1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "jni.h"
  28 #include "jvm.h"
  29 #include "ci/ciReplay.hpp"
  30 #include "classfile/altHashing.hpp"
  31 #include "classfile/classFileStream.hpp"
  32 #include "classfile/classLoader.hpp"
  33 #include "classfile/javaClasses.hpp"
  34 #include "classfile/javaClasses.inline.hpp"
  35 #include "classfile/modules.hpp"
  36 #include "classfile/symbolTable.hpp"
  37 #include "classfile/systemDictionary.hpp"
  38 #include "classfile/vmSymbols.hpp"
  39 #include "gc/shared/gcLocker.inline.hpp"
  40 #include "interpreter/linkResolver.hpp"
  41 #include "jfr/jfrEvents.hpp"
  42 #include "jfr/support/jfrThreadId.hpp"
  43 #include "logging/log.hpp"
  44 #include "memory/allocation.hpp"
  45 #include "memory/allocation.inline.hpp"
  46 #include "memory/oopFactory.hpp"
  47 #include "memory/resourceArea.hpp"
  48 #include "memory/universe.hpp"
  49 #include "oops/access.inline.hpp"
  50 #include "oops/arrayOop.inline.hpp"
  51 #include "oops/instanceKlass.hpp"
  52 #include "oops/instanceOop.hpp"
  53 #include "oops/markWord.hpp"
  54 #include "oops/method.hpp"
  55 #include "oops/objArrayKlass.hpp"
  56 #include "oops/objArrayOop.inline.hpp"
  57 #include "oops/oop.inline.hpp"
  58 #include "oops/symbol.hpp"
  59 #include "oops/typeArrayKlass.hpp"
  60 #include "oops/typeArrayOop.inline.hpp"
  61 #include "prims/jniCheck.hpp"
  62 #include "prims/jniExport.hpp"
  63 #include "prims/jniFastGetField.hpp"
  64 #include "prims/jvm_misc.hpp"
  65 #include "prims/jvmtiExport.hpp"
  66 #include "prims/jvmtiThreadState.hpp"
  67 #include "runtime/atomic.hpp"
  68 #include "runtime/compilationPolicy.hpp"
  69 #include "runtime/deoptimization.hpp"
  70 #include "runtime/fieldDescriptor.inline.hpp"
  71 #include "runtime/handles.inline.hpp"
  72 #include "runtime/interfaceSupport.inline.hpp"
  73 #include "runtime/java.hpp"
  74 #include "runtime/javaCalls.hpp"
  75 #include "runtime/jfieldIDWorkaround.hpp"
  76 #include "runtime/jniHandles.inline.hpp"
  77 #include "runtime/orderAccess.hpp"
  78 #include "runtime/reflection.hpp"
  79 #include "runtime/safepointVerifiers.hpp"
  80 #include "runtime/sharedRuntime.hpp"
  81 #include "runtime/signature.hpp"
  82 #include "runtime/thread.inline.hpp"
  83 #include "runtime/vmOperations.hpp"
  84 #include "services/memTracker.hpp"
  85 #include "services/runtimeService.hpp"
  86 #include "utilities/defaultStream.hpp"
  87 #include "utilities/dtrace.hpp"
  88 #include "utilities/events.hpp"
  89 #include "utilities/histogram.hpp"
  90 #include "utilities/macros.hpp"
  91 #include "utilities/vmError.hpp"
  92 
  93 static jint CurrentVersion = JNI_VERSION_10;
  94 
  95 #ifdef _WIN32
  96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
  97 #endif
  98 
  99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
 100 // '-return' probe regardless of the return path is taken out of the function.
 101 // Methods that have multiple return paths use this to avoid having to
 102 // instrument each return path.  Methods that use CHECK or THROW must use this
 103 // since those macros can cause an immedate uninstrumented return.
 104 //
 105 // In order to get the return value, a reference to the variable containing
 106 // the return value must be passed to the contructor of the object, and
 107 // the return value must be set before return (since the mark object has
 108 // a reference to it).
 109 //
 110 // Example:
 111 // DT_RETURN_MARK_DECL(SomeFunc, int);
 112 // JNI_ENTRY(int, SomeFunc, ...)
 113 //   int return_value = 0;
 114 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 115 //   foo(CHECK_0)
 116 //   return_value = 5;
 117 //   return return_value;
 118 // JNI_END
 119 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 120   DTRACE_ONLY(                                                             \
 121     class DTraceReturnProbeMark_##name {                                   \
 122      public:                                                               \
 123       const type& _ret_ref;                                                \
 124       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 125       ~DTraceReturnProbeMark_##name() {                                    \
 126         probe;                                                             \
 127       }                                                                    \
 128     }                                                                      \
 129   )
 130 // Void functions are simpler since there's no return value
 131 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 132   DTRACE_ONLY(                                                             \
 133     class DTraceReturnProbeMark_##name {                                   \
 134      public:                                                               \
 135       ~DTraceReturnProbeMark_##name() {                                    \
 136         probe;                                                             \
 137       }                                                                    \
 138     }                                                                      \
 139   )
 140 
 141 // Place these macros in the function to mark the return.  Non-void
 142 // functions need the type and address of the return value.
 143 #define DT_RETURN_MARK(name, type, ref) \
 144   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 145 #define DT_VOID_RETURN_MARK(name) \
 146   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 147 
 148 
 149 // Use these to select distinct code for floating-point vs. non-floating point
 150 // situations.  Used from within common macros where we need slightly
 151 // different behavior for Float/Double
 152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 153 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 154 #define FP_SELECT_Char(intcode, fpcode)    intcode
 155 #define FP_SELECT_Short(intcode, fpcode)   intcode
 156 #define FP_SELECT_Object(intcode, fpcode)  intcode
 157 #define FP_SELECT_Int(intcode, fpcode)     intcode
 158 #define FP_SELECT_Long(intcode, fpcode)    intcode
 159 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 160 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 161 #define FP_SELECT(TypeName, intcode, fpcode) \
 162   FP_SELECT_##TypeName(intcode, fpcode)
 163 
 164 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 165 // (dtrace doesn't do FP yet)
 166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 167   FP_SELECT(TypeName, \
 168     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 170   FP_SELECT(TypeName, \
 171     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 172 
 173 
 174 // out-of-line helpers for class jfieldIDWorkaround:
 175 
 176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 177   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 178     uintptr_t as_uint = (uintptr_t) id;
 179     intptr_t offset = raw_instance_offset(id);
 180     if (is_checked_jfieldID(id)) {
 181       if (!klass_hash_ok(k, id)) {
 182         return false;
 183       }
 184     }
 185     return InstanceKlass::cast(k)->contains_field_offset(offset);
 186   } else {
 187     JNIid* result = (JNIid*) id;
 188 #ifdef ASSERT
 189     return result != NULL && result->is_static_field_id();
 190 #else
 191     return result != NULL;
 192 #endif
 193   }
 194 }
 195 
 196 
 197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
 198   if (offset <= small_offset_mask) {
 199     Klass* field_klass = k;
 200     Klass* super_klass = field_klass->super();
 201     // With compressed oops the most super class with nonstatic fields would
 202     // be the owner of fields embedded in the header.
 203     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 204            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 205       field_klass = super_klass;   // super contains the field also
 206       super_klass = field_klass->super();
 207     }
 208     debug_only(NoSafepointVerifier nosafepoint;)
 209     uintptr_t klass_hash = field_klass->identity_hash();
 210     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 211   } else {
 212 #if 0
 213     #ifndef PRODUCT
 214     {
 215       ResourceMark rm;
 216       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 217     }
 218     #endif
 219 #endif
 220     return 0;
 221   }
 222 }
 223 
 224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 225   uintptr_t as_uint = (uintptr_t) id;
 226   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 227   do {
 228     debug_only(NoSafepointVerifier nosafepoint;)
 229     // Could use a non-blocking query for identity_hash here...
 230     if ((k->identity_hash() & klass_mask) == klass_hash)
 231       return true;
 232     k = k->super();
 233   } while (k != NULL);
 234   return false;
 235 }
 236 
 237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 238   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 239   uintptr_t as_uint = (uintptr_t) id;
 240   intptr_t offset = raw_instance_offset(id);
 241   if (VerifyJNIFields) {
 242     if (is_checked_jfieldID(id)) {
 243       guarantee(klass_hash_ok(k, id),
 244     "Bug in native code: jfieldID class must match object");
 245     } else {
 246 #if 0
 247       #ifndef PRODUCT
 248       if (Verbose) {
 249   ResourceMark rm;
 250   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 251       }
 252       #endif
 253 #endif
 254     }
 255   }
 256   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 257       "Bug in native code: jfieldID offset must address interior of object");
 258 }
 259 
 260 // Wrapper to trace JNI functions
 261 
 262 #ifdef ASSERT
 263   Histogram* JNIHistogram;
 264   static volatile int JNIHistogram_lock = 0;
 265 
 266   class JNIHistogramElement : public HistogramElement {
 267     public:
 268      JNIHistogramElement(const char* name);
 269   };
 270 
 271   JNIHistogramElement::JNIHistogramElement(const char* elementName) {
 272     _name = elementName;
 273     uintx count = 0;
 274 
 275     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
 276       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
 277         count +=1;
 278         if ( (WarnOnStalledSpinLock > 0)
 279           && (count % WarnOnStalledSpinLock == 0)) {
 280           warning("JNIHistogram_lock seems to be stalled");
 281         }
 282       }
 283      }
 284 
 285 
 286     if(JNIHistogram == NULL)
 287       JNIHistogram = new Histogram("JNI Call Counts",100);
 288 
 289     JNIHistogram->add_element(this);
 290     Atomic::dec(&JNIHistogram_lock);
 291   }
 292 
 293   #define JNICountWrapper(arg)                                     \
 294      static JNIHistogramElement* e = new JNIHistogramElement(arg); \
 295       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
 296      if (e != NULL) e->increment_count()
 297   #define JNIWrapper(arg) JNICountWrapper(arg);
 298 #else
 299   #define JNIWrapper(arg)
 300 #endif
 301 
 302 
 303 // Implementation of JNI entries
 304 
 305 DT_RETURN_MARK_DECL(DefineClass, jclass
 306                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 307 
 308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 309                                   const jbyte *buf, jsize bufLen))
 310   JNIWrapper("DefineClass");
 311 
 312   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 313     env, (char*) name, loaderRef, (char*) buf, bufLen);
 314 
 315   jclass cls = NULL;
 316   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 317 
 318   TempNewSymbol class_name = NULL;
 319   // Since exceptions can be thrown, class initialization can take place
 320   // if name is NULL no check for class name in .class stream has to be made.
 321   if (name != NULL) {
 322     const int str_len = (int)strlen(name);
 323     if (str_len > Symbol::max_length()) {
 324       // It's impossible to create this class;  the name cannot fit
 325       // into the constant pool.
 326       Exceptions::fthrow(THREAD_AND_LOCATION,
 327                          vmSymbols::java_lang_NoClassDefFoundError(),
 328                          "Class name exceeds maximum length of %d: %s",
 329                          Symbol::max_length(),
 330                          name);
 331       return 0;
 332     }
 333     class_name = SymbolTable::new_symbol(name);
 334   }
 335   ResourceMark rm(THREAD);
 336   ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
 337   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 338 
 339   if (UsePerfData && !class_loader.is_null()) {
 340     // check whether the current caller thread holds the lock or not.
 341     // If not, increment the corresponding counter
 342     if (ObjectSynchronizer::
 343         query_lock_ownership((JavaThread*)THREAD, class_loader) !=
 344         ObjectSynchronizer::owner_self) {
 345       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
 346     }
 347   }
 348   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 349                                                    class_loader,
 350                                                    Handle(),
 351                                                    &st,
 352                                                    CHECK_NULL);
 353 
 354   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 355     trace_class_resolution(k);
 356   }
 357 
 358   cls = (jclass)JNIHandles::make_local(
 359     env, k->java_mirror());
 360   return cls;
 361 JNI_END
 362 
 363 
 364 
 365 DT_RETURN_MARK_DECL(FindClass, jclass
 366                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 367 
 368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 369   JNIWrapper("FindClass");
 370 
 371   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 372 
 373   jclass result = NULL;
 374   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 375 
 376   // Sanity check the name:  it cannot be null or larger than the maximum size
 377   // name we can fit in the constant pool.
 378   if (name == NULL) {
 379     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 380   }
 381   if ((int)strlen(name) > Symbol::max_length()) {
 382     Exceptions::fthrow(THREAD_AND_LOCATION,
 383                        vmSymbols::java_lang_NoClassDefFoundError(),
 384                        "Class name exceeds maximum length of %d: %s",
 385                        Symbol::max_length(),
 386                        name);
 387     return 0;
 388   }
 389 
 390   //%note jni_3
 391   Handle protection_domain;
 392   // Find calling class
 393   Klass* k = thread->security_get_caller_class(0);
 394   // default to the system loader when no context
 395   Handle loader(THREAD, SystemDictionary::java_system_loader());
 396   if (k != NULL) {
 397     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 398     // in the correct class context.
 399     if (k->class_loader() == NULL &&
 400         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 401       JavaValue result(T_OBJECT);
 402       JavaCalls::call_static(&result, k,
 403                              vmSymbols::getFromClass_name(),
 404                              vmSymbols::void_class_signature(),
 405                              CHECK_NULL);
 406       // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
 407       // a non-NULL Class object.  When invoked from JNI_OnUnload,
 408       // it will return NULL to indicate no context.
 409       oop mirror = (oop) result.get_jobject();
 410       if (mirror != NULL) {
 411         Klass* fromClass = java_lang_Class::as_Klass(mirror);
 412         loader = Handle(THREAD, fromClass->class_loader());
 413         protection_domain = Handle(THREAD, fromClass->protection_domain());
 414       }
 415     } else {
 416       loader = Handle(THREAD, k->class_loader());
 417     }
 418   }
 419 
 420   TempNewSymbol sym = SymbolTable::new_symbol(name);
 421   result = find_class_from_class_loader(env, sym, true, loader,
 422                                         protection_domain, true, thread);
 423 
 424   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 425     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 426   }
 427 
 428   return result;
 429 JNI_END
 430 
 431 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 432                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 433 
 434 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 435   JNIWrapper("FromReflectedMethod");
 436 
 437   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 438 
 439   jmethodID ret = NULL;
 440   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 441 
 442   // method is a handle to a java.lang.reflect.Method object
 443   oop reflected  = JNIHandles::resolve_non_null(method);
 444   oop mirror     = NULL;
 445   int slot       = 0;
 446 
 447   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 448     mirror = java_lang_reflect_Constructor::clazz(reflected);
 449     slot   = java_lang_reflect_Constructor::slot(reflected);
 450   } else {
 451     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 452     mirror = java_lang_reflect_Method::clazz(reflected);
 453     slot   = java_lang_reflect_Method::slot(reflected);
 454   }
 455   Klass* k1 = java_lang_Class::as_Klass(mirror);
 456 
 457   // Make sure class is initialized before handing id's out to methods
 458   k1->initialize(CHECK_NULL);
 459   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 460   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 461   return ret;
 462 JNI_END
 463 
 464 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 465                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 466 
 467 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 468   JNIWrapper("FromReflectedField");
 469 
 470   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 471 
 472   jfieldID ret = NULL;
 473   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 474 
 475   // field is a handle to a java.lang.reflect.Field object
 476   oop reflected   = JNIHandles::resolve_non_null(field);
 477   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 478   Klass* k1       = java_lang_Class::as_Klass(mirror);
 479   int slot        = java_lang_reflect_Field::slot(reflected);
 480   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 481 
 482   // Make sure class is initialized before handing id's out to fields
 483   k1->initialize(CHECK_NULL);
 484 
 485   // First check if this is a static field
 486   if (modifiers & JVM_ACC_STATIC) {
 487     intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 488     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 489     assert(id != NULL, "corrupt Field object");
 490     debug_only(id->set_is_static_field_id();)
 491     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 492     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 493     return ret;
 494   }
 495 
 496   // The slot is the index of the field description in the field-array
 497   // The jfieldID is the offset of the field within the object
 498   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 499   intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 500   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 501   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
 502   return ret;
 503 JNI_END
 504 
 505 
 506 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 507                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 508 
 509 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 510   JNIWrapper("ToReflectedMethod");
 511 
 512   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 513 
 514   jobject ret = NULL;
 515   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 516 
 517   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 518   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 519   oop reflection_method;
 520   if (m->is_initializer()) {
 521     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 522   } else {
 523     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 524   }
 525   ret = JNIHandles::make_local(env, reflection_method);
 526   return ret;
 527 JNI_END
 528 
 529 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 530                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 531 
 532 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 533   JNIWrapper("GetSuperclass");
 534 
 535   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 536 
 537   jclass obj = NULL;
 538   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 539 
 540   oop mirror = JNIHandles::resolve_non_null(sub);
 541   // primitive classes return NULL
 542   if (java_lang_Class::is_primitive(mirror)) return NULL;
 543 
 544   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 545   // arrays return Object
 546   // interfaces return NULL
 547   // proper classes return Klass::super()
 548   Klass* k = java_lang_Class::as_Klass(mirror);
 549   if (k->is_interface()) return NULL;
 550 
 551   // return mirror for superclass
 552   Klass* super = k->java_super();
 553   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 554   debug_only(Klass* super2 = ( k->is_array_klass()
 555                                  ? SystemDictionary::Object_klass()
 556                                  : k->super() ) );
 557   assert(super == super2,
 558          "java_super computation depends on interface, array, other super");
 559   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 560   return obj;
 561 JNI_END
 562 
 563 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 564   JNIWrapper("IsSubclassOf");
 565 
 566   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 567 
 568   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 569   oop super_mirror = JNIHandles::resolve_non_null(super);
 570   if (java_lang_Class::is_primitive(sub_mirror) ||
 571       java_lang_Class::is_primitive(super_mirror)) {
 572     jboolean ret = oopDesc::equals(sub_mirror, super_mirror);
 573 
 574     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 575     return ret;
 576   }
 577   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 578   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 579   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 580   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 581                    JNI_TRUE : JNI_FALSE;
 582 
 583   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 584   return ret;
 585 JNI_END
 586 
 587 
 588 DT_RETURN_MARK_DECL(Throw, jint
 589                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 590 
 591 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 592   JNIWrapper("Throw");
 593 
 594   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 595 
 596   jint ret = JNI_OK;
 597   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 598 
 599   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 600   ShouldNotReachHere();
 601   return 0;  // Mute compiler.
 602 JNI_END
 603 
 604 
 605 DT_RETURN_MARK_DECL(ThrowNew, jint
 606                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 607 
 608 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 609   JNIWrapper("ThrowNew");
 610 
 611   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 612 
 613   jint ret = JNI_OK;
 614   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 615 
 616   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 617   Symbol*  name = k->name();
 618   Handle class_loader (THREAD,  k->class_loader());
 619   Handle protection_domain (THREAD, k->protection_domain());
 620   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 621   ShouldNotReachHere();
 622   return 0;  // Mute compiler.
 623 JNI_END
 624 
 625 
 626 // JNI functions only transform a pending async exception to a synchronous
 627 // exception in ExceptionOccurred and ExceptionCheck calls, since
 628 // delivering an async exception in other places won't change the native
 629 // code's control flow and would be harmful when native code further calls
 630 // JNI functions with a pending exception. Async exception is also checked
 631 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 632 // false but deliver the async exception at the very end during
 633 // state transition.
 634 
 635 static void jni_check_async_exceptions(JavaThread *thread) {
 636   assert(thread == Thread::current(), "must be itself");
 637   thread->check_and_handle_async_exceptions();
 638 }
 639 
 640 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 641   JNIWrapper("ExceptionOccurred");
 642 
 643   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 644 
 645   jni_check_async_exceptions(thread);
 646   oop exception = thread->pending_exception();
 647   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 648 
 649   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 650   return ret;
 651 JNI_END
 652 
 653 
 654 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 655   JNIWrapper("ExceptionDescribe");
 656 
 657   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 658 
 659   if (thread->has_pending_exception()) {
 660     Handle ex(thread, thread->pending_exception());
 661     thread->clear_pending_exception();
 662     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 663       // Don't print anything if we are being killed.
 664     } else {
 665       jio_fprintf(defaultStream::error_stream(), "Exception ");
 666       if (thread != NULL && thread->threadObj() != NULL) {
 667         ResourceMark rm(THREAD);
 668         jio_fprintf(defaultStream::error_stream(),
 669         "in thread \"%s\" ", thread->get_thread_name());
 670       }
 671       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 672         JavaValue result(T_VOID);
 673         JavaCalls::call_virtual(&result,
 674                                 ex,
 675                                 SystemDictionary::Throwable_klass(),
 676                                 vmSymbols::printStackTrace_name(),
 677                                 vmSymbols::void_method_signature(),
 678                                 THREAD);
 679         // If an exception is thrown in the call it gets thrown away. Not much
 680         // we can do with it. The native code that calls this, does not check
 681         // for the exception - hence, it might still be in the thread when DestroyVM gets
 682         // called, potentially causing a few asserts to trigger - since no pending exception
 683         // is expected.
 684         CLEAR_PENDING_EXCEPTION;
 685       } else {
 686         ResourceMark rm(THREAD);
 687         jio_fprintf(defaultStream::error_stream(),
 688         ". Uncaught exception of type %s.",
 689         ex->klass()->external_name());
 690       }
 691     }
 692   }
 693 
 694   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 695 JNI_END
 696 
 697 
 698 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 699   JNIWrapper("ExceptionClear");
 700 
 701   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 702 
 703   // The jni code might be using this API to clear java thrown exception.
 704   // So just mark jvmti thread exception state as exception caught.
 705   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 706   if (state != NULL && state->is_exception_detected()) {
 707     state->set_exception_caught();
 708   }
 709   thread->clear_pending_exception();
 710 
 711   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 712 JNI_END
 713 
 714 
 715 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 716   JNIWrapper("FatalError");
 717 
 718   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 719 
 720   tty->print_cr("FATAL ERROR in native method: %s", msg);
 721   thread->print_stack();
 722   os::abort(); // Dump core and abort
 723 JNI_END
 724 
 725 
 726 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 727   JNIWrapper("PushLocalFrame");
 728 
 729   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 730 
 731   //%note jni_11
 732   if (capacity < 0 ||
 733       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 734     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 735     return JNI_ERR;
 736   }
 737   JNIHandleBlock* old_handles = thread->active_handles();
 738   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 739   assert(new_handles != NULL, "should not be NULL");
 740   new_handles->set_pop_frame_link(old_handles);
 741   thread->set_active_handles(new_handles);
 742   jint ret = JNI_OK;
 743   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 744   return ret;
 745 JNI_END
 746 
 747 
 748 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 749   JNIWrapper("PopLocalFrame");
 750 
 751   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 752 
 753   //%note jni_11
 754   Handle result_handle(thread, JNIHandles::resolve(result));
 755   JNIHandleBlock* old_handles = thread->active_handles();
 756   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 757   if (new_handles != NULL) {
 758     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 759     // This way code will still work if PopLocalFrame is called without a corresponding
 760     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 761     // the release_block call will release the blocks.
 762     thread->set_active_handles(new_handles);
 763     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 764     JNIHandleBlock::release_block(old_handles, thread); // may block
 765     result = JNIHandles::make_local(thread, result_handle());
 766   }
 767   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 768   return result;
 769 JNI_END
 770 
 771 
 772 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 773   JNIWrapper("NewGlobalRef");
 774 
 775   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 776 
 777   Handle ref_handle(thread, JNIHandles::resolve(ref));
 778   jobject ret = JNIHandles::make_global(ref_handle);
 779 
 780   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 781   return ret;
 782 JNI_END
 783 
 784 // Must be JNI_ENTRY (with HandleMark)
 785 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 786   JNIWrapper("DeleteGlobalRef");
 787 
 788   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 789 
 790   JNIHandles::destroy_global(ref);
 791 
 792   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 793 JNI_END
 794 
 795 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 796   JNIWrapper("DeleteLocalRef");
 797 
 798   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 799 
 800   JNIHandles::destroy_local(obj);
 801 
 802   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 803 JNI_END
 804 
 805 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 806   JNIWrapper("IsSameObject");
 807 
 808   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 809 
 810   jboolean ret = JNIHandles::is_same_object(r1, r2) ? JNI_TRUE : JNI_FALSE;
 811 
 812   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 813   return ret;
 814 JNI_END
 815 
 816 
 817 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 818   JNIWrapper("NewLocalRef");
 819 
 820   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 821 
 822   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 823 
 824   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 825   return ret;
 826 JNI_END
 827 
 828 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 829   JNIWrapper("EnsureLocalCapacity");
 830 
 831   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 832 
 833   jint ret;
 834   if (capacity >= 0 &&
 835       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 836     ret = JNI_OK;
 837   } else {
 838     ret = JNI_ERR;
 839   }
 840 
 841   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 842   return ret;
 843 JNI_END
 844 
 845 // Return the Handle Type
 846 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 847   JNIWrapper("GetObjectRefType");
 848 
 849   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 850 
 851   jobjectRefType ret = JNIInvalidRefType;
 852   if (obj != NULL) {
 853     ret = JNIHandles::handle_type(thread, obj);
 854   }
 855 
 856   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 857   return ret;
 858 JNI_END
 859 
 860 
 861 class JNI_ArgumentPusher : public SignatureIterator {
 862  protected:
 863   JavaCallArguments*  _arguments;
 864 
 865   virtual void get_bool   () = 0;
 866   virtual void get_char   () = 0;
 867   virtual void get_short  () = 0;
 868   virtual void get_byte   () = 0;
 869   virtual void get_int    () = 0;
 870   virtual void get_long   () = 0;
 871   virtual void get_float  () = 0;
 872   virtual void get_double () = 0;
 873   virtual void get_object () = 0;
 874 
 875   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 876     this->_return_type = T_ILLEGAL;
 877     _arguments = NULL;
 878   }
 879 
 880  public:
 881   virtual void iterate( uint64_t fingerprint ) = 0;
 882 
 883   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 884 
 885   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 886   inline void do_char()                     { if (!is_return_type()) get_char();   }
 887   inline void do_short()                    { if (!is_return_type()) get_short();  }
 888   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 889   inline void do_int()                      { if (!is_return_type()) get_int();    }
 890   inline void do_long()                     { if (!is_return_type()) get_long();   }
 891   inline void do_float()                    { if (!is_return_type()) get_float();  }
 892   inline void do_double()                   { if (!is_return_type()) get_double(); }
 893   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 894   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 895   inline void do_void()                     { }
 896 
 897   JavaCallArguments* arguments()     { return _arguments; }
 898   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 899 };
 900 
 901 
 902 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 903  protected:
 904   va_list _ap;
 905 
 906   inline void get_bool()   {
 907     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 908     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 909     // TemplateInterpreterGenerator::generate_result_handler_for and
 910     // SharedRuntime::generate_native_wrapper.
 911     jboolean b = va_arg(_ap, jint);
 912     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
 913   }
 914   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
 915   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
 916   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
 917   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }
 918 
 919   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 920 
 921   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }
 922   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
 923   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
 924   inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
 925 
 926   inline void set_ap(va_list rap) {
 927     va_copy(_ap, rap);
 928   }
 929 
 930  public:
 931   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 932        : JNI_ArgumentPusher(signature) {
 933     set_ap(rap);
 934   }
 935   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 936       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 937     set_ap(rap);
 938   }
 939 
 940   // Optimized path if we have the bitvector form of signature
 941   void iterate( uint64_t fingerprint ) {
 942     if (fingerprint == (uint64_t)CONST64(-1)) {
 943       SignatureIterator::iterate(); // Must be too many arguments
 944     } else {
 945       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 946                                   result_feature_mask);
 947 
 948       assert(fingerprint, "Fingerprint should not be 0");
 949       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 950       while ( 1 ) {
 951         switch ( fingerprint & parameter_feature_mask ) {
 952           case bool_parm:
 953             get_bool();
 954             break;
 955           case char_parm:
 956             get_char();
 957             break;
 958           case short_parm:
 959             get_short();
 960             break;
 961           case byte_parm:
 962             get_byte();
 963             break;
 964           case int_parm:
 965             get_int();
 966             break;
 967           case obj_parm:
 968             get_object();
 969             break;
 970           case long_parm:
 971             get_long();
 972             break;
 973           case float_parm:
 974             get_float();
 975             break;
 976           case double_parm:
 977             get_double();
 978             break;
 979           case done_parm:
 980             return;
 981             break;
 982           default:
 983             ShouldNotReachHere();
 984             break;
 985         }
 986         fingerprint >>= parameter_feature_size;
 987       }
 988     }
 989   }
 990 };
 991 
 992 
 993 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
 994  protected:
 995   const jvalue *_ap;
 996 
 997   inline void get_bool()   {
 998     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 999     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
1000     // TemplateInterpreterGenerator::generate_result_handler_for and
1001     // SharedRuntime::generate_native_wrapper.
1002     jboolean b = (_ap++)->z;
1003     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1004   }
1005   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1006   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1007   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1008   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1009 
1010   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1011   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1012   inline void get_double() { _arguments->push_double((_ap++)->d);}
1013   inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1014 
1015   inline void set_ap(const jvalue *rap) { _ap = rap; }
1016 
1017  public:
1018   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1019        : JNI_ArgumentPusher(signature) {
1020     set_ap(rap);
1021   }
1022   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1023       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1024     set_ap(rap);
1025   }
1026 
1027   // Optimized path if we have the bitvector form of signature
1028   void iterate( uint64_t fingerprint ) {
1029     if (fingerprint == (uint64_t)CONST64(-1)) {
1030       SignatureIterator::iterate(); // Must be too many arguments
1031     } else {
1032       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1033                                   result_feature_mask);
1034       assert(fingerprint, "Fingerprint should not be 0");
1035       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1036       while ( 1 ) {
1037         switch ( fingerprint & parameter_feature_mask ) {
1038           case bool_parm:
1039             get_bool();
1040             break;
1041           case char_parm:
1042             get_char();
1043             break;
1044           case short_parm:
1045             get_short();
1046             break;
1047           case byte_parm:
1048             get_byte();
1049             break;
1050           case int_parm:
1051             get_int();
1052             break;
1053           case obj_parm:
1054             get_object();
1055             break;
1056           case long_parm:
1057             get_long();
1058             break;
1059           case float_parm:
1060             get_float();
1061             break;
1062           case double_parm:
1063             get_double();
1064             break;
1065           case done_parm:
1066             return;
1067             break;
1068           default:
1069             ShouldNotReachHere();
1070             break;
1071         }
1072         fingerprint >>= parameter_feature_size;
1073       }
1074     }
1075   }
1076 };
1077 
1078 
1079 enum JNICallType {
1080   JNI_STATIC,
1081   JNI_VIRTUAL,
1082   JNI_NONVIRTUAL
1083 };
1084 
1085 
1086 
1087 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1088   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1089 
1090   // Create object to hold arguments for the JavaCall, and associate it with
1091   // the jni parser
1092   ResourceMark rm(THREAD);
1093   int number_of_parameters = method->size_of_parameters();
1094   JavaCallArguments java_args(number_of_parameters);
1095   args->set_java_argument_object(&java_args);
1096 
1097   assert(method->is_static(), "method should be static");
1098 
1099   // Fill out JavaCallArguments object
1100   args->iterate( Fingerprinter(method).fingerprint() );
1101   // Initialize result type
1102   result->set_type(args->get_ret_type());
1103 
1104   // Invoke the method. Result is returned as oop.
1105   JavaCalls::call(result, method, &java_args, CHECK);
1106 
1107   // Convert result
1108   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1109     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1110   }
1111 }
1112 
1113 
1114 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1115   oop recv = JNIHandles::resolve(receiver);
1116   if (recv == NULL) {
1117     THROW(vmSymbols::java_lang_NullPointerException());
1118   }
1119   Handle h_recv(THREAD, recv);
1120 
1121   int number_of_parameters;
1122   Method* selected_method;
1123   {
1124     Method* m = Method::resolve_jmethod_id(method_id);
1125     number_of_parameters = m->size_of_parameters();
1126     Klass* holder = m->method_holder();
1127     if (call_type != JNI_VIRTUAL) {
1128         selected_method = m;
1129     } else if (!m->has_itable_index()) {
1130       // non-interface call -- for that little speed boost, don't handlize
1131       debug_only(NoSafepointVerifier nosafepoint;)
1132       // jni_GetMethodID makes sure class is linked and initialized
1133       // so m should have a valid vtable index.
1134       assert(m->valid_vtable_index(), "no valid vtable index");
1135       int vtbl_index = m->vtable_index();
1136       if (vtbl_index != Method::nonvirtual_vtable_index) {
1137         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1138       } else {
1139         // final method
1140         selected_method = m;
1141       }
1142     } else {
1143       // interface call
1144       int itbl_index = m->itable_index();
1145       Klass* k = h_recv->klass();
1146       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1147     }
1148   }
1149 
1150   methodHandle method(THREAD, selected_method);
1151 
1152   // Create object to hold arguments for the JavaCall, and associate it with
1153   // the jni parser
1154   ResourceMark rm(THREAD);
1155   JavaCallArguments java_args(number_of_parameters);
1156   args->set_java_argument_object(&java_args);
1157 
1158   // handle arguments
1159   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1160   args->push_receiver(h_recv); // Push jobject handle
1161 
1162   // Fill out JavaCallArguments object
1163   args->iterate( Fingerprinter(method).fingerprint() );
1164   // Initialize result type
1165   result->set_type(args->get_ret_type());
1166 
1167   // Invoke the method. Result is returned as oop.
1168   JavaCalls::call(result, method, &java_args, CHECK);
1169 
1170   // Convert result
1171   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1172     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1173   }
1174 }
1175 
1176 
1177 static instanceOop alloc_object(jclass clazz, TRAPS) {
1178   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1179   if (k == NULL) {
1180     ResourceMark rm(THREAD);
1181     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1182   }
1183   k->check_valid_for_instantiation(false, CHECK_NULL);
1184   k->initialize(CHECK_NULL);
1185   instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1186   return ih;
1187 }
1188 
1189 DT_RETURN_MARK_DECL(AllocObject, jobject
1190                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1191 
1192 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1193   JNIWrapper("AllocObject");
1194 
1195   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1196 
1197   jobject ret = NULL;
1198   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1199 
1200   instanceOop i = alloc_object(clazz, CHECK_NULL);
1201   ret = JNIHandles::make_local(env, i);
1202   return ret;
1203 JNI_END
1204 
1205 DT_RETURN_MARK_DECL(NewObjectA, jobject
1206                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1207 
1208 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1209   JNIWrapper("NewObjectA");
1210 
1211   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1212 
1213   jobject obj = NULL;
1214   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1215 
1216   instanceOop i = alloc_object(clazz, CHECK_NULL);
1217   obj = JNIHandles::make_local(env, i);
1218   JavaValue jvalue(T_VOID);
1219   JNI_ArgumentPusherArray ap(methodID, args);
1220   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1221   return obj;
1222 JNI_END
1223 
1224 
1225 DT_RETURN_MARK_DECL(NewObjectV, jobject
1226                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1227 
1228 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1229   JNIWrapper("NewObjectV");
1230 
1231   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1232 
1233   jobject obj = NULL;
1234   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1235 
1236   instanceOop i = alloc_object(clazz, CHECK_NULL);
1237   obj = JNIHandles::make_local(env, i);
1238   JavaValue jvalue(T_VOID);
1239   JNI_ArgumentPusherVaArg ap(methodID, args);
1240   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1241   return obj;
1242 JNI_END
1243 
1244 
1245 DT_RETURN_MARK_DECL(NewObject, jobject
1246                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1247 
1248 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1249   JNIWrapper("NewObject");
1250 
1251   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1252 
1253   jobject obj = NULL;
1254   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1255 
1256   instanceOop i = alloc_object(clazz, CHECK_NULL);
1257   obj = JNIHandles::make_local(env, i);
1258   va_list args;
1259   va_start(args, methodID);
1260   JavaValue jvalue(T_VOID);
1261   JNI_ArgumentPusherVaArg ap(methodID, args);
1262   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1263   va_end(args);
1264   return obj;
1265 JNI_END
1266 
1267 
1268 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1269   JNIWrapper("GetObjectClass");
1270 
1271   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1272 
1273   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1274   jclass ret =
1275     (jclass) JNIHandles::make_local(env, k->java_mirror());
1276 
1277   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1278   return ret;
1279 JNI_END
1280 
1281 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1282   JNIWrapper("IsInstanceOf");
1283 
1284   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1285 
1286   jboolean ret = JNI_TRUE;
1287   if (obj != NULL) {
1288     ret = JNI_FALSE;
1289     Klass* k = java_lang_Class::as_Klass(
1290       JNIHandles::resolve_non_null(clazz));
1291     if (k != NULL) {
1292       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1293     }
1294   }
1295 
1296   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1297   return ret;
1298 JNI_END
1299 
1300 
1301 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1302                                const char *sig, bool is_static, TRAPS) {
1303   // %%%% This code should probably just call into a method in the LinkResolver
1304   //
1305   // The class should have been loaded (we have an instance of the class
1306   // passed in) so the method and signature should already be in the symbol
1307   // table.  If they're not there, the method doesn't exist.
1308   const char *name_to_probe = (name_str == NULL)
1309                         ? vmSymbols::object_initializer_name()->as_C_string()
1310                         : name_str;
1311   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1312   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1313 
1314   if (name == NULL || signature == NULL) {
1315     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1316   }
1317 
1318   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1319 
1320   // Throw a NoSuchMethodError exception if we have an instance of a
1321   // primitive java.lang.Class
1322   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1323     ResourceMark rm;
1324     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1325   }
1326 
1327   // Make sure class is linked and initialized before handing id's out to
1328   // Method*s.
1329   klass->initialize(CHECK_NULL);
1330 
1331   Method* m;
1332   if (name == vmSymbols::object_initializer_name() ||
1333       name == vmSymbols::class_initializer_name()) {
1334     // Never search superclasses for constructors
1335     if (klass->is_instance_klass()) {
1336       m = InstanceKlass::cast(klass)->find_method(name, signature);
1337     } else {
1338       m = NULL;
1339     }
1340   } else {
1341     m = klass->lookup_method(name, signature);
1342     if (m == NULL &&  klass->is_instance_klass()) {
1343       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1344     }
1345   }
1346   if (m == NULL || (m->is_static() != is_static)) {
1347     ResourceMark rm;
1348     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), err_msg("%s%s.%s%s", is_static ? "static " : "", klass->signature_name(), name_str, sig));
1349   }
1350   return m->jmethod_id();
1351 }
1352 
1353 
1354 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1355           const char *name, const char *sig))
1356   JNIWrapper("GetMethodID");
1357   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1358   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1359   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1360   return ret;
1361 JNI_END
1362 
1363 
1364 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1365           const char *name, const char *sig))
1366   JNIWrapper("GetStaticMethodID");
1367   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1368   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1369   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1370   return ret;
1371 JNI_END
1372 
1373 
1374 
1375 //
1376 // Calling Methods
1377 //
1378 
1379 
1380 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1381                           , EntryProbe, ReturnProbe)    \
1382 \
1383   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1384                           , ReturnProbe);                          \
1385 \
1386 JNI_ENTRY(ResultType, \
1387           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1388   JNIWrapper("Call" XSTR(Result) "Method"); \
1389 \
1390   EntryProbe; \
1391   ResultType ret = 0;\
1392   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1393                      (const ResultType&)ret);\
1394 \
1395   va_list args; \
1396   va_start(args, methodID); \
1397   JavaValue jvalue(Tag); \
1398   JNI_ArgumentPusherVaArg ap(methodID, args); \
1399   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1400   va_end(args); \
1401   ret = jvalue.get_##ResultType(); \
1402   return ret;\
1403 JNI_END
1404 
1405 // the runtime type of subword integral basic types is integer
1406 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1407                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1408                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1409 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1410                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1411                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1412 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1413                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1414                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1415 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1416                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1417                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1418 
1419 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1420                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1423                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1426                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1428 // Float and double probes don't return value because dtrace doesn't currently support it
1429 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1430                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1432 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1433                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1435 
1436 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1437                           , EntryProbe, ReturnProbe)    \
1438 \
1439   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1440                           , ReturnProbe);                          \
1441 \
1442 JNI_ENTRY(ResultType, \
1443           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1444   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1445 \
1446   EntryProbe;\
1447   ResultType ret = 0;\
1448   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1449                      (const ResultType&)ret);\
1450 \
1451   JavaValue jvalue(Tag); \
1452   JNI_ArgumentPusherVaArg ap(methodID, args); \
1453   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1454   ret = jvalue.get_##ResultType(); \
1455   return ret;\
1456 JNI_END
1457 
1458 // the runtime type of subword integral basic types is integer
1459 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1460                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1461                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1462 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1463                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1464                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1465 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1466                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1467                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1468 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1469                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1470                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1471 
1472 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1473                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1476                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1479                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1481 // Float and double probes don't return value because dtrace doesn't currently support it
1482 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1483                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1485 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1486                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1488 
1489 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1490                           , EntryProbe, ReturnProbe)    \
1491 \
1492   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1493                           , ReturnProbe);                          \
1494 \
1495 JNI_ENTRY(ResultType, \
1496           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1497   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1498   EntryProbe; \
1499   ResultType ret = 0;\
1500   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1501                      (const ResultType&)ret);\
1502 \
1503   JavaValue jvalue(Tag); \
1504   JNI_ArgumentPusherArray ap(methodID, args); \
1505   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1506   ret = jvalue.get_##ResultType(); \
1507   return ret;\
1508 JNI_END
1509 
1510 // the runtime type of subword integral basic types is integer
1511 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1512                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1513                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1514 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1515                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1516                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1517 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1518                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1519                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1520 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1521                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1522                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1523 
1524 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1525                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1528                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1531                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1533 // Float and double probes don't return value because dtrace doesn't currently support it
1534 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1535                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1537 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1538                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1540 
1541 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1542 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1543 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1544 
1545 
1546 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1547   JNIWrapper("CallVoidMethod");
1548   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1549   DT_VOID_RETURN_MARK(CallVoidMethod);
1550 
1551   va_list args;
1552   va_start(args, methodID);
1553   JavaValue jvalue(T_VOID);
1554   JNI_ArgumentPusherVaArg ap(methodID, args);
1555   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1556   va_end(args);
1557 JNI_END
1558 
1559 
1560 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1561   JNIWrapper("CallVoidMethodV");
1562   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1563   DT_VOID_RETURN_MARK(CallVoidMethodV);
1564 
1565   JavaValue jvalue(T_VOID);
1566   JNI_ArgumentPusherVaArg ap(methodID, args);
1567   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1568 JNI_END
1569 
1570 
1571 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1572   JNIWrapper("CallVoidMethodA");
1573   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1574   DT_VOID_RETURN_MARK(CallVoidMethodA);
1575 
1576   JavaValue jvalue(T_VOID);
1577   JNI_ArgumentPusherArray ap(methodID, args);
1578   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1579 JNI_END
1580 
1581 
1582 
1583 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1584                                     , EntryProbe, ReturnProbe)      \
1585 \
1586   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1587                           , ReturnProbe);\
1588 \
1589 JNI_ENTRY(ResultType, \
1590           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1591   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1592 \
1593   EntryProbe;\
1594   ResultType ret;\
1595   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1596                      (const ResultType&)ret);\
1597 \
1598   va_list args; \
1599   va_start(args, methodID); \
1600   JavaValue jvalue(Tag); \
1601   JNI_ArgumentPusherVaArg ap(methodID, args); \
1602   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1603   va_end(args); \
1604   ret = jvalue.get_##ResultType(); \
1605   return ret;\
1606 JNI_END
1607 
1608 // the runtime type of subword integral basic types is integer
1609 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1610                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1611                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1612 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1613                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1614                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1615 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1616                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1617                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1618 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1619                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1620                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1621 
1622 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1623                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1626                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1629                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 // Float and double probes don't return value because dtrace doesn't currently support it
1631                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1632 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1633                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1635 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1636                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1638 
1639 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1640                                     , EntryProbe, ReturnProbe)      \
1641 \
1642   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1643                           , ReturnProbe);\
1644 \
1645 JNI_ENTRY(ResultType, \
1646           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1647   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1648 \
1649   EntryProbe;\
1650   ResultType ret;\
1651   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1652                      (const ResultType&)ret);\
1653 \
1654   JavaValue jvalue(Tag); \
1655   JNI_ArgumentPusherVaArg ap(methodID, args); \
1656   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1657   ret = jvalue.get_##ResultType(); \
1658   return ret;\
1659 JNI_END
1660 
1661 // the runtime type of subword integral basic types is integer
1662 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1663                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1664                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1665 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1666                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1667                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1668 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1669                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1670                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1671 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1672                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1673                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1674 
1675 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1676                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1678 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1679                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1682                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 // Float and double probes don't return value because dtrace doesn't currently support it
1684                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1685 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1686                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1688 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1689                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1691 
1692 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1693                                     , EntryProbe, ReturnProbe)      \
1694 \
1695   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1696                           , ReturnProbe);\
1697 \
1698 JNI_ENTRY(ResultType, \
1699           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1700   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1701 \
1702   EntryProbe;\
1703   ResultType ret;\
1704   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1705                      (const ResultType&)ret);\
1706 \
1707   JavaValue jvalue(Tag); \
1708   JNI_ArgumentPusherArray ap(methodID, args); \
1709   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1710   ret = jvalue.get_##ResultType(); \
1711   return ret;\
1712 JNI_END
1713 
1714 // the runtime type of subword integral basic types is integer
1715 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1716                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1717                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1718 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1719                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1720                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1721 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1722                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1723                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1724 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1725                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1726                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1727 
1728 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1729                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1731 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1732                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1735                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 // Float and double probes don't return value because dtrace doesn't currently support it
1737                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1738 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1739                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1741 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1742                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1744 
1745 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1746                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1748                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1749 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1750                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1751 
1752 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1753   JNIWrapper("CallNonvirtualVoidMethod");
1754 
1755   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1756   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1757 
1758   va_list args;
1759   va_start(args, methodID);
1760   JavaValue jvalue(T_VOID);
1761   JNI_ArgumentPusherVaArg ap(methodID, args);
1762   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1763   va_end(args);
1764 JNI_END
1765 
1766 
1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1768   JNIWrapper("CallNonvirtualVoidMethodV");
1769 
1770   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1771                env, obj, cls, (uintptr_t) methodID);
1772   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1773 
1774   JavaValue jvalue(T_VOID);
1775   JNI_ArgumentPusherVaArg ap(methodID, args);
1776   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1777 JNI_END
1778 
1779 
1780 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1781   JNIWrapper("CallNonvirtualVoidMethodA");
1782   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1783                 env, obj, cls, (uintptr_t) methodID);
1784   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1785   JavaValue jvalue(T_VOID);
1786   JNI_ArgumentPusherArray ap(methodID, args);
1787   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1788 JNI_END
1789 
1790 
1791 
1792 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1793                                 , EntryProbe, ResultProbe) \
1794 \
1795   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1796                           , ResultProbe);                               \
1797 \
1798 JNI_ENTRY(ResultType, \
1799           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1800   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1801 \
1802   EntryProbe; \
1803   ResultType ret = 0;\
1804   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1805                      (const ResultType&)ret);\
1806 \
1807   va_list args; \
1808   va_start(args, methodID); \
1809   JavaValue jvalue(Tag); \
1810   JNI_ArgumentPusherVaArg ap(methodID, args); \
1811   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1812   va_end(args); \
1813   ret = jvalue.get_##ResultType(); \
1814   return ret;\
1815 JNI_END
1816 
1817 // the runtime type of subword integral basic types is integer
1818 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1819                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1820                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1821 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1822                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1823                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1824 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1825                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1826                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1827 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1828                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1829                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1830 
1831 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1832                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1835                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1838                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1840 // Float and double probes don't return value because dtrace doesn't currently support it
1841 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1842                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1844 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1845                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1847 
1848 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1849                                 , EntryProbe, ResultProbe) \
1850 \
1851   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1852                           , ResultProbe);                               \
1853 \
1854 JNI_ENTRY(ResultType, \
1855           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1856   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1857 \
1858   EntryProbe; \
1859   ResultType ret = 0;\
1860   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1861                      (const ResultType&)ret);\
1862 \
1863   JavaValue jvalue(Tag); \
1864   JNI_ArgumentPusherVaArg ap(methodID, args); \
1865   /* Make sure class is initialized before trying to invoke its method */ \
1866   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1867   k->initialize(CHECK_0); \
1868   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1869   va_end(args); \
1870   ret = jvalue.get_##ResultType(); \
1871   return ret;\
1872 JNI_END
1873 
1874 // the runtime type of subword integral basic types is integer
1875 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1876                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1877                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1878 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1879                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1880                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1881 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1882                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1883                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1884 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1885                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1886                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1887 
1888 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1889                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1891 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1892                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1895                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1897 // Float and double probes don't return value because dtrace doesn't currently support it
1898 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1899                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1901 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1902                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1904 
1905 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1906                                 , EntryProbe, ResultProbe) \
1907 \
1908   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1909                           , ResultProbe);                               \
1910 \
1911 JNI_ENTRY(ResultType, \
1912           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1913   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1914 \
1915   EntryProbe; \
1916   ResultType ret = 0;\
1917   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1918                      (const ResultType&)ret);\
1919 \
1920   JavaValue jvalue(Tag); \
1921   JNI_ArgumentPusherArray ap(methodID, args); \
1922   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1923   ret = jvalue.get_##ResultType(); \
1924   return ret;\
1925 JNI_END
1926 
1927 // the runtime type of subword integral basic types is integer
1928 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1929                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1930                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1931 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1932                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1933                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1934 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1935                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1936                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1937 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1938                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1939                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1940 
1941 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1942                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1944 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1945                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1948                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1950 // Float and double probes don't return value because dtrace doesn't currently support it
1951 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1952                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1954 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1955                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1957 
1958 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1959                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1961                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1962 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1963                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1964 
1965 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1966   JNIWrapper("CallStaticVoidMethod");
1967   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1968   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1969 
1970   va_list args;
1971   va_start(args, methodID);
1972   JavaValue jvalue(T_VOID);
1973   JNI_ArgumentPusherVaArg ap(methodID, args);
1974   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1975   va_end(args);
1976 JNI_END
1977 
1978 
1979 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1980   JNIWrapper("CallStaticVoidMethodV");
1981   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1982   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1983 
1984   JavaValue jvalue(T_VOID);
1985   JNI_ArgumentPusherVaArg ap(methodID, args);
1986   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1987 JNI_END
1988 
1989 
1990 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1991   JNIWrapper("CallStaticVoidMethodA");
1992   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1993   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1994 
1995   JavaValue jvalue(T_VOID);
1996   JNI_ArgumentPusherArray ap(methodID, args);
1997   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1998 JNI_END
1999 
2000 
2001 //
2002 // Accessing Fields
2003 //
2004 
2005 
2006 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2007                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2008 
2009 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2010           const char *name, const char *sig))
2011   JNIWrapper("GetFieldID");
2012   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2013   jfieldID ret = 0;
2014   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2015 
2016   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2017 
2018   // The class should have been loaded (we have an instance of the class
2019   // passed in) so the field and signature should already be in the symbol
2020   // table.  If they're not there, the field doesn't exist.
2021   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2022   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2023   if (fieldname == NULL || signame == NULL) {
2024     ResourceMark rm;
2025     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2026   }
2027 
2028   // Make sure class is initialized before handing id's out to fields
2029   k->initialize(CHECK_NULL);
2030 
2031   fieldDescriptor fd;
2032   if (!k->is_instance_klass() ||
2033       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2034     ResourceMark rm;
2035     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), err_msg("%s.%s %s", k->external_name(), name, sig));
2036   }
2037 
2038   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2039   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2040   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2041   return ret;
2042 JNI_END
2043 
2044 
2045 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2046   JNIWrapper("GetObjectField");
2047   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2048   oop o = JNIHandles::resolve_non_null(obj);
2049   Klass* k = o->klass();
2050   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2051   // Keep JVMTI addition small and only check enabled flag here.
2052   // jni_GetField_probe() assumes that is okay to create handles.
2053   if (JvmtiExport::should_post_field_access()) {
2054     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2055   }
2056   oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2057   jobject ret = JNIHandles::make_local(env, loaded_obj);
2058   HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2059   return ret;
2060 JNI_END
2061 
2062 
2063 
2064 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2065   , EntryProbe, ReturnProbe) \
2066 \
2067   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2068   , ReturnProbe); \
2069 \
2070 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2071   JNIWrapper("Get" XSTR(Result) "Field"); \
2072 \
2073   EntryProbe; \
2074   Return ret = 0;\
2075   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2076 \
2077   oop o = JNIHandles::resolve_non_null(obj); \
2078   Klass* k = o->klass(); \
2079   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2080   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2081   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2082   /* and creates a ResetNoHandleMark.                                   */ \
2083   if (JvmtiExport::should_post_field_access()) { \
2084     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2085   } \
2086   ret = o->Fieldname##_field(offset); \
2087   return ret; \
2088 JNI_END
2089 
2090 DEFINE_GETFIELD(jboolean, bool,   Boolean
2091                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2092                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2093 DEFINE_GETFIELD(jbyte,    byte,   Byte
2094                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2095                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2096 DEFINE_GETFIELD(jchar,    char,   Char
2097                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2098                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2099 DEFINE_GETFIELD(jshort,   short,  Short
2100                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2101                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2102 DEFINE_GETFIELD(jint,     int,    Int
2103                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2104                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2105 DEFINE_GETFIELD(jlong,    long,   Long
2106                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2107                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2108 // Float and double probes don't return value because dtrace doesn't currently support it
2109 DEFINE_GETFIELD(jfloat,   float,  Float
2110                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2112 DEFINE_GETFIELD(jdouble,  double, Double
2113                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2115 
2116 address jni_GetBooleanField_addr() {
2117   return (address)jni_GetBooleanField;
2118 }
2119 address jni_GetByteField_addr() {
2120   return (address)jni_GetByteField;
2121 }
2122 address jni_GetCharField_addr() {
2123   return (address)jni_GetCharField;
2124 }
2125 address jni_GetShortField_addr() {
2126   return (address)jni_GetShortField;
2127 }
2128 address jni_GetIntField_addr() {
2129   return (address)jni_GetIntField;
2130 }
2131 address jni_GetLongField_addr() {
2132   return (address)jni_GetLongField;
2133 }
2134 address jni_GetFloatField_addr() {
2135   return (address)jni_GetFloatField;
2136 }
2137 address jni_GetDoubleField_addr() {
2138   return (address)jni_GetDoubleField;
2139 }
2140 
2141 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2142   JNIWrapper("SetObjectField");
2143   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2144   oop o = JNIHandles::resolve_non_null(obj);
2145   Klass* k = o->klass();
2146   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2147   // Keep JVMTI addition small and only check enabled flag here.
2148   // jni_SetField_probe_nh() assumes that is not okay to create handles
2149   // and creates a ResetNoHandleMark.
2150   if (JvmtiExport::should_post_field_modification()) {
2151     jvalue field_value;
2152     field_value.l = value;
2153     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2154   }
2155   HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2156   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2157 JNI_END
2158 
2159 
2160 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2161                         , EntryProbe, ReturnProbe) \
2162 \
2163 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2164   JNIWrapper("Set" XSTR(Result) "Field"); \
2165 \
2166   EntryProbe; \
2167 \
2168   oop o = JNIHandles::resolve_non_null(obj); \
2169   Klass* k = o->klass(); \
2170   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2171   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2172   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2173   /* and creates a ResetNoHandleMark.                                   */ \
2174   if (JvmtiExport::should_post_field_modification()) { \
2175     jvalue field_value; \
2176     field_value.unionType = value; \
2177     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2178   } \
2179   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2180   o->Fieldname##_field_put(offset, value); \
2181   ReturnProbe; \
2182 JNI_END
2183 
2184 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2185                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2186                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2187 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2188                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2189                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2190 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2191                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2192                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2193 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2194                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2195                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2196 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2197                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2198                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2199 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2200                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2201                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2202 // Float and double probes don't return value because dtrace doesn't currently support it
2203 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2204                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2205                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2206 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2207                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2208                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2209 
2210 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2211                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2212 
2213 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2214   JNIWrapper("ToReflectedField");
2215   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2216   jobject ret = NULL;
2217   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2218 
2219   fieldDescriptor fd;
2220   bool found = false;
2221   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2222 
2223   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2224 
2225   if (isStatic) {
2226     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2227     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2228     assert(id->is_static_field_id(), "invalid static field id");
2229     found = id->find_local_field(&fd);
2230   } else {
2231     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2232     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2233     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2234   }
2235   assert(found, "bad fieldID passed into jni_ToReflectedField");
2236   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2237   ret = JNIHandles::make_local(env, reflected);
2238   return ret;
2239 JNI_END
2240 
2241 
2242 //
2243 // Accessing Static Fields
2244 //
2245 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2246                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2247 
2248 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2249           const char *name, const char *sig))
2250   JNIWrapper("GetStaticFieldID");
2251   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2252   jfieldID ret = NULL;
2253   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2254 
2255   // The class should have been loaded (we have an instance of the class
2256   // passed in) so the field and signature should already be in the symbol
2257   // table.  If they're not there, the field doesn't exist.
2258   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2259   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2260   if (fieldname == NULL || signame == NULL) {
2261     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2262   }
2263   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2264   // Make sure class is initialized before handing id's out to static fields
2265   k->initialize(CHECK_NULL);
2266 
2267   fieldDescriptor fd;
2268   if (!k->is_instance_klass() ||
2269       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2270     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2271   }
2272 
2273   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2274   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2275   debug_only(id->set_is_static_field_id();)
2276 
2277   debug_only(id->verify(fd.field_holder()));
2278 
2279   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2280   return ret;
2281 JNI_END
2282 
2283 
2284 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2285   JNIWrapper("GetStaticObjectField");
2286   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2287 #if INCLUDE_JNI_CHECK
2288   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2289 #endif // INCLUDE_JNI_CHECK
2290   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2291   assert(id->is_static_field_id(), "invalid static field id");
2292   // Keep JVMTI addition small and only check enabled flag here.
2293   // jni_GetField_probe() assumes that is okay to create handles.
2294   if (JvmtiExport::should_post_field_access()) {
2295     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2296   }
2297   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2298   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2299   return ret;
2300 JNI_END
2301 
2302 
2303 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2304                               , EntryProbe, ReturnProbe) \
2305 \
2306   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2307                           , ReturnProbe);                                          \
2308 \
2309 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2310   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2311   EntryProbe; \
2312   Return ret = 0;\
2313   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2314                      (const Return&)ret);\
2315   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2316   assert(id->is_static_field_id(), "invalid static field id"); \
2317   /* Keep JVMTI addition small and only check enabled flag here. */ \
2318   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2319   if (JvmtiExport::should_post_field_access()) { \
2320     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2321   } \
2322   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2323   return ret;\
2324 JNI_END
2325 
2326 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2327                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2328 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2329                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2330 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2331                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2332 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2333                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2334 DEFINE_GETSTATICFIELD(jint,     int,    Int
2335                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2336 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2337                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2338 // Float and double probes don't return value because dtrace doesn't currently support it
2339 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2340                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2341 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2342                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2343 
2344 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2345   JNIWrapper("SetStaticObjectField");
2346  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2347   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2348   assert(id->is_static_field_id(), "invalid static field id");
2349   // Keep JVMTI addition small and only check enabled flag here.
2350   // jni_SetField_probe() assumes that is okay to create handles.
2351   if (JvmtiExport::should_post_field_modification()) {
2352     jvalue field_value;
2353     field_value.l = value;
2354     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2355   }
2356   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2357   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2358 JNI_END
2359 
2360 
2361 
2362 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2363                               , EntryProbe, ReturnProbe) \
2364 \
2365 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2366   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2367   EntryProbe; \
2368 \
2369   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2370   assert(id->is_static_field_id(), "invalid static field id"); \
2371   /* Keep JVMTI addition small and only check enabled flag here. */ \
2372   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2373   if (JvmtiExport::should_post_field_modification()) { \
2374     jvalue field_value; \
2375     field_value.unionType = value; \
2376     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2377   } \
2378   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2379   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2380   ReturnProbe;\
2381 JNI_END
2382 
2383 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2384                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2385                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2386 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2387                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2388                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2389 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2390                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2391                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2392 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2393                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2394                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2395 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2396                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2397                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2398 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2399                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2400                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2401 // Float and double probes don't return value because dtrace doesn't currently support it
2402 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2403                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2404                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2406                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2407                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2408 
2409 //
2410 // String Operations
2411 //
2412 
2413 // Unicode Interface
2414 
2415 DT_RETURN_MARK_DECL(NewString, jstring
2416                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2417 
2418 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2419   JNIWrapper("NewString");
2420  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2421   jstring ret = NULL;
2422   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2423   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2424   ret = (jstring) JNIHandles::make_local(env, string);
2425   return ret;
2426 JNI_END
2427 
2428 
2429 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2430   JNIWrapper("GetStringLength");
2431   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2432   jsize ret = 0;
2433   oop s = JNIHandles::resolve_non_null(string);
2434   ret = java_lang_String::length(s);
2435  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2436   return ret;
2437 JNI_END
2438 
2439 
2440 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2441   JNIEnv *env, jstring string, jboolean *isCopy))
2442   JNIWrapper("GetStringChars");
2443  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2444   jchar* buf = NULL;
2445   oop s = JNIHandles::resolve_non_null(string);
2446   typeArrayOop s_value = java_lang_String::value(s);
2447   if (s_value != NULL) {
2448     int s_len = java_lang_String::length(s, s_value);
2449     bool is_latin1 = java_lang_String::is_latin1(s);
2450     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2451     /* JNI Specification states return NULL on OOM */
2452     if (buf != NULL) {
2453       if (s_len > 0) {
2454         if (!is_latin1) {
2455           ArrayAccess<>::arraycopy_to_native(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2456                                              buf, s_len);
2457         } else {
2458           for (int i = 0; i < s_len; i++) {
2459             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2460           }
2461         }
2462       }
2463       buf[s_len] = 0;
2464       //%note jni_5
2465       if (isCopy != NULL) {
2466         *isCopy = JNI_TRUE;
2467       }
2468     }
2469   }
2470   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2471   return buf;
2472 JNI_END
2473 
2474 
2475 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2476   JNIWrapper("ReleaseStringChars");
2477   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2478   //%note jni_6
2479   if (chars != NULL) {
2480     // Since String objects are supposed to be immutable, don't copy any
2481     // new data back.  A bad user will have to go after the char array.
2482     FreeHeap((void*) chars);
2483   }
2484   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2485 JNI_END
2486 
2487 
2488 // UTF Interface
2489 
2490 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2491                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2492 
2493 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2494   JNIWrapper("NewStringUTF");
2495   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2496   jstring ret;
2497   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2498 
2499   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2500   ret = (jstring) JNIHandles::make_local(env, result);
2501   return ret;
2502 JNI_END
2503 
2504 
2505 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2506   JNIWrapper("GetStringUTFLength");
2507  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2508   oop java_string = JNIHandles::resolve_non_null(string);
2509   jsize ret = java_lang_String::utf8_length(java_string);
2510   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2511   return ret;
2512 JNI_END
2513 
2514 
2515 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2516   JNIWrapper("GetStringUTFChars");
2517  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2518   char* result = NULL;
2519   oop java_string = JNIHandles::resolve_non_null(string);
2520   typeArrayOop s_value = java_lang_String::value(java_string);
2521   if (s_value != NULL) {
2522     size_t length = java_lang_String::utf8_length(java_string, s_value);
2523     /* JNI Specification states return NULL on OOM */
2524     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2525     if (result != NULL) {
2526       java_lang_String::as_utf8_string(java_string, s_value, result, (int) length + 1);
2527       if (isCopy != NULL) {
2528         *isCopy = JNI_TRUE;
2529       }
2530     }
2531   }
2532  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2533   return result;
2534 JNI_END
2535 
2536 
2537 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2538   JNIWrapper("ReleaseStringUTFChars");
2539  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2540   if (chars != NULL) {
2541     FreeHeap((char*) chars);
2542   }
2543 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2544 JNI_END
2545 
2546 
2547 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2548   JNIWrapper("GetArrayLength");
2549  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2550   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2551   assert(a->is_array(), "must be array");
2552   jsize ret = a->length();
2553  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2554   return ret;
2555 JNI_END
2556 
2557 
2558 //
2559 // Object Array Operations
2560 //
2561 
2562 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2563                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2564 
2565 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2566   JNIWrapper("NewObjectArray");
2567  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2568   jobjectArray ret = NULL;
2569   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2570   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2571   Klass* ak = ek->array_klass(CHECK_NULL);
2572   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2573   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2574   oop initial_value = JNIHandles::resolve(initialElement);
2575   if (initial_value != NULL) {  // array already initialized with NULL
2576     for (int index = 0; index < length; index++) {
2577       result->obj_at_put(index, initial_value);
2578     }
2579   }
2580   ret = (jobjectArray) JNIHandles::make_local(env, result);
2581   return ret;
2582 JNI_END
2583 
2584 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2585                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2586 
2587 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2588   JNIWrapper("GetObjectArrayElement");
2589  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2590   jobject ret = NULL;
2591   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2592   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2593   if (a->is_within_bounds(index)) {
2594     ret = JNIHandles::make_local(env, a->obj_at(index));
2595     return ret;
2596   } else {
2597     ResourceMark rm(THREAD);
2598     stringStream ss;
2599     ss.print("Index %d out of bounds for length %d", index, a->length());
2600     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2601   }
2602 JNI_END
2603 
2604 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2605                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2606 
2607 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2608   JNIWrapper("SetObjectArrayElement");
2609  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2610   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2611 
2612   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2613   oop v = JNIHandles::resolve(value);
2614   if (a->is_within_bounds(index)) {
2615     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2616       a->obj_at_put(index, v);
2617     } else {
2618       ResourceMark rm(THREAD);
2619       stringStream ss;
2620       Klass *bottom_kl = ObjArrayKlass::cast(a->klass())->bottom_klass();
2621       ss.print("type mismatch: can not store %s to %s[%d]",
2622                v->klass()->external_name(),
2623                bottom_kl->is_typeArray_klass() ? type2name_tab[ArrayKlass::cast(bottom_kl)->element_type()] : bottom_kl->external_name(),
2624                index);
2625       for (int dims = ArrayKlass::cast(a->klass())->dimension(); dims > 1; --dims) {
2626         ss.print("[]");
2627       }
2628       THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
2629     }
2630   } else {
2631     ResourceMark rm(THREAD);
2632     stringStream ss;
2633     ss.print("Index %d out of bounds for length %d", index, a->length());
2634     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2635   }
2636 JNI_END
2637 
2638 
2639 
2640 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2641                               ,EntryProbe,ReturnProbe)  \
2642 \
2643   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2644                       , ReturnProbe); \
2645 \
2646 JNI_ENTRY(Return, \
2647           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2648   JNIWrapper("New" XSTR(Result) "Array"); \
2649   EntryProbe; \
2650   Return ret = NULL;\
2651   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2652 \
2653   oop obj= oopFactory::Allocator(len, CHECK_0); \
2654   ret = (Return) JNIHandles::make_local(env, obj); \
2655   return ret;\
2656 JNI_END
2657 
2658 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2659                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2660                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2661 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2662                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2663                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2664 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2665                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2666                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2667 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2668                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2669                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2670 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2671                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2672                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2674                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2675                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jfloatArray,   new_floatArray,  Float,
2677                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2678                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2680                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2681                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2682 
2683 // Return an address which will fault if the caller writes to it.
2684 
2685 static char* get_bad_address() {
2686   static char* bad_address = NULL;
2687   if (bad_address == NULL) {
2688     size_t size = os::vm_allocation_granularity();
2689     bad_address = os::reserve_memory(size);
2690     if (bad_address != NULL) {
2691       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2692                          /*is_committed*/false);
2693       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2694     }
2695   }
2696   return bad_address;
2697 }
2698 
2699 
2700 
2701 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2702                                       , EntryProbe, ReturnProbe) \
2703 \
2704 JNI_QUICK_ENTRY(ElementType*, \
2705           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2706   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2707   EntryProbe; \
2708   /* allocate an chunk of memory in c land */ \
2709   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2710   ElementType* result; \
2711   int len = a->length(); \
2712   if (len == 0) { \
2713     if (isCopy != NULL) { \
2714       *isCopy = JNI_FALSE; \
2715     } \
2716     /* Empty array: legal but useless, can't return NULL. \
2717      * Return a pointer to something useless. \
2718      * Avoid asserts in typeArrayOop. */ \
2719     result = (ElementType*)get_bad_address(); \
2720   } else { \
2721     /* JNI Specification states return NULL on OOM */                    \
2722     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2723     if (result != NULL) {                                                \
2724       /* copy the array to the c chunk */                                \
2725       ArrayAccess<>::arraycopy_to_native(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2726                                          result, len);                   \
2727       if (isCopy) {                                                      \
2728         *isCopy = JNI_TRUE;                                              \
2729       }                                                                  \
2730     }                                                                    \
2731   } \
2732   ReturnProbe; \
2733   return result; \
2734 JNI_END
2735 
2736 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2737                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2738                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2739 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2740                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2741                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2742 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2743                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2744                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2745 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2746                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2747                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2748 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2749                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2750                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2751 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2752                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2753                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2754 // Float and double probes don't return value because dtrace doesn't currently support it
2755 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2756                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2757                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2758 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2759                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2760                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2761 
2762 
2763 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2764                                           , EntryProbe, ReturnProbe);\
2765 \
2766 JNI_QUICK_ENTRY(void, \
2767           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2768                                              ElementType *buf, jint mode)) \
2769   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2770   EntryProbe; \
2771   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2772   int len = a->length(); \
2773   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2774     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2775       ArrayAccess<>::arraycopy_from_native(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2776     } \
2777     if ((mode == 0) || (mode == JNI_ABORT)) { \
2778       FreeHeap(buf); \
2779     } \
2780   } \
2781   ReturnProbe; \
2782 JNI_END
2783 
2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2785                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2786                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2788                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2789                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2791                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2792                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2794                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2795                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2797                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2798                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2800                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2801                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2803                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2804                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2806                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2807                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2808 
2809 static void check_bounds(jsize start, jsize copy_len, jsize array_len, TRAPS) {
2810   ResourceMark rm(THREAD);
2811   if (copy_len < 0) {
2812     stringStream ss;
2813     ss.print("Length %d is negative", copy_len);
2814     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2815   } else if (start < 0 || (start > array_len - copy_len)) {
2816     stringStream ss;
2817     ss.print("Array region %d.." INT64_FORMAT " out of bounds for length %d",
2818              start, (int64_t)start+(int64_t)copy_len, array_len);
2819     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
2820   }
2821 }
2822 
2823 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2824                                     , EntryProbe, ReturnProbe); \
2825   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2826                            , ReturnProbe); \
2827 \
2828 JNI_ENTRY(void, \
2829 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2830              jsize len, ElementType *buf)) \
2831   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2832   EntryProbe; \
2833   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2834   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2835   check_bounds(start, len, src->length(), CHECK); \
2836   if (len > 0) {    \
2837     ArrayAccess<>::arraycopy_to_native(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2838   } \
2839 JNI_END
2840 
2841 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2842                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2843                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2845                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2846                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2848                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2849                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2851                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2852                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2854                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2855                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2856 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2857                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2858                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2859 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2860                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2861                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2862 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2863                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2864                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2865 
2866 
2867 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2868                                     , EntryProbe, ReturnProbe); \
2869   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2870                            ,ReturnProbe);           \
2871 \
2872 JNI_ENTRY(void, \
2873 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2874              jsize len, const ElementType *buf)) \
2875   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2876   EntryProbe; \
2877   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2878   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2879   check_bounds(start, len, dst->length(), CHECK); \
2880   if (len > 0) { \
2881     ArrayAccess<>::arraycopy_from_native(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2882   } \
2883 JNI_END
2884 
2885 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2886                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2887                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2889                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2890                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2892                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2895                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2896                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2898                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2899                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2901                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2902                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2904                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2905                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2906 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2907                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2908                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2909 
2910 
2911 //
2912 // Interception of natives
2913 //
2914 
2915 // The RegisterNatives call being attempted tried to register with a method that
2916 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2917 // to see if the native method is now wrapped with the prefixes.  See the
2918 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2919 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2920 #if INCLUDE_JVMTI
2921   ResourceMark rm(THREAD);
2922   Method* method;
2923   int name_len = name->utf8_length();
2924   char* name_str = name->as_utf8();
2925   int prefix_count;
2926   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2927   for (int i = 0; i < prefix_count; i++) {
2928     char* prefix = prefixes[i];
2929     int prefix_len = (int)strlen(prefix);
2930 
2931     // try adding this prefix to the method name and see if it matches another method name
2932     int trial_len = name_len + prefix_len;
2933     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2934     strcpy(trial_name_str, prefix);
2935     strcat(trial_name_str, name_str);
2936     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2937     if (trial_name == NULL) {
2938       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2939     }
2940     method = k->lookup_method(trial_name, signature);
2941     if (method == NULL) {
2942       continue; // signature doesn't match, try the next prefix
2943     }
2944     if (method->is_native()) {
2945       method->set_is_prefixed_native();
2946       return method; // wahoo, we found a prefixed version of the method, return it
2947     }
2948     // found as non-native, so prefix is good, add it, probably just need more prefixes
2949     name_len = trial_len;
2950     name_str = trial_name_str;
2951   }
2952 #endif // INCLUDE_JVMTI
2953   return NULL; // not found
2954 }
2955 
2956 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2957   Method* method = k->lookup_method(name, signature);
2958   if (method == NULL) {
2959     ResourceMark rm;
2960     stringStream st;
2961     st.print("Method '");
2962     Method::print_external_name(&st, k, name, signature);
2963     st.print("' name or signature does not match");
2964     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2965   }
2966   if (!method->is_native()) {
2967     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2968     method = find_prefixed_native(k, name, signature, THREAD);
2969     if (method == NULL) {
2970       ResourceMark rm;
2971       stringStream st;
2972       st.print("Method '");
2973       Method::print_external_name(&st, k, name, signature);
2974       st.print("' is not declared as native");
2975       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2976     }
2977   }
2978 
2979   if (entry != NULL) {
2980     method->set_native_function(entry,
2981       Method::native_bind_event_is_interesting);
2982   } else {
2983     method->clear_native_function();
2984   }
2985   if (PrintJNIResolving) {
2986     ResourceMark rm(THREAD);
2987     tty->print_cr("[Registering JNI native method %s.%s]",
2988       method->method_holder()->external_name(),
2989       method->name()->as_C_string());
2990   }
2991   return true;
2992 }
2993 
2994 DT_RETURN_MARK_DECL(RegisterNatives, jint
2995                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2996 
2997 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2998                                     const JNINativeMethod *methods,
2999                                     jint nMethods))
3000   JNIWrapper("RegisterNatives");
3001   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3002   jint ret = 0;
3003   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3004 
3005   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3006 
3007   for (int index = 0; index < nMethods; index++) {
3008     const char* meth_name = methods[index].name;
3009     const char* meth_sig = methods[index].signature;
3010     int meth_name_len = (int)strlen(meth_name);
3011 
3012     // The class should have been loaded (we have an instance of the class
3013     // passed in) so the method and signature should already be in the symbol
3014     // table.  If they're not there, the method doesn't exist.
3015     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3016     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3017 
3018     if (name == NULL || signature == NULL) {
3019       ResourceMark rm;
3020       stringStream st;
3021       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3022       // Must return negative value on failure
3023       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3024     }
3025 
3026     bool res = register_native(k, name, signature,
3027                                (address) methods[index].fnPtr, THREAD);
3028     if (!res) {
3029       ret = -1;
3030       break;
3031     }
3032   }
3033   return ret;
3034 JNI_END
3035 
3036 
3037 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3038   JNIWrapper("UnregisterNatives");
3039  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3040   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3041   //%note jni_2
3042   if (k->is_instance_klass()) {
3043     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3044       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3045       if (m->is_native()) {
3046         m->clear_native_function();
3047         m->set_signature_handler(NULL);
3048       }
3049     }
3050   }
3051  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3052   return 0;
3053 JNI_END
3054 
3055 //
3056 // Monitor functions
3057 //
3058 
3059 DT_RETURN_MARK_DECL(MonitorEnter, jint
3060                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3061 
3062 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3063  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3064   jint ret = JNI_ERR;
3065   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3066 
3067   // If the object is null, we can't do anything with it
3068   if (jobj == NULL) {
3069     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3070   }
3071 
3072   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3073   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3074   ret = JNI_OK;
3075   return ret;
3076 JNI_END
3077 
3078 DT_RETURN_MARK_DECL(MonitorExit, jint
3079                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3080 
3081 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3082  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3083   jint ret = JNI_ERR;
3084   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3085 
3086   // Don't do anything with a null object
3087   if (jobj == NULL) {
3088     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3089   }
3090 
3091   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3092   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3093 
3094   ret = JNI_OK;
3095   return ret;
3096 JNI_END
3097 
3098 //
3099 // Extensions
3100 //
3101 
3102 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3103                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3104 
3105 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3106   JNIWrapper("GetStringRegion");
3107  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3108   DT_VOID_RETURN_MARK(GetStringRegion);
3109   oop s = JNIHandles::resolve_non_null(string);
3110   typeArrayOop s_value = java_lang_String::value(s);
3111   int s_len = java_lang_String::length(s, s_value);
3112   if (start < 0 || len < 0 || start > s_len - len) {
3113     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3114   } else {
3115     if (len > 0) {
3116       bool is_latin1 = java_lang_String::is_latin1(s);
3117       if (!is_latin1) {
3118         ArrayAccess<>::arraycopy_to_native(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3119                                            buf, len);
3120       } else {
3121         for (int i = 0; i < len; i++) {
3122           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3123         }
3124       }
3125     }
3126   }
3127 JNI_END
3128 
3129 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3130                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3131 
3132 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3133   JNIWrapper("GetStringUTFRegion");
3134  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3135   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3136   oop s = JNIHandles::resolve_non_null(string);
3137   typeArrayOop s_value = java_lang_String::value(s);
3138   int s_len = java_lang_String::length(s, s_value);
3139   if (start < 0 || len < 0 || start > s_len - len) {
3140     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3141   } else {
3142     //%note jni_7
3143     if (len > 0) {
3144       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3145       java_lang_String::as_utf8_string(s, s_value, start, len, buf, INT_MAX);
3146       // as_utf8_string null-terminates the result string
3147     } else {
3148       // JDK null-terminates the buffer even in len is zero
3149       if (buf != NULL) {
3150         buf[0] = 0;
3151       }
3152     }
3153   }
3154 JNI_END
3155 
3156 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3157   if (Universe::heap()->supports_object_pinning()) {
3158     const oop o = JNIHandles::resolve_non_null(obj);
3159     return Universe::heap()->pin_object(thread, o);
3160   } else {
3161     GCLocker::lock_critical(thread);
3162     return JNIHandles::resolve_non_null(obj);
3163   }
3164 }
3165 
3166 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3167   if (Universe::heap()->supports_object_pinning()) {
3168     const oop o = JNIHandles::resolve_non_null(obj);
3169     return Universe::heap()->unpin_object(thread, o);
3170   } else {
3171     GCLocker::unlock_critical(thread);
3172   }
3173 }
3174 
3175 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3176   JNIWrapper("GetPrimitiveArrayCritical");
3177  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3178   if (isCopy != NULL) {
3179     *isCopy = JNI_FALSE;
3180   }
3181   oop a = lock_gc_or_pin_object(thread, array);
3182   assert(a->is_array(), "just checking");
3183   BasicType type;
3184   if (a->is_objArray()) {
3185     type = T_OBJECT;
3186   } else {
3187     type = TypeArrayKlass::cast(a->klass())->element_type();
3188   }
3189   void* ret = arrayOop(a)->base(type);
3190  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3191   return ret;
3192 JNI_END
3193 
3194 
3195 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3196   JNIWrapper("ReleasePrimitiveArrayCritical");
3197   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3198   unlock_gc_or_unpin_object(thread, array);
3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3200 JNI_END
3201 
3202 
3203 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3204   JNIWrapper("GetStringCritical");
3205   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3206   oop s = lock_gc_or_pin_object(thread, string);
3207   typeArrayOop s_value = java_lang_String::value(s);
3208   bool is_latin1 = java_lang_String::is_latin1(s);
3209   if (isCopy != NULL) {
3210     *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3211   }
3212   jchar* ret;
3213   if (!is_latin1) {
3214     ret = (jchar*) s_value->base(T_CHAR);
3215   } else {
3216     // Inflate latin1 encoded string to UTF16
3217     int s_len = java_lang_String::length(s, s_value);
3218     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
3219     /* JNI Specification states return NULL on OOM */
3220     if (ret != NULL) {
3221       for (int i = 0; i < s_len; i++) {
3222         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3223       }
3224       ret[s_len] = 0;
3225     }
3226   }
3227  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3228   return ret;
3229 JNI_END
3230 
3231 
3232 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3233   JNIWrapper("ReleaseStringCritical");
3234   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3235   // The str and chars arguments are ignored for UTF16 strings
3236   oop s = JNIHandles::resolve_non_null(str);
3237   bool is_latin1 = java_lang_String::is_latin1(s);
3238   if (is_latin1) {
3239     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3240     // This assumes that ReleaseStringCritical bookends GetStringCritical.
3241     FREE_C_HEAP_ARRAY(jchar, chars);
3242   }
3243   unlock_gc_or_unpin_object(thread, str);
3244 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3245 JNI_END
3246 
3247 
3248 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3249   JNIWrapper("jni_NewWeakGlobalRef");
3250  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3251   Handle ref_handle(thread, JNIHandles::resolve(ref));
3252   jweak ret = JNIHandles::make_weak_global(ref_handle);
3253  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3254   return ret;
3255 JNI_END
3256 
3257 // Must be JNI_ENTRY (with HandleMark)
3258 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3259   JNIWrapper("jni_DeleteWeakGlobalRef");
3260   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3261   JNIHandles::destroy_weak_global(ref);
3262   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3263 JNI_END
3264 
3265 
3266 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3267   JNIWrapper("jni_ExceptionCheck");
3268  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3269   jni_check_async_exceptions(thread);
3270   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3271  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3272   return ret;
3273 JNI_END
3274 
3275 
3276 // Initialization state for three routines below relating to
3277 // java.nio.DirectBuffers
3278 static          int directBufferSupportInitializeStarted = 0;
3279 static volatile int directBufferSupportInitializeEnded   = 0;
3280 static volatile int directBufferSupportInitializeFailed  = 0;
3281 static jclass    bufferClass                 = NULL;
3282 static jclass    directBufferClass           = NULL;
3283 static jclass    directByteBufferClass       = NULL;
3284 static jmethodID directByteBufferConstructor = NULL;
3285 static jfieldID  directBufferAddressField    = NULL;
3286 static jfieldID  bufferCapacityField         = NULL;
3287 
3288 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3289   Handle loader;            // null (bootstrap) loader
3290   Handle protection_domain; // null protection domain
3291 
3292   TempNewSymbol sym = SymbolTable::new_symbol(name);
3293   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3294 
3295   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3296     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3297   }
3298   return result;
3299 }
3300 
3301 // These lookups are done with the NULL (bootstrap) ClassLoader to
3302 // circumvent any security checks that would be done by jni_FindClass.
3303 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3304 {
3305   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3306   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3307   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3308   return true;
3309 }
3310 JNI_END
3311 
3312 
3313 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3314   if (directBufferSupportInitializeFailed) {
3315     return false;
3316   }
3317 
3318   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3319     if (!lookupDirectBufferClasses(env)) {
3320       directBufferSupportInitializeFailed = 1;
3321       return false;
3322     }
3323 
3324     // Make global references for these
3325     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3326     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3327     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3328 
3329     // Get needed field and method IDs
3330     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3331     if (env->ExceptionCheck()) {
3332       env->ExceptionClear();
3333       directBufferSupportInitializeFailed = 1;
3334       return false;
3335     }
3336     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3337     if (env->ExceptionCheck()) {
3338       env->ExceptionClear();
3339       directBufferSupportInitializeFailed = 1;
3340       return false;
3341     }
3342     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3343     if (env->ExceptionCheck()) {
3344       env->ExceptionClear();
3345       directBufferSupportInitializeFailed = 1;
3346       return false;
3347     }
3348 
3349     if ((directByteBufferConstructor == NULL) ||
3350         (directBufferAddressField    == NULL) ||
3351         (bufferCapacityField         == NULL)) {
3352       directBufferSupportInitializeFailed = 1;
3353       return false;
3354     }
3355 
3356     directBufferSupportInitializeEnded = 1;
3357   } else {
3358     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3359       os::naked_yield();
3360     }
3361   }
3362 
3363   return !directBufferSupportInitializeFailed;
3364 }
3365 
3366 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3367 {
3368   // thread_from_jni_environment() will block if VM is gone.
3369   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3370 
3371   JNIWrapper("jni_NewDirectByteBuffer");
3372  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3373 
3374   if (!directBufferSupportInitializeEnded) {
3375     if (!initializeDirectBufferSupport(env, thread)) {
3376       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3377       return NULL;
3378     }
3379   }
3380 
3381   // Being paranoid about accidental sign extension on address
3382   jlong addr = (jlong) ((uintptr_t) address);
3383   // NOTE that package-private DirectByteBuffer constructor currently
3384   // takes int capacity
3385   jint  cap  = (jint)  capacity;
3386   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3387   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3388   return ret;
3389 }
3390 
3391 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3392                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3393 
3394 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3395 {
3396   // thread_from_jni_environment() will block if VM is gone.
3397   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3398 
3399   JNIWrapper("jni_GetDirectBufferAddress");
3400   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3401   void* ret = NULL;
3402   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3403 
3404   if (!directBufferSupportInitializeEnded) {
3405     if (!initializeDirectBufferSupport(env, thread)) {
3406       return 0;
3407     }
3408   }
3409 
3410   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3411     return 0;
3412   }
3413 
3414   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3415   return ret;
3416 }
3417 
3418 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3419                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3420 
3421 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3422 {
3423   // thread_from_jni_environment() will block if VM is gone.
3424   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3425 
3426   JNIWrapper("jni_GetDirectBufferCapacity");
3427   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3428   jlong ret = -1;
3429   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3430 
3431   if (!directBufferSupportInitializeEnded) {
3432     if (!initializeDirectBufferSupport(env, thread)) {
3433       ret = 0;
3434       return ret;
3435     }
3436   }
3437 
3438   if (buf == NULL) {
3439     return -1;
3440   }
3441 
3442   if (!env->IsInstanceOf(buf, directBufferClass)) {
3443     return -1;
3444   }
3445 
3446   // NOTE that capacity is currently an int in the implementation
3447   ret = env->GetIntField(buf, bufferCapacityField);
3448   return ret;
3449 }
3450 
3451 
3452 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3453   JNIWrapper("GetVersion");
3454   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3455   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3456   return CurrentVersion;
3457 JNI_END
3458 
3459 extern struct JavaVM_ main_vm;
3460 
3461 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3462   JNIWrapper("jni_GetJavaVM");
3463   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3464   *vm  = (JavaVM *)(&main_vm);
3465   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3466   return JNI_OK;
3467 JNI_END
3468 
3469 
3470 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3471   JNIWrapper("GetModule");
3472   return Modules::get_module(clazz, THREAD);
3473 JNI_END
3474 
3475 
3476 // Structure containing all jni functions
3477 struct JNINativeInterface_ jni_NativeInterface = {
3478     NULL,
3479     NULL,
3480     NULL,
3481 
3482     NULL,
3483 
3484     jni_GetVersion,
3485 
3486     jni_DefineClass,
3487     jni_FindClass,
3488 
3489     jni_FromReflectedMethod,
3490     jni_FromReflectedField,
3491 
3492     jni_ToReflectedMethod,
3493 
3494     jni_GetSuperclass,
3495     jni_IsAssignableFrom,
3496 
3497     jni_ToReflectedField,
3498 
3499     jni_Throw,
3500     jni_ThrowNew,
3501     jni_ExceptionOccurred,
3502     jni_ExceptionDescribe,
3503     jni_ExceptionClear,
3504     jni_FatalError,
3505 
3506     jni_PushLocalFrame,
3507     jni_PopLocalFrame,
3508 
3509     jni_NewGlobalRef,
3510     jni_DeleteGlobalRef,
3511     jni_DeleteLocalRef,
3512     jni_IsSameObject,
3513 
3514     jni_NewLocalRef,
3515     jni_EnsureLocalCapacity,
3516 
3517     jni_AllocObject,
3518     jni_NewObject,
3519     jni_NewObjectV,
3520     jni_NewObjectA,
3521 
3522     jni_GetObjectClass,
3523     jni_IsInstanceOf,
3524 
3525     jni_GetMethodID,
3526 
3527     jni_CallObjectMethod,
3528     jni_CallObjectMethodV,
3529     jni_CallObjectMethodA,
3530     jni_CallBooleanMethod,
3531     jni_CallBooleanMethodV,
3532     jni_CallBooleanMethodA,
3533     jni_CallByteMethod,
3534     jni_CallByteMethodV,
3535     jni_CallByteMethodA,
3536     jni_CallCharMethod,
3537     jni_CallCharMethodV,
3538     jni_CallCharMethodA,
3539     jni_CallShortMethod,
3540     jni_CallShortMethodV,
3541     jni_CallShortMethodA,
3542     jni_CallIntMethod,
3543     jni_CallIntMethodV,
3544     jni_CallIntMethodA,
3545     jni_CallLongMethod,
3546     jni_CallLongMethodV,
3547     jni_CallLongMethodA,
3548     jni_CallFloatMethod,
3549     jni_CallFloatMethodV,
3550     jni_CallFloatMethodA,
3551     jni_CallDoubleMethod,
3552     jni_CallDoubleMethodV,
3553     jni_CallDoubleMethodA,
3554     jni_CallVoidMethod,
3555     jni_CallVoidMethodV,
3556     jni_CallVoidMethodA,
3557 
3558     jni_CallNonvirtualObjectMethod,
3559     jni_CallNonvirtualObjectMethodV,
3560     jni_CallNonvirtualObjectMethodA,
3561     jni_CallNonvirtualBooleanMethod,
3562     jni_CallNonvirtualBooleanMethodV,
3563     jni_CallNonvirtualBooleanMethodA,
3564     jni_CallNonvirtualByteMethod,
3565     jni_CallNonvirtualByteMethodV,
3566     jni_CallNonvirtualByteMethodA,
3567     jni_CallNonvirtualCharMethod,
3568     jni_CallNonvirtualCharMethodV,
3569     jni_CallNonvirtualCharMethodA,
3570     jni_CallNonvirtualShortMethod,
3571     jni_CallNonvirtualShortMethodV,
3572     jni_CallNonvirtualShortMethodA,
3573     jni_CallNonvirtualIntMethod,
3574     jni_CallNonvirtualIntMethodV,
3575     jni_CallNonvirtualIntMethodA,
3576     jni_CallNonvirtualLongMethod,
3577     jni_CallNonvirtualLongMethodV,
3578     jni_CallNonvirtualLongMethodA,
3579     jni_CallNonvirtualFloatMethod,
3580     jni_CallNonvirtualFloatMethodV,
3581     jni_CallNonvirtualFloatMethodA,
3582     jni_CallNonvirtualDoubleMethod,
3583     jni_CallNonvirtualDoubleMethodV,
3584     jni_CallNonvirtualDoubleMethodA,
3585     jni_CallNonvirtualVoidMethod,
3586     jni_CallNonvirtualVoidMethodV,
3587     jni_CallNonvirtualVoidMethodA,
3588 
3589     jni_GetFieldID,
3590 
3591     jni_GetObjectField,
3592     jni_GetBooleanField,
3593     jni_GetByteField,
3594     jni_GetCharField,
3595     jni_GetShortField,
3596     jni_GetIntField,
3597     jni_GetLongField,
3598     jni_GetFloatField,
3599     jni_GetDoubleField,
3600 
3601     jni_SetObjectField,
3602     jni_SetBooleanField,
3603     jni_SetByteField,
3604     jni_SetCharField,
3605     jni_SetShortField,
3606     jni_SetIntField,
3607     jni_SetLongField,
3608     jni_SetFloatField,
3609     jni_SetDoubleField,
3610 
3611     jni_GetStaticMethodID,
3612 
3613     jni_CallStaticObjectMethod,
3614     jni_CallStaticObjectMethodV,
3615     jni_CallStaticObjectMethodA,
3616     jni_CallStaticBooleanMethod,
3617     jni_CallStaticBooleanMethodV,
3618     jni_CallStaticBooleanMethodA,
3619     jni_CallStaticByteMethod,
3620     jni_CallStaticByteMethodV,
3621     jni_CallStaticByteMethodA,
3622     jni_CallStaticCharMethod,
3623     jni_CallStaticCharMethodV,
3624     jni_CallStaticCharMethodA,
3625     jni_CallStaticShortMethod,
3626     jni_CallStaticShortMethodV,
3627     jni_CallStaticShortMethodA,
3628     jni_CallStaticIntMethod,
3629     jni_CallStaticIntMethodV,
3630     jni_CallStaticIntMethodA,
3631     jni_CallStaticLongMethod,
3632     jni_CallStaticLongMethodV,
3633     jni_CallStaticLongMethodA,
3634     jni_CallStaticFloatMethod,
3635     jni_CallStaticFloatMethodV,
3636     jni_CallStaticFloatMethodA,
3637     jni_CallStaticDoubleMethod,
3638     jni_CallStaticDoubleMethodV,
3639     jni_CallStaticDoubleMethodA,
3640     jni_CallStaticVoidMethod,
3641     jni_CallStaticVoidMethodV,
3642     jni_CallStaticVoidMethodA,
3643 
3644     jni_GetStaticFieldID,
3645 
3646     jni_GetStaticObjectField,
3647     jni_GetStaticBooleanField,
3648     jni_GetStaticByteField,
3649     jni_GetStaticCharField,
3650     jni_GetStaticShortField,
3651     jni_GetStaticIntField,
3652     jni_GetStaticLongField,
3653     jni_GetStaticFloatField,
3654     jni_GetStaticDoubleField,
3655 
3656     jni_SetStaticObjectField,
3657     jni_SetStaticBooleanField,
3658     jni_SetStaticByteField,
3659     jni_SetStaticCharField,
3660     jni_SetStaticShortField,
3661     jni_SetStaticIntField,
3662     jni_SetStaticLongField,
3663     jni_SetStaticFloatField,
3664     jni_SetStaticDoubleField,
3665 
3666     jni_NewString,
3667     jni_GetStringLength,
3668     jni_GetStringChars,
3669     jni_ReleaseStringChars,
3670 
3671     jni_NewStringUTF,
3672     jni_GetStringUTFLength,
3673     jni_GetStringUTFChars,
3674     jni_ReleaseStringUTFChars,
3675 
3676     jni_GetArrayLength,
3677 
3678     jni_NewObjectArray,
3679     jni_GetObjectArrayElement,
3680     jni_SetObjectArrayElement,
3681 
3682     jni_NewBooleanArray,
3683     jni_NewByteArray,
3684     jni_NewCharArray,
3685     jni_NewShortArray,
3686     jni_NewIntArray,
3687     jni_NewLongArray,
3688     jni_NewFloatArray,
3689     jni_NewDoubleArray,
3690 
3691     jni_GetBooleanArrayElements,
3692     jni_GetByteArrayElements,
3693     jni_GetCharArrayElements,
3694     jni_GetShortArrayElements,
3695     jni_GetIntArrayElements,
3696     jni_GetLongArrayElements,
3697     jni_GetFloatArrayElements,
3698     jni_GetDoubleArrayElements,
3699 
3700     jni_ReleaseBooleanArrayElements,
3701     jni_ReleaseByteArrayElements,
3702     jni_ReleaseCharArrayElements,
3703     jni_ReleaseShortArrayElements,
3704     jni_ReleaseIntArrayElements,
3705     jni_ReleaseLongArrayElements,
3706     jni_ReleaseFloatArrayElements,
3707     jni_ReleaseDoubleArrayElements,
3708 
3709     jni_GetBooleanArrayRegion,
3710     jni_GetByteArrayRegion,
3711     jni_GetCharArrayRegion,
3712     jni_GetShortArrayRegion,
3713     jni_GetIntArrayRegion,
3714     jni_GetLongArrayRegion,
3715     jni_GetFloatArrayRegion,
3716     jni_GetDoubleArrayRegion,
3717 
3718     jni_SetBooleanArrayRegion,
3719     jni_SetByteArrayRegion,
3720     jni_SetCharArrayRegion,
3721     jni_SetShortArrayRegion,
3722     jni_SetIntArrayRegion,
3723     jni_SetLongArrayRegion,
3724     jni_SetFloatArrayRegion,
3725     jni_SetDoubleArrayRegion,
3726 
3727     jni_RegisterNatives,
3728     jni_UnregisterNatives,
3729 
3730     jni_MonitorEnter,
3731     jni_MonitorExit,
3732 
3733     jni_GetJavaVM,
3734 
3735     jni_GetStringRegion,
3736     jni_GetStringUTFRegion,
3737 
3738     jni_GetPrimitiveArrayCritical,
3739     jni_ReleasePrimitiveArrayCritical,
3740 
3741     jni_GetStringCritical,
3742     jni_ReleaseStringCritical,
3743 
3744     jni_NewWeakGlobalRef,
3745     jni_DeleteWeakGlobalRef,
3746 
3747     jni_ExceptionCheck,
3748 
3749     jni_NewDirectByteBuffer,
3750     jni_GetDirectBufferAddress,
3751     jni_GetDirectBufferCapacity,
3752 
3753     // New 1_6 features
3754 
3755     jni_GetObjectRefType,
3756 
3757     // Module features
3758 
3759     jni_GetModule
3760 };
3761 
3762 
3763 // For jvmti use to modify jni function table.
3764 // Java threads in native contiues to run until it is transitioned
3765 // to VM at safepoint. Before the transition or before it is blocked
3766 // for safepoint it may access jni function table. VM could crash if
3767 // any java thread access the jni function table in the middle of memcpy.
3768 // To avoid this each function pointers are copied automically.
3769 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3770   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3771   intptr_t *a = (intptr_t *) jni_functions();
3772   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3773   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3774     Atomic::store(*b++, a++);
3775   }
3776 }
3777 
3778 void quicken_jni_functions() {
3779   // Replace Get<Primitive>Field with fast versions
3780   if (UseFastJNIAccessors && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls) {
3781     address func;
3782     func = JNI_FastGetField::generate_fast_get_boolean_field();
3783     if (func != (address)-1) {
3784       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3785     }
3786     func = JNI_FastGetField::generate_fast_get_byte_field();
3787     if (func != (address)-1) {
3788       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3789     }
3790     func = JNI_FastGetField::generate_fast_get_char_field();
3791     if (func != (address)-1) {
3792       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3793     }
3794     func = JNI_FastGetField::generate_fast_get_short_field();
3795     if (func != (address)-1) {
3796       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3797     }
3798     func = JNI_FastGetField::generate_fast_get_int_field();
3799     if (func != (address)-1) {
3800       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3801     }
3802     func = JNI_FastGetField::generate_fast_get_long_field();
3803     if (func != (address)-1) {
3804       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3805     }
3806     func = JNI_FastGetField::generate_fast_get_float_field();
3807     if (func != (address)-1) {
3808       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3809     }
3810     func = JNI_FastGetField::generate_fast_get_double_field();
3811     if (func != (address)-1) {
3812       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3813     }
3814   }
3815 }
3816 
3817 // Returns the function structure
3818 struct JNINativeInterface_* jni_functions() {
3819 #if INCLUDE_JNI_CHECK
3820   if (CheckJNICalls) return jni_functions_check();
3821 #endif // INCLUDE_JNI_CHECK
3822   return &jni_NativeInterface;
3823 }
3824 
3825 // Returns the function structure
3826 struct JNINativeInterface_* jni_functions_nocheck() {
3827   return &jni_NativeInterface;
3828 }
3829 
3830 static void post_thread_start_event(const JavaThread* jt) {
3831   assert(jt != NULL, "invariant");
3832   EventThreadStart event;
3833   if (event.should_commit()) {
3834     event.set_thread(JFR_THREAD_ID(jt));
3835     event.commit();
3836   }
3837 }
3838 
3839 // Invocation API
3840 
3841 
3842 // Forward declaration
3843 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3844 
3845 // Global invocation API vars
3846 volatile int vm_created = 0;
3847 // Indicate whether it is safe to recreate VM
3848 volatile int safe_to_recreate_vm = 1;
3849 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3850 
3851 
3852 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3853 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3854 
3855 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3856                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3857 
3858 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3859   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3860   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3861   jint ret = JNI_ERR;
3862   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3863 
3864   if (Threads::is_supported_jni_version(args->version)) {
3865     ret = JNI_OK;
3866   }
3867   // 1.1 style no longer supported in hotspot.
3868   // According the JNI spec, we should update args->version on return.
3869   // We also use the structure to communicate with launcher about default
3870   // stack size.
3871   if (args->version == JNI_VERSION_1_1) {
3872     args->version = JNI_VERSION_1_2;
3873     // javaStackSize is int in arguments structure
3874     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3875     args->javaStackSize = (jint)(ThreadStackSize * K);
3876   }
3877   return ret;
3878 }
3879 
3880 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3881                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3882 
3883 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3884   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3885 
3886   jint result = JNI_ERR;
3887   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3888 
3889   // We're about to use Atomic::xchg for synchronization.  Some Zero
3890   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3891   // but __sync_lock_test_and_set is not guaranteed to do what we want
3892   // on all architectures.  So we check it works before relying on it.
3893 #if defined(ZERO) && defined(ASSERT)
3894   {
3895     jint a = 0xcafebabe;
3896     jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3897     void *c = &a;
3898     void *d = Atomic::xchg(&b, &c);
3899     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3900     assert(c == &b && d == &a, "Atomic::xchg() works");
3901   }
3902 #endif // ZERO && ASSERT
3903 
3904   // At the moment it's only possible to have one Java VM,
3905   // since some of the runtime state is in global variables.
3906 
3907   // We cannot use our mutex locks here, since they only work on
3908   // Threads. We do an atomic compare and exchange to ensure only
3909   // one thread can call this method at a time
3910 
3911   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3912   // the add/dec implementations are dependent on whether we are running
3913   // on a multiprocessor Atomic::xchg does not have this problem.
3914   if (Atomic::xchg(1, &vm_created) == 1) {
3915     return JNI_EEXIST;   // already created, or create attempt in progress
3916   }
3917   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3918     return JNI_ERR;  // someone tried and failed and retry not allowed.
3919   }
3920 
3921   assert(vm_created == 1, "vm_created is true during the creation");
3922 
3923   /**
3924    * Certain errors during initialization are recoverable and do not
3925    * prevent this method from being called again at a later time
3926    * (perhaps with different arguments).  However, at a certain
3927    * point during initialization if an error occurs we cannot allow
3928    * this function to be called again (or it will crash).  In those
3929    * situations, the 'canTryAgain' flag is set to false, which atomically
3930    * sets safe_to_recreate_vm to 1, such that any new call to
3931    * JNI_CreateJavaVM will immediately fail using the above logic.
3932    */
3933   bool can_try_again = true;
3934 
3935   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3936   if (result == JNI_OK) {
3937     JavaThread *thread = JavaThread::current();
3938     assert(!thread->has_pending_exception(), "should have returned not OK");
3939     /* thread is thread_in_vm here */
3940     *vm = (JavaVM *)(&main_vm);
3941     *(JNIEnv**)penv = thread->jni_environment();
3942 
3943 #if INCLUDE_JVMCI
3944     if (EnableJVMCI) {
3945       if (UseJVMCICompiler) {
3946         // JVMCI is initialized on a CompilerThread
3947         if (BootstrapJVMCI) {
3948           JavaThread* THREAD = thread;
3949           JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3950           compiler->bootstrap(THREAD);
3951           if (HAS_PENDING_EXCEPTION) {
3952             HandleMark hm;
3953             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3954           }
3955         }
3956       }
3957     }
3958 #endif
3959 
3960     // Notify JVMTI
3961     if (JvmtiExport::should_post_thread_life()) {
3962        JvmtiExport::post_thread_start(thread);
3963     }
3964 
3965     post_thread_start_event(thread);
3966 
3967 #ifndef PRODUCT
3968     if (ReplayCompiles) ciReplay::replay(thread);
3969 
3970     // Some platforms (like Win*) need a wrapper around these test
3971     // functions in order to properly handle error conditions.
3972     VMError::test_error_handler();
3973 #endif
3974 
3975     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3976     ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
3977   } else {
3978     // If create_vm exits because of a pending exception, exit with that
3979     // exception.  In the future when we figure out how to reclaim memory,
3980     // we may be able to exit with JNI_ERR and allow the calling application
3981     // to continue.
3982     if (Universe::is_fully_initialized()) {
3983       // otherwise no pending exception possible - VM will already have aborted
3984       JavaThread* THREAD = JavaThread::current();
3985       if (HAS_PENDING_EXCEPTION) {
3986         HandleMark hm;
3987         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3988       }
3989     }
3990 
3991     if (can_try_again) {
3992       // reset safe_to_recreate_vm to 1 so that retrial would be possible
3993       safe_to_recreate_vm = 1;
3994     }
3995 
3996     // Creation failed. We must reset vm_created
3997     *vm = 0;
3998     *(JNIEnv**)penv = 0;
3999     // reset vm_created last to avoid race condition. Use OrderAccess to
4000     // control both compiler and architectural-based reordering.
4001     OrderAccess::release_store(&vm_created, 0);
4002   }
4003 
4004   // Flush stdout and stderr before exit.
4005   fflush(stdout);
4006   fflush(stderr);
4007 
4008   return result;
4009 
4010 }
4011 
4012 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4013   jint result = JNI_ERR;
4014   // On Windows, let CreateJavaVM run with SEH protection
4015 #ifdef _WIN32
4016   __try {
4017 #endif
4018     result = JNI_CreateJavaVM_inner(vm, penv, args);
4019 #ifdef _WIN32
4020   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4021     // Nothing to do.
4022   }
4023 #endif
4024   return result;
4025 }
4026 
4027 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4028   // See bug 4367188, the wrapper can sometimes cause VM crashes
4029   // JNIWrapper("GetCreatedJavaVMs");
4030 
4031   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4032 
4033   if (vm_created == 1) {
4034     if (numVMs != NULL) *numVMs = 1;
4035     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4036   } else {
4037     if (numVMs != NULL) *numVMs = 0;
4038   }
4039   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4040   return JNI_OK;
4041 }
4042 
4043 extern "C" {
4044 
4045 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4046                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4047 
4048 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4049   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4050   jint res = JNI_ERR;
4051   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4052 
4053   if (vm_created == 0) {
4054     res = JNI_ERR;
4055     return res;
4056   }
4057 
4058   JNIWrapper("DestroyJavaVM");
4059   JNIEnv *env;
4060   JavaVMAttachArgs destroyargs;
4061   destroyargs.version = CurrentVersion;
4062   destroyargs.name = (char *)"DestroyJavaVM";
4063   destroyargs.group = NULL;
4064   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4065   if (res != JNI_OK) {
4066     return res;
4067   }
4068 
4069   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4070   JavaThread* thread = JavaThread::current();
4071   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4072   if (Threads::destroy_vm()) {
4073     // Should not change thread state, VM is gone
4074     vm_created = 0;
4075     res = JNI_OK;
4076     return res;
4077   } else {
4078     ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4079     res = JNI_ERR;
4080     return res;
4081   }
4082 }
4083 
4084 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4085   jint result = JNI_ERR;
4086   // On Windows, we need SEH protection
4087 #ifdef _WIN32
4088   __try {
4089 #endif
4090     result = jni_DestroyJavaVM_inner(vm);
4091 #ifdef _WIN32
4092   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4093     // Nothing to do.
4094   }
4095 #endif
4096   return result;
4097 }
4098 
4099 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4100   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4101 
4102   // Check below commented out from JDK1.2fcs as well
4103   /*
4104   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4105     return JNI_EVERSION;
4106   }
4107   */
4108 
4109   Thread* t = Thread::current_or_null();
4110   if (t != NULL) {
4111     // If the thread has been attached this operation is a no-op
4112     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4113     return JNI_OK;
4114   }
4115 
4116   // Create a thread and mark it as attaching so it will be skipped by the
4117   // ThreadsListEnumerator - see CR 6404306
4118   JavaThread* thread = new JavaThread(true);
4119 
4120   // Set correct safepoint info. The thread is going to call into Java when
4121   // initializing the Java level thread object. Hence, the correct state must
4122   // be set in order for the Safepoint code to deal with it correctly.
4123   thread->set_thread_state(_thread_in_vm);
4124   thread->record_stack_base_and_size();
4125   thread->register_thread_stack_with_NMT();
4126   thread->initialize_thread_current();
4127 
4128   if (!os::create_attached_thread(thread)) {
4129     thread->smr_delete();
4130     return JNI_ERR;
4131   }
4132   // Enable stack overflow checks
4133   thread->create_stack_guard_pages();
4134 
4135   thread->initialize_tlab();
4136 
4137   thread->cache_global_variables();
4138 
4139   // This thread will not do a safepoint check, since it has
4140   // not been added to the Thread list yet.
4141   { MutexLocker ml(Threads_lock);
4142     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4143     // avoid this thread trying to do a GC before it is added to the thread-list
4144     thread->set_active_handles(JNIHandleBlock::allocate_block());
4145     Threads::add(thread, daemon);
4146     // Avoid pushing frames with ea based optimizations while deoptimization is in progress
4147     while (JVMTIEscapeBarrier::deoptimizing_objects_for_all_threads()) {
4148       Threads_lock->wait();
4149     }
4150   }
4151   // Create thread group and name info from attach arguments
4152   oop group = NULL;
4153   char* thread_name = NULL;
4154   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4155     group = JNIHandles::resolve(args->group);
4156     thread_name = args->name; // may be NULL
4157   }
4158   if (group == NULL) group = Universe::main_thread_group();
4159 
4160   // Create Java level thread object and attach it to this thread
4161   bool attach_failed = false;
4162   {
4163     EXCEPTION_MARK;
4164     HandleMark hm(THREAD);
4165     Handle thread_group(THREAD, group);
4166     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4167     if (HAS_PENDING_EXCEPTION) {
4168       CLEAR_PENDING_EXCEPTION;
4169       // cleanup outside the handle mark.
4170       attach_failed = true;
4171     }
4172   }
4173 
4174   if (attach_failed) {
4175     // Added missing cleanup
4176     thread->cleanup_failed_attach_current_thread(daemon);
4177     return JNI_ERR;
4178   }
4179 
4180   // mark the thread as no longer attaching
4181   // this uses a fence to push the change through so we don't have
4182   // to regrab the threads_lock
4183   thread->set_done_attaching_via_jni();
4184 
4185   // Set java thread status.
4186   java_lang_Thread::set_thread_status(thread->threadObj(),
4187               java_lang_Thread::RUNNABLE);
4188 
4189   // Notify the debugger
4190   if (JvmtiExport::should_post_thread_life()) {
4191     JvmtiExport::post_thread_start(thread);
4192   }
4193 
4194   post_thread_start_event(thread);
4195 
4196   *(JNIEnv**)penv = thread->jni_environment();
4197 
4198   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4199   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4200   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4201   // needed.
4202 
4203   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_native);
4204 
4205   // Perform any platform dependent FPU setup
4206   os::setup_fpu();
4207 
4208   return JNI_OK;
4209 }
4210 
4211 
4212 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4213   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4214   if (vm_created == 0) {
4215   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4216     return JNI_ERR;
4217   }
4218 
4219   JNIWrapper("AttachCurrentThread");
4220   jint ret = attach_current_thread(vm, penv, _args, false);
4221   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4222   return ret;
4223 }
4224 
4225 
4226 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4227   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4228 
4229   JNIWrapper("DetachCurrentThread");
4230 
4231   // If the thread has already been detached the operation is a no-op
4232   if (Thread::current_or_null() == NULL) {
4233     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4234     return JNI_OK;
4235   }
4236 
4237   VM_Exit::block_if_vm_exited();
4238 
4239   JavaThread* thread = JavaThread::current();
4240   if (thread->has_last_Java_frame()) {
4241     HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4242     // Can't detach a thread that's running java, that can't work.
4243     return JNI_ERR;
4244   }
4245 
4246   // Safepoint support. Have to do call-back to safepoint code, if in the
4247   // middle of a safepoint operation
4248   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4249 
4250   // XXX: Note that JavaThread::exit() call below removes the guards on the
4251   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4252   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4253   // of the guards is visible in jni_AttachCurrentThread above,
4254   // the removal of the guards is buried below in JavaThread::exit()
4255   // here. The abstraction should be more symmetrically either exposed
4256   // or hidden (e.g. it could probably be hidden in the same
4257   // (platform-dependent) methods where we do alternate stack
4258   // maintenance work?)
4259   thread->exit(false, JavaThread::jni_detach);
4260   thread->smr_delete();
4261 
4262   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4263   return JNI_OK;
4264 }
4265 
4266 DT_RETURN_MARK_DECL(GetEnv, jint
4267                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4268 
4269 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4270   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4271   jint ret = JNI_ERR;
4272   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4273 
4274   if (vm_created == 0) {
4275     *penv = NULL;
4276     ret = JNI_EDETACHED;
4277     return ret;
4278   }
4279 
4280   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4281     return ret;
4282   }
4283 
4284 #ifndef JVMPI_VERSION_1
4285 // need these in order to be polite about older agents
4286 #define JVMPI_VERSION_1   ((jint)0x10000001)
4287 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4288 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4289 #endif // !JVMPI_VERSION_1
4290 
4291   Thread* thread = Thread::current_or_null();
4292   if (thread != NULL && thread->is_Java_thread()) {
4293     if (Threads::is_supported_jni_version_including_1_1(version)) {
4294       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4295       ret = JNI_OK;
4296       return ret;
4297 
4298     } else if (version == JVMPI_VERSION_1 ||
4299                version == JVMPI_VERSION_1_1 ||
4300                version == JVMPI_VERSION_1_2) {
4301       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4302       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4303       ret = JNI_EVERSION;
4304       return ret;
4305     } else if (JvmtiExport::is_jvmdi_version(version)) {
4306       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4307       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4308       ret = JNI_EVERSION;
4309       return ret;
4310     } else {
4311       *penv = NULL;
4312       ret = JNI_EVERSION;
4313       return ret;
4314     }
4315   } else {
4316     *penv = NULL;
4317     ret = JNI_EDETACHED;
4318     return ret;
4319   }
4320 }
4321 
4322 
4323 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4324   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4325   if (vm_created == 0) {
4326   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4327     return JNI_ERR;
4328   }
4329 
4330   JNIWrapper("AttachCurrentThreadAsDaemon");
4331   jint ret = attach_current_thread(vm, penv, _args, true);
4332   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4333   return ret;
4334 }
4335 
4336 
4337 } // End extern "C"
4338 
4339 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4340     NULL,
4341     NULL,
4342     NULL,
4343 
4344     jni_DestroyJavaVM,
4345     jni_AttachCurrentThread,
4346     jni_DetachCurrentThread,
4347     jni_GetEnv,
4348     jni_AttachCurrentThreadAsDaemon
4349 };