1 /*
   2  * Copyright (c) 1997, 2017, 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 "memory/allocation.hpp"
  42 #include "memory/allocation.inline.hpp"
  43 #include "memory/oopFactory.hpp"
  44 #include "memory/resourceArea.hpp"
  45 #include "memory/universe.inline.hpp"
  46 #include "oops/instanceKlass.hpp"
  47 #include "oops/instanceOop.hpp"
  48 #include "oops/markOop.hpp"
  49 #include "oops/method.hpp"
  50 #include "oops/objArrayKlass.hpp"
  51 #include "oops/objArrayOop.inline.hpp"
  52 #include "oops/oop.inline.hpp"
  53 #include "oops/symbol.hpp"
  54 #include "oops/typeArrayKlass.hpp"
  55 #include "oops/typeArrayOop.hpp"
  56 #include "prims/jniCheck.hpp"
  57 #include "prims/jniExport.hpp"
  58 #include "prims/jniFastGetField.hpp"
  59 #include "prims/jvm_misc.hpp"
  60 #include "prims/jvmtiExport.hpp"
  61 #include "prims/jvmtiThreadState.hpp"
  62 #include "runtime/atomic.hpp"
  63 #include "runtime/compilationPolicy.hpp"
  64 #include "runtime/fieldDescriptor.hpp"
  65 #include "runtime/handles.inline.hpp"
  66 #include "runtime/interfaceSupport.hpp"
  67 #include "runtime/java.hpp"
  68 #include "runtime/javaCalls.hpp"
  69 #include "runtime/jfieldIDWorkaround.hpp"
  70 #include "runtime/orderAccess.inline.hpp"
  71 #include "runtime/reflection.hpp"
  72 #include "runtime/sharedRuntime.hpp"
  73 #include "runtime/signature.hpp"
  74 #include "runtime/thread.inline.hpp"
  75 #include "runtime/vm_operations.hpp"
  76 #include "services/memTracker.hpp"
  77 #include "services/runtimeService.hpp"
  78 #include "trace/traceMacros.hpp"
  79 #include "trace/tracing.hpp"
  80 #include "utilities/defaultStream.hpp"
  81 #include "utilities/dtrace.hpp"
  82 #include "utilities/events.hpp"
  83 #include "utilities/histogram.hpp"
  84 #include "utilities/internalVMTests.hpp"
  85 #include "utilities/macros.hpp"
  86 #include "utilities/vmError.hpp"
  87 #if INCLUDE_ALL_GCS
  88 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
  89 #endif // INCLUDE_ALL_GCS
  90 #if INCLUDE_JVMCI
  91 #include "jvmci/jvmciCompiler.hpp"
  92 #include "jvmci/jvmciRuntime.hpp"
  93 #endif
  94 
  95 static jint CurrentVersion = JNI_VERSION_10;
  96 
  97 #ifdef _WIN32
  98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
  99 #endif
 100 
 101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
 102 // '-return' probe regardless of the return path is taken out of the function.
 103 // Methods that have multiple return paths use this to avoid having to
 104 // instrument each return path.  Methods that use CHECK or THROW must use this
 105 // since those macros can cause an immedate uninstrumented return.
 106 //
 107 // In order to get the return value, a reference to the variable containing
 108 // the return value must be passed to the contructor of the object, and
 109 // the return value must be set before return (since the mark object has
 110 // a reference to it).
 111 //
 112 // Example:
 113 // DT_RETURN_MARK_DECL(SomeFunc, int);
 114 // JNI_ENTRY(int, SomeFunc, ...)
 115 //   int return_value = 0;
 116 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 117 //   foo(CHECK_0)
 118 //   return_value = 5;
 119 //   return return_value;
 120 // JNI_END
 121 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 122   DTRACE_ONLY(                                                             \
 123     class DTraceReturnProbeMark_##name {                                   \
 124      public:                                                               \
 125       const type& _ret_ref;                                                \
 126       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 127       ~DTraceReturnProbeMark_##name() {                                    \
 128         probe;                                                             \
 129       }                                                                    \
 130     }                                                                      \
 131   )
 132 // Void functions are simpler since there's no return value
 133 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 134   DTRACE_ONLY(                                                             \
 135     class DTraceReturnProbeMark_##name {                                   \
 136      public:                                                               \
 137       ~DTraceReturnProbeMark_##name() {                                    \
 138         probe;                                                             \
 139       }                                                                    \
 140     }                                                                      \
 141   )
 142 
 143 // Place these macros in the function to mark the return.  Non-void
 144 // functions need the type and address of the return value.
 145 #define DT_RETURN_MARK(name, type, ref) \
 146   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 147 #define DT_VOID_RETURN_MARK(name) \
 148   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 149 
 150 
 151 // Use these to select distinct code for floating-point vs. non-floating point
 152 // situations.  Used from within common macros where we need slightly
 153 // different behavior for Float/Double
 154 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 155 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 156 #define FP_SELECT_Char(intcode, fpcode)    intcode
 157 #define FP_SELECT_Short(intcode, fpcode)   intcode
 158 #define FP_SELECT_Object(intcode, fpcode)  intcode
 159 #define FP_SELECT_Int(intcode, fpcode)     intcode
 160 #define FP_SELECT_Long(intcode, fpcode)    intcode
 161 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 162 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 163 #define FP_SELECT(TypeName, intcode, fpcode) \
 164   FP_SELECT_##TypeName(intcode, fpcode)
 165 
 166 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 167 // (dtrace doesn't do FP yet)
 168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 169   FP_SELECT(TypeName, \
 170     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 172   FP_SELECT(TypeName, \
 173     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 174 
 175 
 176 // out-of-line helpers for class jfieldIDWorkaround:
 177 
 178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 179   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 180     uintptr_t as_uint = (uintptr_t) id;
 181     intptr_t offset = raw_instance_offset(id);
 182     if (is_checked_jfieldID(id)) {
 183       if (!klass_hash_ok(k, id)) {
 184         return false;
 185       }
 186     }
 187     return InstanceKlass::cast(k)->contains_field_offset(offset);
 188   } else {
 189     JNIid* result = (JNIid*) id;
 190 #ifdef ASSERT
 191     return result != NULL && result->is_static_field_id();
 192 #else
 193     return result != NULL;
 194 #endif
 195   }
 196 }
 197 
 198 
 199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
 200   if (offset <= small_offset_mask) {
 201     Klass* field_klass = k;
 202     Klass* super_klass = field_klass->super();
 203     // With compressed oops the most super class with nonstatic fields would
 204     // be the owner of fields embedded in the header.
 205     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 206            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 207       field_klass = super_klass;   // super contains the field also
 208       super_klass = field_klass->super();
 209     }
 210     debug_only(NoSafepointVerifier nosafepoint;)
 211     uintptr_t klass_hash = field_klass->identity_hash();
 212     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 213   } else {
 214 #if 0
 215     #ifndef PRODUCT
 216     {
 217       ResourceMark rm;
 218       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 219     }
 220     #endif
 221 #endif
 222     return 0;
 223   }
 224 }
 225 
 226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 227   uintptr_t as_uint = (uintptr_t) id;
 228   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 229   do {
 230     debug_only(NoSafepointVerifier nosafepoint;)
 231     // Could use a non-blocking query for identity_hash here...
 232     if ((k->identity_hash() & klass_mask) == klass_hash)
 233       return true;
 234     k = k->super();
 235   } while (k != NULL);
 236   return false;
 237 }
 238 
 239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 240   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 241   uintptr_t as_uint = (uintptr_t) id;
 242   intptr_t offset = raw_instance_offset(id);
 243   if (VerifyJNIFields) {
 244     if (is_checked_jfieldID(id)) {
 245       guarantee(klass_hash_ok(k, id),
 246     "Bug in native code: jfieldID class must match object");
 247     } else {
 248 #if 0
 249       #ifndef PRODUCT
 250       if (Verbose) {
 251   ResourceMark rm;
 252   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 253       }
 254       #endif
 255 #endif
 256     }
 257   }
 258   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 259       "Bug in native code: jfieldID offset must address interior of object");
 260 }
 261 
 262 // Wrapper to trace JNI functions
 263 
 264 #ifdef ASSERT
 265   Histogram* JNIHistogram;
 266   static volatile int JNIHistogram_lock = 0;
 267 
 268   class JNIHistogramElement : public HistogramElement {
 269     public:
 270      JNIHistogramElement(const char* name);
 271   };
 272 
 273   JNIHistogramElement::JNIHistogramElement(const char* elementName) {
 274     _name = elementName;
 275     uintx count = 0;
 276 
 277     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
 278       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
 279         count +=1;
 280         if ( (WarnOnStalledSpinLock > 0)
 281           && (count % WarnOnStalledSpinLock == 0)) {
 282           warning("JNIHistogram_lock seems to be stalled");
 283         }
 284       }
 285      }
 286 
 287 
 288     if(JNIHistogram == NULL)
 289       JNIHistogram = new Histogram("JNI Call Counts",100);
 290 
 291     JNIHistogram->add_element(this);
 292     Atomic::dec(&JNIHistogram_lock);
 293   }
 294 
 295   #define JNICountWrapper(arg)                                     \
 296      static JNIHistogramElement* e = new JNIHistogramElement(arg); \
 297       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
 298      if (e != NULL) e->increment_count()
 299   #define JNIWrapper(arg) JNICountWrapper(arg);
 300 #else
 301   #define JNIWrapper(arg)
 302 #endif
 303 
 304 
 305 // Implementation of JNI entries
 306 
 307 DT_RETURN_MARK_DECL(DefineClass, jclass
 308                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 309 
 310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 311                                   const jbyte *buf, jsize bufLen))
 312   JNIWrapper("DefineClass");
 313 
 314   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 315     env, (char*) name, loaderRef, (char*) buf, bufLen);
 316 
 317   jclass cls = NULL;
 318   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 319 
 320   TempNewSymbol class_name = NULL;
 321   // Since exceptions can be thrown, class initialization can take place
 322   // if name is NULL no check for class name in .class stream has to be made.
 323   if (name != NULL) {
 324     const int str_len = (int)strlen(name);
 325     if (str_len > Symbol::max_length()) {
 326       // It's impossible to create this class;  the name cannot fit
 327       // into the constant pool.
 328       Exceptions::fthrow(THREAD_AND_LOCATION,
 329                          vmSymbols::java_lang_NoClassDefFoundError(),
 330                          "Class name exceeds maximum length of %d: %s",
 331                          Symbol::max_length(),
 332                          name);
 333       return 0;
 334     }
 335     class_name = SymbolTable::new_symbol(name, CHECK_NULL);
 336   }
 337   ResourceMark rm(THREAD);
 338   ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
 339   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 340 
 341   if (UsePerfData && !class_loader.is_null()) {
 342     // check whether the current caller thread holds the lock or not.
 343     // If not, increment the corresponding counter
 344     if (ObjectSynchronizer::
 345         query_lock_ownership((JavaThread*)THREAD, class_loader) !=
 346         ObjectSynchronizer::owner_self) {
 347       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
 348     }
 349   }
 350   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 351                                                    class_loader,
 352                                                    Handle(),
 353                                                    &st,
 354                                                    CHECK_NULL);
 355 
 356   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 357     trace_class_resolution(k);
 358   }
 359 
 360   cls = (jclass)JNIHandles::make_local(
 361     env, k->java_mirror());
 362   return cls;
 363 JNI_END
 364 
 365 
 366 
 367 static bool first_time_FindClass = true;
 368 
 369 DT_RETURN_MARK_DECL(FindClass, jclass
 370                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 371 
 372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 373   JNIWrapper("FindClass");
 374 
 375   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 376 
 377   jclass result = NULL;
 378   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 379 
 380   // Remember if we are the first invocation of jni_FindClass
 381   bool first_time = first_time_FindClass;
 382   first_time_FindClass = false;
 383 
 384   // Sanity check the name:  it cannot be null or larger than the maximum size
 385   // name we can fit in the constant pool.
 386   if (name == NULL) {
 387     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 388   }
 389   if ((int)strlen(name) > Symbol::max_length()) {
 390     Exceptions::fthrow(THREAD_AND_LOCATION,
 391                        vmSymbols::java_lang_NoClassDefFoundError(),
 392                        "Class name exceeds maximum length of %d: %s",
 393                        Symbol::max_length(),
 394                        name);
 395     return 0;
 396   }
 397 
 398   //%note jni_3
 399   Handle protection_domain;
 400   // Find calling class
 401   Klass* k = thread->security_get_caller_class(0);
 402   // default to the system loader when no context
 403   Handle loader(THREAD, SystemDictionary::java_system_loader());
 404   if (k != NULL) {
 405     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 406     // in the correct class context.
 407     if (k->class_loader() == NULL &&
 408         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 409       JavaValue result(T_OBJECT);
 410       JavaCalls::call_static(&result, k,
 411                              vmSymbols::getFromClass_name(),
 412                              vmSymbols::void_class_signature(),
 413                              CHECK_NULL);
 414       // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
 415       // a non-NULL Class object.  When invoked from JNI_OnUnload,
 416       // it will return NULL to indicate no context.
 417       oop mirror = (oop) result.get_jobject();
 418       if (mirror != NULL) {
 419         Klass* fromClass = java_lang_Class::as_Klass(mirror);
 420         loader = Handle(THREAD, fromClass->class_loader());
 421         protection_domain = Handle(THREAD, fromClass->protection_domain());
 422       }
 423     } else {
 424       loader = Handle(THREAD, k->class_loader());
 425     }
 426   }
 427 
 428   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
 429   result = find_class_from_class_loader(env, sym, true, loader,
 430                                         protection_domain, true, thread);
 431 
 432   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 433     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 434   }
 435 
 436   // If we were the first invocation of jni_FindClass, we enable compilation again
 437   // rather than just allowing invocation counter to overflow and decay.
 438   // Controlled by flag DelayCompilationDuringStartup.
 439   if (first_time && !CompileTheWorld)
 440     CompilationPolicy::completed_vm_startup();
 441 
 442   return result;
 443 JNI_END
 444 
 445 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 446                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 447 
 448 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 449   JNIWrapper("FromReflectedMethod");
 450 
 451   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 452 
 453   jmethodID ret = NULL;
 454   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 455 
 456   // method is a handle to a java.lang.reflect.Method object
 457   oop reflected  = JNIHandles::resolve_non_null(method);
 458   oop mirror     = NULL;
 459   int slot       = 0;
 460 
 461   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 462     mirror = java_lang_reflect_Constructor::clazz(reflected);
 463     slot   = java_lang_reflect_Constructor::slot(reflected);
 464   } else {
 465     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 466     mirror = java_lang_reflect_Method::clazz(reflected);
 467     slot   = java_lang_reflect_Method::slot(reflected);
 468   }
 469   Klass* k1 = java_lang_Class::as_Klass(mirror);
 470 
 471   // Make sure class is initialized before handing id's out to methods
 472   k1->initialize(CHECK_NULL);
 473   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 474   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 475   return ret;
 476 JNI_END
 477 
 478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 479                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 480 
 481 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 482   JNIWrapper("FromReflectedField");
 483 
 484   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 485 
 486   jfieldID ret = NULL;
 487   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 488 
 489   // field is a handle to a java.lang.reflect.Field object
 490   oop reflected   = JNIHandles::resolve_non_null(field);
 491   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 492   Klass* k1       = java_lang_Class::as_Klass(mirror);
 493   int slot        = java_lang_reflect_Field::slot(reflected);
 494   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 495 
 496   // Make sure class is initialized before handing id's out to fields
 497   k1->initialize(CHECK_NULL);
 498 
 499   // First check if this is a static field
 500   if (modifiers & JVM_ACC_STATIC) {
 501     intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 502     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 503     assert(id != NULL, "corrupt Field object");
 504     debug_only(id->set_is_static_field_id();)
 505     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 506     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 507     return ret;
 508   }
 509 
 510   // The slot is the index of the field description in the field-array
 511   // The jfieldID is the offset of the field within the object
 512   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 513   intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 514   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 515   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
 516   return ret;
 517 JNI_END
 518 
 519 
 520 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 521                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 522 
 523 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 524   JNIWrapper("ToReflectedMethod");
 525 
 526   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 527 
 528   jobject ret = NULL;
 529   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 530 
 531   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 532   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 533   oop reflection_method;
 534   if (m->is_initializer()) {
 535     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 536   } else {
 537     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 538   }
 539   ret = JNIHandles::make_local(env, reflection_method);
 540   return ret;
 541 JNI_END
 542 
 543 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 544                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 545 
 546 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 547   JNIWrapper("GetSuperclass");
 548 
 549   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 550 
 551   jclass obj = NULL;
 552   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 553 
 554   oop mirror = JNIHandles::resolve_non_null(sub);
 555   // primitive classes return NULL
 556   if (java_lang_Class::is_primitive(mirror)) return NULL;
 557 
 558   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 559   // arrays return Object
 560   // interfaces return NULL
 561   // proper classes return Klass::super()
 562   Klass* k = java_lang_Class::as_Klass(mirror);
 563   if (k->is_interface()) return NULL;
 564 
 565   // return mirror for superclass
 566   Klass* super = k->java_super();
 567   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 568   debug_only(Klass* super2 = ( k->is_array_klass()
 569                                  ? SystemDictionary::Object_klass()
 570                                  : k->super() ) );
 571   assert(super == super2,
 572          "java_super computation depends on interface, array, other super");
 573   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 574   return obj;
 575 JNI_END
 576 
 577 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 578   JNIWrapper("IsSubclassOf");
 579 
 580   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 581 
 582   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 583   oop super_mirror = JNIHandles::resolve_non_null(super);
 584   if (java_lang_Class::is_primitive(sub_mirror) ||
 585       java_lang_Class::is_primitive(super_mirror)) {
 586     jboolean ret = (sub_mirror == super_mirror);
 587 
 588     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 589     return ret;
 590   }
 591   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 592   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 593   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 594   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 595                    JNI_TRUE : JNI_FALSE;
 596 
 597   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 598   return ret;
 599 JNI_END
 600 
 601 
 602 DT_RETURN_MARK_DECL(Throw, jint
 603                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 604 
 605 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 606   JNIWrapper("Throw");
 607 
 608   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 609 
 610   jint ret = JNI_OK;
 611   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 612 
 613   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 614   ShouldNotReachHere();
 615   return 0;  // Mute compiler.
 616 JNI_END
 617 
 618 
 619 DT_RETURN_MARK_DECL(ThrowNew, jint
 620                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 621 
 622 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 623   JNIWrapper("ThrowNew");
 624 
 625   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 626 
 627   jint ret = JNI_OK;
 628   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 629 
 630   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 631   Symbol*  name = k->name();
 632   Handle class_loader (THREAD,  k->class_loader());
 633   Handle protection_domain (THREAD, k->protection_domain());
 634   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 635   ShouldNotReachHere();
 636   return 0;  // Mute compiler.
 637 JNI_END
 638 
 639 
 640 // JNI functions only transform a pending async exception to a synchronous
 641 // exception in ExceptionOccurred and ExceptionCheck calls, since
 642 // delivering an async exception in other places won't change the native
 643 // code's control flow and would be harmful when native code further calls
 644 // JNI functions with a pending exception. Async exception is also checked
 645 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 646 // false but deliver the async exception at the very end during
 647 // state transition.
 648 
 649 static void jni_check_async_exceptions(JavaThread *thread) {
 650   assert(thread == Thread::current(), "must be itself");
 651   thread->check_and_handle_async_exceptions();
 652 }
 653 
 654 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 655   JNIWrapper("ExceptionOccurred");
 656 
 657   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 658 
 659   jni_check_async_exceptions(thread);
 660   oop exception = thread->pending_exception();
 661   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 662 
 663   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 664   return ret;
 665 JNI_END
 666 
 667 
 668 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 669   JNIWrapper("ExceptionDescribe");
 670 
 671   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 672 
 673   if (thread->has_pending_exception()) {
 674     Handle ex(thread, thread->pending_exception());
 675     thread->clear_pending_exception();
 676     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 677       // Don't print anything if we are being killed.
 678     } else {
 679       jio_fprintf(defaultStream::error_stream(), "Exception ");
 680       if (thread != NULL && thread->threadObj() != NULL) {
 681         ResourceMark rm(THREAD);
 682         jio_fprintf(defaultStream::error_stream(),
 683         "in thread \"%s\" ", thread->get_thread_name());
 684       }
 685       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 686         JavaValue result(T_VOID);
 687         JavaCalls::call_virtual(&result,
 688                                 ex,
 689                                 SystemDictionary::Throwable_klass(),
 690                                 vmSymbols::printStackTrace_name(),
 691                                 vmSymbols::void_method_signature(),
 692                                 THREAD);
 693         // If an exception is thrown in the call it gets thrown away. Not much
 694         // we can do with it. The native code that calls this, does not check
 695         // for the exception - hence, it might still be in the thread when DestroyVM gets
 696         // called, potentially causing a few asserts to trigger - since no pending exception
 697         // is expected.
 698         CLEAR_PENDING_EXCEPTION;
 699       } else {
 700         ResourceMark rm(THREAD);
 701         jio_fprintf(defaultStream::error_stream(),
 702         ". Uncaught exception of type %s.",
 703         ex->klass()->external_name());
 704       }
 705     }
 706   }
 707 
 708   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 709 JNI_END
 710 
 711 
 712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 713   JNIWrapper("ExceptionClear");
 714 
 715   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 716 
 717   // The jni code might be using this API to clear java thrown exception.
 718   // So just mark jvmti thread exception state as exception caught.
 719   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 720   if (state != NULL && state->is_exception_detected()) {
 721     state->set_exception_caught();
 722   }
 723   thread->clear_pending_exception();
 724 
 725   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 726 JNI_END
 727 
 728 
 729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 730   JNIWrapper("FatalError");
 731 
 732   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 733 
 734   tty->print_cr("FATAL ERROR in native method: %s", msg);
 735   thread->print_stack();
 736   os::abort(); // Dump core and abort
 737 JNI_END
 738 
 739 
 740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 741   JNIWrapper("PushLocalFrame");
 742 
 743   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 744 
 745   //%note jni_11
 746   if (capacity < 0 ||
 747       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 748     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 749     return JNI_ERR;
 750   }
 751   JNIHandleBlock* old_handles = thread->active_handles();
 752   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 753   assert(new_handles != NULL, "should not be NULL");
 754   new_handles->set_pop_frame_link(old_handles);
 755   thread->set_active_handles(new_handles);
 756   jint ret = JNI_OK;
 757   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 758   return ret;
 759 JNI_END
 760 
 761 
 762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 763   JNIWrapper("PopLocalFrame");
 764 
 765   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 766 
 767   //%note jni_11
 768   Handle result_handle(thread, JNIHandles::resolve(result));
 769   JNIHandleBlock* old_handles = thread->active_handles();
 770   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 771   if (new_handles != NULL) {
 772     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 773     // This way code will still work if PopLocalFrame is called without a corresponding
 774     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 775     // the release_block call will release the blocks.
 776     thread->set_active_handles(new_handles);
 777     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 778     JNIHandleBlock::release_block(old_handles, thread); // may block
 779     result = JNIHandles::make_local(thread, result_handle());
 780   }
 781   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 782   return result;
 783 JNI_END
 784 
 785 
 786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 787   JNIWrapper("NewGlobalRef");
 788 
 789   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 790 
 791   Handle ref_handle(thread, JNIHandles::resolve(ref));
 792   jobject ret = JNIHandles::make_global(ref_handle);
 793 
 794   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 795   return ret;
 796 JNI_END
 797 
 798 // Must be JNI_ENTRY (with HandleMark)
 799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 800   JNIWrapper("DeleteGlobalRef");
 801 
 802   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 803 
 804   JNIHandles::destroy_global(ref);
 805 
 806   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 807 JNI_END
 808 
 809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 810   JNIWrapper("DeleteLocalRef");
 811 
 812   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 813 
 814   JNIHandles::destroy_local(obj);
 815 
 816   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 817 JNI_END
 818 
 819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 820   JNIWrapper("IsSameObject");
 821 
 822   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 823 
 824   oop a = JNIHandles::resolve(r1);
 825   oop b = JNIHandles::resolve(r2);
 826   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
 827 
 828   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 829   return ret;
 830 JNI_END
 831 
 832 
 833 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 834   JNIWrapper("NewLocalRef");
 835 
 836   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 837 
 838   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 839 
 840   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 841   return ret;
 842 JNI_END
 843 
 844 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 845   JNIWrapper("EnsureLocalCapacity");
 846 
 847   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 848 
 849   jint ret;
 850   if (capacity >= 0 &&
 851       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 852     ret = JNI_OK;
 853   } else {
 854     ret = JNI_ERR;
 855   }
 856 
 857   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 858   return ret;
 859 JNI_END
 860 
 861 // Return the Handle Type
 862 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 863   JNIWrapper("GetObjectRefType");
 864 
 865   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 866 
 867   jobjectRefType ret;
 868   if (JNIHandles::is_local_handle(thread, obj) ||
 869       JNIHandles::is_frame_handle(thread, obj))
 870     ret = JNILocalRefType;
 871   else if (JNIHandles::is_global_handle(obj))
 872     ret = JNIGlobalRefType;
 873   else if (JNIHandles::is_weak_global_handle(obj))
 874     ret = JNIWeakGlobalRefType;
 875   else
 876     ret = JNIInvalidRefType;
 877 
 878   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 879   return ret;
 880 JNI_END
 881 
 882 
 883 class JNI_ArgumentPusher : public SignatureIterator {
 884  protected:
 885   JavaCallArguments*  _arguments;
 886 
 887   virtual void get_bool   () = 0;
 888   virtual void get_char   () = 0;
 889   virtual void get_short  () = 0;
 890   virtual void get_byte   () = 0;
 891   virtual void get_int    () = 0;
 892   virtual void get_long   () = 0;
 893   virtual void get_float  () = 0;
 894   virtual void get_double () = 0;
 895   virtual void get_object () = 0;
 896 
 897   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 898     this->_return_type = T_ILLEGAL;
 899     _arguments = NULL;
 900   }
 901 
 902  public:
 903   virtual void iterate( uint64_t fingerprint ) = 0;
 904 
 905   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 906 
 907   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 908   inline void do_char()                     { if (!is_return_type()) get_char();   }
 909   inline void do_short()                    { if (!is_return_type()) get_short();  }
 910   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 911   inline void do_int()                      { if (!is_return_type()) get_int();    }
 912   inline void do_long()                     { if (!is_return_type()) get_long();   }
 913   inline void do_float()                    { if (!is_return_type()) get_float();  }
 914   inline void do_double()                   { if (!is_return_type()) get_double(); }
 915   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 916   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 917   inline void do_void()                     { }
 918 
 919   JavaCallArguments* arguments()     { return _arguments; }
 920   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 921 };
 922 
 923 
 924 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 925  protected:
 926   va_list _ap;
 927 
 928   inline void get_bool()   {
 929     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 930     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 931     // TemplateInterpreterGenerator::generate_result_handler_for and
 932     // SharedRuntime::generate_native_wrapper.
 933     jboolean b = va_arg(_ap, jint);
 934     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
 935   }
 936   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
 937   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
 938   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
 939   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }
 940 
 941   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 942 
 943   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }
 944   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
 945   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
 946   inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
 947 
 948   inline void set_ap(va_list rap) {
 949     va_copy(_ap, rap);
 950   }
 951 
 952  public:
 953   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 954        : JNI_ArgumentPusher(signature) {
 955     set_ap(rap);
 956   }
 957   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 958       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 959     set_ap(rap);
 960   }
 961 
 962   // Optimized path if we have the bitvector form of signature
 963   void iterate( uint64_t fingerprint ) {
 964     if (fingerprint == (uint64_t)CONST64(-1)) {
 965       SignatureIterator::iterate(); // Must be too many arguments
 966     } else {
 967       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 968                                   result_feature_mask);
 969 
 970       assert(fingerprint, "Fingerprint should not be 0");
 971       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 972       while ( 1 ) {
 973         switch ( fingerprint & parameter_feature_mask ) {
 974           case bool_parm:
 975             get_bool();
 976             break;
 977           case char_parm:
 978             get_char();
 979             break;
 980           case short_parm:
 981             get_short();
 982             break;
 983           case byte_parm:
 984             get_byte();
 985             break;
 986           case int_parm:
 987             get_int();
 988             break;
 989           case obj_parm:
 990             get_object();
 991             break;
 992           case long_parm:
 993             get_long();
 994             break;
 995           case float_parm:
 996             get_float();
 997             break;
 998           case double_parm:
 999             get_double();
1000             break;
1001           case done_parm:
1002             return;
1003             break;
1004           default:
1005             ShouldNotReachHere();
1006             break;
1007         }
1008         fingerprint >>= parameter_feature_size;
1009       }
1010     }
1011   }
1012 };
1013 
1014 
1015 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1016  protected:
1017   const jvalue *_ap;
1018 
1019   inline void get_bool()   {
1020     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1021     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
1022     // TemplateInterpreterGenerator::generate_result_handler_for and
1023     // SharedRuntime::generate_native_wrapper.
1024     jboolean b = (_ap++)->z;
1025     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1026   }
1027   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1028   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1029   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1030   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1031 
1032   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1033   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1034   inline void get_double() { _arguments->push_double((_ap++)->d);}
1035   inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1036 
1037   inline void set_ap(const jvalue *rap) { _ap = rap; }
1038 
1039  public:
1040   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1041        : JNI_ArgumentPusher(signature) {
1042     set_ap(rap);
1043   }
1044   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1045       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1046     set_ap(rap);
1047   }
1048 
1049   // Optimized path if we have the bitvector form of signature
1050   void iterate( uint64_t fingerprint ) {
1051     if (fingerprint == (uint64_t)CONST64(-1)) {
1052       SignatureIterator::iterate(); // Must be too many arguments
1053     } else {
1054       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1055                                   result_feature_mask);
1056       assert(fingerprint, "Fingerprint should not be 0");
1057       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1058       while ( 1 ) {
1059         switch ( fingerprint & parameter_feature_mask ) {
1060           case bool_parm:
1061             get_bool();
1062             break;
1063           case char_parm:
1064             get_char();
1065             break;
1066           case short_parm:
1067             get_short();
1068             break;
1069           case byte_parm:
1070             get_byte();
1071             break;
1072           case int_parm:
1073             get_int();
1074             break;
1075           case obj_parm:
1076             get_object();
1077             break;
1078           case long_parm:
1079             get_long();
1080             break;
1081           case float_parm:
1082             get_float();
1083             break;
1084           case double_parm:
1085             get_double();
1086             break;
1087           case done_parm:
1088             return;
1089             break;
1090           default:
1091             ShouldNotReachHere();
1092             break;
1093         }
1094         fingerprint >>= parameter_feature_size;
1095       }
1096     }
1097   }
1098 };
1099 
1100 
1101 enum JNICallType {
1102   JNI_STATIC,
1103   JNI_VIRTUAL,
1104   JNI_NONVIRTUAL
1105 };
1106 
1107 
1108 
1109 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1110   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1111 
1112   // Create object to hold arguments for the JavaCall, and associate it with
1113   // the jni parser
1114   ResourceMark rm(THREAD);
1115   int number_of_parameters = method->size_of_parameters();
1116   JavaCallArguments java_args(number_of_parameters);
1117   args->set_java_argument_object(&java_args);
1118 
1119   assert(method->is_static(), "method should be static");
1120 
1121   // Fill out JavaCallArguments object
1122   args->iterate( Fingerprinter(method).fingerprint() );
1123   // Initialize result type
1124   result->set_type(args->get_ret_type());
1125 
1126   // Invoke the method. Result is returned as oop.
1127   JavaCalls::call(result, method, &java_args, CHECK);
1128 
1129   // Convert result
1130   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1131     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1132   }
1133 }
1134 
1135 
1136 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1137   oop recv = JNIHandles::resolve(receiver);
1138   if (recv == NULL) {
1139     THROW(vmSymbols::java_lang_NullPointerException());
1140   }
1141   Handle h_recv(THREAD, recv);
1142 
1143   int number_of_parameters;
1144   Method* selected_method;
1145   {
1146     Method* m = Method::resolve_jmethod_id(method_id);
1147     number_of_parameters = m->size_of_parameters();
1148     Klass* holder = m->method_holder();
1149     if (call_type != JNI_VIRTUAL) {
1150         selected_method = m;
1151     } else if (!m->has_itable_index()) {
1152       // non-interface call -- for that little speed boost, don't handlize
1153       debug_only(NoSafepointVerifier nosafepoint;)
1154       // jni_GetMethodID makes sure class is linked and initialized
1155       // so m should have a valid vtable index.
1156       assert(m->valid_vtable_index(), "no valid vtable index");
1157       int vtbl_index = m->vtable_index();
1158       if (vtbl_index != Method::nonvirtual_vtable_index) {
1159         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1160       } else {
1161         // final method
1162         selected_method = m;
1163       }
1164     } else {
1165       // interface call
1166       int itbl_index = m->itable_index();
1167       Klass* k = h_recv->klass();
1168       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1169     }
1170   }
1171 
1172   methodHandle method(THREAD, selected_method);
1173 
1174   // Create object to hold arguments for the JavaCall, and associate it with
1175   // the jni parser
1176   ResourceMark rm(THREAD);
1177   JavaCallArguments java_args(number_of_parameters);
1178   args->set_java_argument_object(&java_args);
1179 
1180   // handle arguments
1181   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1182   args->push_receiver(h_recv); // Push jobject handle
1183 
1184   // Fill out JavaCallArguments object
1185   args->iterate( Fingerprinter(method).fingerprint() );
1186   // Initialize result type
1187   result->set_type(args->get_ret_type());
1188 
1189   // Invoke the method. Result is returned as oop.
1190   JavaCalls::call(result, method, &java_args, CHECK);
1191 
1192   // Convert result
1193   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1194     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1195   }
1196 }
1197 
1198 
1199 static instanceOop alloc_object(jclass clazz, TRAPS) {
1200   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1201   if (k == NULL) {
1202     ResourceMark rm(THREAD);
1203     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1204   }
1205   k->check_valid_for_instantiation(false, CHECK_NULL);
1206   k->initialize(CHECK_NULL);
1207   instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1208   return ih;
1209 }
1210 
1211 DT_RETURN_MARK_DECL(AllocObject, jobject
1212                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1213 
1214 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1215   JNIWrapper("AllocObject");
1216 
1217   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1218 
1219   jobject ret = NULL;
1220   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1221 
1222   instanceOop i = alloc_object(clazz, CHECK_NULL);
1223   ret = JNIHandles::make_local(env, i);
1224   return ret;
1225 JNI_END
1226 
1227 DT_RETURN_MARK_DECL(NewObjectA, jobject
1228                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1229 
1230 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1231   JNIWrapper("NewObjectA");
1232 
1233   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1234 
1235   jobject obj = NULL;
1236   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1237 
1238   instanceOop i = alloc_object(clazz, CHECK_NULL);
1239   obj = JNIHandles::make_local(env, i);
1240   JavaValue jvalue(T_VOID);
1241   JNI_ArgumentPusherArray ap(methodID, args);
1242   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1243   return obj;
1244 JNI_END
1245 
1246 
1247 DT_RETURN_MARK_DECL(NewObjectV, jobject
1248                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1249 
1250 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1251   JNIWrapper("NewObjectV");
1252 
1253   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1254 
1255   jobject obj = NULL;
1256   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1257 
1258   instanceOop i = alloc_object(clazz, CHECK_NULL);
1259   obj = JNIHandles::make_local(env, i);
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   return obj;
1264 JNI_END
1265 
1266 
1267 DT_RETURN_MARK_DECL(NewObject, jobject
1268                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1269 
1270 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1271   JNIWrapper("NewObject");
1272 
1273   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1274 
1275   jobject obj = NULL;
1276   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1277 
1278   instanceOop i = alloc_object(clazz, CHECK_NULL);
1279   obj = JNIHandles::make_local(env, i);
1280   va_list args;
1281   va_start(args, methodID);
1282   JavaValue jvalue(T_VOID);
1283   JNI_ArgumentPusherVaArg ap(methodID, args);
1284   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1285   va_end(args);
1286   return obj;
1287 JNI_END
1288 
1289 
1290 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1291   JNIWrapper("GetObjectClass");
1292 
1293   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1294 
1295   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1296   jclass ret =
1297     (jclass) JNIHandles::make_local(env, k->java_mirror());
1298 
1299   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1300   return ret;
1301 JNI_END
1302 
1303 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1304   JNIWrapper("IsInstanceOf");
1305 
1306   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1307 
1308   jboolean ret = JNI_TRUE;
1309   if (obj != NULL) {
1310     ret = JNI_FALSE;
1311     Klass* k = java_lang_Class::as_Klass(
1312       JNIHandles::resolve_non_null(clazz));
1313     if (k != NULL) {
1314       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1315     }
1316   }
1317 
1318   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1319   return ret;
1320 JNI_END
1321 
1322 
1323 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1324                                const char *sig, bool is_static, TRAPS) {
1325   // %%%% This code should probably just call into a method in the LinkResolver
1326   //
1327   // The class should have been loaded (we have an instance of the class
1328   // passed in) so the method and signature should already be in the symbol
1329   // table.  If they're not there, the method doesn't exist.
1330   const char *name_to_probe = (name_str == NULL)
1331                         ? vmSymbols::object_initializer_name()->as_C_string()
1332                         : name_str;
1333   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1334   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1335 
1336   if (name == NULL || signature == NULL) {
1337     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1338   }
1339 
1340   // Throw a NoSuchMethodError exception if we have an instance of a
1341   // primitive java.lang.Class
1342   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1343     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1344   }
1345 
1346   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1347 
1348   // Make sure class is linked and initialized before handing id's out to
1349   // Method*s.
1350   klass->initialize(CHECK_NULL);
1351 
1352   Method* m;
1353   if (name == vmSymbols::object_initializer_name() ||
1354       name == vmSymbols::class_initializer_name()) {
1355     // Never search superclasses for constructors
1356     if (klass->is_instance_klass()) {
1357       m = InstanceKlass::cast(klass)->find_method(name, signature);
1358     } else {
1359       m = NULL;
1360     }
1361   } else {
1362     m = klass->lookup_method(name, signature);
1363     if (m == NULL &&  klass->is_instance_klass()) {
1364       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1365     }
1366   }
1367   if (m == NULL || (m->is_static() != is_static)) {
1368     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1369   }
1370   return m->jmethod_id();
1371 }
1372 
1373 
1374 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1375           const char *name, const char *sig))
1376   JNIWrapper("GetMethodID");
1377   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1378   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1379   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1380   return ret;
1381 JNI_END
1382 
1383 
1384 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1385           const char *name, const char *sig))
1386   JNIWrapper("GetStaticMethodID");
1387   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1388   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1389   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1390   return ret;
1391 JNI_END
1392 
1393 
1394 
1395 //
1396 // Calling Methods
1397 //
1398 
1399 
1400 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1401                           , EntryProbe, ReturnProbe)    \
1402 \
1403   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1404                           , ReturnProbe);                          \
1405 \
1406 JNI_ENTRY(ResultType, \
1407           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1408   JNIWrapper("Call" XSTR(Result) "Method"); \
1409 \
1410   EntryProbe; \
1411   ResultType ret = 0;\
1412   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1413                      (const ResultType&)ret);\
1414 \
1415   va_list args; \
1416   va_start(args, methodID); \
1417   JavaValue jvalue(Tag); \
1418   JNI_ArgumentPusherVaArg ap(methodID, args); \
1419   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1420   va_end(args); \
1421   ret = jvalue.get_##ResultType(); \
1422   return ret;\
1423 JNI_END
1424 
1425 // the runtime type of subword integral basic types is integer
1426 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1427                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1429 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1430                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1433                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1436                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1438 
1439 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1440                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1442 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1443                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1445 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1446                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1448 // Float and double probes don't return value because dtrace doesn't currently support it
1449 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1450                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1451                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1452 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1453                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1454                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1455 
1456 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1457                           , EntryProbe, ReturnProbe)    \
1458 \
1459   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1460                           , ReturnProbe);                          \
1461 \
1462 JNI_ENTRY(ResultType, \
1463           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1464   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1465 \
1466   EntryProbe;\
1467   ResultType ret = 0;\
1468   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1469                      (const ResultType&)ret);\
1470 \
1471   JavaValue jvalue(Tag); \
1472   JNI_ArgumentPusherVaArg ap(methodID, args); \
1473   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1474   ret = jvalue.get_##ResultType(); \
1475   return ret;\
1476 JNI_END
1477 
1478 // the runtime type of subword integral basic types is integer
1479 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1480                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1482 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1483                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1486                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1489                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1491 
1492 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1493                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1495 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1496                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1498 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1499                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1501 // Float and double probes don't return value because dtrace doesn't currently support it
1502 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1503                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1504                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1505 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1506                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1507                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1508 
1509 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1510                           , EntryProbe, ReturnProbe)    \
1511 \
1512   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1513                           , ReturnProbe);                          \
1514 \
1515 JNI_ENTRY(ResultType, \
1516           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1517   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1518   EntryProbe; \
1519   ResultType ret = 0;\
1520   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1521                      (const ResultType&)ret);\
1522 \
1523   JavaValue jvalue(Tag); \
1524   JNI_ArgumentPusherArray ap(methodID, args); \
1525   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1526   ret = jvalue.get_##ResultType(); \
1527   return ret;\
1528 JNI_END
1529 
1530 // the runtime type of subword integral basic types is integer
1531 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1532                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1534 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1535                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1538                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1541                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1543 
1544 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1545                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1547 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1548                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1550 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1551                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1553 // Float and double probes don't return value because dtrace doesn't currently support it
1554 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1555                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1556                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1557 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1558                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1559                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1560 
1561 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1562 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1563 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1564 
1565 
1566 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1567   JNIWrapper("CallVoidMethod");
1568   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1569   DT_VOID_RETURN_MARK(CallVoidMethod);
1570 
1571   va_list args;
1572   va_start(args, methodID);
1573   JavaValue jvalue(T_VOID);
1574   JNI_ArgumentPusherVaArg ap(methodID, args);
1575   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1576   va_end(args);
1577 JNI_END
1578 
1579 
1580 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1581   JNIWrapper("CallVoidMethodV");
1582   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1583   DT_VOID_RETURN_MARK(CallVoidMethodV);
1584 
1585   JavaValue jvalue(T_VOID);
1586   JNI_ArgumentPusherVaArg ap(methodID, args);
1587   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1588 JNI_END
1589 
1590 
1591 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1592   JNIWrapper("CallVoidMethodA");
1593   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1594   DT_VOID_RETURN_MARK(CallVoidMethodA);
1595 
1596   JavaValue jvalue(T_VOID);
1597   JNI_ArgumentPusherArray ap(methodID, args);
1598   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1599 JNI_END
1600 
1601 
1602 
1603 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1604                                     , EntryProbe, ReturnProbe)      \
1605 \
1606   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1607                           , ReturnProbe);\
1608 \
1609 JNI_ENTRY(ResultType, \
1610           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1611   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1612 \
1613   EntryProbe;\
1614   ResultType ret;\
1615   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1616                      (const ResultType&)ret);\
1617 \
1618   va_list args; \
1619   va_start(args, methodID); \
1620   JavaValue jvalue(Tag); \
1621   JNI_ArgumentPusherVaArg ap(methodID, args); \
1622   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1623   va_end(args); \
1624   ret = jvalue.get_##ResultType(); \
1625   return ret;\
1626 JNI_END
1627 
1628 // the runtime type of subword integral basic types is integer
1629 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1630                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1632 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1633                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1635 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1636                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1639                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1641 
1642 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1643                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1645 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1646                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1649                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 // Float and double probes don't return value because dtrace doesn't currently support it
1651                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1652 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1653                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1654                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1655 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1656                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1657                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1658 
1659 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1660                                     , EntryProbe, ReturnProbe)      \
1661 \
1662   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1663                           , ReturnProbe);\
1664 \
1665 JNI_ENTRY(ResultType, \
1666           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1667   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1668 \
1669   EntryProbe;\
1670   ResultType ret;\
1671   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1672                      (const ResultType&)ret);\
1673 \
1674   JavaValue jvalue(Tag); \
1675   JNI_ArgumentPusherVaArg ap(methodID, args); \
1676   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1677   ret = jvalue.get_##ResultType(); \
1678   return ret;\
1679 JNI_END
1680 
1681 // the runtime type of subword integral basic types is integer
1682 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1683                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1685 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1686                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1688 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1689                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1692                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1694 
1695 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1696                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1698 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1699                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1702                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 // Float and double probes don't return value because dtrace doesn't currently support it
1704                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1705 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1706                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1707                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1708 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1709                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1710                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1711 
1712 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1713                                     , EntryProbe, ReturnProbe)      \
1714 \
1715   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1716                           , ReturnProbe);\
1717 \
1718 JNI_ENTRY(ResultType, \
1719           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1720   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1721 \
1722   EntryProbe;\
1723   ResultType ret;\
1724   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1725                      (const ResultType&)ret);\
1726 \
1727   JavaValue jvalue(Tag); \
1728   JNI_ArgumentPusherArray ap(methodID, args); \
1729   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1730   ret = jvalue.get_##ResultType(); \
1731   return ret;\
1732 JNI_END
1733 
1734 // the runtime type of subword integral basic types is integer
1735 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1736                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1738 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1739                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1741 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1742                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1745                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1747 
1748 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1749                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1751 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1752                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1755                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 // Float and double probes don't return value because dtrace doesn't currently support it
1757                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1758 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1759                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1760                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1761 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1762                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1763                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1764 
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1766                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1768                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1770                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1771 
1772 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1773   JNIWrapper("CallNonvirtualVoidMethod");
1774 
1775   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1776   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1777 
1778   va_list args;
1779   va_start(args, methodID);
1780   JavaValue jvalue(T_VOID);
1781   JNI_ArgumentPusherVaArg ap(methodID, args);
1782   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1783   va_end(args);
1784 JNI_END
1785 
1786 
1787 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1788   JNIWrapper("CallNonvirtualVoidMethodV");
1789 
1790   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1791                env, obj, cls, (uintptr_t) methodID);
1792   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1793 
1794   JavaValue jvalue(T_VOID);
1795   JNI_ArgumentPusherVaArg ap(methodID, args);
1796   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1797 JNI_END
1798 
1799 
1800 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1801   JNIWrapper("CallNonvirtualVoidMethodA");
1802   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1803                 env, obj, cls, (uintptr_t) methodID);
1804   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1805   JavaValue jvalue(T_VOID);
1806   JNI_ArgumentPusherArray ap(methodID, args);
1807   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1808 JNI_END
1809 
1810 
1811 
1812 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1813                                 , EntryProbe, ResultProbe) \
1814 \
1815   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1816                           , ResultProbe);                               \
1817 \
1818 JNI_ENTRY(ResultType, \
1819           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1820   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1821 \
1822   EntryProbe; \
1823   ResultType ret = 0;\
1824   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1825                      (const ResultType&)ret);\
1826 \
1827   va_list args; \
1828   va_start(args, methodID); \
1829   JavaValue jvalue(Tag); \
1830   JNI_ArgumentPusherVaArg ap(methodID, args); \
1831   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1832   va_end(args); \
1833   ret = jvalue.get_##ResultType(); \
1834   return ret;\
1835 JNI_END
1836 
1837 // the runtime type of subword integral basic types is integer
1838 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1839                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1841 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1842                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1844 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1845                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1848                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1850 
1851 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1852                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1854 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1855                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1857 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1858                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1860 // Float and double probes don't return value because dtrace doesn't currently support it
1861 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1862                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1863                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1864 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1865                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1866                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1867 
1868 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1869                                 , EntryProbe, ResultProbe) \
1870 \
1871   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1872                           , ResultProbe);                               \
1873 \
1874 JNI_ENTRY(ResultType, \
1875           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1876   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1877 \
1878   EntryProbe; \
1879   ResultType ret = 0;\
1880   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1881                      (const ResultType&)ret);\
1882 \
1883   JavaValue jvalue(Tag); \
1884   JNI_ArgumentPusherVaArg ap(methodID, args); \
1885   /* Make sure class is initialized before trying to invoke its method */ \
1886   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1887   k->initialize(CHECK_0); \
1888   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1889   va_end(args); \
1890   ret = jvalue.get_##ResultType(); \
1891   return ret;\
1892 JNI_END
1893 
1894 // the runtime type of subword integral basic types is integer
1895 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1896                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1898 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1899                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1901 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1902                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1905                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1907 
1908 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1909                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1911 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1912                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1914 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1915                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1917 // Float and double probes don't return value because dtrace doesn't currently support it
1918 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1919                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1920                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1921 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1922                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1923                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1924 
1925 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1926                                 , EntryProbe, ResultProbe) \
1927 \
1928   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1929                           , ResultProbe);                               \
1930 \
1931 JNI_ENTRY(ResultType, \
1932           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1933   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1934 \
1935   EntryProbe; \
1936   ResultType ret = 0;\
1937   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1938                      (const ResultType&)ret);\
1939 \
1940   JavaValue jvalue(Tag); \
1941   JNI_ArgumentPusherArray ap(methodID, args); \
1942   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1943   ret = jvalue.get_##ResultType(); \
1944   return ret;\
1945 JNI_END
1946 
1947 // the runtime type of subword integral basic types is integer
1948 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1949                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1951 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1952                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1954 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1955                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1958                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1960 
1961 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1962                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1964 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1965                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1967 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1968                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1970 // Float and double probes don't return value because dtrace doesn't currently support it
1971 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1972                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1973                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1974 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1975                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1976                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1977 
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1979                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1981                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1983                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1984 
1985 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1986   JNIWrapper("CallStaticVoidMethod");
1987   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1988   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1989 
1990   va_list args;
1991   va_start(args, methodID);
1992   JavaValue jvalue(T_VOID);
1993   JNI_ArgumentPusherVaArg ap(methodID, args);
1994   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1995   va_end(args);
1996 JNI_END
1997 
1998 
1999 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2000   JNIWrapper("CallStaticVoidMethodV");
2001   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2002   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2003 
2004   JavaValue jvalue(T_VOID);
2005   JNI_ArgumentPusherVaArg ap(methodID, args);
2006   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2007 JNI_END
2008 
2009 
2010 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2011   JNIWrapper("CallStaticVoidMethodA");
2012   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2013   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2014 
2015   JavaValue jvalue(T_VOID);
2016   JNI_ArgumentPusherArray ap(methodID, args);
2017   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2018 JNI_END
2019 
2020 
2021 //
2022 // Accessing Fields
2023 //
2024 
2025 
2026 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2027                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2028 
2029 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2030           const char *name, const char *sig))
2031   JNIWrapper("GetFieldID");
2032   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2033   jfieldID ret = 0;
2034   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2035 
2036   // The class should have been loaded (we have an instance of the class
2037   // passed in) so the field and signature should already be in the symbol
2038   // table.  If they're not there, the field doesn't exist.
2039   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2040   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2041   if (fieldname == NULL || signame == NULL) {
2042     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2043   }
2044   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2045   // Make sure class is initialized before handing id's out to fields
2046   k->initialize(CHECK_NULL);
2047 
2048   fieldDescriptor fd;
2049   if (!k->is_instance_klass() ||
2050       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2051     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2052   }
2053 
2054   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2055   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2056   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2057   return ret;
2058 JNI_END
2059 
2060 
2061 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2062   JNIWrapper("GetObjectField");
2063   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2064   oop o = JNIHandles::resolve_non_null(obj);
2065   Klass* k = o->klass();
2066   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2067   // Keep JVMTI addition small and only check enabled flag here.
2068   // jni_GetField_probe() assumes that is okay to create handles.
2069   if (JvmtiExport::should_post_field_access()) {
2070     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2071   }
2072   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2073 #if INCLUDE_ALL_GCS
2074   // If G1 is enabled and we are accessing the value of the referent
2075   // field in a reference object then we need to register a non-null
2076   // referent with the SATB barrier.
2077   if (UseG1GC) {
2078     bool needs_barrier = false;
2079 
2080     if (ret != NULL &&
2081         offset == java_lang_ref_Reference::referent_offset &&
2082         InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2083       assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2084       needs_barrier = true;
2085     }
2086 
2087     if (needs_barrier) {
2088       oop referent = JNIHandles::resolve(ret);
2089       G1SATBCardTableModRefBS::enqueue(referent);
2090     }
2091   }
2092 #endif // INCLUDE_ALL_GCS
2093 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2094   return ret;
2095 JNI_END
2096 
2097 
2098 
2099 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2100   , EntryProbe, ReturnProbe) \
2101 \
2102   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2103   , ReturnProbe); \
2104 \
2105 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2106   JNIWrapper("Get" XSTR(Result) "Field"); \
2107 \
2108   EntryProbe; \
2109   Return ret = 0;\
2110   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2111 \
2112   oop o = JNIHandles::resolve_non_null(obj); \
2113   Klass* k = o->klass(); \
2114   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2115   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2116   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2117   /* and creates a ResetNoHandleMark.                                   */ \
2118   if (JvmtiExport::should_post_field_access()) { \
2119     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2120   } \
2121   ret = o->Fieldname##_field(offset); \
2122   return ret; \
2123 JNI_END
2124 
2125 DEFINE_GETFIELD(jboolean, bool,   Boolean
2126                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2128 DEFINE_GETFIELD(jbyte,    byte,   Byte
2129                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jchar,    char,   Char
2132                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jshort,   short,  Short
2135                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2137 DEFINE_GETFIELD(jint,     int,    Int
2138                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2140 DEFINE_GETFIELD(jlong,    long,   Long
2141                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2142                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2143 // Float and double probes don't return value because dtrace doesn't currently support it
2144 DEFINE_GETFIELD(jfloat,   float,  Float
2145                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2146                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2147 DEFINE_GETFIELD(jdouble,  double, Double
2148                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2149                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2150 
2151 address jni_GetBooleanField_addr() {
2152   return (address)jni_GetBooleanField;
2153 }
2154 address jni_GetByteField_addr() {
2155   return (address)jni_GetByteField;
2156 }
2157 address jni_GetCharField_addr() {
2158   return (address)jni_GetCharField;
2159 }
2160 address jni_GetShortField_addr() {
2161   return (address)jni_GetShortField;
2162 }
2163 address jni_GetIntField_addr() {
2164   return (address)jni_GetIntField;
2165 }
2166 address jni_GetLongField_addr() {
2167   return (address)jni_GetLongField;
2168 }
2169 address jni_GetFloatField_addr() {
2170   return (address)jni_GetFloatField;
2171 }
2172 address jni_GetDoubleField_addr() {
2173   return (address)jni_GetDoubleField;
2174 }
2175 
2176 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2177   JNIWrapper("SetObjectField");
2178   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2179   oop o = JNIHandles::resolve_non_null(obj);
2180   Klass* k = o->klass();
2181   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2182   // Keep JVMTI addition small and only check enabled flag here.
2183   // jni_SetField_probe_nh() assumes that is not okay to create handles
2184   // and creates a ResetNoHandleMark.
2185   if (JvmtiExport::should_post_field_modification()) {
2186     jvalue field_value;
2187     field_value.l = value;
2188     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2189   }
2190   o->obj_field_put(offset, JNIHandles::resolve(value));
2191   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2192 JNI_END
2193 
2194 
2195 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2196                         , EntryProbe, ReturnProbe) \
2197 \
2198 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2199   JNIWrapper("Set" XSTR(Result) "Field"); \
2200 \
2201   EntryProbe; \
2202 \
2203   oop o = JNIHandles::resolve_non_null(obj); \
2204   Klass* k = o->klass(); \
2205   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2206   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2207   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2208   /* and creates a ResetNoHandleMark.                                   */ \
2209   if (JvmtiExport::should_post_field_modification()) { \
2210     jvalue field_value; \
2211     field_value.unionType = value; \
2212     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2213   } \
2214   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2215   o->Fieldname##_field_put(offset, value); \
2216   ReturnProbe; \
2217 JNI_END
2218 
2219 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2220                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2222 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2223                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2225 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2226                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2228 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2229                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2231 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2232                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2234 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2235                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2236                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2237 // Float and double probes don't return value because dtrace doesn't currently support it
2238 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2239                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2240                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2241 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2242                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2243                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2244 
2245 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2246                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2247 
2248 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2249   JNIWrapper("ToReflectedField");
2250   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2251   jobject ret = NULL;
2252   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2253 
2254   fieldDescriptor fd;
2255   bool found = false;
2256   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2257 
2258   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2259 
2260   if (isStatic) {
2261     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2262     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2263     assert(id->is_static_field_id(), "invalid static field id");
2264     found = id->find_local_field(&fd);
2265   } else {
2266     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2267     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2268     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2269   }
2270   assert(found, "bad fieldID passed into jni_ToReflectedField");
2271   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2272   ret = JNIHandles::make_local(env, reflected);
2273   return ret;
2274 JNI_END
2275 
2276 
2277 //
2278 // Accessing Static Fields
2279 //
2280 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2281                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2282 
2283 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2284           const char *name, const char *sig))
2285   JNIWrapper("GetStaticFieldID");
2286   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2287   jfieldID ret = NULL;
2288   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2289 
2290   // The class should have been loaded (we have an instance of the class
2291   // passed in) so the field and signature should already be in the symbol
2292   // table.  If they're not there, the field doesn't exist.
2293   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2294   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2295   if (fieldname == NULL || signame == NULL) {
2296     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2297   }
2298   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2299   // Make sure class is initialized before handing id's out to static fields
2300   k->initialize(CHECK_NULL);
2301 
2302   fieldDescriptor fd;
2303   if (!k->is_instance_klass() ||
2304       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2305     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2306   }
2307 
2308   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2309   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2310   debug_only(id->set_is_static_field_id();)
2311 
2312   debug_only(id->verify(fd.field_holder()));
2313 
2314   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2315   return ret;
2316 JNI_END
2317 
2318 
2319 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2320   JNIWrapper("GetStaticObjectField");
2321   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2322 #if INCLUDE_JNI_CHECK
2323   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2324 #endif // INCLUDE_JNI_CHECK
2325   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2326   assert(id->is_static_field_id(), "invalid static field id");
2327   // Keep JVMTI addition small and only check enabled flag here.
2328   // jni_GetField_probe() assumes that is okay to create handles.
2329   if (JvmtiExport::should_post_field_access()) {
2330     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2331   }
2332   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2333   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2334   return ret;
2335 JNI_END
2336 
2337 
2338 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2339                               , EntryProbe, ReturnProbe) \
2340 \
2341   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2342                           , ReturnProbe);                                          \
2343 \
2344 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2345   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2346   EntryProbe; \
2347   Return ret = 0;\
2348   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2349                      (const Return&)ret);\
2350   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2351   assert(id->is_static_field_id(), "invalid static field id"); \
2352   /* Keep JVMTI addition small and only check enabled flag here. */ \
2353   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2354   if (JvmtiExport::should_post_field_access()) { \
2355     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2356   } \
2357   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2358   return ret;\
2359 JNI_END
2360 
2361 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2362                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2363 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2364                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2365 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2366                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2367 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2368                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2369 DEFINE_GETSTATICFIELD(jint,     int,    Int
2370                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2371 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2372                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2373 // Float and double probes don't return value because dtrace doesn't currently support it
2374 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2375                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2376 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2377                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2378 
2379 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2380   JNIWrapper("SetStaticObjectField");
2381  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2382   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2383   assert(id->is_static_field_id(), "invalid static field id");
2384   // Keep JVMTI addition small and only check enabled flag here.
2385   // jni_SetField_probe() assumes that is okay to create handles.
2386   if (JvmtiExport::should_post_field_modification()) {
2387     jvalue field_value;
2388     field_value.l = value;
2389     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2390   }
2391   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2392   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2393 JNI_END
2394 
2395 
2396 
2397 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2398                               , EntryProbe, ReturnProbe) \
2399 \
2400 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2401   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2402   EntryProbe; \
2403 \
2404   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2405   assert(id->is_static_field_id(), "invalid static field id"); \
2406   /* Keep JVMTI addition small and only check enabled flag here. */ \
2407   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2408   if (JvmtiExport::should_post_field_modification()) { \
2409     jvalue field_value; \
2410     field_value.unionType = value; \
2411     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2412   } \
2413   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2414   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2415   ReturnProbe;\
2416 JNI_END
2417 
2418 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2419                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2420                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2422                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2425                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2428                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2430 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2431                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2432                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2433 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2434                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2435                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2436 // Float and double probes don't return value because dtrace doesn't currently support it
2437 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2438                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2439                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2440 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2441                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2442                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2443 
2444 //
2445 // String Operations
2446 //
2447 
2448 // Unicode Interface
2449 
2450 DT_RETURN_MARK_DECL(NewString, jstring
2451                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2452 
2453 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2454   JNIWrapper("NewString");
2455  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2456   jstring ret = NULL;
2457   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2458   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2459   ret = (jstring) JNIHandles::make_local(env, string);
2460   return ret;
2461 JNI_END
2462 
2463 
2464 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2465   JNIWrapper("GetStringLength");
2466   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2467   jsize ret = 0;
2468   oop s = JNIHandles::resolve_non_null(string);
2469   if (java_lang_String::value(s) != NULL) {
2470     ret = java_lang_String::length(s);
2471   }
2472  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2473   return ret;
2474 JNI_END
2475 
2476 
2477 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2478   JNIEnv *env, jstring string, jboolean *isCopy))
2479   JNIWrapper("GetStringChars");
2480  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2481   jchar* buf = NULL;
2482   oop s = JNIHandles::resolve_non_null(string);
2483   typeArrayOop s_value = java_lang_String::value(s);
2484   if (s_value != NULL) {
2485     int s_len = java_lang_String::length(s);
2486     bool is_latin1 = java_lang_String::is_latin1(s);
2487     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2488     /* JNI Specification states return NULL on OOM */
2489     if (buf != NULL) {
2490       if (s_len > 0) {
2491         if (!is_latin1) {
2492           memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2493         } else {
2494           for (int i = 0; i < s_len; i++) {
2495             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2496           }
2497         }
2498       }
2499       buf[s_len] = 0;
2500       //%note jni_5
2501       if (isCopy != NULL) {
2502         *isCopy = JNI_TRUE;
2503       }
2504     }
2505   }
2506   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2507   return buf;
2508 JNI_END
2509 
2510 
2511 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2512   JNIWrapper("ReleaseStringChars");
2513   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2514   //%note jni_6
2515   if (chars != NULL) {
2516     // Since String objects are supposed to be immutable, don't copy any
2517     // new data back.  A bad user will have to go after the char array.
2518     FreeHeap((void*) chars);
2519   }
2520   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2521 JNI_END
2522 
2523 
2524 // UTF Interface
2525 
2526 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2527                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2528 
2529 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2530   JNIWrapper("NewStringUTF");
2531   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2532   jstring ret;
2533   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2534 
2535   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2536   ret = (jstring) JNIHandles::make_local(env, result);
2537   return ret;
2538 JNI_END
2539 
2540 
2541 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2542   JNIWrapper("GetStringUTFLength");
2543  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2544   jsize ret = 0;
2545   oop java_string = JNIHandles::resolve_non_null(string);
2546   if (java_lang_String::value(java_string) != NULL) {
2547     ret = java_lang_String::utf8_length(java_string);
2548   }
2549   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2550   return ret;
2551 JNI_END
2552 
2553 
2554 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2555   JNIWrapper("GetStringUTFChars");
2556  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2557   char* result = NULL;
2558   oop java_string = JNIHandles::resolve_non_null(string);
2559   if (java_lang_String::value(java_string) != NULL) {
2560     size_t length = java_lang_String::utf8_length(java_string);
2561     /* JNI Specification states return NULL on OOM */
2562     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2563     if (result != NULL) {
2564       java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2565       if (isCopy != NULL) {
2566         *isCopy = JNI_TRUE;
2567       }
2568     }
2569   }
2570  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2571   return result;
2572 JNI_END
2573 
2574 
2575 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2576   JNIWrapper("ReleaseStringUTFChars");
2577  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2578   if (chars != NULL) {
2579     FreeHeap((char*) chars);
2580   }
2581 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2582 JNI_END
2583 
2584 
2585 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2586   JNIWrapper("GetArrayLength");
2587  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2588   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2589   assert(a->is_array(), "must be array");
2590   jsize ret = a->length();
2591  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2592   return ret;
2593 JNI_END
2594 
2595 
2596 //
2597 // Object Array Operations
2598 //
2599 
2600 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2601                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2602 
2603 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2604   JNIWrapper("NewObjectArray");
2605  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2606   jobjectArray ret = NULL;
2607   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2608   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2609   Klass* ak = ek->array_klass(CHECK_NULL);
2610   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2611   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2612   oop initial_value = JNIHandles::resolve(initialElement);
2613   if (initial_value != NULL) {  // array already initialized with NULL
2614     for (int index = 0; index < length; index++) {
2615       result->obj_at_put(index, initial_value);
2616     }
2617   }
2618   ret = (jobjectArray) JNIHandles::make_local(env, result);
2619   return ret;
2620 JNI_END
2621 
2622 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2623                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2624 
2625 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2626   JNIWrapper("GetObjectArrayElement");
2627  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2628   jobject ret = NULL;
2629   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2630   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2631   if (a->is_within_bounds(index)) {
2632     ret = JNIHandles::make_local(env, a->obj_at(index));
2633     return ret;
2634   } else {
2635     char buf[jintAsStringSize];
2636     sprintf(buf, "%d", index);
2637     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2638   }
2639 JNI_END
2640 
2641 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2642                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2643 
2644 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2645   JNIWrapper("SetObjectArrayElement");
2646  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2647   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2648 
2649   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2650   oop v = JNIHandles::resolve(value);
2651   if (a->is_within_bounds(index)) {
2652     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2653       a->obj_at_put(index, v);
2654     } else {
2655       THROW(vmSymbols::java_lang_ArrayStoreException());
2656     }
2657   } else {
2658     char buf[jintAsStringSize];
2659     sprintf(buf, "%d", index);
2660     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2661   }
2662 JNI_END
2663 
2664 
2665 
2666 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2667                               ,EntryProbe,ReturnProbe)  \
2668 \
2669   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2670                       , ReturnProbe); \
2671 \
2672 JNI_ENTRY(Return, \
2673           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2674   JNIWrapper("New" XSTR(Result) "Array"); \
2675   EntryProbe; \
2676   Return ret = NULL;\
2677   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2678 \
2679   oop obj= oopFactory::Allocator(len, CHECK_0); \
2680   ret = (Return) JNIHandles::make_local(env, obj); \
2681   return ret;\
2682 JNI_END
2683 
2684 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2685                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2686                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2687 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2688                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2689                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2690 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2691                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2692                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2693 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2694                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2695                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2696 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2697                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2698                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2699 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2700                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2701                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2702 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float,
2703                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2704                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2705 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2706                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2707                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2708 
2709 // Return an address which will fault if the caller writes to it.
2710 
2711 static char* get_bad_address() {
2712   static char* bad_address = NULL;
2713   if (bad_address == NULL) {
2714     size_t size = os::vm_allocation_granularity();
2715     bad_address = os::reserve_memory(size);
2716     if (bad_address != NULL) {
2717       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2718                          /*is_committed*/false);
2719       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2720     }
2721   }
2722   return bad_address;
2723 }
2724 
2725 
2726 
2727 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2728                                       , EntryProbe, ReturnProbe) \
2729 \
2730 JNI_QUICK_ENTRY(ElementType*, \
2731           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2732   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2733   EntryProbe; \
2734   /* allocate an chunk of memory in c land */ \
2735   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2736   ElementType* result; \
2737   int len = a->length(); \
2738   if (len == 0) { \
2739     /* Empty array: legal but useless, can't return NULL. \
2740      * Return a pointer to something useless. \
2741      * Avoid asserts in typeArrayOop. */ \
2742     result = (ElementType*)get_bad_address(); \
2743   } else { \
2744     /* JNI Specification states return NULL on OOM */                    \
2745     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2746     if (result != NULL) {                                                \
2747       /* copy the array to the c chunk */                                \
2748       memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len);      \
2749       if (isCopy) {                                                      \
2750         *isCopy = JNI_TRUE;                                              \
2751       }                                                                  \
2752     }                                                                    \
2753   } \
2754   ReturnProbe; \
2755   return result; \
2756 JNI_END
2757 
2758 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2759                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2760                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2761 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2762                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2765                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2766                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2767 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2768                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2769                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2770 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2771                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2772                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2774                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2776 // Float and double probes don't return value because dtrace doesn't currently support it
2777 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2778                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2779                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2780 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2781                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2782                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2783 
2784 
2785 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2786                                           , EntryProbe, ReturnProbe);\
2787 \
2788 JNI_QUICK_ENTRY(void, \
2789           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2790                                              ElementType *buf, jint mode)) \
2791   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2792   EntryProbe; \
2793   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2794   int len = a->length(); \
2795   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2796     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2797       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2798     } \
2799     if ((mode == 0) || (mode == JNI_ABORT)) { \
2800       FreeHeap(buf); \
2801     } \
2802   } \
2803   ReturnProbe; \
2804 JNI_END
2805 
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2807                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2808                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2810                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2811                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2813                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2814                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2816                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2817                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2819                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2820                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2821 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2822                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2823                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2824 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2825                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2826                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2827 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2828                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2829                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2830 
2831 
2832 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2833                                     , EntryProbe, ReturnProbe); \
2834   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2835                            , ReturnProbe); \
2836 \
2837 JNI_ENTRY(void, \
2838 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2839              jsize len, ElementType *buf)) \
2840   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2841   EntryProbe; \
2842   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2843   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2844   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2845     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2846   } else { \
2847     if (len > 0) { \
2848       int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2849       memcpy((u_char*) buf, \
2850              (u_char*) src->Tag##_at_addr(start), \
2851              len << sc);                          \
2852     } \
2853   } \
2854 JNI_END
2855 
2856 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2857                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2858                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2859 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2860                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2861                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2862 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2863                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2864                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2865 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2866                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2867                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2868 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2869                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2870                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2871 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2872                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2873                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2874 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2875                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2876                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2877 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2878                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2879                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2880 
2881 
2882 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2883                                     , EntryProbe, ReturnProbe); \
2884   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2885                            ,ReturnProbe);           \
2886 \
2887 JNI_ENTRY(void, \
2888 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2889              jsize len, const ElementType *buf)) \
2890   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2891   EntryProbe; \
2892   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2893   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2894   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2895     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2896   } else { \
2897     if (len > 0) { \
2898       int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2899       memcpy((u_char*) dst->Tag##_at_addr(start), \
2900              (u_char*) buf, \
2901              len << sc);    \
2902     } \
2903   } \
2904 JNI_END
2905 
2906 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2907                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2908                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2909 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2910                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2911                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2912 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2913                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2914                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2915 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2916                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2917                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2918 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2919                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2920                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2921 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2922                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2923                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2924 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2925                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2926                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2927 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2928                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2929                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2930 
2931 
2932 //
2933 // Interception of natives
2934 //
2935 
2936 // The RegisterNatives call being attempted tried to register with a method that
2937 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2938 // to see if the native method is now wrapped with the prefixes.  See the
2939 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2940 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2941 #if INCLUDE_JVMTI
2942   ResourceMark rm(THREAD);
2943   Method* method;
2944   int name_len = name->utf8_length();
2945   char* name_str = name->as_utf8();
2946   int prefix_count;
2947   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2948   for (int i = 0; i < prefix_count; i++) {
2949     char* prefix = prefixes[i];
2950     int prefix_len = (int)strlen(prefix);
2951 
2952     // try adding this prefix to the method name and see if it matches another method name
2953     int trial_len = name_len + prefix_len;
2954     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2955     strcpy(trial_name_str, prefix);
2956     strcat(trial_name_str, name_str);
2957     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2958     if (trial_name == NULL) {
2959       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2960     }
2961     method = k->lookup_method(trial_name, signature);
2962     if (method == NULL) {
2963       continue; // signature doesn't match, try the next prefix
2964     }
2965     if (method->is_native()) {
2966       method->set_is_prefixed_native();
2967       return method; // wahoo, we found a prefixed version of the method, return it
2968     }
2969     // found as non-native, so prefix is good, add it, probably just need more prefixes
2970     name_len = trial_len;
2971     name_str = trial_name_str;
2972   }
2973 #endif // INCLUDE_JVMTI
2974   return NULL; // not found
2975 }
2976 
2977 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2978   Method* method = k->lookup_method(name, signature);
2979   if (method == NULL) {
2980     ResourceMark rm;
2981     stringStream st;
2982     st.print("Method %s name or signature does not match",
2983              Method::name_and_sig_as_C_string(k, name, signature));
2984     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2985   }
2986   if (!method->is_native()) {
2987     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2988     method = find_prefixed_native(k, name, signature, THREAD);
2989     if (method == NULL) {
2990       ResourceMark rm;
2991       stringStream st;
2992       st.print("Method %s is not declared as native",
2993                Method::name_and_sig_as_C_string(k, name, signature));
2994       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2995     }
2996   }
2997 
2998   if (entry != NULL) {
2999     method->set_native_function(entry,
3000       Method::native_bind_event_is_interesting);
3001   } else {
3002     method->clear_native_function();
3003   }
3004   if (PrintJNIResolving) {
3005     ResourceMark rm(THREAD);
3006     tty->print_cr("[Registering JNI native method %s.%s]",
3007       method->method_holder()->external_name(),
3008       method->name()->as_C_string());
3009   }
3010   return true;
3011 }
3012 
3013 DT_RETURN_MARK_DECL(RegisterNatives, jint
3014                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3015 
3016 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3017                                     const JNINativeMethod *methods,
3018                                     jint nMethods))
3019   JNIWrapper("RegisterNatives");
3020   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3021   jint ret = 0;
3022   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3023 
3024   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3025 
3026   for (int index = 0; index < nMethods; index++) {
3027     const char* meth_name = methods[index].name;
3028     const char* meth_sig = methods[index].signature;
3029     int meth_name_len = (int)strlen(meth_name);
3030 
3031     // The class should have been loaded (we have an instance of the class
3032     // passed in) so the method and signature should already be in the symbol
3033     // table.  If they're not there, the method doesn't exist.
3034     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3035     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3036 
3037     if (name == NULL || signature == NULL) {
3038       ResourceMark rm;
3039       stringStream st;
3040       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3041       // Must return negative value on failure
3042       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3043     }
3044 
3045     bool res = register_native(k, name, signature,
3046                                (address) methods[index].fnPtr, THREAD);
3047     if (!res) {
3048       ret = -1;
3049       break;
3050     }
3051   }
3052   return ret;
3053 JNI_END
3054 
3055 
3056 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3057   JNIWrapper("UnregisterNatives");
3058  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3059   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3060   //%note jni_2
3061   if (k->is_instance_klass()) {
3062     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3063       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3064       if (m->is_native()) {
3065         m->clear_native_function();
3066         m->set_signature_handler(NULL);
3067       }
3068     }
3069   }
3070  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3071   return 0;
3072 JNI_END
3073 
3074 //
3075 // Monitor functions
3076 //
3077 
3078 DT_RETURN_MARK_DECL(MonitorEnter, jint
3079                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3080 
3081 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3082  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3083   jint ret = JNI_ERR;
3084   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3085 
3086   // If the object is null, we can't do anything with it
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_enter(obj, CHECK_(JNI_ERR));
3093   ret = JNI_OK;
3094   return ret;
3095 JNI_END
3096 
3097 DT_RETURN_MARK_DECL(MonitorExit, jint
3098                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3099 
3100 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3101  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3102   jint ret = JNI_ERR;
3103   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3104 
3105   // Don't do anything with a null object
3106   if (jobj == NULL) {
3107     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3108   }
3109 
3110   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3111   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3112 
3113   ret = JNI_OK;
3114   return ret;
3115 JNI_END
3116 
3117 //
3118 // Extensions
3119 //
3120 
3121 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3122                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3123 
3124 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3125   JNIWrapper("GetStringRegion");
3126  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3127   DT_VOID_RETURN_MARK(GetStringRegion);
3128   oop s = JNIHandles::resolve_non_null(string);
3129   int s_len = java_lang_String::length(s);
3130   if (start < 0 || len < 0 || start + len > s_len) {
3131     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132   } else {
3133     if (len > 0) {
3134       typeArrayOop s_value = java_lang_String::value(s);
3135       bool is_latin1 = java_lang_String::is_latin1(s);
3136       if (!is_latin1) {
3137         memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3138       } else {
3139         for (int i = 0; i < len; i++) {
3140           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3141         }
3142       }
3143     }
3144   }
3145 JNI_END
3146 
3147 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3148                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3149 
3150 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3151   JNIWrapper("GetStringUTFRegion");
3152  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3153   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3154   oop s = JNIHandles::resolve_non_null(string);
3155   int s_len = java_lang_String::length(s);
3156   if (start < 0 || len < 0 || start + len > s_len) {
3157     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3158   } else {
3159     //%note jni_7
3160     if (len > 0) {
3161       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3162       java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3163       // as_utf8_string null-terminates the result string
3164     } else {
3165       // JDK null-terminates the buffer even in len is zero
3166       if (buf != NULL) {
3167         buf[0] = 0;
3168       }
3169     }
3170   }
3171 JNI_END
3172 
3173 
3174 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3175   JNIWrapper("GetPrimitiveArrayCritical");
3176  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3177   GCLocker::lock_critical(thread);
3178   if (isCopy != NULL) {
3179     *isCopy = JNI_FALSE;
3180   }
3181   oop a = JNIHandles::resolve_non_null(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   // The array, carray and mode arguments are ignored
3199   GCLocker::unlock_critical(thread);
3200 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3201 JNI_END
3202 
3203 
3204 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3205   JNIWrapper("GetStringCritical");
3206   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3207   GCLocker::lock_critical(thread);
3208   oop s = JNIHandles::resolve_non_null(string);
3209   typeArrayOop s_value = java_lang_String::value(s);
3210   bool is_latin1 = java_lang_String::is_latin1(s);
3211   if (isCopy != NULL) {
3212     *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3213   }
3214   jchar* ret;
3215   if (!is_latin1) {
3216     ret = (jchar*) s_value->base(T_CHAR);
3217   } else {
3218     // Inflate latin1 encoded string to UTF16
3219     int s_len = java_lang_String::length(s);
3220     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
3221     /* JNI Specification states return NULL on OOM */
3222     if (ret != NULL) {
3223       for (int i = 0; i < s_len; i++) {
3224         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3225       }
3226       ret[s_len] = 0;
3227     }
3228   }
3229  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3230   return ret;
3231 JNI_END
3232 
3233 
3234 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3235   JNIWrapper("ReleaseStringCritical");
3236   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3237   // The str and chars arguments are ignored for UTF16 strings
3238   oop s = JNIHandles::resolve_non_null(str);
3239   bool is_latin1 = java_lang_String::is_latin1(s);
3240   if (is_latin1) {
3241     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3242     // This assumes that ReleaseStringCritical bookends GetStringCritical.
3243     FREE_C_HEAP_ARRAY(jchar, chars);
3244   }
3245   GCLocker::unlock_critical(thread);
3246 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3247 JNI_END
3248 
3249 
3250 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3251   JNIWrapper("jni_NewWeakGlobalRef");
3252  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3253   Handle ref_handle(thread, JNIHandles::resolve(ref));
3254   jweak ret = JNIHandles::make_weak_global(ref_handle);
3255  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3256   return ret;
3257 JNI_END
3258 
3259 // Must be JNI_ENTRY (with HandleMark)
3260 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3261   JNIWrapper("jni_DeleteWeakGlobalRef");
3262   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3263   JNIHandles::destroy_weak_global(ref);
3264   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3265 JNI_END
3266 
3267 
3268 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3269   JNIWrapper("jni_ExceptionCheck");
3270  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3271   jni_check_async_exceptions(thread);
3272   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3273  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3274   return ret;
3275 JNI_END
3276 
3277 
3278 // Initialization state for three routines below relating to
3279 // java.nio.DirectBuffers
3280 static          int directBufferSupportInitializeStarted = 0;
3281 static volatile int directBufferSupportInitializeEnded   = 0;
3282 static volatile int directBufferSupportInitializeFailed  = 0;
3283 static jclass    bufferClass                 = NULL;
3284 static jclass    directBufferClass           = NULL;
3285 static jclass    directByteBufferClass       = NULL;
3286 static jmethodID directByteBufferConstructor = NULL;
3287 static jfieldID  directBufferAddressField    = NULL;
3288 static jfieldID  bufferCapacityField         = NULL;
3289 
3290 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3291   Handle loader;            // null (bootstrap) loader
3292   Handle protection_domain; // null protection domain
3293 
3294   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3295   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3296 
3297   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3298     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3299   }
3300   return result;
3301 }
3302 
3303 // These lookups are done with the NULL (bootstrap) ClassLoader to
3304 // circumvent any security checks that would be done by jni_FindClass.
3305 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3306 {
3307   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3308   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3309   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3310   return true;
3311 }
3312 JNI_END
3313 
3314 
3315 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3316   if (directBufferSupportInitializeFailed) {
3317     return false;
3318   }
3319 
3320   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3321     if (!lookupDirectBufferClasses(env)) {
3322       directBufferSupportInitializeFailed = 1;
3323       return false;
3324     }
3325 
3326     // Make global references for these
3327     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3328     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3329     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3330 
3331     // Get needed field and method IDs
3332     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3333     if (env->ExceptionCheck()) {
3334       env->ExceptionClear();
3335       directBufferSupportInitializeFailed = 1;
3336       return false;
3337     }
3338     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3339     if (env->ExceptionCheck()) {
3340       env->ExceptionClear();
3341       directBufferSupportInitializeFailed = 1;
3342       return false;
3343     }
3344     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3345     if (env->ExceptionCheck()) {
3346       env->ExceptionClear();
3347       directBufferSupportInitializeFailed = 1;
3348       return false;
3349     }
3350 
3351     if ((directByteBufferConstructor == NULL) ||
3352         (directBufferAddressField    == NULL) ||
3353         (bufferCapacityField         == NULL)) {
3354       directBufferSupportInitializeFailed = 1;
3355       return false;
3356     }
3357 
3358     directBufferSupportInitializeEnded = 1;
3359   } else {
3360     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3361       os::naked_yield();
3362     }
3363   }
3364 
3365   return !directBufferSupportInitializeFailed;
3366 }
3367 
3368 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3369 {
3370   // thread_from_jni_environment() will block if VM is gone.
3371   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3372 
3373   JNIWrapper("jni_NewDirectByteBuffer");
3374  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3375 
3376   if (!directBufferSupportInitializeEnded) {
3377     if (!initializeDirectBufferSupport(env, thread)) {
3378       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3379       return NULL;
3380     }
3381   }
3382 
3383   // Being paranoid about accidental sign extension on address
3384   jlong addr = (jlong) ((uintptr_t) address);
3385   // NOTE that package-private DirectByteBuffer constructor currently
3386   // takes int capacity
3387   jint  cap  = (jint)  capacity;
3388   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3389   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3390   return ret;
3391 }
3392 
3393 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3394                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3395 
3396 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3397 {
3398   // thread_from_jni_environment() will block if VM is gone.
3399   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3400 
3401   JNIWrapper("jni_GetDirectBufferAddress");
3402   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3403   void* ret = NULL;
3404   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3405 
3406   if (!directBufferSupportInitializeEnded) {
3407     if (!initializeDirectBufferSupport(env, thread)) {
3408       return 0;
3409     }
3410   }
3411 
3412   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3413     return 0;
3414   }
3415 
3416   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3417   return ret;
3418 }
3419 
3420 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3421                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3422 
3423 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3424 {
3425   // thread_from_jni_environment() will block if VM is gone.
3426   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3427 
3428   JNIWrapper("jni_GetDirectBufferCapacity");
3429   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3430   jlong ret = -1;
3431   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3432 
3433   if (!directBufferSupportInitializeEnded) {
3434     if (!initializeDirectBufferSupport(env, thread)) {
3435       ret = 0;
3436       return ret;
3437     }
3438   }
3439 
3440   if (buf == NULL) {
3441     return -1;
3442   }
3443 
3444   if (!env->IsInstanceOf(buf, directBufferClass)) {
3445     return -1;
3446   }
3447 
3448   // NOTE that capacity is currently an int in the implementation
3449   ret = env->GetIntField(buf, bufferCapacityField);
3450   return ret;
3451 }
3452 
3453 
3454 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3455   JNIWrapper("GetVersion");
3456   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3457   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3458   return CurrentVersion;
3459 JNI_END
3460 
3461 extern struct JavaVM_ main_vm;
3462 
3463 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3464   JNIWrapper("jni_GetJavaVM");
3465   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3466   *vm  = (JavaVM *)(&main_vm);
3467   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3468   return JNI_OK;
3469 JNI_END
3470 
3471 
3472 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3473   JNIWrapper("GetModule");
3474   return Modules::get_module(clazz, THREAD);
3475 JNI_END
3476 
3477 
3478 // Structure containing all jni functions
3479 struct JNINativeInterface_ jni_NativeInterface = {
3480     NULL,
3481     NULL,
3482     NULL,
3483 
3484     NULL,
3485 
3486     jni_GetVersion,
3487 
3488     jni_DefineClass,
3489     jni_FindClass,
3490 
3491     jni_FromReflectedMethod,
3492     jni_FromReflectedField,
3493 
3494     jni_ToReflectedMethod,
3495 
3496     jni_GetSuperclass,
3497     jni_IsAssignableFrom,
3498 
3499     jni_ToReflectedField,
3500 
3501     jni_Throw,
3502     jni_ThrowNew,
3503     jni_ExceptionOccurred,
3504     jni_ExceptionDescribe,
3505     jni_ExceptionClear,
3506     jni_FatalError,
3507 
3508     jni_PushLocalFrame,
3509     jni_PopLocalFrame,
3510 
3511     jni_NewGlobalRef,
3512     jni_DeleteGlobalRef,
3513     jni_DeleteLocalRef,
3514     jni_IsSameObject,
3515 
3516     jni_NewLocalRef,
3517     jni_EnsureLocalCapacity,
3518 
3519     jni_AllocObject,
3520     jni_NewObject,
3521     jni_NewObjectV,
3522     jni_NewObjectA,
3523 
3524     jni_GetObjectClass,
3525     jni_IsInstanceOf,
3526 
3527     jni_GetMethodID,
3528 
3529     jni_CallObjectMethod,
3530     jni_CallObjectMethodV,
3531     jni_CallObjectMethodA,
3532     jni_CallBooleanMethod,
3533     jni_CallBooleanMethodV,
3534     jni_CallBooleanMethodA,
3535     jni_CallByteMethod,
3536     jni_CallByteMethodV,
3537     jni_CallByteMethodA,
3538     jni_CallCharMethod,
3539     jni_CallCharMethodV,
3540     jni_CallCharMethodA,
3541     jni_CallShortMethod,
3542     jni_CallShortMethodV,
3543     jni_CallShortMethodA,
3544     jni_CallIntMethod,
3545     jni_CallIntMethodV,
3546     jni_CallIntMethodA,
3547     jni_CallLongMethod,
3548     jni_CallLongMethodV,
3549     jni_CallLongMethodA,
3550     jni_CallFloatMethod,
3551     jni_CallFloatMethodV,
3552     jni_CallFloatMethodA,
3553     jni_CallDoubleMethod,
3554     jni_CallDoubleMethodV,
3555     jni_CallDoubleMethodA,
3556     jni_CallVoidMethod,
3557     jni_CallVoidMethodV,
3558     jni_CallVoidMethodA,
3559 
3560     jni_CallNonvirtualObjectMethod,
3561     jni_CallNonvirtualObjectMethodV,
3562     jni_CallNonvirtualObjectMethodA,
3563     jni_CallNonvirtualBooleanMethod,
3564     jni_CallNonvirtualBooleanMethodV,
3565     jni_CallNonvirtualBooleanMethodA,
3566     jni_CallNonvirtualByteMethod,
3567     jni_CallNonvirtualByteMethodV,
3568     jni_CallNonvirtualByteMethodA,
3569     jni_CallNonvirtualCharMethod,
3570     jni_CallNonvirtualCharMethodV,
3571     jni_CallNonvirtualCharMethodA,
3572     jni_CallNonvirtualShortMethod,
3573     jni_CallNonvirtualShortMethodV,
3574     jni_CallNonvirtualShortMethodA,
3575     jni_CallNonvirtualIntMethod,
3576     jni_CallNonvirtualIntMethodV,
3577     jni_CallNonvirtualIntMethodA,
3578     jni_CallNonvirtualLongMethod,
3579     jni_CallNonvirtualLongMethodV,
3580     jni_CallNonvirtualLongMethodA,
3581     jni_CallNonvirtualFloatMethod,
3582     jni_CallNonvirtualFloatMethodV,
3583     jni_CallNonvirtualFloatMethodA,
3584     jni_CallNonvirtualDoubleMethod,
3585     jni_CallNonvirtualDoubleMethodV,
3586     jni_CallNonvirtualDoubleMethodA,
3587     jni_CallNonvirtualVoidMethod,
3588     jni_CallNonvirtualVoidMethodV,
3589     jni_CallNonvirtualVoidMethodA,
3590 
3591     jni_GetFieldID,
3592 
3593     jni_GetObjectField,
3594     jni_GetBooleanField,
3595     jni_GetByteField,
3596     jni_GetCharField,
3597     jni_GetShortField,
3598     jni_GetIntField,
3599     jni_GetLongField,
3600     jni_GetFloatField,
3601     jni_GetDoubleField,
3602 
3603     jni_SetObjectField,
3604     jni_SetBooleanField,
3605     jni_SetByteField,
3606     jni_SetCharField,
3607     jni_SetShortField,
3608     jni_SetIntField,
3609     jni_SetLongField,
3610     jni_SetFloatField,
3611     jni_SetDoubleField,
3612 
3613     jni_GetStaticMethodID,
3614 
3615     jni_CallStaticObjectMethod,
3616     jni_CallStaticObjectMethodV,
3617     jni_CallStaticObjectMethodA,
3618     jni_CallStaticBooleanMethod,
3619     jni_CallStaticBooleanMethodV,
3620     jni_CallStaticBooleanMethodA,
3621     jni_CallStaticByteMethod,
3622     jni_CallStaticByteMethodV,
3623     jni_CallStaticByteMethodA,
3624     jni_CallStaticCharMethod,
3625     jni_CallStaticCharMethodV,
3626     jni_CallStaticCharMethodA,
3627     jni_CallStaticShortMethod,
3628     jni_CallStaticShortMethodV,
3629     jni_CallStaticShortMethodA,
3630     jni_CallStaticIntMethod,
3631     jni_CallStaticIntMethodV,
3632     jni_CallStaticIntMethodA,
3633     jni_CallStaticLongMethod,
3634     jni_CallStaticLongMethodV,
3635     jni_CallStaticLongMethodA,
3636     jni_CallStaticFloatMethod,
3637     jni_CallStaticFloatMethodV,
3638     jni_CallStaticFloatMethodA,
3639     jni_CallStaticDoubleMethod,
3640     jni_CallStaticDoubleMethodV,
3641     jni_CallStaticDoubleMethodA,
3642     jni_CallStaticVoidMethod,
3643     jni_CallStaticVoidMethodV,
3644     jni_CallStaticVoidMethodA,
3645 
3646     jni_GetStaticFieldID,
3647 
3648     jni_GetStaticObjectField,
3649     jni_GetStaticBooleanField,
3650     jni_GetStaticByteField,
3651     jni_GetStaticCharField,
3652     jni_GetStaticShortField,
3653     jni_GetStaticIntField,
3654     jni_GetStaticLongField,
3655     jni_GetStaticFloatField,
3656     jni_GetStaticDoubleField,
3657 
3658     jni_SetStaticObjectField,
3659     jni_SetStaticBooleanField,
3660     jni_SetStaticByteField,
3661     jni_SetStaticCharField,
3662     jni_SetStaticShortField,
3663     jni_SetStaticIntField,
3664     jni_SetStaticLongField,
3665     jni_SetStaticFloatField,
3666     jni_SetStaticDoubleField,
3667 
3668     jni_NewString,
3669     jni_GetStringLength,
3670     jni_GetStringChars,
3671     jni_ReleaseStringChars,
3672 
3673     jni_NewStringUTF,
3674     jni_GetStringUTFLength,
3675     jni_GetStringUTFChars,
3676     jni_ReleaseStringUTFChars,
3677 
3678     jni_GetArrayLength,
3679 
3680     jni_NewObjectArray,
3681     jni_GetObjectArrayElement,
3682     jni_SetObjectArrayElement,
3683 
3684     jni_NewBooleanArray,
3685     jni_NewByteArray,
3686     jni_NewCharArray,
3687     jni_NewShortArray,
3688     jni_NewIntArray,
3689     jni_NewLongArray,
3690     jni_NewFloatArray,
3691     jni_NewDoubleArray,
3692 
3693     jni_GetBooleanArrayElements,
3694     jni_GetByteArrayElements,
3695     jni_GetCharArrayElements,
3696     jni_GetShortArrayElements,
3697     jni_GetIntArrayElements,
3698     jni_GetLongArrayElements,
3699     jni_GetFloatArrayElements,
3700     jni_GetDoubleArrayElements,
3701 
3702     jni_ReleaseBooleanArrayElements,
3703     jni_ReleaseByteArrayElements,
3704     jni_ReleaseCharArrayElements,
3705     jni_ReleaseShortArrayElements,
3706     jni_ReleaseIntArrayElements,
3707     jni_ReleaseLongArrayElements,
3708     jni_ReleaseFloatArrayElements,
3709     jni_ReleaseDoubleArrayElements,
3710 
3711     jni_GetBooleanArrayRegion,
3712     jni_GetByteArrayRegion,
3713     jni_GetCharArrayRegion,
3714     jni_GetShortArrayRegion,
3715     jni_GetIntArrayRegion,
3716     jni_GetLongArrayRegion,
3717     jni_GetFloatArrayRegion,
3718     jni_GetDoubleArrayRegion,
3719 
3720     jni_SetBooleanArrayRegion,
3721     jni_SetByteArrayRegion,
3722     jni_SetCharArrayRegion,
3723     jni_SetShortArrayRegion,
3724     jni_SetIntArrayRegion,
3725     jni_SetLongArrayRegion,
3726     jni_SetFloatArrayRegion,
3727     jni_SetDoubleArrayRegion,
3728 
3729     jni_RegisterNatives,
3730     jni_UnregisterNatives,
3731 
3732     jni_MonitorEnter,
3733     jni_MonitorExit,
3734 
3735     jni_GetJavaVM,
3736 
3737     jni_GetStringRegion,
3738     jni_GetStringUTFRegion,
3739 
3740     jni_GetPrimitiveArrayCritical,
3741     jni_ReleasePrimitiveArrayCritical,
3742 
3743     jni_GetStringCritical,
3744     jni_ReleaseStringCritical,
3745 
3746     jni_NewWeakGlobalRef,
3747     jni_DeleteWeakGlobalRef,
3748 
3749     jni_ExceptionCheck,
3750 
3751     jni_NewDirectByteBuffer,
3752     jni_GetDirectBufferAddress,
3753     jni_GetDirectBufferCapacity,
3754 
3755     // New 1_6 features
3756 
3757     jni_GetObjectRefType,
3758 
3759     // Module features
3760 
3761     jni_GetModule
3762 };
3763 
3764 
3765 // For jvmti use to modify jni function table.
3766 // Java threads in native contiues to run until it is transitioned
3767 // to VM at safepoint. Before the transition or before it is blocked
3768 // for safepoint it may access jni function table. VM could crash if
3769 // any java thread access the jni function table in the middle of memcpy.
3770 // To avoid this each function pointers are copied automically.
3771 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3772   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3773   intptr_t *a = (intptr_t *) jni_functions();
3774   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3775   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3776     Atomic::store(*b++, a++);
3777   }
3778 }
3779 
3780 void quicken_jni_functions() {
3781   // Replace Get<Primitive>Field with fast versions
3782   if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3783       && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3784 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3785       // windows x86 currently needs SEH wrapper and the gain of the fast
3786       // versions currently isn't certain for server vm on uniprocessor.
3787       && os::is_MP()
3788 #endif
3789   ) {
3790     address func;
3791     func = JNI_FastGetField::generate_fast_get_boolean_field();
3792     if (func != (address)-1) {
3793       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3794     }
3795     func = JNI_FastGetField::generate_fast_get_byte_field();
3796     if (func != (address)-1) {
3797       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3798     }
3799     func = JNI_FastGetField::generate_fast_get_char_field();
3800     if (func != (address)-1) {
3801       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3802     }
3803     func = JNI_FastGetField::generate_fast_get_short_field();
3804     if (func != (address)-1) {
3805       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3806     }
3807     func = JNI_FastGetField::generate_fast_get_int_field();
3808     if (func != (address)-1) {
3809       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3810     }
3811     func = JNI_FastGetField::generate_fast_get_long_field();
3812     if (func != (address)-1) {
3813       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3814     }
3815     func = JNI_FastGetField::generate_fast_get_float_field();
3816     if (func != (address)-1) {
3817       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3818     }
3819     func = JNI_FastGetField::generate_fast_get_double_field();
3820     if (func != (address)-1) {
3821       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3822     }
3823   }
3824 }
3825 
3826 // Returns the function structure
3827 struct JNINativeInterface_* jni_functions() {
3828 #if INCLUDE_JNI_CHECK
3829   if (CheckJNICalls) return jni_functions_check();
3830 #endif // INCLUDE_JNI_CHECK
3831   return &jni_NativeInterface;
3832 }
3833 
3834 // Returns the function structure
3835 struct JNINativeInterface_* jni_functions_nocheck() {
3836   return &jni_NativeInterface;
3837 }
3838 
3839 
3840 // Invocation API
3841 
3842 
3843 // Forward declaration
3844 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3845 
3846 // Global invocation API vars
3847 volatile int vm_created = 0;
3848 // Indicate whether it is safe to recreate VM
3849 volatile int safe_to_recreate_vm = 1;
3850 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3851 
3852 
3853 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3854 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3855 
3856 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3857                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3858 
3859 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3860   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3861   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3862   jint ret = JNI_ERR;
3863   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3864 
3865   if (Threads::is_supported_jni_version(args->version)) {
3866     ret = JNI_OK;
3867   }
3868   // 1.1 style no longer supported in hotspot.
3869   // According the JNI spec, we should update args->version on return.
3870   // We also use the structure to communicate with launcher about default
3871   // stack size.
3872   if (args->version == JNI_VERSION_1_1) {
3873     args->version = JNI_VERSION_1_2;
3874     // javaStackSize is int in arguments structure
3875     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3876     args->javaStackSize = (jint)(ThreadStackSize * K);
3877   }
3878   return ret;
3879 }
3880 
3881 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3882                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3883 
3884 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3885   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3886 
3887   jint result = JNI_ERR;
3888   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3889 
3890   // We're about to use Atomic::xchg for synchronization.  Some Zero
3891   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3892   // but __sync_lock_test_and_set is not guaranteed to do what we want
3893   // on all architectures.  So we check it works before relying on it.
3894 #if defined(ZERO) && defined(ASSERT)
3895   {
3896     jint a = 0xcafebabe;
3897     jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3898     void *c = &a;
3899     void *d = Atomic::xchg(&b, &c);
3900     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3901     assert(c == &b && d == &a, "Atomic::xchg() works");
3902   }
3903 #endif // ZERO && ASSERT
3904 
3905   // At the moment it's only possible to have one Java VM,
3906   // since some of the runtime state is in global variables.
3907 
3908   // We cannot use our mutex locks here, since they only work on
3909   // Threads. We do an atomic compare and exchange to ensure only
3910   // one thread can call this method at a time
3911 
3912   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3913   // the add/dec implementations are dependent on whether we are running
3914   // on a multiprocessor, and at this stage of initialization the os::is_MP
3915   // function used to determine this will always return false. Atomic::xchg
3916   // does not have this problem.
3917   if (Atomic::xchg(1, &vm_created) == 1) {
3918     return JNI_EEXIST;   // already created, or create attempt in progress
3919   }
3920   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3921     return JNI_ERR;  // someone tried and failed and retry not allowed.
3922   }
3923 
3924   assert(vm_created == 1, "vm_created is true during the creation");
3925 
3926   /**
3927    * Certain errors during initialization are recoverable and do not
3928    * prevent this method from being called again at a later time
3929    * (perhaps with different arguments).  However, at a certain
3930    * point during initialization if an error occurs we cannot allow
3931    * this function to be called again (or it will crash).  In those
3932    * situations, the 'canTryAgain' flag is set to false, which atomically
3933    * sets safe_to_recreate_vm to 1, such that any new call to
3934    * JNI_CreateJavaVM will immediately fail using the above logic.
3935    */
3936   bool can_try_again = true;
3937 
3938   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3939   if (result == JNI_OK) {
3940     JavaThread *thread = JavaThread::current();
3941     assert(!thread->has_pending_exception(), "should have returned not OK");
3942     /* thread is thread_in_vm here */
3943     *vm = (JavaVM *)(&main_vm);
3944     *(JNIEnv**)penv = thread->jni_environment();
3945 
3946 #if INCLUDE_JVMCI
3947     if (EnableJVMCI) {
3948       if (UseJVMCICompiler) {
3949         // JVMCI is initialized on a CompilerThread
3950         if (BootstrapJVMCI) {
3951           JavaThread* THREAD = thread;
3952           JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3953           compiler->bootstrap(THREAD);
3954           if (HAS_PENDING_EXCEPTION) {
3955             HandleMark hm;
3956             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3957           }
3958         }
3959       }
3960     }
3961 #endif
3962 
3963     // Tracks the time application was running before GC
3964     RuntimeService::record_application_start();
3965 
3966     // Notify JVMTI
3967     if (JvmtiExport::should_post_thread_life()) {
3968        JvmtiExport::post_thread_start(thread);
3969     }
3970 
3971     EventThreadStart event;
3972     if (event.should_commit()) {
3973       event.set_thread(THREAD_TRACE_ID(thread));
3974       event.commit();
3975     }
3976 
3977 #ifndef PRODUCT
3978     // Check if we should compile all classes on bootclasspath
3979     if (CompileTheWorld) ClassLoader::compile_the_world();
3980     if (ReplayCompiles) ciReplay::replay(thread);
3981 
3982     // Some platforms (like Win*) need a wrapper around these test
3983     // functions in order to properly handle error conditions.
3984     VMError::test_error_handler();
3985     if (ExecuteInternalVMTests) {
3986       InternalVMTests::run();
3987     }
3988 #endif
3989 
3990     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3991     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3992   } else {
3993     // If create_vm exits because of a pending exception, exit with that
3994     // exception.  In the future when we figure out how to reclaim memory,
3995     // we may be able to exit with JNI_ERR and allow the calling application
3996     // to continue.
3997     if (Universe::is_fully_initialized()) {
3998       // otherwise no pending exception possible - VM will already have aborted
3999       JavaThread* THREAD = JavaThread::current();
4000       if (HAS_PENDING_EXCEPTION) {
4001         HandleMark hm;
4002         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4003       }
4004     }
4005 
4006     if (can_try_again) {
4007       // reset safe_to_recreate_vm to 1 so that retrial would be possible
4008       safe_to_recreate_vm = 1;
4009     }
4010 
4011     // Creation failed. We must reset vm_created
4012     *vm = 0;
4013     *(JNIEnv**)penv = 0;
4014     // reset vm_created last to avoid race condition. Use OrderAccess to
4015     // control both compiler and architectural-based reordering.
4016     OrderAccess::release_store(&vm_created, 0);
4017   }
4018 
4019   // Flush stdout and stderr before exit.
4020   fflush(stdout);
4021   fflush(stderr);
4022 
4023   return result;
4024 
4025 }
4026 
4027 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4028   jint result = JNI_ERR;
4029   // On Windows, let CreateJavaVM run with SEH protection
4030 #ifdef _WIN32
4031   __try {
4032 #endif
4033     result = JNI_CreateJavaVM_inner(vm, penv, args);
4034 #ifdef _WIN32
4035   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4036     // Nothing to do.
4037   }
4038 #endif
4039   return result;
4040 }
4041 
4042 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4043   // See bug 4367188, the wrapper can sometimes cause VM crashes
4044   // JNIWrapper("GetCreatedJavaVMs");
4045 
4046   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4047 
4048   if (vm_created == 1) {
4049     if (numVMs != NULL) *numVMs = 1;
4050     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4051   } else {
4052     if (numVMs != NULL) *numVMs = 0;
4053   }
4054   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4055   return JNI_OK;
4056 }
4057 
4058 extern "C" {
4059 
4060 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4061                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4062 
4063 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4064   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4065   jint res = JNI_ERR;
4066   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4067 
4068   if (vm_created == 0) {
4069     res = JNI_ERR;
4070     return res;
4071   }
4072 
4073   JNIWrapper("DestroyJavaVM");
4074   JNIEnv *env;
4075   JavaVMAttachArgs destroyargs;
4076   destroyargs.version = CurrentVersion;
4077   destroyargs.name = (char *)"DestroyJavaVM";
4078   destroyargs.group = NULL;
4079   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4080   if (res != JNI_OK) {
4081     return res;
4082   }
4083 
4084   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4085   JavaThread* thread = JavaThread::current();
4086   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4087   if (Threads::destroy_vm()) {
4088     // Should not change thread state, VM is gone
4089     vm_created = 0;
4090     res = JNI_OK;
4091     return res;
4092   } else {
4093     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4094     res = JNI_ERR;
4095     return res;
4096   }
4097 }
4098 
4099 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4100   jint result = JNI_ERR;
4101   // On Windows, we need SEH protection
4102 #ifdef _WIN32
4103   __try {
4104 #endif
4105     result = jni_DestroyJavaVM_inner(vm);
4106 #ifdef _WIN32
4107   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4108     // Nothing to do.
4109   }
4110 #endif
4111   return result;
4112 }
4113 
4114 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4115   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4116 
4117   // Check below commented out from JDK1.2fcs as well
4118   /*
4119   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4120     return JNI_EVERSION;
4121   }
4122   */
4123 
4124   Thread* t = Thread::current_or_null();
4125   if (t != NULL) {
4126     // If the thread has been attached this operation is a no-op
4127     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4128     return JNI_OK;
4129   }
4130 
4131   // Create a thread and mark it as attaching so it will be skipped by the
4132   // ThreadsListEnumerator - see CR 6404306
4133   JavaThread* thread = new JavaThread(true);
4134 
4135   // Set correct safepoint info. The thread is going to call into Java when
4136   // initializing the Java level thread object. Hence, the correct state must
4137   // be set in order for the Safepoint code to deal with it correctly.
4138   thread->set_thread_state(_thread_in_vm);
4139   thread->record_stack_base_and_size();
4140   thread->initialize_thread_current();
4141 
4142   if (!os::create_attached_thread(thread)) {
4143     delete thread;
4144     return JNI_ERR;
4145   }
4146   // Enable stack overflow checks
4147   thread->create_stack_guard_pages();
4148 
4149   thread->initialize_tlab();
4150 
4151   thread->cache_global_variables();
4152 
4153   // Crucial that we do not have a safepoint check for this thread, since it has
4154   // not been added to the Thread list yet.
4155   { Threads_lock->lock_without_safepoint_check();
4156     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4157     // avoid this thread trying to do a GC before it is added to the thread-list
4158     thread->set_active_handles(JNIHandleBlock::allocate_block());
4159     Threads::add(thread, daemon);
4160     Threads_lock->unlock();
4161   }
4162   // Create thread group and name info from attach arguments
4163   oop group = NULL;
4164   char* thread_name = NULL;
4165   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4166     group = JNIHandles::resolve(args->group);
4167     thread_name = args->name; // may be NULL
4168   }
4169   if (group == NULL) group = Universe::main_thread_group();
4170 
4171   // Create Java level thread object and attach it to this thread
4172   bool attach_failed = false;
4173   {
4174     EXCEPTION_MARK;
4175     HandleMark hm(THREAD);
4176     Handle thread_group(THREAD, group);
4177     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4178     if (HAS_PENDING_EXCEPTION) {
4179       CLEAR_PENDING_EXCEPTION;
4180       // cleanup outside the handle mark.
4181       attach_failed = true;
4182     }
4183   }
4184 
4185   if (attach_failed) {
4186     // Added missing cleanup
4187     thread->cleanup_failed_attach_current_thread();
4188     return JNI_ERR;
4189   }
4190 
4191   // mark the thread as no longer attaching
4192   // this uses a fence to push the change through so we don't have
4193   // to regrab the threads_lock
4194   thread->set_done_attaching_via_jni();
4195 
4196   // Set java thread status.
4197   java_lang_Thread::set_thread_status(thread->threadObj(),
4198               java_lang_Thread::RUNNABLE);
4199 
4200   // Notify the debugger
4201   if (JvmtiExport::should_post_thread_life()) {
4202     JvmtiExport::post_thread_start(thread);
4203   }
4204 
4205   EventThreadStart event;
4206   if (event.should_commit()) {
4207     event.set_thread(THREAD_TRACE_ID(thread));
4208     event.commit();
4209   }
4210 
4211   *(JNIEnv**)penv = thread->jni_environment();
4212 
4213   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4214   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4215   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4216   // needed.
4217 
4218   ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4219 
4220   // Perform any platform dependent FPU setup
4221   os::setup_fpu();
4222 
4223   return JNI_OK;
4224 }
4225 
4226 
4227 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4228   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4229   if (vm_created == 0) {
4230   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4231     return JNI_ERR;
4232   }
4233 
4234   JNIWrapper("AttachCurrentThread");
4235   jint ret = attach_current_thread(vm, penv, _args, false);
4236   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4237   return ret;
4238 }
4239 
4240 
4241 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4242   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4243   VM_Exit::block_if_vm_exited();
4244 
4245   JNIWrapper("DetachCurrentThread");
4246 
4247   // If the thread has already been detached the operation is a no-op
4248   if (Thread::current_or_null() == NULL) {
4249   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4250     return JNI_OK;
4251   }
4252 
4253   JavaThread* thread = JavaThread::current();
4254   if (thread->has_last_Java_frame()) {
4255   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4256     // Can't detach a thread that's running java, that can't work.
4257     return JNI_ERR;
4258   }
4259 
4260   // Safepoint support. Have to do call-back to safepoint code, if in the
4261   // middel of a safepoint operation
4262   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4263 
4264   // XXX: Note that JavaThread::exit() call below removes the guards on the
4265   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4266   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4267   // of the guards is visible in jni_AttachCurrentThread above,
4268   // the removal of the guards is buried below in JavaThread::exit()
4269   // here. The abstraction should be more symmetrically either exposed
4270   // or hidden (e.g. it could probably be hidden in the same
4271   // (platform-dependent) methods where we do alternate stack
4272   // maintenance work?)
4273   thread->exit(false, JavaThread::jni_detach);
4274   delete thread;
4275 
4276   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4277   return JNI_OK;
4278 }
4279 
4280 DT_RETURN_MARK_DECL(GetEnv, jint
4281                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4282 
4283 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4284   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4285   jint ret = JNI_ERR;
4286   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4287 
4288   if (vm_created == 0) {
4289     *penv = NULL;
4290     ret = JNI_EDETACHED;
4291     return ret;
4292   }
4293 
4294   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4295     return ret;
4296   }
4297 
4298 #ifndef JVMPI_VERSION_1
4299 // need these in order to be polite about older agents
4300 #define JVMPI_VERSION_1   ((jint)0x10000001)
4301 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4302 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4303 #endif // !JVMPI_VERSION_1
4304 
4305   Thread* thread = Thread::current_or_null();
4306   if (thread != NULL && thread->is_Java_thread()) {
4307     if (Threads::is_supported_jni_version_including_1_1(version)) {
4308       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4309       ret = JNI_OK;
4310       return ret;
4311 
4312     } else if (version == JVMPI_VERSION_1 ||
4313                version == JVMPI_VERSION_1_1 ||
4314                version == JVMPI_VERSION_1_2) {
4315       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4316       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4317       ret = JNI_EVERSION;
4318       return ret;
4319     } else if (JvmtiExport::is_jvmdi_version(version)) {
4320       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4321       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4322       ret = JNI_EVERSION;
4323       return ret;
4324     } else {
4325       *penv = NULL;
4326       ret = JNI_EVERSION;
4327       return ret;
4328     }
4329   } else {
4330     *penv = NULL;
4331     ret = JNI_EDETACHED;
4332     return ret;
4333   }
4334 }
4335 
4336 
4337 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4338   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4339   if (vm_created == 0) {
4340   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4341     return JNI_ERR;
4342   }
4343 
4344   JNIWrapper("AttachCurrentThreadAsDaemon");
4345   jint ret = attach_current_thread(vm, penv, _args, true);
4346   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4347   return ret;
4348 }
4349 
4350 
4351 } // End extern "C"
4352 
4353 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4354     NULL,
4355     NULL,
4356     NULL,
4357 
4358     jni_DestroyJavaVM,
4359     jni_AttachCurrentThread,
4360     jni_DetachCurrentThread,
4361     jni_GetEnv,
4362     jni_AttachCurrentThreadAsDaemon
4363 };