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