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