. We must reset vm_created
3739     *vm = 0;
3740     *(JNIEnv**)penv = 0;
3741     // reset vm_created last to avoid race condition. Use OrderAccess to
3742     // control both compiler and architectural-based reordering.
3743     assert(vm_created == IN_PROGRESS, "must be");
3744     Atomic::release_store(&vm_created, NOT_CREATED);
3745   }
3746 
3747   // Flush stdout and stderr before exit.
3748   fflush(stdout);
3749   fflush(stderr);
3750 
3751   return result;
3752 
3753 }
3754 
3755 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3756   jint result = JNI_ERR;
3757   // On Windows, let CreateJavaVM run with SEH protection
3758 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3759   __try {
3760 #endif
3761     result = JNI_CreateJavaVM_inner(vm, penv, args);
3762 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3763   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3764     // Nothing to do.
3765   }
3766 #endif
3767   return result;
3768 }
3769 
3770 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
3771   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
3772 
3773   if (vm_created == COMPLETE) {
3774     if (numVMs != nullptr) *numVMs = 1;
3775     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
3776   } else {
3777     if (numVMs != nullptr) *numVMs = 0;
3778   }
3779   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
3780   return JNI_OK;
3781 }
3782 
3783 extern "C" {
3784 
3785 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
3786                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
3787 
3788 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
3789   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
3790   jint res = JNI_ERR;
3791   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
3792 
3793   if (vm_created == NOT_CREATED) {
3794     res = JNI_ERR;
3795     return res;
3796   }
3797 
3798   JNIEnv *env;
3799   JavaVMAttachArgs destroyargs;
3800   destroyargs.version = CurrentVersion;
3801   destroyargs.name = (char *)"DestroyJavaVM";
3802   destroyargs.group = nullptr;
3803   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
3804   if (res != JNI_OK) {
3805     return res;
3806   }
3807 
3808   JavaThread* thread = JavaThread::current();
3809 
3810   // Make sure we are actually in a newly attached thread, with no
3811   // existing Java frame.
3812   if (thread->has_last_Java_frame()) {
3813     return JNI_ERR;
3814   }
3815 
3816   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
3817 
3818   // We are going to VM, change W^X state to the expected one.
3819   MACOS_AARCH64_ONLY(WXMode oldmode = thread->enable_wx(WXWrite));
3820 
3821   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
3822   Threads::destroy_vm();
3823   // Don't bother restoring thread state, VM is gone.
3824   vm_created = NOT_CREATED;
3825   return JNI_OK;
3826 }
3827 
3828 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
3829   jint result = JNI_ERR;
3830   // On Windows, we need SEH protection
3831 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3832   __try {
3833 #endif
3834     result = jni_DestroyJavaVM_inner(vm);
3835 #if defined(_WIN32) && !defined(USE_VECTORED_EXCEPTION_HANDLING)
3836   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
3837     // Nothing to do.
3838   }
3839 #endif
3840   return result;
3841 }
3842 
3843 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
3844   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
3845 
3846   // Check below commented out from JDK1.2fcs as well
3847   /*
3848   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
3849     return JNI_EVERSION;
3850   }
3851   */
3852 
3853   Thread* t = Thread::current_or_null();
3854   if (t != nullptr) {
3855     // If executing from an atexit hook we may be in the VMThread.
3856     if (t->is_Java_thread()) {
3857       // If the thread has been attached this operation is a no-op
3858       *(JNIEnv**)penv = JavaThread::cast(t)->jni_environment();
3859       return JNI_OK;
3860     } else {
3861       return JNI_ERR;
3862     }
3863   }
3864 
3865   // Create a thread and mark it as attaching so it will be skipped by the
3866   // ThreadsListEnumerator - see CR 6404306
3867   JavaThread* thread = new JavaThread(true);
3868 
3869   // Set correct safepoint info. The thread is going to call into Java when
3870   // initializing the Java level thread object. Hence, the correct state must
3871   // be set in order for the Safepoint code to deal with it correctly.
3872   thread->set_thread_state(_thread_in_vm);
3873   thread->record_stack_base_and_size();
3874   thread->register_thread_stack_with_NMT();
3875   thread->initialize_thread_current();
3876   MACOS_AARCH64_ONLY(thread->init_wx());
3877 
3878   if (!os::create_attached_thread(thread)) {
3879     thread->smr_delete();
3880     return JNI_ERR;
3881   }
3882   // Enable stack overflow checks
3883   thread->stack_overflow_state()->create_stack_guard_pages();
3884 
3885   thread->initialize_tlab();
3886 
3887   thread->cache_global_variables();
3888 
3889   // This thread will not do a safepoint check, since it has
3890   // not been added to the Thread list yet.
3891   { MutexLocker ml(Threads_lock);
3892     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
3893     // avoid this thread trying to do a GC before it is added to the thread-list
3894     thread->set_active_handles(JNIHandleBlock::allocate_block());
3895     Threads::add(thread, daemon);
3896   }
3897   // Create thread group and name info from attach arguments
3898   oop group = nullptr;
3899   char* thread_name = nullptr;
3900   if (args != nullptr && Threads::is_supported_jni_version(args->version)) {
3901     group = JNIHandles::resolve(args->group);
3902     thread_name = args->name; // may be null
3903   }
3904   if (group == nullptr) group = Universe::main_thread_group();
3905 
3906   // Create Java level thread object and attach it to this thread
3907   bool attach_failed = false;
3908   {
3909     EXCEPTION_MARK;
3910     HandleMark hm(THREAD);
3911     Handle thread_group(THREAD, group);
3912     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
3913     if (HAS_PENDING_EXCEPTION) {
3914       CLEAR_PENDING_EXCEPTION;
3915       // cleanup outside the handle mark.
3916       attach_failed = true;
3917     }
3918   }
3919 
3920   if (attach_failed) {
3921     // Added missing cleanup
3922     thread->cleanup_failed_attach_current_thread(daemon);
3923     return JNI_ERR;
3924   }
3925 
3926   // mark the thread as no longer attaching
3927   // this uses a fence to push the change through so we don't have
3928   // to regrab the threads_lock
3929   thread->set_done_attaching_via_jni();
3930 
3931   // Set java thread status.
3932   java_lang_Thread::set_thread_status(thread->threadObj(),
3933               JavaThreadStatus::RUNNABLE);
3934 
3935   // Notify the debugger
3936   if (JvmtiExport::should_post_thread_life()) {
3937     JvmtiExport::post_thread_start(thread);
3938   }
3939 
3940   JFR_ONLY(Jfr::on_thread_start(thread);)
3941 
3942   *(JNIEnv**)penv = thread->jni_environment();
3943 
3944   // Now leaving the VM, so change thread_state. This is normally automatically taken care
3945   // of in the JVM_ENTRY. But in this situation we have to do it manually.
3946   ThreadStateTransition::transition_from_vm(thread, _thread_in_native);
3947   MACOS_AARCH64_ONLY(thread->enable_wx(WXExec));
3948 
3949   // Perform any platform dependent FPU setup
3950   os::setup_fpu();
3951 
3952   return JNI_OK;
3953 }
3954 
3955 
3956 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
3957   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
3958   if (vm_created == NOT_CREATED) {
3959     // Not sure how we could possibly get here.
3960     HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3961     return JNI_ERR;
3962   }
3963 
3964   jint ret = attach_current_thread(vm, penv, _args, false);
3965   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
3966   return ret;
3967 }
3968 
3969 
3970 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
3971   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
3972   if (vm_created == NOT_CREATED) {
3973     // Not sure how we could possibly get here.
3974     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_ERR);
3975     return JNI_ERR;
3976   }
3977 
3978   Thread* current = Thread::current_or_null();
3979 
3980   // If the thread has already been detached the operation is a no-op
3981   if (current == nullptr) {
3982     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
3983     return JNI_OK;
3984   }
3985 
3986   // If executing from an atexit hook we may be in the VMThread.
3987   if (!current->is_Java_thread()) {
3988     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3989     return JNI_ERR;
3990   }
3991 
3992   VM_Exit::block_if_vm_exited();
3993 
3994   JavaThread* thread = JavaThread::cast(current);
3995   if (thread->has_last_Java_frame()) {
3996     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
3997     // Can't detach a thread that's running java, that can't work.
3998     return JNI_ERR;
3999   }
4000 
4001   // We are going to VM, change W^X state to the expected one.
4002   MACOS_AARCH64_ONLY(thread->enable_wx(WXWrite));
4003 
4004   // Safepoint support. Have to do call-back to safepoint code, if in the
4005   // middle of a safepoint operation
4006   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4007 
4008   // XXX: Note that JavaThread::exit() call below removes the guards on the
4009   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4010   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4011   // of the guards is visible in jni_AttachCurrentThread above,
4012   // the removal of the guards is buried below in JavaThread::exit()
4013   // here. The abstraction should be more symmetrically either exposed
4014   // or hidden (e.g. it could probably be hidden in the same
4015   // (platform-dependent) methods where we do alternate stack
4016   // maintenance work?)
4017   thread->exit(false, JavaThread::jni_detach);
4018   thread->smr_delete();
4019 
4020   // Go to the execute mode, the initial state of the thread on creation.
4021   // Use os interface as the thread is not a JavaThread anymore.
4022   MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
4023 
4024   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4025   return JNI_OK;
4026 }
4027 
4028 DT_RETURN_MARK_DECL(GetEnv, jint
4029                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4030 
4031 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4032   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4033   jint ret = JNI_ERR;
4034   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4035 
4036   if (vm_created == NOT_CREATED) {
4037     *penv = nullptr;
4038     ret = JNI_EDETACHED;
4039     return ret;
4040   }
4041 
4042   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4043     return ret;
4044   }
4045 
4046 #ifndef JVMPI_VERSION_1
4047 // need these in order to be polite about older agents
4048 #define JVMPI_VERSION_1   ((jint)0x10000001)
4049 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4050 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4051 #endif // !JVMPI_VERSION_1
4052 
4053   Thread* thread = Thread::current_or_null();
4054   if (thread != nullptr && thread->is_Java_thread()) {
4055     if (Threads::is_supported_jni_version_including_1_1(version)) {
4056       *(JNIEnv**)penv = JavaThread::cast(thread)->jni_environment();
4057       ret = JNI_OK;
4058       return ret;
4059 
4060     } else if (version == JVMPI_VERSION_1 ||
4061                version == JVMPI_VERSION_1_1 ||
4062                version == JVMPI_VERSION_1_2) {
4063       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4064       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4065       ret = JNI_EVERSION;
4066       return ret;
4067     } else if (JvmtiExport::is_jvmdi_version(version)) {
4068       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4069       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4070       ret = JNI_EVERSION;
4071       return ret;
4072     } else {
4073       *penv = nullptr;
4074       ret = JNI_EVERSION;
4075       return ret;
4076     }
4077   } else {
4078     *penv = nullptr;
4079     ret = JNI_EDETACHED;
4080     return ret;
4081   }
4082 }
4083 
4084 
4085 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4086   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4087   if (vm_created == NOT_CREATED) {
4088     // Not sure how we could possibly get here.
4089     HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4090     return JNI_ERR;
4091   }
4092 
4093   jint ret = attach_current_thread(vm, penv, _args, true);
4094   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4095   return ret;
4096 }
4097 
4098 
4099 } // End extern "C"
4100 
4101 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4102     nullptr,
4103     nullptr,
4104     nullptr,
4105 
4106     jni_DestroyJavaVM,
4107     jni_AttachCurrentThread,
4108     jni_DetachCurrentThread,
4109     jni_GetEnv,
4110     jni_AttachCurrentThreadAsDaemon
4111 };