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 "ci/ciReplay.hpp"
  28 #include "classfile/altHashing.hpp"
  29 #include "classfile/classFileStream.hpp"
  30 #include "classfile/classLoader.hpp"
  31 #include "classfile/javaClasses.hpp"
  32 #include "classfile/javaClasses.inline.hpp"
  33 #include "classfile/modules.hpp"
  34 #include "classfile/symbolTable.hpp"
  35 #include "classfile/systemDictionary.hpp"
  36 #include "classfile/vmSymbols.hpp"
  37 #include "gc/shared/gcLocker.inline.hpp"
  38 #include "interpreter/linkResolver.hpp"
  39 #include "memory/allocation.hpp"
  40 #include "memory/allocation.inline.hpp"
  41 #include "memory/oopFactory.hpp"
  42 #include "memory/resourceArea.hpp"
  43 #include "memory/universe.inline.hpp"
  44 #include "oops/instanceKlass.hpp"
  45 #include "oops/instanceOop.hpp"
  46 #include "oops/markOop.hpp"
  47 #include "oops/method.hpp"
  48 #include "oops/objArrayKlass.hpp"
  49 #include "oops/objArrayOop.inline.hpp"
  50 #include "oops/oop.inline.hpp"
  51 #include "oops/symbol.hpp"
  52 #include "oops/typeArrayKlass.hpp"
  53 #include "oops/typeArrayOop.hpp"
  54 #include "prims/jni.h"
  55 #include "prims/jniCheck.hpp"
  56 #include "prims/jniExport.hpp"
  57 #include "prims/jniFastGetField.hpp"
  58 #include "prims/jvm.h"
  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 jint 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 loader;
 400   Handle protection_domain;
 401   // Find calling class
 402   Klass* k = thread->security_get_caller_class(0);
 403   if (k != NULL) {
 404     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 405     // in the correct class context.
 406     if (k->class_loader() == NULL &&
 407         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 408       JavaValue result(T_OBJECT);
 409       JavaCalls::call_static(&result, k,
 410                              vmSymbols::getFromClass_name(),
 411                              vmSymbols::void_class_signature(),
 412                              CHECK_NULL);
 413       // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
 414       // a non-NULL Class object.  When invoked from JNI_OnUnload,
 415       // it will return NULL to indicate no context.
 416       oop mirror = (oop) result.get_jobject();
 417       if (mirror != NULL) {
 418         Klass* fromClass = java_lang_Class::as_Klass(mirror);
 419         loader = Handle(THREAD, fromClass->class_loader());
 420         protection_domain = Handle(THREAD, fromClass->protection_domain());
 421       }
 422     } else {
 423       loader = Handle(THREAD, k->class_loader());
 424     }
 425   }
 426 
 427   if (loader.is_null()) {
 428     // No context and use the system class loader
 429     loader = Handle(THREAD, SystemDictionary::java_system_loader());
 430   }
 431 
 432   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
 433   result = find_class_from_class_loader(env, sym, true, loader,
 434                                         protection_domain, true, thread);
 435 
 436   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 437     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 438   }
 439 
 440   // If we were the first invocation of jni_FindClass, we enable compilation again
 441   // rather than just allowing invocation counter to overflow and decay.
 442   // Controlled by flag DelayCompilationDuringStartup.
 443   if (first_time && !CompileTheWorld)
 444     CompilationPolicy::completed_vm_startup();
 445 
 446   return result;
 447 JNI_END
 448 
 449 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 450                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 451 
 452 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 453   JNIWrapper("FromReflectedMethod");
 454 
 455   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 456 
 457   jmethodID ret = NULL;
 458   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 459 
 460   // method is a handle to a java.lang.reflect.Method object
 461   oop reflected  = JNIHandles::resolve_non_null(method);
 462   oop mirror     = NULL;
 463   int slot       = 0;
 464 
 465   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 466     mirror = java_lang_reflect_Constructor::clazz(reflected);
 467     slot   = java_lang_reflect_Constructor::slot(reflected);
 468   } else {
 469     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 470     mirror = java_lang_reflect_Method::clazz(reflected);
 471     slot   = java_lang_reflect_Method::slot(reflected);
 472   }
 473   Klass* k1 = java_lang_Class::as_Klass(mirror);
 474 
 475   // Make sure class is initialized before handing id's out to methods
 476   k1->initialize(CHECK_NULL);
 477   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 478   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 479   return ret;
 480 JNI_END
 481 
 482 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 483                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 484 
 485 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 486   JNIWrapper("FromReflectedField");
 487 
 488   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 489 
 490   jfieldID ret = NULL;
 491   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 492 
 493   // field is a handle to a java.lang.reflect.Field object
 494   oop reflected   = JNIHandles::resolve_non_null(field);
 495   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 496   Klass* k1       = java_lang_Class::as_Klass(mirror);
 497   int slot        = java_lang_reflect_Field::slot(reflected);
 498   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 499 
 500   // Make sure class is initialized before handing id's out to fields
 501   k1->initialize(CHECK_NULL);
 502 
 503   // First check if this is a static field
 504   if (modifiers & JVM_ACC_STATIC) {
 505     intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 506     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 507     assert(id != NULL, "corrupt Field object");
 508     debug_only(id->set_is_static_field_id();)
 509     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 510     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 511     return ret;
 512   }
 513 
 514   // The slot is the index of the field description in the field-array
 515   // The jfieldID is the offset of the field within the object
 516   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 517   intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 518   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 519   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
 520   return ret;
 521 JNI_END
 522 
 523 
 524 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 525                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 526 
 527 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 528   JNIWrapper("ToReflectedMethod");
 529 
 530   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 531 
 532   jobject ret = NULL;
 533   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 534 
 535   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 536   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 537   oop reflection_method;
 538   if (m->is_initializer()) {
 539     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 540   } else {
 541     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 542   }
 543   ret = JNIHandles::make_local(env, reflection_method);
 544   return ret;
 545 JNI_END
 546 
 547 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 548                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 549 
 550 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 551   JNIWrapper("GetSuperclass");
 552 
 553   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 554 
 555   jclass obj = NULL;
 556   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 557 
 558   oop mirror = JNIHandles::resolve_non_null(sub);
 559   // primitive classes return NULL
 560   if (java_lang_Class::is_primitive(mirror)) return NULL;
 561 
 562   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 563   // arrays return Object
 564   // interfaces return NULL
 565   // proper classes return Klass::super()
 566   Klass* k = java_lang_Class::as_Klass(mirror);
 567   if (k->is_interface()) return NULL;
 568 
 569   // return mirror for superclass
 570   Klass* super = k->java_super();
 571   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 572   debug_only(Klass* super2 = ( k->is_array_klass()
 573                                  ? SystemDictionary::Object_klass()
 574                                  : k->super() ) );
 575   assert(super == super2,
 576          "java_super computation depends on interface, array, other super");
 577   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 578   return obj;
 579 JNI_END
 580 
 581 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 582   JNIWrapper("IsSubclassOf");
 583 
 584   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 585 
 586   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 587   oop super_mirror = JNIHandles::resolve_non_null(super);
 588   if (java_lang_Class::is_primitive(sub_mirror) ||
 589       java_lang_Class::is_primitive(super_mirror)) {
 590     jboolean ret = (sub_mirror == super_mirror);
 591 
 592     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 593     return ret;
 594   }
 595   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 596   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 597   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 598   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 599                    JNI_TRUE : JNI_FALSE;
 600 
 601   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 602   return ret;
 603 JNI_END
 604 
 605 
 606 DT_RETURN_MARK_DECL(Throw, jint
 607                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 608 
 609 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 610   JNIWrapper("Throw");
 611 
 612   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 613 
 614   jint ret = JNI_OK;
 615   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 616 
 617   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 618   ShouldNotReachHere();
 619   return 0;  // Mute compiler.
 620 JNI_END
 621 
 622 
 623 DT_RETURN_MARK_DECL(ThrowNew, jint
 624                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 625 
 626 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 627   JNIWrapper("ThrowNew");
 628 
 629   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 630 
 631   jint ret = JNI_OK;
 632   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 633 
 634   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 635   Symbol*  name = k->name();
 636   Handle class_loader (THREAD,  k->class_loader());
 637   Handle protection_domain (THREAD, k->protection_domain());
 638   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 639   ShouldNotReachHere();
 640   return 0;  // Mute compiler.
 641 JNI_END
 642 
 643 
 644 // JNI functions only transform a pending async exception to a synchronous
 645 // exception in ExceptionOccurred and ExceptionCheck calls, since
 646 // delivering an async exception in other places won't change the native
 647 // code's control flow and would be harmful when native code further calls
 648 // JNI functions with a pending exception. Async exception is also checked
 649 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 650 // false but deliver the async exception at the very end during
 651 // state transition.
 652 
 653 static void jni_check_async_exceptions(JavaThread *thread) {
 654   assert(thread == Thread::current(), "must be itself");
 655   thread->check_and_handle_async_exceptions();
 656 }
 657 
 658 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 659   JNIWrapper("ExceptionOccurred");
 660 
 661   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 662 
 663   jni_check_async_exceptions(thread);
 664   oop exception = thread->pending_exception();
 665   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 666 
 667   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 668   return ret;
 669 JNI_END
 670 
 671 
 672 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 673   JNIWrapper("ExceptionDescribe");
 674 
 675   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 676 
 677   if (thread->has_pending_exception()) {
 678     Handle ex(thread, thread->pending_exception());
 679     thread->clear_pending_exception();
 680     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 681       // Don't print anything if we are being killed.
 682     } else {
 683       jio_fprintf(defaultStream::error_stream(), "Exception ");
 684       if (thread != NULL && thread->threadObj() != NULL) {
 685         ResourceMark rm(THREAD);
 686         jio_fprintf(defaultStream::error_stream(),
 687         "in thread \"%s\" ", thread->get_thread_name());
 688       }
 689       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 690         JavaValue result(T_VOID);
 691         JavaCalls::call_virtual(&result,
 692                                 ex,
 693                                 SystemDictionary::Throwable_klass(),
 694                                 vmSymbols::printStackTrace_name(),
 695                                 vmSymbols::void_method_signature(),
 696                                 THREAD);
 697         // If an exception is thrown in the call it gets thrown away. Not much
 698         // we can do with it. The native code that calls this, does not check
 699         // for the exception - hence, it might still be in the thread when DestroyVM gets
 700         // called, potentially causing a few asserts to trigger - since no pending exception
 701         // is expected.
 702         CLEAR_PENDING_EXCEPTION;
 703       } else {
 704         ResourceMark rm(THREAD);
 705         jio_fprintf(defaultStream::error_stream(),
 706         ". Uncaught exception of type %s.",
 707         ex->klass()->external_name());
 708       }
 709     }
 710   }
 711 
 712   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 713 JNI_END
 714 
 715 
 716 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 717   JNIWrapper("ExceptionClear");
 718 
 719   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 720 
 721   // The jni code might be using this API to clear java thrown exception.
 722   // So just mark jvmti thread exception state as exception caught.
 723   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 724   if (state != NULL && state->is_exception_detected()) {
 725     state->set_exception_caught();
 726   }
 727   thread->clear_pending_exception();
 728 
 729   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 730 JNI_END
 731 
 732 
 733 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 734   JNIWrapper("FatalError");
 735 
 736   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 737 
 738   tty->print_cr("FATAL ERROR in native method: %s", msg);
 739   thread->print_stack();
 740   os::abort(); // Dump core and abort
 741 JNI_END
 742 
 743 
 744 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 745   JNIWrapper("PushLocalFrame");
 746 
 747   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 748 
 749   //%note jni_11
 750   if (capacity < 0 ||
 751       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 752     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 753     return JNI_ERR;
 754   }
 755   JNIHandleBlock* old_handles = thread->active_handles();
 756   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 757   assert(new_handles != NULL, "should not be NULL");
 758   new_handles->set_pop_frame_link(old_handles);
 759   thread->set_active_handles(new_handles);
 760   jint ret = JNI_OK;
 761   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 762   return ret;
 763 JNI_END
 764 
 765 
 766 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 767   JNIWrapper("PopLocalFrame");
 768 
 769   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 770 
 771   //%note jni_11
 772   Handle result_handle(thread, JNIHandles::resolve(result));
 773   JNIHandleBlock* old_handles = thread->active_handles();
 774   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 775   if (new_handles != NULL) {
 776     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 777     // This way code will still work if PopLocalFrame is called without a corresponding
 778     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 779     // the release_block call will release the blocks.
 780     thread->set_active_handles(new_handles);
 781     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 782     JNIHandleBlock::release_block(old_handles, thread); // may block
 783     result = JNIHandles::make_local(thread, result_handle());
 784   }
 785   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 786   return result;
 787 JNI_END
 788 
 789 
 790 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 791   JNIWrapper("NewGlobalRef");
 792 
 793   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 794 
 795   Handle ref_handle(thread, JNIHandles::resolve(ref));
 796   jobject ret = JNIHandles::make_global(ref_handle);
 797 
 798   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 799   return ret;
 800 JNI_END
 801 
 802 // Must be JNI_ENTRY (with HandleMark)
 803 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 804   JNIWrapper("DeleteGlobalRef");
 805 
 806   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 807 
 808   JNIHandles::destroy_global(ref);
 809 
 810   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 811 JNI_END
 812 
 813 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 814   JNIWrapper("DeleteLocalRef");
 815 
 816   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 817 
 818   JNIHandles::destroy_local(obj);
 819 
 820   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 821 JNI_END
 822 
 823 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 824   JNIWrapper("IsSameObject");
 825 
 826   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 827 
 828   oop a = JNIHandles::resolve(r1);
 829   oop b = JNIHandles::resolve(r2);
 830   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
 831 
 832   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 833   return ret;
 834 JNI_END
 835 
 836 
 837 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 838   JNIWrapper("NewLocalRef");
 839 
 840   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 841 
 842   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 843 
 844   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 845   return ret;
 846 JNI_END
 847 
 848 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 849   JNIWrapper("EnsureLocalCapacity");
 850 
 851   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 852 
 853   jint ret;
 854   if (capacity >= 0 &&
 855       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 856     ret = JNI_OK;
 857   } else {
 858     ret = JNI_ERR;
 859   }
 860 
 861   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 862   return ret;
 863 JNI_END
 864 
 865 // Return the Handle Type
 866 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 867   JNIWrapper("GetObjectRefType");
 868 
 869   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 870 
 871   jobjectRefType ret;
 872   if (JNIHandles::is_local_handle(thread, obj) ||
 873       JNIHandles::is_frame_handle(thread, obj))
 874     ret = JNILocalRefType;
 875   else if (JNIHandles::is_global_handle(obj))
 876     ret = JNIGlobalRefType;
 877   else if (JNIHandles::is_weak_global_handle(obj))
 878     ret = JNIWeakGlobalRefType;
 879   else
 880     ret = JNIInvalidRefType;
 881 
 882   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 883   return ret;
 884 JNI_END
 885 
 886 
 887 class JNI_ArgumentPusher : public SignatureIterator {
 888  protected:
 889   JavaCallArguments*  _arguments;
 890 
 891   virtual void get_bool   () = 0;
 892   virtual void get_char   () = 0;
 893   virtual void get_short  () = 0;
 894   virtual void get_byte   () = 0;
 895   virtual void get_int    () = 0;
 896   virtual void get_long   () = 0;
 897   virtual void get_float  () = 0;
 898   virtual void get_double () = 0;
 899   virtual void get_object () = 0;
 900 
 901   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 902     this->_return_type = T_ILLEGAL;
 903     _arguments = NULL;
 904   }
 905 
 906  public:
 907   virtual void iterate( uint64_t fingerprint ) = 0;
 908 
 909   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 910 
 911   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 912   inline void do_char()                     { if (!is_return_type()) get_char();   }
 913   inline void do_short()                    { if (!is_return_type()) get_short();  }
 914   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 915   inline void do_int()                      { if (!is_return_type()) get_int();    }
 916   inline void do_long()                     { if (!is_return_type()) get_long();   }
 917   inline void do_float()                    { if (!is_return_type()) get_float();  }
 918   inline void do_double()                   { if (!is_return_type()) get_double(); }
 919   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 920   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 921   inline void do_void()                     { }
 922 
 923   JavaCallArguments* arguments()     { return _arguments; }
 924   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 925 };
 926 
 927 
 928 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 929  protected:
 930   va_list _ap;
 931 
 932   inline void get_bool()   {
 933     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 934     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 935     // TemplateInterpreterGenerator::generate_result_handler_for and
 936     // SharedRuntime::generate_native_wrapper.
 937     jboolean b = va_arg(_ap, jint);
 938     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
 939   }
 940   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
 941   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
 942   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
 943   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }
 944 
 945   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 946 
 947   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }
 948   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
 949   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
 950   inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
 951 
 952   inline void set_ap(va_list rap) {
 953     va_copy(_ap, rap);
 954   }
 955 
 956  public:
 957   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 958        : JNI_ArgumentPusher(signature) {
 959     set_ap(rap);
 960   }
 961   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 962       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 963     set_ap(rap);
 964   }
 965 
 966   // Optimized path if we have the bitvector form of signature
 967   void iterate( uint64_t fingerprint ) {
 968     if (fingerprint == (uint64_t)CONST64(-1)) {
 969       SignatureIterator::iterate(); // Must be too many arguments
 970     } else {
 971       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 972                                   result_feature_mask);
 973 
 974       assert(fingerprint, "Fingerprint should not be 0");
 975       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 976       while ( 1 ) {
 977         switch ( fingerprint & parameter_feature_mask ) {
 978           case bool_parm:
 979             get_bool();
 980             break;
 981           case char_parm:
 982             get_char();
 983             break;
 984           case short_parm:
 985             get_short();
 986             break;
 987           case byte_parm:
 988             get_byte();
 989             break;
 990           case int_parm:
 991             get_int();
 992             break;
 993           case obj_parm:
 994             get_object();
 995             break;
 996           case long_parm:
 997             get_long();
 998             break;
 999           case float_parm:
1000             get_float();
1001             break;
1002           case double_parm:
1003             get_double();
1004             break;
1005           case done_parm:
1006             return;
1007             break;
1008           default:
1009             ShouldNotReachHere();
1010             break;
1011         }
1012         fingerprint >>= parameter_feature_size;
1013       }
1014     }
1015   }
1016 };
1017 
1018 
1019 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1020  protected:
1021   const jvalue *_ap;
1022 
1023   inline void get_bool()   {
1024     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1025     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
1026     // TemplateInterpreterGenerator::generate_result_handler_for and
1027     // SharedRuntime::generate_native_wrapper.
1028     jboolean b = (_ap++)->z;
1029     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1030   }
1031   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1032   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1033   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1034   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1035 
1036   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1037   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1038   inline void get_double() { _arguments->push_double((_ap++)->d);}
1039   inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1040 
1041   inline void set_ap(const jvalue *rap) { _ap = rap; }
1042 
1043  public:
1044   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1045        : JNI_ArgumentPusher(signature) {
1046     set_ap(rap);
1047   }
1048   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1049       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1050     set_ap(rap);
1051   }
1052 
1053   // Optimized path if we have the bitvector form of signature
1054   void iterate( uint64_t fingerprint ) {
1055     if (fingerprint == (uint64_t)CONST64(-1)) {
1056       SignatureIterator::iterate(); // Must be too many arguments
1057     } else {
1058       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1059                                   result_feature_mask);
1060       assert(fingerprint, "Fingerprint should not be 0");
1061       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1062       while ( 1 ) {
1063         switch ( fingerprint & parameter_feature_mask ) {
1064           case bool_parm:
1065             get_bool();
1066             break;
1067           case char_parm:
1068             get_char();
1069             break;
1070           case short_parm:
1071             get_short();
1072             break;
1073           case byte_parm:
1074             get_byte();
1075             break;
1076           case int_parm:
1077             get_int();
1078             break;
1079           case obj_parm:
1080             get_object();
1081             break;
1082           case long_parm:
1083             get_long();
1084             break;
1085           case float_parm:
1086             get_float();
1087             break;
1088           case double_parm:
1089             get_double();
1090             break;
1091           case done_parm:
1092             return;
1093             break;
1094           default:
1095             ShouldNotReachHere();
1096             break;
1097         }
1098         fingerprint >>= parameter_feature_size;
1099       }
1100     }
1101   }
1102 };
1103 
1104 
1105 enum JNICallType {
1106   JNI_STATIC,
1107   JNI_VIRTUAL,
1108   JNI_NONVIRTUAL
1109 };
1110 
1111 
1112 
1113 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1114   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1115 
1116   // Create object to hold arguments for the JavaCall, and associate it with
1117   // the jni parser
1118   ResourceMark rm(THREAD);
1119   int number_of_parameters = method->size_of_parameters();
1120   JavaCallArguments java_args(number_of_parameters);
1121   args->set_java_argument_object(&java_args);
1122 
1123   assert(method->is_static(), "method should be static");
1124 
1125   // Fill out JavaCallArguments object
1126   args->iterate( Fingerprinter(method).fingerprint() );
1127   // Initialize result type
1128   result->set_type(args->get_ret_type());
1129 
1130   // Invoke the method. Result is returned as oop.
1131   JavaCalls::call(result, method, &java_args, CHECK);
1132 
1133   // Convert result
1134   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1135     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1136   }
1137 }
1138 
1139 
1140 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1141   oop recv = JNIHandles::resolve(receiver);
1142   if (recv == NULL) {
1143     THROW(vmSymbols::java_lang_NullPointerException());
1144   }
1145   Handle h_recv(THREAD, recv);
1146 
1147   int number_of_parameters;
1148   Method* selected_method;
1149   {
1150     Method* m = Method::resolve_jmethod_id(method_id);
1151     number_of_parameters = m->size_of_parameters();
1152     Klass* holder = m->method_holder();
1153     if (call_type != JNI_VIRTUAL) {
1154         selected_method = m;
1155     } else if (!m->has_itable_index()) {
1156       // non-interface call -- for that little speed boost, don't handlize
1157       debug_only(NoSafepointVerifier nosafepoint;)
1158       // jni_GetMethodID makes sure class is linked and initialized
1159       // so m should have a valid vtable index.
1160       assert(m->valid_vtable_index(), "no valid vtable index");
1161       int vtbl_index = m->vtable_index();
1162       if (vtbl_index != Method::nonvirtual_vtable_index) {
1163         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1164       } else {
1165         // final method
1166         selected_method = m;
1167       }
1168     } else {
1169       // interface call
1170       int itbl_index = m->itable_index();
1171       Klass* k = h_recv->klass();
1172       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1173     }
1174   }
1175 
1176   methodHandle method(THREAD, selected_method);
1177 
1178   // Create object to hold arguments for the JavaCall, and associate it with
1179   // the jni parser
1180   ResourceMark rm(THREAD);
1181   JavaCallArguments java_args(number_of_parameters);
1182   args->set_java_argument_object(&java_args);
1183 
1184   // handle arguments
1185   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1186   args->push_receiver(h_recv); // Push jobject handle
1187 
1188   // Fill out JavaCallArguments object
1189   args->iterate( Fingerprinter(method).fingerprint() );
1190   // Initialize result type
1191   result->set_type(args->get_ret_type());
1192 
1193   // Invoke the method. Result is returned as oop.
1194   JavaCalls::call(result, method, &java_args, CHECK);
1195 
1196   // Convert result
1197   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1198     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1199   }
1200 }
1201 
1202 
1203 static instanceOop alloc_object(jclass clazz, TRAPS) {
1204   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1205   if (k == NULL) {
1206     ResourceMark rm(THREAD);
1207     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1208   }
1209   k->check_valid_for_instantiation(false, CHECK_NULL);
1210   k->initialize(CHECK_NULL);
1211   instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1212   return ih;
1213 }
1214 
1215 DT_RETURN_MARK_DECL(AllocObject, jobject
1216                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1217 
1218 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1219   JNIWrapper("AllocObject");
1220 
1221   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1222 
1223   jobject ret = NULL;
1224   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1225 
1226   instanceOop i = alloc_object(clazz, CHECK_NULL);
1227   ret = JNIHandles::make_local(env, i);
1228   return ret;
1229 JNI_END
1230 
1231 DT_RETURN_MARK_DECL(NewObjectA, jobject
1232                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1233 
1234 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1235   JNIWrapper("NewObjectA");
1236 
1237   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1238 
1239   jobject obj = NULL;
1240   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1241 
1242   instanceOop i = alloc_object(clazz, CHECK_NULL);
1243   obj = JNIHandles::make_local(env, i);
1244   JavaValue jvalue(T_VOID);
1245   JNI_ArgumentPusherArray ap(methodID, args);
1246   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1247   return obj;
1248 JNI_END
1249 
1250 
1251 DT_RETURN_MARK_DECL(NewObjectV, jobject
1252                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1253 
1254 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1255   JNIWrapper("NewObjectV");
1256 
1257   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1258 
1259   jobject obj = NULL;
1260   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1261 
1262   instanceOop i = alloc_object(clazz, CHECK_NULL);
1263   obj = JNIHandles::make_local(env, i);
1264   JavaValue jvalue(T_VOID);
1265   JNI_ArgumentPusherVaArg ap(methodID, args);
1266   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1267   return obj;
1268 JNI_END
1269 
1270 
1271 DT_RETURN_MARK_DECL(NewObject, jobject
1272                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1273 
1274 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1275   JNIWrapper("NewObject");
1276 
1277   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1278 
1279   jobject obj = NULL;
1280   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1281 
1282   instanceOop i = alloc_object(clazz, CHECK_NULL);
1283   obj = JNIHandles::make_local(env, i);
1284   va_list args;
1285   va_start(args, methodID);
1286   JavaValue jvalue(T_VOID);
1287   JNI_ArgumentPusherVaArg ap(methodID, args);
1288   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1289   va_end(args);
1290   return obj;
1291 JNI_END
1292 
1293 
1294 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1295   JNIWrapper("GetObjectClass");
1296 
1297   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1298 
1299   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1300   jclass ret =
1301     (jclass) JNIHandles::make_local(env, k->java_mirror());
1302 
1303   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1304   return ret;
1305 JNI_END
1306 
1307 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1308   JNIWrapper("IsInstanceOf");
1309 
1310   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1311 
1312   jboolean ret = JNI_TRUE;
1313   if (obj != NULL) {
1314     ret = JNI_FALSE;
1315     Klass* k = java_lang_Class::as_Klass(
1316       JNIHandles::resolve_non_null(clazz));
1317     if (k != NULL) {
1318       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1319     }
1320   }
1321 
1322   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1323   return ret;
1324 JNI_END
1325 
1326 
1327 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1328                                const char *sig, bool is_static, TRAPS) {
1329   // %%%% This code should probably just call into a method in the LinkResolver
1330   //
1331   // The class should have been loaded (we have an instance of the class
1332   // passed in) so the method and signature should already be in the symbol
1333   // table.  If they're not there, the method doesn't exist.
1334   const char *name_to_probe = (name_str == NULL)
1335                         ? vmSymbols::object_initializer_name()->as_C_string()
1336                         : name_str;
1337   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1338   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1339 
1340   if (name == NULL || signature == NULL) {
1341     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1342   }
1343 
1344   // Throw a NoSuchMethodError exception if we have an instance of a
1345   // primitive java.lang.Class
1346   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1347     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1348   }
1349 
1350   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1351 
1352   // Make sure class is linked and initialized before handing id's out to
1353   // Method*s.
1354   klass->initialize(CHECK_NULL);
1355 
1356   Method* m;
1357   if (name == vmSymbols::object_initializer_name() ||
1358       name == vmSymbols::class_initializer_name()) {
1359     // Never search superclasses for constructors
1360     if (klass->is_instance_klass()) {
1361       m = InstanceKlass::cast(klass)->find_method(name, signature);
1362     } else {
1363       m = NULL;
1364     }
1365   } else {
1366     m = klass->lookup_method(name, signature);
1367     if (m == NULL &&  klass->is_instance_klass()) {
1368       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1369     }
1370   }
1371   if (m == NULL || (m->is_static() != is_static)) {
1372     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1373   }
1374   return m->jmethod_id();
1375 }
1376 
1377 
1378 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1379           const char *name, const char *sig))
1380   JNIWrapper("GetMethodID");
1381   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1382   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1383   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1384   return ret;
1385 JNI_END
1386 
1387 
1388 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1389           const char *name, const char *sig))
1390   JNIWrapper("GetStaticMethodID");
1391   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1392   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1393   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1394   return ret;
1395 JNI_END
1396 
1397 
1398 
1399 //
1400 // Calling Methods
1401 //
1402 
1403 
1404 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1405                           , EntryProbe, ReturnProbe)    \
1406 \
1407   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1408                           , ReturnProbe);                          \
1409 \
1410 JNI_ENTRY(ResultType, \
1411           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1412   JNIWrapper("Call" XSTR(Result) "Method"); \
1413 \
1414   EntryProbe; \
1415   ResultType ret = 0;\
1416   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1417                      (const ResultType&)ret);\
1418 \
1419   va_list args; \
1420   va_start(args, methodID); \
1421   JavaValue jvalue(Tag); \
1422   JNI_ArgumentPusherVaArg ap(methodID, args); \
1423   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1424   va_end(args); \
1425   ret = jvalue.get_##ResultType(); \
1426   return ret;\
1427 JNI_END
1428 
1429 // the runtime type of subword integral basic types is integer
1430 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1431                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1434                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1437                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1440                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1442 
1443 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1444                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1446 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1447                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1448                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1449 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1450                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1451                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1452 // Float and double probes don't return value because dtrace doesn't currently support it
1453 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1454                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1455                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1456 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1457                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1458                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1459 
1460 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1461                           , EntryProbe, ReturnProbe)    \
1462 \
1463   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1464                           , ReturnProbe);                          \
1465 \
1466 JNI_ENTRY(ResultType, \
1467           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1468   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1469 \
1470   EntryProbe;\
1471   ResultType ret = 0;\
1472   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1473                      (const ResultType&)ret);\
1474 \
1475   JavaValue jvalue(Tag); \
1476   JNI_ArgumentPusherVaArg ap(methodID, args); \
1477   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1478   ret = jvalue.get_##ResultType(); \
1479   return ret;\
1480 JNI_END
1481 
1482 // the runtime type of subword integral basic types is integer
1483 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1484                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1486 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1487                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1489 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1490                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1493                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1495 
1496 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1497                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1499 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1500                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1501                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1502 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1503                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1504                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1505 // Float and double probes don't return value because dtrace doesn't currently support it
1506 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1507                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1508                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1509 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1510                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1511                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1512 
1513 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1514                           , EntryProbe, ReturnProbe)    \
1515 \
1516   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1517                           , ReturnProbe);                          \
1518 \
1519 JNI_ENTRY(ResultType, \
1520           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1521   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1522   EntryProbe; \
1523   ResultType ret = 0;\
1524   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1525                      (const ResultType&)ret);\
1526 \
1527   JavaValue jvalue(Tag); \
1528   JNI_ArgumentPusherArray ap(methodID, args); \
1529   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1530   ret = jvalue.get_##ResultType(); \
1531   return ret;\
1532 JNI_END
1533 
1534 // the runtime type of subword integral basic types is integer
1535 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1536                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1538 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1539                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1541 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1542                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1545                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1547 
1548 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1549                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1551 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1552                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1553                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1554 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1555                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1556                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1557 // Float and double probes don't return value because dtrace doesn't currently support it
1558 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1559                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1560                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1561 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1562                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1563                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1564 
1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1567 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1568 
1569 
1570 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1571   JNIWrapper("CallVoidMethod");
1572   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1573   DT_VOID_RETURN_MARK(CallVoidMethod);
1574 
1575   va_list args;
1576   va_start(args, methodID);
1577   JavaValue jvalue(T_VOID);
1578   JNI_ArgumentPusherVaArg ap(methodID, args);
1579   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1580   va_end(args);
1581 JNI_END
1582 
1583 
1584 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1585   JNIWrapper("CallVoidMethodV");
1586   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1587   DT_VOID_RETURN_MARK(CallVoidMethodV);
1588 
1589   JavaValue jvalue(T_VOID);
1590   JNI_ArgumentPusherVaArg ap(methodID, args);
1591   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1592 JNI_END
1593 
1594 
1595 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1596   JNIWrapper("CallVoidMethodA");
1597   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1598   DT_VOID_RETURN_MARK(CallVoidMethodA);
1599 
1600   JavaValue jvalue(T_VOID);
1601   JNI_ArgumentPusherArray ap(methodID, args);
1602   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1603 JNI_END
1604 
1605 
1606 
1607 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1608                                     , EntryProbe, ReturnProbe)      \
1609 \
1610   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1611                           , ReturnProbe);\
1612 \
1613 JNI_ENTRY(ResultType, \
1614           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1615   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1616 \
1617   EntryProbe;\
1618   ResultType ret;\
1619   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1620                      (const ResultType&)ret);\
1621 \
1622   va_list args; \
1623   va_start(args, methodID); \
1624   JavaValue jvalue(Tag); \
1625   JNI_ArgumentPusherVaArg ap(methodID, args); \
1626   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1627   va_end(args); \
1628   ret = jvalue.get_##ResultType(); \
1629   return ret;\
1630 JNI_END
1631 
1632 // the runtime type of subword integral basic types is integer
1633 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1634                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1636 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1637                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1639 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1640                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1643                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1645 
1646 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1647                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1649 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1650                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1651                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1652 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1653                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1654 // Float and double probes don't return value because dtrace doesn't currently support it
1655                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1656 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1657                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1658                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1659 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1660                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1661                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1662 
1663 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1664                                     , EntryProbe, ReturnProbe)      \
1665 \
1666   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1667                           , ReturnProbe);\
1668 \
1669 JNI_ENTRY(ResultType, \
1670           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1671   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1672 \
1673   EntryProbe;\
1674   ResultType ret;\
1675   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1676                      (const ResultType&)ret);\
1677 \
1678   JavaValue jvalue(Tag); \
1679   JNI_ArgumentPusherVaArg ap(methodID, args); \
1680   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1681   ret = jvalue.get_##ResultType(); \
1682   return ret;\
1683 JNI_END
1684 
1685 // the runtime type of subword integral basic types is integer
1686 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1687                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1689 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1690                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1692 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1693                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1696                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1698 
1699 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1700                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1702 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1703                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1704                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1705 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1706                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1707 // Float and double probes don't return value because dtrace doesn't currently support it
1708                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1709 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1710                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1711                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1712 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1713                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1714                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1715 
1716 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1717                                     , EntryProbe, ReturnProbe)      \
1718 \
1719   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1720                           , ReturnProbe);\
1721 \
1722 JNI_ENTRY(ResultType, \
1723           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1724   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1725 \
1726   EntryProbe;\
1727   ResultType ret;\
1728   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1729                      (const ResultType&)ret);\
1730 \
1731   JavaValue jvalue(Tag); \
1732   JNI_ArgumentPusherArray ap(methodID, args); \
1733   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1734   ret = jvalue.get_##ResultType(); \
1735   return ret;\
1736 JNI_END
1737 
1738 // the runtime type of subword integral basic types is integer
1739 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1740                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1742 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1743                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1745 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1746                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1749                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1751 
1752 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1753                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1755 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1756                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1757                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1758 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1759                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1760 // Float and double probes don't return value because dtrace doesn't currently support it
1761                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1762 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1763                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1764                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1765 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1766                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1767                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1768 
1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1770                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1771 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1772                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1773 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1774                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1775 
1776 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1777   JNIWrapper("CallNonvirtualVoidMethod");
1778 
1779   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1780   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1781 
1782   va_list args;
1783   va_start(args, methodID);
1784   JavaValue jvalue(T_VOID);
1785   JNI_ArgumentPusherVaArg ap(methodID, args);
1786   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1787   va_end(args);
1788 JNI_END
1789 
1790 
1791 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1792   JNIWrapper("CallNonvirtualVoidMethodV");
1793 
1794   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1795                env, obj, cls, (uintptr_t) methodID);
1796   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1797 
1798   JavaValue jvalue(T_VOID);
1799   JNI_ArgumentPusherVaArg ap(methodID, args);
1800   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1801 JNI_END
1802 
1803 
1804 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1805   JNIWrapper("CallNonvirtualVoidMethodA");
1806   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1807                 env, obj, cls, (uintptr_t) methodID);
1808   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1809   JavaValue jvalue(T_VOID);
1810   JNI_ArgumentPusherArray ap(methodID, args);
1811   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1812 JNI_END
1813 
1814 
1815 
1816 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1817                                 , EntryProbe, ResultProbe) \
1818 \
1819   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1820                           , ResultProbe);                               \
1821 \
1822 JNI_ENTRY(ResultType, \
1823           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1824   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1825 \
1826   EntryProbe; \
1827   ResultType ret = 0;\
1828   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1829                      (const ResultType&)ret);\
1830 \
1831   va_list args; \
1832   va_start(args, methodID); \
1833   JavaValue jvalue(Tag); \
1834   JNI_ArgumentPusherVaArg ap(methodID, args); \
1835   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1836   va_end(args); \
1837   ret = jvalue.get_##ResultType(); \
1838   return ret;\
1839 JNI_END
1840 
1841 // the runtime type of subword integral basic types is integer
1842 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1843                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1845 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1846                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1848 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1849                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1851 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1852                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1854 
1855 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1856                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1858 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1859                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1860                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1861 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1862                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1863                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1864 // Float and double probes don't return value because dtrace doesn't currently support it
1865 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1866                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1867                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1868 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1869                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1870                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1871 
1872 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1873                                 , EntryProbe, ResultProbe) \
1874 \
1875   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1876                           , ResultProbe);                               \
1877 \
1878 JNI_ENTRY(ResultType, \
1879           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1880   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1881 \
1882   EntryProbe; \
1883   ResultType ret = 0;\
1884   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1885                      (const ResultType&)ret);\
1886 \
1887   JavaValue jvalue(Tag); \
1888   JNI_ArgumentPusherVaArg ap(methodID, args); \
1889   /* Make sure class is initialized before trying to invoke its method */ \
1890   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1891   k->initialize(CHECK_0); \
1892   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1893   va_end(args); \
1894   ret = jvalue.get_##ResultType(); \
1895   return ret;\
1896 JNI_END
1897 
1898 // the runtime type of subword integral basic types is integer
1899 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1900                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1902 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1903                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1905 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1906                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1908 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1909                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1911 
1912 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1913                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1915 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1916                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1917                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1918 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1919                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1920                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1921 // Float and double probes don't return value because dtrace doesn't currently support it
1922 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1923                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1924                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1925 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1926                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1927                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1928 
1929 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1930                                 , EntryProbe, ResultProbe) \
1931 \
1932   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1933                           , ResultProbe);                               \
1934 \
1935 JNI_ENTRY(ResultType, \
1936           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1937   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1938 \
1939   EntryProbe; \
1940   ResultType ret = 0;\
1941   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1942                      (const ResultType&)ret);\
1943 \
1944   JavaValue jvalue(Tag); \
1945   JNI_ArgumentPusherArray ap(methodID, args); \
1946   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1947   ret = jvalue.get_##ResultType(); \
1948   return ret;\
1949 JNI_END
1950 
1951 // the runtime type of subword integral basic types is integer
1952 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1953                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1955 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1956                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1958 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1959                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1961 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1962                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1964 
1965 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1966                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1968 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1969                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1970                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1971 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1972                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1973                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1974 // Float and double probes don't return value because dtrace doesn't currently support it
1975 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1976                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1977                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1978 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1979                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1980                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1981 
1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1983                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1984 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1985                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1986 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1987                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1988 
1989 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1990   JNIWrapper("CallStaticVoidMethod");
1991   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1992   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1993 
1994   va_list args;
1995   va_start(args, methodID);
1996   JavaValue jvalue(T_VOID);
1997   JNI_ArgumentPusherVaArg ap(methodID, args);
1998   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1999   va_end(args);
2000 JNI_END
2001 
2002 
2003 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2004   JNIWrapper("CallStaticVoidMethodV");
2005   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2006   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2007 
2008   JavaValue jvalue(T_VOID);
2009   JNI_ArgumentPusherVaArg ap(methodID, args);
2010   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2011 JNI_END
2012 
2013 
2014 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2015   JNIWrapper("CallStaticVoidMethodA");
2016   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2017   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2018 
2019   JavaValue jvalue(T_VOID);
2020   JNI_ArgumentPusherArray ap(methodID, args);
2021   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2022 JNI_END
2023 
2024 
2025 //
2026 // Accessing Fields
2027 //
2028 
2029 
2030 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2031                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2032 
2033 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2034           const char *name, const char *sig))
2035   JNIWrapper("GetFieldID");
2036   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2037   jfieldID ret = 0;
2038   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2039 
2040   // The class should have been loaded (we have an instance of the class
2041   // passed in) so the field and signature should already be in the symbol
2042   // table.  If they're not there, the field doesn't exist.
2043   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2044   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2045   if (fieldname == NULL || signame == NULL) {
2046     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2047   }
2048   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2049   // Make sure class is initialized before handing id's out to fields
2050   k->initialize(CHECK_NULL);
2051 
2052   fieldDescriptor fd;
2053   if (!k->is_instance_klass() ||
2054       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2055     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2056   }
2057 
2058   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2059   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2060   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2061   return ret;
2062 JNI_END
2063 
2064 
2065 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2066   JNIWrapper("GetObjectField");
2067   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2068   oop o = JNIHandles::resolve_non_null(obj);
2069   Klass* k = o->klass();
2070   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2071   // Keep JVMTI addition small and only check enabled flag here.
2072   // jni_GetField_probe() assumes that is okay to create handles.
2073   if (JvmtiExport::should_post_field_access()) {
2074     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2075   }
2076   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2077 #if INCLUDE_ALL_GCS
2078   // If G1 is enabled and we are accessing the value of the referent
2079   // field in a reference object then we need to register a non-null
2080   // referent with the SATB barrier.
2081   if (UseG1GC) {
2082     bool needs_barrier = false;
2083 
2084     if (ret != NULL &&
2085         offset == java_lang_ref_Reference::referent_offset &&
2086         InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2087       assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2088       needs_barrier = true;
2089     }
2090 
2091     if (needs_barrier) {
2092       oop referent = JNIHandles::resolve(ret);
2093       G1SATBCardTableModRefBS::enqueue(referent);
2094     }
2095   }
2096 #endif // INCLUDE_ALL_GCS
2097 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2098   return ret;
2099 JNI_END
2100 
2101 
2102 
2103 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2104   , EntryProbe, ReturnProbe) \
2105 \
2106   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2107   , ReturnProbe); \
2108 \
2109 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2110   JNIWrapper("Get" XSTR(Result) "Field"); \
2111 \
2112   EntryProbe; \
2113   Return ret = 0;\
2114   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2115 \
2116   oop o = JNIHandles::resolve_non_null(obj); \
2117   Klass* k = o->klass(); \
2118   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2119   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2120   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2121   /* and creates a ResetNoHandleMark.                                   */ \
2122   if (JvmtiExport::should_post_field_access()) { \
2123     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2124   } \
2125   ret = o->Fieldname##_field(offset); \
2126   return ret; \
2127 JNI_END
2128 
2129 DEFINE_GETFIELD(jboolean, bool,   Boolean
2130                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2131                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2132 DEFINE_GETFIELD(jbyte,    byte,   Byte
2133                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2134                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2135 DEFINE_GETFIELD(jchar,    char,   Char
2136                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2137                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2138 DEFINE_GETFIELD(jshort,   short,  Short
2139                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2140                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2141 DEFINE_GETFIELD(jint,     int,    Int
2142                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2143                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2144 DEFINE_GETFIELD(jlong,    long,   Long
2145                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2146                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2147 // Float and double probes don't return value because dtrace doesn't currently support it
2148 DEFINE_GETFIELD(jfloat,   float,  Float
2149                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2150                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2151 DEFINE_GETFIELD(jdouble,  double, Double
2152                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2153                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2154 
2155 address jni_GetBooleanField_addr() {
2156   return (address)jni_GetBooleanField;
2157 }
2158 address jni_GetByteField_addr() {
2159   return (address)jni_GetByteField;
2160 }
2161 address jni_GetCharField_addr() {
2162   return (address)jni_GetCharField;
2163 }
2164 address jni_GetShortField_addr() {
2165   return (address)jni_GetShortField;
2166 }
2167 address jni_GetIntField_addr() {
2168   return (address)jni_GetIntField;
2169 }
2170 address jni_GetLongField_addr() {
2171   return (address)jni_GetLongField;
2172 }
2173 address jni_GetFloatField_addr() {
2174   return (address)jni_GetFloatField;
2175 }
2176 address jni_GetDoubleField_addr() {
2177   return (address)jni_GetDoubleField;
2178 }
2179 
2180 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2181   JNIWrapper("SetObjectField");
2182   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2183   oop o = JNIHandles::resolve_non_null(obj);
2184   Klass* k = o->klass();
2185   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2186   // Keep JVMTI addition small and only check enabled flag here.
2187   // jni_SetField_probe_nh() assumes that is not okay to create handles
2188   // and creates a ResetNoHandleMark.
2189   if (JvmtiExport::should_post_field_modification()) {
2190     jvalue field_value;
2191     field_value.l = value;
2192     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2193   }
2194   o->obj_field_put(offset, JNIHandles::resolve(value));
2195   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2196 JNI_END
2197 
2198 
2199 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2200                         , EntryProbe, ReturnProbe) \
2201 \
2202 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2203   JNIWrapper("Set" XSTR(Result) "Field"); \
2204 \
2205   EntryProbe; \
2206 \
2207   oop o = JNIHandles::resolve_non_null(obj); \
2208   Klass* k = o->klass(); \
2209   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2210   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2211   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2212   /* and creates a ResetNoHandleMark.                                   */ \
2213   if (JvmtiExport::should_post_field_modification()) { \
2214     jvalue field_value; \
2215     field_value.unionType = value; \
2216     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2217   } \
2218   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2219   o->Fieldname##_field_put(offset, value); \
2220   ReturnProbe; \
2221 JNI_END
2222 
2223 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2224                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2225                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2226 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2227                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2228                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2229 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2230                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2231                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2232 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2233                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2234                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2235 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2236                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2237                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2238 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2239                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2240                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2241 // Float and double probes don't return value because dtrace doesn't currently support it
2242 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2243                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2244                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2245 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2246                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2247                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2248 
2249 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2250                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2251 
2252 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2253   JNIWrapper("ToReflectedField");
2254   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2255   jobject ret = NULL;
2256   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2257 
2258   fieldDescriptor fd;
2259   bool found = false;
2260   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2261 
2262   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2263 
2264   if (isStatic) {
2265     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2266     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2267     assert(id->is_static_field_id(), "invalid static field id");
2268     found = id->find_local_field(&fd);
2269   } else {
2270     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2271     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2272     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2273   }
2274   assert(found, "bad fieldID passed into jni_ToReflectedField");
2275   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2276   ret = JNIHandles::make_local(env, reflected);
2277   return ret;
2278 JNI_END
2279 
2280 
2281 //
2282 // Accessing Static Fields
2283 //
2284 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2285                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2286 
2287 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2288           const char *name, const char *sig))
2289   JNIWrapper("GetStaticFieldID");
2290   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2291   jfieldID ret = NULL;
2292   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2293 
2294   // The class should have been loaded (we have an instance of the class
2295   // passed in) so the field and signature should already be in the symbol
2296   // table.  If they're not there, the field doesn't exist.
2297   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2298   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2299   if (fieldname == NULL || signame == NULL) {
2300     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2301   }
2302   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2303   // Make sure class is initialized before handing id's out to static fields
2304   k->initialize(CHECK_NULL);
2305 
2306   fieldDescriptor fd;
2307   if (!k->is_instance_klass() ||
2308       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2309     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2310   }
2311 
2312   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2313   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2314   debug_only(id->set_is_static_field_id();)
2315 
2316   debug_only(id->verify(fd.field_holder()));
2317 
2318   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2319   return ret;
2320 JNI_END
2321 
2322 
2323 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2324   JNIWrapper("GetStaticObjectField");
2325   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2326 #if INCLUDE_JNI_CHECK
2327   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2328 #endif // INCLUDE_JNI_CHECK
2329   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2330   assert(id->is_static_field_id(), "invalid static field id");
2331   // Keep JVMTI addition small and only check enabled flag here.
2332   // jni_GetField_probe() assumes that is okay to create handles.
2333   if (JvmtiExport::should_post_field_access()) {
2334     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2335   }
2336   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2337   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2338   return ret;
2339 JNI_END
2340 
2341 
2342 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2343                               , EntryProbe, ReturnProbe) \
2344 \
2345   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2346                           , ReturnProbe);                                          \
2347 \
2348 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2349   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2350   EntryProbe; \
2351   Return ret = 0;\
2352   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2353                      (const Return&)ret);\
2354   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2355   assert(id->is_static_field_id(), "invalid static field id"); \
2356   /* Keep JVMTI addition small and only check enabled flag here. */ \
2357   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2358   if (JvmtiExport::should_post_field_access()) { \
2359     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2360   } \
2361   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2362   return ret;\
2363 JNI_END
2364 
2365 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2366                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2367 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2368                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2369 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2370                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2371 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2372                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2373 DEFINE_GETSTATICFIELD(jint,     int,    Int
2374                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2375 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2376                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2377 // Float and double probes don't return value because dtrace doesn't currently support it
2378 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2379                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2380 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2381                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2382 
2383 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2384   JNIWrapper("SetStaticObjectField");
2385  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2386   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2387   assert(id->is_static_field_id(), "invalid static field id");
2388   // Keep JVMTI addition small and only check enabled flag here.
2389   // jni_SetField_probe() assumes that is okay to create handles.
2390   if (JvmtiExport::should_post_field_modification()) {
2391     jvalue field_value;
2392     field_value.l = value;
2393     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2394   }
2395   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2396   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2397 JNI_END
2398 
2399 
2400 
2401 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2402                               , EntryProbe, ReturnProbe) \
2403 \
2404 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2405   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2406   EntryProbe; \
2407 \
2408   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2409   assert(id->is_static_field_id(), "invalid static field id"); \
2410   /* Keep JVMTI addition small and only check enabled flag here. */ \
2411   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2412   if (JvmtiExport::should_post_field_modification()) { \
2413     jvalue field_value; \
2414     field_value.unionType = value; \
2415     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2416   } \
2417   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2418   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2419   ReturnProbe;\
2420 JNI_END
2421 
2422 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2423                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2424                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2426                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2428 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2429                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2430                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2432                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2433                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2434 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2435                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2436                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2437 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2438                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2439                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2440 // Float and double probes don't return value because dtrace doesn't currently support it
2441 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2442                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2443                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2444 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2445                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2446                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2447 
2448 //
2449 // String Operations
2450 //
2451 
2452 // Unicode Interface
2453 
2454 DT_RETURN_MARK_DECL(NewString, jstring
2455                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2456 
2457 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2458   JNIWrapper("NewString");
2459  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2460   jstring ret = NULL;
2461   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2462   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2463   ret = (jstring) JNIHandles::make_local(env, string);
2464   return ret;
2465 JNI_END
2466 
2467 
2468 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2469   JNIWrapper("GetStringLength");
2470   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2471   jsize ret = 0;
2472   oop s = JNIHandles::resolve_non_null(string);
2473   if (java_lang_String::value(s) != NULL) {
2474     ret = java_lang_String::length(s);
2475   }
2476  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2477   return ret;
2478 JNI_END
2479 
2480 
2481 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2482   JNIEnv *env, jstring string, jboolean *isCopy))
2483   JNIWrapper("GetStringChars");
2484  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2485   jchar* buf = NULL;
2486   oop s = JNIHandles::resolve_non_null(string);
2487   typeArrayOop s_value = java_lang_String::value(s);
2488   if (s_value != NULL) {
2489     int s_len = java_lang_String::length(s);
2490     bool is_latin1 = java_lang_String::is_latin1(s);
2491     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2492     /* JNI Specification states return NULL on OOM */
2493     if (buf != NULL) {
2494       if (s_len > 0) {
2495         if (!is_latin1) {
2496           memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2497         } else {
2498           for (int i = 0; i < s_len; i++) {
2499             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2500           }
2501         }
2502       }
2503       buf[s_len] = 0;
2504       //%note jni_5
2505       if (isCopy != NULL) {
2506         *isCopy = JNI_TRUE;
2507       }
2508     }
2509   }
2510   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2511   return buf;
2512 JNI_END
2513 
2514 
2515 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2516   JNIWrapper("ReleaseStringChars");
2517   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2518   //%note jni_6
2519   if (chars != NULL) {
2520     // Since String objects are supposed to be immutable, don't copy any
2521     // new data back.  A bad user will have to go after the char array.
2522     FreeHeap((void*) chars);
2523   }
2524   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2525 JNI_END
2526 
2527 
2528 // UTF Interface
2529 
2530 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2531                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2532 
2533 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2534   JNIWrapper("NewStringUTF");
2535   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2536   jstring ret;
2537   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2538 
2539   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2540   ret = (jstring) JNIHandles::make_local(env, result);
2541   return ret;
2542 JNI_END
2543 
2544 
2545 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2546   JNIWrapper("GetStringUTFLength");
2547  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2548   jsize ret = 0;
2549   oop java_string = JNIHandles::resolve_non_null(string);
2550   if (java_lang_String::value(java_string) != NULL) {
2551     ret = java_lang_String::utf8_length(java_string);
2552   }
2553   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2554   return ret;
2555 JNI_END
2556 
2557 
2558 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2559   JNIWrapper("GetStringUTFChars");
2560  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2561   char* result = NULL;
2562   oop java_string = JNIHandles::resolve_non_null(string);
2563   if (java_lang_String::value(java_string) != NULL) {
2564     size_t length = java_lang_String::utf8_length(java_string);
2565     /* JNI Specification states return NULL on OOM */
2566     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2567     if (result != NULL) {
2568       java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2569       if (isCopy != NULL) {
2570         *isCopy = JNI_TRUE;
2571       }
2572     }
2573   }
2574  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2575   return result;
2576 JNI_END
2577 
2578 
2579 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2580   JNIWrapper("ReleaseStringUTFChars");
2581  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2582   if (chars != NULL) {
2583     FreeHeap((char*) chars);
2584   }
2585 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2586 JNI_END
2587 
2588 
2589 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2590   JNIWrapper("GetArrayLength");
2591  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2592   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2593   assert(a->is_array(), "must be array");
2594   jsize ret = a->length();
2595  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2596   return ret;
2597 JNI_END
2598 
2599 
2600 //
2601 // Object Array Operations
2602 //
2603 
2604 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2605                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2606 
2607 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2608   JNIWrapper("NewObjectArray");
2609  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2610   jobjectArray ret = NULL;
2611   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2612   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2613   Klass* ak = ek->array_klass(CHECK_NULL);
2614   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2615   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2616   oop initial_value = JNIHandles::resolve(initialElement);
2617   if (initial_value != NULL) {  // array already initialized with NULL
2618     for (int index = 0; index < length; index++) {
2619       result->obj_at_put(index, initial_value);
2620     }
2621   }
2622   ret = (jobjectArray) JNIHandles::make_local(env, result);
2623   return ret;
2624 JNI_END
2625 
2626 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2627                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2628 
2629 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2630   JNIWrapper("GetObjectArrayElement");
2631  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2632   jobject ret = NULL;
2633   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2634   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2635   if (a->is_within_bounds(index)) {
2636     ret = JNIHandles::make_local(env, a->obj_at(index));
2637     return ret;
2638   } else {
2639     char buf[jintAsStringSize];
2640     sprintf(buf, "%d", index);
2641     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2642   }
2643 JNI_END
2644 
2645 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2646                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2647 
2648 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2649   JNIWrapper("SetObjectArrayElement");
2650  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2651   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2652 
2653   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2654   oop v = JNIHandles::resolve(value);
2655   if (a->is_within_bounds(index)) {
2656     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2657       a->obj_at_put(index, v);
2658     } else {
2659       THROW(vmSymbols::java_lang_ArrayStoreException());
2660     }
2661   } else {
2662     char buf[jintAsStringSize];
2663     sprintf(buf, "%d", index);
2664     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2665   }
2666 JNI_END
2667 
2668 
2669 
2670 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2671                               ,EntryProbe,ReturnProbe)  \
2672 \
2673   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2674                       , ReturnProbe); \
2675 \
2676 JNI_ENTRY(Return, \
2677           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2678   JNIWrapper("New" XSTR(Result) "Array"); \
2679   EntryProbe; \
2680   Return ret = NULL;\
2681   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2682 \
2683   oop obj= oopFactory::Allocator(len, CHECK_0); \
2684   ret = (Return) JNIHandles::make_local(env, obj); \
2685   return ret;\
2686 JNI_END
2687 
2688 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2689                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2690                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2692                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2693                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2694 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2695                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2696                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2697 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2698                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2699                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2700 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2701                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2702                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2703 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2704                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2705                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2706 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float,
2707                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2708                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2709 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2710                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2711                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2712 
2713 // Return an address which will fault if the caller writes to it.
2714 
2715 static char* get_bad_address() {
2716   static char* bad_address = NULL;
2717   if (bad_address == NULL) {
2718     size_t size = os::vm_allocation_granularity();
2719     bad_address = os::reserve_memory(size);
2720     if (bad_address != NULL) {
2721       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2722                          /*is_committed*/false);
2723       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2724     }
2725   }
2726   return bad_address;
2727 }
2728 
2729 
2730 
2731 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2732                                       , EntryProbe, ReturnProbe) \
2733 \
2734 JNI_QUICK_ENTRY(ElementType*, \
2735           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2736   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2737   EntryProbe; \
2738   /* allocate an chunk of memory in c land */ \
2739   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2740   ElementType* result; \
2741   int len = a->length(); \
2742   if (len == 0) { \
2743     /* Empty array: legal but useless, can't return NULL. \
2744      * Return a pointer to something useless. \
2745      * Avoid asserts in typeArrayOop. */ \
2746     result = (ElementType*)get_bad_address(); \
2747   } else { \
2748     /* JNI Specification states return NULL on OOM */                    \
2749     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2750     if (result != NULL) {                                                \
2751       /* copy the array to the c chunk */                                \
2752       memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len);      \
2753       if (isCopy) {                                                      \
2754         *isCopy = JNI_TRUE;                                              \
2755       }                                                                  \
2756     }                                                                    \
2757   } \
2758   ReturnProbe; \
2759   return result; \
2760 JNI_END
2761 
2762 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2763                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2764                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2765 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2766                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2767                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2768 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2769                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2770                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2771 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2772                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2773                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2774 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2775                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2776                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2777 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2778                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2779                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2780 // Float and double probes don't return value because dtrace doesn't currently support it
2781 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2782                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2783                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2784 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2785                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2786                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2787 
2788 
2789 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2790                                           , EntryProbe, ReturnProbe);\
2791 \
2792 JNI_QUICK_ENTRY(void, \
2793           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2794                                              ElementType *buf, jint mode)) \
2795   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2796   EntryProbe; \
2797   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2798   int len = a->length(); \
2799   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2800     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2801       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2802     } \
2803     if ((mode == 0) || (mode == JNI_ABORT)) { \
2804       FreeHeap(buf); \
2805     } \
2806   } \
2807   ReturnProbe; \
2808 JNI_END
2809 
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2811                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2812                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2814                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2815                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2817                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2818                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2820                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2821                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2823                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2824                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2826                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2827                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2829                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2830                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2831 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2832                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2833                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2834 
2835 
2836 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2837                                     , EntryProbe, ReturnProbe); \
2838   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2839                            , ReturnProbe); \
2840 \
2841 JNI_ENTRY(void, \
2842 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2843              jsize len, ElementType *buf)) \
2844   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2845   EntryProbe; \
2846   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2847   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2848   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2849     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2850   } else { \
2851     if (len > 0) { \
2852       int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2853       memcpy((u_char*) buf, \
2854              (u_char*) src->Tag##_at_addr(start), \
2855              len << sc);                          \
2856     } \
2857   } \
2858 JNI_END
2859 
2860 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2861                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2862                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2864                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2865                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2867                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2868                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2870                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2871                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2873                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2874                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2875 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2876                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2877                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2878 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2879                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2880                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2881 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2882                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2883                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2884 
2885 
2886 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2887                                     , EntryProbe, ReturnProbe); \
2888   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2889                            ,ReturnProbe);           \
2890 \
2891 JNI_ENTRY(void, \
2892 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2893              jsize len, const ElementType *buf)) \
2894   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2895   EntryProbe; \
2896   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2897   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2898   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2899     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2900   } else { \
2901     if (len > 0) { \
2902       int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2903       memcpy((u_char*) dst->Tag##_at_addr(start), \
2904              (u_char*) buf, \
2905              len << sc);    \
2906     } \
2907   } \
2908 JNI_END
2909 
2910 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2911                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2912                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2914                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2915                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2917                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2918                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2920                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2921                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2922 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2923                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2924                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2925 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2926                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2927                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2928 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2929                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2930                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2931 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2932                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2933                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2934 
2935 
2936 //
2937 // Interception of natives
2938 //
2939 
2940 // The RegisterNatives call being attempted tried to register with a method that
2941 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2942 // to see if the native method is now wrapped with the prefixes.  See the
2943 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2944 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2945 #if INCLUDE_JVMTI
2946   ResourceMark rm(THREAD);
2947   Method* method;
2948   int name_len = name->utf8_length();
2949   char* name_str = name->as_utf8();
2950   int prefix_count;
2951   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2952   for (int i = 0; i < prefix_count; i++) {
2953     char* prefix = prefixes[i];
2954     int prefix_len = (int)strlen(prefix);
2955 
2956     // try adding this prefix to the method name and see if it matches another method name
2957     int trial_len = name_len + prefix_len;
2958     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2959     strcpy(trial_name_str, prefix);
2960     strcat(trial_name_str, name_str);
2961     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2962     if (trial_name == NULL) {
2963       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2964     }
2965     method = k->lookup_method(trial_name, signature);
2966     if (method == NULL) {
2967       continue; // signature doesn't match, try the next prefix
2968     }
2969     if (method->is_native()) {
2970       method->set_is_prefixed_native();
2971       return method; // wahoo, we found a prefixed version of the method, return it
2972     }
2973     // found as non-native, so prefix is good, add it, probably just need more prefixes
2974     name_len = trial_len;
2975     name_str = trial_name_str;
2976   }
2977 #endif // INCLUDE_JVMTI
2978   return NULL; // not found
2979 }
2980 
2981 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2982   Method* method = k->lookup_method(name, signature);
2983   if (method == NULL) {
2984     ResourceMark rm;
2985     stringStream st;
2986     st.print("Method %s name or signature does not match",
2987              Method::name_and_sig_as_C_string(k, name, signature));
2988     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2989   }
2990   if (!method->is_native()) {
2991     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2992     method = find_prefixed_native(k, name, signature, THREAD);
2993     if (method == NULL) {
2994       ResourceMark rm;
2995       stringStream st;
2996       st.print("Method %s is not declared as native",
2997                Method::name_and_sig_as_C_string(k, name, signature));
2998       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2999     }
3000   }
3001 
3002   if (entry != NULL) {
3003     method->set_native_function(entry,
3004       Method::native_bind_event_is_interesting);
3005   } else {
3006     method->clear_native_function();
3007   }
3008   if (PrintJNIResolving) {
3009     ResourceMark rm(THREAD);
3010     tty->print_cr("[Registering JNI native method %s.%s]",
3011       method->method_holder()->external_name(),
3012       method->name()->as_C_string());
3013   }
3014   return true;
3015 }
3016 
3017 DT_RETURN_MARK_DECL(RegisterNatives, jint
3018                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3019 
3020 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3021                                     const JNINativeMethod *methods,
3022                                     jint nMethods))
3023   JNIWrapper("RegisterNatives");
3024   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3025   jint ret = 0;
3026   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3027 
3028   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3029 
3030   for (int index = 0; index < nMethods; index++) {
3031     const char* meth_name = methods[index].name;
3032     const char* meth_sig = methods[index].signature;
3033     int meth_name_len = (int)strlen(meth_name);
3034 
3035     // The class should have been loaded (we have an instance of the class
3036     // passed in) so the method and signature should already be in the symbol
3037     // table.  If they're not there, the method doesn't exist.
3038     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3039     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3040 
3041     if (name == NULL || signature == NULL) {
3042       ResourceMark rm;
3043       stringStream st;
3044       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3045       // Must return negative value on failure
3046       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3047     }
3048 
3049     bool res = register_native(k, name, signature,
3050                                (address) methods[index].fnPtr, THREAD);
3051     if (!res) {
3052       ret = -1;
3053       break;
3054     }
3055   }
3056   return ret;
3057 JNI_END
3058 
3059 
3060 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3061   JNIWrapper("UnregisterNatives");
3062  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3063   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3064   //%note jni_2
3065   if (k->is_instance_klass()) {
3066     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3067       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3068       if (m->is_native()) {
3069         m->clear_native_function();
3070         m->set_signature_handler(NULL);
3071       }
3072     }
3073   }
3074  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3075   return 0;
3076 JNI_END
3077 
3078 //
3079 // Monitor functions
3080 //
3081 
3082 DT_RETURN_MARK_DECL(MonitorEnter, jint
3083                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3084 
3085 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3086  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3087   jint ret = JNI_ERR;
3088   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3089 
3090   // If the object is null, we can't do anything with it
3091   if (jobj == NULL) {
3092     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3093   }
3094 
3095   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3096   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3097   ret = JNI_OK;
3098   return ret;
3099 JNI_END
3100 
3101 DT_RETURN_MARK_DECL(MonitorExit, jint
3102                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3103 
3104 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3105  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3106   jint ret = JNI_ERR;
3107   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3108 
3109   // Don't do anything with a null object
3110   if (jobj == NULL) {
3111     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3112   }
3113 
3114   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3115   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3116 
3117   ret = JNI_OK;
3118   return ret;
3119 JNI_END
3120 
3121 //
3122 // Extensions
3123 //
3124 
3125 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3126                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3127 
3128 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3129   JNIWrapper("GetStringRegion");
3130  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3131   DT_VOID_RETURN_MARK(GetStringRegion);
3132   oop s = JNIHandles::resolve_non_null(string);
3133   int s_len = java_lang_String::length(s);
3134   if (start < 0 || len < 0 || start + len > s_len) {
3135     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3136   } else {
3137     if (len > 0) {
3138       typeArrayOop s_value = java_lang_String::value(s);
3139       bool is_latin1 = java_lang_String::is_latin1(s);
3140       if (!is_latin1) {
3141         memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3142       } else {
3143         for (int i = 0; i < len; i++) {
3144           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3145         }
3146       }
3147     }
3148   }
3149 JNI_END
3150 
3151 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3152                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3153 
3154 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3155   JNIWrapper("GetStringUTFRegion");
3156  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3157   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3158   oop s = JNIHandles::resolve_non_null(string);
3159   int s_len = java_lang_String::length(s);
3160   if (start < 0 || len < 0 || start + len > s_len) {
3161     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3162   } else {
3163     //%note jni_7
3164     if (len > 0) {
3165       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3166       java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3167       // as_utf8_string null-terminates the result string
3168     } else {
3169       // JDK null-terminates the buffer even in len is zero
3170       if (buf != NULL) {
3171         buf[0] = 0;
3172       }
3173     }
3174   }
3175 JNI_END
3176 
3177 
3178 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3179   JNIWrapper("GetPrimitiveArrayCritical");
3180  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3181   GCLocker::lock_critical(thread);
3182   if (isCopy != NULL) {
3183     *isCopy = JNI_FALSE;
3184   }
3185   oop a = JNIHandles::resolve_non_null(array);
3186   assert(a->is_array(), "just checking");
3187   BasicType type;
3188   if (a->is_objArray()) {
3189     type = T_OBJECT;
3190   } else {
3191     type = TypeArrayKlass::cast(a->klass())->element_type();
3192   }
3193   void* ret = arrayOop(a)->base(type);
3194  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3195   return ret;
3196 JNI_END
3197 
3198 
3199 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3200   JNIWrapper("ReleasePrimitiveArrayCritical");
3201   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3202   // The array, carray and mode arguments are ignored
3203   GCLocker::unlock_critical(thread);
3204 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3205 JNI_END
3206 
3207 
3208 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3209   JNIWrapper("GetStringCritical");
3210   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3211   GCLocker::lock_critical(thread);
3212   oop s = JNIHandles::resolve_non_null(string);
3213   typeArrayOop s_value = java_lang_String::value(s);
3214   bool is_latin1 = java_lang_String::is_latin1(s);
3215   if (isCopy != NULL) {
3216     *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3217   }
3218   jchar* ret;
3219   if (!is_latin1) {
3220     ret = (jchar*) s_value->base(T_CHAR);
3221   } else {
3222     // Inflate latin1 encoded string to UTF16
3223     int s_len = java_lang_String::length(s);
3224     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
3225     /* JNI Specification states return NULL on OOM */
3226     if (ret != NULL) {
3227       for (int i = 0; i < s_len; i++) {
3228         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3229       }
3230       ret[s_len] = 0;
3231     }
3232   }
3233  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3234   return ret;
3235 JNI_END
3236 
3237 
3238 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3239   JNIWrapper("ReleaseStringCritical");
3240   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3241   // The str and chars arguments are ignored for UTF16 strings
3242   oop s = JNIHandles::resolve_non_null(str);
3243   bool is_latin1 = java_lang_String::is_latin1(s);
3244   if (is_latin1) {
3245     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3246     // This assumes that ReleaseStringCritical bookends GetStringCritical.
3247     FREE_C_HEAP_ARRAY(jchar, chars);
3248   }
3249   GCLocker::unlock_critical(thread);
3250 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3251 JNI_END
3252 
3253 
3254 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3255   JNIWrapper("jni_NewWeakGlobalRef");
3256  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3257   Handle ref_handle(thread, JNIHandles::resolve(ref));
3258   jweak ret = JNIHandles::make_weak_global(ref_handle);
3259  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3260   return ret;
3261 JNI_END
3262 
3263 // Must be JNI_ENTRY (with HandleMark)
3264 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3265   JNIWrapper("jni_DeleteWeakGlobalRef");
3266   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3267   JNIHandles::destroy_weak_global(ref);
3268   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3269 JNI_END
3270 
3271 
3272 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3273   JNIWrapper("jni_ExceptionCheck");
3274  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3275   jni_check_async_exceptions(thread);
3276   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3277  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3278   return ret;
3279 JNI_END
3280 
3281 
3282 // Initialization state for three routines below relating to
3283 // java.nio.DirectBuffers
3284 static          jint directBufferSupportInitializeStarted = 0;
3285 static volatile jint directBufferSupportInitializeEnded   = 0;
3286 static volatile jint directBufferSupportInitializeFailed  = 0;
3287 static jclass    bufferClass                 = NULL;
3288 static jclass    directBufferClass           = NULL;
3289 static jclass    directByteBufferClass       = NULL;
3290 static jmethodID directByteBufferConstructor = NULL;
3291 static jfieldID  directBufferAddressField    = NULL;
3292 static jfieldID  bufferCapacityField         = NULL;
3293 
3294 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3295   Handle loader;            // null (bootstrap) loader
3296   Handle protection_domain; // null protection domain
3297 
3298   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3299   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3300 
3301   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3302     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3303   }
3304   return result;
3305 }
3306 
3307 // These lookups are done with the NULL (bootstrap) ClassLoader to
3308 // circumvent any security checks that would be done by jni_FindClass.
3309 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3310 {
3311   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3312   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3313   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3314   return true;
3315 }
3316 JNI_END
3317 
3318 
3319 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3320   if (directBufferSupportInitializeFailed) {
3321     return false;
3322   }
3323 
3324   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3325     if (!lookupDirectBufferClasses(env)) {
3326       directBufferSupportInitializeFailed = 1;
3327       return false;
3328     }
3329 
3330     // Make global references for these
3331     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3332     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3333     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3334 
3335     // Get needed field and method IDs
3336     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3337     if (env->ExceptionCheck()) {
3338       env->ExceptionClear();
3339       directBufferSupportInitializeFailed = 1;
3340       return false;
3341     }
3342     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3343     if (env->ExceptionCheck()) {
3344       env->ExceptionClear();
3345       directBufferSupportInitializeFailed = 1;
3346       return false;
3347     }
3348     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3349     if (env->ExceptionCheck()) {
3350       env->ExceptionClear();
3351       directBufferSupportInitializeFailed = 1;
3352       return false;
3353     }
3354 
3355     if ((directByteBufferConstructor == NULL) ||
3356         (directBufferAddressField    == NULL) ||
3357         (bufferCapacityField         == NULL)) {
3358       directBufferSupportInitializeFailed = 1;
3359       return false;
3360     }
3361 
3362     directBufferSupportInitializeEnded = 1;
3363   } else {
3364     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3365       os::naked_yield();
3366     }
3367   }
3368 
3369   return !directBufferSupportInitializeFailed;
3370 }
3371 
3372 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3373 {
3374   // thread_from_jni_environment() will block if VM is gone.
3375   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3376 
3377   JNIWrapper("jni_NewDirectByteBuffer");
3378  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3379 
3380   if (!directBufferSupportInitializeEnded) {
3381     if (!initializeDirectBufferSupport(env, thread)) {
3382       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3383       return NULL;
3384     }
3385   }
3386 
3387   // Being paranoid about accidental sign extension on address
3388   jlong addr = (jlong) ((uintptr_t) address);
3389   // NOTE that package-private DirectByteBuffer constructor currently
3390   // takes int capacity
3391   jint  cap  = (jint)  capacity;
3392   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3393   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3394   return ret;
3395 }
3396 
3397 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3398                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3399 
3400 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3401 {
3402   // thread_from_jni_environment() will block if VM is gone.
3403   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3404 
3405   JNIWrapper("jni_GetDirectBufferAddress");
3406   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3407   void* ret = NULL;
3408   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3409 
3410   if (!directBufferSupportInitializeEnded) {
3411     if (!initializeDirectBufferSupport(env, thread)) {
3412       return 0;
3413     }
3414   }
3415 
3416   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3417     return 0;
3418   }
3419 
3420   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3421   return ret;
3422 }
3423 
3424 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3425                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3426 
3427 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3428 {
3429   // thread_from_jni_environment() will block if VM is gone.
3430   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3431 
3432   JNIWrapper("jni_GetDirectBufferCapacity");
3433   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3434   jlong ret = -1;
3435   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3436 
3437   if (!directBufferSupportInitializeEnded) {
3438     if (!initializeDirectBufferSupport(env, thread)) {
3439       ret = 0;
3440       return ret;
3441     }
3442   }
3443 
3444   if (buf == NULL) {
3445     return -1;
3446   }
3447 
3448   if (!env->IsInstanceOf(buf, directBufferClass)) {
3449     return -1;
3450   }
3451 
3452   // NOTE that capacity is currently an int in the implementation
3453   ret = env->GetIntField(buf, bufferCapacityField);
3454   return ret;
3455 }
3456 
3457 
3458 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3459   JNIWrapper("GetVersion");
3460   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3461   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3462   return CurrentVersion;
3463 JNI_END
3464 
3465 extern struct JavaVM_ main_vm;
3466 
3467 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3468   JNIWrapper("jni_GetJavaVM");
3469   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3470   *vm  = (JavaVM *)(&main_vm);
3471   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3472   return JNI_OK;
3473 JNI_END
3474 
3475 
3476 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3477   JNIWrapper("GetModule");
3478   return Modules::get_module(clazz, THREAD);
3479 JNI_END
3480 
3481 
3482 // Structure containing all jni functions
3483 struct JNINativeInterface_ jni_NativeInterface = {
3484     NULL,
3485     NULL,
3486     NULL,
3487 
3488     NULL,
3489 
3490     jni_GetVersion,
3491 
3492     jni_DefineClass,
3493     jni_FindClass,
3494 
3495     jni_FromReflectedMethod,
3496     jni_FromReflectedField,
3497 
3498     jni_ToReflectedMethod,
3499 
3500     jni_GetSuperclass,
3501     jni_IsAssignableFrom,
3502 
3503     jni_ToReflectedField,
3504 
3505     jni_Throw,
3506     jni_ThrowNew,
3507     jni_ExceptionOccurred,
3508     jni_ExceptionDescribe,
3509     jni_ExceptionClear,
3510     jni_FatalError,
3511 
3512     jni_PushLocalFrame,
3513     jni_PopLocalFrame,
3514 
3515     jni_NewGlobalRef,
3516     jni_DeleteGlobalRef,
3517     jni_DeleteLocalRef,
3518     jni_IsSameObject,
3519 
3520     jni_NewLocalRef,
3521     jni_EnsureLocalCapacity,
3522 
3523     jni_AllocObject,
3524     jni_NewObject,
3525     jni_NewObjectV,
3526     jni_NewObjectA,
3527 
3528     jni_GetObjectClass,
3529     jni_IsInstanceOf,
3530 
3531     jni_GetMethodID,
3532 
3533     jni_CallObjectMethod,
3534     jni_CallObjectMethodV,
3535     jni_CallObjectMethodA,
3536     jni_CallBooleanMethod,
3537     jni_CallBooleanMethodV,
3538     jni_CallBooleanMethodA,
3539     jni_CallByteMethod,
3540     jni_CallByteMethodV,
3541     jni_CallByteMethodA,
3542     jni_CallCharMethod,
3543     jni_CallCharMethodV,
3544     jni_CallCharMethodA,
3545     jni_CallShortMethod,
3546     jni_CallShortMethodV,
3547     jni_CallShortMethodA,
3548     jni_CallIntMethod,
3549     jni_CallIntMethodV,
3550     jni_CallIntMethodA,
3551     jni_CallLongMethod,
3552     jni_CallLongMethodV,
3553     jni_CallLongMethodA,
3554     jni_CallFloatMethod,
3555     jni_CallFloatMethodV,
3556     jni_CallFloatMethodA,
3557     jni_CallDoubleMethod,
3558     jni_CallDoubleMethodV,
3559     jni_CallDoubleMethodA,
3560     jni_CallVoidMethod,
3561     jni_CallVoidMethodV,
3562     jni_CallVoidMethodA,
3563 
3564     jni_CallNonvirtualObjectMethod,
3565     jni_CallNonvirtualObjectMethodV,
3566     jni_CallNonvirtualObjectMethodA,
3567     jni_CallNonvirtualBooleanMethod,
3568     jni_CallNonvirtualBooleanMethodV,
3569     jni_CallNonvirtualBooleanMethodA,
3570     jni_CallNonvirtualByteMethod,
3571     jni_CallNonvirtualByteMethodV,
3572     jni_CallNonvirtualByteMethodA,
3573     jni_CallNonvirtualCharMethod,
3574     jni_CallNonvirtualCharMethodV,
3575     jni_CallNonvirtualCharMethodA,
3576     jni_CallNonvirtualShortMethod,
3577     jni_CallNonvirtualShortMethodV,
3578     jni_CallNonvirtualShortMethodA,
3579     jni_CallNonvirtualIntMethod,
3580     jni_CallNonvirtualIntMethodV,
3581     jni_CallNonvirtualIntMethodA,
3582     jni_CallNonvirtualLongMethod,
3583     jni_CallNonvirtualLongMethodV,
3584     jni_CallNonvirtualLongMethodA,
3585     jni_CallNonvirtualFloatMethod,
3586     jni_CallNonvirtualFloatMethodV,
3587     jni_CallNonvirtualFloatMethodA,
3588     jni_CallNonvirtualDoubleMethod,
3589     jni_CallNonvirtualDoubleMethodV,
3590     jni_CallNonvirtualDoubleMethodA,
3591     jni_CallNonvirtualVoidMethod,
3592     jni_CallNonvirtualVoidMethodV,
3593     jni_CallNonvirtualVoidMethodA,
3594 
3595     jni_GetFieldID,
3596 
3597     jni_GetObjectField,
3598     jni_GetBooleanField,
3599     jni_GetByteField,
3600     jni_GetCharField,
3601     jni_GetShortField,
3602     jni_GetIntField,
3603     jni_GetLongField,
3604     jni_GetFloatField,
3605     jni_GetDoubleField,
3606 
3607     jni_SetObjectField,
3608     jni_SetBooleanField,
3609     jni_SetByteField,
3610     jni_SetCharField,
3611     jni_SetShortField,
3612     jni_SetIntField,
3613     jni_SetLongField,
3614     jni_SetFloatField,
3615     jni_SetDoubleField,
3616 
3617     jni_GetStaticMethodID,
3618 
3619     jni_CallStaticObjectMethod,
3620     jni_CallStaticObjectMethodV,
3621     jni_CallStaticObjectMethodA,
3622     jni_CallStaticBooleanMethod,
3623     jni_CallStaticBooleanMethodV,
3624     jni_CallStaticBooleanMethodA,
3625     jni_CallStaticByteMethod,
3626     jni_CallStaticByteMethodV,
3627     jni_CallStaticByteMethodA,
3628     jni_CallStaticCharMethod,
3629     jni_CallStaticCharMethodV,
3630     jni_CallStaticCharMethodA,
3631     jni_CallStaticShortMethod,
3632     jni_CallStaticShortMethodV,
3633     jni_CallStaticShortMethodA,
3634     jni_CallStaticIntMethod,
3635     jni_CallStaticIntMethodV,
3636     jni_CallStaticIntMethodA,
3637     jni_CallStaticLongMethod,
3638     jni_CallStaticLongMethodV,
3639     jni_CallStaticLongMethodA,
3640     jni_CallStaticFloatMethod,
3641     jni_CallStaticFloatMethodV,
3642     jni_CallStaticFloatMethodA,
3643     jni_CallStaticDoubleMethod,
3644     jni_CallStaticDoubleMethodV,
3645     jni_CallStaticDoubleMethodA,
3646     jni_CallStaticVoidMethod,
3647     jni_CallStaticVoidMethodV,
3648     jni_CallStaticVoidMethodA,
3649 
3650     jni_GetStaticFieldID,
3651 
3652     jni_GetStaticObjectField,
3653     jni_GetStaticBooleanField,
3654     jni_GetStaticByteField,
3655     jni_GetStaticCharField,
3656     jni_GetStaticShortField,
3657     jni_GetStaticIntField,
3658     jni_GetStaticLongField,
3659     jni_GetStaticFloatField,
3660     jni_GetStaticDoubleField,
3661 
3662     jni_SetStaticObjectField,
3663     jni_SetStaticBooleanField,
3664     jni_SetStaticByteField,
3665     jni_SetStaticCharField,
3666     jni_SetStaticShortField,
3667     jni_SetStaticIntField,
3668     jni_SetStaticLongField,
3669     jni_SetStaticFloatField,
3670     jni_SetStaticDoubleField,
3671 
3672     jni_NewString,
3673     jni_GetStringLength,
3674     jni_GetStringChars,
3675     jni_ReleaseStringChars,
3676 
3677     jni_NewStringUTF,
3678     jni_GetStringUTFLength,
3679     jni_GetStringUTFChars,
3680     jni_ReleaseStringUTFChars,
3681 
3682     jni_GetArrayLength,
3683 
3684     jni_NewObjectArray,
3685     jni_GetObjectArrayElement,
3686     jni_SetObjectArrayElement,
3687 
3688     jni_NewBooleanArray,
3689     jni_NewByteArray,
3690     jni_NewCharArray,
3691     jni_NewShortArray,
3692     jni_NewIntArray,
3693     jni_NewLongArray,
3694     jni_NewFloatArray,
3695     jni_NewDoubleArray,
3696 
3697     jni_GetBooleanArrayElements,
3698     jni_GetByteArrayElements,
3699     jni_GetCharArrayElements,
3700     jni_GetShortArrayElements,
3701     jni_GetIntArrayElements,
3702     jni_GetLongArrayElements,
3703     jni_GetFloatArrayElements,
3704     jni_GetDoubleArrayElements,
3705 
3706     jni_ReleaseBooleanArrayElements,
3707     jni_ReleaseByteArrayElements,
3708     jni_ReleaseCharArrayElements,
3709     jni_ReleaseShortArrayElements,
3710     jni_ReleaseIntArrayElements,
3711     jni_ReleaseLongArrayElements,
3712     jni_ReleaseFloatArrayElements,
3713     jni_ReleaseDoubleArrayElements,
3714 
3715     jni_GetBooleanArrayRegion,
3716     jni_GetByteArrayRegion,
3717     jni_GetCharArrayRegion,
3718     jni_GetShortArrayRegion,
3719     jni_GetIntArrayRegion,
3720     jni_GetLongArrayRegion,
3721     jni_GetFloatArrayRegion,
3722     jni_GetDoubleArrayRegion,
3723 
3724     jni_SetBooleanArrayRegion,
3725     jni_SetByteArrayRegion,
3726     jni_SetCharArrayRegion,
3727     jni_SetShortArrayRegion,
3728     jni_SetIntArrayRegion,
3729     jni_SetLongArrayRegion,
3730     jni_SetFloatArrayRegion,
3731     jni_SetDoubleArrayRegion,
3732 
3733     jni_RegisterNatives,
3734     jni_UnregisterNatives,
3735 
3736     jni_MonitorEnter,
3737     jni_MonitorExit,
3738 
3739     jni_GetJavaVM,
3740 
3741     jni_GetStringRegion,
3742     jni_GetStringUTFRegion,
3743 
3744     jni_GetPrimitiveArrayCritical,
3745     jni_ReleasePrimitiveArrayCritical,
3746 
3747     jni_GetStringCritical,
3748     jni_ReleaseStringCritical,
3749 
3750     jni_NewWeakGlobalRef,
3751     jni_DeleteWeakGlobalRef,
3752 
3753     jni_ExceptionCheck,
3754 
3755     jni_NewDirectByteBuffer,
3756     jni_GetDirectBufferAddress,
3757     jni_GetDirectBufferCapacity,
3758 
3759     // New 1_6 features
3760 
3761     jni_GetObjectRefType,
3762 
3763     // Module features
3764 
3765     jni_GetModule
3766 };
3767 
3768 
3769 // For jvmti use to modify jni function table.
3770 // Java threads in native contiues to run until it is transitioned
3771 // to VM at safepoint. Before the transition or before it is blocked
3772 // for safepoint it may access jni function table. VM could crash if
3773 // any java thread access the jni function table in the middle of memcpy.
3774 // To avoid this each function pointers are copied automically.
3775 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3776   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3777   intptr_t *a = (intptr_t *) jni_functions();
3778   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3779   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3780     Atomic::store_ptr(*b++, a++);
3781   }
3782 }
3783 
3784 void quicken_jni_functions() {
3785   // Replace Get<Primitive>Field with fast versions
3786   if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3787       && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3788 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3789       // windows x86 currently needs SEH wrapper and the gain of the fast
3790       // versions currently isn't certain for server vm on uniprocessor.
3791       && os::is_MP()
3792 #endif
3793   ) {
3794     address func;
3795     func = JNI_FastGetField::generate_fast_get_boolean_field();
3796     if (func != (address)-1) {
3797       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3798     }
3799     func = JNI_FastGetField::generate_fast_get_byte_field();
3800     if (func != (address)-1) {
3801       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3802     }
3803     func = JNI_FastGetField::generate_fast_get_char_field();
3804     if (func != (address)-1) {
3805       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3806     }
3807     func = JNI_FastGetField::generate_fast_get_short_field();
3808     if (func != (address)-1) {
3809       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3810     }
3811     func = JNI_FastGetField::generate_fast_get_int_field();
3812     if (func != (address)-1) {
3813       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3814     }
3815     func = JNI_FastGetField::generate_fast_get_long_field();
3816     if (func != (address)-1) {
3817       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3818     }
3819     func = JNI_FastGetField::generate_fast_get_float_field();
3820     if (func != (address)-1) {
3821       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3822     }
3823     func = JNI_FastGetField::generate_fast_get_double_field();
3824     if (func != (address)-1) {
3825       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3826     }
3827   }
3828 }
3829 
3830 // Returns the function structure
3831 struct JNINativeInterface_* jni_functions() {
3832 #if INCLUDE_JNI_CHECK
3833   if (CheckJNICalls) return jni_functions_check();
3834 #endif // INCLUDE_JNI_CHECK
3835   return &jni_NativeInterface;
3836 }
3837 
3838 // Returns the function structure
3839 struct JNINativeInterface_* jni_functions_nocheck() {
3840   return &jni_NativeInterface;
3841 }
3842 
3843 
3844 // Invocation API
3845 
3846 
3847 // Forward declaration
3848 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3849 
3850 // Global invocation API vars
3851 volatile jint vm_created = 0;
3852 // Indicate whether it is safe to recreate VM
3853 volatile jint safe_to_recreate_vm = 1;
3854 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3855 
3856 
3857 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3858 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3859 
3860 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3861                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3862 
3863 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3864   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3865   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3866   jint ret = JNI_ERR;
3867   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3868 
3869   if (Threads::is_supported_jni_version(args->version)) {
3870     ret = JNI_OK;
3871   }
3872   // 1.1 style no longer supported in hotspot.
3873   // According the JNI spec, we should update args->version on return.
3874   // We also use the structure to communicate with launcher about default
3875   // stack size.
3876   if (args->version == JNI_VERSION_1_1) {
3877     args->version = JNI_VERSION_1_2;
3878     // javaStackSize is int in arguments structure
3879     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3880     args->javaStackSize = (jint)(ThreadStackSize * K);
3881   }
3882   return ret;
3883 }
3884 
3885 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3886                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3887 
3888 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3889   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3890 
3891   jint result = JNI_ERR;
3892   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3893 
3894   // We're about to use Atomic::xchg for synchronization.  Some Zero
3895   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3896   // but __sync_lock_test_and_set is not guaranteed to do what we want
3897   // on all architectures.  So we check it works before relying on it.
3898 #if defined(ZERO) && defined(ASSERT)
3899   {
3900     jint a = 0xcafebabe;
3901     jint b = Atomic::xchg(0xdeadbeef, &a);
3902     void *c = &a;
3903     void *d = Atomic::xchg_ptr(&b, &c);
3904     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3905     assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3906   }
3907 #endif // ZERO && ASSERT
3908 
3909   // At the moment it's only possible to have one Java VM,
3910   // since some of the runtime state is in global variables.
3911 
3912   // We cannot use our mutex locks here, since they only work on
3913   // Threads. We do an atomic compare and exchange to ensure only
3914   // one thread can call this method at a time
3915 
3916   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3917   // the add/dec implementations are dependent on whether we are running
3918   // on a multiprocessor, and at this stage of initialization the os::is_MP
3919   // function used to determine this will always return false. Atomic::xchg
3920   // does not have this problem.
3921   if (Atomic::xchg(1, &vm_created) == 1) {
3922     return JNI_EEXIST;   // already created, or create attempt in progress
3923   }
3924   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3925     return JNI_ERR;  // someone tried and failed and retry not allowed.
3926   }
3927 
3928   assert(vm_created == 1, "vm_created is true during the creation");
3929 
3930   /**
3931    * Certain errors during initialization are recoverable and do not
3932    * prevent this method from being called again at a later time
3933    * (perhaps with different arguments).  However, at a certain
3934    * point during initialization if an error occurs we cannot allow
3935    * this function to be called again (or it will crash).  In those
3936    * situations, the 'canTryAgain' flag is set to false, which atomically
3937    * sets safe_to_recreate_vm to 1, such that any new call to
3938    * JNI_CreateJavaVM will immediately fail using the above logic.
3939    */
3940   bool can_try_again = true;
3941 
3942   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3943   if (result == JNI_OK) {
3944     JavaThread *thread = JavaThread::current();
3945     assert(!thread->has_pending_exception(), "should have returned not OK");
3946     /* thread is thread_in_vm here */
3947     *vm = (JavaVM *)(&main_vm);
3948     *(JNIEnv**)penv = thread->jni_environment();
3949 
3950 #if INCLUDE_JVMCI
3951     if (EnableJVMCI) {
3952       if (UseJVMCICompiler) {
3953         // JVMCI is initialized on a CompilerThread
3954         if (BootstrapJVMCI) {
3955           JavaThread* THREAD = thread;
3956           JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3957           compiler->bootstrap(THREAD);
3958           if (HAS_PENDING_EXCEPTION) {
3959             HandleMark hm;
3960             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3961           }
3962         }
3963       }
3964     }
3965 #endif
3966 
3967     // Tracks the time application was running before GC
3968     RuntimeService::record_application_start();
3969 
3970     // Notify JVMTI
3971     if (JvmtiExport::should_post_thread_life()) {
3972        JvmtiExport::post_thread_start(thread);
3973     }
3974 
3975     EventThreadStart event;
3976     if (event.should_commit()) {
3977       event.set_thread(THREAD_TRACE_ID(thread));
3978       event.commit();
3979     }
3980 
3981 #ifndef PRODUCT
3982     // Check if we should compile all classes on bootclasspath
3983     if (CompileTheWorld) ClassLoader::compile_the_world();
3984     if (ReplayCompiles) ciReplay::replay(thread);
3985 
3986     // Some platforms (like Win*) need a wrapper around these test
3987     // functions in order to properly handle error conditions.
3988     VMError::test_error_handler();
3989     if (ExecuteInternalVMTests) {
3990       InternalVMTests::run();
3991     }
3992 #endif
3993 
3994     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3995     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3996   } else {
3997     // If create_vm exits because of a pending exception, exit with that
3998     // exception.  In the future when we figure out how to reclaim memory,
3999     // we may be able to exit with JNI_ERR and allow the calling application
4000     // to continue.
4001     if (Universe::is_fully_initialized()) {
4002       // otherwise no pending exception possible - VM will already have aborted
4003       JavaThread* THREAD = JavaThread::current();
4004       if (HAS_PENDING_EXCEPTION) {
4005         HandleMark hm;
4006         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4007       }
4008     }
4009 
4010     if (can_try_again) {
4011       // reset safe_to_recreate_vm to 1 so that retrial would be possible
4012       safe_to_recreate_vm = 1;
4013     }
4014 
4015     // Creation failed. We must reset vm_created
4016     *vm = 0;
4017     *(JNIEnv**)penv = 0;
4018     // reset vm_created last to avoid race condition. Use OrderAccess to
4019     // control both compiler and architectural-based reordering.
4020     OrderAccess::release_store(&vm_created, 0);
4021   }
4022 
4023   // Flush stdout and stderr before exit.
4024   fflush(stdout);
4025   fflush(stderr);
4026 
4027   return result;
4028 
4029 }
4030 
4031 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4032   jint result = JNI_ERR;
4033   // On Windows, let CreateJavaVM run with SEH protection
4034 #ifdef _WIN32
4035   __try {
4036 #endif
4037     result = JNI_CreateJavaVM_inner(vm, penv, args);
4038 #ifdef _WIN32
4039   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4040     // Nothing to do.
4041   }
4042 #endif
4043   return result;
4044 }
4045 
4046 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4047   // See bug 4367188, the wrapper can sometimes cause VM crashes
4048   // JNIWrapper("GetCreatedJavaVMs");
4049 
4050   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4051 
4052   if (vm_created) {
4053     if (numVMs != NULL) *numVMs = 1;
4054     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4055   } else {
4056     if (numVMs != NULL) *numVMs = 0;
4057   }
4058   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4059   return JNI_OK;
4060 }
4061 
4062 extern "C" {
4063 
4064 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4065                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4066 
4067 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4068   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4069   jint res = JNI_ERR;
4070   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4071 
4072   if (!vm_created) {
4073     res = JNI_ERR;
4074     return res;
4075   }
4076 
4077   JNIWrapper("DestroyJavaVM");
4078   JNIEnv *env;
4079   JavaVMAttachArgs destroyargs;
4080   destroyargs.version = CurrentVersion;
4081   destroyargs.name = (char *)"DestroyJavaVM";
4082   destroyargs.group = NULL;
4083   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4084   if (res != JNI_OK) {
4085     return res;
4086   }
4087 
4088   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4089   JavaThread* thread = JavaThread::current();
4090   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4091   if (Threads::destroy_vm()) {
4092     // Should not change thread state, VM is gone
4093     vm_created = false;
4094     res = JNI_OK;
4095     return res;
4096   } else {
4097     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4098     res = JNI_ERR;
4099     return res;
4100   }
4101 }
4102 
4103 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4104   jint result = JNI_ERR;
4105   // On Windows, we need SEH protection
4106 #ifdef _WIN32
4107   __try {
4108 #endif
4109     result = jni_DestroyJavaVM_inner(vm);
4110 #ifdef _WIN32
4111   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4112     // Nothing to do.
4113   }
4114 #endif
4115   return result;
4116 }
4117 
4118 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4119   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4120 
4121   // Check below commented out from JDK1.2fcs as well
4122   /*
4123   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4124     return JNI_EVERSION;
4125   }
4126   */
4127 
4128   Thread* t = Thread::current_or_null();
4129   if (t != NULL) {
4130     // If the thread has been attached this operation is a no-op
4131     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4132     return JNI_OK;
4133   }
4134 
4135   // Create a thread and mark it as attaching so it will be skipped by the
4136   // ThreadsListEnumerator - see CR 6404306
4137   JavaThread* thread = new JavaThread(true);
4138 
4139   // Set correct safepoint info. The thread is going to call into Java when
4140   // initializing the Java level thread object. Hence, the correct state must
4141   // be set in order for the Safepoint code to deal with it correctly.
4142   thread->set_thread_state(_thread_in_vm);
4143   thread->record_stack_base_and_size();
4144   thread->initialize_thread_current();
4145 
4146   if (!os::create_attached_thread(thread)) {
4147     delete thread;
4148     return JNI_ERR;
4149   }
4150   // Enable stack overflow checks
4151   thread->create_stack_guard_pages();
4152 
4153   thread->initialize_tlab();
4154 
4155   thread->cache_global_variables();
4156 
4157   // Crucial that we do not have a safepoint check for this thread, since it has
4158   // not been added to the Thread list yet.
4159   { Threads_lock->lock_without_safepoint_check();
4160     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4161     // avoid this thread trying to do a GC before it is added to the thread-list
4162     thread->set_active_handles(JNIHandleBlock::allocate_block());
4163     Threads::add(thread, daemon);
4164     Threads_lock->unlock();
4165   }
4166   // Create thread group and name info from attach arguments
4167   oop group = NULL;
4168   char* thread_name = NULL;
4169   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4170     group = JNIHandles::resolve(args->group);
4171     thread_name = args->name; // may be NULL
4172   }
4173   if (group == NULL) group = Universe::main_thread_group();
4174 
4175   // Create Java level thread object and attach it to this thread
4176   bool attach_failed = false;
4177   {
4178     EXCEPTION_MARK;
4179     HandleMark hm(THREAD);
4180     Handle thread_group(THREAD, group);
4181     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4182     if (HAS_PENDING_EXCEPTION) {
4183       CLEAR_PENDING_EXCEPTION;
4184       // cleanup outside the handle mark.
4185       attach_failed = true;
4186     }
4187   }
4188 
4189   if (attach_failed) {
4190     // Added missing cleanup
4191     thread->cleanup_failed_attach_current_thread();
4192     return JNI_ERR;
4193   }
4194 
4195   // mark the thread as no longer attaching
4196   // this uses a fence to push the change through so we don't have
4197   // to regrab the threads_lock
4198   thread->set_done_attaching_via_jni();
4199 
4200   // Set java thread status.
4201   java_lang_Thread::set_thread_status(thread->threadObj(),
4202               java_lang_Thread::RUNNABLE);
4203 
4204   // Notify the debugger
4205   if (JvmtiExport::should_post_thread_life()) {
4206     JvmtiExport::post_thread_start(thread);
4207   }
4208 
4209   EventThreadStart event;
4210   if (event.should_commit()) {
4211     event.set_thread(THREAD_TRACE_ID(thread));
4212     event.commit();
4213   }
4214 
4215   *(JNIEnv**)penv = thread->jni_environment();
4216 
4217   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4218   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4219   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4220   // needed.
4221 
4222   ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4223 
4224   // Perform any platform dependent FPU setup
4225   os::setup_fpu();
4226 
4227   return JNI_OK;
4228 }
4229 
4230 
4231 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4232   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4233   if (!vm_created) {
4234   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4235     return JNI_ERR;
4236   }
4237 
4238   JNIWrapper("AttachCurrentThread");
4239   jint ret = attach_current_thread(vm, penv, _args, false);
4240   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4241   return ret;
4242 }
4243 
4244 
4245 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4246   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4247   VM_Exit::block_if_vm_exited();
4248 
4249   JNIWrapper("DetachCurrentThread");
4250 
4251   // If the thread has already been detached the operation is a no-op
4252   if (Thread::current_or_null() == NULL) {
4253   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4254     return JNI_OK;
4255   }
4256 
4257   JavaThread* thread = JavaThread::current();
4258   if (thread->has_last_Java_frame()) {
4259   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4260     // Can't detach a thread that's running java, that can't work.
4261     return JNI_ERR;
4262   }
4263 
4264   // Safepoint support. Have to do call-back to safepoint code, if in the
4265   // middel of a safepoint operation
4266   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4267 
4268   // XXX: Note that JavaThread::exit() call below removes the guards on the
4269   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4270   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4271   // of the guards is visible in jni_AttachCurrentThread above,
4272   // the removal of the guards is buried below in JavaThread::exit()
4273   // here. The abstraction should be more symmetrically either exposed
4274   // or hidden (e.g. it could probably be hidden in the same
4275   // (platform-dependent) methods where we do alternate stack
4276   // maintenance work?)
4277   thread->exit(false, JavaThread::jni_detach);
4278   delete thread;
4279 
4280   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4281   return JNI_OK;
4282 }
4283 
4284 DT_RETURN_MARK_DECL(GetEnv, jint
4285                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4286 
4287 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4288   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4289   jint ret = JNI_ERR;
4290   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4291 
4292   if (!vm_created) {
4293     *penv = NULL;
4294     ret = JNI_EDETACHED;
4295     return ret;
4296   }
4297 
4298   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4299     return ret;
4300   }
4301 
4302 #ifndef JVMPI_VERSION_1
4303 // need these in order to be polite about older agents
4304 #define JVMPI_VERSION_1   ((jint)0x10000001)
4305 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4306 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4307 #endif // !JVMPI_VERSION_1
4308 
4309   Thread* thread = Thread::current_or_null();
4310   if (thread != NULL && thread->is_Java_thread()) {
4311     if (Threads::is_supported_jni_version_including_1_1(version)) {
4312       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4313       ret = JNI_OK;
4314       return ret;
4315 
4316     } else if (version == JVMPI_VERSION_1 ||
4317                version == JVMPI_VERSION_1_1 ||
4318                version == JVMPI_VERSION_1_2) {
4319       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4320       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4321       ret = JNI_EVERSION;
4322       return ret;
4323     } else if (JvmtiExport::is_jvmdi_version(version)) {
4324       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4325       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4326       ret = JNI_EVERSION;
4327       return ret;
4328     } else {
4329       *penv = NULL;
4330       ret = JNI_EVERSION;
4331       return ret;
4332     }
4333   } else {
4334     *penv = NULL;
4335     ret = JNI_EDETACHED;
4336     return ret;
4337   }
4338 }
4339 
4340 
4341 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4342   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4343   if (!vm_created) {
4344   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4345     return JNI_ERR;
4346   }
4347 
4348   JNIWrapper("AttachCurrentThreadAsDaemon");
4349   jint ret = attach_current_thread(vm, penv, _args, true);
4350   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4351   return ret;
4352 }
4353 
4354 
4355 } // End extern "C"
4356 
4357 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4358     NULL,
4359     NULL,
4360     NULL,
4361 
4362     jni_DestroyJavaVM,
4363     jni_AttachCurrentThread,
4364     jni_DetachCurrentThread,
4365     jni_GetEnv,
4366     jni_AttachCurrentThreadAsDaemon
4367 };