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/fprofiler.hpp"
  66 #include "runtime/handles.inline.hpp"
  67 #include "runtime/interfaceSupport.hpp"
  68 #include "runtime/java.hpp"
  69 #include "runtime/javaCalls.hpp"
  70 #include "runtime/jfieldIDWorkaround.hpp"
  71 #include "runtime/orderAccess.inline.hpp"
  72 #include "runtime/reflection.hpp"
  73 #include "runtime/sharedRuntime.hpp"
  74 #include "runtime/signature.hpp"
  75 #include "runtime/thread.inline.hpp"
  76 #include "runtime/vm_operations.hpp"
  77 #include "services/memTracker.hpp"
  78 #include "services/runtimeService.hpp"
  79 #include "trace/traceMacros.hpp"
  80 #include "trace/tracing.hpp"
  81 #include "utilities/defaultStream.hpp"
  82 #include "utilities/dtrace.hpp"
  83 #include "utilities/events.hpp"
  84 #include "utilities/histogram.hpp"
  85 #include "utilities/internalVMTests.hpp"
  86 #include "utilities/macros.hpp"
  87 #include "utilities/vmError.hpp"
  88 #if INCLUDE_ALL_GCS
  89 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
  90 #endif // INCLUDE_ALL_GCS
  91 #if INCLUDE_JVMCI
  92 #include "jvmci/jvmciCompiler.hpp"
  93 #include "jvmci/jvmciRuntime.hpp"
  94 #endif
  95 
  96 static jint CurrentVersion = JNI_VERSION_9;
  97 
  98 #ifdef _WIN32
  99 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
 100 #endif
 101 
 102 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
 103 // '-return' probe regardless of the return path is taken out of the function.
 104 // Methods that have multiple return paths use this to avoid having to
 105 // instrument each return path.  Methods that use CHECK or THROW must use this
 106 // since those macros can cause an immedate uninstrumented return.
 107 //
 108 // In order to get the return value, a reference to the variable containing
 109 // the return value must be passed to the contructor of the object, and
 110 // the return value must be set before return (since the mark object has
 111 // a reference to it).
 112 //
 113 // Example:
 114 // DT_RETURN_MARK_DECL(SomeFunc, int);
 115 // JNI_ENTRY(int, SomeFunc, ...)
 116 //   int return_value = 0;
 117 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 118 //   foo(CHECK_0)
 119 //   return_value = 5;
 120 //   return return_value;
 121 // JNI_END
 122 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 123   DTRACE_ONLY(                                                             \
 124     class DTraceReturnProbeMark_##name {                                   \
 125      public:                                                               \
 126       const type& _ret_ref;                                                \
 127       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 128       ~DTraceReturnProbeMark_##name() {                                    \
 129         probe;                                                             \
 130       }                                                                    \
 131     }                                                                      \
 132   )
 133 // Void functions are simpler since there's no return value
 134 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 135   DTRACE_ONLY(                                                             \
 136     class DTraceReturnProbeMark_##name {                                   \
 137      public:                                                               \
 138       ~DTraceReturnProbeMark_##name() {                                    \
 139         probe;                                                             \
 140       }                                                                    \
 141     }                                                                      \
 142   )
 143 
 144 // Place these macros in the function to mark the return.  Non-void
 145 // functions need the type and address of the return value.
 146 #define DT_RETURN_MARK(name, type, ref) \
 147   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 148 #define DT_VOID_RETURN_MARK(name) \
 149   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 150 
 151 
 152 // Use these to select distinct code for floating-point vs. non-floating point
 153 // situations.  Used from within common macros where we need slightly
 154 // different behavior for Float/Double
 155 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 156 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 157 #define FP_SELECT_Char(intcode, fpcode)    intcode
 158 #define FP_SELECT_Short(intcode, fpcode)   intcode
 159 #define FP_SELECT_Object(intcode, fpcode)  intcode
 160 #define FP_SELECT_Int(intcode, fpcode)     intcode
 161 #define FP_SELECT_Long(intcode, fpcode)    intcode
 162 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 163 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 164 #define FP_SELECT(TypeName, intcode, fpcode) \
 165   FP_SELECT_##TypeName(intcode, fpcode)
 166 
 167 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 168 // (dtrace doesn't do FP yet)
 169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 170   FP_SELECT(TypeName, \
 171     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 173   FP_SELECT(TypeName, \
 174     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 175 
 176 
 177 // out-of-line helpers for class jfieldIDWorkaround:
 178 
 179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 180   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 181     uintptr_t as_uint = (uintptr_t) id;
 182     intptr_t offset = raw_instance_offset(id);
 183     if (is_checked_jfieldID(id)) {
 184       if (!klass_hash_ok(k, id)) {
 185         return false;
 186       }
 187     }
 188     return InstanceKlass::cast(k)->contains_field_offset(offset);
 189   } else {
 190     JNIid* result = (JNIid*) id;
 191 #ifdef ASSERT
 192     return result != NULL && result->is_static_field_id();
 193 #else
 194     return result != NULL;
 195 #endif
 196   }
 197 }
 198 
 199 
 200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
 201   if (offset <= small_offset_mask) {
 202     Klass* field_klass = k;
 203     Klass* super_klass = field_klass->super();
 204     // With compressed oops the most super class with nonstatic fields would
 205     // be the owner of fields embedded in the header.
 206     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 207            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 208       field_klass = super_klass;   // super contains the field also
 209       super_klass = field_klass->super();
 210     }
 211     debug_only(NoSafepointVerifier nosafepoint;)
 212     uintptr_t klass_hash = field_klass->identity_hash();
 213     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 214   } else {
 215 #if 0
 216     #ifndef PRODUCT
 217     {
 218       ResourceMark rm;
 219       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 220     }
 221     #endif
 222 #endif
 223     return 0;
 224   }
 225 }
 226 
 227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 228   uintptr_t as_uint = (uintptr_t) id;
 229   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 230   do {
 231     debug_only(NoSafepointVerifier nosafepoint;)
 232     // Could use a non-blocking query for identity_hash here...
 233     if ((k->identity_hash() & klass_mask) == klass_hash)
 234       return true;
 235     k = k->super();
 236   } while (k != NULL);
 237   return false;
 238 }
 239 
 240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 241   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 242   uintptr_t as_uint = (uintptr_t) id;
 243   intptr_t offset = raw_instance_offset(id);
 244   if (VerifyJNIFields) {
 245     if (is_checked_jfieldID(id)) {
 246       guarantee(klass_hash_ok(k, id),
 247     "Bug in native code: jfieldID class must match object");
 248     } else {
 249 #if 0
 250       #ifndef PRODUCT
 251       if (Verbose) {
 252   ResourceMark rm;
 253   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 254       }
 255       #endif
 256 #endif
 257     }
 258   }
 259   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 260       "Bug in native code: jfieldID offset must address interior of object");
 261 }
 262 
 263 // Wrapper to trace JNI functions
 264 
 265 #ifdef ASSERT
 266   Histogram* JNIHistogram;
 267   static volatile jint JNIHistogram_lock = 0;
 268 
 269   class JNIHistogramElement : public HistogramElement {
 270     public:
 271      JNIHistogramElement(const char* name);
 272   };
 273 
 274   JNIHistogramElement::JNIHistogramElement(const char* elementName) {
 275     _name = elementName;
 276     uintx count = 0;
 277 
 278     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
 279       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
 280         count +=1;
 281         if ( (WarnOnStalledSpinLock > 0)
 282           && (count % WarnOnStalledSpinLock == 0)) {
 283           warning("JNIHistogram_lock seems to be stalled");
 284         }
 285       }
 286      }
 287 
 288 
 289     if(JNIHistogram == NULL)
 290       JNIHistogram = new Histogram("JNI Call Counts",100);
 291 
 292     JNIHistogram->add_element(this);
 293     Atomic::dec(&JNIHistogram_lock);
 294   }
 295 
 296   #define JNICountWrapper(arg)                                     \
 297      static JNIHistogramElement* e = new JNIHistogramElement(arg); \
 298       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
 299      if (e != NULL) e->increment_count()
 300   #define JNIWrapper(arg) JNICountWrapper(arg);
 301 #else
 302   #define JNIWrapper(arg)
 303 #endif
 304 
 305 
 306 // Implementation of JNI entries
 307 
 308 DT_RETURN_MARK_DECL(DefineClass, jclass
 309                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 310 
 311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 312                                   const jbyte *buf, jsize bufLen))
 313   JNIWrapper("DefineClass");
 314 
 315   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 316     env, (char*) name, loaderRef, (char*) buf, bufLen);
 317 
 318   jclass cls = NULL;
 319   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 320 
 321   TempNewSymbol class_name = NULL;
 322   // Since exceptions can be thrown, class initialization can take place
 323   // if name is NULL no check for class name in .class stream has to be made.
 324   if (name != NULL) {
 325     const int str_len = (int)strlen(name);
 326     if (str_len > Symbol::max_length()) {
 327       // It's impossible to create this class;  the name cannot fit
 328       // into the constant pool.
 329       Exceptions::fthrow(THREAD_AND_LOCATION,
 330                          vmSymbols::java_lang_NoClassDefFoundError(),
 331                          "Class name exceeds maximum length of %d: %s",
 332                          Symbol::max_length(),
 333                          name);
 334       return 0;
 335     }
 336     class_name = SymbolTable::new_symbol(name, CHECK_NULL);
 337   }
 338   ResourceMark rm(THREAD);
 339   ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
 340   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 341 
 342   if (UsePerfData && !class_loader.is_null()) {
 343     // check whether the current caller thread holds the lock or not.
 344     // If not, increment the corresponding counter
 345     if (ObjectSynchronizer::
 346         query_lock_ownership((JavaThread*)THREAD, class_loader) !=
 347         ObjectSynchronizer::owner_self) {
 348       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
 349     }
 350   }
 351   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 352                                                    class_loader,
 353                                                    Handle(),
 354                                                    &st,
 355                                                    CHECK_NULL);
 356 
 357   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 358     trace_class_resolution(k);
 359   }
 360 
 361   cls = (jclass)JNIHandles::make_local(
 362     env, k->java_mirror());
 363   return cls;
 364 JNI_END
 365 
 366 
 367 
 368 static bool first_time_FindClass = true;
 369 
 370 DT_RETURN_MARK_DECL(FindClass, jclass
 371                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 372 
 373 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 374   JNIWrapper("FindClass");
 375 
 376   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 377 
 378   jclass result = NULL;
 379   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 380 
 381   // Remember if we are the first invocation of jni_FindClass
 382   bool first_time = first_time_FindClass;
 383   first_time_FindClass = false;
 384 
 385   // Sanity check the name:  it cannot be null or larger than the maximum size
 386   // name we can fit in the constant pool.
 387   if (name == NULL) {
 388     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
 389   }
 390   if ((int)strlen(name) > Symbol::max_length()) {
 391     Exceptions::fthrow(THREAD_AND_LOCATION,
 392                        vmSymbols::java_lang_NoClassDefFoundError(),
 393                        "Class name exceeds maximum length of %d: %s",
 394                        Symbol::max_length(),
 395                        name);
 396     return 0;
 397   }
 398 
 399   //%note jni_3
 400   Handle loader;
 401   Handle protection_domain;
 402   // Find calling class
 403   Klass* k = thread->security_get_caller_class(0);
 404   if (k != NULL) {
 405     loader = Handle(THREAD, k->class_loader());
 406     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 407     // in the correct class context.
 408     if (loader.is_null() &&
 409         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 410       JavaValue result(T_OBJECT);
 411       JavaCalls::call_static(&result, k,
 412                              vmSymbols::getFromClass_name(),
 413                              vmSymbols::void_class_signature(),
 414                              thread);
 415       if (HAS_PENDING_EXCEPTION) {
 416         Handle ex(thread, thread->pending_exception());
 417         CLEAR_PENDING_EXCEPTION;
 418         THROW_HANDLE_0(ex);
 419       }
 420       oop mirror = (oop) result.get_jobject();
 421       loader = Handle(THREAD,
 422         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
 423       protection_domain = Handle(THREAD,
 424         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
 425     }
 426   } else {
 427     // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
 428     loader = Handle(THREAD, SystemDictionary::java_system_loader());
 429   }
 430 
 431   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
 432   result = find_class_from_class_loader(env, sym, true, loader,
 433                                         protection_domain, true, thread);
 434 
 435   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 436     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 437   }
 438 
 439   // If we were the first invocation of jni_FindClass, we enable compilation again
 440   // rather than just allowing invocation counter to overflow and decay.
 441   // Controlled by flag DelayCompilationDuringStartup.
 442   if (first_time && !CompileTheWorld)
 443     CompilationPolicy::completed_vm_startup();
 444 
 445   return result;
 446 JNI_END
 447 
 448 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 449                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 450 
 451 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 452   JNIWrapper("FromReflectedMethod");
 453 
 454   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 455 
 456   jmethodID ret = NULL;
 457   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 458 
 459   // method is a handle to a java.lang.reflect.Method object
 460   oop reflected  = JNIHandles::resolve_non_null(method);
 461   oop mirror     = NULL;
 462   int slot       = 0;
 463 
 464   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 465     mirror = java_lang_reflect_Constructor::clazz(reflected);
 466     slot   = java_lang_reflect_Constructor::slot(reflected);
 467   } else {
 468     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 469     mirror = java_lang_reflect_Method::clazz(reflected);
 470     slot   = java_lang_reflect_Method::slot(reflected);
 471   }
 472   Klass* k1 = java_lang_Class::as_Klass(mirror);
 473 
 474   // Make sure class is initialized before handing id's out to methods
 475   k1->initialize(CHECK_NULL);
 476   Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
 477   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 478   return ret;
 479 JNI_END
 480 
 481 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 482                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 483 
 484 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 485   JNIWrapper("FromReflectedField");
 486 
 487   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 488 
 489   jfieldID ret = NULL;
 490   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 491 
 492   // field is a handle to a java.lang.reflect.Field object
 493   oop reflected   = JNIHandles::resolve_non_null(field);
 494   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 495   Klass* k1       = java_lang_Class::as_Klass(mirror);
 496   int slot        = java_lang_reflect_Field::slot(reflected);
 497   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 498 
 499   // Make sure class is initialized before handing id's out to fields
 500   k1->initialize(CHECK_NULL);
 501 
 502   // First check if this is a static field
 503   if (modifiers & JVM_ACC_STATIC) {
 504     intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 505     JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
 506     assert(id != NULL, "corrupt Field object");
 507     debug_only(id->set_is_static_field_id();)
 508     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 509     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 510     return ret;
 511   }
 512 
 513   // The slot is the index of the field description in the field-array
 514   // The jfieldID is the offset of the field within the object
 515   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 516   intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
 517   assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
 518   ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
 519   return ret;
 520 JNI_END
 521 
 522 
 523 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 524                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 525 
 526 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 527   JNIWrapper("ToReflectedMethod");
 528 
 529   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 530 
 531   jobject ret = NULL;
 532   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 533 
 534   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 535   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 536   oop reflection_method;
 537   if (m->is_initializer()) {
 538     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 539   } else {
 540     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 541   }
 542   ret = JNIHandles::make_local(env, reflection_method);
 543   return ret;
 544 JNI_END
 545 
 546 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 547                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 548 
 549 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 550   JNIWrapper("GetSuperclass");
 551 
 552   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 553 
 554   jclass obj = NULL;
 555   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 556 
 557   oop mirror = JNIHandles::resolve_non_null(sub);
 558   // primitive classes return NULL
 559   if (java_lang_Class::is_primitive(mirror)) return NULL;
 560 
 561   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 562   // arrays return Object
 563   // interfaces return NULL
 564   // proper classes return Klass::super()
 565   Klass* k = java_lang_Class::as_Klass(mirror);
 566   if (k->is_interface()) return NULL;
 567 
 568   // return mirror for superclass
 569   Klass* super = k->java_super();
 570   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 571   debug_only(Klass* super2 = ( k->is_array_klass()
 572                                  ? SystemDictionary::Object_klass()
 573                                  : k->super() ) );
 574   assert(super == super2,
 575          "java_super computation depends on interface, array, other super");
 576   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 577   return obj;
 578 JNI_END
 579 
 580 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 581   JNIWrapper("IsSubclassOf");
 582 
 583   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 584 
 585   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 586   oop super_mirror = JNIHandles::resolve_non_null(super);
 587   if (java_lang_Class::is_primitive(sub_mirror) ||
 588       java_lang_Class::is_primitive(super_mirror)) {
 589     jboolean ret = (sub_mirror == super_mirror);
 590 
 591     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 592     return ret;
 593   }
 594   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 595   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 596   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 597   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 598                    JNI_TRUE : JNI_FALSE;
 599 
 600   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 601   return ret;
 602 JNI_END
 603 
 604 
 605 DT_RETURN_MARK_DECL(Throw, jint
 606                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 607 
 608 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 609   JNIWrapper("Throw");
 610 
 611   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 612 
 613   jint ret = JNI_OK;
 614   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 615 
 616   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 617   ShouldNotReachHere();
 618   return 0;  // Mute compiler.
 619 JNI_END
 620 
 621 
 622 DT_RETURN_MARK_DECL(ThrowNew, jint
 623                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 624 
 625 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 626   JNIWrapper("ThrowNew");
 627 
 628   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 629 
 630   jint ret = JNI_OK;
 631   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 632 
 633   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 634   Symbol*  name = k->name();
 635   Handle class_loader (THREAD,  k->class_loader());
 636   Handle protection_domain (THREAD, k->protection_domain());
 637   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 638   ShouldNotReachHere();
 639   return 0;  // Mute compiler.
 640 JNI_END
 641 
 642 
 643 // JNI functions only transform a pending async exception to a synchronous
 644 // exception in ExceptionOccurred and ExceptionCheck calls, since
 645 // delivering an async exception in other places won't change the native
 646 // code's control flow and would be harmful when native code further calls
 647 // JNI functions with a pending exception. Async exception is also checked
 648 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 649 // false but deliver the async exception at the very end during
 650 // state transition.
 651 
 652 static void jni_check_async_exceptions(JavaThread *thread) {
 653   assert(thread == Thread::current(), "must be itself");
 654   thread->check_and_handle_async_exceptions();
 655 }
 656 
 657 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 658   JNIWrapper("ExceptionOccurred");
 659 
 660   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 661 
 662   jni_check_async_exceptions(thread);
 663   oop exception = thread->pending_exception();
 664   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 665 
 666   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 667   return ret;
 668 JNI_END
 669 
 670 
 671 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 672   JNIWrapper("ExceptionDescribe");
 673 
 674   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 675 
 676   if (thread->has_pending_exception()) {
 677     Handle ex(thread, thread->pending_exception());
 678     thread->clear_pending_exception();
 679     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 680       // Don't print anything if we are being killed.
 681     } else {
 682       jio_fprintf(defaultStream::error_stream(), "Exception ");
 683       if (thread != NULL && thread->threadObj() != NULL) {
 684         ResourceMark rm(THREAD);
 685         jio_fprintf(defaultStream::error_stream(),
 686         "in thread \"%s\" ", thread->get_thread_name());
 687       }
 688       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 689         JavaValue result(T_VOID);
 690         JavaCalls::call_virtual(&result,
 691                                 ex,
 692                                 SystemDictionary::Throwable_klass(),
 693                                 vmSymbols::printStackTrace_name(),
 694                                 vmSymbols::void_method_signature(),
 695                                 THREAD);
 696         // If an exception is thrown in the call it gets thrown away. Not much
 697         // we can do with it. The native code that calls this, does not check
 698         // for the exception - hence, it might still be in the thread when DestroyVM gets
 699         // called, potentially causing a few asserts to trigger - since no pending exception
 700         // is expected.
 701         CLEAR_PENDING_EXCEPTION;
 702       } else {
 703         ResourceMark rm(THREAD);
 704         jio_fprintf(defaultStream::error_stream(),
 705         ". Uncaught exception of type %s.",
 706         ex->klass()->external_name());
 707       }
 708     }
 709   }
 710 
 711   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 712 JNI_END
 713 
 714 
 715 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 716   JNIWrapper("ExceptionClear");
 717 
 718   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 719 
 720   // The jni code might be using this API to clear java thrown exception.
 721   // So just mark jvmti thread exception state as exception caught.
 722   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 723   if (state != NULL && state->is_exception_detected()) {
 724     state->set_exception_caught();
 725   }
 726   thread->clear_pending_exception();
 727 
 728   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 729 JNI_END
 730 
 731 
 732 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 733   JNIWrapper("FatalError");
 734 
 735   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 736 
 737   tty->print_cr("FATAL ERROR in native method: %s", msg);
 738   thread->print_stack();
 739   os::abort(); // Dump core and abort
 740 JNI_END
 741 
 742 
 743 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 744   JNIWrapper("PushLocalFrame");
 745 
 746   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 747 
 748   //%note jni_11
 749   if (capacity < 0 ||
 750       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 751     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 752     return JNI_ERR;
 753   }
 754   JNIHandleBlock* old_handles = thread->active_handles();
 755   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 756   assert(new_handles != NULL, "should not be NULL");
 757   new_handles->set_pop_frame_link(old_handles);
 758   thread->set_active_handles(new_handles);
 759   jint ret = JNI_OK;
 760   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 761   return ret;
 762 JNI_END
 763 
 764 
 765 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 766   JNIWrapper("PopLocalFrame");
 767 
 768   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 769 
 770   //%note jni_11
 771   Handle result_handle(thread, JNIHandles::resolve(result));
 772   JNIHandleBlock* old_handles = thread->active_handles();
 773   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 774   if (new_handles != NULL) {
 775     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 776     // This way code will still work if PopLocalFrame is called without a corresponding
 777     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 778     // the release_block call will release the blocks.
 779     thread->set_active_handles(new_handles);
 780     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 781     JNIHandleBlock::release_block(old_handles, thread); // may block
 782     result = JNIHandles::make_local(thread, result_handle());
 783   }
 784   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 785   return result;
 786 JNI_END
 787 
 788 
 789 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 790   JNIWrapper("NewGlobalRef");
 791 
 792   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 793 
 794   Handle ref_handle(thread, JNIHandles::resolve(ref));
 795   jobject ret = JNIHandles::make_global(ref_handle);
 796 
 797   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 798   return ret;
 799 JNI_END
 800 
 801 // Must be JNI_ENTRY (with HandleMark)
 802 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 803   JNIWrapper("DeleteGlobalRef");
 804 
 805   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 806 
 807   JNIHandles::destroy_global(ref);
 808 
 809   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 810 JNI_END
 811 
 812 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 813   JNIWrapper("DeleteLocalRef");
 814 
 815   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 816 
 817   JNIHandles::destroy_local(obj);
 818 
 819   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 820 JNI_END
 821 
 822 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 823   JNIWrapper("IsSameObject");
 824 
 825   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 826 
 827   oop a = JNIHandles::resolve(r1);
 828   oop b = JNIHandles::resolve(r2);
 829   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
 830 
 831   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 832   return ret;
 833 JNI_END
 834 
 835 
 836 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 837   JNIWrapper("NewLocalRef");
 838 
 839   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 840 
 841   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 842 
 843   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 844   return ret;
 845 JNI_END
 846 
 847 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 848   JNIWrapper("EnsureLocalCapacity");
 849 
 850   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 851 
 852   jint ret;
 853   if (capacity >= 0 &&
 854       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 855     ret = JNI_OK;
 856   } else {
 857     ret = JNI_ERR;
 858   }
 859 
 860   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 861   return ret;
 862 JNI_END
 863 
 864 // Return the Handle Type
 865 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 866   JNIWrapper("GetObjectRefType");
 867 
 868   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 869 
 870   jobjectRefType ret;
 871   if (JNIHandles::is_local_handle(thread, obj) ||
 872       JNIHandles::is_frame_handle(thread, obj))
 873     ret = JNILocalRefType;
 874   else if (JNIHandles::is_global_handle(obj))
 875     ret = JNIGlobalRefType;
 876   else if (JNIHandles::is_weak_global_handle(obj))
 877     ret = JNIWeakGlobalRefType;
 878   else
 879     ret = JNIInvalidRefType;
 880 
 881   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 882   return ret;
 883 JNI_END
 884 
 885 
 886 class JNI_ArgumentPusher : public SignatureIterator {
 887  protected:
 888   JavaCallArguments*  _arguments;
 889 
 890   virtual void get_bool   () = 0;
 891   virtual void get_char   () = 0;
 892   virtual void get_short  () = 0;
 893   virtual void get_byte   () = 0;
 894   virtual void get_int    () = 0;
 895   virtual void get_long   () = 0;
 896   virtual void get_float  () = 0;
 897   virtual void get_double () = 0;
 898   virtual void get_object () = 0;
 899 
 900   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 901     this->_return_type = T_ILLEGAL;
 902     _arguments = NULL;
 903   }
 904 
 905  public:
 906   virtual void iterate( uint64_t fingerprint ) = 0;
 907 
 908   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 909 
 910   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 911   inline void do_char()                     { if (!is_return_type()) get_char();   }
 912   inline void do_short()                    { if (!is_return_type()) get_short();  }
 913   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 914   inline void do_int()                      { if (!is_return_type()) get_int();    }
 915   inline void do_long()                     { if (!is_return_type()) get_long();   }
 916   inline void do_float()                    { if (!is_return_type()) get_float();  }
 917   inline void do_double()                   { if (!is_return_type()) get_double(); }
 918   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 919   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 920   inline void do_void()                     { }
 921 
 922   JavaCallArguments* arguments()     { return _arguments; }
 923   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 924 };
 925 
 926 
 927 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 928  protected:
 929   va_list _ap;
 930 
 931   inline void get_bool()   {
 932     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 933     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 934     // TemplateInterpreterGenerator::generate_result_handler_for and
 935     // SharedRuntime::generate_native_wrapper.
 936     jboolean b = va_arg(_ap, jint);
 937     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
 938   }
 939   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
 940   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
 941   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
 942   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }
 943 
 944   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 945 
 946   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }
 947   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
 948   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
 949   inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
 950 
 951   inline void set_ap(va_list rap) {
 952     va_copy(_ap, rap);
 953   }
 954 
 955  public:
 956   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 957        : JNI_ArgumentPusher(signature) {
 958     set_ap(rap);
 959   }
 960   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 961       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 962     set_ap(rap);
 963   }
 964 
 965   // Optimized path if we have the bitvector form of signature
 966   void iterate( uint64_t fingerprint ) {
 967     if (fingerprint == (uint64_t)CONST64(-1)) {
 968       SignatureIterator::iterate(); // Must be too many arguments
 969     } else {
 970       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 971                                   result_feature_mask);
 972 
 973       assert(fingerprint, "Fingerprint should not be 0");
 974       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 975       while ( 1 ) {
 976         switch ( fingerprint & parameter_feature_mask ) {
 977           case bool_parm:
 978             get_bool();
 979             break;
 980           case char_parm:
 981             get_char();
 982             break;
 983           case short_parm:
 984             get_short();
 985             break;
 986           case byte_parm:
 987             get_byte();
 988             break;
 989           case int_parm:
 990             get_int();
 991             break;
 992           case obj_parm:
 993             get_object();
 994             break;
 995           case long_parm:
 996             get_long();
 997             break;
 998           case float_parm:
 999             get_float();
1000             break;
1001           case double_parm:
1002             get_double();
1003             break;
1004           case done_parm:
1005             return;
1006             break;
1007           default:
1008             ShouldNotReachHere();
1009             break;
1010         }
1011         fingerprint >>= parameter_feature_size;
1012       }
1013     }
1014   }
1015 };
1016 
1017 
1018 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1019  protected:
1020   const jvalue *_ap;
1021 
1022   inline void get_bool()   {
1023     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1024     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
1025     // TemplateInterpreterGenerator::generate_result_handler_for and
1026     // SharedRuntime::generate_native_wrapper.
1027     jboolean b = (_ap++)->z;
1028     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1029   }
1030   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1031   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1032   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1033   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1034 
1035   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1036   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1037   inline void get_double() { _arguments->push_double((_ap++)->d);}
1038   inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1039 
1040   inline void set_ap(const jvalue *rap) { _ap = rap; }
1041 
1042  public:
1043   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1044        : JNI_ArgumentPusher(signature) {
1045     set_ap(rap);
1046   }
1047   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1048       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1049     set_ap(rap);
1050   }
1051 
1052   // Optimized path if we have the bitvector form of signature
1053   void iterate( uint64_t fingerprint ) {
1054     if (fingerprint == (uint64_t)CONST64(-1)) {
1055       SignatureIterator::iterate(); // Must be too many arguments
1056     } else {
1057       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1058                                   result_feature_mask);
1059       assert(fingerprint, "Fingerprint should not be 0");
1060       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1061       while ( 1 ) {
1062         switch ( fingerprint & parameter_feature_mask ) {
1063           case bool_parm:
1064             get_bool();
1065             break;
1066           case char_parm:
1067             get_char();
1068             break;
1069           case short_parm:
1070             get_short();
1071             break;
1072           case byte_parm:
1073             get_byte();
1074             break;
1075           case int_parm:
1076             get_int();
1077             break;
1078           case obj_parm:
1079             get_object();
1080             break;
1081           case long_parm:
1082             get_long();
1083             break;
1084           case float_parm:
1085             get_float();
1086             break;
1087           case double_parm:
1088             get_double();
1089             break;
1090           case done_parm:
1091             return;
1092             break;
1093           default:
1094             ShouldNotReachHere();
1095             break;
1096         }
1097         fingerprint >>= parameter_feature_size;
1098       }
1099     }
1100   }
1101 };
1102 
1103 
1104 enum JNICallType {
1105   JNI_STATIC,
1106   JNI_VIRTUAL,
1107   JNI_NONVIRTUAL
1108 };
1109 
1110 
1111 
1112 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1113   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1114 
1115   // Create object to hold arguments for the JavaCall, and associate it with
1116   // the jni parser
1117   ResourceMark rm(THREAD);
1118   int number_of_parameters = method->size_of_parameters();
1119   JavaCallArguments java_args(number_of_parameters);
1120   args->set_java_argument_object(&java_args);
1121 
1122   assert(method->is_static(), "method should be static");
1123 
1124   // Fill out JavaCallArguments object
1125   args->iterate( Fingerprinter(method).fingerprint() );
1126   // Initialize result type
1127   result->set_type(args->get_ret_type());
1128 
1129   // Invoke the method. Result is returned as oop.
1130   JavaCalls::call(result, method, &java_args, CHECK);
1131 
1132   // Convert result
1133   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1134     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1135   }
1136 }
1137 
1138 
1139 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1140   oop recv = JNIHandles::resolve(receiver);
1141   if (recv == NULL) {
1142     THROW(vmSymbols::java_lang_NullPointerException());
1143   }
1144   Handle h_recv(THREAD, recv);
1145 
1146   int number_of_parameters;
1147   Method* selected_method;
1148   {
1149     Method* m = Method::resolve_jmethod_id(method_id);
1150     number_of_parameters = m->size_of_parameters();
1151     Klass* holder = m->method_holder();
1152     if (call_type != JNI_VIRTUAL) {
1153         selected_method = m;
1154     } else if (!m->has_itable_index()) {
1155       // non-interface call -- for that little speed boost, don't handlize
1156       debug_only(NoSafepointVerifier nosafepoint;)
1157       // jni_GetMethodID makes sure class is linked and initialized
1158       // so m should have a valid vtable index.
1159       assert(m->valid_vtable_index(), "no valid vtable index");
1160       int vtbl_index = m->vtable_index();
1161       if (vtbl_index != Method::nonvirtual_vtable_index) {
1162         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1163       } else {
1164         // final method
1165         selected_method = m;
1166       }
1167     } else {
1168       // interface call
1169       int itbl_index = m->itable_index();
1170       Klass* k = h_recv->klass();
1171       selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1172     }
1173   }
1174 
1175   methodHandle method(THREAD, selected_method);
1176 
1177   // Create object to hold arguments for the JavaCall, and associate it with
1178   // the jni parser
1179   ResourceMark rm(THREAD);
1180   JavaCallArguments java_args(number_of_parameters);
1181   args->set_java_argument_object(&java_args);
1182 
1183   // handle arguments
1184   assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1185   args->push_receiver(h_recv); // Push jobject handle
1186 
1187   // Fill out JavaCallArguments object
1188   args->iterate( Fingerprinter(method).fingerprint() );
1189   // Initialize result type
1190   result->set_type(args->get_ret_type());
1191 
1192   // Invoke the method. Result is returned as oop.
1193   JavaCalls::call(result, method, &java_args, CHECK);
1194 
1195   // Convert result
1196   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1197     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1198   }
1199 }
1200 
1201 
1202 static instanceOop alloc_object(jclass clazz, TRAPS) {
1203   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1204   if (k == NULL) {
1205     ResourceMark rm(THREAD);
1206     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1207   }
1208   k->check_valid_for_instantiation(false, CHECK_NULL);
1209   k->initialize(CHECK_NULL);
1210   instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1211   return ih;
1212 }
1213 
1214 DT_RETURN_MARK_DECL(AllocObject, jobject
1215                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1216 
1217 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1218   JNIWrapper("AllocObject");
1219 
1220   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1221 
1222   jobject ret = NULL;
1223   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1224 
1225   instanceOop i = alloc_object(clazz, CHECK_NULL);
1226   ret = JNIHandles::make_local(env, i);
1227   return ret;
1228 JNI_END
1229 
1230 DT_RETURN_MARK_DECL(NewObjectA, jobject
1231                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1232 
1233 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1234   JNIWrapper("NewObjectA");
1235 
1236   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1237 
1238   jobject obj = NULL;
1239   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1240 
1241   instanceOop i = alloc_object(clazz, CHECK_NULL);
1242   obj = JNIHandles::make_local(env, i);
1243   JavaValue jvalue(T_VOID);
1244   JNI_ArgumentPusherArray ap(methodID, args);
1245   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1246   return obj;
1247 JNI_END
1248 
1249 
1250 DT_RETURN_MARK_DECL(NewObjectV, jobject
1251                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1252 
1253 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1254   JNIWrapper("NewObjectV");
1255 
1256   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1257 
1258   jobject obj = NULL;
1259   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1260 
1261   instanceOop i = alloc_object(clazz, CHECK_NULL);
1262   obj = JNIHandles::make_local(env, i);
1263   JavaValue jvalue(T_VOID);
1264   JNI_ArgumentPusherVaArg ap(methodID, args);
1265   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1266   return obj;
1267 JNI_END
1268 
1269 
1270 DT_RETURN_MARK_DECL(NewObject, jobject
1271                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1272 
1273 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1274   JNIWrapper("NewObject");
1275 
1276   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1277 
1278   jobject obj = NULL;
1279   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1280 
1281   instanceOop i = alloc_object(clazz, CHECK_NULL);
1282   obj = JNIHandles::make_local(env, i);
1283   va_list args;
1284   va_start(args, methodID);
1285   JavaValue jvalue(T_VOID);
1286   JNI_ArgumentPusherVaArg ap(methodID, args);
1287   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1288   va_end(args);
1289   return obj;
1290 JNI_END
1291 
1292 
1293 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1294   JNIWrapper("GetObjectClass");
1295 
1296   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1297 
1298   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1299   jclass ret =
1300     (jclass) JNIHandles::make_local(env, k->java_mirror());
1301 
1302   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1303   return ret;
1304 JNI_END
1305 
1306 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1307   JNIWrapper("IsInstanceOf");
1308 
1309   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1310 
1311   jboolean ret = JNI_TRUE;
1312   if (obj != NULL) {
1313     ret = JNI_FALSE;
1314     Klass* k = java_lang_Class::as_Klass(
1315       JNIHandles::resolve_non_null(clazz));
1316     if (k != NULL) {
1317       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1318     }
1319   }
1320 
1321   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1322   return ret;
1323 JNI_END
1324 
1325 
1326 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1327                                const char *sig, bool is_static, TRAPS) {
1328   // %%%% This code should probably just call into a method in the LinkResolver
1329   //
1330   // The class should have been loaded (we have an instance of the class
1331   // passed in) so the method and signature should already be in the symbol
1332   // table.  If they're not there, the method doesn't exist.
1333   const char *name_to_probe = (name_str == NULL)
1334                         ? vmSymbols::object_initializer_name()->as_C_string()
1335                         : name_str;
1336   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1337   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1338 
1339   if (name == NULL || signature == NULL) {
1340     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341   }
1342 
1343   // Throw a NoSuchMethodError exception if we have an instance of a
1344   // primitive java.lang.Class
1345   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1346     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1347   }
1348 
1349   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1350 
1351   // Make sure class is linked and initialized before handing id's out to
1352   // Method*s.
1353   klass->initialize(CHECK_NULL);
1354 
1355   Method* m;
1356   if (name == vmSymbols::object_initializer_name() ||
1357       name == vmSymbols::class_initializer_name()) {
1358     // Never search superclasses for constructors
1359     if (klass->is_instance_klass()) {
1360       m = InstanceKlass::cast(klass)->find_method(name, signature);
1361     } else {
1362       m = NULL;
1363     }
1364   } else {
1365     m = klass->lookup_method(name, signature);
1366     if (m == NULL &&  klass->is_instance_klass()) {
1367       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1368     }
1369   }
1370   if (m == NULL || (m->is_static() != is_static)) {
1371     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1372   }
1373   return m->jmethod_id();
1374 }
1375 
1376 
1377 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1378           const char *name, const char *sig))
1379   JNIWrapper("GetMethodID");
1380   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1381   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1382   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1383   return ret;
1384 JNI_END
1385 
1386 
1387 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1388           const char *name, const char *sig))
1389   JNIWrapper("GetStaticMethodID");
1390   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1391   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1392   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1393   return ret;
1394 JNI_END
1395 
1396 
1397 
1398 //
1399 // Calling Methods
1400 //
1401 
1402 
1403 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1404                           , EntryProbe, ReturnProbe)    \
1405 \
1406   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1407                           , ReturnProbe);                          \
1408 \
1409 JNI_ENTRY(ResultType, \
1410           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1411   JNIWrapper("Call" XSTR(Result) "Method"); \
1412 \
1413   EntryProbe; \
1414   ResultType ret = 0;\
1415   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1416                      (const ResultType&)ret);\
1417 \
1418   va_list args; \
1419   va_start(args, methodID); \
1420   JavaValue jvalue(Tag); \
1421   JNI_ArgumentPusherVaArg ap(methodID, args); \
1422   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1423   va_end(args); \
1424   ret = jvalue.get_##ResultType(); \
1425   return ret;\
1426 JNI_END
1427 
1428 // the runtime type of subword integral basic types is integer
1429 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1430                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1433                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1436                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1439                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1441 
1442 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1443                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1445 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1446                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1448 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1449                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1450                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1451 // Float and double probes don't return value because dtrace doesn't currently support it
1452 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1453                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1454                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1455 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1456                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1457                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1458 
1459 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1460                           , EntryProbe, ReturnProbe)    \
1461 \
1462   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1463                           , ReturnProbe);                          \
1464 \
1465 JNI_ENTRY(ResultType, \
1466           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1467   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1468 \
1469   EntryProbe;\
1470   ResultType ret = 0;\
1471   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1472                      (const ResultType&)ret);\
1473 \
1474   JavaValue jvalue(Tag); \
1475   JNI_ArgumentPusherVaArg ap(methodID, args); \
1476   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1477   ret = jvalue.get_##ResultType(); \
1478   return ret;\
1479 JNI_END
1480 
1481 // the runtime type of subword integral basic types is integer
1482 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1483                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1486                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1489                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1492                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1494 
1495 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1496                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1498 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1499                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1501 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1502                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1503                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1504 // Float and double probes don't return value because dtrace doesn't currently support it
1505 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1506                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1507                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1508 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1509                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1510                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1511 
1512 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1513                           , EntryProbe, ReturnProbe)    \
1514 \
1515   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1516                           , ReturnProbe);                          \
1517 \
1518 JNI_ENTRY(ResultType, \
1519           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1520   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1521   EntryProbe; \
1522   ResultType ret = 0;\
1523   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1524                      (const ResultType&)ret);\
1525 \
1526   JavaValue jvalue(Tag); \
1527   JNI_ArgumentPusherArray ap(methodID, args); \
1528   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1529   ret = jvalue.get_##ResultType(); \
1530   return ret;\
1531 JNI_END
1532 
1533 // the runtime type of subword integral basic types is integer
1534 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1535                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1538                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1541                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1544                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1546 
1547 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1548                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1550 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1551                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1553 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1554                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1555                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1556 // Float and double probes don't return value because dtrace doesn't currently support it
1557 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1558                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1559                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1560 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1561                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1562                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1563 
1564 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1567 
1568 
1569 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1570   JNIWrapper("CallVoidMethod");
1571   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1572   DT_VOID_RETURN_MARK(CallVoidMethod);
1573 
1574   va_list args;
1575   va_start(args, methodID);
1576   JavaValue jvalue(T_VOID);
1577   JNI_ArgumentPusherVaArg ap(methodID, args);
1578   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1579   va_end(args);
1580 JNI_END
1581 
1582 
1583 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1584   JNIWrapper("CallVoidMethodV");
1585   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1586   DT_VOID_RETURN_MARK(CallVoidMethodV);
1587 
1588   JavaValue jvalue(T_VOID);
1589   JNI_ArgumentPusherVaArg ap(methodID, args);
1590   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1591 JNI_END
1592 
1593 
1594 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1595   JNIWrapper("CallVoidMethodA");
1596   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1597   DT_VOID_RETURN_MARK(CallVoidMethodA);
1598 
1599   JavaValue jvalue(T_VOID);
1600   JNI_ArgumentPusherArray ap(methodID, args);
1601   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1602 JNI_END
1603 
1604 
1605 
1606 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1607                                     , EntryProbe, ReturnProbe)      \
1608 \
1609   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1610                           , ReturnProbe);\
1611 \
1612 JNI_ENTRY(ResultType, \
1613           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1614   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1615 \
1616   EntryProbe;\
1617   ResultType ret;\
1618   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1619                      (const ResultType&)ret);\
1620 \
1621   va_list args; \
1622   va_start(args, methodID); \
1623   JavaValue jvalue(Tag); \
1624   JNI_ArgumentPusherVaArg ap(methodID, args); \
1625   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1626   va_end(args); \
1627   ret = jvalue.get_##ResultType(); \
1628   return ret;\
1629 JNI_END
1630 
1631 // the runtime type of subword integral basic types is integer
1632 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1633                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1635 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1636                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1639                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1642                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1644 
1645 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1646                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1649                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1651 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1652                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1653 // Float and double probes don't return value because dtrace doesn't currently support it
1654                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1655 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1656                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1657                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1658 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1659                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1660                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1661 
1662 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1663                                     , EntryProbe, ReturnProbe)      \
1664 \
1665   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1666                           , ReturnProbe);\
1667 \
1668 JNI_ENTRY(ResultType, \
1669           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1670   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1671 \
1672   EntryProbe;\
1673   ResultType ret;\
1674   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1675                      (const ResultType&)ret);\
1676 \
1677   JavaValue jvalue(Tag); \
1678   JNI_ArgumentPusherVaArg ap(methodID, args); \
1679   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1680   ret = jvalue.get_##ResultType(); \
1681   return ret;\
1682 JNI_END
1683 
1684 // the runtime type of subword integral basic types is integer
1685 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1686                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1688 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1689                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1692                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1695                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1697 
1698 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1699                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1702                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1704 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1705                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1706 // Float and double probes don't return value because dtrace doesn't currently support it
1707                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1708 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1709                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1710                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1711 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1712                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1713                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1714 
1715 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1716                                     , EntryProbe, ReturnProbe)      \
1717 \
1718   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1719                           , ReturnProbe);\
1720 \
1721 JNI_ENTRY(ResultType, \
1722           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1723   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1724 \
1725   EntryProbe;\
1726   ResultType ret;\
1727   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1728                      (const ResultType&)ret);\
1729 \
1730   JavaValue jvalue(Tag); \
1731   JNI_ArgumentPusherArray ap(methodID, args); \
1732   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1733   ret = jvalue.get_##ResultType(); \
1734   return ret;\
1735 JNI_END
1736 
1737 // the runtime type of subword integral basic types is integer
1738 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1739                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1741 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1742                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1745                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1748                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1750 
1751 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1752                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1755                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1757 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1758                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1759 // Float and double probes don't return value because dtrace doesn't currently support it
1760                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1761 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1762                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1763                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1764 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1765                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1766                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1767 
1768 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1769                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1770 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1771                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1772 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1773                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1774 
1775 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1776   JNIWrapper("CallNonvirtualVoidMethod");
1777 
1778   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1779   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1780 
1781   va_list args;
1782   va_start(args, methodID);
1783   JavaValue jvalue(T_VOID);
1784   JNI_ArgumentPusherVaArg ap(methodID, args);
1785   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1786   va_end(args);
1787 JNI_END
1788 
1789 
1790 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1791   JNIWrapper("CallNonvirtualVoidMethodV");
1792 
1793   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1794                env, obj, cls, (uintptr_t) methodID);
1795   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1796 
1797   JavaValue jvalue(T_VOID);
1798   JNI_ArgumentPusherVaArg ap(methodID, args);
1799   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1800 JNI_END
1801 
1802 
1803 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1804   JNIWrapper("CallNonvirtualVoidMethodA");
1805   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1806                 env, obj, cls, (uintptr_t) methodID);
1807   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1808   JavaValue jvalue(T_VOID);
1809   JNI_ArgumentPusherArray ap(methodID, args);
1810   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1811 JNI_END
1812 
1813 
1814 
1815 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1816                                 , EntryProbe, ResultProbe) \
1817 \
1818   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1819                           , ResultProbe);                               \
1820 \
1821 JNI_ENTRY(ResultType, \
1822           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1823   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1824 \
1825   EntryProbe; \
1826   ResultType ret = 0;\
1827   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1828                      (const ResultType&)ret);\
1829 \
1830   va_list args; \
1831   va_start(args, methodID); \
1832   JavaValue jvalue(Tag); \
1833   JNI_ArgumentPusherVaArg ap(methodID, args); \
1834   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1835   va_end(args); \
1836   ret = jvalue.get_##ResultType(); \
1837   return ret;\
1838 JNI_END
1839 
1840 // the runtime type of subword integral basic types is integer
1841 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1842                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1844 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1845                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1848                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1851                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1853 
1854 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1855                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1857 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1858                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1860 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1861                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1862                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1863 // Float and double probes don't return value because dtrace doesn't currently support it
1864 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1865                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1866                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1867 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1868                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1869                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1870 
1871 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1872                                 , EntryProbe, ResultProbe) \
1873 \
1874   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1875                           , ResultProbe);                               \
1876 \
1877 JNI_ENTRY(ResultType, \
1878           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1879   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1880 \
1881   EntryProbe; \
1882   ResultType ret = 0;\
1883   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1884                      (const ResultType&)ret);\
1885 \
1886   JavaValue jvalue(Tag); \
1887   JNI_ArgumentPusherVaArg ap(methodID, args); \
1888   /* Make sure class is initialized before trying to invoke its method */ \
1889   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1890   k->initialize(CHECK_0); \
1891   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1892   va_end(args); \
1893   ret = jvalue.get_##ResultType(); \
1894   return ret;\
1895 JNI_END
1896 
1897 // the runtime type of subword integral basic types is integer
1898 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1899                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1901 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1902                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1905                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1908                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1910 
1911 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1912                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1914 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1915                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1917 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1918                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1919                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1920 // Float and double probes don't return value because dtrace doesn't currently support it
1921 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1922                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1923                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1924 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1925                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1926                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1927 
1928 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1929                                 , EntryProbe, ResultProbe) \
1930 \
1931   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1932                           , ResultProbe);                               \
1933 \
1934 JNI_ENTRY(ResultType, \
1935           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1936   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1937 \
1938   EntryProbe; \
1939   ResultType ret = 0;\
1940   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1941                      (const ResultType&)ret);\
1942 \
1943   JavaValue jvalue(Tag); \
1944   JNI_ArgumentPusherArray ap(methodID, args); \
1945   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1946   ret = jvalue.get_##ResultType(); \
1947   return ret;\
1948 JNI_END
1949 
1950 // the runtime type of subword integral basic types is integer
1951 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1952                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1954 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1955                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1958                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1961                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1963 
1964 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1965                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1967 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1968                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1970 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1971                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1972                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1973 // Float and double probes don't return value because dtrace doesn't currently support it
1974 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1975                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1976                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1977 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1978                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1979                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1980 
1981 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1982                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1983 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1984                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1985 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1986                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1987 
1988 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1989   JNIWrapper("CallStaticVoidMethod");
1990   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1991   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1992 
1993   va_list args;
1994   va_start(args, methodID);
1995   JavaValue jvalue(T_VOID);
1996   JNI_ArgumentPusherVaArg ap(methodID, args);
1997   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1998   va_end(args);
1999 JNI_END
2000 
2001 
2002 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2003   JNIWrapper("CallStaticVoidMethodV");
2004   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2005   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2006 
2007   JavaValue jvalue(T_VOID);
2008   JNI_ArgumentPusherVaArg ap(methodID, args);
2009   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2010 JNI_END
2011 
2012 
2013 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2014   JNIWrapper("CallStaticVoidMethodA");
2015   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2016   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2017 
2018   JavaValue jvalue(T_VOID);
2019   JNI_ArgumentPusherArray ap(methodID, args);
2020   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2021 JNI_END
2022 
2023 
2024 //
2025 // Accessing Fields
2026 //
2027 
2028 
2029 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2030                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2031 
2032 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2033           const char *name, const char *sig))
2034   JNIWrapper("GetFieldID");
2035   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2036   jfieldID ret = 0;
2037   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2038 
2039   // The class should have been loaded (we have an instance of the class
2040   // passed in) so the field and signature should already be in the symbol
2041   // table.  If they're not there, the field doesn't exist.
2042   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2043   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2044   if (fieldname == NULL || signame == NULL) {
2045     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2046   }
2047   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2048   // Make sure class is initialized before handing id's out to fields
2049   k->initialize(CHECK_NULL);
2050 
2051   fieldDescriptor fd;
2052   if (!k->is_instance_klass() ||
2053       !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2054     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2055   }
2056 
2057   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2058   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2059   ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2060   return ret;
2061 JNI_END
2062 
2063 
2064 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2065   JNIWrapper("GetObjectField");
2066   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2067   oop o = JNIHandles::resolve_non_null(obj);
2068   Klass* k = o->klass();
2069   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2070   // Keep JVMTI addition small and only check enabled flag here.
2071   // jni_GetField_probe() assumes that is okay to create handles.
2072   if (JvmtiExport::should_post_field_access()) {
2073     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2074   }
2075   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2076 #if INCLUDE_ALL_GCS
2077   // If G1 is enabled and we are accessing the value of the referent
2078   // field in a reference object then we need to register a non-null
2079   // referent with the SATB barrier.
2080   if (UseG1GC) {
2081     bool needs_barrier = false;
2082 
2083     if (ret != NULL &&
2084         offset == java_lang_ref_Reference::referent_offset &&
2085         InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2086       assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2087       needs_barrier = true;
2088     }
2089 
2090     if (needs_barrier) {
2091       oop referent = JNIHandles::resolve(ret);
2092       G1SATBCardTableModRefBS::enqueue(referent);
2093     }
2094   }
2095 #endif // INCLUDE_ALL_GCS
2096 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2097   return ret;
2098 JNI_END
2099 
2100 
2101 
2102 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2103   , EntryProbe, ReturnProbe) \
2104 \
2105   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2106   , ReturnProbe); \
2107 \
2108 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2109   JNIWrapper("Get" XSTR(Result) "Field"); \
2110 \
2111   EntryProbe; \
2112   Return ret = 0;\
2113   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2114 \
2115   oop o = JNIHandles::resolve_non_null(obj); \
2116   Klass* k = o->klass(); \
2117   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2118   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2119   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2120   /* and creates a ResetNoHandleMark.                                   */ \
2121   if (JvmtiExport::should_post_field_access()) { \
2122     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2123   } \
2124   ret = o->Fieldname##_field(offset); \
2125   return ret; \
2126 JNI_END
2127 
2128 DEFINE_GETFIELD(jboolean, bool,   Boolean
2129                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jbyte,    byte,   Byte
2132                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jchar,    char,   Char
2135                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2137 DEFINE_GETFIELD(jshort,   short,  Short
2138                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2140 DEFINE_GETFIELD(jint,     int,    Int
2141                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2142                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2143 DEFINE_GETFIELD(jlong,    long,   Long
2144                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2145                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2146 // Float and double probes don't return value because dtrace doesn't currently support it
2147 DEFINE_GETFIELD(jfloat,   float,  Float
2148                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2149                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2150 DEFINE_GETFIELD(jdouble,  double, Double
2151                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2152                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2153 
2154 address jni_GetBooleanField_addr() {
2155   return (address)jni_GetBooleanField;
2156 }
2157 address jni_GetByteField_addr() {
2158   return (address)jni_GetByteField;
2159 }
2160 address jni_GetCharField_addr() {
2161   return (address)jni_GetCharField;
2162 }
2163 address jni_GetShortField_addr() {
2164   return (address)jni_GetShortField;
2165 }
2166 address jni_GetIntField_addr() {
2167   return (address)jni_GetIntField;
2168 }
2169 address jni_GetLongField_addr() {
2170   return (address)jni_GetLongField;
2171 }
2172 address jni_GetFloatField_addr() {
2173   return (address)jni_GetFloatField;
2174 }
2175 address jni_GetDoubleField_addr() {
2176   return (address)jni_GetDoubleField;
2177 }
2178 
2179 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2180   JNIWrapper("SetObjectField");
2181   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2182   oop o = JNIHandles::resolve_non_null(obj);
2183   Klass* k = o->klass();
2184   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2185   // Keep JVMTI addition small and only check enabled flag here.
2186   // jni_SetField_probe_nh() assumes that is not okay to create handles
2187   // and creates a ResetNoHandleMark.
2188   if (JvmtiExport::should_post_field_modification()) {
2189     jvalue field_value;
2190     field_value.l = value;
2191     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2192   }
2193   o->obj_field_put(offset, JNIHandles::resolve(value));
2194   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2195 JNI_END
2196 
2197 
2198 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2199                         , EntryProbe, ReturnProbe) \
2200 \
2201 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2202   JNIWrapper("Set" XSTR(Result) "Field"); \
2203 \
2204   EntryProbe; \
2205 \
2206   oop o = JNIHandles::resolve_non_null(obj); \
2207   Klass* k = o->klass(); \
2208   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2209   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2210   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2211   /* and creates a ResetNoHandleMark.                                   */ \
2212   if (JvmtiExport::should_post_field_modification()) { \
2213     jvalue field_value; \
2214     field_value.unionType = value; \
2215     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2216   } \
2217   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2218   o->Fieldname##_field_put(offset, value); \
2219   ReturnProbe; \
2220 JNI_END
2221 
2222 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2223                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2225 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2226                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2228 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2229                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2231 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2232                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2234 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2235                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2236                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2237 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2238                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2239                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2240 // Float and double probes don't return value because dtrace doesn't currently support it
2241 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2242                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2243                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2244 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2245                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2246                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2247 
2248 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2249                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2250 
2251 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2252   JNIWrapper("ToReflectedField");
2253   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2254   jobject ret = NULL;
2255   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2256 
2257   fieldDescriptor fd;
2258   bool found = false;
2259   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2260 
2261   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2262 
2263   if (isStatic) {
2264     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2265     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2266     assert(id->is_static_field_id(), "invalid static field id");
2267     found = id->find_local_field(&fd);
2268   } else {
2269     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2270     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2271     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2272   }
2273   assert(found, "bad fieldID passed into jni_ToReflectedField");
2274   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2275   ret = JNIHandles::make_local(env, reflected);
2276   return ret;
2277 JNI_END
2278 
2279 
2280 //
2281 // Accessing Static Fields
2282 //
2283 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2284                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2285 
2286 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2287           const char *name, const char *sig))
2288   JNIWrapper("GetStaticFieldID");
2289   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2290   jfieldID ret = NULL;
2291   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2292 
2293   // The class should have been loaded (we have an instance of the class
2294   // passed in) so the field and signature should already be in the symbol
2295   // table.  If they're not there, the field doesn't exist.
2296   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2297   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2298   if (fieldname == NULL || signame == NULL) {
2299     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2300   }
2301   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2302   // Make sure class is initialized before handing id's out to static fields
2303   k->initialize(CHECK_NULL);
2304 
2305   fieldDescriptor fd;
2306   if (!k->is_instance_klass() ||
2307       !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2308     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2309   }
2310 
2311   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2312   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2313   debug_only(id->set_is_static_field_id();)
2314 
2315   debug_only(id->verify(fd.field_holder()));
2316 
2317   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2318   return ret;
2319 JNI_END
2320 
2321 
2322 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2323   JNIWrapper("GetStaticObjectField");
2324   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2325 #if INCLUDE_JNI_CHECK
2326   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2327 #endif // INCLUDE_JNI_CHECK
2328   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2329   assert(id->is_static_field_id(), "invalid static field id");
2330   // Keep JVMTI addition small and only check enabled flag here.
2331   // jni_GetField_probe() assumes that is okay to create handles.
2332   if (JvmtiExport::should_post_field_access()) {
2333     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2334   }
2335   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2336   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2337   return ret;
2338 JNI_END
2339 
2340 
2341 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2342                               , EntryProbe, ReturnProbe) \
2343 \
2344   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2345                           , ReturnProbe);                                          \
2346 \
2347 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2348   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2349   EntryProbe; \
2350   Return ret = 0;\
2351   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2352                      (const Return&)ret);\
2353   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2354   assert(id->is_static_field_id(), "invalid static field id"); \
2355   /* Keep JVMTI addition small and only check enabled flag here. */ \
2356   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2357   if (JvmtiExport::should_post_field_access()) { \
2358     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2359   } \
2360   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2361   return ret;\
2362 JNI_END
2363 
2364 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2365                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2366 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2367                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2368 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2369                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2370 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2371                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2372 DEFINE_GETSTATICFIELD(jint,     int,    Int
2373                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2374 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2375                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2376 // Float and double probes don't return value because dtrace doesn't currently support it
2377 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2378                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2379 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2380                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2381 
2382 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2383   JNIWrapper("SetStaticObjectField");
2384  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2385   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2386   assert(id->is_static_field_id(), "invalid static field id");
2387   // Keep JVMTI addition small and only check enabled flag here.
2388   // jni_SetField_probe() assumes that is okay to create handles.
2389   if (JvmtiExport::should_post_field_modification()) {
2390     jvalue field_value;
2391     field_value.l = value;
2392     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2393   }
2394   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2395   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2396 JNI_END
2397 
2398 
2399 
2400 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2401                               , EntryProbe, ReturnProbe) \
2402 \
2403 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2404   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2405   EntryProbe; \
2406 \
2407   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2408   assert(id->is_static_field_id(), "invalid static field id"); \
2409   /* Keep JVMTI addition small and only check enabled flag here. */ \
2410   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2411   if (JvmtiExport::should_post_field_modification()) { \
2412     jvalue field_value; \
2413     field_value.unionType = value; \
2414     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2415   } \
2416   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2417   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2418   ReturnProbe;\
2419 JNI_END
2420 
2421 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2422                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2423                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2425                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2428                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2430 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2431                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2432                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2433 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2434                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2435                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2436 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2437                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2438                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2439 // Float and double probes don't return value because dtrace doesn't currently support it
2440 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2441                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2442                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2443 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2444                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2445                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2446 
2447 //
2448 // String Operations
2449 //
2450 
2451 // Unicode Interface
2452 
2453 DT_RETURN_MARK_DECL(NewString, jstring
2454                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2455 
2456 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2457   JNIWrapper("NewString");
2458  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2459   jstring ret = NULL;
2460   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2461   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2462   ret = (jstring) JNIHandles::make_local(env, string);
2463   return ret;
2464 JNI_END
2465 
2466 
2467 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2468   JNIWrapper("GetStringLength");
2469   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2470   jsize ret = 0;
2471   oop s = JNIHandles::resolve_non_null(string);
2472   if (java_lang_String::value(s) != NULL) {
2473     ret = java_lang_String::length(s);
2474   }
2475  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2476   return ret;
2477 JNI_END
2478 
2479 
2480 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2481   JNIEnv *env, jstring string, jboolean *isCopy))
2482   JNIWrapper("GetStringChars");
2483  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2484   jchar* buf = NULL;
2485   oop s = JNIHandles::resolve_non_null(string);
2486   typeArrayOop s_value = java_lang_String::value(s);
2487   if (s_value != NULL) {
2488     int s_len = java_lang_String::length(s);
2489     bool is_latin1 = java_lang_String::is_latin1(s);
2490     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2491     /* JNI Specification states return NULL on OOM */
2492     if (buf != NULL) {
2493       if (s_len > 0) {
2494         if (!is_latin1) {
2495           memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2496         } else {
2497           for (int i = 0; i < s_len; i++) {
2498             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2499           }
2500         }
2501       }
2502       buf[s_len] = 0;
2503       //%note jni_5
2504       if (isCopy != NULL) {
2505         *isCopy = JNI_TRUE;
2506       }
2507     }
2508   }
2509   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2510   return buf;
2511 JNI_END
2512 
2513 
2514 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2515   JNIWrapper("ReleaseStringChars");
2516   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2517   //%note jni_6
2518   if (chars != NULL) {
2519     // Since String objects are supposed to be immutable, don't copy any
2520     // new data back.  A bad user will have to go after the char array.
2521     FreeHeap((void*) chars);
2522   }
2523   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2524 JNI_END
2525 
2526 
2527 // UTF Interface
2528 
2529 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2530                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2531 
2532 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2533   JNIWrapper("NewStringUTF");
2534   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2535   jstring ret;
2536   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2537 
2538   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2539   ret = (jstring) JNIHandles::make_local(env, result);
2540   return ret;
2541 JNI_END
2542 
2543 
2544 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2545   JNIWrapper("GetStringUTFLength");
2546  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2547   jsize ret = 0;
2548   oop java_string = JNIHandles::resolve_non_null(string);
2549   if (java_lang_String::value(java_string) != NULL) {
2550     ret = java_lang_String::utf8_length(java_string);
2551   }
2552   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2553   return ret;
2554 JNI_END
2555 
2556 
2557 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2558   JNIWrapper("GetStringUTFChars");
2559  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2560   char* result = NULL;
2561   oop java_string = JNIHandles::resolve_non_null(string);
2562   if (java_lang_String::value(java_string) != NULL) {
2563     size_t length = java_lang_String::utf8_length(java_string);
2564     /* JNI Specification states return NULL on OOM */
2565     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2566     if (result != NULL) {
2567       java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2568       if (isCopy != NULL) {
2569         *isCopy = JNI_TRUE;
2570       }
2571     }
2572   }
2573  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2574   return result;
2575 JNI_END
2576 
2577 
2578 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2579   JNIWrapper("ReleaseStringUTFChars");
2580  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2581   if (chars != NULL) {
2582     FreeHeap((char*) chars);
2583   }
2584 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2585 JNI_END
2586 
2587 
2588 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2589   JNIWrapper("GetArrayLength");
2590  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2591   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2592   assert(a->is_array(), "must be array");
2593   jsize ret = a->length();
2594  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2595   return ret;
2596 JNI_END
2597 
2598 
2599 //
2600 // Object Array Operations
2601 //
2602 
2603 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2604                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2605 
2606 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2607   JNIWrapper("NewObjectArray");
2608  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2609   jobjectArray ret = NULL;
2610   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2611   Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2612   Klass* ak = ek->array_klass(CHECK_NULL);
2613   ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2614   objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2615   oop initial_value = JNIHandles::resolve(initialElement);
2616   if (initial_value != NULL) {  // array already initialized with NULL
2617     for (int index = 0; index < length; index++) {
2618       result->obj_at_put(index, initial_value);
2619     }
2620   }
2621   ret = (jobjectArray) JNIHandles::make_local(env, result);
2622   return ret;
2623 JNI_END
2624 
2625 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2626                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2627 
2628 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2629   JNIWrapper("GetObjectArrayElement");
2630  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2631   jobject ret = NULL;
2632   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2633   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2634   if (a->is_within_bounds(index)) {
2635     ret = JNIHandles::make_local(env, a->obj_at(index));
2636     return ret;
2637   } else {
2638     char buf[jintAsStringSize];
2639     sprintf(buf, "%d", index);
2640     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2641   }
2642 JNI_END
2643 
2644 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2645                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2646 
2647 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2648   JNIWrapper("SetObjectArrayElement");
2649  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2650   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2651 
2652   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2653   oop v = JNIHandles::resolve(value);
2654   if (a->is_within_bounds(index)) {
2655     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2656       a->obj_at_put(index, v);
2657     } else {
2658       THROW(vmSymbols::java_lang_ArrayStoreException());
2659     }
2660   } else {
2661     char buf[jintAsStringSize];
2662     sprintf(buf, "%d", index);
2663     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2664   }
2665 JNI_END
2666 
2667 
2668 
2669 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2670                               ,EntryProbe,ReturnProbe)  \
2671 \
2672   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2673                       , ReturnProbe); \
2674 \
2675 JNI_ENTRY(Return, \
2676           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2677   JNIWrapper("New" XSTR(Result) "Array"); \
2678   EntryProbe; \
2679   Return ret = NULL;\
2680   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2681 \
2682   oop obj= oopFactory::Allocator(len, CHECK_0); \
2683   ret = (Return) JNIHandles::make_local(env, obj); \
2684   return ret;\
2685 JNI_END
2686 
2687 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2688                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2689                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2690 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2691                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2692                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2693 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2694                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2695                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2696 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2697                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2698                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2699 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2700                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2701                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2702 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2703                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2704                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2705 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float,
2706                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2707                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2708 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2709                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2710                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2711 
2712 // Return an address which will fault if the caller writes to it.
2713 
2714 static char* get_bad_address() {
2715   static char* bad_address = NULL;
2716   if (bad_address == NULL) {
2717     size_t size = os::vm_allocation_granularity();
2718     bad_address = os::reserve_memory(size);
2719     if (bad_address != NULL) {
2720       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2721                          /*is_committed*/false);
2722       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2723     }
2724   }
2725   return bad_address;
2726 }
2727 
2728 
2729 
2730 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2731                                       , EntryProbe, ReturnProbe) \
2732 \
2733 JNI_QUICK_ENTRY(ElementType*, \
2734           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2735   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2736   EntryProbe; \
2737   /* allocate an chunk of memory in c land */ \
2738   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2739   ElementType* result; \
2740   int len = a->length(); \
2741   if (len == 0) { \
2742     /* Empty array: legal but useless, can't return NULL. \
2743      * Return a pointer to something useless. \
2744      * Avoid asserts in typeArrayOop. */ \
2745     result = (ElementType*)get_bad_address(); \
2746   } else { \
2747     /* JNI Specification states return NULL on OOM */                    \
2748     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2749     if (result != NULL) {                                                \
2750       /* copy the array to the c chunk */                                \
2751       memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len);      \
2752       if (isCopy) {                                                      \
2753         *isCopy = JNI_TRUE;                                              \
2754       }                                                                  \
2755     }                                                                    \
2756   } \
2757   ReturnProbe; \
2758   return result; \
2759 JNI_END
2760 
2761 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2762                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2765                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2766                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2767 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2768                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2769                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2770 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2771                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2772                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2774                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2776 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2777                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2778                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2779 // Float and double probes don't return value because dtrace doesn't currently support it
2780 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2781                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2782                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2783 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2784                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2785                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2786 
2787 
2788 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2789                                           , EntryProbe, ReturnProbe);\
2790 \
2791 JNI_QUICK_ENTRY(void, \
2792           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2793                                              ElementType *buf, jint mode)) \
2794   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2795   EntryProbe; \
2796   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2797   int len = a->length(); \
2798   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2799     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2800       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2801     } \
2802     if ((mode == 0) || (mode == JNI_ABORT)) { \
2803       FreeHeap(buf); \
2804     } \
2805   } \
2806   ReturnProbe; \
2807 JNI_END
2808 
2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2810                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2811                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2813                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2814                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2816                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2817                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2819                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2820                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2821 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2822                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2823                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2824 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2825                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2826                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2827 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2828                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2829                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2830 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2831                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2832                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2833 
2834 
2835 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2836                                     , EntryProbe, ReturnProbe); \
2837   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2838                            , ReturnProbe); \
2839 \
2840 JNI_ENTRY(void, \
2841 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2842              jsize len, ElementType *buf)) \
2843   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2844   EntryProbe; \
2845   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2846   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2847   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2848     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2849   } else { \
2850     if (len > 0) { \
2851       int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2852       memcpy((u_char*) buf, \
2853              (u_char*) src->Tag##_at_addr(start), \
2854              len << sc);                          \
2855     } \
2856   } \
2857 JNI_END
2858 
2859 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2860                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2861                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2862 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2863                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2864                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2865 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2866                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2867                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2868 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2869                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2870                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2871 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2872                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2873                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2874 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2875                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2876                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2877 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2878                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2879                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2880 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2881                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2882                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2883 
2884 
2885 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2886                                     , EntryProbe, ReturnProbe); \
2887   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2888                            ,ReturnProbe);           \
2889 \
2890 JNI_ENTRY(void, \
2891 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2892              jsize len, const ElementType *buf)) \
2893   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2894   EntryProbe; \
2895   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2896   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2897   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2898     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2899   } else { \
2900     if (len > 0) { \
2901       int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2902       memcpy((u_char*) dst->Tag##_at_addr(start), \
2903              (u_char*) buf, \
2904              len << sc);    \
2905     } \
2906   } \
2907 JNI_END
2908 
2909 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2910                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2911                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2912 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2913                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2914                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2915 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2916                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2917                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2918 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2919                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2920                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2921 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2922                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2923                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2924 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2925                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2926                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2927 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2928                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2929                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2930 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2931                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2932                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2933 
2934 
2935 //
2936 // Interception of natives
2937 //
2938 
2939 // The RegisterNatives call being attempted tried to register with a method that
2940 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2941 // to see if the native method is now wrapped with the prefixes.  See the
2942 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2943 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2944 #if INCLUDE_JVMTI
2945   ResourceMark rm(THREAD);
2946   Method* method;
2947   int name_len = name->utf8_length();
2948   char* name_str = name->as_utf8();
2949   int prefix_count;
2950   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2951   for (int i = 0; i < prefix_count; i++) {
2952     char* prefix = prefixes[i];
2953     int prefix_len = (int)strlen(prefix);
2954 
2955     // try adding this prefix to the method name and see if it matches another method name
2956     int trial_len = name_len + prefix_len;
2957     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2958     strcpy(trial_name_str, prefix);
2959     strcat(trial_name_str, name_str);
2960     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2961     if (trial_name == NULL) {
2962       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2963     }
2964     method = k->lookup_method(trial_name, signature);
2965     if (method == NULL) {
2966       continue; // signature doesn't match, try the next prefix
2967     }
2968     if (method->is_native()) {
2969       method->set_is_prefixed_native();
2970       return method; // wahoo, we found a prefixed version of the method, return it
2971     }
2972     // found as non-native, so prefix is good, add it, probably just need more prefixes
2973     name_len = trial_len;
2974     name_str = trial_name_str;
2975   }
2976 #endif // INCLUDE_JVMTI
2977   return NULL; // not found
2978 }
2979 
2980 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2981   Method* method = k->lookup_method(name, signature);
2982   if (method == NULL) {
2983     ResourceMark rm;
2984     stringStream st;
2985     st.print("Method %s name or signature does not match",
2986              Method::name_and_sig_as_C_string(k, name, signature));
2987     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2988   }
2989   if (!method->is_native()) {
2990     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2991     method = find_prefixed_native(k, name, signature, THREAD);
2992     if (method == NULL) {
2993       ResourceMark rm;
2994       stringStream st;
2995       st.print("Method %s is not declared as native",
2996                Method::name_and_sig_as_C_string(k, name, signature));
2997       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2998     }
2999   }
3000 
3001   if (entry != NULL) {
3002     method->set_native_function(entry,
3003       Method::native_bind_event_is_interesting);
3004   } else {
3005     method->clear_native_function();
3006   }
3007   if (PrintJNIResolving) {
3008     ResourceMark rm(THREAD);
3009     tty->print_cr("[Registering JNI native method %s.%s]",
3010       method->method_holder()->external_name(),
3011       method->name()->as_C_string());
3012   }
3013   return true;
3014 }
3015 
3016 DT_RETURN_MARK_DECL(RegisterNatives, jint
3017                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3018 
3019 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3020                                     const JNINativeMethod *methods,
3021                                     jint nMethods))
3022   JNIWrapper("RegisterNatives");
3023   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3024   jint ret = 0;
3025   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3026 
3027   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3028 
3029   for (int index = 0; index < nMethods; index++) {
3030     const char* meth_name = methods[index].name;
3031     const char* meth_sig = methods[index].signature;
3032     int meth_name_len = (int)strlen(meth_name);
3033 
3034     // The class should have been loaded (we have an instance of the class
3035     // passed in) so the method and signature should already be in the symbol
3036     // table.  If they're not there, the method doesn't exist.
3037     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3038     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3039 
3040     if (name == NULL || signature == NULL) {
3041       ResourceMark rm;
3042       stringStream st;
3043       st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3044       // Must return negative value on failure
3045       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3046     }
3047 
3048     bool res = register_native(k, name, signature,
3049                                (address) methods[index].fnPtr, THREAD);
3050     if (!res) {
3051       ret = -1;
3052       break;
3053     }
3054   }
3055   return ret;
3056 JNI_END
3057 
3058 
3059 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3060   JNIWrapper("UnregisterNatives");
3061  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3062   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3063   //%note jni_2
3064   if (k->is_instance_klass()) {
3065     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3066       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3067       if (m->is_native()) {
3068         m->clear_native_function();
3069         m->set_signature_handler(NULL);
3070       }
3071     }
3072   }
3073  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3074   return 0;
3075 JNI_END
3076 
3077 //
3078 // Monitor functions
3079 //
3080 
3081 DT_RETURN_MARK_DECL(MonitorEnter, jint
3082                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3083 
3084 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3085  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3086   jint ret = JNI_ERR;
3087   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3088 
3089   // If the object is null, we can't do anything with it
3090   if (jobj == NULL) {
3091     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3092   }
3093 
3094   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3095   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3096   ret = JNI_OK;
3097   return ret;
3098 JNI_END
3099 
3100 DT_RETURN_MARK_DECL(MonitorExit, jint
3101                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3102 
3103 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3104  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3105   jint ret = JNI_ERR;
3106   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3107 
3108   // Don't do anything with a null object
3109   if (jobj == NULL) {
3110     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3111   }
3112 
3113   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3114   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3115 
3116   ret = JNI_OK;
3117   return ret;
3118 JNI_END
3119 
3120 //
3121 // Extensions
3122 //
3123 
3124 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3125                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3126 
3127 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3128   JNIWrapper("GetStringRegion");
3129  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3130   DT_VOID_RETURN_MARK(GetStringRegion);
3131   oop s = JNIHandles::resolve_non_null(string);
3132   int s_len = java_lang_String::length(s);
3133   if (start < 0 || len < 0 || start + len > s_len) {
3134     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3135   } else {
3136     if (len > 0) {
3137       typeArrayOop s_value = java_lang_String::value(s);
3138       bool is_latin1 = java_lang_String::is_latin1(s);
3139       if (!is_latin1) {
3140         memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3141       } else {
3142         for (int i = 0; i < len; i++) {
3143           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3144         }
3145       }
3146     }
3147   }
3148 JNI_END
3149 
3150 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3151                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3152 
3153 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3154   JNIWrapper("GetStringUTFRegion");
3155  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3156   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3157   oop s = JNIHandles::resolve_non_null(string);
3158   int s_len = java_lang_String::length(s);
3159   if (start < 0 || len < 0 || start + len > s_len) {
3160     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3161   } else {
3162     //%note jni_7
3163     if (len > 0) {
3164       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3165       java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3166       // as_utf8_string null-terminates the result string
3167     } else {
3168       // JDK null-terminates the buffer even in len is zero
3169       if (buf != NULL) {
3170         buf[0] = 0;
3171       }
3172     }
3173   }
3174 JNI_END
3175 
3176 
3177 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3178   JNIWrapper("GetPrimitiveArrayCritical");
3179  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3180   GCLocker::lock_critical(thread);
3181   if (isCopy != NULL) {
3182     *isCopy = JNI_FALSE;
3183   }
3184   oop a = JNIHandles::resolve_non_null(array);
3185   assert(a->is_array(), "just checking");
3186   BasicType type;
3187   if (a->is_objArray()) {
3188     type = T_OBJECT;
3189   } else {
3190     type = TypeArrayKlass::cast(a->klass())->element_type();
3191   }
3192   void* ret = arrayOop(a)->base(type);
3193  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3194   return ret;
3195 JNI_END
3196 
3197 
3198 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3199   JNIWrapper("ReleasePrimitiveArrayCritical");
3200   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3201   // The array, carray and mode arguments are ignored
3202   GCLocker::unlock_critical(thread);
3203 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3204 JNI_END
3205 
3206 
3207 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3208   JNIWrapper("GetStringCritical");
3209   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3210   GCLocker::lock_critical(thread);
3211   oop s = JNIHandles::resolve_non_null(string);
3212   typeArrayOop s_value = java_lang_String::value(s);
3213   bool is_latin1 = java_lang_String::is_latin1(s);
3214   if (isCopy != NULL) {
3215     *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3216   }
3217   jchar* ret;
3218   if (!is_latin1) {
3219     ret = (jchar*) s_value->base(T_CHAR);
3220   } else {
3221     // Inflate latin1 encoded string to UTF16
3222     int s_len = java_lang_String::length(s);
3223     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
3224     /* JNI Specification states return NULL on OOM */
3225     if (ret != NULL) {
3226       for (int i = 0; i < s_len; i++) {
3227         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3228       }
3229       ret[s_len] = 0;
3230     }
3231   }
3232  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3233   return ret;
3234 JNI_END
3235 
3236 
3237 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3238   JNIWrapper("ReleaseStringCritical");
3239   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3240   // The str and chars arguments are ignored for UTF16 strings
3241   oop s = JNIHandles::resolve_non_null(str);
3242   bool is_latin1 = java_lang_String::is_latin1(s);
3243   if (is_latin1) {
3244     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3245     // This assumes that ReleaseStringCritical bookends GetStringCritical.
3246     FREE_C_HEAP_ARRAY(jchar, chars);
3247   }
3248   GCLocker::unlock_critical(thread);
3249 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3250 JNI_END
3251 
3252 
3253 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3254   JNIWrapper("jni_NewWeakGlobalRef");
3255  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3256   Handle ref_handle(thread, JNIHandles::resolve(ref));
3257   jweak ret = JNIHandles::make_weak_global(ref_handle);
3258  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3259   return ret;
3260 JNI_END
3261 
3262 // Must be JNI_ENTRY (with HandleMark)
3263 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3264   JNIWrapper("jni_DeleteWeakGlobalRef");
3265   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3266   JNIHandles::destroy_weak_global(ref);
3267   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3268 JNI_END
3269 
3270 
3271 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3272   JNIWrapper("jni_ExceptionCheck");
3273  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3274   jni_check_async_exceptions(thread);
3275   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3276  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3277   return ret;
3278 JNI_END
3279 
3280 
3281 // Initialization state for three routines below relating to
3282 // java.nio.DirectBuffers
3283 static          jint directBufferSupportInitializeStarted = 0;
3284 static volatile jint directBufferSupportInitializeEnded   = 0;
3285 static volatile jint directBufferSupportInitializeFailed  = 0;
3286 static jclass    bufferClass                 = NULL;
3287 static jclass    directBufferClass           = NULL;
3288 static jclass    directByteBufferClass       = NULL;
3289 static jmethodID directByteBufferConstructor = NULL;
3290 static jfieldID  directBufferAddressField    = NULL;
3291 static jfieldID  bufferCapacityField         = NULL;
3292 
3293 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3294   Handle loader;            // null (bootstrap) loader
3295   Handle protection_domain; // null protection domain
3296 
3297   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3298   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3299 
3300   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3301     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3302   }
3303   return result;
3304 }
3305 
3306 // These lookups are done with the NULL (bootstrap) ClassLoader to
3307 // circumvent any security checks that would be done by jni_FindClass.
3308 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3309 {
3310   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3311   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3312   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3313   return true;
3314 }
3315 JNI_END
3316 
3317 
3318 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3319   if (directBufferSupportInitializeFailed) {
3320     return false;
3321   }
3322 
3323   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3324     if (!lookupDirectBufferClasses(env)) {
3325       directBufferSupportInitializeFailed = 1;
3326       return false;
3327     }
3328 
3329     // Make global references for these
3330     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3331     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3332     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3333 
3334     // Get needed field and method IDs
3335     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3336     if (env->ExceptionCheck()) {
3337       env->ExceptionClear();
3338       directBufferSupportInitializeFailed = 1;
3339       return false;
3340     }
3341     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3342     if (env->ExceptionCheck()) {
3343       env->ExceptionClear();
3344       directBufferSupportInitializeFailed = 1;
3345       return false;
3346     }
3347     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3348     if (env->ExceptionCheck()) {
3349       env->ExceptionClear();
3350       directBufferSupportInitializeFailed = 1;
3351       return false;
3352     }
3353 
3354     if ((directByteBufferConstructor == NULL) ||
3355         (directBufferAddressField    == NULL) ||
3356         (bufferCapacityField         == NULL)) {
3357       directBufferSupportInitializeFailed = 1;
3358       return false;
3359     }
3360 
3361     directBufferSupportInitializeEnded = 1;
3362   } else {
3363     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3364       os::naked_yield();
3365     }
3366   }
3367 
3368   return !directBufferSupportInitializeFailed;
3369 }
3370 
3371 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3372 {
3373   // thread_from_jni_environment() will block if VM is gone.
3374   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3375 
3376   JNIWrapper("jni_NewDirectByteBuffer");
3377  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3378 
3379   if (!directBufferSupportInitializeEnded) {
3380     if (!initializeDirectBufferSupport(env, thread)) {
3381       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3382       return NULL;
3383     }
3384   }
3385 
3386   // Being paranoid about accidental sign extension on address
3387   jlong addr = (jlong) ((uintptr_t) address);
3388   // NOTE that package-private DirectByteBuffer constructor currently
3389   // takes int capacity
3390   jint  cap  = (jint)  capacity;
3391   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3392   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3393   return ret;
3394 }
3395 
3396 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3397                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3398 
3399 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3400 {
3401   // thread_from_jni_environment() will block if VM is gone.
3402   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3403 
3404   JNIWrapper("jni_GetDirectBufferAddress");
3405   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3406   void* ret = NULL;
3407   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3408 
3409   if (!directBufferSupportInitializeEnded) {
3410     if (!initializeDirectBufferSupport(env, thread)) {
3411       return 0;
3412     }
3413   }
3414 
3415   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3416     return 0;
3417   }
3418 
3419   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3420   return ret;
3421 }
3422 
3423 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3424                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3425 
3426 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3427 {
3428   // thread_from_jni_environment() will block if VM is gone.
3429   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3430 
3431   JNIWrapper("jni_GetDirectBufferCapacity");
3432   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3433   jlong ret = -1;
3434   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3435 
3436   if (!directBufferSupportInitializeEnded) {
3437     if (!initializeDirectBufferSupport(env, thread)) {
3438       ret = 0;
3439       return ret;
3440     }
3441   }
3442 
3443   if (buf == NULL) {
3444     return -1;
3445   }
3446 
3447   if (!env->IsInstanceOf(buf, directBufferClass)) {
3448     return -1;
3449   }
3450 
3451   // NOTE that capacity is currently an int in the implementation
3452   ret = env->GetIntField(buf, bufferCapacityField);
3453   return ret;
3454 }
3455 
3456 
3457 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3458   JNIWrapper("GetVersion");
3459   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3460   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3461   return CurrentVersion;
3462 JNI_END
3463 
3464 extern struct JavaVM_ main_vm;
3465 
3466 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3467   JNIWrapper("jni_GetJavaVM");
3468   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3469   *vm  = (JavaVM *)(&main_vm);
3470   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3471   return JNI_OK;
3472 JNI_END
3473 
3474 
3475 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3476   JNIWrapper("GetModule");
3477   return Modules::get_module(clazz, THREAD);
3478 JNI_END
3479 
3480 
3481 // Structure containing all jni functions
3482 struct JNINativeInterface_ jni_NativeInterface = {
3483     NULL,
3484     NULL,
3485     NULL,
3486 
3487     NULL,
3488 
3489     jni_GetVersion,
3490 
3491     jni_DefineClass,
3492     jni_FindClass,
3493 
3494     jni_FromReflectedMethod,
3495     jni_FromReflectedField,
3496 
3497     jni_ToReflectedMethod,
3498 
3499     jni_GetSuperclass,
3500     jni_IsAssignableFrom,
3501 
3502     jni_ToReflectedField,
3503 
3504     jni_Throw,
3505     jni_ThrowNew,
3506     jni_ExceptionOccurred,
3507     jni_ExceptionDescribe,
3508     jni_ExceptionClear,
3509     jni_FatalError,
3510 
3511     jni_PushLocalFrame,
3512     jni_PopLocalFrame,
3513 
3514     jni_NewGlobalRef,
3515     jni_DeleteGlobalRef,
3516     jni_DeleteLocalRef,
3517     jni_IsSameObject,
3518 
3519     jni_NewLocalRef,
3520     jni_EnsureLocalCapacity,
3521 
3522     jni_AllocObject,
3523     jni_NewObject,
3524     jni_NewObjectV,
3525     jni_NewObjectA,
3526 
3527     jni_GetObjectClass,
3528     jni_IsInstanceOf,
3529 
3530     jni_GetMethodID,
3531 
3532     jni_CallObjectMethod,
3533     jni_CallObjectMethodV,
3534     jni_CallObjectMethodA,
3535     jni_CallBooleanMethod,
3536     jni_CallBooleanMethodV,
3537     jni_CallBooleanMethodA,
3538     jni_CallByteMethod,
3539     jni_CallByteMethodV,
3540     jni_CallByteMethodA,
3541     jni_CallCharMethod,
3542     jni_CallCharMethodV,
3543     jni_CallCharMethodA,
3544     jni_CallShortMethod,
3545     jni_CallShortMethodV,
3546     jni_CallShortMethodA,
3547     jni_CallIntMethod,
3548     jni_CallIntMethodV,
3549     jni_CallIntMethodA,
3550     jni_CallLongMethod,
3551     jni_CallLongMethodV,
3552     jni_CallLongMethodA,
3553     jni_CallFloatMethod,
3554     jni_CallFloatMethodV,
3555     jni_CallFloatMethodA,
3556     jni_CallDoubleMethod,
3557     jni_CallDoubleMethodV,
3558     jni_CallDoubleMethodA,
3559     jni_CallVoidMethod,
3560     jni_CallVoidMethodV,
3561     jni_CallVoidMethodA,
3562 
3563     jni_CallNonvirtualObjectMethod,
3564     jni_CallNonvirtualObjectMethodV,
3565     jni_CallNonvirtualObjectMethodA,
3566     jni_CallNonvirtualBooleanMethod,
3567     jni_CallNonvirtualBooleanMethodV,
3568     jni_CallNonvirtualBooleanMethodA,
3569     jni_CallNonvirtualByteMethod,
3570     jni_CallNonvirtualByteMethodV,
3571     jni_CallNonvirtualByteMethodA,
3572     jni_CallNonvirtualCharMethod,
3573     jni_CallNonvirtualCharMethodV,
3574     jni_CallNonvirtualCharMethodA,
3575     jni_CallNonvirtualShortMethod,
3576     jni_CallNonvirtualShortMethodV,
3577     jni_CallNonvirtualShortMethodA,
3578     jni_CallNonvirtualIntMethod,
3579     jni_CallNonvirtualIntMethodV,
3580     jni_CallNonvirtualIntMethodA,
3581     jni_CallNonvirtualLongMethod,
3582     jni_CallNonvirtualLongMethodV,
3583     jni_CallNonvirtualLongMethodA,
3584     jni_CallNonvirtualFloatMethod,
3585     jni_CallNonvirtualFloatMethodV,
3586     jni_CallNonvirtualFloatMethodA,
3587     jni_CallNonvirtualDoubleMethod,
3588     jni_CallNonvirtualDoubleMethodV,
3589     jni_CallNonvirtualDoubleMethodA,
3590     jni_CallNonvirtualVoidMethod,
3591     jni_CallNonvirtualVoidMethodV,
3592     jni_CallNonvirtualVoidMethodA,
3593 
3594     jni_GetFieldID,
3595 
3596     jni_GetObjectField,
3597     jni_GetBooleanField,
3598     jni_GetByteField,
3599     jni_GetCharField,
3600     jni_GetShortField,
3601     jni_GetIntField,
3602     jni_GetLongField,
3603     jni_GetFloatField,
3604     jni_GetDoubleField,
3605 
3606     jni_SetObjectField,
3607     jni_SetBooleanField,
3608     jni_SetByteField,
3609     jni_SetCharField,
3610     jni_SetShortField,
3611     jni_SetIntField,
3612     jni_SetLongField,
3613     jni_SetFloatField,
3614     jni_SetDoubleField,
3615 
3616     jni_GetStaticMethodID,
3617 
3618     jni_CallStaticObjectMethod,
3619     jni_CallStaticObjectMethodV,
3620     jni_CallStaticObjectMethodA,
3621     jni_CallStaticBooleanMethod,
3622     jni_CallStaticBooleanMethodV,
3623     jni_CallStaticBooleanMethodA,
3624     jni_CallStaticByteMethod,
3625     jni_CallStaticByteMethodV,
3626     jni_CallStaticByteMethodA,
3627     jni_CallStaticCharMethod,
3628     jni_CallStaticCharMethodV,
3629     jni_CallStaticCharMethodA,
3630     jni_CallStaticShortMethod,
3631     jni_CallStaticShortMethodV,
3632     jni_CallStaticShortMethodA,
3633     jni_CallStaticIntMethod,
3634     jni_CallStaticIntMethodV,
3635     jni_CallStaticIntMethodA,
3636     jni_CallStaticLongMethod,
3637     jni_CallStaticLongMethodV,
3638     jni_CallStaticLongMethodA,
3639     jni_CallStaticFloatMethod,
3640     jni_CallStaticFloatMethodV,
3641     jni_CallStaticFloatMethodA,
3642     jni_CallStaticDoubleMethod,
3643     jni_CallStaticDoubleMethodV,
3644     jni_CallStaticDoubleMethodA,
3645     jni_CallStaticVoidMethod,
3646     jni_CallStaticVoidMethodV,
3647     jni_CallStaticVoidMethodA,
3648 
3649     jni_GetStaticFieldID,
3650 
3651     jni_GetStaticObjectField,
3652     jni_GetStaticBooleanField,
3653     jni_GetStaticByteField,
3654     jni_GetStaticCharField,
3655     jni_GetStaticShortField,
3656     jni_GetStaticIntField,
3657     jni_GetStaticLongField,
3658     jni_GetStaticFloatField,
3659     jni_GetStaticDoubleField,
3660 
3661     jni_SetStaticObjectField,
3662     jni_SetStaticBooleanField,
3663     jni_SetStaticByteField,
3664     jni_SetStaticCharField,
3665     jni_SetStaticShortField,
3666     jni_SetStaticIntField,
3667     jni_SetStaticLongField,
3668     jni_SetStaticFloatField,
3669     jni_SetStaticDoubleField,
3670 
3671     jni_NewString,
3672     jni_GetStringLength,
3673     jni_GetStringChars,
3674     jni_ReleaseStringChars,
3675 
3676     jni_NewStringUTF,
3677     jni_GetStringUTFLength,
3678     jni_GetStringUTFChars,
3679     jni_ReleaseStringUTFChars,
3680 
3681     jni_GetArrayLength,
3682 
3683     jni_NewObjectArray,
3684     jni_GetObjectArrayElement,
3685     jni_SetObjectArrayElement,
3686 
3687     jni_NewBooleanArray,
3688     jni_NewByteArray,
3689     jni_NewCharArray,
3690     jni_NewShortArray,
3691     jni_NewIntArray,
3692     jni_NewLongArray,
3693     jni_NewFloatArray,
3694     jni_NewDoubleArray,
3695 
3696     jni_GetBooleanArrayElements,
3697     jni_GetByteArrayElements,
3698     jni_GetCharArrayElements,
3699     jni_GetShortArrayElements,
3700     jni_GetIntArrayElements,
3701     jni_GetLongArrayElements,
3702     jni_GetFloatArrayElements,
3703     jni_GetDoubleArrayElements,
3704 
3705     jni_ReleaseBooleanArrayElements,
3706     jni_ReleaseByteArrayElements,
3707     jni_ReleaseCharArrayElements,
3708     jni_ReleaseShortArrayElements,
3709     jni_ReleaseIntArrayElements,
3710     jni_ReleaseLongArrayElements,
3711     jni_ReleaseFloatArrayElements,
3712     jni_ReleaseDoubleArrayElements,
3713 
3714     jni_GetBooleanArrayRegion,
3715     jni_GetByteArrayRegion,
3716     jni_GetCharArrayRegion,
3717     jni_GetShortArrayRegion,
3718     jni_GetIntArrayRegion,
3719     jni_GetLongArrayRegion,
3720     jni_GetFloatArrayRegion,
3721     jni_GetDoubleArrayRegion,
3722 
3723     jni_SetBooleanArrayRegion,
3724     jni_SetByteArrayRegion,
3725     jni_SetCharArrayRegion,
3726     jni_SetShortArrayRegion,
3727     jni_SetIntArrayRegion,
3728     jni_SetLongArrayRegion,
3729     jni_SetFloatArrayRegion,
3730     jni_SetDoubleArrayRegion,
3731 
3732     jni_RegisterNatives,
3733     jni_UnregisterNatives,
3734 
3735     jni_MonitorEnter,
3736     jni_MonitorExit,
3737 
3738     jni_GetJavaVM,
3739 
3740     jni_GetStringRegion,
3741     jni_GetStringUTFRegion,
3742 
3743     jni_GetPrimitiveArrayCritical,
3744     jni_ReleasePrimitiveArrayCritical,
3745 
3746     jni_GetStringCritical,
3747     jni_ReleaseStringCritical,
3748 
3749     jni_NewWeakGlobalRef,
3750     jni_DeleteWeakGlobalRef,
3751 
3752     jni_ExceptionCheck,
3753 
3754     jni_NewDirectByteBuffer,
3755     jni_GetDirectBufferAddress,
3756     jni_GetDirectBufferCapacity,
3757 
3758     // New 1_6 features
3759 
3760     jni_GetObjectRefType,
3761 
3762     // Module features
3763 
3764     jni_GetModule
3765 };
3766 
3767 
3768 // For jvmti use to modify jni function table.
3769 // Java threads in native contiues to run until it is transitioned
3770 // to VM at safepoint. Before the transition or before it is blocked
3771 // for safepoint it may access jni function table. VM could crash if
3772 // any java thread access the jni function table in the middle of memcpy.
3773 // To avoid this each function pointers are copied automically.
3774 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3775   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3776   intptr_t *a = (intptr_t *) jni_functions();
3777   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3778   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3779     Atomic::store_ptr(*b++, a++);
3780   }
3781 }
3782 
3783 void quicken_jni_functions() {
3784   // Replace Get<Primitive>Field with fast versions
3785   if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3786       && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3787 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3788       // windows x86 currently needs SEH wrapper and the gain of the fast
3789       // versions currently isn't certain for server vm on uniprocessor.
3790       && os::is_MP()
3791 #endif
3792   ) {
3793     address func;
3794     func = JNI_FastGetField::generate_fast_get_boolean_field();
3795     if (func != (address)-1) {
3796       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3797     }
3798     func = JNI_FastGetField::generate_fast_get_byte_field();
3799     if (func != (address)-1) {
3800       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3801     }
3802     func = JNI_FastGetField::generate_fast_get_char_field();
3803     if (func != (address)-1) {
3804       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3805     }
3806     func = JNI_FastGetField::generate_fast_get_short_field();
3807     if (func != (address)-1) {
3808       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3809     }
3810     func = JNI_FastGetField::generate_fast_get_int_field();
3811     if (func != (address)-1) {
3812       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3813     }
3814     func = JNI_FastGetField::generate_fast_get_long_field();
3815     if (func != (address)-1) {
3816       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3817     }
3818     func = JNI_FastGetField::generate_fast_get_float_field();
3819     if (func != (address)-1) {
3820       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3821     }
3822     func = JNI_FastGetField::generate_fast_get_double_field();
3823     if (func != (address)-1) {
3824       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3825     }
3826   }
3827 }
3828 
3829 // Returns the function structure
3830 struct JNINativeInterface_* jni_functions() {
3831 #if INCLUDE_JNI_CHECK
3832   if (CheckJNICalls) return jni_functions_check();
3833 #endif // INCLUDE_JNI_CHECK
3834   return &jni_NativeInterface;
3835 }
3836 
3837 // Returns the function structure
3838 struct JNINativeInterface_* jni_functions_nocheck() {
3839   return &jni_NativeInterface;
3840 }
3841 
3842 
3843 // Invocation API
3844 
3845 
3846 // Forward declaration
3847 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3848 
3849 // Global invocation API vars
3850 volatile jint vm_created = 0;
3851 // Indicate whether it is safe to recreate VM
3852 volatile jint safe_to_recreate_vm = 1;
3853 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3854 
3855 
3856 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3857 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3858 
3859 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3860                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3861 
3862 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3863   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3864   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3865   jint ret = JNI_ERR;
3866   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3867 
3868   if (Threads::is_supported_jni_version(args->version)) {
3869     ret = JNI_OK;
3870   }
3871   // 1.1 style no longer supported in hotspot.
3872   // According the JNI spec, we should update args->version on return.
3873   // We also use the structure to communicate with launcher about default
3874   // stack size.
3875   if (args->version == JNI_VERSION_1_1) {
3876     args->version = JNI_VERSION_1_2;
3877     // javaStackSize is int in arguments structure
3878     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3879     args->javaStackSize = (jint)(ThreadStackSize * K);
3880   }
3881   return ret;
3882 }
3883 
3884 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3885                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3886 
3887 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3888   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3889 
3890   jint result = JNI_ERR;
3891   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3892 
3893   // We're about to use Atomic::xchg for synchronization.  Some Zero
3894   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3895   // but __sync_lock_test_and_set is not guaranteed to do what we want
3896   // on all architectures.  So we check it works before relying on it.
3897 #if defined(ZERO) && defined(ASSERT)
3898   {
3899     jint a = 0xcafebabe;
3900     jint b = Atomic::xchg(0xdeadbeef, &a);
3901     void *c = &a;
3902     void *d = Atomic::xchg_ptr(&b, &c);
3903     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3904     assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3905   }
3906 #endif // ZERO && ASSERT
3907 
3908   // At the moment it's only possible to have one Java VM,
3909   // since some of the runtime state is in global variables.
3910 
3911   // We cannot use our mutex locks here, since they only work on
3912   // Threads. We do an atomic compare and exchange to ensure only
3913   // one thread can call this method at a time
3914 
3915   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3916   // the add/dec implementations are dependent on whether we are running
3917   // on a multiprocessor, and at this stage of initialization the os::is_MP
3918   // function used to determine this will always return false. Atomic::xchg
3919   // does not have this problem.
3920   if (Atomic::xchg(1, &vm_created) == 1) {
3921     return JNI_EEXIST;   // already created, or create attempt in progress
3922   }
3923   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3924     return JNI_ERR;  // someone tried and failed and retry not allowed.
3925   }
3926 
3927   assert(vm_created == 1, "vm_created is true during the creation");
3928 
3929   /**
3930    * Certain errors during initialization are recoverable and do not
3931    * prevent this method from being called again at a later time
3932    * (perhaps with different arguments).  However, at a certain
3933    * point during initialization if an error occurs we cannot allow
3934    * this function to be called again (or it will crash).  In those
3935    * situations, the 'canTryAgain' flag is set to false, which atomically
3936    * sets safe_to_recreate_vm to 1, such that any new call to
3937    * JNI_CreateJavaVM will immediately fail using the above logic.
3938    */
3939   bool can_try_again = true;
3940 
3941   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3942   if (result == JNI_OK) {
3943     JavaThread *thread = JavaThread::current();
3944     assert(!thread->has_pending_exception(), "should have returned not OK");
3945     /* thread is thread_in_vm here */
3946     *vm = (JavaVM *)(&main_vm);
3947     *(JNIEnv**)penv = thread->jni_environment();
3948 
3949 #if INCLUDE_JVMCI
3950     if (EnableJVMCI) {
3951       if (UseJVMCICompiler) {
3952         // JVMCI is initialized on a CompilerThread
3953         if (BootstrapJVMCI) {
3954           JavaThread* THREAD = thread;
3955           JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3956           compiler->bootstrap(THREAD);
3957           if (HAS_PENDING_EXCEPTION) {
3958             HandleMark hm;
3959             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3960           }
3961         }
3962       }
3963     }
3964 #endif
3965 
3966     // Tracks the time application was running before GC
3967     RuntimeService::record_application_start();
3968 
3969     // Notify JVMTI
3970     if (JvmtiExport::should_post_thread_life()) {
3971        JvmtiExport::post_thread_start(thread);
3972     }
3973 
3974     EventThreadStart event;
3975     if (event.should_commit()) {
3976       event.set_thread(THREAD_TRACE_ID(thread));
3977       event.commit();
3978     }
3979 
3980 #ifndef PRODUCT
3981     // Check if we should compile all classes on bootclasspath
3982     if (CompileTheWorld) ClassLoader::compile_the_world();
3983     if (ReplayCompiles) ciReplay::replay(thread);
3984 
3985     // Some platforms (like Win*) need a wrapper around these test
3986     // functions in order to properly handle error conditions.
3987     VMError::test_error_handler();
3988     if (ExecuteInternalVMTests) {
3989       InternalVMTests::run();
3990     }
3991 #endif
3992 
3993     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3994     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3995   } else {
3996     // If create_vm exits because of a pending exception, exit with that
3997     // exception.  In the future when we figure out how to reclaim memory,
3998     // we may be able to exit with JNI_ERR and allow the calling application
3999     // to continue.
4000     if (Universe::is_fully_initialized()) {
4001       // otherwise no pending exception possible - VM will already have aborted
4002       JavaThread* THREAD = JavaThread::current();
4003       if (HAS_PENDING_EXCEPTION) {
4004         HandleMark hm;
4005         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4006       }
4007     }
4008 
4009     if (can_try_again) {
4010       // reset safe_to_recreate_vm to 1 so that retrial would be possible
4011       safe_to_recreate_vm = 1;
4012     }
4013 
4014     // Creation failed. We must reset vm_created
4015     *vm = 0;
4016     *(JNIEnv**)penv = 0;
4017     // reset vm_created last to avoid race condition. Use OrderAccess to
4018     // control both compiler and architectural-based reordering.
4019     OrderAccess::release_store(&vm_created, 0);
4020   }
4021 
4022   // Flush stdout and stderr before exit.
4023   fflush(stdout);
4024   fflush(stderr);
4025 
4026   return result;
4027 
4028 }
4029 
4030 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4031   jint result = 0;
4032   // On Windows, let CreateJavaVM run with SEH protection
4033 #ifdef _WIN32
4034   __try {
4035 #endif
4036     result = JNI_CreateJavaVM_inner(vm, penv, args);
4037 #ifdef _WIN32
4038   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4039     // Nothing to do.
4040   }
4041 #endif
4042   return result;
4043 }
4044 
4045 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4046   // See bug 4367188, the wrapper can sometimes cause VM crashes
4047   // JNIWrapper("GetCreatedJavaVMs");
4048 
4049   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4050 
4051   if (vm_created) {
4052     if (numVMs != NULL) *numVMs = 1;
4053     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4054   } else {
4055     if (numVMs != NULL) *numVMs = 0;
4056   }
4057   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4058   return JNI_OK;
4059 }
4060 
4061 extern "C" {
4062 
4063 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4064                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4065 
4066 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4067   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4068   jint res = JNI_ERR;
4069   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4070 
4071   if (!vm_created) {
4072     res = JNI_ERR;
4073     return res;
4074   }
4075 
4076   JNIWrapper("DestroyJavaVM");
4077   JNIEnv *env;
4078   JavaVMAttachArgs destroyargs;
4079   destroyargs.version = CurrentVersion;
4080   destroyargs.name = (char *)"DestroyJavaVM";
4081   destroyargs.group = NULL;
4082   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4083   if (res != JNI_OK) {
4084     return res;
4085   }
4086 
4087   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4088   JavaThread* thread = JavaThread::current();
4089   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4090   if (Threads::destroy_vm()) {
4091     // Should not change thread state, VM is gone
4092     vm_created = false;
4093     res = JNI_OK;
4094     return res;
4095   } else {
4096     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4097     res = JNI_ERR;
4098     return res;
4099   }
4100 }
4101 
4102 
4103 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4104   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4105 
4106   // Check below commented out from JDK1.2fcs as well
4107   /*
4108   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4109     return JNI_EVERSION;
4110   }
4111   */
4112 
4113   Thread* t = Thread::current_or_null();
4114   if (t != NULL) {
4115     // If the thread has been attached this operation is a no-op
4116     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4117     return JNI_OK;
4118   }
4119 
4120   // Create a thread and mark it as attaching so it will be skipped by the
4121   // ThreadsListEnumerator - see CR 6404306
4122   JavaThread* thread = new JavaThread(true);
4123 
4124   // Set correct safepoint info. The thread is going to call into Java when
4125   // initializing the Java level thread object. Hence, the correct state must
4126   // be set in order for the Safepoint code to deal with it correctly.
4127   thread->set_thread_state(_thread_in_vm);
4128   thread->record_stack_base_and_size();
4129   thread->initialize_thread_current();
4130 
4131   if (!os::create_attached_thread(thread)) {
4132     delete thread;
4133     return JNI_ERR;
4134   }
4135   // Enable stack overflow checks
4136   thread->create_stack_guard_pages();
4137 
4138   thread->initialize_tlab();
4139 
4140   thread->cache_global_variables();
4141 
4142   // Crucial that we do not have a safepoint check for this thread, since it has
4143   // not been added to the Thread list yet.
4144   { Threads_lock->lock_without_safepoint_check();
4145     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4146     // avoid this thread trying to do a GC before it is added to the thread-list
4147     thread->set_active_handles(JNIHandleBlock::allocate_block());
4148     Threads::add(thread, daemon);
4149     Threads_lock->unlock();
4150   }
4151   // Create thread group and name info from attach arguments
4152   oop group = NULL;
4153   char* thread_name = NULL;
4154   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4155     group = JNIHandles::resolve(args->group);
4156     thread_name = args->name; // may be NULL
4157   }
4158   if (group == NULL) group = Universe::main_thread_group();
4159 
4160   // Create Java level thread object and attach it to this thread
4161   bool attach_failed = false;
4162   {
4163     EXCEPTION_MARK;
4164     HandleMark hm(THREAD);
4165     Handle thread_group(THREAD, group);
4166     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4167     if (HAS_PENDING_EXCEPTION) {
4168       CLEAR_PENDING_EXCEPTION;
4169       // cleanup outside the handle mark.
4170       attach_failed = true;
4171     }
4172   }
4173 
4174   if (attach_failed) {
4175     // Added missing cleanup
4176     thread->cleanup_failed_attach_current_thread();
4177     return JNI_ERR;
4178   }
4179 
4180   // mark the thread as no longer attaching
4181   // this uses a fence to push the change through so we don't have
4182   // to regrab the threads_lock
4183   thread->set_done_attaching_via_jni();
4184 
4185   // Set java thread status.
4186   java_lang_Thread::set_thread_status(thread->threadObj(),
4187               java_lang_Thread::RUNNABLE);
4188 
4189   // Notify the debugger
4190   if (JvmtiExport::should_post_thread_life()) {
4191     JvmtiExport::post_thread_start(thread);
4192   }
4193 
4194   EventThreadStart event;
4195   if (event.should_commit()) {
4196     event.set_thread(THREAD_TRACE_ID(thread));
4197     event.commit();
4198   }
4199 
4200   *(JNIEnv**)penv = thread->jni_environment();
4201 
4202   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4203   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4204   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4205   // needed.
4206 
4207   ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4208 
4209   // Perform any platform dependent FPU setup
4210   os::setup_fpu();
4211 
4212   return JNI_OK;
4213 }
4214 
4215 
4216 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4217   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4218   if (!vm_created) {
4219   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4220     return JNI_ERR;
4221   }
4222 
4223   JNIWrapper("AttachCurrentThread");
4224   jint ret = attach_current_thread(vm, penv, _args, false);
4225   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4226   return ret;
4227 }
4228 
4229 
4230 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4231   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4232   VM_Exit::block_if_vm_exited();
4233 
4234   JNIWrapper("DetachCurrentThread");
4235 
4236   // If the thread has already been detached the operation is a no-op
4237   if (Thread::current_or_null() == NULL) {
4238   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4239     return JNI_OK;
4240   }
4241 
4242   JavaThread* thread = JavaThread::current();
4243   if (thread->has_last_Java_frame()) {
4244   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4245     // Can't detach a thread that's running java, that can't work.
4246     return JNI_ERR;
4247   }
4248 
4249   // Safepoint support. Have to do call-back to safepoint code, if in the
4250   // middel of a safepoint operation
4251   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4252 
4253   // XXX: Note that JavaThread::exit() call below removes the guards on the
4254   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4255   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4256   // of the guards is visible in jni_AttachCurrentThread above,
4257   // the removal of the guards is buried below in JavaThread::exit()
4258   // here. The abstraction should be more symmetrically either exposed
4259   // or hidden (e.g. it could probably be hidden in the same
4260   // (platform-dependent) methods where we do alternate stack
4261   // maintenance work?)
4262   thread->exit(false, JavaThread::jni_detach);
4263   delete thread;
4264 
4265   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4266   return JNI_OK;
4267 }
4268 
4269 DT_RETURN_MARK_DECL(GetEnv, jint
4270                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4271 
4272 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4273   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4274   jint ret = JNI_ERR;
4275   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4276 
4277   if (!vm_created) {
4278     *penv = NULL;
4279     ret = JNI_EDETACHED;
4280     return ret;
4281   }
4282 
4283   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4284     return ret;
4285   }
4286 
4287 #ifndef JVMPI_VERSION_1
4288 // need these in order to be polite about older agents
4289 #define JVMPI_VERSION_1   ((jint)0x10000001)
4290 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4291 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4292 #endif // !JVMPI_VERSION_1
4293 
4294   Thread* thread = Thread::current_or_null();
4295   if (thread != NULL && thread->is_Java_thread()) {
4296     if (Threads::is_supported_jni_version_including_1_1(version)) {
4297       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4298       ret = JNI_OK;
4299       return ret;
4300 
4301     } else if (version == JVMPI_VERSION_1 ||
4302                version == JVMPI_VERSION_1_1 ||
4303                version == JVMPI_VERSION_1_2) {
4304       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4305       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4306       ret = JNI_EVERSION;
4307       return ret;
4308     } else if (JvmtiExport::is_jvmdi_version(version)) {
4309       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4310       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4311       ret = JNI_EVERSION;
4312       return ret;
4313     } else {
4314       *penv = NULL;
4315       ret = JNI_EVERSION;
4316       return ret;
4317     }
4318   } else {
4319     *penv = NULL;
4320     ret = JNI_EDETACHED;
4321     return ret;
4322   }
4323 }
4324 
4325 
4326 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4327   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4328   if (!vm_created) {
4329   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4330     return JNI_ERR;
4331   }
4332 
4333   JNIWrapper("AttachCurrentThreadAsDaemon");
4334   jint ret = attach_current_thread(vm, penv, _args, true);
4335   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4336   return ret;
4337 }
4338 
4339 
4340 } // End extern "C"
4341 
4342 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4343     NULL,
4344     NULL,
4345     NULL,
4346 
4347     jni_DestroyJavaVM,
4348     jni_AttachCurrentThread,
4349     jni_DetachCurrentThread,
4350     jni_GetEnv,
4351     jni_AttachCurrentThreadAsDaemon
4352 };
--- EOF ---